An automatic plastic wrapping device for packaging material

Abstract

The utility model discloses an automatic plastic sealing device for packaging material belongs to packaging machinery field, including frame, be provided with film -depositing and punching mechanism, bag making mechanism, conveying branch mechanism, electrostatic sealing mechanism, bag sealing cutting mechanism in frame, film -depositing and punching mechanism, bag making mechanism, electrostatic sealing mechanism, bag sealing cutting mechanism are sequentially arranged along the direction of conveying branch mechanism material conveying, still include heat shrink oven for to the material that packages completely heat shrink plastic sealing to form the package, control system for sending control instruction and real -time feedback system parameter, the utility model discloses through each mechanism cooperation and control system parameter adjustment, realize the automation continuous bag making package of various specifications material as needed laminating, reduce the waste material generation from the source, significantly improve material utilization and production efficiency, be applicable to the plastic sealing package of many scene material.

Description

Technical Field

[0001] This utility model relates to the field of packaging machinery technology, and in particular to an automatic plastic sealing device for packaging materials. Background Technology

[0002] In automated production processes, packaging, as a crucial step after product manufacturing, plays a vital role in protecting products, enhancing added value, and promoting sales. Automated sealing equipment, due to its continuous and efficient operation, is widely used in various fields such as electronics, photovoltaics, and food. However, existing automatic sealing machines still suffer from the following technical shortcomings when handling materials of different specifications: the loading and positioning of the sealing tape rely on manual operation, leading to large loading deviations and low efficiency; different specifications of packaging materials require matching packaging consumables of corresponding specifications, and the adjustment of parameters such as bag width and sealing edge size relies on manual adjustment of the mechanical structure, a cumbersome process with insufficient precision, making it difficult to quickly adapt to materials of different sizes and affecting packaging efficiency; due to poor specification adaptability, redundant film waste is easily generated during the sealing process, increasing material costs and requiring additional waste disposal, which does not meet the requirements of energy-saving and environmentally friendly production. To address these issues, there is an urgent need to develop an automatic sealing machine that is flexible, efficient, and adaptable to materials of multiple specifications. By optimizing the equipment structure and automated control system, the machine can achieve universal consumables, automated adjustment, and continuous packaging to meet the high-efficiency packaging needs of materials of multiple specifications. Utility Model Content

[0003] The purpose of this invention is to provide an automatic sealing device for packaging materials, which overcomes the shortcomings of existing automatic sealing machines, such as poor versatility of consumables, high degree of manual intervention, insufficient equipment adaptability, and low film utilization. It enables automated continuous sealing packaging of materials of various specifications, improves packaging efficiency and quality, and reduces consumable costs and reliance on manual labor.

[0004] To achieve the above objectives, this utility model provides an automatic plastic sealing device for packaging materials, including a frame. Inside the frame are a film feeding and perforation mechanism, a bag making mechanism, a conveying and distributing mechanism, an electrostatic sealing mechanism, and a bag sealing and cutting mechanism. The film feeding and perforation mechanism, bag making mechanism, electrostatic sealing mechanism, and bag sealing and cutting mechanism are arranged sequentially along the material conveying direction of the conveying and distributing mechanism. The film feeding and perforation mechanism is located at the top of the frame, above the conveying and distributing mechanism, and the electrostatic sealing mechanism is located below the bag making mechanism. It also includes heat shrink ovens, which are used to heat shrink and seal packaged materials into a finished package; The control system is used to send control commands and provide real-time feedback of system parameters.

[0005] Preferably, the conveying and material distribution mechanism includes conveyor belt one, conveyor belt two, and conveyor belt three. Conveyor belt one, conveyor belt two, and conveyor belt three are arranged sequentially according to the direction of material conveying, and conveyor belt two and conveyor belt three are located on both sides of the sealing and cutting mechanism.

