JPH0585656B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing a coated elastic yarn in which a synthetic fiber crimped yarn and a polyurethane elastic yarn are simultaneously subjected to fluid treatment.

(Prior art) The demand for coated elastic yarns made of crimped synthetic fiber yarns and polyurethane elastic yarns is rapidly increasing as their uses expand.In particular, from the viewpoint of high-speed productivity, coated elastic yarns made using fluid processing methods are becoming more and more popular. It's starting to look promising.

By the way, the production of covered elastic yarn using the fluid treatment method involves introducing a crimped synthetic fiber yarn and a polyurethane elastic yarn into a fluid treatment nozzle at the same time, performing an interlacing treatment, and sequentially winding the coated elastic yarn formed by the treatment. Wind it up onto a bobbin.

In the production of such covered elastic yarn, for high-speed processing, at the end of the crimped yarn or polyurethane elastic yarn or when these yarns are broken, the coated elastic yarn on the upstream side that is manufactured subsequently is bundled with that on the downstream side. Normally, it is impossible to continuously wind the winding yarn onto the winding bobbin. Therefore, the winding bobbin is generally replaced when the crimped yarn or polyurethane elastic yarn ends or yarn breakage occurs. All of the removed bobbins are processed as small thread windings or are made into fully wound bobbins using a rewinding machine.

However, processing it as a small thread winding is undesirable as it is complicated to handle and goes against labor-saving measures, and using a rewinding machine to make a fully wound bobbin is not preferable because it is a coated elastic thread using a fluid processing method that has weak shape retention. There is a risk that the shape may change due to the re-rolling process, which is unfavorable in terms of quality.

For these reasons, it is preferable to increase the amount of covered elastic yarn to be wound onto the winding bobbin, and to
Packaged packaging is being advocated.

(Problems to be Solved by the Invention) The present invention is intended to solve the above-mentioned problems. According to the present invention, even if thread breakage occurs or the upstream bobbin becomes empty, the The yarn can be tied immediately and the required amount of yarn can be continuously wound as desired, and there is no damage to the covered elastic yarn due to rewinding in the conventional method, and manufacturing costs are reduced by simplifying the process. This will contribute to improving productivity by creating large packages that meet market demands.

(Means for Solving the Problems) The present invention relates to the production of covered elastic yarns, that is, when covering crimped yarns of synthetic fibers with polyurethane elastic yarns, a feed roller for feeding each yarn at an appropriate speed, a double yarn The alignment guide, the fluid treatment nozzle, the feed roller for the coated elastic yarn, the winding boppin, etc. are arranged in the above order from the upstream side to the downstream side in the yarn flow direction. A cutter means is provided which operates appropriately according to a signal from a sensor, and a sensor and an automatic thread splicing means are provided between a feed roller for the coated elastic yarn and a winding bobbin, and each cutter means operates according to the detection signal from these sensors. The winding bobbin is stopped at the same time as the yarn is cut, and the binding section of the automatic splicing means grasps the yarn end of the downstream coated elastic yarn cut from the stopped winding bobbin, and While suctioning each yarn end held by the cutter means using a yarn suction device, the yarn end is passed through each feed roller, an alignment guide, a fluid treatment nozzle, and a feeding roller for the coated elastic yarn to the binding section of the automatic yarn splicing means. It is characterized by guiding and implementing.

The present invention will be specifically clarified by the examples described below.

(Embodiment) The attached drawings are explanatory diagrams for one embodiment of the present invention. In the present invention, a crimped synthetic fiber yarn 1 and a polyurethane elastic yarn 2 are fed from the upstream side at an appropriate speed via feed rollers 3 and 4, respectively, and are simultaneously introduced into a fluid treatment nozzle 5 for entangling treatment. The covered elastic yarn 6 formed by this treatment is continuously wound onto a winding bobbin 7 on the downstream side.

In this manufacturing process, the end or yarn breakage of each yarn 1, 2 is detected by the sensors 8, 9, 10 arranged as shown in the figure, and based on this detection signal, the yarn cutters 11, 12 installed at fixed positions and the automatic yarn splicer are activated. In this case, the sensors 8, 9, 10 are preferably electrostatic sensors capable of detecting the stoppage or absence of the threads 1, 2, and the location and location thereof are also determined. The number is preferably set so that yarn breakage can be detected anywhere other than in the illustrated example. In addition, the thread cutter 11,1
2 operates to sequentially cut the running threads 1 and 2 in response to a detection signal from one of the sensors 8, 9, and 10, and when a thread breakage occurs, the supply of threads 1 and 2 from the upstream side is interrupted. Made to stop. At this time, the polyurethane elastic thread 2 is separated from the friction roller 16 as the bobbin support arm 14 is rotated upward by the operation of the solenoid 15. 17 is a fluid treatment nozzle 5
The automatic thread splicing means 1 is disposed between the feeding roller 17 and the winding bobbin 7 which is the winding means.
3 is provided, and the means 13 picks up the yarn end of the downstream coated elastic yarn 6 that has been cut from the winding bobbin 7 that has been stopped by a detection signal from any one of the sensors 8, 9, and 10 from above the bobbin. The yarn ends are taken out and gripped by the binding portion, and the yarn ends gripped thereby and the cut yarn ends on the upstream side are tied together for a short time as follows.

