JPH1017208A - Yarn winding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a yarn winding method to reduce a tension fluctuation during switching of a yarn, uniformize the physical properties of the yarn during a time between the starting of winding and ending of winding, prevent the occurrence of disturbance of a yarn layer due to smoothness of thread threading right after switching of the yarn, be excellent in rewinding of the yarn, prevent the occurrence of confounding mottling when confounding processing is applied by pressure air during running of the yarn, and prevent the generation of vibration and noise during the starting of winding. SOLUTION: When a yarn is wound by switching from a bobbin under winding to a new bobbin, a traverse speed at a point of time when, during ordinary winding, the yarn is started to be wound is regulated to a value approximately similar to a traverse speed at a point of time when, during ordinary winding, winding ends. The traverse speed is boosted at a rapid speed so that a yarn winding tension is rendered approximately similar to a tension during ordinary winding. At a point of time when the traverse speed attains a value approximately equal to given wind ratio constant winding, switching to a wind ratio constant winding system is effected.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a yarn winding method for continuously winding a fed yarn with a plurality of yarn winding spindles.

More specifically, when the fed yarn is traversed by a traverse device and wound alternately and continuously by a plurality of spindles, the traverse speed is controlled in a manner not seen in the past, and a new winding is performed. The present invention relates to a winding method for preventing troubles such as thread slippage on a take-up bobbin beforehand and controlling a value of a winding tension at the start of winding to an appropriate value.

[0003]

2. Description of the Related Art Generally, there are roughly two methods for winding a yarn fed at a constant speed.

[0004] One of them is a method of winding while keeping the traverse speed constant irrespective of the number of rotations of a spindle for winding a yarn, and is called a "constant winding of a twill angle" or a "random wind".

This method is simple and widely used, but when the traverse speed (the number of traverses) and the number of revolutions of the spindle for winding the yarn take a certain ratio, the winding yarns overlap in the same place. It is wound (called 'Onaya' or 'ribbon winding'), which prevents the yarn from being unwound smoothly in the later process when used by rewinding it,
In some cases, this may cause an adverse effect such as cutting the yarn.

Therefore, in order to avoid this adverse effect, a method has been proposed in which the traverse speed is constantly changed, as described in Japanese Patent Publication No. 45-41060, for example, to reduce the influence of the overlapping winding of the yarn. I have.

Another method is to prevent the above-mentioned "ribbon winding" from being generated, for example, in Japanese Patent Publication No. 60-33.
No. 749, "constant winding ratio winding" in which the value of the spindle rotation speed with respect to the traverse frequency is always kept constant.

[0008] This is because the number of traverses is also gradually reduced as the spindle rotation speed is gradually reduced as the winding diameter increases, and the traverse speed is excellent although the rewinding property of the yarn from the wound package is excellent. Control is not so common as 'constant winding of twill angle'.

However, recently, when the higher processing speed becomes higher, a good yarn rewinding property is required, so that this winding method has been used. .

As a partial modification of the latter, "wind ratio constant winding", for example, a system in which the value of "wind ratio" is switched during winding as described in Japanese Patent Publication No. 57-33264 has been proposed and put into practical use. Has been

[0011] The latter "winding constant winding ratio" has the above-mentioned excellent surface, but also has disadvantages.

That is, as described in Japanese Patent Publication No. 60-33749, when the yarn is switched from a spindle being wound to a new spindle, the number of traverses at the start of winding becomes a high value, and as a result, the bobbin The yarn's twill angle becomes large, and yarn slippage and other obstacles tend to occur, and the winding start traverse speed immediately after yarn switching is high.
It is difficult to control the yarn tension in the innermost layer of the bobbin, and in many cases, the yarn is wound with a high tension, so that the problem of single yarn breakage is likely to occur, and the shrinkage characteristics of the yarn change only in the high tension part. However, there is a problem that it may cause a defect of a high-order processed product.

