A die-cutting device for producing molds for blister packaging boxes

Abstract

This invention discloses a die-cutting device for producing molds of blister packaging boxes, belonging to the field of plastic packaging box production technology. The die-cutting device includes a die-cutting blade assembly, a spacing adjustment assembly, and a telescopic assembly arranged sequentially from top to bottom. The die-cutting blade assembly is used to cut the edges of the formed plastic box. The spacing adjustment assembly is used to adjust the distance between adjacent die-cutting blade assemblies. The telescopic assembly is used to drive the spacing adjustment assembly and the die-cutting blade assembly to move vertically. The spacing adjustment assembly includes a fixed column, one end of which is connected to the telescopic assembly. The other end of the fixed column is provided with a central fixing tube and a central fixing plate. The central fixing tube and the central fixing plate intersect at their middle sections and are perpendicularly arranged. The intersection of the central fixing tube and the central fixing plate is fixedly connected to the end of the fixed column. This technical solution solves the problem that existing die-cutting devices are difficult to adapt to blister packaging boxes of different sizes and arrangement spacings, leading to inconvenience in use.

Description

Technical Field

[0001] This invention belongs to the field of plastic packaging box production technology, specifically relating to a die-cutting device for blister packaging box production molds. Background Technology

[0002] In the automated production process of blister packaging boxes, plastic sheets are heated and vacuum-formed into a continuous box structure. To achieve rapid separation between finished boxes and waste sheets, a die-cutting device is used to punch the formed sheets, facilitating subsequent push-out separation. The cutting precision and flexibility of the die-cutting device directly determine the edge quality, dimensional consistency, and production efficiency of the product.

[0003] Currently, most common die-cutting devices for blister packaging boxes employ a fixed blade mounting structure. This means that multiple die-cutting blades are installed in the die-cutting template at a fixed, non-adjustable spacing, based on the specific product's dimensions. When producing plastic boxes of different lengths, widths, or spacings, operators typically attempt to adjust by replacing the entire blade module or individual blades (because the distribution and density of the plastic boxes on the sheet material changes). However, since the blade mounting holes, guide grooves, and mold frame connection structures in the die-cutting device are all fixed, even if the blade body is replaced, the relative positions between the blades (i.e., the blade spacing) remain constrained by the original template's physical structure and cannot be altered. In other words, simply replacing the blades without changing their mounting positions and spacing cannot solve the problem of misaligned cutting positions caused by variations in plastic box dimensions (resulting in products that are either overcut at the edges, cannot be effectively separated from the sheet material, or even cause blade interference or damage to the product).

[0004] This defect means that when manufacturers switch between different sizes of blister packaging boxes, they can only replace the entire set of die-cutting molds (including templates, tool positioning plates, etc.), which is time-consuming, costly, and difficult to meet the urgent needs of multi-variety, small-batch production. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a die-cutting device for producing molds for blister packaging boxes, so as to solve the problem that the existing die-cutting devices are difficult to adapt to blister packaging boxes of different sizes and arrangement spacings, resulting in inconvenience in use.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a die-cutting device for producing molds for blister packaging boxes. The die-cutting device includes a die-cutting blade assembly, a variable-distance assembly, and a telescopic assembly arranged sequentially from top to bottom. The die-cutting blade assembly is used to cut the edges of the formed plastic box. The variable-distance assembly is used to adjust the distance between adjacent die-cutting blade assemblies. The telescopic assembly is used to drive the variable-distance assembly and the die-cutting blade assembly to move vertically. The pitch-changing assembly includes a fixed column, one end of which is connected to the telescopic assembly. The other end of the fixed column has a central fixed tube and a central fixed plate, which intersect at their midpoints and are perpendicular to each other. The intersection of the central fixed tube and the central fixed plate is fixedly connected to the end of the fixed column. Several edge sliding tubes are symmetrically arranged on both sides of the central fixed tube. Several sliding columns are provided inside both the central fixed tube and the edge sliding tubes. The sliding column located in the middle of the central fixed tube is fixed to the fixed column, and the remaining sliding columns are slidably connected to the inner walls of the central fixed tube and the edge sliding tubes. The central fixed tube... Both the central fixed plate and the edge sliding tubes are provided with horizontal and vertical through slots. The central fixed plate is located in the horizontal through slot. Several edge sliding plates are symmetrically arranged in the horizontal through slots on both sides of the central fixed plate. Several sliding columns are provided with sliding holes. The central fixed plate and the edge sliding plates are located in the sliding holes. Each sliding column is provided with a die-cutting blade assembly. The die-cutting blade assembly passes through the vertical through slot and is connected to the limiting column. The fixed column is provided with a first driving assembly and a second driving assembly. The first driving assembly is used to drive several edge sliding plates to move synchronously, and the second driving assembly is used to drive several edge sliding tubes to move synchronously.

