A hot pressing device for medium-density fiberboard production and processing

Abstract

This utility model discloses a hot pressing device for medium-density fiberboard (MDF) production and processing, relating to the field of MDF production and processing technology. It includes a hot press with a feeding mechanism on its inner side. The feeding mechanism includes a support plate, the bottom of which is fixedly connected to the hot press. A receiving groove is formed in the middle of the top of the support plate, while rectangular grooves are formed on the left and right sides of the top. A feeding assembly is provided on the top of the support plate. This invention solves the problem that existing hot presses mostly require manual loading and unloading, requiring operators to manually feed the MDF into the processing area. Because the processing area is at a high temperature, arms and hands are prone to accidentally triggering hot components during loading, leading to burns. Furthermore, improper operation, such as improper placement, delayed hand removal, or accidental equipment startup, can easily result in hands being pinched by moving parts, further increasing overall safety risks.

Description

Technical Field

[0001] This utility model relates to the field of medium-density fiberboard (MDF) production and processing technology, specifically a hot pressing device for MDF production and processing. Background Technology

[0002] Medium-density fiberboard (MDF), a type of engineered wood product known for its uniform texture, excellent strength, and good processing performance, is widely used in furniture manufacturing, interior decoration, and packaging materials. Its production process involves key steps such as wood fiber preparation, adhesive mixing, laying and molding, hot-press curing, and post-sanding. Among these, hot-press curing is the core step that determines the final density, moisture content, and mechanical strength of MDF. The loosely laid fiber blanks are placed in a hot-press device and subjected to high temperatures of 180-220℃ and high pressures of 2.5-4MPa to rapidly cure the adhesive and simultaneously compact the fibers to form a board that meets the required specifications. Currently, the loading and unloading of hot presses used in medium density fiberboard production generally rely on manual operation. Operators need to manually push the semi-finished boards to be hot-pressed into the processing area of ​​the hot press by hand or with the help of simple tools, and then use high-temperature pressing plates to solidify them. After processing is completed, the formed boards are manually removed from the processing area. The problem with existing technology is that most existing hot presses require manual loading and unloading. Operators need to manually feed the medium-density fiberboard into the processing area. Since the processing area is at a high temperature, the arms, hands and other limbs are prone to accidentally triggering the hot parts during the loading process, resulting in burns. In addition, if the operation is not coordinated properly, such as adjusting the placement position, not removing the hands in time, or the equipment is accidentally started, the hands are very likely to be pinched by the moving parts of the equipment, which further increases the overall safety risk. Utility Model Content

[0003] To address the problems mentioned in the background art, the purpose of this utility model is to provide a hot pressing device for medium-density fiberboard (MDF) production and processing. This device offers the advantages of convenient loading and unloading, solving the problem that existing hot presses mostly require manual loading and unloading. Operators must manually feed the MDF into the processing area, where the high temperature can easily cause burns due to accidental triggering of hot parts by arms, hands, or other limbs during loading. Furthermore, improper operation, such as improper placement, delayed hand removal, or accidental equipment startup, can easily result in hands being pinched by moving parts, further increasing the overall safety risk.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a hot pressing device for the production and processing of medium-density fiberboard, comprising a hot press, wherein a feeding mechanism is provided inside the hot press. The feeding mechanism includes a support plate, the bottom of which is fixedly connected to the hot press. A receiving groove is provided in the middle of the top of the support plate, and rectangular grooves are provided on the left and right sides of the top. The top of the support plate is provided with a feeding assembly, and the inner cavity of the receiving groove is provided with a driving assembly that works in conjunction with the feeding assembly.

[0005] As a preferred embodiment of the present invention, the feeding assembly includes a feeding frame, the bottom of the inner wall of the feeding frame is provided with a cross-shaped groove, and the inner cavity is provided with a lifting plate corresponding to the position of the cross-shaped groove. Rectangular blocks are fixedly connected to the left and right sides of the bottom. The bottom of the rectangular blocks passes through the rectangular groove and extends into the inner cavity of the rectangular groove, and contacts the inner wall of the rectangular groove.

[0006] As a preferred embodiment of this utility model, the top left and right sides of the feeding frame are provided with limiting grooves, and the left and right sides are provided with extrusion plates. The inner cavity of the limiting groove is provided with limiting blocks, and the front and rear sides of the inner wall are provided with sliding grooves that communicate with the cross-shaped groove.

