Blanking device for building board production

Abstract

The invention relates to the technical field of building board production, in particular to a blanking device for building board production, which comprises a table body, a hydraulic cylinder is fixedly mounted on the upper surface of a placement plate, a rectangular block is fixedly mounted on the upper surface of the table body, a push plate is fixedly mounted at one end of each of two sliding rods, and a mounting block is fixedly mounted at the other end of each of the two sliding rods. The sliding rod is sleeved with a telescopic spring, an inclined rod is fixedly installed on the upper surface of the push plate, and a discharging groove is formed in the upper surface of the table body. The side wall of the bottom end of a driving shaft of the hydraulic cylinder is fixedly provided with an abutting rod, the upper surface of the inclined rod is provided with a penetrating opening, the opening wall of the penetrating opening is horizontally provided with a round opening, a rotating shaft is rotatably installed in the round opening, the rotating shaft is fixedly sleeved with an inclined plate, and the lower surface of the inclined rod is provided with a rotation limiting opening. Compared with the prior art, the automatic blanking device has the advantages that stamped materials can be automatically blanked, manual unloading is not needed, potential safety hazards of manual unloading are avoided, the workload and the labor intensity of operators are relieved, and the working efficiency of blanking is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of building board production, and particularly relates to a blanking device for building board production. Background Art

[0002] In the production of building boards, it is often necessary to process materials by stamping. At present, a combination of manual and mechanical methods is mostly used. First, the materials to be stamped are manually placed under the punching die block, and then mechanical stamping is carried out. Then, the materials after stamping are manually unloaded.

[0003] As much material as is stamped needs to be manually unloaded. The working burden and labor intensity of the operators are relatively large, and there are also certain safety hazards in manual blanking, and the blanking efficiency is also low. Summary of the Invention

[0004] The purpose of the present invention is to solve the following disadvantages in the prior art: as much material as is stamped needs to be manually unloaded, the working burden and labor intensity of the operators are relatively large, and there are also certain safety hazards in manual blanking, and the blanking efficiency is also low. A blanking device for building board production is proposed.

[0005] In order to achieve the above purpose, the present invention adopts the following technical scheme:

[0006] A blanking device for building board production includes a table body. An L-shaped placement plate is fixedly installed on the upper surface of the table body. A hydraulic cylinder is fixedly installed on the upper surface of the placement plate. The driving shaft of the hydraulic cylinder passes through the placement plate and is fixedly installed with a punching die block. A rectangular block is fixedly installed on the upper surface of the table body. Sockets are symmetrically opened on the surface of the rectangular block. Slide rods are slidably inserted into the sockets. One ends of the two slide rods are fixedly installed with a push plate, and the other ends are fixedly installed with mounting blocks. A telescopic spring is sleeved on the slide rod. The two ends of the telescopic spring are respectively fixedly connected with the mounting block and the rectangular block. An inclined rod is fixedly installed on the upper surface of the push plate. A discharge groove is opened on the upper surface of the table body;

[0007] A U-shaped abutting rod is fixedly installed on the side wall at the bottom end of the driving shaft of the hydraulic cylinder. A through hole for the end of the abutting rod to pass through is opened on the upper surface of the inclined rod. A circular hole is horizontally opened on the wall of the through hole. A rotating shaft is rotatably installed in the circular hole. An inclined plate is fixedly sleeved on the rotating shaft. One end of the rotating shaft located outside the through hole is fixedly installed with a placement block. The placement block is connected with the inclined rod through an elastic member. A limit rotation hole is opened on the lower surface of the inclined rod. The surface of the inclined plate abuts against the wall of the limit rotation hole. The limit rotation hole is used to limit the upward rotation of the end of the inclined plate away from the rotating shaft.

[0008] Preferably, the elastic member includes a torsion spring sleeved on the rotating shaft. The two ends of the torsion spring are respectively fixedly connected with the placement block and the inclined rod.

[0009] Preferably, a fixing cylinder is fixedly installed on the upper surface of the placement plate. A hollow tube with a closed end is fixedly installed inside the fixing cylinder. The closed end of the hollow tube is connected to the inside of the housing of the hydraulic cylinder through an intake pipe. A piston rod is slidably and sealingly inserted into the hollow tube. An exhaust pipe is fixedly installed on the surface of the hollow tube. Check valves are provided in both the exhaust pipe and the intake pipe. The piston rod is controlled to move through a connecting component.

