A plywood continuous hot-press forming system based on adaptive pressure control

Abstract

The application relates to the hot-press forming technical field of plywood and discloses a plywood continuous hot-press forming system based on self-adaptive pressure control, which comprises a base, a hot-press table is fixedly installed on the upper surface of the base, a bearing frame is fixedly installed on the upper surface of the hot-press table, and self-adaptive hot-press mechanisms are installed on the front and back sides of the bearing frame. The plywood continuous hot-press forming system based on self-adaptive pressure control is characterized in that when the plate blank has local bulging or uneven thickness, the hot-press roller is lifted upward, the U-shaped frame, the bearing block and the lower pressing frame are lifted, the connecting strip drives the rectangular block to compress the connecting spring one, the bearing seat drives the extension frame and the rotating shaft to be lifted, the coaxially-installed cam is driven to rotate, the contact radius of the cam and the roller is changed, the pressure applied to the hot-press roller is reversely adjusted through the roller, and the self-adaptive reverse adjustment that the thicker the plate blank is, the higher the hot-press roller is lifted, and the meshing lower pressing force is reduced is realized.

Description

Technical Field

[0001] This invention relates to the field of plywood hot pressing technology, specifically to a continuous hot pressing system for plywood based on adaptive pressure control. Background Technology

[0002] Plywood is a multi-layer engineered wood product made from thin veneers produced by rotary cutting of logs or slicing of timber. After drying and gluing, the veneers are assembled with adjacent layers having perpendicular fiber directions, and then hot-pressed and cured. This orthogonal structure gives it similar mechanical properties in both longitudinal and transverse directions, overcoming the shortcomings of natural wood such as cracking and warping, while retaining high strength and toughness. Plywood comes in large sheets and a wide range of thicknesses, and is widely used in furniture manufacturing, interior decoration, construction formwork, packaging boxes, and transportation. Its manufacturing process requires hot-pressing.

[0003] In the existing technology, the continuous slab blank after being coated with glue is placed on the heating steel belt that is circulating below. As the steel belt is conveyed forward, the slab blank enters the continuous pressure zone composed of multiple sets of upper hot pressure rollers and steel belts. Together with the heating steel belt, the slab blank is heated and extruded from both the top and bottom sides. Finally, a continuously formed plywood is obtained from the exit end. After cutting, curing and sanding, it becomes the finished product.

[0004] During hot pressing, uneven thickness of the incoming slab, differences in veneer splicing and moisture content cause local bulging. However, since the upper roller is rigidly fixed, excessive pressure is applied to the bulging areas, leading to crushing. If the pressure is too low, the thinner areas will not be properly bonded. This contradiction of crushing the thicker areas and failing to bond the thinner areas ultimately results in large thickness tolerances, uneven surface, and severely uneven distribution of internal bonding strength in the entire plywood, leading to an increased scrap rate.

[0005] Although the above problems can be solved by floating the upper roller, the upper roller is not very stable when moving up and down. It is easy for deviations to occur after multiple downward movements. This deviation will cause the slab to be subjected to lateral shear force during the movement, resulting in misalignment between veneer layers or wavy roller marks on the slab surface. This will cause the entire production line to frequently stop to calibrate the position of the roller system, increase equipment maintenance costs, and make it difficult to guarantee the long-term stability of product thickness uniformity and bonding quality. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this invention provides a continuous hot pressing forming device for plywood based on adaptive pressure control. This device has the advantages of adapting to hot pressing different types of plywood while avoiding deviations in the hot pressing position after prolonged use, thus solving the problems mentioned in the background art.

[0007] The present invention provides the following technical solution: a continuous hot pressing forming device for plywood based on adaptive pressure control, comprising a base, a hot pressing table fixedly installed on the upper surface of the base, a receiving frame fixedly installed on the upper surface of the hot pressing table, and adaptive hot pressing mechanisms installed on both the front and rear sides of the receiving frame. The power input end of the adaptive hot pressing mechanism is equipped with a floating pressure control mechanism that converts the lifting force of the uneven plywood surface into engagement pressure, and the power output end of the floating pressure control mechanism is equipped with a limiting mechanism that converts the floating force into engagement force. The adaptive hot pressing mechanism is composed of a floating pressure control mechanism and a limiting mechanism.

