Subject Code BTTEX05002 Semester Vth

Textile Engineering Department

CTF MPSTME SVKMs NMIMS Shirpur

By Prof P P Kolte

Unit I Carding

Necessity amp Objects of carding Operations involved in carding Fundamental

actions in carding Detail study with construction and working of carding machine

Various sections of carding machine Types of card clothing and their significance and

effects Theories of carding action Analysis of flat actions and carding force

Introduction to Stripping Grinding and Burnishing operations Continuous Feed vs Lap

Feed Various settings of card its influences on carding quality amp production

Unit-II Carding

Transfer mechanism of fibres Consolidation of web into sliver Trumpet amp

Calendar roller condensation Parameters affecting Settings Quality and Production

Concept of draft Types of Draft Distribution of draft Actual and Mechanical draft

Card drive amp calculations related to Efficiency Production of carding machine

Carding faults and their origin waste collection controlling and handling Card

autoleveller Principles Types Advantages and Disadvantages Introduction to

developments in carding

Unit-III Draw frame

Introduction objective of draw frame operating principle Attenuation

(draft) the draft the drafting operation drafting force behavior of the fibres in the

drafting zone friction fields nature and role of fibre friction in drafting distribution of

draft additional effects of draft perfect and real drafting nature of drafting

irregularities coiling- delivery condensing sliver coiling can changing Drafting force

in relation to other parameters- Draft ratio Roller Setting Fibre Crimp sliver density

Roller lapping tendency Selection of creel and web tension draft Monitoring and auto

leveling structure of computerized data collection and monitoring systems waste

collection controlling and handling Production calculations

Unit IV Combing Preparatory

Objects need different types of passages used Preparation for combing

outline operating principles of sliver lap machine ribbon lap machine sliver doubling

machine and super lap machines comparative assessment of web doubling and sliver

doubling processes Systems of lap preparation configuration of fibre feed and its effect

on the quality of product calculation regarding gearing draft production of sliver lap

ribbon lap and super lap machines

Unit-V Combing

Combing Object of combing introduction tasks of comber types of comber

sequence of operation in a rectilinear comber Technology of combing parameters

influencing combing operation- raw material material preparation parallelization of

fibres in the sheet sheet thickness (wt) evenness of the lap sheet disposition of hooks

degree of combing noil percentage and fractionating efficiency of comber

Unit-VI Combing

Combing machines outline classification description of functions- feed feed

of lap sheet feed device nipper assembly cylinder comb top comb take-off amp the

material piecing withdrawal of the web and formation of sliver sliver take-off

drafting arrangement coiling of sliver waste removal (stripping) timing diagram of

comber motions automation in comber Detailed setting of comber machine and gauges

used for setting Gearing drafts and production calculation of combing machine

Text Books

1 Spun yarn technology volume II carding - AVentasubramani

2 Chattopadhyay R and Rengasamay R ldquoSpinning Drawing Combing and Rovingrdquo

NCUTE-Pilot Programme 1999

Reference Book

1 Khare A R ldquoElements of combingrdquo Sai book center Mumbai 1999

2 Khare A R ldquoElements of cardingrdquo Sai book Centre Mumbai 1999

5 Klein W ldquoThe Technology of Short-staple Spinning ldquo The Textile Institute

6 Klein W ldquo A Practical Guide to Opening and Carding ldquo The Textile Institute

8 Technology of Carding ndash R Chattopadhaya NCUTE Publication

Objectives

To have an introduction regarding carding process

To study working of chute feed system

To study advantages and disadvantages of chute feed system

To study various developments in chute feed system

Chute feed is a system of feeding small tufts of cotton fibres

directly from blow room to a series of cards arranged in a circuit

through pneumatic pipe

A condenser in the

pneumatic pipe sucks

the material from blow

room and delivers it to

the flock feeder through

pneumatic pipe by way

of the filling trunk

Fig Flock

Feeder or

Chute Feed

System

The automatic continuous feed directly linked to the blow room

eliminates the lap formation This increases the working efficiency of the

blow room

The main power requirement in doffing the lap weighing

transportation to card and feeding at the card is eliminated

The processing of rejected laps in the blow room is avoided

The fibres are fed to the card in loose sheet form as against

compressed form so that trash particles can be easily extracted from

fibres by the carding action

Excessive sliver irregularities due to the lap licking during high

humidity double lap feeding lap splitting lap piecing etc are

eliminated

When compared to lap fed there is a reduction of 1 CV flock

feeding card sliver

Crushing of foreign materials seed bits and other trash particles during

calendaring and difficulty of removing a subsequent processes is

reduced

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Unit I Carding

Necessity amp Objects of carding Operations involved in carding Fundamental

actions in carding Detail study with construction and working of carding machine

Various sections of carding machine Types of card clothing and their significance and

effects Theories of carding action Analysis of flat actions and carding force

Introduction to Stripping Grinding and Burnishing operations Continuous Feed vs Lap

Feed Various settings of card its influences on carding quality amp production

Unit-II Carding

Transfer mechanism of fibres Consolidation of web into sliver Trumpet amp

Calendar roller condensation Parameters affecting Settings Quality and Production

Concept of draft Types of Draft Distribution of draft Actual and Mechanical draft

Card drive amp calculations related to Efficiency Production of carding machine

Carding faults and their origin waste collection controlling and handling Card

autoleveller Principles Types Advantages and Disadvantages Introduction to

developments in carding

Unit-III Draw frame

Introduction objective of draw frame operating principle Attenuation

(draft) the draft the drafting operation drafting force behavior of the fibres in the

drafting zone friction fields nature and role of fibre friction in drafting distribution of

draft additional effects of draft perfect and real drafting nature of drafting

irregularities coiling- delivery condensing sliver coiling can changing Drafting force

in relation to other parameters- Draft ratio Roller Setting Fibre Crimp sliver density

Roller lapping tendency Selection of creel and web tension draft Monitoring and auto

leveling structure of computerized data collection and monitoring systems waste

collection controlling and handling Production calculations

Unit IV Combing Preparatory

Objects need different types of passages used Preparation for combing

outline operating principles of sliver lap machine ribbon lap machine sliver doubling

machine and super lap machines comparative assessment of web doubling and sliver

doubling processes Systems of lap preparation configuration of fibre feed and its effect

on the quality of product calculation regarding gearing draft production of sliver lap

ribbon lap and super lap machines

Unit-V Combing

Combing Object of combing introduction tasks of comber types of comber

sequence of operation in a rectilinear comber Technology of combing parameters

influencing combing operation- raw material material preparation parallelization of

fibres in the sheet sheet thickness (wt) evenness of the lap sheet disposition of hooks

degree of combing noil percentage and fractionating efficiency of comber

Unit-VI Combing

Combing machines outline classification description of functions- feed feed

of lap sheet feed device nipper assembly cylinder comb top comb take-off amp the

material piecing withdrawal of the web and formation of sliver sliver take-off

drafting arrangement coiling of sliver waste removal (stripping) timing diagram of

comber motions automation in comber Detailed setting of comber machine and gauges

used for setting Gearing drafts and production calculation of combing machine

Text Books

1 Spun yarn technology volume II carding - AVentasubramani

2 Chattopadhyay R and Rengasamay R ldquoSpinning Drawing Combing and Rovingrdquo

NCUTE-Pilot Programme 1999

Reference Book

1 Khare A R ldquoElements of combingrdquo Sai book center Mumbai 1999

2 Khare A R ldquoElements of cardingrdquo Sai book Centre Mumbai 1999

5 Klein W ldquoThe Technology of Short-staple Spinning ldquo The Textile Institute

6 Klein W ldquo A Practical Guide to Opening and Carding ldquo The Textile Institute

8 Technology of Carding ndash R Chattopadhaya NCUTE Publication

Objectives

To have an introduction regarding carding process

To study working of chute feed system

To study advantages and disadvantages of chute feed system

To study various developments in chute feed system

Chute feed is a system of feeding small tufts of cotton fibres

directly from blow room to a series of cards arranged in a circuit

through pneumatic pipe

A condenser in the

pneumatic pipe sucks

the material from blow

room and delivers it to

the flock feeder through

pneumatic pipe by way

of the filling trunk

Fig Flock

Feeder or

Chute Feed

System

The automatic continuous feed directly linked to the blow room

eliminates the lap formation This increases the working efficiency of the

blow room

The main power requirement in doffing the lap weighing

transportation to card and feeding at the card is eliminated

The processing of rejected laps in the blow room is avoided

The fibres are fed to the card in loose sheet form as against

compressed form so that trash particles can be easily extracted from

fibres by the carding action

Excessive sliver irregularities due to the lap licking during high

humidity double lap feeding lap splitting lap piecing etc are

eliminated

When compared to lap fed there is a reduction of 1 CV flock

feeding card sliver

Crushing of foreign materials seed bits and other trash particles during

calendaring and difficulty of removing a subsequent processes is

reduced

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Unit-III Draw frame

Introduction objective of draw frame operating principle Attenuation

(draft) the draft the drafting operation drafting force behavior of the fibres in the

drafting zone friction fields nature and role of fibre friction in drafting distribution of

draft additional effects of draft perfect and real drafting nature of drafting

irregularities coiling- delivery condensing sliver coiling can changing Drafting force

in relation to other parameters- Draft ratio Roller Setting Fibre Crimp sliver density