[0010] Preferably, the connecting component includes a vertical plate fixedly installed on the upper surface of the mounting block. The surface of the vertical plate is fixedly connected to one end of the piston rod.

[0011] Preferably, the conducting direction of the check valve in the intake pipe is from the inside of the housing of the hydraulic cylinder to the inside of the hollow tube, and the conducting direction of the check valve in the exhaust pipe is from the inside of the hollow tube to the outside.

[0012] Preferably, a rectangular groove is formed on the surface of the frustum. A through hole is formed in the top wall of the rectangular groove. A hollow rod with a closed bottom end is vertically fixedly installed in the through hole. A suction cup is fixedly installed at the open top end of the hollow rod. The suction cup is located below the punching module, and the horizontal height of its upper surface is lower than the horizontal height of the upper surface of the push plate. A rotating hole is formed at the closed bottom end of the hollow rod. Vent holes are formed on the surface of the hollow rod. A rotating shaft is sealingly rotatably installed in the rotating hole. One end surface of the rotating shaft located inside the hollow rod is fixedly installed with a blocking plate for covering the vent hole through a connecting rod. The rotating shaft is controlled to rotate through a threaded component.

[0013] Preferably, the threaded component includes a threaded sleeve. Threads are formed on the surface of one end of the rotating shaft located outside the hollow rod. The threaded sleeve is threadedly sleeved on the rotating shaft. A transverse plate is fixedly sleeved on the threaded sleeve. The transverse plate is connected to the groove wall of the rectangular groove through a telescopic component. A stress plate is fixedly installed at the bottom end of the threaded sleeve. A circular hole communicating with the rectangular groove is formed on the upper surface of the frustum. A vertical rod is vertically fixedly installed on the lower surface of the abutting rod. The vertical rod corresponds to the position of the circular hole.

[0014] Preferably, the telescopic component includes two spring rods. The two ends of the spring rods are respectively fixedly connected to the lower surface of the stress plate and the bottom of the rectangular groove.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] 1. By utilizing the vertical reciprocating movement of the punching die block during the stamping process and its cooperation with the inclined rod, the abutting rod, and the inclined plate, when the stamping is completed and the punching die block moves upward, the push plate can push the stamped material into the discharge chute, thus completing automatic blanking. This eliminates the need for manual blanking, avoids the safety hazards of manual blanking, reduces the workload and labor intensity of the operators, and improves the working efficiency of blanking.

[0017] 2. Before stamping, the material needs to be placed on the upper surface of the table body and below the punching die block. The suction cup will adsorb the material to position it, preventing the material from shifting during stamping. When the stamping is completed, the suction of the suction cup on the material will be automatically released, facilitating the push plate to push out the stamped material.

[0018] 3. When the push plate moves horizontally, the hot air in the hydraulic cylinder housing will be intermittently sucked to the outside, achieving a heat dissipation effect and preventing the temperature from being too high due to the accumulation of a large amount of hot air in the hydraulic cylinder housing, which may affect the normal operation of the hydraulic cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 FIG. 1 is a front three-dimensional structural schematic diagram of a blanking device for building board production proposed by the present invention;

[0020] Figure 2 FIG. 2 is a top three-dimensional structural schematic diagram of a blanking device for building board production proposed by the present invention;

[0021] Figure 3 FIG. 3 is a three-dimensional structural schematic diagram of the inclined rod in a blanking device for building board production proposed by the present invention;

[0022] Figure 4 FIG. 4 is a three-dimensional structural schematic diagram of the push plate, rectangular block, and mounting block in a blanking device for building board production proposed by the present invention;

[0023] Figure 5 FIG. 5 is a partial three-dimensional structural schematic diagram of the hollow rod and the suction cup in a blanking device for building board production proposed by the present invention;

[0024] Figure 6 FIG. 6 Figure 1 is an enlarged structural schematic diagram at A in FIG. 5;

[0025] Figure 7 FIG. 7 Figure 2 is an enlarged structural schematic diagram at B in FIG. 5;

[0026] Figure 8 FIG. 8 Figure 3 is an enlarged structural schematic diagram at C in FIG. 5.