[0007] As a preferred embodiment of this utility model, the bottoms of the two extrusion plates are fixedly connected to the support plate, and stroke holes are provided on opposite sides. The two limiting blocks are fixedly connected to the lifting plate on opposite sides, and are fixedly connected to the squeezing column on opposite sides. Slider blocks are fixedly connected to the front and rear sides, and the side of the slider away from the limiting block is slidably connected to the slide groove.

[0008] As a preferred embodiment of this utility model, the front section of the inner cavity of the stroke hole is inclined, while the rear section is horizontal. The side of the extrusion column away from the limiting block passes through the stroke hole and extends into the inner cavity of the inclined section of the stroke hole, and contacts the inner wall of the inclined section of the stroke hole through a bearing.

[0009] In a preferred embodiment of this invention, the drive assembly includes a servo motor, a screw, and a moving block. The rear side of the screw is rotatably connected to the inner wall of the receiving groove, while the front side penetrates the receiving groove and extends to the outer side of the receiving groove, where it is fixedly connected to the output end of the servo motor. The rear side of the servo motor is fixedly connected to a support plate. The moving block is sleeved on the surface of the screw and threadedly connected to the screw, with both its left and right sides in contact with the inner wall of the receiving groove.

[0010] In a preferred embodiment of this invention, the top of the movable block is fixedly connected to the feeding frame, and telescopic covers are provided on both the front and rear sides. The telescopic covers are fitted onto the surface of the screw, and both ends are fixedly connected to the inner wall of the receiving groove and the movable block, respectively.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: 1. This utility model solves the problem of existing hot presses requiring manual loading and unloading of medium-density fiberboard (MDF) by setting up a feeding mechanism. Operators must manually feed the MDF into the processing area, where the high temperature can easily cause burns due to accidental contact with hot parts. Furthermore, improper operation, such as incorrect placement, delayed hand removal, or accidental equipment startup, can easily result in hand injuries from moving parts, further increasing overall safety risks. This new model automatically loads and unloads MDF from the processing area, avoiding injuries during manual loading and unloading and improving processing safety.

[0012] 2. By setting up a feeding component, this utility model can not only accommodate and limit the medium density fiberboard through the feeding frame to ensure accurate positioning of the fiberboard during hot pressing and avoid processing size deviation due to offset, but also automatically drive the lifting plate to rise during the movement of the feeding frame by means of the linkage between the extrusion column and the stroke hole, so as to lift the hot-pressed fiberboard away from the bottom of the feeding frame, making it convenient for operators to pick up the material.

[0013] 3. This utility model, by setting up a drive component, utilizes the threaded transmission between a servo motor and a screw to realize the automatic entry and exit of the feeding frame into the hot pressing area, replacing manual pushing and improving processing safety. At the same time, the telescopic cover is a high-temperature resistant telescopic cover, which protects the screw, reduces the wear of fiber debris on the transmission components, extends the equipment maintenance cycle, and reduces operation and maintenance costs. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the support plate structure; Figure 3 This is a schematic diagram of the driver component structure; Figure 4 This is a schematic diagram of the feeding assembly structure.

[0015] In the diagram: 1. Hot press; 2. Feeding mechanism; 3. Limiting groove; 4. Extrusion plate; 5. Limiting block; 6. Slide groove; 7. Stroke hole; 8. Extrusion column; 9. Slider; 10. Telescopic cover; 21. Support plate; 22. Receiving groove; 23. Rectangular groove; 24. Feeding assembly; 25. Drive assembly; 241. Feeding frame; 242. Cross-shaped groove; 243. Lifting plate; 244. Rectangular block; 251. Servo motor; 252. Screw; 253. Moving block. Detailed Implementation

[0016] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings.

[0017] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Those skilled in the art can make similar extensions without departing from the spirit of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0018] Secondly, the term "an embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that excludes other embodiments.

[0019] Secondly, this utility model is described in detail with reference to the schematic diagrams. When describing the embodiments of this utility model, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not limit the scope of protection of this utility model. In addition, actual manufacturing should include the three-dimensional spatial dimensions of length, width, and depth. Example

[0020] Reference Figure 1-4 This is the first embodiment of the present invention, which provides a hot pressing device for the production and processing of medium-density fiberboard, including a hot press 1, and a feeding mechanism 2 is provided inside the hot press 1. The feeding mechanism 2 includes a support plate 21. The bottom of the support plate 21 is fixedly connected to the hot press 1. A receiving groove 22 is provided in the middle of the top of the support plate 21, and rectangular grooves 23 are provided on the left and right sides of the top. The top of the support plate 21 is provided with a feeding assembly 24, and the inner cavity of the receiving groove 22 is provided with a drive assembly 25 that works in conjunction with the feeding assembly 24.

