A feeding device for blister packaging box production molds

Abstract

This invention discloses a feeding device for a mold used in the production of blister packaging boxes, belonging to the field of plastic packaging box production technology. The feeding device includes a mounting frame, with a feeding assembly at the top and a receiving assembly at the bottom. The feeding assembly pushes the packaged boxes formed on the raw material board away from the mold, and the receiving assembly stacks several of the detached boxes. The feeding assembly includes a pushing cylinder fixed to the mounting frame. The output end of the pushing cylinder has a mounting plate, and the mounting plate has several evenly distributed push rods. One end of each push rod is fixed to the mounting plate, and the other end faces the receiving assembly. The receiving assembly includes a mounting ring, and the outer surface of the mounting ring has several fixing plates. This technical solution solves the problem that existing suction cup feeding devices are difficult to apply to packaging boxes with uneven bottom surfaces, resulting in poor adaptability.

Description

Technical Field

[0001] This invention belongs to the field of plastic packaging box production technology, specifically relating to a feeding device for a mold for producing blister packaging boxes. Background Technology

[0002] In the production process of blister packaging boxes, after the formed sheet is cut by the mold, the packaging box is connected to the waste board only by a few connection points. It needs to be separated and stacked by the unloading device.

[0003] Currently, the feeding device used in the molds for producing blister packaging boxes mostly adopts a suction cup structure. Its typical working method is: the vacuum suction cup adheres to the bottom surface of the packaging box, and then the cylinder drives the suction cup and the packaging box to move downward together, pulling or pressing the packaging box off from the connection point, and continuing to transfer it downward to a fixed position on a flat surface for placement and stacking.

[0004] However, this suction cup feeding method has the following prominent problems: the suction cup relies on negative pressure adsorption, which requires the bottom surface of the packaging box to be flat, smooth, without holes and oil stains. However, blister packaging boxes are often designed with reinforcing ribs, vents or curved surfaces to enhance structural strength, which leads to poor sealing and air leakage of the suction cup, making it impossible to reliably complete the downward transfer action. Therefore, the existing suction cup feeding device has the problem of poor adaptability. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to provide a feeding device for blister packaging box production molds, so as to solve the problem that the existing suction cup feeding device is difficult to apply to packaging boxes with uneven bottom surfaces, resulting in poor adaptability.

[0006] To achieve the above objectives, the present invention provides the following technical solution: The present invention provides a feeding device for a mold for producing blister packaging boxes. The feeding device includes a mounting frame, an upper part of which is provided with a feeding component, and a lower part of which is provided with a receiving component. The feeding component is used to push the packaging box formed on the raw material plate to detach, and the receiving component is used to stack several detached packaging boxes. The material feeding assembly includes a push cylinder, which is fixed on a mounting frame. The output end of the push cylinder is provided with a mounting plate, and the mounting plate is provided with a plurality of evenly distributed push rods. One end of each push rod is fixed to the mounting plate, and the other end of each push rod is positioned towards the material receiving assembly. The receiving assembly includes a mounting ring. The outer surface of the mounting ring has several fixing plates that fix the mounting ring to a mounting frame. The outer surface of the mounting ring also has several sliding rods that are slidably connected to the mounting ring. A retaining spring is fitted onto the outward-facing portion of each sliding rod. One end of the retaining spring is fixed to the mounting ring, and the other end is fixed to the outward-facing end of the sliding rod. A sliding shaft is located in the middle of the mounting ring, and several sliding rods abut against the sliding shaft. A support plate is located at the upper end of the sliding shaft, positioned directly below the top rod and fixed to the sliding shaft. The inner surface of the mounting ring has several grooves, and the outer surface of the sliding shaft has several protruding ridges that slidably fit within the grooves.

[0007] Furthermore, the top rod includes an upper rod, a lower rod, and a middle rod. The upper end of the upper rod is fixed to the mounting plate, and the lower end of the upper rod has a sliding cavity inside. The lower end of the middle rod is fixed to the upper end of the lower rod, and the upper end of the middle rod is slidably connected to the sliding cavity. A buffer spring is provided between the lower end of the upper rod and the upper end of the lower rod. The buffer spring is sleeved on the middle rod, and the two ends of the buffer spring are respectively fixed to the outer surfaces of the upper rod and the lower rod.

