Multilayer fire-retardant thermal insulation gasket hot-pressing composite device

Abstract

The application discloses a multi-layer fire-retardant thermal insulation gasket hot-pressing composite device and belongs to the technical field of gasket production. The device comprises a table, the lower end surface of the table is fixedly provided with table legs, the upper end surface of the table is fixedly provided with a frame, the inner upper end surface of the frame is fixedly provided with an extension rod, and the inner two sides of the frame are both provided with a sliding groove one. The linkage mechanism driven by the extension rod is arranged, automatic clamping, synchronous hot-pressing, ring cutting, product ejection and waste edge separation integrated operation of the multi-layer fire-retardant thermal insulation gasket is realized, four groups of clamping plates automatically retract to clamp the material when the ring cutting device descends, the processing stability is ensured, the stress plate cooperates with the fixed column to trigger the unloading plate to push out the product when the ring cutting device rises, the pull rope linkage support plate is retracted to make the waste material automatically fall off, only a single power source is needed in the whole process, manual intervention is not needed, the processing precision, efficiency and automation level are obviously improved, and the device is suitable for batch production of the fire-retardant thermal insulation gasket with high consistency.

Description

Technical Field

[0001] This invention relates to the field of gasket manufacturing technology, and more specifically, to a hot-pressing composite device for multilayer flame-retardant and heat-insulating gaskets. Background Technology

[0002] The multi-layer flame-retardant and heat-insulating gasket hot-pressing composite device is a specialized equipment used to composite multi-layer functional materials (such as ceramic fiber cloth, mica paper, silicone-coated fiberglass cloth, aramid non-woven fabric, etc.) into high-performance gaskets in one step through heating and pressurization. This device is mainly used to manufacture composite gaskets with flame-retardant, high-temperature resistant, electrical insulation, and heat insulation buffer properties. They are widely used in new energy vehicle battery packs, power battery modules, motor and electronic control systems, rail transit and aerospace fields, and are used as fireproof partitions, thermal management components or structural seals.

[0003] Traditional multi-layer flame-retardant and heat-insulating gaskets are often processed in steps: first, they are hot-pressed into shape, and then transferred to trimming equipment for finishing. This process is cumbersome, with large positioning deviations, which can easily lead to inconsistent dimensions or misalignment between layers. Clamping often relies on manual pressure plates or fixed blocks, which cannot adapt to the material position and are prone to displacement during hot pressing. Finished products and waste edges need to be manually separated, which is inefficient and poses a risk of burns. Existing equipment lacks a linkage unloading mechanism, and the removal of finished products and the cleaning of waste materials require machine shutdown, affecting continuous production. Overall, the automation level is low, the precision is poor, and the safety is weak, making it difficult to meet the urgent needs of new energy, fireproof materials and other fields for high consistency, high efficiency and unmanned gasket manufacturing. Summary of the Invention

[0004] In view of the problems existing in the prior art, the purpose of this invention is to provide a multi-layer flame-retardant and heat-insulating gasket hot-pressing composite device, which can realize the circumferential hot-pressing and unloading operation of the gasket.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A multi-layer flame-retardant and heat-insulating gasket hot-pressing composite device includes a table. Table legs are fixedly installed on the lower end of the table. A frame is fixedly installed on the upper end of the table. A telescopic rod is fixedly installed on the upper inner end of the frame. Sliding grooves are formed on both sides of the inner side of the frame. A horizontal plate is slidably connected between the two sets of sliding grooves. The telescopic rod is fixedly connected to the horizontal plate. A cutting ring is fixedly installed on the lower end of the horizontal plate. A processing mechanism is provided on the lower side of the cutting ring. A groove is formed on the upper end of the table. Material is placed inside the groove. The processing mechanism includes a discharge component located on the lower side of the table. The discharge component includes a housing fixedly installed on both sides of the lower end of the table. A support plate is slidably connected to the inner side of the housing. A discharge port is formed on the upper end of the support plate.

[0007] A spring is fixedly installed between the support plate and the inner wall of the outer shell. A guide tube is provided inside the frame. One end of the guide tube is connected to the outer shell, and the other end of the guide tube is connected to the slide groove.