[0027] In the figure: 1 body, 2 mounting plate, 3 hydraulic cylinder, 4 punching module, 5 rectangular block, 6 slide bar, 7 push plate, 8 mounting block, 9 telescopic spring, 10 inclined bar, 11 abutting bar, 12 through hole, 13 rotating shaft, 14 inclined plate, 15 torsion spring, 16 discharge chute, 17 fixed cylinder, 18 hollow tube, 19 intake pipe, 20 piston rod, 21 outlet pipe, 22 vertical plate, 23 rectangular groove, 24 hollow rod, 25 suction cup, 26 vent hole, 27 rotating shaft, 28 sealing plate, 29 threaded sleeve, 30 horizontal plate, 31 stress plate, 32 circular opening, 33 vertical rod, 34 spring rod, 35 rotation limiting opening. Detailed implementation manner

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0029] Refer to Figures 1 - 8 , a blanking device for building board production, including a body 1, an L-shaped mounting plate 2 is fixedly installed on the upper surface of the body 1, a hydraulic cylinder 3 is fixedly installed on the upper surface of the mounting plate 2, the driving shaft of the hydraulic cylinder 3 passes through the mounting plate 2, and a punching module 4 is fixedly installed, a rectangular block 5 is fixedly installed on the upper surface of the body 1, sockets are symmetrically opened on the surface of the rectangular block 5, slide bars 6 are slidably inserted into the sockets, one ends of the two slide bars 6 are fixedly installed with a push plate 7, the other ends are fixedly installed with a mounting block 8, a telescopic spring 9 is sleeved on the slide bar 6, and both ends of the telescopic spring 9 are fixedly connected with the mounting block 8 and the rectangular block 5 respectively. An inclined bar 10 is fixedly installed on the upper surface of the push plate 7, and a discharge chute 16 is opened on the upper surface of the body 1.

[0030] A U-shaped abutting bar 11 is fixedly installed on the side wall at the bottom end of the driving shaft of the hydraulic cylinder 3. A through hole 12 for the end of the abutting bar 11 to pass through is opened on the upper surface of the inclined bar 10. A circular hole is horizontally opened on the hole wall of the through hole 12, a rotating shaft 13 is rotatably installed in the circular hole, an inclined plate 14 is fixedly sleeved on the rotating shaft 13, a mounting block is fixedly installed at one end of the rotating shaft 13 outside the through hole 12, and the mounting block is connected with the inclined bar 10 through an elastic member. The elastic member includes a torsion spring 15 sleeved on the rotating shaft 13, and both ends of the torsion spring 15 are fixedly connected with the mounting block and the inclined bar 10 respectively. A rotation limiting opening 35 is opened on the lower surface of the inclined bar 10, and the surface of the inclined plate 14 abuts against the hole wall of the rotation limiting opening 35. The rotation limiting opening 35 is used to limit the upward rotation of the end of the inclined plate 14 away from the rotating shaft 13.

[0031] First, place the material to be stamped on the upper surface of the table body 1 and under the punching module 4. At this time, start the hydraulic cylinder 3. When the driving shaft of the hydraulic cylinder 3 drives the punching module 4 to move downward, the abutting rod 11 will also move along with the driving shaft of the hydraulic cylinder 3. The bottom end of the abutting rod 11 will enter the through hole 12 and abut against the upper surface of the inclined plate 14. Under the abutting force of the abutting rod 11, the end of the inclined plate 14 far from the rotating shaft 13 will rotate downward. When the abutting rod 11 moves downward until it passes through the through hole 12 and no longer abuts against the inclined plate 14, the abutting force exerted by the abutting rod 11 on the inclined plate 14 disappears. The rotating shaft 13 will drive the inclined plate 14 to quickly rotate and reset under the elastic potential energy of the torsion spring 15. The end of the inclined plate 14 far from the rotating shaft 13 will be located in the rotation limiting port 35 again. When the stamping of the material is completed and the hydraulic cylinder 3 drives the punching module 4 to move upward, at this time, the surface of the abutting rod 11 will abut against the lower surface of the inclined plate 14. Since the inclined plate 14 cannot rotate upward under the limiting action of the rotation limiting port 35, the inclined plate 14 and the inclined rod 10 will move horizontally under the abutting action of the abutting rod 11. The pushing plate 7 will push the stamped material into the discharge chute 16 to complete the automatic discharging of the material without manual operation.

[0032] At the same time, as the abutting rod 11 moves upward, until the abutting rod 11 moves upward until it no longer contacts the inclined rod 10, the abutting force exerted by the abutting rod 11 on the inclined rod 10 disappears. The pushing plate 7, the inclined rod 10, and the mounting block 8 will quickly move and reset under the elastic potential energy of the multiple telescopic springs 9, thus not affecting the placement of the subsequent material to be stamped.

