Abstract:

In order to improve the yarn quality and reduce the consumption, new drafting elements such as large diameter soft rubber-covered rolls were used in the production of spun yarn. The drafting principle and application mechanism were analyzed. By using large diameter soft rubber-covered rolls, configuring reasonable process parameters, increasing the roller distance and using the central-top roller with low tenacity the butadiene-acrylonitrile rubber-covered roll instead of the MR carbon fiber roller and increasing the diameter of roller, and the pressure on the cradle is reduced, and the purpose of energy saving on the basis of improving the yarn quality was also achieved. Through the different production of yarns with spinning frame, the change of the yarn quality under the condition of light pressurization of the large diameter soft rubber-covered roll was studied with the increase of the draw ratio of the yarn. The results show that the large diameter soft rubber-covered roll of the spun yarn has better advantage in heavy basis roving, the large and superhigh drafting of spinning, the Siro-spinning and other varieties. Yarn detail is significantly reduced. At the same time, it can also solve the special mechanical wave problem of the spun yarn.

Key words: spinning technology, spinning drafting, parts configuration at draft zone, rubber-covered roll with large diameter, efficient spinning process, large drafting