High-draft spinning technology of spinning frame

Abstract

The invention discloses a high-draft spinning technology of a spinning frame and is applicable to big ration of roving yarn and a spun yarn high-draft spinning technology. One or more pieces of roving yarn are parallelly fed into a drafting system of the spinning frame, the spinnable spun yarn density is 6-60 tex, the ration of the fed roving yarn is 600-1,200 tex, the roving yarn is drafted in parallel state, the total draft multiple of the spinning frame is 20-100 times, and the roving yarn winds around a spool for yarn forming after drafting twisting; for cotton-type staple fiber spinning, the metric twist factor of the roving yarn is 100-160, a front-zone large gripping distance of spun yarn is 45-50 mm, a back-zone large gripping distance of the spun yarn is 65-75 mm, and the small back-zone draft multiple is 1.10-1.18 times. The whole drafting system performance can be optimized by the aid of reasonable configuration of technological parameters, the spinnable spun yarn density range is wider, the ration of the roving yarn is bigger, and the total draft multiple of the spun yarn is larger.

Description

technical field [0001] The invention relates to a large draft spinning process on a spinning frame, in particular to a large draft spinning process of the drafting system of a three-roller double-apron spinning frame for cotton spinning. Background technique [0002] The technological development direction of the application of modern spinning equipment is to increase the output of each process on the basis of improving and stabilizing the quality of each process, so as to improve production efficiency, reduce equipment configuration, and achieve double reduction of investment and operating costs. There are two main ways to increase the output of each process. One is to increase the production speed, that is, the speed of the rollers and spindles of the spinning equipment. This is mainly limited by the hardware status, and the increase in speed is a sensitive factor to quality; Quantification of semi-finished products requires a breakthrough in process technology. Quantific...

AI Technical Summary

Problems solved by technology

[0009] The method of controlling the movement of strands in the drafting area by a frictional force field other than the existing large drafting process has some disadvantages that are difficult to overcome under the current technical conditions, such as heavy pressure, tight gauge, strong control, small roving twist coefficient, relatively low Unstable control force brought about by process configuration such as large rear area drafting, drafting force is in a critical state relative to control force, large rear area draft exceeds the untwisting effect after elastic finishing drafting, low-twisted strands in the front area Easy to diverge, the control element makes the whiskers tend to be flattened, heavy pressure makes the top roller easy to deform and wear, the power consumption of the drafting drive increases, the middle roller is prone to torsional vibration, the wear of the drafting equipment is aggravated, and the life of the drafting equipment is shortened, etc.

[0010] It is mainly reflected in the quality of the yarn: higher yarn hairiness, slightly lower strength; deterioration of consistency between spindles, linear density CV b Increase; frequent defects improved, occasional defects worsened, cloth surface effect is not ideal, etc.

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