Preservative film packaging machine
By designing an automated process for the plastic wrap packaging machine, the problems of slow speed and inconsistent results of traditional plastic wrap packaging have been solved, achieving efficient and stable packaging results that are suitable for large-scale production.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- XIAMEN QIHENGDA TECH CO LTD
- Filing Date
- 2025-09-23
- Publication Date
- 2026-07-21
AI Technical Summary
Traditional plastic wrap packaging methods are slow and inconsistent in their effectiveness, making them unsuitable for large-scale production.
Design a plastic wrap packaging machine that includes film feeding, film delivery, film stretching, cutting, and wrapping mechanisms to achieve an automated packaging process through mechanized collaborative work.
It greatly improves packaging speed and efficiency, ensures packaging stability and consistency, and adapts to the needs of large-scale production.
Smart Images
Figure CN224529149U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of packaging equipment technology, and more specifically, to a food preservation film packaging machine. Background Technology
[0002] Plastic wrap, a flexible, airtight, and moisture-proof plastic packaging product, is widely used in food preservation and product packaging. Traditionally, the process involves attaching a roll of plastic wrap to a rotating shaft, manually pulling out the wrap to wrap the product, and then cutting it to complete the packaging. However, this method is slow and produces inconsistent packaging results, making it unsuitable for large-scale production. Utility Model Content
[0003] The purpose of this utility model is to provide a plastic wrap packaging machine, which solves the technical problem of how to improve packaging speed and effect to meet the needs of large-scale production.
[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution.
[0005] This utility model provides a plastic wrap packaging machine, comprising: a frame with a wrapping station on the frame; a film feeding mechanism rotatably mounted on the frame and for feeding plastic wrap rolls; a film feeding mechanism movably mounted on the frame and located behind the wrapping station, the film feeding mechanism having a plurality of comb teeth spaced apart in a left-right direction, the film feeding mechanism being able to move relative to the frame to drive the comb teeth forward toward or backward toward the wrapping station; and a film pulling mechanism movably mounted on the frame to pull the film at the wrapping station. The machine can switch between front and rear positions and includes a fixed seat and a movable seat that can move relative to each other. The movable seat includes several clamping parts arranged at intervals in the left-right direction, and each clamping part is staggered with each comb tooth in the left-right direction. The movable seat moves relative to the fixed seat to drive the clamping parts to close or separate from the fixed seat. A cutting mechanism is mounted on the frame and is used to perform a cutting operation between the film feeding mechanism and the film pulling mechanism. A wrapping mechanism is mounted on the frame and is used to perform a wrapping operation on the product at the wrapping station.
[0006] In some embodiments of this application, the film-laying mechanism includes a fixed member, a movable member, an elastic member, and an adjusting member; the movable member is disposed opposite to the fixed member, and one end of the movable member is hinged to the fixed member; the elastic member is connected to both the fixed member and the movable member; the adjusting member is movably connected to the fixed member, and the adjusting member moves relative to the fixed member to push against or not push against the movable member, thereby giving the film-laying mechanism an expanded state and a contracted state; when the adjusting member pushes against the movable member, causing the elastic member to deform, and the movable member rotates away from the fixed member, the film-laying mechanism is in an expanded state; when the adjusting member does not push against the movable member, the deformation of the elastic member recovers, and drives the movable member to rotate closer to the fixed member, the film-laying mechanism is in a contracted state.
[0007] In some embodiments of this application, the adjusting member is hinged to the fixing member, one end of the adjusting member is a pushing end, the pushing end is located between the fixing member and the movable member, and the adjusting member rotates relative to the fixing member to drive the pushing end to push or not push the movable member, and the other end of the adjusting member is an operating end, and the operating end is exposed outside the fixing member.
[0008] In some embodiments of this application, the film feeding mechanism further includes a main shaft and at least two spring pieces arranged at intervals around the outer periphery of the main shaft. The main shaft is connected to the fixing member and is located on the side of the fixing member facing the movable member. The main shaft is used to rotatably connect to the frame. The spring pieces are connected to the main shaft and are arranged sequentially with the fixing member along the axial direction of the main shaft.
[0009] In some embodiments of this application, the film feeding mechanism includes a traction structure and two rollers; the traction structure includes a first part and a second part connected in an L-shape, the first part having the comb teeth at one end away from the second part, the second part being rotatably mounted on the frame and rotating relative to the frame to drive the comb teeth to move forward or backward; the two rollers are respectively located at one end of the second part away from the first part and at the connection between the second part and the first part, and are both located on the side of the second part facing away from the first part.
[0010] In some embodiments of this application, the cling film packaging machine further includes a lower film feeding mechanism, which includes a transmission structure, a support base, and a lower clamping plate. The transmission structure includes a first transmission rod, a transmission base, and a second transmission rod arranged sequentially from top to bottom. The two ends of the first transmission rod are respectively hinged to one end of the transmission base and the support base. The second transmission rod is connected to the lower clamping plate, and the two ends of the transmission rod are respectively hinged to the other end of the transmission base and the support base. The lower clamping plate is provided with lower comb teeth. The second part is provided with a contact portion. When the second part rotates relative to the frame to drive the comb teeth forward, it can push the first transmission rod downward and make the lower clamping plate and the first part close together vertically, and the lower comb teeth are aligned with the comb teeth.