[0021] Specifically, by setting up the feeding mechanism 2, the problem of the existing hot press 1 requiring manual loading and unloading is solved. Operators need to manually feed the medium-density fiberboard into the processing area. Since the processing area is at a high temperature, the arms, hands, and other limbs are prone to accidentally triggering the hot parts during the loading process, resulting in burns. In addition, if the operation is not coordinated properly, such as adjusting the placement position, not removing the hands in time, or the equipment is accidentally started, the hands are very likely to be pinched by the moving parts of the equipment, further increasing the overall safety risk. The solution achieves the effect of automatically putting or taking out the medium-density fiberboard from the processing area, avoiding injuries during manual placement or removal, and improving the safety of processing.

[0022] Furthermore, the support plate 21, as the core load-bearing component of the feeding mechanism 2, is fixedly connected to the hot press 1 at the bottom to ensure that the overall structure does not shift during the feeding process. The rectangular groove 23 at the top provides a moving guide for the feeding assembly 24, while the receiving groove 22 provides a movement space for the drive assembly 25. The drive assembly 25, as a power source, can drive the feeding assembly 24 to move smoothly along the direction of the rectangular groove 23, realizing the automatic entry and exit of medium density fiberboard into and out of the hot pressing area. The feeding assembly 24 is responsible for receiving the fiberboard and restricting its position to prevent the fiberboard from shifting during feeding, replacing manual loading and unloading, and fundamentally avoiding safety risks. Example

[0023] In the second embodiment of this utility model, the feeding assembly 24 includes a feeding frame 241. A cross-shaped groove 242 is provided at the bottom of the inner wall of the feeding frame 241, and a lifting plate 243 corresponding to the position of the cross-shaped groove 242 is provided in the inner cavity. Rectangular blocks 244 are fixedly connected to the left and right sides of the bottom. The bottom of the rectangular blocks 244 passes through the rectangular groove 23 and extends into the inner cavity of the rectangular groove 23, and contacts the inner wall of the rectangular groove 23.

[0024] Limiting grooves 3 are provided on the left and right sides of the top of the feeding frame 241, and extrusion plates 4 are provided on the left and right sides. Limiting blocks 5 are provided in the inner cavity of the limiting grooves 3, and sliding grooves 6 that communicate with the cross-shaped grooves 242 are provided on the front and rear sides of the inner wall.

[0025] The bottoms of the two extrusion plates 4 are fixedly connected to the support plate 21, and each side of the plate has a stroke hole 7. The two limiting blocks 5 are fixedly connected to the lifting plate 243 on opposite sides, while the opposite sides are fixedly connected to the squeezing column 8. The slider 9 is fixedly connected to both the front and rear sides. The side of the slider 9 away from the limiting block 5 is slidably connected to the slide groove 6.

[0026] The front section of the inner cavity of the stroke hole 7 is inclined, while the rear section is horizontal. The side of the extrusion column 8 away from the limit block 5 passes through the stroke hole 7 and extends into the inner cavity of the inclined section of the stroke hole 7, and contacts the inner wall of the inclined section of the stroke hole 7 through the bearing.

[0027] Specifically, by setting up the feeding component 24, not only can the medium density fiberboard be accommodated and limited by the feeding frame 241 to ensure accurate positioning of the fiberboard during hot pressing and avoid deviation in processing dimensions due to offset, but also the lifting plate 243 can be automatically driven to rise during the movement of the feeding frame 241 by the linkage of the extrusion column 8 and the stroke hole 7, so as to lift the hot-pressed fiberboard away from the bottom of the feeding frame 241, making it easier for the operator to pick up the material.