[0008] Furthermore, the top rod at the center of the mounting plate is provided with an annular groove, which is located on the lower end of the lower rod. A sliding hole is provided on the support plate below the lower rod, and a mounting hole is provided on the sliding shaft below the sliding hole. Several limiting rods are provided circumferentially on the outer surface of the mounting hole. The limiting rods are slidably connected to the side wall of the mounting hole. A wedge-shaped surface is provided on the end of the limiting rod located inside the mounting hole. The lowest point of the wedge-shaped surface is located on the end of the limiting rod located inside the mounting hole, and the wedge-shaped surface faces the support plate. A limiting spring is provided on the end of the limiting rod located outside the mounting hole. The limiting spring is sleeved on the limiting rod. One end of the limiting spring is fixed to the sliding shaft, and the other end of the limiting spring is fixed to the end of the limiting rod located outside the mounting hole.

[0009] Furthermore, a traction rope is provided on one end of the limiting rod outside the mounting hole. One end of the traction rope is fixed to the limiting rod, and the other end of the limiting rod is fixed to the mounting frame. A guide plate is provided below the traction rope. One end of the guide plate is fixed to the sliding shaft, and a guide block is provided on the other end of the guide plate. One end of the guide block is fixed to the guide plate, and a sliding hole is provided on the other end of the guide block. The traction rope is slidably connected in the sliding hole, and the sliding hole is coaxially arranged with the limiting rod.

[0010] Furthermore, the cross-section of the limiting rod is rectangular.

[0011] Furthermore, the mounting frame is also equipped with a robotic arm, which is used to transfer the stacked packaging boxes on the pallet onto the conveyor belt.

[0012] Furthermore, the mounting frame includes four rectangularly distributed columns, with a crossbeam between adjacent columns. The two ends of the crossbeam are fixed to the adjacent columns, and a top plate is provided at the upper end of each column. The push cylinder is fixed to the top plate.

[0013] The technical effects achieved by this technical solution are as follows: In this technical solution, the push rod directly contacts and presses down on the bottom surface of the packaging box, which is completely independent of airtightness. Therefore, there are no restrictions on the shape of the bottom surface. Whether it is a flat plane, an arc-shaped curved surface, a concave and convex bottom surface with reinforcing ribs, a tray with ventilation holes or hollow structure, or a rough textured surface such as frosted or flocked, the push rod can reliably transmit pressure, force demolding and drive the tray to step forward. The success rate of material unloading is high. It is especially suitable for complex bottom products with suction cups that frequently fail due to air leakage or insufficient suction force, which significantly improves production stability and process adaptability.

[0014] 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

[0015] 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 three-dimensional schematic diagram of the feeding device of the present invention; Figure 2 This is a three-dimensional schematic diagram of the top material assembly in the feeding device of the present invention; Figure 3 This is a schematic cross-sectional view of the top material assembly in the feeding device of the present invention; Figure 4 This is a three-dimensional schematic diagram of the receiving component in the feeding device of the present invention; Figure 5 This is a schematic cross-sectional view of the receiving component in the feeding device of the present invention; Figure 6 This is a schematic plan view of the blister packaging box production equipment of the present invention.

[0016] The following labels are shown in the attached diagram: 1. Column; 2. Top plate; 3. Push cylinder; 4. Upper rod; 5. Sliding cavity; 6. Lower rod; 7. Middle rod; 8. Buffer spring; 9. Annular groove; 10. Support plate; 11. Sliding hole; 12. Mounting ring; 13. Sliding shaft; 14. Protruding ridge; 15. Sliding rod; 16. Clamping spring; 17. Mounting hole; 18. Limiting rod; 19. Limiting spring; 20. Wedge-shaped surface; 21. Guide plate; 22. Guide block; 23. Traction rope; 24. Fixing plate; 25. Lower crossbeam; 26. Upper crossbeam; 27. Mounting plate; 28. Raw material plate; 29. ​​Packaging box; 30. Material picking hole; 31. Feeding device; 32. Vacuum forming device; 33. Cutting device; 34. Unloading device; 35. Recycling device. Detailed Implementation

[0017] like Figures 1-5 As shown, a feeding device for a blister packaging box production mold is described. It is easy to understand that in existing technology, blister packaging box production equipment includes a feeding device 31, a blistering device 32, a cutting device 33, a feeding device 34, and a recycling device 35 arranged sequentially. It needs to be explained that in the production process of the packaging box 29, the feeding device 31 is responsible for stably and continuously feeding raw materials (usually plastic rolls, such as PET, PVC, PS, PP, etc.) into the production line. It should also include: an unwinding mechanism: equipped with an air shaft to fix the roll, and 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: detecting the edge of the strip through photoelectric sensors 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 ionizing air bars to remove dust and static electricity from the material surface to prevent pitting after blistering.

