Positioning and punching device for paperboard processing

Abstract

The application discloses a positioning and punching device for paperboard processing and belongs to the technical field of carton processing. The device comprises a rack, a support fixedly installed on the rack, a punching mechanism installed on the support, the punching mechanism comprising two punch knives, a top cover fixedly connected to the top end of each punch knife, a discharge groove formed in the punch knife close to the top cover, and a compression mechanism arranged on one side of the punch knife and comprising an extrusion plate for compressing waste. In the application, the discharge groove is formed in the side wall of the punch knife, and the compression mechanism is arranged in a matching mode, so that the traditional collection mode of naturally stacking and freely falling of waste is changed. After the thick waste accumulated in the punch knife is discharged, the waste is compacted and compressed by the extrusion plate, the waste stacking volume is reduced, the container storage capacity is effectively improved, the cleaning frequency during shutdown is reduced, and the continuity and overall production efficiency of paperboard punching processing are remarkably improved.

Description

Technical Field

[0001] This invention relates to the field of cardboard processing technology, specifically to a positioning and punching device for cardboard processing. Background Technology

[0002] Paperboard is made from plant fibers such as wood pulp and waste paper through papermaking and multi-layer pressing. It has better hardness and load-bearing capacity than ordinary paper and includes types such as corrugated cardboard, hard cardboard, and honeycomb cardboard. It is widely used in packaging, printing and other fields and has the advantages of being lightweight, recyclable, and easy to cut and fold. Paperboard processing often requires punching holes to meet the needs of handles, ventilation, and binding. The positioning punching device is the core processing equipment. During operation, the device first completes the precise positioning of the paperboard through the limit baffle and scale positioning component, fixing the position of the board to prevent processing deviation. Then, it works with multiple punches of various specifications to complete the punching operation, which can punch standard holes, effectively ensuring the uniformity of hole positions in batch processing, avoiding paperboard deformation and rough hole edges, improving punching accuracy and processing efficiency, and adapting to the continuous production of paperboard of different thicknesses.

[0003] In existing technologies, cardboard processing positioning and punching devices typically employ a hollow cylindrical punch structure. During punching operations, the punch presses down to cut the cardboard, and the resulting circular paper scraps remain inside the cylindrical tube. When the device operates continuously, new paper scraps accumulate and stack, and the upper waste material is gradually squeezed out from the top of the cylindrical tube by the pushing and squeezing of the lower layer of paper scraps. The squeezed waste material falls freely and is collected in a pre-set collection container below, completing the routine waste collection operation.

[0004] However, in actual use, honeycomb cardboard has a multi-layer composite thickened structure, and the overall thickness of the board is much greater than that of ordinary cardboard and cardboard. The circular waste generated during punching is the same thickness as the board, resulting in a large thickness of small circular waste left after punching, and a high overall looseness and high void ratio. The waste is not compacted, and it will occupy a lot of the internal space of the collection container during the collection and storage process, causing the container to fill up very quickly. Summary of the Invention

[0005] The purpose of this invention is to provide a positioning and punching device for cardboard processing, so as to solve the problem in the prior art that the thick waste material cut off occupies a large amount of internal space of the collection container.

[0006] The technical problem to be solved by the present invention can be achieved by the following technical solution: including a frame, and a bracket fixedly installed on the frame, wherein a punching mechanism is installed on the bracket, and the punching mechanism includes two punches; Each punch has a top cover fixedly connected to its top. A discharge chute is provided on the punch near the top cover. A compression mechanism is provided on one side of the punch. The compression mechanism includes an extrusion plate, which compresses the waste material.

[0007] Preferably, the compression mechanism further includes an extrusion groove, which is fixed to one side of the punch, and the extrusion plate is slidably installed inside the discharge trough.

[0008] Preferably, the compression mechanism further includes a second cylinder, which is fixedly mounted on a bracket. A pusher plate is fixedly connected to the output end of the second cylinder. The pusher plate is slidably mounted inside the discharge trough. The pusher plate is used to push the waste material into the extrusion trough. A connecting rod is connected between the extrusion trough and the pusher plate.

[0009] Preferably, the lower end of the extrusion groove has a discharge port on the side near the punch.

[0010] Preferably, the two sides of the end of the pusher plate away from the cylinder are rounded, and the thickness of the pusher plate is less than the width of the discharge chute.

