JP6946638B2 - Revolving type winding method of synthetic fiber yarn - Google Patents

Description

The present invention relates to a winding method used in a melt spinning process of synthetic fibers. More specifically, the present invention relates to a revolving winding method capable of forming a tail capable of smoothly performing end yarn processing in a multifilament winding package provided for mixed fiber processing.

The multifilament melt spinning process, which is composed of a plurality of single yarns, is generally used in order to prevent yarn breakage and fluffing due to scratching of the single yarn in the process and to obtain good process passability in higher-order processing. After the yarn is subjected to a fluid entanglement process called entanglement, it is wound on a bobbin. Since the take-up package obtained here is continuously subjected to high-order processing in the next process, it is necessary to connect the yarn in the outermost layer and the thread in the innermost layer between different take-up packages. An end thread called a tail that is continuously connected to the product part is formed in the innermost layer part (81'in FIG. 1). Since the entangled threads are focused, it is possible to provide a take-up package in which a suitable tail 81'is formed and the threads can be smoothly connected. Here, a suitable tail means that the tail can be gripped by hand or the like and the thread length required for thread connection is wound, that is, the total length of the tail 81'or at least the thread gripping portion of the tail 81'. The thread on the 10'(FIG. 1) side is not loosened, and the general tail length is about 1 to 2 m.

Further, in the high-order processing, in the mixed fiber processing in which different yarns are entangled by the injection fluid, the yarns are in a good open state in the mixed fiber nozzle to which the injection fluid is applied, so that the yarns are fluid entangled in the melt spinning process. Multifilaments that are lightly treated or do not undergo fluid entanglement treatment are provided. In recent years, in the multifilament melt spinning process, in order to efficiently mass-produce, the winding speed is as high as 4000 to 5000 m / min, and the winding position and the standby position are alternately switched by revolving a pair of spindles, and the winding position is continuous. The thread is wound up. When switching multifilaments that have not been sufficiently fluid entangled, the problem is that the single yarns are loosened due to tension reduction due to yarn bending that inevitably occurs in switching operations such as revolving, and a suitable tail is not formed. rice field.

To solve this problem, in order to suppress the loosening of the single yarn of the tail 81', in order to form only the tail 81'with entangled threads, the winding method described in Patent Document 1, more specifically, the yarn. The yarn is wound around the bobbin at the winding position while performing fluid entanglement processing, and the bobbin is moved to the standby position each time the yarn is fully wound, and the empty bobbin at the standby position is moved to the winding position to continuously wind the yarn. A winding method is disclosed in which the supply amount of the fluid used for the fluid entanglement treatment at the time of switching or the pressure is made larger than that at the time of normal winding.

Specifically, it is shown with reference to FIGS. 2 and 3 of the present application. 2 and 3 are views for explaining the state at the time of switching by illustrating the main parts of the revolving winder, and FIG. 2 is a schematic front view and FIG. 3 of the winder as viewed from the spindle axial direction. Is a schematic plan view of the winder shown in FIG. 2 for explaining the relationship between the traverse mechanism and the thread path.

First, the basic switching operation will be described. FIG. 2 illustrates a state in which, in a revolving winder, after the bobbin in the winding position is fully wound, the empty bobbin in the standby position is revolving to the winding position and the thread is switched to the empty bobbin side. In FIG. 2, 50 is a take-up portion, and a pair of spindles 2 and 2'are mounted on the circumference of the turret board 1 at intervals of 180 °, and bobbins 3 and 3'are mounted on each of them. ing. Further, thread path regulation bars 4 and 4'are attached at intermediate positions sandwiched between the pair of spindles 2 and 2'in the circumferential direction, respectively. A traverse device 60 is arranged above the take-up portion 50, and as shown in FIG. 3, the traverse device 60 arranges a plurality of sets of rotating blades 6 and arranges the traveling threads Y supplied from the swing fulcrum guide 16. The rotating blade 6 swings along the traverse guide plate 7 while moving left and right.