[0018] The vacuum forming unit 32, 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: a 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. A forming system: a mold table: housing aluminum or copper molds, usually with water-cooling channels. A pressing frame: pressing the edges of the softened sheet material tightly to prevent air leakage. A 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. A cooling system: after forming, spraying mist-like cooling water onto the back of the sheet material, combined with forced cooling by a fan, to accelerate setting.

[0019] The cutting device 33 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 mold). The die is designed with adjustable blade clearance to achieve die-cutting or punching separation.

[0020] The feeding device 34 is responsible for collecting the cut finished products and counting, stacking, and conveying them. The recycling device 35 processes the remaining edge waste (mesh-like waste with several material picking holes 30 distributed on it, and the raw material at the material picking holes 30 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 machine.

[0021] In this technical solution, the unloading device 34 includes a mounting frame, which includes four rectangularly distributed columns 1. A crossbeam (including an upper crossbeam 26 and a lower crossbeam 25) is provided between adjacent columns 1. The two ends of the crossbeam are fixed to the adjacent columns 1 respectively. A top plate 2 is provided at the upper end of the column 1. A push cylinder 3 is fixed to the top plate 2. A material-lifting assembly is provided at the upper part of the mounting frame. A material-receiving assembly is provided at the lower part of the material-lifting assembly. The material-lifting assembly is used to push the packaging box 29 formed on the raw material plate 28 (flexible, unhardened, hardening only after vacuum forming and cooling) off. The material-receiving assembly is used to stack several packaging boxes 29 after they have been detached. The material feeding assembly includes a push cylinder 3, which is fixed on the mounting frame. The output end of the push cylinder 3 is provided with a mounting plate 27. The mounting plate 27 is provided with several evenly distributed push rods. One end of the push rod is fixed on the mounting plate 27, and the other end of the push rod is set towards the receiving assembly. The receiving assembly includes a mounting ring 12. The outer surface of the mounting ring 12 is provided with several fixing plates 24, which fix the mounting ring 12 to the mounting frame. The outer surface of the mounting ring 12 is provided with several sliding rods 15, which are slidably connected to the mounting ring 12. A retaining spring 16 is sleeved on the outward-facing portion of the sliding rod 15. One end of the retaining spring 16 is fixed to the mounting ring 12, and the other end is fixed to the outward-facing end of the sliding rod 15. A sliding shaft 13 is provided in the middle of the mounting ring 12, and several sliding rods 15 abut against the sliding shaft 13. A support plate 10 is provided at the upper end of the sliding shaft 13, positioned directly below the top rod and fixed to the sliding shaft 13. The inner surface of the mounting ring 12 is provided with several grooves, and the outer surface of the sliding shaft 13 is provided with several protrusions 14, which are slidably disposed within the grooves (the protrusions 14 and grooves prevent the sliding shaft 13 from rotating).

[0022] The working principle of the above technical solution is as follows: When the formed packaging box 29 (conical shape, narrower at the bottom and wider at the top) on the raw material plate 28 is conveyed to the area directly below the push rod, the push cylinder 3 drives the push rod downwards. The push rod acts on the bottom surface of the packaging box 29. Since both ends of the raw material plate 28 are taut, the push rod acting on the packaging box 29 will cause the packaging box 29 to move downwards, thereby causing the edge connection points of the packaging box 29 to detach from the raw material plate 28 (after cutting by the cutting device 33, only a few connection points remain). Then, under the action of the push rod, it falls and is placed on the pallet 10. Simultaneously, under the pressure of the push rod, the pallet 10 will be pushed downward to overcome the clamping friction force applied by the clamping spring 16 and the push rod. That is, under the action of the push rod, the upper edge of the packaging box 29 on the pallet 10 is located below the raw material plate 28 (it is easy to understand that there is a certain height to avoid the packaging box 29 that has not been detached from the raw material plate 28 from contacting the packaging box 29 on the pallet 10, which would cause the packaging box 29 on the pallet 10 to be scattered). After the push is in place, the push cylinder 3 drives the push rod to reset and start the next push material support cycle. It is easy to understand that the pushing distance of the push rod can be set according to actual needs. Preferably, the initial height of the pallet 10 from the raw material plate 28 is 5mm greater than the height of the packaging box 29. If the height of the packaging box 29 is 50mm, and the distance that the push cylinder 3 moves to below the raw material plate 28 each time is 5mm plus the thickness and height of the packaging box 29, such as if the thickness of the packaging box 29 is 1mm, then the push cylinder 3 only needs to move to 56mm below the raw material plate 28 each time. Therefore, the push cylinder 3 will drive the pallet 10 to move downward by the thickness of one packaging box 29 each time, thereby ensuring that the stacked packaging boxes 29 do not interfere with the packaging boxes 29 on the raw material plate 28.

