A corner sealing device for paper product packaging

Abstract

The utility model discloses an edge corner edge sealing device for paper product packaging, and relates to the technical field of edge corner edge sealing device, including base assembly, the base assembly includes work head, a plurality of moving rollers are rotationally connected to the middle part of work head top, one side fixed mounting of work head top is provided with the limiting strip, the limiting strip top fixed mounting has the side plate, the side plate top middle part is equipped with the edge sealing subassembly, and one end of side plate top is equipped with the glue supply subassembly, the glue supply subassembly is equipped with the glue cutting subassembly between the edge sealing subassembly, the edge sealing subassembly includes the pressing strip, the pressing strip fixed mounting is in the middle part of side plate top one side, the pressing strip one end towards glue supply subassembly is equipped with the head of a rivet, the pressing strip one side towards side plate fixed mounting has the guide strip, and the guide strip one end is equipped with the fixing frame, the utility model discloses, can efficiently to the edge corner of carton and seal the edge, is favorable to the improvement efficiency, has higher practical value.

Description

Technical Field

[0001] This utility model relates to the technical field of edge sealing devices, specifically an edge sealing device for paper product packaging. Background Technology

[0002] Edge sealing of paper products refers to the process of reinforcing and sealing the edges or corners of cardboard boxes or other paper packaging materials. The main purpose of this process is to enhance the structural strength of the paper products and prevent damage caused by collisions, stacking, etc., during handling, transportation, and storage. At the same time, edge sealing also provides moisture and water protection and improves the overall aesthetics of the packaging.

[0003] Based on the above, the inventors have discovered the following problems: Currently, the corner sealing of cardboard boxes is mainly done manually using tape. This sealing method is rather cumbersome, requiring the tape to be cut to a certain length and then pasted in the appropriate position, which is inconvenient to use.

[0004] Therefore, in view of this, we have studied and improved the existing structure and its shortcomings, and provided a corner sealing device for paper product packaging, in order to achieve a more practical purpose. Utility Model Content

[0005] The purpose of this utility model is to provide a corner sealing device for paper product packaging to solve the problems mentioned in the background art.

[0006] An edge sealing device for paper product packaging includes a base assembly. The base assembly includes a worktable. Several movable rollers are rotatably connected to the top center of the worktable. A limit strip is fixedly installed on one side of the top of the worktable. A side plate is fixedly installed on the top of the limit strip. An edge sealing assembly is provided at the top center of the side plate, and a glue supply assembly is provided at one end of the top of the side plate. A glue cutting assembly is provided between the edge sealing assembly and the glue supply assembly. The edge sealing assembly includes a pressure strip. The pressure strip is fixedly installed on one side of the top center of the side plate. The pressure strip has a raised end facing the glue supply assembly. A guide strip is fixedly installed on the side of the pressure strip facing the side plate. A fixing frame is provided at one end of the guide strip. Second guide holes are opened at both ends of the fixing frame. A second guide rod is slidably connected inside the second guide holes. A shaft seat is fixedly installed at one end of the second guide rod. A conforming roller is rotatably connected between the two shaft seats. A push spring is provided between the shaft seat and the fixing frame.

[0007] By adopting the above technical solution, the moving roller facilitates the sliding of the carton on the top of the workbench; the limiting strip facilitates the limiting and guiding of the carton's movement; the sealing assembly facilitates sealing the carton's corners; the side plate provides a mounting base for the glue supply assembly, glue cutting assembly, and sealing assembly; the glue supply assembly facilitates the supply of tape for sealing the carton's corners; the glue cutting assembly facilitates the cutting of the tape; and the pressure strip facilitates the tight adhesion of the tape on the top of the carton to the top of the carton. The design facilitates guiding the carton and tape into the bottom of the pressure strip. The guide strip facilitates folding the tape downwards on the top side of the carton, allowing the tape to adhere to the side and seal the corners of the carton. The fixing frame provides a mounting base for the flattening roller. The second guide rod limits and guides the movement of the flattening roller. The push spring provides thrust to the flattening roller, ensuring it fits tightly against the top side of the carton, thus sealing the corners of the carton.

[0008] Furthermore, the adhesive supply assembly includes a mounting base, a damping roller is rotatably connected to one side of the mounting base, and an edge sealing tape is sleeved on the outer side of the damping roller.

