A cutting device for sealing edges of express bags

Abstract

The utility model relates to express bag production technical field provides an express bag edge sealing cutting device with high finished product edge strength, low finished product waste rate and high automation degree, including base and setting in the base one side is used for with express bag film is sent into the base and carries out processing the film feeding machine, the base body is equipped with the edge sealing cutting machine, the edge sealing cutting machine includes setting in the base body is used for fixing whole device's crossbeam and setting in the crossbeam is used for providing the down pressure and absorbing reaction force's down pressure air cylinder, the down pressure air cylinder lower extreme is equipped with the cutting knife structure for cutting off with hot melt express bag, the cutting knife structure includes setting in the down pressure air cylinder lower extreme's electric heating block and setting in the electric heating block bottom's cutting knife, the electric heating block bottom is located the position of cutting knife side edge and is integrally formed with hot head structure, the clearance between hot head structure and cutting knife is 0.1mm 5mm.

Description

Technical Field

[0001] This utility model relates to the field of express bag production technology, specifically to an express bag sealing and cutting device. Background Technology

[0002] Express delivery bags are widely used in the express delivery industry to wrap documents, invoices, goods, and other packages. They are usually made of polyethylene, which is low in manufacturing cost, strong in toughness, waterproof, moisture-proof, lightweight, and convenient. During the production of express delivery bags, two layers of film are first laminated together, and then pressed down with a sealing knife to fuse the two layers of film together. The sealing knife is very hot, and while pressing down, it also burns the fused film from the middle to form individual express delivery bags. The process is highly automated and produces clean cut edges, greatly improving the efficiency of express delivery bag processing.

[0003] Chinese patent CN207496113U discloses an automatic cutting device for express delivery bags, characterized by comprising a base, upper and lower film feeding rollers disposed on the left side of the base, a side heat sealing device disposed on the front end of the left side of the upper surface of the base, and a heat sealing device disposed on the right side of the upper surface of the base. The side heat sealing device is parallel to the front end of the base, and the heat sealing device is parallel to the side of the base. This patent enables automatic cutting of express delivery bags, improving the production efficiency of express delivery bags. The automatic cutting device receives upper and lower films from the feeding device, and achieves cutting and sealing through the side heat sealing device and the heat sealing device. At the same time, the size of the express delivery bag can be adjusted as needed without replacing other devices.

[0004] Although the aforementioned patents can solve the corresponding technical problems, they still have certain drawbacks: the existing automatic cutting devices use a single heat-sealing device to squeeze the express bag, thereby breaking the edge of the bag and simultaneously burning and melting it together through high temperature to achieve the purpose of sealing and cutting at the same time. However, the produced express bag only has one closed edge formed by burning. The express bag is often stretched during use, and it is easy for cracks to occur at the burned edge, resulting in poor sealing strength of the express bag and difficulty in effectively protecting the contents inside. Utility Model Content

[0005] The purpose of this utility model is to address the shortcomings and deficiencies of the existing technology by providing a courier bag sealing and cutting device with high edge strength, low scrap rate, and high degree of automation.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a sealing and cutting device for express delivery bags, comprising a base and a film feeding machine disposed on one side of the base for feeding express delivery bag film onto the base for processing. The base includes a base body and a guide roller disposed on the inner wall of the base body near the film feeding machine. The sealing and cutting machine is disposed on the base body, and the sealing and cutting machine includes a crossbeam disposed on the base body for fixing the entire device and a support on the crossbeam for providing downward pressure and absorbing reaction force. The downward-pressing cylinder has a cutting structure at its lower end for cutting and heat-sealing the express bag. The cutting structure includes an electric heating block located at the lower end of the cylinder and a cutting blade located at the bottom of the electric heating block. A hot pressing head structure is integrally formed at the bottom of the electric heating block, located on the side of the cutting blade. The gap between the hot pressing head structure and the cutting blade is 0.1mm-5mm. The express bag is fed under the cutting blade, and the downward-pressing cylinder presses down the electric heating block and simultaneously presses down the cutting blade and the hot pressing head structure to heat-seal and cut the express bag.

[0007] A further improvement is that the hot press head structure includes a first hot press head integrally formed at the bottom of the heating block and located on one side of the cutter.