[0023] The technical effects achieved by the above technical solution are as follows: Each time the push rod completes a downward pressing action, it simultaneously performs two key functions: first, it forcibly pushes the packaging box 29 off the raw material plate 28; second, it transmits pressure to the support plate 10 through the packaging box 29, pushing the support plate 10 to overcome the spring force and precisely move down by the thickness of one packaging box 29 wall, thereby realizing the layer-by-layer nesting and stacking of the packaging boxes 29; after each step, the upper edge of the top packaging box 29 is always lower than the preset safety gap of the plane of the raw material plate 28, completely avoiding interference with the undemolded packaging box 29. Compared to suction cup-type unloading that relies on vacuum adsorption, this solution uses an ejector rod to directly physically contact and press down on the bottom surface of the packaging box 29, completely independent of airtightness. Therefore, there are no restrictions on the shape of the bottom surface—whether it is a flat plane, an arc-shaped surface, a concave-convex bottom surface with reinforcing ribs, a tray with ventilation holes or hollow structure, or a rough textured surface such as frosted or flocked, the ejector rod can reliably transmit pressure, force demolding and drive the tray in 10 steps, resulting in a high unloading success rate. It is especially suitable for complex bottom surface products where suction cup-type unloading frequently fails due to air leakage or insufficient adsorption force, significantly improving production stability and process adaptability.

[0024] In one feasible embodiment, the top rod includes an upper rod 4, a lower rod 6, and a middle rod 7. The upper end of the upper rod 4 is fixed to the mounting plate 27, and the lower end of the upper rod 4 is provided with a sliding cavity 5. The lower end of the middle rod 7 is fixed to the upper end of the lower rod 6, and the upper end of the middle rod 7 is slidably connected to the sliding cavity 5. A buffer spring 8 is provided between the lower end of the upper rod 4 and the upper end of the lower rod 6. The buffer spring 8 is sleeved on the middle rod 7, and the two ends of the buffer spring 8 are respectively fixed to the outer surfaces of the upper rod 4 and the lower rod 6.

[0025] Downward Pressing Phase: As the top rod moves downward as a whole, the lower rod 6 first contacts the bottom surface of the packaging box 29 and pushes it to demold and move downward to the top of the stacked packaging boxes 29 on the tray 10. At this time, the lower rod 6 is subjected to a reaction force from the stacked packaging boxes 29, forcing the middle rod 7 to retract upward and compress the buffer spring 8. After the spring is compressed, the elastic force gradually increases, so that the pressure of the lower rod 6 on the stacked packaging boxes 29 increases gradually, rather than being an instantaneous rigid impact, thereby effectively protecting the edge of the topmost packaging box 29 from being crushed or deformed.

[0026] Reset Phase: When the push cylinder 3 drives the mounting plate 27 and the upper rod 4 to reset upwards, the compression of the buffer spring 8 gradually decreases, and its elastic force also drops steadily. During this process, the lower rod 6 remains in contact with the stacked packaging boxes 29, but the contact pressure gradually decreases rather than being released suddenly. Because the upward speed of the upper rod 4 is controllable, the spring will not spring open instantaneously. Instead, as the upper rod 4 rises, the middle rod 7 gradually extends from the sliding cavity 5. The pressure changes continuously throughout the process, without generating additional downward impact. When the lower rod 6 is completely detached from the stacked packaging boxes 29, the spring has essentially returned to its free length. At this point, there is no contact, so it will not cause any disturbance or scattering to the stacked packaging boxes 29.

