False twist texturing machine
By setting up an operating section and a wire detection device in the false twisting processing machine, the pin speed is reduced when cutting the wire, and the speed is reduced again after the wire disappears. This solves the problems of pin falling off and wire end blockage, and improves the reliability and efficiency of processing.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-02-08
- Publication Date
- 2026-03-17
AI Technical Summary
When cutting the yarn in a false twisting machine, the high-speed rotating pin is prone to falling off, resulting in the loss of expensive pins, and the cut yarn ends are prone to forming lumps, affecting processing efficiency.
An operating section is installed in the false twisting processing machine to reduce the speed of the pin to the cutting speed, and the thread is cut at this speed. Then, the pin deceleration is restarted after the thread is detected by the thread detection device to ensure the reliability of the pin.
It effectively reduces the number of twists in the thread during cutting, prevents the formation of thread end blocks, ensures the stability of the pin, avoids pin falling off, and improves the reliability and efficiency of processing.
Smart Images

Figure CN116685729B_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a false twisting machine having a pin-type twisting device for twisting yarn traveling inside a rotating pin. Background Technology
[0002] For example, Patent Documents 1 and 2 disclose a false-twisting machine having a pin-type twisting device for twisting threads traveling inside a rotating pin. In such a false-twisting machine, operators sometimes intentionally cut the threads when thread production is finished or when abnormalities occur during thread travel. Generally, the false-twisting machine is configured with a thread detection device called a contact, which automatically operates a cutter located on the thread path when the thread detection device detects that no thread is present. That is, if the operator removes the thread from the thread detection device, the cutter can be activated to cut the thread.
[0003] Existing technical documents
[0004] Patent documents
[0005] Patent Document 1: Japanese Patent Application Publication No. 2019-157313
[0006] Patent Document 2: Japanese Patent Application Publication No. 2019-157314 Summary of the Invention
[0007] The problem that the invention aims to solve
[0008] However, if the yarn is cut during the false twisting process in a false twisting machine, the following problems arise. The pins in false twisting rotate at high speed, thus increasing the twist count and imparting a stronger twist to the yarn. Therefore, if the yarn is cut during production, a lump is easily formed at the yarn end. Furthermore, this lump acts as resistance when passing through the pin, exerting a significant force on the pin, sometimes causing the pin to detach and be lost. Since pins are expensive, it is desirable to minimize their loss.
[0009] In view of the above problems, the object of the present invention is to suppress the situation where the pin falls off when the yarn is cut during false twisting in a false twisting machine having a pin-type twisting device.
[0010] Methods for solving problems
[0011] The present invention provides a false twisting machine having a pin-type twisting device for twisting a thread traveling inside a rotating pin, characterized in that it comprises: an operating unit capable of performing a deceleration operation to reduce the rotational speed of the pin from the production speed during thread production; and a cutter for cutting the thread, wherein after the deceleration operation is performed, the cutter cuts the thread when the rotational speed of the pin reaches a predetermined cutting speed lower than the production speed.
[0012] According to the present invention, when the operator performs a deceleration operation via the operating part, the wire is cut by the cutter after the pin decelerates to the cutting speed. Therefore, the number of twists in the wire at the time of cutting is reduced, and the formation of lumps at the end of the cut wire can be suppressed. Consequently, the end of the wire can pass smoothly through the pin, and the pin can be prevented from falling off during the cutting of the wire in false twisting processing.
[0013] In this invention, the rotational speed of the pin can be maintained at a constant cutting speed.
[0014] By maintaining the pin's rotational speed at a constant cutting speed, the thread can be cut at the target speed, thus more reliably preventing the pin from falling off.
[0015] In this invention, a thread detection device for detecting the presence or absence of the thread can be provided on the downstream side of the cutter in the direction of thread travel. After the thread is cut by the cutter, when the thread detection device detects that no thread is present, the pin starts to decelerate again from the cutting speed.
[0016] With this configuration, even if the pin's rotational speed is temporarily kept constant at the cut-off speed, the pin's deceleration can be automatically restarted, stopping the pin's rotation.
[0017] In this invention, the rotational speed of the pin can be set to be suitable for the winding speed when winding the pin-type twisting device, and the cutting speed is the same as the winding speed.
[0018] If the pin's rotation speed is too low, the number of twists in the thread decreases while the tension increases, potentially causing the thread to cut accidentally. Therefore, by setting the cutting speed to the same speed as the thread-hanging speed that prevents breakage, it is possible to avoid thread breakage before reaching the cutting speed.
