Heavy type directional structural slab pre-pressing machine

Abstract

The invention discloses a heavy type directional structural plate prepress, and relates to the technical field of prepresses, the heavy type directional structural plate prepress comprises a base and a prepressing assembly, a vertical plate frame is fixedly welded to the top of the base, a driving assembly is arranged in the vertical plate frame, the driving assembly comprises a motor, an output shaft of the motor is fixedly sleeved with a first belt pulley, and the output shaft of the motor is fixedly sleeved with a second belt pulley; the outer surface of the first belt wheel is movably sleeved with a belt body, two rubber rollers are movably embedded between the opposite inner walls of the vertical plate frame, and large gears are fixed to one ends of the two rubber rollers. According to the heavy type directional structural plate pre-pressing machine, when the heavy type directional structural plate pre-pressing machine is used for manufacturing an artificial plate, three sets of pressurizing rollers are designed, the pressurizing length of the pressurizing rollers exceeds that of similar products in the industry, a very good pre-pressing effect is achieved, and a powerful guarantee is provided for more efficient operation of a production line and obtaining of better-quality finished plates; the problem that in the prior art, most pre-pressing machines are low in pressing effect, and consequently plate blanks are prone to being broken and damaged is solved.

Description

Technical Field

[0001] The invention relates to the technical field of pre-pressing machines, in particular to a heavy-duty oriented structural board pre-pressing machine. Background Art

[0002] Pre-pressing machine is widely used in the production and processing industry of artificial board. It is a special equipment for the production of artificial board. It is mainly used to pre-press the artificial board material to make it more compact, reduce bubbles and surface cracks, and improve the overall quality of artificial board. It is suitable for the pressing and processing of various materials, such as wood, bamboo, hemp, straw, etc. It plays a very important role in the production of various density boards, particle boards, and structural boards. Pre-pressing machine is a very important and indispensable equipment in the production process of artificial board, which can improve production efficiency and improve the overall quality of artificial board.

[0003] Existing pre-pressing machines need to use pressure rollers to evenly apply pressure on the surface of raw materials when processing and manufacturing artificial boards, ensuring that materials in different areas are subjected to the same pressing force, thereby avoiding quality problems of the artificial boards caused by uneven pressure. However, most existing pre-pressing machines have only one set of pressure rollers, resulting in insufficient pre-pressing strength of the slab, which reduces the compacting effect of the artificial board, thereby reducing the stability of the artificial board forming, and causing the slab to break and break during the pre-pressing process.

[0004] So we proposed a heavy-duty oriented structural board pre-pressing machine to solve the above problems. Summary of the invention

[0005] The object of the present invention is to provide a heavy-duty oriented structural plate pre-pressing machine to solve the problem that most pre-pressing machines mentioned in the above background technology have low pressing effect and easily lead to fracture and damage of the slab.

[0006] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a heavy-duty oriented structural board pre-pressing machine, comprising a base and a pre-pressing assembly, a vertical plate frame is fixedly welded on the top of the base, a driving assembly is arranged inside the vertical plate frame, the driving assembly comprises a motor, a first pulley is fixedly sleeved on the output shaft of the motor, a belt body is movably sleeved on the outer surface of the first pulley, two rubber rollers are movably embedded between the relative inner walls of the vertical plate frame, a large gear is fixed on one end of the two rubber rollers, a small gear is meshed and connected on the outer surfaces of the two large gears, and the inner surfaces of the two small gears are meshed and connected. A limiting shaft is fixedly sleeved on the wall, a reducer is arranged at one end of the limiting shaft located at the upper part, a second pulley is fixedly sleeved on the output end of the reducer, two first groups of pressure rollers are movably embedded between the relative inner walls of the vertical plate frame near one side edge, two second groups of pressure rollers are movably embedded between the relative inner walls of the vertical plate frame near the center, two third groups of pressure rollers are movably embedded between the relative inner walls of the vertical plate frame near the other side edge, and a first sprocket is arranged on the other end of the two rubber rollers, one end of the two first groups of pressure rollers, one end of the two second groups of pressure rollers and one end of the two third groups of pressure rollers.