Roller lapping tendency Selection of creel and web tension draft Monitoring and auto

leveling structure of computerized data collection and monitoring systems waste

collection controlling and handling Production calculations

Unit IV Combing Preparatory

Objects need different types of passages used Preparation for combing

outline operating principles of sliver lap machine ribbon lap machine sliver doubling

machine and super lap machines comparative assessment of web doubling and sliver

doubling processes Systems of lap preparation configuration of fibre feed and its effect

on the quality of product calculation regarding gearing draft production of sliver lap

ribbon lap and super lap machines

Unit-V Combing

Combing Object of combing introduction tasks of comber types of comber

sequence of operation in a rectilinear comber Technology of combing parameters

influencing combing operation- raw material material preparation parallelization of

fibres in the sheet sheet thickness (wt) evenness of the lap sheet disposition of hooks

degree of combing noil percentage and fractionating efficiency of comber

Unit-VI Combing

Combing machines outline classification description of functions- feed feed

of lap sheet feed device nipper assembly cylinder comb top comb take-off amp the

material piecing withdrawal of the web and formation of sliver sliver take-off

drafting arrangement coiling of sliver waste removal (stripping) timing diagram of

comber motions automation in comber Detailed setting of comber machine and gauges

used for setting Gearing drafts and production calculation of combing machine

Text Books

1 Spun yarn technology volume II carding - AVentasubramani

2 Chattopadhyay R and Rengasamay R ldquoSpinning Drawing Combing and Rovingrdquo

NCUTE-Pilot Programme 1999

Reference Book

1 Khare A R ldquoElements of combingrdquo Sai book center Mumbai 1999

2 Khare A R ldquoElements of cardingrdquo Sai book Centre Mumbai 1999

5 Klein W ldquoThe Technology of Short-staple Spinning ldquo The Textile Institute

6 Klein W ldquo A Practical Guide to Opening and Carding ldquo The Textile Institute

8 Technology of Carding ndash R Chattopadhaya NCUTE Publication

Objectives

To have an introduction regarding carding process

To study working of chute feed system

To study advantages and disadvantages of chute feed system

To study various developments in chute feed system

Chute feed is a system of feeding small tufts of cotton fibres

directly from blow room to a series of cards arranged in a circuit

through pneumatic pipe

A condenser in the

pneumatic pipe sucks

the material from blow

room and delivers it to

the flock feeder through

pneumatic pipe by way

of the filling trunk

Fig Flock

Feeder or

Chute Feed

System

The automatic continuous feed directly linked to the blow room

eliminates the lap formation This increases the working efficiency of the

blow room

The main power requirement in doffing the lap weighing

transportation to card and feeding at the card is eliminated

The processing of rejected laps in the blow room is avoided

The fibres are fed to the card in loose sheet form as against

compressed form so that trash particles can be easily extracted from

fibres by the carding action

Excessive sliver irregularities due to the lap licking during high

humidity double lap feeding lap splitting lap piecing etc are

eliminated

When compared to lap fed there is a reduction of 1 CV flock

feeding card sliver

Crushing of foreign materials seed bits and other trash particles during

calendaring and difficulty of removing a subsequent processes is

reduced

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Unit-V Combing

Combing Object of combing introduction tasks of comber types of comber

sequence of operation in a rectilinear comber Technology of combing parameters

influencing combing operation- raw material material preparation parallelization of

fibres in the sheet sheet thickness (wt) evenness of the lap sheet disposition of hooks

degree of combing noil percentage and fractionating efficiency of comber

Unit-VI Combing

Combing machines outline classification description of functions- feed feed

of lap sheet feed device nipper assembly cylinder comb top comb take-off amp the

material piecing withdrawal of the web and formation of sliver sliver take-off

drafting arrangement coiling of sliver waste removal (stripping) timing diagram of

comber motions automation in comber Detailed setting of comber machine and gauges

used for setting Gearing drafts and production calculation of combing machine

Text Books

1 Spun yarn technology volume II carding - AVentasubramani

2 Chattopadhyay R and Rengasamay R ldquoSpinning Drawing Combing and Rovingrdquo

NCUTE-Pilot Programme 1999

Reference Book

1 Khare A R ldquoElements of combingrdquo Sai book center Mumbai 1999

2 Khare A R ldquoElements of cardingrdquo Sai book Centre Mumbai 1999

5 Klein W ldquoThe Technology of Short-staple Spinning ldquo The Textile Institute

6 Klein W ldquo A Practical Guide to Opening and Carding ldquo The Textile Institute

8 Technology of Carding ndash R Chattopadhaya NCUTE Publication

Objectives

To have an introduction regarding carding process

To study working of chute feed system

To study advantages and disadvantages of chute feed system

To study various developments in chute feed system

Chute feed is a system of feeding small tufts of cotton fibres

directly from blow room to a series of cards arranged in a circuit

through pneumatic pipe

A condenser in the

pneumatic pipe sucks

the material from blow

room and delivers it to

the flock feeder through

pneumatic pipe by way

of the filling trunk

Fig Flock

Feeder or

Chute Feed

System

The automatic continuous feed directly linked to the blow room

eliminates the lap formation This increases the working efficiency of the

blow room

The main power requirement in doffing the lap weighing

transportation to card and feeding at the card is eliminated

The processing of rejected laps in the blow room is avoided

The fibres are fed to the card in loose sheet form as against

compressed form so that trash particles can be easily extracted from

fibres by the carding action

Excessive sliver irregularities due to the lap licking during high

humidity double lap feeding lap splitting lap piecing etc are

eliminated

When compared to lap fed there is a reduction of 1 CV flock

feeding card sliver

Crushing of foreign materials seed bits and other trash particles during

calendaring and difficulty of removing a subsequent processes is

reduced

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Text Books

1 Spun yarn technology volume II carding - AVentasubramani

2 Chattopadhyay R and Rengasamay R ldquoSpinning Drawing Combing and Rovingrdquo

NCUTE-Pilot Programme 1999

Reference Book

1 Khare A R ldquoElements of combingrdquo Sai book center Mumbai 1999

2 Khare A R ldquoElements of cardingrdquo Sai book Centre Mumbai 1999

5 Klein W ldquoThe Technology of Short-staple Spinning ldquo The Textile Institute

6 Klein W ldquo A Practical Guide to Opening and Carding ldquo The Textile Institute

8 Technology of Carding ndash R Chattopadhaya NCUTE Publication

Objectives

To have an introduction regarding carding process

To study working of chute feed system

To study advantages and disadvantages of chute feed system

To study various developments in chute feed system

Chute feed is a system of feeding small tufts of cotton fibres

directly from blow room to a series of cards arranged in a circuit

through pneumatic pipe

A condenser in the

pneumatic pipe sucks

the material from blow

room and delivers it to

the flock feeder through

pneumatic pipe by way

of the filling trunk

Fig Flock

Feeder or

Chute Feed

System

The automatic continuous feed directly linked to the blow room

eliminates the lap formation This increases the working efficiency of the

blow room

The main power requirement in doffing the lap weighing

transportation to card and feeding at the card is eliminated

The processing of rejected laps in the blow room is avoided

The fibres are fed to the card in loose sheet form as against

compressed form so that trash particles can be easily extracted from

fibres by the carding action

Excessive sliver irregularities due to the lap licking during high

humidity double lap feeding lap splitting lap piecing etc are

eliminated

When compared to lap fed there is a reduction of 1 CV flock

feeding card sliver

Crushing of foreign materials seed bits and other trash particles during

calendaring and difficulty of removing a subsequent processes is

reduced

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Objectives

To have an introduction regarding carding process

To study working of chute feed system

To study advantages and disadvantages of chute feed system

To study various developments in chute feed system

Chute feed is a system of feeding small tufts of cotton fibres

directly from blow room to a series of cards arranged in a circuit

through pneumatic pipe

A condenser in the

pneumatic pipe sucks

the material from blow

room and delivers it to

the flock feeder through

pneumatic pipe by way

of the filling trunk

Fig Flock

Feeder or

Chute Feed

System

The automatic continuous feed directly linked to the blow room

eliminates the lap formation This increases the working efficiency of the

blow room

The main power requirement in doffing the lap weighing

transportation to card and feeding at the card is eliminated

The processing of rejected laps in the blow room is avoided

The fibres are fed to the card in loose sheet form as against

compressed form so that trash particles can be easily extracted from

fibres by the carding action

Excessive sliver irregularities due to the lap licking during high

humidity double lap feeding lap splitting lap piecing etc are

eliminated

When compared to lap fed there is a reduction of 1 CV flock

feeding card sliver

Crushing of foreign materials seed bits and other trash particles during

calendaring and difficulty of removing a subsequent processes is

reduced

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Chute feed is a system of feeding small tufts of cotton fibres

directly from blow room to a series of cards arranged in a circuit

through pneumatic pipe

A condenser in the

pneumatic pipe sucks

the material from blow

room and delivers it to

the flock feeder through

pneumatic pipe by way

of the filling trunk

Fig Flock

Feeder or

Chute Feed

System

The automatic continuous feed directly linked to the blow room

eliminates the lap formation This increases the working efficiency of the

blow room

The main power requirement in doffing the lap weighing

transportation to card and feeding at the card is eliminated

The processing of rejected laps in the blow room is avoided

The fibres are fed to the card in loose sheet form as against

compressed form so that trash particles can be easily extracted from

fibres by the carding action

Excessive sliver irregularities due to the lap licking during high

humidity double lap feeding lap splitting lap piecing etc are

eliminated

When compared to lap fed there is a reduction of 1 CV flock

feeding card sliver

Crushing of foreign materials seed bits and other trash particles during

calendaring and difficulty of removing a subsequent processes is

reduced

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

A condenser in the

pneumatic pipe sucks

the material from blow

room and delivers it to

the flock feeder through

pneumatic pipe by way

of the filling trunk

Fig Flock

Feeder or

Chute Feed

System

The automatic continuous feed directly linked to the blow room

eliminates the lap formation This increases the working efficiency of the

blow room

The main power requirement in doffing the lap weighing

transportation to card and feeding at the card is eliminated

The processing of rejected laps in the blow room is avoided

The fibres are fed to the card in loose sheet form as against

compressed form so that trash particles can be easily extracted from

fibres by the carding action

Excessive sliver irregularities due to the lap licking during high

humidity double lap feeding lap splitting lap piecing etc are

eliminated

When compared to lap fed there is a reduction of 1 CV flock

feeding card sliver

Crushing of foreign materials seed bits and other trash particles during

calendaring and difficulty of removing a subsequent processes is

reduced

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

The automatic continuous feed directly linked to the blow room

eliminates the lap formation This increases the working efficiency of the

blow room

The main power requirement in doffing the lap weighing

transportation to card and feeding at the card is eliminated

The processing of rejected laps in the blow room is avoided

The fibres are fed to the card in loose sheet form as against

compressed form so that trash particles can be easily extracted from

fibres by the carding action

Excessive sliver irregularities due to the lap licking during high

humidity double lap feeding lap splitting lap piecing etc are

eliminated

When compared to lap fed there is a reduction of 1 CV flock

feeding card sliver

Crushing of foreign materials seed bits and other trash particles during

calendaring and difficulty of removing a subsequent processes is

reduced

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Excessive sliver irregularities due to the lap licking during high

