A kind of opening device for plastic packaging box processing

Abstract

The utility model relates to a kind of opening device for plastic packaging box processing, including the mounting bracket being set to opening device, adjustable height's support frame is provided on the mounting bracket, the punch assembly for blanking handle groove is provided on the support frame, the ejector assembly for ejecting plastic sheet is provided on the support frame.This opening device for plastic packaging box processing, through the guiding track retraction of blanking die along support plate, limit plate by air cylinder, top plate keeps fixed position, and blanking die forms relative displacement, continuously extruding internal residual waste and ejecting it, to prevent the buffer layer formed by waste accumulation, ensure that blanking force is always transmitted in shear mode, soft plastic notch is not thinning, fatigue resistance is stable, hard plastic edge is not micro-crack, avoid handle groove bearing fracture risk from the root, and realize blanking and clear waste integrated automation, further improve production efficiency.

Description

Technical Field

[0001] This utility model relates to the field of plastic packaging box processing technology, specifically to an opening device for processing plastic packaging boxes. Background Technology

[0002] Plastic packaging boxes are widely used in logistics, food packaging, and industrial storage due to their advantages such as being lightweight, durable, and cost-controllable. The core processes of plastic packaging box production and processing include raw material processing, molding, post-processing, testing, and packaging. Post-processing includes trimming and deburring, surface treatment, and hole drilling. In the hole drilling process, drilling equipment is used to process precision holes, ventilation holes, and mounting positioning holes on plastic packaging boxes, while punching equipment is used for medium and large diameter holes on plastic packaging boxes.

[0003] In the current technology, the punching equipment used for processing plastic packaging boxes consists of a punching machine, cylinder, punch, positioning seat, and discharge structure. The plastic packaging box is fitted onto the positioning seat, and the cylinder is started to drive the punch to feed towards the plastic packaging box. The cutting edge on the punch punches the plastic box body to form a handle groove. In practical applications, to improve the punching efficiency of handle grooves on plastic boxes, punching is usually performed simultaneously from both sides. After the cutting edge of the punch punches the plastic box, the plastic sheet produced by punching remains inside the punch. As the number of punching operations increases, the amount of plastic sheet inside the punch increases. The stacked plastic sheet forms a buffer layer between the punch cutting edge and the plastic box, causing the punching force to be unable to be transmitted to the material instantly. This causes the plastic to change from shearing to tensile tearing. If it is a soft plastic, the groove edge becomes thinner, and the fatigue resistance decreases. If it is a hard plastic, micro-cracks appear at the edge. When under load, the cracks expand, causing the handle groove to break. Therefore, an opening device for processing plastic packaging boxes is proposed to solve the above problems. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides an opening device for processing plastic packaging boxes. It features automatic cleaning of plastic sheets generated during punching, solving the problem that in practical use, to improve the punching efficiency of handle grooves on plastic boxes, simultaneous punching from both sides is typically employed. After the punching edge cuts the plastic box, plastic sheets remain inside the punch. As the number of punching cycles increases, the amount of plastic sheets inside the punch also increases. The stacked plastic sheets form a buffer layer between the punch edge and the plastic box, preventing the punching force from being instantly transmitted to the material. This causes the plastic to change from shearing to tensile tearing. If the plastic is soft, the groove edge becomes thinner, reducing fatigue resistance; if the plastic is hard, micro-cracks appear at the edge, and these cracks expand under load, leading to handle groove breakage.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a hole-opening device for processing plastic packaging boxes, comprising a mounting bracket disposed on the hole-opening device, an adjustable height support frame disposed on the mounting bracket, a punch assembly for punching handle grooves disposed on the support frame, and an ejection assembly for ejecting plastic sheets disposed on the support frame. The punch assembly includes a blanking die slidably mounted on a support frame. The blanking die has four limiting grooves. A cylinder for controlling the feeding of the blanking die is mounted on the support frame, and the telescopic end of the cylinder is fixedly connected to the blanking die. The ejection assembly includes a linkage plate slidably mounted on a support frame. A threaded sleeve is fixedly mounted on the linkage plate. Guide rods are fixedly mounted at the ends of the two protrusions of the linkage plate. One end of the two guide rods is fixedly connected to a top plate located inside the punching die, and one side of the top plate is flush with the cutting edge of the punching die. The support frame is provided with a threaded rod for controlling the movement of the top plate, and the threaded rod is threadedly connected to the threaded sleeve.

