REVIEW

TEXTINFO

TECHNOLOGY OF SHORT-STAPLE

SPINNING

BLOW ROOM TO RING FRAME BASICS

http://www.textlnfo.wordpress.com

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TECHNOLOGY OF SHORT-STAPLE SPINNING

BLOW ROOM TO RING FRAME BASICS

RIKIPEDIA - THE RIETER TEXTILE KNOWLEDGE BASE

A comprehensive understanding of the relevant technological and engineering principles

provides the fuel for innovation and successfully keeping pace with developments in the textile

industry. Only a thorough knowledge of the relationships within and between the different

process stages can enable machine settings and thus end products to be optimized in such a way

as to ensure success in the marketplace.

With RIKIPEDIA Rieter offers specialists, students and other interested parties a reference work

with a practical focus on the technology of short staple spinning. The latest findings as well as

historical background material are clearly explained in words and color illustrations. The

contents are based on the book series "The Rieter Manual of Spinning".

Rieter card for 1836

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INDEX

Sr.no. Title Pg. no.

1. General-Technology of Short-staple spinning

2. Raw Material as a Factor Influencing Spinning

2.1. Characteristics of Raw Material

2.2. Fiber fineness

2.2.1. Influence of fiber fineness

2.2.2. Specification of fiber fineness

2.2.3. Fiber maturity

2.3. Fiber Length

2.3.1. The influence of length

2.3.2. The staple diagram

2.3.3. Various staple diagram

2.3.4. The specification of Length

2.3.5. The Proportion of Short Fibers

2.4. Fiber Strength

2.5. Fiber Elongation

2.6. Fiber Slenderness Ration

2.7. Fiber Cleanliness

2.7.1. Impurities

2.7.2 Neps

2.7.3. Dust

2.7.4. Chemical Deposition (sticky substance)

2.7.5. Relative influence of fiber fineness

3. Opening

3.1. The need of opening

3.2. Type and degree of opening

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3.3. The intensity of opening

3.4. General considerations regarding opening and cleaning

3.5. Carding

3.5.1. The purpose of carding

3.5.2. Clothing arrangement

3.5.3. Forces acting on the fibers

3.5.4. Fiber transfer factor

3.5.5. The most important working region in carding

4. Cleaning

4.1. Impurities to be eliminated

4.2. Possibilities for cleaning

4.3. Grid and mote knives

4.4. Influencing factors

4.5. Degree of cleaning and resistance to cleaning

4.6. Dust removal

5. Blending

5.1. The purpose of blending

5.2. Evaluation of the blending

5.3. De-blending

5.4. Blending procedures

6. Reducing the unevenness of yarn mass

6.1. Unevenness of yarn mass

6.1.1. The unevenness limit

6.1.2. Deterioration in evenness during processing

6.1.3. Unevenness over different lengths

6.2. Basic possibilities for equalizing

6.3. Doubling

6.3.1. The average effect

6.3.2. Transfer doubling

http://www.rieter.com/en/rikipedia/articles/technology-ofshort-staple-spinning/opening/general-considerations-regarding-opening-andcleaning/

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6.3.3. Back doubling

6.4. Leveling

6.4.1. Measuring, open and closed loop control

6.4.2. Open loop control

6.4.3. Close loop control

6.4.4. Adjustment of draft

6.5. Drafting with simultaneous twisting

7. Attenuation(draft)

7.1. The draft of the drafting arrangement

7.2. The drafting operation in the drafting arrangement

7.3. Behavior of fibers in the drafting zone

7.4. Friction fields

7.5. Distribution of draft

7.6. Other drafting possibilities

7.7. Additional effect of draft

8. Yarn formation

8.1. Assembly of fibers to make up a yarn

8.1.1. Arrangement of the fibers

8.1.2. Numbers of fibers in the yarn cross-section

8.1.3. Fiber disposition

8.1.4. The order of fiber within the yarn

8.1.5. The position of the fibers in the yarn structure

8.1.6. Yarn structure

8.2. Fiber migration

8.3. Imparting strength

8.3.1. Possibilities for imparting strength

8.3.2. True twist (with reference to ring spun yarn

8.3.3. False twist

8.3.4. Self twist

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9. Handling material

9.1. Carriers for material

9.1.1. Material carriers and transport

9.1.2. Package forms

9.2. Laying down in cans

9.3. Winding by rolling and lap forming

9.4. Winding on flyer frame

9.5. Winding on flyer bobbins

9.6. Winding on cops

9.6.1. Build of the cops

9.6.2. The winding process

9.6.3. Force and tension relationships during winding by using travelers

9.6.4. Effects on the travelers

10. Quality Assurance

10.1. The necessity

The structure of the mill information system (MIS)

10.2. The Rieter SPIDERweb mill information system (mill monitoring system)

10.3. Comment

11. References

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GENERAL - TECHNOLOGY OF SHORT-STAPLE SPINNING

"Technology of Short-staple Spinning" deals with the basics and therefore generally valid,

technological relationships in short-staple spinning. The following chapters will be organized

according to machines or machine groups. Generally valid basic principles will thus be kept

separate from ongoing developments in machine design and construction.

Introduction to Spinning

The annual world fiber consumption in 2004 amounted to approx. 70 mio tons (synthetics: 38

mio tons, cotton: 22 mio tons, cellulose fiber: 2.5 mio tons and others: 7.5 mio tons).While about

one third of the man-made fibers is processed as endless filament; still two thirds come in staple

fiber form. The larger part of staple fiber, approx. 33 mio tons are processed in short staple

spinning. This part of the spinning industry therefore is of great significance in the world of

textile production. It is correspondingly important that adequate trained management personnel

are available, with the necessary technical and technological knowledge. While technical

knowledge relates more to machines, technological aspects are concerned with processing.

Technological knowledge is the summarized expression of the basic principles involved in

conversion of raw material to semi-finished or fully finished products separated from the actual

or currently realizable possibilities for putting these principles into effect. In relation to spinning,

technology is concerned with the study of the production of a yarn. In this context the word

spinning refers to the conversion of a large quantity of individual unordered fibers of relatively

short length into a linear, ordered product of very great length by using suitable machines and

devices. In processing natural fibers, the same basic operations are always involved. It is the aim

of this volume to provide an introduction to the technology of spinning, to the relationships and

laws involved in the performance of these basic operations and to awaken or to deepen

understanding of what happens during material processing.

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TABLE 1MACHINES USED IN SHORT-STAPLE SPINNING

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RAW MATERIAL AS A FACTOR INFLUENCING SPINNING

Characteristics of the Raw Material

Raw material represents about 50-75% of the manufacturing cost of a short-staple yarn. This fact

alone is sufficient to indicate the significance of the raw material for the yarn producer. The

influence becomes still more apparent when the ease in processing one type of fibre material is

compared with the difficulties, annoyance, additional effort, and the decline in productivity and

quality associated with another similar material. But hardly any spinner can afford to us