Lifting type tail yarn retaining device and control method

Abstract

The invention provides a lifting type tail yarn retaining device. The lifting type tail yarn retaining device comprises a winding drum driving roller and a reciprocating yarn guide device; the tail yarn retaining device is arranged on the portion, close to the tail yarn retaining section of the end of a yarn winding drum, of the upstream part of the reciprocating yarn guide device; the tail yarn retaining device is provided with a lifting stop lever capable of ascending and descending; the lifting stop lever is higher than a common tangent line between a yarn guide plate and the winding drum driving roller when ascending, so that yarn is blocked from moving transversely; and the lifting stop lever is lower than the common tangent line between the yarn guide plate and the winding drum driving roller when descending, so that the yarn can be released. During use, time parameters of tail yarn remaining are set through calculation, and the lifting stop lever descends after the time of tail yarn remaining is over, so that the transverse position of the yarn is avoided; and the operation of automatically adjusting the tail yarn retaining length of the yarn is achieved. According to the lifting type tail yarn retaining device and the control method, automatic tail yarn retaining operation can be conveniently achieved, and the tail yarn retaining length can be freely set according to yarn varieties and customer requirements by setting the lifting time.

Description

technical field [0001] The invention relates to the field of twisting machines, in particular to a lift-type tail yarn retaining device and a control method. Background technique [0002] Tailing yarn refers to the operation of winding the untwisted waste silk directly on the end of the yarn drum when the yarn is wound on the yarn drum, so that subsequent users can distinguish where to start It is a qualified twisted yarn to ensure the quality of the final product. Chinese patent document 201922199294.6 describes an automatic yarn tailing device, which is to realize the function of automatic yarn tailing by locking the yarn in the thread groove and bringing the yarn from the bottom to the top by the helical movement of the threaded sleeve. In this method, the size of the threaded sleeve is affected by the amount of tail yarn left, and there is a space limitation in the design, and only a fixed length of tail yarn can be collected. CN 204023045 U has recorded a kind of two-...

AI Technical Summary

Problems solved by technology

In this method, the size of the thread sleeve is affected by the amount of tail yarn left, and there are space limitations in the design, and only a fixed length of tail yarn can be collected

CN 204023045 U has recorded a kind of two-for-one twister equipped with tailing yarn device, and the structure of limit post is set for tailing yarn, but needs to manually operate the rotating sleeve to release yarn, which takes more manual operation time and does not Suitable for large-scale automated workshops

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