Based on conventional ring spinning, the aim of compact spinning as an innovative spinning technology is to produce superior yarns. In this paper, according to the airflow rule in the condensing zone of compact spinning with a perforated drum, the dynamic model for simulating the fiber motion trajectory in the condensing zone is constructed and is solved by a specially designed MATLAB program. The motion trajectories of fibers placed at different initial positions have indicated the pneumatic condensing mechanism and condensing effect of compact spinning with a perforated drum.
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