[0009] By adopting the above technical solution, the damping roller facilitates the fixed installation of the edge sealing tape on the top of the side plate, making it convenient to supply tape for the operation of the device. The damping roller can also provide damping and limit the rotation speed of the edge sealing tape, so that the edge sealing tape has tension and can be tightened.

[0010] Furthermore, a screw hole is provided in the middle of one end of the damping roller, and a screw rod is threaded inside the screw hole. A fixing block is fixedly installed at one end of the screw rod.

[0011] By adopting the above technical solution and using the screw rod, the fixing block can be easily disassembled and installed, thus facilitating the removal and replacement of the edge sealing tape.

[0012] Furthermore, a mounting bracket is fixedly installed on the top of the side plate, and a first guide rail is provided on one side of the top of the side plate.

[0013] By adopting the above technical solution, the installation of the mounting frame and the first guide rail facilitates the provision of an installation foundation for the rubber cutting assembly.

[0014] Furthermore, the rubber cutting assembly includes a second telescopic rod, which is fixedly installed inside the mounting frame. A movable seat is fixedly installed at the output end of the second telescopic rod, and the movable seat is slidably connected to the first guide rail.

[0015] By adopting the above technical solution, the second telescopic rod facilitates the adhesion of the tape end to the top of the carton when the first end of the carton moves between the fixed roller and the glue supply assembly. The operation of the second telescopic rod drives the cutting blade and the fixed roller to retract into the first guide track, avoiding obstruction to the movement of the carton. The adhesion between the tape and the fixed roller is less than that between the tape and the surface of the carton, allowing the tape to detach from the fixed roller during the retraction process.

[0016] Furthermore, a cutting blade is fixedly installed on one side of the movable seat, and several fixed rollers are rotatably connected to the other side of the movable seat. The rotation axis of the fixed rollers is perpendicular to the extension and retraction direction of the second telescopic rod.

[0017] By adopting the above technical solution, the setting of the cutting blade and the fixed roller makes it convenient for the moving seat to extend the cutting blade and the fixed roller when the tail end of the carton moves to the bottom end of the pressure roller. The carton moves further forward, and the pressure roller presses down on the tape, so that the cutting blade cuts the tape and sticks the end of the tape to the fixed roller, which makes it convenient for the sealing tape to seal the corners of the next carton.

[0018] Furthermore, the rubber cutting assembly also includes a third telescopic rod, the output end of which is fixedly equipped with a lifting frame.

[0019] By adopting the above technical solution and setting the third telescopic rod, it is easy to move the lifting frame up and down.

[0020] Furthermore, a pressure spring is fixedly installed at the middle of the bottom end of the lifting frame, and a rotating seat is fixedly installed at the other end of the pressure spring. A pressure roller is rotatably connected inside the rotating seat.

[0021] By adopting the above technical solution, the setting of the pressure spring facilitates the provision of elastic force to push the pressure roller downward, so that the pressure roller tightly adheres the tape to the top of the carton, and can also cooperate with the tape cutting component to cut the tape after the corner sealing is completed.

[0022] Furthermore, a first guide rod is fixedly installed at both ends of the top of the rotating seat, and a first guide hole is opened at both ends of the lifting frame, with the first guide rod slidably connected to the first guide hole.

[0023] By adopting the above technical solution, the first guide rod facilitates the guidance and limitation of the movement of the rotating seat.

[0024] Furthermore, the limiting strip is provided with a second guide rail in the middle and on one side. A first telescopic rod is fixedly installed in the middle of one end of the second guide rail. A stop block is fixedly installed at the output end of the first telescopic rod. The stop block is slidably connected to the second guide rail. An ultrasonic sensor is fixedly installed on one side of the side plate.