[0008] Preferably, the floating pressure control mechanism includes a connecting block, a connecting spring, a guide telescopic rod, a rectangular block, a roller, a rotating shaft, and a cam. The back of the connecting block is fixedly installed to the front of the receiving frame. One end of the connecting spring is fixedly installed to the lower surface of the connecting block. One end of the guide telescopic rod is fixedly installed to the lower surface of the connecting block. The top of the rectangular block is fixedly installed to the other ends of the connecting spring and the guide telescopic rod. The top of the roller housing is fixedly installed to the lower surface of the rectangular block. The outer surface of the cam fits against the outer surface of the roller. The outer surface of the rotating shaft is fixedly installed to the interior of the cam.

[0009] Preferably, the limiting mechanism includes a gear, a fixed rack, and a fixed plate. The back of the fixed plate is fixedly installed on the front of the receiving frame, the upper surface of the fixed rack is fixedly installed on the lower surface of the fixed plate, and the outer surface of the gear meshes with the left side of the fixed rack.

[0010] Preferably, a connecting spring 2 is fixedly installed on the lower inner surface of the receiving frame, and a guide telescopic rod 2 is fixedly installed on the lower inner surface of the receiving frame. A receiving block is fixedly installed at one end of both the connecting spring 2 and the guide telescopic rod 2.

[0011] Preferably, a U-shaped frame is fixedly installed at the bottom of the receiving block, and a hot pressure roller is installed on the inner side of the U-shaped frame.

[0012] Preferably, bearing seats are provided on both sides of the hot press roller, and an extension frame is fixedly installed on the right side of the bearing seat.

[0013] Preferably, the inner wall of the extension frame is rotatably mounted to the outer surface of the rotating shaft.

[0014] Preferably, a connecting strip is fixedly installed on the back of the rectangular block, a pressure bracket is fixedly installed at the bottom of the connecting strip, and the lower surface of the pressure bracket is fixedly installed on the upper surface of the U-shaped frame.

[0015] Preferably, a drive motor is installed on the right side of the front of the hot press table, a heating roller is installed on the output shaft of the drive motor, and a steel belt is installed on the outer surface of the heating roller.

[0016] A continuous hot pressing system for plywood based on adaptive pressure control includes a floating pressure control system, a limiting and guiding system, a hot pressing system, a power transmission system, and a base support system. The floating pressure control system consists of a connecting block, a connecting spring, a guide telescopic rod, a rectangular block, rollers, a rotating shaft, and a cam. When the hot press roller is lifted by the bulge of the slab, the upward lifting force is converted into the meshing downward pressure on the roller and the cam, realizing the reverse adaptive adjustment where the thicker the slab, the smaller the downward pressure, and providing a dynamically variable pressure output for the hot press roller. The limiting and guiding system consists of gears, a fixed rack, a fixed plate, a connecting spring, a guide telescopic rod, and a receiving block. The meshing of the gears and the fixed rack ensures the vertical movement accuracy of the hot press roller when it floats up and down, preventing skew and cumulative height deviation. The connecting spring and the guide telescopic rod provide stable guidance and reset force to the receiving block, ensuring that the hot press roller can accurately return to its position after frequent floating. The hot pressing forming system consists of a hot press table, a receiving frame, hot press rollers, a bearing seat, a U-shaped frame, heating rollers, and a steel belt. The heated steel belt carries and conveys the slab, and multiple sets of upper hot press rollers and steel belts together form a continuous pressure zone to heat and extrude the slab from both the top and bottom, so that the adhesive can be fully cured and the continuously formed plywood can be output. The power transmission system drives the heating roller to rotate the steel belt through a drive motor, and at the same time transmits the lifting and lowering motion of the hot pressure roller to the gears and cams through the extension frame and rotating shaft, so as to realize the linkage between pressure regulation and power transmission. The base support system provides a rigid installation foundation for the hot press table, the receiving frame, and all systems through the base, ensuring the stable operation of the entire machine.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. This continuous hot-press forming device for plywood based on adaptive pressure control, when there are local bulges or uneven thickness in the plywood blank, the hot-press roller is lifted upwards, driving the U-shaped frame, the receiving block, and the lower pressure frame to rise. Then, through the connecting strip, the rectangular block compresses the connecting spring, and the bearing seat drives the extension frame and the rotating shaft to rise, driving the coaxially mounted cam to rotate. This changes the contact radius between the cam and the roller, thereby adjusting the pressure applied to the hot-press roller in the opposite direction through the roller. This achieves adaptive reverse adjustment, where the thicker the plywood blank, the higher the hot-press roller is lifted, and the lower pressure decreases. This effectively solves the contradiction of rigid fixing causing crushing in thick areas and weak bonding in thin areas, reducing thickness tolerance and scrap rate, and ensuring the flatness of the plywood surface and the uniform distribution of internal bonding strength.