[0008] A further improvement is that the hot press head structure also includes a second hot press head integrally formed on the bottom of the heating block and located on the other side of the cutter.

[0009] A further improvement is that the gap between the first hot press head and the cutter is 0.1mm-3mm.

[0010] A further improvement is that the gap between the second hot press head and the cutter is 0.1mm-3mm.

[0011] A further improvement is that a fixing cylinder is provided on the side wall of the crossbeam, and a flattening frame for express bags is provided at the bottom of the fixing cylinder.

[0012] A further improvement is that the end of the crossbeam is also provided with a lifting frame that allows the crossbeam to rise and fall.

[0013] A further improvement is that a limiting frame for limiting the upward height of the cutter is also provided through the crossbeam, and the lower end of the limiting frame is in contact with the upper surface of the cutter.

[0014] A further improvement is that the gap between the first hot press head and the cutter is 0.1mm-1.5mm.

[0015] A further improvement is that the gap between the first hot press head and the cutter is 0.1mm-1.5mm.

[0016] A further improvement is that the base body is also provided with a straightening frame for pulling the express bag film upwards, and a flattening roller is provided inside the inner wall of the base body between the straightening frame and the edge sealing and cutting machine. An arc-shaped guide is provided on the side of the flattening roller near the straightening frame.

[0017] A further improvement is that a winding roller assembly is provided in the inner wall of the base body at the position between the guide roller and the straightening frame.

[0018] A further improvement is that the film feeding machine includes a connecting block disposed on one side of the base and an inlet roller disposed within the connecting block. The inner wall of the connecting block near the base is also provided with several vertically distributed fixed rollers. The inner wall of the connecting block away from the base is provided with a first swing roller frame. The connecting block is provided with a first tension cylinder, one end of which is movably engaged with the inner wall of the connecting block, and the other end of the first tension cylinder is movably engaged with one side of the first swing roller frame.

[0019] A further improvement is that a second swing roller frame is movably engaged on the inner wall of the connecting block above the fixed roller, and a second tension cylinder is movably engaged on one side of the second swing roller frame. The end of the second tension cylinder away from the second swing roller frame is movably engaged with the inner wall of the connecting block.

[0020] A further improvement is that the top of the connecting block is also equipped with a speed tester for detecting the membrane transmission speed.

[0021] A further improvement is that a finished product placement platform is provided on the other side of the base body.

[0022] A further improvement is that a compaction frame is provided on the upper surface of the base body at the corresponding position of the connection end of the finished product placement platform.

[0023] A further improvement is that the base body is also provided with an adhesive sealing device, which includes a mounting plate fixedly connected to the base and an adhesive sealing strip tube disposed on one side of the mounting plate. The mounting plate is provided with a feeding roller and a first drive motor connected to the feeding roller via a belt.

[0024] A further improvement is that the mounting plate is also equipped with a pull-out roller and a second drive motor connected to the pull-out roller via a belt.

[0025] A further improvement is that: several guide rollers are fixedly provided on the mounting plate, a third swing roller frame is movably engaged on the mounting plate below the guide rollers, and a third tension cylinder is also movably engaged on the mounting plate, with the end of the third tension cylinder movably engaged with the inner wall of the third swing roller frame.

[0026] A further improvement is that the adhesive sealing tube includes a connecting frame with one end set on one side of the mounting plate and a sealing tube that is movably engaged with the other end of the connecting frame. An output roller is also movably engaged on the connecting frame, and an elastic element is provided between the side of the output roller and the side of the connecting frame.

[0027] A further improvement is that the bottom of the adhesive sealing device is also equipped with a viscous delivery pipe.

[0028] After adopting the above technical solution, the beneficial effects of this utility model are as follows: This utility model uses a cutter and a hot press head structure to seal and cut the edges of the express bag. It uses hot pressing instead of burning to bond the two layers of express bag film together, making the connection between them stronger and more stable. This prevents the edges from cracking due to pulling during use, resulting in higher strength and a smaller edge gap, thus improving the aesthetics.

[0029] This invention folds and rolls up the courier bag film and places it inside a film feeding machine. The film feeding machine then automatically feeds the courier bag film in for sealing and cutting. In conjunction with the first and second swing roller frames, the first and second swing roller frames swing to absorb excessive tensile force, thereby keeping the courier bag film conveying speed stable. This ensures that the size of the sealed and cut courier bags remains consistent, reducing the scrap rate.

