JP2004250849A - Method for producing monofilament false-twisted yarn and apparatus for producing the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To develop a false twister equipped with a device for simply false-twisting monofilaments by bundling two or more filaments and to provide a method and an apparatus for producing a monofilament false-twisted yarn which is simply opened into the false-twisted two or more monofilaments. <P>SOLUTION: The monofilament false-twisted yarn is produced by unwinding a multifilament yarn from a yarn feed package wound with the multifilament yarn, carrying out a false-twist processing by unwinding the yarn in a twistless state to form a false-twist package, subsequently unwinding the false-twisted yarn of the multifilament state wound around the false-twist package separately to form the monofilament false-twisted yarn. The apparatus for producing the monofilament false-twisted yarn is constituted of the false twister equipped with an unwinding device for unwinding the yarn in the twistless state and forming the false-twist package by releasing the multifilament yarn from the unwinding device and a yarn dividing device for forming two or more monofilament false twisted yarns by unwinding the false twist package. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a method for producing a monofilament false twisted yarn and an apparatus for producing a monofilament false twisted yarn provided with a false twisting machine for performing false twisting of a yarn.
[0002]
[Prior art]
The false twisting machine is for performing false twisting on a melt-spun synthetic fiber yarn, unwinding the yarn from a yarn supply package, sending the yarn with a first feed roller, a primary heater, a cooling plate, While being stretched in the process from the second feed roller to the secondary heater via the nip twister, false twisting and heat fixing are performed and sublimation processing is performed to process the stretched false twisted yarn.
[0003]
As a yarn supply package used for a false twisting machine, a large-diameter package in which one yarn composed of a large number of filaments is usually wound is supplied. Further, in order to unwind the yarn from the yarn supplying package, a method is employed in which the yarn is taken out above the yarn supplying package and unwound (hereinafter, referred to as overhead collecting).
[0004]
Therefore, when unwinding the yarn from the yarn supply package, once the yarn is unwound one turn along the outer periphery of the package, the yarn is twisted once. Usually, this number of twists is not a problem and does not adversely affect the quality of the false twisted yarn.
[0005]
By the way, there are filaments of various thicknesses in the filaments constituting the yarn, and many filaments are formed by bundling a large number of filaments of about 1 to 30 denier into one multifilament yarn. There is also a yarn called a monofilament in which one thick filament having a thickness of tens to hundreds of deniers constitutes one yarn.
[0006]
Usually, in the conventional false twisting machine, the overhead is taken from a large-diameter yarn supply package, the yarn is drawn out at a high speed, and the false twisting is performed, and a multifilament yarn is generally used.
[0007]
Further, in a conventional apparatus for producing a false-twisted monofilament, a yarn feeding package is placed on a depolarizing drive roller instead of an active driving unwinding device as in the present invention, and the yarn wound around the package is mounted on the winding. Since the paper supply package is released while rotating with the tension for pulling out the strip, the unwinding tension increases. (For example, see Patent Document 1)
[0008]
If unwinding is performed in a state where the yarn tension is high, when the yarn is pulled out from the package end surface, the yarn falls from the package end surface (tear drop state), and the yarn breaks without being able to be unwound thereafter. There is.
[0009]
Further, when false twisting is performed in a state where the yarn tension is high, when POY, which is an undrawn yarn, is supplied, the unwinding tension is too high, and the elongation unevenness increases, and the quality of the false twisted yarn is reduced. In some cases, it is not stable and a uniform false twisted yarn cannot be obtained.
[0010]
Furthermore, if a monofilament single yarn supply package is supplied to a false twisting machine to produce a monofilament false twist yarn, a false twisting device or a winding device is required for each monofilament yarn. There is a problem that a large number of devices are required, which is uneconomical.
[0011]
[Patent Document 1]
JP-A-10-251926 (pages 1-4)
[0012]
[Problems to be solved by the invention]
In order to solve the above-mentioned problems, the present invention has been applied to a false twisting machine equipped with a device capable of easily performing a false twisting process by bundling a plurality of monofilament yarns. An object of the present invention is to provide a method and an apparatus for producing a monofilament false twisted yarn capable of easily separating a plurality of yarns.
[0013]
[Means for Solving the Problems]
In order to solve the above-mentioned problem, in the invention according to claim 1, a false twist is performed while unwinding the yarn in a non-twist state from a yarn supply package in which a multifilament yarn is wound. After forming the twisted package, the multifilament false twisted yarn wound around the false twisted package is unwound while being separated to produce a monofilament false twisted yarn.
