Paperboard punching device with active feeding and discharging functions for carton production

Abstract

The invention belongs to the technical field of carton production and processing, and discloses a paperboard punching device with active feeding and discharging functions for carton production, which comprises a support frame, a positioning frame is fixed to the upper end of the right side of the support frame, an electric sliding table is fixed to the lower end of the positioning frame, and a sliding block is connected to the lower end of the electric sliding table; the lower end of the sliding block is connected with a positioning connecting rod, a movable frame is fixed to the lower end of the positioning connecting rod, a punching roller is rotationally connected to the lower end of the movable frame, a transmission roller is rotationally connected to the middle of the supporting frame, a power motor is fixed to the front end of the supporting frame, and the rear shaft end of the power motor is fixedly connected with the transmission roller. According to the paperboard punching device with the active feeding and discharging functions for carton production, by arranging a stamping block structure capable of being stored, a paperboard can be transferred and conveyed during storage, stamping of the paperboard can be normally completed after a stamping block is unfolded, the convenience of operation can be improved in cooperation with a feeding and discharging structure, and the production efficiency is improved. Manual operation is not needed, and the punching efficiency of the paperboard is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of carton production and processing, and specifically relates to a cardboard punching device for carton production with an active loading and unloading function. Background Art

[0002] Cartons are usually used as wrappers for goods or outer protectors for items. The volume of a carton changes according to the size of the goods. As an indispensable part of modern logistics, packaging cartons bear the important responsibilities of containing, protecting products, and being aesthetically pleasing. The physical performance indicators of packaging cartons become the basis for their quality evaluation. The accuracy and reliability of test data require good detection environmental conditions. Cartons are usually composed of cardboard bonded or spliced together. When processing cardboard, holes need to be punched at corresponding positions. To improve processing efficiency, cardboard punching equipment is used.

[0003] However, when the existing cardboard punching device for carton production with an active loading and unloading function is in use, there are still certain problems: Existing, such as a positioning punching device for cardboard production with a Chinese patent application number of CN202010913173.8, which relates to the field of positioning punching. This positioning punching device for cardboard production includes a support platform. One side of the upper surface of the support platform is fixedly connected with a support plate. Inside the upper end of the support plate, a second threaded rod is arranged. The outer surface of the second threaded rod is threadedly connected with a second threaded sleeve. One side of the second threaded sleeve is fixedly connected with a convex plate. One end of the convex plate away from the second threaded rod is fixedly connected with a connecting sleeve. One end of the connecting sleeve away from the support plate is rotatably connected with a first threaded rod. The outer surface of the first threaded rod is threadedly connected with a first threaded sleeve. The other end of the first threaded sleeve is fixedly connected with a driven gear inside the active gear. The first motor shaft is fixedly connected inside the active gear. 1. When the existing cardboard punching device is in use, it is necessary to perform independent loading and positioning before punching. The manual operation for positioning is cumbersome, and it is impossible to reliably position the cardboard during manual operation, easily causing the cardboard to shift, which affects the accuracy of the punching position. 2. The existing cardboard punching device is not convenient for continuous punching operations. The overall operation is inconvenient, it is not convenient for active loading and unloading, and manual operation is required for loading and unloading, resulting in a relatively low overall processing efficiency of the cardboard.

[0004] In response to the above problems, an innovative design is carried out on the basis of the original cardboard punching device for carton production with an active loading and unloading function. Summary of the Invention

[0005] The object of the present invention is to provide a cardboard punching device for carton production with an active loading and unloading function, so as to solve the problems presented in the above background technology that the existing cardboard punching device needs to be manually loaded and positioned during operation, it is difficult to avoid cardboard offset, the accuracy of punching cannot be guaranteed, and at the same time, the loading and unloading of the cardboard after punching is inconvenient, which affects the cardboard processing efficiency.

