JPS6011127B2 - Double twisting method and device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a double-twisting method and apparatus, and more particularly to a double-twisting method and apparatus that eliminates twist fluctuations at the start or stop of operation.

The double-twisting method involves unraveling the twisted yarn from a plurality of bobbins arranged around the spindle, and at the same time applying two twists to the yarn per one revolution of the spindle. However, the rotation of the spindle is usually 100 pm.
Due to the high speed exceeding , the scaled twisted yarn forms a balloon around the spindle due to centrifugal force.

Since the size of this balloon varies depending on the rotational speed of the spindle, the thickness of the thread, etc., a balloon control ring, a tension adjustment device, etc. are provided to control this. However, as the spindle becomes larger, especially in devices that unravel multiple threads from multiple bobbins, combine them, and twist them, not only does the size of the balloon become larger, but also the size of the balloon becomes larger. Sometimes, the rotational speed of the spindle disk changes, and the speed of the thread being derusted cannot follow the rotational speed of the disk, and the larger the device, the greater the difference between the rotational speed of the disk and the derusting thread distance. Become.

That is, the above-mentioned difference occurs because the balloon is gradually formed when the operation starts, and the balloon is rapidly dissolved when the operation is stopped.

The number of twists in the yarn is determined by the rotational speed of the disk and the speed of the yarn being threaded, so if there is a difference between the rotational speed of the disk and the speed of the yarn, as mentioned above, a variation in the number of twists will appear. become. The length of the part where the number of twists has changed varies depending on the length of the yarn, but it usually ranges from several meters to several tens of knitters, and currently the twisted yarn threads between this length have no commercial value and are removed. The inventors of the present invention have made intensive studies to solve the drawbacks of the conventional technology, and as a result, the present inventors have developed a method for directing the threads between the spindle twisting mechanism and the thread transfer mechanism, depending on the amount of change in yarn distance. We came up with the idea of providing a thread pool for drawing out and absorbing lines, and came up with the following invention.

That is, the gist of the present invention is a method for performing double-combustion yarn,
Forming a balloon of double-twisted yarn while starting or stopping the double-twisting device while controlling the rate of twist formation in the twist-forming zone to substantially correspond to the rotational speed of the spindle at the time of starting or stopping the double-twisting device. or to eliminate the problem, and preferably,
In a method of imparting a double-thread yarn to a twisted yarn using a double-twisting device, when the device is started or stopped, the twist formation speed in the twist-forming zone is set to the speed of the spindle at the time of starting or stopping the operation. changing the path of the double-twisted yarn running between the spindle twisting mechanism and the yarn transfer mechanism while controlling substantially to correspond to the rotational speed of the yarn, and forming a balloon of the double-twisted yarn. Or adopt a method to eliminate the problem.

Further, in a double-twisting device, balloon formation or unwinding is performed while running the twisted yarn in the forming zone at a speed substantially corresponding to the rotational speed of the spindle when the device is started or stopped. This double twisting device is characterized in that a yarn path changing mechanism that enables this is provided in the middle of the yarn path between the spindle yarn combustion mechanism and the yarn transfer mechanism.

Hereinafter, the structure of the device according to the present invention and the method of the present invention using the device will be specifically explained with reference to the drawings.

FIG. 1 is a perspective view showing a double twisting device according to the present invention, which basically consists of a spindle twisting mechanism 1, a yarn path changing mechanism 17, a yarn transfer mechanism 13, and a yarn winding mechanism 18. .

The spindle twisting mechanism 1 includes a plurality of bobbins 2 (first
The device shown in the figure is a plurality of tensors 3 that adjust the tension of the yarn to be twisted from the 3 parts), a yarn doubling guide 4 that combines these yarns and guides them to the twisting zone described later, and a high-speed rotation. It consists of a disc 19, a pulley 6, and a belt 7 that rotates the pulley 1' once.
The thread passes through the disc 19, forms a large balloon 9 through the disc hole 5, and is guided along the thread guide.
FIG. 2 is a partial cross-sectional view of the spindle twisting mechanism 1, and illustrates the T-thread path, the fixed portion, and the rotating portion.