[0011] In some embodiments of this application, there are two film-pulling mechanisms, namely a front film-pulling mechanism and a rear film-pulling mechanism; the front film-pulling mechanism and the rear film-pulling mechanism are arranged sequentially and configured such that the clamping part of the front film-pulling mechanism and the clamping part of the rear film-pulling mechanism pass through the space between two adjacent comb teeth and close vertically with the corresponding fixing seat; the cutting mechanism is used to perform a cutting operation between the film feeding mechanism and the rear film-pulling mechanism.
[0012] In some embodiments of this application, the coating mechanism includes a coating mechanism and a lifting mechanism located at the coating station; the coating mechanism includes a left coating plate, a right coating plate, a front coating plate, and a rear coating plate located above the film pulling mechanism. The left and right coating plates can move synchronously in the left-right direction to move closer to each other or further away from each other, and the front and rear coating plates can move synchronously in the front-back direction to move closer to each other or further away from each other; the lifting mechanism includes a lifting seat, which is vertically mounted on the frame and used to support the product; when the left and right coating plates are further away from each other, and the front and rear coating plates are further away from each other, the lifting seat rises relative to the frame, which can lift the product on the lifting seat above the coating mechanism.
[0013] In some embodiments of this application, the plastic wrap packaging machine further includes two film pressing mechanisms arranged at intervals in the left-right direction. Each film pressing mechanism includes a slide that can be raised and lowered relative to the frame and a top block that can be slidably disposed on the slide in the left-right direction. The top blocks of the two film pressing mechanisms are respectively used to abut against the left covering plate and the right covering plate upward.
[0014] In some embodiments of this application, the frame is further provided with a feeding station arranged side by side with the wrapping station, and the feeding station is located in front of the wrapping station; the lifting seat includes a plurality of lifting bars arranged at intervals in the left-right direction; the cling film packaging machine further includes a material transfer mechanism, which is movably disposed on the frame in the front-back direction to switch between the feeding station and the wrapping station, and includes a plurality of material transfer bars arranged at intervals in the left-right direction, and the material transfer bars are staggered from the lifting block in the left-right direction.
[0015] As can be seen from the above technical solution, the embodiments of this utility model have at least the following advantages and positive effects: In the plastic wrap packaging machine of this utility model embodiment, before operation, a plastic wrap roll is first placed outside the film feeding mechanism to provide plastic wrap raw materials for the entire packaging process. Specifically, the comb teeth on the film feeding mechanism position and pull the plastic wrap. The movement of the film feeding mechanism relative to the frame drives the comb teeth forward towards the wrapping station, which can gradually move the plastic wrap forward towards the wrapping station, preparing for the subsequent film pulling operation. When the film feeding mechanism delivers the plastic wrap to the appropriate position, the film pulling mechanism moves behind the wrapping station, and the movable seat moves relative to the fixed seat, so that each clamping part passes between two adjacent comb teeth and closes with the fixed seat, thereby clamping the plastic wrap. Subsequently, the film pulling mechanism moves forward to pull the clamped plastic wrap to cover the wrapping station. When the film pulling mechanism stretches the plastic wrap to the appropriate length, the cutting mechanism performs a cutting operation between the film feeding mechanism and the film pulling mechanism, cutting and separating the plastic wrap required for wrapping the product from the subsequent unused plastic wrap. After the cling film is cut, the wrapping mechanism begins to operate, performing a wrapping operation on the product at the wrapping station, tightly wrapping the cling film around the product surface, thus completing the entire wrapping process. Therefore, through the coordinated work of various mechanisms, this cling film packaging machine realizes the entire process of film feeding, delivery, stretching, cutting, and wrapping, greatly improving packaging speed. Furthermore, by replacing manual labor with mechanization, it eliminates the randomness of manual operation, ensuring packaging stability and consistency, improving packaging effectiveness, and thus adapting to the needs of large-scale production. Attached Figure Description
[0016] The various objectives, features, and advantages of this invention will become more apparent from the following detailed description of preferred embodiments in conjunction with the accompanying drawings. The drawings are merely illustrative illustrations of the invention and are not necessarily drawn to scale. In the drawings, the same reference numerals always denote the same or similar parts. Wherein: Figure 1 This is a schematic diagram of a plastic wrap packaging machine according to an exemplary embodiment.
[0017] Figure 2 yes Figure 1 A sectional view.
[0018] Figure 3 yes Figure 1 A schematic diagram of the structure after the frame is removed.
[0019] Figure 4 yes Figure 1 A schematic diagram of the intermediate-wave membrane mechanism.
[0020] Figure 5 yes Figure 4 A schematic diagram of the exploded structure of the intermediate-wave membrane mechanism.
[0021] Figure 6 yes Figure 3 The diagram shows the structure of the film feeding mechanism, the lower film feeding mechanism, the film pulling mechanism, and the film cutting mechanism.
[0022] Figure 7 yes Figure 6 Detailed structural diagrams of the middle film feeding mechanism and the lower film feeding mechanism.
[0023] Figure 8 yes Figure 2 A schematic diagram of the covering mechanism in the image.
