Carbon crystal plate hot-pressing device

Abstract

The utility model belongs to the technical field of carbon crystal plate processing, and discloses a carbon crystal plate hot pressing device. Comprising a heating plate installed at the top end of a processing table, an L-shaped frame is fixedly connected to the top end of the processing table, an air cylinder is installed at the top end of the L-shaped frame, the output end of the air cylinder penetrates through the L-shaped frame, an extrusion plate is installed at the output end of the air cylinder, balance paper and a carbon crystal base material are arranged at the top end of the heating plate, and the balance paper is located below the carbon crystal base material. The heating device further comprises a pair of stretching plates, and the pair of stretching plates are connected into the heating plate in a sliding mode. According to the device, through the structural design of the driving rod, the clamping mechanism and the clamping plate, when the driving rod moves downwards, the clamping mechanism is driven to operate, the clamping mechanism operates to drive the clamping plate to move downwards to extrude the balance plate and fix the balance plate, and the situation that balance paper and a carbon crystal base material shake during hot pressing is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of carbon crystal plate processing, and more specifically, to a carbon crystal plate hot pressing device. Background Art

[0002] Carbon crystal board is a new type of environmentally friendly material. It is mainly made of wood or cotton and linen, and is processed through high temperature, high pressure and polymer chemical reaction processes. In the production process of carbon crystal board, hot pressing process is the key link to ensure product quality and stable performance.

[0003] Existing hot pressing devices are mostly composed of a heating plate, a cylinder and an extrusion plate. Their working principle is as follows: first, the temperature of the heating plate is increased. When the temperature of the heating plate rises to the specified temperature, the balancing paper is placed on the heating plate, and then the carbon crystal substrate is spread flat on the balancing paper. At this time, the cylinder is started. When the cylinder runs, it drives the extrusion plate installed at its output end to move downward. As the extrusion plate is squeezed, the extrusion plate exerts pressure on the balancing paper and the carbon crystal substrate, forcing the two to be combined together, thereby achieving the initial forming of the carbon crystal plate, thereby completing the hot pressing treatment of the carbon crystal plate.

[0004] However, when the existing hot pressing device hot presses the balancing paper and the carbon crystal substrate, if the balancing paper has wrinkles, the extrusion plate directly squeezes it, which can easily cause the balancing paper and the carbon crystal substrate to not fit tightly, thereby causing quality defects and aesthetic defects in the finished carbon crystal plate. Utility Model Content

[0005] In order to overcome the above-mentioned defects of the prior art, the present invention proposes a carbon crystal plate hot pressing device.

[0006] To achieve the above objectives, the present invention provides the following technical solutions: a carbon crystal plate hot pressing device, comprising a heating plate mounted on the top of a processing table, an L-frame fixedly connected to the top of the processing table, a cylinder mounted on the top of the L-frame, the output end of the cylinder passing through the L-frame, an extrusion plate mounted on the output end of the cylinder, a balancing paper and a carbon crystal substrate disposed on the top of the heating plate, the balancing paper being located below the carbon crystal substrate, and further comprising:

[0007] A pair of stretching plates are provided and the pair of stretching plates are respectively slidably connected to the interior of the heating plate, and the ends of the pair of stretching plates close to each other are respectively fixedly connected to multiple groups of first springs, and the ends of the multiple groups of first springs away from the stretching plates are all fixedly connected to the inner wall of the heating plate;

[0008] A pair of clamping plates are provided, and the pair of clamping plates are respectively arranged above the stretching plates. A pair of drive rods are fixedly connected to the outer side of the output end of the cylinder, and a clamping mechanism is provided between the drive rods and the stretching plates;

[0009] The inclined blocks are provided in four groups and are respectively fixed on both sides of the stretching plate. The top of the stretching plate is provided with a linkage mechanism that cooperates with the inclined blocks, and the linkage mechanism is used to move the stretching plate.

