A pneumatic paper cutting device for low-density paperboard wet blanks

Abstract

The invention relates to the technical field of insulating paperboard preparation, and discloses a pneumatic paper cutting device for low-density paperboard wet paper blanks, comprising a processing table, a wet paper forming cylinder, and a wet paperboard, wherein the wet paperboard is wound on the wet paper forming cylinder, a longitudinal cutter groove is formed in the wet paper forming cylinder, a cutter and a cleaning frame are provided in the wet paper forming cylinder, and a cleaning component is provided in the cleaning frame. The cutter cuts the wet paperboard wound to a certain thickness in the wet paper forming cylinder through the longitudinal cutter groove, and the cleaning component removes wet paper debris adhered to the surface of the wet paper forming cylinder when the wet paperboard is cut, thereby ensuring that the inner surface of the wet paperboard is smooth and has no protrusions or depressions when the wet paperboard is wound next time. The invention can effectively remove wet paper debris on the cutter surface and the wet paper forming cylinder surface after the cutter cuts the wet paperboard, thereby preventing the debris from entering the longitudinal cutter groove, preventing the residual wet paper debris from affecting the forming of the next wet paperboard, and reducing the defective rate of the wet paperboard.

Description

Technical Field

[0001] The invention relates to the technical field of insulating paperboard preparation, in particular to a pneumatic paper cutting device for low-density paperboard wet blanks. Background Art

[0002] Low-density cardboard is a key basic material for the production of insulating molded parts and their lead-out devices, corner rings and other molded parts in ultra-high and extra-high voltage oil-immersed transformers. Low-density cardboard is an insulating cardboard made from a mixture of cotton pulp fiber and wood pulp fiber, with a density of 0.85-1.05g / cm3. Low-density cardboard can significantly improve the flexibility and oil absorption of insulating molded parts, enhance the operability and assembly accuracy of the assembly process, and ensure the operational reliability of the transformer.

[0003] In the production of low-density cardboard, the wet paper forming cylinder is a key piece of equipment that winds thin paper sheets into thicker cardboard blanks. When the wet paperboard reaches a certain thickness in the forming cylinder, it requires a sharp blade to cut it. Cutting the blank before it leaves the cylinder is an essential step in the manufacturing process. Existing technology uses a hydraulic assembly to push the cutter out of an axial slot, thereby applying compressive stress to the inner circumference of the wound wet paperboard. This normal pressure, perpendicular to the surface, causes local stresses to be much higher than the average stress, resulting in high pressure and causing material fracture. As the thickness of the wet paperboard increases, the difficulty of cutting increases, making it more likely that the inner layer of wet paperboard will stick to the surface of the wet paper forming cylinder during cutting. The sticking wet paper debris will form protrusions on the forming cylinder surface, affecting the quality of the finished low-density cardboard. Summary of the Invention

[0004] The object of the present invention is to provide a pneumatic paper cutting device for low-density wet paper blanks to solve the problems raised in the above background technology.

[0005] Technical Solution

[0006] The present invention provides the following technical solution: a pneumatic paper cutting device for low-density paperboard wet paper blanks, comprising a processing table, a wet paper forming cylinder, and wet paperboard, wherein the wet paperboard is wound on the wet paper forming cylinder, a longitudinal cutter groove is formed through the wet paper forming cylinder, a cutter and a cleaning frame are provided in the wet paper forming cylinder, and a cleaning component is provided in the cleaning frame. The cutter cuts the wet paperboard wound to a certain thickness in the wet paper forming cylinder through the longitudinal cutter groove, and the cleaning component removes wet paper debris adhered to the surface of the wet paper forming cylinder when the wet paperboard is cut, thereby ensuring that the inner surface of the wet paperboard is smooth and has no protrusions or depressions when the wet paperboard is wound next time.