[0024] Figure 9 yes Figure 2 A schematic diagram of the medium-pressure membrane mechanism.
[0025] The annotations in the attached figures are explained as follows: 1. Rack; 2. Film feeding mechanism; 21. Fixed component; 22. Moving component; 23. Elastic component; 24. Adjusting component; 241. Pushing end; 2411. Bearing; 242. Operating end; 25. Main shaft; 26. Spring; 3. Film feeding mechanism; 31. Traction structure; 311. First part; 3111. Comb teeth; 312. Second part; 3121. Contact part; 32. Roller; 33. Support; 34. Rotating rod; 35. Control structure; 351. Rack; 352. Gear; 353. Handle; 4. Membrane stretching mechanism; 41. Front membrane stretching mechanism; 42. Rear membrane stretching mechanism; 43. Fixed base; 44. Movable base; 5. Cutting mechanism; 51. Base; 52. Blade holder; 53. Blade; 6. Wrapping mechanism; 61. Covering mechanism; 611. Left covering plate; 612. Right covering plate; 613. Front covering plate; 614. Rear covering plate; 62. Lifting mechanism; 621. Lifting seat; 6211. Lifting bar; 7. Film feeding mechanism; 71. Transmission structure; 711. First transmission rod; 712. Transmission seat; 713. Second transmission rod; 72. Support seat; 73. Lower clamping plate; 731. Lower comb teeth; 8. Film pressing mechanism; 81. Slide block; 82. Top block; 9. Transfer mechanism; 91. Transfer bar; 100. Plastic wrap rolls; 200. Products. Detailed Implementation
[0026] Although the present invention can be readily embodied in various forms, only some specific embodiments are shown in the accompanying drawings and will be described in detail in this specification. It is understood that this specification should be regarded as an exemplary illustration of the principles of the present invention and is not intended to limit the present invention to what is described herein.
[0027] Therefore, a feature pointed out in this specification is used to describe one feature of one embodiment of the present invention, and does not imply that every embodiment of the present invention must have the described feature. Furthermore, it should be noted that this specification describes many features. Although certain features may be combined to illustrate possible system designs, these features may also be used in other combinations not explicitly stated. Therefore, unless otherwise stated, the described combinations are not intended to be limiting.
[0028] In the embodiments shown in the accompanying drawings, the directional indications (such as up, down, left, right, front, and back) used to explain the structure and movement of the various elements of this invention are relative rather than absolute. These descriptions are appropriate when these elements are in the positions shown in the drawings. If the descriptions of the positions of these elements change, these directional indications also change accordingly.
[0029] Please see Figures 1 to 3 The plastic wrap packaging machine provided in one embodiment of this utility model mainly includes a frame 1, a film feeding mechanism 2, a film conveying mechanism 3, a film pulling mechanism 4, a cutting mechanism 5, and a wrapping mechanism 6. A wrapping station is provided on the frame 1. The film feeding mechanism 2 is rotatably mounted on the frame 1 and can be used to wrap the plastic wrap roll 100. The film conveying mechanism 3 is movably mounted on the frame 1 and located behind the wrapping station. The film conveying mechanism 3 has several comb teeth 3111 arranged at intervals in the left-right direction. When the film conveying mechanism 3 moves relative to the frame 1, it can drive the comb teeth 3111 forward or backward away from the wrapping station. The film-stretching mechanism 4 is movably mounted on the frame 1 to switch between the front and rear of the film-coating station. It includes a fixed seat 43 and a movable seat 44 that are relatively movable. The movable seat 44 includes several clamping parts spaced apart in the left-right direction, and each clamping part is offset from each comb tooth 3111 in the left-right direction. The movable seat 44 moves relative to the fixed seat 43 to drive the clamping parts to close or separate from the fixed seat 43. The cutting mechanism 5 is mounted on the frame 1 and is used to perform cutting operations between the film feeding mechanism 3 and the film-stretching mechanism 4.
[0030] The coating mechanism 6 is mounted on the frame 1 and is used to perform coating operations on the product 200 at the coating station.
[0031] In the plastic wrap packaging machine of this utility model embodiment, before operation, the plastic wrap roll 100 is first placed outside the film feeding mechanism 2 to provide plastic wrap raw materials for the entire packaging process. Specifically, the comb teeth 3111 on the film feeding mechanism 3 are used to position and pull the plastic wrap. The film feeding mechanism 3 moves relative to the frame 1, causing the comb teeth 3111 to move forward and approach the wrapping station, which can gradually move the plastic wrap forward and approach the wrapping station, preparing for the subsequent film pulling operation. When the film feeding mechanism 3 delivers the plastic wrap to the appropriate position, the film pulling mechanism 4 moves behind the wrapping station, and the movable seat 44 moves relative to the fixed seat 43, so that each clamping part passes between two adjacent comb teeth 3111 and closes with the fixed seat 43, thereby clamping the plastic wrap. Subsequently, the film pulling mechanism 4 moves forward to drive the clamped plastic wrap to cover the wrapping station. When the film-stretching mechanism 4 stretches the cling film to the appropriate length, the cutting mechanism 5 performs a cutting operation between the film-feeding mechanism 3 and the film-stretching mechanism 4, separating the cling film required to wrap the product 200 from any unused cling film. After the cling film is cut, the wrapping mechanism 6 begins to operate, performing a wrapping operation on the product 200 at the wrapping station, ensuring the cling film tightly wraps the surface of the product 200, thus completing the entire wrapping process. Therefore, through the coordinated work of various mechanisms, this cling film packaging machine realizes the entire process of film feeding, film delivery, film stretching, cutting, and wrapping, greatly improving packaging speed. Furthermore, by replacing manual labor with mechanization, it eliminates the randomness of manual operation, ensures packaging stability and consistency, and improves packaging effectiveness, thus adapting to the needs of large-scale production.
