Biaxial stretching equipment for efficiently preheating polyphenylene sulfide

Abstract

The utility model discloses polyphenylene sulfide efficient preheating two-way stretching equipment which comprises a working table, a heating plate, a traction roller, a stretching assembly and a wind-up roller are sequentially arranged on the working table in the stretching direction, a second driving assembly is arranged on the working table, and the second driving assembly is arranged below the stretching assembly. The stretching assembly comprises a first limiting plate and a second limiting plate, a limiting rail is arranged between the first limiting plate and the second limiting plate, a plurality of first sliding blocks and second sliding blocks are arranged in the limiting rail in a sliding mode, a first rotating block and a second rotating block are rotationally arranged on one side of each first sliding block and one side of each second sliding block respectively, and the first sliding blocks are fixedly connected with the sliding plate. The other side of the sliding plate is fixedly connected with a telescopic rod, the telescopic rod is connected with a mounting plate, and the lower end of the mounting plate is connected with a second driving mechanism. According to the two-way stretching device, the limiting rails on the two sides are arranged to be gradually widened, width stretching is carried out while length stretching is carried out, and stable two-way stretching of the polyphenylene sulfide film is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of polyphenylene sulfide stretching equipment, and particularly relates to a two-way stretching equipment for efficient preheating of polyphenylene sulfide. Background Technique

[0002] During the production of the film, plastic particles are heated into a molten state by an injection extruder and extruded through an extrusion die lip to form a sheet product, and then stretched through a production line to process it into a film with a larger area and thinner thickness. However, the polyphenylene sulfide film prepared by the prior art can generally only be unidirectionally stretched. To perform bidirectional stretching, two production lines are required for processing, and if the stretching speed is not properly controlled, the film is easily broken during stretching, which cannot meet the requirements in production, processing, and application. Content of the Utility Model

[0003] Based on the above background, the purpose of the utility model is to provide a two-way stretching equipment for efficient preheating of polyphenylene sulfide.

[0004] To achieve the above purpose, the utility model adopts the following technical solutions:

[0005] A two-way stretching equipment for efficient preheating of polyphenylene sulfide, comprising a workbench, on which a heating plate, a traction roller, a stretching assembly, and a winding roller are sequentially arranged along the stretching direction.

[0006] Two heating plates are arranged in the up-down direction and are fixedly connected to the workbench. Two traction rollers are arranged in the up-down direction and are rotatably connected to the workbench. The polyphenylene sulfide film to be stretched passes through the gaps between the two heating plates and the two traction rollers. A first driving assembly is arranged on the workbench, and the first driving assembly is connected to the traction roller.

[0007] Two groups of stretching assemblies are symmetrically arranged above the workbench in the front-back direction. A second driving assembly is arranged on the workbench. The second driving assembly has two groups and is arranged below the corresponding stretching assemblies to provide driving force for the cyclic movement of the stretching assemblies.

[0008] The stretching assembly includes a first limiting plate and a second limiting plate. The second limiting plate is arranged above the first limiting plate. A limiting track is provided between the first limiting plate and the second limiting plate. The width between the limiting tracks of the two stretching assemblies gradually increases along the stretching direction. A plurality of first sliders and second sliders are slidably arranged in the limiting track. The second sliders are arranged above the corresponding first sliders. First rotating blocks and second rotating blocks are respectively rotatably arranged on one sides of the first sliders and the second sliders close to the center of the workbench. One side of the first slider is fixedly connected to a sliding plate. The second slider is slidably connected to the sliding plate. The sliding plate slides along the inner side wall of the first limiting plate. The other side of the sliding plate is fixedly connected to a telescopic rod. The other end of the telescopic rod is connected to a mounting plate. The lower end of the mounting plate is connected to a second driving mechanism;

[0009] The winding roller is rotatably arranged on the workbench, and one end of the winding roller is fixedly connected to the first motor.

[0010] Preferably, the first driving assembly includes first gears. There are two first gears which are respectively fixedly connected to the two traction rollers. The two first gears are meshed and connected. One of the first gears is fixedly connected to the second motor. The second motor is fixed on the workbench. The second motor drives the first gear connected thereto to rotate, thereby driving the other meshed first gear to rotate. The two first gears drive the traction rollers to rotate, so as to convey the polyphenylene sulfide film passing through the middle towards the stretching assembly.

