A paper packaging machine

Abstract

The application discloses a paper packaging machine and relates to the field of packaging machines, which comprises a main frame, a conveying belt for feeding paper is movably arranged on one side of the main frame, a retention table is arranged between the main frame and the conveying belt, a transverse push plate is movably arranged on the surface of the retention table, a height limiting plate is arranged on one side of the retention table in the main frame, a longitudinal push plate is movably arranged at the bottom of the height limiting plate, a film coating structure is arranged on one side of the height limiting plate in the main frame, a limiting edge baffle is arranged at the end of the film coating structure away from the height limiting plate in the main frame, the limiting edge baffle is in abutment with both sides of the packaging paper, an inclined folding plate is fixedly arranged in the middle of the limiting edge baffle, an outlet limiting plate is arranged at the end of the limiting edge baffle away from the height limiting plate, and a film feeding structure for conveying the packaging film is arranged on the top of the limiting edge baffle in the main frame. The paper is fixed and limited, deviation of the paper during movement is avoided, the packaging film is assisted in being tensioned and aligned with the paper, and neat packaging is formed.

Description

Technical Field

[0001] This invention relates to the field of packaging machines, and more particularly to a paper packaging machine. Background Technology

[0002] With the advancement of the Industrial Revolution, packaging machinery technology has continuously improved. In the early 20th century, the introduction of automation technology greatly improved packaging efficiency and precision. In the 21st century, packaging machinery gradually introduced electronic control systems, improving cutting precision and ease of operation. Modern packaging machinery is also equipped with computer control systems and automation functions, making the production process more efficient and flexible. Paper, as an environmentally friendly and recyclable packaging material, has advantages such as low cost, light weight, and ease of processing and printing. With the increasing environmental awareness of consumers, the demand for paper packaging in the market is gradually increasing. For example, the invention patent with announcement number CN112374254A uses first support rods set at the four corners of the bottom of the working box. The working box has a built-in working cavity with an opening at the top. The bottom of the right side wall of the working cavity is set with a discharge port. The bottom of the working cavity is set with a guide groove that is connected to the external environment. The bottom of the working box is set with a positioning plate behind the guide groove. The overall packaging process is formed by the setting of transmission rods, fixing blocks, pins and guide blocks. However, when the device guides the paper, the vibration generated when the stacked paper moves can easily cause the paper to become loose and shift, resulting in the inability to package neatly. At the same time, the paper shift also causes uneven stress on the packaging film, which can easily lead to damage. Summary of the Invention

[0003] In order to improve the problem that existing paper packaging machines cause paper to become loose and shift during paper transportation, resulting in improper packaging and damage to the packaging film, this invention provides a paper packaging machine.

[0004] The paper packaging machine provided by this invention adopts the following technical solution: A paper packaging machine includes a main frame, a conveyor belt for feeding paper is movably disposed on one side of the main frame, a holding table is disposed between the main frame and the conveyor belt, a transverse push plate for tidying the paper is movably disposed on the surface of the holding table, a height limit plate for limiting the stacking height of the paper is disposed inside the main frame on one side of the holding table, a longitudinal push plate for moving the paper is movably disposed at the bottom of the height limit plate, and a film-coating structure for packaging the paper is disposed inside the main frame on one side of the height limit plate. A limiting baffle is provided at the end of the film-coated structure away from the height limit plate within the main frame. The limiting baffle abuts against both sides of the packaging paper. An inclined folding plate is slidably provided in the middle section of the limiting baffle. An exit limiting plate is provided at the end of the limiting baffle away from the height limit plate. A film feeding structure for conveying the packaging film is provided at the top of the limiting baffle within the main frame.