[0007] Furthermore, the first driving component is disposed above the second driving component. The first driving component includes a first external thread disposed on the outer surface of the fixed column. A first adjusting nut is disposed on the first external thread. The first adjusting nut is threadedly connected to the fixed column. A first rotating plate is disposed on the outer surface of the first adjusting nut. A first compression spring is disposed between adjacent sliding columns disposed in the same edge sliding tube. A first traction rope is symmetrically disposed inside the middle fixed tube. One end of the first traction rope is fixed to the end of the outermost sliding column of the middle fixed tube. The other end of the first traction rope passes through the sliding column at the intersection of the middle fixed tube and the middle fixed plate and is fixed to the end of the first rotating plate.

[0008] Furthermore, the second drive assembly includes a connecting pipe sleeved on a fixed post, with its upper end fixedly connected to the lower end of a first adjusting nut. A second external thread is provided on the outer surface of the connecting pipe, and a second adjusting nut is threaded onto this thread. A second rotating plate is rotatably mounted on the second adjusting nut. Second compression springs are provided between adjacent edge sliding pipes and between the central fixed pipe and adjacent edge sliding pipes on both sides. These second compression springs are respectively sleeved on several edge sliding plates. A mounting groove is symmetrically provided on the central fixed plate, and a second traction rope is provided within each mounting groove. One end of the second traction rope is fixed to a sliding post near the end of the central fixed plate, and the other end of the second traction rope passes through the mounting groove and is fixedly connected to the second rotating plate.

[0009] Furthermore, a fixing block is provided in the sliding hole of the sliding column near the end of the central fixing plate. The two ends of the fixing block are fixed to the inner wall of the sliding hole, and the fixing block is located in the mounting groove. One end of the second traction rope is fixed to the fixing block.

[0010] Furthermore, both ends of the central fixing tube are provided with first adjusting screws. One end of the first adjusting screw is fixed to the end of the sliding column provided on the outermost side of the central fixing tube. A first limiting nut is threaded onto the first adjusting screw, and the first limiting nut is abutted against the end of the central fixing tube.

[0011] Furthermore, each end of the central fixing plate is provided with a second adjusting screw. The end of the second adjusting screw passes through the end of the central fixing plate and is fixed to a sliding post provided near the end of the central fixing plate. A second limiting nut is threaded onto the second adjusting screw and abuts against the end of the central fixing plate.

[0012] Furthermore, the first traction rope located inside the central fixed tube is coaxially arranged with the central fixed tube.

[0013] Furthermore, the end of the second traction rope located in the mounting groove is fixed to the center position of the sliding column.

[0014] Furthermore, the telescopic component is a linear push rod or a hydraulic rod.

[0015] Furthermore, the die-cutting tool assembly includes a fixing rod and a die-cutting tool. One end of the fixing rod passes through a vertical through groove and is fixed to a sliding column, while the other end of the fixing rod is fixed to the die-cutting tool. Several grooves are provided on the contact surface between the die-cutting tool and the edge of the plastic box.

[0016] The technical effects achieved by this technical solution are as follows: In this technical solution, the first drive component in the pitch-changing assembly drives the edge sliding plate to move, adjusting the spacing of the die-cutting blade assemblies along the length of the central fixed tube and the edge sliding tube. Simultaneously, the second drive component drives the edge sliding tube to move, adjusting the spacing of the die-cutting blade assemblies along the length (i.e., vertical) of the central fixed plate and the edge sliding plate. These two directions work independently yet collaboratively, ensuring that the relative positions of all die-cutting blade assemblies precisely match the arrangement spacing and quantity of the plastic boxes on the raw material board. This allows for rapid adaptation to blister packaging boxes of different lengths, widths, and layouts without requiring a complete replacement of the die-cutting mold.