[0006] Furthermore, the support frame also includes a connecting plate, on one side of which two support plates are fixedly installed, and the punching die is located between the two support plates. A frame is fixedly installed on the top support plate, and a threaded rod is rotatably installed on the frame. The linkage plate is slidably connected to the inner wall of the frame.

[0007] Furthermore, two guide grooves are provided on the top support plate, and the two protrusions of the linkage plate pass through the two guide grooves and the two top limiting grooves respectively, and the protrusions of the linkage plate are slidably connected with the corresponding guide grooves.

[0008] Furthermore, two limiting plates are fixedly installed between the two support plates, and the two limiting plates pass through two limiting grooves on the same side respectively. The limiting plates on the same side are slidably connected to the two limiting grooves on the same side. One end of the two guide rods passes through the two limiting plates respectively, and the guide rods on the same side are slidably connected to the limiting plates on the same side.

[0009] Furthermore, the mounting bracket includes a base plate, and two vertical plates are fixedly mounted on the top of the base plate. Each of the two vertical plates has several mounting holes, and bolts that pass through the mounting holes and are used to fix the position of the connecting plate are installed on the two vertical plates.

[0010] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. This punching device for processing plastic packaging boxes uses a cylinder to drive the punching die to retract along the guide trajectory of the support plate and the limiting plate. The top plate remains in a fixed position and forms a relative displacement with the punching die, continuously squeezing out the internal residual waste material and pushing it out. This eliminates the buffer layer formed by the accumulation of waste material, ensuring that the punching force is always transmitted in a shearing mode. The soft plastic groove does not thin and has stable fatigue resistance, while the hard plastic edge is free of micro-cracks, thus avoiding the risk of the handle groove breaking under load from the root. 2. This hole-opening device for processing plastic packaging boxes involves rotating a threaded rod, which drives a threaded sleeve and a linkage plate to slide along a guide groove through a threaded engagement. The linkage plate pushes the top plate to move through the guide rod until the top plate is flush with the cutting edge of the punching die. It is suitable for plastic thickness. For plastic boxes of different thicknesses, rotating the threaded rod can finely adjust the extension length of the top plate to ensure waste removal effect. It is suitable for waste materials of different thicknesses and does not require replacement of the punching die or ejector components. 3. This punching device for processing plastic packaging boxes uses a cylinder to drive the punching die downward along the support plate and limit plate to quickly complete the shearing and punching of the handle groove. The waste material naturally enters the punching die. After the punching is completed, the cylinder automatically retracts. When the punching die moves upward, the top plate automatically ejects the waste material. No manual intervention or additional operation is required, realizing the integrated automation of punching and waste removal, further improving production efficiency. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model; Figure 2 This is a schematic diagram of the structure of the present utility model. Figure 1 A sectional view; Figure 3 This is a schematic diagram of the structure of the present utility model. Figure 1 Rear view; Figure 4 This is an exploded view of the structural support frame and punch assembly of this utility model; Figure 5 This is an exploded view of the punch assembly and ejection assembly of this utility model. Figure 6 This is an exploded view of the structural support frame and the ejector assembly of this utility model.

[0012] In the diagram: 1. Mounting bracket; 11. Base plate; 12. Vertical plate; 13. Mounting hole; 14. Bolt; 2. Support frame; 21. Connecting plate; 22. Support plate; 221. Guide groove; 222. Limiting plate; 23. Frame; 24. Threaded rod; 3. Punch assembly; 31. Blanking die; 32. Limiting groove; 33. Cylinder; 4. Ejection assembly; 41. Linkage plate; 42. Threaded sleeve; 43. Guide rod; 44. Top plate. Detailed Implementation

[0013] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0014] Example 1: Please refer to Figure 1-6 The hole-opening device for processing plastic packaging boxes in this embodiment includes a mounting bracket 1 disposed on the hole-opening device, an adjustable height support frame 2 disposed on the mounting bracket 1, a punch assembly 3 for punching handle grooves disposed on the support frame 2, and an ejection assembly 4 for ejecting plastic sheets disposed on the support frame 2.

[0015] Example 2: Please refer to Figure 1-6 Based on Embodiment 1, the punch assembly 3 includes a punching die 31 that is slidably mounted on the support frame 2. The punching die 31 has four limiting grooves 32. The support frame 2 is equipped with a cylinder 33 for controlling the feed of the punching die 31, and the telescopic end of the cylinder 33 is fixedly connected to the punching die 31. The ejection assembly 4 includes a linkage plate 41 that is slidably mounted on the support frame 2. A threaded sleeve 42 is fixedly mounted on the linkage plate 41. Guide rods 43 are fixedly mounted at the ends of the two protrusions of the linkage plate 41. One end of the two guide rods 43 is fixedly connected to a top plate 44 located inside the punching die 31, and one side of the top plate 44 is flush with the cutting edge of the punching die 31. The support frame 2 is provided with a threaded rod 24 for controlling the movement of the top plate 44, and the threaded rod 24 is threadedly connected to the threaded sleeve 42.