[0005] By adopting the above technical solution, the conveyor belt feeds the stacked paper into the surface of the holding table. The transverse pusher pushes the paper to the bottom of the height limiter. When the transverse pusher pushes to the end, it cooperates with the height limiter to form multi-faceted limiting of the paper, so that the paper is in a neat state. Then the paper is fed into the film-coating structure by the pushing structure. The film-feeding structure conveys the packaging film to coat the paper. When the paper is being packaged, the edge baffles are located on both sides of the paper to prevent the paper from shifting. At the same time, the inclined folding plate is located on one side of the front end of the paper to form a face-to-face contact state when the paper is packaged. After the paper is packaged, the inclined folding plate moves to cancel the limiting state of the paper, so that the paper is output to the outside, forming a neat limiting of the paper throughout the entire process and preventing the paper from shifting during movement.

[0006] Preferably, the main frame has a packaging forming cavity in the middle, and the main frame is provided with a conveying roller for transporting packaging paper at the bottom center of the packaging forming cavity. The film coating structure includes a film coating opening on the side of the retention table facing the longitudinal push plate, and the film coating opening connects the packaging forming cavity and the retention table.

[0007] By adopting the above technical solution, the opening of the packaging forming cavity provides the workpiece for paper packaging. The conveying roller is located at the bottom of the packaging forming cavity and rotates to drive the paper after packaging out. The laminating port connects the holding table and the packaging forming cavity, so that the paper is fed into the packaging forming cavity from the laminating port.

[0008] Preferably, a front folding knife is movably disposed on one side of the film-covering opening within the packaging forming cavity, and side folding knives are movably disposed on both sides adjacent to the front folding knife within the packaging forming cavity. A high-frequency electric heating device is fixedly disposed on one side of the packaging forming cavity, and the high-frequency electric heating device is connected to the front folding knife and the side folding knife for heat-melting the cut position of the packaging film.

[0009] By adopting the above technical solution, the front folding blade and the side folding blade move to push the packaging film to cover and fold the paper side surface. When the front folding blade and the side folding blade move to the bottom, the packaging film is heat-melted and cut by a high-frequency electric heating device, so that the cross-section of the packaging film is connected and sealed, thus completing the closed packaging of the paper.

[0010] Preferably, a waste trough for discharging excess packaging film is provided on one side adjacent to the bottom of the film-covering opening in the packaging forming cavity, and tensioning rollers for tightening the packaging film are rotatably arranged on both sides of the waste trough.

[0011] By adopting the above technical solution, tension rollers are set on both sides of the inner wall of the waste trough to receive the packaging film conveyed from the top. The rotation of the tension rollers ensures that the packaging film enters the waste trough accurately. At the same time, the two tension rollers rotate in opposite directions to apply a downward force to the packaging film, preventing the packaging film from becoming loose.

[0012] Preferably, the film feeding structure includes a mounting frame fixed in the packaging forming cavity on one side of the top of the conveying roller, and the film feeding roller is rotatably disposed on the inner wall of the mounting frame at the position aligned with the front folding knife.

[0013] By adopting the above technical solution, the mounting frame is fixed at the top of the packaging forming cavity, thereby providing a mounting fulcrum for the film feeding roller. The film feeding roller is aligned with the front folding knife, thereby conveying the packaging film to one side of the front folding knife, which facilitates the front folding knife to fold the packaging and cover the paper side surface.

[0014] Preferably, an auxiliary roller is rotatably arranged within the mounting frame on one side of the film feeding roller. The auxiliary roller is inclined to the film feeding roller to assist in tightening the packaging film. A film storage roller is rotatably arranged within the mounting frame on the side of the auxiliary roller away from the film feeding roller. The surface of the film storage roller is provided with the packaging film that is fed to the auxiliary roller.

[0015] By adopting the above technical solution, the film storage roller conveys the wound packaging film to the surface of the film feeding roller, and the auxiliary roller at the bottom squeezes the surface of the packaging film, causing the packaging film to be in a taut state, thereby facilitating the paper to move in and contact with the packaging film.

[0016] Preferably, a linkage gear set is fixed on one side of the outer surface of the mounting frame, and the gears in the linkage gear set are respectively fixed to the central shafts of the film storage roller, the auxiliary roller and the film delivery roller, thereby driving the film storage roller, the auxiliary roller and the film delivery roller to rotate synchronously.

