Gill Boxes in Worsted Preparation Drawing
topic
Worsted gill boxes use faller gills, pin rows, or intersecting gill bars moving through the drafting zone between nip rollers to control fibre movement during drafting of long wool and speciality fibres, preventing the fibre buckling and drafting wave formation that would occur in roller drafting without fibre control between nip points separated by long roller gauges required for long staple fibres.
Role
Provides the fibre control mechanism essential for drafting long wool, cashmere, and top fibres in worsted preparation where roller gauges must be set wider than the fibre length to accommodate the longest fibres but require intermediate fibre control to prevent short fibre drafting irregularities that would generate the yarn evenness defects characteristic of inadequately controlled long-fibre drafting.
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