FIG. 2 shows a state immediately after revolving, in which the spindle 2 equipped with the full-winding bobbin 3 moves to the lower standby position, and the spindle 2'mounted with the empty bobbin 3'moves to the upper winding position. From this state, as shown in FIG. 3, the thread gathering guide 8 above the traverse device 60 moves from the position of the solid line to the position of the chain line, and during the movement, the running thread Y is hooked and removed from the rotating blade 6. And, it is moved beyond the traverse area of the product unit 80 to the side end portion of the traverse guide plate 7. As a result, the traveling thread Y supplied from the swing fulcrum guide 16 passes through the left edge c of the thread introduction plate 12 and the regulation pin 5 on the thread path regulation bar 4, and is bunch-wound on the outermost layer portion of the full-winding bobbin 3. It is rolled up to form B. The bunch winding B is a thread bent at the time of switching and is different from the thread quality of the product part, so that it is finally removed.

Next, as shown in FIG. 2, the thread hooking guide 9 collapses from the position of the solid line to the position of the chain line, and on the way, the running thread of the thread path d between the left edge c of the thread introduction plate 12 and the regulation pin 5 Hook Y and press it so that it wraps around the empty bobbin 3'. After that, the thread hooking guide 9 is moved in the spindle axial direction by the drive device 13, and when the traveling thread Y passes over the thread gripping portion 10'engraved at the end of the empty bobbin 3', the traveling thread is passed. Y is captured by the thread gripping portion 10'and wound around the empty bobbin 3'to cut the thread and switch. After that, the traveling yarn Y moves to the central portion of the traverse due to the tension of the yarn itself, is caught by the rotating blade 6, and starts winding the product portion. The take-up package wound by the empty bobbin 3'is shown in FIG. 1, and the thread wound from the thread grip portion 10'to the product part 80'of the bobbin 3'in this process is the tail 81'.

In order to obtain a suitable tail in this switching operation, it is as follows. When the thread gathering guide 8 moves the traveling thread Y to the side end of the traverse guide plate 7, the pressure of the injection fluid supplied to the fluid entanglement processing device 17 installed above the traverse device 60 is taken up. The control unit 70 issues a command to the pressure adjusting valve 18 so that the pressure is higher than the current pressure. After that, when the thread hooking guide 9 starts moving in the spindle axial direction through the above series of processes, the control unit 70 issues a command to the pressure adjusting valve 18 so that the pressure of the injection fluid becomes the pressure at the time of winding. ..

By this command, the yarn at the position of the fluid entanglement processing device 17 at this time is no longer entangled, and the yarn is sequentially wound by the winding portion 50. In parallel with this, the thread hooking guide 9 moves the running thread Y to the thread gripping portion 10'engraved at the end of the empty bobbin 3'by the driving device 13, and the running thread Y moves the running thread Y to the thread gripping portion. The thread is cut by being caught by 10'and wrapped around an empty bobbin 3'. After that, the tail 81'(FIG. 1) is formed between the thread grip portion 10'and the product portion 80'(FIG. 1), but the threads that have begun to form the tail 81'(FIG. 1) are entangled. It is considered that a suitable tail can be obtained by changing to a thread that is not entangled during tail formation.

Japanese Unexamined Patent Publication No. 2003-238029

As a result of verifying the above-mentioned Patent Document 1, all the entangled yarns are wound on the full bobbin 3 side, and the single yarn of the tail may be loosened, or the tail 81'on the empty bobbin 3'side is surely. Although it is formed of entangled threads, it may penetrate into the product part 80', and a suitable tail cannot be stably obtained.

The cause was investigated in detail. As the driving device 13 for moving the thread hooking guide 9 in the spindle axial direction, a cylinder or a rotary actuator using a fluid such as air or oil is generally used, but the pressure and viscosity of the supplied fluid are used. It has become clear that the operation of the thread hook guide 9 in the spindle axial direction is not always constant due to variations in the flow rate, wear of sliding parts inside the cylinder, and the like.

