A waste edge cutting device for plastic packaging box processing

Abstract

This invention relates to the field of plastic packaging box processing technology, and discloses a waste edge trimming device for processing plastic packaging boxes. The device includes a main body, a frame connected to the main body, a crossbeam connected to the top of the frame, a servo motor mounted on the crossbeam, an output shaft connected to the servo motor, a rotating rod connected to the end of the output shaft, a support plate fixed in the frame, a guide assembly mounted on the support plate, a slider slidably fitted on the rotating rod, a connecting plate connected to the bottom of the slider, a cutting assembly mounted below the connecting plate, and a base mounted on the main body, with a centering assembly installed in the base. This invention features a replaceable guide assembly to adapt to the contours of packaging boxes of different specifications, matching the straight edges and rounded corners of the box for trajectory cutting. By changing the corresponding guide frame, it can adapt to plastic packaging boxes of different sizes and with different rounded corners. The centering assembly, using a dual-drive plate and an end-face ratchet, achieves automatic centering and step-by-step clamping of the plastic packaging box, improving the stability during box cutting.

Description

Technical Field

[0001] This invention belongs to the field of plastic packaging box processing technology, specifically, it relates to a waste edge trimming device for processing plastic packaging boxes. Background Technology

[0002] Plastic packaging boxes are commonly used containers for logistics and product packaging. After injection molding, the edges of the box body usually produce excess waste and burrs. In order to ensure that the packaging box has a neat shape, smooth surface and smooth assembly and use, it is necessary to cut off the waste edges around the box body and corners. Especially for plastic packaging boxes with rounded corners that are common in the market, it is necessary to cut off both straight edges and rounded corner contours completely to ensure the appearance quality of the packaging box and its normal use.

[0003] However, existing waste edge removal equipment can only perform simple cutting operations on right-angle boxes and cannot adapt to the rounded corner contour structure of plastic packaging boxes. The cutting trajectory is simple, and waste edge residue and incomplete removal are easy to occur at the rounded corner positions. Especially in the process of mass production, it is necessary to frequently change equipment or repeatedly adjust tooling, resulting in low overall processing efficiency.

[0004] In view of this, the present invention is proposed. Summary of the Invention

[0005] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0006] A waste edge trimming device for processing plastic packaging boxes includes a main body, a frame connected to the main body, a crossbeam connected to the top of the frame, a servo motor mounted on the crossbeam, an output shaft connected to the servo motor and passing through the crossbeam, a support plate fixed in the frame, a rotating groove on the support plate, a rotating rod connected to the end of the output shaft and rotatably mounted in the rotating groove, a guide assembly mounted on the support plate, a slider slidably fitted on the rotating rod and the slider slidingly adapted to the guide assembly, a connecting plate connected to the bottom of the slider, a cutting assembly mounted below the connecting plate, a base mounted on the main body, a straight groove on the base, a centering assembly mounted in the base, an mounting rod slidably mounted in the straight groove, and an extrusion plate mounted on the mounting rod.

[0007] In a preferred embodiment of the present invention, the guide assembly includes a left guide frame and a right guide frame, both of which are connected to a connecting seat. The connecting seat of the left guide frame has a positioning groove, and the connecting seat of the right guide frame has a positioning block connected to it. The positioning block cooperates with the positioning groove. Both the left and right guide frames have guide grooves, and the slider is connected to a guide rod, which is slidably installed in the guide groove.

[0008] In a preferred embodiment of the present invention, positioning plates are connected to the outer sides of both the left and right guide frames. A connecting hole is provided on the positioning plate, and a threaded rod is connected to the support plate. The threaded rod passes through the connecting hole, and a nut is threaded onto the threaded rod. The positioning plate is pressed and fixed to the support plate by the nut.

[0009] In a preferred embodiment of the present invention, the cutting assembly includes an electric push rod, a spindle motor, and a cutting head. The bottom of the connecting plate is connected to the electric push rod, the output end of the electric push rod is connected to the spindle motor, and the output end of the spindle motor is connected to the cutting head.