[0008] A pull rope is slidably connected inside the guide tube. One end of the pull rope is fixedly connected to the horizontal plate, and the other end of the pull rope extends into the interior of the outer shell and is fixedly connected to the support plate.

[0009] The processing mechanism also includes a second unloading component disposed inside the cutting ring. The second unloading component includes a pressure plate fixedly installed inside the cutting ring. An unloading plate is embedded in the lower end face of the pressure plate, and a vertical rod is fixedly installed on the upper end face of the unloading plate.

[0010] A force-bearing plate is provided on the upper side of the horizontal plate, and the upper end of the vertical rod extends to the upper side of the horizontal plate and is fixedly connected to the force-bearing plate. The vertical rod is slidably connected to the horizontal plate.

[0011] A second spring is fixedly installed between the force-bearing plate and the horizontal plate. The second spring is sleeved on the outside of the vertical rod. A fixing column is fixedly installed on the upper inner surface of the frame, and the fixing column is set corresponding to the force-bearing plate.

[0012] The processing mechanism also includes a positioning component on the upper side of the table. The positioning component includes a fixing rod fixedly installed on the outer side of the cutting ring. A fixing shaft is fixedly installed on the lower end face of the fixing rod. A sleeve is provided on the lower side of the fixing shaft. A sliding plate is slidably connected inside the sleeve. The fixing shaft extends into the inside of the sleeve and is fixedly connected to the sliding plate.

[0013] A spring three is fixedly installed between the sliding plate and the lower inner end face of the casing. A wedge one is fixedly installed on the lower end face of the casing. A wedge two is correspondingly provided on the lower side of the wedge one. A clamping plate is fixedly installed on the inner side of the wedge two.

[0014] A slider is fixedly installed on the lower end face of the wedge block two. A groove two is opened on the upper end face of the table. The slider is slidably connected to the groove two. A spring four is fixedly installed between the slider and the inner wall of the groove two. Four sets of positioning components are arranged on the four sides of the material and are arranged in a ring. A fixing ring is fixedly installed between two adjacent sets of the housing. A guide rod is fixedly installed on the upper end face of the table. The guide rod is slidably connected to the fixing ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) This solution achieves automatic clamping, synchronous hot pressing and ring cutting, finished product ejection and waste edge separation of multi-layer flame-retardant heat insulation gaskets by setting up a linkage mechanism driven by telescopic rods. The four sets of clamping plates automatically retract to hold the material when the cutting ring descends, ensuring processing stability. When the cutting ring rises, the force plate and the fixed column cooperate to trigger the unloading plate to push out the finished product. At the same time, the pull rope links the support plate to retract, causing the waste to fall automatically. The whole process only requires a single power source and no manual intervention is needed, which significantly improves the processing accuracy, efficiency and automation level. It is suitable for the mass production of flame-retardant heat insulation gaskets with high consistency requirements. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 For the present invention Figure 1 Enlarged view of point A in the middle; Figure 3 This is a cross-sectional view of the overall structure of the present invention; Figure 4 For the present invention Figure 3 Enlarged view of point B in the middle; Figure 5 For the present invention Figure 3 Enlarged diagram of point C in the middle.

[0017] Explanation of the labels in the diagram: 1. Table; 2. Table legs; 3. Frame; 4. Telescopic rod; 5. Slide 1; 6. Horizontal plate; 7. Cutting ring; 8. Groove; 9. Material; 10. Outer shell; 11. Support plate; 12. Discharge port; 13. Spring 1; 14. Guide tube; 15. Pull rope; 16. Pressure plate; 17. Vertical rod; 18. Discharge plate; 19. Force plate; 20. Fixed column; 21. Spring 2; 22. Fixed rod; 23. Fixed shaft; 24. Shell; 25. Slide plate; 26. Spring 3; 27. Wedge 1; 28. Fixed ring; 29. ​​Guide rod; 30. Wedge 2; 31. Slide 2; 32. Slider; 33. Spring 4; 34. Clamping plate. Detailed Implementation

