A Post-processing Method of Gradient Friction-Wrapped Yarn Hairiness

Abstract

The invention relates to a post processing method of gradient friction-wrap of yarn hairiness, belong to textile processing technology. Set gradient yarn hairiness looping device on the route on which multiple fibrous yarn lines operation, the yarn goes into the hollow cone where the gradient yarn hairiness looping device rotates at a high speed, under negative pressure of orientated aspiration channel. Under negative pressure of the oriented aspiration channel, yarn hairiness stretches and wraps in oriented-direction, and then repeats the oriented-directional stretching and wrapping; then the completely-wrapped yarn, after being extruded in the yarn groove and being heating shaped under high temperature, the progressive yarn wrapping structure is fully shaped, achieving the technique of complete gradient wrapping of yarn hairiness, and the technique of full shaping of yarn structure, solving the problem that the yarn hairiness cannot wrapped completely, or the twining structure on surface of the yarn becomes loose, or bounce-back of yarn hairiness in follow-up processing. The method is easy to operate, suitable for mass application.

Description

technical field [0001] The invention relates to a post-processing method for gradient friction wrapping yarn hairiness, which belongs to the technical field of textile processing. technical background [0002] Hairiness is one of the important indicators to measure the quality of yarn. Yarn hairiness not only affects the production efficiency of weaving, knitting and other post-processes, but also affects the appearance quality of the final product. Especially today, when high-speed shuttleless looms are widely used, reducing yarn hairiness is of great significance. [0003] Yarn hairiness occurs in the spinning process. The mechanism is that after the end of the fiber transferred from inside and outside is exposed to the yarn body, it breaks away from the grip of the jaws and cannot re-enter or wrap around the main body of the yarn body, forming hairiness. The hairiness increases in the winding and warping process. The root cause is that there are many hairiness on the sur...

AI Technical Summary

Problems solved by technology

[0007] It can be seen that the above-mentioned yarn hairiness control for the yarn use process such as winding, warping, knitting, etc., the common point of the existing methods is: false twisting or air blowing of the yarn under the condition of not actively holding the head end of the hairiness Wrapping, winding most of the hairiness protruding from the surface of the yarn in a loose form, and sticking to the yarn surface, the dense structural connection between the hairiness fiber and the yarn body cannot be formed, and the reduction of hairiness can only be achieved visually ;Aiming at the form of untwisting-twisting, in the process of attaching hairiness, the local twist of the yarn is dynamically transferred and redistributed, and the weak twist appears, which is easily stretched by the yarn tension and deteriorates the evenness of the main body of the yarn

More importantly, in the subsequent process, as the yarn is rubbed by the machine parts, the fibers that are loosely wound and attached to the surface of the yarn are easy to protrude out of the surface of the yarn again to form hairiness, which is harmful to the yarn in the subsequent process. The processing of the process and the quality of the final product (especially the quality of knitted products) have not improved substantially

[0008] In view of the above problems, the Chinese patent number is ZL 201410204503.0, and the publication date was May 15, 2014. The name of the invention is a method for actively holding and rotating the surface layer of the yarn. Hold the hairiness on the surface layer of the yarn, and at the same time tightly wind the holding hairiness on the yarn trunk; however, there are the following technical problems in the method of holding and rotating the hairiness by negative pressure suction: First, due to the tapered holding surface along the It has a negative pressure holding function throughout the whole week. For the relatively thick and hard yarn hairiness, and the connection between the hairiness and the main body of the yarn body is relatively fragile and short, the tapered holding surface is often blocked by broken thick and hard fibers during the treatment process. In addition, the flying flowers in the workshop are attached to the mesh, and the fibers attached to the mesh cannot be centrifugally thrown out and removed, so that the holding effect of the tapered grip on the surface of the yarn is greatly weakened, and even Loss, cannot satisfy the function of continuously and effectively holding the hairiness on the surface of the wrapping yarn; secondly, when the hairiness is wound onto the yarn body, it rotates at a high speed perpendicular to the yarn trunk at the winding place and winds onto the yarn trunk, which not only has no effect on the hairiness It can be wound on the yarn body with a large pitch, but the yarn strength cannot be greatly improved, and the yarn hairiness is often gathered and entangled on the yarn body, resulting in a substantial increase in yarn defects such as thick places and neps, and the corresponding fabric appearance Defects also increase; third, the conical holding surface rotates once, and the hairiness can only be wound around the yarn body once. If the hairiness wrapping efficiency is improved, the rotation speed of the conical holding surface needs to be greatly increased, which increases energy consumption and rotation speed. The components are worn out, and the function of high-efficiency winding yarn hairiness under the action of low-rotation components cannot be realized yet; Fourth, due to the use of a single negative pressure and a conical gripping surface at a rotational speed, the negative pressure gripping and wrapping of the yarn surface hairiness, Only one-time hairiness wrapping with the same tightness can only be performed on hairiness, and the technical effect of progressive complete wrapping with a gradient of tightness cannot be achieved

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