[0017] Other advantages, objectives, and features of the invention will be set forth in the following description and will be apparent to those skilled in the art in some respects, or may be learned by practice of the invention. The objectives and other advantages of the invention can be realized and obtained through the following description. Attached Figure Description

[0018] To make the objectives, technical solutions, and beneficial effects of this invention clearer, the following figures are provided for illustration: Figure 1 This is a plan view of the blister packaging box production equipment of the present invention; Figure 2 This is a three-dimensional schematic diagram of the die-cutting device of the present invention; Figure 3 This is a top view schematic diagram of the die-cutting device of the present invention; Figure 4 The die-cutting device of the present invention is along Figure 3 A schematic diagram of a cross-sectional view along section AA in the middle section; Figure 5 The die-cutting device of the present invention is along Figure 3 A schematic diagram of the cross-sectional view of the BB section line; Figure 6 This is a three-dimensional schematic diagram of the variable pitch component in the die-cutting device of the present invention; Figure 7 This is a three-dimensional schematic diagram of the arrangement of the central fixing tube and the central fixing plate in the die-cutting device of the present invention.

[0019] The following labels are shown in the attached diagram: 1. Feeding device; 2. Recycling device; 3. Vacuum forming device; 4. Die-cutting device; 5. Unloading device; 6. Raw material plate; 7. Equipment mounting frame; 8. Telescopic component; 9. Connecting block; 10. Fixing column; 11. Edge sliding tube; 12. Vertical through groove; 13. Horizontal through groove; 14. Sliding column; 15. Sliding hole; 16. Edge sliding plate; 17. Second compression spring; 18. First compression spring; 19. Fixing rod; 20. Die-cutting cutter; 21. First traction rope; 22. First external thread; 23. First adjusting nut; 24. First rotating plate; 25. Connecting pipe; 26. Second adjusting nut; 27. Second rotating plate; 28. Second traction rope; 29. ​​Second external thread; 30. Fixing block; 31. Second adjusting screw; 32. Second limit nut; 33. First adjusting screw; 34. First limit nut; 35. Mounting groove; 36. Middle fixing pipe; 37. Middle fixing plate. Detailed Implementation

[0020] like Figures 1-7As shown, a die-cutting device for producing blister packaging boxes is described. In this specific embodiment, the die-cutting device 4 specifically includes a die-cutting blade assembly, a pitch-changing assembly, and a telescopic assembly 8 arranged sequentially from top to bottom. The die-cutting blade assembly is used to cut the edge of the formed plastic box, the pitch-changing assembly is used to adjust the distance between adjacent die-cutting blade assemblies, and the telescopic assembly 8 is used to drive the pitch-changing assembly and the die-cutting blade assembly to move vertically. The variable pitch assembly includes a fixed column 10. One end of the fixed column 10 is connected to the telescopic assembly 8 via a connecting block 9. The other end of the fixed column 10 is provided with a central fixed tube 36 and a central fixed plate 37. The central fixed tube 36 and the central fixed plate 37 intersect at the middle and are arranged perpendicularly. The intersection of the central fixed tube 36 and the central fixed plate 37 is fixedly connected to the end of the fixed column 10. Several edge sliding tubes 11 are symmetrically arranged on both sides of the central fixed tube 36. Several sliding columns 14 are provided inside the central fixed tube 36 and the edge sliding tubes 11. The sliding column 14 located in the middle of the central fixed tube 36 is fixed to the fixed column 10 (specifically, the sliding column 14 is located inside the central fixed tube 36, and the middle part of the central fixed plate 37 is located inside the sliding hole 15, and the fixed column 10 connects the central fixed tube 36, the central fixed plate 37 and the sliding column 14). (The three are fixedly connected), and the remaining sliding columns 14 are slidably connected to the inner walls of the middle fixed tube 36 and the edge sliding tube 11. The middle fixed tube 36 and the edge sliding tube 11 are provided with a horizontal through groove 13 and a vertical through groove 12. The middle fixed plate 37 is located in the horizontal through groove 13. Several edge sliding plates 16 are symmetrically arranged in the horizontal through groove 13 on both sides of the middle fixed plate 37. Several sliding columns 14 are provided with sliding holes 15. The middle fixed plate 37 and the edge sliding plates 16 are located in the sliding holes 15. Each sliding column 14 is provided with a die-cutting knife assembly. The die-cutting knife assembly passes through the vertical through groove 12 and is connected to the limiting column. The fixed column 10 is provided with a first driving assembly and a second driving assembly. The first driving assembly is used to drive several edge sliding plates 16 to move synchronously, and the second driving assembly is used to drive several edge sliding tubes 11 to move synchronously.

