KR940001580B1 - Method of automatically transferring an elastic yarn from a full-bobbin to an empty-bobbin - Google Patents

Abstract

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Description

Automatic Transfer Method of Elastic Yarn

1 is a perspective view showing an example of a turret-type winding machine used to carry out the elastic yarn transfer method according to the present invention.

FIG. 2 is a perspective view illustrating the traverse device of the winder shown in FIG. 1 in detail. FIG.

3 is a perspective view illustrating a vertical motion device and a friction roll of the traverse device in the winder shown in FIG. 1.

4 is a partial cross-sectional front view illustrating the turret dish rotating device, the full-bobbin rotating device, and the empty-bobbin rotating device in the winding machine shown in FIG. 1, respectively. .

FIG. 5 is a cross-sectional view illustrating a mechanism for stopping the rotation of the full pipe in the winding machine shown in FIG. 1. FIG.

6 is a front view for explaining an operating mechanism of the actual position limiting device in the winding machine shown in FIG.

7A to 7G are front views each showing a sequential step in one example of an automatic transfer method of elastic yarn according to the present invention.

8A to 8C are perspective views illustrating various states in which the elastic yarn stays in the vacant space by the friction roll, respectively.

FIG. 10 is a plan view for explaining a form of a seal position limiting device in the winding machine shown in FIG. 1; FIG.

11A and 11B are front views illustrating two steps in a conventional method for transferring elastic yarns.

* Explanation of symbols for main parts of the drawings

1: Friction roll 2: Traverse box

3: traverse device 4: turret dish

5, 6: bobbin shaft 7: seal position limiting plate

8: Synoptic 8a: Full Building

9: vertical movement plate 11: separation bar

13 housing 21 piston unit

22: pipe 32, 33: motor

34: dish 35: pneumatic double piston

36, 45: pipe 41, 42, 43: pin

44: piston device

The present invention is a method of improving the efficiency of the automatic transfer operation of the elastic yarn by automatically switching the elastic yarn from the full-bobbin on the bobbin shaft to the empty-bobbin on another bobbin in the winding machine winding the elastic yarn continuously It is about.

Since elastic yarns have properties such as high elongation and high friction characteristics compared to general synthetic fibers such as polyamide fibers or polyester fibers, the following special yarn transferring methods have been used for transferring elastic yarns.

Japanese Patent Laid-Open No. 47-27634 discloses that a tube driven by a friction roll comes out of the friction roll, and the tube is placed in contact with the friction roll so that the tube is rotated and the tube is stopped until the tube is rotated at a desired rotational speed. A method of automatically threading a thread in a mission, that is, a loose thread between a mission and a tube is wound around the tube, and a thread automatically wound around the tube, which is pulled and broken between the tube and the tube, is transferred to the mission. The method is described.

However, since the elastic yarn has high stretchability, when the elastic yarn is broken by the stretching operation, the elastic yarn slips on the circumferential surface of the bobbin while the elastic yarn is restored to its original length.

Therefore, the elastic yarn bends because the elastic yarn partially impinges on the circumferential surface of the bobbin and the tension of the elastic yarn portion that strikes the circumferential surface of the bobbin suddenly becomes zero. In other words, the elastic yarn portion away from the circumferential surface and other portions of the elastic yarn are attached to the circumferential surface.

Typically, the elastic yarn site away from the circumferential surface is eventually attached to the circumferential surface, after which the elastic yarn is continuously wound in the duct. Nevertheless, a high-speed spinning method with a significantly high rotating surface speed of the friction rolls and bobbins was introduced, and the automatic thread change operation was not performed because the finer elastic yarns than the known elastic yarns were often wound on the friction rollers instead of being wound on the pipes.

The failure of the above-mentioned automatic thread changing operation is considered to be due to separation of the elastic yarn from the hollow tube in contact with the friction roll, and in the case of using a high speed spinning system and / or thinner elastic yarn, the elastic yarn in contact with the friction roller is used. The length per weight is increased so that the elastic yarn is wound on the friction roll.