[0032] It should be noted that, since the clamping parts and the comb teeth 3111 are arranged in a staggered manner, when the movable seat 44 moves relative to the fixed seat 43, the clamping parts can close up and down with the fixed seat 43 through the gap between two adjacent comb teeth 3111 to clamp the plastic wrap. In this process, the comb teeth 3111 provide stable positioning and support for the plastic wrap, reducing the possible offset and shaking of the plastic wrap, thereby ensuring that the plastic wrap can be accurately and stably stretched and cut, providing a good foundation for the high-quality wrapping operation of the subsequent wrapping mechanism 6.
[0033] It should be noted that, Figure 2 The dotted line in the diagram represents the extension path of the film stretching mechanism 4, which stretches the plastic wrap from behind the wrapping station to the front of the wrapping station.
[0034] Please see Figure 4 and Figure 5In a specific embodiment, the film-dispensing mechanism 2 includes a fixed member 21, a movable member 22, an elastic member 23, and an adjusting member 24. The movable member 22 is disposed opposite to the fixed member 21, and one end of the movable member 22 is hinged to the fixed member 21. The elastic member 23 is connected to both the fixed member 21 and the movable member 22. The adjusting member 24 is movably connected to the fixed member 21, and the adjusting member 24 moves relative to the fixed member 21 to push against or not push against the movable member 22, thus allowing the film-dispensing mechanism 2 to have an expanded state and a contracted state. When the adjusting member 24 pushes against the movable member 22, causing the elastic member 23 to deform, and the movable member 22 rotates away from the fixed member 21, the film-dispensing mechanism 2 is in an expanded state. When the adjusting member 24 does not push against the movable member 22, and the deformation of the elastic member 23 returns to normal, driving the movable member 22 to rotate closer to the fixed member 21, the film-dispensing mechanism 2 is in a contracted state.
[0035] The initial state of the film-laying mechanism 2 is the retracted state. The operator aligns the plastic wrap roll 100 with the fixing mechanism and pushes it forward, smoothly placing the plastic wrap roll 100 over the fixing mechanism. Subsequently, the control adjustment component 24 is moved, and the film-laying mechanism 2 is switched to the expanded state. As the movable component 22 rotates away from the fixing component 21, the film-laying mechanism 2 can gradually adhere to the inner wall of the plastic wrap roll 100, ultimately forming a locking and fixing of the plastic wrap roll 100. When it is necessary to disassemble and replace the plastic wrap roll 100, the control adjustment component 24 is moved again, and the film-laying mechanism 2 is switched to the retracted state. The movement of the movable component 22 towards the fixing component 21 allows the film-laying mechanism 2 to gradually detach from the inner wall of the plastic wrap roll 100, thereby ensuring that the subsequent pulling action of the plastic wrap roll 100 can smoothly separate the plastic wrap roll 100 from the fixing mechanism.
[0036] Thus, through the coordinated cooperation between the fixing part 21, the movable part 22, the elastic part 23 and the adjusting part 24, the plastic wrap roll 100 can be stably fixed on the film-laying mechanism 2, ensuring that the plastic wrap roll 100 can stably rotate synchronously with the film-laying mechanism 2 during the rotation of the film-laying mechanism 2 relative to the frame 1, thereby improving the stability of the film-laying process.
[0037] In a specific embodiment, the adjusting member 24 is hinged to the fixing member 21. One end of the adjusting member 24 is a pushing end 241, which is located between the fixing member 21 and the movable member 22. The adjusting member 24 rotates relative to the fixing member 21 to drive the pushing end 241 to push or not push the movable member 22. The other end of the adjusting member 24 is an operating end 242, which is exposed outside the fixing member 21.
[0038] The adjusting member 24 forms a lever with the hinge point as the fulcrum. When the operator manually operates the operating end 242 of the adjusting member 24, it can drive the pushing end 241 to move in the opposite direction relative to the operating end 242. Specifically, as the operator acts on the operating end 242, bringing it closer to the fixed member 21, the pushing end 241 moves away from the fixed member 21 and closer to the movable member 22. The pushing end 241, moving closer to the movable member 22, presses against the movable member 22, overcoming the force of the elastic member 23, forcing the movable member 22 to rotate outward around its hinge point with the fixed member 21, thereby expanding the fixed mechanism. Operating the operating end 242 in the opposite way can retract the fixed mechanism, which will not be elaborated further here. The hinge between the operating member and the fixed member 21 makes the fixed mechanism simple to operate and labor-saving.