[0006] Preferably, the film feeding and perforation mechanism includes two vertical plates set at the top of the frame, with a film feeding shaft one and a film feeding shaft two rotatably arranged between the two vertical plates. A film roll for feeding POF heat shrink film is set on the film feeding shaft one and the film feeding shaft two. The film roll is limited between the vertical plates by a positioning structure. A guide rod one and a guide rod two are fixedly connected between the two vertical plates. The guide rod one is located above the guide rod two. A tensioning structure for adjusting the tension of the POF heat shrink film is also provided between the two vertical plates. A film perforation structure for perforating the POF heat shrink film is provided below the film feeding shaft two. The positioning structure includes positioning frames located on both sides of the film roll, the positioning frames being slidably mounted on positioning rods, and the two ends of the positioning rods being connected to the upright plates; The tensioning structure includes a swing arm 1, one end of which is provided with a film tensioning rod, and the other end of the swing arm 1 is hinged to the vertical plate. The POF heat shrink film passes around the guide rod 1 and then passes the film tensioning rod and the guide rod 2 in sequence. The film perforation structure includes a needle roller located below the second film-feeding shaft. POF heat-shrinkable film passes between the needle roller and the second film-feeding shaft. The needle roller is positioned at one end of a second swing arm and is rotatably connected to the second swing arm. A rotating shaft is located at the other end of the second swing arm and is rotatably connected to a vertical plate. A sliding rod is mounted on the rotating shaft to drive the rotation of the second swing arm. The end of the sliding rod is tensioned by a spring; one end of the spring is connected to the end of the sliding rod, and the other end is connected to the vertical plate. The needle roller presses the POF heat-shrinkable film below the second film-feeding shaft using the spring force. A fulcrum cam is rotatably mounted on the vertical plate, with an adjusting rod and a sliding surface adapted to the sliding rod. The sliding rod is positioned on and slidably connected to the sliding surface. The film perforation structure presses the POF heat-shrinkable film below the second film-feeding shaft using a spring lever. The rotation of the second film-feeding shaft drives the needle roller of the film perforation structure to rotate, completing the perforation of the POF heat-shrinkable film surface.

[0007] Preferably, the bag making mechanism includes a fixed plate mounted on a frame, and the fixed plate is provided with a width adjustment structure for adjusting the width of the plastic bag made of POF heat shrink film, and the width adjustment structure is connected to a height adjustment structure for adjusting the height of the plastic bag made of POF heat shrink film. The width adjustment structure includes width adjustment plates located on both sides of the conveyor belt, and a long slot is provided on the fixed plate. The top of the width adjustment plate is locked to the long slot of the fixed plate by bolts. The height adjustment structure includes height adjustment blocks located on both sides of the second conveyor belt. The width adjustment plate is provided with an elongated hole. The height adjustment blocks are locked to the elongated hole of the width adjustment plate by bolts. A U-shaped rod is connected to the height adjustment block. A support frame is provided inside the U-shaped rod. The support frame is connected to the width adjustment plate. A support frame is provided below the support frame. The support frame is connected to the bottom end of the width adjustment plate.

[0008] Preferably, the POF heat shrink film of the film roll is double-folded.

[0009] Preferably, there are two unpowered rollers below the second conveyor belt, which are rotatably connected to the frame. The electrostatic sealing mechanism includes a connecting frame, and a film pressing and feeding roller for conveying folded POF heat shrink film is provided above the connecting frame. The film pressing and feeding roller presses the POF heat shrink film between the two unpowered rollers below the second conveyor belt. The film pressing and feeding roller is connected to the conveyor shaft of the drive motor through a synchronous belt structure. The drive motor is located at the bottom of the connecting frame. An electrostatic generator for sealing the bottom of the plastic bag is provided on the side of the connecting frame. The bottom of the drive motor is connected to a clamping cylinder, which is fixed on the frame.

