Yarn Winding process | Precision Winding | Non Precision Winding

Winding is the process of transferring yarn or thread from one type of package to another to facilitate subsequent processing. The rehandling of yarn is an integral part of the fiber and textile industries. Not only must the package and the yarn itself be suitable for processing on the next machine in the production process,

but also other factors such as packing cases, pressure due to windingtension, etc., must be considered. Basically, there are two types of winding machines: precision winders and drum winders. Precision widers, used primarily for filament yarn, have a traverse driven by acam that is synchronized with the spindle and produce packages with a diamond-patterned wind. Drum winders are used principally for spun yarns; the package is driven by frictional contact between the surface of the package and the drum.

Types of Winding

A.Precision Winding

B.Non Precision Winding 

A.Precision Winding 

By precision winding successive coils of yarn are laid close together in a parallel or near parallel manner. By this process it is possible to produce very dense package with maximum amount of yarn stored in a given volume.

Features 

• Package are wound with a reciprocating traverse 
• Patterning and rubbing causes damage of packages 
• Package contains more yarn 
• Package is less stable 
• The package is hard and compact 
• The package is dense 
• Rate of unwinding of package is low and the process of unwinding is hard 
• The unwound coil is arranged in a parallel or near parallel manner

B.Non Precision Winding 

By this type of winding the package is formed by a single thread which is laid on the package at appreciable helix angle so that the layers cross one another and give stability to the package. The packages formed by this type of winding are less dense but is more stable.

Features

• Only one coil is used to make this packages 
• Cross winding technique is used 
• The package density is low 
• Minimum number of yarn is wound 
• The package formed is soft and less compact 
• The stability is high 
• Flanges are not required 
• The rate of unwinding is high and the process is easy 
• The packages formed have low density