KR100990409B1 - Elastic yarn winding body for circular knitting machine and winding device therefor - Google Patents

Abstract

The present invention is characterized by producing a final elastic yarn winding body for circular knitting machine by rewinding the wound body wound by a conventionally used elastic yarn manufacturing method, when the conventional elastic yarn for circular knitting machine is supplied to downstream equipment and The high elongation compensates for the disadvantage that the unevenness of the tension between the layers of the package is intensified, so that it is possible to maintain uniform tension, prevent uneven package loosening, and secure the property uniformity of the manufactured circular knitted fabric. Since it is possible to manufacture a wound body, it is possible to obtain an excellent effect of minimizing the property deviation of the final product.

Elastic yarn, winding method, rewinding, rewinding machine, spandex yarn, circular knitting machine, sea power, winding body

Description

Elastic Fiber Package for Circular Knitting Machine and Winding Device therefor {Elastic Fiber Package for Circular Knitting and Winding Instrument therefor}             

1 is a front view showing a winding apparatus of a conventional elastic yarn.

Figure 2 is a front view showing a rewinding device of the elastic yarn according to the present invention.

3 is a front view showing the final elastic yarn winding produced by the present invention.

<Explanation of symbols for the main parts of the drawings>

1 body 2 elastic yarn

10: elastic yarn discharge portion 11: elevating box

12: traverse cam 13: traverse guide

14: Friction Roller 20: Turret

21: induction motor 22: turret

23: bobbin holder 24: gongbobin

25: Manbobin 25: Rewinder Feeder

26,27: Guide 28,29: Feedroll

30: stretching zone 31: tension regulator                 

32: Rewinder Bobbin 33: Guide

34: rewinder traverse 40: control unit

100: winding device

L1: Distance between rewinding branch winding start and final wound yarn

L2: Height of the end of the yarn finally wound in the rewind branch

The present invention relates to an elastic yarn winding body for a circular knitting machine and a winding device therefor. More specifically, when elastic combination yarns, stretch fabrics and stretch laminates are made from natural, semisynthetic or synthetic fibers with a circular knitting machine, elastomeric fibers are typically It is fed by a rolling takeoff mode from the wound package, in which the package is rotated and the fibers are fed to downstream equipment at a speed faster than the rotational speed of the package and maintain a constant tension. Nevertheless, tension is non-uniform, which can lead to non-uniformity of products made from these fibers. Also, because the package is rotated, the transfer tail cannot be used, and when the package is empty, downstream work must be stopped, the new package is loaded, and the end of the old package is tied to the beginning of the new package. . This reduces the work efficiency, so alternatively the transfer tail can be used as an over-end-take-off (OETO), which means that the fibers of the tube core from which the fibers were wound Is pulled onto the end. However, uneven tension problems are particularly acute in the OETO.

Feeders are disclosed in US Pat. Nos. 4,953,367 and 6,105,398, which improve the nonuniformity of tension while the fibers are unwound from the package, but such feeders are complex and expensive, and their durability is high decitex. And when high tension fibers are used. The use of conventional fixed speed rolls as feed rolls can lead to roll-wraps and fiber breaks when the fiber friction is high, even if the rolls and / or the fibers have a mat finish.

In addition, if synthetic fibers, especially synthetic fibers with high coefficient of friction and high elongation, are released from the package, it may be difficult to feed the yarn with uniform tension from all layers of the package. This is even more the case when the elastomeric fibers are wound on cylindrical tubes with a package weight of 1 kg or more, in which case the unwinding tension can vary considerably between layers in the package due to the relaxation of the package. Therefore, the production of a winding body that can supply fibers to downstream equipment with reliability and speed while maintaining uniform tension and preventing uneven package loosening is still a problem to be solved.

Accordingly, the present invention has been made to solve the conventional problems as described above, the object of the present invention is that the elastic yarn for the conventional circular knitting machine of the package due to the high coefficient of friction and high elongation when supplied to the downstream equipment The present invention relates to a winding body capable of compensating for the disadvantage that the unevenness of tension between each layer is intensified, maintaining uniform tension and preventing uneven package loosening, and at the same time, securing property uniformity of the manufactured circular knitted fabric. .

The elastic yarn winding body for a circular knitting machine of the present invention is rewound using a rewinding apparatus including a positive feeding device, and is characterized by satisfying the following formulas (1) and (2) simultaneously.

(1) 20 <Θ <60

(2) 72mm <winding width (D) <200mm

(The above Θ (winding angle) is L2 / L1 = obtained from the ratio of the distance L1 between the winding start portion of the branch pipe and the final wound yarn and the height L2 from the branch pipe to the final wound yarn in the winding bobbin) Θ value of TanΘ.)

In addition, the present invention provides an elastic yarn winding body winding device comprising a positive feeding device for producing an elastic yarn winding body for a circular knitting machine.

In order to achieve the above object, a circular knitting machine elastic yarn winding body and a winding device therefor according to the present invention will be described in detail with reference to the accompanying drawings.

Figure 1 shows a winding device of a conventional elastic yarn manufacturing process, the winding device 100 that operates continuously while winding alternately by a bobbin holder, as shown in Figure 1 the actual discharge portion capable of lifting up and down in the body (1) 10 and a control unit 40 for controlling the rotatable turret 20 and the like. The thread discharge unit 10 is a lifting box 11 that can be moved up and down, and installed on the lifting box 11 traverse guide 13 and traverse cam 12 for traversing the chamber (2) and And a friction roller 14 installed at the elevating box 11 to discharge the seal 2 from the traverse 12 to one side, and the turret unit is provided at the lower portion of the thread discharge unit 10. It consists of a motor 21, a turret 23 rotatably coupled by the induction motor 21, and a bobbin holder 24 provided at both ends of the turret 23. This bobbin holder 24 usually uses one winding device per spinning device to wind elastic yarns of about 6 to 18 End to produce general elastic yarns. Figure 2 is a spin wound according to an embodiment of the present invention, having a bobbin of the elastic yarn manufactured by the method of Figure 1 by rewinding the final winding body with a rewinder to manufacture the final elastic knitting yarn for circular knitting machine It is a front view for demonstrating the method to enable.

