JPH02160931A - Production of covered elastic fiber - Google Patents

Abstract

PURPOSE:To produce an uniform covered elastic fiber at a high speed in a good productivity while supplying a fiber rapidly and readily, by subjecting a crimped fiber and an elastic fiber to an interlacing treatment by a fluid- treating method using a device equipped with an automatic piecing means operated with a sensor and also equipped with cutters. CONSTITUTION:A crimped synthetic fiber 1 and a polyurethane elastic fiber 2 are sent out from the upper flow sides through feed rollers 3 and 4, respectively, a proper speed, a paralleled with a paralleling guide 19 and subsequently subjected to an interlacing treatment with a fluid-treating nozzle 5 and the thus produced covered elastic fiber 6 is sent out with a sending-out roller 17 and subsequently wound up on a winding means 7 to provide the covered fiber 6. In the process, sensors 8-10 are disposed in the running passageways of the fibers, respectively, to detect the cutting of the fibers and an empty bobbin on the fiber-supplying side and operate cutter 11 and 12 with the detected signals, and the cut fiber is pieced with a new fiber with an automatic piecing means 13 disposed between a covered fiber-sending roller 17 and a winding means 7, thereby providing the objective covered fiber without stopping the device.

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 treated with a fluid.

(Prior art) Demand for coated elastic yarns made of crimped synthetic fiber yarns and polyurethane elastic yarns is rapidly increasing as their uses expand. Covered elastic yarns are becoming more promising, and the production of coated elastic yarns 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 and subjecting them to intertwining treatment. The coated elastic yarn formed by the treatment is then wound up onto a winding bobbin in step 11r.

In the production of such covered elastic yarns, for high-speed processing, the coated elastic system on the upstream side, which is produced subsequent to the termination of the crimped yarn or polyurethane elastic yarn or when these yarns are broken, is separated from that on the downstream side. Binding 1-7 It is normally impossible to wind up the yarn continuously for 1° and then wind it onto the bobbin. Therefore, in general, when the crimped yarn or polyurethane elastic yarn ends or yarn breakage occurs, there is a margin of unwinding. When the take-up bobbin is replaced, all of the removed take-up bobbins are treated with small thread winding, or are made into completely wound hobbins using a rewinding machine.

However, processing with J-7 small thread winding and 1-7 is undesirable as it is complicated to handle and goes against labor saving, and using a rewinding machine to make a fully wound pobbin has poor shape retention. Rewinding on coated elastic yarn by fluid treatment method 1. There is a risk of morphological changes occurring due to the process, which is unfavorable in terms of quality.For this reason, it is better to increase the amount of covered elastic yarn to be wound onto the winding bobbin as much as possible. This is why large packaging is being advocated.

(Problems to be solved by the invention 1-7) The present invention solves the above-mentioned problems, namely, according to the present invention, thread breakage occurs! Even if the hobbin on the upstream side becomes empty at 7 or above, the yarn can be tied immediately in that state and the desired amount of winding can be performed in a continuous manner. There is no damage to the elastic threads, and we believe that reducing manufacturing costs by simplifying the process and creating large packages that meet market demands will contribute to improving productivity. (Means for) The present invention relates to the production of covered elastic yarns, that is, when covering crimped yarns of synthetic fibers with volicarethane elastic yarns, a feed roller for feeding each yarn at an appropriate speed, a guide for aligning both yarns, A fluid treatment nozzle, a feeding roller for the coated elastic yarn, a winding means, etc. are arranged in the above-mentioned order from the upstream side to the downstream side in the yarn flow direction, and a sensor and a sensor are installed in the middle of the running path of the yarn. A cutter means operated appropriately by a signal is provided, and the covered elastic thread is fed out.

It is characterized in that an automatic thread splicing means is provided between the roller and the winding means.

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. The present invention consists of a synthetic fiber crimped yarn 1 and a polyurethane elastic yarn 2.
are sent out from the upstream side at an appropriate speed through feed rollers 3 and 4, respectively, and simultaneously introduced into a fluid treatment nozzle 5 for entangling treatment 7, and the coated elastic yarn 6 formed by this treatment is continuously conveyed downstream. At his side, he was winding up 71 chair bobbins.

