DYNAMIC ANALYSIS OF SPINNING TRIANGLE IN A MODIFIED LOW TORQUE RING SPINNING SYSTEM

Ring spinning is the most important spinning system of making high quality spun yarns in the textile industry. In the past few years, a modified ring yarn spinning technology has been developed by incorporating a false twisting device into conventional ring frame to produce a low torque and soft handle singles ring yarn. In this paper, a theoretical investigation is carried out to study the dynamic behavior of the modified yarns in the yarn forming region, namely the modified spinning triangle between the front roller nip and the yarn twisting point, by considering the fiber tension and yarn spinning tension from the false twisting device. Governing equations derived by the energy method for the spinning triangle are established and the fiber tension distribution under a steady spinning condition is numerically simulated, in which influences of various spinning parameters of the modified system on the fiber tension distribution are discussed.