In FIG. 2, only the disk 19 connected to the pulley 6 rotated by the belt 7 and the spindle 20 of the disk rotate. The inner ring guide 8 and the like are fixed and do not rotate. Further, the outer circumference of the spindle 20 and the inner circumference of the spindle holder 22 are in sliding contact via a bearing 23.
The twisted yarn released from the thread winding bobbin 2 passes through the tensor 3, is guided by the yarn doubling guide 4, and enters the spindle 20, but as the spindle 20 rotates, the twisted yarn has a disk mechanism. One twist is applied for one rotation of 9. Furthermore, this thread exits from the disc hole 5 to form a balloon 9, and the thread is given one more twist. Therefore, the untwisted yarn is twisted twice per one revolution of the disk 19 before it reaches the yarn path guide 1Q'. Generally, the twist forming zone refers to the area from the doubling guide 4 to the yarn guide 10 in FIG. . In FIG. 1, the twisted yarn passing through the yarn path guide 10 passes through a fixed roll guide 1, and is then transferred to the next yarn transfer mechanism 13 and winding tension adjustment mechanism 2.
5. The thread passes through the traverse guide 14 and reaches a yarn winding mechanism 18 consisting of a winding roll 15 and a package 16.

The above explanation is for normal operation, but when the yarn is stopped, the yarn path does not form a balloon and the disk hole 5 and the inner ring do not form a balloon as shown by the dotted lines in Figures 1 and 2. Both the thread guide 8 and the thread path guide 10 are stretched in a straight line without any slack.
The present invention eliminates the fluctuations in the number of twists that occur during the period between starting operation from a stopped state and reaching normal operation, and from normal operation until the double twisting device completely stops after pressing the stop switch. It is something to be eliminated. A yarn path changing mechanism 17 is provided in the middle of the yarn path between the spindle twisting mechanism 1 and the yarn transfer mechanism 13 as a mechanism for eliminating variations in the number of twists of the twisted yarn. The yarn path changing mechanism 17 is, for example, a roll guide 11.
Dancing roll guide 1 provided between and 11'
2 and a dancing roll displacement speed adjusting element 24 connected to the dancing guide 12. The dancing roll displacement speed regulating element 24 adjusts said speed when the spindle 20 and the yarn transport mechanism 13 are in motion at a speed which substantially corresponds to the rotational speed of the spindle 20, in particular at the start and stop of operation of the double-twisting device. It has the function of allowing the twisted yarn to travel through the twist forming zone and forming and dissolving the balloon 9. “Speed that substantially corresponds to the rotational speed” refers to the rotational speed during the transition period when the start switch of the double-twisting device is pressed and it reaches normal operation, and the “speed that substantially corresponds to the rotation speed when the stop switch is pressed and until it comes to a complete stop. This is the speed at which the rate of change in the running speed of the twisted yarn through the twist forming zone is substantially the same as the rate of change in the running speed of the twisted yarn through the twist forming zone.
The method of the present invention during operation and stop will be explained.

First, before operation, that is, when it is completely stopped, the yarn released from the bobbin 2 passes through the yarn path shown by dotted lines in FIGS. 1 and 2 and reaches the yarn path guide IQ. . Since this yarn is not under tension due to centrifugal force, the dancing roll guide 12 is pulled up by the dancing roll displacement speed adjusting element 24 and stopped at the position shown by the dotted line. Here, when the start switch (not shown) is turned on, the rotational speed of the disk 19 gradually increases, but the yarn to be scaled is rapidly pulled out from the bobbin 2 by the centrifugal force of the balloon 9 formation. , the rotational speed of the disk 19 and the thread direction are not synchronized, that is, the thread is far out, resulting in what is called a loose twist.

The thread path is changed by the thread length required to form the balloon 9. That is, when the double twisting device starts operating, the balloon of the twisted yarn is formed while controlling the yarn traveling speed in the twist forming zone to substantially correspond to the rotational speed of the spindle 20. Specifically, it is preferable to shorten the yarn path between the yarn path guide 10 for the double-twisted yarn running between the spindle twisting mechanism 1 and the yarn transfer mechanism 13 and the yarn transfer mechanism 13. used. On the other hand, when the double twisting device is stopped, the balloon of the lacquer yarn is absorbed while controlling the yarn running speed in the twisting zone to substantially correspond to the rotational speed of the spindle 20. Specifically, a method of lengthening the yarn path between the yarn path guide 10 and the yarn transfer mechanism 13 for the dual combustion yarn running between the spindle yarn combustion mechanism 1 and the yarn transfer mechanism 13 is preferably used. It will be done. The above-mentioned "controlled in a substantially corresponding manner" has the same meaning as in the description of the above-mentioned apparatus. Further, for example, as a method of lengthening or lighting the yarn path between the yarn path guide 10 and the yarn transfer mechanism 13, the dancing roll displacement speed adjusting element 24 is used. As explained above, the double twisting method of the present invention eliminates the slight twisting at the start of operation and the strong twisting at the stop, and is particularly advantageous in large double twisting devices equipped with a plurality of bobbins. be effective.

