Construction and analysis of a three-channel numerical control ring-spinning system for segment colored yarn

Abstract

At present, there have been a significant number of studies of segment colored yarn, and the majority of these studies have made considerable progress, which has made the types and styles of segment colored yarn more abundant. However, the problem that exists in the segment colored yarn is its relatively few kinds of color, which greatly limits its flexibility and diversity in commercial applications. To address the above problems, a multi-channel computer numerical control (CNC) ring-spinning machine was developed, and a digital spinning mechanism with online regulation of the forming linear density and blending ratio was constructed through the developed three-channel drafting mechanism and its driving and controlling system; the spinning mechanism of segment colored yarn using the time-varying three-channel drafting ratio to the spinning time-varying three-colored fiber blending ratio was established by implementing a coupling algorithm for co-drafting of multi-channel roving; the forming process and algorithm of segment colored yarn, which is used to solve the blending ratio of three colored fibers and the drafting ratio of three-channel roving based on segment color, was constructed through the digital color mixing model and the design of segment color of yarn. According to the above mechanism, three rovings with two color combinations of cyan, magenta, yellow and cyan, magenta, black were used to design and spin segment colored yarns with three, five and seven colors, respectively. By testing and analyzing the linear density, twist, unevenness, surface hairiness and tensile properties of the segment colored yarn, it is proved that the timing control of the three-channel drafting ratio based on CNC ring spinning can achieve the timing control of the blending ratio of the three colored fibers, which is beneficial to the spinning of segment colored yarn with color segment distribution.