[0010] Preferably, the sealing and slitting mechanism includes a gantry frame mounted on a machine frame. Inside the gantry frame are an upper hot-cutting assembly, a lower cutting edge assembly, and a drive cylinder for driving the two to move in opposite directions. The drive cylinder is located below the lower cutting edge assembly, and the cylinder rod of the drive cylinder is connected to the lower cutting edge assembly. The upper hot-cutting assembly and the lower cutting edge assembly move in opposite directions through an opposing structure. The opposing structure includes two sprockets mounted inside the gantry frame, with a chain wound around the two sprockets. The upper hot-cutting assembly is connected to one side of the chain, and the lower cutting edge assembly is connected to the other side of the chain.

[0011] Preferably, the contact surfaces of the upper hot-cutting assembly and the lower cutting edge assembly are on the same plane as the upper surface of the second conveyor belt.

[0012] Preferably, the control system controls the bag making mechanism, the film feeding and punching mechanism, the conveying and distributing mechanism, the electrostatic sealing mechanism, and the bag sealing and cutting mechanism respectively.

[0013] Therefore, this utility model provides an automatic shrink-sealing device for packaging materials with the aforementioned structure. Through a control system, it controls the film feeding and punching mechanism, bag making mechanism, electrostatic sealing device, bag sealing and cutting mechanism, and heat shrink oven, achieving automated continuous shrink-sealing of packaging materials. Each mechanism is fixed to a frame and works collaboratively. The bag making mechanism is adjustable in width and height to accommodate materials of different specifications. The electrostatic sealing device achieves non-thermal sealing through electrostatic bonding. The bag sealing and cutting mechanism simultaneously completes sealing and cutting using a thermal cutting method. The heat shrink oven uses controllable heating to ensure the heat shrink film tightly wraps the product, significantly improving packaging efficiency, reducing manual intervention, and minimizing film waste. Furthermore, the heat shrink film shrunk by this utility model has a smooth surface and good light transmittance, clearly displaying the product's appearance or printed brand information and promotional content, thus combining protection and aesthetics.

[0014] The technical solution of this utility model will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0015] Figure 1 This is a front structural diagram of an automatic plastic sealing device for packaging materials; Figure 2 This is a schematic diagram of the film-feeding and perforating mechanism of an automatic plastic sealing device for packaging materials; Figure 3 This is a schematic diagram of the bag-making mechanism of an automatic sealing device for packaging materials; Figure 4 This is a side view of the POF heat shrink film connection structure of an automatic sealing device for packaging materials; Figure 5 This is a perspective view of an electrostatic sealing component of an automatic plastic sealing device for packaging materials. Figure 6 This is a side view of the electrostatic sealing assembly of an automatic plastic sealing device for packaging materials. Figure 7 This is a schematic diagram of the sealing and cutting mechanism of an automatic plastic sealing device for packaging materials; Figure 8 This is a schematic diagram of a heat shrink oven, an automatic sealing device for packaging materials.

[0016] In the diagram: 1. Frame; 2. Film feeding and perforation mechanism; 3. Bag making mechanism; 4. Conveying and distributing mechanism; 5. Electrostatic sealing mechanism; 6. Bag sealing and cutting mechanism; 7. Heat shrink oven; 8. Conveyor belt one; 9. Conveyor belt two; 10. Conveyor belt three; 11. Vertical plate; 12. Film feeding shaft one; 13. Film feeding shaft two; 14. Film roll; 15. POF heat shrink film; 16. Guide rod one; 17. Guide rod two; 18. Swing arm two; 19. Slide rod; 20. Needle roller; 21. Film tensioning rod; 22. Swing arm one; 23. Pivot cam; 24. Adjusting rod; 25. Positioning frame; 26. Positioning rod; 27. 28. Fixed plate; 29. ​​Width adjustment structure; 30. Height adjustment structure; 31. Width adjustment plate; 32. Long strip hole one; 33. Height adjustment block; 34. Long strip hole two; 35. U-shaped rod; 36. Support frame one; 37. Support frame two; 38. Connecting frame; 39. Film pressing and feeding roller; 40. Synchronous belt structure; 41. Conveyor shaft; 42. Drive motor; 43. Static generator; 44. Tightening cylinder; 45. Gantry frame; 46. Upper hot cutting assembly; 47. Lower cutting edge assembly; 48. Sprocket; 49. Chain; 50. Drive cylinder; 51. Rotary shaft; 52. Unpowered roller. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of the present utility model embodiments clearer, the present utility model embodiments will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for explaining the present utility model embodiments and are not intended to limit the present utility model embodiments. All other embodiments obtained by those skilled in the art based on the embodiments in this application without creative effort are within the scope of protection of this application. Examples of embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0018] It should be noted that the terms “comprising” and “having”, and any variations thereof, are intended to cover non-exclusive inclusion, such as a process, method, system, product, or server that includes a series of steps or units, not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such processes, methods, products, or devices.

