环锭细纱机后区牵伸与纱线不匀率之间的关系

The Relationship between Yarn Irregularity and Back Draft on the Ring Frame

本文讨论了环锭细纱机后区牵伸与纱线不匀率之间的关系。为此安排了专门的试验，由试验所得的数据，建立了两个回归方程。方程指出，当后区牵仲小于1．2时，随着后区牵伸的增加，纱线不匀率是线性地减小；当后区牵伸大于1．5时，随着后区牵伸的增加，纱线不匀率按对数曲线方程增大。在后区牵伸为1．35处，不匀率为最大，故后区牵仲1．35为临界牵伸。在配置后区牵仲时，宜采用较小牵伸倍数的第一类纺纱工艺。

Thispaper discussed the relationship between yarn irregularity and back draft on the ring frame. A special test was arranged for： this purpose., Two regression eqations were built according to the data from the test. The equations show that, when the back draft is less than 1.2, The yarn irregularity is linearly dropping with the back draft being Increased. When the back draft is more than 1.5, the yarn irregularity will go up with it as a logarithmic equation. The yarn irregularity approaches to maximum at the back draft 1.35 and this is the critical draft. The less back draft, what is usually called the first kind of the spinning technology, has been adopted appropriately for the draft disposal.