Carding Action | Part 02

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material passage diagram of carding machine

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Carding Action | Part 02

March 14, 2018 Md. Omar Faruk

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Md. Omar Faruk

Author at Textile Study Center

Student of National Institute of Textile Engineering and Research

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Part 01 | Carding Introduction | | Part 02 | Carding Action

Part 05 | Measuring Devices in Carding | | Part 06 | Characteristics of Card Sliver

Carding Action | Difference Among Carding Actions

Carding: Carding is a mechanical process that disentangles, cleans and intermix fibers s to produce a continuous web or sliver suitable for subsequent processing. In this process fibers are opened, parallelized & removes dust, impurities, short fibers to produce continuous strand of sliver. This is achieved by passing the fibers between differentially moving surfaces covered with card clothing. The word is derived from the Latin “CARDUUS” meaning thistle or teasel, as dried vegetable teasels were first used to comb the raw wool.

Actions in carding machine:

I . Stripping action: when two close surfaces have same wire direction but their speed direction is opposite to each other, then the action between two surfaces is called stripping action. Opening and cleaning of fibers is done by this action.

Action between taker in and cylinder
Wire direction same
Speed direction opposite
Face to back arrangement of wires

II . Carding action: If two closed surfaces have opposite wire direction and their speed direction is also opposite to each other, then the action between two surfaces is known as carding action. Opening to individual fibers and neps removal is done by this action.

Action between cylinder and flat
Wire direction opposite
Speed direction opposite
Face to face arrangement of wires

III . Doffing action: when two close surfaces have opposite wire direction and their speed direction is also opposite to each other, then the action between two surfaces is known as doffing action. Web formation of fibers is done by this action.

Action between Cylinder and doffer
Wire direction opposite
Speed direction opposite
Face to face arrangement

Difference among carding actions:

	Stripping action	Carding action	Doffing action
Action occurs	Taker in & cylinder	Cylinder & flat	Cylinder & Doffer
Wire Direction	Same	Opposite	Opposite
Speed Direction	Opposite	Opposite	Opposite
Wire arrangement	Face to back	Face to face	Face to face
Function	Opening & cleaning of fibers	Opening into individual fiber & removing of neps	Web formation