[0030] This invention allows for the simultaneous cutting of express bags and the application of adhesive sealing devices to apply adhesive seals to the openings of the bags, eliminating the need for manual pasting after processing. This significantly improves the automation level of express bag processing. Furthermore, the third swing roller frame enhances the stability of the adhesive seal application, preventing it from being applied too quickly or too slowly and further reducing the scrap rate. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0032] Figure 1 This is a three-dimensional structural schematic diagram of the edge-sealing and cutting device of this utility model; Figure 2 This is a front view structural schematic diagram of the edge-sealing and cutting device of this utility model; Figure 3 This is a structural schematic diagram of the front view cross-section of the edge-sealing and cutting device of this utility model; Figure 4 This is a three-dimensional structural diagram of the edge-sealing and cutting machine of this utility model; Figure 5 This is a side view of the structure of the edge banding and cutting machine of this utility model; Figure 6 This is a schematic diagram of the front cross-section of the cutting structure of this utility model; Figure 7 This is a three-dimensional structural diagram of the adhesive sealing device of this utility model; Figure 8 This is a front view structural schematic diagram of the adhesive sealing device of this utility model; Figure 9 This is a rear view structural schematic diagram of the adhesive sealing device of this utility model. Detailed Implementation

[0033] The present invention will now be further described in conjunction with the accompanying drawings and specific embodiments.

