A heat-sealing mechanism for tobacco logistics

Abstract

This utility model discloses a hot-film sealing mechanism for tobacco logistics, belonging to the field of film sealing packaging technology. It includes a film feeding machine, a wrapping and sealing machine, and a transfer tobacco stack machine disposed between the two. The film feeding machine is equipped with an ejection mechanism. The wrapping and sealing machine includes a frame and an upper film feeding roller group, a lower film feeding roller group, and a sealing and cutting mechanism disposed thereon. The film feeding machine feeds packaging film from its upper and lower ends, which then passes around the upper and lower film feeding roller groups and is sealed by the sealing and cutting mechanism. It also includes counterweight components. The upper and lower film feeding roller groups are each equipped with a counterweight component, which includes a counterweight roller. The packaging film passing through the upper and lower film feeding roller groups wraps around the lower side of the corresponding counterweight roller and supports it. Under the action of the counterweight rollers, this utility model pre-tightens the film during the tobacco pushing process. When the tobacco stack is pressed to the sealing and cutting position by the pressure plate, the film pulls back, making the tobacco pack tighter, resulting in higher packaging efficiency and saving film material.

Description

Technical Field

[0001] This utility model relates to a sealing mechanism, and more particularly to a heat-sealing mechanism for tobacco logistics, belonging to the field of film sealing packaging technology. Background Technology

[0002] After the tobacco is processed into the shape commonly used for smoking, the processed cigarettes need to be packaged into small boxes, and a certain number of boxes are then packed into a carton. After the cigarette packs are packaged into cartons, they are transported in two ways. One method is to pack the cartons into cigarette boxes and transport the boxes directly; the other method is to stack the cartons together and wrap them in film to facilitate later transportation, while also providing sealing, moisture protection, and pollution prevention.

[0003] Traditionally, the wrapping of cigarette packs involves a combination of manual and mechanical processes. A stacking mechanism piles several packs of cigarettes, which are then manually transferred to a horizontal wrapping mechanism for horizontal wrapping. This horizontally wrapped cigarettes are then manually transferred to a vertical wrapping mechanism for vertical wrapping. However, manual wrapping of cigarette packs is extremely inefficient, and the wrapping process often results in wrinkles and uneven distribution of the film, leading to significant film waste, increased production costs, increased workload for operators, and wasted human resources. Therefore, fully automated cigarette pack wrapping devices have emerged, which can complete the entire process of stacking, wrapping, and unloading cigarette packs.

[0004] However, in actual use, some problems have been found with existing cigarette pack wrapping and sealing equipment. For example, when the cigarette pack is pushed out of the packaging, the cigarettes tend to lurch forward due to inertia, and the heat-sealed packaging cannot be made very close to the cigarettes, resulting in the wrapped cigarette pack not being tightly packed. Figure 15 As shown. Another example is the existing hot-film sealing and cutting knife on the upper part of the packaging equipment. Its constant movement causes instability in the wiring of the high-power heating element. Furthermore, the hot-film sealing and cutting stroke is long; the wrapping process involves pushing the smoke into the wrapping film – the pressing plate holding the smoke in place for a delay to ensure stability (so the pushing plate can retract) – and then the sealing and cutting knife descends to seal and cut, affecting packaging efficiency. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides a hot film sealing mechanism for tobacco logistics.

[0006] The technical solution adopted in this utility model is as follows: a hot film sealing mechanism for tobacco logistics is designed, including a film feeding machine, a film wrapping and sealing machine and a transfer tobacco stacking machine set between the two. The film feeding machine is equipped with a push-out mechanism. During sealing, multiple packs of tobacco are stacked into a stack and placed on the transfer tobacco stacking machine. Then the push-out mechanism pushes the tobacco stack into the film wrapping and sealing machine to complete the hot film sealing operation. The wrapping and sealing machine includes a frame and an upper film-feeding roller group, a lower film-feeding roller group, and a sealing and cutting mechanism mounted on it. In the initial state, the upper and lower ends of the film-feeding machine respectively release packaging film, which passes around the upper and lower film-feeding roller groups and is then sealed by the sealing and cutting mechanism. When sealing begins, the tobacco packs are pushed into the wrapping and sealing machine. The packaging film passes around the upper and lower film-feeding roller groups and is released and wrapped around the tobacco packs. It is then heat-sealed by the sealing and cutting mechanism and cut at the heat-sealed point. (It should be noted that the cutting separates the film wrapped around the tobacco packs from the film released by the film-feeding machine, but the packaging films released by the upper and lower ends of the film-feeding machine are still connected. Specifically, the heat-sealing point is between the packaging film wrapped around the tobacco packs and the closed-loop film formed by the connection of the films from the upper and lower ends of the film-feeding machine. Therefore, the films from the upper and lower ends of the film-feeding machine are still connected after the cutting.)

