A mechanical model of yarn twist blockage in rotor spinning

This paper presents a mechanical model in which dynamic equilibriums of for ces and moments are considered. This model is able to quantitatively descri be twist distribution in the frictional contact zone inside a rotor in term s of yam:, machine, and operational parameters. Four cases of the applicati on of this model are discussed. Three terms--the deviate angle, yarn tensio n, and yam twist blockage--are given as functions of the wrap angle, contac t surface factor, torsional factor, and rotary speed factor.