[0034] See Figure 1-9As shown, the technical solution adopted in this specific embodiment is: a sealing and cutting device for express bags, including a base 1 and a film feeding machine 2 disposed on one side of the base 1 for feeding express bag film onto the base 1 for processing. The film feeding machine 2 includes a connecting block 21 disposed on one side of the base 1 and an inlet roller 25 disposed within the connecting block 21. The inner wall of the connecting block 21 near the base 1 is also provided with a plurality of vertically distributed fixed rollers 26. The inner wall of the connecting block 21 away from the base 1 is provided with a first swing roller frame 23. The connecting block 21 is provided with a first tension cylinder 24, one end of which is movably engaged with the inner wall of the connecting block 21. The other end of the first tension cylinder 24 is movably engaged with one side of the first swing roller frame 23. The base 1 includes a base body 11 and a film feeding machine 2 disposed on the side of the base body 11 near the base 11. The inner wall has a guide roller 12. The base body 11 is equipped with an edge sealing and cutting machine 8. The edge sealing and cutting machine 8 includes a crossbeam 81 on the base body 11 for fixing the entire device and a pressing cylinder 83 on the crossbeam 81 for providing downward pressure and absorbing reaction force. The lower end of the pressing cylinder 83 is equipped with a cutting structure 85 for cutting and heat-sealing express bags. The cutting structure 85 includes an electric heating block 851 at the lower end of the pressing cylinder 83 and a cutting blade 854 at the bottom of the electric heating block 851. A hot pressing head structure is integrally formed at the bottom of the electric heating block 851 on the side of the cutting blade 854. The hot pressing head structure includes a first hot pressing head 852 integrally formed at the bottom of the electric heating block 851 on the side of the cutting blade 854. The gap between the hot pressing head structure and the cutting blade 854 is 0.The 1mm-5mm diameter express bag is fed under the cutter 854. The pressing cylinder 83 presses down the heating block 851 and simultaneously presses down the cutter 854 and the hot press head structure, melting and cutting the express bag. In use, the folded express bag film is rolled up, and one end is pulled into the guide roller 25 of the film feeding machine 2. This causes the guide roller 25 to rotate, pulling the film out and winding it into the equipment. The film is then pulled to the first swing roller frame 23, and subsequently pulled out from the first swing roller frame 23 and wound onto the fixed roller 26, and then... The film is pulled into the first swing roller frame 23, whereby it reciprocates between the first swing roller frame 23 and the fixed roller 26, and can be pulled. The film is then pulled into the guide roller 12. If the tension of the guide roller 12 is too great, it can be transmitted to the express bag film, causing the first swing roller frame 23 to be pulled rapidly and swing. The tension is absorbed by the first tension cylinder 24, thereby keeping the tension on the express bag film within a certain range, stabilizing the transmission speed and preventing it from breaking. The roller 12 is guided into the base body 11 and sent to the position of the edge sealing and cutting machine 8. At this time, the downward pressure cylinder 83 of the edge sealing and cutting machine 8 generates downward pressure, which in turn presses the cutting structure 85 downward. At the same time, the heating block 851 is energized to generate heat, which causes the heating block 851 to move downward with the first hot pressing head 852 and the cutting blade 854, and press them onto the express bag film. The first hot pressing head 852 presses down on the express bag film, causing the express bag film to be heat-pressed and bonded together. At the same time, the cutting blade 854 presses down on the express bag film. The courier bag film is cut, and the 854 cutter can also be heated, further burning and bonding the cut edges during the cutting process to enhance the sealing strength. This results in a heat-sealed courier bag. The finished courier bag is then cut, and the two layers of courier bag film are bonded together through heat pressing rather than burning, making the connection stronger and more stable. This prevents the edges from cracking due to stretching during use, resulting in higher strength. The edge gap is only 0.1mm-5mm, which is short and aesthetically pleasing. The hot press head structure also includes a second hot press head 853 integrally formed on the bottom of the heating block 851 and located on the other side of the cutter 854. This facilitates simultaneous hot pressing of two express bag films from both sides, eliminating the need to feed the express bag in again for sealing the other side, thus increasing automation and processing efficiency. The gap between the first hot press head 852 and the cutter 854 is 0.1mm-3mm, which helps to further reduce the edge thickness, making the express bag smaller, more aesthetically pleasing, and more flexible in use; The gap between the second hot press head 853 and the cutter 854 is 0.1mm-3mm, which helps to further reduce the edge thickness, making the express bag smaller, more aesthetically pleasing, and more flexible in use; A fixing cylinder 87 is also provided on the side wall of the crossbeam 81. The bottom end of the fixing cylinder 87 is provided with a courier bag flattening frame 86, which is beneficial to press down during the sealing process to firmly press the courier bag onto the processing table, thereby avoiding the courier bag from moving and affecting the accuracy of cutting and sealing. Multiple fixing cylinders 87 and courier bag flattening frames 86 can be provided and simultaneously set on both sides of the crossbeam 81. When set on both sides of the crossbeam 81, a better pressing and fixing effect on the courier bag film can be obtained. The end of the crossbeam 81 is also provided with a lifting frame 82 that can raise and lower the crossbeam 81, which is conducive to driving the crossbeam 81 to move up and down, thereby accelerating the pressing speed, making the cutting more thorough and complete, and preventing adhesion. The crossbeam 2 is also provided with a limiting frame 3 for limiting the rising height of the cutter 54. The lower end of the limiting frame 3 is in contact with the upper surface of the cutter 54, which helps to prevent the cutter 854 from moving too high and being unable to extend out of the hot press head structure, thus ensuring the cutting effect on the express bag. The gap between the first hot press head 852 and the cutter 854 is 0.1mm-1.5mm, which helps to further reduce the edge thickness of the finished express bag; The gap between the first hot press head 852 and the cutter 854 is 0.1mm-1.5mm, which helps to further reduce the edge thickness of the finished express bag; The base body 11 is also provided with a straightening frame 6 for pulling the express bag film upward. The inner wall of the base body 11 between the straightening frame 6 and the edge sealing and cutting machine 8 is provided with a flattening roller 7. The flattening roller 7 is provided with an arc-shaped guide on the side near the straightening frame 6. After the express bag film is fed into the base body 11, it is pulled upward by the straightening frame 6 and then flattened again by the flattening roller 7 in conjunction with the arc-shaped guide before being fed in for edge sealing and cutting. This helps to make the surface of the fed film smoother and avoids wrinkles from affecting the edge sealing and cutting effect. The inner wall of the base body 11 is provided with a winding roller assembly 13 located between the guide roller 12 and the straightening frame 6. This allows the film to be repeatedly wound after being introduced into the base body 11, which helps to keep the express bag film in a straight and flat state, thus making the finished product after sealing and cutting better. The inner wall of the connecting block 21 is also movably engaged with a second swing roller frame 27 located above the fixed roller 26. A second tension cylinder 28 is movably engaged with one side of the second swing roller frame 27. The end of the second tension cylinder 28 away from the second swing roller frame 27 is movably engaged with the inner wall of the connecting block 21. Before the film is fed into the base 1, the film can be wound around the second swing roller frame 27 again, and the second tension cylinder 28 can further absorb the excessive tensile force, which helps to make the film conveying speed more stable and further reduce the damage caused by excessive tensile force to the express bag film. The top of the connecting block 21 is also equipped with a speed tester 22 for detecting the film transmission speed, which is beneficial for monitoring the speed at which the film of the express bag is pulled in. The other side of the base body 11 is provided with a finished product placement platform 0, which is conducive to placing finished products on the finished product placement platform 0, and can be used in conjunction with an external robotic arm to pick up and pull away the processed finished products. The upper surface of the base body 11 is provided with a pressing frame 9 at the corresponding position of the connection end of the finished product placement platform 0. This is beneficial for pressing down when sealing and cutting the edge. It not only enhances the fixing effect of the film during the sealing and cutting process to prevent slippage, but also can press the finished express bag after cutting, so that the finished express bag can be handled better in the future. The base body 11 is also provided with an adhesive sealing device 4. The adhesive sealing device 4 includes a mounting plate 41 fixedly connected to the base 1 and an adhesive sealing tube 42 disposed on one side of the mounting plate 41. The adhesive sealing tube 42 includes a connecting frame 421 disposed at one end on one side of the mounting plate 41 and a sealing tube 422 centrally engaged with the other end of the connecting frame 421. The connecting frame 421 is also movably engaged with an outlet roller 423. An elastic element is provided between the side of the outlet roller 423 and the side of the connecting frame 421. The mounting plate 41 is provided with a feeding roller 44 and a first drive motor 43 connected to the feeding roller 44 by a belt. The adhesive sealing tube 42 contains an adhesive seal. When in use, the adhesive seal is pulled out into the feeding roller 44, and the feeding roller 44 is driven to rotate by the first drive motor 42, thereby pulling out the adhesive seal and stretching it downwards so that it enters the base body 11 and adheres to the express bag film conveyed in the base body 11. The mounting plate 41 is also provided with a pull-out roller 46 and a second drive motor 45 connected to the pull-out roller 46 by a belt, which is beneficial to generate rotational pulling force through the second drive motor 45 at the same time, so that the pull-out roller 46 pulls the seal more smoothly. A plurality of guide rollers 49 are fixedly provided on the mounting plate 41. In this embodiment, six are provided. A third swing roller frame 47 is movably engaged on the mounting plate 41 below the guide rollers 49. A third tension cylinder 48 is also movably engaged on the mounting plate 41. The end of the third tension cylinder 48 is movably engaged with the inner wall of the third swing roller frame 47, so that the adhesive seal is pulled out and wrapped around the guide rollers 49 and the third swing roller 47. When the adhesive seal is pulled out by the pull-out roller 46, if an excessive pulling force is generated, the third swing roller 47 will swing and the third tension cylinder 48 will absorb the excessive pulling force, thereby making the adhesive seal pull-out speed more uniform and preventing the adhesive seal from being torn. The adhesive sealing device 4 is also equipped with a viscous delivery pipe 100 at the bottom, which facilitates the output of viscous liquid through the viscous delivery pipe 100 and allows the viscous seal to adhere to the viscous liquid when it passes by, thus eliminating the need to manually apply the viscous liquid to the express bag film and making the degree of automation higher.

