Spinning Technology with Large Draft on Spinning Frame

Abstract

The invention discloses a large-draft spinning process of a spinning frame, which is suitable for roving weight quantification and large-drawing spinning process of spun yarns, and one or more rovings are fed into the drafting system of the spinning frame in parallel, and is suitable for spinning spun yarns with a linear density 6‑60tex, the feeding roving weight is 600‑1200tex, drawn in a parallel state, the total draft ratio of the spinning frame is 20‑100 times, wound on the bobbin to form yarn after drafting and twisting; for cotton staple fiber For spinning, the metric twist coefficient of the roving is 100‑160, the maximum holding distance of the spun yarn front area is 45‑50 mm, the maximum holding distance of the spun yarn rear area is 65‑75 mm and the draft ratio of the small rear area is 1.10‑1.18 times. The performance of the entire drafting system can be optimized due to the reasonable configuration of process parameters, the range of suitable spinning linear density is wider, the basis weight of roving is larger, and the total draft ratio of 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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