[0007] Preferably, the cleaning assembly includes a first cleaning brush, a second cleaning brush and a cleaning groove. After the cutter extends out of the longitudinal groove of the cutter, the first cleaning brush removes the shredded paper adhering to the surface of the cutter through the cleaning groove to prevent the shredded paper from entering the longitudinal groove of the cutter. The second cleaning brush is close to the cutter and removes wet paper debris from the surface of the wet paper forming cylinder.

[0008] Preferably, the cleaning frame is provided with a first connecting plate, a second connecting plate and a second movable plate, the bottom end of the first connecting plate is fixedly connected to the first cleaning brush, and the bottom end of the second connecting plate is fixedly connected to the second cleaning brush via a connecting rod.

[0009] Preferably, a second limiting plate and a limiting tooth plate are respectively provided on both sides of the second movable plate. The second limiting plate is in an inclined shape and contacts the second connecting plate. The first connecting plate contacts the second movable plate through the limiting tooth plate.

[0010] Preferably, the clearing frame is also provided with a first motor, a second motor, a rotating gear, a push rod and an extrusion plate, the second movable plate is located on the first motor through the second screw, the second motor sets the first movable plate through the first screw, and the first movable plate is in sliding contact with the first connecting plate.

[0011] Preferably, the bottom end of the extrusion plate and the top end of the push rod are both provided with connecting tooth plates, and both connecting tooth plates are engaged with the rotating gear, a first extrusion spring is provided on the side of the push rod, and the extrusion plate is located below the first movable plate and is provided with a second extrusion spring.

[0012] Preferably, a sliding plate is provided on the inner wall of the cleaning frame, a first limiting plate is provided in the sliding plate and passes through the connecting rod, and the pushing rod is in contact with the connecting rod.

[0013] Preferably, the wet paper forming cylinder is provided with a blowing hole, which is located below the cleaning frame and below the longitudinal groove of the cutter.

[0014] Preferably, a hydraulic cylinder is provided in the wet paper forming cylinder, the hydraulic cylinder is fixedly connected to the cutter, and a gear column is also provided in the wet paper forming cylinder, the gear column extends out of the wet paper forming cylinder.

[0015] Preferably, a rotating assembly is provided outside the wet paper forming cylinder, and the gear column adjusts the position of the cleaning frame through the rotating assembly. The rotating assembly includes a rotating shaft and a rotating gear, and the gear column is meshed with the rotating gear.

[0016] Beneficial effects

[0017] Compared with the prior art, the present invention provides a pneumatic paper cutting device for low-density wet paperboard blanks, which has the following beneficial effects:

[0018] 1. In the present invention, the cleaning component in the cleaning frame can effectively remove wet paper debris on the cutter surface and the wet paper forming cylinder surface after the cutter cuts the wet paper board, preventing the debris from entering the cutter longitudinal groove, ensuring that the inner surface of the wet paper board is smooth and free of protrusions and depressions when the wet paper board is wound next time.

[0019] 2. In the present invention, the first cleaning brush and the second cleaning brush are used to clean the wet paper on the cutter and the surface of the wet paper forming cylinder between the longitudinal groove of the cutter and the air blowing hole, so as to prevent the residual wet paper debris from affecting the forming of the next wet paper board and reduce the defective rate of the wet paper board.

[0020] It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0021] This application document provides an overview of various implementations or examples of the technology described in this disclosure, and is not a comprehensive disclosure of the full scope or all features of the disclosed technology. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are only some embodiments described in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0023] Figure 1 This is a diagram of the low-density paperboard wet blank being wound on a wet paper forming cylinder;

[0024] Figure 2 This is a schematic diagram of a low-density paperboard wet blank being cut by a cutter on a wet paper forming cylinder according to the present invention;

[0025] Figure 3 This is a cross-sectional view of a low-density paperboard wet blank in a wet paper forming cylinder according to the present invention;

[0026] Figure 4 This is a partial schematic diagram of the wet paper forming cylinder of the present invention;

[0027] Figure 5 For the present invention Figure 2 Enlarged view of point A in the middle;