[0025] By adopting the above technical solution, the setting of two first telescopic rods and an ultrasonic sensor facilitates the ultrasonic sensor to monitor the position of the carton. The first telescopic rod at the bottom of the glue cutting assembly extends the stop block to limit the carton and make the tape adhere to the beginning of the carton. At the same time, the second telescopic rod drives the moving seat to retract. After the retraction is completed, the first telescopic rod retracts, and the other first telescopic rod extends the stop block to limit the movement of the carton. When the end of the carton moves to the bottom of the pressure roller, it stops and waits for the second telescopic rod to drive the moving seat to extend the cutting blade and the fixed roller, so as to facilitate the cutting of the sealing tape.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows: the movable roller facilitates the sliding of the carton on the top of the workbench; the limiting strip facilitates the limiting and guiding of the carton's movement, making it convenient for the sealing assembly to seal the corners of the carton; the side plate facilitates the provision of an installation base for the glue supply assembly, glue cutting assembly, and sealing assembly; the glue supply assembly facilitates the supply of tape to seal the corners of the carton; the glue cutting assembly facilitates the cutting of the tape; the pressure strip facilitates the tight adhesion of the tape on the top of the carton to the top of the carton; and the tilting head facilitates the guidance of the carton and tape. The bottom of the pressure bar, with its guide strip, facilitates the downward folding of the tape on the top side of the carton, allowing the tape to adhere to the side and seal the corners of the carton. The fixing frame provides a mounting base for the bonding roller, while the second guide rod limits and guides the movement of the bonding roller. The push spring provides thrust to the bonding roller, ensuring a tight fit between the roller and the top side of the carton, thus sealing the corners. This invention efficiently seals the corners of cartons, improving efficiency and possessing high practical value. Attached Figure Description

[0027] Figure 1 This is a three-dimensional structural diagram of a corner sealing device for paper product packaging according to the present invention;

[0028] Figure 2 This is an exploded view of the edge-sealing component of this utility model;

[0029] Figure 3 This is an exploded view of the glue-cutting assembly of this utility model;

[0030] Figure 4 An exploded view of the adhesive supply assembly of this utility model;

[0031] Figure 5 This is a three-dimensional structural diagram of the glue-cutting assembly of this utility model.

[0032] In the diagram: 1. Base assembly; 11. Worktable; 12. Moving roller; 13. Limiting strip; 14. Side plate; 15. Mounting frame; 16. First guide rail; 17. Second guide rail; 18. First telescopic rod; 19. Stop block; 2. Adhesive supply assembly; 21. Mounting seat; 22. Damping roller; 23. Screw hole; 24. Fixing block; 25. Screw rod; 26. Edge sealing tape; 3. Adhesive cutting assembly; 31. Second telescopic rod; 32. Moving seat; 33. Cutting knife; 34. Fixed roller; 35. Third telescopic rod; 36. Lifting frame; 37. Rotating seat; 38. Pressure roller; 39. First guide rod; 310. Pressure spring; 4. Edge sealing assembly; 41. Pressure strip; 42. Lifting head; 43. Guide strip; 44. Fixing frame; 45. Second guide hole; 46. Second guide rod; 47. Shaft seat; 48. Fitting roller; 49. Push spring. Detailed Implementation

[0033] 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.

[0034] Please see Figures 1-5This utility model provides a technical solution: a corner sealing device for paper product packaging, including a base assembly 1, the base assembly 1 including a worktable 11, a plurality of movable rollers 12 rotatably connected to the top center of the worktable 11, the movable rollers 12 facilitate the sliding of the carton on the top of the worktable 11, a limit strip 13 is fixedly installed on one side of the top of the worktable 11, the limit strip 13 facilitates the limiting and guiding of the movement of the carton, and facilitates the sealing assembly 4 to seal the corners of the carton, the limit strip 13 is fixedly installed on the top of the limit strip 13, and a side plate 14 is fixedly installed on the top of the side plate 14. The side panel 14 is designed to provide a mounting base for the glue supply assembly 2, the glue cutting assembly 3, and the edge sealing assembly 4. The edge sealing assembly 4 is located at the top center of the side panel 14, and the glue supply assembly 2 is located at one end of the top of the side panel 14. The glue supply assembly 2 facilitates the supply of tape to seal the corners of the carton. The glue cutting assembly 3 is located between the edge sealing assembly 4 and the glue supply assembly 2, facilitating the cutting of the tape. The edge sealing assembly 4 includes a pressure strip 41, which ensures that the tape on the top of the carton is tightly adhered to the top of the carton. The pressure strip 41 is fixedly installed on the side panel 14. 4. On one side of the top center of the pressure strip 41, a raised head 42 is provided at the end facing the glue supply assembly 2. The raised head 42 facilitates the guidance of the carton and tape into the bottom of the pressure strip 41. A guide strip 43 is fixedly installed on the side of the pressure strip 41 facing the side plate 14. The guide strip 43 facilitates the downward folding of the tape on the top side of the carton, making it easier for the tape to adhere to the side and seal the corners of the carton. A fixing bracket 44 is provided at one end of the guide strip 43. The fixing bracket 44 has second guide holes 45 at both ends. The fixing bracket 44 facilitates the installation of the fitting roller 48. The base is installed with a second guide rod 46 slidably connected inside the second guide hole 45. A bearing seat 47 is fixedly installed at one end of the second guide rod 46. A conforming roller 48 is rotatably connected between the two bearing seats 47. The second guide rod 46 is used to limit and guide the movement trajectory of the conforming roller 48. A push spring 49 is provided between the bearing seat 47 and the fixed frame 44. The push spring 49 is used to provide thrust to the conforming roller 48, so that the conforming roller 48 fits tightly against the top side of the carton, which facilitates the tight adhesion of the tape to the carton and achieves edge sealing of the carton.