[0011] Preferably, the second driving assembly includes a transmission belt. The lower end of the mounting plate is connected to the outer side surface of the transmission belt. Transmission wheels are rotatably arranged at both ends inside the transmission belt. The transmission wheels are rotatably arranged on the workbench. A third motor is fixedly arranged on the workbench. The output end of the third motor is connected to one of the transmission wheels. The third motor rotates to drive the transmission wheel to rotate, so as to realize the cyclic rotation of the stretching assembly through the connection and rotation between the transmission belt and the transmission wheels.

[0012] Preferably, a spherical seat is rotatably arranged on the mounting plate. The telescopic rod is fixedly connected to the spherical seat. Through the spherical rotational connection between the spherical seat and the mounting plate, when the mounting plate passes through a corner, the angle between the telescopic rod and the mounting plate can be adjusted in time to prevent the telescopic rod from breaking due to inability to bend, which affects the rotation of the sliding plate.

[0013] Preferably, the bottom of the first limiting plate is connected to a first connecting rod, and the top of the second limiting plate is connected to a second connecting rod. The other ends of the first connecting rod and the second connecting rod are fixedly connected to the workbench. The arrangement of the first connecting rod and the second connecting rod will not interfere with the sliding of the sliding plate.

[0014] Preferably, a third slider is fixed to the lower end of the first slider close to the first rotating block, and the third slider slides along the outer side of the first limiting plate. The third slider and the first slider are in an inverted L shape, which better facilitates the first slider to slide along the limiting track and prevents the first slider from leaving the track.

[0015] Preferably, the limiting track includes a parallel track, a stretching track, a stable track and a circulating track, the parallel track, the stretching track and the stable track are arranged in sequence along the stretching direction, and the two ends of the circulating track are respectively connected to the parallel track and the stable track;

[0016] The stretching track is used to stretch the polyphenylene sulfide film in width while stretching the film in length, the parallel track and the stable track are used to stretch the polyphenylene sulfide film in length, and the circulating track is used to cyclically send the first slider and the second slider back to the parallel track;

[0017] The cross sections of the first limiting plate and the second limiting plate are consistent with the stretching track.

[0018] Preferably, a slide groove is provided on one side of the slide plate, a spring is fixedly provided on the top of the slide groove, a fourth slide block is fixedly provided on one side of the second slide block, the fourth slide block is slidably provided in the slide groove, a fifth slide block is fixedly provided on the top of the fourth slide block, and the fifth slide block is fixedly connected to one end of the spring;

[0019] A first separation plate and a second separation plate are provided on the inner side wall of the second limiting plate, and the fifth slider can slide along the upper end surfaces of the first separation plate and the second separation plate. The first separation plate is arranged above the parallel track, and is used to push the second slider upward before clamping the polyphenylene sulfide film, so as to facilitate the side clamping of the polyphenylene sulfide film. The second separation plate is arranged above the stable track, and is used to push the second slider upward before entering the circulating track to release the clamping of the polyphenylene sulfide film.

[0020] The utility model has the following beneficial effects:

[0021] 1. The first slider and the second slider of the utility model slide in the limiting track. In the process of cyclic rotation, the first rotating block and the second rotating block clamp and fix the two sides of the polyphenylene sulfide film from the side close to the traction roller, and when the first slider and the second slider slide along the track of the limiting track, the polyphenylene sulfide film is stretched in length when moving along the direction of the winding roller. At the same time, the limiting tracks on both sides gradually widen, and the width is stretched while the length is stretched. After the width stretching is completed, the second slider slides upward along the slide plate, and the polyphenylene sulfide film loses its clamping. The polyphenylene sulfide film is wound up by the rotation of the winding roller, thereby realizing stable bidirectional stretching of the polyphenylene sulfide film and improving the stretching quality.

[0022] 2. When the present utility model is stretched, it only performs length stretching when sliding on the parallel track. When passing through the stretching track, due to the gradually inclined angle of the stretching track, while stretching the length of the polyphenylene sulfide film, the width of the polyphenylene sulfide film is stably stretched. Then, after passing through the stabilizing track, the stretched width of the polyphenylene sulfide film is stably buffered to avoid retraction. After that, it is sent to the winding roller to wind the stretched polyphenylene sulfide film, and the first rotating block and the second rotating block return to the parallel track through the circulating track to continue clamping the polyphenylene sulfide film, saving production space and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0024] Figure 1 is a three-dimensional structural schematic diagram of the present utility model;

[0025] Figure 2 is a three-dimensional structural schematic diagram of the first connecting rod and the second connecting rod of the present utility model;

[0026] Figure 3 is a three-dimensional structural schematic diagram of the second driving assembly of the present utility model;

[0027] Figure 4 is a disassembled three-dimensional structural schematic diagram of the spherical seat and the mounting plate of the present utility model;

[0028] Figure 5 is a three-dimensional structural schematic diagram of the sliding plate of the present utility model;

[0029] Figure 6 is a three-dimensional structural schematic diagram of the first limiting plate and the second limiting plate of the present utility model;

[0030] Figure 7 is a top view structural schematic diagram of the limiting track of the present utility model.

