Download - Yarn production process/ Spinning process
Presentation On Yarn Manufacturing
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
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NAME:- ID No. :-
Md. Yousuf Hossain. 120103063
Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Fiber:- A unit of matter characterized by flexible,
fineness, elasticity, sufficient strength and a high length
to width ratio.
e.g: Natural (Cotton, Jute, Wool, Silk)
Manmade (Viscose, Polyester)
Yarn:- Yarns are a grouping of fibers twisted together to
form a continuous strand.
e.g: Staple or filament yarn.
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Spinning:- Spinning is the process by which fibers are converted into yarn.
Process flow chart of spinning- Cotton Bale Blowroom
↓ Carding
↓ Drawing
↓ Combing
↓ Drawing
↓ Roving/ Speed/ Simplex Frame
↓ Ring Spinning Yarn
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Blowroom
The section where the supplied compressed bale is turned into a uniform lap by opening, cleaning, blending or mixing.
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Functions of Blowroom:-
Opening: Open the cotton bales.
Cleaning: Eliminate dust, dirt, broken leaf, seed
particles, grass.
Blending / Mixing: By blending/mixing different
types of cotton produce a comparatively good
quality cotton.
Lap Forming: Convert the opened and cleaned
fiber into a sheet form.
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Flow Chart of Blowroom
(Modern):
Bale plucker
↓
Metal detector
↓
Uniclean
↓
Unimix
↓
Uni flex
Vision shield
↓
Condenser
↓
Chute feed
↓
Carding
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Carding
Carding is the reduction of entangled mass of fibers to filmy web by working them between two closely spaced relatively moving surfaces closed with sharp points.
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Functions Of Carding Machine
To remove the small trash particles.
To give some degree of blending.
To eliminate the remaining impurities.
To produce a thick untwisted rope of fibers called
sliver.
Reduction of neps.
Fiber orientation.
Elimination of short fibers.
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Carding
Main Parts:
Taker-in: The region from lap roller upto cylinder is
known as taker-in.
Cylinder: The cylinder get opened with sharp teeth
and then pass over to doffer.
Doffer: The doffer take the cleaned cotton.
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Combing
The process of
straightening or
parallelizing of fibers
and removing of short
fibers and impurities
by using brushes and
rollers is called
combing.
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Objectives of Combing
To remove naps in the carded sliver.
To make the fiber more parallel and straight.
To produce a uniform sliver of required per unit length.
To remove the fiber shorter than a predetermined length.
To remove remaining impurities in the comber lap.
Formation of sliver having maximum possible evenness.
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Drawing
Drawing is the
process in which the
slivers are blended,
doubled, leveled and
drafted by passing the
slivers through a
series of pairs of
rollers.
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Function Of Drawframe Machine
To straighten the crimped and hooked fibers.
To achieve a fairly through parallelization of the
fibers.
To improve the short, medium and long term
unevenness of the slivers by doubling.
To produce a more uniform sliver.
To reduce the weight/unit length of the card sliver.
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Roving/Speed/Simplex Frame
Simplex is an intermediate process in which fibers are
converted into low twist lea called roving.
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Operations Involved in Simplex Machine:
i. Creeling
ii. Drafting
iii. Twisting
iv. Winding
v. Building
vi. Doffing
Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Functions Roving/Speed/Simplex Frame:
To prepare the package for the R/F.
To draft the sliver to reduce weight per unit length.
Insert small amount of twist to give required strength of roving.
Wind the twisted roving on to the bobbin.
Build the roving in bobbin such a form which will facilitate handling, withdrawing & transfer to the next process.
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Ring Frame
Spinning process is done by the Ring frame machine. Ring frame
converts the bobbin into yarn.
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Functions of ring frame:
Draft the roving until the
required fineness is achieved.
Twist the drafted strand to form
yarn of required count and
strength.
Winding the twisted yarn on to
the bobbin for suitable storage,
transportation and further
processing. Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
Advantage of Ring Spinning System:
i. Any type of material (fiber) can be spun.
ii. Wide range of count can be processed.
iii. It delivers a yarn with optimum characteristics.
iv. Idealized twisting system.
v. It is uncomplicated and easy to operate.
vi. Higher yarn strength can be achieved
Disadvantages of Ring Spinning System:
i. Low production.
ii. Machine generates more heat .
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Md. Yousuf Hossain, Green University Of Bangladesh, [email protected]