[0035] The adhesive supply assembly 2 includes a mounting base 21. A damping roller 22 is rotatably connected to one side of the mounting base 21. An edge sealing tape 26 is sleeved on the outside of the damping roller 22. The damping roller 22 facilitates the fixed installation of the edge sealing tape 26 on the top of the side plate 14, making it convenient to supply tape to the device. The damping roller 22 can also provide damping to limit the rotation speed of the edge sealing tape 26, so that the edge sealing tape 26 has tension and can be tightened.

[0036] The damping roller 22 has a screw hole 23 in the middle of one end. A screw rod 25 is threaded inside the screw hole 23. A fixing block 24 is fixedly installed at one end of the screw rod 25. The screw rod 25 facilitates the easy disassembly and installation of the fixing block 24, thereby making it convenient to disassemble and replace the edge sealing tape 26.

[0037] The side plate 14 has a mounting bracket 15 fixedly installed at the top, and a first guide rail 16 is provided on one side of the top of the side plate 14. The mounting bracket 15 and the first guide rail 16 facilitate the installation of the glue cutting assembly 3.

[0038] The adhesive cutting assembly 3 includes a second telescopic rod 31, which is fixedly installed inside the mounting frame 15. A movable seat 32 is fixedly installed at the output end of the second telescopic rod 31. The movable seat 32 is slidably connected to the first guide rail 16. The second telescopic rod 31 facilitates the adhesion of the tape end to the top of the carton when the first end of the carton moves between the fixed roller 34 and the adhesive supply assembly 2. The operation of the second telescopic rod 31 drives the cutting blade 33 and the fixed roller 34 to retract into the first guide rail 16, avoiding obstruction to the movement of the carton. The adhesion between the tape and the fixed roller 34 is less than that between the tape and the surface of the carton, allowing the tape to detach from the fixed roller 34 during the retraction process.

[0039] The movable seat 32 has a cutting blade 33 fixedly installed on one side, and several fixed rollers 34 are rotatably connected to the other side. The rotation axis of the fixed rollers 34 is perpendicular to the extension direction of the second telescopic rod 31. The cutting blade 33 and the fixed rollers 34 are arranged so that when the tail end of the carton moves to the bottom of the pressure roller 38, the movable seat 32 extends the cutting blade 33 and the fixed rollers 34, the carton moves forward further, the pressure roller 38 presses down on the tape, so that the cutting blade 33 cuts the tape and sticks the end of the tape to the fixed roller 34, so that the sealing tape 26 can seal the corners of the next carton.

[0040] The rubber cutting assembly 3 also includes a third telescopic rod 35, and a lifting frame 36 is fixedly installed at the output end of the third telescopic rod 35. The setting of the third telescopic rod 35 facilitates the up and down movement of the lifting frame 36.

[0041] The lifting frame 36 has a pressure spring 310 fixedly installed at the bottom center, and a rotating seat 37 fixedly installed at the other end of the pressure spring 310. The rotating seat 37 is rotatably connected to the pressure roller 38. The pressure spring 310 provides elastic force to push the pressure roller 38 downward, so that the pressure roller 38 tightly adheres the tape to the top of the carton. It can also be used with the tape cutting component 3 to cut the tape after the corner sealing is completed.

[0042] The rotating seat 37 has a first guide rod 39 fixedly installed at both ends of its top, and the lifting frame 36 has a first guide hole at both ends. The first guide rod 39 is slidably connected to the first guide hole. The first guide rod 39 facilitates the guidance and limitation of the movement of the rotating seat 37.