[0028] Figure 6 For the present invention Figure 5 Schematic diagram of the middle cutter extending into the longitudinal cutter slot;

[0029] Figure 7 For the present invention Figure 4 Enlarged view of point C in the middle;

[0030] Figure 8 For the present invention Figure 3 Enlarged view of point B in the middle;

[0031] Figure 9 It is a schematic diagram of a clear block diagram of the present invention;

[0032] Figure 10 For the present invention Figure 9Clear the inside of the frame at medium AA perspective Figure 1 ;

[0033] Figure 11 For the present invention Figure 9 Clear the inside of the frame at medium AA perspective Figure 2 ;

[0034] Figure 12 Clear the interior of the frame for this invention;

[0035] Figure 13 For the present invention Figure 12 Enlarged view of point D in the middle;

[0036] Figure 14 For the present invention Figure 9 Schematic diagram of the middle BB perspective;

[0037] Figure 15 This is a schematic diagram of the cleaning component of the present invention before it starts working.

[0038] Description of reference numerals:

[0039] In the figure: 1. processing table; 2. rotating motor; 3. wet paper forming cylinder; 4. wet paper board; 5. cleaning frame; 6. hydraulic cylinder; 7. cutter; 8. tooth column; 9. rotating assembly; 10. blowing hole; 11. longitudinal groove of cutter; 12. first cleaning brush; 13. second cleaning brush; 14. cleaning groove; 15. first motor; 16. second motor; 17. first lead screw; 18. second lead screw; 19. first connecting plate; 20. second connecting plate; 21. sliding plate; 22. connecting rod; 23. rotating gear; 24. first movable plate; 25. second movable plate; 26. pushing rod; 27. first limiting plate; 28. extrusion plate; 29. ​​first extrusion spring; 30. second limiting plate; 31. limiting tooth plate; 32. second extrusion spring. DETAILED DESCRIPTION

[0040] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments 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 making creative efforts are within the scope of protection of the present invention.

[0041] Example:

[0042] See also Figures 1-15The present invention provides a technical solution: a pneumatic paper cutting device for low-density paperboard wet paper blanks, comprising a processing table 1, a rotating motor 2, a wet paper forming cylinder 3, and a wet paper board 4. The rotating motor 2 is connected to the wet paper forming cylinder 3 and can drive the wet paper forming cylinder 3 to rotate. The rotation speed of the rotating motor 2 is adjusted to ensure that the wet paper board 4 is wound slowly on the wet paper forming cylinder 3, ensure the stability of the wet paper board 4 during winding, and prevent the wet paper board 4 from breaking. The wet paper board 4 is conveyed by a conveyor belt and wound on the wet paper forming cylinder 3. A longitudinal cutter groove 11 is formed in the wet paper forming cylinder 3. A cutter 7 is installed inside the wet paper forming cylinder 3, and a cleaning frame 5 is movably installed on the outside. A cleaning component is provided in the cleaning frame 5. The cutter 7 cuts the wet paper board 4 wound to a certain thickness in the wet paper forming cylinder 3 through the longitudinal cutter groove 11. The cleaning component removes wet paper debris adhered to the surface of the wet paper forming cylinder 3 when the wet paper board 4 is cut, ensuring that the inner surface of the wet paper board 4 is smooth and free of protrusions and depressions when the wet paper board 4 is wound next time.

[0043] When the cleaning frame 5 is not working, it is located on the side of the wet paper forming cylinder 3 and has no contact with the wet paper board 4. When the cutter 7 extends through the cutter longitudinal groove 11 to cut the wet paper board 4, the cleaning frame 5 will move to the wet paper board 4 through the rotating component 9. At the same time, when the cutter 7 cuts, the cleaning frame 5 will not be affected by the processing table 1 and cannot move, that is, the cutting position of the wet paper board 4 is as follows: Figure 2 Clear the box near position 5.