[0007] This design also includes counterweight components. Counterweight components are respectively installed on the upper and lower film-laying roller groups. Each counterweight component includes a counterweight roller and guide plates located at both ends of the counterweight roller. Guide tracks are provided on the guide plates. The ends of the counterweight rollers are inserted into the guide tracks and can slide up and down. The packaging film passing through the upper and lower film-laying roller groups wraps around the underside of the corresponding counterweight roller and supports it. Through this structure, under the action of the counterweight rod, the film is pre-tightened during the cigarette pushing process by the ejection mechanism. When the cigarette pack is pressed to the sealing position by the pressure plate, the film pulls back, making the cigarette pack tighter. Specifically, during use, the counterweight roller can move freely up and down, applying its own weight to the packaging film. The counterweight roller maintains a certain tension in the packaging film, preventing it from becoming loose. Maintaining a certain tension in the packaging film better ensures the tightness of the packaging.

[0008] Furthermore, the sealing and cutting mechanism includes a fixed blade assembly, a pressing assembly, and a supporting assembly. The pressing assembly includes a liftable pressure plate and a moving blade assembly mounted on the pressure plate. The supporting assembly includes a liftable supporting platform. The fixed blade assembly is mounted on the frame on one side of the transfer tobacco stacker. After the moving blade assembly descends to the fixed blade assembly, the two work together to seal and cut the packaging film. In use, the tobacco stack is pushed onto the supporting platform by the push-out mechanism. Then, the pressure plate descends to the top of the tobacco stack and continues to descend, pressing down on the tobacco stack and the supporting platform. During this process, the packaging film on the tobacco stack is further tightened until the moving blade assembly and the fixed blade assembly are aligned. Then, the push-out mechanism retracts to await the next operation. At the same time, the moving blade assembly and the fixed blade assembly start sealing and cutting. After sealing and cutting is completed, the pressure plate, the wrapped tobacco stack, and the supporting platform rise to the upper limit origin. Then, the tobacco stack is sent to the shrinking process.

[0009] Furthermore, the moving blade assembly includes a retractable film-pressing seat and two pressure strips disposed on the film-pressing seat. A retractable cutter is disposed on the film-pressing seat between the two pressure strips. The fixed blade assembly includes a heat-sealing seat and a heating element disposed on the heat-sealing seat. Two rows of heating wires are disposed on the heat-sealing seat, and a cutting groove is disposed on the heat-sealing seat between the two rows of heating wires. After the moving blade assembly and the fixed blade assembly are aligned, the two pressure strips and the two rows of heating wires cooperate to perform two-way heat sealing on the packaging film. After heat sealing, the cutter extends into the cutting groove to cut between the two heat seals, completing the sealing and cutting process (sealing and cutting).

[0010] Furthermore, the moving blade assembly also includes a pressing and telescopic assembly and a cutting and telescopic assembly, both of which are controlled by cylinders for extension and retraction. The pressing and telescopic assembly has the film pressing seat at its telescopic end, and the cutting and telescopic assembly has the cutting blade at its telescopic end. After the moving blade assembly is aligned with the fixed blade assembly, the two pressure strips and the two rows of heating wires are aligned respectively. Then, the telescopic end of the pressing and telescopic assembly drives the film pressing seat to move until the pressure strips and heating wires clamp the two layers of packaging film between them and heat seal them. Then, the telescopic end of the cutting and telescopic assembly drives the cutting blade to insert into the blade groove to complete the cutting.

[0011] Furthermore, the pressing assembly also includes a push plate and a pressing drive assembly. The pressure plate is disposed at the lower end of the push plate, and a pressing slider is installed on the push plate. A pressing slide rail is installed on the frame, and the two are slidably connected. That is, the push plate is slidably disposed on the frame. The output end of the pressing drive assembly drives the push plate to rise and fall, and the rising and falling of the push plate drives the rising and falling of the pressure plate.