[0033] A fixing cylinder 17 is fixedly installed on the upper surface of the mounting plate 2. A hollow tube 18 with a closed end is fixedly installed inside the fixing cylinder 17. The closed end of the hollow tube 18 is connected to the inside of the housing of the hydraulic cylinder 3 through an air inlet pipe 19. A piston rod 20 is slidably and sealingly inserted into the hollow tube 18. An air outlet pipe 21 is fixedly installed on the surface of the hollow tube 18. Check valves are provided in both the air outlet pipe 21 and the air inlet pipe 19. The conduction direction of the check valve in the air inlet pipe 19 is from the inside of the housing of the hydraulic cylinder 3 to the inside of the hollow tube 18, and the conduction direction of the check valve in the air outlet pipe 21 is from the inside of the hollow tube 18 to the outside. The piston rod 20 is controlled to move through a connecting component. The connecting component includes a vertical plate 22 fixedly installed on the upper surface of the mounting block 8, and one end of the piston rod 20 is fixedly connected to the surface of the vertical plate 22.

[0034] When the push plate 7 moves horizontally, the mounting block 8 will also drive the vertical plate 22 to move together, so that the piston rod 20 fixedly connected to the vertical plate 22 will also move. When the vertical plate 22 moves towards the discharge chute 16, the piston rod 20 will also move into the hollow tube 18. The volume of the space between the end of the piston rod 20 and the inner wall of the hollow tube 18 will become smaller, and the pressure will increase. The gas located in this space will be discharged from the air outlet pipe 21. When the vertical plate 22 moves away from the discharge chute 16, the piston rod 20 will move out of the hollow tube 18. The volume of the space between the end of the piston rod 20 and the inner wall of the hollow tube 18 will become larger, and the pressure will decrease. The hot gas in the housing of the hydraulic cylinder 3 will enter the hollow tube 18 from the air inlet pipe 19. When the piston rod 20 moves into the hollow tube 18 next time, the hot gas in the hollow tube 18 will be squeezed out from the air outlet pipe 21, achieving the effect of dissipating heat from the hydraulic cylinder 3 and preventing the temperature from being too high due to the accumulation of a large amount of hot gas in the housing of the hydraulic cylinder 3, which affects the normal operation of the hydraulic cylinder 3.

[0035] A rectangular groove 23 is formed on the surface of the frustum 1. A through opening is formed in the top wall of the rectangular groove 23. A hollow rod 24 with a closed bottom is vertically and fixedly installed in the through opening. A suction cup 25 with an open top is fixedly installed at the top of the hollow rod 24. The suction cup 25 is located below the punching module 4, and the horizontal height of its upper surface is lower than the horizontal height of the upper surface of the push plate 7. A rotating opening is formed at the closed bottom of the hollow rod 24. An air vent 26 is formed on the surface of the hollow rod 24. A rotating shaft 27 is hermetically and rotatably installed in the rotating opening. One end surface of the rotating shaft 27 located inside the hollow rod 24 is fixedly installed with a blocking plate 28 for covering the air vent 26 through a connecting rod. The rotating shaft 27 is controlled to rotate through a threaded component. The threaded component includes a threaded sleeve 29. A thread is formed on the surface of one end of the rotating shaft 27 located outside the hollow rod 24. The threaded sleeve 29 is threadedly sleeved on the rotating shaft 27. A transverse plate 30 is fixedly sleeved on the threaded sleeve 29. The transverse plate 30 is connected to the groove wall of the rectangular groove 23 through a telescopic component. A stress plate 31 is fixedly installed at the bottom end of the threaded sleeve 29. A circular opening 32 communicating with the rectangular groove 23 is formed on the upper surface of the frustum 1. A vertical rod 33 is vertically and fixedly installed on the lower surface of the abutting rod 11. The vertical rod 33 corresponds to the position of the circular opening 32. The telescopic component includes two spring rods 34. The two ends of the spring rod 34 are respectively fixedly connected to the lower surface of the stress plate 31 and the bottom of the rectangular groove 23.