[0006] To achieve the above object, the present invention provides the following technical solution: A cardboard punching device for carton production with an active loading and unloading function, including a support frame: A positioning frame is fixed to the upper right end of the support frame, and an electric slide is fixed to the lower end of the positioning frame. A slider is connected to the lower end of the electric slide, a positioning connecting rod is connected to the lower end of the slider, a movable frame is fixed to the lower end of the positioning connecting rod, and a punching roller is rotatably connected to the lower end of the movable frame. A driving roller is rotatably connected to the middle of the support frame, and a power motor is fixed to the front end of the support frame, and the rear shaft end of the power motor is fixedly connected to the driving roller; A punching block penetrates through the outer wall of the punching roller, a bidirectional threaded rod is arranged inside the punching roller, and a transmission seat penetrates through the outside of the bidirectional threaded rod. A transmission connecting rod is connected to the outside of the transmission seat, and the end of the transmission connecting rod is connected to the punching block; A conveyor belt is installed on the left side of the support frame, and limiting plates are arranged on both sides of the conveyor belt. Guide rollers are connected to the lower ends of the limiting plates; A positioning plate is fixed to the middle of the right side of the support frame, a punching hole is opened in the middle of the positioning plate, and an infrared sensor is fixed to the right end of the positioning plate. A rotating rod penetrates through the front and rear sides of the support frame, and a limiting roller is connected to the end of the rotating rod near the positioning plate.

[0007] Preferably, two groups of electric slides are symmetrically arranged, and the electric slides are symmetrically distributed before and after the left and right central axes of the positioning plate, and the electric slides are slidably connected to the slider; A driving gear disc is connected to the rear end of the driving roller, a driven gear disc is connected to the rear end of the punching roller, and the driven gear disc is meshed with the driving gear disc.

[0008] Adopting the above technical solution, the driving roller can be driven to rotate by the power motor, and the rotation of the driving roller can drive the driving gear disc to rotate. The meshing of the driving gear disc and the driven gear disc can drive the punching roller to rotate synchronously and in the opposite direction. The cooperation of the driving roller and the punching roller can drive the cardboard to be transmitted.

[0009] Preferably, the lower end of the limiting plate is fixedly connected to the support frame, and the limiting plate is designed in an "L" shape. The limiting plate is rotatably connected to the upper end of the guide roller, and the guide rollers are arranged in an equidistant array. The guide rollers are inclined, and the distance between the two left guide rollers is greater than the distance between the two right guide rollers.

[0010] With the above technical solution, the guiding roller can be installed through the design of the limiting plate. Multiple groups of guiding rollers with an inclined design can limit the transmission angle and direction of the cardboard to avoid the situation of offset during subsequent punching of the cardboard and avoid errors in the punching position.

[0011] Preferably, the rear shaft end of the conveyor belt extends to the outside of the rear side of the support frame, and the rear end of the right side of the conveyor belt is connected with a first pulley. The rear end of the driving roller is fixed with a second pulley, and a first transmission belt is connected between the first pulley and the second pulley, and the diameter of the first pulley is smaller than that of the second pulley.

[0012] With the above technical solution, through the cooperation of the first pulley, the second pulley and the first transmission belt, the conveyor belt can be driven to rotate synchronously by using the belt structure when the driving roller rotates, providing rotational power for it, and reducing the setting of power sources to reduce costs.

[0013] Preferably, the driving seat is designed in a cross-shaped structure, and the outer wall of the driving seat is rotatably connected with the driving connecting rod. The end of the driving connecting rod is rotatably connected with the punching block, and the punching block is rotatably connected with the punching roller.

[0014] With the above technical solution, the punching block can be limited through the cooperation of the driving seat and the driving connecting rod. The position of the punching block can be improved by controlling the distance between the two driving seats, so that when the driving roller and the punching roller cooperate to convey the cardboard, the punching block can be received inside the punching roller, and when the punching roller punches the cardboard, the punching block can be controlled to move outside again to complete the punching.

[0015] Preferably, a bidirectional threaded rod passes through the middle of the driving seat, and the driving seats are symmetrically distributed at both ends of the bidirectional threaded rod, and the driving seats are threadedly connected with the bidirectional threaded rod. The driving connecting rod and the punching block are annularly arranged around the bidirectional threaded rod; Two groups of bidirectional threaded rods are symmetrically arranged, and the middle parts of the two groups of bidirectional threaded rods are fixedly connected. A fixing frame is fixed in the middle of the punching roller, and the fixing frame is rotatably connected with the bidirectional threaded rod.

[0016] With the above technical solution, the distance between the two driving seats can be adjusted by rotating the bidirectional threaded rod, and when the driving seat moves, it drives the two driving connecting rods to move to adjust the position of the punching block.

