SU848457A1 - Device for winding yarn onto package - Google Patents

Description

(54) DEVICE FOR WINDING THREAD NL PULKOVA

The invention relates to the manufacture of chemical fibers, namely, devices for winding a yarn on a package. A device is known for winding a yarn on a package containing a feeding pair, a package holder, a spreader with a yarn guide and stops for tensioning the yarn in places where the yarn feeder reverses tl. negatively affects the quality indicators of the winding threads. . The purpose of the invention is to improve the quality of winding. The goal is achieved by placing the stops in a triangle of the layout at a distance of one from the other, determined from the following relation B, where B is the distance between the stops, L is the length of the layout, S is the distance from the supply pair to one of the critical positions yarn feeder, K - distance from the supply pair to the stop. At the same time, each stop is made in the form of a single-arm lever with a roller at its free end. . In addition, a variant of making the stop in the form of a spring-loaded roller or in the form of a plate plate is possible. FIG. 1 shows the device, a general view; FIG. 2 shows the implementation of stops in the form of a single-arm lever with a roller at its free end; FIG. 3 - the same, in the form of a spring-loaded roller, - in FIG. 4 - the same, in the form of a leaf spring. The device has a power supply pair 1, groove 2, stops 3 and yarn feeder 4. The device operates as follows. The yarn coming from the feeding pair 1, through the limiting stops 4, is pulled by the yarn feeder 4 on the package 2. Compensation of variations in the tension of the thread is carried out as follows. When the yarn feeder 4 is reached from right to left (up to point a in Fig. 1), the thread is wound on the package 2, does not touch stop 3. When the thread guide reaches the point, the thread touches stop 3 in position K.

When the yarn feeder 3 moves along the transition profile of the fist-folding profile, it moves along the axis of the package 2 from position a, j to position a and back. In this area, due to a change in the yarn angle on the package 2 from oLg to 0 and from 0. to CX.0, there is a change in the rate of thread loading on the package, and as a result, there is a sharp fluctuation in the amount of thread tension. A similar repetition occurs at the right end in the area (Fig. 1).

Installing the proposed compensator does not allow the yarn to relax at the moment of movement of the yarn feeder along the transition curve, significantly reduces the fluctuation of the yarn tension during these moments of package winding, which, in turn, contributes to obtaining higher quality yarns.

Formula and Invention

A device for winding a yarn on a package containing a feeding pair, a package holder, a spreader with a yarn feeder and stops for tensioning the yarn at the reversal points of the yarn feeder, characterized in that, in order to improve the quality of the winding, the stops are placed in the triangle of the layout at a distance of one from other, determined from the following relation

5dg -B -

where B is the distance between the stops, L is the layout length, S is the distance from the feed pair 0 to one of the extreme positions of the yarn feeder, K is the distance from the pair feeds to the stop.

2. The device according to claim 1, dated by the fact that each

the emphasis is made in the form of a one-arm lever with a roller at its free end.

3. The device according to claim 1, different from the fact that each

emphasis is made in the form of a spring-loaded roller.

4. The device according to claim 1, characterized in that each stop is made in the form of a leaf spring.

Sources of information taken into account in the examination

1. USSR author's certificate 597621, cl. B 65 H 54/28, 1976.

Claims (4)

Claim A device for winding a thread onto a package containing a supply pair, a package holder, a spreader with a thread guide and stops for tensioning the threads in places of reverse thread guide, characterized in that, in order to improve the quality of the winding, the stops are placed in the layout triangle at a distance from one another, defined from the following relationship where B is the distance between the stops, L is the length of the layout, S is the distance from the feed pair to one of the extreme positions of the yarn guide, K is the distance from the supply pair to the stop. 2. The device pop. 1, characterized in that, each emphasis is made in the form of a single arm with a roller at its free end. 3. The device pop. 1, due to the fact that each emphasis is made in the form of a spring-loaded roller. 4. The device according to π. 1, characterized in that each emphasis is made in the form of a leaf spring.