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Yarn production process/ Spinning process
1. Presentation On Yarn Manufacturing
11/29/2014
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Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com
2. 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
3.
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
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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
11/29/2014
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Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com
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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
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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
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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
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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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Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com
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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.
11/29/2014
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Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com
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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.
11/29/2014
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Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com
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Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com
12.
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
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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.
11/29/2014
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Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com
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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.
11/29/2014
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Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com
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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.
11/29/2014
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Md. Yousuf Hossain, Green University Of Bangladesh, yousuf_te@yahoo.com
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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
17.
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
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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
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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
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Thanks To All For Watching This Presentation.
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yousuf_te@yahoo.com