[0018] 2. This type of continuous hot pressing forming device for plywood based on adaptive pressure control, through the meshing of gears and fixed racks, and the guiding support of the receiving block by the connecting spring and the guide telescopic rod, ensures that the hot pressing roller maintains a precise vertical movement trajectory during frequent up-and-down floating. This avoids the axial misalignment, cumulative height deviation, and lateral shear force caused by guide rail wear or spring fatigue in traditional floating rollers. At the same time, the contact transmission structure of the cam and roller, combined with the stable support of the connecting spring and the guide telescopic rod, ensures a smooth and unobstructed pressure adjustment process, effectively preventing the occurrence of veneer layer misalignment or wavy roller marks on the board surface, reducing the frequency of downtime calibration, lowering equipment maintenance costs, and improving the long-term stability of product thickness uniformity and bonding quality. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the device of the present invention; Figure 2 For the present invention Figure 1 A schematic diagram of the side view structure; Figure 3 For the present invention Figure 1 A schematic diagram of the rear view structure; Figure 4 For the present invention Figure 1 A partial sectional view of the structure; Figure 5 For the present invention Figure 4 Enlarged schematic diagram of the structure at point A; Figure 6 For the present invention Figure 4 Enlarged schematic diagram of the structure at point B.

[0020] In the diagram: 1. Base; 2. Hot press table; 3. Drive motor; 4. Heating roller; 5. Steel belt; 6. Support frame; 7. Connecting block; 8. Connecting spring one; 9. Guide telescopic rod one; 10. Rectangular block; 11. Roller; 12. Connecting spring two; 13. Guide telescopic rod two; 14. Support block; 15. U-shaped frame; 16. Hot press roller; 17. Bearing seat; 18. Extension frame; 19. Rotating shaft; 20. Cam; 21. Connecting strip; 22. Lower pressure frame; 23. Gear; 24. Fixed rack; 25. Fixed plate. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] Please see Figure 1 , Figure 4 , Figure 5 and Figure 6 A continuous hot pressing forming device for plywood based on adaptive pressure control includes a base 1, a hot pressing table 2 fixedly installed on the upper surface of the base 1, a receiving frame 6 fixedly installed on the upper surface of the hot pressing table 2, and adaptive hot pressing mechanisms installed on both the front and rear sides of the receiving frame 6. The power input end of the adaptive hot pressing mechanism is equipped with a floating pressure control mechanism that converts the lifting force of the uneven plywood surface into engagement pressure, and the power output end of the floating pressure control mechanism is equipped with a limiting mechanism that converts the floating force into engagement force. The adaptive hot pressing mechanism is composed of a floating pressure control mechanism and a limiting mechanism. The floating pressure control mechanism includes a connecting block 7, a connecting spring 8, a guide telescopic rod 9, a rectangular block 10, a roller 11, a rotating shaft 19, and a cam 20. The back of the connecting block 7 is fixedly installed to the front of the receiving frame 6. One end of the connecting spring 8 is fixedly installed to the lower surface of the connecting block 7. One end of the guide telescopic rod 9 is fixedly installed to the lower surface of the connecting block 7. The top of the rectangular block 10 is fixedly installed to the other ends of the connecting spring 8 and the guide telescopic rod 9. The top of the outer shell of the roller 11 is fixedly installed to the lower surface of the rectangular block 10. The outer surface of the cam 20 is fitted to the outer surface of the roller 11. The outer surface of the rotating shaft 19 is... The surface is fixedly installed inside the cam 20. A connecting spring 22 is fixedly installed on the lower surface inside the support frame 6. A guide telescopic rod 23 is fixedly installed on the lower surface inside the support frame 6. A support block 14 is fixedly installed at one end of both the connecting spring 22 and the guide telescopic rod 23. A U-shaped frame 15 is fixedly installed at the bottom of the support block 14. A hot press roller 16 is installed inside the U-shaped frame 15. Bearing seats 17 are installed on both sides of the hot press roller 16. An extension frame 18 is fixedly installed on the right side of the bearing seat 17. A connecting strip 21 is fixedly installed on the back of the rectangular block 10. A lower pressure frame 22 is fixedly installed at the bottom of the connecting strip 21. The lower surface of the lower pressure frame 22 is fixedly installed on the upper surface of the U-shaped frame 15.

