yarn manufacturing introduction

7/29/2019 Yarn Manufacturing Introduction

1/17

Yarn ManufacturingIntroduction

1

Engr . Shan ImtiazLecturer

The University of Faisalabad


2/17

SPINNING

Spinning is the process of converting thefibre to yarn by opening, cleaning, mixing,

straightening, drafting and twisting of

fibres.

205/10/2012 Engr. Shan Imtiaz


3/17

FLOWCHARTMixing

Blowroom

Card

Comber

Drawing

Simplex

Ring

Autocone

Conditioning

Packing3


4/17

MIXING

In this process cotton fibres of different varietiesor between various grades of same variety are

combined to form single product.

Purpose of mixing is to avoid the variations in

yarn.

Manually or byMachines

Cotton Bales Cotton Tufts



5/17

BLOWROOM

The name blow room indicates that Transfer of fibers from one machine to another machine

by airflow.

The blowroom is the section of a cotton spinning mill

where the preparatory processes of opening, cleaningand mixing are carried out.

Blowroom removes heavier

impurities of cotton.

Impurities becomes less as cottonpass from one blowroom machine

to next.



6/17

Blowroom

Card

Drawing



7/17

CARD

Carding is the action of reducing tuftsof entangled fibers into a filmy web ofindividual fibers by working the tufts

between closely spaced surfacesclothed with opposing sharp points.

Carding is one of the most important

operations in the spinning process as itdirectly determines the final features

(quality) of the yarn.



8/17

Carded Sliver(Thick,

unparallel strand of fibres

without twist) 805/10/2012 Engr. Shan Imtiaz


9/17

COMBER

Combing is used for upgrading the quality of medium staple fibers Combing is the process ofextracting the short fibres from cotton for

making high quality yarn from longer fibres.

The combing process is normally used to produce Smoother, finer,

stronger and more uniform yarns

First fibes lap are formed Fibres lap are then combed9



10/17

DRAWING

The process of straightening and paralleling the fibres bystretching (drafting) and levelling (doubling) is known as

drawing.

Machine used:

DrawingInput material:

Carded or combed sliver

Output material:

Drawing sliverDrawing Machine



11/17

SIMPLEX

It is an intermediate process in which fibers(sliver) are converted into fine and low twist

strand (roving) by drafting and twisting.

The sliver which is taken from draw frame isthicker so it is not suitable for manufacturing of

yarn. Its purpose is to prepare input package

(roving) for next process (yarn manufacturing).



12/17

Simplex

Simplex Machine

Roving

(Thin twisted strand of

fibres in rope form)

Drawn Sliver

(Thick, parallel strand of

fibres without twist)



13/17

RING

The main process of making

yarn formation.

In this process thin strand

(roving) is again drafted and

twisted to make yarn and then

winded on smaller packages

called ring bobbins.



14/17

Ring frame

Ring Bobbins

(Smaller Yarn Packages)



15/17

AUTOCONE

The winding process has the basic function ofobtaining a larger package from several small

ring bobbins. Further functions of winding are to

check the yarn and to eliminate any faults found.

Yarn Cone

Autocone Machine 1505/10/2012 Engr. Shan Imtiaz


16/17

CONDITIONING

The process in which

yarn is conditioned

(moisturized) for betterperformance (such as

strength, luster, handle

etc) is called yarnconditioning.



17/17

PACKING

Packing process involves storage of cones

in bags for proper transfer of material

without damaging the yarn.

Local Packing

Export Packing

Yarn Bags

Pallet Packing


yarn manufacturing introduction

Documents