Carding Technology
sub-area
The card is the central machine in short-staple spinning, opening tufts to individual fibres, eliminating 80–95% of remaining impurities, removing dust, disentangling neps, eliminating some short fibres, blending fibres, creating partial longitudinal orientation, and forming sliver (typically 4–7 ktex). Production rates have increased from 5 kg/h (1965) to about 220 kg/h for the latest generation, such as the Rieter C 60 with 1,500 mm working width.
Role
The card shows the highest correlation to both quality and productivity of any spinning machine. Two industry maxims capture its importance: 'The card is the heart of the spinning mill' and 'Well carded is half spun.' Cards and blowroom now form an integral, inseparable unit coordinated to complement one another.
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Subtopics
- Card Feed Systems and Chute Design Card feed involves pneumatic tuft delivery through one-piece chutes (simple, economical) or two-piec…
- Card Operating Zones and Fibre Processing The card processes material through distinct operating zones: licker-in zone (opening tufts, waste e…
- Card Clothing Technology Card clothing has the greatest influence on quality and productivity of all card components. New clo…
- Card Autoleveling Equipment Card autoleveling maintains constant sliver weight despite variations in material feed. Systems are …
- Card Maintenance and Grinding Systems Card maintenance involves stripping, burnishing, and grinding clothing, with grinding being the most…