The process by which the fibers are separated from the seeds is called ginning. It is one the most important step of spinning process. After collecting from field, Seed cotton moves to nearby gins for separation of lint and seed. The production of a typical gin is about 12 bale per hour. (here 1 bale = 500 pound)
Objects of ginning
- To make the fiber free from seeds without gin-cut fiber
- To get fair price of the cotton
- To be confident that fiber does not contains excess and unexpected seeds
- To make the spinning process easier and effective
Ginning process of cotton
- At first the cotton is made to go through dryers to reduce moisture content.
- Then cotton is made to go through cleaning equipment to remove foreign matters.
- The cotton is then air conveyed to gin stands where revolving circular saws pull the lint from the saw teeth by air blasts or by rotating brushes.
- The cotton is compressed into 500 pounds weigh contained bales.
- Then the bales of cotton are shipped to textile mill for further processes.
Type of ginning
Advantage of saw ginning
- Saw ginned cotton is more uniform
- Cotton is more clean
Disadvantage of saw ginning
- Possibility of fiber breakage due to drawn up the fiber from the surface of seed
- Increase neps
- Increase short fiber content
Advantage Roller ginning
- Fiber quality is better than saw ginned cotton
- High production
Disadvantage Roller ginning
- The moisture of seed mix up with fiber in processing which cause cake cotton fault.
Faults in ginning
- Gin-cut fiber
- Crushed seeds
- Neps formation
- Too much wastage
Engineer Sheikh Nurja
B.Sc engineer of textile
Merchandiser at buying house
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