[0010] In a preferred embodiment of the present invention, the centering assembly includes a first drive plate, a second drive plate, a first end face ratchet, and a second end face ratchet. A drive motor is connected to the bottom of the base, and a rotating shaft is connected to the output end of the drive motor. The first drive plate and the first end face ratchet are assembled at the end of the rotating shaft. The second drive plate and the second end face ratchet are also rotatably mounted on the rotating shaft. The first end face ratchet and the second end face ratchet mesh with each other. A spring is movably sleeved on the outside of the rotating shaft, and the two ends of the spring abut against the bottom of the base and the second drive plate, respectively.

[0011] In a preferred embodiment of the present invention, two arc-shaped grooves are provided on both the first drive plate and the second drive plate, and a drive block is movably assembled in each arc-shaped groove. The upper end of the drive block is connected to the bottom end of the mounting rod.

[0012] In a preferred embodiment of the present invention, the top end of the mounting rod is connected to a mounting base, the back of the extrusion plate is provided with a movable groove, a movable block is connected to the mounting base, and the movable block is slidably installed in the movable groove.

[0013] In a preferred embodiment of the present invention, a sealing cover is provided in the straight groove of the base.

[0014] In a preferred embodiment of the present invention, the rotating rod has a sliding groove along the length of the rod body, and a slider is slidably installed in the sliding groove.

[0015] In a preferred embodiment of the present invention, the left guide frame and the right guide frame are both frame structures adapted to the outline of the packaging box.

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] This invention features a replaceable guide assembly to adapt to the contours of packaging boxes of different specifications. It matches the straight edges and rounded corners of the box body for trajectory cutting, solving the problems of incomplete removal of rounded corner waste edges and poor contour adaptability. The overall equipment does not require frequent tooling adjustments; it can adapt to plastic packaging boxes of different sizes and rounded corners simply by changing the corresponding guide frame. The centering assembly, which uses a dual drive plate and end face ratchet, achieves automatic centering and step-by-step clamping of the plastic packaging box, improving the stability of the box body during cutting.

[0018] The specific embodiments of the present invention will now be described in further detail with reference to the accompanying drawings. Attached Figure Description

[0019] In the attached diagram:

[0020] Figure 1 A 3D diagram of a waste edge trimming device for processing plastic packaging boxes;

[0021] Figure 2 A 3D view of the centering component of a waste edge trimming device for processing plastic packaging boxes;

[0022] Figure 3 A top view of the centering assembly of a waste edge trimming device for processing plastic packaging boxes;

[0023] Figure 4 Exploded view of the centering component of a waste edge trimming device for processing plastic packaging boxes;

[0024] Figure 5 A schematic diagram of the installation of the centering component of a waste edge trimming device for processing plastic packaging boxes;

[0025] Figure 6 An assembly diagram of the mounting base and extrusion plate for a waste edge trimming device used in the processing of plastic packaging boxes;

[0026] Figure 7 A 3D view of the guide assembly and cutting assembly of a waste edge trimming device for processing plastic packaging boxes;

[0027] Figure 8 Exploded view of the guide assembly and cutting assembly of a waste edge removal device for processing plastic packaging boxes;

[0028] Figure 9 A schematic diagram of the connection of the guide assembly of a waste edge trimming device for processing plastic packaging boxes.