[0013] Since the yarn is not traversed by the traverse device at the moment when the yarn is switched to the new spindle, the yarn sent out from the roller is wound without loosening the tension only by the surface speed component of the spindle. Because it must be done.

Next, the yarn starts to be traversed by the traverse device. From this moment on, a tension-up component due to the traverse speed component is added, so that the wound yarn tension becomes a very high value. However, it is impossible to instantaneously control the value to a normal value, and as shown in FIG. 8, an abnormal tension state occurs for several tens of seconds to about one minute.

At the beginning of winding, since the twill angle is large, yarn slippage is likely to occur, and when yarn slippage occurs, the wound yarn layer is disturbed and wound, making it impossible to rewind.

Further, in the process of continuously producing yarn, entanglement processing by pressurized air is performed while the yarn is running. However, when the yarn tension is high, this entanglement processing does not function well, and Cannot be applied to the yarn.

Further, in a portion close to the bobbin diameter at the beginning of winding, when the winding is performed at a constant winding ratio, the package surface is wound in a polygonal tendency, so that the vibration tends to be large and the noise tends to be large.

[0018]

In the conventional winding with a constant winding ratio, the yarn tension in the innermost layer of the new bobbin immediately after the yarn switching is increased, causing a single yarn breakage or the yarn in the innermost layer. There is a problem that a difference is caused between the physical properties of the yarn and the physical properties of the yarn wound thereafter.

Further, since the yarn tension becomes high immediately after the yarn switching, the entanglement processing does not work well when the entanglement processing by the compressed air is performed during the running of the yarn, and a predetermined number of entanglements is applied to the yarn. There is a problem that the yarn layer slips easily due to a large twill angle, so that the yarn layer is wound in a disturbed state, and it is impossible to rewind.

Further, in a portion close to the bobbin diameter at the beginning of winding, if the winding is performed at a constant wind ratio, the package surface is wound with a polygonal tendency, so that there is a problem that vibration is large and noise is increased.

According to the present invention, the change in tension at the time of yarn switching is small, the physical properties of the yarn from the start to the end of winding are uniform, and the yarn rewinding without yarn layer disturbance due to yarn slippage immediately after the yarn switching is performed. Good winding, no entanglement when performing entanglement processing by compressed air during running of the yarn, and can wind the yarn at the beginning of winding at a value that is not so different from the steady state. It is an object to provide a method.

[0022]

In order to solve the above-mentioned problems, a yarn winding method according to the present invention switches a bobbin from a winding bobbin to a new bobbin as described in claim 1. When taking up, the traverse speed at the start of winding of the yarn is set to a speed close to the traverse speed at the end of winding at the time of normal winding, and then the traverse speed is set to the tension at the time of winding the yarn at the time of normal winding. The traverse speed is increased at a rapid speed while maintaining a state substantially unchanged from the above, and when the traverse speed reaches the vicinity of the wind ratio value of the predetermined winding ratio constant winding, the winding mode is switched to the constant winding ratio winding system.

The yarn winding method of the present invention is described in claim 2.
The value of the winding ratio of a constant winding ratio during winding of the yarn is sequentially switched to a smaller value as described in (1) or during the winding of the yarn as described in (3). When switching from a new bobbin to a new bobbin and winding continuously, the rotation speed of the spindle during winding is set to be higher than the previous rotation speed in order to guarantee the traverse speed component removed at the time of yarn switching. You can do so.

[0024]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a schematic view showing an embodiment of the construction of a winding machine for carrying out a yarn winding method according to the present invention. (Not shown), a revolving drum 2 rotatably mounted on the revolving drum 2, spindles 3, 4 rotatably mounted on the revolving drum 2, and a machine frame at a position above the spindles 3, 4. The traverse device 6 includes a traverse device 6 attached to a frame 5 that moves up and down in a vertical direction along a guide rod 1 a formed in the traverse device 1, and a touch roller 7 rotatably mounted on the traverse device 6.