[0019] Similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0020] In the description of this utility model, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing this utility model 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 utility model.

[0021] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] Example: like Figure 1 As shown, the automatic sealing device for packaging materials according to this utility model includes a frame 1. Inside the frame 1 are a film feeding and punching mechanism 2, a bag making mechanism 3, a conveying and distributing mechanism 4, an electrostatic sealing mechanism 5, and a bag sealing and cutting mechanism 6. The film feeding and punching mechanism 2, the bag making mechanism 3, the electrostatic sealing mechanism 5, and the bag sealing and cutting mechanism 6 are arranged sequentially along the direction of material conveying by the conveying and distributing mechanism 4.

[0023] like Figure 1 As shown, the conveying and distributing mechanism 4 includes conveyor belt 8, conveyor belt 9, and conveyor belt 10. Conveyor belts 8, 9, and 10 are arranged sequentially according to the direction of material conveying. Conveyor belts 9 and 10 are located on both sides of the sealing and cutting mechanism 6. The conveying and distributing mechanism 4 runs through both ends of the frame 1, realizing the separation of the feeding gap and the orderly conveying of the material after sealing.

[0024] like Figure 1 , Figure 2As shown, the film-laying and perforating mechanism 2 is located at the top of the frame 1, above the conveying and distributing mechanism 4. The film-laying and perforating mechanism 2 includes two upright plates 11 at the top of the frame 1, with a first film-laying shaft 12 and a second film-laying shaft 13 rotatably mounted between the two upright plates 11. Film rolls 14 for unwinding POF heat-shrinkable film 15 are mounted on the first film-laying shaft 12 and the second film-laying shaft 13. The second film-laying shaft 13 is driven by an existing motor via a pulley drive, providing the active power for unwinding the film roll 14, while the first film-laying shaft 12 serves as an auxiliary support shaft to support the film roll 14. The film roll 14 is positioned between the upright plates by a positioning structure. The positioning structure includes positioning frames 25 located on both sides of the film roll 14, with the positioning frames 25 slidably mounted on positioning rods 26, both ends of which are fixedly connected to the upright plates 11. The membrane roll 14 is mounted above the first unwinding shaft 12 and the second unwinding shaft 13. It is axially limited by its own weight and the positioning frame 25 to prevent the membrane roll 14 from moving during unwinding. The positioning frame 25 is locked and fixed by existing locking elements.

[0025] like Figure 2 , Figure 4 As shown, guide rod 16 and guide rod 27 are fixedly connected between the two upright plates 11, with guide rod 16 located above guide rod 27. A tensioning structure for adjusting the tension of the POF heat-shrinkable film 15 is also provided between the two upright plates 11. The tensioning structure includes a swing arm 22, one end of which is equipped with a film tensioning rod 21, and the other end of the swing arm 22 is hinged to the upright plate 11. The POF heat-shrinkable film 15 passes over guide rod 16 and then sequentially passes through film tensioning rod 21 and guide rod 27. Guide rod 16 and guide rod 27 are used to change the conveying direction of the POF heat-shrinkable film 15, ensuring that the POF heat-shrinkable film 15 enters the subsequent process according to the preset path; the swing arm 22 is used to dynamically adjust the tension of the POF heat-shrinkable film 15, maintaining stable tension during unwinding and processing.