[0014]
For this purpose, a large number of monofilament false twisted yarns can be simultaneously produced simply by simultaneously performing false twisting on a large number of monofilament yarns and then unwinding the resulting false twisted package while separating the fibers.
[0015]
In the invention according to claim 2, there is provided an unwinding device for unwinding the yarn in a non-twist state from a yarn supply package in which a multifilament yarn is wound, and the multifilament yarn is unwound by the unwinding device. This is a device for manufacturing a monofilament false twisted yarn comprising a false twisting machine for forming a false twisted package while performing false twisting while sending out a false twisted package, and a separating machine for unwinding the false twisted package to form a plurality of monofilament false twisted yarns. It is characterized by the following.
[0016]
For this reason, a monofilament false-twisted yarn can be easily formed by bundling a large number of monofilament yarns into a multifilament yarn and feeding it to a false twisting machine. Can be manufactured.
[0017]
In the invention according to claim 3, the unwinding device is a single-mass drive type unwinding device that sends out the yarn while rotating the yarn supply package, and detects the tension of the unwound yarn. The rotation speed of the yarn supply package is controlled by the output of the tension sensor.
[0018]
Therefore, the yarn to be drawn from the yarn supply package can be drawn out in a non-twisted state, and the unwinding tension can be freely controlled.As a result, yarn setting becomes easy, and yarn breakage during processing is reduced. Become. In addition, since the yarn tension during the false twisting can be controlled, the bulkiness of the false twisting yarn can be freely controlled. Furthermore, when starting false twisting, the yarn supply can be slow-started, and when the so-called rolling to unwind the yarn while rotating the yarn supply package, the yarn is excessively slackened or pulled. It is possible to prevent the over-twisting, and it is possible to stably perform the false twisting for each weight.
[0019]
In the invention according to claim 4, the unwinding device is a single-weight drive type unwinding device that sends out the yarn while rotating the yarn supply package, and a slack that suctions the unwound yarn. It is characterized by having a tube.
[0020]
Therefore, the yarn supply package is stably held, and the slack tube sucks and holds the unwound yarn, so that the yarn serves as a so-called buffer for temporarily storing the yarn and is released. The yarn can be stably pulled out even if the yarn tension of the yarn to be changed fluctuates.
[0021]
In the invention described in claim 5, the unwinding device includes two rollers for placing the yarn supply package in a horizontal state, and one of the two rollers rotates the yarn supply package. And the other roller is a driven roller.
[0022]
For this reason, the unwinding device that stably holds the yarn supply package and that can be driven to rotate reliably is configured, so that the yarn can be stably pulled out while rotating the yarn supply package.
[0023]
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below in detail with reference to FIGS. FIG. 1 is a schematic explanatory view of an unwinding device according to the present invention, in which (a) is an unwinding device provided with a tension sensor, and (b) is an unwinding device provided with a slack tube. 2A and 2B are block diagrams showing a procedure for threading a false twisting machine according to the present invention. FIG. 2A shows a case where an unwinding device having a tension sensor is used, and FIG. 2B shows a case where a slack tube is provided. This is a case where an unwinding device is used. FIG. 3 is a schematic explanatory view of the fiber separator according to the present invention. FIG. 4 is a schematic overall view of a false twisting machine according to the present invention.
[0024]
The false twister according to the present invention will be described with reference to FIG. Reference numeral 11 denotes a creel stand, and the yarn Y drawn from the yarn supply package P supported by the creel stand 11 is introduced into the first feed roller F1. Thereafter, the yarn Y is inserted into the first heater device H1 for false twisting. The yarn Y that has exited the first heater device H1 enters the cooling plate 12, is twisted by the false twisting member 13, and then is introduced into the second feed roller F2 via an appropriate guide 14. The yarn Y coming out of the second feed roller F2 passes through a second heater device H2 for heat fixation, a third feed roller F3, an oiling roller and guides 15 and 16 (not shown), which will be described later, and is fed to a winding package PW. It is wound up.
[0025]
The first heater device H1 for false twisting and the second heater device H2 for heat fixing are heater devices H for heating the yarn Y, respectively, and include a contact heater and a non-contact heater described above. Either will be adopted.
[0026]
With reference to FIG. 2, a procedure for threading the false twisting machine will be described. First, when the unwinding device having the tension sensor shown in FIG. 2A is used, the yarn is sucked by the suction device to drive the unwinding device. Next, the unwinding speed is increased, and when the speed reaches 98% to 99% of the rotation speed of the second feed roller F2, the yarn is hooked on the second feed roller F2, and the tension sensor is turned ON. Control to the desired unwinding tension. Thereafter, the yarn is guided through a heater, a cooling plate, and an oiling roller to a winding section to start winding.