[0044] In this embodiment, the cleaning component includes a first cleaning brush 12, a second cleaning brush 13 and a cleaning groove 14. After the cutter 7 extends out of the cutter longitudinal groove 11, the first cleaning brush 12 removes the shredded paper adhering to the surface of the cutter 7 through the cleaning groove 14 to prevent the shredded paper from entering the cutter longitudinal groove 11. The second cleaning brush 13 is close to the cutter 7 and removes wet paper debris from the surface of the wet paper forming cylinder 3.

[0045] After the cutter 7 extends out of the cutter longitudinal groove 11, it is located between the first cleaning brush 12 and the second cleaning brush 13. The first cleaning brush 12 and the second cleaning brush 13 will cooperate to remove the wet paper debris on the cutter 7. The second cleaning brush 13 is L-shaped, and the other end of the second cleaning brush 13 will be in close contact with the surface of the wet paper forming cylinder 3. During the movement, the second cleaning brush 13 will remove the wet paper debris remaining in the area between the cutter longitudinal groove 11 and the blowing hole 10.

[0046] Before the wet paper board 4 leaves the cylinder, the cutter 7 reaches the cutting position and cuts the wet paper board 4. The cut end of the wet paper board 4 will fall onto the conveyor belt under the action of the air blowing hole 10, while the other end will continue to stay on the wet paper forming cylinder 3. The cleaning frame 5 will clamp this end on the wet paper forming cylinder 3 to prevent the wet paper board 4 at this end from falling and damaging the wet paper board 4 during continued rotation.

[0047] In this embodiment, a first connecting plate 19, a second connecting plate 20 and a second movable plate 25 are movably installed in the cleaning frame 5. The bottom end of the first connecting plate 19 is fixedly connected to the first cleaning brush 12, and the bottom end of the second connecting plate 20 is fixedly connected to the second cleaning brush 13 via a connecting rod 22. When the second movable plate 25 moves, it can drive the first connecting plate 19 and the second connecting plate 20 to move along the wet paper forming cylinder 3 in the cleaning frame 5, thereby driving the first cleaning brush 12 and the second cleaning brush 13 to clean the cutter 7 and the wet paper on the surface of the wet paper forming cylinder 3 between the cutter longitudinal groove 11 and the air blowing hole 10, thereby preventing residual wet paper debris from affecting the forming of the next wet paper board 4, and preventing the inner surface of the next wet paper board 4 from having protrusions or grooves after forming, thereby reducing the defective rate of the wet paper board 4.

[0048] In this embodiment, a second limit plate 30 and a limit tooth plate 31 are fixedly installed on both sides of the second movable plate 25. The second limit plate 30 is fixedly installed on the side of the second movable plate 25 at an angle. The interior of the second connecting plate 20 is provided with an inclined connecting groove matching the second limit plate 30. The first connecting plate 19 contacts the second movable plate 25 through the limit tooth plate 31. The bottom end of the first connecting plate 19 is provided with a limit connecting groove matching the limit tooth plate 31. When the first connecting plate 19 moves downward, it will be connected to the limit tooth plate 31 and the second movable plate 25 through the limit connecting groove.

[0049] In this embodiment, the clearing frame 5 also includes a first motor 15, a second motor 16, and a rotating gear 23, a push rod 26 and an extrusion plate 28, which are movably installed. The second movable plate 25 is located on the first motor 15 through the second lead screw 18. The second motor 16 sets the first movable plate 24 through the first lead screw 17. The first movable plate 24 is in sliding contact with the first connecting plate 19. The first connecting plate 19 is movably connected to the first movable plate 24 through a card slot provided on the side, and the first connecting plate 19 can slide on the first movable plate 24. The extrusion plate 28 is located below the second lead screw 18 and does not contact the second lead screw 18. The extrusion plate 28 will not hinder the operation of the second lead screw 18.

