Warping: definition, requirements and parts of warping machine

Warping is the parallel winding of yarn from cone or cheese package on to a warp beam.

Why warping is done.

1. To wound up fixed length of yarn to a warp beam
2. To increase the weavability of yarn
3. To make the next process dynamic
4. To increase production
5. To increase the quality of fabric
6. To make small package reusable
7. To make a convenient yarn sheet for sizing

Requirements of Warping

1. The tension of the wound ends must be uniform and constant during all times of withdrawal from supply package
2. Warping should not impair the physical and mechanical properties of yarn
3. The tension should be moderate to enable the yarn to retain its elastic property completely
4. Predetermined length of the yarn should be observed
5. The production rate of warping should be high
6. The surface of warping package must be cylindrical

Components of a Warping Machine

The warping machine is mainly divided into two major components

1. Creel
2. Headstock

Components of creel

1. yarn clearer
2. stop device
3. indicator
4. tensioners
5. yarn guide
6. package base
7. blower or suction fan

Components of Headstock

1. adjustable V-wraith
2. measuring and marking device
3. yarn speed controlling device
4. pneumatic or hydraulic pressure unit
5. break assembly
6. driving drum
7. stop motion
8. building drum
9. beam bracket
10. lease  rod