Functions and briefly describe of Carding Machine

Functions of Carding Machine:

To individualise the fibres.
To remove impurities.
To clean cotton thoroughly off the lighter dirt & trash as well as to remove a certain proportion of neps & short fibers from the opened material.
To convert Blow Room lap/ Chute feed sheet into the loose, roughly parallel, untwisted strand fibres called ‘sliver’.

Details of Carding Machine:

Functions of Carding Machine: To individualise the fibres. To remove impurities. To clean cotton thoroughly off the lighter dirt & trash as well as to remove a certain proportion of neps & short fibers from the opened material. To convert Blow Room lap/ Chute feed sheet into the loose, roughly parallel, untwisted strand fibres called ‘sliver’. Details of Carding Machine: Different Zones of Carding Machine: Chute feed/ Lap : The feed material for carding is in the form of Blow Room lap or by direct Chute feed system, In chute feed system the small tufts of fibres (sheet form) fed directly from blow room to a series of cards, arranged in a circuit through pneumatic pipe. Feed roller & Licker-in: The roller that receives fibres from the feed roll(s) is called the licker-in. Licker- in opens the cotton into very small tufts, extracting the seed bits, sand and other vegetable trash particles from cotton. Licker-in transfers the cotton to the cylinder zone. Cylinder & Flats: The main work of the card is to individualise fibers which is performed between the main cylinder and the flats. Only by means of this fiber separation it is possible to eliminate the dirt, especially the finer particles and dust. Doffer: Fibres from cylinder are transferred to doffer. Difference in speed of cylinder and doffer enables fibre to be stripped by stripper roller from doffer to form card web. Condensation of web & Trumpet: The fibre web is stripped from the doffer using a stripper roller. It is then passed through a pair of squeeze or crush rolls before it is finally accumulated width wise into a fibre strand form (Card Web).The calendar rolls compress the fibre strand to provide better integrity and stable flow of material. The fibre strand (the card sliver) proceeds upward over guide pulleys to enter the coiler system. This consists of a trumpet, guide and a second pair of calendar rolls that delivers the carded sliver through a revolving tube into the card sliver can. Sliver & Carding can: The rotary movements are required for cycloidal coiling of the sliver. On one hand, the rotatable plate must be rotated above the can, while the can itself must rotate, at a considerably slower rate, below the plate. A sliver tube is provided on the plate as a fixed part to guide the sliver from the calendar rollers into the can. Stop signals: Signal lamps are provided on the machine to indicate the reason for stoppage of machine. Understand each signal lamp and their purpose in the machine. Display Panel: It displays various operating machine parameters like speed, production etc. Understand the details in the display panel and work accordingly

Different Zones of Carding Machine:

Chute feed/ Lap :
The feed material for carding is in the form of Blow Room lap or by direct Chute feed system, In chute feed system the small tufts of fibres (sheet form) fed directly from blow room to a series of cards, arranged in a circuit through pneumatic pipe.

Feed roller & Licker-in:
The roller that receives fibres from the feed roll(s) is called the licker-in. Licker- in opens the cotton into very small tufts, extracting the seed bits, sand and other vegetable trash particles from cotton. Licker-in transfers the cotton to the cylinder zone.

Cylinder & Flats:
The main work of the card is to individualise fibers which is performed between the main cylinder and the flats. Only by means of this fiber separation it is possible to eliminate the dirt, especially the finer particles and dust.

Doffer:
Fibres from cylinder are transferred to doffer. Difference in speed of cylinder and doffer enables fibre to be stripped by stripper roller from doffer to form card web.

Condensation of web & Trumpet:
The fibre web is stripped from the doffer using a stripper roller. It is then passed through a pair of squeeze or crush rolls before it is finally accumulated width wise into a fibre strand form (Card Web).The calendar rolls compress the fibre strand to provide better integrity and stable flow of material. The fibre strand (the card sliver) proceeds upward over guide pulleys to enter the coiler system. This consists of a trumpet, guide and a second pair of calendar rolls that delivers the carded sliver through a revolving tube into the card sliver can.

Sliver & Carding can:
The rotary movements are required for cycloidal coiling of the sliver. On one hand, the rotatable plate must be rotated above the can, while the can itself must rotate, at a considerably slower rate, below the plate. A sliver tube is provided on the plate as a fixed part to guide the sliver from the calendar rollers into the can.

Stop signals:
Signal lamps are provided on the machine to indicate the reason for stoppage of machine. Understand each signal lamp and their purpose in the machine.

Display Panel:
It displays various operating machine parameters like speed, production etc. Understand the details in the display panel and work accordingly