In addition, in the method of Japanese Patent Laid-Open No. 47-27634, since the moving path of the elastic yarn released from the traverse device is not limited, the elastic yarn always extends in a direction parallel to the axis of the hollow pipe on the circumferential surface of the hollow pipe. Therefore, this situation may be a cause of failure of the automatic moving object operation.

Japanese Patent Publication No. 1-22195 describes a method for automatically transferring elastic yarns from full pipe to empty pipe. The winding machine for implementing the switching method described in Japanese Patent Publication No. 1-22195 is shown schematically in FIGS. 11 (a) and 11 (b). As shown in FIG. 11A, this winder is provided with two bobbin shafts 5 and 6, a turret dish 4 which rotatably supports the bobbin shafts 5 and 6 at positions spaced apart by 180 ° angles. ), A friction roll (1) capable of contacting the bobbin (8) mounted on one of the two bobbin shafts (5) and (6), and capable of driving the bobbin (8), and a traverse device (3). have. This winding machine has a thread position limiting plate arranged upstream of the traverse device 3 and having a thread guiding portion consisting of two inclined surfaces that form a thread retention point at the ends where the two inclined surfaces abut together ( 7) and a seal receiving opening formed between the other ends of the two inclined surfaces. When the elastic yarn is transferred from the tube to the tube, the elastic yarn is released from the traverse device by the rotation of the seal position limiting plate 7, and the tube 8a and the tube 8 are rotated by 180 degrees of the turret disk 4. The positions of are reversed with each other (see also FIG. 11A) so that the hollow tube contacts the friction roll 1 so that the elastic yarn stays in the slit arranged in the circumferential direction of the bobbin 8 on the circumferential surface of the bobbin 8 and is cut. .

In the method described in Japanese Patent Publication No. 1-22195, when the elastic yarn is transferred from the tube to the tube, the tube is brought into contact with the friction roll, so this method fails the same as in the thread transfer method of Japanese Patent Laid-Open No. 47-27634. Has the drawback that can happen.

An object of the present invention is to automatically change the elastic yarn, characterized in that when the elastic yarn is transferred from the tube to the hollow pipe in the winding machine having a friction roller, the elastic yarn is wound on the hollow pipe without being attached or wound on the friction roll to improve the efficiency of thread transfer operation. To provide a way.

Another object of the present invention is to provide an elastic yarn automatic transfer method which can be applied to a common bobbin which is not equipped with a special thread holding means such as, for example, a slit.

It is an object of the present invention to rotate a hollow tube about its axis and to feed the elastic yarn to the tube in such a state that the tube can be moved and maintained at a position away from the friction roll, and can be in contact with the elastic yarn extending from the tube. And stops the elastic yarns, winds up the cut ends of the elastic yarns in the vacant tubes, and wounds the elastic yarns wound around the vacant tubes on the surface of the vacant tubes according to the characteristics of the elastic yarns, and then makes contact with the friction rolls and the hollow tubes. In a friction-driven winder comprising a bobbin support that is in position and supports two bobbin shafts that can be repositioned with each other, and a friction roller and traverse device capable of contacting the bobbin on which the elastic yarn is wound, This is achieved by the method of automatic transfer from the full pipe to the hollow pipe on another bobbin shaft.

Preferably, the bobbin support is a turret-shaped bobbin support, and there is a space between the hollow tube and the friction roller so that the hollow tube rotates in contact with the elastic yarn extending out of the tube but not in contact with the friction roller.

Also preferably, the elastic yarn is pulled out between the tube and the tube and cut by stopping the rotation of the tube and winding the loose portion of the elastic yarn between the tube and the tube.

The elastic yarn can be transferred from the tube to the tube after removing the elastic yarn extending from the tube.

The concave-shaped thread guide having an opening of length greater than the turning width of the traverse device can be driven in such a way that the elastic yarn can be removed from the traverse device.