[0017] By adopting the above technical solution, the linkage gear set drives the film storage roller, auxiliary roller and film feeding roller to rotate synchronously, so as to realize the conveying of packaging film, while avoiding tearing and damage to the packaging film due to different rotation speeds of individual roller surfaces.

[0018] Preferably, a servo motor is fixedly mounted on one side of the bottom of the main frame, a gear connecting seat is fixedly mounted on one side of the servo motor, a transmission chain is meshed at the output end of the servo motor for meshing and connecting with the gear connecting seat, and an inclined push plate is movably mounted on the side of the gear connecting seat away from the servo motor, and the top of the inclined push plate is rotatably connected to the longitudinal push plate.

[0019] By adopting the above technical solution, the servo motor drives the transmission chain, causing the rotating teeth in the gear connecting seat to rotate synchronously, thereby converting the rotational force into longitudinal thrust, which drives the inclined push plate to move longitudinally. As the inclined push plate moves longitudinally, it applies a thrust to the longitudinal push plate, causing the longitudinal push plate to push the paper that has moved to the bottom of the height limit plate into the packaging forming cavity to complete the packaging process.

[0020] Preferably, the height limit plate is rotatably equipped with a height adjustment knob on its top, which drives the height limit plate to move up and down. Multiple push plates are fixed inside the conveyor belt, and the multiple push plates abut against the paper to feed the paper into the device.

[0021] By adopting the above technical solution, the height limit plate is adjusted to be level with the height of the stacked paper by rotating the height adjustment knob, so that the bottom of the height limit plate abuts against the top of the paper. With the help of multiple push plates, the paper is always in contact with the paper, which prevents the paper from shifting during transportation and thus affecting the packaging process.

[0022] Preferably, the surface of the retention stage is provided with a moving groove, and a driving cylinder is provided at the bottom of the moving groove in the main frame. The bottom of the transverse push plate extends downward from the moving groove, and its extended end is fixedly connected to the output end of the driving cylinder.

[0023] By adopting the above technical solution, the opening of the moving slot provides auxiliary limiting for the movement of the transverse push plate. At the same time, the transverse push plate extends downward from the moving slot and connects to the drive cylinder, thereby forming a power transmission to push the paper transversely.

[0024] In summary, the present invention has at least one of the following beneficial technical effects: 1. The paper is fed in by a pusher plate that abuts against it. The paper is pushed forward by a horizontal pusher plate. When the paper is pushed to the end by the horizontal pusher plate, it works with the height limit plate to form a multi-directional abutment and limit on the paper, so that the paper remains neat during the feeding process. At the same time, when the paper moves into the packaging forming cavity, the front folding knife and the side folding knife are located on both sides of the packaging film and move along the side surface of the paper, so that the packaging film adheres to the outer surface of the paper to cover it, forming an automated packaging production. At the same time, it effectively avoids the problem of the paper being unable to be packaged due to deviation during the packaging process. 2. The film feeding roller, auxiliary roller, and film storage roller are driven to rotate synchronously by the linkage gear set to stably feed the packaging film to the paper. With the help of the tension roller and the limit of the auxiliary roller, the packaging film at the end of the conveying is provided with auxiliary pulling, so that the packaging film keeps a smooth state when it comes into contact with the paper, and avoids the problem of packaging film being damaged due to paper deviation. Attached Figure Description

[0025] Figure 1 This is a three-dimensional schematic diagram of the present invention; Figure 2 This is a front view of the present invention; Figure 3 This is a top view of the present invention; Figure 4 This is a schematic diagram of the gear connecting seat of the present invention; Figure 5 This is a schematic diagram of the film delivery structure of the present invention; Figure 6 This is an enlarged view of point A in the present invention; Figure 7 This is a schematic diagram showing the connection of the mounting frame, film feeding roller, auxiliary roller, film storage roller, and linkage gear set of the present invention.