[0027] Without the buffer spring 8, the lower rod 6 of the push rod would be in rigid contact with the stacked packaging boxes 29. When the push rod is pressed down, due to the fixed cylinder stroke, the lower rod 6 would impact the upper edge of the stacked packaging boxes 29 at a constant speed, which could easily cause damage to the boxes or misalignment in the stack. The presence of the buffer spring 8 transforms the rigid impact into elastic cushioning, significantly improving the stacking quality. At the same time, the smooth release of pressure during reset ensures the stability of the stack and prevents scattering.

[0028] In one feasible embodiment, an annular groove 9 is provided on the top rod at the middle position of the mounting plate 27. The annular groove 9 is located on the lower end of the lower rod 6. A sliding hole 11 is provided on the support plate 10 below the lower rod 6. A mounting hole 17 is provided on the sliding shaft 13 below the sliding hole 11. Several limiting rods 18 are provided circumferentially on the outer surface of the mounting hole 17. The limiting rods 18 are slidably connected to the side wall of the mounting hole 17. A wedge-shaped surface 20 is provided on the end of the limiting rod 18 located inside the mounting hole 17. The lowest point of the wedge-shaped surface 20 is located on the end of the limiting rod 18 located inside the mounting hole 17, and the wedge-shaped surface 20 is set towards the support plate 10. A limiting spring 19 is provided on the end of the limiting rod 18 located outside the mounting hole 17. The limiting spring 19 is sleeved on the limiting rod 18. One end of the limiting spring 19 is fixed to the sliding shaft 13, and the other end of the limiting spring 19 is fixed to the end of the limiting rod 18 located outside the mounting hole 17.

[0029] It is easy to understand that, since all the top rods can be retracted to a certain extent, when the pallet 10 gradually moves down to the limit position as the number of stacked packaging boxes 29 increases (at this time, the sliding shaft 13 below the pallet 10 has reached the bottom or is limited and cannot move down further), the push cylinder 3 drives the top rod to move down again (at this time, the operator or robot takes away the stacked packaging boxes 29). When the annular groove 9 at the lower end of the lower rod 6 in the middle approaches the mounting hole 17 at the upper end of the sliding shaft 13, the groove wall of the annular groove 9 first contacts the wedge-shaped surface 20 at the end of the limiting rod 18. Since the wedge-shaped surface 20 faces the pallet 10 and the lowest point is located at the inner end of the limiting rod 18, the downward pressing action of the annular groove 9 forces the limiting rod 18 to overcome the elastic force of the limiting spring 19 and slide outward along the side wall of the mounting hole 17 (i.e., retract) until the annular groove 9 completely passes the end of the limiting rod 18. Subsequently, the limiting spring 19 pushes the limiting rod 18 to reset, causing its end to engage in the annular groove 9, thus axially locking the push rod with the sliding shaft 13 (and consequently with the support plate 10). At this time, the remaining parts of the push rod are in contact with the support plate 10 and are compressed to accommodate the downward stroke of the push rod in the middle. Then, the pushing cylinder 3 reverses and resets (rises). Since the annular groove 9 and the limiting rod 18 are hooked together, the push rod drives the support plate 10 to move upward together until the support plate 10 returns to the initial height position below the raw material plate 28. Then, the operator pulls the limiting rod 18 outward to disengage the annular groove 9, and the lifting cylinder can reset to start the next cycle.

[0030] This mechanism enables automatic reset of the pallet 10 after it reaches its limit position, requiring no additional drive components or sensors. It features a compact structure and reliable operation. Through the cooperation of the annular groove 9 and the wedge-shaped surface 20 with the limiting rod 18, the push rod automatically locks during the downward pressing process and forcibly pulls the pallet 10 back to its initial height during reset, ensuring the stacking cycle can be restarted cyclically. Compared to manual reset or complex pneumatic / electric lifting mechanisms, this solution is low-cost, simple to maintain, and fully compatible with existing stepper downward movement, without affecting normal stacking accuracy. Simultaneously, the design of the limiting spring 19 and the wedge-shaped surface 20 ensures smooth locking and unlocking, preventing jamming or accidental triggering, and improving the automation level and production continuity of the equipment. In one feasible embodiment, a traction rope 23 is provided on one end of the limiting rod 18 outside the mounting hole 17. One end of the traction rope 23 is fixed to the limiting rod 18, and the other end of the limiting rod 18 is fixed to the mounting frame. A guide plate 21 is provided below the traction rope 23. One end of the guide plate 21 is fixed to the sliding shaft 13, and a guide block 22 is provided on the other end of the guide plate 21. One end of the guide block 22 is fixed to the guide plate 21, and a sliding hole 11 is provided on the other end of the guide block 22. The traction rope 23 is slidably connected in the sliding hole 11, and the sliding hole 11 is coaxially arranged with the limiting rod 18.