[0019] In this invention, multiple processing units including the above-mentioned pin-type twisting device may be arranged, and the above-mentioned operating part may be individually provided in each of the multiple processing units.
[0020] With this configuration, the operator needs to move to the processing unit where the thread needs to be cut and operate the operating part of that processing unit. Therefore, it is possible to prevent accidental cutting of threads from other processing units.
[0021] In this invention, multiple processing units including the above-mentioned pin-type twisting device may be arranged, and the above-mentioned operating part may be shared with respect to the multiple processing units.
[0022] With this configuration, the wires of any processing unit can be cut from a single operating unit. Therefore, it saves operator time spent moving to the processing unit where the wires need to be cut. Attached Figure Description
[0023] Figure 1 This is a schematic diagram showing the configuration of the false twisting processing machine according to this embodiment.
[0024] Figure 2 This is a schematic diagram showing the structure of a pin-type twisting device.
[0025] Figure 3 From Figure 2 A diagram of the pin-type twisting device viewed from direction III.
[0026] Figure 4 This is a block diagram showing the electrical configuration of a false twisting machine.
[0027] Figure 5 This is a flowchart of the process of cutting a silk thread.
[0028] Figure 6 It is a timing diagram of the silk thread being cut. Detailed Implementation
[0029] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
[0030] (The overall structure of a false twisting processing machine)
[0031] Figure 1 This is a schematic diagram showing the configuration of the false twisting processing machine 1 according to this embodiment. The false twisting processing machine 1 is configured such that a processing unit 10 (also called a spindle) performs false twisting processing on the yarn Y. Figure 1 Multiple processing units 10 are arranged in the vertical direction (hereinafter referred to as the length direction of the machine body) of the paper. Each processing unit 10 is configured to have a feeding section 2 for supplying filament Y, a processing section 3 for performing false twisting processing on the filament Y supplied from the feeding section 2, and a winding section 4 for winding the filament Y after false twisting processing by the processing section 3 to form a package P.
[0032] The yarn feeding section 2 supplies yarn Y from the yarn feeding package Q to the processing section 3. The processing section 3 performs false twisting on the yarn Y traveling along the yarn path. In the processing section 3, starting from the upstream side in the yarn travel direction, the following are arranged sequentially along the yarn path: a first feed roller 11, a twist stop guide 12, a first heating device 13, a cooling device 14, a pin-type twisting device 15, a second feed roller 16, a winding device 17, a third feed roller 18, a second heating device 19, and a fourth feed roller 20. The winding section 4 winds the yarn Y, which has been false twisted by the processing section 3, into a package P using the winding device 21.
[0033] False twist processing machine 1 has the ability to... Figure 1The main body 5 and the winding table 6 are arranged opposite each other at intervals in the left and right directions. The main body 5 and the winding table 6 extend along the length of the machine body. The upper part of the main body 5 and the upper part of the winding table 6 are connected by a support frame 7. The processing part 3 constituting each processing unit 10 is mainly installed on the main body 5 and the support frame 7. The space surrounded by the main body 5, the winding table 6 and the support frame 7 is the working space 8. The wire Y mainly travels around the working space 8. The operator performs various operations such as wire hanging in the working space 8.
[0034] (Processing Department)
[0035] The first feed roller 11 is a roller that feeds the yarn Y supplied from the yarn supply section 2 toward the first heating device 13. The first feed roller 11 is disposed on the upper part of the winding table 6. The first feed roller 11 has a drive roller and a driven roller, and feeds the yarn Y downstream in the yarn travel direction while holding the yarn Y between the drive roller and the driven roller. The drive rollers of each processing unit 10 are connected to a common drive shaft and are driven together. The second feed roller 16, the third feed roller 18, and the fourth feed roller 20 also have the same configuration.
[0036] The anti-twist guide 12 prevents the twist applied to the yarn Y by the pin-type twisting device 15 from propagating upstream of the yarn travel direction. The anti-twist guide 12 is positioned between the first feed roller 11 and the first heating device 13 in the yarn travel direction.
[0037] The first heating device 13 is used to heat the yarn Y twisted by the pin-type twisting device 15. The first heating device 13 is installed at the upper end of the support frame 7.
[0038] The cooling device 14 is a device for cooling the yarn Y heated by the first heating device 13. The cooling device 14 is disposed between the first heating device 13 and the pin-type twisting device 15 in the yarn travel direction.