[0026] Attached reference numerals: 1. Main frame; 2. Conveyor belt; 21. Push plate; 3. Retention table; 31. Moving groove; 32. Horizontal push plate; 4. Longitudinal push plate; 41. Inclined push plate; 42. Gear connecting seat; 43. Transmission chain; 44. Servo motor; 5. Packaging forming cavity; 51. Conveyor roller; 6. Height restriction board; 61. Height adjustment knob; 7. Coating structure; 71. Coating opening; 72. Front folding knife; 73. Side folding knife; 74. High-frequency electric heating device; 75. Tensioning roller; 8. Film feeding structure; 81. Mounting frame; 82. Film feeding roller; 83. Auxiliary roller; 84. Film storage roller; 85. Linkage gear set; 9. Inclined folding plate; 10. Edge limiting baffle; 11. Exit limiting plate. Detailed Implementation

[0027] The following is in conjunction with the appendix Figures 1-7 The present invention will be described in further detail below.

[0028] This invention discloses a paper packaging machine.

[0029] Reference Figure 1 , Figure 2 , Figure 3 A paper packaging machine includes a main frame 1, a packaging forming cavity 5 in the middle of the main frame 1, and multiple conveying rollers 51 rotatably arranged at the bottom center of the packaging forming cavity 5. The conveying rollers 51 drive the paper to move and package, and transport the packaged paper to the outside. Limiting baffles 10 are fixed on both sides of the conveying rollers 51 in the packaging forming cavity 5 to form auxiliary limiting for paper conveying. An outlet limiting plate 11 is fixed at one end of one side of the limiting baffle 10. The outlet limiting plate 11 is connected to an external transport and storage device to regulate the outward transport of the packaged paper. A holding platform 3 is fixed on one side of the front end of the main frame 1. A moving groove 31 is transversely opened in the middle of the holding platform 3. One end of the moving groove 31 extends transversely, and the extended end is located within the coverage area of ​​the packaging forming cavity 5. A drive cylinder is fixedly installed at the bottom alignment position of the retention stage 3 and the moving groove 31. The drive trajectory of the drive cylinder is consistent with the channel of the moving groove 31. A transverse push plate 32 is movably installed on the surface of the retention stage 3. The bottom of the transverse push plate 32 extends downward from the moving groove 31, and the extended end of the transverse push plate 32 is fixedly connected to the output end of the drive cylinder, so that the drive cylinder drives the transverse push plate 32 to move laterally along the moving groove 31. Under normal conditions, the transverse push plate 32 is located at the left end of the moving groove 31. A conveyor belt 2 is fixed at one end of the holding table 3 away from the main frame 1 (the conveyor belt 2 is aligned with the side surface of the transverse push plate 32). The conveyor belt 2 is connected to an external paper supply device. Multiple push plates 21 are fixed on the surface of the conveyor belt 2. The paper supply device places stacked paper on the surface of the conveyor belt 2 and abuts against one side surface of the push plate 21. As the conveyor belt 2 runs, it drives the push plate 21 to move, feeding the paper while preventing the paper from shifting, thereby feeding the paper onto the surface of the holding table 3.