[0010] Furthermore, the clamping mechanism includes a fixed plate, a pair of limiting rods, a pair of second springs, a lifting rod, a connecting plate and a third spring. The fixed plate is arranged at the top end of the clamping plate, the pair of limiting rods are fixedly connected to the top end of the clamping plate, and the pair of limiting rods pass through the fixed plate, the pair of second springs are fixedly connected between the clamping plate and the fixed plate, the lifting rod is fixedly connected to the top end of the fixed plate, the connecting plate is fixedly connected to the top end of the processing table, and the lifting rod is slidably connected to one end of the connecting plate close to the heating plate, one end of the third spring is fixedly connected to the bottom end of the lifting rod, and the end of the third spring away from the lifting rod is fixedly connected to the top end of the processing table.

[0011] Furthermore, the linkage mechanism includes a pair of side plates, a pair of fixed square rods and a pair of L rods, one end of the pair of side plates is fixedly connected to the end of the stretching plate away from the heating plate, one end of the pair of fixed square rods is fixedly connected to the fixed plate, one end of the pair of fixed square rods away from the fixed plate is respectively slidably connected to the inside of the pair of side plates, and the pair of L rods are respectively fixed to both sides of the lifting rod.

[0012] Furthermore, a pair of L-rods are provided with rollers at one end away from the lifting rod, and the rollers are rotatably connected to the inside of the L-rods.

[0013] Furthermore, the clamping mechanism and the linkage mechanism are each provided in pair, and the pair of the clamping mechanism and the linkage mechanism are respectively provided on both sides of the heating plate.

[0014] The technical effects and advantages of the carbon crystal plate hot pressing device of the utility model are as follows:

[0015] (1) Through the structural design of the driving rod, clamping mechanism and clamping plate, when the driving rod moves downward, it will drive the clamping mechanism to operate, and the operation of the clamping mechanism will drive the clamping plate to move downward to squeeze the balance plate and fix it, thereby avoiding the shaking of the balance paper and carbon crystal substrate during hot pressing.

[0016] (2) Through the structural design of the linkage mechanism and the inclined block, the clamping mechanism drives the driving rod to squeeze the linkage mechanism. The linkage mechanism operates and squeezes the inclined block. The inclined block is forced to drive the stretching plate to move in the direction away from the heating plate. The inclined block also drives the clamping plate to move in the direction away from the heating plate through the linkage mechanism and the clamping mechanism. In conjunction with the squeezing of the stretching plate, the balance paper moves horizontally while being squeezed. The clamping plate and the stretching plate will pull the balance paper and straighten the wrinkles of the balance paper, thereby avoiding the problem that the balance paper and the carbon crystal substrate cannot fit tightly. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 This is a schematic diagram of the explosion of the balance paper and carbon crystal substrate in the present invention.

[0019] Figure 3 It is a schematic diagram of the structure of the fixing plate, the limiting rod and the second spring in the utility model.

[0020] Figure 4 This is a schematic structural diagram of the drive rod and connecting plate in the utility model.

[0021] Figure 5 For this utility model Figure 4 A is an enlarged structural diagram of FIG.

[0022] In the picture:

[0023] 1. Processing table; 2. Heating plate; 3. L-frame; 4. Cylinder; 5. Extrusion plate; 6. Tensile plate; 7. First spring; 8. Clamping plate; 9. Drive rod; 10. Inclined block; 11. Fixed plate; 12. Limit rod; 13. Second spring; 14. Lifting rod; 15. Connecting plate; 16. Third spring; 17. Side plate; 18. Fixed square rod; 19. L-rod; 20. Roller. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1 - Figure 5 As shown, a carbon crystal plate hot pressing device includes a heating plate 2 mounted on the top of a processing table 1, an L-frame 3 is fixed to the top of the processing table 1, a cylinder 4 is mounted on the top of the L-frame 3, the output end of the cylinder 4 passes through the L-frame 3, and an extrusion plate 5 is mounted on the output end of the cylinder 4. A balancing paper and a carbon crystal substrate are provided on the top of the heating plate 2, and the balancing paper is located below the carbon crystal substrate. The device also includes:

[0026] A pair of stretching plates 6 are provided, and the pair of stretching plates 6 are respectively slidably connected to the inside of the heating plate 2, and the ends of the pair of stretching plates 6 that are close to each other are respectively fixed to multiple groups of first springs 7, and the ends of the multiple groups of first springs 7 that are away from the stretching plates 6 are all fixed to the inner wall of the heating plate 2;