[0012] Furthermore, the downward drive assembly includes a downward drive motor, a reducer, a drive shaft, a driven shaft, a transmission chain, a transmission sprocket, and a downward connecting member. The reducer is mounted on the frame, and the downward drive motor is mounted on the reducer. The output end of the reducer is connected to the drive shaft. The drive shaft and the driven shaft are rotatably mounted on the frame and are parallel to each other. Transmission sprockets are respectively mounted at both ends of the drive shaft and the driven shaft. The transmission sprockets on the same side of the two shafts are connected by a transmission chain. The push plate and the transmission chain are connected by the downward connecting member. The above structure enables the pressure plate and the moving knife assembly on it to rise and fall stably.

[0013] Furthermore, the load-bearing assembly also includes a crossbeam, support legs, a load-bearing cylinder, an upper fixing component, and a lower fixing component. The load-bearing platform is mounted on the crossbeam. Support legs are respectively provided at both ends of the crossbeam and slidably connected to them. The support legs are mounted on the frame. The load-bearing cylinder is provided between the two support legs. The upper end of the load-bearing cylinder is fixed to the support leg by the upper fixing component, and the lower end is fixed to the frame by the lower fixing component. The output end of the load-bearing cylinder is connected to the crossbeam, and the load-bearing cylinder drives the load-bearing platform to rise and fall.

[0014] Furthermore, the load-bearing assembly also includes a load-bearing slide rail and a load-bearing slider. The load-bearing slide rail is respectively provided at both ends of the crossbeam, and the load-bearing slider is provided on the support leg. The load-bearing slide rail and the load-bearing slider are slidably connected. The bottom of the support leg is provided with a clearance opening. When the load-bearing platform moves up and down, the load-bearing slide rail on it can pass through the clearance opening to avoid interference.

[0015] Furthermore, the supporting platform includes a support plate, a conveyor belt assembly, a support plate, and a support shaft. Support plates are respectively installed at both ends of the crossbeam, and the conveyor belt assembly is positioned between the two support plates to support it. The conveyor belt assembly includes an electric roller, a driven roller, a conveyor belt, and a limiting driven roller. The electric roller and the driven roller are arranged parallel to each other between the two support plates, and the conveyor belt is positioned between them. The electric roller is electrically connected to an external source and can rotate to drive the conveyor belt to deliver the sealed tobacco stacks. The support plate is located on the lower side of the upper layer of the conveyor belt, and the support shaft is located on the lower side of the support plate. The support plate and the support shaft are respectively fixed to the support plate to improve the support capacity of the upper layer of the conveyor belt. The limiting driven roller is located on the lower side of the lower layer of the conveyor belt to constrain the movement trajectory of the conveyor belt.

[0016] Furthermore, the upper film-feeding roller assembly is also equipped with a film-feeding component, which includes a film-feeding motor, an active film-feeding roller, and a driven film-feeding roller. The film-feeding motor is connected to the active film-feeding roller, and the active film-feeding roller and the driven film-feeding roller are arranged in parallel. When the cigarette pack stack contains only 1-3 packs of cigarettes, during the process of the pushing mechanism pushing the cigarette pack into the wrapping and sealing machine, the film-feeding component will simultaneously start to match the pushing speed to avoid the cigarettes being pulled backward by the packaging film during the pushing process, causing damage to the cigarettes.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] (1) In this utility model, counterweight components are set on the upper film roller group and the lower film roller group respectively. When sealing the film, the film is pre-tightened during the process of pushing the cigarette under the action of the counterweight roller. Furthermore, the cigarette pack will be pulled back by the film (or have a pulling force) during the process of the pressure plate pressing the cigarette pack to the sealing and cutting position, making the cigarette pack tighter.

[0019] (2) Since the principle of this utility model is a downward sealing and cutting, the push-out mechanism only needs to push the cigarette pack stack to the surface that can be pressed down, without having to push it further forward as in existing sealing and cutting (to prevent the cigarette pack from being pulled back by the film during the sealing and cutting process, thus damaging the sealing and cutting). This can save film and materials.

[0020] (3) The moving blade assembly (or cutter) is integrated with the pressure plate, resulting in a shorter sealing and cutting stroke and higher efficiency.

[0021] (4) The hot knife (or the heating element of the fixed knife assembly) is fixed at the bottom, which can completely avoid the loosening of the wire due to repeated up and down movement.

[0022] This invention makes the cigarette packs more compact and uniform after packaging, simplifies the packaging process, and improves the working efficiency of the packaging machine. Attached Figure Description

[0023] 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.