[0021] The working principle of the above technical solution is as follows: When the dimensions of the produced plastic boxes change, the first step is to replace the die-cutting blade 20 on the die-cutting blade assembly so that it can just cover the edge of the plastic box. Secondly, the distribution spacing and number of plastic boxes on the raw material plate 6 need to be adjusted to ensure they cover as much of the width of the raw material plate 6 as possible. Therefore, the spacing of each die-cutting blade assembly needs to be adjusted to match the distribution position of the plastic boxes on the raw material plate 6. The specific method for adjusting the spacing is as follows: First, the first drive assembly moves the edge sliding plates 16 on both sides closer to or further away from the center, adjusting the spacing between the die-cutting blade assemblies along the length of the central fixed tube 36 and the edge sliding tube 11. Then, the second drive assembly moves the edge sliding tubes 11 on both sides closer to or further away from the center, adjusting the spacing between the die-cutting blade assemblies along the length of the central fixed plate 37 and the edge sliding plate 16. This adjusts the relative spacing and position of each die-cutting blade assembly, matching the spacing and number of plastic boxes on the raw material plate 6. During cutting, the telescopic assembly 8 simply moves the die-cutting blade assembly upwards to contact the raw material plate 6. After cutting, the assembly resets and waits for the next cutting, thus enabling the die-cutting device 4 to be suitable for cutting plastic boxes of different specifications. It is easy to understand that the number of die-cutting blade assemblies should match the number of plastic boxes. Excess die-cutting blade assemblies, or those not involved in cutting, can be removed by simply disassembling the die-cutting blade 20.

[0022] In one feasible embodiment, a first driving assembly is disposed above a second driving member. The first driving assembly includes a first external thread 22 disposed on the outer surface of a fixed post 10. A first adjusting nut 23 is disposed on the first external thread 22. The first adjusting nut 23 is threadedly connected to the fixed post 10. A first rotating plate 24 is disposed on the outer surface of the first adjusting nut 23 (the rotating connection can be achieved by opening an annular groove on the first adjusting nut 23 and engaging the middle part of the first rotating plate 24 in the annular groove, or by using a bearing, with the inner ring of the bearing fixed to the first adjusting nut 23 and the outer ring of the bearing fixed to the first rotating plate 24). A first compression spring 18 is disposed between adjacent sliding posts 14 disposed within the same edge sliding tube 11. A first traction rope 21 is symmetrically disposed inside the middle fixed tube 36. One end of the first traction rope 21 is fixed to the end of the outermost sliding post 14 of the middle fixed tube 36, and the other end of the first traction rope 21 passes through the sliding post 14 at the intersection of the middle fixed tube 36 and the middle fixed plate 37 and is fixed to the end of the first rotating plate 24.

[0023] The working principle of the above technical solution is as follows: When spacing adjustment is required, the position of the first adjusting nut 23 on the fixed column 10 can be manually rotated to control the movement direction of the end of the first traction rope 21 connected to the first rotating plate 24. When the first adjusting nut 23 moves down, the first traction rope 21 is pulled. At this time, the first traction rope 21 will pull the outermost sliding column 14 to move inward. Under the action of the first compression spring 18, it will push the remaining sliding columns 14 to move towards the middle. The distance between each sliding column 14 is consistent. The movement of the sliding column 14 will drive the die-cutting blade assembly fixed on it to move inward synchronously, thereby realizing the adjustment of the spacing of each die-cutting blade assembly in the length direction of the middle fixed tube 36 and the edge sliding tube 11. It is easy to understand that the first rotating plate 24 is rotatably connected to the first adjusting nut 23, meaning that the first rotating plate 24 will not rotate with the first rotating nut, and the first traction rope 21 will not become entangled. Similarly, when the first adjusting nut 23 rotates upward and the end of the first traction rope 21 moves upward, under the extension of the first compression spring 18, each sliding post 14 will move outward, and the sliding posts 14 will also maintain an equal distance between each sliding post 14. This will not be elaborated further here.

[0024] In one feasible embodiment, the second drive assembly includes a connecting pipe 25, which is sleeved on the fixed post 10, and the upper end of the connecting pipe 25 is fixedly connected to the lower end of the first adjusting nut 23. The outer surface of the connecting pipe 25 is provided with a second external thread 29, and a second adjusting nut 26 is threadedly connected to the second external thread 29. A second rotating plate 27 is rotatably provided on the second adjusting nut 26. A second compression spring 17 is provided between adjacent edge sliding pipes 11 and between the central fixed pipe 36 and the adjacent edge sliding pipes 11 on both sides. The second compression springs 17 are respectively sleeved on a plurality of edge sliding plates 16. The central fixed plate 37 is symmetrically provided with mounting grooves 35, and a second traction rope 28 is provided in the mounting groove 35. One end of the second traction rope 28 is fixed to the sliding post 14 near the end of the central fixed plate 37, and the other end of the second traction rope 28 passes through the end of the mounting groove 35 and is fixedly connected to the second rotating plate 27.

