What is Yarn Withdrawal? | Types of Yarn Withdrawal | Advantages/Disadvantages of Yarn Withdrawal

Yarn Withdrawal:
                    Removal or unwinding of yarn from the package during weaving is called withdrawal of yarn.

Types of Yarn Withdrawal:
There are 2 types of yarn withdrawal:

1. Side withdrawal.
2. Over-end withdrawal.

1.Side Withdrawal: 

In side withdrawal, the spool must rotate in order for the yarn to be removed. Typical uses of side withdrawal are to be found in the various operations on a warp; in view of the multiplicity of ends in a warp it is virtually impossible to use anything but side withdrawal.

Advantages:

• The yarn does not rotate upon withdrawal.
• The yarn twists remain constant. 

Disadvantages:

• At high winding speeds, due to inertia, the rotation of the spool may lead to tension variations in the yarn. 
• This process is costlier for practical use. 
• High speed impairs the stability of the package.

2.Over-end Withdrawal:
 This method is simplest & most common method of yarn withdrawal. The yarn is to take away along a line which roughly coincides with the axis of the package. Using this technique it is not necessary to rotate the package. It is used in circumstances where high winding speeds are required, such as in high speed beaming & the removal of yarn from weft packages.

Advantages:

• Very high rates of yarn withdrawal. 
• Not so expensive. 
• Not necessary to rotate the package. 
• Flanged is not required. 

Disadvantages:

• Balloon formation. 
• There is a chance of one turn twist in the yarn.

Posted in: Weaving