KR810001331B1 - Apparatus of making bulked yarn - Google Patents

Abstract

The natural wool having a natural crimp of a good noblity and warmth is treated with liquid ammonia to increase the natural crimp effect and with setting or crosslinking agent to stabilize the crimp against relaxation upon wetting with water and then the wetted yarn is passed into a tube formed with a polyurethane having the arbitrarily crimping. Vibrative property by a supporting device can move in a rotational motion from the inner of the tube.

Description

Sublime Yarn Manufacturing Equipment

1 is a schematic side view of the apparatus of the present invention.

2 is a front view of the first FIG. Device.

The present invention relates to a sublime yarn manufacturing apparatus.

Bulky, i.e., sublime yarn, is highly desired in the textile industry because it is soft and warm and provides good coverage at a given fiber weight.

Most methods for manufacturing sublime yarn include a process of imparting crimp by treating the fibers in a state such as sliver, tow, and the like. When the crimps are continuously spun, the yarn thus produced has a high sublime. Crimping methods of synthetic fibers are various, and several methods have been proposed to increase the sublimeness of natural fibers.

Protein fibers, especially wool, have a natural crimp, forming a sublime thread. In some cases, however, natural crimps may be increased to improve the sublimeness of the yarn so that fibers with relatively low crimps can be used in applications that provide warmer and more elegant products or require moderately sublime yarns. It can be beneficial. Thus, in one such method described in British Patent Nos. 1,198,613 and 1,288,035, it feeds wool fibers through the belts into the crimp forming area and passes between the slow moving belts while setting the crimp with the next steam. Is described. Another process described in British Patent No. 1,385,700 treats wool slivers with alcohol, draws them between two sets of rollers rotating at different speeds, then relaxes the stretched slivers, thereby forming It consists of the steps to set the crimp. Another method proposed in the applicant's British Patent Application No. 1969/75 consists in treating wool yarn with liquid ammonia to be sublime and then setting the wool yarn in a sublimated state.

)에서의 숭고성의 증대는 제조비용을 증가시키고, 두번째 공정은 생산속도가 상업적으로 허용되는 생산속도에 비해 너무 느리며, 세번째 공정은 액체 암모니아를 취급하기 위한 특별한 장치를 요하게 된다.For some reason, such processes were not entirely satisfactory. For example, although the first method may be useful, the final word given by that method (

Increasing the sublime in) increases manufacturing costs, the second process is too slow for commercially acceptable production rates, and the third process requires special equipment for handling liquid ammonia.

The present invention overcomes the disadvantages of known processes by producing sublime yarns which significantly increase the sublime properties using relatively inexpensive devices at commercially acceptable production rates without the use of toxic chemicals.

According to the present invention, there is provided a flexible tube made of polyurethane and forming a passage of yarn, a means for supplying the wet yarn to the tube, and at least one member for rotating the trajectory on the trajectory path. And bending the tube and the yarns in the tube by the rotational movement of the member.

動) 펌프(peristaltic pump)의 작동과 유사한 방식으로 가이드 튜브의 필요한 굴곡운동을 형성한다.A device of the preferred form of the invention is interlocked (

The required bending motion of the guide tube is formed in a manner similar to the operation of a peristaltic pump.

It is necessary to bend the thread long enough to form the sublimation effect.

Therefore, the number of bends, ie the residence time of the yarn in the tube (depending on the value of tube length ÷ thread production rate) x the number of bends per minute, must be sufficiently large.

However, it was found that if the residence time was longer than expected from the tube length and yarn production rate, the bend number would be greater than expected from those two variables. It is believed that the tube acts in the same way as J-Vox so that the seal accumulates inside the tube before the seal is released from the tube. This effect is greater when the ratio of tube section / number is increased. Thus, at a certain number of quarters and production rate, the residence time is greater in large diameter tubes. That is, the number of bends increases with the tube diameter. At least 300 bends are required to obtain optimal sublime, and for good results the number should be at least 400, preferably at least 500. In each tube, there is a bending rate that does not improve the sublimation effect even if the bending rate is increased further.In silicone resin tubes, this maximum bending rate is about 1000, but in the polyurethane tube it is found that it is 1500 or more, Urethane tubes are very desirable and can significantly increase the output of the device.

When passing one (or more) yarns through a tube, the ratio of the tube section to the number of yarns (or the total number of yarns) should be at least 15 mm 2 / ktex, preferably at least 20, more preferably at least about 40 do. If the ratio exceeds 60, the substance itself can fold and become tangled and uneven.

The apparatus of the present invention can produce a sublime yarn having an acceptable degree of sublimeness at the same production rate as that of a conventional spinning process using vibration guide tubes of several decimeter lengths.

When the vibrational motion is a transverse wave, the vibration imparts a force to the yarn to carry the wool through the tube.

Thus, when there is no tension in the wool at either end of the tube, there is a direct relationship between the conveying speed and the oscillation frequency. Thus, although it is possible to carry the wool without tension through the guide tube, it is desirable to use only the conveying action in taking out the sublime yarn from the driven roller and drawing the sublime yarn into the guide tube.

In short, the apparatus consists of a straight tube which reciprocates and bends by a crank, cam or similar mechanism. It is preferable that the inner end surface of the tube is circular, and if it is made into another shape, a thread becomes an unpreferable shape.

The device of the present invention is significantly facilitated by using a flexible tube connected to the rest of the device in only one or several places. Tubes of elastic material, such as rubber, or spiral springs with a small pitch may be used to construct the flexible tube. Since the recovery rate of the flexible tube is relatively low, corrugated motion occurs and it provides a desirable effect on the sublimation process.

In the simplest example, stationary wave operation occurs. However, a traveling wave may be generated by appropriate adjustment of the device generating the motion. In that case, in addition to the sublimation action, a transport action is also obtained.