[0039] The pin-type twisting device 15 is used to twist the yarn Y. The pin-type twisting device 15 is located on the upper part of the main body 5. The pin-type twisting devices 15 of each processing unit 10 are configured to be powered by the motor 54 (see below). Figure 2 as well as Figure 4 Driven independently.
[0040] The second feed roller 16 is a roller that feeds the yarn Y twisted by the pin twisting device 15 toward the twisting device 17. The second feed roller 16 is disposed in the main body 5 below the pin twisting device 15. The feed speed of the second feed roller 16 on the yarn Y is faster than that of the first feed roller 11 on the yarn Y. Therefore, the yarn Y is stretched between the first feed roller 11 and the second feed roller 16.
[0041] The winding device 17 is a device that imparts winding by spraying air onto the yarn Y. The winding device 17 is disposed in the main body 5 below the second feed roller 16.
[0042] The third feed roller 18 is a roller that feeds the yarn Y, which has been entangled by the winding device 17, toward the second heating device 19. The third feed roller 18 is disposed in the main body 5 below the winding device 17. The feed speed of the third feed roller 18 to the yarn Y is slower than that of the second feed roller 16 to the yarn Y. Therefore, the yarn Y is slack between the second feed roller 16 and the third feed roller 18.
[0043] The second heating device 19 is a device for heating the yarn Y fed from the third feed roller 18. The second heating device 19 is disposed in the main body 5 below the third feed roller 18.
[0044] The fourth feed roller 20 is a roller that feeds the yarn Y, which has been heat-treated by the second heating device 19, toward the winding device 21. The fourth feed roller 20 is located at the lower part of the winding table 6. The feed speed of the fourth feed roller 20 to the yarn Y is slower than that of the third feed roller 18. Therefore, the yarn Y is slack between the third feed roller 18 and the fourth feed roller 20.
[0045] In the processing section 3 configured as described above, the yarn Y stretched between the first feed roller 11 and the second feed roller 16 is twisted by a pin-type twisting device 15. The twist formed by the pin-type twisting device 15 propagates to the anti-twist guide 12, but does not propagate upstream of the anti-twist guide 12 in the direction of yarn travel. The yarn Y, which is stretched and twisted in this way, is heated by the first heating device 13 and then cooled by the cooling device 14 to be heat-set. The yarn Y after passing through the pin-type twisting device 15 is untwisted before reaching the second feed roller 16. However, the twist of the yarn Y is heat-set as described above, so each filament maintains a wavy false twist state. Then, the yarn Y, which is woven by the winding device 17 and heat-set by the second heating device 19, is wound by the winding device 21.
[0046] In the processing unit 10, a cutter 23 and a thread detection device 24 are further provided on the thread channel. The cutter 23 is located upstream of the first feed roller 11 in the thread travel direction and cuts the thread Y. The thread detection device 24 is located downstream of the fourth feed roller 20 in the thread travel direction and detects the presence or absence of the thread Y. In addition, a switch 25 (the operation part of the present invention) is provided in the main body 5 corresponding to each processing unit 10. The switch 25 is used to switch the rotation state of the pin 41. In this embodiment, the switch 25 is composed of a button. However, the switch 25 may also be composed of a lever, a dial, or the like.
[0047] (Pin-type twisting device)
[0048] Figure 2 This is a schematic diagram showing the configuration of the pin-type twisting device 15. Figure 3 From Figure 2 The diagram shows the pin-type twisting device 15 viewed from direction III. The pin-type twisting device 15 twists the yarn Y traveling inside the cylindrical pin 41 by rotating it around an axis. Additionally, in... Figure 2 In the middle, the Y-shaped thread travels downwards from top to bottom. Furthermore, in... Figure 3 The diagram of guide component 52 is omitted.
[0049] The pin-type twisting device 15 has two rotating shafts 43 and 44 rotatably supported on a support member 42 via bearings (not shown). Two axially separated rollers 45 and 46 are mounted on the rotating shaft 43. Two axially separated rollers 47 and 48 are mounted on the rotating shaft 44. Rollers 45 and 47 are arranged in the same axial position, as shown... Figure 3 As shown, they are slightly separated from each other in a manner that prevents them from contacting each other. Similarly, rollers 46 and 48 are arranged in the same position in the axial direction and are slightly separated from each other in a manner that prevents them from contacting each other. The rotating shaft 43 is driven by a motor 54 to rotate about the shaft.