[0039] In a specific embodiment, the film feeding mechanism 3 further includes a main shaft 25 and at least two spring pieces 26 arranged at intervals around the outer periphery of the main shaft 25. The main shaft 25 is connected to the fixing member 21 and is located on the side of the fixing member 21 facing the movable member 22. The main shaft 25 is used to rotatably connect to the frame 1. The spring pieces 26 are connected to the main shaft 25 and are arranged sequentially with the fixing member 21 in the axial direction of the main shaft 25.
[0040] The main shaft 25 provides a stable rotation center for the film feeding mechanism 3 to rotate relative to the frame 1, thus undertaking the rotation function of the fixing mechanism. In the expanded state, the fixing member 21 and the movable member 22 can abut against the inner wall of the plastic wrap roll 100 from opposite sides of the main shaft 25, thereby providing a specific and feasible structure for the plastic wrap roll fixing mechanism to abut against the inner wall of the plastic wrap roll 100. The spring piece 26 can provide additional fixation for the plastic wrap roll 100, ensuring that the plastic wrap roll 100 can be more stably fixed on the plastic wrap roll 100 fixing mechanism, thereby further improving the stability of the film feeding process.
[0041] Please see Figure 2 , Figure 3 , Figure 6 and Figure 7 In a specific embodiment, the film feeding mechanism 3 includes a traction structure 31 and two rollers 32. The traction structure 31 includes a first part 311 and a second part 312 connected in an L-shape. The end of the first part 311 away from the second part 312 is provided with comb teeth 3111. The second part 312 is rotatably mounted on the frame 1 and rotates relative to the frame 1 to drive the comb teeth 3111 to move forward or backward. The two rollers 32 are respectively located at the end of the second part 312 away from the first part 311 and at the connection between the second part 312 and the first part 311, and are both located on the side of the second part 312 facing away from the first part 311.
[0042] Specifically, the plastic wrap passes in sequence around the roller 32 located at the end of the second part 312 away from the first part 311 and the roller 32 located at the connection between the second part 312 and the first part 311, and extends along the first part 311 towards the end where the comb teeth 3111 are located. Through the specific structural design of the traction structure 31 and the specific arrangement of the two rollers 32, the traction structure 31 can stably perform the film feeding action when the second part 312 rotates relative to the frame 1, and is more flexible and smooth in operation.
[0043] In this embodiment, the traction structure 31 includes a clamp seat and a clamp. The clamp has an L-shaped structure and includes a connecting clamp and a main clamp. The connecting clamp is connected to the clamp seat and forms a second part 312, and the main clamp forms a first part 311. The clamp seat is rotatably mounted on the frame 1.
[0044] In other embodiments, the film feeding mechanism 3 includes a traction structure 31 and a roller 32. The traction structure 31 and the film pulling mechanism 4 are arranged side by side in the front-back direction and are movable on the frame 1. The front end of the traction structure 31 is provided with comb teeth 3111 and the rear end is provided with roller 32.
[0045] In a specific embodiment, the film feeding mechanism 3 further includes supports 33 and a rotating rod 34. Two supports 33 are arranged side-by-side at intervals in the left-right direction, located on the left and right sides of the traction structure 31 respectively, and connected to the frame 1. The rotating rod 34 is connected to the second part 312, with both ends rotatably connected to the two supports 33, so that the second part 312 is rotatably mounted on the frame 1. The supports 33 and the rotating rod 34 are provided to ensure that the second part 312 can rotate smoothly and reliably, reducing swaying and deviation caused by structural instability, thereby improving the reliability of the film feeding mechanism 3.
[0046] Please see Figure 3 and Figure 6 In a specific embodiment, the film feeding mechanism 3 further includes a control structure 35, and at least one support 33 is provided with the control structure 35. The control structure 35 includes a rack 351, a gear 352, and a handle 353. The rack 351 is movably mounted on the support 33. The gear 352 is coaxially rotatably connected to one end of the rotating rod 34 and meshes with the rack 351. The handle 353 is mounted on the rack 351. Through the coordinated operation of the handle 353, rack 351, gear 352, and rotating rod 34, the operator's action of pushing the rack 351 can be converted into the rotation of the rotating rod, making operation easier and less strenuous.
[0047] Please see Figure 2 , Figure 3 , Figure 6 and Figure 7In a specific embodiment, the cling film packaging machine further includes a lower film feeding mechanism 7, which includes a transmission structure 71, a support base 72, and a lower clamping plate 73. The transmission structure 71 includes a first transmission rod 711, a transmission base 712, and a second transmission rod 713 arranged sequentially from top to bottom. The two ends of the first transmission rod 711 are respectively hinged to one end of the transmission base 712 and the support base 72. The second transmission rod 713 is connected to the lower clamping plate 73, and the two ends of the transmission rod are respectively hinged to the other end of the transmission base 712 and the support base 72. The lower clamping plate 73 is provided with lower comb teeth 731. The second part 312 is provided with a contact part 3121. When the second part 312 rotates relative to the frame 1 to drive the comb teeth 3111 to move forward, it can push the first transmission rod 711 downward and make the lower clamping plate 73 and the first part 311 close together, and the lower comb teeth 731 are aligned with the comb teeth 3111.