[0031] As the support plate 10 is driven upward to its initial position by the push rod, the sliding shaft 13 moves upward along with the support plate 10. The guide plate 21 and guide block 22 fixed on the sliding shaft 13 also rise synchronously. One end of the traction rope 23 is fixed to the outer end of the limiting rod 18, and the other end is fixed to the stationary mounting frame. The traction rope 23 passes horizontally through the sliding hole 11 on the guide block 22, which is coaxial with it. As the sliding shaft 13 moves upward, the distance between the guide block 22 and the lower end of the mounting frame increases. Since the total length of the traction rope 23 is fixed, the guide block 22 will move upward relative to the traction rope 23. This is equivalent to the length of the traction rope 23 between the guide block 22 and the limiting rod 18 being "tightened," thereby applying an outward pulling force to the limiting rod 18. This pulling force overcomes the elastic force of the limiting spring 19, pulling the limiting rod 18 outward along the side wall of the mounting hole 17, so that its end completely disengages from the annular groove 9 of the lower rod 6 of the push rod, achieving automatic unlocking. After that, the top rod can smoothly return to its original position and rise without moving the support plate 10. The support plate 10 is held at its initial height by its own weight or by the spring below, waiting for the next stacking cycle.

[0032] This mechanism utilizes the upward movement of the pallet 10 during reset as a power source. Through the cooperation of the traction rope 23 and the guide block 22, the vertical displacement is automatically converted into an outward pulling force on the limit rod 18, achieving reliable disengagement of the limit rod 18 from the annular groove 9. It requires no manual intervention, additional sensors, cylinders, or electromagnets, resulting in a simple structure and low cost. The unlocking action is completed synchronously with the reset process of the pallet 10, without increasing the cycle time, thus improving the automation level and operational stability of the equipment. Simultaneously, the traction rope 23 does not affect the downward movement of the pallet 10, and the guide block 22 and guide plate 21 ensure that the force applied by the traction rope 23 to the limit rod 18 is parallel to the axis of the limit rod 18, enhancing the pulling effect of the traction rope 23 on the limit rod 18.

[0033] In one feasible embodiment, the limit rod 18 has a rectangular cross-section. This rectangular design prevents the top rod from rotating, thus improving its usability.

[0034] In one feasible embodiment, a robotic arm is also provided on the mounting frame to transfer the stacked packaging boxes 29 on the pallet 10 to the conveyor belt. It should be noted that such robotic arms for material transfer, stacking, and handling are existing technology and are highly mature, general-purpose equipment in the field of industrial automation. A typical robotic arm system usually integrates an industrial robot body, an end effector (such as a gripper, suction cup gripper, or dedicated gripper), a conveyor line, a vision positioning system, and a PLC control system, capable of automatically identifying, gripping, handling, and stacking target materials according to a preset program. In this solution, after the pallet 10 is reset to its initial position below the raw material plate 28 and the stacking is completed, the control system sends a command to the robotic arm, which automatically grips the entire stack of packaging boxes 29 on the pallet 10 (preferably, a pallet is placed on the pallet 10, and the robot grips the pallet), smoothly transferring them to the conveyor belt for subsequent packaging or warehousing processes, thus achieving full automation from demolding and stacking to transfer. Further details are omitted here.