[0050] Pin 41 is a cylindrical component extending axially, and the wire Y travels inside pin 41. A magnetic portion 41a, opposing the magnets 49 and 50 (described later), is formed at the middle of pin 41 along its axial direction. Furthermore, a winding portion 41b extending in the diametrical direction is fixed inside one end of pin 41 along its axial direction (the end downstream of the wire's travel direction). One turn of wire Y is wound onto the winding portion 41b. With this configuration, when pin 41 rotates around its axis, wire Y is twisted.
[0051] A magnet 49 is arranged axially between rollers 45 and 46. Similarly, a magnet 50 is arranged axially between rollers 47 and 48. Magnets 49 and 50 are connected via bracket 51 (see reference). Figure 3 ) is fixed to the support member 42. When the pin 41 is inserted between the rollers 45 (46) and 47 (48) with the magnetic part 41a of the pin 41 facing the magnets 49 and 50, as Figure 3 As shown, pin 41 is held by magnets 49 and 50. Specifically, pin 41 is held by magnets 49 and 50 while it is clamped by rollers 45 (46) and 47 (48) and in contact with the circumferential surfaces of rollers 45 (46) and 47 (48). Pin 41 is not mechanically fixed relative to other components, but is held by the magnetic force generated by magnets 49 and 50 and the frictional force with the circumferential surfaces of each roller 45 to 48.
[0052] An annular guide member 52 is disposed upstream of the pin 41 in the direction of thread travel. The guide member 52 is fixed to the support member 42 via a bracket (not shown). Furthermore, a tubular guide member 53 is disposed downstream of the pin 41 in the direction of thread travel. The guide member 53 is directly fixed to the support member 42. However, the shape and fixing method of the guide members 52 and 53 are not limited to those described herein and can be appropriately modified.
[0053] like Figure 3 As indicated by the middle arrow, when the roller 45 is rotated by rotating the drive shaft 43, the pin 41, which is in contact with the circumferential surface of the roller 45, rotates passively in the opposite direction to the roller 45. Furthermore, the roller 47, which is in contact with the circumferential surface of the pin 41, rotates passively in the opposite direction to the pin 41. Thus, the pin 41 is driven to rotate about the shaft, thereby twisting the yarn Y.
[0054] (Electrical Configuration)
[0055] Figure 4 This is a block diagram showing the electrical configuration of the false twisting machine 1. Figure 4 For ease of illustration, only one processing unit 10 is shown in detail, but the other processing units 10 have the same configuration. The false twisting machine 1 has a control unit 30 that controls the operation of the multiple processing units 10. A setting unit 31 for the operator to input control programs and various settings is connected to the control unit 30. The setting unit 31 may be, for example, a touch panel or a combination of a keyboard and a monitor.
[0056] Switches 25, located in each processing unit 10, are electrically connected to the motor 54 of the pin-twisting device 15 and are used to switch the rotational state of the pins 41. If switch 25 is pressed when the pin 41 stops, the pin 41 accelerates to a specified thread-hanging speed and maintains that speed. If switch 25 is pressed while the pin 41 is rotating at the thread-hanging speed, the pin 41 accelerates to the production speed and maintains that speed. If switch 25 is pressed while the pin 41 is rotating at the production speed, the pin 41 decelerates from the production speed and stops. The thread-hanging speed is the speed at which the pin 41, suitable for thread-hanging the pins in the pin-twisting device 15, does not cause thread breakage. The production speed is the speed at which the pin 41 rotates during thread production (during false twisting). The thread-hanging speed is a speed lower than the production speed.
[0057] In this embodiment, the switch 25 is further configured such that if the switch 25 is pressed and held while the pin 41 is rotating at the production speed, the pin 41 decelerates from the production speed and remains constant at a predetermined cutting speed. That is, pressing and holding the switch 25 corresponds to the deceleration operation of the present invention. The cutting speed is low enough to suppress the blockage generated at the end of the thread Y when cut by the cutter 23 by reducing the number of twists in the thread Y. However, if the speed of the pin 41 is reduced too much, the number of twists in the thread Y becomes too small and the tension becomes too large, which may result in unwanted thread breakage. Therefore, the cutting speed is high enough to prevent thread breakage in the thread Y before reaching the cutting speed from the production speed. In this embodiment, the cutting speed is set to the same speed as the thread hanging speed. The production speed of the pin 41 and the cutting speed (thread hanging speed) can be set via the setting unit 31.
