关键词: 调线机构, 垫纱工艺, 高速相机, 运动轨迹

Abstract: The yarn laying process of the seamless underwear machines’yarn adjusting mechanismdirectly affects whether the knitting needle can hook the yarn stably, and then affects the quality of the knitted fabric. As for the yarn leakage and even the needle firing during the yarn adjustment process of the existing seamless underwear machines, the main reason is that the knitting needle participates in the knitting prematurely when the yarn is adjusted and the fingers are changed. The time required for the yarn adjusting fingers to enter the safe yarn area alternately lacks quantitative research. In order to solve this problem, the reliable lay-up height range of eight groups of yarn adjusting fingers was calculatedaccording to the geometric relationship between the yarn adjusting mechanism and the yarn, and time required for each group of yarn adjusting fingers to safely enter the yarn laying area after changing was calculated by combining the longitudinal movement trajectory of the eight groups of adjusting fingers taken by the high-speed camera. The results provide a theoretical and experimental basis for the improvement of yarn adjusting mechanisms in the future.

Key words: yarn adjusting mechanism, yarn laying process, high-speed camera, motion trajectory