Three-dimensional packaging machine for glue spraying and bonding

Abstract

The utility model relates to a three-dimensional packaging machine, in particular to a glue spraying bonding three-dimensional packaging machine which comprises a feeding mechanism, a feeding path is formed on the feeding mechanism, a paper wrapping station, a middle sealing station and a side face sealing station are sequentially arranged on the feeding path, the feeding mechanism comprises a first pushing head, a first chain drives the first pushing head to move longitudinally, and a second chain drives the second pushing head to move longitudinally. The first push head is connected with the middle sealing station and the side face sealing station, the side face sealing station is provided with a feeding platform, a lug guide plate, a first lug folding plate and a second lug folding plate, the lug guide plate is provided with a lug guide edge line and a first limiting edge line, and the first lug folding plate is provided with a first lug folding edge line and a second limiting edge line. The first lug folding plate is provided with a first lug folding edge line, the first lug folding edge line and the first limiting edge line form a first lug folding channel, the middle of the first lug folding plate is provided with a through hole allowing the side face glue spraying head to be exposed, the second lug folding plate is provided with a second lug folding edge line, the second lug folding edge line and the second limiting edge line form a second lug folding channel, and side face sealing of paper packaging is completed in the feeding process.

Description

Technical Field

[0001] This utility model relates to a three-dimensional packaging machine, and more particularly to a three-dimensional packaging machine for adhesive spraying. Background Technology

[0002] The existing three-dimensional packaging machine for soap uses coated paper to wrap the soap and heat-seals the middle and sides. It is proposed to use ordinary paper to wrap the soap and seal the middle and sides by adhesive, thus saving costs. Utility Model Content

[0003] In view of the technical problems existing in the background art, the present invention aims to provide a three-dimensional packaging machine for adhesive spraying, which completes the sealing of the middle and sides of three-dimensional paper packaging through adhesive bonding.

[0004] To solve the above-mentioned technical problems, this utility model adopts the following technical solution: This three-dimensional packaging machine for spray adhesive bonding includes a feeding mechanism. The feeding mechanism forms a feeding path, wherein a wrapping station, a middle sealing station, and a side sealing station are sequentially arranged on the feeding path. The feeding mechanism includes a first pusher, which is spaced apart on a first chain. The first chain drives the first pusher to move longitudinally. The first pusher connects the middle sealing station and the side sealing station. The side sealing station is equipped with a feeding platform, a guide plate, a first folding plate, and a second folding plate. The feeding platform has a first longitudinal opening for the first pusher to pass through and move longitudinally. The guide plate has a guide edge line and a first limiting edge line. The guide edge line is along the feeding path... Extending outwards, the first limiting edge line is inclined relative to the guide ear edge line. The first folding ear plate has a first folding ear edge line and a second limiting edge line. Both the first folding ear edge line and the second limiting edge line are inclined relative to the guide ear edge line. The first folding ear edge line and the first limiting edge line form a first folding ear channel. The first folding ear plate has a through hole in the middle for the side spray nozzle to be exposed. The second folding ear plate has a second folding ear edge line. The second folding ear edge line is inclined relative to the guide ear edge line. The second folding ear edge line and the second limiting edge line form a second folding ear channel. The first folding ear edge line and the second folding ear line are V-shaped. The ear of the outer packaging paper enters the second folding ear channel along the guide ear edge line. The first folding ear plate is located between the guide ear plate and the second folding ear plate.

[0005] In this scheme, the first pusher pushes the packaged soap to move longitudinally, one ear on the side of the paper packaging enters the first folding ear channel, gradually bends along the edge of the first folding ear until it exits the first folding ear channel, and the side spray nozzle sprays glue on the part of the ear to be glued after it is bent into place. The other ear on the side enters the second folding ear channel along the guide ear edge and gradually bends to fit with the ear that is bent into place.

[0006] Preferably, the through hole is connected to the second folded ear channel.

[0007] In this design, the glue applied to the bent ear section will not come into contact with the first folding ear plate.

[0008] Preferably, the first folding plate is approximately an isosceles trapezoid.

[0009] In this solution, there is a time difference between the bending of the two ears on the side of the paper packaging, ensuring that the spraying is in place and that the ears to be bent will not affect the spraying.

[0010] Preferably, the guide plate is trapezoidal, and there is a gap between the lower end of the guide plate and the feeding platform for the lower ear to pass through.