[0018] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0019] Please see Figures 1 to 5A multi-layer flame-retardant and heat-insulating gasket hot-pressing composite device includes a table 1, table legs 2 fixedly installed on the lower end of the table 1, a frame 3 fixedly installed on the upper end of the table 1, a telescopic rod 4 fixedly installed on the upper end of the inner side of the frame 3, and sliding grooves 5 on both sides of the inner side of the frame 3. A horizontal plate 6 is slidably connected between the two sets of sliding grooves 5. The telescopic rod 4 is fixedly connected to the horizontal plate 6. A cutting ring 7 is fixedly installed on the lower end of the horizontal plate 6. A processing mechanism is provided on the lower side of the cutting ring 7. A groove 8 is provided on the upper end of the table 1. Material 9 is provided inside the groove 8. The processing mechanism includes a discharge component 1 provided on the lower side of the table 1. The discharge component 1 includes a shell 10 fixedly installed on both sides of the lower end of the table 1. A support plate 11 is slidably connected to the inner side of the shell 10. A discharge port 12 is provided on the upper end of the support plate 11.

[0020] A spring 13 is fixedly installed between the support plate 11 and the inner wall of the outer shell 10. A guide tube 14 is provided inside the frame 3. One end of the guide tube 14 is connected to the outer shell 10, and the other end of the guide tube 14 is connected to the slide groove 5.

[0021] A pull rope 15 is slidably connected inside the guide tube 14. One end of the pull rope 15 is fixedly connected to the horizontal plate 6, and the other end of the pull rope 15 extends into the interior of the outer shell 10 and is fixedly connected to the support plate 11.

[0022] The processing mechanism also includes a second unloading component located inside the cutting ring 7. The second unloading component includes a pressure plate 16 fixedly installed inside the cutting ring 7. An unloading plate 18 is embedded in the lower end face of the pressure plate 16, and a vertical rod 17 is fixedly installed on the upper end face of the unloading plate 18.

[0023] A force-bearing plate 19 is provided on the upper side of the horizontal plate 6, and the upper end of the vertical rod 17 extends to the upper side of the horizontal plate 6 and is fixedly connected to the force-bearing plate 19. The vertical rod 17 is slidably connected to the horizontal plate 6.

[0024] A second spring 21 is fixedly installed between the load-bearing plate 19 and the horizontal plate 6. The second spring 21 is sleeved on the outside of the vertical rod 17. A fixing column 20 is fixedly installed on the upper inner surface of the frame 3. The fixing column 20 is set corresponding to the load-bearing plate 19.

[0025] The processing mechanism also includes a positioning component on the upper side of the table 1. The positioning component includes a fixing rod 22 fixedly installed on the outer side of the cutting ring 7. A fixing shaft 23 is fixedly installed on the lower end face of the fixing rod 22. A sleeve 24 is provided on the lower side of the fixing shaft 23. A sliding plate 25 is slidably connected inside the sleeve 24. The fixing shaft 23 extends into the inside of the sleeve 24 and is fixedly connected to the sliding plate 25.

[0026] A spring 26 is fixedly installed between the inner lower end face of the slide plate 25 and the housing 24. A wedge 27 is fixedly installed on the lower end face of the housing 24. A wedge 30 is correspondingly provided on the lower side of the wedge 27. A clamping plate 34 is fixedly installed on the inner side of the wedge 30.

[0027] A slider 32 is fixedly installed on the lower end face of the wedge 30. A groove 31 is opened on the upper end face of the table 1. The slider 32 is slidably connected to the groove 31. A spring 33 is fixedly installed between the slider 32 and the inner wall of the groove 31. Four sets of positioning components are arranged on the four sides of the material 9 and are arranged in a ring. A fixing ring 28 is fixedly installed between two adjacent sets of housings 24. A guide rod 29 is fixedly installed on the upper end face of the table 1. The guide rod 29 is slidably connected to the fixing ring 28.

[0028] First, place the multi-layer gasket material 9 to be processed onto the support plate 11 in the groove 8 of the table 1. Activate the telescopic rod 4 to drive the horizontal plate 6 and the cutting ring 7 fixed to it to descend synchronously.

[0029] During the descent, the cutting ring 7 drives the fixed shaft 23 to move downward through the outer fixed rod 22, which in turn pushes the slide plate 25 inside the housing 24 to compress the spring 3 26, causing the wedge block 1 27 to descend synchronously. The wedge block 1 27 cooperates with the inclined surface of the wedge block 2 30, pushing the wedge block 2 30 to slide inward along the slide groove 2 31, overcoming the resistance of the spring 4 33, and driving the clamping plate 34 to move closer to the center. The four sets of clamping plates 34 distributed in a ring simultaneously clamp the four sides of the material 9, completing automatic positioning and clamping fixation, and preventing the material 9 from shifting during the hot pressing process.