[0029] In the diagram: 1. Body; 2. Frame; 3. Crossbeam; 4. Servo motor; 5. Output shaft; 6. Support plate; 7. Rotating groove; 8. Rotating rod; 9. Sliding groove; 10. Threaded rod; 11. Left guide frame; 12. Right guide frame; 13. Positioning plate; 14. Connecting hole; 15. Nut; 16. Connecting seat; 17. Positioning groove; 18. Positioning block; 19. Guide groove; 20. Guide rod; 21. Slider; 22. Connecting plate; 23. 24. Electric push rod; 25. Main spindle motor; 26. Cutting head; 27. Base; 28. Straight groove; 29. ​​Sealing cover; 30. Mounting rod; 31. Mounting seat; 32. Extrusion plate; 33. Moving groove; 34. Moving block; 35. First drive plate; 36. Second drive plate; 37. Arc groove; 38. First end face ratchet; 39. Second end face ratchet; 40. Rotating shaft; 41. Drive block; 42. Spring; 43. Drive motor. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention.

[0031] like Figures 1 to 9 As shown, a waste edge trimming device for processing plastic packaging boxes includes a body 1, a frame 2 connected to the body 1, a crossbeam 3 connected to the top of the frame 2, a servo motor 4 mounted on the crossbeam 3, an output shaft 5 connected to the servo motor 4, the output shaft 5 passing through the crossbeam 3, a support plate 6 fixed in the frame 2, a rotating groove 7 formed in the support plate 6, a rotating rod 8 connected to the end of the output shaft 5, the rotating rod 8 rotatably mounted in the rotating groove 7, a guide assembly mounted on the support plate 6, a slider 21 slidably fitted on the rotating rod 8, the slider 21 slidingly fitted with the guide assembly, a connecting plate 22 connected to the bottom of the slider 21, a cutting assembly mounted below the connecting plate 22, a base 26 also mounted on the body 1, a straight groove 27 formed in the base 26, a centering assembly mounted in the base 26, an mounting rod 29 slidably mounted in the straight groove 27, and an extrusion plate 31 mounted on the mounting rod 29. In this setup, the servo motor 4 drives the rotating rod 8 to rotate smoothly within the rotating groove 7 via the output shaft 5. During the rotation of the rotating rod 8, the slider 21 moves synchronously in a circular motion. The guide assembly then limits and constrains the movement trajectory of the slider 21, causing the slider 21 to drive the connecting plate 22 and the cutting assembly to move along a fixed contour path. At the same time, the centering assembly on the base 26 can drive the mounting rod 29 to slide along the straight groove 27, which, together with the extrusion plate 31, achieves the positioning and clamping of the plastic packaging box, providing stable workpiece support for subsequent contour-type waste edge cutting.

[0032] like Figures 1 to 9As shown, in a specific embodiment, the guide assembly includes a left guide frame 11 and a right guide frame 12. Both the left and right guide frames 11 and 12 are connected to a connecting seat 16. The connecting seat 16 of the left guide frame 11 has a positioning groove 17, and the connecting seat 16 of the right guide frame 12 has a positioning block 18 connected to it. The positioning block 18 cooperates with the positioning groove 17. Both the left and right guide frames 11 and 12 have guide grooves 19. A guide rod 20 is connected to the slider 21 and slidably installed within the guide groove 19. In this configuration, the left guide frame 11 and right guide frame 12 are aligned and fitted together by the positioning groove 17 and positioning block 18 on the connecting seat 16, forming a complete annular guide structure. When the slider 21 moves with the rotating rod 8, the guide rod 20 slides along the inside of the guide groove 19. The inner and outer contours of the guide groove 19 restrict the travel path of the guide rod 20, thereby limiting the movement trajectory of the slider 21 and the cutting assembly below, ensuring that the cutting path remains consistent with the outer contour of the plastic packaging box.

[0033] like Figures 1 to 9 As shown, furthermore, positioning plates 13 are connected to the outer sides of both the left guide frame 11 and the right guide frame 12. The positioning plates 13 have connecting holes 14, and threaded rods 10 are connected to the support plate 6. The threaded rods 10 pass through the connecting holes 14, and nuts 15 are threaded onto the threaded rods 10. The positioning plates 13 are pressed and fixed onto the support plate 6 by the nuts 15. In this configuration, after the left guide frame 11 and the right guide frame 12 are assembled, they are fitted onto the outside of the threaded rods 10 through the connecting holes 14 on the positioning plates 13. The threaded locking action of the nuts 15 and the threaded rods 10 presses the positioning plates 13 tightly against the end face of the support plate 6, achieving the overall installation of the guide frames. Simultaneously, loosening the nuts 15 allows for quick disassembly of the guide frames, facilitating the replacement of guide components with different profiles to fit different packaging boxes.