[0011] In this design, the lower end of the ear guide plate keeps the lower ear in a bendable position.

[0012] Preferably, a pressure strip is provided between the first folding ear plates on both sides.

[0013] In this design, the pressure strip keeps the soap wrapped in packaging paper stable during the side sealing process, preventing it from shifting and affecting the folding effect.

[0014] Preferably, the side bonding station is also equipped with a laterally movable pressing plate.

[0015] In this design, the laterally moving pressing plate presses the upper and lower ears together, ensuring a good bonding effect.

[0016] Preferably, the feeding mechanism further includes a turret, which connects the paper wrapping station and the intermediate sealing station. The turret includes a main body and a clamping assembly. The main body is rotatably configured and includes a first mounting frame and a second mounting frame. A pushing gap is formed between the first mounting frame and the second mounting frame for the first pusher to pass through. The clamping assembly is distributed circumferentially along the main body and includes a left clamp and a right clamp. Both the left clamp and the right clamp include a top plate, a bottom plate, and a side plate. Gaps for accommodating folding ears are formed between the top plate and the upper end of the side plate, and between the bottom plate and the lower end of the side plate.

[0017] In this design, the top, bottom, and side panels retain the folded ear shape of the packaging paper.

[0018] Preferably, the intermediate sealing station is equipped with an intermediate glue spraying assembly and an intermediate sealing assembly. The intermediate glue spraying assembly and the intermediate sealing assembly are arranged along the circumference of the turret. The intermediate glue spraying assembly includes an intermediate glue spraying head and a backing plate. The intermediate sealing assembly includes a pressure plate and a side baffle. The pressure plate is raised and lowered above the first longitudinal opening. The side baffles are located on both sides of the first longitudinal opening. Gaps for accommodating ears are formed between the upper end of the pressure plate and the side baffle, and between the feeding platform and the lower end of the side baffle.

[0019] In this design, the backing plate is used to abut the long side, and the middle spray nozzle sprays glue onto the bonding area of ​​the long side. The turret rotates, causing the long side to bend under the action of the backing plate. The first pusher pushes the soap towards the middle sealing component, and the long side bends again to overlap with the short side in the vertical direction. Under the action of the pressure plate and the side baffle, the other corner of the ear is folded out. The pressure plate descends to press the long side and the short side together.

[0020] Preferably, the feeding mechanism further includes a second pusher head, which is spaced apart on a second chain. The second chain drives the second pusher head to move longitudinally. The paper wrapping station is equipped with a paper wrapping platform, a paper feeding assembly, and a folding ear assembly. The paper wrapping platform has a second longitudinal opening for the second pusher head to pass through and move longitudinally. The paper feeding assembly includes a traction roller group and a cutting component. The traction roller group and the cutting component are arranged sequentially along the vertical direction. The traction roller group pulls to form a paper strip. The second longitudinal opening extends to both sides with transverse openings for the paper strip to pass through. The folding ear assembly is disposed at the transverse opening. The folding ear assembly includes an upper insert plate and a side insert plate. The upper insert plate is located above the second longitudinal opening, and the side insert plates are located on both sides of the second longitudinal opening. Gap gaps are formed between the upper insert plate and the upper end of the side insert plate, and between the paper wrapping platform and the lower end of the side insert plate, for accommodating the folding ear.

[0021] In this design, the soap is wrapped at the wrapping station by the push of the second pusher. When it passes the folding ear assembly, the upper insert plate will fold the top of the wrapping paper forward, and the side insert plate will fold the two sides of the wrapping paper forward, forming a corner of the ear for sealing.

[0022] The beneficial effects of this utility model are as follows: the first and second folding ear channels allow the upper and lower ears on both sides of the paper packaging to bend into place respectively; a side glue spraying head is designed to spray glue during the interval between the bending of the upper and lower ears, completing the side sealing of the paper packaging during the feeding process, resulting in high efficiency. Therefore, this utility model has substantial features and progress compared with the prior art. Attached Figure Description

[0023] The following description, in conjunction with the accompanying drawings, details the embodiments and working principles of this utility model.

[0024] Figure 1This is a schematic diagram of the structure of this utility model.

[0025] Figure 2 for Figure 1 A magnified view of A in the middle.