[0011] Preferably, a ramp plate is fixedly installed on the surface of the punch below the discharge port, and the ramp plate is set in an inclined shape.

[0012] Preferably, the punch is provided with an attitude limiting mechanism on the side near the extrusion groove. The attitude limiting mechanism includes a receiving groove on the punch, and a limiting plate is rotatably connected inside the receiving groove.

[0013] Preferably, both ends of the limiting plate are provided with extension mechanisms, and the extension mechanisms include movable grooves, which are opened on both sides of the extrusion groove.

[0014] Preferably, the extension mechanism further includes a second connecting rod rotatably mounted on both sides of the limiting plate. The other end of the second connecting rod passes through the movable groove and is fixedly connected to the push plate. Two second receiving grooves are opened inside the extrusion groove on the side near the punch, and the second receiving grooves are used to receive the second connecting rod.

[0015] Preferably, the punching mechanism further includes a cylinder, which is fixedly mounted on a bracket. A mounting plate is mounted on the output end of the cylinder, and the two punches are respectively mounted on both ends of the mounting plate.

[0016] Compared with the prior art, the beneficial effects of this application are as follows: 1. In this invention, by opening a discharge groove on the side wall of the punch and setting up a compression mechanism, the traditional method of collecting waste by natural accumulation and free fall is changed. After the thick waste accumulated inside the punch is discharged, the waste is compacted and compressed by the extrusion plate, reducing the volume of waste accumulation, effectively increasing the container storage capacity, reducing the frequency of machine downtime for cleaning, and significantly improving the continuity of cardboard punching and processing and the overall production efficiency.

[0017] 2. In this invention, precise guidance and correction are achieved through the inclined arrangement of the limiting plate. When the pushing plate pushes the sheet-like waste material inside the punch outward, the waste material first slides forward along the inclined limiting plate surface. Relying on the inclined surface blocking and lateral limiting effect of the limiting plate, the flat falling trend of the waste material is disrupted, forcing the sheet-like waste material to flip vertically and straighten its posture, so that it slides vertically along the plate surface and falls vertically into the extrusion groove, precisely aligning with the extrusion direction of the extrusion plate. When the waste material is in place and the extrusion process starts, the limiting plate rotates and retracts into the receiving groove to avoid the working area. There is no structural interference, and the guiding and avoiding actions can be completed adaptively without additional power, effectively solving the compression failure problem caused by the disordered posture of the waste material.

[0018] 3. In this invention, by setting up an extension mechanism composed of connecting rod two, movable groove and receiving groove two, the original reciprocating power of the push plate is used to realize the linkage opening and closing of the limit plate. During the pushing stage, it automatically extends to complete the waste posture correction, and during the extrusion stage, it automatically retracts to avoid the position. No additional driving components are required, which effectively solves the problem of fixed limit plate blocking waste discharge and causing material blockage and stagnation, and greatly improves the continuity and stability of equipment compression discharge. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the overall structure of the invention. Figure 1 ; Figure 2 This is a schematic diagram of the overall structure of the invention. Figure 2 ; Figure 3 This is a partial structural diagram of the present invention. Figure 1 ; Figure 4 This is a partial structural diagram of the present invention. Figure 2 ; Figure 5 This is a schematic diagram of the compression mechanism structure of the present invention; Figure 6 This is a schematic diagram of the side profile of the punch of the present invention.

[0020] Explanation of reference numerals in the attached figures: 1. Frame; 2. Support; 3. Drilling mechanism; 31. Cylinder 1; 32. Mounting plate; 33. Punch; 331. Top cover; 332. Discharge chute; 4. Compression mechanism; 41. Cylinder 2; 42. Push plate; 43. Extrusion groove; 44. Extrusion plate; 45. Connecting rod 1; 5. Discharge port; 6. Attitude limiting mechanism; 61. Receiving groove 1; 62. Limiting plate; 7. Limiting mechanism; 71. Movable groove; 72. Connecting rod 2; 73. Receiving groove 2; 8. Inclined plate. Detailed Implementation

[0021] The specific embodiments of the present invention will be described in detail below, but it should be understood that the scope of protection of the present invention is not limited to the specific embodiments.