[0007] Preferably, outer surfaces of the two large gears are meshedly connected, the eight first sprockets are divided into four groups, and a first chain is movably embedded between the outer surfaces of each group of the first sprockets.

[0008] Preferably, a second sprocket is provided at the other end of the two first groups of pressure rollers and the other end of the two second groups of pressure rollers, the four second sprockets are divided into two groups, and a second chain is movably embedded between the outer surfaces of the two groups of second sprockets.

[0009] Preferably, the outer surface of the motor is fixedly connected to the outer surface of the vertical frame by screws, the inner wall of the belt body is slidingly connected to the outer surface of the second pulley, and the other ends of the two limit shafts are rotationally connected to the inner wall of the vertical frame.

[0010] Preferably, a pressure cylinder body is arranged between the outer surfaces of the two first groups of pressure rollers, the two second groups of pressure rollers and the two third groups of pressure rollers, and a plurality of rollers are arranged between the relative inner walls of the two vertical plate frames near the top and the bottom.

[0011] Preferably, a prestressing assembly is arranged inside the vertical plate frame, and the prestressing assembly includes a lower belt deviation adjustment device, the outer surface of the lower belt deviation adjustment device is fixedly connected to the inner wall of the vertical plate frame by screws, and a lower belt tensioning roller is arranged on the inner wall of the vertical plate frame.

[0012] Preferably, a first tensioning cylinder is arranged near one side edge of the inner wall of the vertical plate frame, a first pre-stressing roller group is movably embedded between the relative inner walls of the vertical plate frame near the bottom, and a lower transmission belt is arranged between the outer surfaces of a plurality of rollers located at the bottom.

[0013] Preferably, the outer surfaces of the lower belt deviation adjustment device, the lower belt tensioning roller, the first pre-pressure roller group, the first group of pressure rollers located on the lower side, the second group of pressure rollers located on the lower side, the third group of pressure rollers located on the lower side and the rubber roller located on the lower side all slide with the outer surface of the lower transmission belt.

[0014] Preferably, an upper belt deviation adjustment device is arranged on the inner wall of the vertical plate frame near the top, an upper belt tensioning roller is arranged on the inner wall of the vertical plate frame, a second tensioning cylinder is arranged on the inner wall of the vertical plate frame, a second pre-stressing roller group is movably embedded between the relative inner walls of the vertical plate frame near the top, and an upper transmission belt is arranged on the outer surface of the upper belt deviation adjustment device.

[0015] Preferably, the outer surfaces of the upper belt tensioning roller, the second pre-pressing roller group, the first group of pressing rollers located on the upper side, the second group of pressing rollers located on the upper side, the third group of pressing rollers located on the upper side and the rubber roller located on the upper side all slide with the outer surface of the upper transmission belt, and a pre-pressing roller pressure cylinder is arranged near the top of the inner wall of the vertical plate frame.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. When using a heavy-duty pre-pressing machine to make artificial boards, three sets of pressure rollers are designed, and the pressure length exceeds that of similar products in the industry, which has a very good pre-pressing effect, providing a strong guarantee for more efficient operation of the production line and obtaining higher-quality finished boards, and solving the problem that most pre-pressing machines in the existing technology have low pressing effects and are prone to breakage and damage of the slabs.

[0017] 2. Through the action of the pressure cylinder body and the pre-pressing machine roller pressure cylinder, the heavy-duty pre-pressing machine has the characteristics of strong flexibility, convenient adjustment, wide adaptability, and can be adjusted according to different materials and product requirements to achieve different pressing effects.

[0018] 3. By pre-pressing the artificial board with the first pre-pressing roller group and the second pre-pressing roller group, and then pressing it with three groups of pressure rollers, the pre-pressing effect is good, the running speed is improved, the load pressure of the hot press machine is reduced, the density error in the thickness direction of the board is reduced, and the hot pressing cycle is shortened, thereby improving the production capacity of the hot press machine. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a front perspective view of a heavy-duty oriented structural board pre-pressing machine of the present invention; Figure 2 It is a three-dimensional diagram of a driving assembly portion of a heavy-duty oriented structural board pre-pressing machine of the present invention; Figure 3 It is a schematic diagram of the running direction of the slab blank of a heavy-duty oriented structural slab pre-pressing machine of the present invention; Figure 4It is a three-dimensional diagram of a large gear portion of a heavy-duty oriented structural board pre-pressing machine of the present invention; Figure 5 The present invention is a schematic diagram of the mechanical equipment transmission of a heavy-duty oriented structural board pre-pressing machine.