[0025] The working principle of the above technical solution is as follows: Typically, changes in the size of a plastic box involve both its length and width increasing or decreasing simultaneously. Therefore, the second drive mechanism employs this design. The specific adjustment principle is as follows: When the first adjusting nut 23 moves, it drives the connecting tube 25 to move as well. For example, when the first adjusting nut 23 moves downward to reduce the spacing between adjacent die-cutting components, the connecting tube 25 also rotates and moves downward, thereby driving the second adjusting nut 26 and the second rotating plate 27 downward, which in turn drives the end of the second traction rope 28 downward, pulling the sliding column 14 closer to the center, and consequently driving the edge sliding tube 11 towards the center. This allows for simultaneous adjustment of the spacing between the transverse and longitudinal die-cutting blade assemblies, achieving the purpose of simultaneously increasing or decreasing the transverse and longitudinal spacing. When the spacing of the die-cutting blade assemblies along the length of the central fixed tube 36 is adjusted to... After positioning, simply rotate the second adjusting nut 26 to further adjust the spacing of each die-cutting blade assembly in the direction of the central fixing block 30 (the adjustment principle is the same as that of the first drive assembly, and will not be elaborated further here). It is easy to understand that this setting method can simultaneously adjust the spacing of the horizontal and vertical die-cutting blade assemblies. Combined with the subsequent short-distance fine-tuning of the second adjusting nut 26, it can greatly improve the adjustment efficiency (if the two are adjusted separately, the second adjusting nut 26 needs to be rotated to the specified position separately, which is inefficient). It is also easy to understand that if the size of the plastic box is not conventionally different, the spacing of the die-cutting blade assemblies can also be adjusted by rotating the position of the second adjusting nut 26. It will just be that the number of rotations of the second adjusting nut 26 will increase. That is, the setting of the first drive assembly and the second drive assembly can cope with any change in the size of the plastic box.

[0026] By fixing the second drive assembly (connecting pipe 25) below the first adjusting nut 23, when the first adjusting nut 23 is rotated to adjust the lateral (X-direction) spacing, the connecting pipe 25 simultaneously drives the second adjusting nut 26 and the second rotating plate 27 to move, thereby driving the second traction rope 28 to pull the sliding column 14 in the longitudinal (Y-direction) direction closer to the center. This linkage design allows the lateral and longitudinal spacing to be reduced or increased simultaneously, avoiding the repetitive operation required to adjust the two directions separately, and significantly shortening the downtime for adjustment when changing product specifications. It is especially suitable for batch switching scenarios of standard plastic boxes with proportional changes in length and width.

[0027] Coarse adjustment via linkage: When the first adjusting nut 23 moves, the lateral and longitudinal spacing changes simultaneously, quickly approaching the target size. Independent fine adjustment: After the coordinated adjustment is in place, the second adjusting nut 26 can be rotated independently to perform a secondary fine adjustment of the longitudinal spacing, meeting the needs of non-proportional, asymmetrical, or irregular size changes. This dual-mode adjustment mechanism of "coordinated + independent" ensures high efficiency under normal conditions while also providing flexibility to handle complex size changes.

[0028] During lateral adjustment, the first compression spring 18 is positioned between adjacent sliding posts 14. Combined with the pull of the first traction rope 21 on the outermost sliding post 14, all sliding posts 14 (i.e., die-cutting blade assemblies) can be automatically and evenly distributed along the axis of the central fixed tube 36. Similarly, during longitudinal adjustment, the cooperation of the second compression spring 17 and the second traction rope 28 also ensures that the edge sliding tubes 11 and their corresponding die-cutting blade assemblies are evenly spaced along the length of the central fixed plate 37. This design avoids the tediousness and errors of manual alignment adjustments, ensuring consistent edge positions and stable cutting quality when multiple products are cut simultaneously.

[0029] The system employs symmetrically arranged compression springs in both the transverse and longitudinal directions. These springs can push the sliding tube of the sliding column 14 outward when the outer traction force decreases, and can be compressed to allow inward movement when the traction force increases. The elastic preload of the springs ensures that the entire pitch-changing assembly remains stably arranged without external locking, while allowing a wide range of strokes to cover various product layout requirements, from compact small sizes to wide large sizes. The entire adjustment process requires only manual rotation of the first adjusting nut 23 and / or the second adjusting nut 26, without relying on external power devices such as motors, cylinders, or electric push rods, reducing equipment manufacturing costs and control complexity. The threaded connection between the nut and the fixed column 10 has a self-locking characteristic, maintaining stable spacing after adjustment without the need for an additional locking mechanism, making it suitable for frequent model changeovers in blister packaging production lines.

