Experimental Investigation of Yarn Twist Blockage

In twisting a yarn running over a guide surface, the twist inserted into the part in front of the guide is impeded to transmit freely to the part behind the contact zone. A new device has been set up for investigating twist blockage and yarn torque - twist simultaneously. Measurements of twist blockage in relationship to different parameters have been carried out by using a monofilament yarn and a multifilament yarn. The factors under consideration include the wrap angle, yarn tension and input twist.

气流槽聚型集聚纺纱条捻度传递的力学分析

为深入了解集聚纺纱系统,提高纱线的品质性能,重点探讨气流槽聚型集聚纺纱系统的捻度传递机制,介绍气流槽聚型集聚纺纱系统的结构特点,分析捻度传递过程中的纺纱张力变化,给出纺纱张力的求解过程,分析纱条在捻度传递过程中外力产生的阻力矩,及其与纱线自身回转产生的扭矩的关系。研究结果表明:纺纱张力、吸气管负压以及集聚罗拉的结构参数对纱条捻度的上传有一定的影响;通过调整纺纱张力与吸气管负压可以保证该系统所纺纱线的品质。