棉精梳机分离罗拉顺转定时对棉网均匀度的影响

精梳机分离罗拉顺转定时是调整分离接合质量的重要工艺参数，分离罗拉顺转定时过早、过晚都会对分离罗拉输出棉网均匀度产生不良影响。在HC500型精梳机上，利用分离接合过程中分离罗拉速度曲线及钳板速度曲线的变化特征，分析了分离丛不同截面纤维重量分布情况及其对棉网均匀度的影响。在精梳机给棉工艺、分离隔距等工艺参数不变时，利用2mm切断称重法测试得到了分离罗拉顺转定时不同时分离丛的重量分布曲线，根据精梳机分离接合规律对不同的纤维丛进行接合，求得了精梳机输出棉网的2mm片段重量CV%。结果表明：分离丛重量分布曲线形态，决定了棉丛的搭接质量及精梳机输出棉网的均匀度；当纤维长度为29mm、落棉隔距为9.5mm、给棉长度为5.2mm、HC500型精梳机分离罗拉的顺转定时为15.5分度时，棉网2mm片段的重量CV%值最小。

Influence of foward motion timing of comber detaching roller onevenness of cotton web

Foward motion timing of Comber detaching roller is a important technology parameters to adjust quality of separation and joint. Too early or late of foward motion timing of detaching roller will lead to a bad effect on the evenness of outputting cotton web. On the HC500 comber, weight distribution of fiber in different sections and its effect on the evenness of cotton web are analyzed according to the changing characteristics of speed curve of detaching roller and nipper in the process of Separation and joint. When the technologies of feeding and separation gauge are constant, weight distribution curve of fiber bundle at different clockwise rotation are achieved by the method of 2 mm cutting-weighing and the 2 mm weight CV% of cotton-web at diffrernt foward motion timing are calculated according to the regularity of separation and joint. The results show that the joint quality of fiber bundle and the evenness of outputting cotton-web are decided for the form of weight distribution curve of fiber bundle. 2 mm weight CV% of cotton web is the lowest when foward motion timing is 15.5 index under the condition of fiber length is 29mm, noil gauge is 9.5mm and feeding length is 5.2mm.