Double leather collar yarn guiding method and device of roller drafting mechanism

Abstract

The invention discloses a double leather collar yarn guiding method of a roller drafting mechanism. In the roller drafting mechanism, a middle roller jaw pulls a fiber sliver fed from a rear roller; the middle roller drives a middle top roller and an upper leather collar, and a lower leather collar is driven to rotate through the friction of the upper leather collar; the upper leather collar and the lower leather collar form a double leather collar yarn guiding channel under the support of an upper apron and a lower apron; and under the elastic support of the upper apron and the support of thelower apron, the upper leather collar is elastically pressed on the lower leather collar to form the elastic control of the double leather collars on the fiber sliver in the double leather collar yarn guiding system.

Description

technical field [0001] The invention belongs to the technical field of ring spinning, and relates to a method and a device for drawing yarn with double aprons of a roller drafting mechanism. Background technique [0002] The main drafting area of ​​the roller drafting mechanism of the spinning machine generally adopts the upper and lower double aprons to draw the yarn, so that the fibers in the fiber sliver are controlled by the friction boundary formed by the upper and lower aprons during the speed change process, and the fiber sliver is uniformly drawn. , the control of the fiber in the main drafting zone is very critical to the yarn formation. The traditional double apron elastic yarn drawing has a good control effect on the fiber sliver, but at the same time, the traditional double apron form, the apron-covered The relative driving load of the roller is relatively large, and the lower apron is set on the middle roller. To replace the lower apron, the middle roller needs ...

AI Technical Summary

Problems solved by technology

[0002] The main drafting area of ​​the roller drafting mechanism of the spinning machine generally adopts the upper and lower double aprons to draw the yarn, so that the fibers in the fiber sliver are controlled by the friction boundary formed by the upper and lower aprons during the speed change process, and the fiber sliver is uniformly drawn. , the control of the fiber in the main drafting zone is very critical to the yarn formation. The traditional double apron elastic yarn drawing has a good control effect on the fiber sliver, but at the same time, the traditional double apron form, the apron-covered The relative driving load of the roller is relatively large, and the lower apron is set on the middle roller. To replace the lower apron, the middle roller needs to be disassembled. Around the improvement of the yarn drawing method, it is also a technology that people continue to control the rope, such as the patent application CN201110385309.3 "a A special-shaped rod curve drafting device" proposes to replace the lower apron with a braided ring, and the patent application CN201310631289.2 "Drafting device in spinning frame" proposes to set a negative pressure tube in the main drafting area. These ideas are all very important. To a certain extent, in the traditional double apron structure, the friction force formed by the yarn delivery system on the fiber is changed, and it is difficult to maintain the excellent characteristics of the traditional double apron yarn delivery system for fiber control.

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