[0058] The control unit 30 is electrically connected to the motor 54, switch 25, cutter 23, and thread detection device 24 of each processing unit 10. The control unit 30 controls the operation of the motor 54 and the cutter 23 based on the rotational speed of the motor 54 (i.e., the rotational speed of the pin 41) and the detection results related to the presence or absence of thread Y detected by the thread detection device 24. Furthermore, the control unit 30 can identify the rotational state of the pin 41 of the pin-type twisting device 15 by recognizing the state of the switch 25 of each processing unit 10. The rotational state of the pin 41 can be switched not only by the switch 25 but also by the control unit 30.
[0059] (The action of cutting a thread)
[0060] The process of cutting the yarn Y in the processing unit 10 where the yarn is being produced in the false twisting machine 1 as described above is explained. Figure 5 This is a flowchart of the process of cutting a silk thread. Figure 6 It is a timing diagram of the silk thread being cut.
[0061] When the yarn Y of a certain processing unit 10 is cut, the operator moves to the processing unit 10 and presses and holds the switch 25 of the processing unit 10. If the switch 25 is pressed and held while the pin 41 of the pin twisting device 15 is rotating at the production speed ("Yes" in step S1, time T1), the deceleration of the pin 41 begins (step S2).
[0062] When the rotational speed of pin 41 decreases to the cutting speed ("Yes" in step S3, time T2), control unit 30 temporarily stops the deceleration of pin 41 and maintains the rotational speed of pin 41 at a constant cutting speed (step S4). During the period when pin 41 rotates at the cutting speed, control unit 30 operates cutter 23 to cut the wire Y (step S5, time T3). In this way, by cutting the wire Y after decelerating pin 41 to the cutting speed, the number of twists in the wire Y at the time of cutting can be reduced. As a result, the formation of lumps at the end of the cut wire Y can be suppressed, and the end of the wire Y can easily and smoothly pass through pin 41.
[0063] When the cut end of the thread Y passes through the thread detection device 24, the thread detection device 24 detects that there is no thread Y. When the control unit 30 detects that there is no thread through the thread detection device 24 ("Yes" in step S6, time T4), it restarts the deceleration of the pin 41 (step S7). Then, it finally stops the rotation of the pin 41 (time T5).
[0064] (Effect)
[0065] In this embodiment, when the operator performs a deceleration operation via switch 25 (operation unit), the wire Y is cut by cutter 23 after pin 41 decelerates to the cutting speed. Therefore, the number of twists in the wire decreases during cutting, suppressing the formation of lumps at the end of the cut wire Y. Consequently, the end of the wire Y can pass smoothly through pin 41, preventing pin 41 from falling off during false twisting processing when cutting the wire Y.
[0066] In this embodiment, the rotational speed of pin 41 is maintained at a constant cutting speed. By maintaining the rotational speed of pin 41 at a constant cutting speed, the wire Y can be cut at the target speed, thus more reliably preventing pin 41 from falling off.
[0067] In this embodiment, a thread detection device 24 is provided downstream of the cutter 23 in the thread travel direction to detect the presence or absence of thread Y. After the cutter 23 cuts the thread Y, if the thread detection device 24 detects that no thread Y is present, the pin 41 restarts its deceleration from the cutting speed. With this configuration, even if the rotational speed of the pin 41 is temporarily kept constant at the cutting speed, the deceleration of the pin 41 can be automatically restarted, stopping the rotation of the pin 41.
[0068] In this embodiment, the rotational speed of pin 41 is set to a suitable speed for thread winding when winding the pin-type twisting device 15, and the cutting speed is the same as the winding speed. If the rotational speed of pin 41 becomes too low, the number of twists in the yarn Y decreases and the tension increases, and the yarn Y may be accidentally cut. Therefore, by setting the cutting speed to be the same as the winding speed that allows thread winding without causing breakage, it is possible to avoid thread breakage before reaching the cutting speed.
[0069] In this embodiment, multiple processing units 10, each including a pin-type twisting device 15, are arranged in a row, and a switch 25 is individually provided in each of the multiple processing units 10. With this configuration, the operator needs to move to the processing unit 10 to which the thread Y is to be cut and operate the switch 25 of that processing unit 10. Therefore, it is possible to prevent accidental cutting of the thread Y in other processing units 10.
[0070] (Other implementation methods)
[0071] This section describes variations of the above-described implementation with various modifications.