[0020] In the figure: 1. Base; 2. Roller; 3. Vertical frame; 4. Driving assembly; 401. Motor; 402. First pulley; 403. Belt body; 404. Second pulley; 405. Speed ​​reducer; 406. Pinion; 407. Big gear; 408. Rubber roller; 409. First sprocket; 410. Second sprocket; 411. First chain; 412. First set of rollers; 413. Second set of rollers; 414. Third set of rollers; 415. 5. Limiting shaft; 416. Second chain; 5. Pressurizing cylinder body; 6. Pre-pressing assembly; 601. Lower belt deviation adjustment device; 602. Lower belt tensioning roller; 603. Lower transmission belt; 604. First tensioning cylinder; 605. First pre-pressing roller group; 606. Upper belt deviation adjustment device; 607. Upper belt tensioning roller; 608. Upper transmission belt; 609. Second tensioning cylinder; 610. Second pre-pressing roller group; 7. Pre-pressing machine roller pressurizing cylinder. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the implementation regulations described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] See also Figure 1-5The present invention provides a technical solution: a heavy-duty oriented structural board pre-pressing machine, comprising a base 1 and a pre-pressing assembly 6, a vertical plate frame 3 is fixedly welded on the top of the base 1, and is characterized in that: a driving assembly 4 is arranged inside the vertical plate frame 3, and the driving assembly 4 includes a motor 401, an output shaft of the motor 401 is fixedly sleeved with a first pulley 402, and an outer surface of the first pulley 402 is movably sleeved with a belt body 403, two rubber rollers 408 are movably embedded between the opposite inner walls of the vertical plate frame 3, and one end of the two rubber rollers 408 is fixed with a large gear 407, and the two large gears 4 The outer surfaces of 07 are meshed with pinions 406, the inner walls of the two pinions 406 are fixedly sleeved with a limit shaft 415, a reducer 405 is arranged at one end of the upper limit shaft 415, and a second pulley 404 is fixedly sleeved at the output end of the reducer 405, two first sets of rollers 412 are movably embedded between the opposite inner walls of the vertical plate frame 3 near one side edge, two second sets of rollers 413 are movably embedded between the opposite inner walls of the vertical plate frame 3 near the center, and two third sets of rollers are movably embedded between the opposite inner walls of the vertical plate frame 3 near the other side edge 414, the other end of the two rubber rollers 408, one end of the two first group pressure rollers 412, one end of the two second group pressure rollers 413 and one end of the two third group pressure rollers 414 are all provided with first sprockets 409, the outer surfaces of the two large gears 407 are meshed and connected, the eight first sprockets 409 are divided into four groups, the outer surfaces of each group of first sprockets 409 are movably embedded with first chains 411, the other ends of the two first group pressure rollers 412 and the other ends of the two second group pressure rollers 413 are all provided with second sprockets 410, the four second sprockets 410 are divided into two groups, two A second chain 416 is movably embedded between the outer surfaces of the second sprocket 410 of the group, the outer surface of the motor 401 is fixedly connected to the outer surface of the vertical plate frame 3 by screws, the inner wall of the belt body 403 is slidingly connected to the outer surface of the second pulley 404, the other ends of the two limit shafts 415 are rotatably connected to the inner wall of the vertical plate frame 3, a pressurizing cylinder body 5 is arranged between the outer surfaces of the two first groups of pressure rollers 412, the two second groups of pressure rollers 413 and the two third groups of pressure rollers 414, and a plurality of rollers 2 are arranged between the relative inner walls of the two vertical plate frames 3 near the top and the bottom.