[0026] Figure 3 This is a three-dimensional structural diagram of the first folded ear channel and the second folded ear channel in this utility model.

[0027] Figure 4 This is a three-dimensional structural diagram of the pressure plate of this utility model.

[0028] Figure 5 This is a three-dimensional structural diagram of the adhesive spraying assembly in this utility model.

[0029] Figure 6 This is a three-dimensional structural diagram of the transfer tower of this utility model.

[0030] Figure 7 This is a three-dimensional structural diagram of the paper-packing platform in this utility model.

[0031] Figure 8 This is a schematic diagram of the upper paper assembly in this utility model.

[0032] Figure 9 This is a three-dimensional structural diagram of the second pusher in this utility model.

[0033] Figure 10 This is a side view of the ears on the outer packaging paper of this utility model.

[0034] In the diagram: 1. Paper wrapping platform; 2. Second pusher head; 3. First longitudinal opening; 5. Guide ear edge line; 6. First folding ear edge line; 7. Second folding ear edge line; 9. Paper feeding assembly; 10. Traction roller group; 11. Cutting component; 12. Transverse opening; 13. Turret; 20. Support plate; 21. Pusher head passage; 22. Top block; 23. Main body; 24. Clamp assembly; 25. Left clamp; 26. Right clamp; 27. Top plate; 28. Bottom plate; 29. ​​Side plate; 30. Middle 32. Glue spraying assembly; 33. Central glue spraying head; 34. Backing plate; 35. First mounting bracket; 36. Second mounting bracket; 37. Feeding platform; 38. First longitudinal opening; 39. Central sealing assembly; 40. Pressure plate; 41. Side baffle; 42. Guide ear plate; 44. First folding ear plate; 45. First folding ear channel; 46. Through hole; 47. Second folding ear plate; 48. Second folding ear channel; 49. Pressing plate; 50. Side insert plate; 51. Drive surface; 52. Side glue spraying head. Detailed Implementation

[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the implementation of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0036] In the description of this application, it should be understood that the terms "upper" and "lower" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0037] In the description of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated.

[0038] See appendix Figure 1-4 10. In an embodiment of this invention, a three-dimensional packaging machine for spray adhesive bonding includes a feeding mechanism. The feeding mechanism forms a feeding path, wherein a paper wrapping station, a middle sealing station, and a side sealing station are sequentially arranged on the feeding path. The feeding mechanism includes a first pusher, which is spaced on a first chain. The first chain drives the first pusher to move longitudinally, and the first pusher connects the middle sealing station and the side sealing station.

[0039] The side sealing station is equipped with a feeding platform 36, a guide ear plate 42, a first folding ear plate 44, and a second folding ear plate 47. The feeding platform 36 has a first longitudinal opening 373 for the first push head to pass through and move longitudinally. The guide ear plate 42 has a guide ear edge line 5 and a first limiting edge line. The guide ear plate 42 is trapezoidal. There is a gap between the lower end of the guide ear plate 42 and the feeding platform 36 for the lower ear to pass through. The guide ear edge line 5 extends along the feeding direction. The first limiting edge line is inclined relative to the guide ear edge line 5.

[0040] The first folding plate 44 has a first folding edge line 6 and a second limiting edge line. The first folding plate 44 is approximately an isosceles trapezoid. The first folding edge line 6 and the second limiting edge line are both inclined relative to the guide edge line 5. The first folding edge line 6 and the first limiting edge line form a first folding channel 45. The first folding plate 44 has a through hole 46 in the middle for the side spray nozzle 52 to be exposed.

[0041] The second folding ear plate 47 has a second folding ear edge line 7, which is inclined relative to the guide ear edge line 5. The second folding ear edge line 7 and the second limiting edge line form a second folding ear channel 48. The first folding ear edge line 6 and the second folding ear edge line 7 are V-shaped. The through hole 46 communicates with the second folding ear channel 48. The ear of the outer packaging paper enters the second folding ear channel 48 along the guide ear edge line 5. The first folding ear plate 44 is located between the guide ear plate 42 and the second folding ear plate 47. A pressing strip is provided between the first folding ear plates 44 on both sides. The side bonding station is also equipped with a laterally movable pressing plate 49.