[0022] Example 1 In actual use, honeycomb cardboard has a multi-layer composite thickened structure, and the overall thickness of the board is much greater than that of ordinary cardboard and cardboard. The circular waste generated during punching is the same thickness as the board, resulting in a large thickness of small circular waste left after punching, and a high overall fluffy and high void ratio. The waste has low stacking density, which will occupy a lot of the internal space of the collection container during the collection and storage process, causing the container to fill up very quickly.

[0023] like Figures 1 to 6 In this embodiment, the device includes a frame 1 and a bracket 2 fixedly mounted on the frame 1. A punching mechanism 3 is mounted on the bracket 2. The punching mechanism 3 includes two punches 33. The punching mechanism 3 also includes a cylinder 31, which is fixedly mounted on the bracket 2. A mounting plate 32 is mounted on the output end of the cylinder 31, and the two punches 33 are respectively mounted on both ends of the mounting plate 32. The top of each punch 33 is fixedly connected to a top cover 331. A discharge groove 332 is opened on the punch 33 near the top cover 331. A compression mechanism 4 is provided on one side of the punch 33. The compression mechanism 4 includes an extrusion plate 44, which compresses the waste material.

[0024] Working principle: such as Figures 3 to 6 During the cardboard punching process, the thick, round waste material generated during cutting is retained inside the hollow punch 33 and stacks upwards along the inner cavity of the punch 33. The top cover 331 at the top of the punch 33 can block and limit the top of the punch 33 to prevent the waste material from coming out of the top of the punch 33. At the same time, the discharge groove 332 opened near the top cover 331 of the punch 33 provides a channel for the internal waste material to be discharged. When the waste material accumulates to a certain amount in the inner cavity of the punch 33, it can be discharged through the discharge groove 332 to the compression mechanism 4 area on one side of the punch 33. Finally, the extrusion plate 44 of the compression mechanism 4 compresses the discharged punching waste material, effectively reducing the volume occupied by the waste material, solving the problem of loose accumulation and large storage space occupation of traditional punching waste material, and ensuring continuous and stable punching operation of the device. The frame 1 and the support 2 provide stable support for the overall structure, and the punching mechanism 3 is the core punching operation component. During operation, the cylinder 31 fixed on the support 2 starts and extends and retracts, which drives the mounting plate 32 at the output end to move vertically as a whole, and then simultaneously drives the two sets of punches 33 at both ends of the mounting plate 32 to complete the downward punching and reset lifting actions, so as to realize the continuous punching processing of paperboard.

[0025] It should be emphasized that the core improvement of this embodiment lies in the innovative structural design of opening a discharge trough 332 on the side wall of the punch 33 and setting up a compression mechanism 4. This changes the traditional collection method of natural accumulation and free fall of waste materials. After the thick waste material accumulated inside the punch 33 is discharged, the extrusion plate 44 is used to compact and compress the waste material, reducing the volume of waste material accumulation, effectively increasing the container storage capacity, reducing the frequency of machine downtime for cleaning, and significantly improving the continuity of cardboard punching and processing and the overall production efficiency.

[0026] like Figures 4 to 6 In this embodiment, the compression mechanism 4 further includes an extrusion groove 43, which is fixed on one side of the punch 33, and the extrusion plate 44 is slidably installed inside the discharge groove 332.

[0027] It should be noted that the extrusion groove 43 provides a fixed working cavity for waste material compression, and the extrusion plate 44 can complete the extrusion action inside the cavity to compact and compress the pushed-in waste material, thereby reducing the overall volume of the waste material.

[0028] like Figures 4 to 6 In this embodiment, the compression mechanism 4 also includes a second cylinder 41, which is fixedly installed on the bracket 2. The output end of the second cylinder 41 is fixedly connected to a push plate 42, which is slidably installed inside the discharge trough 332. The push plate 42 is used to push the waste material into the extrusion trough 43. A connecting rod 45 is connected between the extrusion trough 43 and the push plate 42.

[0029] It should be noted that cylinder 41 provides power for the reciprocating sliding of push plate 42. When push plate 42 extends outward, it pushes the waste material in punch 33 into extrusion groove 43. When push plate 42 retracts inward, connecting rod 45 drives extrusion plate 44 to extrude the waste material in extrusion groove 43. The feeding and compression processes are completed synchronously by relying on the same set of power.

[0030] like Figure 5 In this embodiment, the lower end of the extrusion groove 43 is provided with a discharge port 5 on the side near the punch 33.

