JP2007284837A - Method for producing core yarn improved in yarn tenacity - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a core yarn-producing method for producing a core yarn having further improved yarn tenacity in spinning of the core yarn. <P>SOLUTION: The method for producing the core yarn in which yarn tenacity is improved comprises a core yarn spinning step for leading a fiber bundle drafted by a draft apparatus and a core yarn supplied from a core yarn-feeding apparatus to a spinning apparatus and spinning the core yarn by the spinning apparatus and a final twist step for applying final twist to the core yarn spun by the core yarn spinning step. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

The present invention relates to a core yarn manufacturing method for manufacturing a core yarn having improved yarn strength in a core yarn manufacturing method for manufacturing a core yarn using a fiber bundle drafted by a draft device and a core yarn supplied from a core yarn supply device. It is about the method.

As is well known, a core yarn spinning machine which combines a draft device with a core yarn supply device, guides the fiber bundle drafted by the draft device and the core yarn supplied from the core yarn supply device to the spinning device, and spins the core yarn. Has been provided. Conventionally, an ultra-high speed pneumatic spinning machine is applied as this core yarn spinning machine, and the core yarn spun using elastic yarn as the core yarn has low yarn strength with respect to the ring yarn, and satisfies the conditions such as the tear strength of the final product. I couldn't. Conventionally, in order to avoid this problem, an expensive raw material (for example, Pima) that is superior in fiber strength is used to improve the average yarn strength and operate. Or there was a problem that the product could not be developed as a product because the yarn strength still did not meet the requirements.

Originally, producing a core yarn using an elastic yarn as a core yarn by using an ultra-high speed pneumatic spinning machine has a large cost merit compared to a ring yarn, but it cannot be widely deployed because its strength is insufficient. Therefore, as a process improvement method for this time, after spinning, twisting was performed using a twister to achieve a significant improvement in yarn strength and to meet the requirements of the final product. In addition, as described above, for some products, raw materials that are more expensive than necessary are used. However, this enables the raw materials themselves to be switched to inexpensive raw materials, and the total process costs are reduced. I was able to. In addition, the development of products has become wider due to the improved yarn strength.

JP 2002-363834 A

Therefore, in the present invention, in spinning the core yarn, the core yarn is produced by spinning the core yarn with the draft fiber bundle and the core yarn, and then adding the upper twist to the core yarn to produce a core yarn having improved yarn strength. Is to provide a method.

In order to achieve the above-described object, the present invention specifically guides the fiber bundle drafted by the draft device and the core yarn supplied from the core yarn supply device to the spinning device, and the core yarn is produced by the spinning device. It comprises a core yarn spinning process for spinning, and a core yarn manufacturing method with improved yarn strength, characterized by comprising a core yarn spinning step for spinning and an upper twisting step for applying an upper twist to the core yarn spun by the core yarn spinning step. .

Further, in this invention, the invention according to claim 2 is the core yarn manufacturing method with improved yarn strength according to claim 1, characterized in that the core yarn is made of an elastic yarn.

Furthermore, in the present invention, the invention according to claim 3 is the method for producing a core yarn having improved yarn strength according to claim 1 or 2, wherein the spun core yarn is wound in the core yarn spinning step. And a step of forming the package by a winding device, wherein the package is set on a spinning double twister and subjected to an upper twist.

In the core yarn manufacturing method with improved yarn strength according to the present invention, the core yarn is spun by a draft fiber bundle and the core yarn, the core yarn is spun by the core yarn spinning step, and then the core yarn is twisted. It is possible to provide a core yarn with improved yarn strength by being composed by the upper twisting process, and it works extremely effectively in that the cost to reach the product can be suppressed in the total process. It can be said.

Hereinafter, a method for manufacturing a core yarn with improved yarn strength according to the present invention will be described in detail based on specific embodiments shown in the drawings. FIG. 1 is a schematic overall front view showing an example of a core yarn spinning machine to which the present invention is applied, and FIG. 2 is a schematic side view showing a partial cross section of the core yarn spinning machine in FIG.

First, the core yarn spinning machine 1 to which the present invention is applied will be described. As shown in FIG. 1, the core yarn spinning machine 1 is configured by arranging a large number of core yarn spinning units U in parallel in the longitudinal direction of the machine base between a prime mover box MB and a dust box DB. The core yarn spinning machine is provided with a rail R along the direction in which the core yarn spinning units U are arranged, and the yarn joining cart 3 can reciprocate in the left-right direction on the rail R. The yarn splicing cart 3 travels toward the core yarn spinning unit U that requires yarn splicing, stops at a corresponding position, and performs a yarn splicing operation.