[0026] Below the second film-laying shaft 13, a film-perforating structure for perforating the POF heat-shrinkable film 15 is provided. The film-perforating structure includes a needle roller 20, located below the second film-laying shaft 13. The needle roller 20 is positioned at one end of the second swing arm 18 and is rotatably connected to the second swing arm 18. At the other end of the second swing arm 18, a rotating shaft 50 is provided, rotatably connected to the upright plate 11. A slide rod 19 is mounted on the rotating shaft 50. A fulcrum cam 23 is rotatably mounted on the upright plate 11, and an adjusting rod 24 is mounted on the fulcrum cam 23. The fulcrum cam 23 has a sliding surface adapted to the slide rod 19, and the slide rod 19 is mounted on and slidably connected to the sliding surface. The adjusting rod 24 rotates the fulcrum cam 23, causing the slide rod 19 to slide on the sliding surface. The slide rod 19's movement causes the rotating shaft 50 to rotate, which in turn causes the swing arm 18 to rotate. The rotation of the swing arm 18 moves the needle roller 20, thereby adjusting the distance between the needle roller 20 and the film-laying shaft 13. The end of the slide rod 19 is tensioned by a spring, with one end of the spring connected to the end of the slide rod 19 and the other end connected to the upright plate 11. The needle roller 20 presses the POF heat-shrink film 15 under the film-laying shaft 13 through the spring force. The fulcrum cam 23, slide rod 18, rotating shaft 50, swing arm 18, and spring form a lever structure. The film perforation structure presses the POF heat-shrink film 15 under the film-laying shaft 13 through the spring lever. The rotation of the film-laying shaft 13 drives the needle roller 20 of the film perforation structure to rotate, completing the perforation of the POF heat-shrink film 15 surface.

[0027] The POF heat-shrink film 15 unwound from film roll 14 is double-folded. The POF heat-shrink film 15 passes between needle roller 20 and unwinding shaft 13, then sequentially passes guide rod 16, film tension rod 21, and guide rod 17 before entering bag-making mechanism 3. During rotation, the needles on needle roller 20 contact the POF heat-shrink film 15, creating evenly distributed holes on its surface. After perforation, the POF heat-shrink film 15 forms a sealed bag, effectively expelling air from inside the bag during the heat-shrink oven forming and wrapping process.

[0028] like Figure 3As shown, the bag-making mechanism 3 includes a fixed plate 27 mounted on the frame 1. The fixed plate 27 has a width adjustment structure 28 for adjusting the width of the plastic-sealed bags made from POF heat-shrink film 15. The width adjustment structure 28 includes width adjustment plates 30 located on both sides of the conveyor belt 9. The fixed plate 27 has an elongated hole 31, and the top of the width adjustment plate 30 is bolted to the elongated hole 31 of the fixed plate 27. The width adjustment structure 28 is connected to a height adjustment structure 29 for adjusting the height of the plastic-sealed bags made from POF heat-shrink film 15. The height adjustment structure 29 includes height adjustment blocks 32 located on both sides of the conveyor belt 9. The width adjustment plates 30 have elongated holes 33, and the height adjustment blocks 32 are bolted to the elongated holes 33 of the width adjustment plates 30. A U-shaped rod 34 is connected to the height adjustment block 32, and a support frame 35 is installed inside the U-shaped rod 34. The support frame 35 is connected to the width adjustment plate 30. A second support frame 36 is provided below the first support frame 35, and the second support frame 36 is connected to the bottom end of the width adjustment plate 30. After the POF heat shrink film 15 unwound from the film roll 14 is led out from the film unwinding and punching mechanism 2, the two folded ends are opened and passed through the U-shaped rod 34 respectively. After passing through the outside of the first support frame 35, it is guided to the second support frame 36 and folded around the bottom of the second support frame 36, so that the two ends of the POF heat shrink film 15 meet below the second support frame 36.