[0050] In this embodiment, a connecting tooth plate is provided at the bottom end of the extrusion plate 28 and the top end of the push rod 26, and the two connecting tooth plates are meshed with the rotating gear 23. A first extrusion spring 29 is fixedly installed on the side of the push rod 26. The extrusion plate 28 is located below the first movable plate 24 and is fixedly installed with a second extrusion spring 32. When the first movable plate 24 moves downward, it will drive the extrusion plate 28 to move downward. At the same time, the extrusion plate 28 will squeeze the second extrusion spring 32, and will drive the connecting tooth plate to drive the push rod 26 to move toward the side of the second movable plate 25. When the push rod 26 moves, it will squeeze the first extrusion spring 29. At the same time, the push rod 26 will also push the connecting rod 22 to slide horizontally in the sliding plate 21, and the push rod 26 and the connecting rod 22 are in sliding contact.

[0051] In this embodiment, a sliding plate 21 is movably installed on the inner wall of the clearing frame 5, and a first limit plate 27 is fixedly installed in the sliding plate 21 and passes through the connecting rod 22. The push rod 26 is in contact with the connecting rod 22, and the first limit plate 27 is inclined in the sliding plate 21. When the connecting rod 22 moves toward the side of the second movable plate 25 in the sliding plate 21, the connecting rod 22 will move with the first limit plate 27.

[0052] The length of the first movable plate 24 and the push rod 26 is the same as the length of the cleaning frame 5 .

[0053] In this embodiment, a blowing hole 10 is formed through the wet paper forming cylinder 3. The blowing hole 10 is located below the cleaning frame 5 and below the cutter longitudinal groove 11. An air pump is provided in the wet paper forming cylinder 3 and is connected to the blowing hole 10. When the wet paper board 4 on the wet paper forming cylinder 3 is cut, the blowing hole 10 will blow the wet paper board 4 away from the surface of the wet paper forming cylinder 3.

[0054] In this embodiment, a hydraulic cylinder 6 is fixedly installed in the wet paper forming cylinder 3, and the hydraulic cylinder 6 is fixedly connected to the cutter 7. In addition, a gear column 8 is movably installed in the wet paper forming cylinder 3. The gear column 8 is also installed on the output shaft of the hydraulic cylinder 6, and the gear column 8 extends out of the wet paper forming cylinder 3.

[0055] In this embodiment, a rotating assembly 9 is provided on the outside of the wet paper forming cylinder 3, and the gear column 8 adjusts the position of the cleaning frame 5 through the rotating assembly 9. The rotating assembly 9 includes a rotating shaft and a rotating gear. The gear column 8 is meshed with the rotating gear. One end of the rotating shaft is fixedly connected to the cleaning frame 5, and the other end is fixedly connected to the rotating gear. When not in use, the cleaning frame 5 is tightly attached to the side wall of the wet paper forming cylinder 3, blocking the through hole on the side of the wet paper forming cylinder 3, and blocking the cutter longitudinal groove 11 together, thereby protecting the cutter 7 and increasing the safety of the staff.

[0056] An observation window is provided on the side wall of the wet paper forming cylinder 3 for observing the internal parts of the wet paper forming cylinder 3 and for maintenance.

[0057] When the cutter 7 cuts the wet paperboard 4, a tail layer scraping device is arranged behind it to scrape the wet paperboard on the conveyor belt at the same time. The length between the position where the wet paperboard 4 is cut by the cutter 7 and the position where the tail layer is scraped off is equal to the circumference of the wet paper forming cylinder 3, which is the outermost layer of the wet paperboard 4.

[0058] The working principle of this embodiment is as follows: when in use, the rotating motor 2 drives the wet paper forming cylinder 3 to rotate, and the wet paper blank is wound on the wet paper forming cylinder 3. When the wet paper board 4 reaches a certain thickness, the cutter 7 needs to cut the wet paper board 4. At this time, the hydraulic cylinder 6 will work, and the hydraulic cylinder 6 will drive the cutter 7 to extend through the cutter longitudinal groove 11 and cut the wet paper board 4. The compressed air will be blown out from the blowing hole 10 to blow the end of the wet paper board 4 that has lost its support and attached to the surface of the wet paper forming cylinder 3 onto the conveyor belt. At the same time as the hydraulic cylinder 6 is working, it will also drive the gear column 8 to move. When the gear column 8 moves, it will rotate the component 9 to drive the cleaning frame 5 to rotate. The cleaning frame 5 will rotate and be located outside the wet paper board 4. The cleaning frame 5 will fasten the other end of the wet paper board 4 to the surface of the wet paper forming cylinder 3 to prevent the wet paper board 4 at this end from separating from the surface of the wet paper forming cylinder 3 during rotation, thereby ensuring the integrity of the wet paper board 4.