[0035] The working principle of this utility model is as follows: When using this utility model, after the folded express bag film is rolled up, one end is pulled into the guide roller 25 of the film feeding machine 2. This causes the guide roller 25 to rotate, pulling the film out and into the equipment. The film is then pulled to the first swing roller frame 23, and subsequently pulled out from the first swing roller frame 23 and wound onto the fixed roller 26. It is then pulled back into the first swing roller frame 23, and this process repeats, causing the film to be wound between the first swing roller frame 23 and the fixed roller 26 and pulled. The film is then pulled into the guide roller 12. If the tension of the guide roller 12 is too large, it can be transmitted to the express bag film, causing the first swing roller frame 23 to be quickly pulled and swing. The tension is absorbed by the first tension cylinder 24, thus keeping the tension on the express bag film within a certain range, stabilizing the transmission speed and preventing breakage. The film is then guided by the guide roller 12 into the base body 11 and sent to the edge sealing and cutting machine 8. At this point, the pressing cylinder 83 of the edge-sealing and cutting machine 8 generates downward pressure, which in turn presses the cutting structure 85 downward. Simultaneously, the heating block 851 is energized to generate heat, causing it to move downward along with the first hot pressing head 852 and the cutter 854, pressing them onto the courier bag film. The first hot pressing head 852 presses down on the courier bag film, causing the film to be heat-pressed and bonded together. Simultaneously, the cutter 854 presses downward on the courier bag film, cutting it. The cutter 854 can also be heated, further burning and bonding the cut edge during the cutting process, further enhancing the sealing strength. This results in a heat-sealed courier bag, which is then cut. By using heat pressing rather than burning to bond the two layers of courier bag film together, the connection is made stronger and more stable, preventing edge cracking due to stretching during use. This results in higher strength, and the edge gap is only 0.1mm-5mm, which is shorter and more aesthetically pleasing. This utility model aims to protect the structure of the product. The model numbers of the components are not the focus of this utility model's protection, as they are common technology. Any component on the market that can achieve the functions described above can be used as an option. Therefore, the model numbers and other parameters of the components are not described in detail in this utility model. The contribution of this utility model lies in the scientific combination of the various components.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions provided are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection of this utility model as defined by the appended claims and their equivalents. Any aspects of this utility model not detailed herein are well-known to those skilled in the art.