As shown in FIGS. 1 and 2, each core yarn spinning unit U is equipped with a draft device 4, a core yarn supplying device 5, a spinning device 6, a yarn feeding device 7 and a winding device 8. The draft device 4 is for drawing the sliver SL into a fiber bundle Y, and a middle with a back roller pair 9, a third roller pair 10, and an apron belt 11 each composed of a top roller and a bottom roller. The roller pair 12 and the front roller pair 13 are composed of a combination of four roller pairs.

A core yarn supply device 5 is provided above the draft device 4. The core yarn supply device 5 has a core yarn supply package SP. The spinning device 6 has an air injection nozzle and the like, and the winding device 8 has a winding package WP. The core yarn y supplied from the core yarn supply device 5 joins the fiber bundle Y from between the front roller pair 13 and the middle roller pair 12 in the draft device 4 and passes through the front roller pair 13 together with the fiber bundle Y. However, it is configured to be introduced into the spinning device 6. In the spinning device 6, the fiber bundle Y is spun by applying compressed air to generate a core yarn CY having the fiber bundle Y as a covering fiber and the core yarn y as a core yarn.

The core yarn CY sent out from the spinning device 6 is sent to the downstream side by the yarn feeding device 7, and a yarn suction device 14, a cutter device 15 for removing yarn defects, and a yarn defect detector for detecting yarn defects. 16, the film is wound around the winding package WP by the winding device 8 through the waxing device 17. The yarn suction device 14 is always in the suction state, and when the yarn defect detector 16 detects a defect in the core yarn CY, the yarn yarn device CY that has been cut by the cutter device 15 is sucked and removed. Although the detailed drawing is abbreviate | omitted for the waxing apparatus 17, the thing of the structure which provides tension | tensile_strength with the movable guide roller urged | biased in the direction away from a fixed guide roller, etc. are employable.

The yarn feeding device 7 includes a delivery roller 18 and a nip roller 19 provided so as to be in contact with the delivery roller 18. The core yarn CY delivered from the spinning device 6 is sandwiched between the delivery roller 18 and the nip roller 19 and is sent downward by the rotation of the delivery roller 18.

When the core yarn is an elastic yarn, the core yarn supply device 5 has a rotatable core yarn supply package SP, and further has a rotating roller 20 that rotates in contact with the peripheral surface of the core yarn supply package SP. is doing. The rotating roller 20 is rotated by driving of a driving motor 22 via a belt 21. The core yarn supply package SP is rotatably supported by the cradle arm 23. Then, the core yarn supply package SP rotates following the rotational driving of the rotary roller 20, and the core yarn y is sent downstream from the core yarn supply package SP.

In the above configuration, the core yarn y unwound from the core yarn supply package SP passes through the air soccer device 24, the core yarn detection sensor S1, the clamp cutter device 25, and the yarn supply guide cylinder 26, and is slightly moved by the front roller 13. It is supplied to the upstream position and introduced into the spinning device 6 together with the fiber bundle Y. Then, the fiber bundle Y is wound around the outer periphery of the core yarn y by the swirling air flow generated by the spinning device 6, the core yarn CY is spun, and sent further downward by the yarn feeding device 7. In addition, the peripheral speed of the delivery roller 18 of the yarn feeding device 7 is configured to be larger than the peripheral speed of the rotating roller 20, whereby the core yarn y is spun while being stretched to a predetermined draw ratio. The fiber bundle Y is wound and spun by the device 6.

As shown in FIG. 1, the yarn splicing cart 3 is provided so as to travel along a rail R provided in a casing 2 of the core yarn spinning machine 1 main body. The yarn splicing carriage 3 includes a suction pipe (supply-side yarn end capturing means) 27 for sucking and capturing the core yarn CY continuously supplied from the spinning device 6 on the supply side, and a core yarn CY on the winding package WP side. A suction mouth (winding side yarn end catching means) 28 for sucking and catching, and a yarn splicing device 29 for connecting each of the core yarns CY caught by the suction pipe 27 and the suction mouth 28 are provided. At the ends of the suction pipe 27 and the suction mouth 28, a suction air flow is generated by a suction flow generation source (not shown), and the yarn ends are sucked and captured. The yarn splicing device 29 includes a clamp part, a cutter part, and a splicer or knotter (not shown).

By the core yarn spinning machine 1 described above, the core yarn CY composed of the draft fiber bundle Y and the core yarn y is formed as a winding package WP by the winding device 8.

In the present invention, the core yarn CY in the winding package WP formed as described above is subjected to an upper twisting process by an upper twisting process. In this upper twisting process, the core yarn CY formed by spinning is subjected to an upper twist, and specifically, an upper twisting process is performed by a double twister 30 for spinning as shown in FIGS.