[0036] When placing the material on the upper surface of the table body 1, the lower surface of the material needs to be tightly pressed against the suction cup 25. The suction cup 25 will deform under the pressing force, and the gas located inside the suction cup 25 will escape from the gap between itself and the contact surface of the material. The suction cup 25 will form an adsorption with the material, avoiding the position deviation of the material affected by the vibration force during the downward movement of the punching module 4. As the punching module 4 moves downward, the vertical rod 33 will also move downward accordingly, and the bottom end will pass through the circular opening 32. When the punching module 4 contacts the material, the bottom end of the vertical rod 33 will also press against the force receiving plate 31 and apply a downward pressing force to the force receiving plate 31. Multiple spring rods 34 will contract, and the threaded sleeve 29 will also move downward. At this time, under the action of the thread, since the threaded sleeve 29 cannot rotate, the rotating shaft 27 will drive the sealing plate 28 to rotate. The sealing plate 28 no longer covers the ventilation port 26, and the ventilation port 26 will be in an open state. The gas located outside will enter the hollow rod 24 and the suction cup 25 from the ventilation port 26, making the internal and external air pressures of the suction cup 25 the same, and then releasing the adsorption of the suction cup 25 on the material. This facilitates the movement of the push plate 7 to push the material in the direction of the discharge chute 16 when the punching module 4 moves upward later. At the same time, as the abutting rod 11 moves upward, until the abutting rod 11 no longer contacts the inclined rod 10, the pressing force applied by the abutting rod 11 to the inclined rod 10 disappears. The push plate 7, the inclined rod 10, and the mounting block 8 will quickly move back to their original positions under the elastic potential energy of multiple telescopic springs 9, thus not affecting the placement of the subsequent material to be punched.

[0037] And when the punching module 4 moves upward, the pressing force applied by the vertical rod 33 to the force receiving plate 31 will also gradually disappear. The threaded sleeve 29 will gradually move upward and return to its original position under the elastic potential energy of multiple spring rods 34, and the rotating shaft 27 will also drive the sealing plate 28 to rotate again to cover the ventilation port 26, making the ventilation port 26 in a closed state again.

[0038] In the present invention, first, the material to be stamped is placed on the upper surface of the table body 1 and below the punching module 4. At this time, the hydraulic cylinder 3 is started. When the driving shaft of the hydraulic cylinder 3 drives the punching module 4 to move downward, the abutting rod 11 will also move along with the driving shaft of the hydraulic cylinder 3. The bottom end of the abutting rod 11 will enter the through hole 12 and abut against the upper surface of the inclined plate 14. Under the abutting pressure of the abutting rod 11, the end of the inclined plate 14 far from the rotating shaft 13 will rotate downward. When the abutting rod 11 moves downward until it passes through the through hole 12 and no longer abuts against the inclined plate 14, the abutting pressure of the abutting rod 11 on the inclined plate 14 disappears. Then the rotating shaft 13 will drive the inclined plate 14 to quickly rotate and reset under the elastic potential energy of the elastic member. The end of the inclined plate 14 far from the rotating shaft 13 will be located in the rotation limiting port 35 again. When the stamping of the material is completed and the hydraulic cylinder 3 drives the punching module 4 to move upward, at this time, the surface of the abutting rod 11 will abut against the lower surface of the inclined plate 14. Since the inclined plate 14 cannot rotate upward under the limiting action of the rotation limiting port 35, the inclined plate 14 and the inclined rod 10 will move horizontally under the abutting pressure of the abutting rod 11. The pushing plate 7 will push the stamped material into the unloading groove 16, completing the automatic unloading of the material without manual operation, avoiding the safety hazards of manual unloading, reducing the work burden and labor intensity of the operator, and improving the work efficiency of material unloading.

[0039] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present invention, according to the technical solution and inventive concept of the present invention, makes equivalent substitutions or changes, and should be covered by the protection scope of the present invention.