[0027] A pair of clamping plates 8 are provided, and the pair of clamping plates 8 are respectively arranged above the stretching plate 6. A pair of driving rods 9 are fixedly connected to the outer side of the output end of the cylinder 4, and a clamping mechanism is provided between the driving rods 9 and the stretching plate 6;

[0028] The inclined blocks 10 are provided in four groups and the four groups of inclined blocks 10 are respectively fixed on both sides of the stretching plate 6. The top of the stretching plate 6 is provided with a linkage mechanism that cooperates with the inclined blocks 10. The linkage mechanism is used to move the stretching plate 6.

[0029] When the existing hot pressing device hot presses the balancing paper and the carbon crystal substrate, if the balancing paper has wrinkles, the extrusion plate 5 directly squeezes it, which can easily cause the balancing paper and the carbon crystal substrate to not fit tightly together, thereby causing quality defects and aesthetic defects in the finished carbon crystal plate. When this embodiment is used, the heating plate 2 is raised to a specified temperature (the heating plate 2 is a conventional technology of the hot pressing device and will not be elaborated in detail in the article), and then the balancing paper is laid on the top of the heating plate 2, and the two ends of the balancing paper are placed on the surface of the stretching plate 6 respectively, and then the carbon crystal substrate is laid flat on the surface of the balancing paper, and the length of the two ends of the carbon crystal substrate has not yet reached the top of the stretching plate 6. At this time, the cylinder 4 is controlled to operate. When the cylinder 4 operates, it drives the extrusion plate 5 installed at its output end to move downward, and when the cylinder 4 moves downward, it will also drive the clamping mechanism to operate through the drive rod 9. When the clamping mechanism is in operation, it will drive the clamping plate 8 to move downward to squeeze and fix the balancing paper. Then, when the clamping plate 8 squeezes the balancing paper, the clamping mechanism will drive the drive rod 9 to squeeze the linkage mechanism. The operation then squeezes the inclined block 10, and the inclined block 10 is forced to drive the stretching plate 6 to move in the direction away from the heating plate 2. The stretching plate 6 stretches the first spring 7 at this time, so that the first spring 7 is deformed under force to generate elastic potential energy, and the inclined block 10 will also drive the clamping plate 8 to move in the direction away from the heating plate 2 through the linkage mechanism and the clamping mechanism. As the clamping plate 8 moves and cooperates with the squeezing of the stretching plate 6, the balancing paper moves horizontally while being squeezed, and the clamping plate 8 and the stretching plate 6 will pull the balancing paper, The wrinkles are straightened, thereby avoiding the problem that the balancing paper and the carbon crystal substrate cannot fit tightly. Subsequently, the extrusion plate 5 performs hot pressing on the balancing paper and the carbon crystal substrate to obtain a finished carbon crystal plate. After the cylinder 4 is reset, the cylinder 4 will drive the driving rod 9 to reset, and the driving rod 9 ends the extrusion of the clamping mechanism, and the clamping mechanism will drive the clamping plate 8 to reset, ending the extrusion of the balancing paper. When the clamping mechanism is reset, the extrusion of the linkage mechanism is also ended, and the force on the inclined block 10 ends. The first spring 7 will pull the stretching plate 6 to reset.

[0030] like Figure 2 and Figure 3As shown, the clamping mechanism includes a fixed plate 11, a pair of limiting rods 12, a pair of second springs 13, a lifting rod 14, a connecting plate 15 and a third spring 16. The fixed plate 11 is arranged at the top end of the clamping plate 8, and the pair of limiting rods 12 are fixedly connected to the top end of the clamping plate 8, and the pair of limiting rods 12 pass through the fixed plate 11. A pair of second springs 13 are fixedly connected between the clamping plate 8 and the fixed plate 11. The lifting rod 14 is fixedly connected to the top end of the fixed plate 11, and the connecting plate 15 is fixedly connected to the top of the processing table 1, and the lifting rod 14 is slidably connected to one end of the connecting plate 15 close to the heating plate 2. One end of the third spring 16 is fixedly connected to the bottom end of the lifting rod 14, and the end of the third spring 16 away from the lifting rod 14 is fixedly connected to the top of the processing table 1.