humidity double lap feeding lap splitting lap piecing etc are

eliminated

When compared to lap fed there is a reduction of 1 CV flock

feeding card sliver

Crushing of foreign materials seed bits and other trash particles during

calendaring and difficulty of removing a subsequent processes is

reduced

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Blow room should run the same number of hours per week as the

cards do

The card production must be kept excessive to assure continuous feed

to draw frame at the time of stoppages at blow room due to maintenance

and other unavoidable problems

Chute feed system control short term variation but not the medium

and long term variations

A reliable check on the nominal count can be established in lap

forming system by controlling total lap weight and CV value of the

weight per unit length There is no such control in the chute feeding

system

Change of mixing will result in more waste in chute feed

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Necessity

It is always considered by the experts that the card is the heart of the

spinning mill

The statement ldquoWell-carded is half-spunrdquo demonstrate the immense

significance of the carding for the final result of the spinning operation

Carding is an operation where the tuft condition of the fibres is

converted into an individual fibre form

The carding is a very important process because unless the fibres are

separated into individuals they can not be spun into smooth and uniform

yarns neither can they be blended properly with other fibres

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Opening to individual fibres

Cleaning

Elimination of dust

Mixing amp Blending

Disentanglement of Neps

Elimination of short fiber

Sliver Formation

Fiber Orientation

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Fig Passage of material through carding

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

- Feed region - Licker-in region - Carding region

- Coiling region - Condensing region

Fig Passage of material through carding

Fig Passage of machine through carding mc

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Fig Passage of material through carding

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Question

What are the different objectives of the carding

What are the necessities of carding

Enlist the different zones in carding

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

A well designed feed device is expected to perform the following tasks

Clamp the batt securely over its full width

Be able to hold the material back against the action of the licker-in

Present the batt to the licker-in in such a manner that opening can be

carried out gently

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Conventional system

Fig Conventional feed device

1- Feed plate

2- Feed roller

3- Licker-in

4- Mote knife

5- Licker-in undercasing

Fig The shape of the feed plate

a- Guide surface

b- Nose of feed plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Modern system

The feed roller has a diameter of 80 - 100 mm

Fig Unidirectional feed device

1- Feed plate

2- Feed roller

3- Licker-in

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

The licker-in

- The greatest part of opening and cleaning is performed by the licker-in

- Cast roller with a diameter usually of around 250 mm

- Rotation speeds are in the range of 800 - 2000 rpm for cotton and about

600 rpm for synthetics

-The licker-in combs through a fairly thick fiber fringe at a rotation

speed of 1600 rpm (approximately 600000 wire points per second) a

circumferential speed of around 21 msec

(approximately 76 kmh) and a draft of

more than 1600

Fig The licker-in

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Degree of deterioration can and must be precisely controlled by

adjustment of

the thickness of the batt

the degree of openness of the raw material in the feed-stock

the spacing between the operating devices

the degree of orientation of the fibers in the feedstock

the aggressiveness of the clothing

the rotation speed of the licker-in

the material throughput

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Elimination of waste

The cleaning assembly consisted of 1-2 mote knives and a grid one

half of which was made of slotted sheet and another half of perforated sheet

1- Licker-in

2- Mote knife

3- Carding plate

3a- Special clothing

4- Grid with carding segment

5- Licker-in cover

Fig Carding segments under the licker-in of the Rieter C 51 card

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Function

Opening of tufts into individual fibers

Elimination of remaining impurities

Elimination of some of the short fibers

Untangling neps (possibly their elimination)

Dust removal

High degree of longitudinal orientation of the fibers

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Main cylinder

- The cylinder is usually manufactured from cast iron but is now

sometimes made of steel

- Most cylinders have a diameter of 1280 - 1300 mm (Rieter C 60 card

814 mm speed up to 900 rpm) and rotate at speeds between 250 and 500

(to 600) rpm

-The roundness tolerance must be maintained within extremely tight

limits ndash the narrowest setting distance (between the cylinder and the

doffer) is only about 01 mm

-The cylinder is generally supported in roller bearings

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Flats

- Altogether 100 - 120 flats

- The bars of the flats are made of cast iron (nowadays aluminum profiles

- Longer than the operating width of the card

- Each bar is approximately 32 - 35 mm wide

Fig A modern flat construction Fig Dirt take-up of the flats

from the entry point

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Carding plates instead of flats

Stationary carding plates were used for a short time as carding

elements in place of traveling flats

Fig Carding plates instead of flats C1 C2 C3 C4

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

In carding mc two basic actions are taking place bn two wire

covered surfaces these are

1 Carding action

2 Stripping action

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

The separation of fibres from tuft held in bn two wire surfaces is called

carding action

Following conditions

1] There should be two very closely placed (03mm or 20-30 times

dia of fibre) wire covered surfaces

2] Wire points on it should face each other ie

point to point arrangement

3] Interaction surfaces should move either in

opposite direction or in same direction

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

The process of fibre transfer from one surface to another is called

stripping

Necessary conditions ndash

- Two wire covered surfaces facing each other

- The distance bn them should be around 03mm or less ( 20 to

30 times the dia of fibre)

- One surface should face back of wire from each other ie point

to back arrangement

- Interaction surfaces should move either in opposite direction or

in same direction

The intensity of carding action is depends upon following points

- The arrangement and density of wire points

- The setting bn wire points

- The relative surface speed of the wire clothed surface

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Functions of the Doffing Region

(1) Transferring of fibres from the main cylinder on to the doffer

(2) Stripping the fibre web from the doffer

(3) Gathering the fibre web into a twist less strand (sliver)

(4) Condensing or calendering the sliver

(5) Depositing the sliver into the sliver can

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

The doffer

-The main purpose of the doffer is to take the individual fibres coming

from the cylinder and to condense them to a web form

-The doffer is mostly formed as a cast iron (or steel) drum with a

diameter of about 600 - 707 mm (680 mm on Rieter machines)

- It is fitted with metallic clothing and runs

at speeds up to about 300 mmin

Fig Clothing configuration between

main cylinder and doffer

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Detaching

- On old cards a fly-comb (a rapidly oscillating comb) oscillating at up

to 2500 strokes per minute takes the web from the doffer

- A roller (Fig 1161) now has the task of separating the web from the

doffer

Fig Web detaching using detaching rollers and transverse belts

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

Condensing web into sliver

The special funnel shape of the trumpet guide forces the web

stripped off the detaching roller to be condensed into a sliver form

Fig Condensor

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

- The sliver must be coiled in cans for storage and transport

- Can diameters now lie in the 600 to 1200 mm range and can heights are

between 1000 and 1220 mm

Fig Can filling device (coiler) Fig Laying down sliver in cans

R - Rotating plate

L - Guide passage

D - The delivery cylinders

C - The turntable can plate

A main drive for the cylinder licker-in and

flats

B drive for the infeed

C drive for the delivery ie doffer

detaching rollers and coiler

D drive for the cleaning roller of the

detaching roller

E drive for the cleaning roller of the flats

via the strip-ping roller

F fan

Several manufacturers eg Rieter

also provide a separate drive for the flats

Individual drives have the advantage that

transmission of the forces is better and

adjustments can be performed more quickly

and conveniently They are also better suited

to operation with control equipment

Fig Drive of a

modern card

(Truumltzschler)

Choice of clothing

The clothing has the greatest influence on quality and productivity

Selection criteria are

Type and design of card

Rotation speed of the cylinder

Production rate

Material throughput

Raw material type (natural or man-made fibers)

Fiber characteristics (mainly fineness length bulk dirt content)

Overall quality requirements

Price of the clothing

Service offered by the clothing supplier

Classification of card clothing

1Flexible clothings

2Semi-rigid clothings

3Metallic clothings

Flexible clothing

- Here hooks of round or oval wire set into elastic multiple-ply cloth

backings

- Each hook is bent to a U- shape and is formed with a knee that flexes

under bending load and return to its original position when the load is

removed

-In the flats the point density is in the range of 240-500 pointsinch

Fig Flexible clothing

Choice of clothing

The clothing has the greatest influence on quality and productivity

Selection criteria are

Type and design of card

Rotation speed of the cylinder

Production rate

Material throughput

Raw material type (natural or man-made fibers)

Fiber characteristics (mainly fineness length bulk dirt content)

