A hot press for irregularly shaped bamboo products and its hot pressing process

Abstract

This invention discloses a hot press machine for irregularly shaped bamboo products and its hot pressing process, relating to the technical field of irregularly shaped hot press machines. The invention includes a machine body, and further includes a bottom plate, a top plate, and two forming plates. The top plate, the two forming plates, and the bottom plate are distributed from top to bottom within the machine body. Each of the bottom plate and the two forming plates is provided with an arc-shaped forming cavity. The invention includes the following steps: S1: Qualified bamboo strips are taken and cleaned, and the cleaned bamboo strips are placed in a high-temperature furnace and steamed for 3 hours to remove fungi and sugars. Then, the steamed bamboo strips are divided into multiple bundles according to the required quantity for a single irregularly shaped bamboo product and evenly coated with adhesive as raw material for the bamboo product. The advantages are: This invention can automatically complete the unfolding and flattening process of the bamboo product raw material during hot pressing, and the reliability of unfolding and flattening is higher, effectively improving the uniform distribution of the raw material during hot pressing and ensuring the density uniformity of the product after hot pressing.

Description

Technical Field

[0001] This invention relates to the field of irregular-shaped hot press technology, and in particular to an irregular-shaped hot press for bamboo products and its hot pressing process. Background Technology

[0002] Bamboo products are various products made from bamboo as raw material. They are widely used in daily life and crafts. When producing irregularly shaped bamboo products, in order to improve the uniformity of product density and strength, they are subjected to hot pressing treatment, pressing a certain number of bamboo strips into bamboo products of the corresponding shape, such as reconstituted bamboo flooring.

[0003] In the current hot press process, bamboo strips need to be evenly laid 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 irregularly shaped bamboo products, due to the certain curvature of the pressing plate, the bamboo products on it will gather along the curved placement direction to the lower position, resulting in poor placement uniformity and poor density uniformity of the hot-pressed product. Therefore, it is necessary to design a hot press for irregularly shaped bamboo products and its hot pressing process. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this invention provides a hot press machine for irregularly shaped bamboo products and its hot pressing process, thus solving the problems mentioned in the background section.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A hot press for irregularly shaped bamboo products, comprising a machine body, and further comprising:

[0007] The machine includes a bottom plate, a top plate, and two forming plates, which are distributed from top to bottom within the machine body. Each of the bottom plate and the two forming plates is provided with an arc-shaped forming cavity.

[0008] The top plate and the two forming plates are provided with two pairs of symmetrical pushing rollers on the front and rear side walls of the bottom. The diameter of the pushing rollers is larger than the thickness of the bamboo product after forming. The top plate and the two forming plates are provided with transmission components that cooperate with the multiple pushing rollers. The transmission components are used to make the symmetrical pushing rollers move in opposite directions to unfold the bamboo product raw material placed in the forming cavity. The movement trajectory of the pushing rollers is the same as the curvature of the forming cavity.

[0009] A drive assembly is used to drive the transmission assembly when the bottom plate, two forming plates and the top plate are close to each other and the bamboo product raw material is hot-pressed. The top plate and the two forming plates are each equipped with a drive assembly. The drive assembly includes a lifting rack that is slidably mounted on the top plate, and the length of the lifting rack outside the top plate is greater than the sum of the diameter of the pushing roller and the thickness of the bamboo product after forming.

[0010] Furthermore, sliders are fixedly installed on the side walls of the base plate, the forming plate, and the top plate, and multiple sliders are arranged in an alternating manner. Multiple grooves are opened on the side walls of the machine body, and each groove cooperates with the corresponding slider. The depth of the grooves corresponding to the multiple sliders increases sequentially from top to bottom.

[0011] Furthermore, a hydraulic press is fixedly installed inside 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 cooperate with the corresponding push rollers.