[0016] It should be noted that the punch assembly (3) is responsible for punching the handle groove, and the ejection assembly (4) automatically ejects the scrap when the punching die (31) retracts through pre-adjustment positioning. The threaded rod (24) and the threaded sleeve (42) cooperate to achieve fine adjustment of the position of the top plate (44) to adapt to different scrap thicknesses, realize the integration of punching and automatic scrap removal functions, eliminate the need for additional scrap removal process, simplify the production process, and improve production efficiency while ensuring punching quality.

[0017] The support frame 2 also includes a connecting plate 21. Two support plates 22 are fixedly installed on one side of the connecting plate 21, and the punching die 31 is located between the two support plates 22. A frame 23 is fixedly installed on the top support plate 22, and the threaded rod 24 is rotatably installed on the frame 23. The linkage plate 41 is slidably connected to the inner wall of the frame 23.

[0018] It should be noted that the two support plates (22) form the moving track of the punching die (31), restricting its up and down movement trajectory. The frame (23) provides rotational support for the threaded rod (24) and at the same time constrains the sliding direction of the linkage plate (41), ensuring the verticality and positioning accuracy of the punching die (31) during punching, while ensuring the smooth ejection action of the top plate (44) and avoiding deviation or jamming when the scrap is ejected.

[0019] In addition, two guide grooves 221 are provided on the top support plate 22, and the two protrusions of the linkage plate 41 pass through the two guide grooves 221 and the two top limiting grooves 32 respectively. The protrusions of the linkage plate 41 are slidably connected with the corresponding guide grooves 221.

[0020] It should be noted that the protrusion of the linkage plate (41) penetrates the guide groove (221) of the support plate (22) and the limiting groove (32) of the punching die (31), which not only provides sliding guidance for the linkage plate (41), but also ensures that the movement of the punching die (31) and the linkage plate (41) avoids each other. When the punching die (31) punches, the linkage plate (41) remains stationary and does not interfere. When the punching die (31) retracts, the top plate (44) driven by the linkage plate (41) can be accurately aligned with the waste position, ensuring the waste removal effect.

[0021] Example 3: Please refer to Figure 1-6 Based on Embodiment 2, two limiting plates 222 are fixedly installed between the two support plates 22, and the two limiting plates 222 respectively pass through the two limiting grooves 32 on the same side. The limiting plates 222 on the same side are slidably connected to the two limiting grooves 32 on the same side. One end of the two guide rods 43 respectively passes through the two limiting plates 222, and the guide rods 43 on the same side are slidably connected to the limiting plates 222 on the same side.

[0022] It should be noted that the limiting plate (222) passes through the limiting groove (32) of the blanking die (31) to constrain the lateral displacement of the blanking die (31). The guide rod (43) passes through the limiting plate (222) and is provided with additional support by the limiting plate (222) to prevent the top plate (44) from tilting when it is ejected. The multiple limiting design makes the blanking die (31) more accurate. The guide rod (43) and the limiting plate (222) work together to ensure that the top plate (44) is subjected to uniform force, the scrap is ejected more smoothly, and the equipment remains stable when it is operating at high speed continuously.

[0023] The mounting bracket 1 includes a base plate 11, and two vertical plates 12 are fixedly installed on the top of the base plate 11. Each of the two vertical plates 12 has several mounting holes 13, and bolts 14 that pass through the mounting holes 13 and are used to fix the position of the connecting plate 21 are installed on the two vertical plates 12.

[0024] It should be noted that by loosening or tightening the bolts (14), the installation position of the support frame (2) on the vertical plate (12) can be adjusted, and multiple height levels can be fixed by using multiple mounting holes (13). The adjustment operation is simple and convenient, without the need for complicated tools, and can be quickly adapted to the production of plastic packaging boxes of different sizes, reducing equipment replacement costs and improving the flexibility of the production line.