[0029] like Figure 5 , Figure 6 As shown, there are two unpowered rollers 51 below the second conveyor belt 9, which are rotatably connected to the frame 1. The electrostatic sealing mechanism 5 is located below the bag-making mechanism 3. The electrostatic sealing mechanism 5 includes a connecting frame 37. Above the connecting frame 37 is a film-pressing feed roller 38 for conveying the folded POF heat-shrink film 15. The film-pressing feed roller 38 presses the POF heat-shrink film 15 between the two unpowered rollers 51 below the second conveyor belt 9. The film-pressing feed roller 38 is connected to the conveyor shaft 40 of the drive motor 41 via a synchronous belt structure 39, which uses an existing structure. The drive motor 41 is located at the bottom of the connecting frame 37, and an electrostatic generator 42 for sealing the bottom of the plastic bag is located on the side of the connecting frame 37. The bottom of the drive motor 41 is connected to a clamping cylinder 43, which is fixed to the frame 1. The tightening cylinder 43 drives the connecting frame 37 to move up and down, thereby pressing the film pressing and feeding roller 38 to perform bottom electrostatic sealing on the POF heat shrink film 15 that converges after passing around the support frame 2 36, thus improving the sealing effect.

[0030] like Figure 7As shown, the bag sealing and slitting mechanism 6 includes a gantry frame 44 mounted on a frame 1. The gantry frame 44 houses an upper heat-cutting assembly 45, a lower blade assembly 46, and a drive cylinder 49 for driving them to move in opposite directions. The upper heat-cutting assembly 45 and the lower blade assembly 46 employ a conventional upper and lower type slitting and heat-sealing knife structure. The drive cylinder 49 is located below the lower blade assembly 46, and the upper heat-cutting assembly 45 and the lower blade assembly 46 move in opposite directions via an opposing structure. The opposing structure includes two sprockets 47 mounted inside the gantry frame 44, with chains 48 wound around them. The upper heat-cutting assembly 45 is connected to one side of the chain 48, and the lower blade assembly 46 is connected to the other side of the chain 48. The drive cylinder 49 drives the lower cutting edge assembly 46 to move upward. The lower cutting edge assembly 46 drives one side of the chain 48 to move upward, and the other side of the chain 48 to move downward, thereby driving the upper heat-cutting assembly 45 to move downward, so that the upper heat-cutting assembly 45 and the lower cutting edge assembly 46 move towards each other. The contact surface of the upper heat-cutting assembly 45 and the lower cutting edge assembly 46 is on the same plane as the upper surface of the second conveyor belt 9, which facilitates the cutting and heat-sealing of the plastic bags conveyed by the second conveyor belt 9.

[0031] like Figure 8 As shown, the automatic shrink-sealing device for packaging materials also includes a heat-shrink oven 7, which is an existing device. The core function of the heat-shrink oven 7 is to activate the "memory effect" of the heat-shrink material through controlled heating. That is, by utilizing the property of the heat-shrink material to restore its original shape after being pre-stretched and shaped, it can achieve multiple processing effects on the items. After heating the POF heat-shrink film 15 wrapped around the product, the film will tightly adhere to the product surface to form a sealed protective layer, effectively isolating air, moisture and dust, thereby extending the shelf life of products such as food and electronic components. For multiple products or irregularly shaped items, the POF heat-shrink film 15 can firmly bind them into a whole by its own internal stress after shrinking, avoiding scattering or collision damage during transportation, while simplifying the warehousing and handling process. In addition, the shrunken POF heat-shrink film 15 has a smooth surface and good light transmittance, which can clearly display the product appearance or printed brand information and promotional content, combining protection and aesthetics.