[0030] In one feasible embodiment, a fixing block 30 is provided in the sliding hole 15 of the sliding column 14 near the end of the central fixing plate 37. Both ends of the fixing block 30 are fixed to the inner wall of the sliding hole 15, and the fixing block 30 is located within the mounting groove 35. One end of the second traction rope 28 is fixed to the fixing block 30. The fixing block 30, positioned within the mounting groove 35, does not affect the movement of the sliding column 14 on the central fixing plate 37 and improves the connection effect and force transmission effect at the end of the second traction rope 28.

[0031] In one feasible embodiment, both ends of the central fixing tube 36 are provided with a first adjusting screw 33. One end of the first adjusting screw 33 is fixed to the end of the sliding column 14 provided on the outermost side of the central fixing tube 36. A first limiting nut 34 is threaded onto the first adjusting screw 33 and abuts against the end of the central fixing tube 36.

[0032] In one feasible embodiment, each end of the central fixing plate 37 is provided with a second adjusting screw 31. The end of the second adjusting screw 31 passes through the end of the central fixing plate 37 and is fixed to a sliding post 14 provided near the end of the central fixing plate 37. A second limiting nut 32 is threaded onto the second adjusting screw 31 and abuts against the end of the central fixing plate 37.

[0033] After the first and second drive mechanisms are adjusted, rotating the first limiting nut 34 and the second limiting nut 32 will drive the first adjusting screw 33 and the second adjusting screw 31 to move outward, thus tightening the first traction rope 21 and the second traction rope 28. This provides a certain degree of vibration resistance. When subjected to vibration or external force, the first traction rope 21 and the second traction rope 28 are in a taut, fixed state at both ends, meaning the internal sliding column 14 will not move, and the spacing of the die-cutting blade assembly will not change, improving die-cutting accuracy. It is easy to understand that this setting works best when there are three sliding columns 14 in the middle fixed tube 36 and the edge sliding tube 11, allowing for the adjustment and fixation of the sliding column 14. If there are more than three sliding columns 14, the first adjusting screw 33 and the second adjusting screw 31 can only limit the sliding columns 14 at the ends, which also provides a certain degree of vibration resistance, because the edge die-cutting blade assembly is most susceptible to external force and interference.

[0034] In one feasible embodiment, the first traction rope 21 located inside the central fixed tube 36 is coaxially arranged with the central fixed tube 36, and the end of the second traction rope 28 located in the mounting groove 35 is fixed to the center position of the sliding column 14, thereby improving the transmission effect of lifting force.

[0035] In one feasible embodiment, the telescopic component 8 is a linear actuator or a hydraulic actuator, preferably an electrically driven linear actuator, because it offers higher control precision, which will not be elaborated further here.

[0036] In one feasible embodiment, the die-cutting assembly includes a fixing rod 19 and a die-cutting cutter 20. One end of the fixing rod 19 passes through the vertical through slot 12 and is fixed to the sliding post 14, while the other end of the fixing rod 19 is fixed to the die-cutting cutter 20. The die-cutting cutter 20 has several grooves on its contact surface with the edge of the plastic box. It should be noted that the die-cutting cutter 20 can cut in a cutting manner because the plastic box is still relatively soft at this point, making cutting relatively easy. The grooves are designed to leave the connecting parts uncut, avoiding direct cutting and separation of the plastic box from the raw material plate 6. Since the plastic box is relatively soft at this stage, direct cutting and separation would cause deformation of the plastic box under stress.

[0037] For ease of understanding, such as Figure 2As shown, in this specific embodiment, there are two edge sliding tubes 11 and two edge sliding plates 16 on both sides of the central fixing tube 36 and the central fixing plate 37. There are three sliding posts 14 inside both the central fixing tube 36 and the edge sliding tube 11. The central fixing tube 36 and the central fixing plate 37 are arranged in a cross shape. The fixing posts 10 fix the contact points of the central fixing tube 36 and the central fixing plate 37, as well as the sliding posts 14 on the contact points, ensuring that the relative positions of the central fixing posts 10 and the central fixing plate 37 do not change. This specific embodiment is the optimal design. The specific connection and arrangement relationships are as follows: Figures 2-7 As shown, I will not go into too much detail here.