[0024] Figure 1 This is a schematic diagram of the stacking of tobacco piles on the transfer stacking machine according to this utility model.

[0025] Figure 2 This is a schematic diagram of the present invention's ejection mechanism pushing the tobacco stack into the wrapping and sealing machine.

[0026] Figure 3This is a schematic diagram of the pressing component of this utility model pressing the tobacco stack into the sealing position.

[0027] Figure 4 This is a schematic diagram showing the bearing platform rising to its upper limit origin after the tobacco stack is sealed and cut according to this utility model.

[0028] Figure 5 for Figure 3 Enlarged view of part A.

[0029] Figure 6 This is a schematic diagram of the film-feeding roller assembly of this utility model.

[0030] Figure 7 This is a schematic diagram of the lowering film roller assembly of this utility model.

[0031] Figure 8 Isometric view of the pressing component of this utility model Figure 1 Schematic diagram.

[0032] Figure 9 Isometric view of the pressure component of this utility model Figure 2 Schematic diagram.

[0033] Figure 10 The isometric assembly of the pressure plate and moving knife assembly of this utility model is shown. Figure 1 Schematic diagram.

[0034] Figure 11 The isometric assembly of the pressure plate and moving knife assembly of this utility model is shown. Figure 2 Schematic diagram.

[0035] Figure 12 This is a schematic diagram of the load-bearing component of this utility model.

[0036] Figure 13 for Figure 12 A schematic diagram showing the concealed beam.

[0037] Figure 14 This is a schematic cross-sectional view of the support platform of this utility model.

[0038] Figure 15 This is a schematic diagram of existing technology for sealing tobacco stacks.

[0039] In the diagram: 1. Film feeding machine; 2. Film wrapping and sealing machine; 3. Transfer stacker; 4. Pushing mechanism; 5. Frame; 6. Upper film feeding roller assembly; 7. Lower film feeding roller assembly; 8. Counterweight assembly; 9. Counterweight roller; 10. Guide plate; 11. Fixed knife assembly; 12. Pressing assembly; 13. Bearing assembly; 14. Pressure plate; 15. Moving knife assembly; 16. Bearing platform; 17. Film pressing seat; 18. Pressing strip; 19. Cutter; 20. Heat sealing seat; 21. Heating element; 22. Heating wire; 23. Knife groove; 24. Pressing telescopic assembly; 25. Cutting telescopic assembly; 26. Push plate; 27. Pressing slider; 28. Pressing slide rail; 29. ​​Pressing drive motor; 30. Reducer; 31. Drive shaft; 2. Driven shaft; 33. Drive chain; 34. Drive sprocket; 35. Lower pressure connector; 36. Crossbeam; 37. Support leg; 38. Bearing cylinder; 39. Upper fixing part; 40. Lower fixing part; 41. Bearing slide rail; 42. Bearing slider; 43. Clearance opening; 44. Support plate; 45. Conveyor belt assembly; 46. Bearing plate; 47. Bearing shaft; 48. Electric roller; 49. Driven roller; 50. Conveyor belt; 51. Limiting roller; 52. Clamping film assembly; 53. Clamping motor; 54. Active film feeding roller; 55. Driven film feeding roller; 56. Clamping film cylinder; 57. Drive belt; 58. Currently used film cylinder; 59. Spare film cylinder; 60. Packaging film. Detailed Implementation

[0040] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0041] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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.

[0042] Example 1

[0043] like Figure 1As shown, a tobacco logistics sealing and heat-sealing mechanism includes a film feeding machine 1, a wrapping and sealing machine 2, and a tobacco stack transfer machine 3 disposed between the two. The film feeding machine 1 is equipped with a pushing mechanism 4, which is typically composed of a cylinder and a push plate 26, used to push out the tobacco stacks. The wrapping and sealing machine 2 includes a frame 5 and an upper film feeding roller group 6, a lower film feeding roller group 7, and a sealing and cutting mechanism disposed thereon. The film feeding machine 1 feeds out packaging film 60 from its upper and lower ends, which then pass over the upper film feeding roller group 6 and the lower film feeding roller group 7 respectively before being sealed together by the sealing and cutting mechanism. It can be understood that the film feeding machine 1 includes at least two sets of film feeding rollers to feed out packaging film 60 simultaneously. For example, in this embodiment, the film feeding machine 1 is assembled from two automatic film splicing machines, which can be the automatic film splicing machine structure provided by patent ZL202220234586.8. The automatic film splicing machine typically includes a currently used film tube 58 and a spare film tube 59, and generally also includes a demolding mechanism, etc. Existing technologies can be used, so they will not be described in detail here.