[0025] The working principle of the above embodiments is as follows: This hole-opening device for processing plastic packaging boxes, when in use: Loosen the bolts (14), move the support frame (2) up and down according to the height requirements of the handle groove of the plastic packaging box, align it with the corresponding mounting hole (13) on the vertical plate (12), tighten the bolts (14), lock the position of the support frame (2), and ensure that the cutting edge of the punching die (31) is aligned with the position to be punched. Rotate the threaded rod (24), and through the threaded engagement between the threaded rod (24) and the threaded sleeve (42), drive the linkage plate (41) to slide along the inner wall of the frame (23) and the guide groove (221). The linkage plate (41) drives the top plate (44) to move through the guide rod (43) until one side of the top plate (44) is flush with the cutting edge of the punching die (31), which is suitable for the thickness of the plastic to be punched, and ensures that the subsequent waste removal is thorough. Start the cylinder (33), and the telescopic end of the cylinder (33) pushes the punching die (31) to move along the support plate (22) towards the plastic packaging box. The cutting edge of the punching die (31) contacts the plastic box body and completes the punching of the handle groove under the action of shearing force. The plastic waste generated by punching naturally enters the interior of the punching die (31). After the punching reaches the preset stroke, the cylinder (33) stops feeding and prepares to retract. The cylinder (33) starts the retraction program, driving the punching die (31) to return to the initial position along the guide trajectory of the limit plate (222) and the support plate (22). Since the top plate (44) has been fixed in the matching position through the pre-adjustment, when the punching die (31) retracts upward, the top plate (44) generates a relative displacement with respect to the punching die (31), and gradually penetrates into the interior of the punching die (31). After the top plate (44) comes into contact with the residual plastic waste inside the punching die (31), as the punching die (31) continues to retract, the top plate (44) generates a continuous squeezing force on the waste. When the punching die (31) retracts to the initial position, the top plate (44) completely pushes the waste out of the punching die (31), and the waste falls off under the action of gravity, thereby completing the purpose of automatic waste removal.

[0026] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0027] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A perforation device for processing plastic packaging boxes, comprising a mounting bracket (1) disposed on the perforation device, characterized in that: The mounting bracket (1) is provided with an adjustable height support frame (2), the support frame (2) is provided with a punch assembly (3) for punching handle grooves, and the support frame (2) is provided with an ejection assembly (4) for ejecting plastic sheets. The punch assembly (3) includes a punching die (31) slidably mounted on a support frame (2). The punching die (31) has four limiting grooves (32). The support frame (2) is equipped with a cylinder (33) for controlling the feed of the punching die (31), and the telescopic end of the cylinder (33) is fixedly connected to the punching die (31). The ejection assembly (4) includes a linkage plate (41) slidably mounted on the support frame (2), a threaded sleeve (42) is fixedly mounted on the linkage plate (41), and guide rods (43) are fixedly mounted at the ends of the two protrusions of the linkage plate (41). One end of the two guide rods (43) is fixedly connected to a top plate (44) located inside the punching die (31), and one side of the top plate (44) is flush with the cutting edge of the punching die (31). The support frame (2) is provided with a threaded rod (24) for controlling the movement of the top plate (44), and the threaded rod (24) is threadedly connected to the threaded sleeve (42).

2. The hole-opening device for processing plastic packaging boxes according to claim 1, characterized in that: The support frame (2) also includes a connecting plate (21), on one side of the connecting plate (21) two support plates (22) are fixedly installed, and the punching die (31) is located between the two support plates (22). A frame (23) is fixedly installed on the top support plate (22), and a threaded rod (24) is rotatably installed on the frame (23). The linkage plate (41) is slidably connected to the inner wall of the frame (23).

3. The hole-opening device for processing plastic packaging boxes according to claim 2, characterized in that: The top support plate (22) has two guide grooves (221), and the two protrusions of the linkage plate (41) pass through the two guide grooves (221) and the two top limiting grooves (32), respectively. The protrusions of the linkage plate (41) are slidably connected to the corresponding guide grooves (221).

4. The hole-opening device for processing plastic packaging boxes according to claim 2, characterized in that: Two limiting plates (222) are fixedly installed between the two support plates (22), and the two limiting plates (222) pass through the two limiting grooves (32) on the same side respectively. The limiting plates (222) on the same side are slidably connected to the two limiting grooves (32) on the same side. One end of the two guide rods (43) passes through the two limiting plates (222) respectively, and the guide rods (43) on the same side are slidably connected to the limiting plates (222) on the same side.

5. The hole-opening device for processing plastic packaging boxes according to claim 2, characterized in that: The mounting bracket (1) includes a base plate (11), and two vertical plates (12) are fixedly installed on the top of the base plate (11). Each of the two vertical plates (12) has several mounting holes (13), and bolts (14) that pass through the mounting holes (13) and are used to fix the position of the connecting plate (21) are installed on the two vertical plates (12).

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