[0059] When the cleaning frame 5 reaches the cleaning position, the second motor 16 in the cleaning frame 5 works first and drives the first movable plate 24 to move downward through the first lead screw 17. When the first movable plate 24 moves, it will drive the first connecting plate 19 to move downward together. After the first connecting plate 19 moves downward, it will engage with the second movable plate 25 through the limiting tooth plate 31. At the same time, the first connecting plate 19 will drive the first cleaning brush 12 to extend out of the cleaning frame 5 and contact with the cutter 7. Moreover, when the first movable plate 24 moves downward, it will also drive the extrusion plate 28 to move downward together. When the extrusion plate 28 moves downward, it will squeeze the second extrusion spring 32. At the same time, the extrusion plate 28 will also engage with the second extrusion spring 32 through the connecting tooth plate The cooperation of the rotating gear 23 drives the pushing rod 26 to move toward the side of the second movable plate 25. When the pushing rod 26 moves, it drives the connecting rod 22 to move in the same direction, and the connecting rod 22 moves with the first limiting plate 27. When the connecting rod 22 moves, it drives the top second connecting plate 20 to engage with the second limiting plate 30 on the second movable plate 25. At the same time, when the connecting rod 22 moves, it drives the second cleaning brush 13 at the bottom end to approach the first cleaning brush 12. One side of the first cleaning brush 12 and the second cleaning brush 13 will cover the surface of the cutter 7, and the other part of the second cleaning brush 13 will contact the wet brush between the cutter longitudinal groove 11 and the blowing hole 10. The surface of the paper forming cylinder 3 is in contact with the first motor 15 and the second lead screw 18. The second movable plate 25 will move in the cleaning frame 5. When the second movable plate 25 moves, it will drive the first connecting plate 19 and the second connecting plate 20 on both sides to move together. Since the second connecting plate 20 is movably installed in the sliding plate 21 through the connecting rod 22 and the second limiting plate 30, the first cleaning brush 12 and the second cleaning brush 13 will move together with the second movable plate 25. During the movement, the first cleaning brush 12 and the second cleaning brush 13 will clean the wet paper debris remaining on the surface of the cutter 7 and the surface of the wet paper forming cylinder 3. The cutter 7 is prevented from bringing wet paper debris into the cutter longitudinal groove 11, and wet paper debris is prevented from remaining on the surface of the wet paper forming cylinder 3, which affects the forming of the next wet paper board 4. The inner surface of the next wet paper board 4 is ensured to be smooth, and wet paper debris is avoided from remaining on the inner surface of the wet paper board 4. When cleaning is completed, the first cleaning brush 12 and the second cleaning brush 13 return to their original positions, the hydraulic cylinder 6 retracts, driving the cutter 7 back to the cutter longitudinal groove 11, and the cleaning frame 5 returns to its original position, close to the side of the wet paper forming cylinder 3, and covers the observation window on the side of the wet paper forming cylinder 3 and the cutter longitudinal groove 11, thereby ensuring the safety of the staff and increasing the safety of the machine.

[0060] The above description is merely illustrative of certain exemplary embodiments of the present invention. It goes without saying that those skilled in the art will be able to modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the scope of protection of the claims.