[0044] The pressure-sealing heat-sealing mechanism provided in this embodiment also includes a counterweight assembly 8. The upper film-laying roller group 6 and the lower film-laying roller group 7 are respectively equipped with counterweight assemblies 8, such as... Figure 6-7 As shown, the counterweight assembly 8 includes a counterweight roller 9 and guide plates 10 respectively disposed at both ends of the counterweight roller 9. The guide plates 10 are provided with guide slides. The end of the counterweight roller 9 is inserted into the guide slide and can slide up and down. The packaging film 60 passing through the upper film-laying roller group 6 and the lower film-laying roller group 7 is wrapped around the lower side of the corresponding counterweight roller 9 and supports the counterweight roller 9. During the film-laying process, the counterweight roller 9 applies its own gravity to the packaging film 60 passing through it to provide a certain tensioning effect.

[0045] More specifically, the upper film-feeding roller group 6 is also equipped with a clamping film assembly 52 (which can be a conventional existing clamping film structure to clamp and feed the packaging film 60). The clamping film assembly 52 includes a clamping motor 53, an active film-feeding roller 54, and a driven film-feeding roller 55. The clamping motor 53 is connected to the active film-feeding roller 54. The active film-feeding roller 54 and the driven film-feeding roller 55 are arranged in parallel. When the number of cigarette packs in the stack is small, such as 1-3 packs, the clamping motor 53 is started, so that the active film-feeding roller 54 works to drive the packaging film 60 out of the pack, thus avoiding damage to the cigarettes. It should be noted that, in order to enable the film feeding assembly 52 to actively engage and disengage from the film feeding operation, the active film feeding roller 54 is generally configured as an adjustable structure, so that the distance between it and the driven film feeding roller 55 is adjustable, thereby realizing active engagement and disengagement of the film feeding operation. For example, film feeding cylinders 56 can be set at both ends of the active film feeding roller 54, so that the distance between it and the driven film feeding roller 55 can be adjusted by the cylinders. The clamping motor 53 and the active film feeding roller 54 can be driven by a transmission belt 57.

[0046] Example 2

[0047] This embodiment is a further optimization of the sealing and cutting mechanism structure based on Embodiment 1. In this embodiment, the sealing and cutting mechanism includes a fixed blade assembly 11, a pressing assembly 12, and a supporting assembly 13, as follows: Figure 8-11 As shown, the pressing assembly 12 includes a liftable pressure plate 14 and a moving blade assembly 15 disposed on the pressure plate 14, such as... Figure 12-14 As shown, the carrying component 13 includes a liftable carrying platform 16, and the fixed blade component 11 is installed on the frame 5 on one side of the transfer tobacco stacker 3. After the moving blade component 15 descends to the fixed blade component 11, the two cooperate to seal and cut the packaging film 60. After the stack of cigarette packs is pushed onto the carrying platform 16, the packaging film 60 covers its upper, lower, and left sides. The pressure plate 14, which carries the moving knife assembly 15, presses the stack of cigarette packs downwards into the sealing and cutting position. At this time, the packaging film 60 further covers the right side of the stack of cigarette packs. The packaging film 60 on the right side of the stack (which can be understood as the packaging film 60 released from the lower end of the film feeding machine 1) passes through the gap between the moving knife assembly 15 and the fixed knife assembly 11. The packaging film 60 on the upper side of the stack (which can be understood as the packaging film 60 released from the upper end of the film feeding machine 1) also passes through the gap between the moving knife assembly 15 and the fixed knife assembly 11. The two are heat-sealed together at the gap between the moving knife assembly 15 and the fixed knife assembly 11 and then cut in the middle. This achieves the heat sealing of the packaging film 60 released from both ends of the film feeding machine 1 and the cutting between the packaging film 60 on the stack of cigarette packs and the packaging film 60 on the film feeding machine 1. Figure 5 As shown.