Further, regardless of the operating state of the thread hooking guide 9, the threads that are no longer entangled by the command from the control unit 70 are sequentially wound by the winding unit 50, so that the operation of the thread hooking guide 9 is extremely slow. If all the entangled threads are wound on the full bobbin 3 side and the single thread of the tail 81'is loosened, and conversely, if the thread hooking guide 9 operates extremely quickly, the tail 81 on the empty bobbin 3'side is used. 'Is formed by entangled threads, but it penetrates into the product part 80'. Further, the suitable tail length is about 2 m as described above. For example, when the bobbin diameter is 134 mm and the rotation speed of the empty bobbin at the time of switching is 5000 m / min, the tail forming time is as short as 24 msec, so that the yarn is used. It can be seen that the operating state of the hooking guide 9 is a major factor for obtaining a suitable tail.

In the present invention, in order to solve the problems of the prior art and to smoothly perform the end yarn processing in the multifilament provided for the confounding process, the entire length of the tail or at least the single yarn on the thread gripping portion side of the tail is separated. In addition, the product section is provided with a more stable winding method for obtaining a winding package containing no entangled yarns.

The problem of the present invention can be solved by the following configuration.
(1) A pair of spindles equipped with bobbins are arranged so as to alternate between a winding position and a standby position by revolving to form a winding portion, and a pressure-adjusted injection fluid is placed above the winding portion. A device in which a fluid entanglement processing device to be applied to the running thread is arranged.
When the bobbin at the winding position is full, a thread hook guide that revolves to switch the position between the full bobbin and the empty bobbin and then moves the running thread to the empty bobbin is attached to the side end of the empty bobbin. A revolving type of synthetic fiber thread that switches the thread from a full-wound bobbin to an empty bobbin by moving the running thread to the engraved thread grip portion and winding the running thread around the thread grip portion to cut the thread. In the winding method
Since the revolving of full bobbins and empty bobbins started
The pressure of the injection fluid of the fluid confounding treatment device is made higher than that at the time of winding,
After that, after the position of the thread hooking guide reaches the position where the running thread passes through the thread grip portion engraved on the measuring end of the empty bobbin ,
A revolving type winding method for synthetic fiber threads, which comprises returning the pressure of the injection fluid to the pressure at the time of winding.

In the revolving winding method of the present invention, the pressure of the injection fluid of the fluid entanglement device is made larger than that at the time of winding at the time of switching, and the pressure of the injection fluid of the fluid entanglement processing device is at the time of winding with reference to the position of the thread hooking guide. By returning to the pressure, the full length of the tail or at least the single thread on the thread gripping part side of the tail is not loosened, and the product part is a mixed fiber processing that can smoothly perform end thread processing that does not include confounding threads. A multifilament take-up package for use can be obtained.

Schematic diagram of the take-up package. It is a figure for demonstrating the main part of the conventional revolving type winding apparatus and explaining the state at the time of switching, and is the schematic front view seen from the spindle axial direction. It is a figure for demonstrating the main part of the conventional revolving type winding apparatus and explaining the state at the time of switching, and in particular, the schematic plane of the winding apparatus shown in FIG. 2, which explains the relationship between a traverse mechanism and a thread path. figure. It is a figure for demonstrating the main part of the revolving type winding apparatus of this invention, and explaining the state at the time of switching, and is the schematic front view seen from the spindle axial direction. It is a figure for demonstrating the main part of the revolving type winding apparatus of this invention, and explaining the state at the time of switching, and in particular, the outline of the winding apparatus shown in FIG. 4 explaining the relationship between a traverse mechanism and a thread path. Plan view.

Next, an embodiment of the present invention will be described in detail with reference to FIGS. 4 and 5. 4 and 5 are views for explaining a state at the time of thread switching by illustrating a main part of the revolving winder of the present invention, and FIG. 4 is a schematic front view of the winder when viewed from the spindle axis direction. FIG. 5 is a schematic plan view of the winder shown in FIG. 4, which explains the relationship between the traverse mechanism and the thread path. Although the drawings are similar to those of FIGS. 2 and 3, respectively, the drive device 13 of the thread hooking guide 9 is provided with a signal 15 for outputting the position information detected by the position detection unit 14 and the position detection unit 14 to the control unit 70. Is different.

