Bamboo product special-shaped hot press and hot pressing process thereof

Abstract

The invention discloses a bamboo product special-shaped hot press and a hot pressing process thereof, and relates to the technical field of special-shaped hot presses, the bamboo product special-shaped hot press comprises a machine body and further comprises a bottom plate, a top plate and two forming plates, and the top plate, the two forming plates and the bottom plate are distributed in the machine body from top to bottom; arc-shaped forming cavities are formed in the bottom plate and the two forming plates; comprising the following steps that S1, qualified bamboo canes are taken to be cleaned, the cleaned bamboo canes are put into a high-temperature furnace to be cooked for 3 h so as to remove fungi and sugar in the bamboo canes, then the cooked bamboo canes are divided into multiple bundles according to the quantity needed by the single special-shaped bamboo product, and adhesives are evenly attached to the bundles to serve as raw materials of the bamboo product; the automatic spreading and spreading device has the advantages that bamboo product raw materials can be automatically spread and spread in the hot pressing process, meanwhile, the spreading and spreading reliability is higher, uniform distribution of the raw materials in the hot pressing process can be effectively improved, and the density uniformity of hot-pressed products is guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of special-shaped hot presses, in particular to a special-shaped hot press for bamboo products and a hot pressing process thereof. Background Art

[0002] Bamboo products are various products made of bamboo as raw material, which are widely used in daily life and craft production. When producing special-shaped bamboo products, in order to improve the uniformity of product density and strength, they will be hot-pressed to press a certain number of bamboo strips into bamboo products of corresponding shapes, such as heavy bamboo flooring.

[0003] During the use of the current hot press, the bamboo strips need to be evenly spread on the pressing plate, and then the hot pressing operation is completed by the operation of the hydraulic press and the heating treatment. However, when hot pressing special-shaped bamboo products, since the pressing plate has a certain curvature, the bamboo products thereon will gather along the curved placement surface toward the lower position, resulting in poor placement uniformity and poor density uniformity of the products after hot pressing. Therefore, it is necessary to design a special-shaped hot press machine for bamboo products and a hot pressing process thereof. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a bamboo product special-shaped hot pressing machine and a hot pressing process thereof, which solve the problems raised in the above-mentioned background technology.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A bamboo product special-shaped hot press, comprising a machine body, and also comprising:

[0007] A bottom plate, a top plate and two forming plates, wherein the top plate, the two forming plates and the bottom plate are arranged from top to bottom in the machine body, and the bottom plate and the two forming plates are provided with arc-shaped forming cavities;

[0008] Pushing rollers, the top plate and the front and rear side walls of the bottom of the two forming plates are provided with two symmetrical pushing rollers, the diameter of the pushing rollers is greater than the thickness of the bamboo product after forming, the top plate and the two forming plates are provided with a transmission assembly matched with a plurality of pushing rollers, the transmission assembly is used to make the symmetrical pushing rollers move in opposite directions to unfold the bamboo product raw materials placed in the forming cavity, and the moving trajectory of the pushing rollers is the same as the curvature of the forming cavity;

[0009] A driving assembly is used to drive the transmission assembly to operate when the bottom plate, two forming plates and the top plate are close to each other and the bamboo product raw materials are hot pressed. The top plate and the two forming plates are provided with driving assemblies. The driving assembly includes a lifting rack installed on the top plate for up and down sliding movement, and the length of the lifting rack outside the top plate is greater than the sum of the diameter of the push roller and the thickness of the bamboo product after forming.

[0010] Furthermore, sliders are fixedly installed on the side walls of the bottom plate, the forming plate and the top plate, and the multiple sliders are staggered. Multiple slide grooves are opened on the side walls of the body, and each slide groove is respectively matched with a corresponding slider. The depth of the corresponding slide grooves of the multiple sliders increases successively from top to bottom.

[0011] Furthermore, a hydraulic press is fixedly installed in the machine body, and the output end of the hydraulic press is fixedly connected to the bottom of the base plate. The upper surfaces of the base plate and the two forming plates are provided with grooves that match the corresponding pushing rollers.