[0030] Subsequently, the cutting ring 7 continues to descend, performing a ring-shaped cut on the outer edge of the material 9; at the same time, the pressure plate 16 inside the cutting ring 7 presses down synchronously, applying hot pressure to the central area of ​​the material 9, realizing the integrated operation of hot pressing composite and edge trimming. The lower end face of both the pressure plate 16 and the unloading plate 18 is equipped with heating elements.

[0031] Traditional multi-layer flame-retardant and heat-insulating gaskets are often manufactured in a step-by-step manner: first, they are hot-pressed into shape, and then transferred to a trimming device for finishing. This process is cumbersome, prone to large positioning deviations, and easily leads to inconsistent dimensions or misalignment between layers. Clamping often relies on manual pressure plates or fixed blocks, which cannot adapt to the material position and are prone to displacement during hot pressing. Finished products and waste edges need to be manually separated, which is inefficient and poses a risk of burns. Existing equipment lacks a linkage unloading mechanism, requiring machine shutdown for finished product removal and waste cleaning, affecting continuous production. Overall, the automation level is low, the precision is poor, and the safety is weak, making it difficult to meet the urgent needs of new energy, fireproof materials and other fields for high-consistency, high-efficiency, and unmanned gasket manufacturing. To meet the demand, this solution uses a linkage mechanism driven by telescopic rod 4 to achieve automatic clamping, synchronous hot pressing and ring cutting, finished product ejection, and waste edge separation of multi-layer flame-retardant and heat-insulating gaskets. When the cutting ring 7 descends, the four sets of clamping plates 34 automatically retract to clamp the material 9, ensuring processing stability. When the cutting ring 7 rises, the force plate 19 and the fixed column 20 cooperate to trigger the unloading plate 18 to push out the finished product. At the same time, the pull rope 15 links the support plate 11 to retract, causing the waste material to fall off automatically. The entire process requires only a single power source and no manual intervention, significantly improving processing accuracy, efficiency, and automation level. It is suitable for mass production of flame-retardant and heat-insulating gaskets with high consistency requirements.

[0032] After the hot pressing and cutting ring 7 is completed, the telescopic rod 4 retracts, causing the horizontal plate 6 and the cutting ring 7 to rise. At this time, the finished gasket is limited by the unloading plate 18 below the pressure plate 16 and moves up with the cutting ring 7; while the outer waste edge is blocked by the clamping plate 34 and remains in its original position.

[0033] When the horizontal plate 6 rises to the point where the supporting plate 19 above it contacts the fixed column 20 at the top of the frame 3, it continues to rise and compresses the second spring 21. The vertical rod 17 drives the unloading plate 18 to move downward relative to the cutting ring 7, pushing the finished product pad out of the cutting ring 7 and allowing it to fall freely. It is then discharged through the unloading port 12 on the support plate 11, completing the automatic unloading of the finished product.

[0034] At the same time, as the horizontal plate 6 rises, the pull rope 15 is pulled upwards, and its other end pulls the support plate 11 to overcome the resistance of the spring 13 and retract into the outer shell 10, causing the waste edge to lose support and fall out of the groove 8, thus realizing the automatic removal of waste.

[0035] At the end of the ascent, the casing 24 rises with the cutting ring 7, the first wedge 27 disengages from the second wedge 30, the fourth spring 33 resets, and pushes the second wedge 30 and the clamping plate 34 to retract outward, releasing the limit on the waste edge and preparing for the next operation.

[0036] When the horizontal plate 6 descends again, the pull rope 15 loosens, and the spring 13 pushes the support plate 11 to extend back into the groove 8, restoring the initial support state.

[0037] How to use: This solution relates to a multi-layer flame-retardant and heat-insulating gasket hot-pressing composite device, used for simultaneously hot-pressing and circumferentially cutting the outer edge of gasket blanks composed of multiple layers of flame-retardant and heat-insulating materials, and realizing automatic unloading of finished products and automatic separation of waste edges. Its core lies in the integration of positioning clamping, hot-pressing ring cutting, dual-stage unloading, and linkage reset functions, improving processing accuracy and automation level.