Overall quality requirements

Price of the clothing

Service offered by the clothing supplier

Classification of card clothing

1Flexible clothings

2Semi-rigid clothings

3Metallic clothings

Flexible clothing

- Here hooks of round or oval wire set into elastic multiple-ply cloth

backings

- Each hook is bent to a U- shape and is formed with a knee that flexes

under bending load and return to its original position when the load is

removed

-In the flats the point density is in the range of 240-500 pointsinch

Fig Flexible clothing

Classification of card clothing

1Flexible clothings

2Semi-rigid clothings

3Metallic clothings

Flexible clothing

- Here hooks of round or oval wire set into elastic multiple-ply cloth

backings

- Each hook is bent to a U- shape and is formed with a knee that flexes

under bending load and return to its original position when the load is

removed

-In the flats the point density is in the range of 240-500 pointsinch

Fig Flexible clothing

Flexible clothing

- Here hooks of round or oval wire set into elastic multiple-ply cloth

backings

- Each hook is bent to a U- shape and is formed with a knee that flexes

under bending load and return to its original position when the load is

removed

-In the flats the point density is in the range of 240-500 pointsinch

Fig Flexible clothing

Semi-rigid Clothing

bull Here flat or round wires with sharp points are set in backings which

are less elastic than those of flexible clothings

bull More cloth layers and have hooks of flat wire without a knee or of

reinforced round wire with or without knee

bull These are found in flats

Fig Semi-rigid Clothing

Metallic Clothing

In manufacturing process a wire with round cross section is rolled

into a long strip comprising a rib to form a base of the wire and a thin

web forming portion for the teeth

This thin portion is stamped or punched so as to get thin serrated strip

called as saw tooth wire

These are found in licker-in main cylinder and doffer

Fig Forming the wire profile for metallic clothing

Metallic wire on cylinder amp Doffer

bull In comparison to the licker-in wire metallic wire on cylinder amp doffer

are much finer

bull The cylinder wire are much smaller in size compared to doffer wire

bull The pointsinch on cylinder wire are higher than the doffer wire

bull The thickness of the rib for doffer wire is more than that for cylinder

wire

bull The angle of leading edge for cylinder wire is more than that for doffer

wire

Comparison between flexible and Metallic wire clothing

Limitations of conventional revolving flat card clothed flexible wires

are

bull The conventional carding efficiency is vary much effected due to

frequent stoppages for stripping and grinding

bull Further the regularity of the sliver is much affected after every

stripping condition of the wire point increases the waste and neps

formation

bull Foundation of the flexible wire clothing is not rigid and fails to bare the

stress and strain caused by high speed so cannot be run at high speed

bull Reduction in stripping cycles-once in 2 or 3 days

bull No frequent grinding-only light grinding at an interval of 6 months on

3 shift basis

bull More production amp regularity of sliver is improved amp labour work is

reduced

bull NO neps formation due to better wire condition

bull Saving of good fibres Lesser variation in card sliver owing to reduced

stripping cycles

bull Card can run at high speed owing to rigid foundation of wires

bull Economic in long run

bull Less fibre holding power

bull It shows slightly higher fibre damage

bull High fly generation

bull Requires higher power consumption

bull Greater care in maintenance and attention owing closer gauging and

setting

bull It is difficult to replace the damaged wire portion only (Damaged

portion only can be replaced in flexible fillet clothing)

Necessity of stripping

bull During the carding process fibres and impurities become embedded in

the wires of the flats cylinder amp doffer which may reduce their

effectiveness of carding and increases the nep count in card sliver amp

finally affect the quality of the yarn

bull So stripping the dust fibres amp impurities from the card clothing is

essential to regain their efficiency

Stripping Roller This is a wooden roller mounted on steel shaft covered

with flexible wire fillet The roller is about 6 inch in dia and slightly

longer than the width of the cylinder

bull It has serious disadvantages of throwing a considerable amount of dustamp fly

from card clothing into the card room atmosphere

bull There by creating undesirable and unhealthy working condition amp spoils the

machinery and product

Developments of stripping

Following are some of the developments of stripping

method

1 Dustless stripper

2 Vacuum stripper

3 Continuous stripper

Dustless stripper is used exactly like plain stripper except that the fan is

connected to the suction fan

A carriage which supports two suction nozzles(one for cylinder

amp the other for doffer) is mounted above doffer and is conveyed across

the full width of the card by means of a traversing screw

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Metallic wire on cylinder amp Doffer

bull In comparison to the licker-in wire metallic wire on cylinder amp doffer

are much finer

bull The cylinder wire are much smaller in size compared to doffer wire

bull The pointsinch on cylinder wire are higher than the doffer wire

bull The thickness of the rib for doffer wire is more than that for cylinder

wire

bull The angle of leading edge for cylinder wire is more than that for doffer

wire

Comparison between flexible and Metallic wire clothing

Limitations of conventional revolving flat card clothed flexible wires

are

bull The conventional carding efficiency is vary much effected due to

frequent stoppages for stripping and grinding

bull Further the regularity of the sliver is much affected after every

stripping condition of the wire point increases the waste and neps

formation

bull Foundation of the flexible wire clothing is not rigid and fails to bare the

stress and strain caused by high speed so cannot be run at high speed

bull Reduction in stripping cycles-once in 2 or 3 days

bull No frequent grinding-only light grinding at an interval of 6 months on

3 shift basis

bull More production amp regularity of sliver is improved amp labour work is

reduced

bull NO neps formation due to better wire condition

bull Saving of good fibres Lesser variation in card sliver owing to reduced

stripping cycles

bull Card can run at high speed owing to rigid foundation of wires

bull Economic in long run

bull Less fibre holding power

bull It shows slightly higher fibre damage

bull High fly generation

bull Requires higher power consumption

bull Greater care in maintenance and attention owing closer gauging and

setting

bull It is difficult to replace the damaged wire portion only (Damaged

portion only can be replaced in flexible fillet clothing)

Necessity of stripping

bull During the carding process fibres and impurities become embedded in

the wires of the flats cylinder amp doffer which may reduce their

effectiveness of carding and increases the nep count in card sliver amp

finally affect the quality of the yarn

bull So stripping the dust fibres amp impurities from the card clothing is

essential to regain their efficiency

Stripping Roller This is a wooden roller mounted on steel shaft covered

with flexible wire fillet The roller is about 6 inch in dia and slightly

longer than the width of the cylinder

bull It has serious disadvantages of throwing a considerable amount of dustamp fly

from card clothing into the card room atmosphere

bull There by creating undesirable and unhealthy working condition amp spoils the

machinery and product

Developments of stripping

Following are some of the developments of stripping

method

1 Dustless stripper

2 Vacuum stripper

3 Continuous stripper

Dustless stripper is used exactly like plain stripper except that the fan is

connected to the suction fan

A carriage which supports two suction nozzles(one for cylinder

amp the other for doffer) is mounted above doffer and is conveyed across

the full width of the card by means of a traversing screw

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Comparison between flexible and Metallic wire clothing

Limitations of conventional revolving flat card clothed flexible wires

are

bull The conventional carding efficiency is vary much effected due to

frequent stoppages for stripping and grinding

bull Further the regularity of the sliver is much affected after every

stripping condition of the wire point increases the waste and neps

formation

bull Foundation of the flexible wire clothing is not rigid and fails to bare the

stress and strain caused by high speed so cannot be run at high speed

bull Reduction in stripping cycles-once in 2 or 3 days

bull No frequent grinding-only light grinding at an interval of 6 months on

3 shift basis

bull More production amp regularity of sliver is improved amp labour work is

reduced

bull NO neps formation due to better wire condition

bull Saving of good fibres Lesser variation in card sliver owing to reduced

stripping cycles

bull Card can run at high speed owing to rigid foundation of wires

bull Economic in long run

bull Less fibre holding power

bull It shows slightly higher fibre damage

bull High fly generation

bull Requires higher power consumption

bull Greater care in maintenance and attention owing closer gauging and

setting

bull It is difficult to replace the damaged wire portion only (Damaged

portion only can be replaced in flexible fillet clothing)

Necessity of stripping

bull During the carding process fibres and impurities become embedded in

the wires of the flats cylinder amp doffer which may reduce their

effectiveness of carding and increases the nep count in card sliver amp

finally affect the quality of the yarn

bull So stripping the dust fibres amp impurities from the card clothing is

essential to regain their efficiency

Stripping Roller This is a wooden roller mounted on steel shaft covered

with flexible wire fillet The roller is about 6 inch in dia and slightly

longer than the width of the cylinder

bull It has serious disadvantages of throwing a considerable amount of dustamp fly

from card clothing into the card room atmosphere

bull There by creating undesirable and unhealthy working condition amp spoils the

machinery and product

Developments of stripping

Following are some of the developments of stripping

method

1 Dustless stripper

2 Vacuum stripper

3 Continuous stripper

Dustless stripper is used exactly like plain stripper except that the fan is

connected to the suction fan

A carriage which supports two suction nozzles(one for cylinder

amp the other for doffer) is mounted above doffer and is conveyed across

the full width of the card by means of a traversing screw

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

bull Reduction in stripping cycles-once in 2 or 3 days

bull No frequent grinding-only light grinding at an interval of 6 months on

3 shift basis

bull More production amp regularity of sliver is improved amp labour work is

reduced

bull NO neps formation due to better wire condition

bull Saving of good fibres Lesser variation in card sliver owing to reduced

stripping cycles

bull Card can run at high speed owing to rigid foundation of wires

bull Economic in long run

bull Less fibre holding power

bull It shows slightly higher fibre damage

bull High fly generation

bull Requires higher power consumption

bull Greater care in maintenance and attention owing closer gauging and

setting

bull It is difficult to replace the damaged wire portion only (Damaged

portion only can be replaced in flexible fillet clothing)

