基于切断称重法的细纱机牵伸区内纤维变速点分布研究

为探究细纱机牵伸区内纤维的变速点分布,以纺制29.2、22.4、18.2 tex棉纱为例,采用CCZ-X三罗拉双区牵伸细纱机进行纺纱实验,采用等长切断称重法对牵伸区内须条的质量分布进行测试,以其质量变化分布表征变速点分布,得到质量变化折线图,对比分析纤维在牵伸区内变速集中的位置,从而探究牵伸区内纤维变速规律。结果表明:等长切断称重法可得到牵伸区内纤维变速点分布的位置;在此次牵伸区内纤维变速点分布实验中,须条中的纤维在距前罗拉钳口线20 mm处变速相对集中,且在一定范围内随着前区牵伸倍数的增大,纤维变速点的位置变得不稳定、分散,且远离前罗拉前钳口。

Investigation on distribution of fiber accelerated points in drafting zone of ring spinner based on cut-weighing method

The distribution of fiber accelerated points in the drafting zone of the ring spinning frame was studied. 29.2, 22.4 and 18.2 tex cotton yarns were spun on the CCZ-X three-roller dual-zone drafting spinning frame, and corresponding quality distribution of the strands in the drafting zone were tested by equal length cutting and weighing method. The quality change distribution of the strands in the drafting zone of the ring spinning machine was used to characterize the distribution of accelerated points, and corresponding distribution lines of fiber accelerated point distribution in the drafting zone for the three yarns are obtained and analyzed. The results show that the equal length cutting and weighing method can obtain the position of the fiber accelerated point distribution in the drafting zone. In this experiment of fiber accelerated point distribution in the drafting zone, the fiber in the strands is found to be relatively concentrated at a distance of 20 mm from the front jaws of the front roller. With the increase of the draft ratio in the front zone, the position of the fiber accelerated point becomes unstable and disperse, and away from the front roller front clamp mouth.