First, the basic switching operation of the present invention will be described. In the revolving type winder of FIG. 4, after the bobbin at the winding position is fully wound, the empty bobbin at the standby position is revolving to the winding position, and the state when the thread is switched to the empty bobbin side is illustrated. In FIG. 4, 50 is a take-up portion, and a pair of spindles 2 and 2'are mounted on the circumference of the turret board 1 at intervals of 180 °, and bobbins 3 and 3'are mounted on each of them. Has been done. Further, thread path regulation bars 4 and 4'are attached at intermediate positions sandwiched between the pair of spindles 2 and 2'in the circumferential direction, respectively. A traverse device 60 is arranged above the take-up portion 50, and as shown in FIG. 5, the traverse device 60 arranges a plurality of sets of rotating blades 6 and arranges the traveling threads Y supplied from the swing fulcrum guide 16. The rotating blade 6 swings along the traverse guide plate 7 while moving left and right.

FIG. 4 shows a state immediately after revolving, in which the spindle 2 equipped with the full-winding bobbin 3 moves to the lower standby position, and the spindle 2'mounted with the empty bobbin 3'moves to the upper winding position. From this state, as shown in FIG. 5, the thread gathering guide 8 above the traverse device 60 moves from the position of the solid line to the position of the chain line, and during the movement, the running thread Y is hooked and removed from the rotating blade 6. And, it is moved beyond the traverse area of the product unit 80 to the side end portion of the traverse guide plate 7. At this time, the control unit 70 issues a command to the pressure adjusting valve 18 so that the pressure of the injection fluid supplied to the fluid confounding processing device 17 installed above the traverse device 60 is higher than the pressure at the time of winding (command A). ). The traveling thread Y supplied from the swing fulcrum guide 16 passes through the left edge c of the thread introduction plate 12 and the regulation pin 5 on the thread path regulation bar 4, and the confounding thread bunches to the outermost layer of the full-wound bobbin 3. It is rolled up to form a roll B. Since the purpose of the timing of the above-mentioned command A is to form the tail with entangled threads, the timing is not necessarily limited to the above-mentioned timing, and the command A is issued after the bunch winding B starts to be formed. You may.

Next, as shown in FIG. 5, the thread hooking guide 9 collapses from the position of the solid line to the position of the chain line, and on the way, the running thread of the thread path d between the left edge c of the thread introduction plate 12 and the regulation pin 5 Hook Y and press it so that it wraps around the empty bobbin 3'. After that, the drive device 13 moves the thread hooking guide 9 in the spindle axial direction. When the thread hooking guide 9 reaches a position where the traveling thread Y passes through the thread gripping portion 10'engraved at the end of the empty bobbin 3', the position detecting unit 14 sends a command signal 15 to the control unit 70. (Command B), the control unit 70 that receives the signal 15 issues a command to the pressure regulating valve 18 to return the pressure of the injection fluid to the pressure at the time of winding (command C). While the traveling thread Y, which has been fluid entangled by the pressure at the time of winding at the position of the fluid entanglement processing device 17, passes through the swing fulcrum guide 16 and the left edge c of the thread introduction plate 12, the traveling thread Y becomes The yarn is caught by the yarn gripping portion 10'and wound around the empty bobbin 3'to cut the yarn, and while the tail 81'is being formed, the yarn is fluid entangled with the pressure at the time of winding from the entangled yarn. Instead of strips, a suitable tail 81'can be obtained.

That is, in the conventional method, it is difficult to form a suitable tail due to the variation in the operation of the drive device of the thread hooking guide. By changing the pressure of the injection fluid supplied to the fluid confounding treatment device based on the arrival at the position, a more stable and suitable tail can be obtained.

In order to obtain a suitable tail, the timing of the command C can be arbitrarily changed depending on the process conditions such as the winding speed and the distance from the fluid entanglement processing device 17 to the winding portion 50. For example, when the winding speed is high and the distance from the fluid entanglement processing device 17 to the winding portion 50 is short, the traveling thread Y that has been fluid entangled with the pressure at the time of winding at the position of the fluid entanglement processing device 17 is Since the take-up unit 50 is reached in a short time, the command C is issued immediately after the command B. On the contrary, when the winding speed is slow and the distance from the fluid entanglement processing device 17 to the winding unit 50 is long, the command C can be issued with a delay time between the command B and the command C.