[0012] Furthermore, the transmission assembly is composed of two rotating rods, two driving rods, two fixed gears, multiple belt transmission structures, multiple connecting rods, multiple arc grooves and multiple vertical rods. The two rotating rods and the two driving rods are rotatably installed in the top plate. The two fixed gears are respectively fixedly installed on the two rotating rods, and the two fixed gears are meshed with each other. Belt transmission structures are installed between the front and rear ends of the two rotating rods and the two driving rods. Vertical rods are installed on each of the belt transmission structures through connecting rods, and each vertical rod is respectively connected to the corresponding pushing roller. The front and rear side walls of the top plate are provided with arc grooves that slide with the corresponding connecting rods.

[0013] Furthermore, a rotating shaft is rotatably mounted on the vertical rod, and the rotating shaft is fixedly connected to the pushing roller.

[0014] Furthermore, the upper surface of the forming plate is provided with a lifting groove that slides up and down with the lifting rack, and a spring is installed between the lifting groove and the bottom of the lifting rack. A fixed gear ring that meshes with the lifting rack is fixedly installed on the driving rod.

[0015] Furthermore, a limiting block is fixedly mounted on the side wall of the lifting rack, and a limiting groove which is slidably matched with the limiting block up and down is opened on the side wall of the lifting slot.

[0016] Furthermore, a T-shaped block is fixedly installed on one end of the connecting rod away from the belt transmission structure, a T-shaped slot slidingly matched with the T-shaped block is opened on the side wall of the vertical rod, and a compression spring is installed between the T-shaped slot and the T-shaped block.

[0017] A bamboo product special-shaped hot pressing process, using the bamboo product special-shaped hot pressing machine as described above, comprises the following steps:

[0018] S1: Take qualified bamboo strips, clean them, and put them into a high-temperature furnace for steaming for 3 hours to remove fungi and sugars therein, then divide the steamed bamboo strips into multiple bundles according to the weight required for a single piece of special-shaped bamboo products and evenly stick adhesive on them as raw materials for bamboo products;

[0019] S2: Debug the bamboo product special-shaped hot press machine to ensure that it can work smoothly and adjust the hot pressing temperature, and then separate the top plate, forming plate and bottom plate from each other and put them in the initial position;

[0020] S3: placing each bundle of processed bamboo product raw materials in the middle of the corresponding forming cavity in sequence and making the distances between the front and rear ends of the bundle and the front and rear ends of the forming cavity substantially consistent;

[0021] S4: Start the hydraulic press to move the bottom plate upward. After the bottom plate moves upward, the lifting rack on the bottom plate contacts the bottom of the forming plate at the lower end and pushes the forming plate upward. The forming plate at the lower end then pushes the forming plate at the upper end upward. Then, the forming plate at the upper end pushes the top plate upward so that the lifting rack on the top plate contacts the top wall of the machine body.

[0022] S5: At this time, the gaps between the bottom plate, the forming plate and the top plate are constant, and the bamboo product raw materials are subjected to the upper and lower positions therein. Then, the hydraulic press is started again. At this time, the extrusion effect causes the lifting rack to overcome the elastic force of the spring and move downward, driving the corresponding driving rod to rotate counterclockwise, and then under the meshing effect of the two fixed gears, the other driving rod rotates clockwise;

[0023] S6: When the driving rod rotates, the belt transmission structure operates to make the connecting rod move along the arc groove, driving the pushing roller to move from the middle to both sides, so as to evenly spread the bamboo product raw materials. In addition, since the upper end space of the molding cavity is gradually reduced as the bottom plate, the molding plate and the top plate move upward during this process, the pushed bamboo product raw materials will not move toward the middle along the arc surface of the molding cavity again;

[0024] S7: After the bamboo product raw materials are fully unfolded, the space at the upper end of the forming cavity is at the minimum value. At this time, the pressure is maintained until the bamboo product raw materials are hot-pressed into formed special-shaped bamboo products. The hydraulic press can be retracted to separate the bottom plate, the forming plate and the top plate from each other. During this process, the lifting rack moves up and resets under the elastic force of the spring, so the push roller will also reset. After that, the staff can take out the formed special-shaped bamboo products for subsequent cutting and surface treatment.

[0025] Compared with the prior art, the present invention has the following advantages:

[0026] 1: Through the cooperation of the pushing roller, the arc groove and the connecting rod, the bamboo product raw materials in the molding cavity can be spread and flattened during the hot pressing process, thereby improving the density uniformity of the hot pressed product to a certain extent.