[0017] Preferably, the outer side end of the punching block is designed to be open, and a pushing plate is slidably connected inside the punching block. An expansion rod is arranged inside the punching block, and a return spring is sleeved outside the expansion rod. The expansion rods and the return springs are arranged at equal distances, and the two ends of the expansion rods and the return springs are respectively fixed to the inner wall of the punching block and the pushing plate.

[0018] With the above technical solution, through the cooperation of the pushing plate, the telescopic block and the return spring, when punching the cardboard, the punching waste is prevented from being embedded inside the punching block, and the punching block with an opening design can improve the flatness of the edge of the hole when punching the cardboard.

[0019] Preferably, the front end of the bidirectional threaded rod extends to the outside of the punching roller, and a first gear is connected to the front end of the bidirectional threaded rod. A first rack is fixed to the upper end of the middle part of the support frame, and the lower end of the first rack is meshed and connected with the first gear. A second rack is fixed to the rear end of the support frame, and the upper end of the second rack is meshed and connected with the driven gear disc.

[0020] With the above technical solution, through the cooperation between the second rack and the driven gear disc, when the electric sliding table drives the horizontal movement of the movable frame and the punching roller, the second rack can be used to drive the driven gear disc to rotate, and by using the cooperation between the first gear and the first rack, the first gear can drive the bidirectional threaded rod to rotate synchronously while the punching roller moves horizontally, thereby controlling the punching block to move outward from the punching roller.

[0021] Preferably, a transmission belt pulley is connected to the outside of the rotating rod, and the rotating rod and the transmission belt pulleys are evenly distributed in an array. A second transmission belt is connected between two adjacent groups of transmission belt pulleys. Fixed plates are bolted to the lower ends of both sides of the movable frame, and a third rack is fixed to the lower ends of the fixed plates. A second gear is connected to the outer end of the rotating rod, and the upper end of the second gear is meshed and connected with the third rack.

[0022] With the above technical solution, through the cooperation of multiple groups of transmission belt pulleys and the second transmission belt, multiple groups of rotating rods can be kept rotating synchronously. The third rack is connected to the movable frame through the fixed plate and can follow its movement, which is convenient for the horizontal movement of the punching roller and can drive the second gear to rotate synchronously by using the third rack.

[0023] Preferably, the second gear is rotatably connected to the rotating rod, and an internal ratchet is fixed inside the second gear. A pawl is rotatably connected to the outer wall of the rotating rod, and a second spring is fixed to the outer wall of the rotating rod at the end of the pawl, and the pawl is meshed and connected with the internal ratchet.

[0024] With the above technical solution, by using the cooperation between the internal ratchet and the pawl, the second gear can drive the rotating rod to rotate unidirectionally. The third rack moves to the right to drive the second gear to rotate alone, and when the third rack returns to the left, the third gear drives the rotating rod and the limiting roller to rotate synchronously to discharge the cardboard, improving the operation convenience.

[0025] Compared with the prior art, the beneficial effects of the present invention are as follows: The cardboard punching device for carton production with an active loading and unloading function can transfer and convey the cardboard during storage by setting a retractable punching block structure, and can normally complete the punching of the cardboard after the punching block is unfolded. Cooperating with the loading and unloading structure, it can improve the convenience of operation, and improve the punching efficiency of the cardboard without manual operation.

[0026] 1. The belt structure can synchronously provide rotational power for the driving roller and the conveyor belt, and cooperate with the deviation correction structure to avoid the deviation of the cardboard during feeding, improve the accuracy of cardboard hole punching, improve the processing quality of the cardboard, and reduce the design of the power source, which can reduce costs and the overall failure rate; 2. By setting a blanking structure, the horizontal movement of the punching roller can be used to provide power for it. When the punching roller returns to the left after punching, it drives the limiting roller to rotate unidirectionally, thereby driving the punched cardboard to be discharged. The structure is simple and improves the efficiency of cardboard punching operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a front view structural schematic diagram of the present invention; Figure 2 is a rear view structural schematic diagram of the present invention; Figure 3 is a structural schematic diagram of the movable frame and the punching roller of the present invention; Figure 4 is a structural schematic diagram of the limiting plate and the guiding roller of the present invention; Figure 5 is a structural schematic diagram of the driving roller and the driving gear disk of the present invention; Figure 6 is a structural schematic diagram of the positioning plate and the punching hole of the present invention; Figure 7 is a structural schematic diagram of the rotating rod and the second gear of the present invention; Figure 8 is a structural schematic diagram of the punching roller and the driven gear disk of the present invention; Figure 9 is a sectional view structural schematic diagram of the punching roller of the present invention; Figure 10 is a structural schematic diagram of the bidirectional threaded rod and the transmission seat of the present invention; Figure 11 is a structural schematic diagram of the second gear and the internal ratchet of the present invention.