[0038] The specific usage process is as follows: First, place the multi-layer gasket material 9 to be processed onto the support plate 11 in the groove 8 of the table 1. Activate the telescopic rod 4 to drive the horizontal plate 6 and the cutting ring 7 fixed to it to descend synchronously.

[0039] During the descent, the cutting ring 7 drives the fixed shaft 23 to move downward through the outer fixed rod 22, which in turn pushes the slide plate 25 inside the housing 24 to compress the spring 3 26, causing the wedge block 1 27 to descend synchronously. The wedge block 1 27 cooperates with the inclined surface of the wedge block 2 30, pushing the wedge block 2 30 to slide inward along the slide groove 2 31, overcoming the resistance of the spring 4 33, and driving the clamping plate 34 to move closer to the center. The four sets of clamping plates 34 distributed in a ring simultaneously clamp the four sides of the material 9, completing automatic positioning and clamping fixation, and preventing the material 9 from shifting during the hot pressing process.

[0040] Subsequently, the cutting ring 7 continues to descend, performing a ring-shaped cut on the outer edge of the material 9; at the same time, the pressure plate 16 inside the cutting ring 7 presses down synchronously, applying hot pressure to the central area of ​​the material 9, realizing the integrated operation of hot pressing composite and edge trimming. The lower end face of both the pressure plate 16 and the unloading plate 18 is equipped with heating elements.

[0041] After the hot pressing and cutting ring 7 is completed, the telescopic rod 4 retracts, causing the horizontal plate 6 and the cutting ring 7 to rise. At this time, the finished gasket is limited by the unloading plate 18 below the pressure plate 16 and moves up with the cutting ring 7; while the outer waste edge is blocked by the clamping plate 34 and remains in its original position.

[0042] When the horizontal plate 6 rises to the point where the supporting plate 19 above it contacts the fixed column 20 at the top of the frame 3, it continues to rise and compresses the second spring 21. The vertical rod 17 drives the unloading plate 18 to move downward relative to the cutting ring 7, pushing the finished product pad out of the cutting ring 7 and allowing it to fall freely. It is then discharged through the unloading port 12 on the support plate 11, completing the automatic unloading of the finished product.

[0043] At the same time, as the horizontal plate 6 rises, the pull rope 15 is pulled upwards, and its other end pulls the support plate 11 to overcome the resistance of the spring 13 and retract into the outer shell 10, causing the waste edge to lose support and fall out of the groove 8, thus realizing the automatic removal of waste.

[0044] At the end of the ascent, the casing 24 rises with the cutting ring 7, the first wedge 27 disengages from the second wedge 30, the fourth spring 33 resets, and pushes the second wedge 30 and the clamping plate 34 to retract outward, releasing the limit on the waste edge and preparing for the next operation.

[0045] When the horizontal plate 6 descends again, the pull rope 15 loosens, and the spring 13 pushes the support plate 11 to extend back into the groove 8, restoring the initial support state.

[0046] In summary, this device, through mechanical linkage and elastic reset mechanism, can complete the entire process of automatic clamping → hot pressing and ring cutting 7 → finished product ejection → waste separation → mechanism reset using only a single power source of telescopic rod 4, without manual intervention. It significantly improves the processing efficiency, dimensional consistency and production safety of multi-layer flame-retardant and heat-insulating gaskets, and is suitable for the manufacturing of precision gaskets in fields such as new energy battery packs, fireproof sealing, and high-temperature protection.

[0047] The above description is merely a preferred embodiment of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concepts, should be covered within the scope of protection of the present invention.