Claims

1. A blanking device for building board production, including a table body (1), characterized in that, On the upper surface of the frustum (1), an L-shaped placement plate (2) is fixedly installed. On the upper surface of the placement plate (2), a hydraulic cylinder (3) is fixedly installed. The driving shaft of the hydraulic cylinder (3) passes through the placement plate (2) and is fixedly installed with a punching module (4). On the upper surface of the frustum (1), a rectangular block (5) is fixedly installed. Sockets are symmetrically formed on the surface of the rectangular block (5). Slide bars (6) are slidably inserted into the sockets. One ends of the two slide bars (6) are fixedly installed with a push plate (7), and the other ends are fixedly installed with mounting blocks (8). A telescopic spring (9) is sleeved on the slide bar (6). The two ends of the telescopic spring (9) are respectively fixedly connected to the mounting block (8) and the rectangular block (5). On the upper surface of the push plate (7), an inclined rod (10) is fixedly installed. A discharge chute (16) is formed on the upper surface of the frustum (1). On the side wall at the bottom end of the driving shaft of the hydraulic cylinder (3), a U-shaped abutting rod (11) is fixedly installed. A through hole (12) for the end of the abutting rod (11) to pass through is formed on the upper surface of the inclined rod (10). A circular hole is horizontally formed on the hole wall of the through hole (12). A rotating shaft (13) is rotatably installed in the circular hole. An inclined plate (14) is fixedly sleeved on the rotating shaft (13). One end of the rotating shaft (13) located outside the through hole (12) is fixedly installed with a placement block. The placement block is connected to the inclined rod (10) through an elastic member. A rotation limiting hole (35) is formed on the lower surface of the inclined rod (10). The surface of the inclined plate (14) abuts against the hole wall of the rotation limiting hole (35). The rotation limiting hole (35) is used to limit the upward rotation of the end of the inclined plate (14) away from the rotating shaft (13).

2. The blanking device for building board production according to claim 1, characterized in that, The elastic member includes a torsion spring (15) sleeved on the rotating shaft (13). The two ends of the torsion spring (15) are respectively fixedly connected to the placement block and the inclined rod (10).

3. The blanking device for building board production according to claim 1, characterized in that, On the upper surface of the placement plate (2), a fixed cylinder (17) is fixedly installed. A hollow tube (18) with a closed end is fixedly installed in the fixed cylinder (17). The closed end of the hollow tube (18) is connected to the inside of the housing of the hydraulic cylinder (3) through an air inlet pipe (19). A piston rod (20) is slidably and sealingly inserted into the hollow tube (18). An air outlet pipe (21) is fixedly installed on the surface of the hollow tube (18). One-way valves are provided in both the air outlet pipe (21) and the air inlet pipe (19). The piston rod (20) is controlled to move through a connecting member.

4. The blanking device for building board production according to claim 3, characterized in that, The connecting member includes a vertical plate (22) fixedly installed on the upper surface of the mounting block (8). One end of the piston rod (20) is fixedly connected to the surface of the vertical plate (22).

5. The blanking device for building board production according to claim 3, characterized in that, The conduction direction of the one-way valve in the air inlet pipe (19) is from the inside of the housing of the hydraulic cylinder (3) to the inside of the hollow tube (18), and the conduction direction of the one-way valve in the air outlet pipe (21) is from the inside of the hollow tube (18) to the outside.

6. The blanking device for building board production according to claim 1, characterized in that, The surface of the frustum (1) is provided with a rectangular groove (23). A through opening is provided in the top wall of the rectangular groove (23). A hollow rod (24) with a closed bottom end is vertically and fixedly installed in the through opening. The top end of the hollow rod (24) which is open is fixedly installed with a suction cup (25). The suction cup (25) is located below the punching module (4), and the horizontal height of its upper surface is lower than the horizontal height of the upper surface of the push plate (7). A rotation opening is provided at the bottom end of the hollow rod (24) which is closed. An air vent (26) is provided on the surface of the hollow rod (24). A rotating shaft (27) is hermetically and rotatably installed in the rotation opening. One end surface of the rotating shaft (27) located inside the hollow rod (24) is fixedly installed with a blocking plate (28) for covering the air vent (26) through a connecting rod. The rotating shaft (27) is controlled to rotate through a threaded component.

7. The blanking device for building board production according to claim 6, characterized in that, The threaded component includes a threaded sleeve (29). Threads are provided on the surface of one end of the rotating shaft (27) located outside the hollow rod (24). The threaded sleeve (29) is threadedly sleeved on the rotating shaft (27). A cross plate (30) is fixedly sleeved on the threaded sleeve (29). The cross plate (30) is connected to the groove wall of the rectangular groove (23) through a telescopic component. A force-receiving plate (31) is fixedly installed at the bottom end of the threaded sleeve (29). A circular opening (32) communicating with the rectangular groove (23) is provided on the upper surface of the frustum (1). A vertical rod (33) is vertically and fixedly installed on the lower surface of the abutting rod (11). The vertical rod (33) corresponds to the position of the circular opening (32).

8. The blanking device for building board production according to claim 7, characterized in that, The telescopic component includes two spring rods (34). The two ends of the spring rods (34) are respectively fixedly connected to the lower surface of the force-receiving plate (31) and the bottom of the rectangular groove (23).

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