[0028] In the figure: 1, support frame; 2, positioning frame; 3, electric slide; 4, slider; 5, positioning connecting rod; 6, movable frame; 7, punching roller; 8, driving roller; 9, power motor; 10, driving gear disc; 11, driven gear disc; 12, punching block; 13, conveyor belt; 14, limiting plate; 15, guiding roller; 16, first pulley; 17, second pulley; 18, first transmission belt; 19, fixing frame; 20, bidirectional threaded rod; 21, transmission seat; 22, transmission connecting rod; 23, telescopic rod; 24, reset spring; 25, pushing plate; 26, first gear; 27, first rack; 28, second rack; 29, positioning plate; 30, punching hole; 31, infrared sensor; 32, rotating rod; 33, limiting roller; 34, second gear; 35, transmission pulley; 36, second transmission belt; 37, fixing plate; 38, third rack; 39, internal ratchet; 40, pawl; 41, second spring. Detailed implementation manner

[0029] 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 embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0030] Please refer to Figures 1-11, the present invention provides a technical solution: a cardboard punching device for carton production with an active loading and unloading function, including a support frame 1. A positioning frame 2 is fixed to the upper right end of the support frame 1, and an electric sliding table 3 is fixed to the lower end of the positioning frame 2. A slider 4 is connected to the lower end of the electric sliding table 3, and a positioning connecting rod 5 is connected to the lower end of the slider 4. A movable frame 6 is fixed to the lower end of the positioning connecting rod 5, and a punching roller 7 is rotatably connected to the lower end of the movable frame 6. A driving roller 8 is rotatably connected to the middle of the support frame 1, and a power motor 9 is fixed to the front end of the support frame 1. The rear shaft end of the power motor 9 is fixedly connected to the driving roller 8; A positioning plate 29 is fixed to the middle right side of the support frame 1, a punching hole 30 is provided in the middle of the positioning plate 29, and an infrared sensor 31 is fixed to the right end of the positioning plate 29. Two groups of electric sliding tables 3 are symmetrically arranged, and the electric sliding tables 3 are symmetrically distributed before and after the left-right central axis of the positioning plate 29. The electric sliding tables 3 are slidably connected to the sliders 4. A driving gear disc 10 is connected to the rear end of the driving roller 8, and a driven gear disc 11 is connected to the rear end of the punching roller 7. The driven gear disc 11 is meshed with the driving gear disc 10; The driving roller 8 can be driven to rotate by the power motor 9, and the driving gear disc 10 connected to the rear end of the driving roller 8 can drive the driven gear disc 11 and the punching roller 7 to rotate. The rotation directions of the driving roller 8 and the punching roller 7 are opposite. When the cardboard is in the middle, the cardboard can be conveyed and moved to the upper end of the positioning plate 29. When the right end of the cardboard blocks the infrared sensor 31, the power motor 9 stops rotating. Then, the electric sliding table 3 is used to drive the slider 4, the positioning connecting rod 5, the movable frame 6 and the punching roller 7 to move horizontally, so as to punch the cardboard on the upper end of the positioning plate 29.

