Question:
The purpose of top comb in a cotton comber is:
The purpose of top comb in a cotton comber is:
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In a cotton comber, the {top comb} ensures uniformity and alignment of fibres by {penetrating the fibre fringe and straightening the trailing ends}, leading to higher quality yarns with fewer neps and short fibres.
Updated On: Apr 28, 2025
- remove the leading hooks
- guide the fibre fringe to detaching rollers
- control the fibre stream while piecing
- straighten the trailing end of fibres
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The Correct Option is D
Solution and Explanation
Step 1: Understanding the Combing Process in Cotton Spinning.
Combing is a process that removes short fibres and improves the parallelization of long fibres to enhance the quality of yarn. It involves the following elements:
Nipper: Holds the fibre fringe.
Cylinder comb: Combs the projecting fibres while the nipper holds the tuft.
Top comb: Acts on the trailing ends of the fibres.
Step 2: Role of the Top Comb.
After the cylinder comb combs the leading end of the fibres, the top comb descends and penetrates into the fibre fringe while the fibres are still held by the nipper.
Thus, the top comb helps in achieving improved fibre alignment and better yarn quality.
Step 3: Eliminate Incorrect Options.
Combing is a process that removes short fibres and improves the parallelization of long fibres to enhance the quality of yarn. It involves the following elements:
Nipper: Holds the fibre fringe.
Cylinder comb: Combs the projecting fibres while the nipper holds the tuft.
Top comb: Acts on the trailing ends of the fibres.
Step 2: Role of the Top Comb.
After the cylinder comb combs the leading end of the fibres, the top comb descends and penetrates into the fibre fringe while the fibres are still held by the nipper.
- Its fine teeth penetrate into the fibre web.
- It straightens the trailing ends of the fibres.
- Short fibres and neps entangled with the trailing ends are retained or removed.
Thus, the top comb helps in achieving improved fibre alignment and better yarn quality.
Step 3: Eliminate Incorrect Options.
- (A) {remove the leading hooks} – Incorrect. Leading hooks are dealt with by the cylinder comb.
- (B) {guide the fibre fringe to detaching rollers} – Incorrect. This is done by the motion of the nipper and rollers.
- (C) {control the fibre stream while piecing} – Incorrect. This is not the function of the top comb.
- (D) {straighten the trailing end of fibres} – Correct.
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