[0012] Furthermore, the transmission assembly consists of two rotating rods, two driving rods, two fixed gears, multiple belt drive structures, multiple connecting rods, multiple arc-shaped grooves, and multiple vertical rods. The two rotating rods and two driving rods are rotatably mounted inside the top plate. The two fixed gears are respectively fixedly mounted on the two rotating rods and mesh with each other. Belt drive structures are installed between the front and rear ends of the two rotating rods and the two driving rods. Each belt drive structure is equipped with a vertical rod through a connecting rod, and each vertical rod is connected to a corresponding pushing roller. Arc-shaped grooves that slide with the corresponding connecting rods are opened on the front and rear side walls of the top plate.

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

[0014] Furthermore, the upper surface of the top 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 drive rod.

[0015] Furthermore, a limiting block is fixedly installed on the side wall of the lifting rack, and a limiting groove is provided on the side wall of the lifting groove to slide up and down with the limiting block.

[0016] Furthermore, a T-shaped block is fixedly installed at the end of the connecting rod away from the belt drive structure, and a T-shaped groove is opened on the side wall of the vertical rod to slide with the T-shaped block, and a compression spring is installed between the T-shaped groove and the T-shaped block.

[0017] A hot-pressing process for irregularly shaped bamboo products, using the hot-pressing machine for irregularly shaped bamboo products as described above, includes the following steps:

[0018] S1: Take qualified bamboo strips and clean them. Then put the cleaned bamboo strips into a high-temperature oven and steam them for 3 hours to remove fungi and sugar. After that, divide the steamed bamboo strips into multiple bundles according to the amount of bamboo strips required for a single piece of irregular bamboo product and evenly stick them with adhesive as raw materials for bamboo products.

[0019] S2: Adjust the bamboo product hot press to ensure it can work smoothly and control the hot pressing temperature. Then separate the top plate, forming plate and bottom plate and put them in the initial position.

[0020] S3: Place each bundle of processed bamboo product raw material in the middle of the corresponding molding cavity in sequence, and make sure that the distance between its front and rear ends is consistent with the distance between the front and rear ends of the molding cavity.

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

[0022] S5: At this time, the gap between the bottom plate, the forming plate and the top plate is constant, and the bamboo product raw material is affected by the positions of the upper and lower ends. Then the hydraulic press is started again. At this time, the squeezing action causes the lifting rack to overcome the elastic force of the spring and move downward, driving the corresponding drive rod to rotate counterclockwise. Then, under the meshing effect of the two fixed gears, the other drive rod rotates clockwise.

[0023] S6: When the drive rod rotates, the operation of the belt drive structure causes the connecting rod to move along the arc groove, which drives the push roller to move from the middle to both sides, spreading the bamboo product raw material evenly. As the space at the top of the forming cavity gradually decreases as the bottom plate, forming plate and top plate move upward, the bamboo product raw material that has been pushed away will not move back to the middle along the arc surface of the forming cavity.

[0024] S7: After the bamboo product raw material is fully expanded, the space at the top of the forming cavity is at its minimum. At this time, the pressure is maintained until the bamboo product raw material is hot-pressed into a shaped bamboo product. Then the hydraulic press can be contracted to separate the bottom plate, forming plate and top plate from each other. During this process, the lifting rack moves up and resets under the elastic force of the spring, so the pushing roller will also reset. After that, the workers can take out the shaped bamboo product for subsequent cutting and surface treatment.

[0025] Compared with existing technologies, the advantages of this invention are:

[0026] 1: By pushing the roller, the arc groove and the connecting rod together, the bamboo raw material in the forming cavity can be spread out and flattened during the hot pressing process, which can improve the density uniformity of the product after hot pressing to a certain extent.

[0027] 2: By cooperating with the transmission component and the drive component, the movement of the push roller can be automatically controlled during the hot pressing process by utilizing the change in the size of the upper space of the forming cavity to complete the unfolding and flattening of the bamboo product raw material, effectively improving the automation level of the hot press.