Necessity of stripping

bull During the carding process fibres and impurities become embedded in

the wires of the flats cylinder amp doffer which may reduce their

effectiveness of carding and increases the nep count in card sliver amp

finally affect the quality of the yarn

bull So stripping the dust fibres amp impurities from the card clothing is

essential to regain their efficiency

Stripping Roller This is a wooden roller mounted on steel shaft covered

with flexible wire fillet The roller is about 6 inch in dia and slightly

longer than the width of the cylinder

bull It has serious disadvantages of throwing a considerable amount of dustamp fly

from card clothing into the card room atmosphere

bull There by creating undesirable and unhealthy working condition amp spoils the

machinery and product

Developments of stripping

Following are some of the developments of stripping

method

1 Dustless stripper

2 Vacuum stripper

3 Continuous stripper

Dustless stripper is used exactly like plain stripper except that the fan is

connected to the suction fan

A carriage which supports two suction nozzles(one for cylinder

amp the other for doffer) is mounted above doffer and is conveyed across

the full width of the card by means of a traversing screw

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

bull Less fibre holding power

bull It shows slightly higher fibre damage

bull High fly generation

bull Requires higher power consumption

bull Greater care in maintenance and attention owing closer gauging and

setting

bull It is difficult to replace the damaged wire portion only (Damaged

portion only can be replaced in flexible fillet clothing)

Necessity of stripping

bull During the carding process fibres and impurities become embedded in

the wires of the flats cylinder amp doffer which may reduce their

effectiveness of carding and increases the nep count in card sliver amp

finally affect the quality of the yarn

bull So stripping the dust fibres amp impurities from the card clothing is

essential to regain their efficiency

Stripping Roller This is a wooden roller mounted on steel shaft covered

with flexible wire fillet The roller is about 6 inch in dia and slightly

longer than the width of the cylinder

bull It has serious disadvantages of throwing a considerable amount of dustamp fly

from card clothing into the card room atmosphere

bull There by creating undesirable and unhealthy working condition amp spoils the

machinery and product

Developments of stripping

Following are some of the developments of stripping

method

1 Dustless stripper

2 Vacuum stripper

3 Continuous stripper

Dustless stripper is used exactly like plain stripper except that the fan is

connected to the suction fan

A carriage which supports two suction nozzles(one for cylinder

amp the other for doffer) is mounted above doffer and is conveyed across

the full width of the card by means of a traversing screw

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Necessity of stripping

bull During the carding process fibres and impurities become embedded in

the wires of the flats cylinder amp doffer which may reduce their

effectiveness of carding and increases the nep count in card sliver amp

finally affect the quality of the yarn

bull So stripping the dust fibres amp impurities from the card clothing is

essential to regain their efficiency

Stripping Roller This is a wooden roller mounted on steel shaft covered

with flexible wire fillet The roller is about 6 inch in dia and slightly

longer than the width of the cylinder

bull It has serious disadvantages of throwing a considerable amount of dustamp fly

from card clothing into the card room atmosphere

bull There by creating undesirable and unhealthy working condition amp spoils the

machinery and product

Developments of stripping

Following are some of the developments of stripping

method

1 Dustless stripper

2 Vacuum stripper

3 Continuous stripper

Dustless stripper is used exactly like plain stripper except that the fan is

connected to the suction fan

A carriage which supports two suction nozzles(one for cylinder

amp the other for doffer) is mounted above doffer and is conveyed across

the full width of the card by means of a traversing screw

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Stripping Roller This is a wooden roller mounted on steel shaft covered

with flexible wire fillet The roller is about 6 inch in dia and slightly

longer than the width of the cylinder

bull It has serious disadvantages of throwing a considerable amount of dustamp fly

from card clothing into the card room atmosphere

bull There by creating undesirable and unhealthy working condition amp spoils the

machinery and product

Developments of stripping

Following are some of the developments of stripping

method

1 Dustless stripper

2 Vacuum stripper

3 Continuous stripper

Dustless stripper is used exactly like plain stripper except that the fan is

connected to the suction fan

A carriage which supports two suction nozzles(one for cylinder

amp the other for doffer) is mounted above doffer and is conveyed across

the full width of the card by means of a traversing screw

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

bull It has serious disadvantages of throwing a considerable amount of dustamp fly

from card clothing into the card room atmosphere

bull There by creating undesirable and unhealthy working condition amp spoils the

machinery and product

Developments of stripping

Following are some of the developments of stripping

method

1 Dustless stripper

2 Vacuum stripper

3 Continuous stripper

Dustless stripper is used exactly like plain stripper except that the fan is

connected to the suction fan

A carriage which supports two suction nozzles(one for cylinder

amp the other for doffer) is mounted above doffer and is conveyed across

the full width of the card by means of a traversing screw

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Dustless stripper is used exactly like plain stripper except that the fan is

connected to the suction fan

A carriage which supports two suction nozzles(one for cylinder

amp the other for doffer) is mounted above doffer and is conveyed across

the full width of the card by means of a traversing screw

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

A carriage which supports two suction nozzles(one for cylinder

amp the other for doffer) is mounted above doffer and is conveyed across

the full width of the card by means of a traversing screw

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

This is a nozzle and suction type of stripping

Here nozzle keeps continuously sucking the fibres from beneath the

cylinder and feeds back beneath the lap that is being fed to the mc for

being worked again

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Objects

As a card operates the action of fibres and dirt with it gradually wear

the points of wire causing them to become poor cleaning point

The purpose of card grinding is to maintain the card clothing in a sharp

condition

Types of Grinding Rollers

Two types of Grinding Roller are available

i) Long roll grinder

ii) Traverse Grinder

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

It is a steel shaft about 7 inch in dia and 42 to 47 inch long The roll is

carried on a shaft about 1 125 in dia The grinder roll is entirely

covered with emery fillet

This roller is equipped with a traverse motion to give the roller a short

endwise traverse for uniform grinding

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

bull It consists of a narrow roll 35rsquorsquo wide amp 7rsquorsquo in dia Mounted on a hollow

steel shell of 46rsquorsquo or 51rsquorsquo long suitable for 40rsquorsquo or 45rsquorsquo wide cards

bull A long traverse from one end to the other end of the card is given

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

A roller similar to the stripping roller but having long coarse widely

displaced needle points is used in a manner similar to the stripping roller

once in about a week and when every grinding is done

This removes the rough barbs as well as cleans out the embedded dust

fine seed and leaf particles

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

1 Fibres remain comparatively in bigger

size

Fibres remain comparatively in small

size

2 Additional costs in terms of scutcher

operation lap transportation card

stoppages and lap wastages

Less additional costs required as

compared to lap feeding

3 From productivity point of view LF

carding is not advantageous than of CF

From productivity point of view CF

carding is advantageous than that of LF

4 Variation in feed the material may be

there

A mechanism to feed the material at

uniform weight per unit length amp width

5 Stoppage due to lap changes Direct automatic feed to card increases

BR working efficiency

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Sr

No

Conventional method of feeding

material to card

Modern method of feeding material to

card

6 Extra labour f or lap transportation Elimination of Man power required

during scutcher operation

7 Compression of fibres in the lap poses

problem during opening in carding

No problem during opening in carding

8 More wastes due to lap tail amp damages Processing of rejected lap is avoided

9 Irregularity of sliver weight due to

improper unwinding of laps

Elimination of irregularities due to

double laps lap splitting lap piecing

10 Reduction of 1 CV in chute feed

carding system

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Fig Setting positions on the card

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

AManufacturer Rieter Truumltzschler Marzoli

Model C 60 TC 03 C 601N

Working width

[mm] 1 500 1 055 1 026

Licker-in [empty] 180180253 3 x 1725 1 x 350

Licker-in rpm 935 - 2 306 930 - 2 700 640 - 1 640

Main cylinder [empty] 814 mm 1 287 mm 1 290 mm

Main cylinder rpm 600 - 900 300 - 560 up to 650

Integrated grinding IGS-classic No by hand only No by hand only

Doffer [empty] 680 mm 700 mm 706 mm

Delivery [mmin]

300 400

mechanically 400 500 with IDF up to 400

Flat bars 79 84 75

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

In working position 27 30 25

Flat direction backward backward backward

Power required for

75 kgh 15 KWh 18 KWh -

Pressure [bar] 6 7 6

Leveling

Medium and long

term Medium and long term

Medium and long

term

Drafting module

SB (unleveled) max

draft of 5

IDF (leveled) max

draft of 3

max 800 mmin

delivery

max 500 mmin

delivery

RSB (leveled) max

draft of 5

IDF-R (rectangular

can) max draft of 3

max 700 mmin

delivery

max 500 mmin

delivery

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Patchy web

Singles

Sagging web

High card waste

Low nep-removal efficiency

Higher U of sliver

Bulky sliver

Higher breaks

Patchy web

May be due to loading on the cylinder damaged or pressed wire

points waste accumulation below cylinder under casing or defective

under casing

Singles

May be due to lap licking less feed in chutes part of carded web

getting sucked by the waste extractor damaged doffer wire and direct air

currents hitting the web

Sagging web

May be due to insufficient tension draft very high humidity

worn out key in the calendar roller gears heavy material fed to card and

inadequate calendar roller pressure

High card waste

High card wastes are due to damaged under casings higher flat

speed wider front plate setting closer setting of flats and higher

pressure in suction unit and fibres getting ruptured

Low nep-removal efficiency

Blunt wire points too wide setting between feed plate and licker-in

uneven settings burrs in front plate back plate and card wires of coarse type are

the main reasons for low nep-removal efficiency

Higher U of sliver

Worn out parts eccentric movement in coiler calendar or table calendar

rollers uneven feed waste accumulation in material patch improper settings and

loading of fibres on cylinder and flats are some of the reasons for higher U of

card sliver

Bulky sliver

Slivers become bulky by use of trumpet of a very large size and lower

calendar pressure

Higher breaks

Very small trumpet worn out trumpet uneven sliver with bunches of

fibres worn out gears damaged clothing air currents disturbing the web improper

temperature and humidity and a very high tension-draft causes higher breakages of