[0031] The outer wall of the punching roller 7 is penetrated by punching blocks 12, and a bidirectional threaded rod 20 is arranged inside the punching roller 7. The bidirectional threaded rod 20 penetrates through a transmission seat 21. A transmission connecting rod 22 is connected to the outside of the transmission seat 21, and the end of the transmission connecting rod 22 is connected to the punching block 12. The transmission seat 21 is designed in a cross-shaped structure. The outer wall of the transmission seat 21 is rotatably connected to the transmission connecting rod 22, the end of the transmission connecting rod 22 is rotatably connected to the punching block 12, and the punching block 12 is rotatably connected to the punching roller 7. The bidirectional threaded rod 20 penetrates through the middle of the transmission seat 21, and the transmission seat 21 is symmetrically distributed at both ends of the bidirectional threaded rod 20. The transmission seat 21 is threadedly connected to the bidirectional threaded rod 20. The transmission connecting rod 22 and the punching block 12 are both distributed in an annular array centered on the bidirectional threaded rod 20. There are two groups of symmetrically arranged bidirectional threaded rods 20, and the middle parts of the two groups of bidirectional threaded rods 20 are fixedly connected. A fixing frame 19 is fixed in the middle of the punching roller 7, and the fixing frame 19 is rotatably connected to the bidirectional threaded rod 20. The front end of the front bidirectional threaded rod 20 extends to the outside of the punching roller 7, and a first gear 26 is connected to the front end of the bidirectional threaded rod 20. A first rack 27 is fixed to the upper end of the middle part of the support frame 1, and the lower end of the first rack 27 is meshed with the first gear 26. A second rack 28 is fixed to the rear end of the support frame 1, and the upper end of the second rack 28 is meshed with the driven gear disk 11. The electric slide table 3 structure can drive the movable frame 6 to move horizontally. When the movable frame 6 moves to the right, the first rack 27 can be used to drive the first gear 26 and the bidirectional threaded rod 20 to rotate synchronously, and the bidirectional threaded rod 20 is used to drive the two groups of transmission seats 21 to move in opposite directions, and change the angle of the transmission connecting rod 22. The transmission connecting rod 22 is used to push the punching block 12 to move outside the punching roller 7 and extend to the outside. And by the cooperation of the second rack 28 and the driven gear disk 11, the driven gear disk 11 can rotate synchronously when the punching roller 7 moves horizontally to the right. During the rotation of the punching roller 7, the cardboard is punched by the cooperation of multiple punching blocks 12 and punching holes 30.

[0032] The outer end of the punching block 12 is designed with an opening, and a push plate 25 is slidably connected inside the punching block 12. An expansion rod 23 is arranged inside the punching block 12, and a return spring 24 is sleeved outside the expansion rod 23. The expansion rods 23 and the return springs 24 are distributed at equal intervals, and the two ends of the expansion rods 23 and the return springs 24 are respectively fixedly connected to the inner wall of the punching block 12 and the push plate 25. The opening design of the punching block 12 can improve the smoothness of the edge of the cardboard opening. In order to prevent the punching waste from being embedded inside the punching block 12, the design of the expansion rod 23 and the return spring 24 is used to ensure that the push plate 25 can push the waste embedded inside the punching block 12 out for blanking.

[0033] The front and rear sides of the support frame 1 are penetrated by a rotating rod 32, and a limiting roller 33 is connected to the end of the rotating rod 32 near the positioning plate 29; a transmission belt pulley 35 is connected to the outside of the rotating rod 32, and the rotating rod 32 and the transmission belt pulley 35 are evenly arranged in an array, and a second transmission belt 36 is connected between two adjacent groups of transmission belt pulleys 35. Bolts are connected to the lower ends of both sides of the movable frame 6 to fix a fixing plate 37, and a third rack 38 is fixed to the lower end of the fixing plate 37. The outer end of the rotating rod 32 is connected to a second gear 34, and the upper end of the second gear 34 is engaged with the third rack 38; the second gear 34 is rotatably connected to the rotating rod 32, and an internal ratchet 39 is fixed inside the second gear 34. A pawl 40 is rotatably connected to the outer wall of the rotating rod 32, and a second spring 41 is fixed to the outer wall of the rotating rod 32 at the end of the pawl 40, and the pawl 40 is engaged with the internal ratchet 39; through the design of the rotating rod 32, the limiting roller 33, the transmission belt pulley 35 and the second gear 34 can be connected. Multiple groups of limiting rollers 33 can limit the cardboard, and in cooperation with the support frame 1, the cardboard can be limited to improve the punching accuracy of the cardboard. At the same time, by using the cooperation of the third rack 38 and the second gear 34, when the punching roller 7 moves leftward after punching, the limiting roller 33 can be driven to rotate to discharge the cardboard. When the movable frame 6 moves leftward, the fixing plate 37 is driven to drive the third rack 38 to move synchronously, and the third rack 38 can drive the second gear 34 to rotate synchronously. When the second gear 34 rotates, the cooperation of the internal ratchet 39 and the pawl 40 can drive the rotating rod 32 and the limiting roller 33 to rotate synchronously to discharge the cardboard. Due to the cooperation of the internal ratchet 39 and the pawl 40, when the third rack 38 moves rightward, the second gear 34 rotates independently, and the rotating rod 32 and the limiting roller 33 do not rotate, so as to avoid displacement of the cardboard.