Further, the position detection unit 14 may be a mechanical detection means that detects only when the thread hooking guide 9 reaches a predetermined position, or a means that can constantly detect the position by a servomotor or the like. In any case, it is preferable to be able to arbitrarily change the timing at which the command B is issued. If the operation variation of the drive device 13 is within an acceptable range, the thread hooking guide 9 may issue the running thread Y before passing through the thread grip portion 10'engraved at the end of the empty bobbin 3'. can.

Further, the drive device 13 may be a cylinder or a rotary actuator using a fluid such as air or oil, but in order to reduce the operation variation, a stepping motor or a stepping motor that moves the drive device 13 while controlling the movement position and the movement speed. It is more preferable to apply a servo motor or the like.

Hereinafter, the present invention will be described in detail with reference to Examples. The evaluation in the examples was carried out according to the following method.

(1) Confounding degree (CF value) of the product part
The degree of entanglement of the product part was measured with an R-2072 entanglement measuring device manufactured by Rosshield. A needle is inserted into a thread that is fed at a speed of 5 m / min, and when the needle reaches the entanglement point, the running of the thread is hindered by the needle and the thread tension increases. When the yarn tension exceeds 15.5 cN, it is detected as an entanglement point. Then, after the needle is pulled out and the thread is fed out by 10 mm, the needle is inserted into the thread again and the measurement is restarted. The opening length between the entangled points was measured, and the CF value was calculated from the opening length per 1000 mm by the following formula.
CF value (product part) = (1000 (mm)) / (spread length L (mm)).

(2) Tail entanglement (CF value)
The degree of confounding of the tail was measured by the water confounding method. Specifically, the yarn was floated on the water surface, the entanglement point was visually inspected by the spread of the filament, and the CF value was calculated from the spread length per 1000 mm by the following formula.
CF value (tail) = (1000 (mm)) / (spread length L (mm)).

(3) Pass / Fail Judgment of Tail The take-up package was peeled off to the innermost layer, and a CF value (product part) of 1 or less and a CF value (tail) of 3 or more were accepted. When the CF value (tail) is 3 or more, the single yarn does not disperse and the end yarn can be processed smoothly. Therefore, this value was used as the acceptance criterion.

The switching was repeated 30 times, and if 98% or more passed, it was evaluated as "good", and if it was less than 98%, it was evaluated as "bad". In addition, among the failures, the number of times that all the entangled threads are wound on the full bobbin side and the tail does not include the entangled threads and the number of times that the tail is formed by the entangled threads but penetrates into the product part are recorded. bottom.

(Example 1)
PET containing 0.3% by mass of titanium oxide polymerized and pelletized by a conventional method was melted by a pressure melter. The molten polymer was passed through a pipe provided in a spin block kept at a temperature of 298 ° C. and a measuring pump for measuring a predetermined polymer flow rate, and led to a pack. A filter and a known spinneret were provided in this order in the pack, and threads were spun from the spinneret.

Then, air was blown from one direction to the running yarn at a wind speed of 25 m / min to cool and solidify. Next, the running yarn was lubricated with an oiling roll so that the amount of the spinning oil was 0.9% by mass with respect to the drawn yarn. 0.01 MPa of air is blown from the EC-O2 type migration nozzle onto the running thread, and the first hot roll with a surface speed of 1500 m / min and a surface temperature of 105 ° C., the second hot roll with a surface speed of 4100 m / min and a surface temperature of 140 ° C. Using a take-up device with a take-up speed of 4110 m / min via a roll, an EDV type entanglement nozzle which is a fluid entanglement processing device, a third godet roll having a surface speed of 4141 m / min, and a fourth godette roll having a surface speed of 4141 m / min. I rolled it up. The distance from the EDV type entangled nozzle to the thread hooking guide 9 shown in FIG. 5 was 5 m, and the obtained multifilament had a fineness of 135 dtex and a number of filaments of 18.

