False twist compact spinning method and device for ring spinning and yarns spun thereby

Abstract

A false twist compact spinning method for ring spinning comprises the steps of feeding at least one roving into a roller drafting system of a spinning frame at a spindle position; twisting fiber strands from the roller drafting system through a false twisting system so that the fiber strands are falsely twisted in yarn shape; after passing a false twist point, falsely untwisting the fiber strands,pulling the fiber strands through jaws of guide-out rollers while keeping the fiber strands tensioned and bundled, and feeding boundary fibers into the jaws of the guide-out rollers under restraint;truly twisting and winding the fiber strands, which are from the jaw of the guide-out rollers, to bobbins under the rotational action of spindles, bobbins and wire rings.

Description

technical field [0001] The invention belongs to the technical field of ring spinning, and relates to a ring spinning false twist compact spinning method, device and spun yarn. Background technique [0002] Long hairiness of the yarn is usually a harmful defect of the yarn. In order to eliminate the hairiness of the yarn, the current actual production basically uses air flow to gather the fiber bundles before twisting. In the above two types of methods, the air flow method will generate greater energy consumption, and the mechanical method will cause friction; there is a false twist method in the yarn twisting technology, which is also applied in ring spinning , which uses false twisting technology to apply twists several times higher than normal spinning to the fiber strands output by the front roller, making the spinning twist triangle smaller, eliminating weak twisting, and reducing spinning breakage. The application in ring spinning, its purpose is to realize the low-twi...

AI Technical Summary

Problems solved by technology

[0002] Long hairiness of the yarn is usually a harmful defect of the yarn. In order to eliminate the hairiness of the yarn, the current actual production basically uses air flow to gather the fiber bundles before twisting. In the above two types of methods, the air flow method will generate greater energy consumption, and the mechanical method will cause friction; there is a false twist method in the yarn twisting technology, which is also applied in ring spinning , which uses false twisting technology to apply twists several times higher than normal spinning to the fiber strands output by the front roller, making the spinning twist triangle smaller, eliminating weak twisting, and reducing spinning breakage. The application in ring spinning, its purpose is to realize the low-twist spinning and flexible textile production; In the spinning method, one or two pairs of holding rollers are arranged in front of the front roller, and a false torsion tube is set between the front roller and the holding roller. Confinement is concentrated. Compared with the existing technology, this scheme has a complex structure, also requires compressed air energy consumption, and is difficult to control; Fu Jiang, Donghua University’s doctoral thesis proposed a false twister to achieve agglomeration in the spinning frame. Twist concentration spinning method, the technical scheme is to add a set of false twisting device in the drafting area between the apron nip of the drafting mechanism and the front roller to pre-twist the fiber strands so that the fiber strands are Gathering before the output of the front roller, as we all know, adding a false twister between the nip of the apron and the front roller will greatly increase the distance between the nip of the apron and the nip of the front roller, and simultaneously draft and gather fibers in the drafting area , these factors will affect the uniformity of the yarn evenness. So far, how to use the form of twisting to make it a technical means to gather fibers, eliminate hairiness, reduce energy consumption, and be easy to operate remains to be further studied.

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