[0034] A conveyor belt 13 is installed on the left side of the support frame 1, and limiting plates 14 are arranged on both sides of the conveyor belt 13. A guiding roller 15 is connected to the lower end of the limiting plate 14. The lower end of the limiting plate 14 is fixedly connected to the support frame 1. The limiting plate 14 is designed in an "L" shape. The limiting plate 14 is rotationally connected to the upper end of the guiding roller 15. The guiding rollers 15 are distributed in an equidistant array. The guiding rollers 15 are inclined. And the distance between the two groups of guiding rollers 15 on the left side is greater than the distance between the two groups of guiding rollers 15 on the right side. The rear shaft end of the conveyor belt 13 extends to the outside of the rear side of the support frame 1. A first pulley 16 is connected to the rear end of the right side of the conveyor belt 13. A second pulley 17 is fixed to the rear end of the driving roller 8. A first transmission belt 18 is connected between the first pulley 16 and the second pulley 17. And the diameter of the first pulley 16 is smaller than that of the second pulley 17. Through the cooperation of the first pulley 16, the second pulley 17 and the first transmission belt 18, when the driving roller 8 rotates, the conveyor belt 13 can be provided with the power to rotate synchronously. When the conveyor belt 13 rotates, it can drive the cardboard to move for feeding. And by using the cooperation of the limiting plate 14 and the guiding roller 15, the deviation of the cardboard during transportation can be corrected, ensuring the accuracy of its position and avoiding the deviation of the punching position. The two groups of inclined guiding rollers 15 can continuously push the cardboard towards the middle of the conveyor belt 13 during the rightward transportation of the cardboard, thereby avoiding the deviation of the cardboard feeding position.

[0035] The content not described in detail in this specification belongs to the prior art well-known to those skilled in the art. Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A cardboard punching device for carton production with an active loading and unloading function, including a support frame (1), characterized in that: A positioning frame (2) is fixed to the upper right end of the support frame (1), and an electric sliding table (3) is fixed to the lower end of the positioning frame (2). A slider (4) is connected to the lower end of the electric sliding table (3). A positioning connecting rod (5) is connected to the lower end of the slider (4), and a movable frame (6) is fixed to the lower end of the positioning connecting rod (5). A punching roller (7) is rotatably connected to the lower end of the movable frame (6). A driving roller (8) is rotatably connected to the middle of the support frame (1). A power motor (9) is fixed to the front end of the support frame (1), and the rear shaft end of the power motor (9) is fixedly connected to the driving roller (8); A punching block (12) penetrates through the outer wall of the punching roller (7). A bidirectional threaded rod (20) is arranged inside the punching roller (7). A transmission seat (21) penetrates through the outside of the bidirectional threaded rod (20). A transmission connecting rod (22) is connected to the outside of the transmission seat (21), and the end of the transmission connecting rod (22) is connected to the punching block (12); A conveyor belt (13) is installed on the left side of the support frame (1). Limiting plates (14) are arranged on both sides of the conveyor belt (13). A guiding roller (15) is connected to the lower end of the limiting plate (14); A positioning plate (29) is fixed to the middle right side of the support frame (1). A punching hole (30) is opened in the middle of the positioning plate (29). An infrared sensor (31) is fixed to the right end of the positioning plate (29). A rotating rod (32) penetrates through the front and rear sides of the support frame (1). A limiting roller (33) is connected to the end of the rotating rod (32) near the positioning plate (29); 2. The cardboard punching device for carton production with an active loading and unloading function according to claim 1, wherein: Two groups of electric sliding tables (3) are symmetrically arranged, and the electric sliding tables (3) are symmetrically distributed before and after the left and right central axes of the positioning plate (29). The electric sliding tables (3) are slidably connected to the slider (4); A driving gear disc (10) is connected to the rear end of the driving roller (8). A driven gear disc (11) is connected to the rear end of the punching roller (7). The driven gear disc (11) is meshed with the driving gear disc (10); 3. A cardboard punching device for carton production with an active loading and unloading function according to claim 1, characterized in that: The lower end of the limiting plate (14) is fixedly connected to the support frame (1). The limiting plate (14) is designed in an "L" shape. The upper end of the limiting plate (14) is rotatably connected to the guiding roller (15). The guiding rollers (15) are arranged in an equidistant array. The guiding rollers (15) are inclined. The distance between the two left guiding rollers (15) is greater than the distance between the two right guiding rollers (15); 4. A cardboard punching device for carton production with an active loading and unloading function according to claim 3, characterized in that: The rear shaft end of the conveyor belt (13) extends to the outside of the rear side of the support frame (1). A first pulley (16) is connected to the rear right end of the conveyor belt (13). A second pulley (17) is fixed to the rear end of the driving roller (8). A first transmission belt (18) is connected between the first pulley (16) and the second pulley (17). The diameter of the first pulley (16) is smaller than that of the second pulley (17); 5. A cardboard punching device for carton production with an active loading and unloading function according to claim 1, characterized in that: The transmission seat (21) is designed in a cross-shaped structure, and the outer wall of the transmission seat (21) is rotatably connected to the transmission connecting rod (22). The end of the transmission connecting rod (22) is rotatably connected to the stamping block (12), and the stamping block (12) is rotatably connected to the punching roller (7).

