Hafiz Shahbaz Ahmad Virk

Flow chart of weavingYarn

Weft Yarn

Pirn Winding

Warp Yarn

Winding

Warping

Sizing

Drawing In

Weaving2

What is Winding

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The process of transferring yarns from ring, bobbin, hank into a suitable package is called winding. It may be electrical or mechanical.

The creation of large yarn packages that can be easily unwound, is called winding.

• Definition:

Yarn wound on formers which facilitateconvenient handling and withdrawal.

is a device that facilitates yarn storage in asuitable from that can be retrieved later asneeded / required.

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Winding

Winding is one of the most important operation, which is mainly occurred in spinning section. Besides, it is also important in fabric manufacturing. In fabric manufacturing, directly winding is not so much important, but rewinding is so important. This makes using the yarn on subsequent machines both easier and more economical.

For warp winding → Cone, cheese, flanged bobbin.

For weft winding → Pirn, cop.

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Winding is one of the most important operation,

which is mainly occurred in spinning section.

This makes using the yarn on subsequent

machines both easier and more economical.

Three zones of winding:

1. Unwinding zone

2. Tension and clearing zone

3. Winding zone

INTRODUCTION:

To prepare the bigger package from ring bobbin.

To transfer yarn from one package to another suitable package, this can be conveniently used for used for weaving process.

To remove yarns fault like hairiness, naps, slabs, foreign matters. To clean yarn. To increase the quality of yarn. To get a suitable package. To store the yarn To wax the material.

To improve the quality of yarn

OBJECTIVES:

There are two types of winding

1.Spindle drive: Where the spindle upon which the package is placed is driven directly.

(a) Constant speed winder

(b) Variable speed winder

2.Friction drive: where the spindle upon which the package is placed is free to rotate and package is

driven through friction by contact with a driven

drum.

TYPES OF WINDING

PARTS OF WINDING MACHINE

CRADLE:

Its function to provide setting to cone having

package holders, it lies on upper part of machine

on drum.

Drum

It a polished surface metallic drum slightly cone

type .It has cut marks or grooves cut in to it at its

surface to help the cross winding of packages.

PARTS OF WINDING MACHINE

Magazine:

Magazine is the main component

of the autoconer machine its

function is to hold the cops

for winding its capacity lies up to 9 cops.

Tension assembly:

Tension assembly provides sufficient tension to theyarn during unwinding from cope to winding on tocones.

PARTS OF WINDING MACHINE

Yarn clearer:Its function is to removes the faults

such as thin and thick places,

neps, hairiness according to the

set value.

Waste suction pipe:During yarn cutting and splicing it sucks the waste yarn.

PARTS OF WINDING MACHINE

Bobbin plate:The function of plate is to rotate the bobbins one by one.

Bobbin holder:

It is a disk type wheel ,its functions is to hold the filled bobbins for unwinding process.

Wax motor:Its function is to run wax bush continuously.

PARTS OF WINDING MACHINE

Wax bush:To provide smooth surface to yarn wax is applied especially to the yarn intended for knitting, the function of wax bush is to apply wax to yarn to make its hairs sticky.

Suction mouth:When ever yarn breaks during

winding the package move in

opposite direction with slow

speed during that time it sucks

the broken yarn end from the

package and take it for splicing.

PARTS OF WINDING MACHINE

Retie pipe:It take the yarn end from bobbin toward splicing mechanism.

Splicer:The splicing mechanism performs

the knot free joining of the two yarn

ends after yarn breakage.

Now a days air splicing is used.

PARTS OF WINDING MACHINE

Dust removal unit:It collects the dust and fiber fly.

Traveling cleaner:It moves from one end to another

end of machine to remove and

suck the dust ,fly and other

contaminant particles and

keeps winding unit clean.

WORKING PRINCIPLE

Winding process should be accurate for

accelerate the next fabric manufacturing

process. winding process should fulfill the

following requirements……..

Winding process should be easy.

Characteristics of the yarn should not be change

Winding process should be economical.

winding faults should be minimize.

Yarn package size and shape should be suitable.

REQUIREMENTS

ATMOSPHERIC CONDITIONS OF AUTOCONE DEPARTMENT

In auto cone department the humidity and

temperature are maintained according to the

requirements throughout the year.