[0027] 2: Through the cooperation of the transmission assembly and the drive assembly, the change in the size of the upper space of the molding cavity can be used during the hot pressing process to automatically control the movement of the push roller to complete the unfolding and flattening of the bamboo product raw materials, effectively improving the degree of automation of the hot press machine.

[0028] 3: By limiting the size of the pushing roller and the lifting rack, the unfolding and flattening action of the bamboo product raw material will be carried out after the middle part of the bamboo product raw material is squeezed. Therefore, during the unfolding process, the squeezing force on the bamboo product raw material can be used to prevent it from moving toward the middle along the arc of the molding cavity again, thereby improving the reliability of the unfolding and flattening action.

[0029] In summary, the present invention can automatically complete the unfolding and flattening of bamboo product raw materials during the hot pressing process, and at the same time, the reliability of the unfolding and flattening is higher, which can effectively improve the uniform distribution of the raw materials during the hot pressing process and ensure the uniformity of the density of the product after hot pressing. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the structure of a bamboo product special-shaped hot press machine proposed by the present invention;

[0031] Figure 2 for Figure 1 Schematic diagram of the structure of the middle body;

[0032] Figure 3 for Figure 1 Schematic diagram of the structure after removing the body;

[0033] Figure 4 for Figure 3 A schematic diagram of the structure at one of the forming panels;

[0034] Figure 5 for Figure 4 Schematic diagram of the structure after removing the forming plate;

[0035] Figure 6 for Figure 4 A top view of

[0036] Figure 7 for Figure 6 Schematic diagram of the structure of the AA surface in the middle;

[0037] Figure 8 for Figure 7 A schematic diagram of the structure enlargement of part a;

[0038] Fig. 9 for Figure 5 An enlarged schematic diagram of the structure at one of the push rollers.

[0039] In the figure: 1. machine body; 2. hydraulic press; 3. bottom plate; 4. forming plate; 5. top plate; 6. forming cavity; 7. slider; 8. slide groove; 9. arc groove; 10. vertical rod; 11. pushing roller; 12. groove; 13. rotating rod; 14. driving rod; 15. belt transmission structure; 16. fixed gear; 17. connecting rod; 18. rotating shaft; 19. fixed gear ring; 20. lifting groove; 21. spring; 22. lifting rack. DETAILED DESCRIPTION

[0040] Reference Figure 1-Figure 9 A bamboo product special-shaped hot press includes a body 1, a bottom plate 3, a top plate 5 and two forming plates 4. The top plate 5, the two forming plates 4 and the bottom plate 3 are distributed from top to bottom in the body 1. The bottom plate 3 and the two forming plates 4 are provided with an arc-shaped forming cavity 6. The forming cavity 6 is used to place the bamboo product raw materials and provide corresponding space for subsequent bamboo product forming and form it into a corresponding shape, thereby completing the production of special-shaped bamboo products, such as heavy bamboo flooring.

[0041] The pushing rollers 11, the top plate 5 and the front and rear side walls at the bottom of the two forming plates 4 are all provided with two symmetrical pushing rollers 11. When the bamboo product raw materials are placed in the forming cavity 6, the raw materials are placed front and back, and the pushing rollers 11 located on the front and rear side walls are respectively matched with the front and rear end positions of the raw materials. At this time, the movement of the pushing rollers 11 can realize the unfolding and flattening of the raw materials.

[0042] Slide blocks 7 are fixedly installed on the side walls of the bottom plate 3, the forming plate 4 and the top plate 5, and the multiple slide blocks 7 are staggered. A plurality of slide grooves 8 are opened on the side walls of the body 1, and each slide groove 8 is respectively matched with the corresponding slide block 7. The depth of the slide grooves 8 corresponding to the multiple slide blocks 7 increases successively from top to bottom. The cooperation between the slide block 7 and the slide groove 8 can limit the moving direction of the bottom plate 3, the forming plate 4 and the top plate 5. At the same time, the design of the multiple slide grooves 8 with different depths limits the initial position and moving distance of the bottom plate 3, the top plate 5 and the forming plate 4 on the body 1, so that the bottom plate 3, the forming plate 4 and the top plate 5 can smoothly contact each other to realize the hot pressing treatment of the raw materials.

