JPS61138726A - Control of spindle revolution in ring twister - Google Patents

Abstract

PURPOSE:In the stage where the average rotation per minute reaches a steady state, the rotation is set to a high speed at the top point of the ring rail and to a lower speed at the bottom point every chase to stabilize the running atti tude of the traveller and prevent the yarn from being broken. CONSTITUTION:At the bottom point of the ring rail where the distance from the snail wire to the traveller is long, the rotation of the spindle is lowered, while at the top point where the distance is short, the rotation speed of the spindle is kept high. Thus, the rotation of the traveller becomes almost constant, resulting in stabilization of its running attitude and prevention of yarn breakage caused by knocking of the traveller.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a spindle rotation control method in a ring heating device having a heating mechanism using a ring and a traveler.

BACKGROUND OF THE INVENTION Rotation of a spindle of a ring heating device such as a spinning machine is controlled by various methods for the purpose of preventing yarn breakage or correcting the shape of a wound ball. Typical methods include: (1) In order to adjust the tension at the beginning of winding, the initial rotation speed is lowered, the rotation speed is gradually increased linearly, and the rotation speed becomes steady from a certain position (base shifting) , (2) The speed changes as in (1), but the speed is also changed at the rising point and descending point of the ring rail for each race, with low speed at the rising point of the ring rail and high speed at the descending point. One that incorporates a step shifting method (chase shifting), similar to +302), but one that does not incorporate a step shifting method in the initial stage of linearly increasing the rotation speed (combination shifting)
, similar to (4H2), but the speed is low at the beginning of winding at the descending point of the ring rail.These methods all focus on keeping the tension of the yarn constant; The effect of correcting the shape of the rolled ball by adjusting the ballooning is remarkable, and the effect of preventing yarn breakage is slightly more noticeable than when the spindle rotates at a constant speed, but there is a strong desire to reduce the number of workers and package the product in large sizes. For this purpose, further improvements in preventing thread breakage are required.

Purpose of the Invention The present invention provides an effect of preventing thread breakage in a ring heating device.
It is an object of the present invention to provide a spindle rotation control method that can be made more reliable by stabilizing the traveling posture of a traveler.

Structure of the Invention The method of the present invention lowers the rotational speed of the spindle at the beginning of winding the tube yarn, gradually increases the rotational speed, and stabilizes the average rotational speed from a certain position, and at least maintains the average rotational speed at a steady state. At this stage, the ring rail is characterized by a high speed at the ascending point and a slow speed at the descending point for each race.

The step shift method in the method of the present invention is completely opposite to the chase shift, combination shift, and cross shift described above, but the present invention focuses on the sliding speed and attitude of the traveler as it slides and rotates on the ring. It was completed by doing so.

That is, the traveler slides and rotates on the ring by the force in the tangential direction of the ring, which is generated by the tension of the thread wound on the bobbin by the rotation of the spindle. At the long ring rail descending point, the spindle rotates at a low speed, and at the ring rail ascending point, where the distance from the snell wire to the trapella salt is short, the spindle rotates at high speed, thereby keeping the traveler's rotational speed almost constant and maintaining the running posture. It stabilizes the thread and prevents it from breaking due to the traveler's ``shiyakushi''.

For example, when the spindle rotates at a constant speed, the attitude of the traveler sliding on the ring is at an angle of 85 degrees with respect to the ring rail at the ring rail rising point.
As the ring rail descends, the angle becomes smaller and changes by 75 degrees and 10 degrees at the descending point, but when the spindle rotation is changed to high speed at the ring rail ascending point and slow speed at the descending point according to the present invention, In this case, the angle of the traveler changes only 2 degrees from 78 degrees to 76 degrees between the ring rail ascending point and descending point, and due to the change in the attitude of board 2,
)", yarn breakage can be almost completely prevented, and a better yarn breakage prevention effect than ever before can be obtained.

In the present invention, the step shift at the rising point and descending point of the ring rail for each chain may be carried out from the beginning of winding the tube depending on the winding diameter of the tip, or may be carried out after increasing the rotational speed to a certain extent. Both are possible, but the former is preferable.

Although it is slightly inferior to the conventional speed change method, since the partial pressure speed change method is combined with the step speed change method, the effect is remarkable compared to the case where the spindle is not changed. Since the effect of preventing breakage is remarkable, the method of the present invention has good workability and makes it possible to reduce the number of workers, reduce waste yarn, create large packages for products, increase production, and improve yarn quality.

As shown in (A) of the drawing, the results of operating a ring spinning machine by controlling the spindle rotation speed according to the present invention are shown in (B) to (D) of the drawing. The results were compared with the actual results. The number of broken threads per unit time for each control method was as shown in the following table.

*l) The spindle rotation control method is shown in (A) *2) of the drawing.
Rotation at 5 partial pressure (tube ratio 5 minutes) is shown.

Although this embodiment relates to a tip that moves and winds up a chase using a filling build method, the method of the present invention can be effectively applied regardless of the method of moving the chase and the shape of the tip, and can be applied to reeds, warp builds, and combination builds. The same effect as in the example was confirmed for the coppice rolled up using this method.

Effects of the Invention The method of the present invention makes the traveling speed of the traveler almost constant,
By stabilizing the running posture, it is possible to prevent thread breakage caused by the traveler's ``shiya comb''. As a result, yarn breakage in the ring heating device is significantly reduced overall, reducing the number of personnel required for the device, reducing waste yarn, and increasing the size of products in large packages (
El.

It is possible to increase production and improve yarn quality.

[Brief explanation of drawings]

Drawings (A) to (D) are graphs showing the relationship between the spindle rotation speed and the yarn ratio in the spindle rotation control method used in the example.

Claims (2)

[Claims] (1) At the beginning of winding the tube yarn, the rotational speed of the spindle is lowered, and the rotational speed is gradually increased, and the average rotational speed is stabilized from a certain point, and at least at the stage when the average rotational speed is stabilized, A spindle rotation control method in a ring heating device, characterized in that the speed is changed to high speed at the rising point of the ring rail and low speed at the descending point of the ring rail for each chase. (2) The method according to claim (1), in which the rotational speed of the spindle is changed from the start of winding the yarn so that the speed is high at the rising point of the ring rail and low at the falling point of the ring rail.