[0031] When the cylinder 4 drives the extrusion plate 5 to move downward, the cylinder 4 also drives the driving rod 9 to move downward. The downward movement of the driving rod 9 will squeeze the lifting rod 14, so that the lifting rod 14 is forced to move downward, and the lifting rod 14 will squeeze the third spring 16 in the process of moving downward, so that the third spring 16 is deformed and generates elastic potential energy. As the lifting rod 14 moves downward, the lifting rod 14 will drive the fixing plate 11 to move downward, and the downward movement of the fixing plate 11 will drive the clamping plate 8 to move downward through the second spring 13. The downward movement of the clamping plate 8 cooperates with the stretching plate 6 to The balancing paper is squeezed and fixed, and at this time the squeezing plate 5 has not yet moved downward to contact the carbon crystal substrate. The setting of the second spring 13 can provide moving space for the output end of the cylinder 4 to continue to move downward. When the output end of the cylinder 4 retracts, the output end of the cylinder 4 will drive the driving rod 9 to reset, and the driving rod 9 ends the squeezing of the lifting rod 14. The third spring 16 releases elastic potential energy to push the lifting rod 14 to reset. The lifting rod 14 resets and then drives the fixed plate 11 to reset. The reset of the fixed plate 11 will drive the clamping plate 8 through the second spring 13 to end the squeezing and fixing of the balancing paper.

[0032] like Figure 4 and Figure 5 As shown, the linkage mechanism includes a pair of side plates 17, a pair of fixed square rods 18 and a pair of L rods 19. One end of the pair of side plates 17 is fixedly connected to the end of the stretching plate 6 away from the heating plate 2, one end of the pair of fixed square rods 18 is fixedly connected to the fixed plate 11, and the ends of the pair of fixed square rods 18 away from the fixed plate 11 are respectively slidably connected to the inside of the pair of side plates 17, and the pair of L rods 19 are respectively fixed to both sides of the lifting rod 14.

[0033] When the lifting rod 14 moves downward, it drives the L rod 19 downward, and the downward movement of the L rod 19 will squeeze the inclined surface of the inclined block 10. The inclined block 10 will be subjected to force and will drive the stretching plate 6 to move. It should be noted that in the process of the movement of the stretching plate 6, the clamping plate 8 is already in a state of squeezing the balancing paper. The movement of the stretching plate 6 will drive the side plate 17 to move, and the movement of the side plate 17 will drive the fixed plate 11 to move through the fixed square rod 18, and the fixed plate 11 is still in a downward state. The fixed plate 11 will drive the fixed square rod 18 to slide inside the side plate 17. Since the clamping plate 8 and the stretching plate 6 are already in a state of squeezing the balancing paper, and the stretching plate 6 and the clamping plate 8 both move laterally, the stretching plate 6 and the clamping plate 8 will pull the balancing paper and straighten the wrinkles of the balancing paper.

[0034] like Figure 4 and Figure 5 As shown, a pair of L-rods 19 are provided with rollers 20 at one end away from the lifting rod 14 , and the rollers 20 are rotatably connected to the inside of the L-rods 19 .

[0035] The setting of the roller 20 can reduce the friction of the L rod 19 on the inclined block 10. When the L rod 19 contacts the inclined block 10, the roller 20 will first contact the inclined block 10 and rotate along the inclined surface of the inclined block 10, thereby avoiding damage caused by hard friction.

[0036] like Figure 1 As shown, the clamping mechanism and the linkage mechanism are each provided in pair, and the pair of the clamping mechanism and the linkage mechanism are respectively provided on both sides of the heating plate 2 .

[0037] A pair of clamping mechanisms and linkage mechanisms are provided to squeeze and pull both ends of the balancing paper at the same time, which has a better and more stable effect.