As shown in FIG. 3, the spinning double twister 30 for performing the upper twisting process has a large number of double twister units TU arranged in parallel in the longitudinal direction of the machine base between the motor end box MB and the gear end box GB. Configured. A control box CB is disposed on the front side of the motor end box MB.

The double twister unit TU includes a spindle device 31 and a winding device 32 as shown in FIG. The spindle device 31 includes a stationary plate (not shown) and a rotating plate 34 fixed to the spindle shaft 33. The yarn Y1 unwound from the yarn supply package P placed on the stationary plate that is kept stationary by magnet attraction enters the tension device 35 and is given a predetermined tension, and the rotating plate 34 below the stationary platen. The high-speed rotation of the balloon causes the balloon to reach the upper balloon guide 37.

Then, one twist is entered from the tension device 35 to the turntable 34, another twist is entered from the turntable 34 to the balloon guide 37, and the twist is twisted twice in total, so-called double twist. A twisted yarn Y2 subjected to the twisting process is provided. The spindle shaft 33 can be of a single spindle drive type by providing a spindle drive source 38 respectively.

On the other hand, the winding device 32 winds the twisted yarn Y <b> 2 around the winding package 39. The twisted yarn Y2 reaches the traverse guide 43 through the guide rollers 40 and 41 and the feed roller. The twisted yarn Y2 is traversed by the traverse guide 43, supported by the cradle arm 44, and wound around a winding package 39 that is in rolling contact with the winding drum 45.

The number of twists per meter in this type of double twisting machine is expressed by the following equation.
Number of twists = [rotation speed of rotating plate (rpm) x 2] / yarn speed (m / min.)
The yarn speed in the above formula depends on the winding speed of the winding device 32, and the rotational speed of the rotating disk 34 depends on the rotational speed of the spindle shaft in the spindle device.

According to one embodiment of the present invention, the core yarn winding package WP formed by the core yarn spinning machine 1 is set as the yarn supply package P of the spinning double twister 30 described above. A twist is applied.

In the core yarn CY with the upper twist formed in this way, the following data was obtained.

According to Table 1, when the core yarn not twisted is compared with the core yarn with the upper twist obtained by the present invention, for example, in the strength (g) of the yarn, The untwisted core yarn is 210 g, whereas the latter twisted core yarn has a twist number of 2.5 at 240 g per inch and a twist number of 4.5 g at 256 g. In (%), the former is 5.5%, while the latter is 6.1% with 2.5 twists per inch and 6 with 4.5 twists per inch. .3%, both of which obtained improved data in terms of yarn strength.

FIG. 1 is a schematic front view showing an example of a core yarn spinning machine to which the present invention is applied. FIG. 2 is a schematic side view showing a part of the core yarn spinning machine in FIG. 1 in cross section. FIG. 3 is a schematic front view showing an example of a spinning double twister. FIG. 4 is a schematic diagram for explaining a basic configuration of the spinning double twister, and is a schematic perspective view showing a single spindle portion of the double twister.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Core yarn spinning machine U Core yarn spinning unit 2 Casing SL Sliver 3 Yarn splicing device 4 Draft device 5 Core yarn supply device 6 Spinning device 7 Yarn feeding device 8 Winding device 9 Back roller pair 10 Third roller pair 11 Apron belt 12 Middle roller pair 13 Front roller pair SP Core yarn supply package WP Winding package 14 Yarn suction device 15 Cutter device 16 Yarn defect detector 18 Delivery roller 19 Nip roller 24 Air soccer device 25 Clamp cutter device 26 Yarn supply guide 27 Suction pipe 28 Suction mouse 29 Yarn splicing device 30 Double twister TU for spinning Double twister unit MB Motor end box GB Gear end box CB Control box 31 Spindle device 32 Winding device 33 Spin Dollar shaft 34 rotating disk 35 tensioning device 37 the balloon guide 38 spindle drive source 39 take-up packages 40, 41 guide roller 42 feed roller 43 traverse guide 44 cradle arm 45 wind-up drum

Claims (3)

The fiber bundle drafted by the draft device and the core yarn supplied from the core yarn supply device are guided to the spinning device, and the core yarn is spun by the spinning device, and the core yarn spun by the core yarn spinning step. A method for producing a core yarn with improved yarn strength, characterized by comprising an upper twisting step for applying an upper twist. The core yarn manufacturing method according to claim 1, wherein the core yarn is an elastic yarn. The core yarn spinning step includes a step of winding the spun core yarn by a winding device to form a package, and the package is set in a double twister for spinning and subjected to an upper twist. A method for producing a core yarn having improved yarn strength according to claim 1 or 2.

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