In this manufacturing process, the end or yarn breakage of each yarn 1.2 is detected by a sensor 8.9.10 arranged as shown in the figure, and this detection signal causes the yarn cutters to 11.12 and automatic yarn splicing means provided at fixed positions to be activated. 13 to operate,
In this case, it is preferable to use an electrostatic sensor as the sensor 8.9.10 that can detect the stoppage or absence of the yarn 1.2, and the location and number of the sensors are as follows: Occurrence 1. Preferably, the thread cutter 11.12 is set so that the thread cutter 11.12 sequentially cuts the running thread 1.2 in response to a detection signal from one of the sensors 8.9.10. When a yarn breakage occurs, the supply of yarn 1.2 from the upstream side is stopped.The polycarethane elastic yarn 2 is moved upward by the operation of the solenoid 15 when the bobbin support arm 14 is activated. 17 is the culture medium processing nozzle 5.
The automatic splicing means 13 is provided between the feeding roller 17 and the winding bobbin 7 which is a winding means for the feeding roller of the covered elastic yarn 6 which has been subjected to the interlacing process. picks up the yarn end of the cut downstream covered elastic yarn 6 from the winding bobbin 7 stopped by the detection signal of any of the sensors 8.9.10 above from the bobbin and grips it at the binding part. The yarn ends gripped by this and the upper upstream broken yarn ends are bound together in a short time as follows. while suctioning each yarn end that is simultaneously gripped at the two cutter 11 and IZ positions (at this time, the solenoid 1
5 is inoperative so that the volikarethane elastic yarn 2 is in contact with the friction roller 16), each feed roller 3.
4 and the alignment guide 19, then the fluid treatment nozzle 5 and the feeding roller 17 for the coated elastic yarn 6, and then the automatic splicing means 13, whereby the cut ends of both yarns are passed through the automatic splicing means 13. 1-7, it will be connected to the winding bobbin 7 again. The above is an explanation of thread cutting, but
When the hobbin of the crimped yarn 1 or the polyurethane elastic yarn 2 is empty, the same process is carried out when replacing it with a new bobbin to continue the operation. In carrying out the present invention, the automatic thread splicing means 13 can be provided for each spindle, but as shown in FIG. Please drive in the appropriate direction7.
Therefore, in connection with the detection of each sensor 8.9.10, the above-mentioned thread splicing work is performed by moving from time to time to each of the thread breakage or hobbin replacement locations. can do.

To show the above example in concrete numerical values, a crimped yarn 1 of 30 denier 10 filament nylon and an elastic yarn 2 of 20 denier polycasitan are stretched 30 times and then pulled out, and the yarns are combined at the alignment guide 19. do. The overfeed amount at this position is 30% for polycarethane elastic yarn 2.
, the crimped nylon yarn 1 was set at 5%, and the fluid processing nozzle 5 was introduced. In this case, the pressure of the compressed air supplied to the fluid treatment nozzle 5 is 5 kg/cm2, and the yarn speed in the nozzle 5 is 400 m/min. Number of entanglements: 112/m
The coated elastic yarn 6 was excellent in that it had a torque of 12 times/m and a stretch recovery rate of 75%, and the elongation rate when a load equivalent to the denier was applied was 2.4 times based on the free length.

In addition, the yarn splicing speed by the automatic yarn splicing means 13 is approximately Q,
This is done in an instant of 3 seconds, and this is done on a machine with multiple spindles arranged in parallel, one set on each side.
Alternatively, it can be placed in the center of the machine 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 the stiffness, and the yarn splicing can be performed quickly and easily. In addition, the covered elastic yarn to be wound up from the camellia-removing bobbin L can be made into a large bar and no cage as desired.

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

In particular, from the point of view of the shape and entanglement strength of the covered elastic yarn, if it goes through a process such as rewinding, it may change shape and become damaged, making it unfavorable in terms of quality. This makes it possible to completely connect several ships in succession without damaging them, and it is extremely effective in improving productivity as well as uniformity of quality.

It is something that can be used.

[Brief explanation of the drawing]

1 to 3 illustrate an embodiment of the method of the present invention. ■...Crimped yarn, 2...Polycarethane elastic yarn, 3
and 4... feed roller, 5... fluid treatment nozzle, 6... covered elastic yarn, 7... winding means, 8.9
and 10...sensor 13...automatic yarn splicing means, 17
...Feeding 1-70-ra, 19... Alignment guide.

Claims (2)

[Claims] (1) Manufacture of covered elastic yarn in which polyurethane elastic yarn is coated on crimped synthetic fiber yarn, including a feed roller for feeding each yarn at an appropriate speed, an alignment guide for both yarns, a nozzle for fluid treatment, and a covered elastic yarn. Yarn sending rollers, winding means, etc. are arranged in the above order from the upstream side to the downstream side in the yarn flow direction, and a sensor and a cutter means that is suitably activated by a signal from the sensor are installed in the middle of the yarn travel path. A method for producing a covered elastic yarn, characterized in that the process is carried out by providing an automatic splicing means between a feeding roller and a winding means for the covered elastic yarn. (2) The method for producing a covered elastic yarn according to claim 1, wherein the automatic splicing means moves horizontally between multiple spindles arranged in parallel.