[0030] Reference Figure 2 , Figure 3 , Figure 4 A height limiting plate 6 is installed at a position where the surface of the holding table 3 is aligned with the packaging forming cavity 5. A height adjustment knob 61 is rotatably mounted on the top of the height limiting plate 6. Rotating the knob 61 allows the height limiting plate 6 to move up and down. A stop plate extends from the lower end of the height limiting plate 6 away from the transverse push plate 32, so that when the transverse push plate 32 pushes the paper, the stop plate receives and abuts the other side of the paper. Simultaneously, rotating the height adjustment knob 61 adjusts the distance between the height limiting plate 6 and the holding table 3 according to the number of stacked papers, ensuring that the distance between them matches the paper height. This achieves stability throughout the paper's movement, preventing deviation during paper movement and avoiding impact on subsequent packaging processes. A longitudinal push plate 4 is movable on one side of the surface of the retention platform 3, located at the bottom of the height limit plate 6. The longitudinal push plate 4 is aligned with the center of the conveyor roller 51. A servo motor 44 is fixed on one side of the bottom inside the main frame 1. The output end of the servo motor 44 is perpendicular to the longitudinal push plate 4 at 90°. A gear is fixed on the output end of the servo motor 44. A transmission chain 43 is meshed on the surface of the gear. A gear connecting seat 42 is fixed on the end of the transmission chain 43 away from the servo motor 44 inside the main frame 1. A rotating tooth that meshes with the transmission chain 43 is provided on the top of the gear connecting seat 42, so that the rotation of the servo motor 44 drives the gear of the gear connecting seat 42 to rotate synchronously. A connecting rod is rotatably provided at the end of the gear connecting seat 42 away from the servo motor 44, and an inclined push plate 41 is rotatably provided at the end of the connecting rod away from the gear connecting seat 42. The bottom of the longitudinal push plate 4 extends downward, and the extended end of the longitudinal push plate 4 is rotatably connected to the inclined push plate 41, so that the connecting rod can receive the rotational force provided by the gear connecting seat 42 and convert the rotation into a longitudinal thrust applied to the inclined push plate 41, thereby causing the longitudinal push plate 4 to move longitudinally.

[0031] It should be noted that the rotation of the servo motor 44 is transmitted to the gear connecting seat 42 through the transmission chain 43, making the gear connecting seat 42 an integral crank structure. The gear connecting seat 42 is hinged to one end of the inclined push plate 41 with the internal gear as the eccentric point, and the other end of the inclined push plate 41 is hinged to the longitudinal push plate 4. The displacement of the longitudinal push plate 4... 42-degree angle with gear connector The relationship is: Where r is the eccentric radius of the gear connecting seat 42. The effective length of the tilting push plate 41 ensures the reciprocating closed loop of the motion.

[0032] Reference Figure 2 , Figure 5 , Figure 6 The film feeding structure 8 includes a mounting frame 81 fixed inside the main frame 1 and located on top of the conveying roller 51. The mounting frame 81 is rectangular in shape and is fixed to the inner surface of the main frame 1 by screws. A film storage roller 84 is rotatably arranged on one side of the inner surface of the mounting frame 81. The surface of the film storage roller 84 is covered with a packaging film for covering paper. A film feeding roller 82 is rotatably arranged on the other side of the inner surface of the mounting frame 81 located on the film storage roller 84. An auxiliary roller 83 is rotatably arranged on the inner surface of the mounting frame 81 and located between the film feeding roller 82 and the film storage roller 84. The auxiliary roller 83 is horizontally lower than the film feeding roller 82 and the film storage roller 84, so that the packaging film on the surface of the film storage roller 84 can extend sequentially to the surface of the auxiliary roller 83 and the film feeding roller 82. Through the horizontal staggering of the auxiliary roller 83 with the film feeding roller 82 and the film storage roller 84, the packaging film is kept in a taut state. Reference Figure 7 A linkage gear set 85 is provided on one side of the outer surface of the mounting frame 81. The linkage gear set 85 is composed of multiple gears, a gear chain, and a transmission structure. The central shafts of multiple gears in the linkage gear set 85 all movably pass through the mounting frame 81, and the passing ends of multiple gears are respectively connected to the central shafts of the film feeding roller 82, the auxiliary roller 83, and the film storage roller 84 by a flat key. Thus, the transmission structure drives multiple gears to rotate synchronously, thereby causing the film feeding roller 82, the auxiliary roller 83, and the film storage roller 84 to rotate synchronously to transport the packaging film. The synchronous rotation of the film feeding roller 82, the auxiliary roller 83, and the film storage roller 84 avoids the problem of packaging film damage caused by uneven speed. A floating tension rod is provided at the auxiliary roller 83. When the packaging film tension deviates from the set value, the floating tension rod adjusts the speed of the motor through a displacement sensor.