[0031] Wherein: 1. Workbench; 11. First connecting rod; 12. Second connecting rod;

[0032] 2. Heating plate;

[0033] 3. Traction roller;

[0034] 4. Stretching component; 41. First limiting plate; 42. Second limiting plate; 43. Limiting track; 44. First slider; 45. Second slider; 46. First rotating block; 47. Second rotating block; 48. Slide plate; 49. Telescopic rod; 410. Mounting plate; 411. Spherical seat; 412. Third slider; 413. First separating plate; 414. Second separating plate;

[0035] 431. Parallel track; 432. Stretching track; 433. Stable track; 434. Circular track;

[0036] 451. Fourth slider; 452. Fifth slider;

[0037] 481. Chute; 482. Spring;

[0038] 5. Rewinding roller; 51. First motor;

[0039] 6. First driving component; 61. First gear; 62. Second motor;

[0040] 7. Second driving component; 71. Transmission belt; 72. Transmission wheel; 73. Third motor. Detailed implementation manners

[0041] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0042] It should be noted that all the directional indications (such as up, down, left, right, front, back,...) in the embodiments of the present invention are only used to explain the relative position relationship and movement conditions between components in a specific posture (as shown in the drawings). If the specific posture changes, the directional indications will also change accordingly.

[0043] In addition, the descriptions such as "first" and "second" in the present invention are only for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present invention.

[0044] Such asFigure 1-7 As shown in the figure, a biaxial stretching device for efficient preheating of polyphenylene sulfide includes a workbench 1. Along the stretching direction on the workbench 1, a heating plate 2, a traction roller 3, a stretching assembly 4 and a winding roller 5 are sequentially arranged.

[0045] There are two heating plates 2 arranged in the up and down direction and fixedly connected to the workbench 1. There are two traction rollers 3 arranged in the up and down direction and rotatably connected to the workbench 1. The polyphenylene sulfide film to be stretched passes through the gaps between the two heating plates 2 and the two traction rollers 3. A first driving assembly 6 is arranged on the workbench 1, and the first driving assembly 6 is connected to the traction roller 3.

[0046] There are two groups of stretching assemblies 4, which are symmetrically arranged in the front and back above the workbench 1. A second driving assembly 7 is arranged on the workbench 1. The second driving assembly 7 has two groups and is arranged below the corresponding stretching assemblies 4 to provide driving force for the cyclic movement of the stretching assemblies 7.

[0047] The stretching assembly 4 includes a first limiting plate 41 and a second limiting plate 42. The second limiting plate 42 is arranged above the first limiting plate 41. A limiting track 43 is arranged between the first limiting plate 41 and the second limiting plate 42. The width between the limiting tracks 43 of the two groups of stretching assemblies 4 gradually increases along the stretching direction. A number of first sliders 44 and second sliders 45 are slidably arranged in the limiting track 43. The second slider 45 is arranged above the corresponding first slider 44. A first rotating block 46 and a second rotating block 47 are respectively rotatably arranged on the sides of the first slider 44 and the second slider 45 close to the center of the workbench 1. One side of the first slider 44 is fixedly connected to a sliding plate 48. The second slider 45 is slidably connected to the sliding plate 48. The sliding plate 48 slides along the inner side wall of the first limiting plate 41. The other side of the sliding plate 48 is fixedly connected to a telescopic rod 48. The other end of the telescopic rod 49 is connected to a mounting plate 410. The lower end of the mounting plate 410 is connected to the second driving mechanism 7.

[0048] The winding roller 5 is rotatably arranged on the workbench 1. One end of the winding roller 5 is fixedly connected to a first motor 51.