web and sliver

Objectives

To study various developments in licker-in region

To study Shirley modification system

To study setting of deflector plate

To study fibre retriever

Objectives

To unwind the lap and pass the sheet of cotton at a constant rate

without any uncontrolled stretching

To bring about a preliminary opening of cotton into very small

tufts for effective carding by the cylinder and flats

To remove impurities like motes sand etc to clean the cotton

To transfer the cotton to the main cylinder and distribute the fibres

as evenly as possible both transversely and longitudinally on the

cylinder surface

Major developments takes place wrt

1] Improve the opening of tuft at high rate of feed in high

production cards

2] Distribute the tuft as evenly as possible on the cylinder

3] Extract max trash with minimum loss of spinnable fibres

To achieve first objective

- Licker-in speed is increased in the range of 1150-1800 rpm

- Introduced 23 licker-in for gradual opening of tuft eg Ms

Ingolstadt in their super card KU 12 has incorporated three licker-in

roller which resolve at 920 1350 and 1800 rpm respectively

Fig Shows 3-licker-in

arrangement

To achieve second objective

- Ms Marzoli has introduced a bottom cylinder of 256mm dia

clothed with special wires at the bottom of licker-in and near the cylinder

in their high production card C300

- Ms Nagoya introduced card analyzer or uniopener

To achieve third objective

- mote knives placed in the reverse or inverted

- Ms Mafatlal Engineering introduced comb bar and waste

control knife

Research done by Shirley institute

The essential changes in the cleaning region are

1 The replacement of conventional mote knives by a deflector

plate which is provided under side of the feed plate

2 The taker-in grid

replaced by shorter grid and setting

between grid and taker-in is made

wider than conventional card

3 A safety guard is fitted

under the feed plate to cover the

exposed portion of the taker-in

A - Deflecting plate B - Undercasing

B1 ndash Grid CC1 ndash Making-up piece

B2 - Perforations on the undercasing

D ndash Guard EF ndash Setting plate

Deflector plate consist of mild steel strips of 316rdquo thick

The operation edge of the plate nearest to the taker-in is beveled at

45deg and is set 18rdquo to 316rdquo from the taker-in

The setting between taker-in grid to the taker-in nearest cylinder

should be frac14rdquo to 516rdquo

The setting between the nose of the taker-in grid and taker-in can be

varied wrt amount of lint rejected

Setting frac14rdquo to frac12rdquo - more lint rejected

Shorter the grid more lint is rejected

For short staple cotton - 8rdquo grid

For medium staple cotton - 7rdquo grid

For long staple cotton - 6rdquo grid

- Ms CrosRol Ltd

Introduced fiber retriever

- Modification in under

screen region

- 1 waste reduced

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Low nep-removal efficiency

Blunt wire points too wide setting between feed plate and licker-in

uneven settings burrs in front plate back plate and card wires of coarse type are

the main reasons for low nep-removal efficiency

Higher U of sliver

Worn out parts eccentric movement in coiler calendar or table calendar

rollers uneven feed waste accumulation in material patch improper settings and

loading of fibres on cylinder and flats are some of the reasons for higher U of

card sliver

Bulky sliver

Slivers become bulky by use of trumpet of a very large size and lower

calendar pressure

Higher breaks

Very small trumpet worn out trumpet uneven sliver with bunches of

fibres worn out gears damaged clothing air currents disturbing the web improper

temperature and humidity and a very high tension-draft causes higher breakages of

web and sliver

Objectives

To study various developments in licker-in region

To study Shirley modification system

To study setting of deflector plate

To study fibre retriever

Objectives

To unwind the lap and pass the sheet of cotton at a constant rate

without any uncontrolled stretching

To bring about a preliminary opening of cotton into very small

tufts for effective carding by the cylinder and flats

To remove impurities like motes sand etc to clean the cotton

To transfer the cotton to the main cylinder and distribute the fibres

as evenly as possible both transversely and longitudinally on the

cylinder surface

Major developments takes place wrt

1] Improve the opening of tuft at high rate of feed in high

production cards

2] Distribute the tuft as evenly as possible on the cylinder

3] Extract max trash with minimum loss of spinnable fibres

To achieve first objective

- Licker-in speed is increased in the range of 1150-1800 rpm

- Introduced 23 licker-in for gradual opening of tuft eg Ms

Ingolstadt in their super card KU 12 has incorporated three licker-in

roller which resolve at 920 1350 and 1800 rpm respectively

Fig Shows 3-licker-in

arrangement

To achieve second objective

- Ms Marzoli has introduced a bottom cylinder of 256mm dia

clothed with special wires at the bottom of licker-in and near the cylinder

in their high production card C300

- Ms Nagoya introduced card analyzer or uniopener

To achieve third objective

- mote knives placed in the reverse or inverted

- Ms Mafatlal Engineering introduced comb bar and waste

control knife

Research done by Shirley institute

The essential changes in the cleaning region are

1 The replacement of conventional mote knives by a deflector

plate which is provided under side of the feed plate

2 The taker-in grid

replaced by shorter grid and setting

between grid and taker-in is made

wider than conventional card

3 A safety guard is fitted

under the feed plate to cover the

exposed portion of the taker-in

A - Deflecting plate B - Undercasing

B1 ndash Grid CC1 ndash Making-up piece

B2 - Perforations on the undercasing

D ndash Guard EF ndash Setting plate

Deflector plate consist of mild steel strips of 316rdquo thick

The operation edge of the plate nearest to the taker-in is beveled at

45deg and is set 18rdquo to 316rdquo from the taker-in

The setting between taker-in grid to the taker-in nearest cylinder

should be frac14rdquo to 516rdquo

The setting between the nose of the taker-in grid and taker-in can be

varied wrt amount of lint rejected

Setting frac14rdquo to frac12rdquo - more lint rejected

Shorter the grid more lint is rejected

For short staple cotton - 8rdquo grid

For medium staple cotton - 7rdquo grid

For long staple cotton - 6rdquo grid

- Ms CrosRol Ltd

Introduced fiber retriever

- Modification in under

screen region

- 1 waste reduced

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Objectives

To study various developments in licker-in region

To study Shirley modification system

To study setting of deflector plate

To study fibre retriever

Objectives

To unwind the lap and pass the sheet of cotton at a constant rate

without any uncontrolled stretching

To bring about a preliminary opening of cotton into very small

tufts for effective carding by the cylinder and flats

To remove impurities like motes sand etc to clean the cotton

To transfer the cotton to the main cylinder and distribute the fibres

as evenly as possible both transversely and longitudinally on the

cylinder surface

Major developments takes place wrt

1] Improve the opening of tuft at high rate of feed in high

production cards

2] Distribute the tuft as evenly as possible on the cylinder

3] Extract max trash with minimum loss of spinnable fibres

To achieve first objective

- Licker-in speed is increased in the range of 1150-1800 rpm

- Introduced 23 licker-in for gradual opening of tuft eg Ms

Ingolstadt in their super card KU 12 has incorporated three licker-in

roller which resolve at 920 1350 and 1800 rpm respectively

Fig Shows 3-licker-in

arrangement

To achieve second objective

- Ms Marzoli has introduced a bottom cylinder of 256mm dia

clothed with special wires at the bottom of licker-in and near the cylinder

in their high production card C300

- Ms Nagoya introduced card analyzer or uniopener

To achieve third objective

- mote knives placed in the reverse or inverted

- Ms Mafatlal Engineering introduced comb bar and waste

control knife

Research done by Shirley institute

The essential changes in the cleaning region are

1 The replacement of conventional mote knives by a deflector

plate which is provided under side of the feed plate

2 The taker-in grid

replaced by shorter grid and setting

between grid and taker-in is made

wider than conventional card

3 A safety guard is fitted

under the feed plate to cover the

exposed portion of the taker-in

A - Deflecting plate B - Undercasing

B1 ndash Grid CC1 ndash Making-up piece

B2 - Perforations on the undercasing

D ndash Guard EF ndash Setting plate

Deflector plate consist of mild steel strips of 316rdquo thick

The operation edge of the plate nearest to the taker-in is beveled at

45deg and is set 18rdquo to 316rdquo from the taker-in

The setting between taker-in grid to the taker-in nearest cylinder

should be frac14rdquo to 516rdquo

The setting between the nose of the taker-in grid and taker-in can be

varied wrt amount of lint rejected

Setting frac14rdquo to frac12rdquo - more lint rejected

Shorter the grid more lint is rejected

For short staple cotton - 8rdquo grid

For medium staple cotton - 7rdquo grid

For long staple cotton - 6rdquo grid

- Ms CrosRol Ltd

Introduced fiber retriever

- Modification in under

screen region

- 1 waste reduced

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Objectives

To unwind the lap and pass the sheet of cotton at a constant rate

without any uncontrolled stretching

To bring about a preliminary opening of cotton into very small

tufts for effective carding by the cylinder and flats

To remove impurities like motes sand etc to clean the cotton

To transfer the cotton to the main cylinder and distribute the fibres

as evenly as possible both transversely and longitudinally on the

cylinder surface

Major developments takes place wrt

1] Improve the opening of tuft at high rate of feed in high

production cards

2] Distribute the tuft as evenly as possible on the cylinder

3] Extract max trash with minimum loss of spinnable fibres

To achieve first objective

- Licker-in speed is increased in the range of 1150-1800 rpm

- Introduced 23 licker-in for gradual opening of tuft eg Ms

Ingolstadt in their super card KU 12 has incorporated three licker-in

roller which resolve at 920 1350 and 1800 rpm respectively

Fig Shows 3-licker-in

arrangement

To achieve second objective

- Ms Marzoli has introduced a bottom cylinder of 256mm dia

clothed with special wires at the bottom of licker-in and near the cylinder

in their high production card C300

- Ms Nagoya introduced card analyzer or uniopener

To achieve third objective

- mote knives placed in the reverse or inverted

- Ms Mafatlal Engineering introduced comb bar and waste

control knife

Research done by Shirley institute

The essential changes in the cleaning region are

1 The replacement of conventional mote knives by a deflector

plate which is provided under side of the feed plate

2 The taker-in grid

replaced by shorter grid and setting

between grid and taker-in is made

wider than conventional card

3 A safety guard is fitted

under the feed plate to cover the

exposed portion of the taker-in

A - Deflecting plate B - Undercasing

B1 ndash Grid CC1 ndash Making-up piece

B2 - Perforations on the undercasing

D ndash Guard EF ndash Setting plate

Deflector plate consist of mild steel strips of 316rdquo thick

The operation edge of the plate nearest to the taker-in is beveled at

45deg and is set 18rdquo to 316rdquo from the taker-in

The setting between taker-in grid to the taker-in nearest cylinder

should be frac14rdquo to 516rdquo

The setting between the nose of the taker-in grid and taker-in can be

varied wrt amount of lint rejected

Setting frac14rdquo to frac12rdquo - more lint rejected

Shorter the grid more lint is rejected

For short staple cotton - 8rdquo grid

For medium staple cotton - 7rdquo grid

For long staple cotton - 6rdquo grid

- Ms CrosRol Ltd

Introduced fiber retriever

- Modification in under

screen region

- 1 waste reduced

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Major developments takes place wrt