[0032] The control system utilizes an existing system, automatically adjusting the film feeding speed of the film feeding and perforation mechanism 2, the bag size of the bag making mechanism 3, the sealing strength of the electrostatic sealing mechanism 5, the cutting position of the bag sealing and cutting mechanism 6, and the conveying speed of the conveying and distributing mechanism 4 based on preset programs and sensor feedback signals, thus achieving coordinated operation of each mechanism. The control system includes a control panel located on the automatic sealing device, controlled by the following buttons: a red button for emergency stop or normal shutdown, a green button for starting the equipment, a yellow button for system reset (restoring to initial state), and a blue button for jog operation (single or step-by-step action control). A touchscreen on the control panel displays the current status.

[0033] In operation, the control system is activated, and the motors of each mechanism are started. The material to be packaged is placed on the conveying and sorting mechanism 4, and the material is separated one by one by the conveying and sorting mechanism 4. The film-laying and perforating mechanism 2 perforates the POF heat-shrink film 15 through the film perforation structure. After perforation, the POF heat-shrink film 15 is passed through the bag-making mechanism 3, which adjusts the width and height of the plastic bag according to the set parameters and performs electrostatic sealing, adhering the bottom long side interface of the plastic bag. Then, it is conveyed through the conveying and sorting mechanism 4 to the sealing and cutting mechanism 6. The upper heat-cutting component 45 and the lower cutting edge component 46 work together to complete the heat-sealing and cutting. The sealed material enters the heat-shrinking oven 7, where the heat-shrink film tightly wraps the material. Finally, the wrapped material is output for sorting or packaging.

[0034] Therefore, this utility model achieves automated continuous bag making and sealing of various specifications of materials on demand by coordinating the various mechanisms and adjusting the control system parameters. It reduces waste generation from the source, significantly improves material utilization and production efficiency, and is suitable for plastic sealing packaging of materials in multiple scenarios.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and not to limit it. Although the utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can still be made to the technical solution of this utility model, and these modifications or equivalent substitutions cannot cause the modified technical solution to deviate from the spirit and scope of the technical solution of this utility model.

Claims

1. An automatic plastic sealing device for packaging materials, characterized in that: The machine includes a frame, inside which are installed a film feeding and punching mechanism, a bag making mechanism, a conveying and distributing mechanism, an electrostatic sealing mechanism, and a bag sealing and cutting mechanism. The film feeding and punching mechanism, the bag making mechanism, the electrostatic sealing mechanism, and the bag sealing and cutting mechanism are arranged sequentially along the direction of material conveying by the conveying and distributing mechanism. The film feeding and punching mechanism is located at the top of the frame, above the conveying and distributing mechanism, and the electrostatic sealing mechanism is located below the bag making mechanism. It also includes heat shrink ovens, which are used to heat shrink and seal packaged materials into a finished package; The control system is used to send control commands and provide real-time feedback of system parameters.

2. The automatic sealing device for packaging materials according to claim 1, characterized in that: The conveying and material distribution mechanism includes conveyor belt one, conveyor belt two, and conveyor belt three. Conveyor belt one, conveyor belt two, and conveyor belt three are arranged sequentially according to the direction of material conveying. Conveyor belt two and conveyor belt three are located on both sides of the sealing and cutting mechanism.