[0033] Reference Figure 2 , Figure 5 , Figure 6The laminating structure 7 includes a laminating port 71 located on one side of the packaging forming cavity 5 within the main frame 1. The laminating port 71 connects the packaging forming cavity 5 with the holding table 3, and the laminating port 71 is aligned with the center of the longitudinal push plate 4, so that the paper pushed by the longitudinal push plate 4 can enter the packaging forming cavity 5 through the laminating port 71. A waste trough is provided downward through the bottom surface of the packaging forming cavity 5 on one side of the laminating port 71. The waste trough is vertically aligned with the film feeding roller 82, so as to receive the packaging film conveyed downward by the film feeding roller 82. Tensioning rollers 75 are rotatably arranged at both ends of the inner wall of the waste trough. The two tensioning rollers 75 rotate towards each other, so as to assist in receiving the packaging film while providing auxiliary tension to the packaging film, keeping the packaging film taut, and avoiding loosening when covering the paper, which would affect the packaging. A front folding blade 72 is movable within the packaging forming cavity 5 on the side of the waste trough away from the film covering opening 71. The front folding blade 72 consists of two folding blades, one upper and one lower. Each folding blade has a drive structure at its end to drive the two folding blades to move back and forth. Side folding blades 73 are movable on both sides of the front folding blade 72 within the packaging forming cavity 5. The two sets of side folding blades 73 also consist of two folding blades, one upper and one lower, and are connected by a drive structure. The lower folding blades in the front folding blade 72 and the two sets of side folding blades 73 are in contact with the side surface of the paper, so that when the lower folding blade moves upward, it first drives the packaging film to cover the side surface of the paper. The horizontal distance between the upper and lower folding blades in the front folding blade 72 and the two sets of side folding blades 73 is set between 0.3mm and 0.7mm. When the lower folding blade moves upward to complete the downward folding of the packaging film, the upper folding blade moves downward to drive the packaging film to fold the paper upward. At the same time, when the upper folding blade moves down to the bottom, it cuts off the excess packaging film. A high-frequency electric heating device 74 is installed inside the main frame 1. The high-frequency electric heating device 74 has an induction coil built in it. The induction coil is arranged around the cutting area of ​​the front folding blade 72 and the side folding blade 73 to ensure that the magnetic field can uniformly cover the cutting part. When the high-frequency current passes through, an alternating magnetic field is generated. The magnetic field induces eddy current effect and heats up rapidly, so that the upper folding blade and the lower folding blade are located within the magnetic field range. The folding blade is used as a heat source so that the magnetic field can induce eddy current effect to heat up the packaging film, forming local indirect induction heating. Through heat conduction, the contacted packaging film reaches a melting state. The frequency of the high-frequency generator is locked in the industrial safety frequency band of 27.12MHz to ensure the sealing quality. The surface of the folding blade is covered with polytetrafluoroethylene to prevent the molten film from sticking. It should be noted that inclined folding plates 9 are movable on both sides of the conveyor roller 51 in the main frame 1. The surface of the inclined folding plate 9 is provided with a 45° guide slope to form a funnel-shaped convergence constraint when the paper stack is pushed in, correcting the axial deviation of the paper stack. A drive cylinder is provided on the opposite side of the two inclined folding plates 9. Under normal conditions, the distance between the two inclined folding plates 9 is less than the width of the paper, so that the paper abuts against the packaging film and paper when the paper is not packaged, thereby assisting the coverage of the packaging film. When the paper is packaged, the drive cylinder drives the two inclined folding plates 9 to move in opposite directions, so that the distance between the two inclined folding plates 9 is greater than the width of the paper, ensuring the transportation process after the paper is packaged.

