Theoretical research of spinning triangle division on spun yarn torque

Abstract

Purpose

The purpose of this paper is to theoretically study the effects of ring spinning triangle division on spun yarn torques.

Design/methodology/approach

The case that the spinning triangle is divided into two parts, primary triangles and final triangle, is investigated. Theoretical model of yarn torque was given by linking the fiber tension in the spinning triangle to yarn torque under the assumption that the arrangement of fibers (substrands) in the substrands (yarn) is hexagonal close packing. Then, as an application of the proposed method, 14.6tex cotton yarns were taken as an example for the numerical simulations.

Findings

The fiber tensions in the divided spinning triangles and corresponding yarn torques were simulated numerically by using MATLAB software. The effects of division proportions and number of primary triangles on spun yarn torques are analyzed theoretically.

Originality/value

It is shown that suitable spinning triangle division is benefit for reducing yarn torque.

Citation

Su, X. and Liu, X. (2019), "Theoretical research of spinning triangle division on spun yarn torque", International Journal of Clothing Science and Technology, Vol. 31 No. 6, pp. 839-855. https://doi.org/10.1108/IJCST-01-2019-0004