[0049] Before stretching, the front end of the polyphenylene sulfide film block to be stretched is passed through between two heating plates 2 and a traction roller 3. The two sides of the front end of the polyphenylene sulfide film block are clamped by the stretching assemblies 4 on both sides. When stretching, the heating plates 2 heat from the upper and lower sides. After the polyphenylene sulfide film is softened, it passes through the gap between the two rotating traction rollers 3. The second driving assembly 7 rotates according to the set speed, driving the mounting plate 410 to rotate. During the rotation, the telescopic rod 49 expands and contracts or stretches the distance between the corresponding mounting plate 410 and the sliding plate 48. The sliding plate 48 rotates following the mounting plate 410, driving the first slider 44 and the second slider 45 to slide in the limiting track 43. During the cyclic rotation, the first rotating block 46 and the second rotating block 47 clamp and fix the two sides of the polyphenylene sulfide film from the side close to the traction roller 3. When the first slider 44 and the second slider 45 slide along the track of the limiting track 43 and move along the direction of the winding roller 5, the length of the polyphenylene sulfide film is stretched. At the same time, the distance between the two limiting tracks 43 on both sides gradually widens, and width stretching is carried out while stretching the length. After the width stretching is completed, the second slider 45 slides upward along the sliding plate 48, losing the clamping of the polyphenylene sulfide film, and the winding roller 5 rotates to wind the polyphenylene sulfide film.

[0050] Preferably, the first driving assembly 6 includes a first gear 61. There are two first gears 61, which are respectively fixedly connected to the two traction rollers 3. The two first gears 61 are meshed and connected. One of the first gears 61 is fixedly connected to the second motor 62. The second motor 62 is fixed on the workbench 1. The second motor 62 drives the first gear 61 connected thereto to rotate, thereby driving the other meshed first gear 61 to rotate. The two first gears 61 drive the traction rollers 3 to rotate, thereby conveying the polyphenylene sulfide film passing through the middle toward the stretching assembly 4.

[0051] Preferably, the second driving assembly 7 includes a transmission belt 71. The lower end of the mounting plate 410 is connected to the outer side of the transmission belt 71. At both ends inside the transmission belt 71, there are rotating transmission wheels 72. The transmission wheels 72 are rotatably arranged on the workbench 1. A third motor 73 is fixedly arranged on the workbench 1. The output end of the third motor 73 is connected to one of the transmission wheels 72. The third motor 73 rotates to drive the transmission wheel 72 to rotate, thereby realizing the cyclic rotation of the stretching assembly 4 through the connection and rotation between the transmission belt 71 and the transmission wheels 72.

[0052] Preferably, a spherical seat 411 is rotatably arranged on the mounting plate 410. The telescopic rod 49 is fixedly connected to the spherical seat 411. Through the spherical rotational connection between the spherical seat 411 and the mounting plate 410, when the mounting plate 410 passes through the corner, the angle between the telescopic rod 49 and the mounting plate 410 can be adjusted in time to avoid the telescopic rod 49 being unable to bend and break, affecting the rotation of the sliding plate 48.

[0053] Preferably, a first connecting rod 11 is connected to the bottom of the first limiting plate 41, and a second connecting rod 12 is connected to the top of the second limiting plate 42. The other ends of the first connecting rod 11 and the second connecting rod 12 are fixedly connected to the workbench 1. The setting of the first connecting rod 12 and the second connecting rod 12 will not interfere with the sliding of the slide plate 48.

[0054] Preferably, a third slider 412 is fixed to the lower end of the first slider 44 near the first rotating block 46, and the third slider 412 slides along the outer side of the first limiting plate 42, wherein the side of the third slider 412 near the slide plate 48 is arc-shaped, which is convenient for reducing sliding resistance when turning a corner, and the third slider 412 and the first slider 44 are in an inverted L-shape, which better facilitates the first slider 44 to slide along the limiting track 43 and prevent the first slider 44 from leaving the track.

[0055] Preferably, the limiting track 43 includes a parallel track 431, a stretching track 432, a stable track 433 and a circulating track 434. The parallel track 431, the stretching track 432 and the stable track 433 are arranged in sequence along the stretching direction, and both ends of the circulating track 434 are connected to the parallel track 431 and the stable track 433 respectively;

[0056] The stretching track 432 is used to stretch the polyphenylene sulfide film in width while stretching the film in length. The parallel track 431 and the stabilizing track 433 are used to stretch the film in length. The circulating track 434 is used to cyclically send the first slider 44 and the second slider 45 back to the parallel track 431.