[0042] In this embodiment, the upper ear on the side of the packaging paper is defined as the upper ear, and the lower ear as the lower ear. The upper ear can be folded first, or the lower ear can be folded first, by adjusting the tilt angle of the corresponding ear edge. The first pusher pushes the soap wrapped in packaging paper to move longitudinally. One ear on the side of the paper packaging enters the first ear folding channel 45 and gradually bends along the first ear folding edge 6 until it exits the first ear folding channel 45. The side glue spray head 52 sprays glue on the part of the ear to be glued after it is bent into place. The other ear on the side enters the second ear folding channel along the guide ear edge 5. The channel 48 gradually bends along the second folding ear edge 7 to fit the bent ear. The pressing plate 49 moves laterally to seal the upper and lower ears. The through hole 46 is connected to the second folding ear channel 48, so that the glue will not come into contact with the middle folding cardboard. The glue spray head is a mature technology. The guide ear edge 5 keeps the ear to be bent in a bent state to avoid affecting the bending of the other ear, and can guide the ear into the second folding channel. The first folding ear plate 44 is trapezoidal, and its corresponding edge line must also cooperate with the guide ear edge line 5 to guide the corresponding ear.

[0043] See appendix Figure 5-6The feeding mechanism further includes a turret 13, which connects the paper wrapping station and the intermediate sealing station. The turret 13 includes a main body 23 and a clamping assembly 24. The main body 23 is rotatably mounted and includes a first mounting frame 34 and a second mounting frame 35. A pushing gap is formed between the first mounting frame 34 and the second mounting frame 35 for the first pusher head to pass through. The clamping assembly 24 is distributed circumferentially along the main body 23 and includes a left clamp 25 and a right clamp 26. Both the left clamp 25 and the right clamp 26 include a top plate 27, a bottom plate 28, and a side plate 29. The top plate 27 and the upper end of the side plate 29 are connected, and the bottom plate 28 and the side plate 29 are connected. The lower ends of the side plates 29 are all provided with gaps for accommodating the folded ears. The intermediate sealing station is equipped with an intermediate glue spraying assembly 30 and an intermediate sealing assembly 38. The intermediate glue spraying assembly 30 and the intermediate sealing assembly 38 are arranged around the circumference of the turret 13. The intermediate glue spraying assembly 30 includes an intermediate glue spraying head 32 and a backing plate 33. The intermediate sealing assembly 38 includes a pressure plate 39 and a side baffle 40. The pressure plate 39 is raised and lowered above the first longitudinal opening 373. The side baffle 40 is located on both sides of the first longitudinal opening 373. Gaps for accommodating the ears are formed between the upper ends of the pressure plate 39 and the side baffle 40, and between the feeding platform 36 and the lower ends of the side baffle 40.

[0044] In this embodiment, the soap is defined as having six sides: A, B, C, D, E, and F, where E and F are the sides. The feeding direction is from front to back (longitudinal). The clamp assembly 24 receives the soap pushed by the second pusher 2. The gap of the clamp assembly 24 maintains the folded state of the ear. The soap is conveyed longitudinally on both the feeding platform 36 and the wrapping platform 1. Therefore, the soap rotates 180 degrees under the drive of the turret 13 to complete the flipping. At the glue spraying assembly, the long side is attached to the backing plate 33, and the long side is exposed to be glued. After the middle glue spraying head 32 moves laterally into position, it sprays glue on the long side. The turret 13 continues to flip, and the lower end of the backing plate 33 bends the long side to cover surface C and form a crease line. Soap A With the short side exposed and the D side facing backward, the first pusher pushes the soap from the clamp assembly 24 into the feeding platform 36 through the pushing gap. The long side is bent and covers the A side under the action of the front end of the pressure plate 39, forming a crease line. The side baffle 40 will cause the two sides of the D bread paper to bend forward and form a crease line, forming another corner of the ear for sealing on the side. The pressure plate 39 presses down to seal the long side and the short side. The middle glue spray head 32 can also adopt other movement trajectories, as long as it can avoid the long side. The design allows for controllable heating of the pressure plate 39 and the pressing plate 49 to act as a heat sealing plate, which can complete the heat sealing and is compatible with the packaging of coated paper. Alternatively, the pressure plate 39 and the pressing plate 49 can be replaced with heat sealing plates.

