Forecasting of Structural Parameters of Hollow Spindle Yarns

Abstract

A study deals with hollow spindle yarns that are made by one process technology. Such yarns have the special structure of three components with deliberately introduced irregular characteristics in diameter. The effect intermediate product of investigated hollow spindle yarns consists of the two yarns or of the three yarns. Analysing geometrical model of hollow spindle yarns the main precondition about the circle shaped cross-section of effect intermediate product was done. The structural and geometrical parameters influencing geometrical model of hollow spindle yarns are identified. It is presented that the coil length of the binder yarn is determined by the structural and geometrical indices of the components and the manufacture parameters of hollow spindle yarn. Hollow spindle twisting machine was used to produce different types of yarn varying in manufacture parameters as well as in raw material and linear density of the components. The predicted results and experimental data of the binder component coil length are presented. The good agreement between the theoretical calculations and experimental results wasbtained.