Objective and Different action in carding Machine

CARDING

Carding is the process in which sliver is formed from lap by carding m/c. Carding may be defined as the reduction of an entangled mass of fibers to a filmy web working two closely spaced, relatively moving surface clothed with sharp wire points. The carding is the heart of the spinning mill.

Carding Machine

Object of carding:

1. Opening to individual fibres:

    The blow room only opens the raw material to flocks where as the card opens it to the stage of
    individual fibres.

2. Elimination of impurities and dust:

    Elimination of foreign matter occurs mainly licker-in or takerin region. The card also removes
    a large proportion of micro-particles.

3. Elimination of short fibres:

    Short fibres can only be eliminated if they are pressed into the wire points.

4. Disentangling of neps:

    The card reduces the number of neps from the Blow room. Actually neps are not eliminated at 
    the card, intact they are mostly opened out.

5. Fibre blending:

    Intimate fibre with fiber mixing is achieved in carding.

6. Fibre orientation:

    The card is often attributed effect of parallelizing.

7. Sliver formation:

    Sliver is formed in carding as an intermediate product.

    Generally, the card sliver hank lies between 4 ktex to 5.5 kilotex. From the above discussion, 
    it is cleared that carding is called the “Heart of spinning”.

Different action in carding:

1. Carding action:

    When two close surfaces have opposite wire direction and their speed

    direction or relative motion is also opposite. Then the action between two surfaces is called 
    carding action.

Function:

• It is occurred between flats and cylinder.
• Maximum individualization of fibers is achieved in this region.
• Naps short fibers dirt and dust are removed by this action.
• There always should be point against point action.

2. Stripping action:

    When two close surfaces have same wire direction and their speed direction or relative motion
    is opposite then the action between two surfaces is called stripping action.

Object: 

•     It is occurred between licker in and cylinder. 
•     There are should be point against back action. 
•     Individualization of fibre is also by this action.

3. Doffing action:

   When two close surfaces have opposite wire direction and their speed direction or relative 
   motion is also opposite then the action between two is called doffing action

Object:

• It is occurred between cylinder and doffer.
• Web formation is accrued by this action.
• There always should be point against point action.

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