Licker-In Zone and Waste Elimination
topic
The licker-in is a cast roller (~250 mm diameter) with saw-tooth clothing, operating at 800–2,000 rpm for cotton. It combs through a fairly thick fibre fringe at ~21 m/sec (76 km/h) with a draft exceeding 1,600, passing ~600,000 wire points per second. More than 50% of all fibres pass to the main cylinder as tufts, slightly less than 50% as individual fibres. Waste elimination occurs via mote knives and carding segments beneath the licker-in.
Role
The licker-in performs by far the greatest part of opening and cleaning. The transfer factor to the main cylinder should be about 1:2 (draft slightly more than 2). Modern high-performance cards use carding segments instead of grids under the licker-in to handle high throughput.
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