[0043] The limiting strip 13 has a second guide rail 17 in the middle and on one side. A first telescopic rod 18 is fixedly installed in the middle of one end of the second guide rail 17. A stop block 19 is fixedly installed at the output end of the first telescopic rod 18. The stop block 19 is slidably connected to the second guide rail 17. An ultrasonic sensor is fixedly installed on one side of the side plate 14. The setting of the two first telescopic rods 18 and the ultrasonic sensor facilitates the ultrasonic sensor to monitor the position of the carton. When the first telescopic rod 18 at the bottom of the glue cutting assembly 3 works, it extends the stop block 19 to limit the carton and make the tape adhere to the beginning of the carton. At the same time, the second telescopic rod 31 drives the moving seat 32 to retract. After the retraction is completed, the first telescopic rod 18 is retracted. The other first telescopic rod 18 extends the stop block 19 to limit the movement of the carton. When the end of the carton moves to the bottom of the pressure roller 38, it stops and waits for the second telescopic rod 31 to drive the moving seat 32 to extend the cutting knife 33 and the fixed roller 34 to facilitate the cutting of the sealing tape 26.

[0044] Specifically, the working principle of this edge sealing device for paper product packaging is as follows: During use, the moving roller 12 facilitates the sliding of the carton on the top of the worktable 11. The limiting strip 13 facilitates the limiting and guiding of the carton's movement, allowing the edge sealing assembly 4 to seal the carton's edges. The side plate 14 provides a mounting base for the glue supply assembly 2, glue cutting assembly 3, and edge sealing assembly 4. The damping roller 22 facilitates the fixed installation of the edge sealing tape 26 on the top of the side plate 14, providing tape for the device's operation. The damping roller 22 also provides damping, limiting the rotation speed of the edge sealing tape 26 and ensuring its tension. The screw rod 25 facilitates the easy disassembly and installation of the fixing block. 24. This facilitates the disassembly and replacement of the sealing tape 26. The pressure strip 41 facilitates the tight adhesion of the tape on the top of the carton to the top of the carton. The tilting head 42 facilitates the guidance of the carton and tape into the bottom of the pressure strip 41. The guide strip 43 facilitates the downward folding of the tape on the top side of the carton, facilitating the adhesion of the tape to the side and achieving edge sealing of the carton. The fixing frame 44 facilitates the provision of an installation base for the flattening roller 48. The second guide rod 46 facilitates the limitation and guidance of the movement trajectory of the flattening roller 48. The push spring 49 facilitates the provision of thrust to the flattening roller 48, ensuring that the flattening roller 48 tightly adheres to the top side of the carton, facilitating the tight adhesion of the tape to the carton and achieving... The edges of the carton are sealed. Two first telescopic rods 18 and an ultrasonic sensor are used to monitor the carton's position. The first telescopic rod 18, located at the bottom of the glue-cutting assembly 3, extends the stop block 19 to limit the carton's movement, ensuring the tape adheres to the front end. Simultaneously, the second telescopic rod 31 retracts the moving seat 32. After retraction, the first telescopic rod 18 retracts, and the other first telescopic rod 18 extends the stop block 19 to limit the carton's movement, pausing when the rear end of the carton reaches the bottom of the pressure roller 38. The second telescopic rod 31 then drives the moving seat 32 to extend the cutting blade 33 and the fixed roller 34, facilitating the cutting of the sealing tape 26. The second telescopic rod 31 facilitates the cutting of the sealing tape at the front end of the carton. When the tape moves between the fixed roller 34 and the glue supply assembly 2, the end of the tape adheres to the top of the carton. The second telescopic rod 31 then retracts the cutter 33 and the fixed roller 34 into the first guide rail 16, avoiding obstruction to the movement of the carton. The adhesion between the tape and the fixed roller 34 is less than that between the tape and the surface of the carton, allowing the tape to detach from the fixed roller 34 during the retraction process. The arrangement of the cutter 33 and the fixed roller 34 facilitates the extension of the cutter 33 and the fixed roller 34 by the moving seat 32 when the tail end of the carton moves to the bottom of the pressure roller 38. The carton moves further forward, and the pressure roller 38 presses down on the tape, causing the cutter 33 to cut the tape and adhere the end of the tape to the fixed roller 34, making it convenient for the sealing tape 26 to seal the corners of the next carton.The third telescopic rod 35 facilitates the up-and-down movement of the lifting frame 36, and the pressure spring 310 provides elasticity to push the pressure roller 38 downwards, ensuring the tape adheres tightly to the top of the carton. Furthermore, the pressure roller 38 can be used with the tape cutting assembly 3 to cut the tape after the corners are sealed.

