Theoretical study of fiber tension distribution at Solospun spinning triangles

Spinning triangle is a critical region in the spinning process of staple yarn. Its geometry influences the distribution of fiber tension in the spinning triangle and affects the properties of spun yarns. Taking appropriate measures to influence the spinning triangle geometry and improve the quality of yarn has attracted great interesting recently. Solospun technology is one of the most important representatives, which is implemented by dividing ring spinning triangle into several small primary triangles and one final triangle using a Solospun roller. Therefore, theoretical study of fiber tension distributions at Solospun spinning triangles is presented in this paper. First, a theoretical model of the fiber tension distributions in Solospun spinning triangles is given by using the principle of minimum potential energy. Second, the relationships between fiber distributions and spinning triangle parameters are analyzed theoretically. Especially, the effects of horizontal offset of the twisting point to triangle symmetric axis of nip line d on fiber tension distributions are discussed and numerical simulations are given. Finally, the properties of spun yarns are evaluated and analyzed by using the simulation results.