Claims

1. A pneumatic paper cutting device for low-density paperboard wet blanks, comprising a processing table (1), a wet paper forming cylinder (3), and a wet paperboard (4), wherein the wet paperboard (4) is wound around the wet paper forming cylinder (3), and is characterized in that: A cutter longitudinal groove (11) is provided through the wet paper forming cylinder (3), a cutter (7) and a cleaning frame (5) are provided in the wet paper forming cylinder (3), and a cleaning component is provided in the cleaning frame (5). The cutter (7) cuts the wet paper board (4) wound to a certain thickness in the wet paper forming cylinder (3) through the cutter longitudinal groove (11), and the cleaning component removes wet paper debris adhering to the surface of the wet paper forming cylinder (3) when the wet paper board (4) is cut, thereby ensuring that the inner surface of the wet paper board (4) is smooth and has no protrusions or depressions when the wet paper board (4) is wound next time. The cleaning component includes a first cleaning brush (12), a second cleaning brush (13) and a cleaning groove (14). After the cutter (7) extends out of the cutter longitudinal groove (11), the first cleaning brush (12) removes the shredded paper adhering to the surface of the cutter (7) through the cleaning groove (14) to prevent the shredded paper from entering the cutter longitudinal groove (11). The second cleaning brush (13) is close to the cutter (7) and removes wet paper debris on the surface of the wet paper forming cylinder (3). The cleaning frame (5) is provided with a first connecting plate (19), a second connecting plate (20) and a second movable plate (25); the bottom end of the first connecting plate (19) is fixedly connected to the first cleaning brush (12), and the bottom end of the second connecting plate (20) is fixedly connected to the second cleaning brush (13) via a connecting rod (22); The clearing frame (5) is further provided with a first motor (15), a second motor (16), a rotating gear (23), a push rod (26) and an extrusion plate (28). The second movable plate (25) is located on the first motor (15) via a second lead screw (18). The second motor (16) sets the first movable plate (24) via a first lead screw (17). The first movable plate (24) is in sliding contact with the first connecting plate (19).

2. The pneumatic paper cutting device for low-density wet paperboard according to claim 1, characterized in that: A second limiting plate (30) and a limiting tooth plate (31) are respectively provided on both sides of the second movable plate (25); the second limiting plate (30) is in an inclined state and contacts the second connecting plate (20); and the first connecting plate (19) contacts the second movable plate (25) via the limiting tooth plate (31).

3. The low-density paperboard wet blank pneumatic cutting device according to claim 1, characterized in that: The bottom end of the extrusion plate (28) and the top end of the push rod (26) are both provided with connecting tooth plates, and both connecting tooth plates are meshed and connected with the rotating gear (23). A first extrusion spring (29) is provided on the side of the push rod (26). The extrusion plate (28) is located below the first movable plate (24) and is provided with a second extrusion spring (32).

4. The pneumatic paper cutting device for low-density wet paperboard according to claim 3, characterized in that: The inner wall of the cleaning frame (5) is provided with a sliding plate (21), a first limiting plate (27) is provided in the sliding plate (21) and passes through the connecting rod (22), and the pushing rod (26) is in contact with the connecting rod (22).

5. The pneumatic paper cutting device for low-density wet paperboard according to claim 1, characterized in that: The wet paper forming cylinder (3) is provided with an air blowing hole (10), which is located below the cleaning frame (5) and below the cutter longitudinal groove (11).

6. The pneumatic paper cutting device for low-density wet paperboard according to claim 1, characterized in that: The wet paper forming cylinder (3) is provided with a hydraulic cylinder (6), the hydraulic cylinder (6) is fixedly connected to the cutter (7), and the wet paper forming cylinder (3) is also provided with a tooth column (8), which extends out of the outside of the wet paper forming cylinder (3).

7. The pneumatic paper cutting device for low-density wet paperboard according to claim 6, characterized in that: A rotating assembly (9) is provided on the outside of the wet paper forming cylinder (3), and the gear column (8) adjusts the position of the cleaning frame (5) through the rotating assembly (9). The rotating assembly (9) includes a rotating shaft and a rotating gear, and the gear column (8) is meshed with the rotating gear.

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