After the friction roller and the hollow tube contact each other, it is preferable to rotate the hollow tube so that the elastic yarn is wound 50 to 1000 times on the hollow tube so that the elastic yarn can be held firmly on the hollow tube.

In the present application specification, the term "full-bobbin" means a yarn package formed by winding elastic yarns in the vacant tubes, and the amount of the yarn wound in the vacant tubes is not limited to a specific value. In addition, the term "empty-bobbin" means a bobbin as it is, or a bobbin having a relatively short length necessary to perform an automatic cutting operation with an elastic yarn wound around the bobbin.

There are several methods for moving and maintaining the duct in a position away from the friction roll, such as the movement of the duct with respect to the friction roll in a fixed position, the friction roll with respect to the duct in the fixed position. A method of exercising or a method of mutually exercising the friction roll and the pipe may be used.

In the friction type winder used in the present invention, a hollow pipe mounted on a bobbin shaft which can be freely rotated but is not normally driven is a hollow pipe which is driven by a frictional force by contact between the friction roll and the hollow pipe. It is rotated by contacting.

Elastic yarn used in the present invention is an elastic yarn made of any one of a polyurethane-based polymer, polyester-based polymer, polyamide-based polymer, polycarbonate-based polymer; Composite elastic yarn or mixed elastic yarn made of the elastic yarn; Or an elastic yarn composed of a polymer different from the polymer as a main component. In particular, polyurethane elastic yarns having soft segments which are polyethers, polyesters, polyamides, polycarbonates, polycaprolactams, polyetheresters, or mixtures thereof are preferably used.

In order to help the understanding of the present invention, the principle of the method for automatically switching the elastic yarn from the manwan to the mission in accordance with the present invention will be described in detail with reference to the accompanying drawings.

1 illustrates an example of a turret type winder used to realize the elastic yarn switching method according to the present invention. The winder shown in FIG. 1 has two bobbin shafts 5 and 6, a bobbin shaft 5 at a position spaced 180 degrees apart from each other on a circle of a predetermined diameter having the same center as the dish 4; A turret dish (4) rotatably supporting (6), a friction roll capable of contacting the bobbin (8) mounted on one of the two bobbin shafts (5) and (6) and driving the bobbin (8) (1) and the traverse device (3).

Each end of the traverse box 2 in which the traverse device 3 is included and the friction roll 1 are supported by the vertical motion plate 9. As shown in FIG. 3, the up-and-down motion plate 9 is moved vertically by a pneumatic pair piston device 21 which is supplied with compressed air through the pipe 22 and contained in the housing 13 of the winder. can do. When no compressed air is supplied to the piston device 21, the traverse box 2 and the friction roll 1 are brought into contact with the tube 8a mounted on the bobbin shaft 5 by the weight thereof. It descends to the position which becomes, and raises with the increase of the diameter of the full pipe 8a.

As shown in detail in FIG. 4, when the mandrel 8a and the tube 8 are exchanged and replaced, the turret dish 4 is rotated by the shaft 36 which is driven by the motor 31. The positions of the full pipe 8a and the empty pipe 8 are reversed. Each bobbin shaft can also be rotated independently by driving exclusive motors 32 and 33 respectively. As will be explained in detail below, the mandrel 8a should be suddenly stopped when the thread transfer operation is performed in accordance with the present invention. The stop of the tube 8a is mounted on the shaft of the motor 32 using a pneumatic pair piston 35 through which compressed air is supplied through the pipe 36 as shown in FIGS. 4 and 5. This is done by cutting the dish 34 on both sides thereof.

As will be explained in detail below, the thread must be released from the traverse device 3 when performing the thread transfer operation according to the invention. Therefore, the seal position limiting plate 7 is pivotally attached to the front top corner of the traverse box 2 as shown in FIG. More specifically, as shown in FIG. 6, the tip of the seal position limiting plate 7 is pivotally supported by a pin 41 arranged on the front top corner of the traverse box 2, and another The pins 42 are arranged near the center of the seal position limiting plate 7 in the vertical direction in FIG. 6. One end of the portion 46 of the piston device 44 is pivotally attached to the pin 42, and the lower end of the piston device 44 is pivotally attached to the pin 43 fixed to the traverse box 2. Supported. Therefore, the seal position fixing plate 7 can be shaken about the pin 41 by supplying compressed air to the piston device 44 through the pipe 45.