[0023] Specifically, the floating pressure control mechanism converts the lifting force from the uneven plywood surface into engagement downward pressure, and the limiting mechanism further converts the floating force into engagement force. This conversion method makes pressure control more precise. The cooperation between the connecting spring 8 and the guide telescopic rod 9 provides elastic support for the rectangular block 10 and ensures its stability in vertical movement, preventing instability in the position of the hot press roller 16 due to pressure fluctuations, thereby improving the stability of the entire device during the hot pressing process. The connecting spring 12 and the guide telescopic rod 13 provide elastic support and guidance for the receiving block 14, ensuring the stability of the hot press roller 16 during its up-and-down movement. The bearing seat 17 allows the hot press roller 16 to rotate flexibly, reduces frictional loss, and extends the service life of the hot press roller 16.

[0024] Please see Figure 1 , Figure 4 , Figure 5 and Figure 6 The limiting mechanism includes a gear 23, a fixed rack 24 and a fixed plate 25. The back of the fixed plate 25 is fixedly installed on the front of the receiving frame 6, the upper surface of the fixed rack 24 is fixedly installed on the lower surface of the fixed plate 25, and the outer surface of the gear 23 meshes with the left side of the fixed rack 24.

[0025] Specifically, the gear 23 in the limiting mechanism meshes with the fixed rack 24. When the floating pressure control mechanism drives the relevant components to move, the gear 23 moves along the fixed rack 24. This meshing method can provide precise displacement limitation and guidance, ensuring that the adaptive hot pressing mechanism accurately moves in the process of converting the unevenness of the plywood surface lifting force into meshing downward pressure, and further into stable meshing force. This ensures the accuracy of adaptive pressure control, allowing the hot pressing roller 16 to precisely adjust the pressure according to the plywood surface condition, thereby improving the hot pressing quality of the plywood.

[0026] Please see Figure 1 , Figure 2 , Figure 3 and Figure 4 A drive motor 3 is installed on the right side of the front of the hot press table 2. A heating roller 4 is installed on the output shaft of the drive motor 3. A steel belt 5 is installed on the outer surface of the heating roller 4.