[0038] Working principle: When the existing hot pressing device hot presses the balancing paper and the carbon crystal substrate, if the balancing paper has wrinkles, the extrusion plate 5 directly squeezes it, which can easily cause the balancing paper and the carbon crystal substrate to not fit tightly together, thereby causing quality defects and aesthetic defects in the finished carbon crystal plate. When this embodiment is used, the heating plate 2 is raised to a specified temperature (the heating plate 2 is a conventional technology of the hot pressing device and will not be elaborated in detail in the article), and then the balancing paper is laid on the top of the heating plate 2, and the two ends of the balancing paper are placed on the surface of the stretching plate 6 respectively, and then the carbon crystal substrate is flattened on the surface of the balancing paper, and the length of the two ends of the carbon crystal substrate has not yet reached the top of the stretching plate 6. At this time, the cylinder 4 is controlled to operate. When the cylinder 4 operates, it drives the extrusion plate 5 installed at its output end to move downward, and when the cylinder 4 moves downward, it will also drive the clamping mechanism to operate through the drive rod 9. When the clamping mechanism is in operation, it will drive the clamping plate 8 to move downward to squeeze and fix the balancing paper. Then, when the clamping plate 8 squeezes the balancing paper, the clamping mechanism will drive the drive rod 9 to squeeze the linkage mechanism. The mechanism runs and squeezes the inclined block 10. The inclined block 10 is forced to drive the stretching plate 6 to move in the direction away from the heating plate 2. The stretching plate 6 stretches the first spring 7 at this time, so that the first spring 7 is deformed under force to generate elastic potential energy, and the inclined block 10 will also drive the clamping plate 8 to move in the direction away from the heating plate 2 through the linkage mechanism and the clamping mechanism. As the clamping plate 8 moves and the stretching plate 6 is squeezed, the balancing paper moves horizontally while being squeezed. The clamping plate 8 and the stretching plate 6 will pull the balancing paper, The wrinkles of the balance paper are straightened, thereby avoiding the problem that the balance paper and the carbon crystal substrate cannot be tightly fitted. Subsequently, the extrusion plate 5 performs a hot pressing process on the balance paper and the carbon crystal substrate to obtain a finished carbon crystal plate. After the cylinder 4 is reset, the cylinder 4 will drive the driving rod 9 to reset, and the driving rod 9 ends the squeezing of the clamping mechanism. The clamping mechanism will drive the clamping plate 8 to reset, ending the squeezing of the balance paper. When the clamping mechanism is reset, the squeezing of the linkage mechanism is also ended. The force on the inclined block 10 ends, and the first spring 7 will pull the stretching plate 6 to reset.

[0039] When the cylinder 4 drives the extrusion plate 5 to move downward, the cylinder 4 also drives the driving rod 9 to move downward. The downward movement of the driving rod 9 will squeeze the lifting rod 14, so that the lifting rod 14 is forced to move downward, and the lifting rod 14 will squeeze the third spring 16 in the process of moving downward, so that the third spring 16 is deformed and generates elastic potential energy. As the lifting rod 14 moves downward, the lifting rod 14 will drive the fixing plate 11 to move downward, and the downward movement of the fixing plate 11 will drive the clamping plate 8 to move downward through the second spring 13. The downward movement of the clamping plate 8 cooperates with the stretching plate 6 to The balancing paper is squeezed and fixed. At this time, the squeezing plate 5 has not yet moved downward to contact the carbon crystal substrate. The second spring 13 can provide space for the output end of the cylinder 4 to continue to move downward. When the output end of the cylinder 4 retracts, the output end of the cylinder 4 drives the driving rod 9 to reset, and the driving rod 9 stops squeezing the lifting rod 14. The third spring 16 releases elastic potential energy, pushing the lifting rod 14 to reset. The reset of the lifting rod 14 drives the fixing plate 11 to reset. The reset of the fixing plate 11 drives the clamping plate 8 through the second spring 13 to stop squeezing and fixing the balancing paper.

[0040] When the lifting rod 14 moves downward, it drives the L rod 19 downward, and the downward movement of the L rod 19 squeezes the inclined surface of the inclined block 10. The inclined block 10 is subjected to force and drives the stretching plate 6 to move. It should be noted that during the movement of the stretching plate 6, the clamping plate 8 is already in a state of squeezing the balancing paper. The movement of the stretching plate 6 drives the side plate 17 to move, and the movement of the side plate 17 drives the fixed plate 11 to move through the fixed square rod 18. The fixed plate 11 is still in a downward state, and the fixed plate 11 drives the fixed square rod 18 to slide inside the side plate 17. Since the clamping plate 8 and the stretching plate 6 are already in a state of squeezing the balancing paper, and the stretching plate 6 and the clamping plate 8 both move laterally, the stretching plate 6 and the clamping plate 8 will pull the balancing paper and straighten the wrinkles of the balancing paper.

