Selection of speed for each process of spinning equipment
(1) Cleaning machine: The speed of the rolling roller is generally 10~15r/min. When spinning thick special yarns and fine special yarns, the speed should be lower. The former is due to higher raw cotton impurities, and the latter is due to higher yarn quality requirements; the speed of the rolling roller for spinning medium special yarns can be slightly higher; spinning polyester or For other chemical fiber yarns, due to the small cohesion between fibers, the rolls are loose and easy to wither, so the speed should be lower. (2) Carding machine: The speed of the carding machine doffer should be determined according to the equipment model, card sliver quantity, output and quality requirements. The speed increases and the output increases, but it is not conducive to carding and impurity removal, the number of equipment is reduced, and it affects the quality of carding slivers and the potential of post-spinning production. When spinning medium-sized special yarns, the doffer speed can be higher. When spinning fine special yarns and chemical fiber yarns, the doffer speed should be lower. The doffer speed of the new carding machine can reach up to 90r/min. (3) Draw frame: The output roller speed should be determined according to the type of finishing fiber, fine spinning yarn density, etc. Generally, the speed of the first-pass draw frame is slightly higher than that of the second-pass and third-pass draw frames; the speed when spinning cotton fiber is slightly higher than that of chemical fiber; the speed of pre-draw frame is slightly higher than that of post-combing draw frame or mixed draw frame; general Carded yarn is slightly higher than combed yarn; medium and thick special yarns are slightly higher than fine special yarns. (4) Sliver rolling machine: The rolling speed should be determined according to the machine model and the output of the combing machine. Generally, one strip winding machine and 4-6 combing machines are used together.
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