Study on gearing diagram of a Draw frame Machine.

Ginning of seed cotton

 The freshly or first picked cotton has seeds in it, is called seed cotton. After picking the cotton fiber has to  be separated from the seeds . This process y which separated the seeds from the fiber is known as Ginning. It is  carried out mechanically. 

There are two types of  Ginning process

Ø  Saw ginning: It is used mainly for short and medium length fiber.

Ø  Roller ginning: It is often preferred for longer fiber .  It is a slower and mostly cost process.

Faults and  impurities of cotton fiber

Ø  Neps :  Neps are  small groups of entangled fibers which form at cotton processing. In  spinning neps are difficult to eliminate or to comb. It create problem during textile processing.

Ø   Coils: Slightly roped groups of fibers. Mainly short fibers , dead fibers ,  and ill fibers are forming this type of fault.

Ø   Fiber strings: Strongly roped groups of fibers of different shape. It create problem in spinning.

Ø   Trash: Mainly bits of leaves , ball parts , steam etc.

Ø   Motes: Small immature seeds and their fragments.

Ø   Crushed seeds:Parts of seed crushed during primary goal cotton processing.

Ø  Bearded motes: Bits of  seed hulls with fiber.