Claims

1. A multi-layer flame-retardant and heat-insulating gasket hot-pressing composite device, comprising a table (1), wherein table legs (2) are fixedly installed on the lower end surface of the table (1), characterized in that: A frame (3) is fixedly installed on the upper surface of the table (1). A telescopic rod (4) is fixedly installed on the upper surface inside the frame (3). A sliding groove (5) is opened on both sides inside the frame (3). A horizontal plate (6) is slidably connected between the two sets of sliding grooves (5). The telescopic rod (4) is fixedly connected to the horizontal plate (6). A cutting ring (7) is fixedly installed on the lower surface of the horizontal plate (6). A processing mechanism is provided on the lower side of the cutting ring (7). A groove (8) is opened on the upper surface of the table (1). Material (9) is provided inside the groove (8). The processing mechanism includes a material unloading component set on the lower side of the table (1). The material unloading component includes a shell (10) fixedly installed on both sides of the lower surface of the table (1). A support plate (11) is slidably connected on the inner side of the shell (10). A material unloading port (12) is opened on the upper surface of the support plate (11).

2. The multilayer flame-retardant and heat-insulating gasket hot-pressing composite device according to claim 1, characterized in that: A spring (13) is fixedly installed between the support plate (11) and the inner wall of the outer shell (10). A guide tube (14) is provided inside the frame (3). One end of the guide tube (14) is connected to the outer shell (10), and the other end of the guide tube (14) is connected to the slide groove (5).

3. The multilayer flame-retardant and heat-insulating gasket hot-pressing composite device according to claim 2, characterized in that: The guide tube (14) is slidably connected to a pull rope (15). One end of the pull rope (15) is fixedly connected to the horizontal plate (6), and the other end of the pull rope (15) extends into the interior of the outer shell (10) and is fixedly connected to the support plate (11).

4. The multilayer flame-retardant and heat-insulating gasket hot-pressing composite device according to claim 3, characterized in that: The processing mechanism also includes a second unloading component set inside the cutting ring (7). The second unloading component includes a pressure plate (16) fixedly installed inside the cutting ring (7). The lower end face of the pressure plate (16) is embedded with an unloading plate (18), and the upper end face of the unloading plate (18) is fixedly installed with a vertical rod (17).

5. The multilayer flame-retardant and heat-insulating gasket hot-pressing composite device according to claim 4, characterized in that: A force-bearing plate (19) is provided on the upper side of the horizontal plate (6), and the upper end of the vertical rod (17) extends to the upper side of the horizontal plate (6) and is fixedly connected to the force-bearing plate (19). The vertical rod (17) is slidably connected to the horizontal plate (6).

6. The multilayer flame-retardant and heat-insulating gasket hot-pressing composite device according to claim 5, characterized in that: A second spring (21) is fixedly installed between the force plate (19) and the horizontal plate (6). The second spring (21) is sleeved on the outside of the vertical rod (17). A fixing column (20) is fixedly installed on the upper inner surface of the frame (3). The fixing column (20) is set corresponding to the force plate (19).

7. The multilayer flame-retardant and heat-insulating gasket hot-pressing composite device according to claim 6, characterized in that: The processing mechanism also includes a positioning component provided on the upper side of the table (1). The positioning component includes a fixing rod (22) fixedly installed on the outer side of the cutting ring (7). A fixing shaft (23) is fixedly installed on the lower end face of the fixing rod (22). A sleeve (24) is provided on the lower side of the fixing shaft (23). A sliding plate (25) is slidably connected inside the sleeve (24). The fixing shaft (23) extends into the inside of the sleeve (24) and is fixedly connected to the sliding plate (25).

8. The multilayer flame-retardant and heat-insulating gasket hot-pressing composite device according to claim 7, characterized in that: A spring three (26) is fixedly installed between the inner lower end face of the slide plate (25) and the shell (24). A wedge one (27) is fixedly installed on the lower end face of the shell (24). A wedge two (30) is correspondingly provided on the lower side of the wedge one (27). A clamping plate (34) is fixedly installed on the inner side of the wedge two (30).

9. The multilayer flame-retardant and heat-insulating gasket hot-pressing composite device according to claim 8, characterized in that: A slider (32) is fixedly installed on the lower end face of the wedge block (30), and a groove (31) is opened on the upper end face of the table (1). The slider (32) is slidably connected to the groove (31). A spring (33) is fixedly installed between the slider (32) and the inner wall of the groove (31). The positioning component is arranged in four groups on the four sides of the material (9) and is arranged in a ring. A fixing ring (28) is fixedly installed between two adjacent sets of the shell (24). A guide rod (29) is fixedly installed on the upper end face of the table (1). The guide rod (29) is slidably connected to the fixing ring (28).

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