[0028] 3: By limiting the dimensions of the pushing roller and the lifting rack, the unfolding and flattening action of the bamboo product raw material is carried out after the bamboo product raw material is squeezed in the middle. Thus, the squeezing force on the bamboo product raw material during the unfolding process can be used to prevent it from moving back to the middle along the arc of the forming cavity, 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, while the unfolding and flattening reliability is higher, which can effectively improve the uniform distribution of raw materials during the hot pressing process and ensure the density uniformity of the product after hot pressing. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the structure of a hot press for irregularly shaped bamboo products proposed in this invention;

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

[0032] Figure 3 for Figure 1 A schematic diagram of the structure after the body has been removed;

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

[0034] Figure 5 for Figure 4 A schematic diagram of the structure after removing the molding plate;

[0035] Figure 6 for Figure 4 Top view;

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

[0037] Figure 8 for Figure 7 Enlarged structural diagram of part a;

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

[0039] In the diagram: 1. Machine body; 2. Hydraulic press; 3. Base plate; 4. Forming plate; 5. Top plate; 6. Forming cavity; 7. Slider; 8. Slide groove; 9. Arc groove; 10. Vertical rod; 11. Push roller; 12. Groove; 13. Rotating rod; 14. Drive rod; 15. Belt drive structure; 16. Fixed gear; 17. Connecting rod; 18. Rotating shaft; 19. Fixed gear ring; 20. Lifting groove; 21. Spring; 22. Lifting rack. Detailed Implementation

[0040] Reference Figures 1-9 A hot press for irregularly shaped bamboo products includes a machine 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 within the machine body 1. The bottom plate 3 and the two forming plates 4 are each provided with an arc-shaped forming cavity 6. The forming cavity 6 is used to place bamboo product raw materials and to provide corresponding space for subsequent bamboo product forming and to form corresponding shapes, thereby completing the production of irregularly shaped bamboo products, such as reconstituted bamboo flooring.

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

[0042] Slider 7 is fixedly installed on the side walls of the base plate 3, forming plate 4, and top plate 5, and multiple sliders 7 are staggered. Multiple grooves 8 are opened on the side wall of the machine body 1, and each groove 8 cooperates with the corresponding slider 7. The depth of the grooves 8 corresponding to the sliders 7 increases sequentially from top to bottom. The cooperation between the sliders 7 and the grooves 8 can limit the movement direction of the base plate 3, forming plate 4, and top plate 5. At the same time, the design of the different depths of the multiple grooves 8 limits the initial position and movement distance of the base plate 3, top plate 5, and forming plate 4 on the machine body 1, so that the base plate 3, forming plate 4, and top plate 5 can smoothly contact each other to achieve hot pressing treatment of the raw materials.

[0043] A hydraulic press 2 is fixedly installed inside 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 force for hot pressing. The upper surfaces of the base plate 3 and the two forming plates 4 are provided with grooves 12 that cooperate with the corresponding push rollers 11. The grooves 12 are designed to accommodate the push rollers 11 during hot pressing, thereby preventing the hot pressing process from being affected.

[0044] The body 1 is equipped with a heating device for providing a heat source. The heating device can be an existing electric heating or steam heating device. Its working principle and specific structure will not be described here.

[0045] The diameter of the pushing roller 11 is larger than the thickness of the bamboo product after molding. This size design allows the pushing roller 11 to contact the top surface of the raw material before it is completely hot-pressed during the hot pressing process. Then, during the continued hot pressing process to deform the raw material, the movement of the pushing roller 11 smoothly completes the unfolding and flattening of the raw material. The top plate 5 and the two molding plates 4 are equipped with transmission components that cooperate with multiple pushing rollers 11. The transmission components are used to make the left and right symmetrical pushing rollers 11 move in opposite directions to unfold the bamboo product raw material placed in the molding cavity 6. The movement trajectory of the pushing roller 11 is the same as the curvature of the molding cavity 6.