[0043] A hydraulic press 2 is fixedly installed in the machine body 1, and the output end of the hydraulic press 2 is fixedly connected to the bottom of the base plate 3. The hydraulic press 2 is designed to provide a driving effect for the hot pressing treatment. The upper surfaces of the base plate 3 and the two forming plates 4 are provided with grooves 12 that match the corresponding push rollers 11. The design of the grooves 12 can accommodate the push rollers 11 during the hot pressing treatment, thereby avoiding the hot pressing treatment being affected.

[0044] The machine body 1 is provided with a heating device for providing a heat source. The heating device may be an existing electric heating or steam heating device, and its working principle and specific structure are not described here.

[0045] The diameter of the push roller 11 is greater than the thickness of the bamboo product after forming. The size design here allows the push roller 11 to contact the top surface of the raw material before the raw material is completely hot-pressed and formed during the hot pressing process. Then, the movement of the push roller 11 is used to smoothly complete the unfolding and flattening of the raw material during the continuous hot pressing process to deform the raw material. The top plate 5 and the two forming plates 4 are both provided with transmission components that cooperate with the multiple push rollers 11. The transmission components are used to move the left-right symmetrical push rollers 11 in opposite directions to unfold the bamboo product raw material placed in the forming cavity 6. The moving trajectory of the push roller 11 is the same as the curvature of the forming cavity 6.

[0046] The transmission assembly is composed of two rotating rods 13, two driving rods 14, two fixed gears 16, a plurality of belt transmission structures 15, a plurality of connecting rods 17, a plurality of arc grooves 9 and a plurality of vertical rods 10. The two rotating rods 13 and the two driving rods 14 are rotatably mounted in the top plate 5. The two fixed gears 16 are respectively fixedly mounted on the two rotating rods 13, and the two fixed gears 16 are meshed with each other. The belt transmission structure 15 is installed between the front and rear ends of the two rotating rods 13 and the two driving rods 14. The vertical rod 10 is installed on each belt transmission structure 15 through the connecting rod 17. , and each vertical rod 10 is connected to the corresponding pushing roller 11 respectively, and the front and rear side walls of the top plate 5 are provided with arc grooves 9 that are slidably matched with the corresponding connecting rods 17. When the driving rod 14 rotates, the belt transmission structure 15 can drive the rotating rod 13 to rotate at the same time, and then under the meshing effect of the two fixed gears 16, the other driving rod 14 is rotated counterclockwise at the same time, and when the belt transmission structure 15 is running, it can drive the connecting rod 17 to slide in the arc groove 9, and then drive the pushing roller 11 to move through the vertical rod 10, so as to realize the unfolding processing of the raw materials;

[0047] The belt drive structure 15 is composed of a pulley 1, a pulley 2 and a belt. The pulley 1 is fixedly mounted on the rotating rod 13, the pulley 2 is fixedly mounted on the driving rod 14, the belt is installed between the pulley 1 and the pulley 2, and the connecting rod 17 is fixedly connected to the side wall of one end of the belt. The belt drive structure 15 can also adopt a chain-type chain drive structure.

[0048] A rotating shaft 18 is rotatably mounted on the vertical rod 10, and the rotating shaft 18 is fixedly connected to the pushing roller 11. Through the design of the rotating shaft 18, when the pushing roller 11 pushes the bamboo product raw materials to unfold, the contact surface between the bamboo product raw materials and the bamboo product raw materials is arc-shaped. When the bamboo product raw materials are staggered and stacked, the contact of the arc-shaped surface can make the bamboo product raw materials unfold more evenly and improve their flatness after unfolding.

