High Drafting Systems for Fine Count Drawing
topic
High drafting draw frames using 4-over-4 roller systems with twin apron main drafting zones achieve total draft ratios of 8 to 12 compared to 6 to 8 in conventional 3-over-3 systems, enabling single-pass count reduction from card sliver to fine drawing sliver without the intermediate passage drawing that adds machine investment, floor space, and handling stages in conventional two-passage drawing room layouts.
Role
Reduces drawing room machine investment and operating cost by achieving required count reduction in fewer drawing passages, with high draft systems enabling direct count reduction from card sliver to finished drawing sliver in applications where sliver quality requirements allow single-passage drawing, eliminating the second drawing passage investment in combed cotton and synthetic fibre preparation.
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