1] Improve the opening of tuft at high rate of feed in high

production cards

2] Distribute the tuft as evenly as possible on the cylinder

3] Extract max trash with minimum loss of spinnable fibres

To achieve first objective

- Licker-in speed is increased in the range of 1150-1800 rpm

- Introduced 23 licker-in for gradual opening of tuft eg Ms

Ingolstadt in their super card KU 12 has incorporated three licker-in

roller which resolve at 920 1350 and 1800 rpm respectively

Fig Shows 3-licker-in

arrangement

To achieve second objective

- Ms Marzoli has introduced a bottom cylinder of 256mm dia

clothed with special wires at the bottom of licker-in and near the cylinder

in their high production card C300

- Ms Nagoya introduced card analyzer or uniopener

To achieve third objective

- mote knives placed in the reverse or inverted

- Ms Mafatlal Engineering introduced comb bar and waste

control knife

Research done by Shirley institute

The essential changes in the cleaning region are

1 The replacement of conventional mote knives by a deflector

plate which is provided under side of the feed plate

2 The taker-in grid

replaced by shorter grid and setting

between grid and taker-in is made

wider than conventional card

3 A safety guard is fitted

under the feed plate to cover the

exposed portion of the taker-in

A - Deflecting plate B - Undercasing

B1 ndash Grid CC1 ndash Making-up piece

B2 - Perforations on the undercasing

D ndash Guard EF ndash Setting plate

Deflector plate consist of mild steel strips of 316rdquo thick

The operation edge of the plate nearest to the taker-in is beveled at

45deg and is set 18rdquo to 316rdquo from the taker-in

The setting between taker-in grid to the taker-in nearest cylinder

should be frac14rdquo to 516rdquo

The setting between the nose of the taker-in grid and taker-in can be

varied wrt amount of lint rejected

Setting frac14rdquo to frac12rdquo - more lint rejected

Shorter the grid more lint is rejected

For short staple cotton - 8rdquo grid

For medium staple cotton - 7rdquo grid

For long staple cotton - 6rdquo grid

- Ms CrosRol Ltd

Introduced fiber retriever

- Modification in under

screen region

- 1 waste reduced

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

To achieve second objective

- Ms Marzoli has introduced a bottom cylinder of 256mm dia

clothed with special wires at the bottom of licker-in and near the cylinder

in their high production card C300

- Ms Nagoya introduced card analyzer or uniopener

To achieve third objective

- mote knives placed in the reverse or inverted

- Ms Mafatlal Engineering introduced comb bar and waste

control knife

Research done by Shirley institute

The essential changes in the cleaning region are

1 The replacement of conventional mote knives by a deflector

plate which is provided under side of the feed plate

2 The taker-in grid

replaced by shorter grid and setting

between grid and taker-in is made

wider than conventional card

3 A safety guard is fitted

under the feed plate to cover the

exposed portion of the taker-in

A - Deflecting plate B - Undercasing

B1 ndash Grid CC1 ndash Making-up piece

B2 - Perforations on the undercasing

D ndash Guard EF ndash Setting plate

Deflector plate consist of mild steel strips of 316rdquo thick

The operation edge of the plate nearest to the taker-in is beveled at

45deg and is set 18rdquo to 316rdquo from the taker-in

The setting between taker-in grid to the taker-in nearest cylinder

should be frac14rdquo to 516rdquo

The setting between the nose of the taker-in grid and taker-in can be

varied wrt amount of lint rejected

Setting frac14rdquo to frac12rdquo - more lint rejected

Shorter the grid more lint is rejected

For short staple cotton - 8rdquo grid

For medium staple cotton - 7rdquo grid

For long staple cotton - 6rdquo grid

- Ms CrosRol Ltd

Introduced fiber retriever

- Modification in under

screen region

- 1 waste reduced

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

To achieve third objective

- mote knives placed in the reverse or inverted

- Ms Mafatlal Engineering introduced comb bar and waste

control knife

Research done by Shirley institute

The essential changes in the cleaning region are

1 The replacement of conventional mote knives by a deflector

plate which is provided under side of the feed plate

2 The taker-in grid

replaced by shorter grid and setting

between grid and taker-in is made

wider than conventional card

3 A safety guard is fitted

under the feed plate to cover the

exposed portion of the taker-in

A - Deflecting plate B - Undercasing

B1 ndash Grid CC1 ndash Making-up piece

B2 - Perforations on the undercasing

D ndash Guard EF ndash Setting plate

Deflector plate consist of mild steel strips of 316rdquo thick

The operation edge of the plate nearest to the taker-in is beveled at

45deg and is set 18rdquo to 316rdquo from the taker-in

The setting between taker-in grid to the taker-in nearest cylinder

should be frac14rdquo to 516rdquo

The setting between the nose of the taker-in grid and taker-in can be

varied wrt amount of lint rejected

Setting frac14rdquo to frac12rdquo - more lint rejected

Shorter the grid more lint is rejected

For short staple cotton - 8rdquo grid

For medium staple cotton - 7rdquo grid

For long staple cotton - 6rdquo grid

- Ms CrosRol Ltd

Introduced fiber retriever

- Modification in under

screen region

- 1 waste reduced

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Research done by Shirley institute

The essential changes in the cleaning region are

1 The replacement of conventional mote knives by a deflector

plate which is provided under side of the feed plate

2 The taker-in grid

replaced by shorter grid and setting

between grid and taker-in is made

wider than conventional card

3 A safety guard is fitted

under the feed plate to cover the

exposed portion of the taker-in

A - Deflecting plate B - Undercasing

B1 ndash Grid CC1 ndash Making-up piece

B2 - Perforations on the undercasing

D ndash Guard EF ndash Setting plate

Deflector plate consist of mild steel strips of 316rdquo thick

The operation edge of the plate nearest to the taker-in is beveled at

45deg and is set 18rdquo to 316rdquo from the taker-in

The setting between taker-in grid to the taker-in nearest cylinder

should be frac14rdquo to 516rdquo

The setting between the nose of the taker-in grid and taker-in can be

varied wrt amount of lint rejected

Setting frac14rdquo to frac12rdquo - more lint rejected

Shorter the grid more lint is rejected

For short staple cotton - 8rdquo grid

For medium staple cotton - 7rdquo grid

For long staple cotton - 6rdquo grid

- Ms CrosRol Ltd

Introduced fiber retriever

- Modification in under

screen region

- 1 waste reduced

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Deflector plate consist of mild steel strips of 316rdquo thick

The operation edge of the plate nearest to the taker-in is beveled at

45deg and is set 18rdquo to 316rdquo from the taker-in

The setting between taker-in grid to the taker-in nearest cylinder

should be frac14rdquo to 516rdquo

The setting between the nose of the taker-in grid and taker-in can be

varied wrt amount of lint rejected

Setting frac14rdquo to frac12rdquo - more lint rejected

Shorter the grid more lint is rejected

For short staple cotton - 8rdquo grid

For medium staple cotton - 7rdquo grid

For long staple cotton - 6rdquo grid

- Ms CrosRol Ltd

Introduced fiber retriever

- Modification in under

screen region

- 1 waste reduced

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

- Ms CrosRol Ltd

Introduced fiber retriever

- Modification in under

screen region

- 1 waste reduced

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Questions

Enlist the modernasation in licker-in

Explain working of fiber retriever

Explain Shirley modification

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Questions

1 Enlist licker-in region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist licker-in region developments in Crosrol Mark-4 High

production card

3 Enlist licker-in region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist licker-in region developments in Rieters C-4 High production

card

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Objectives

To study various developments in carding zone

To study developments in cylinder back and front zone

To study card master

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Developments in carding zone cylinder zone takes place wrt

