Comber

To remove short fibers, neps, impurities by using a comb is called combing. These removes by brushes and rollers which assisted of combs. This process is done by a comber machine. This process is carried out to improve quality of the sliver which is coming out from the card.

Outline diagram of a Comber:

Name of the components:

1. Combing head.
2. Sliver table.
3. Drafting arrangement.
4. Coiler.
5. Sliver.

Cross-section diagram of a comber:

Name of the components:

1. Lap.
2. Lap feed roller.
3. Main feed roller.
4. Bottom nipper.
5. Top nipper.
6. Combing cylinder.
7. Top combs.
8. Detaching roller.
9. Trumpet-1.
10. Sliver table.
11. Drafting system.
12. Trumpet-2.
13. Coiler.
14. Sliver can.

Description of process sequence of a comber:

1. Lap feed by feed roller.
2. Lap nipping by the nipper.
3. Combing by the cylinder.
4. Nipper opening and forwarding.
5. Detaching roller backward movement.
6. Piecing.
7. Detaching roller forward movement.
8. Combing by the top comb.
9. Top comb withdrawing.

Degree of combing: Amount of noil to be extracted from the lap by the combing machine. Degree of combing is always expressed in percentage.

Types of combing:

1. Semi-combing = 5-10% noil.
2. Normal combing = 10-20% noil.
3. Super combing = above 20% noil.

Noil: Noil is the wastage of comber including short fibers, dirt, dust, impurities etc.