The present invention will be specifically described below with reference to Examples.

Example Three 1300 denier polyamide multibal key yarn winding bobbins were attached to a large double twisting device with a disk diameter of 69 mm as shown in Figs. Combining and twisting was performed with the target number of twists as M.

First, in the conventional method, three yarns to be twisted controlled by a tensor 3 are twisted from a bobbin 2 through a disk hole 5 to a yarn guide 1 directly above the yarn path guide 1, and are sent directly from a roll guide 11 by a yarn transfer mechanism 13. method was used. The yarn twisted by this conventional method has a low number of twists at the start of operation, 35
~3 T/M, the number of twists at stop was high, 45-47 T/M, and the number of twists during normal operation was 41 T/M.
/M was so large that this part had to be cut as a product. Also, when the machine was stopped mid-operation and restarted, the number of twists of the machine varied (above comparative examples).
Therefore, in order to carry out the method of the present invention, a yarn path changing mechanism 17 was provided between the spindle twisting mechanism 1 and the yarn transfer mechanism 13.

This mechanism had a function in which the twist forming speed of the yarn in the twist forming zone and the rotational speed of the spindle 20 at the start and stop of operation corresponded in a 1:1 ratio. A polyamide multivalky yarn made of 1300 denier was laminated in accordance with the comparative example. As a result, in the method of the present invention, the number of twists of the twisted yarn obtained at the start and stop of operation of the double twisting device is 41.
For T/M, the former is (41-0.5)T'M,
On the other hand, in the latter case, a twisted yarn having an extremely accurate twist number of (4111.0) T'M could be obtained. BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an overall perspective view of the double twisting device of the present invention;
FIG. 2 is a partial sectional view showing the spindle twisting mechanism.

DESCRIPTION OF SYMBOLS 1... Spindle twisting mechanism, 2... Thread winding bobbin, 5... Disc hole, 8... Inner ring guide, 9... Balloon, 12... Dancing roll guide,
13... Yarn transfer mechanism, 17... Yarn path changing mechanism t 18... Yarn winding mechanism, 19...
Disc, 24... Dancing roll displacement speed adjustment element.

Fin 1 diagram Shigeru 2 figure

Claims (1)

[Scope of Claims] 1 A(a) Unwinding yarn to be twisted from a plurality of bobbins arranged around a spindle, and unwinding a plurality of yarns that have been unwound. (b) has a twist forming zone capable of imparting two twists to the doubling yarn by rotating the spindle once; A double-twisting device comprising a spindle twisting mechanism for forming a double-twisted yarn; and a yarn transfer mechanism for transferring the double-twisted yarn formed by the twisting mechanism to the winding mechanism. In the method of imparting a double twist to a twisted yarn using 1. A double-twisting method, characterized in that the balloon formation or unraveling of a double-twist yarn is achieved with substantially corresponding control. 2 A(a) Unwinding the twisted yarn from a plurality of thread bobbins arranged around the spindle and plucking the unwound plural yarns to form a plied yarn. (b) double-twisted yarn formation having a twist forming zone capable of imparting two twists to the doubled yarn by rotating the spindle once; Yarn to be twisted using a double twisting device equipped with a spindle twisting mechanism and a yarn transfer mechanism for transferring the double twist yarn formed by the twisting mechanism to the winding mechanism. In a method for imparting a double twist to a yarn, when the device is started or stopped, the twist forming speed in the twist forming zone is controlled to substantially correspond to the rotational speed of the spindle at the time of starting or stopping the operation. while changing the path of the double-twisted yarn running between the spindle twisting mechanism and the yarn transfer mechanism,
A double-twisting method characterized by forming or eliminating a balloon of double-twisted yarn. 3 A(a) Unwinding the twisted yarn from a plurality of thread bobbins arranged around the spindle, and plucking the unwound plural yarns to form a plied yarn. (b) has a twist forming zone capable of imparting two twists to the doubled yarn by rotating the spindle once; Double-twist yarn formation A double twisting device comprising: a spindle twisting mechanism for use in the invention; and a yarn transfer mechanism for transferring the double twist yarn formed by the twisting mechanism to a winding mechanism. The spindle twisting yarn is provided with a yarn path changing mechanism that allows balloon formation or unwinding while running the twisted yarn through the forming zone at a speed that substantially corresponds to the rotational speed of the spindle when starting or stopping. A double twisting device characterized in that it is provided in the middle of a yarn path between a mechanism and a yarn transfer mechanism.