[0034] like Figures 1 to 9 As shown, the cutting assembly further includes an electric push rod 23, a spindle motor 24, and a cutting head 25. The electric push rod 23 is connected to the bottom of the connecting plate 22, the output end of the electric push rod 23 is connected to the spindle motor 24, and the output end of the spindle motor 24 is connected to the cutting head 25. In this configuration, the electric push rod 23 moves along the contour trajectory with the connecting plate 22. At the same time, the electric push rod 23 can extend and retract, driving the spindle motor 24 and the cutting head 25 to rise and fall, thereby adjusting the cutting height of the cutting head 25. The operation of the spindle motor 24 can drive the cutting head 25 to rotate at high speed, completing the continuous cutting and removal of edge waste while moving along the circumference of the housing.

[0035] like Figures 1 to 9As shown, the centering assembly further includes a first drive plate 34, a second drive plate 35, a first end face ratchet 37, and a second end face ratchet 38. A drive motor 42 is connected to the bottom of the base 26. A rotating shaft 39 is connected to the output end of the drive motor 42. The first drive plate 34 and the first end face ratchet 37 are assembled at the end of the rotating shaft 39. The second drive plate 35 and the second end face ratchet 38 are also rotatably mounted on the rotating shaft 39. The first end face ratchet 37 and the second end face ratchet 38 mesh with each other. A spring 41 is movably sleeved on the outside of the rotating shaft 39, and the two ends of the spring 41 abut against the bottom of the base 26 and the second drive plate 35, respectively. In this configuration, the drive motor 42 drives the first drive plate 34 and the first end face ratchet 37 to rotate synchronously through the rotating shaft 39. The first end face ratchet 37 and the second end face ratchet 38 mesh and drive the second drive plate 35 to rotate synchronously. The spring 41 provides elastic support to the second drive plate 35, keeping the two sets of end face ratchets in normal mesh. At the same time, it can generate compression and avoidance when subjected to axial thrust, realizing the step-by-step rotation and one-way locking effect of the drive plate.

[0036] like Figures 1 to 9 As shown, both the first drive plate 34 and the second drive plate 35 have two arc-shaped grooves 36, and each arc-shaped groove 36 is movably fitted with a drive block 40. The upper end of the drive block 40 is connected to the bottom end of the mounting rod 29. In this configuration, during the rotation of the first drive plate 34 and the second drive plate 35, the inner wall of the arc-shaped groove 36 pushes the drive block 40 to generate radial displacement, converting the rotational motion of the drive plate into the linear movement of the drive block 40, which in turn drives the mounting rod 29 to slide synchronously along the straight groove 27. By relying on the synchronous approach and separation of the four sets of mounting rods 29, the clamping and releasing actions on all sides of the packaging box are realized.

[0037] like Figures 1 to 9 As shown, further, a mounting base 30 is connected to the top of the mounting rod 29, and a moving groove 32 is provided on the back of the extrusion plate 31. A moving block 33 is connected to the mounting base 30, and the moving block 33 is slidably installed in the moving groove 32. In this configuration, when the mounting rod 29 drives the mounting base 30 and the extrusion plate 31 to move closer to the center of the box and clamp them, the moving block 33 can slide relative to the box along the moving groove 32, so that the extrusion plate 31 that is first attached to the box can adaptively limit and stop, without hindering the extrusion plates 31 in other directions from continuing to feed and move closer, ensuring that the four sides of the packaging box can be flat and centrally attached.