As detailed in FIG. 10, several serrated depressions having the deepest points as indicated by (7a) of FIG. 10 at the distal end of the seal position limiting plate 7 It is provided. The length of the opening of the depression can be determined to be longer than the traverse length of the yarn produced by the traverse movement of the traverse device, and the thread guide 3a is horizontal with the elongated slit 3b as shown in FIG. Can be operated in a direction, and has a serrated opening at its front end. When the seal position limiting plate 7 is moved from the vertical position as shown in FIG. 1 to the horizontal position by the operation of the piston device 44, for example, as shown in FIG. 7F, the seal guide operates in the horizontal direction. The thread staying at (3a) can be easily pulled out from the thread guide (3a). Therefore, as described in detail below, since the thread can be removed at a predetermined position of the mission 8 by the mission 8 without the traverse movement, the elastic yarn attached to the mission 8 is carried out when the thread transfer operation is performed. It stays firmly in the mission 8.

An example of the method for automatically switching the elastic yarn will be described with reference to FIGS. 7 (a) to 7 (g).

FIG. 7A shows a state in which an elastic yarn having a predetermined length or a predetermined weight has been wound around the mandrel 8a which is rotated by the friction roll 1 and has to be replaced by the hollow tube 8.

In the example shown in FIGS. 7A-7G, when the elastic yarn automatic transfer operation is performed, the friction roll 1 and the traverse box 2 are first used for the operation of the piston device 21 as shown in FIG. 7 (b). As a result, the friction roll 1 is separated from the full pipe 8a. Next, as shown in Figs. 7C and 7D, the turret disc 4 is rotated 180 ° clockwise so that the positions of the tube 8a and the tube 8 are reversed, and the tube 8a is reversed. The elastic yarn Y extending from it comes into contact with the conduit 8. After this operation or at the same time as this operation, when the thread position limiting plate is raised with respect to the pin 41 at the corner of the traverse box 2, the elastic yarn Y comes out of the traverse device 3. Therefore, as shown in FIG. 7E, the elastic yarn can be brought into contact with a position designated on the surface of the hollow tube 8. After this operation, the mandrel 8a suddenly stops, and the loose portion of the elastic yarn Y between the mandrel 8a and the vacant tube 8 is wound around the manifold 8 and pulled between the mandrel 8a and the vacant tube 8 Part of is cut off. Since the elastic yarn has a high coefficient of friction and elongation, the loose portion of the elastic yarn is restored to its original length and this portion of the elastic yarn can be easily wound on the hollow pipe 3 because of its high frictional characteristics. In this state, since the friction roll 1 has already been moved from the position away from the vacant pipe 3, a part of the elastic yarn cannot be wound around the friction roll 1 as in the thread transfer operation in the conventional winding machine, A portion of the elastic yarn can be wound tightly on the vacant pipe 3 without disturbing the operation of transferring the thread from the circumference 8a to the vacant pipe 8.

After transferring the elastic yarn Y to the duct 8, when the thread position limiting plate returns to its original position, the elastic yarn Y is caught by the traverse guide 3a of the traverse device 3, and the traverse box 2 and the friction roll 1 ) Is lowered in such a manner that the friction roll is in contact with the hollow tube 3 to which the elastic yarn Y is wound, so that the normal winding operation of the elastic yarn Y starts with the traverse movement as shown in FIG. The return of the seal position limiting plate and the lowering of the traverse box 2 and the friction roll 1 can be performed simultaneously or sequentially.

