Method and apparatus for false twist spinning

摘要

A novel false twist spinning process in which a sliver (60) is twisted by a mechanical force-twisting device (58) between the front rollers (54) of the drafting unit (51) and the draw off rollers (59). The spinning tension is so adjusted that the false-twisted sliver (60) is prevented from assuming a helical shape and a balloon shape at least in the zone between the nip line (10) of the drafting unit (51) and a yarn guiding element (55) disposed before the false twisting device. In an apparatus for the practice of the process, the mechanical false twisting device (58) comprises discs (58A) or aprons (58B) and the yarn guiding element (55) comprises of a false twisting nozzle (55A, 55B).