Objectives of Carding Machine - Spinning

Carding Machine

Introduction:

Proverbs of the experts “The Card is the heart of the Spinning Mill” and “Well Carded is half spun”. There is a strong relationship between increase in production and reduction in quality. The concept of carding machine is unchanged since 1770. Since 1965 production rate increased from 5 Kg/h to 100 Kg/h. Rate of increase not matched by any other machine except the draw frame.

The tasks (Objects) of the card:

1.    Opening to individual fibers

Ø  Enables elimination of impurities and performance of other operations

2.    Elimination of impurities

Ø  Degree of cleaning on card 90 -95%

Ø  Overall degree of cleaning by B/R and card - 95 to 99%

Ø  Card sliver still contains 0.05 – 0.03% of foreign matter

3.    Elimination of Dust 

Ø  Which are bound to the fibers

Ø  Significant fiber/metal and/or fiber/fiber friction in card 

Carding Machine Design

4.    Disentangling of neps

Ø  Ø  Number of neps increases from machine to machine in the blow-room

Ø  Ø  Card removes neps by small fraction, they are mostly opened out

5.    Elimination of short fibers 

Ø  Ø  Card eliminates very small percentage of short fibers about 1%

6.    Fiber Blending

Ø  Ø  Transverse blending occurs during processing individual fibers

7.    Fiber orientation

Ø  Ø  A parallel condition is achieved on main cylinder

Ø  Ø  But it disappears during web formation between cylinder and doffer

8.    Sliver formation

Ø  For further processing sliver is formed

Ø  Generally hank lies between 4.0 and 5.5 Ktex in the short staple spinning mill