[0048] The lower film feeding mechanism 7 works in conjunction with the film feeding mechanism 3. While the comb teeth 3111 of the film feeding mechanism 3 move forward, the second part 312 rotates, driving the contact part 3121 to push against the first transmission rod 711. The motion is then transmitted to the second transmission rod 713 via the transmission seat 712, which ultimately causes the second transmission rod 713 to drive the lower clamping piece 73 to move upward. This allows the lower clamping piece 73 to close up and down with the first part 311. The lower clamping piece 73 of the lower film feeding mechanism 7 closes up with the first part 311, and the lower comb teeth 731 and comb teeth 3111 are aligned. This allows for better clamping and conveying of the plastic wrap, improving the stability and reliability of the film feeding and preventing the plastic wrap from falling off or shifting during the conveying process.
[0049] Please see Figure 3 In a specific embodiment, two film-pulling mechanisms 4 are provided, namely a front film-pulling mechanism 41 and a rear film-pulling mechanism 42. The front film-pulling mechanism 41 and the rear film-pulling mechanism 42 are arranged sequentially, and configured such that the clamping parts of the front film-pulling mechanism 41 and the rear film-pulling mechanism 42 pass between two adjacent comb teeth 3111 and close vertically with the corresponding fixing seats 43. The cutting mechanism 5 is used to perform a cutting operation between the film feeding mechanism 3 and the rear film-pulling mechanism 42.
[0050] The clamping part and fixing seat 43 of the front film pulling mechanism 41 first clamp the plastic wrap between two adjacent comb teeth 3111 and pull the plastic wrap a certain distance. During this process, the clamping part and fixing seat 43 of the rear film pulling mechanism 42 clamp the plastic wrap between two adjacent comb teeth 3111 and move forward away from the film feeding mechanism 3. Then the cutting mechanism 5 cuts the plastic wrap between the rear film pulling mechanism 42 and the film feeding mechanism 3. This allows the cutting of a section of plastic wrap that is stably clamped by the front film pulling mechanism 41 and the rear film pulling mechanism 42 respectively, so as to facilitate subsequent packaging. Through the coordinated cooperation of the front film pulling mechanism 41 and the rear film pulling mechanism 42, the stability and accuracy of the film pulling and cutting process are further improved.
[0051] It is conceivable that when the cutting mechanism 5 performs the cutting operation, the front film pulling mechanism 41 is located in front of the film wrapping station, and the rear film pulling mechanism 42 is located behind the film wrapping station.
[0052] It should be noted that in the above embodiments, the clamping portions of the front film-pulling mechanism 41 and the rear film-pulling mechanism 42 sequentially pass through two adjacent comb teeth 3111. Alternatively, the front and rear film-pulling mechanisms 42 may always be positioned behind the comb teeth 3111 during their forward movement, and the front and rear film-pulling mechanisms 42 may move forward sequentially to clamp the plastic wrap. Or, the rear film-pulling mechanism 42 may always be positioned behind the comb teeth 3111 during their forward movement, with the comb teeth 3111 extending directly between the fixing seat 43 and the clamping portion of the front film-pulling mechanism 41 during its forward movement, and the rear film-pulling mechanism 42 subsequently moving forward to clamp the plastic wrap from the gaps between the comb teeth 3111. Alternatively, the gap between the fixing seat 43 and the clamping part of the rear film pulling mechanism 42 can make way for other parts of the film feeding mechanism 3. The comb teeth 3111 first pass between the fixing seat 43 and the clamping part of the rear film pulling mechanism 42, and then extend into the gap between the fixing seat 43 and the clamping part of the front film pulling mechanism 41. Subsequently, the rear film pulling mechanism 42 moves to position the comb teeth 3111 between its fixing seat 43 and the clamping part. In this embodiment, the latter method is specifically implemented.
[0053] Please see Figure 2 , Figure 3 and Figure 8 In a specific embodiment, the coating mechanism 6 includes a coating mechanism 61 and a lifting mechanism 62 located at the coating station. The coating mechanism 61 includes a left coating plate 611, a right coating plate 612, a front coating plate 613, and a rear coating plate 614 located above the film stretching mechanism 4. The left coating plate 611 and the right coating plate 612 can move synchronously in the left-right direction to move closer to each other or further away from each other. The front coating plate 613 and the rear coating plate 614 can move synchronously in the front-back direction to move closer to each other or further away from each other. The lifting mechanism 62 includes a lifting seat 621, which is vertically and elliptically mounted on the frame 1 and used to support the product 200. When the left covering plate 611 and the right covering plate 612 are moving away from each other, and the front covering plate 613 and the rear covering plate 614 are moving away from each other, the lifting seat 621 rises relative to the frame 1, which can lift the product 200 on the lifting seat 621 above the covering mechanism 61.
[0054] When the wrapping mechanism 6 performs the wrapping operation, the left wrapping plate 611 and the right wrapping plate 612 are in opposite and far apart positions, and the front wrapping plate 613 and the rear wrapping plate 614 are also in opposite and far apart positions, forming a large open space between the wrapping plates. The plastic wrap held by the front film pulling mechanism 41 and the rear film pulling mechanism 42 is located below this open space and covers the product 200 above the lifting seat 621. Subsequently, the product 200 is accurately lifted to a specific position above the wrapping mechanism 61 by the rising of the lifting seat 621. During this process, the plastic wrap is stretched upward, and then the four wrapping plates move synchronously in opposite directions from four directions to wrap the product, thereby completing the wrapping. The setting of the wrapping mechanism 6 has the advantages of simple structure and clear coordination.