[0038] It is easy to understand that in existing technology, blister packaging box production equipment includes a feeding device 1, a blistering device 3, a die-cutting device 4, a unloading device 5, and a recycling device 2, sequentially arranged on the equipment mounting frame 7. It needs to be explained that in the packaging box production process, the feeding device 1 is responsible for stably and continuously feeding raw materials (usually plastic rolls, such as PET, PVC, PS, PP, etc.) into the production line. This should also include: an unwinding mechanism: equipped with an air shaft to fix the roll, and using a magnetic powder brake to provide reverse tension to prevent the strip from loosening or becoming too tight. A storage mechanism: using floating storage rollers to ensure the production line does not stop during roll changes and to buffer tension fluctuations caused by intermittent traction. A deviation correction system: using photoelectric sensors to detect the edge of the strip, and using hydraulic or servo drive to move the unwinding frame laterally to ensure the material always runs on the centerline. A dust removal device: using sticky rollers or ionizers to remove dust and static electricity from the material surface to prevent pitting after blistering.

[0039] Vacuum forming unit 3, the core unit of the production line, is responsible for heating and softening the sheet material and forming it through vacuum / pressure. It should also include: Heating system: upper and lower heating furnaces, using ceramic infrared heating bricks or quartz heating tubes, with independent temperature control for each zone. Equipped with temperature sensors and PID control to ensure uniform softening of the sheet material. Forming system: Mold table: housing aluminum or copper molds, usually with water-cooling channels. Press frame: pressing the edges of the softened sheet material tightly to prevent air leakage. Vacuum system: a high-negative-pressure vacuum pump in conjunction with an air storage tank to quickly extract air between the mold and the sheet material. Auxiliary mechanisms: including upper mold (pre-stretching), bubble blowing (back blowing), and other auxiliary forming actions. Cooling system: after forming, spraying mist cooling water onto the back of the sheet material, combined with forced cooling by a fan, to accelerate setting.

[0040] Die-cutting device 4 separates the continuous sheet material after vacuum forming into individual products or designated units. It should also include: a traction mechanism: a servo-driven pressure roller that precisely feeds the formed sheet material into the cutting station; and a punching mechanism: employing a hydraulic or crankshaft punch press structure to drive the punching die (metal die). The die is designed with adjustable blade clearance to achieve die-cutting or punching separation.

[0041] The feeding device 5 is responsible for collecting the cut finished products, counting, stacking, and conveying them. The recycling device 2 processes the remaining edge waste (mesh-like waste with several material picking holes, where the raw material forms a plastic box) after cutting, achieving environmental protection or reuse. Waste traction: A pair of rubber pressure rollers are used to pull the punched waste mesh belt out from the main unit.

[0042] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made to it in form and detail without departing from the scope defined by the claims of the present invention.