[0027] Specifically, the drive motor 3 drives the heating roller 4 to rotate, and the heat generated by the heating roller 4 can be quickly transferred to the steel strip 5. The steel strip 5 has good thermal conductivity and a large contact area with the plywood surface, which can evenly conduct heat to all parts of the plywood, so that the plywood is heated evenly during hot pressing. This avoids hot pressing defects such as cracking and deformation caused by localized excessively high or low temperatures, thereby improving the product quality of the plywood. The continuous operation of drive motor 3 drives heating roller 4 and steel belt 5 to rotate continuously, achieving continuous hot pressing of plywood. Compared with the traditional intermittent hot pressing method, it eliminates the need for frequent equipment start-ups and shutdowns, reduces auxiliary time, greatly improves production efficiency, meets the needs of large-scale plywood production, and reduces production costs. Furthermore, by controlling the speed of drive motor 3, the running speed of steel belt 5 can be adjusted, thereby controlling the heating time of the plywood during the hot pressing process. Simultaneously, the heating temperature of heating roller 4 can be precisely adjusted according to different plywood materials and process requirements. This flexible control of hot pressing speed and temperature allows the device to adapt to the production needs of various plywood types, improving its versatility and adaptability.

[0028] A continuous hot pressing system for plywood based on adaptive pressure control; comprising:

[0029] Working principle: During use, the drive motor 3 drives the heating roller 4, which in turn drives the steel belt 5 to circulate on the upper surface of the hot press table 2. The continuous slab after gluing and assembly is placed on the circulating heating steel belt 5 below. As the steel belt 5 is conveyed forward, the slab enters the continuous pressure zone composed of multiple sets of upper hot press rollers 16 and the steel belt 5. Each set of hot press rollers 16 provides initial downward pressure through the connecting spring 12 and guide telescopic rod 13 connected to the receiving block 14 above it. Together with the heating steel belt 5, they heat and compress the slab from both the top and bottom. When there are local bulges or uneven thickness in the slab, the hot press rollers 16 are lifted upward by the slab, which drives the U-shaped frame 15, the receiving block 14, and the lower pressure frame 22 to rise synchronously. The lower pressure frame 22 drives the rectangular block 10 upward through the connecting bar 21 to compress the connecting spring 8 and the guide telescopic rod 9. At the same time, the rise of the rectangular block 10 changes the contact position between the roller 11 and the cam 20. At the same time, when the hot press roller 16 rises, the bearing seat 17 drives the extension frame 18 and the rotating shaft 19 to rise, so that the gear 23 meshes and rotates relative to the fixed rack 24, thereby driving the coaxial cam 20 to rotate. The rotation of cam 20 changes its contact radius with roller 11, applying a downward pressure increment through roller 11. This pressure is transmitted to U-shaped frame 15 via rectangular block 10, connecting strip 21, and lower pressure frame 22. This achieves a reverse adaptive adjustment where the thicker the slab, the higher the hot press roller 16 is lifted, the larger the rotation angle between gear 23 and cam 20, and the smaller the downward pressure applied by cam 20, thus preventing crushing in thick areas. When the slab becomes thinner, the hot press roller 16 is pressed down under the action of connecting spring 22, and the above mechanism reverses its action, automatically increasing the pressure to ensure strong bonding in thin areas. The slab is continuously heated and pressed in the continuous pressure-holding zone formed by multiple sets of hot press rollers 16 and steel belt 5, allowing the adhesive to fully cure. Finally, a continuously formed plywood is obtained from the exit end, which is then cut, cured, and sanded to become the finished product. Throughout the process, the meshing of gear 23 and fixed rack 24 ensures the motion accuracy of the hot press roller 16 when it floats up and down, avoiding skewness or cumulative height deviation.

[0030] The drive motor 3 is a 7.5kW three-phase asynchronous frequency converter motor of model YE3-132M-4. Its output shaft is connected to the heating roller 4 via a coupling. The heating roller 4 is a hollow heating roller consisting of a seamless steel tube with an outer diameter of Φ400mm and a wall thickness of 20mm, containing a 36kW electric heating tube assembly. The hot pressing roller 16 is a solid steel roller made of No. 45 steel with an outer diameter of Φ200mm and a wall thickness of 15mm, with a hard chrome plated surface, and also contains a 9kW electric heating tube. The power supply is provided by an external 380V industrial power supply connected to the distribution cabinet, which powers the drive motor 3 via a frequency converter, and simultaneously powers the heating roller 4 and the electric heating tubes in the hot pressing roller 16 via a temperature control module. 6. The fixed plate 25 and U-shaped frame 15 should be made of heat-resistant cast steel or No. 45 steel with heat treatment to avoid creep or fatigue fracture due to frequent heating. The gear 23 and fixed rack 24 should be made of carburized and quenched alloy steel with a tooth surface hardness of HRC58-62 to ensure wear resistance under frequent meshing. The contact surface between the cam 20 and the roller 11 should be surface hardened or inlaid with wear-resistant alloy. The connecting spring 18 and connecting spring 212 should be made of heat-resistant spring steel and maintain stable elastic performance at 200°C. The guide telescopic rod 19 and guide telescopic rod 213 should be surface-plated with hard chrome and equipped with self-lubricating copper sleeves or graphite bushings to reduce wear and jamming risks.