[0045] See appendix Figure 7-9The feeding mechanism further includes a second pusher 2, which is spaced apart on a second chain. The second chain drives the second pusher 2 to move longitudinally. The paper wrapping station is equipped with a paper wrapping platform 1, a paper feeding assembly 9, and a folding ear assembly. The paper wrapping platform 1 has a second longitudinal opening for the second pusher 2 to pass through and move longitudinally. The paper feeding assembly 9 includes a traction roller group 10 and a cutting component 11. The traction roller group 10 and the cutting component 11 are arranged vertically in sequence. The traction roller group 10 pulls to form a paper strip. The second longitudinal opening extends to both sides with transverse openings 12 for the paper strip to pass through. The folding ear assembly is disposed at the transverse opening 12. The folding ear assembly includes an upper insert plate and a side insert plate 50. The upper insert plate is located above the second longitudinal opening, and the side insert plates 50 are located on both sides of the second longitudinal opening. Gap for folding ear accommodation is formed between the upper insert plate and the upper end of the side insert plate 50, and between the paper wrapping platform 1 and the lower end of the side insert plate 50.

[0046] In this embodiment, the second chain drives the second pusher 2 to move longitudinally, pushing the soap through the wrapping station and finally leaving the wrapping platform 1 to enter the turret 13. A hopper can be set up on the wrapping platform 1 to supply the soap, or a conveyor belt can be set up to connect with the soap production equipment to transport the soap to the wrapping platform 1, where it is pushed backward by the second pusher 2.

[0047] The first chain and the second chain are both wound around the sprocket, and the motor drives the sprocket to rotate; the notch cooperates with the paper wrapping platform 1 to limit the left and right displacement of the second pusher 2; a support plate 20 is provided below the second longitudinal opening; the second pusher 2 is provided with an arc-shaped part corresponding to the support plate 20 to reduce friction.

[0048] At the paper wrapping station, the B side of the soap is wrapped with paper tape and the end of the paper tape is pulled away from the transverse opening 12, while part of the A side presses down on the end of the paper tape to form a short side. The cutting component includes a cutter and a cutter holder installed on the cutter roller. The cutter and the cutter holder work together to cut the paper tape to form a long side. The traction roller group 10 is equipped with an unwinding component. The paper feeding component 9 is a mature technology.

[0049] The second longitudinal opening is narrower than the transverse opening 12 in the horizontal direction, so the contact area between the paper wrapping platform 1 and the soap is large, providing stable support.

[0050] When passing the folding ear assembly, the upper insert plate will fold the long side forward to cover the C surface and form a crease line, and the side insert plate 50 will bend the two sides of the B bread paper forward to form a crease line, forming a corner of the ear on the side for sealing. The side insert plate 50 can be extended to guide the pushing of the soap. At the wrapping station, the side insert plate 50 is disconnected or a notch is set.

[0051] Then, the second pusher 2 pushes the soap into the turret 13. The top block 22 is designed to drive the second pusher 2 to swing, so that the second pusher 2 can push the soap into place without squeezing the soap. The soap is accurately positioned during the rotation of the turret 13, and the middle glue spray position is accurate. The top block 22 drives the second pusher 2 to swing. Specifically, the second pusher 2 is provided with a driving surface 51, and the top block 22 is in line contact with the driving surface 51, causing the second pusher 2 to swing forward.

[0052] The above description represents the preferred embodiment of this utility model. It should be noted that the scope of protection of this utility model is not limited thereto. For those skilled in the art, various improvements, modifications, or equivalent substitutions can be made without departing from the equivalent inventive concept disclosed in this utility model, and these can also be considered as part of the scope of protection of this utility model.

Claims

1. A three-dimensional packaging machine for adhesive spraying, comprising a feeding mechanism having a feeding path, characterized in that: The feeding path is sequentially equipped with a paper wrapping station, a middle sealing station, and a side sealing station. The feeding mechanism includes a first pusher head, which is spaced apart on a first chain. The first chain drives the first pusher head to move longitudinally. The first pusher head connects the middle sealing station and the side sealing station. The side sealing station is equipped with... The feeding platform (36) is provided with a first longitudinal opening (37) (3) for the first pusher to pass through and move longitudinally; The guide plate (42) has a guide edge line (5) and a first limiting edge line, the guide edge line (5) extending along the feeding direction, and the first limiting edge line inclined relative to the guide edge line (5); The first folding plate (44) has a first folding edge line (6) and a second limiting edge line. The first folding edge line (6) and the second limiting edge line are both inclined relative to the guide edge line (5). The first folding edge line (6) and the first limiting edge line form a first folding channel (45). The first folding plate (44) has a through hole (46) in the middle for the side spray nozzle (52) to be exposed. The second folding plate (47) has a second folding edge line (7), which is inclined relative to the guide edge line (5). The second folding edge line (7) and the second limiting edge line form a second folding channel (48). The first folding edge line (6) and the second folding edge line (7) are V-shaped. The ear of the outer packaging paper enters the second folding channel (48) along the guide edge line (5). The first folding plate (44) is located between the guide plate (42) and the second folding plate (47).