[0057] The cross-sections of the first limiting plate 41 and the second limiting plate 42 are consistent with the stretching track 432. The first rotating block 46 and the second rotating block 47 clamp the two sides of the polyphenylene sulfide film, and only stretch the length when sliding on the parallel track 431. When passing through the stretching track 432, due to the gradual inclination angle of the stretching track 432, the polyphenylene sulfide film is stably stretched in width while being stretched in length. Then, the stretched width of the polyphenylene sulfide film is stably buffered through the stabilizing track to avoid retraction, and then the winding roller 5 is sent to wind up the stretched polyphenylene sulfide film, and the first rotating block 46 and the second rotating block 47 return to the parallel track 431 via the circulating track 434 to continue clamping the polyphenylene sulfide film.

[0058] Preferably, a slide groove 481 is provided on one side of the slide plate 48, a spring 482 is fixedly provided on the top of the slide groove 481, a fourth slide block 451 is fixedly provided on one side of the second slide block 45, the fourth slide block 451 is slidably provided in the slide groove 481, a fifth slide block 452 is fixedly provided on the top of the fourth slide block 451, and the fifth slide block 452 is fixedly connected to one end of the spring 482;

[0059] On the inner side wall of the second limiting plate 42, there are a first separation plate 413 and a second separation plate 414. The fifth slider 452 can slide along the upper end surfaces of the first separation plate 413 and the second separation plate 414. The first separation plate 413 is arranged above the parallel track 431 and is used to push the second slider 45 upward before clamping the polyphenylene sulfide film, facilitating the clamping of the side of the polyphenylene sulfide film. The second separation plate 414 is arranged above the stable track 433 and is used to push upward before the second slider 45 enters the circulation track 434 to release the clamping of the polyphenylene sulfide film. When the first slider 44 and the second slider 45 pass through the circulation track 434 and enter the parallel track 431, the fifth slider 452 slides upward along the first separation plate 413, driving the second slider 45 to move upward and increasing the distance between the first slider 44 and the second slider 45. When entering the parallel track 431, the first separation plate 413 moves downward. Under the elastic force of the spring 482, the second slider 45 moves downward to clamp the polyphenylene sulfide film with the first slider 44. When entering the latter section of the stable track 433, under the action of the second separation plate 414, the fifth slider 452 drives the second slider 45 to move upward, thereby releasing the clamping of the polyphenylene sulfide film and winding the polyphenylene sulfide film to avoid stretching and tearing.

[0060] The working principle of the present utility model: Before stretching, the front end of the polyphenylene sulfide film block to be stretched passes through between the two heating plates 2 and the traction rollers 3. The two side stretching assemblies 4 clamp the two sides of the front end of the polyphenylene sulfide film block. When stretching, the heating plates 2 heat from the upper and lower sides. After the polyphenylene sulfide film is softened, it passes through the gap between the two rotating traction rollers 3. The three motors 73 rotate to drive the transmission wheels 72 to rotate. Thus, through the connection between the transmission belt 71 and the transmission wheels 72, the installation plate 410 is driven to rotate by the transmission belt. During the rotation of the telescopic rod 49, it expands and contracts or stretches the distance between the corresponding installation plate 410 and the sliding plate 48. The sliding plate 48 rotates following the installation plate 410, driving the first slider 44 and the second slider 45 to slide in the limiting track 43. The second slider 45 is controlled to move upward or downward through the first separation plate 413 and the second separation plate 414 to clamp or release the polyphenylene sulfide film. When sliding on the parallel track 431, only the length is stretched. When passing through the stretching track 432, due to the gradually inclined angle of the stretching track 432, while stretching the length of the polyphenylene sulfide film, the width is stably stretched. Then, after passing through the stable track, the stretching width of the polyphenylene sulfide film is stably buffered to avoid retraction. Then, it is sent to the winding roller 5 to wind the stretched polyphenylene sulfide film. The first rotating block 46 and the second rotating block 47 return to the parallel track 431 through the circulation track 434 and continue to clamp the polyphenylene sulfide film.

[0061] Certainly, the above description is not a limitation of the present utility model, nor is the present utility model limited to the above examples. Changes, modifications, additions or substitutions made by those skilled in the art within the scope of the essence of the present utility model should also fall within the protection scope of the present utility model.