[0046] The transmission assembly consists of two rotating rods 13, two drive rods 14, two fixed gears 16, multiple belt drive structures 15, multiple connecting rods 17, multiple arc-shaped grooves 9, and multiple vertical rods 10. The two rotating rods 13 and two drive rods 14 are rotatably mounted within 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 mesh with each other. Belt drive structures 15 are installed between the front and rear ends of the two rotating rods 13 and the two drive rods 14. Each belt drive structure 15 is connected to a vertical rod 10 via a connecting rod 17. Each vertical rod 10 is connected to the corresponding push roller 11. The front and rear side walls of the top plate 5 are provided with arc-shaped grooves 9 that slide with the corresponding connecting rod 17. When the drive rod 14 rotates, it can drive the rotating rod 13 to rotate simultaneously through the belt drive structure 15. Then, under the meshing effect of the two fixed gears 16, the other drive rod 14 rotates counterclockwise at the same time. When the belt drive structure 15 is running, it can drive the connecting rod 17 to slide in the arc-shaped groove 9, and then drive the push roller 11 to move through the vertical rod 10 to realize the unfolding and processing of the raw materials.

[0047] The belt drive structure 15 consists 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 drive rod 14, the belt is mounted between the pulley 1 and the pulley 2, and the connecting rod 17 is fixedly connected to one end of the belt sidewall. 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 push roller 11. Through the design of the rotating shaft 18, when the push roller 11 unfolds and pushes the bamboo product raw material, its contact surface with the bamboo product raw material is arc-shaped. When the bamboo product raw material is stacked in an interlaced manner, the contact of the arc-shaped surface can make the bamboo product raw material unfold more evenly and improve its flatness after unfolding.

[0049] The drive assembly is used to drive the transmission assembly when the bottom plate 3, the two forming plates 4, and the top plate 5 are close together and the bamboo product raw material is hot-pressed. The top plate 5 and the two forming plates 4 are each equipped with a drive assembly. The drive assembly includes a lifting rack 22 that slides vertically on the top plate 5. The upper surface of the top plate 5 has a lifting groove 20 that slides vertically with the lifting rack 22. A spring 21 is installed between the lifting groove 20 and the bottom of the lifting rack 22. A fixed gear ring 19 that meshes with the lifting rack 22 is fixedly installed on the drive rod 14. During the hot-pressing process, taking the contact of the two forming plates 4 as an example, when they approach each other, the lifting rack 22 on the lower forming plate 4 will press against the bottom of the upper forming plate 4. At this time, multiple pushing rollers 11 at the bottom of the upper forming plate 4 will insert into the bamboo product raw material on the lower forming plate 4. As the two forming plates 4 continue to approach each other, the lifting rack 22 overcomes the elastic force of the spring 21 and enters the lifting groove 20. Then, through the meshing effect of the lifting rack 22 and the fixed gear ring 19, the right drive rod 14 rotates counterclockwise, while the left drive rod 14 rotates clockwise. Therefore, the pushing rollers 11 located at the front and rear ends of the forming plate 4 will unfold to the left and right, realizing the unfolding and flattening of the bamboo product raw material. Since the initial height of the bamboo product raw material piled on the forming cavity 6 is greater than the thickness of the bamboo product after forming, when the pushing rollers 11 unfold and flatten the bamboo product raw material, the bamboo product raw material in the middle of the forming cavity 6 is subjected to the squeezing effect of the two forming plates 4. This ensures that the bamboo product raw material will not slide to the middle due to the curvature of the forming cavity 6 during the unfolding process, thus improving the unfolding and flattening effect of the bamboo product raw material.

[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 this size design 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. Therefore, it can ensure that the unfolding and flattening operation during the hot pressing process can be carried out smoothly. A limit block is fixedly installed on the side wall of the lifting rack 22, and a limit groove is opened on the side wall of the lifting groove 20 to slide up and down with the limit block. 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-shaped block is fixedly installed at the end of the connecting rod 17 away from the belt drive structure 15. A T-shaped groove is opened on the side wall of the vertical rod 10 to slide with the T-shaped block, and a compression spring is installed between the T-shaped groove and the T-shaped block. Through the cooperation of the T-shaped block, the T-shaped groove and the compression spring, when the stacking height of the bamboo product raw material is too large during the unfolding and flattening process, the pushing roller 11 has a certain vertical movement space, thereby reducing the movement resistance of the pushing roller 11 and enabling it to better complete the unfolding process of the bamboo product raw material.