[0023] In this embodiment, when the pre-pressing machine is used to process and manufacture the artificial board, the slab needs to be placed between the outer surfaces of the upper transmission belt 608 and the lower transmission belt 603, and then the multiple pressurizing cylinder bodies 5 are started to extend or shorten them, driving the slab to move forward. Figure 3The first group of pressing rollers 412, the second group of pressing rollers 413 and the third group of pressing rollers 414 shown on the upper side move upward or downward, so that the distance between the pressing rollers on the upper side and the pressing rollers on the lower side matches the thickness of the slab that needs to be pressed. By adjusting the lengths of the multiple pressurizing cylinder bodies 5, the heavy-duty oriented structural plate pre-pressing machine can be adjusted according to different material and product requirements to achieve different pressing effects. It has the characteristics of strong flexibility, convenient adjustment and wide adaptability. Then, the motor 401 is started to drive the first pulley 402 to rotate, and then the belt body 403 is driven to rotate along the second pulley 404 and the first pulley 402. During the rotation of the second pulley 404, the speed is adjusted by the reducer 405 and then output, driving the pinion 406 to rotate. The reducer 405 is a mechanical device for reducing the output speed of the motor and increasing the output torque. The input end of the reducer 405 is connected to the second pulley 404. The second pulley 404 transmits its rotational kinetic energy to the reducer 405 during operation. The output end of the reducer 405 is connected to the limit shaft 415. After the transmission of the reducer 405, the output speed is reduced and the torque is increased, thereby adjusting the speed of the limit shaft 415. The rotation of the small gear 406 drives the two large gears 407 to rotate in the opposite direction, and then drives the rubber rollers 408 on the upper and lower sides to rotate in the opposite direction. The rotation of the rubber roller 408 on the upper side drives the first sprocket 409 connected thereto to rotate, and then drives the first chain 411 connected thereto to rotate. The first chain 411 The rotation drives the rotation of another first sprocket 409 matched with it, thereby causing the first group of pressure rollers 412 located on the upper side to rotate, thereby causing the second sprocket 410 corresponding to the first group of pressure rollers 412 to rotate, thereby causing the second chain 416 corresponding to the second sprocket 410 to rotate, thereby driving the second sprocket 410 connected to the second group of pressure rollers 413 located on the upper side to rotate, thereby driving the second group of pressure rollers 413 located on the upper side to rotate, thereby causing the first sprocket 409 corresponding to the second group of pressure rollers 413 to rotate, thereby causing the first chain 411 matched with the first sprocket 409 to rotate, and the rotation of the first chain 411 drives the first sprocket 409 corresponding to the third group of pressure rollers 414 to rotate, thereby realizing the upper side. The rotation of the third group of pressing rollers 414, and similarly, the rotation of the rubber roller 408 located on the lower side, and the rotation of the first group of pressing rollers 412, the second group of pressing rollers 413 and the third group of pressing rollers 414 located on the lower side, thereby realizing the rotation of each pressing roller in the pre-pressing machine, driving the slab to be pressurized to be pressurized inside the pre-pressing machine and move forward, thereby realizing the pressurization of the slab. Through the design of three groups of pressurizing rollers, the pressurization length of the heavy-duty pre-pressing machine exceeds that of similar products in the industry, and it has a very good pre-pressing effect and a good compacting effect. The front and rear pressing rollers are chain-driven to ensure the synchronization of the three groups of pressing rollers, while reducing bubbles and surface cracks, effectively preventing the slab from breaking and breaking during the pre-pressing process, improving the overall quality of the artificial board, and making the artificial board molding more stable.It provides a strong guarantee for more efficient operation of the production line and obtaining better quality finished boards.