[0048] More specifically, the moving blade assembly 15 includes a film pressing seat 17 and two pressing strips 18 disposed on the film pressing seat 17. A retractable cutter 19 is disposed on the film pressing seat 17 between the two pressing strips 18. Specifically, the film pressing seat 17 has an opening in the middle, and the cutter 19 can move in and out of the opening. The fixed blade assembly 11 includes a heat sealing seat 20 and a heating element 21 disposed on the heat sealing seat 20. The heat sealing seat 20 is provided with two rows of heating wires 22, and a blade groove 23 is provided on the heat sealing seat 20 between the two rows of heating wires 22. During heat sealing, the heating element 21 heats up instantly and transfers the heat to the heating wires 22, which then heat seal the packaging film 60. More specifically, the moving blade assembly 15 also includes a pressing telescopic assembly 24 and a cutting telescopic assembly 25, both of which are controlled by a moving blade cylinder (i.e., a cylinder assembly). The pressing telescopic assembly 24 has the film pressing seat 17 at its telescopic end, and the cutting telescopic assembly 25 has the cutter 19 at its telescopic end. The specific connection structure can be achieved using conventional techniques, such as a simple rod connection. The two pressure strips 18 of the film pressing seat 17 press the two layers of packaging film 60 onto the two rows of heating wires 22 and heat-seal them, and then the cutter 19 cuts them in the middle.

[0049] Example 3

[0050] This embodiment is a further optimization of the structure of the pressing component 12 based on embodiment 2. In this embodiment, the pressing component 12 also includes a push plate 26 and a pressing drive component. The pressure plate 14 is disposed at the lower end of the push plate 26, and a pressing slider 27 is installed on the push plate 26. A pressing slide rail 28 is installed on the frame 5, and the two are slidably connected. The output end of the pressing drive component drives the push plate 26 to rise and fall. For example, the downward drive assembly includes a downward drive motor 29, a reducer 30, a drive shaft 31, a driven shaft 32, a transmission chain 33, a transmission sprocket 34, and a downward connecting member 35. The reducer 30 is mounted on the frame 5, and the downward drive motor 29 is mounted on the reducer 30. The output end of the reducer 30 is connected to the drive shaft 31. The drive shaft 31 and the driven shaft 32 are rotatably mounted on the frame 5 and are parallel to each other. Transmission sprockets 34 are respectively provided at both ends of the drive shaft 31 and the driven shaft 32. The transmission sprockets 34 on the same side of the two shafts are connected by the transmission chain 33. The push plate 26 and the transmission chain 33 are connected by the downward connecting member 35. Specifically, downward connecting members 35 are provided on both sides of the push plate 26 to connect the corresponding positions of the transmission chain 33. The lifting and lowering of the push plate 26 can also be achieved by gear and rack transmission or lead screw transmission, etc.

[0051] Example 4

[0052] This embodiment is a further optimization of the structure of the bearing component 13 based on embodiment 3. In this embodiment, the bearing component 13 also includes a crossbeam 36, support legs 37, a bearing cylinder 38, an upper fixing member 39, and a lower fixing member 40. The bearing platform 16 is mounted on the crossbeam 36. The support legs 37 are respectively provided at both ends of the crossbeam 36 and slidably connected to them, that is, the crossbeam 36 can slide up and down along the connection between it and the support legs 37. The support legs 37 are mounted on the frame 5, specifically on the base plate at the lower end of the frame 5. The bearing cylinder 38 is provided between the two support legs 37. The upper end of the bearing cylinder 38 is fixed to the support leg 37 by the upper fixing member 39, and the lower end is fixed to the base plate at the lower end of the frame 5 by the lower fixing member 40. The output end of the bearing cylinder 38 is connected to the crossbeam 36, specifically through a right-angle plate, thereby driving the crossbeam 36 to rise and fall.

[0053] The specific structure of the sliding connection between the crossbeam 36 and the support leg 37 can be as follows: the bearing assembly 13 further includes a bearing slide rail 41 and a bearing slider 42. The bearing slide rail 41 is respectively provided at both ends of the crossbeam 36, and the bearing slider 42 is fixedly provided on the support leg 37. The bearing slide rail 41 and the bearing slider 42 are slidably connected. The bottom of the support leg 37 is provided with a clearance opening 43 for the bearing slide rail 41 to pass through.