Claims

1. A sealing and cutting device for express bags, comprising a base (1) and a film feeding machine (2) disposed on one side of the base (1) for feeding express bag film onto the base (1) for processing, the base (1) comprising a base body (11) and a guide roller (12) disposed on the inner wall of the base body (11) near the film feeding machine (2), the base body (11) being provided with a sealing and cutting machine (8), the sealing and cutting machine (8) comprising a crossbeam (81) disposed on the base body (11) for fixing the entire device and a pressing cylinder (83) disposed on the crossbeam (81) for providing downward pressure and absorbing reaction force, the lower end of the pressing cylinder (83) being provided with a cutting structure (85) for cutting and heat-sealing express bags, characterized in that: The cutting structure (85) includes an electric heating block (851) located at the lower end of the pressing cylinder (83) and a cutting blade (854) located at the bottom of the electric heating block (851). The bottom of the electric heating block (851) is integrally formed with a hot pressing head structure located on the side of the cutting blade (854). The gap between the hot pressing head structure and the cutting blade (854) is 0.1mm-5mm. When the express bag is fed into the cutting blade (854), the electric heating block (851) is pressed down by the pressing cylinder (83) and the cutting blade (854) and the hot pressing head structure are pressed down simultaneously to heat melt and cut the express bag.

2. The sealing and cutting device for express delivery bags according to claim 1, characterized in that: The hot press head structure includes a first hot press head (852) integrally formed on the bottom of the heating block (851) and located on one side of the cutter (854).

3. The sealing and cutting device for express delivery bags according to claim 2, characterized in that: The hot press head structure also includes a second hot press head (853) integrally formed on the bottom of the heating block (851) on the other side of the cutter (854).

4. The sealing and cutting device for express delivery bags according to claim 2, characterized in that: The gap between the first hot press head (852) and the cutter (854) is 0.1mm-3mm.

5. The sealing and cutting device for express delivery bags according to claim 3, characterized in that: The gap between the second hot press head (853) and the cutter (854) is 0.1mm-3mm.

6. The sealing and cutting device for express delivery bags according to claim 1, characterized in that: The side wall of the crossbeam (81) is also provided with a fixed cylinder (87), and the bottom end of the fixed cylinder (87) is provided with a flattening frame (86) for express bags.

7. A sealing and cutting device for express delivery bags according to claim 1 or 6, characterized in that: The end of the crossbeam (81) is also provided with a lifting frame (82) that allows the crossbeam (81) to rise and fall.

8. The sealing and cutting device for express delivery bags according to claim 1, characterized in that: The crossbeam (2) is also provided with a limiting frame (3) for limiting the rising height of the cutter (54), and the lower end of the limiting frame (3) is in contact with the upper surface of the cutter (54).