[0031] Before use, the surface of the steel strip 5 must be checked for cracks or scratches to ensure that the heating system of the heating roller 4 and the hot pressing roller 16 heats up to the set temperature evenly. It is strictly forbidden to start the slab in a cold state to avoid deformation of the hot pressing roller 16 or abnormal tension of the steel strip 5 due to excessive temperature difference. During operation, the meshing status of the gear 23 and the fixed rack 24 should be observed regularly to ensure sufficient lubrication. If abnormal noise or jamming occurs, the machine should be stopped immediately for inspection to prevent deviation of the hot pressing roller 16's vertical floating trajectory due to tooth surface wear. At the same time, pay attention to whether the preload of connecting spring 18 and connecting spring 212 has decreased. If the hot pressing roller 16 is found to be not resetting in time or the pressure fluctuation is abnormal, the springs should be replaced promptly. The contact surface between the cam 20 and the roller 11 should be regularly coated with high-temperature resistant grease to avoid dry friction causing contour wear and affecting pressure adjustment accuracy. The guide telescopic rod 19 and guide telescopic rod 213 should be kept clean to prevent dust or adhesive from entering the guide surface and causing jamming.

[0032] It should be noted that the scope of protection of this invention does not involve improvements to the internal structure and methods; furthermore, in this document, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus.

[0033] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A continuous hot pressing forming device for plywood based on adaptive pressure control, characterized in that: Includes a base (1), on the upper surface of the base (1) a hot press table (2) is fixedly installed, on the upper surface of the hot press table (2) a support frame (6) is fixedly installed, and adaptive hot press mechanisms are installed on both the front and rear sides of the support frame (6). The power input end of the adaptive hot pressing mechanism is equipped with a floating pressure control mechanism that converts the lifting force of the uneven plywood surface into engagement pressure, and the power output end of the floating pressure control mechanism is equipped with a limiting mechanism that converts the floating force into engagement force. The adaptive hot pressing mechanism is composed of a floating pressure control mechanism and a limiting mechanism.

2. The continuous hot pressing forming device for plywood based on adaptive pressure control according to claim 1, characterized in that: The floating pressure control mechanism includes a connecting block (7), a connecting spring (8), a guide telescopic rod (9), a rectangular block (10), a roller (11), a rotating shaft (19), and a cam (20). The back of the connecting block (7) is fixedly installed on the front of the support frame (6). One end of the connecting spring (8) is fixedly installed on the lower surface of the connecting block (7). One end of the guide telescopic rod (9) is fixedly installed on the lower surface of the connecting block (7). The top of the rectangular block (10) is fixedly installed on the other end of the connecting spring (8) and the guide telescopic rod (9). The top of the outer shell of the roller (11) is fixedly installed on the lower surface of the rectangular block (10). The outer surface of the cam (20) is fitted to the outer surface of the roller (11). The outer surface of the rotating shaft (19) is fixedly installed on the inside of the cam (20).

3. The continuous hot pressing forming device for plywood based on adaptive pressure control according to claim 1, characterized in that: The limiting mechanism includes a gear (23), a fixed rack (24) and a fixed plate (25). The back of the fixed plate (25) is fixedly installed on the front of the support frame (6). The upper surface of the fixed rack (24) is fixedly installed on the lower surface of the fixed plate (25). The outer surface of the gear (23) meshes with the left side of the fixed rack (24).