[0049] A driving assembly is used to drive the transmission assembly to operate when the bottom plate 3, the two forming plates 4 and the top plate 5 are close to each other and the raw materials of bamboo products are hot-pressed. The top plate 5 and the two forming plates 4 are both provided with driving assemblies. The driving assembly includes a lifting rack 22 slidably installed on the top plate 5, and the upper surface of the forming plate 4 is provided with a lifting groove 20 that slides up and down with the lifting rack 22, and a spring 21 is installed between the lifting groove 20 and the bottom of the lifting rack 22. A fixed gear ring 19 meshing with the lifting rack 22 is fixedly installed on the driving rod 14. During the hot pressing process, taking the contact of the two forming plates 4 as an example, when the two are close to each other, the lifting rack 22 on the forming plate 4 at the lower end will press against the bottom of the forming plate 4 at the upper end, and at this time, the multiple pushing rollers 11 at the bottom of the forming plate 4 at the upper end will insert into the raw materials of bamboo products on the forming plate 4 at the lower end. The lifting rack 22 overcomes the elastic force of the spring 21 and enters the lifting slot 20, and then the meshing effect of the lifting rack 22 and the fixed gear ring 19 drives the driving rod 14 on the right to rotate counterclockwise. At this time, the driving rod 14 on the left rotates clockwise, so the pushing rollers 11 at the front and rear ends of the molding plate 4 will expand to the left and right sides to achieve the expansion and paving of the bamboo product raw materials. Since the height of the bamboo product raw materials piled on the molding cavity 6 at the beginning is greater than the thickness of the bamboo product after molding, when the pushing roller 11 expands and lays the bamboo product raw materials, the bamboo product raw materials located in the middle of the molding cavity 6 are squeezed by the two molding plates 4. Then, it can be ensured that the bamboo product raw materials will no longer be affected by the curvature of the molding cavity 6 and slide to the middle during the expansion process, which can improve the expansion and paving effect of the bamboo product raw materials.

[0050] The length of the lifting rack 22 outside the top plate 5 is greater than the sum of the diameter of the pushing roller 11 and the thickness of the bamboo product after molding. The advantage of the size design here is that it can ensure that the distance between the pushing roller 11 and the molding cavity 6 will not be less than the thickness of the bamboo product after molding during the movement of the lifting rack 22, thereby ensuring that the unfolding and flattening operation during the hot pressing process is carried out smoothly. A limit block is fixedly installed on the side wall of the lifting rack 22, and a limit groove is provided on the side wall of the lifting groove 20 to cooperate with the limit block in sliding up and down. The cooperation between the limit block and the limit groove can ensure the connection effect between the lifting rack 22 and the lifting groove 20.

[0051] A T-block is fixedly installed on one end of the connecting rod 17 away from the belt transmission structure 15, and a T-slot that slides with the T-block is opened on the side wall of the vertical rod 10, and a compression spring is installed between the T-slot and the T-block. Through the cooperation of the T-block, the T-slot and the compression spring, when the stacking height of the bamboo product raw materials is too large during the process of being unfolded and flattened, the pushing roller 11 has a certain up and down moving space, thereby reducing the moving resistance of the pushing roller 11, so that it can better complete the unfolding processing of the bamboo product raw materials.

[0052] In the present invention, a bamboo product special-shaped hot pressing process comprises the following steps:

[0053] S1: Take qualified bamboo strips, clean them, and put them into a high-temperature furnace for steaming for 3 hours to remove fungi and sugars therein, then divide the steamed bamboo strips into multiple bundles according to the weight required for a single piece of special-shaped bamboo products and evenly stick adhesive on them as raw materials for bamboo products;

[0054] S2: Debugging the bamboo product special-shaped hot press machine to ensure that it can work smoothly and regulating the hot pressing temperature, and then separating the top plate 5, the forming plate 4 and the bottom plate 3 from each other and placing them in their initial positions;

[0055] S3: placing each bundle of processed bamboo product raw materials in the middle of the corresponding forming cavity 6 in sequence and making the distance between the front and rear ends of the bundle and the front and rear ends of the forming cavity 6 substantially consistent;

[0056] S4: Start the hydraulic press 2 to move the bottom plate 3 upward. After the bottom plate 3 moves upward, the lifting rack 22 on the bottom plate 3 contacts the bottom of the forming plate 4 at the lower end and pushes the forming plate 4 upward. The forming plate 4 at the lower end then pushes the forming plate 4 at the upper end upward. Then, the forming plate 4 at the upper end pushes the top plate 5 upward so that the lifting rack 22 on the top plate 5 contacts the top wall of the machine body 1.