[0031] It should be noted that when the push plate 42 retracts and resets, the connecting rod 45 drives the extrusion plate 44 to move, extruding and compressing the waste inside the extrusion groove 43. The thickness of the compressed waste is slightly smaller than the opening size of the discharge port 5, so that the compressed waste can be smoothly discharged from the discharge port 5.

[0032] like Figure 4 and Figure 5 In this embodiment, the two sides of the end of the push plate 42 away from the cylinder 41 are rounded, and the thickness of the push plate 42 is less than the width of the discharge trough 332.

[0033] It should be noted that the rounded corner structure at the end of the push plate 42 can prevent jamming and scraping during the pushing and sliding process. The thickness of the push plate 42 is less than the width of the discharge groove 332, ensuring that the push plate 42 slides smoothly back and forth and stably completes the pushing and discharging action of the waste inside the punch 33.

[0034] like Figures 1 to 3 In this embodiment, a ramp plate 8 is fixedly installed on the surface of the punch 33 below the discharge port 5, and the ramp plate 8 is set in an inclined shape. It should be noted that the compressed waste discharged from the discharge port 5 can fall directly onto the inclined ramp plate 8. Relying on the inclined guiding effect of the ramp plate 8, the waste can slide smoothly into the equipment collection area, thus completing the automatic collection of waste.

[0035] Example 2 It is understandable that in Embodiment 1, by setting the extrusion plate 44, the thick waste material accumulated inside the punch 33 is discharged into the extrusion groove 43, and the extrusion plate 44 is used to compact and compress the waste material, thereby reducing the waste material accumulation volume and increasing the container's storage capacity. However, in actual use, the waste material falls into the extrusion groove 43 with an unrestrained and highly random falling posture, making it impossible to achieve a uniform and regular posture. Thick sheet-like waste material is very likely to fall into the extrusion groove 43 in a flat, planar posture. After the waste material is laid flat against the bottom, its thickness direction is perpendicular to the extrusion stroke direction of the extrusion plate 44. The extrusion plate 44 cannot effectively extrude and flatten the waste material. Not only can it not achieve the compression effect of reducing the waste material volume, but it will also cause the waste material to accumulate and jam, leading to the failure of the compression structure and affecting the overall continuous operation performance of the equipment.

[0036] like Figure 4 and Figure 5 To solve the above problems, a posture limiting mechanism 6 is provided on the side of the punch 33 near the extrusion groove 43. The posture limiting mechanism 6 includes a receiving groove 61 opened on the punch 33, and a limiting plate 62 is rotatably connected inside the receiving groove 61.

[0037] Working principle: such as Figure 5 When the equipment is in normal feeding operation, the push plate 42 pushes the sheet-like waste inside the punch 33 outward. The inclined limit plate 62 extends out in advance and is in the material guiding position. The pushed waste first contacts the surface of the limit plate 62 and continues to slide down along the inclined plate surface of the limit plate 62 and is guided into the extrusion groove 43. Under the guiding constraint of the limiting plate 62, the sheet-like waste material falls vertically into the extrusion groove 43, so that the extrusion surface of the waste material is parallel and facing the extrusion plate 44, ensuring that the extrusion stroke direction of the extrusion plate 44 is completely matched with the pressure direction of the waste material. When the extrusion plate 44 begins to retract and flatten and compress the waste material, the limiting plate 62 rotates synchronously and retracts into the receiving groove 61, completely detaching from the extrusion operation area. This prevents obstruction and interference with the waste material flattening process, ensuring that the waste material can be fully and evenly compacted and compressed. This effectively avoids problems such as disordered waste material posture, inability to compress when laid flat, and material jamming and accumulation, ensuring stable and continuous operation of the compression mechanism 4.

[0038] It should be emphasized that the core improvement of this embodiment lies in the precise guidance and correction achieved by the inclined arrangement of the limiting plate 62. When the pushing plate 42 pushes the sheet-like waste inside the punch 33 outward, the waste first slides forward along the inclined limiting plate 62. Relying on the inclined surface blocking and lateral limiting effect of the limiting plate 62, the flat falling trend of the waste is disrupted, forcing the sheet-like waste to flip vertically and straighten its posture, so that it slides vertically along the plate surface and falls vertically into the extrusion groove 43, precisely aligning with the extrusion direction of the extrusion plate 44. When the waste is in place and the extrusion process is started, the limiting plate 62 rotates and retracts into the receiving groove 61 to avoid the working area. There is no structural interference, and the guiding and avoiding actions can be completed adaptively without additional power, effectively solving the compression failure problem caused by the disordered posture of the waste.