4. The continuous hot pressing forming device for plywood based on adaptive pressure control according to claim 1, characterized in that: A connecting spring 2 (12) is fixedly installed on the lower surface of the inner side of the receiving frame (6), and a guide telescopic rod 2 (13) is fixedly installed on the lower surface of the inner side of the receiving frame (6). A receiving block (14) is fixedly installed at one end of both the connecting spring 2 (12) and the guide telescopic rod 2 (13).

5. The continuous hot pressing forming device for plywood based on adaptive pressure control according to claim 4, characterized in that: A U-shaped frame (15) is fixedly installed at the bottom of the receiving block (14), and a hot pressure roller (16) is installed on the inner side of the U-shaped frame (15).

6. The continuous hot pressing forming device for plywood based on adaptive pressure control according to claim 5, characterized in that: Bearing seats (17) are installed on both sides of the hot press roller (16), and an extension frame (18) is fixedly installed on the right side of the bearing seat (17).

7. The continuous hot pressing forming apparatus for plywood based on adaptive pressure control according to claim 6, characterized in that: The inner wall of the extension frame (18) is rotatably mounted to the outer surface of the rotating shaft (19).

8. The continuous hot pressing forming device for plywood based on adaptive pressure control according to claim 2, characterized in that: A connecting strip (21) is fixedly installed on the back of the rectangular block (10), and a lower pressure frame (22) is fixedly installed at the bottom of the connecting strip (21). The lower surface of the lower pressure frame (22) is fixedly installed on the upper surface of the U-shaped frame (15).

9. The continuous hot pressing forming device for plywood based on adaptive pressure control according to claim 1, characterized in that: A drive motor (3) is installed on the right side of the front of the hot press table (2). A heating roller (4) is installed on the output shaft of the drive motor (3). A steel belt (5) is installed on the outer surface of the heating roller (4).

10. A continuous hot pressing system for plywood based on adaptive pressure control; characterized in that: Includes a floating pressure control system, a limit and guide system, a hot pressing system, a power transmission system, and a base support system. The floating pressure control system is composed of a connecting block (7), a connecting spring (8), a guide telescopic rod (9), a rectangular block (10), a roller (11), a rotating shaft (19), and a cam (20). When the hot press roller (16) is lifted by the bulge of the slab, the upward lifting force is converted into the meshing downward pressure on the roller (11) and the cam (20), realizing the reverse adaptive adjustment that the thicker the slab, the smaller the downward pressure, and providing a dynamically variable pressure output for the hot press roller (16). The limiting and guiding system is composed of a gear (23), a fixed rack (24), a fixed plate (25), a connecting spring (12), a guide telescopic rod (13), and a receiving block (14). The meshing of the gear (23) and the fixed rack (24) ensures the vertical movement accuracy of the hot press roller (16) when it floats up and down, and prevents skewness and cumulative height deviation. The connecting spring (12) and the guide telescopic rod (13) provide stable guidance and reset force to the receiving block (14), ensuring that the hot press roller (16) can still accurately return to its position after frequent floating. The hot pressing forming system consists of a hot press table (2), a receiving frame (6), hot press rollers (16), a bearing seat (17), a U-shaped frame (15), a heating roller (4), and a steel belt (5). The heating steel belt (5) carries and conveys the slab. Multiple sets of upper hot press rollers (16) and the steel belt (5) together form a continuous pressure zone to heat and extrude the slab from both the top and bottom, so that the adhesive is fully cured and the continuously formed plywood is finally output. The power transmission system drives the heating roller (4) through the drive motor (3) to drive the steel belt (5) to rotate in a cycle. At the same time, the lifting motion of the hot pressing roller (16) is transmitted to the gear (23) and cam (20) through the extension frame (18) and the rotating shaft (19), so as to realize the linkage between pressure regulation and power transmission. The base support system provides a rigid installation foundation for the hot press table (2), the support frame (6) and all systems through the base (1), ensuring the stable operation of the whole machine.

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