[0052] This invention discloses a hot-pressing process for irregularly shaped bamboo products, comprising the following steps:

[0053] S1: Take qualified bamboo strips and clean them. Then put the cleaned bamboo strips into a high-temperature oven and steam them for 3 hours to remove fungi and sugar. After that, divide the steamed bamboo strips into multiple bundles according to the amount of bamboo strips required for a single piece of irregular bamboo product and evenly stick them with adhesive as raw materials for bamboo products.

[0054] S2: Adjust the bamboo product hot press machine to ensure it can work smoothly and control the hot pressing temperature. Then separate the top plate 5, the forming plate 4 and the bottom plate 3 and put them in their initial positions.

[0055] S3: Place each bundle of processed bamboo product raw material in the middle of the corresponding molding cavity 6 in sequence, and make the distance between its front and rear ends consistent with the distance between the front and rear ends of the molding cavity 6.

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

[0057] S5: At this time, the gap between the bottom plate 3, the forming plate 4 and the top plate 5 is constant, and the bamboo product raw material is affected by the positions 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 drive rod 14 to rotate counterclockwise. Then, under the meshing effect of the two fixed gears 16, the other drive rod 14 rotates clockwise.

[0058] S6: When the drive rod 14 rotates, the connecting rod 17 moves along the arc groove 9 through the operation of the belt drive structure 15, which drives the push roller 11 to move from the middle to both sides, spreading the bamboo product raw material evenly. As the space at the top of the forming cavity 6 gradually decreases as the bottom plate 3, forming plate 4 and top plate 5 move upward, the bamboo product raw material that has been pushed away will not move back to the center along the arc surface of the forming cavity 6.

[0059] S7: After the bamboo product raw material is fully expanded, the space at the upper end of the forming cavity 6 is at its minimum. At this time, the pressure is maintained until the bamboo product raw material is hot-pressed into a shaped bamboo product. Then the hydraulic press 2 can be contracted 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 pushing roller 11 will also reset. After that, the workers can take out the shaped bamboo product for subsequent cutting and surface treatment.

[0060] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed invention.

Claims

1. A hot press for irregularly shaped bamboo products, comprising a machine body (1), characterized in that, Also includes: The bottom plate (3), top plate (5) and two forming plates (4) are distributed from top to bottom in the body (1). The bottom plate (3) and the two forming plates (4) are all provided with arc-shaped forming cavities (6). Pushing rollers (11) are provided on the front and rear side walls of the bottom of the top plate (5) and the two forming plates (4), and two symmetrical pushing rollers (11) are provided. The diameter of the pushing rollers (11) is larger than the thickness of the bamboo product after forming. The top plate (5) and the two forming plates (4) are provided with transmission components that cooperate with the multiple pushing rollers (11). The transmission components are used to make the symmetrical pushing rollers (11) move in opposite directions to unfold the bamboo product raw material placed in the forming cavity (6). The moving trajectory of the pushing rollers (11) is the same as the arc of the forming cavity (6). The driving component is used to drive the transmission component 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 provided with driving components. The driving component includes a lifting rack (22) that is slidably mounted on the top plate (5). 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. The transmission assembly consists of two rotating rods (13), two driving rods (14), two fixed gears (16), multiple belt drive structures (15), multiple connecting rods (17), multiple arc grooves (9), and multiple vertical rods (10). The two rotating rods (13) and the two driving rods (14) are rotatably installed in the top plate (5). The two fixed gears (16) are respectively fixedly installed on the two rotating rods (13) and the two fixed gears (16) mesh with each other. Belt drive structures (15) are installed between the front and rear ends of the two rotating rods (13) and the two driving rods (14). Each belt drive structure (15) is equipped with a vertical rod (10) through a connecting rod (17), and each vertical rod (10) is connected to the corresponding push roller (11). Arc grooves (9) that slide with the corresponding connecting rods (17) are opened on the front and rear side walls of the top plate (5). The upper surface of the top plate (5) 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 toothed ring (19) that meshes with the lifting rack (22) is fixedly installed on the drive rod (14).