[0027]
When a slack tube is used, the unwinding speed of the yarn is increased after the yarn is sucked by the suction device in the same manner as described above, as shown in FIG. When the unwinding speed reaches substantially the same speed as the rotation speed of the second feed roller, the yarn is threaded on the second feed roller. Thereafter, the slack tube is configured to suck the yarn.
[0028]
In the case of using a slack tube, the yarn is fed while the yarn is sucked and held for a certain length in the slack tube. It can be absorbed by fluctuations in the yarn length. For this purpose, a sensor S2 (see FIG. 1) for detecting the yarn in the slack tube is provided, and the unwinding device is driven such that the sensor S2 always detects the yarn. . With this configuration, it is possible to unwind the yarn while always keeping the yarn tension within a certain range. For this reason, it is not necessary to adjust the unwinding speed according to the fluctuation of the yarn tension, and the control is simplified, which is preferable.
[0029]
The unwinding device will be described in detail with reference to FIG. The unwinding apparatus 1A shown in FIG. 1A rotates the drive roller 2 in the direction of the arrow in the drawing while the yarn supply package P is placed on the drive roller 2 and the driven roller 3, and the yarn is fed. It is configured to extract Y.
[0030]
The drawn yarn Y traverses so as to slide on the surface guide 4, passes through the hole guide 5, and is hooked on the apparatus main body via the tension sensor S <b> 1. The surface guide 4 has a guide surface curved in a convex shape, and determines the difference between the position where the yarn Y pulled out while being unwound from the yarn supply package P is pulled out at the end or the center of the package. It is shaped to absorb. That is, the curved surface guide absorbs the difference in the length of the yarn path between the case where the yarn guide is pulled out from the end of the yarn supply package and the case where the yarn guide is pulled out from the center.
[0031]
The drive roller 2 is driven to rotate by a drive motor 2A, and the drive motor 2A is configured to change its rotation speed by a control device 2B. The drive motor 2A is controlled via the control device 2B based on the yarn tension detected by the tension sensor S1, but when the yarn tension becomes higher than a set value, the rotation speed of the drive motor 2A is increased to solve the yarn Y. Increase the speed. When the yarn tension becomes lower than the set value, the rotation speed of the drive motor 2A is reduced to reduce the unwinding speed of the yarn Y.
[0032]
By setting as described above, the unwinding speed is increased immediately when the yarn tension becomes high, and the yarn Y is sent out quickly, so that the yarn tension decreases. That is, since the unwinding speed of the yarn Y is controlled so as to reduce the fluctuation of the yarn tension, even if the yarn Y is an elastic yarn having a high elongation, the yarn elongation is not greatly changed. It can be unwound and sent out stably.
[0033]
In the unwinding device 1B provided with a slack tube shown in FIG. 1B, the driving roller 2 is moved in the direction of the arrow in the drawing while the yarn supply package P is placed on the driving roller 2 and the driven roller 3. Rotating and pulling out the yarn Y is the same, but after traversing to slide on the surface guide 4 and inserting the hole guide 5, the tension sensor is not attached and the slack tube 6 is pulled out. It is arranged.
[0034]
The slack tube 6 is connected to a vacuum source (not shown) via a pipe 7 and is a member for sucking the yarn Y. The yarn S in the slack tube is detected by a sensor S2 disposed at a predetermined position. Is detectable.
[0035]
With this configuration, when the sensor S2 no longer detects the yarn Y, the rotational speed of the drive motor 2A may be increased to feed out the yarn Y to be unwound quickly. When the sensor S2 detects the yarn Y, it is not necessary to further increase the speed, and it is only necessary to maintain a constant speed. At this time, the sensor S3 may be provided at the back of the slack tube 6 to limit the maximum suction amount of the yarn Y.
[0036]
In the case of the unwinding device including the slack tube described above, the control of only holding the yarn Y between the sensors S2 and S3 can suppress the fluctuation of the yarn tension of the yarn Y. A normal induction motor is adopted as the motor, and can be controlled by a simple device.
[0037]
The separating machine will be described with reference to FIG. The separating machine is configured to positively rotate the winding package PW by the drive motor M to unwind the yarn Y1, and a plurality of monofilaments are simultaneously wound to unwind the multifilament yarn Y1. This is a device for separating fibers into monofilaments Ya, Yb, Yc, Yd,.
[0038]
The yarn Y1 pulled out from the winding package PW is divided into monofilaments after passing through the guides G1 and G2, and formed into monofilament bobbins Ba, Bb, Bc, Bd,. It is configured to be wound up.