The revolving drum 2 has a motor 9 for rotating by 180 °, the spindles 3 and 4 each have a driving motor (not shown), and the traverse device 6 has a traverse guide driving motor (not shown). (Not shown), and the rotation speed of the spindle, the speed of the traverse, the switching of the yarn, and the like are controlled in accordance with a program preset by the controller 8.

In the above-mentioned winding machine, when the yarn 30 is wound on the bobbin 20 tightened to the spindle 3 and a predetermined amount of the package 40 is obtained, the standby spindle 4
After rotating to a predetermined speed, the revolving drum 2 is rotated to move to the yarn switching position, and the yarn 30 is switched from the full bobbin to the empty bobbin and wound.

In general, when the yarn 30 sent out at a constant speed is wound around the bobbin 20 mounted on the spindle 3, the speed of the yarn 30 sent out from a feeding roller (not shown) ( Vy), the surface speed (Vb) of the bobbin 20 mounted on the spindle 3 for winding the yarn 30, and the traverse speed (Vt) of the traverse device 6 for traversing the yarn when winding the yarn. When (Vy), (Vb), and (Vt) are expressed as vectors in the equation, Vy = Vb + Vt, and the relationship is expressed as a vector diagram as shown in FIG.

In this state, when the yarn is wound up by a preset amount, the yarn is continuously switched to a new bobbin 20 mounted on the spindle 4 in a standby state.

At this time, the surface speed of the bobbin 20 mounted on the spindle 4 to which the yarn 30 is switched must be at least Vy = Vb because it is necessary to take up the yarn sent out without any traverse component. (Strictly speaking, the yarn shrinks in many cases before being sent out from a feed-out roller (not shown) and wound up by a winder, so that Vy is not Vy = Vb.
Here, the contraction component will be excluded for easy understanding. ).

In this state, when the revolving drum 2 rotates and the spindle 4 at the standby position moves to the yarn switching position, the yarn being wound is moved out of the traverse range by the yarn moving mechanism (not shown). The yarn is moved, and then the yarn 30 is gripped by the yarn gripping portion of a new bobbin by a yarn switching mechanism (not shown), and the yarn is switched.

FIG. 3 is a vector diagram showing the relationship between the surface speed (Vb) of the bobbin 20 and the speed (Vy) of the yarn 30 at this time.

Next, when the yarn 30 is traversed by the traverse device 6 and wound in a normal state, the bobbin 2
FIG. 4 shows the relationship between the surface speed (Vb) of 0 and the speed (Vy) of the yarn 30 as a vector.

At this time, the traverse speed (Vt) is changed to the surface speed (Vb) of the bobbin 20 mounted on the spindle 4.
The yarn 3 which is taken into the bobbin 20 because the components are added.
Vy ′ = Vb (= Vy) + Vt
It can be seen that Vy '> Vy.

That is, the yarn 30 that the bobbin 20 is taking up more than the speed (Vy) of the yarn 30 that is sent out.
The speed (Vy ′) is larger than the speed (Vy ′), and the yarn 30 is pulled. This state is shown in FIG.

It is understood from FIG. 5 that the tension of the yarn 30 becomes larger than usual.

If the tension increase is large, even if the yarn speed controller attempts to control the yarn tension to a predetermined value, it cannot be corrected instantaneously, and the innermost yarn is wound with a large tension. , Resulting in an obstacle such that the physical properties of the yarn change or a part of the filament breaks.
It can also be seen that this up amount depends on the magnitude of the traverse speed.

The above relationship will be described with specific numbers.

The yarn feeding speed (Vy) is 4000 m
/ Min, the wind ratio is 10.2862, the diameter of the bobbin is 110 mm, and the width of the traverse is 300 mm. Vt) is Vt = 673 m / min.

Under these conditions, when the yarn is switched and the post-traverse speed is taken into account, the speed (Vy ') of the yarn picked up by the spindle is Vy' = 4058 m / min, and the yarn sent out is 58 m / min. However, the tension is excessively increased, and the tension is increased more than the predetermined tension.