As the take-up device, a KW-68BR manufactured by Toray Engineering Co., Ltd. having a bobbin diameter of 134 mm having the switching mechanism shown in FIG. 4 was used. When the thread gathering guide 8 moves the traveling thread Y to the side end of the traverse guide plate 7, the pressure of the injection fluid supplied to the fluid entanglement processing device 17 installed above the traverse device 60 is reduced to 0. A command was issued to set the pressure to 45 MPa (command A). An electric cylinder RCA2-RN4NA manufactured by IAI is used as the drive device 13 of the thread hooking guide 9, and the position of the thread hooking guide 9 is constantly detected. When the position where the thread gripping portion 10'is engraved at the end is reached, the position detecting unit 14 issues a command signal 15 to the control unit 70 (command B), and the control unit 70 receives the signal 15. A command was issued to the pressure regulating valve 18 so that the pressure of the injection fluid would be 0.1 MPa at the time of winding (command C).

(Comparative Example 1)
As the take-up device, a KW-68BR manufactured by Toray Engineering Co., Ltd. having a bobbin diameter of 134 mm having the switching mechanism shown in FIG. 2 was used. The drive device of the thread hook guide 9 uses an air cylinder CA03-16-ND-35-P manufactured by New-Era, and when the thread hook guide 9 starts moving in the spindle axial direction, the pressure of the injection fluid is applied. Switching was performed in the same manner as in Example 1 except that the control unit 70 issued a command to the pressure adjusting valve 18 so that the voltage at the time of winding was 0.10 MPa.

The results of the above Examples and Comparative Examples are shown in Table 1. In the example, all 30 switchings were passed, but in the comparative example, 13 out of 30 switchings were passed. Among the failures of the comparative example, the number of times that all the entangled threads were wound on the full bobbin side was 5 times, and the number of times that the entangled threads entered the product part was 12 times, resulting in a large variation. On the other hand, in the embodiment, it is considered that a more stable and suitable tail could be obtained by changing the pressure of the injection fluid supplied to the fluid entanglement processing apparatus with reference to the position of the thread hooking guide.

A revolving winding method in which the pressure of the injection fluid of the fluid entanglement device is increased at the time of winding at the time of switching of the present invention, and the pressure of the injection fluid of the fluid entanglement processing device is used as the pressure at the time of winding based on the position of the thread hooking guide. For mixed fiber processing, the total length of the tail or at least the single thread on the thread gripping part side of the tail is not loosened, and the single thread processing that does not include confounding threads in the product part can be smoothly performed. A multifilament take-up package can be obtained.

1 Turret board 2, 2'Spindle 3, 3'Bobbin 4, 4'Thread path regulation bar 5, 5'Regulation pin 6 Rotating blade 7 Traverse guide plate 8 Thread guide 9 Thread hook guide 10 10' Thread grip 11 Touch roll 12 Thread introduction plate 13 Drive device 14 Position detection unit 15 Signal 16 Swing fulcrum guide 17 Fluid entanglement processing device 18 Pressure control valve 50 Winding unit 60 Traverse device 70 Control unit 80, 80'Product unit 81, 81' Tail c Point on the side surface of the thread introduction plate 12 d Thread path B Bunch winding Y Running thread

Claims (1)

A pair of spindles equipped with bobbins are arranged so as to alternate between a take-up position and a standby position by revolving to form a take-up portion, and a pressure-adjusted injection fluid is run above the take-up portion. When the bobbin at the take-up position is full, the position of the full-wound bobbin and the empty bobbin is switched by revolving, and then the running thread is moved to the empty bobbin. The thread hooking guide moves the running thread to the thread gripping portion engraved on the side end of the empty bobbin, and the running thread is wound around the thread gripping portion to cut it from the full-wound bobbin to the empty bobbin. In the revolving type winding method of synthetic fiber yarns that switch yarns,
Since the revolving of full bobbins and empty bobbins started
The pressure of the injection fluid of the fluid confounding treatment device is made higher than that at the time of winding,
After that, after the position of the thread hooking guide reaches the position where the running thread passes through the thread grip portion engraved on the measuring end of the empty bobbin ,
A revolving type winding method for synthetic fiber threads, which comprises returning the pressure of the injection fluid to the pressure at the time of winding.

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