9. The sealing and cutting device for express delivery bags according to claim 4, characterized in that: The gap between the first hot press head (852) and the cutter (854) is 0.1mm-1.5mm.

10. A sealing and cutting device for express delivery bags according to claim 5, characterized in that: The gap between the first hot press head (852) and the cutter (854) is 0.1mm-1.5mm.

11. The sealing and cutting device for express delivery bags according to claim 1, characterized in that: The base body (11) is also provided with a straightening frame (6) for pulling the express bag film upward. The inner wall of the base body (11) between the straightening frame (6) and the edge sealing and cutting machine (8) is provided with a flattening roller (7). The flattening roller (7) is provided with an arc-shaped guide on the side near the straightening frame (6).

12. A sealing and cutting device for express delivery bags according to claim 1 or 11, characterized in that: The base body (11) has a winding roller assembly (13) located on the inner wall between the guide roller (12) and the straightening frame (6).

13. A sealing and cutting device for express delivery bags according to claim 1 or 11, characterized in that: The film feeding machine (2) includes a connecting block (21) disposed on one side of the base (1) and an inlet roller (25) disposed in the connecting block (21). The connecting block (21) is also provided with a number of vertically distributed fixed rollers (26) on the inner wall near the base (1). The connecting block (21) is provided with a first swing roller frame (23) on the inner wall away from the base (1). The connecting block (21) is provided with a first tension cylinder (24) with one end movably engaged with the inner wall of the connecting block (21). The other end of the first tension cylinder (24) is movably engaged with one side of the first swing roller frame (23).

14. The sealing and cutting device for express delivery bags according to claim 13, characterized in that: The inner wall of the connecting block (21) is also movably engaged with a second swing roller frame (27) located above the fixed roller (26). A second tension cylinder (28) is movably engaged on one side of the second swing roller frame (27). The end of the second tension cylinder (28) away from the second swing roller frame (27) is movably engaged with the inner wall of the connecting block (21).

15. A sealing and cutting device for express delivery bags according to claim 13, characterized in that: The top of the connecting block (21) is also equipped with a speed tester (22) for detecting the membrane transmission speed.

16. The sealing and cutting device for express delivery bags according to claim 1, characterized in that: The base body (11) has a finished product placement platform (0) on the other side.

17. A sealing and cutting device for express delivery bags according to claim 16, characterized in that: The upper surface of the base body (11) is provided with a compaction frame (9) at the corresponding position of the connection end of the finished product placement platform (0).

18. The sealing and cutting device for express delivery bags according to claim 1, characterized in that: The base body (11) is also provided with an adhesive sealing device (4). The adhesive sealing device (4) includes a mounting plate (41) fixedly connected to the base (1) and an adhesive sealing strip tube (42) disposed on one side of the mounting plate (41). The mounting plate (41) is provided with a feeding roller (44) and a first drive motor (43) connected to the feeding roller (44) by a belt.

19. A sealing and cutting device for express delivery bags according to claim 18, characterized in that: The mounting plate (41) is also provided with a pull-out roller (46) and a second drive motor (45) connected to the pull-out roller (46) by a belt.

20. A sealing and cutting device for express delivery bags according to claim 18, characterized in that: A plurality of guide rollers (49) are fixedly provided on the mounting plate (41). A third swing roller frame (47) is movably engaged on the mounting plate (41) below the guide rollers (49). A third tension cylinder (48) is also movably engaged on the mounting plate (41). The end of the third tension cylinder (48) is movably engaged with the inner wall of the third swing roller frame (47).

21. A sealing and cutting device for express delivery bags according to claim 18, characterized in that: The adhesive sealing tube (42) includes a connecting frame (421) with one end set on one side of the mounting plate (41) and a sealing tube (422) that is movably engaged with the other end of the connecting frame (421). A guide roller (423) is also movably engaged on the connecting frame (421). An elastic element is provided between the side of the guide roller (423) and the side of the connecting frame (421).

22. The sealing and cutting device for express delivery bags according to claim 18, characterized in that: The bottom of the adhesive sealing device (4) is also provided with a viscous delivery pipe (100).

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