[0057] S5: At this time, the gaps between the bottom plate 3, the forming plate 4 and the top plate 5 are constant, and the bamboo product raw materials are subjected to the upper and lower end positions therein. Then, the hydraulic press 2 is started again. At this time, the extrusion effect causes the lifting rack 22 to overcome the elastic force of the spring 21 and move downward, driving the corresponding driving rod 14 to rotate counterclockwise, and then under the meshing effect of the two fixed gears 16, the other driving rod 14 rotates clockwise;

[0058] S6: When the driving rod 14 rotates, the belt transmission structure 15 operates to make the connecting rod 17 move along the arc groove 9, driving the pushing roller 11 to move from the middle to both sides, so as to evenly spread the bamboo product raw materials. In addition, since the space at the upper end of the molding cavity 6 is gradually reduced as the bottom plate 3, the molding plate 4 and the top plate 5 move upward during this process, the bamboo product raw materials that are pushed away will not move toward the middle along the arc surface of the molding cavity 6 again.

[0059] S7: After the bamboo product raw material is fully unfolded, the space at the upper end of the forming cavity 6 is at the minimum value. At this time, the pressure is maintained until the bamboo product raw material is hot-pressed into a formed special-shaped bamboo product. The hydraulic press 2 can be retracted to separate the bottom plate 3, the forming plate 4 and the top plate 5 from each other. During this process, the lifting rack 22 moves up and resets under the elastic force of the spring 21, so the push roller 11 will also reset. After that, the staff can take out the formed special-shaped bamboo product for subsequent cutting and surface treatment.

[0060] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, and these changes and improvements all fall within the scope of the present invention to be protected.

Claims

1. A bamboo product special-shaped hot press, comprising a machine body (1), characterized in that: Also includes: A bottom plate (3), a top plate (5) and two forming plates (4), wherein the top plate (5), the two forming plates (4) and the bottom plate (3) are arranged from top to bottom in the machine body (1), and arc-shaped forming cavities (6) are provided on the bottom plate (3) and the two forming plates (4); Push rollers (11), the top plate (5) and the front and rear side walls of the bottom of the two molding plates (4) are provided with two push rollers (11) symmetrically arranged on the left and right sides, the diameter of the push rollers (11) is greater than the thickness of the bamboo product after molding, the top plate (5) and the two molding plates (4) are provided with a transmission assembly matched with the plurality of push rollers (11), the transmission assembly is used to move the symmetrical push rollers (11) in opposite directions to unfold the bamboo product raw materials placed in the molding cavity (6), and the moving trajectory of the push rollers (11) is the same as the curvature of the molding cavity (6); A driving assembly is used to drive the transmission assembly to operate when the bottom plate (3), the two forming plates (4) and the top plate (5) are close to each other and the bamboo product raw material is hot pressed. The top plate (5) and the two forming plates (4) are both provided with a driving assembly. The driving assembly comprises a lifting rack (22) slidably mounted on the top plate (5) up and down, and the length of the lifting rack (22) outside the top plate (5) is greater than the sum of the diameter of the pushing roller (11) and the thickness of the bamboo product after forming.

2. A bamboo product special-shaped hot press according to claim 1, characterized in that: Slide blocks (7) are fixedly mounted on the side walls of the bottom plate (3), the forming plate (4) and the top plate (5), and a plurality of slide blocks (7) are arranged in a staggered manner. A plurality of slide grooves (8) are provided on the side walls of the machine body (1), and each slide groove (8) is matched with a corresponding slide block (7), and the depths of the slide grooves (8) corresponding to the plurality of slide blocks (7) increase in sequence from top to bottom.

3. A bamboo product special-shaped hot press according to claim 2, characterized in that: A hydraulic press (2) is fixedly installed in the machine body (1), and the output end of the hydraulic press (2) is fixedly connected to the bottom of the base plate (3). The upper surfaces of the base plate (3) and the two forming plates (4) are provided with grooves (12) that match the corresponding pushing rollers (11).

4. A bamboo product special-shaped hot press according to claim 3, characterized in that: The transmission assembly is composed of two rotating rods (13), two driving rods (14), two fixed gears (16), a plurality of belt transmission structures (15), a plurality of connecting rods (17), a plurality of arc grooves (9) and a plurality of vertical rods (10). The two rotating rods (13) and the two driving rods (14) are rotatably mounted in the top plate (5). The two fixed gears (16) are respectively fixedly mounted on the two rotating rods (13), and the two fixed gears (16) are meshed with each other. A belt transmission structure (15) is installed between the front and rear ends of the two rotating rods (13) and the two driving rods (14). A vertical rod (10) is installed on each of the belt transmission structures (15) through a connecting rod (17), and each vertical rod (10) is respectively connected to a corresponding pushing roller (11). The front and rear side walls of the top plate (5) are each provided with an arc groove (9) slidably matched with the corresponding connecting rod (17).