When the wound yarn at this time is a polyester filament, the yarn tension immediately after the switching may exceed 500 g even if the normal winding tension is 200 g.

If the tension is reduced while maintaining the wind ratio in order to avoid this increase in tension, the yarn switching may fail, or yarn slippage may occur at the beginning of winding, making it impossible to continue winding. I do.

The present invention has been devised as a means for solving these various problems. First, the condition at the time of yarn switching needs to be a condition that does not cause a yarn switching failure, and therefore cannot be largely changed. .

Further, it can be understood from FIG. 5 that the traverse speed at the start of winding should be reduced in order to reduce the increase in tension at the start of traverse.

In FIG. 5, Vya 'is a vector when the traverse speed at the start of winding is high, Vyb' is a speed taken by the bobbin when the traverse speed at the start of winding is low, and Pa is Pb is the amount of yarn pulling when the traverse speed is Vya ', and Pb is the amount of yarn pulling when the traverse speed is Vyb'.

If the traverse speed is kept low, that is, if the traverse angle is kept small, the package is likely to collapse. Therefore, a traverse angle of an appropriate size (at least about 6 to 8 degrees) is desirable.

Therefore, it is necessary to sequentially increase the traverse speed.

It is desirable to increase the rising speed within a range where the tension can be controlled by the controller. In this embodiment, about 30 to 60 seconds is appropriate.

Even while the traverse speed is being gradually increased, the controller instantaneously and instantaneously calculates the wind ratio at that time,
If the value is larger than the predetermined wind ratio, the traverse speed is increased as it is.

If the calculated value is within the predetermined value, the traverse number is set to a predetermined wind ratio in accordance with the spindle speed at that time, and the control is switched to the constant wind ratio winding control.

FIG. 6 shows a change state of the traverse speed from the time when the yarn is switched to the time when the yarn winding is completed in this winding method.

Under the above conditions, the yarn fed at a predetermined speed is wound on a bobbin at a winding position, and the revolving drum 2 is rotated to set the spindle 3 at the winding position to the standby position and the spindle at the standby position. 4 is moved to the winding position, and the yarn is switched from the full bobbin to the empty bobbin.
Subsequently, the yarn was wound up, and the yarn tension during this time was measured. The state was as shown in FIG.

In FIG. 7, it can be seen that the yarn tension does not fluctuate greatly at the time of yarn switching, and is greatly improved as compared with the fluctuation in tension in the conventional winding method (FIG. 8).

[0053]

According to the first aspect of the present invention, when the yarn is switched from a bobbin being wound to a new bobbin and wound up as described in claim 1, the yarn winding time at the start of winding the yarn is reduced. Set the traverse speed to a speed close to the traverse speed at the end of winding during normal winding, and then change the traverse speed to a rapid speed while keeping the yarn winding tension not so much different from the tension during normal winding. At the time when the traverse speed reaches the vicinity of the wind ratio value of the predetermined winding ratio constant winding, the system is switched to the constant winding ratio winding system, so that the following effects can be obtained. . 1. An increase in the yarn tension at the time of yarn switching is suppressed, and a yarn breakage, a change in physical properties of the yarn, and a yarn slippage during winding that have occurred as a result of the conventional phenomenon of yarn tension increase. It is possible to solve various problems, such as interruption of winding, deterioration in quality of high-order processed products due to draw-out failure of the yarn in the high-order processing stage, and reduction in productivity. 2. At the beginning of winding, since the yarn is wound on the bobbin in an irregular state, the yarn does not become slightly polygonal, and vibration and noise during contact rotation between the touch roller and the bobbin can be suppressed. 3. Since the winding angle at the beginning of winding can be reduced, the number of times of occurrence of the yarn slipping phenomenon on the bobbin, which has conventionally occurred, can be drastically reduced. Various obstacles in the processing steps can be eliminated. 4. Mutual yarn in the field where the yarn at the beginning of the package and the yarn at the end of the package are connected and used continuously during high-order processing in order to eliminate the change in the yarn quality of the innermost layer at the beginning of the package There is no quality difference, and it is possible to improve the quality of the product. 5. When performing the confounding process, a desired number of confounds can be applied to the running yarn.

