Improvement of product drafting process in drafting devices of the spinning machines with the application of straps

Abstract

This paper covers the analysis of operation drafting devices of the spinning machines, the technological requirements for the processes of product straightening, product drafting, straightening and parallelization of fibers and the basic theoretical prerequisites. The main geometrical parameters of design of drafting pairs, their interaction, influencing factors as the process of yarn formation after drafting, with the use of straps, are considered. Analysis of the operation of the existing design of drafting devices of technological machines of spinning production has the following disadvantages: low reliability and service life of rubber straps, insufficient strength characteristics and elastic-mechanical properties of the frame element made of technical cotton fabrics. It is necessary to select a pair of straps that meets all the requirements of conditional operation of a pair of straps as a frame element for the upper and lower straps made of thin-layer metal fabric made of metal thread, make adjustments to additional calculations of the design parameters of the drafting devices, taking into account the straps made with a thin metal fabric base.