Claims

1. A biaxial stretching device for efficient preheating of polyphenylene sulfide, characterized in that, It includes a workbench, on which a heating plate, a traction roller, a stretching assembly and a winding roller are successively arranged along the stretching direction; There are two heating plates arranged along the up-and-down direction and fixedly connected to the workbench, and there are two traction rollers arranged along the up-and-down direction and rotatably connected to the workbench; a first driving assembly is arranged on the workbench, and the first driving assembly is connected to the traction roller; There are two groups of stretching assemblies symmetrically arranged front and back above the workbench, and a second driving assembly is arranged on the workbench. The second driving assembly has two groups and is arranged below the corresponding stretching assemblies to provide driving force for the cyclic movement of the stretching assemblies; The stretching assembly includes a first limiting plate and a second limiting plate. The second limiting plate is arranged above the first limiting plate. A limiting track is arranged between the first limiting plate and the second limiting plate. The width between the limiting tracks of the two groups of stretching assemblies gradually increases along the stretching direction. A number of first sliders and second sliders are slidably arranged in the limiting track. The second slider is arranged above the corresponding first slider. A first rotating block and a second rotating block are respectively rotatably arranged on the sides of the first slider and the second slider close to the center of the workbench. One side of the first slider is fixedly connected to a sliding plate. The second slider is slidably connected to the sliding plate. The sliding plate slides along the inner side wall of the first limiting plate. The other side of the sliding plate is fixedly connected to a telescopic rod. The other end of the telescopic rod is connected to a mounting plate. The lower end of the mounting plate is connected to a second driving mechanism; The winding roller is rotatably arranged on the workbench, and one end of the winding roller is fixedly connected to a first motor.

2. The biaxial stretching device for highly efficient preheating of polyphenylene sulfide according to claim 1, wherein, The first driving assembly includes first gears. There are two first gears respectively fixedly connected to the two traction rollers. The two first gears are meshed and connected. One of the first gears is fixedly connected to a second motor, and the second motor is fixed on the workbench.

3. The biaxial stretching device for high-efficiency preheating of polyphenylene sulfide according to claim 1, characterized in that, The second driving assembly includes a transmission belt. The lower end of the mounting plate is connected to the outer side surface of the transmission belt. Transmission wheels are rotatably arranged at both ends inside the transmission belt. The transmission wheels are rotatably arranged on the workbench. A third motor is fixedly arranged on the workbench, and the output end of the third motor is connected to one of the transmission wheels.

4. The biaxial stretching device for high-efficiency preheating of polyphenylene sulfide according to claim 1, wherein, A spherical seat is rotatably arranged on the mounting plate, and the telescopic rod is fixedly connected to the spherical seat.

5. The biaxial stretching device for highly efficient preheating of polyphenylene sulfide according to claim 1, characterized in that, The bottom of the first limiting plate is connected to a first connecting rod, and the top of the second limiting plate is connected to a second connecting rod. The other ends of the first connecting rod and the second connecting rod are fixedly connected to the workbench.

6. The biaxial stretching device for high-efficiency preheating of polyphenylene sulfide according to claim 1, wherein, A third slider is fixedly arranged on the side of the first slider close to the first rotating block, and the third slider slides along the outer side surface of the first limiting plate.

7. The biaxial stretching device for high-efficiency preheating of polyphenylene sulfide according to any one of claims 1-6, characterized in that The limiting track includes a parallel track, a stretching track, a stable track and a circulating track. The parallel track, the stretching track and the stable track are sequentially arranged along the stretching direction. The two ends of the circulating track are respectively connected to the parallel track and the stable track; The stretching track is used for simultaneously stretching the width of the polyphenylene sulfide film while stretching its length. The parallel track and the stable track are used for stretching the length of the polyphenylene sulfide film. The circulating track is used for cyclically sending the first slider and the second slider back to the parallel track; The cross-sections of the first limiting plate and the second limiting plate are consistent with the stretching track.

8. The biaxial stretching device for high-efficiency preheating of polyphenylene sulfide according to claim 7, characterized in that, A chute is provided on one side of the sliding plate. A spring is fixedly provided at the top inside the chute. A fourth slider is fixedly provided on one side of the second slider. The fourth slider is slidably arranged in the chute. A fifth slider is fixedly provided at the top of the fourth slider. The fifth slider is fixedly connected to one end of the spring. A first separation plate and a second separation plate are provided on the inner side wall of the second limiting plate. The fifth slider can slide along the upper end surfaces of the first separation plate and the second separation plate. The first separation plate is arranged above the parallel track and is used to push the second slider upward before clamping the polyphenylene sulfide film, facilitating the clamping of the side surface of the polyphenylene sulfide film. The second separation plate is arranged above the stable track and is used to push the second slider upward before the second slider enters the circulation track, releasing the clamping of the polyphenylene sulfide film.

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