[0045] The above description is merely a preferred embodiment of this utility model and is not intended to limit the utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A corner sealing device for paper product packaging, characterized in that, The system includes a base assembly (1), which includes a worktable (11). Several movable rollers (12) are rotatably connected to the top center of the worktable (11). A limit strip (13) is fixedly installed on one side of the top of the worktable (11). A side plate (14) is fixedly installed on the top of the limit strip (13). An edge sealing assembly (4) is provided at the top center of the side plate (14), and a glue supply assembly (2) is provided at one end of the top of the side plate (14). A glue cutting assembly (3) is provided between the edge sealing assembly (4) and the glue supply assembly (2). The edge sealing assembly (4) includes a pressure strip (41), which is fixedly installed on the side plate (14). On one side of the top center, the pressure strip (41) has a raised head (42) facing the glue supply assembly (2). A guide strip (43) is fixedly installed on the side of the pressure strip (41) facing the side plate (14). A fixing frame (44) is provided at one end of the guide strip (43). A second guide hole (45) is opened at both ends of the fixing frame (44). A second guide rod (46) is slidably connected inside the second guide hole (45). A bearing seat (47) is fixedly installed at one end of the second guide rod (46). A conforming roller (48) is rotatably connected between the two bearing seats (47). A push spring (49) is provided between the bearing seat (47) and the fixing frame (44).

2. The edge sealing device for paper product packaging according to claim 1, characterized in that, The adhesive supply assembly (2) includes a mounting base (21), a damping roller (22) is rotatably connected to one side of the mounting base (21), and an edge sealing tape (26) is sleeved on the outside of the damping roller (22).

3. The edge sealing device for paper product packaging according to claim 2, characterized in that, The damping roller (22) has a screw hole (23) in the middle of one end, and a screw rod (25) is threaded inside the screw hole (23). A fixing block (24) is fixedly installed at one end of the screw rod (25).

4. The edge sealing device for paper product packaging according to claim 1, characterized in that, The top of the side plate (14) is fixedly installed with a mounting bracket (15), and a first guide rail (16) is provided on one side of the top of the side plate (14).

5. The edge sealing device for paper product packaging according to claim 1, characterized in that, The cutting assembly (3) includes a second telescopic rod (31), which is fixedly installed inside the mounting frame (15). A movable seat (32) is fixedly installed at the output end of the second telescopic rod (31), and the movable seat (32) is slidably connected to the first guide rail (16).

6. The edge sealing device for paper product packaging according to claim 5, characterized in that, A cutting blade (33) is fixedly installed on one side of the movable seat (32), and a number of fixed rollers (34) are rotatably connected to the other side of the movable seat (32). The rotation axis of the fixed rollers (34) is perpendicular to the extension and retraction direction of the second telescopic rod (31).

7. The edge sealing device for paper product packaging according to claim 5, characterized in that, The cutting assembly (3) also includes a third telescopic rod (35), and a lifting frame (36) is fixedly installed at the output end of the third telescopic rod (35).

8. A corner sealing device for paper product packaging according to claim 7, characterized in that, A pressure spring (310) is fixedly installed at the middle of the bottom end of the lifting frame (36), and a rotating seat (37) is fixedly installed at the other end of the pressure spring (310). A pressure roller (38) is rotatably connected inside the rotating seat (37).

9. A corner sealing device for paper product packaging according to claim 8, characterized in that, The rotating seat (37) has a first guide rod (39) fixedly installed at both ends of its top. The lifting frame (36) has a first guide hole at both ends. The first guide rod (39) is slidably connected to the first guide hole.

10. A corner sealing device for paper product packaging according to claim 1, characterized in that, The limiting strip (13) is provided with a second guide rail (17) in the middle and on one side. A first telescopic rod (18) is fixedly installed in the middle of one end of the second guide rail (17). A stop block (19) is fixedly installed at the output end of the first telescopic rod (18). The stop block (19) is slidably connected to the second guide rail (17). An ultrasonic sensor is fixedly installed on one side of the side plate (14).

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