- Prepare the tuft before the entry of flat region in order to

increase the life of flat clothing amp even distribution of tuft on cylinder

- Improve carding effect of the flats to match with heavy feed

- Improve parallelisation and removal of further impurities before

the transfer of fibers to the doffer

- reduce the waste

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

1] Improvement in cylinder construction

Cylinder must be withstand stresses and strain generated due to high

speed and extra weight of metallic clothing

All cylinders are provided with ball-bearings and dynamically

balanced

In Ingolstandt card cylinder width increase upto 15 times to cope up

thick feed

In Cros Rolverga MK4 card cylinder dia Reduced by 20 to add

stability and strength

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

2] Development in cylinder back zone

Development wrt increase the life of flat tops and prepere the tuft

for better carding at flat zone

The system offered by Viking Viking 200 and Viking 400

For back carding zone Viking 200 pre-carding segment and For front

carding zone Viking 400 post-carding segment

Unique Features

- The segment are made up of precision punched teeth sheet

which are hardened polished and assembled into carding segment of

around 40rdquo long and 32mm width

- The teeth surface of the carding segment is cylindrical to fit into

the radius of the cylinder thus offering maximum carding surface

Viking 200 pre-carding segment

width 64mm teeth density 60 pointssqinch

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

3] Developments in cylinder flat zone

Development wrt

i] increase the effectiveness of flats

ii] reduce flat waste

Wrt first objective

In SACM card running the flats in opposite direction

Adv - clean flats at delivery end of cylinder with more efficient

carding and cleaning

- Choking due to waste avoided

Wrt second objective

- Stationery carding surface in place of flats for reducing flat

waste

- But it will more applicable for processing synthetic fiber

- Ms John Hollingsworth develop card master of stationery flats

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Consist of four strong stationery aluminum plates with metallic

clothing

Providing greater surface than revolving flats

Each plate is interchangeable in any position on a same or other card

of same width and cylinder dia

Advantages

- Weight of card reduced by 320 Kg

- Reduced maintenance due to lock of moving parts

- No flat waste

- Provide max carding area

- Improves carding quality

- Long life since they can be ground

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

4] Developments in cylinder front zone

Objectives i] to improve the parallelization of fiber

ii] to extract the waste

To achieve first objective Viking 400 post-carding segment developed

- consist of four teeth segment total width of 128mm and teeth

density 150 pointssqinch

- mounted on doffer side of cylinder

To achieve second objective Trash Master TM 2000 developed

Continuehelliphellip

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Questions

Enlist the modernasation in cylinder front zone

Explain working of card master

Enlist the modernasation in cylinder back zone

Which developments takes place in carding cylinder

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Questions

1 Enlist carding region developments in Trutschlerrsquos Exact Card DK-

740 High production card

2 Enlist carding region developments in Crosrol Mark-4 High

production card

3 Enlist carding region developments in Ingolstadt Super Card KV-12

High production card

4 Enlist carding region developments in Rieters C-4 High production

card

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Objectives

To study trash master

To study various attachment in carding

To study control of waste in carding

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Trash Master TM 2000

- Introduced by Ms Hollingsworth

- Removal of vegetable matter trash short fly sticky particles

micro-dust and fused man-made fibers

- A special knife is set to the cylinder wire

- Requires 165msup3 air or 2 millibar low pressure

Advantages

- optimum removal of vegetable matter trash short fly sticky

particles micro-dust and fused man-made fibers

- improve yarn quality due to elimination of impurities

- Reduced cleaning of OE spinning rotor

- Lower card room dust levels

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Doffing Devices

- Improved doffer comb

- Roller doffing device

- Doffing and cleaning devices

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Introduction

Licker-in waste

- Role of air currents

- Modificationattachment to cards

- Speed and setting

Flat waste

Cylinder under casing waste

Atmospheric condition

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Questions

What are different attachments in the carding

Explain working of trash master

How can you control card waste

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Objectives

To study need of autoleveller

To study classification of autoleveller

To study working principle of autoleveller

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Careful control of sliver uniformity is necessary in the spinning

process to minimize the production of streaky fabrics waste of raw

material and to waste of production time

Limitations of traditional methods of controlling sliver uniformity

Need for Autoleveller

Continuous checking of sliver weight together with automatic

correction of sliver weight variation at card is necessary

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Advantage of installing autoleveller at card draw frame

They control the thickness of individual slivers

They are followed by greater no of doublings

They are generally cheaper

Classification of autoleveller

1] Mechanical system of control

2] Electronic control

Control systems are classified into

1] Open loop

2] Closed loop

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Open loop

- Variation is corrected in draft zone by varying speed of OP

rollers (on card) or IP rollers (on DF)

- Correction follows measurement so there is no check that

correction was correctly applied

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Closed loop

- Variations corrected in draft zone by varying speed of delivery

rollers

- Correction precedes measurement so system check that

lsquocorrectionrsquo was correctly applied

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Working principle

Measurement of sliver variation

Correction rate and sliver variation

Correction rate and delivery speed

Types

Long term autoleveller [LTAL]

Short term autoleveller [STAL]

Short term autoleveller and dual

autoleveller

Fig Mechanical Autolevelling System

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

They are classified as follows

Very short variations up to 25cm

Short term variations from 25cm to 25m

Medium term variations from 25m to 250 m

Very long variations more than 250 m

Types

Long term autolevelling UCC-L Model L

Medium term autolevelling USTER-M controller

Short term autolevelling UCC-S

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Limitations

The Uster M- controller is suitable for every bright fiber

Influences of color lustre staple fiber material as well as that of dust and

finishing material deposits are eliminated by the automatic sensitivity

adjuster as is the reflection of card clothing

But when the dark

staple fibers are processed

[eg Heavy blue black] the

Uster M- controller has to

be switched off

Advantages

- Reduction of required test

- Improved carding

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

FigShort term autoleveller

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Questions

What are need of autoleveller

What are the different types of autoleveller

Tell me the principles of autoleveller

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Objectives

To study fibre neps and their assessment

To study dust and waste extraction system in carding

To study improved suction system in carding

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Neps are small entanglements or knots of fibers

In general two types of neps can be distinguished fiber neps and seedcoat

neps that is small knots that consist only of fibers and others containing

foreign particles such as husk seed or leaf fragments

Fiber neps predominate particularly fiber neps having a core mainly of

immature and dead fibers

Neps generated due to Fiber fineness picking hard ginning

Based on Uster Technologies Inc amount of neps per gram in 100 cotton

bales

up to 150 = very low

150-250 = low

250-350 = average

350-450 = high

above 550 = very high

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Classification of Neps

For cotton fiber there are five types of Neps These are ndash

Process Neps Commonly produced by faulty carding or up to

spinning yarn

Mixed Neps Fibres tangle around a foreign materials For

instance ndash Grit

Immature Neps Generally form by processing immature fibre

Homogeneous Dead Neps A tangle of nearly all dead fibres

Fuzz Neps A fault of short fuzz fibers

Count of Neps

Nep count is the no of neps per 100 square inches of card web

forming ( a standerd hank of sliver of 12 NE on a 40 inch wide card)

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

How To Measure Assessment the Count of Neps

At first a web is collected from the card placed on a 10 inch times 10

inch black board Then the neps are counted and the no of neps found is

corrected fro any difference in hank or card width

Mathematically Nep Count n = m times 100 [ m = no of neps per inch

square card web]

Modern Method of Neps Assessment

With the help of AFIS

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Necessity

- To meet the rigid environmental protection regulations of

advanced countries

- The control and removal of dust also reduces dust generations

on the machines following the cards

- The yarn quality is also improved

- The efficiency of rotor spinning is improved

To achieve this necessity

- Shirley institute develop Shirley pressure point exhaust system

- Improved waste suction system

- Internal suction system

- Under card waste removal system

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Fig Shirley Pressure Point Exhaust System

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Questions

What is neps

How can you asses the neps

Tell me about dust and waste extraction system in carding

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Objectives

To study microprocessor used in carding

Summary of unit

Assignment

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Improved waste suction system

Features

- All the high pressure points must be enclosed

- Provision to segregate upper card waste from under card waste

- Continues removal of dust by a central suction system

- Intermitted blowing system for removal of under card waste

- Dead spots should be eliminated

- Complete enclosure of card

- System to recycle the waste

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Internal Suction system

The integral fan for internal suction creates a vacuum with in the

outer shell Thus no dust from the card escapes into the workroom

The suction is very effective in the removal or fly waste dust and

micro dust which are released during carding

Dust and wastes are removed at all points of occurrence feed

flat entry flat strips web delivery and waste chamber under the card

The internal suction operates continuously there by maintaining

constant aerodynamic conditions in the card

The exhaust air is conveyed to air conditioning system The

amount of exhaust air is 2300 m3h per card

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Under card waste removal system

The under card waste are transferred by programmed periodic

blasts of compressed air into the vicinity of a suction hood and collected

in the rear most filter of the two filters built into the outer shell

The over card wastes including flat strips are collected in the

foremost filter

The intermittently acting central suction system

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Quality Assurance MIS

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Summary

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

Questions

What is MIS

What improvements are made in carding suction system

What improvements are made in waste suction system

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

1 Enlist modern developments in Trutschlerrsquos Exact Card DK-740

High production card

2 Enlist modern developments in Crosrol Mark-4 High production

card

3 Enlist modern developments in Ingolstadt Super Card KV-12 High

production card

4 Enlist modern developments in Rieters C-4 High production card

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

1 Explain necessity amp objects of carding mc

2 Explain construction amp working of carding mc

3 Elaborate on flat actions and carding force

4 Elaborate on types of card clothing

5 What are the objects of taker-in region Explain with diagram

6 What are the objects of carding region Explain with diagram

7 Explain stripping grinding and burnishing operations

8 Explain various settings of carding amp its effect on yarn quality

9 What are the factors affecting fibre transfer at card Explain

10 Explain causes for Carding faults and its remedies

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt

1 What is autolevelling

2 Explain different types of autoleveller with their advantages and

disadvantages

3 How the card waste is control

4 Explain the modern developments in card

5 The surface speed of coiler calender is calculated and found to be 40

mtsmin If the linear density of the sliver is 42 ktex (42 kgkm)

what is the production of carding mc per 8 hr shift at 85

efficiency

6 Calculate the production of Carding mc in kgs8hr shift at 90

efficiency

Given data delivery roller speed= 250 rpm CCR dia = 2rsquorsquo

Hank of material = 0012 gmt