[0039]
The guides G1 and G2 are elastically supported, and are configured to move up and down in response to a change in the yarn tension of the yarn Y1, and absorb the change.
[0040]
As described above, a multifilament yarn formed by bundling a large number of monofilament yarns is subjected to false twist processing integrally by a false twisting machine, and then divided into individual single filaments. A twisted yarn can be obtained.
[0041]
As an example, a description will be given of an example in which false-twist processing is performed as a bundle of 240 denier multifilaments by bundling 12 monofilament yarns of 20 denier. The monofilament yarn is, for example, polyester, and POY, which is an undrawn yarn, is fed to a false twisting machine, and is unwound in an untwisted state using an unwinding apparatus 1B equipped with a slack tube. False twisting was performed at 500 m / min.
[0042]
Thereafter, the obtained false twisted package is split into 12 monofilament false twisted yarns in a separating fiber and wound into a bobbin shape to obtain 12 monofilament bobbins. When this polyester monofilament false twist yarn is used, for example, for curtain fabric, it is not a glossy reflection unique to synthetic yarn but a false twisted synthetic yarn, so it has a deep spun yarn tone, calm color and gloss And a curtain material full of luxury can be obtained.
[0043]
Further, if a monofilament false twist yarn having high rigidity is used, it is possible to provide a curtain fabric in which the shape is not easily collapsed. In addition, if a woven fabric structure is used for the warp and the weft, respectively, by combining a yarn having a low rigidity and a yarn having a high rigidity, a curtain fabric which is easily bent in one direction and hardly bent in the opposite direction can be obtained.
[0044]
In addition, by performing false twisting using a polyurethane monofilament yarn, a monofilament false twisted yarn having high stretchability and high bulkiness can be obtained, and a highly stretchable woven or knitted fabric can also be manufactured. .
[0045]
【The invention's effect】
As described above, according to the present invention, a multifilament yarn formed by bundling a large number of monofilament yarns is subjected to false twisting by a false twisting machine, and then each is separated to obtain a large number of monofilament yarns. Monofilament false twist yarn can be easily manufactured.
[Brief description of the drawings]
FIG. 1 is a schematic explanatory view of an unwinding device according to the present invention, in which (a) is an unwinding device provided with a tension sensor, and (b) is an unwinding device provided with a slack tube.
FIGS. 2A and 2B are block diagrams showing a procedure for threading a false twisting machine according to the present invention, wherein FIG. 2A shows a case where an unwinding device equipped with a tension sensor is used, and FIG. In this case, the unwinding device is used.
FIG. 3 is a schematic explanatory view of a fiber separating machine according to the present invention.
FIG. 4 is a schematic overall view of a false twisting machine employing the heater device according to the present invention.
[Explanation of symbols]
1A unwinding device (with yarn tension sensor)
1B unwinding device (with slack tube)
2 Drive roller 2A Drive motor 3 Follower roller 4 Surface guide 5 Hole guide 6 Slack tube H Heater Y Yarn P Yarn supply package PW Winding package (false twist package)
S1 tension sensor S2 sensor

Claims (5)

From the yarn supply package in which the multifilament yarn is wound, false twisting is performed while unwinding the yarn in a non-twisted state, and a false twist package is formed. A method for producing a monofilament false twist yarn, comprising unwinding a filament false twist yarn while separating the filament to produce a monofilament false twist yarn. From the yarn supply package in which the multifilament yarn is wound, an unwinding device for unwinding the yarn in a non-twisted state is provided. An apparatus for producing a monofilament false twist yarn, comprising: a false twisting machine for forming a package; and a fiber separating machine for unwinding the false twist package to form a plurality of monofilament false twisted yarns. The unwinding device is a single spindle drive type unwinding device that sends out the yarn while rotating the yarn supply package, and further includes a tension sensor that detects a tension of the unwound yarn, and an output of the sensor. The apparatus for producing a monofilament false-twisted yarn according to claim 2, wherein the rotational speed of the yarn supply package is controlled by the following. The unwinding device is a single spindle drive type unwinding device that sends out the yarn while rotating the yarn supply package, and further includes a slack tube that suctions the unwound yarn. An apparatus for producing a monofilament false twist yarn according to claim 2. The unwinding device includes two rollers that place the yarn supply package in a horizontal state, one of the two rollers is a drive roller that rotates the yarn supply package, and the other roller is The apparatus for producing a monofilament false twist yarn according to any one of claims 1 to 4, wherein the apparatus is a driven roller.

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