JPS5930809B2 - Yarn winding method in draw-twisting machine, etc. - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a yarn winding method in a draw-twisting machine, etc., and an object thereof is to prevent yarn breakage that occurs when starting the draw-twisting machine, etc.

Generally, in a draw-twisting machine, etc., when the formation of the package on the bobbin is completed, a ring is lowered to the waist spool position fitted at the bottom of the spindle after winding the package. After winding, cut the connecting thread between the package and the waist spool and hoist the package, then attach an empty bobbin, start the draw-twisting machine, etc., and place the yarn on the waist spool at the time of starting winding. Adopts continuous top ink, which restarts the so-called draw-twisting machine without threading every time it starts, such as a so-called draw-twisting machine, which winds uneven yarn and starts winding it onto the bobbin after a normal yarn begins to appear. has been done.

When implementing such a method, the most problematic problem is yarn breakage at the time of startup.

This kind of yarn breakage is often caused by the end of the yarn wound around the waist spool unraveling and becoming entangled with the crossover thread that connects to the waist spool through the ring. Although the ring is temporarily stopped within this traverse area and overlapping winding is performed, these methods do not securely secure the yarn end and lack stability in preventing yarn breakage. It was hot.

The present invention has been made to eliminate such drawbacks, and is a drawing/twisting machine in which non-uniform yarn generated when starting and stopping is wound onto a waist spool attached to the lower part of the spindle, and top ink is continuously performed. etc., when the draw-twisting machine etc. is stopped, the ring is temporarily stopped just below the upper brim of the waist spool, and overlapping winding is performed at the upper end of the waist spool, and minute traverse winding is performed on the waist spool below the overlapping winding position. This is a yarn winding method in a draw-twisting machine, etc.

Hereinafter, the present invention will be explained with reference to the drawings.

Figure 1 is a diagram of the ring traverse motion of the drawing and twisting machine at the end of yarn winding according to the present invention. When parts are formed on the bobbin inserted on the spindle and the winding is fully wound, the spindle system and drawing system are driven. The motor is switched on (point e) and the ring moves to the upper end of the bobbin, where it is temporarily stopped and stack winding (bunch winding) is performed (point b).

The overlapping winding may be performed in two or more stages, and the drive motor may be switched off at the same time as the first overlapping winding is performed. Next, after a certain period of time has elapsed, the ring descends at point c and stops just below the upper brim 2 of the waist spool 1 (point d) as shown in FIG. Overlapping winding is carried out at this position, and in this case, when descending, the crossover thread 5 that continues from the bobbin 4 to the waist spool 1 via the upper brim notch 3 is wrapped around the upper brim by the overlapping winding 6 on the waist spool 1 side. It is pressed and fixed directly under 2.

- Once the overlapping winding 6 is formed for a predetermined period of time (point e), the ring 7 moves downward again and performs a minute traverse with the waist spool 1 until the drive system almost completely stops, and the non-uniform thread being sent out during this time is Wind it up and stop.
2 After that, after cutting the jumper thread 5 and doffing the full bobbin, when inserting an empty bobbin and starting up the twisting machine, the jumper thread 5 on the waist spool side is attached to the upper part of the waist spool 1. Since it is firmly fixed by the overlapping winding 6 just below the collar 2, the thread end 2 after being cut is
The yarn does not unwind due to centrifugal force caused by rotation of the spindle, and therefore, it is almost completely prevented from wrapping around the winding yarn and breaking it. Here, the overlapping winding 6 formed just below the upper brim 2 of the waist spool 1 often unravels if the number of windings is small, so it is preferable to have around 20 windings or more in order to secure the crossover thread. , and its position is 571 from the bottom surface of the upper brim.
For the same reason, it is preferable to keep the temperature within tm.

Note that this overlapping winding 6 collapses when it becomes thick to a certain extent and fills the boundary with the minute traverse, so it is preferable to leave a certain amount of space between it and the minute traverse section 8. In the above description, the minute traverse was performed after the overlapping winding, but it goes without saying that the overlapping winding may be performed during or during the minute traverse. As explained above, the present invention temporarily stops the ring just below the upper brim of the waist spool when the draw-twisting machine etc. is stopped to perform overlapping winding, and before or after that, minute traverse winding is performed using the waist spool below the overlapping winding position. Therefore, the crossover thread connected to the bobbin and the waist spool is completely fixed on the waist spool side, and at the same time, uneven threads that occur when the machine is stopped are wound almost uniformly on the waist spool.

For this reason, the replacement cycle of the waist spool can be greatly improved, and the yarn end after cutting the crossing yarn does not fly out and unravel due to centrifugal force at the next start-up, for example, for semi-dull 150 de/30 filament yarn. Conventional case: 7%
The thread breakage rate at start-up, which had reached the same level before and after, has been reduced to about 0.5%, and the effect is extremely large.

[Brief explanation of the drawing]

FIG. 1 is a traverse motion diagram of a ring showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram for implementing the present invention. 1 is the waist spool, 2 is the upper brim, 5 is the crossover thread, 6
is a layered wrap, and 7 is a ring.

Claims (1)

[Scope of Claims] 1. In a draw-twisting machine, etc., in which non-uniform yarn generated at startup and stop is wound onto a waist spool attached to the lower part of the spindle and doffing is performed continuously, when the draw-twist machine, etc. is stopped, A method for winding yarn in a stretch-twisting machine, etc., characterized in that rings are overlapped at the upper end of the waist spool, and minute traverse winding is performed on the waist spool below the overlapped winding position. 2. A yarn winding method in a draw-twisting machine or the like according to claim 1, wherein the number of overlapping windings directly under the brim is 20 or more. 3. A yarn winding method in a draw-twisting machine or the like according to claim 1 or 2, wherein the overlapping winding position is within 5 mm from the lower surface of the upper brim.