As described above, when the thread cutting operation is started, the friction roll 1 should be separated from the pipe 8. That is, the distance A (see also 7f) between the surface of the friction roll 1 and the surface of the hollow tube 8 is preferably 10 mm or more, more preferably 20 mm or more. When the distance A is 5 mm or less, the length of the elastic yarn site | part which comes into contact with the friction roll 1 may become quite long, and the elastic yarn may be wound by the friction roll 1 in some cases. Therefore, a space of at least 10 mm must be provided between the surface of the friction roll 1 and the surface of the pipe 8.

If the mandrel 8a needs to be stopped, the mandrel 8a does not need to be stopped completely, but the surface velocity of the mandrel 8a is reduced compared to the surface velocity of the mandrel 8 so that the mandrel 8a and the mandrel 8 It is necessary to loosen a part of elastic yarn Y extended in between. Nevertheless, in order to reduce the fluctuations in the cutting of the elastic yarn Y and to transfer the elastic yarn from the full pipe 8a to the empty pipe 8 without any problem, it is preferable to have a means capable of completely stopping the rotation of the full pipe in a few seconds. . Therefore, it is preferable to use the cutting mechanism shown in FIG. 4 and FIG.

In the case where the elastic yarn Y is wound around the hollow pipe, the elastic yarn Y is wound around the hollow pipe 8 preferably 3 to 5 times or more, more preferably 10 to 20 times or more without traverse motion. When the number of rotations of the elastic yarn is less than 3 to 5, the elastic yarn may slide on the hollow tube or the cut end of the elastic yarn may come out of the winding layer of the hollow yarn of the hollow yarn, and in this state, the friction roll 1 may come into contact with the hollow tube 8. Then, a part of the elastic yarn wound around the hollow pipe 8 may be transferred from the hollow pipe 8 to the friction roll 1.

8A to 8C illustrate various ways in which elastic yarns are wound around the duct 8. Since the thread transfer operation according to the present invention is performed without traverse motion, as shown in FIG. 8A, several rotations of the elastic yarn Y wound at the point G on the mission are kept at the same point l ₀ on the mission 8, and then friction The roll 1 comes into contact with the hollow tube 8. Furthermore, since the thread switching operation in the conventional winding machine is performed together with the traverse motion, the elastic yarn Y wound around the G point of the point L ₀ on the vacant tube 8 is then wound at another point L ₁ . Therefore, as shown in FIG. 8B, the winding layer of the elastic yarn is loosened so that the elastic yarn wound in the hollow tube 8 can be transferred to the friction roll 1. In addition, after carrying out the thread transfer operation according to the present invention, as shown in FIG. 8C, a conventional winding operation with traverse motion can be applied to various rotating winding layers of elastic yarn on substantially the same point. Therefore, the winding layer produced | generated by the thread cutting operation can be hold | maintained firmly in the vacancy 8 by the winding operation | work by normal traverse movement.

In the case of performing the seal transfer operation according to the present invention, since it is necessary to rotate the hollow tube 8, the hollow tube 8 is rotated by the motor 33. Rotation of the hollow tube 8 by the motor 33 is preferably 50 to 1000 times after the friction roll 1 contacts the hollow tube 8 at the same surface velocity of the hollow tube 8 as that of the friction roll 1. Is done. If the operation of the hollow tube 8 stops after the friction roll 1 comes into contact with the hollow tube, the surface speed of the hollow tube can be reduced, which results in transferring the elastic yarn to the friction roll 1 in the hollow tube 8. . Therefore, the failure of the thread transfer operation can be avoided by rotating the vacant tube 8 at least 50 times after the friction roll 1 contacts the vacant tube 8.

As described above, a serrated depression, more preferably a V-shaped depression, is provided on the tip of the thread limiting plate 7. That is, when the threaded plate 7 rises compared with the pin 41, the elastic yarn contacting the recess is smoothly guided to the inclined side surface of the sawtooth recessed to reach its deepest point, namely vertex 7 (a). . Therefore, the elastic yarn can be smoothly discharged from the traverse device 3 without giving irregular tension to the elastic yarn, which ensures excellent quality of the tube 8a.

