竹节纱的数控纺纱原理及其捻度分布规律研究

为探究竹节纱捻度的影响因素以及分布规律,介绍了三通道数码细纱机纺制竹节纱的原理以及数码纺竹节纱的纱线结构。分析了竹节纱的捻度分布机制,借助于竹节纱杆件模型,从理论层面分析了竹节纱捻回分布的影响因素及其规律。基于数码竹节纱的螺旋状结构,测试了不同竹节倍率、不同设定捻度及不同竹节长度与基纱长度比值下的竹节两端每厘米内的捻回数,实验揭示并验证了不同影响因素对竹节纱捻回分布的影响规律,即竹节部分的捻回数小于设定捻度,基纱部分某一位置会出现较高捻度,然后趋于设定捻度。实验出发现:基纱部分容易出现过捻现象,因此竹节纱生产时,在保证竹节部分强力条件下,捻度应偏低设置。

Study on the principle of numerically controlled spinning and twists distribution of the spub yarn

In order to investigate the influencing factors and distribution of slub yarn, the principle of spinning slub yarn by three-channel digital spinning machine and the yarn structure of digital slub yarn were analyzed.The mechanism of slub distribution of slub yarn was analyzed. The factors influencing the distribution of slub yarn and its influence laws were analyzed theoretically according to the slub yarn bar model. Based on the spiral structure of digital slubby yarn, the number of twists per1 cm at the two ends of the bamboo section under different slub rates, different set twists, and different slub lengths and base yarn length ratios were measured.The experiment revealed and verified the influence of different influencing factors on the distribution of slub yarn.It was found that the number of twists in the slub section was less than the setting twist.There was a higher degree of twist occurs at a certain position in the base yarn, and then it tended to be the setting twist degree.The results showed that the part of the base yarn was prone to over-twisting.Hence, in the production of the slub yarn, the setting of twist should be lower under the premise of the slub strength.