In Fig. 2, the yarn thread is drawn out from the yarn package feeder 25 through the guides 26, 27 and the feed rolls 28, 29 at a constant speed, and defined by 0.5 to 5 times by the stretching zone 30. Stretch at magnification. At this time, by adjusting the tension adjuster 31 for equalizing the tension to adjust the tension, the elongated thread is wound around the winding bobbin 32 to rotate past the guide 33. When wound, the traverse 34 reciprocates between the left and right sides of the bobbin 32, and bobbin winding is performed uniformly.

Fig. 3 is an enlarged view of an elastic yarn bobbin for a final knitted circular knitting machine, and the winding angle is a distance L1 between the start portion of the winding and the final wound yarn in the winding bobbin and from the branch pipe to the final wound yarn. Is the ratio of the height L2 of L2 / L1 = TanΘ.

An elastic yarn having 20 to 100 denier and a shrinkage ratio of 8 to 18% is obtained from the winding device of the elastic yarn having the above configuration. The bobbin thus manufactured has a taper. Especially, when Θ has a value between 20 <Θ <60 degrees and the winding width (D) is 72mm <D <200mm, Yarn with size deviation of 0.1 or less can be manufactured. And yarns with inner and outer layer sea power deviations of 1.0 g or less can be produced.

As a result, it is possible to manufacture a winding body that can maintain uniform tension and prevent uneven package loosening and at the same time ensure the uniformity of physical properties of the manufactured circular knitted fabric. When Θ and D are outside the above ranges, the deviation of the circumferential length of the circular knitted fabrics is 1.5 or more, and thus the object of the present invention cannot be achieved.

As described in FIG. 1 above, the prior art allows a tubular winding bobbin in which the tension of the yarn changes over the entire length as the yarn is substantially dissolved upon supply to the circular knitting machine. However, such a device cannot uniformly impart the physical properties of the final product when manufacturing an item in which the tension of the stretched yarn should fluctuate within a certain range. In addition, these devices have a problem that it is impossible to produce a low tension of the supplied thread, so that the tension adjustment problem of the feeding section and the final winding section by using the device configured by the positive feeding device in the final winding as described in FIG. By solving the problem and giving the tapered (Θ) to the wound bobbin can minimize the physical property deviation of the final product.

&Lt; Example 1 >

A polymer having a concentration of 35% was obtained by using ethylenediamine and propylenediamine as chain growth agents in the prepolymerized with polytetramethylene glycol and methylenediphenyl diisocyanate as the first polymerization. This polymer was wound up by producing a 140 denier polyurethane elastic yarn using a conventional dry spinning method. At this time, a winding body is made by winding a polyurethane elastic yarn in the cone so that the winding amount is 1000 g, and the winding body is supplied to the rewinder shown in Fig. 2 to uniform bobbin winding, and then to the polyurethane elastic yarn wound around this winding body. To evaluate the maritime properties, and to prepare each 25 pieces in five parts at intervals of 1cm from the inner layer to the outer layer of the elastic yarn yarn, the physical property deviation of the final product was measured and the results are shown in Table 1.

Comparative Example 1

The physical properties were measured in the same manner as in Example 1 except that the elastic yarn was manufactured by a conventional dry spinning method, and no rewinder was used. The results are shown in Table 1.

Comparative Example 2

The physical properties were measured in the same manner as in Example 1 except that the Taper angle (Θ) was 80 degrees when the final wound body of the elastic yarn was manufactured by the rewinding apparatus, and the results are shown in Table 1.

Table 1

Maritime power
Deviation (g) Between circular knitted products
Band Size Deviation (cm) Θ (°) D (mm) Example 1 0.8 0.1 40 150 Comparative Example 1 3 2.0 90 40 Comparative Example 2 2. ~ 2.5 1.5 80 150

As can be seen from Table 1, the case of winding using the existing method of not rewinding (Comparative Example 1) and the case of rewinding the final product by rewinding, the taper is 80 degrees (Comparative Example 2) It was found that the deviation of the sea floor power increased to 2.5g or more and consequently the deviation of the band size increased, and when the final product was wound up to 40 degrees using the rewinder (Example 1), It can be seen that the variation in the band size can be minimized and the property deviation can be minimized.

As described above, according to the winding device and the winding method of the elastic yarn according to the present invention, it is possible to minimize a substantial change in tension caused by dissolving the yarn when supplying the elastic yarn to the circular knitting machine, and is configured by a positive feeding device. Can be used during final rewinding to solve the tension control problem of the feeding section and the final winding section, and to minimize the physical property deviation of the final product by giving taper (Θ) to the wound bobbin.

Claims (2)

In the circular knitting machine elastic yarn winding body, the elastic yarn winding body is re-wound using a rewinding device including a positive feeding device having a yarn package feeder, and satisfies the following formulas (1) and (2) simultaneously: An elastic yarn winding body characterized by the above-mentioned. (1) 20 <Θ <60 (2) 72mm <winding width (D) <200mm (The above Θ (winding angle) is L2 / L1 = obtained from the ratio of the distance L1 between the winding start portion of the branch pipe and the final wound yarn and the height L2 from the branch pipe to the final wound yarn in the winding bobbin) Θ value of TanΘ.) An elastic yarn winding body winding device comprising a positive feeding device having a yarn package feeder for producing the elastic yarn winding body of claim 1.

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