[0055] It is conceivable that during the wrapping process, the front film-pulling mechanism 41 and the rear film-pulling mechanism 42 are used to clamp the front and rear sides of the plastic wrap. Please see Figure 2 , Figure 3 and Figure 9 In a specific embodiment, the cling film packaging machine further includes two film pressing mechanisms 8 arranged spaced apart in the left-right direction. Each film pressing mechanism 8 includes a slide 81 that can be raised and lowered relative to the frame 1 and a top block 82 that can slide on the slide 81 in the left-right direction. The top blocks 82 of the two film pressing mechanisms 8 are respectively used to abut against the left covering plate 611 and the right covering plate 612, forming a clamping effect on the left and right sides of the cling film, thereby improving the stability of the cling film. The left-right movement of the top block 82 relative to the slide 81 can be adapted to the positions of the left covering plate 611 and the right covering plate 612, suitable for the packaging needs of products 200 of different sizes, thereby improving the adaptability and versatility of the overall structure.
[0056] In this embodiment, the top block 82 is rotatably mounted on the slide block 81 via a roller or bearing 2411 that can slide in the left-right direction.
[0057] Please see Figure 2 and Figure 3 In a specific embodiment, the frame 1 is further provided with a feeding station arranged parallel to the wrapping station, and the feeding station is located in front of the wrapping station. The lifting seat 621 includes a plurality of lifting bars 6211 arranged at intervals in the left-right direction. The cling film packaging machine also includes a material transfer mechanism 9, which is movably mounted on the frame 1 in the front-back direction to switch between the feeding station and the wrapping station, and includes a plurality of material transfer bars 91 arranged at intervals in the left-right direction, and the material transfer bars 91 are staggered from the lifting block in the left-right direction.
[0058] When a product 200 is placed on the lifting seat 621 at the coating station for coating, the transfer mechanism 9 is located at the feeding station with another product 200 waiting for subsequent coating. After the previous product 200 completes its coating process, it can transfer the product 200 to the lifting seat 621, thus achieving continuous feeding and improving overall work efficiency. Specifically, through the interlocking of the transfer bar 91 and the lifting bar 6211, and the rising motion of the lifting seat 621, the product 200 can be transferred from the transfer mechanism 9 to the lifting seat 621, simplifying the product 200 transfer process and offering advantages such as simple structure and ease of implementation.
[0059] In the above embodiments, when the clamping part and the fixing base 43 are closed vertically, an adhesive strip is provided on the side of the clamping part facing the fixing base 43.
[0060] Please see Figure 2 , Figure 3 and Figure 6 In the above embodiments, the cutting mechanism 5 is located above the film stretching mechanism 4 and includes a base 51, an electromagnetic drive assembly, a knife holder 52 and a blade 53. The electromagnetic drive assembly is located inside the base 51 and connected to the knife holder 52. The blade 53 is mounted on the knife holder 52. When the electromagnetic drive assembly is activated, it drives the knife holder 52 to move the blade 53 down to complete the cutting of the plastic wrap.
[0061] It should be noted that the movement of the various moving mechanisms in the above embodiments can be driven by the cooperation between the motor, synchronous pulley, and synchronous belt, and guided by the cooperation between the slide 81 and the guide rail. Alternatively, the movement can be directly driven by a cylinder or hydraulic cylinder, or it can be converted from rotation to movement through the cooperation of a lead screw and nut pair.
[0062] The rotation of the various mechanisms involved in the above embodiments can be driven directly by a motor, or it can be converted into rotation through the cooperation of a cylinder or hydraulic cylinder and a connecting rod.
[0063] Although the present invention has been described with reference to several typical embodiments, it should be understood that the terminology used is descriptive and exemplary, and not restrictive. Since the present invention can be embodied in many forms without departing from the spirit or essence of the invention, it should be understood that the above embodiments are not limited to any of the foregoing details, but should be interpreted broadly within the spirit and scope defined by the appended claims. Therefore, all variations and modifications falling within the scope of the claims or their equivalents should be covered by the appended claims.
Claims
1. A food preservation film packaging machine, characterized in that, include: A frame, wherein a coating station is provided on the frame; The film-feeding mechanism is rotatably mounted on the frame and can be used to attach the plastic wrap roll; The film feeding mechanism is movably mounted on the frame and located behind the film coating station. The film feeding mechanism has a number of comb teeth arranged at intervals in the left-right direction. When the film feeding mechanism moves relative to the frame, it can drive the comb teeth forward to approach or backward to move away from the film coating station. The film-stretching mechanism is movably mounted on the frame to switch between the front and rear of the film-coating station. It includes a fixed seat and a movable seat that are relatively movable. The movable seat includes a plurality of clamping parts arranged at intervals in the left-right direction, and each clamping part is staggered from each comb tooth in the left-right direction. The movable seat moves relative to the fixed seat to drive the clamping parts to close or separate from the fixed seat. A cutting mechanism, mounted on the frame, is used to perform a cutting operation between the film feeding mechanism and the film pulling mechanism; A coating mechanism is mounted on the frame and is used to perform coating operations on the products at the coating station.