5. The bamboo product special-shaped hot press according to claim 4, characterized in that: A rotating shaft (18) is rotatably mounted on the vertical rod (10), and the rotating shaft (18) is fixedly connected to the pushing roller (11).

6. A bamboo product special-shaped hot press according to claim 5, characterized in that: The upper surface of the forming plate (4) is provided with a lifting groove (20) that is slidably matched with the lifting rack (22) up and down, and a spring (21) is installed between the lifting groove (20) and the bottom of the lifting rack (22), and a fixed gear ring (19) that meshes with the lifting rack (22) is fixedly installed on the driving rod (14).

7. A bamboo product special-shaped hot press according to claim 6, characterized in that: A limit block is fixedly mounted on the side wall of the lifting rack (22), and a limit slot is provided on the side wall of the lifting slot (20) for upward and downward sliding cooperation with the limit block.

8. The bamboo product special-shaped hot press according to claim 7, characterized in that: A T-shaped block is fixedly mounted on one end of the connecting rod (17) away from the belt transmission structure (15); a T-shaped slot slidably matched with the T-shaped block is provided on the side wall of the vertical rod (10); and a compression spring is installed between the T-shaped slot and the T-shaped block.

9. A bamboo product special-shaped hot pressing process, using the bamboo product special-shaped hot pressing machine as claimed in claim 8, characterized in that: The following steps are involved: S1: Take qualified bamboo strips, clean them, and put them into a high-temperature furnace for steaming for 3 hours to remove fungi and sugars therein, then divide the steamed bamboo strips into multiple bundles according to the weight required for a single piece of special-shaped bamboo products and evenly stick adhesive on them as raw materials for bamboo products; S2: Debugging the bamboo product special-shaped hot press machine to ensure that it can work smoothly and regulating the hot pressing temperature, and then separating the top plate (5), the forming plate (4) and the bottom plate (3) from each other and placing them in their initial positions; S3: placing each bundle of processed bamboo product raw materials in the middle of the corresponding forming cavity (6) in sequence and making the distance between the front and rear ends of the bundle be substantially the same as that between the front and rear ends of the forming cavity (6); S4: starting the hydraulic press (2) to move the bottom plate (3) upwards. After the bottom plate (3) moves upwards, the lifting rack (22) on the bottom plate (3) contacts the bottom of the forming plate (4) at the lower end and pushes the forming plate (4) upwards. The forming plate (4) at the lower end then pushes the forming plate (4) at the upper end upwards. After that, the forming plate (4) at the upper end pushes the top plate (5) upwards so that the lifting rack (22) on the top plate (5) contacts the top wall of the machine body (1). S5: At this time, the gaps between the bottom plate (3), the forming plate (4) and the top plate (5) are constant, and the bamboo product raw material is subjected to the action of the upper and lower ends. Then, the hydraulic press (2) is started again. At this time, the squeezing action causes the lifting rack (22) to overcome the elastic force of the spring (21) and move downward, driving the corresponding driving rod (14) to rotate counterclockwise, and then under the meshing effect of the two fixed gears (16), the other driving rod (14) rotates clockwise; S6: When the driving rod (14) rotates, the belt transmission structure (15) operates, so that the connecting rod (17) moves along the arc groove (9), driving the pushing roller (11) to move from the middle to both sides, so that the bamboo product raw materials are evenly spread out. In addition, since the space at the upper end of the molding cavity (6) is gradually reduced as the bottom plate (3), the molding plate (4) and the top plate (5) move upward during this process, the bamboo product raw materials that are pushed away will not move toward the middle along the arc surface of the molding cavity (6) again; S7: After the bamboo product raw material is fully unfolded, the space at the upper end of the forming cavity (6) is at its minimum value. At this time, the pressure is maintained until the bamboo product raw material is hot-pressed into a formed special-shaped bamboo product. The hydraulic press (2) can be retracted to separate the bottom plate (3), the forming plate (4) and the top plate (5) from each other. During this process, the lifting rack (22) moves upward and resets under the elastic force of the spring (21), so the push roller (11) will also reset. After that, the staff can take out the formed special-shaped bamboo product for subsequent cutting and surface treatment.

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