[0038] like Figures 1 to 9 As shown, a sealing cover 28 is further provided in the straight groove 27 of the base 26. In this configuration, the sealing cover 28 slides and extends with the mounting rod 29 to block and seal the opening of the straight groove 27, preventing the cutting debris and dust from falling into the straight groove 27 and preventing debris from jamming the sliding stroke of the mounting rod 29.

[0039] like Figures 1 to 9As shown, further, the rotating rod 8 has a sliding groove 9 along its length, and a slider 21 is slidably installed in the sliding groove 9. In this configuration, when the rotating rod 8 rotates, it drives the slider 21 to revolve, and at the same time, the slider 21 can slide freely along the length of the sliding groove 9. With the trajectory constraint of the guide component, the cutting component moves in accordance with the outer contour of the packaging box.

[0040] like Figures 1 to 9 As shown, the left guide frame 11 and the right guide frame 12 are both frame structures adapted to the outline of the packaging box. In this configuration, after the left guide frame 11 and the right guide frame 12 are assembled, they form a contour trajectory consistent with the straight edge and rounded corner of the plastic packaging box, constraining the travel path of the cutting component, adapting to the cutting of the entire circumference of the rounded corner box, and avoiding the situation where the rounded corner is not completely removed.

[0041] The implementation principle of the waste edge trimming device for processing plastic packaging boxes in this embodiment is as follows: After the device is started, the plastic packaging box to be trimmed is first placed in the center area of ​​the base 26, so that the packaging box is in a state of waiting to be centered. Then, the drive motor 42 is turned on, and the drive motor 42 starts to run and drives the rotating shaft 39 to rotate in the forward direction. The rotating shaft 39 synchronously drives the first drive plate 34 and the first end face ratchet 37 to rotate. Under the elastic support of the spring 41, the second end face ratchet 38 and the first end face ratchet 37 are tightly engaged, thereby driving the second end face ratchet 38 and the second drive plate 35 to rotate together. The arc grooves 36 on the first drive plate 34 and the second drive plate 35 follow the rotation of the plate body, continuously pushing the drive block 40 in the groove to move towards the center of the base 26. The drive block 40 drives the top mounting rod 29 to slide smoothly along the straight groove 27 on the base 26. The mounting rod 29 drives the top mounting seat 30 and the extrusion plate 31 to move towards the center synchronously. The first step is to clamp the left and right sides of the plastic packaging box. Once the extrusion plates 31 on both sides are fully against the side walls of the packaging box and cannot move further, the first end ratchet 37 continues to rotate. This will overcome the elastic force of the spring 41 and push the second end ratchet 38 downward. The second drive plate 35 then stops rotating and will not reverse under the one-way limit of the ratchet. The first drive plate 34 continues to rotate, pushing the remaining two sets of drive blocks 40, mounting rods 29, mounting bases 30 and extrusion plates 31 to continue moving towards the center. This allows the extrusion plates 31 on the front and rear sides to gradually press against the other sides of the packaging box. The moving groove 32 on the back of the extrusion plate 31 slides along the moving block 33 on the mounting base 30 to avoid movement interference between the extrusion plates 31. The sealing cover 28 in the straight groove 27 extends and retracts synchronously with the sliding of the mounting rod 29, sealing the opening of the straight groove 27 to prevent cutting debris from entering the groove and causing jamming. This completes the centering and secure clamping of the plastic packaging box.

[0042] After the packaging box is centered and clamped, the servo motor 4 on the crossbeam 3 is started. The servo motor 4 drives the output shaft 5 to rotate at a constant speed. The output shaft 5 drives the rotating rod 8 at the end to rotate stably in the rotating groove 7 of the support plate 6. The sliding groove 9 on the rotating rod 8 rotates synchronously with the plate. The slider 21 in the sliding groove 9 rotates synchronously under the drive of the rotating rod 8. The guide rod 20 on the slider 21 is embedded in the guide groove 19 of the left guide frame 11 and the right guide frame 12 and slides along the preset contour of the guide groove 19. Under the trajectory constraint of the guide groove 19, the guide rod 20 drives the slider 21 to make adaptive radial sliding along the sliding groove 9, so that the connecting plate 22 at the bottom of the slider 21 and the cutting component make matching movements according to the straight edge and rounded corner contour of the plastic packaging box. The corresponding left guide frame 11 and right guide frame 12 can be replaced according to the packaging box of different size and different rounded corner radius, and the cutting trajectory can be adjusted to adapt to different boxes.