2. The food preservation film packaging machine according to claim 1, characterized in that, The film-laying mechanism includes a fixing component, a moving component, an elastic component, and an adjusting component; The movable component is disposed opposite to the fixed component, and one end of the movable component is hinged to the fixed component; The elastic element is connected to the fixed element and the movable element respectively; The adjusting member is movably connected to the fixing member, and the adjusting member moves relative to the fixing member to push against or not push against the moving member, so as to give the film dispensing mechanism an expanded state and a contracted state; When the adjusting member pushes against the movable member, causing the elastic member to deform and the movable member to rotate away from the fixed member, the film-dispensing mechanism is in an expanded state; when the adjusting member stops pushing against the movable member, the deformation of the elastic member is restored, and the movable member is driven to rotate closer to the fixed member, the film-dispensing mechanism is in a contracted state.
3. The food preservation film packaging machine according to claim 2, characterized in that, The adjusting member is hinged to the fixing member. One end of the adjusting member is a pushing end, which is located between the fixing member and the movable member. The adjusting member can rotate relative to the fixing member to drive the pushing end to push or not push the movable member. The other end of the adjusting member is an operating end, which is exposed outside the fixing member.
4. The food preservation film packaging machine according to claim 3, characterized in that, The film feeding mechanism further includes a main shaft and at least two spring pieces arranged at intervals around the outer periphery of the main shaft. The main shaft is connected to the fixing member and is located on the side of the fixing member facing the movable member. The main shaft is used to rotatably connect to the frame. The spring pieces are connected to the main shaft and are arranged sequentially with the fixing member along the axial direction of the main shaft.
5. The food preservation film packaging machine according to claim 1, characterized in that, The film feeding mechanism includes a traction structure and two rollers; The traction structure includes a first part and a second part connected in an L-shape. The comb teeth are provided at the end of the first part away from the second part. The second part is rotatably mounted on the frame and rotates relative to the frame to drive the comb teeth to move forward or backward. The two rollers are located at the end of the second part away from the first part and at the connection between the second part and the first part, respectively, and are both located on the side of the second part facing away from the first part.
6. The food preservation film packaging machine according to claim 5, characterized in that, It also includes a film feeding mechanism, which includes a transmission structure, a support base, and a lower clamping plate. The transmission structure includes a first transmission rod, a transmission base, and a second transmission rod arranged sequentially from top to bottom. The two ends of the first transmission rod are respectively hinged to one end of the transmission base and the support base. The second transmission rod is connected to the lower clamping plate, and the two ends of the transmission rod are respectively hinged to the other end of the transmission base and the support base. The lower clamping plate is provided with lower comb teeth. The second part is provided with a contact part. When the second part rotates relative to the frame to drive the comb teeth to move forward, it can push the first transmission rod downward and make the lower clamping piece close with the first part, and the lower comb teeth are aligned with the comb teeth.
7. The food preservation film packaging machine according to claim 1, characterized in that, The membrane stretching mechanism is provided in two parts, namely a front membrane stretching mechanism and a rear membrane stretching mechanism; The front film pulling mechanism and the rear film pulling mechanism are arranged sequentially, and configured such that the clamping part of the front film pulling mechanism and the clamping part of the rear film pulling mechanism pass through the space between two adjacent comb teeth and close together with the corresponding fixing seat. The cutting mechanism is used to perform a cutting operation between the film feeding mechanism and the film pulling mechanism.
8. The food preservation film packaging machine according to claim 7, characterized in that, The coating mechanism includes a coating mechanism and a lifting mechanism located at the coating station; The coating mechanism includes a left coating plate, a right coating plate, a front coating plate, and a rear coating plate located above the film stretching mechanism. The left and right coating plates can move synchronously in the left-right direction to move closer to each other or further away from each other. The front and rear coating plates can move synchronously in the front-back direction to move closer to each other or further away from each other. The lifting mechanism includes a lifting seat, which is vertically mounted on the frame and used to support the product; When the left covering plate and the right covering plate are moving away from each other, and the front covering plate and the rear covering plate are moving away from each other, the lifting seat rises relative to the frame, which can lift the product on the lifting seat to above the covering mechanism.
9. The food preservation film packaging machine according to claim 8, characterized in that, It also includes two film pressing mechanisms arranged at intervals in the left-right direction. Each film pressing mechanism includes a slide that can be raised and lowered relative to the frame and a top block that can be slidably disposed on the slide in the left-right direction. The top blocks of the two film pressing mechanisms are respectively used to abut against the left covering plate and the right covering plate upward.
10. The food preservation film packaging machine according to claim 8, characterized in that, The frame is also provided with a feeding station arranged side by side with the coating station, and the feeding station is located in front of the coating station; The lifting seat includes a plurality of lifting bars arranged at intervals in the left-right direction; The cling film packaging machine also includes a material transfer mechanism, which is movable on the frame in the front-back direction to switch between the feeding station and the wrapping station, and includes a number of material transfer strips arranged at intervals in the left-right direction, and the material transfer strips are staggered from the lifting strips in the left-right direction.