Figure 2 shows the yarn splicing state, and shows the yarn suction device 18.
While suctioning each yarn end that is simultaneously gripped at the cutters 11 and 12 during cutting using a The cut ends of both yarns are passed through the feed rollers 3 and 4 and the alignment guide 19, then through the fluid treatment nozzle 5 and the delivery roller 17 for the coated elastic yarn 6 to the automatic splicing means 13, whereby the cut ends of both yarns are automatically spliced. Winding the bobbin 7 again via the means 13
It will be connected to. The above explanation is for yarn breakage, but it is also carried out in the same way when the bobbin of crimped yarn 1 or polyurethane elastic yarn 2 is empty, and when the bobbin is replaced with a new one to continue the operation. The bobbin 7 can be freely obtained in a desired large package.

In carrying out the present invention, the automatic yarn splicing means 13 may be provided for each spindle, but as shown in FIG. 8,9,1
By constantly moving to each spindle A, B, C, and D at the thread breakage or bobbin replacement location in conjunction with the detection of zero,
The above-mentioned yarn splicing operation can be performed.

To show the above example in concrete numerical values, nylon
A 30-denier, 10-filament crimped yarn 1 and a 20-denier polyurethane elastic yarn 2 are stretched 30 times and then pulled out, and the yarns are combined at the alignment guide 19. The overfeed amount at this position is 30% for polyurethane elastic yarn 2 and 30% for nylon crimped yarn 1.
is introduced into the fluid processing nozzle 5 as 5%. In this case, the pressure of the compressed air supplied to the fluid treatment nozzle 5 is 5 kg/cm ² , and the yarn speed in the nozzle 5 is
400m/min.

The coated elastic yarn 6 manufactured in this way has an entanglement number of 112 entanglements/m, a torque of 12 times/m, and a stretch recovery rate of 75.
It is a coated elastic yarn with an excellent coverage of 6%, and the elongation rate when applying a load equivalent to the denier based on the free length is
It was 2.4 times bigger.

Note that the automatic yarn splicing means 13 splices the yarn at an instant of about 0.3 seconds, and this means that for machines with multiple spindles arranged in parallel, one set on each side, or one set on each side, or It can be placed in the center so that it can be used for both purposes.

(Effects of the Invention) According to the present invention as described above, when the yarn breaks or the supply side bobbin yarn becomes empty, the sensor automatically detects this and the yarn splicing is performed quickly and easily. This allows the desired large packaging of the covered elastic yarn to be wound onto the winding bobbin.

In addition, in the present invention, since the drive of each feed roller is not stopped, the yarn splicing operation can be carried out quickly, and therefore it can be carried out extremely efficiently, greatly contributing to the improvement of productivity.

Particularly, from the point of view of the form and entanglement strength of the covered elastic yarn, there is a problem that the form changes and damage occurs after passing through a process such as a rewinding machine, making it unfavorable in terms of quality. This allows continuous winding to the required amount without any damage, and is extremely effective in improving productivity and uniformity of quality.

[Brief explanation of the drawing]

1 to 3 illustrate an embodiment of the method of the present invention. 1... crimped yarn, 2... polyurethane elastic yarn, 3
and 4... feed roller, 5... fluid treatment nozzle, 6... coated elastic yarn, 7... winding means, 8, 9 and 10... sensor, 13... automatic yarn splicing means, 17
...Feeding roller, 19...Aligning guide.

Claims (1)

[Claims] 1. A feed roller for feeding each yarn at an appropriate speed, a guide for aligning both yarns, and a nozzle for fluid treatment in the production of covered elastic yarn in which a crimped synthetic fiber yarn is coated with a polyurethane elastic yarn. A feed roller and a winding bobbin for the coated elastic yarn are arranged in the above order from the upstream side to the downstream side in the yarn flow direction, and each feed roller is sandwiched by a sensor and a cutter means that is operated appropriately by a signal from the sensor. Furthermore, a sensor and an automatic yarn splicing means are provided between the covered elastic yarn delivery roller and the winding bobbin, and each cutter means cuts the running yarn and also connects the winding bobbin according to detection signals from these sensors. The binding part of the automatic yarn splicing means grasps the yarn end of the downstream covered elastic yarn cut from the stopped winding bobbin, and the yarn end is held by a cutter using a yarn suction device. Each feed roller while suctioning each yarn end held by the means,
A method for manufacturing a covered elastic yarn, which is carried out by guiding the covered elastic yarn to a binding section of the automatic yarn splicing means through an alignment guide, a fluid treatment nozzle, and a feeding roller for the covered elastic yarn. 2. Claim 1, characterized in that the automatic yarn splicing means moves horizontally as appropriate between multiple plows arranged in parallel.
The method for producing the described covered elastic yarn.