6. The cardboard punching device for carton production with an active loading and unloading function according to claim 5, characterized in that: A bidirectional threaded rod (20) passes through the middle of the transmission seat (21), and the transmission seats (21) are symmetrically distributed at both ends of the bidirectional threaded rod (20). Moreover, the transmission seat (21) is threadedly connected to the bidirectional threaded rod (20). The transmission connecting rods (22) and the stamping blocks (12) are annularly arrayed with the bidirectional threaded rod (20) as the center; Two groups of bidirectional threaded rods (20) are symmetrically arranged, and the middles of the two groups of bidirectional threaded rods (20) are fixedly connected. A fixed frame (19) is fixed in the middle of the punching roller (7), and the fixed frame (19) is rotatably connected to the bidirectional threaded rod (20).

7. A cardboard punching device for carton production with an active loading and unloading function according to claim 6, characterized in that: The outer end of the stamping block (12) is designed to be open, and a push plate (25) is slidably connected inside the stamping block (12). An expansion rod (23) is arranged inside the stamping block (12), and a return spring (24) is sleeved outside the expansion rod (23). The expansion rods (23) and the return springs (24) are equidistantly arrayed, and the two ends of the expansion rods (23) and the return springs (24) are respectively fixedly connected to the inner wall of the stamping block (12) and the push plate (25).

8. A cardboard punching device for carton production with an active loading and unloading function according to claim 2, characterized in that: The front end of the front bidirectional threaded rod (20) extends to the outside of the punching roller (7), and a first gear (26) is connected to the front end of the bidirectional threaded rod (20). A first rack (27) is fixedly installed at the upper middle of the support frame (1), and the lower end of the first rack (27) is meshed with the first gear (26). A second rack (28) is fixedly installed at the rear end of the support frame (1), and the upper end of the second rack (28) is meshed with the driven gear disc (11).

9. A cardboard punching device for carton production with an active loading and unloading function according to claim 1, characterized in that: A transmission belt pulley (35) is connected to the outside of the rotating rod (32), and the rotating rods (32) and the transmission belt pulleys (35) are equidistantly arrayed. A second transmission belt (36) is connected between two adjacent groups of transmission belt pulleys (35). Fixed plates (37) are bolted to the lower ends of both sides of the movable frame (6), and a third rack (38) is fixedly installed at the lower end of the fixed plate (37). A second gear (34) is connected to the outer end of the rotating rod (32), and the upper end of the second gear (34) is meshed with the third rack (38).

10. A cardboard punching device for carton production with an active loading and unloading function according to claim 9, characterized in that: The second gear (34) is rotatably connected to the rotating rod (32), and an internal ratchet wheel (39) is fixed inside the second gear (34). A pawl (40) is rotatably connected to the outer wall of the rotating rod (32), and a second spring (41) is fixedly installed at the end of the pawl (40) and the outer wall of the rotating rod (32). Moreover, the pawl (40) is meshed with the internal ratchet wheel (39).

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