[0054] In this embodiment, the carrying platform 16 includes a support plate 44, a conveyor belt assembly 45, a carrying plate 46, and a carrying shaft 47. The support plates 44 are respectively arranged at both ends of the crossbeam 36, and the conveyor belt assembly 45 is arranged between the two support plates 44. The conveyor belt assembly 45 includes an electric roller 48, a driven roller 49, a conveyor belt 50, and a limiting driven roller 51. The electric roller 48 and the driven roller 49 are arranged in parallel between the two support plates 44. The conveyor belt 50 is arranged between the electric roller 48 and the driven roller 49. The carrying plate 46 is arranged on the lower side of the upper layer of the conveyor belt 50, and the carrying shaft 47 is arranged on the lower side of the carrying plate 46. The carrying plate 46 and the carrying shaft 47 are respectively fixed on the support plate 44. The limiting driven roller 51 is arranged on the lower side of the lower layer of the conveyor belt 50.

[0055] The working process for this application is as follows:

[0056] S1: The stack of tobacco to be wrapped enters the wrapping state on the transfer stack machine 3 directly opposite the ejection mechanism 4, such as... Figure 1 As shown;

[0057] S2: The pushing mechanism 4 pushes the stack of cigarettes to be wrapped directly onto the carrying platform 16 of the wrapping and sealing machine 2. At this time, the upper and lower counterweight rollers 9 pre-tighten the cigarette packs. When there are only 1-3 cigarette packs, the clamping film assembly 52 will start simultaneously during the pushing process to match the pushing speed and prevent the cigarette packs from being pulled backward by the film during the pushing process, causing damage to the cigarettes. Figure 2 As shown;

[0058] S3: The pressure plate 14 (with cold cutting and sealing) presses down until it hits the tobacco stack, then it is pressed down together with the conveyor belt assembly 45 with a cylinder. During this process, the packaging film 60 will pull back, causing the tobacco pack to be tightly wrapped. Figure 3 As shown; when the moving blade assembly 15 is aligned with the fixed blade assembly 11, the ejection mechanism 4 can retract to allow the next pack of tobacco to enter, and the sealing and cutting process starts simultaneously. After sealing and cutting is completed, the pressure plate 14, the wrapped tobacco pack, and the conveyor belt assembly 45 with cylinders rise to the upper limit origin, as shown. Figure 4 As shown, the conveyor belt assembly 45 starts to send the tobacco stack to the shrinkage process;

[0059] S4: After the next wrapped tobacco stack comes in, the process of pushing out, sealing, and sending it away is restarted again, and the cycle repeats.

[0060] The specific embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A heat-sealing mechanism for tobacco logistics, comprising a film feeding machine (1), a wrapping and sealing machine (2), and a transfer tobacco stacker (3) disposed between the two, wherein the film feeding machine (1) is provided with an ejection mechanism (4); the wrapping and sealing machine (2) comprises a frame (5) and an upper film feeding roller group (6), a lower film feeding roller group (7), and a sealing and cutting mechanism disposed thereon, wherein the film feeding machine (1) feeds out packaging film (60) from its upper and lower ends respectively, and after passing over the upper film feeding roller group (6) and the lower film feeding roller group (7) respectively, it is sealed by the sealing and cutting mechanism, characterized in that: It also includes a counterweight assembly (8). The upper film roller group (6) and the lower film roller group (7) are respectively provided with a counterweight assembly (8). The counterweight assembly (8) includes a counterweight roller (9) and guide plates (10) respectively provided at both ends of the counterweight roller (9). The guide plate (10) is provided with a guide slide. The end of the counterweight roller (9) is inserted into the guide slide and can slide up and down. The packaging film (60) passing through the upper film roller group (6) and the lower film roller group (7) is respectively wrapped around the lower side of the corresponding counterweight roller (9) and supports the counterweight roller (9). The sealing and cutting mechanism includes a fixed blade assembly (11), a pressing assembly (12), and a carrying assembly (13). The pressing assembly (12) includes a liftable pressure plate (14) and a moving blade assembly (15) disposed on the pressure plate (14). The carrying assembly (13) includes a liftable carrying platform (16). The fixed blade assembly (11) is disposed on the frame (5) on one side of the transfer stacker (3). After the moving blade assembly (15) descends to the fixed blade assembly (11), the two work together to seal and cut the packaging film (60).

2. A heat shrink film sealing mechanism for tobacco stream sealing according to claim 1, wherein: The moving blade assembly (15) includes a pressure plate seat (17) and two pressure strips (18) disposed on the pressure plate seat (17). A retractable cutter (19) is disposed on the pressure plate seat (17) between the two pressure strips (18). The fixed blade assembly (11) includes a heat sealing seat (20) and a heating tube (21) disposed on the heat sealing seat (20). Two rows of heating wires (22) are disposed on the heat sealing seat (20). A blade groove (23) is disposed on the heat sealing seat (20) between the two rows of heating wires (22).