Further, if the value of the winding ratio of a constant winding ratio is sequentially switched to a smaller value during winding of the yarn as described in claim 2, the winding diameter of the package is limited. And a large-diameter package can be obtained.

Further, when the yarn is switched from a bobbin being wound to a new bobbin and wound continuously as described in claim 3, the traverse speed component removed at the time of yarn switching is guaranteed. If the rotation speed of the spindle during winding is set higher than the rotation speed up to that time, switching failure at the time of yarn switching can be reliably reduced.

[Brief description of the drawings]

FIG. 1 is a schematic view showing one embodiment of a configuration of a winding machine for performing a yarn winding method of the present invention.

FIG. 2 is a vector diagram showing a relationship between a speed of a fed yarn, a traverse speed, and a surface speed of a bobbin for winding the yarn when performing a normal yarn winding.

FIG. 3 is a vector diagram showing a relationship between a yarn speed and a bobbin surface speed when the yarn is switched to a new bobbin waiting when a set amount of yarn is wound.

FIG. 4 is a vector diagram showing a relationship between a bobbin surface speed and a traverse speed when a yarn is switched to a new bobbin to start winding, and a speed of a yarn wound according to both conditions; .

FIG. 5 is a vector diagram showing the relationship between the amount of increase in the winding tension of the yarn due to the difference in the winding speed of the yarn depending on the value of the traverse speed at the start of winding.

FIG. 6 is a basic diagram showing a relationship between a traverse speed and a winding time in the yarn winding method of the present invention.

FIG. 7 is a diagram showing a change in yarn tension during yarn switching and yarn winding by the yarn winding method of the present invention.

FIG. 8 is a diagram showing a change in yarn tension during yarn switching and yarn winding by a conventional yarn winding method.

[Description of sign]

 DESCRIPTION OF SYMBOLS 1 Machine frame 2 Revolving drum 3, 4 Spindle 5 Frame 6 Trabus device 7 Touch roller 8 Controller 9 Motor

Continued on the front page (72) Inventor Ken Arita 1-1-1 Sonoyama, Otsu-shi, Shiga Torayen Engineering Co., Ltd. (72) Inventor Hisao Hasegawa 1-1-1 Sonoyama, Otsu-shi, Shiga Torayen Jinya Inside Ring Co., Ltd. (72) Inventor Yoshihiro Sakaguchi 1-1-1 Sonoyama, Otsu City, Shiga Prefecture Toray Engineering Co., Ltd.

Claims (3)

[Claims] 1. An automatic winding device in which a yarn sent out at a constant speed is alternately wound around bobbins mounted on two spindles each provided with a driving motor, while being traversed by a traverse device. A winding machine for winding a yarn for a predetermined time by a winding ratio constant winding system in which a value of a spindle speed during one reciprocation of a traverse is constant. When the reel is switched from the bobbin being wound to a new bobbin, the traverse speed at the start of winding of the yarn is set to a speed close to the traverse speed at the end of winding in the normal winding, and then the traverse speed is changed. The traverse speed is increased to a predetermined value while maintaining a state in which the yarn winding tension is not significantly different from the tension during normal winding. A winding method wherein the winding ratio is switched to a constant winding ratio when the winding ratio reaches the vicinity of a winding ratio value of constant winding ratio. 2. The yarn winding method according to claim 1, wherein the value of the winding ratio of the winding having a constant winding ratio during winding of the yarn is sequentially switched to a smaller value. 3. When a yarn is switched from a bobbin being wound to a new bobbin and is continuously wound, rotation of a spindle during winding is ensured in order to guarantee a traverse speed component that is removed at the time of yarn switching. 3. The yarn winding method according to claim 1, wherein the number is set to be higher than the number of rotations up to that time.