[0043] Then the cutting assembly is started. The electric push rod 23 at the bottom of the connecting plate 22 extends and pushes the spindle motor 24 and the cutting head 25 downward to adjust the cutting head 25 to the cutting height matching the waste edge of the packaging box. At the same time, the spindle motor 24 starts and drives the cutting head 25 to rotate at high speed to continuously cut the waste edge of the packaging box. As the servo motor 4 continues to run, the cutting head 25 rotates around the complete outline of the packaging box, and completes the removal of the waste edge at the straight edge and rounded corner of the box in one go.

[0044] After the waste edge removal operation is completed, the electric push rod 23 retracts, driving the spindle motor 24 and the cutting head 25 to return to their original position. The servo motor 4 stops running, and the cutting action ends. Then, the drive motor 42 is controlled to rotate in the reverse direction, and the first drive plate 34 and the second drive plate 35 rotate synchronously in the reverse direction. The arc groove 36 drives the drive block 40, the mounting rod 29, the mounting base 30, and the extrusion plate 31 to slide outward along the straight groove 27, releasing the plastic packaging box. At this time, the packaging box with the waste edge removed is removed from the base 26. Then, the drive motor 42 rotates forward again, and the first drive plate 34... The second drive plate 35 drives the drive block 40 to move towards the center again. At this time, the front and rear extrusion plates 31 first tighten to the limit towards the center, while the left and right extrusion plates 31 do not tighten to the limit. The operator manually pushes the left and right extrusion plates 31 to tighten to the limit as well. Then, the drive motor 42 is controlled to rotate in the opposite direction. The first drive plate 34 and the second drive plate 35 are reset synchronously. The drive block 40, mounting rod 29, mounting base 30 and extrusion plate 31 slide completely outward along the straight groove 27 to complete the overall reset of the centering assembly.

[0045] When it is necessary to perform waste edge trimming on plastic packaging boxes of different specifications, first loosen the nut 15 on the threaded rod 10 to release the locking state between the positioning plate 13 and the support plate 6. Remove the original left guide frame 11 and right guide frame 12 from the support plate 6. Then place the left guide frame 11 and right guide frame 12, which are adapted to the new packaging box size and corner radius, into place. Make the connecting seat 16 on the left guide frame 11 and right guide frame 12 cooperate with the positioning block 18 through the positioning groove 17 to position each other. At the same time, make the connecting hole 14 on the positioning plate 13 fit into the threaded rod 10 on the support plate 6. Then tighten the nut 15 to press and fix the positioning plate 13 on the support plate 6. The replacement of the guide assembly is completed, which can adapt to packaging boxes of different sizes and corner radii, and realize diversified waste edge trimming processing.

[0046] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A waste edge trimming device for processing plastic packaging boxes, comprising a body (1), characterized in that, A frame (2) is connected to the main body (1). A crossbeam (3) is connected to the top of the frame (2). A servo motor (4) is installed on the crossbeam (3). An output shaft (5) is connected to the servo motor (4). The output shaft (5) passes through the crossbeam (3). A support plate (6) is fixed in the frame (2). A rotating groove (7) is opened on the support plate (6). A rotating rod (8) is connected to the end of the output shaft (5). The rotating rod (8) is rotatably installed in the rotating groove (7). A guide is installed on the support plate (6). The rotating rod (8) is slidably fitted with a slider (21), which is slidably adapted to the guide component. The bottom of the slider (21) is connected to a connecting plate (22), and a cutting component is installed below the connecting plate (22). A base (26) is also installed on the body (1). A straight groove (27) is opened on the base (26), and a centering component is installed in the base (26). An installation rod (29) is slidably installed in the straight groove (27), and an extrusion plate (31) is assembled on the installation rod (29).