3. A heat shrink film sealing mechanism for tobacco stream sealing according to claim 2, wherein: The moving blade assembly (15) also includes a pressing telescopic assembly (24) and a cutting telescopic assembly (25), both of which are controlled by cylinders for telescopic movement. The pressing telescopic assembly (24) has the pressing film seat (17) at its telescopic end, and the cutting telescopic assembly (25) has the cutting blade (19) at its telescopic end.

4. The tobacco logistics compression sealing and heat-sealing mechanism according to claim 1, characterized in that: The pressing assembly (12) further includes a push plate (26) and a pressing drive assembly. The pressure plate (14) is provided at the lower end of the push plate (26). A pressing slider (27) is installed on the push plate (26). A pressing slide rail (28) is installed on the frame (5). The two are slidably connected. The output end of the pressing drive assembly drives the push plate (26) to rise and fall.

5. The tobacco logistics compression sealing heat film packaging mechanism according to claim 4, characterized in that: The pressing drive assembly includes a pressing drive motor (29), a reducer (30), a drive shaft (31), a driven shaft (32), a transmission chain (33), a transmission sprocket (34), and a pressing connector (35). The reducer (30) is mounted on the frame (5), and the pressing drive motor (29) is mounted on the reducer (30). The output end of the reducer (30) is connected to the drive shaft (31). The drive shaft (31) and the driven shaft (32) are rotatably mounted on the frame (5) and are parallel to each other. The two ends of the drive shaft (31) and the driven shaft (32) are respectively provided with transmission sprockets (34). The transmission sprockets (34) on the same side of the two are connected by the transmission chain (33). The push plate (26) and the transmission chain (33) are connected by the pressing connector (35).

6. The tobacco logistics compression sealing heat film sealing mechanism according to any one of claims 1-5, characterized in that: The load-bearing assembly (13) also includes a crossbeam (36), support legs (37), a load-bearing cylinder (38), an upper fixing member (39), and a lower fixing member (40). The load-bearing platform (16) is installed on the crossbeam (36). The support legs (37) are respectively provided at both ends of the crossbeam (36) and are slidably connected to it. The support legs (37) are installed on the frame (5). The load-bearing cylinder (38) is provided between the two support legs (37). The upper end of the load-bearing cylinder (38) is fixed to the support leg (37) by the upper fixing member (39), and the lower end is fixed to the frame (5) by the lower fixing member (40). The output end of the load-bearing cylinder (38) is connected to the crossbeam (36).

7. The tobacco logistics compression sealing heat film packaging mechanism according to claim 6, characterized in that: The load-bearing component (13) further includes a load-bearing slide rail (41) and a load-bearing slider (42). The load-bearing slide rail (41) is provided at both ends of the crossbeam (36), and the load-bearing slider (42) is provided on the support leg (37). The load-bearing slide rail (41) and the load-bearing slider (42) are slidably connected. The bottom of the support leg (37) is provided with a clearance opening (43).

8. The tobacco logistics compression sealing heat film packaging mechanism according to claim 6, characterized in that: The carrying platform (16) includes a support plate (44), a conveyor belt assembly (45), a carrying plate (46), and a carrying shaft (47). The support plates (44) are respectively provided at both ends of the crossbeam (36), and the conveyor belt assembly (45) is provided between the two support plates (44). The conveyor belt assembly (45) includes an electric roller (48), a driven roller (49), a conveyor belt (50), and a limiting driven roller (51). The electric roller (48) and the driven roller (49) are arranged in parallel between the two support plates (44). The conveyor belt (50) is provided between the electric roller (48) and the driven roller (49). The carrying plate (46) is provided on the lower side of the upper layer of the conveyor belt (50), and the carrying shaft (47) is provided on the lower side of the carrying plate (46). The carrying plate (46) and the carrying shaft (47) are respectively fixed on the support plate (44), and the limiting driven roller (51) is provided on the lower side of the lower layer of the conveyor belt (50).

9. The tobacco logistics compression sealing heat film packaging mechanism according to claim 1, characterized in that: The upper film roller group (6) is also provided with a clamping film assembly (52). The clamping film assembly (52) includes a clamping motor (53), an active film feeding roller (54), and a driven film feeding roller (55). The clamping motor (53) is connected to the active film feeding roller (54), and the active film feeding roller (54) and the driven film feeding roller (55) are arranged in parallel.

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