[0035] 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 feeding device for a mold used in the production of blister packaging boxes, characterized in that: The feeding device (34) includes a mounting frame, the upper part of which is provided with a top feeding component, and the lower part of which is provided with a receiving component. The top feeding component is used to push the formed packaging box (29) on the raw material plate (28) to detach, and the receiving component is used to stack several detached packaging boxes (29). The top material assembly includes a top push cylinder (3), which is fixed on the mounting frame. The output end of the top push cylinder (3) is provided with a mounting plate (27). The mounting plate (27) is provided with several evenly distributed top rods. One end of the top rod is fixed on the mounting plate (27), and the other end of the top rod is set towards the receiving assembly. The receiving assembly includes a mounting ring (12). The outer surface of the mounting ring (12) is provided with several fixing plates (24). The fixing plates (24) fix the mounting ring (12) to the mounting frame. The outer surface of the mounting ring (12) is provided with several sliding rods (15). The sliding rods (15) are slidably connected to the mounting ring (12). A retaining spring (16) is sleeved on the outward-facing portion of the sliding rod (15). One end of the retaining spring (16) is fixed to the mounting ring (12), and the other end of the retaining spring (16) is fixed to... On the outward end of the sliding rod (15), a sliding shaft (13) is provided in the middle of the mounting ring (12). Several sliding rods (15) abut against the sliding shaft (13). A support plate (10) is provided at the upper end of the sliding shaft (13). The support plate (10) is located directly below the top rod and is fixed on the sliding shaft (13). Several grooves are provided on the inner surface of the mounting ring (12). Several protrusions (14) are provided on the outer surface of the sliding shaft (13). The protrusions (14) are slidably disposed in the grooves. The top rod includes an upper rod (4), a lower rod (6) and a middle rod (7). The upper end of the upper rod (4) is fixed to the mounting plate (27). The lower end of the upper rod (4) is provided with a sliding cavity (5). The lower end of the middle rod (7) is fixed to the upper end of the lower rod (6). The upper end of the middle rod (7) is slidably connected to the sliding cavity (5). A buffer spring (8) is provided between the lower end of the upper rod (4) and the upper end of the lower rod (6). The buffer spring (8) is sleeved on the middle rod (7), and the two ends of the buffer spring (8) are respectively fixed to the outer surfaces of the upper rod (4) and the lower rod (6). An annular groove (9) is provided on the top rod at the middle position of the mounting plate (27). The annular groove (9) is located on the lower end of the lower rod (6). A sliding hole (11) is provided on the support plate (10) below the lower rod (6). A mounting hole (17) is provided on the sliding shaft (13) below the sliding hole (11). Several limiting rods (18) are provided circumferentially on the outer surface of the mounting hole (17). The limiting rods (18) are slidably connected to the side wall of the mounting hole (17). A wedge-shaped surface is provided on one end of the limiting rod (18) located inside the mounting hole (17). (20) The lowest point of the wedge-shaped surface (20) is located on one end of the limiting rod (18) inside the mounting hole (17), and the wedge-shaped surface (20) is set towards the support plate (10). A limiting spring (19) is provided on one end of the limiting rod (18) outside the mounting hole (17). The limiting spring (19) is sleeved on the limiting rod (18). One end of the limiting spring (19) is fixed on the sliding shaft (13), and the other end of the limiting spring (19) is fixed on one end of the limiting rod (18) outside the mounting hole (17). The limiting rod (18) is provided with a traction rope (23) at one end outside the mounting hole (17). One end of the traction rope (23) is fixed to the limiting rod (18), and the other end of the limiting rod (18) is fixed to the mounting frame. A guide plate (21) is provided below the traction rope (23). One end of the guide plate (21) is fixed to the sliding shaft (13), and a guide block (22) is provided at the other end of the guide plate (21). One end of the guide block (22) is fixed to the guide plate (21), and a sliding hole (11) is provided at the other end of the guide block (22). The traction rope (23) is slidably connected in the sliding hole (11), and the sliding hole (11) is coaxially arranged with the limiting rod (18).

2. The feeding device for a blister packaging box production mold according to claim 1, characterized in that: The cross-section of the limiting rod (18) is rectangular.

3. The feeding device for a blister packaging box production mold according to claim 1, characterized in that: The mounting frame is also equipped with a robotic arm, which is used to transfer the stacked packaging boxes (29) on the pallet (10) to the conveyor belt.

4. The feeding device for a blister packaging box production mold according to claim 1, characterized in that: The mounting frame includes four rectangular columns (1), with a crossbeam between adjacent columns (1). The two ends of the crossbeam are fixed to the adjacent columns (1), and a top plate (2) is provided at the upper end of the column (1). The push cylinder (3) is fixed to the top plate (2).

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