[0039] Example 3 Understandably, in Embodiment 2, by tilting the limiting plate 62, the waste material slides forward against the surface of the limiting plate 62, causing it to slide vertically down the plate and fall into the extrusion groove 43. However, in actual use, after the waste material has completed its posture correction, during the extrusion process of the extrusion plate 44, the overall thickness of the waste material is compressed and reduced. The sides of the waste material continue to adhere to the surface of the limiting plate 62. Since the limiting plate 62 is located on the discharge path of the extrusion groove 43, it will obstruct and jam the compressed waste material, causing the flattened waste material to be unable to fall smoothly from the discharge port 5. This easily leads to waste material retention and accumulation, affecting the continuous compression operation inside the extrusion groove 43 and reducing the overall processing smoothness of the equipment.

[0040] like Figure 5 To solve the above problems, extension mechanisms 7 are provided at both ends of the limiting plate 62. The extension mechanism 7 includes a movable groove 71, which is opened on both sides of the extrusion groove 43. The extension mechanism 7 also includes a connecting rod 72 rotatably installed on both sides of the limiting plate 62. The other end of the connecting rod 72 passes through the movable groove 71 and is fixedly connected to the push plate 42. Two receiving grooves 73 are opened inside the extrusion groove 43 on the side near the punch 33. The receiving grooves 73 are used to receive the connecting rod 72.

[0041] Working principle: such as Figure 5When the pusher plate 42 extends outward to push the material, the connecting rod 72 slides along the movable groove 71 to pull the limiting plate 62 outward and tilt it outward, so that the limiting plate 62 extends out of the working area and guides the pushed-out waste material at an angle, so that the waste material falls vertically into the extrusion groove 43, ensuring accurate extrusion alignment. When the pusher plate 42 retracts and the extrusion plate 44 begins to extrude the waste material, the connecting rod 72 pulls back synchronously with the pusher plate 42, driving the limiting plate 62 to rotate and flatten and completely avoid the side. The connecting rod 72 is stored inside the receiving groove 73, completely detached from the discharge path of the discharge port 5. After compression, the waste material can slide smoothly from the discharge port 5 and be discharged without obstruction.

[0042] It should be emphasized that the core improvement of this embodiment is that by setting up an extension mechanism 7 composed of a connecting rod 72, a movable groove 71, and a receiving groove 73, the original reciprocating power of the push plate 42 is used to realize the linkage opening and closing of the limiting plate 62. During the pushing stage, the plate automatically extends to complete the waste posture correction, and during the extrusion stage, it automatically retracts to avoid the obstruction. No additional driving components are required, which effectively solves the problem of the fixed limiting plate 62 blocking the waste discharge and causing material blockage and retention, and greatly improves the continuity and stability of the equipment's compression discharge.

[0043] It should be noted that the receiving groove 73 can store and hide the connecting rod 72 in the retracted state, avoiding the rod protrusion from interfering with the waste material falling and squeezing action, and ensuring that the overall structure operates compactly and smoothly.

