Abstract:

In order to extend the product variety of ring spinning system, the mechanical structure of back rollers on ring spinning system was creatively redesigned. This new design increases the feeding nip of back rollers in one spinning unit from single to multiple, and each back roller is driven by a servo motor. The feeding speed of each nip can be respectively adjusted to realize the asynchronous feeding of several rovings. The linear density or blending ratio of the yarn spun by this system is varying along the lengthwise direction, and this spinning method is defined as Digital Spinning. Based on the Digital Spinning of three rovings, for the colored spun yarn, the digital spun yarns could be classify as melange yarn, gradient color yarn, section color yarn, slub yarn, slub color yarn and bivariate yarn, and the characteristics of these yarns were also analyzed. The advantages in flexible processing and product diversification of this spinning method are well shown.