[0024] like Figure 3 As shown, a pre-stressing assembly 6 is arranged inside the vertical plate frame 3, and the pre-stressing assembly 6 includes a lower belt deflection adjusting device 601. The outer surface of the lower belt deflection adjusting device 601 is fixedly connected to the inner wall of the vertical plate frame 3 by screws. A lower belt tensioning roller 602 is arranged on the inner wall of the vertical plate frame 3. A first tensioning cylinder 604 is arranged near one side edge of the inner wall of the vertical plate frame 3. A first pre-stressing roller group 605 is movably embedded near the bottom between the relative inner walls of the vertical plate frame 3. A lower transmission belt 603 is arranged between the outer surfaces of a plurality of rollers 2 located at the bottom. The lower belt deflection adjusting device 601, the lower belt tensioning roller 602, the first pre-stressing roller group 605, the first group of pressure rollers 412 located at the lower side, the second group of pressure rollers 413 located at the lower side, the third group of pressure rollers 414 located at the lower side and the rubber roller 408 located at the lower side are arranged. The outer surfaces thereof all slide with the outer surface of the lower transmission belt 603, an upper belt deviation adjusting device 606 is arranged near the top of the inner wall of the vertical plate frame 3, an upper belt tensioning roller 607 is arranged on the inner wall of the vertical plate frame 3, a second tensioning cylinder 609 is arranged on the inner wall of the vertical plate frame 3, a second pre-pressing roller group 610 is movably embedded between the relative inner walls of the vertical plate frame 3 near the top, an upper transmission belt 608 is arranged on the outer surface of the upper belt deviation adjusting device 606, the outer surfaces of the upper belt tensioning roller 607, the second pre-pressing roller group 610, the first group of pressure rollers 412 located on the upper side, the second group of pressure rollers 413 located on the upper side, the third group of pressure rollers 414 located on the upper side and the rubber roller 408 located on the upper side all slide with the outer surface of the upper transmission belt 608, and a pre-pressing roller pressure cylinder 7 is arranged near the top of the inner wall of the vertical plate frame 3.

[0025] In this embodiment, during the process of the pre-pressing machine pressing the slab, the rotation of the three groups of pressure rollers also drives the upper transmission belt 608 and the lower transmission belt 603 to rotate respectively. The lower belt deviation adjustment device 601 and the upper belt deviation adjustment device 606 ensure the stability of the upper and lower belt operations. The lower belt deviation adjustment device 601 and the upper belt deviation adjustment device 606 are equipped with sensors. When the belt deviates from the predetermined running track, the sensor will detect the deviation. The deviation adjustment device will automatically adjust the position of the guide roller through the actuator and make fine adjustments on the side of the belt to guide it back to the center position. The lower belt tensioning roller 602 and the upper belt tensioning roller 607 respectively use the first tensioning oil cylinder 604 and the second tensioning oil cylinder 606. The tensioning cylinder 609 can ensure the tensioning force of the upper and lower belts, wherein the tensioning roller maintains the proper tension of the belt to prevent the belt from slipping and loosening during operation. The upper transmission belt 608 and the lower transmission belt 603 rotate to drive the first pre-pressing roller group 605 and the second pre-pressing roller group 610 to rotate. Through the pre-pressing of the two roller groups, the slab is preliminarily pre-pressed. In addition, the pre-pressing machine roller pressure cylinder 7 is used to adjust and control the pressure applied to the slab by the first pre-pressing roller group 605 and the second pre-pressing roller group 610, and can control the height of the pressing roller and the required pressure according to the requirements of the slab and the process to ensure that the material is evenly compressed during the pre-pressing process, thereby improving the quality of the product.

