降低成纱粗细节的理论分析和实践
2022-09-05 16:14:59   来源：   评论：0 点击：

  关键词：粗节；细节；牵伸力；握持力；临界牵伸倍数；出“硬头”；牵伸不开；牵伸隔距
中图分类号：TS101            文献标志码：B            文章编号：1001-9634(2022)03-0031-05
 
收稿日期：2021-08-08
作者简介：陈洪奎（1963—），男，山东德州人，高级工程师，主要从事棉纺织生产、纺纱设备和专件器材管理等方面的研究。
   
Abstract:In order to reduce nubs and fine ends of yarn，specific spinning theory is learned about and effective measures are adopted to improve the yarn quality.The influence factors of drafting force and gripping strength are analyzed from theory，and the causes and solutions are analyzed for why there are too many nubs，fine ends，and both nubs and fine ends.It is showed that the essence of nubs and fine ends is the mismatch between drafting force and gripping strength.A judgment is proposed for the first time that there are too many nubs in drafting zone or too many short nubs in automatic winder， which is essentially failure drafting.Through seven spinning examples，the test results after adopting the measures such us changing the apron,increasing the draft ratio of the back zone and adopting twisting spinning to reduce nubs and fine ends in spinning are analyzed in detail.The production practice shows that the reduction degree of nubs and fine ends can be analyzed by using the variation amplitude of nubs and fine ends.By analyzing the most sensitive -30% fine ends，it is concluded that -30% fine ends has great influence on yarn quality.By analyzing fine ends，the innovative viewpoint that -50% fine ends is zero is the best point to measure the rationality of the process is put forward.We should focus on controlling the nubs for course yarn more than 14.6 tex，and focus on controlling fine ends for fine yarn less than 14.6 tex.
Key Words:nubs；fine ends；drafting force；gripping strength；critical drafting ratio；hard head；failure drafting；drafting gauge 
 
参考文献：
[1] 任家智.纺织工艺与设备[M] .北京：中国纺织出版社，2004.
[2] 姚穆.纺织材料学[M] .北京：中国纺织出版社，2009.
[3] 吴兴宽.微幅波作用下的罗拉牵伸系统牵伸机理的研究[D] .上海：东华大学，2011.
[4] 陆振乾，乐峰.细纱机前区压力棒牵伸的效果及工艺优化[J] .纺织导报，2011(1)：59-61.