Claims

1. A die-cutting device for producing molds for blister packaging boxes, characterized in that: The die-cutting device (4) includes a die-cutting blade assembly, a pitch-changing assembly, and a telescopic assembly (8) arranged sequentially from top to bottom; the die-cutting blade assembly is used to cut the edge of the formed plastic box, the pitch-changing assembly is used to adjust the distance between adjacent die-cutting blade assemblies, and the telescopic assembly (8) is used to drive the pitch-changing assembly and the die-cutting blade assembly to move vertically. The variable pitch assembly includes a fixed column (10), one end of which is connected to the telescopic assembly (8). The other end of the fixed column (10) is provided with a central fixed tube (36) and a central fixed plate (37). The central fixed tube (36) and the central fixed plate (37) intersect and are perpendicularly arranged. The intersection of the central fixed tube (36) and the central fixed plate (37) is fixedly connected to the end of the fixed column (10). Several edge sliding tubes (11) are symmetrically arranged on both sides of the central fixed tube (36). Several sliding columns (14) are provided inside both the central fixed tube (36) and the edge sliding tubes (11). The sliding column (14) located in the middle of the central fixed tube (36) is fixed to the fixed column (10). The remaining sliding columns (14) are slidably connected to the inner walls of the central fixed tube (36) and the edge sliding tubes (11). Both the central fixed tube (36) and the edge sliding tube (11) are provided with a transverse through groove (13) and a vertical through groove (12). The central fixed plate (37) is located in the transverse through groove (13). Several edge sliding plates (16) are symmetrically arranged in the transverse through grooves (13) on both sides of the central fixed plate (37). Several sliding columns (14) are provided with sliding holes (15). The central fixed plate (37) and the edge sliding plates (16) are located in the sliding holes (15). Each sliding column (14) is provided with a die-cutting knife assembly. The die-cutting knife assembly passes through the vertical through groove (12) and is connected to the limiting column. The fixed column (10) is provided with a first driving assembly and a second driving assembly. The first driving assembly is used to drive several edge sliding plates (16) to move synchronously. The second driving assembly is used to drive several edge sliding tubes (11) to move synchronously. The first driving component is located above the second driving component. The first driving component includes a first external thread (22) on the outer surface of the fixed column (10). A first adjusting nut (23) is provided on the first external thread (22). The first adjusting nut (23) is threaded to the fixed column (10). A first rotating plate (24) is provided on the outer surface of the first adjusting nut (23). A first compression spring (18) is provided between adjacent sliding columns (14) in the same edge sliding tube (11). A first traction rope (21) is symmetrically provided inside the middle fixed tube (36). One end of the first traction rope (21) is fixed to the end of the outermost sliding column (14) of the middle fixed tube (36). The other end of the first traction rope (21) passes through the sliding column (14) at the intersection of the middle fixed tube (36) and the middle fixed plate (37) and is fixed to the end of the first rotating plate (24). The second drive assembly includes a connecting pipe (25), which is sleeved on the fixed post (10). The upper end of the connecting pipe (25) is fixedly connected to the lower end of the first adjusting nut (23). A second external thread (29) is provided on the outer surface of the connecting pipe (25). A second adjusting nut (26) is threaded onto the second external thread (29). A second rotating plate (27) is rotatably provided on the second adjusting nut (26). Adjacent edge sliding pipes (11) and the middle fixed pipe (36) are adjacent to each other on both sides. A second compression spring (17) is provided between each of the edge sliding tubes (11). The second compression spring (17) is respectively sleeved on a number of edge sliding plates (16). The middle fixing plate (37) is symmetrically provided with mounting grooves (35). A second traction rope (28) is provided in the mounting groove (35). One end of the second traction rope (28) is fixed to the sliding column (14) near the end of the middle fixing plate (37). The other end of the second traction rope (28) passes through the end of the mounting groove (35) and is fixedly connected to the second rotating plate (27).

2. The die-cutting device for producing blister packaging boxes according to claim 1, characterized in that: A fixing block (30) is provided in the sliding hole (15) of the sliding column (14) near the end of the middle fixing plate (37). The two ends of the fixing block (30) are fixed to the inner wall of the sliding hole (15), and the fixing block (30) is located in the mounting groove (35). One end of the second traction rope (28) is fixed to the fixing block (30).

3. The die-cutting device for producing blister packaging boxes according to claim 1, characterized in that: Both ends of the central fixed tube (36) are provided with first adjusting screws (33). One end of the first adjusting screw (33) is fixed to the end of the sliding column (14) provided on the outermost side of the central fixed tube (36). A first limiting nut (34) is threaded onto the first adjusting screw (33). The first limiting nut (34) is abutted against the end of the central fixed tube (36).

4. The die-cutting device for producing blister packaging boxes according to claim 1, characterized in that: The ends of the middle fixing plate (37) are provided with second adjusting screws (31). The ends of the second adjusting screws (31) pass through the ends of the middle fixing plate (37) and are fixed to the sliding column (14) provided near the ends of the middle fixing plate (37). The second adjusting screws (31) are threaded with second limiting nuts (32), which abut against the ends of the middle fixing plate (37).

5. The die-cutting device for producing blister packaging boxes according to claim 1, characterized in that: The first traction rope (21) located inside the middle fixed tube (36) is coaxially arranged with the middle fixed tube (36).

6. The die-cutting device for producing blister packaging boxes according to claim 1, characterized in that: The end of the second traction rope (28) located in the mounting groove (35) is fixed to the center of the sliding column (14).

7. The die-cutting device for producing blister packaging boxes according to claim 1, characterized in that: The telescopic component (8) is a linear push rod or a hydraulic rod.

8. The die-cutting device for producing blister packaging boxes according to claim 1, characterized in that: The die-cutting tool assembly includes a fixing rod (19) and a die-cutting tool (20). One end of the fixing rod (19) passes through the vertical through groove (12) and is fixed to the sliding column (14). The other end of the fixing rod (19) is fixed to the die-cutting tool (20). The die-cutting tool (20) has several grooves on the contact surface with the edge of the plastic box.

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