When the elastic yarn transferred to the air pipe 8 approaches the traverse device 3 by the movement of the traverse device 3, the elastic yarn may loosen too much, exceeding the traverse width of the traverse device 3. This results in a failure of the switchover operation. In order to prevent this, as shown in FIG. 9, the separator bar 11 is preferably arranged so that it can arbitrarily enter the traverse box 2 between each winding zone.

The automatic thread changing operation according to the present invention will be described below in comparison with the conventional automatic thread changing operation.

Polyurethane prepolymers are prepared from 4, 4'-diphenyl methane diisocyanate and polytetramethylene glycol by conventional methods, and the polymerized material from the polyurethane prepolymers using a binder such as ethylene diamine is dissolved in a solvent. A polyurethane stock solution of% content is made and 20d or 40d polyurethane elastic yarn is prepared from the polyurethane stock solution by dry spinning method.

20d (denier) yarn in Comparative Examples 1 and 2 corresponding to Example 1 and Example 1, 40d yarn in Comparative Examples 3 and 4 corresponding to Examples 2 and Example 2 were shown in Table 1 below. Prepared under. Table 1 shows the results of the efficiency of the automatic cutting operation.

TABLE 1

As can be seen from Table 1, when an elastic yarn having a denier of 20 d is manufactured at a spinning speed of 600 m / min or more, the thread transfer operation according to the present invention can be performed without failure, that is, at an efficiency of 100%. have.

Claims (6)

The vacant tube 8 can be moved and maintained in a position away from the friction roll 1 (7 (f) A) and in contact with the elastic yarn extending from the mandrel 8a. ) Is rotated about its axis, the elastic yarn Y is stopped from feeding the mandrel 8a to cut the elastic yarn, the cut end of the elastic yarn is wound around the hollow tube 8, and the elastic yarn portion wound around the hollow tube 8 is closed. After being wound on the surface of the hollow tube by the characteristics of the elastic yarn Y, the friction roll 1 and the hollow tube 8 are brought into contact with each other (Fig. 7 (g)), and are in different positions. Friction including a bobbin support 4 supporting two bobbin shafts 5 and 6 which can be repositioned with each other, a friction roll 1 capable of contacting a bobbin on which elastic yarns are wound, and a traverse device 3 Automatically transfer the elastic yarn (Y) from the tube (8a) on the bobbin shaft to the tube (8) on the other bobbin shaft in the driven winding machine (Fig. 1). How. 2. The winder according to claim 1, wherein the winder (figure 1) comprises a turret-shaped bobbin support 4, and a gap (figure 7 (f) A) is provided between the hollow tube 8 and the friction roll 1 The hollow yarn 8 is in contact with the elastic yarn Y emerging from the full pipe 8a but not in contact with the friction roll 1, and the hollow yarn 8 is characterized in that the hollow pipe 8 rotates from the full pipe to the hollow pipe. How to make automatic transfer. The elastic yarn (Y) according to claim 1, wherein the elastic yarn (Y) is wound around the tube (8a) and the tube (8) by stopping the rotation of the tube (8a) and winding the loose portion of the elastic yarn (Y) between the tube and the tube. A method for automatically transferring the elastic yarn from the tube to the tube, characterized in that it is cut out from between. The elastic yarn Y is removed from the tube 8a at the tube 8a after the elastic yarn extending from the tube 8a is removed from the traverse apparatus (FIGS. 2 and 3). Automatic transfer of elastic yarn, characterized in that the transfer to) from manwan to kan. 5. The concave thread guide (FIG. 10) with an opening having a length longer than the traversing width (FIG. 2, 3b) of the traverse device 3 in such a way that the elastic yarn is removed from the traverse device. A method for automatically transferring an elastic yarn characterized by driving from a tube (8a) to a tube (8). The method according to claim 1, wherein after the friction roll 1 and the pipe 8 are brought into contact with each other (7th (g)), the pipe 8 is rotated so that the elastic yarn can be wound around the pipe 50 to 1000 times. A method of automatically switching the elastic yarn to be from the tube (8a) to the tube (8).

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