[0026] The use method and working principle of the device: When the pre-pressing machine is used to process and produce artificial boards, the slab needs to be placed between the outer surfaces of the upper transmission belt 608 and the lower transmission belt 603, and then the multiple pressurized oil cylinder bodies 5 are started to extend or shorten them, driving the Figure 3The first group of pressing rollers 412, the second group of pressing rollers 413 and the third group of pressing rollers 414 shown on the upper side move upward or downward, so that the distance between the pressing rollers on the upper side and the pressing rollers on the lower side matches the thickness of the slab to be pressed, and then the motor 401 is started to drive the first pulley 402 to rotate, thereby driving the belt body 403 to rotate along the second pulley 404 and the first pulley 402. During the rotation of the second pulley 404, the speed is adjusted by the speed reducer 405 and then output, driving the small gear 406 to rotate, and then driving the two large gears 407 to rotate in the opposite direction, thereby driving the rubber rollers 408 on the upper and lower sides to rotate in the opposite direction. The rubber roller 408 on the upper side rotates, and the rotation of the rubber roller 408 drives the first sprocket 409 connected thereto to rotate, and then drives the first chain 411 connected thereto to rotate. The rotation of the first chain 411 drives the rotation of another first sprocket 409 matched thereto, and then the first group of pressure rollers 412 on the upper side rotates, thereby causing the second sprocket 410 corresponding to the first group of pressure rollers 412 to rotate, and then the second chain 416 corresponding to the second sprocket 410 rotates, and then drives the second sprocket 410 connected to the second group of pressure rollers 413 on the upper side to rotate, thereby driving the second group of pressure rollers 413 on the upper side to rotate. 13 rotates, thereby causing the first sprocket 409 corresponding to the second group of rollers 413 to rotate, thereby causing the first chain 411 matched with the first sprocket 409 to rotate, and the rotation of the first chain 411 drives the first sprocket 409 corresponding to the third group of rollers 414 to rotate, thereby realizing the rotation of the third group of rollers 414 located on the upper side, and similarly, the rotation of the rubber roller 408 located on the lower side also causes the rotation of the first group of rollers 412, the second group of rollers 413 and the third group of rollers 414 located on the lower side, thereby realizing the rotation of each roller in the pre-pressing machine, thereby driving the slab to be pressed to be pressed inside the pre-pressing machine. The slab is pressed and moved forward, wherein the rotation of the three groups of pressure rollers also drives the upper transmission belt 608 and the lower transmission belt 603 to rotate respectively. The lower belt deviation adjustment device 601 and the upper belt deviation adjustment device 606 ensure the stability of the upper and lower belt operations. The lower belt tensioning roller 602 and the upper belt tensioning roller 607 respectively use the first tensioning cylinder 604 and the second tensioning cylinder 609 to ensure the tensioning force of the upper and lower belts. The rotation of the upper transmission belt 608 and the lower transmission belt 603 drives the rotation of the first pre-pressing roller group 605 and the second pre-pressing roller group 610. Through the pre-pressing of the two groups of rollers, the slab is preliminarily pre-pressed.

[0027] The wiring diagram of the motor 401, the pressure cylinder body 5, the first tensioning cylinder 604, the second tensioning cylinder 609 and the pre-pressing roller pressure cylinder 7 in the present invention is common knowledge in the field, and its working principle is a well-known technology. The model is selected according to the actual use, so the control method and wiring layout of the motor 401, the pressure cylinder body 5, the first tensioning cylinder 604, the second tensioning cylinder 609 and the pre-pressing roller pressure cylinder 7 will no longer be explained in detail.

[0028] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A heavy-duty oriented structural board pre-pressing machine, comprising a base (1) and a pre-pressing assembly (6), wherein a vertical plate frame (3) is fixedly welded to the top of the base (1), and characterized in that: A driving assembly (4) is arranged inside the vertical plate frame (3), and the driving assembly (4) comprises a motor (401), an output shaft of the motor (401) is fixedly sleeved with a first belt pulley (402), an outer surface of the first belt pulley (402) is movably sleeved with a belt body (403), two rubber rollers (408) are movably embedded between opposite inner walls of the vertical plate frame (3), one end of each of the two rubber rollers (408) is fixed with a large gear (407), the outer surfaces of the two large gears (407) are meshedly connected with small gears (406), the inner walls of the two small gears (406) are fixedly sleeved with a limiting shaft (415), and one end of the limiting shaft (415) at the upper part is fixedly sleeved with a small gear (406). A reducer (405) is arranged at the end, a second pulley (404) is fixedly sleeved at the output end of the reducer (405), two first groups of pressure rollers (412) are movably embedded between the opposite inner walls of the vertical plate frame (3) near one side edge, two second groups of pressure rollers (413) are movably embedded between the opposite inner walls of the vertical plate frame (3) near the center, two third groups of pressure rollers (414) are movably embedded between the opposite inner walls of the vertical plate frame (3) near the other side edge, and first sprockets (409) are arranged at the other ends of the two rubber rollers (408), one ends of the two first groups of pressure rollers (412), one ends of the two second groups of pressure rollers (413) and one ends of the two third groups of pressure rollers (414).