[0028] Furthermore, the feeding frame 241 cooperates with the rectangular groove 23 of the support plate 21 through the rectangular block 244 at the bottom, and moves without deviation along the direction of the rectangular groove 23, ensuring that the fiberboard is accurately aligned with the hot pressing area. The cross-shaped groove 242 can accommodate the lifting plate 243 when it descends. When the feeding frame 241 moves towards the hot pressing area, the extrusion column 8 on the limit block 5 slides along the inclined section of the stroke hole 7 of the extrusion plate 4. As the height of the inclined section of the stroke hole 7 gradually decreases, the extrusion column 8 drives the limit block 5 to move downward synchronously, thereby pulling the lifting plate 243 down to the inner cavity of the cross-shaped groove 242 at the bottom of the feeding frame 241. At this time, the fiberboard located at the top of the lifting plate 243 is stably placed in the inner cavity of the feeding frame 241. After hot pressing is completed, the feeding frame 241 moves away from the hot pressing area, and the extrusion column 8 slides in the opposite direction along the inclined section of the stroke hole 7, driving the limiting block 5 and the lifting plate 243 to move upward, lifting the fiberboard away from the bottom of the feeding frame 241. The sliders 9 on the front and rear sides of the limiting block 5 cooperate with the slide groove 6 of the feeding frame 241 to limit the limiting block 5 and ensure that the lifting plate 243 rises and falls smoothly. Example

[0029] In the third embodiment of this utility model, the drive assembly 25 includes a servo motor 251, a screw 252, and a moving block 253. The rear side of the screw 252 is rotatably connected to the inner wall of the receiving groove 22, while the front side penetrates the receiving groove 22 and extends to the outer side of the receiving groove 22 and is fixedly connected to the output end of the servo motor 251. The rear side of the servo motor 251 is fixedly connected to the support plate 21. The moving block 253 is sleeved on the surface of the screw 252 and threadedly connected to the screw 252, and both its left and right sides are in contact with the inner wall of the receiving groove 22.

[0030] The top of the movable block 253 is fixedly connected to the feeding frame 241, and telescopic covers 10 are provided on both the front and rear sides. The telescopic covers 10 are fitted onto the surface of the screw 252, and both ends are fixedly connected to the inner wall of the receiving groove 22 and the movable block 253, respectively.

[0031] Specifically, by setting up the drive component 25, the screw drive between the servo motor 251 and the screw 252 is used to realize the automatic entry and exit of the feeding frame 241 into the hot pressing area, replacing manual pushing and improving the safety of processing. At the same time, the telescopic cover 10 is a high temperature resistant telescopic cover 10, which protects the screw 252, reduces the wear of fiber debris on the transmission components, extends the equipment maintenance cycle, and reduces operation and maintenance costs.

[0032] Furthermore, after the servo motor 251 is started, the output end drives the screw 252 to rotate around its own axis. Since the moving block 253 is threadedly connected to the screw 252, and the left and right sides of the moving block 253 are in contact with the inner wall of the receiving groove 22, the moving block 253 is restricted from rotating with the screw 252. The rotational motion of the screw 252 is converted into the linear motion of the moving block 253 along the axial direction of the receiving groove 22. The top of the moving block 253 is fixedly connected to the feeding frame 241, which can drive the feeding frame 241 to move synchronously, so that the fiberboard can automatically enter or exit the hot pressing area. The telescopic cover 10 extends and retracts synchronously with the movement of the moving block 253. When the moving block 253 moves into the hot pressing area, the telescopic cover 10 is compressed. When the moving block 253 moves in the opposite direction, the telescopic cover 10 extends, always covering the exposed part of the screw 252, isolating debris and dust, and ensuring smooth thread transmission.