3. An automatic sealing device for packaging materials according to claim 1, characterized in that: The film feeding and punching mechanism includes two vertical plates set at the top of the frame. A film feeding shaft one and a film feeding shaft two are set between the two vertical plates. A film roll of POF heat shrink film is set on the film feeding shaft one and the film feeding shaft two. The film roll is limited between the vertical plates by a positioning structure. A guide rod one and a guide rod two are fixedly connected between the two vertical plates. The guide rod one is located above the guide rod two. A tensioning structure for adjusting the tension of the POF heat shrink film is also set between the two vertical plates. A film punching structure for punching holes in the POF heat shrink film is set below the film feeding shaft two. The positioning structure includes positioning frames located on both sides of the film roll, the positioning frames being slidably mounted on positioning rods, and the two ends of the positioning rods being connected to the upright plates; The tensioning structure includes a swing arm 1, one end of which is provided with a film tensioning rod, and the other end of the swing arm 1 is hinged to the vertical plate. After the POF heat shrink film passes around the guide rod 1, the film tensioning rod and the guide rod 2 are connected in sequence. The film perforation structure includes a needle roller located below the second film feeding shaft. POF heat shrink film passes between the needle roller and the second film feeding shaft. The needle roller is located at one end of the second swing arm and is rotatably connected to the second swing arm. The other end of the second swing arm is equipped with a rotating shaft, which is rotatably connected to a vertical plate. A sliding rod is provided on the rotating shaft to drive the second swing arm to rotate. A fulcrum cam is rotatably provided on the vertical plate. An adjusting rod is provided on the fulcrum cam, and a sliding surface adapted to the sliding rod is provided on the fulcrum cam. The sliding rod is located on the sliding surface and is slidably connected to the sliding surface.

4. An automatic sealing device for packaging materials according to claim 1, characterized in that: The bag-making mechanism includes a fixed plate mounted on a frame, and a width adjustment structure for adjusting the width of the plastic bag made of POF heat-shrink film is provided on the fixed plate. The width adjustment structure is connected to a height adjustment structure for adjusting the height of the plastic bag made of POF heat-shrink film. The width adjustment structure includes width adjustment plates located on both sides of the conveyor belt, and a long slot is provided on the fixed plate. The top of the width adjustment plate is locked to the long slot of the fixed plate by bolts. The height adjustment structure includes height adjustment blocks located on both sides of the second conveyor belt. The width adjustment plate is provided with an elongated hole. The height adjustment blocks are locked to the elongated hole of the width adjustment plate by bolts. A U-shaped rod is connected to the height adjustment block. A support frame is provided inside the U-shaped rod. The support frame is connected to the width adjustment plate. A support frame is provided below the support frame. The support frame is connected to the bottom end of the width adjustment plate.

5. An automatic sealing device for packaging materials according to claim 3, characterized in that: The POF heat shrink film used for film roll-up is double-folded.

6. An automatic sealing device for packaging materials according to claim 4, characterized in that: The electrostatic sealing mechanism includes a connecting frame, with a film pressing and feeding roller for conveying folded POF heat shrink film above the connecting frame. The film pressing and feeding roller is connected to the conveying shaft of the drive motor via a synchronous belt structure. The drive motor is located at the bottom of the connecting frame. An electrostatic generator for sealing the bottom of the plastic bag is located on the side of the connecting frame. The bottom of the drive motor is connected to a clamping cylinder, which is fixed on the frame.

7. An automatic sealing device for packaging materials according to claim 1, characterized in that: The bag sealing and cutting mechanism includes a gantry frame mounted on a machine frame. Inside the gantry frame are an upper hot-cutting assembly, a lower cutting edge assembly, and a drive cylinder for driving the two to move in opposite directions. The drive cylinder is located below the lower cutting edge assembly, and the cylinder rod of the drive cylinder is connected to the lower cutting edge assembly. The upper hot-cutting assembly and the lower cutting edge assembly move in opposite directions through an opposing structure. The opposing structure includes two sprockets mounted inside the gantry frame, with a chain wound around the two sprockets. The upper hot-cutting assembly is connected to one side of the chain, and the lower cutting edge assembly is connected to the other side of the chain.

8. An automatic sealing device for packaging materials according to claim 7, characterized in that: The contact surfaces of the upper hot-cutting assembly and the lower cutting edge assembly are on the same plane as the upper surface of the second conveyor belt.

9. An automatic sealing device for packaging materials according to claim 1, characterized in that: The control system controls the bag making mechanism, film feeding and punching mechanism, conveying and distributing mechanism, electrostatic sealing mechanism, and bag sealing and cutting mechanism respectively.

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