[0044] Working principle: In use, firstly, a limit strip is set on the operating table of the frame 1. The operator places the cardboard to be processed on the operating table and uses the limit strip to limit and align the cardboard and make fine adjustments to its position to ensure that the cardboard is accurately punched and placed stably, avoiding deviation or misalignment during processing. After positioning, the punching mechanism 3 is started. The cylinder 31 installed on the bracket 2 drives the mounting plate 32 to move vertically back and forth, which in turn drives the punches 33 at both ends of the mounting plate 32 to move down synchronously, completing the continuous punching operation of the honeycomb thick cardboard. The thick circular waste material generated by punching and cutting is retained and accumulated in the inner cavity of the punch 33. The top cover 331 at the top of the punch 33 seals the top port to prevent the waste material from falling upward. When the waste material inside the punch 33 accumulates to the top of the punch 33, the cylinder 2 41 drives the push plate 42 to slide outward along the discharge groove 332, pushing the waste material inside the punch 33 outward; during the extension process, the push plate 42 is pulled by the connecting rod 2 72 to tilt and unfold, and the inclined surface of the limit plate 62 is used to guide and correct the waste material, disrupt the flat laying posture of the waste material, so that the waste material falls accurately into the extrusion groove 43 in a vertical state, ensuring that the pressure direction of the waste material matches the extrusion stroke direction; After the material is pushed, the push plate 42 retracts and resets. On the one hand, the connecting rod 45 drives the extrusion plate 44 to compact and compress the thick waste material in the extrusion groove 43, reducing the volume occupied by the waste material. On the other hand, the connecting rod 72 is pulled back synchronously with the push plate 42, driving the limit plate 62 to rotate and be retracted into the receiving groove 61. The connecting rod 72 is simultaneously retracted into the receiving groove 73, completely avoiding the discharge path and eliminating structural obstruction and interference. The thickness of the compressed waste is less than the opening size of the discharge port 5, so it can fall smoothly from the discharge port 5 and slide smoothly down the inclined ramp 8 to the equipment collection area. The whole process realizes the integrated operation of cardboard positioning, punching, waste posture correction, automatic compression and continuous discharge collection.

[0045] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed application.

Claims

1. A positioning and punching device for cardboard processing, characterized in that, Includes a frame (1) and a bracket (2) fixedly installed on the frame (1), wherein a punching mechanism (3) is installed on the bracket (2), and the punching mechanism (3) includes two punches (33). The top of each punch (33) is fixedly connected to a top cover (331). A discharge groove (332) is provided on the punch (33) near the top cover (331). A compression mechanism (4) is provided on one side of the punch (33). The compression mechanism (4) includes an extrusion plate (44) to compress the waste material.

2. The positioning and punching device for cardboard processing as described in claim 1, characterized in that, The compression mechanism (4) also includes an extrusion groove (43), which is fixed on one side of the punch (33), and the extrusion plate (44) is slidably installed inside the discharge trough (332).

3. The positioning and punching device for cardboard processing as described in claim 1, characterized in that, The compression mechanism (4) also includes a second cylinder (41), which is fixedly installed on the bracket (2). The output end of the second cylinder (41) is fixedly connected to a push plate (42). The push plate (42) is slidably installed inside the discharge trough (332). The push plate (42) is used to push the waste material into the extrusion trough (43). A connecting rod (45) is connected between the extrusion trough (43) and the push plate (42).

4. The positioning and punching device for cardboard processing as described in claim 2, characterized in that, The lower end of the extrusion groove (43) is provided with a discharge port (5) on the side near the punch (33).

5. The positioning and punching device for cardboard processing as described in claim 1, characterized in that, The push plate (42) has rounded corners on both sides at the end away from the cylinder (41), and the thickness of the push plate (42) is less than the width of the discharge trough (332).

6. The positioning and punching device for cardboard processing as described in claim 1, characterized in that, The surface of the punch (33) is fixedly mounted with a ramp plate (8) on the lower side of the discharge port (5), and the ramp plate (8) is set in an inclined shape.

7. The positioning and punching device for cardboard processing as described in claim 1, characterized in that, The punch (33) is provided with a posture limiting mechanism (6) on the side near the extrusion groove (43). The posture limiting mechanism (6) includes a receiving groove (61) opened on the punch (33), and a limiting plate (62) is rotatably connected inside the receiving groove (61).

8. The positioning and punching device for cardboard processing as described in claim 1, characterized in that, Both ends of the limiting plate (62) are provided with extension mechanisms (7), and the extension mechanism (7) includes a movable groove (71), which is opened on both sides of the extrusion groove (43).

9. A positioning and punching device for cardboard processing as described in claim 8, characterized in that, The extension mechanism (7) also includes a connecting rod two (72) rotatably installed on both sides of the limiting plate (62). The other end of the connecting rod two (72) passes through the movable groove (71) and is fixedly connected to the push plate (42). Two receiving grooves two (73) are opened inside the extrusion groove (43) on the side near the punch (33). The receiving groove two (73) is used to receive the connecting rod two (72).

10. A positioning and punching device for cardboard processing as described in claim 1, characterized in that, The punching mechanism (3) also includes a cylinder (31), which is fixedly mounted on the bracket (2). The output end of the cylinder (31) is equipped with a mounting plate (32), and the two punches (33) are respectively mounted on both ends of the mounting plate (32).

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