2. The heavy duty oriented structural board pre-pressing machine according to claim 1, characterized in that: The outer surfaces of the two large gears (407) are meshed and connected, and the eight first sprockets (409) are divided into four groups. A first chain (411) is movably embedded between the outer surfaces of each group of the first sprockets (409).

3. The heavy duty oriented structural board pre-pressing machine according to claim 2, characterized in that: A second sprocket (410) is disposed at the other end of the two first-group pressure rollers (412) and the other end of the two second-group pressure rollers (413); the four second sprockets (410) are divided into two groups; and a second chain (416) is movably embedded between the outer surfaces of the two groups of second sprockets (410).

4. The heavy duty oriented structural board pre-pressing machine according to claim 3, characterized in that: The outer surface of the motor (401) is fixedly connected to the outer surface of the vertical plate frame (3) by means of screws, the inner wall of the belt body (403) is slidably connected to the outer surface of the second pulley (404), and the other ends of the two limit shafts (415) are both rotatably connected to the inner wall of the vertical plate frame (3).

5. The heavy duty oriented structural board pre-pressing machine according to claim 4, characterized in that: A pressurizing cylinder body (5) is disposed between the outer surfaces of the two first groups of press rollers (412), the two second groups of press rollers (413), and the two third groups of press rollers (414), and a plurality of rollers (2) are disposed between the opposite inner walls of the two vertical plate frames (3) near the top and the bottom.

6. The heavy duty oriented structural board pre-pressing machine according to claim 5, characterized in that: A pre-stressing assembly (6) is arranged inside the vertical plate frame (3), and the pre-stressing assembly (6) includes a lower belt deviation adjustment device (601). The outer surface of the lower belt deviation adjustment device (601) is fixedly connected to the inner wall of the vertical plate frame (3) by screws, and a lower belt tensioning roller (602) is arranged on the inner wall of the vertical plate frame (3).

7. The heavy duty oriented structural board pre-pressing machine according to claim 6, characterized in that: A first tensioning cylinder (604) is arranged near one side edge of the inner wall of the vertical plate frame (3), a first pre-pressing roller group (605) is movably embedded between the opposite inner walls of the vertical plate frame (3) near the bottom, and a lower transmission belt (603) is arranged between the outer surfaces of a plurality of rollers (2) located at the bottom.

8. The heavy duty oriented structural board pre-pressing machine according to claim 7, characterized in that: The outer surfaces of the lower belt deviation adjustment device (601), the lower belt tensioning roller (602), the first pre-pressing roller group (605), the first group of pressing rollers (412) located on the lower side, the second group of pressing rollers (413) located on the lower side, the third group of pressing rollers (414) located on the lower side, and the rubber roller (408) located on the lower side all slide with the outer surface of the lower transmission belt (603).

9. The heavy duty oriented structural board pre-pressing machine according to claim 8, characterized in that: An upper belt deviation adjustment device (606) is arranged on the inner wall of the vertical plate frame (3) near the top, an upper belt tensioning roller (607) is arranged on the inner wall of the vertical plate frame (3), a second tensioning cylinder (609) is arranged on the inner wall of the vertical plate frame (3), a second pre-pressure roller group (610) is movably embedded between the relative inner walls of the vertical plate frame (3) near the top, and an upper transmission belt (608) is arranged on the outer surface of the upper belt deviation adjustment device (606).

10. The heavy duty oriented structural board pre-pressing machine according to claim 9, characterized in that: The outer surfaces of the upper belt tensioning roller (607), the second pre-pressing roller group (610), the first group of pressing rollers (412) located on the upper side, the second group of pressing rollers (413) located on the upper side, the third group of pressing rollers (414) located on the upper side and the rubber roller (408) located on the upper side all slide with the outer surface of the upper transmission belt (608), and a pre-pressing roller pressure cylinder (7) is provided near the top of the inner wall of the vertical plate frame (3).

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