Carding is a mechanical process that disentangles, cleans and intermixes fibres to produce a continuous web or sliver suitable for subsequent processing. It is called the heart of spinning. The carding machine is set with hundreds of fine wires that separate the fibres and pull them into somewhat parallel form. A thin web of fiber is formed, and as it moves along, it passes through a funnel-shaped device that produces a rope like strand of parallel fibres. Blending can take place by joining laps of different fibres. From carding action sliver is formed.
Objectives of carding
- To open the flocks into individual fibres
- Cleaning or elimination of impurities
- Reduction of neps
- Elimination of dust
- Elimination of short fibres
- Fibre blending
- Fibre orientation or alignment
- Sliver formation
Main actions of carding machine
- Action between fee roller & taker in
- Action between taker in and cylinder
- Action between cylinder and flat
- Action between cylinder and doffer
Useful sliver hanks of different counts:
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Description
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Counts
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Count of yarns
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10s
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20s
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32s
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40s
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60s
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80s
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Hank of carded sliver
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0.125
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0.125
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0.13
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0.135
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0.145
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0.165
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Wastage in Carding
- Taker in waste
- Flat strip
- Motes & flies
- Sliver cut
- Filter waste
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