Mechanical analysis on changing cross-sectional segment of fibre band in condensing zone in compact spinning

摘要

A mechanical analysis is made on the changing cross-sectional segment of the fibre band in the condensing zone of compact spinning. By analysing the condensing process of fibre band in the condensing zone, a mechanical model for the changing cross section is established in this article. The model further validates the fact that there exist additional twists in this part of fibre band from both theoretical and numerical points of view. Besides, the three major factors, that is, the friction coefficient between fibre band and the lattice, the underpressure and the length of suction, are also analysed, revealing that the larger the three factors are, the larger the additional twists will be.