棉纺罗拉牵伸的发展和展望

为了优选并创新罗拉牵伸系统,追溯了环锭纺细纱机牵伸系统的发展历程,分析了建国以来牵伸系统在牵伸装置、加压机构、集聚纺装置、罗拉及其传动机构、胶辊、胶圈、胶圈销及压力棒和吸棉装置等方面的发展进步;阐明罗拉牵伸的缺陷,即:摩擦传动滑溜、胶圈内凹、周期性机械波、扭振恶化等;分析取消上胶圈,采用磁力加压装置的现状并进行展望。指出:传统纺织技术应跟上时代发展,积极采用新技术、新工艺、新设备、新器材,实现纺纱技术的自动化、智能化、信息化、数字化和连续化。

摩擦包芯纱织物性能的研究

文章对棉包涤纶长丝摩擦纱、棉包锦纶高弹丝摩擦纱、棉包锦纶全牵伸丝摩擦纱以及棉包粘胶长丝摩擦纱的平纹织物的性能进行了试验研究,并将它们与纯棉环锭纱和纯棉摩擦纱的平纹织物的性能进行了比较和分析。研究结果表明,棉包涤纶长丝摩擦纱织物和棉包锦纶高弹丝摩擦纱织物在服用、舒适性等方面均优于环锭纱织物。这两种摩擦包芯纱织物作为服用织物将具有良好的发展前景。

The Mechanism of Eliminating Drafting Waves in Spinning

The mechanism of the staple yarn's drafting waves during roller drafting is analyzed in this paper.It's concluded that the dynamic friction coefficient is greater than the static friction coefficient on the friction behavior of fibers,and the difference is largely responsible for the "stick-slip" motion of fibers which causes the drafting waves during drafting.In this paper,it's expected that when a high frequency undulating wave is imposed on the fiber strand in the drafting zone of roller system,the friction among fibers is dominated by the dynamic friction rather than the static friction,and thus the "stick-slip" motion will be eliminated.As a result,the fiber binding effect causing drafting waves can be significantly reduced.This hypothesis is verified by an experiment,and it can be applied in developing new spinning drafting device.