2. The bamboo product hot press according to claim 1, characterized in that, The bottom plate (3), the forming plate (4) and the top plate (5) are all fixedly installed with sliders (7), and multiple sliders (7) are staggered. Multiple grooves (8) are opened on the side wall of the machine body (1), and each groove (8) is matched with the corresponding slider (7). The depth of the grooves (8) corresponding to the multiple sliders (7) increases sequentially from top to bottom.

3. A hot press for irregularly shaped bamboo products according to claim 2, characterized in that, A hydraulic press (2) is fixedly installed inside 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 cooperate with the corresponding push rollers (11).

4. A hot press for irregularly shaped bamboo products according to claim 3, 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 push roller (11).

5. A hot press for irregularly shaped bamboo products according to claim 4, characterized in that, A limiting block is fixedly installed on the side wall of the lifting rack (22), and a limiting groove is provided on the side wall of the lifting groove (20) to slide up and down with the limiting block.

6. A hot press for irregularly shaped bamboo products according to claim 5, characterized in that, A T-shaped block is fixedly installed at the end of the connecting rod (17) away from the belt drive structure (15). A T-shaped groove is provided on the side wall of the vertical rod (10) to slide with the T-shaped block, and a compression spring is installed between the T-shaped groove and the T-shaped block.

7. A hot pressing process for irregularly shaped bamboo products, using the hot pressing machine for irregularly shaped bamboo products as described in claim 6, characterized in that, Includes the following steps: S1: Take qualified bamboo strips and clean them. Then put the cleaned bamboo strips into a high-temperature oven and steam them for 3 hours to remove fungi and sugar. After that, divide the steamed bamboo strips into multiple bundles according to the amount of bamboo strips required for a single piece of irregular bamboo product and evenly stick them with adhesive as raw materials for bamboo products. S2: Adjust the bamboo product hot press machine to ensure it can work smoothly and control the hot pressing temperature. Then separate the top plate (5), the forming plate (4) and the bottom plate (3) and put them in the initial position. S3: Place each bundle of processed bamboo raw materials in the middle of the corresponding molding cavity (6) and make the distance between the front and rear ends of the raw materials consistent with the distance between the front and rear ends of the molding cavity (6); S4: Start the hydraulic press (2) to move the bottom plate (3) upward. After the bottom plate (3) moves upward, its upper lifting rack (22) contacts the bottom of the forming plate (4) located at the lower end and pushes the forming plate (4) upward. The forming plate (4) located at the lower end then pushes the forming plate (4) located at the upper end upward. After that, the forming plate (4) located at the upper end pushes the top plate (5) upward so that the upper lifting rack (22) of the top plate (5) contacts the top wall of the machine body (1). S5: At this time, the gap between the bottom plate (3), the forming plate (4) and the top plate (5) is constant, and the bamboo product raw material is affected by the positions 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 drive rod (14) to rotate counterclockwise. Then, under the meshing effect of the two fixed gears (16), the other drive rod (14) rotates clockwise. S6: When the drive rod (14) rotates, the connecting rod (17) moves along the arc groove (9) through the operation of the belt drive structure (15), which drives the push roller (11) to move from the middle to both sides, spreading the bamboo product raw materials evenly. As the space at the top of the forming cavity (6) gradually decreases as the bottom plate (3), forming plate (4) and top plate (5) move upward, the bamboo product raw materials that are pushed away will not move back to the middle along the arc surface of the forming cavity (6). S7: After the bamboo product raw material is fully expanded, the upper space 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 shaped bamboo product. Then the hydraulic press (2) can be contracted 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). Therefore, the pushing roller (11) will also reset. After that, the workers can take out the shaped bamboo product after forming for subsequent cutting and surface treatment.

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