2. The waste edge trimming equipment for processing plastic packaging boxes according to claim 1, characterized in that, The guiding assembly includes a left guide frame (11) and a right guide frame (12). Both the left guide frame (11) and the right guide frame (12) are connected to a connecting seat (16). The connecting seat (16) of the left guide frame (11) is provided with a positioning groove (17). The connecting seat (16) of the right guide frame (12) is connected to a positioning block (18). The positioning block (18) cooperates with the positioning groove (17). Both the left guide frame (11) and the right guide frame (12) are provided with a guide groove (19). The slider (21) is connected to a guide rod (20). The guide rod (20) is slidably installed in the guide groove (19).

3. The waste edge trimming equipment for processing plastic packaging boxes according to claim 2, characterized in that, The left guide frame (11) and the right guide frame (12) are both connected to a positioning plate (13). The positioning plate (13) has a connecting hole (14). The support plate (6) is connected to a threaded rod (10). The threaded rod (10) passes through the connecting hole (14). The threaded rod (10) is threaded with a nut (15). The positioning plate (13) is pressed and fixed on the support plate (6) by the nut (15).

4. The waste edge trimming equipment for processing plastic packaging boxes according to claim 1, characterized in that, The cutting assembly includes an electric push rod (23), a spindle motor (24), and a cutting head (25). The bottom of the connecting plate (22) is connected to the electric push rod (23), the output end of the electric push rod (23) is connected to the spindle motor (24), and the output end of the spindle motor (24) is connected to the cutting head (25).

5. The waste edge trimming equipment for processing plastic packaging boxes according to claim 1, characterized in that, The centering assembly includes a first drive plate (34), a second drive plate (35), a first end face ratchet (37), and a second end face ratchet (38). A drive motor (42) is connected to the bottom of the base (26). A rotating shaft (39) is connected to the output end of the drive motor (42). The first drive plate (34) and the first end face ratchet (37) are mounted at the end of the rotating shaft (39). The second drive plate (35) and the second end face ratchet (38) are also rotatably mounted on the rotating shaft (39). The first end face ratchet (37) and the second end face ratchet (38) mesh with each other. A spring (41) is movably sleeved on the outside of the rotating shaft (39), and the two ends of the spring (41) abut against the bottom of the base (26) and the second drive plate (35) respectively.

6. The waste edge trimming equipment for processing plastic packaging boxes according to claim 5, characterized in that, The first drive plate (34) and the second drive plate (35) each have two arc-shaped grooves (36), and each arc-shaped groove (36) is movably fitted with a drive block (40), the upper end of the drive block (40) is connected to the bottom end of the mounting rod (29).

7. The waste edge trimming equipment for processing plastic packaging boxes according to claim 1, characterized in that, The top of the mounting rod (29) is connected to the mounting base (30), and the back of the extrusion plate (31) is provided with a moving groove (32). The mounting base (30) is connected to a moving block (33), and the moving block (33) is slidably installed in the moving groove (32).

8. The waste edge trimming equipment for processing plastic packaging boxes according to claim 1, characterized in that, A sealing cover (28) is provided in the straight groove (27) of the base (26).

9. The waste edge trimming equipment for processing plastic packaging boxes according to claim 1, characterized in that, The rotating rod (8) has a sliding groove (9) along the length of the rod body, and a slider (21) is slidably installed in the sliding groove (9).

10. A waste edge trimming device for processing plastic packaging boxes according to claim 2, characterized in that, The left guide frame (11) and the right guide frame (12) are both frame structures adapted to the outline of the packaging box.

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