[0034] The implementation principle of a paper packaging machine in this embodiment of the invention is as follows: Before using this device, the operator rotates the height adjustment knob 61 to lower the height limit plate 6 to be level with the height of the paper. The paper is placed on one side of the push plate 21 and is moved towards the main frame 1 by the conveyor belt 2. As the conveyor belt 2 pushes, the paper is fed into the surface of the retention table 3. Then the drive cylinder at the bottom of the retention table 3 runs, thereby driving the transverse push plate 32 to move along the moving groove 31. As the transverse push plate 32 moves, it pushes the paper that is stopped on the surface of the retention table 3 to move laterally. When the paper moves to the position aligned with the conveyor roller 51, the height limit plate 6 always abuts against the top of the paper, thereby avoiding the paper from shifting during the movement. Then, the servo motor 44 drives the transmission chain 43 to rotate. The transmission chain 43 meshes with the rotating teeth in the gear connecting seat 42, so that the rotating teeth rotate synchronously. The rotation of the rotating teeth applies a rotational force to the connecting rod. The connecting rod, the rotating teeth, and the inclined push plate 41 are all in a rotating connection state, thereby converting the rotational force into a lateral pulling force. This causes the inclined push plate 41 to pull the longitudinal push plate 4 to move in the direction of the conveying roller 51. The height limit plate 6, the abutment on one side of the height limit plate 6, and the longitudinal push plate 4 form a three-sided limiting effect on the paper, maintaining the neatness of the paper stack. As the paper is pushed in, the linkage gear set 85 operates, and through the synchronous rotation of multiple internal gears, the film storage roller 84, the auxiliary roller 83, and the film feeding roller 82 rotate synchronously, conveying the packaging film on the surface of the film storage roller 84 to the bottom of the inclined folding plate 9, and then sending it out through the waste trough to the packaging forming cavity 5. Then the paper enters through the film covering port 71 and comes into contact with the packaging film. At this time, the conveying roller 51 continues to rotate, so that the paper pushes the packaging film to move. As the paper moves, the packaging film covers the paper at the U-shaped part. When the packaging film completely covers the top and bottom edges of the paper, the two side folding blades 73 operate synchronously. The upper and lower folding blades of the side folding blades 73 move towards each other. The lower folding blade first moves upward to push the packaging film, which is wider than the paper, to cover the side of the paper from bottom to top. Then, the upper folding blade moves downward to push the packaging film to cover the side of the paper a second time. When the upper folding blade moves down to the bottom, it cuts the packaging film. While the side folding blades 73 are running, the front folding blade 72 operates synchronously. The upper and lower folding blades of the front folding blade 72 move towards each other, so that the packaging film covers the front edge of the paper and cuts the packaging film. When the front folding blade 72 and the side folding blade 73 cut the packaging film, the high-frequency electric heating device 74 operates. As the upper and lower folding blades in the front folding blade 72 and the side folding blade 73 move towards each other and approach each other, the electrodes of the other end of each folding blade contact to generate sparks, thereby causing the film at the cut position to melt locally, thus achieving the fusion and bonding of the packaging film. Finally, the conveying roller 51 drives the packaged paper to be sent out into the external receiving structure, completing the paper packaging process.

[0035] The above are merely optional embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations. 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 paper packaging machine, characterized in that: The system includes a main frame (1), a conveyor belt (2) for feeding paper is movably arranged on one side of the main frame (1), a holding platform (3) is arranged between the main frame (1) and the conveyor belt (2), a transverse push plate (32) for tidying up the paper is movably arranged on the surface of the holding platform (3), a height limiting plate (6) for limiting the stacking height of the paper is arranged inside the main frame (1) on one side of the holding platform (3), a longitudinal push plate (4) for moving the paper is movably arranged at the bottom of the height limiting plate (6), and a film-coating structure (7) for packaging the paper is arranged inside the main frame (1) on one side of the height limiting plate (6). A limiting baffle (10) is provided at one end of the film covering structure (7) away from the height limiting plate (6) inside the main frame (1). The limiting baffle (10) abuts against both sides of the packaging paper. An inclined folding plate (9) is slidably provided in the middle section of the limiting baffle (10). An exit limiting plate (11) is provided at one end of the limiting baffle (10) away from the height limiting plate (6). A film feeding structure (8) for conveying the packaging film is provided at the top of the limiting baffle (10) inside the main frame (1).