Normally ranges are:

humidity% 55~80%

temperature 22~39.5℃

Effect of winding tension

If winding tension is selected properly, the following tensile properties are not affected

tenacity

elongation

work- to- break

But excessive tension in winding will deteriorate the above said tensile properties.

• Rule of winding:▫ One end is fixed on a package and other end is

rotated w.r.t. fixed end around the package axis to impart coils parallel or at angle to the diametrical plan of the package.

• Angle of Wind

contained▫ The anglebetween a warp of yarn onthe surface of a packageand the diametrical planeof the package.

• Angle of Crossing

▫ The angle between two coils on the surface of package.

• Angle of Reversal

▫ Angle made by same coil afterreversal at edge of yarnpackage.

• Taper angle

▫ Angle made between surfaceto theof the

of the packagediametrical planepackage.

Taper Angle

Winding Types

Drive

Positive Negative Inertial

Traversing

Grooved Drum

Traversing Guide

Packages

Pirn Winding

Cone Winding

Precision Winding

Package Types

Angle of Wind

Cross Wound

Parallel Wound

Near Parallel Wound

Cop Build

Core

Cored

Material

Metal

Wood

Synthetic

Paper

Shape

Flanged/Flangeless

Parallel/Taper Side

Porous

Core-less

Yarn

One Yarn

Multiple Yarns

Pirn/quill

Beam with flanges

Angle of Wind Core Type # of Yarns Package Name

Cross Wound

Paper, Flangeless, Taper Side Single

Synthetic, Porous, Flangeless, Taper Side Single

Wood, Flangeless , Parallel Side Multiple

ParallelWound

Metal, Flanged, Parallel Side Multiple

Metal, Porous, Flanged, ParallelSide Multiple

Near Parallel Wound

Wood/Synthetic, Flanged, Parallel Side Single

Core-less Single

Cop Build

Synthetic, Flangeless, Parallel Side Single

Wood, Flangeless, Taper Side Single

Types of Unwinding

Over-end Withdrawal

Side end Withdrawal

• Benefits:

▫ Quick withdrawal

▫ No rotation is required i.e. Package can be stationary

▫ Supports Flangeless Packages

• Drawbacks:

▫ Twist may be effected

▫ Balloon formation

▫ Flanged Packages are not supported

▫ Only feasible for single yarnpackages

• Twist Change:

Twist will be added if the yarn’s twist direction is same as direction ofunwinding

Twist will be removed ifthe yarn’s twist direction is different w.r.t. unwinding direction.

The amount of twist effected will be equal to the number of coils removed from the package to the diameter of the coil.

• Benefits:

Relatively Slow withdrawal

Rotation is required i.e.Package must be rotating

Supports Flanged Packages

Can be for single and multi- yarnpackages

Twist will not be effected

No balloon formation

Drawbacks:

Flangeless Packages are not supported

Unwinding can only be done in onedirection

Different Zones of a winding machine

• Responsible for unwinding of package

• Unwinding is possible by either

▫ Side end withdrawal

▫ Over end withdrawal

• But generally over end withdrawal is done

• Region 2: yarn is subjected to tension and yarnclearers

• Tension device:

▫ provides tension

▫ detects weak places that break under tension

Multiplicative (Capstan): output tension dependant on the input tension

Additive: dead weight or springs are used

Combined: a capstan tensioner and a disc are used

• Clearing device

▫ To remove thick and thin places

▫ Latest systems can also detect foreign fibers

Mechanical yarn clearer

Electronic yarn clearer

• Stop motion

▫ To stop the machine in case of breakage or supply depletion

Mechanical stop assembly

Electronic stop assembly

• Responsible for uniform winding of package

• Only the package is rotated by either:

▫ Spindle drive (Reciprocating Traverse)

▫ Friction drive (Groove Cut in Friction Drum

causes traverse)

• Traversing mechanism is used for distribution of yarn along the package

• Contains piecing unit for joining of broken ends

▫ Manual knotting, Automatic knotting & Splicers

Transferring of yarns from larger to smaller package

• Pirn/quill is used

• Pirn/quill: a filling bobbin placed in a shuttle for shuttle weaving

• No yarn clearing zonehence no inspection ofyarn