基于大直径软胶辊的细纱牵伸机制及其应用效果

为提高成纱质量和降低能耗,采用大直径软胶辊的细纱牵伸元件配置,并对其牵伸机制与应用效果进行分析。改变牵伸区胶辊的尺寸和用材,并配置合理的工艺参数,通过加大罗拉隔距、中上罗拉使用低硬度丁腈橡胶胶辊代替MR碳纤辊并增大胶辊直径,可减轻摇架压力,在提高成纱质量的基础上达到节能的目的。采用改进后的细纱机生产不同线密度的纱线,研究随着细纱牵伸倍数的增加,轻加压条件下采用大直径软胶辊牵伸对成纱质量的影响。试验结果表明:细纱牵伸区采用大直径软胶辊配置对重定量的粗纱,大牵伸与超大牵伸细纱、赛络纺纱线等品种,更能体现其优势,成纱的细节明显减少,同时也可解决细纱特殊机械波问题。

Drafting mechanism and application of spun yarn produced by large diameter soft rubber-covered roll

In order to improve the yarn quality and reduce the consumption, new drafting elements such as large diameter soft rubber-covered rolls were used in the production of spun yarn. The drafting principle and application mechanism were analyzed. By using large diameter soft rubber-covered rolls, configuring reasonable process parameters, increasing the roller distance and using the central-top roller with low tenacity the butadiene-acrylonitrile rubber-covered roll instead of the MR carbon fiber roller and increasing the diameter of roller, and the pressure on the cradle is reduced, and the purpose of energy saving on the basis of improving the yarn quality was also achieved. Through the different production of yarns with spinning frame, the change of the yarn quality under the condition of light pressurization of the large diameter soft rubber-covered roll was studied with the increase of the draw ratio of the yarn. The results show that the large diameter soft rubber-covered roll of the spun yarn has better advantage in heavy basis roving, the large and superhigh drafting of spinning, the Siro-spinning and other varieties. Yarn detail is significantly reduced. At the same time, it can also solve the special mechanical wave problem of the spun yarn.