[0041] The setting of the roller 20 can reduce the friction of the L rod 19 on the inclined block 10. When the L rod 19 contacts the inclined block 10, the roller 20 will first contact the inclined block 10 and rotate along the inclined surface of the inclined block 10, thereby avoiding damage caused by hard friction.

[0042] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A carbon crystal plate hot pressing device, comprising a heating plate (2) mounted on the top of a processing table (1), an L-frame (3) fixed to the top of the processing table (1), a cylinder (4) mounted on the top of the L-frame (3), an output end of the cylinder (4) passing through the L-frame (3), an extrusion plate (5) mounted on the output end of the cylinder (4), a balancing paper and a carbon crystal substrate are provided on the top of the heating plate (2), the balancing paper is located below the carbon crystal substrate, and is characterized in that: Also includes: A pair of stretching plates (6) are provided, and the pair of stretching plates (6) are respectively slidably connected to the interior of the heating plate (2); the ends of the pair of stretching plates (6) that are close to each other are respectively fixed to a plurality of groups of first springs (7); and the ends of the plurality of groups of first springs (7) that are away from the stretching plates (6) are all fixed to the inner wall of the heating plate (2); A pair of clamping plates (8) are provided, and the pair of clamping plates (8) are respectively arranged above the stretching plate (6); a pair of driving rods (9) are fixedly connected to the outer side of the output end of the cylinder (4); a clamping mechanism is provided between the driving rods (9) and the stretching plate (6); The inclined blocks (10) are provided in four groups and the four groups of inclined blocks (10) are respectively fixed on both sides of the stretching plate (6). The top end of the stretching plate (6) is provided with a linkage mechanism that cooperates with the inclined blocks (10), and the linkage mechanism is used to move the stretching plate (6).

2. The carbon crystal plate hot pressing device according to claim 1, characterized in that: The clamping mechanism includes a fixed plate (11), a pair of limiting rods (12), a pair of second springs (13), a lifting rod (14), a connecting plate (15) and a third spring (16), wherein the fixed plate (11) is arranged at the top end of the clamping plate (8), the pair of limiting rods (12) are fixedly connected to the top end of the clamping plate (8), and the pair of limiting rods (12) pass through the fixed plate (11), the pair of second springs (13) are fixedly connected between the clamping plate (8) and the fixed plate (11), the lifting rod (14) is fixedly connected to the top end of the fixed plate (11), the connecting plate (15) is fixedly connected to the top end of the processing table (1), and the lifting rod (14) is slidably connected to one end of the connecting plate (15) close to the heating plate (2), one end of the third spring (16) is fixedly connected to the bottom end of the lifting rod (14), and the end of the third spring (16) away from the lifting rod (14) is fixedly connected to the top end of the processing table (1).

3. The carbon crystal plate hot pressing device according to claim 2, characterized in that: The linkage mechanism comprises a pair of side plates (17), a pair of fixed square rods (18) and a pair of L rods (19), one end of the pair of side plates (17) is fixedly connected to the end of the stretching plate (6) away from the heating plate (2), one end of the pair of fixed square rods (18) is fixedly connected to the fixed plate (11), one end of the pair of fixed square rods (18) away from the fixed plate (11) is respectively slidably connected to the inside of the pair of side plates (17), and the pair of L rods (19) are respectively fixedly connected to both sides of the lifting rod (14).

4. The carbon crystal plate hot pressing device according to claim 3, characterized in that: A pair of L-rods (19) are provided with rollers (20) at one end away from the lifting rod (14), and the rollers (20) are rotatably connected to the inside of the L-rods (19).

5. The carbon crystal plate hot pressing device according to claim 4, characterized in that: A pair of the clamping mechanism and the linkage mechanism are provided, and the pair of the clamping mechanism and the linkage mechanism are respectively provided on both sides of the heating plate (2).

Images