Since the present invention takes advantage of the unique properties of protein fibers, especially wool, it is preferred that the content of such fibers is as high as possible in order to obtain good results. However, a mixture of other fibers and wool may be used at a blending ratio above the minimum that will yield an effective sublimation effect.

Sublimation should be done in the presence of pollination. Ideally, an aqueous milling solution (for example, an acid or alkaline solution containing soap or cleaning material) is carried out through the tube along with the seal. Temperatures above 30 ° C., for example, by heating the milling liquor reservoir to the desired temperature by means of an immersion heater or steam pipe and circulating the solution from the reservoir through the tube back to the reservoir. Is ideally maintained.

Speeds up to 20 m / min can be obtained, but speeds of 6-12 m / min are preferred for general purposes.

The present invention will be described in more detail by way of example with reference to the accompanying drawings.

As shown in the figure, a pair of end plates 12 are mounted on the rotation shaft 10, and six rotors 14 are provided on the end plates at equal intervals. The rotor 14 comprises a roller 16 of smooth plastic material mounted on an axis 18 supported between the end plate 12 and the plurality of support disks 20. The rotating shaft 10 is mounted on a bearing 22 supported on the frame of the apparatus and is rotated by the belt drive pulley 24.

A flexible guide tube 26 made of urethane rubber is attached to bosses 28 and 30 on top of the device. The guide tube 26 is tensioned so that the contact between the tube 26 and the roller 16 is maintained during rotation of the rotating shaft and the assembly of the rotor but without flattening of the tube. Each of the inlet bosses 28 supports a short metal tube 32 that protrudes into a header tank 34 (not shown in FIG. 2) filled with milling solution 36. An input heater (not shown) maintains the temperature of the milling solution at 60 ° C.

The incoming seal 38 is wetted by the milling solution 36 and passes through the guide tube 26. Each of the outlet bosses 30 has an elongated guide tube 40 which projects above the milling fluid surface. The solution passing through the guide tube 26 is returned to the tank 34 through the hole 42 of the tube 40 without disturbing the discharge of the sublime 44. The roller 46 is installed to stabilize the supplied sliver 38 and the manufactured bulky yarn 44.

As seen from FIG. 1, the guide tube 26 is bent where he contacts the roller 16 and is straight between the rollers 16. Thus, when the axis of rotation 10 is driven, the bend of the tube 26 moves with the roller 16, and the tube portion between the rollers exhibits a magnitude of displacement towards the center axis of rotation 10. The result is a transverse traveling wave motion of the guide tube 26. The yarn 38 becomes the sublime yarn 44 by this lateral traveling wave operation.

Despite the fact that roller 16 is free to rotate around its axis 18, a lot of slip occurs at roller 16 between tube 16 and tube 26. Therefore, it is advantageous to inject lubricant. Water or excess milling solution lubricates this and significantly reduces wear on tube 26.

Thread 38 is wound on a winding roller at the desired production speed. The speed of the rotating shaft is generally in the range of 400-1500 rpm, and a speed of 700-900 rpm is preferable for good results.

At a production speed of about 6 m / min, a sublimation sufficient to the general use of wool is usually obtained. However, when higher sublimation is required, for example if the sliver contains wool and other fibers, it can reduce the production rate and increase the rotor speed, ie increase the number of bends.

Longer tubes may also be used, or two or more devices may be used in series.

Belts can be placed between the rollers and the tubes to protect the tubes and extend their useful life. The belt is attached to the frame of the machine and is made of a material such as reinforced rubber that is flexible but not elongated.

If the movement of the tube end is large, it weakens the tube and eventually damages the tube. Therefore, a vibration buffer of the tube near the boss 30 may be suppressed by attaching a buffer of elastic material to the frame. Such a cushioning material may be made of, for example, foam rubber. Another way to reduce this vibration is to mount a flexed, downwardly inclined connection for tube 26 to boss 30 or to increase the spacing from the rotor assembly to boss 30. It is preferable to mount the polyurethane conical boss 31 on the polyurethane tube 26.

The seal can be supplied to the device in the direction of rotation of the device or vice versa, but the former case is preferred.

As described above, significant advantages are obtained by using a flexible tube of polyurethane instead of a silicone rubber tube. It is preferable that these tubes be as thin as possible, and a wall thickness of about 1 mm is preferred in view of ease of manufacture and advantages of thickness.

The polyurethane tubes are manufactured and sold by Dunlop Plastics Division, Rexham, UK under the trademark PRESCOLLAN PCE 1589. The material itself (grade 23017) has a density of 1.17 Mg / m 3, shore hardness (ASTM D 2240) A: 88 and B: 37, tensile strength (ASTM D 412 DicD) 45 MN / ㎡, elongation at break (ASTM D 412). ) 610%, modulus of elasticity (using Dunlop Tripsometer BS 903) 49.

Conical bosses for suppressing tube vibration are molded directly to the ends of polyurethane tubes using urethane prepolymer molding compositions such as those sold by the Compounding Incorporated Limited under the name CIL-monotan. It may be attached. The composition is a composition for molding polyurethane based on a one-component polyester.

The effective diameter of the tube can be changed by attaching an inner diameter restrictor at the outlet end of the tube. Thus, a wide tube can be used for a given seal. It is advantageous to use a means for withdrawing the yarn from the tube when the diameter of the tube is limited to the size of the yarn.

Claims (1)

A flexible tube of polyurethane and forming a passageway of the yarn, means for supplying the wetted yarn to the tube, and at least one member for rotating the trajectory on the trajectory through the passageway The sublimation yarn manufacturing apparatus characterized by bending a tube and the yarn in the tube.

Images