yarn production process/ spinning process

Presentation On Yarn Manufacturing

11/29/2014

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Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

11/29/2014

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NAME:- ID No. :-

Md. Yousuf Hossain. 120103063

Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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.

11/29/2014

8 Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

11/29/2014 11

Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

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, yousuf_te@yahoo.com

Thanks To All For Watching

This Presentation.

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