[0072] In the above embodiment, pressing and holding switch 25 is equivalent to the deceleration operation of the present invention. However, the specific manner of the deceleration operation is not limited to this. For example, pressing switch 25 a predetermined number of times within a predetermined time can also be considered a deceleration operation.
[0073] In the above embodiment, when the wire Y is cut by the cutter 23, the rotational speed of the pin 41 is maintained at the cutting speed. However, it is not necessary to maintain the pin 41 at a constant cutting speed when the wire Y is cut. The wire Y can also be cut during the deceleration of the pin 41.
[0074] In the above embodiment, when the pin 41 is maintained at a constant cutting speed, if the thread detection device 24 detects that no thread Y is present, the deceleration of the pin 41 is restarted. However, the method for restarting the deceleration of the pin 41 is not limited to this. For example, the deceleration of the pin 41 can also be restarted by an operator operating the switch 25. Furthermore, the control unit 30 can restart the deceleration of the pin 41 when a predetermined time has elapsed since the pin 41 reached the cutting speed, or when a predetermined time has elapsed since the thread Y was cut. If the thread detection device 24 is not used to determine the restart of the deceleration of the pin 41, the thread detection device 24 can be omitted, but it can also be retained.
[0075] In the above embodiment, the cutting speed is set to the same speed as the wire-hanging speed. However, the cutting speed and the wire-hanging speed can also be different.
[0076] In the above embodiment, the switches 25 provided in each processing unit 10 function as the operating unit of the present invention. However, the operating unit can also be configured to be shared among multiple processing units 10. For example, the setting unit 31 can also function as a shared operating unit. In this case, the pins 41 of the processing unit 10 that is to be cut yarn Y only need to start decelerating when the setting unit 31 selects the processing unit 10 to which yarn Y is to be cut. Alternatively, when multiple processing units 10 to which yarn Y is to be cut are selected by the setting unit 31, all the pins 41 of the selected processing units 10 start decelerating. With this configuration, the yarn Y of any processing unit 10 can be cut from one setting unit 31. Therefore, the time required for the operator to move to the processing unit 10 to which the yarn Y is to be cut can be saved. In this case, the operation of selecting the processing unit 10 to which yarn Y is to be cut in the setting unit 31 is equivalent to the deceleration operation of the present invention. In addition, when yarn Y is cut in multiple processing units 10, the timing of issuing commands from the control unit 30 to each pin-type twisting device 15 can be simultaneous or different.
[0077] Explanation of symbols
[0078] 1: False twisting processing machine; 10: Processing unit; 15: Pin-type twisting device; 23: Cutter; 24: Thread detection device; 25: Switch (operating unit); 41: Pin; Y: Thread.
Claims
1. A false twist texturing machine having a pin-type twisting device that twists a yarn traveling inside a rotating pin, characterized by, Possessing: an operation section capable of performing a deceleration operation for decelerating the rotational speed of the pin from a production rotational speed at the time of yarn production; and a cutter that cuts the yarn, after the deceleration operation is performed, when the rotational speed of the pin reaches a prescribed cut-off rotational speed that is lower than the production rotational speed, the cutter cuts the yarn.
2. The false twist processor according to claim 1, characterized in that the rotational speed of the pin is maintained constant at the cut-off rotational speed.
3. The false twist processor according to claim 2, characterized in that a yarn detection device that detects the presence or absence of the yarn is provided on the downstream side of the cutter in the direction of travel of the yarn, after the yarn is cut by the cutter, when the absence of the yarn is detected by the yarn detection device, the pin resumes deceleration from the cut-off rotational speed.
4. The false twist processor according to any one of claims 1 to 3, characterized in that as the rotational speed of the pin, a threading rotational speed that is appropriate when threading the pin-type twisting device is set, the cut-off rotational speed is the same as the threading rotational speed.
5. The false twist processor according to any one of claims 1 to 4, characterized in that a plurality of processing units that include the pin-type twisting device are arranged, the operation section is provided separately for each of the plurality of processing units.
6. The false twist processor according to any one of claims 1 to 4, characterized in that a plurality of processing units that include the pin-type twisting device are arranged, the operation section is provided in common with respect to the plurality of processing units.
Citation Information
Patent Citations
False twisting machine
JP2019157313A
False twisting machine
JP2019157314A
Draw texturing machine
CN110273206A
Draw texturing machine
EP3540104A1