2. The three-dimensional packaging machine for adhesive spraying as described in claim 1, characterized in that: The through hole (46) is connected to the second folded ear channel (48).

3. The three-dimensional packaging machine for adhesive spraying as described in claim 1, characterized in that: The first folding plate (44) is approximately an isosceles trapezoid.

4. The three-dimensional packaging machine for adhesive spraying as described in claim 1, characterized in that: The guide plate (42) is trapezoidal, and there is a gap between the lower end of the guide plate (42) and the feeding platform (36) for the lower ear to pass through.

5. A three-dimensional packaging machine for adhesive spraying as described in claim 1, characterized in that: A pressure strip is provided between the first folding ear plates (44) on both sides.

6. The three-dimensional packaging machine for adhesive spraying as described in claim 1, characterized in that: The side bonding station is also equipped with a laterally movable pressing plate (49).

7. A three-dimensional packaging machine for adhesive spraying as described in claim 1, characterized in that: The feeding mechanism further includes a turret (13), which connects the paper wrapping station and the intermediate sealing station. The turret (13) includes... The main body (23) is rotatably configured, and the main body (23) includes a first mounting bracket (34) and a second mounting bracket (35), and a pushing gap is formed between the first mounting bracket (34) and the second mounting bracket (35) for the first pusher to pass through; The clamp assembly (24) is distributed circumferentially along the main body (23). The clamp assembly (24) includes a left clamp (25) and a right clamp (26). Both the left clamp (25) and the right clamp (26) include a top plate (27), a bottom plate (28) and a side plate (29). A gap for accommodating the folding lug is formed between the upper end of the top plate (27) and the side plate (29) and between the lower end of the bottom plate (28) and the side plate (29).

8. A three-dimensional packaging machine for adhesive spraying as described in claim 7, characterized in that: The intermediate sealing station is equipped with an intermediate glue spraying assembly (30) and an intermediate sealing assembly (38). The intermediate glue spraying assembly (30) and the intermediate sealing assembly (38) are arranged along the circumference of the turret (13). The intermediate glue spraying assembly (30) includes an intermediate glue spraying head (32) and a backing plate (33). The intermediate sealing assembly (38) includes a pressure plate (39) and a side baffle (40). The pressure plate (39) is raised and lowered above the first longitudinal opening (37) (3). The side baffle (40) is located on both sides of the first longitudinal opening (37) (3). There are gaps for accommodating ears between the upper end of the pressure plate (39) and the side baffle (40) and between the feeding platform (36) and the lower end of the side baffle (40).

9. A three-dimensional packaging machine for adhesive spraying as described in claim 7, characterized in that: The feeding mechanism further includes a second pusher (2), which is spaced apart on a second chain. The second chain drives the second pusher (2) to move longitudinally. The paper wrapping station is equipped with... The paper-wrapping platform (1) has a second longitudinal opening for the second pusher (2) to pass through and move longitudinally; The paper feeding assembly (9) includes a traction roller group (10) and a cutting component (11). The traction roller group (10) and the cutting component (11) are arranged vertically in sequence. The traction roller group (10) pulls to form a paper strip. The second longitudinal opening extends to both sides with transverse openings (12) for the paper strip to pass through. The folding lug assembly is disposed at the transverse opening (12). The folding lug assembly includes an upper insert plate and a side insert plate (50). The upper insert plate is located above the second longitudinal opening, and the side insert plates (50) are located on both sides of the second longitudinal opening. A gap for accommodating the folding lug is formed between the upper insert plate and the upper end of the side insert plate (50) and between the paper wrapping platform (1) and the lower end of the side insert plate (50).

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