What is Winding? Types of Winding

What is Winding?

Winding is a process of transferring yarn from a small package to a big package that is adequately compact & suitable for the next process.

The Objective of Winding : 

1) To transfer yarn from one supply package to another package.

2) To improve the yarn quality.

3) To store the yarn.

4) To increase productivity.

5) To make a large package.

6) To make an adequately compact package.

7) To remove the objectionable fault in the original yarn.

8) To make a suitable package for the next process

Requirement of Winding:

1. The defect level in the yarn must be reduced.
2. The yarn must not be damaged.
3. The package size & shape should be controlled.
4. The yarn must be wound in such a way so that it can unwound easily.
5. The yarn package must be cheap.
6. The characteristics of yarn should not be changed.
7. The breakage rate must be reduced.
8. No problem should be happened in the subsequent process.

Auxiliary Function of Winding:

1. Creeling – Placement of full package.
2. Piecing_ – Finding & connecting the ends of the package.
3. Doffing – Replacing a full package with an empty package.

Types of Winding: 

There are some types of winding have been mentioned below:

According To Package

1. Flanged bobbin
2. Pirn
3. Cop
4. Cone
5. Cheese

According To Winding

1. Precision
2. Non – Precision

According To Drive

1. Direct drive
2. Indirect drive

According To The Type of Yarn Used

For warp yarn

1. Upright spindle
2. Drum / cylinder( warp, cheese, spool, cone

For weft yarn

1. Pirn ( ordinary, Automatic)
2. Cop

Difference Between Precision and Non–Precision Winding:

Precision Winding	Non – precision Winding
1) The coil is arranged parallel or near parallel.	1) Cross – wound
2) Winding angle is 90º or near 90º	2) Less than 80 º
3) A flanged bobbin is used.	3) Not used
4) A hard & more compact package is produced.	4) Soft & less compact.
4) Low stable package is produced.	5) High stable.
6) High yarn density in the package.	6) Low density.
7) High yarn tension	7) Low tension.
8) Difficult to dye.	8) Easy

Methods of Package Driving:

Direct Drive / Spindle Drive: 

There are 2 types of ways to package driving, such as:

i) Direct drive with constant rpm-

The package is placed in a spindle and the spindle is rotated with the motor. Therefore, the package gets angular motion directly from the motor.

ii) Direct drive with variable rpm –

The package is placed in a spindle and the spindle is rotated with the motor. Therefore, the package gets rotary motion directly from the motor.

Indirect Drive / Drum driven with surface contact: 

The drum is in contact with the package, so as the drum rotates, the package also rotates. Therefore, the grooves in the drum provide the traversing motion for the yarn.

Types of Winding Package: 

(According to the angle at which yarn laid on the empty bobbin)

1. Parallel Winding – In this type, the yarn is laid parallel to each other on the package containing flanges on both sides. 

Example: Warper’s bean

2. Near–parallel Winding – In this type, one or more yarns are laid very nearly parallel to the layers already existing on the package. 

       Example: Pirn, Cop.

3. Cross–Winding – In this type, a single yarn is laid on the package at an appreciable helix angle so that the layers cross one another.

Example: Cheese, cone

Side of package

Axis of yarn

Θ = Angle of wind

Coil angle (the angle that is made by the yarn with the axis of the package)

Comparison among parallel, near–parallel, and cross–winding:

Parallel Winding	Near–parallel winding	Cross – winding
1) Stable.	1) Not stable	1) Very stable.
2) Flanges are required.	2) Flanges are required.	2) Flanges are required.
3) A traversing mechanism is not required	3) A traversing mechanism is not required.	4) The yarn twist is not changed
4) The yarn twist is not changed	4) The yarn twist is  changed.	4) The yarn twist is changed.
5) Over withdrawal is not possible	5) Over withdrawal is not possible	5) Over withdrawal is not possible.
6) Example: Warper’s beam	6) Example: Pirn, Cop	6) Example: Cheese, cone, spool