[0033] During operation, the operator places the fiberboard directly on the top of the lifting plate 243 at a suitable position. The inner cavity size of the feeding frame 241 is compatible with the conventional size of the fiberboard, which can initially limit the fiberboard and prevent it from moving during subsequent processing. At the same time, the telescopic cover 10 covers the exposed part of the screw 252 to isolate external dust and fiber debris. After placement, the servo motor 251 in the drive assembly 25 is started. The output end of the servo motor 251 drives the screw 252 to rotate clockwise around its own axis. Since the moving block 253 is threadedly connected to the screw 252 and the left and right sides of the moving block 253 are in contact with the inner wall of the receiving groove 22, the rotational motion of the screw 252 is converted into the linear motion of the moving block 253 along the axial direction of the receiving groove 22, which drives the top fixed feeding frame 241 to move synchronously towards the hot pressing area. The rectangular block 244 at the bottom of the feeding frame 241 slides along the rectangular groove 23 of the support plate 21, providing stable guidance for the feeding frame 241, ensuring that the moving direction does not deviate, and avoiding misalignment between the fiberboard and the hot pressing area; As the feeding frame 241 moves toward the hot pressing area, the limiting block 5 in the top limiting groove 3 moves synchronously. The extrusion column 8 on the outside of the limiting block 5 slides along the inclined section of the stroke hole 7 of the extrusion plate 4. The extrusion column 8 is squeezed by the inner wall of the inclined section, which drives the limiting block 5 to move downward along the limiting groove 3 of the feeding frame 241. This, in turn, pulls the lifting plate 243, which is fixed to the limiting block 5, to descend synchronously. During the descent of the lifting plate 243, the sliders 9 on its front and rear sides slide along the sliding groove 6 on the inner wall of the feeding frame 241 to ensure that the lifting plate 243 descends smoothly and without tilting. Finally, the lifting plate 243 is completely embedded in the cross-shaped groove 242 at the bottom of the feeding frame 241, and the fiberboard adheres to the bottom of the feeding frame 241, preparing for subsequent hot pressing and curing. When the feeding frame 241 is fully inside the hot pressing area and the fiberboard is precisely aligned with the high-temperature platen of the hot press 1, the servo motor 251 stops running, and the moving block 253 maintains its current position with the feeding frame 241. At this time, the extrusion column 8 slides to the horizontal section of the stroke hole 7, and the inner wall of the horizontal section limits the extrusion column 8 to prevent the feeding frame 241 from shifting during the hot pressing process, thus ensuring accurate positioning of the fiberboard. When the hot press 1 is started, its high-temperature platen applies downward pressure to heat-press and solidify the fiberboard in the feeding frame 241. During this process, the telescopic cover 10 of the drive component 25 always wraps around the screw 252 to prevent fiber debris and molten adhesive particles generated by hot pressing from adhering to the thread surface of the screw 252, thus preventing subsequent transmission jamming. The rigid structure of the feeding frame 241 can withstand the hot pressing pressure, preventing the fiberboard from deforming at the edges due to pressure and ensuring the dimensional accuracy of the processed board. After hot pressing and curing, the high-temperature platen of the hot press 1 is reset upward, the servo motor 251 is started to rotate in the opposite direction, and the screw 252 rotates synchronously in the opposite direction. The moving block 253 moves along the receiving groove 22 in a direction away from the hot pressing area, thereby driving the feeding frame 241 to exit the hot pressing area. The telescopic cover 10 extends synchronously with the movement of the moving block 253, and continues to play a protective role. During the retraction of the feeding frame 241, the extrusion column 8 slides in the opposite direction along the inclined section of the stroke hole 7. The inner wall of the inclined section exerts an upward thrust on the extrusion column 8, which drives the limit block 5 to move upward along the limit groove 3, thereby pulling the lifting plate 243 to rise synchronously. During the rise of the lifting plate 243, the slider 9 slides smoothly along the slide groove 6. Finally, the lifting plate 243 lifts the fiberboard away from the bottom of the feeding frame 241, making it easier for the operator to grab it. Once the feeding frame 241 has completely exited the hot pressing area, the servo motor 251 stops running; the operator directly grabs the lifted fiberboard, removes the fiberboard, and the device returns to its initial state, ready for the next hot pressing cycle.

[0034] In summary, by setting up the feeding mechanism 2, the medium-density fiberboard can be automatically placed into or removed from the processing area, avoiding injuries that may occur during manual placement or removal, and improving the safety of the processing.

[0035] It should be noted that the servo motor and the screw are existing devices or equipment, or devices or equipment that can be implemented by existing technology. The power supply, connection method, usage method, power source, fixing method, installation method, control method, etc. of the device, as well as the materials of each accessory and the selection of various parameters are common knowledge to those skilled in the art, and therefore will not be described in detail in this application document.

[0036] It is important to note that the constructions and arrangements of this application shown in several different exemplary embodiments are merely illustrative. Although only a few embodiments are described in detail in this disclosure, those who consult this disclosure will readily understand that many modifications are possible (e.g., changes in the size, dimensions, structure, shape and proportion of various elements, as well as parameter values ​​(e.g., temperature, pressure, etc.), mounting arrangements, use of materials, color, orientation, etc.) without substantially departing from the novel teachings and advantages of the subject matter described in this application). For example, an element shown as integrally formed may be composed of multiple parts or elements, the position of elements may be inverted or otherwise altered, and the nature or number or position of discrete elements may be changed or altered. Therefore, all such modifications are intended to be included within the scope of this utility model. The order or sequence of any process or method steps may be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure described herein that performs the function, and not only structural equivalents but also equivalent structures. Without departing from the scope of this invention, other substitutions, modifications, alterations, and omissions may be made in the design, operation, and arrangement of the exemplary embodiments. Therefore, this invention is not limited to the specific embodiments, but extends to various modifications that still fall within the scope of the appended claims.

