关键词: 变速点分布, 超大牵伸, 成纱条干, 牵伸倍数分配

Abstract:

In order to explore the dffect of the enhancement of the drafting multiple and the collocations of drafting multiple on yarn unevenness, the experiment of the accelerated-distribution is presented. The yarn evenness is analyzed by the change of fibers accelerated-point distribution. Firstly, 9.7 tex cotton yarn was taken as example, and the accelerated-point distribtion of the front draft zone of ring spinning frame and super high drafting ring spinning frame were compared. Then, 9.7 tex, 7.3 tex and 6.5 tex cotton yarns were spun on the super high drafting ring spinning frame with the heavy weight 1000 tex of the roving. Lastly, 9.7 tex cotton yarn was taken as example, under the different collocations of drafting multiple, the accelerated-point distribution of the front draft zone was explored. The results indicate that the accelerated-oint distribution of the super high drafting ring spinning frame is more centralized and stable and fronted than ring spinning frame, and the yarn evenness is better. And along with the increasing of the drafting multiple, the accederated-point distribution is more dispersed and the yarn evenness is worse. Moreover, 9.7 tex cotton yarn is spun on 1.1 back draft and 1.3 intermediate draft, the accelerated-point distribution of the front draft zone is the most centarlized and fronted, and the yarn evenness is the best.

Key words: accelerated-point distribution, super high drafting, yarn evenness, collocation of drafting multiple