Effect of Pressure Bar in the Break Drafting Zone of SKF Drafting System on Quality Spun Yarn and Optimum Drafting Conditions
When two pressure bars are fitted in the break drafting zone, the frictional force field is extended forward, the drafting force is increased, the untwisting of the twisted roving will decreases, the floating distance of fibers will decreases, and the quality of spun yarn is improved. For improving quality of spun yarn, the break draft ratios of SKF drafting system have to be changed when two pressure bars is fitted. When the break draft ratios is too low, the twisted roving cannot be sufficiently draft in the break drafting zone, resulting in thick places in the spun yarn. When the break draft ratios are too great, a drafting wave in the drafting roving is caused, and the quality of spun yarn is influenced. The results of our investigations reveal that a the break draft ratio of 1.35 and a 51mm roller settings are the optimum spinning conditions for the roving of 0.545g/m and 109 twist multipliers.
REN Jiazhi YANG Yuguang
College of Textiles, Zhongyuan Institute of Technology, Zhengzhou 450007, China
国际会议
上海
英文
140-143
2009-05-27（万方平台首次上网日期，不代表论文的发表时间）