[0037] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of actual embodiments (i.e., those features that are not relevant to the best mode of carrying out the present invention as currently considered, or those features that are not relevant to implementing the present invention) may be omitted.

[0038] It should be understood that numerous specific implementation decisions can be made during the development of any practical implementation, such as in any engineering or design project. Such development efforts may be complex and time-consuming, but for those skilled in the art who benefit from this disclosure, the development effort will be a routine work of design, manufacturing, and production without requiring much experimentation.

[0039] It should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of the technical solution of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A hot pressing device for the production and processing of medium-density fiberboard, comprising a hot press (1), characterized in that: The hot press (1) is provided with a feeding mechanism (2) on its inner side. The feeding mechanism (2) includes a support plate (21), the bottom of which is fixedly connected to the hot press (1), and a receiving groove (22) is provided in the middle of the top of the support plate (21), while rectangular grooves (23) are provided on the left and right sides of the top. The top of the support plate (21) is provided with a feeding assembly (24), and the inner cavity of the receiving groove (22) is provided with a driving assembly (25) that works in conjunction with the feeding assembly (24).

2. The hot pressing device for medium-density fiberboard production and processing according to claim 1, characterized in that: The feeding assembly (24) includes a feeding frame (241). The bottom of the inner wall of the feeding frame (241) is provided with a cross-shaped groove (242), and the inner cavity is provided with a lifting plate (243) corresponding to the position of the cross-shaped groove (242). A rectangular block (244) is fixedly connected to the left and right sides of the bottom. The bottom of the rectangular block (244) passes through the rectangular groove (23) and extends into the inner cavity of the rectangular groove (23), and contacts the inner wall of the rectangular groove (23).

3. The hot pressing device for medium-density fiberboard production and processing according to claim 2, characterized in that: Limiting grooves (3) are provided on the left and right sides of the top of the feeding frame (241), and extrusion plates (4) are provided on the left and right sides. Limiting blocks (5) are provided in the inner cavity of the limiting groove (3), and sliding grooves (6) that communicate with the cross-shaped groove (242) are provided on the front and rear sides of the inner wall.

4. The hot pressing device for medium-density fiberboard production and processing according to claim 3, characterized in that: The bottoms of the two extrusion plates (4) are fixedly connected to the support plate (21), and each of them has a stroke hole (7) on its opposite side. The two limiting blocks (5) are fixedly connected to the lifting plate (243) on opposite sides, and are fixedly connected to the squeezing column (8) on opposite sides. The slider (9) is fixedly connected to the front and rear sides. The slider (9) is slidably connected to the slide groove (6) on the side away from the limiting block (5).

5. The hot pressing device for medium-density fiberboard production and processing according to claim 4, characterized in that: The front section of the inner cavity of the stroke hole (7) is inclined, while the rear section is horizontal. The side of the extrusion column (8) away from the limiting block (5) passes through the stroke hole (7) and extends into the inner cavity of the inclined section of the stroke hole (7), and contacts the inner wall of the inclined section of the stroke hole (7) through the bearing.

6. The hot pressing device for medium-density fiberboard production and processing according to claim 1, characterized in that: The drive assembly (25) includes a servo motor (251), a screw (252), and a moving block (253). The rear side of the screw (252) is rotatably connected to the inner wall of the receiving groove (22), while the front side penetrates the receiving groove (22) and extends to the outer side of the receiving groove (22) and is fixedly connected to the output end of the servo motor (251). The rear side of the servo motor (251) is fixedly connected to the support plate (21). The moving block (253) is sleeved on the surface of the screw (252) and threadedly connected to the screw (252). Both the left and right sides are in contact with the inner wall of the receiving groove (22).

7. The hot pressing device for medium-density fiberboard production and processing according to claim 6, characterized in that: The top of the movable block (253) is fixedly connected to the feeding frame (241), and telescopic covers (10) are provided on the front and rear sides. The telescopic covers (10) are sleeved on the surface of the screw (252), and both ends are fixedly connected to the inner wall of the receiving groove (22) and the movable block (253) respectively.

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