2. A paper packaging machine according to claim 1, characterized in that: The main frame (1) has a packaging forming cavity (5) in the middle. The main frame (1) has a conveying roller (51) for conveying packaging paper at the bottom center of the packaging forming cavity (5). The film covering structure (7) includes a film covering opening (71) on the side of the retention table (3) facing the longitudinal push plate (4). The film covering opening (71) connects the packaging forming cavity (5) and the retention table (3).

3. A paper packaging machine according to claim 2, characterized in that: A front folding blade (72) is movably disposed on one side of the film covering opening (71) in the packaging forming cavity (5). Side folding blades (73) are movably disposed on both sides adjacent to the front folding blade (72) in the packaging forming cavity (5). A high-frequency electric heating device (74) is fixedly disposed on one side of the packaging forming cavity (5). The high-frequency electric heating device (74) is connected to the front folding blade (72) and the side folding blades (73) for heat-melting the broken position of the packaging film.

4. A paper packaging machine according to claim 3, characterized in that: The packaging forming cavity (5) has a waste trough for discharging excess packaging film on one side adjacent to the bottom of the film covering port (71). Tensioning rollers (75) for tightening the packaging film are rotatably arranged on both sides of the waste trough.

5. A paper packaging machine according to claim 3, characterized in that: The film feeding structure (8) includes a mounting frame (81) fixed in the packaging forming cavity (5) on one side of the top of the conveying roller (51), and the film feeding roller (82) is rotatably arranged on the inner wall of the mounting frame (81) at the alignment with the front folding knife (72).

6. A paper packaging machine according to claim 5, characterized in that: An auxiliary roller (83) is rotatably arranged inside the mounting frame (81) on one side of the film feeding roller (82). The auxiliary roller (83) and the film feeding roller (82) are arranged at an angle to assist in tightening the packaging film. A film storage roller (84) is rotatably arranged inside the mounting frame (81) on the side of the auxiliary roller (83) away from the film feeding roller (82). The surface of the film storage roller (84) is provided with packaging film that is fed to the auxiliary roller (83).

7. A paper packaging machine according to claim 6, characterized in that: A linkage gear set (85) is fixed on one side of the outer surface of the mounting frame (81). The gears in the linkage gear set (85) are respectively fixed to the central shafts of the film storage roller (84), the auxiliary roller (83) and the film delivery roller (82), thereby driving the film storage roller (84), the auxiliary roller (83) and the film delivery roller (82) to rotate synchronously.

8. A paper packaging machine according to claim 1, characterized in that: A servo motor (44) is fixedly mounted on one side of the bottom of the main frame (1). A gear connecting seat (42) is fixedly mounted on one side of the servo motor (44). A transmission chain (43) for meshing and connecting with the gear connecting seat (42) is provided at the output end of the servo motor (44). An inclined push plate (41) is movably provided on the side of the gear connecting seat (42) away from the servo motor (44). The top of the inclined push plate (41) is rotatably connected to the longitudinal push plate (4).

9. A paper packaging machine according to claim 1, characterized in that: The height limit plate (6) is rotatably equipped with a height adjustment knob (61) on its top. The height adjustment knob (61) drives the height limit plate (6) to move up and down. Multiple push plates (21) are fixed inside the conveyor belt (2). The multiple push plates (21) abut against the paper to feed the paper into the device.

10. A paper packaging machine according to claim 1, characterized in that: The surface of the retention platform (3) is provided with a moving groove (31). A driving cylinder is provided at the bottom of the moving groove (31) in the main frame (1). The bottom of the transverse push plate (32) extends downward from the moving groove (31), and the extended end is fixedly connected to the output end of the driving cylinder.

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