A film winding machine

Abstract

The utility model relates to product packaging technical field especially is involved in a kind of film wrapping machine, including tail cutting module, tail cutting module includes machine base, setting in the swivel arm cylinder of machine base, swivel arm mechanism includes adapter block and connecting arm, adapter block is set on the bearing seat in machine base, adapter block one end is connected with the telescopic rod of swivel arm cylinder, other end is connected with connecting arm, film sticking mechanism includes film sticking cylinder, adjusting seat and several film sticking blocks, film sticking cylinder is set on connecting arm, adjusting seat is connected with the telescopic rod of film sticking cylinder, several film sticking blocks are set on adjusting seat at equal intervals, film cutting mechanism includes film pressing cylinder, heating wire and roller stand, roller stand is set on connecting arm by elastic guide rod.The film wrapping machine is optimized to tail cutting mechanism, film is collected, film is cut and is ironed as a whole, integrated design greatly reduces the overall occupied space of equipment, simplifies equipment structure, avoids the failure caused by cooperation problem, effectively improves the stability of equipment.

Description

Technical Field

[0001] This utility model relates to the field of product packaging technology, and in particular to a wrapping machine. Background Technology

[0002] In industrial production, film wrapping equipment is an essential piece of equipment for product packaging. Film wrapping machines can cover products or their packaging boxes with film to prevent damage from moisture or during handling and transportation. Traditionally, film wrapping is done manually, but this method is labor-intensive, costly, and inefficient.

[0003] There are some existing wrapping machines, but their functions cannot meet the wrapping process of products, resulting in low equipment efficiency and the following problems: (1) Existing wrapping machines can only wrap the film and cannot cover the top film; (2) Before wrapping begins, the film needs to be placed on the goods manually, which not only reduces packaging efficiency but also poses safety hazards; (3) After the packaging film is wrapped, the packaging film needs to be cut from the film rack manually, and the cut end of the packaging film needs to be ironed and glued to the wrapped packaging film manually. In response to the above problems, patent CN104828269A discloses a gantry wrapping machine with a lifting platform, which can automatically complete the film loading, cutting and ironing operations, improve wrapping efficiency, and complete the wrapping and covering operations in one go. However, in actual use, it has been found that the separate installation of the upper mold mechanism and the film clamping device in the above-mentioned device results in a complex equipment structure, a large space occupation, and increased difficulty in installation and maintenance. Moreover, the separate operation of the upper mold mechanism and the film clamping device requires more power drive and control components, which not only increases the cost of the equipment, but may also cause failures due to coordination problems between multiple components, affecting the stability and reliability of the equipment. At the same time, the separate upper mold mechanism and the film clamping device require precise timing and position calibration during operation. Once a deviation occurs, it will lead to problems such as uneven film application and weak film clamping, which in turn affects the packaging quality of the product. Utility Model Content

[0004] To address the problem of poor synchronization caused by the separate upper mold mechanism and film cutting mechanism in existing wrapping machines, this invention provides a wrapping machine that optimizes the tail cutting mechanism, integrating film upper mold, film cutting, and film heating into one unit. This integrated design significantly reduces the overall space occupied by the equipment, simplifies the equipment structure, avoids malfunctions caused by coordination issues, and effectively improves the stability of the equipment.

[0005] This utility model provides a wrapping machine, including a frame, and a tail-cutting module is provided inside the frame for cutting the packaging film and hot-sticking the cut end of the packaging film to the already wrapped packaging film. The tail-cutting module includes...

[0006] The machine base is horizontally positioned, and a rotary arm cylinder is installed inside the machine base.

[0007] The boom mechanism includes a transition block and a connecting arm. The transition block is mounted on a bearing seat inside the machine base. One end of the transition block is connected to the telescopic rod of the boom cylinder, and the other end is connected to the connecting arm.

[0008] The film application mechanism includes a film application cylinder, an adjusting seat, and several film application blocks. The film application cylinder is mounted on a connecting arm, the adjusting seat is connected to the telescopic rod of the film application cylinder, and the several film application blocks are evenly spaced on the adjusting seat.

[0009] The film-cutting mechanism includes a film-pressing roller, a heating wire, and a roller frame. The roller frame is mounted on the connecting arm via an elastic guide rod. Both the film-pressing roller and the heating wire are mounted on the roller frame, with the film-pressing roller located inside the heating wire.

[0010] The tail-pulling mechanism includes a housing, a guide rail, a chuck, and a tail-pulling cylinder. The tail-pulling cylinder is located at one end of the housing, and the guide rail is located at the other end. The chuck is connected to the telescopic rod of the tail-pulling cylinder, and the chuck is equipped with rollers that are adapted to the guide rail.

[0011] The tail-cutting module of the wrapping machine has been optimized, and the various mechanisms work closely together to efficiently and stably complete the cutting and tail-sticking of the packaging film. This improves the quality and efficiency of wrapping and meets the packaging needs of different items. Moreover, due to the modular design, each mechanism is easy to install, debug and maintain, reducing the operating cost and maintenance difficulty of the equipment.

[0012] Furthermore, the tail-cutting module also includes a buffer mechanism, which comprises a push rod and a spring. An extension seat is provided on the machine base towards the connecting arm, and the buffer mechanism is mounted on the extension seat. The buffer mechanism is located at the end of the connecting arm below, away from the machine base. The rotating arm mechanism is horizontally positioned when not in use. When needed, the telescopic rod of the rotating arm cylinder moves forward, causing the adapter block to rotate, thereby verticalizing the connecting arm to the side of the winding machine, and then the wrapping operation begins. After each wrapping operation is completed, the telescopic rod of the rotating arm cylinder moves backward, the adapter block rotates in the opposite direction, and the connecting arm returns from the vertical position to the horizontal position. The buffer mechanism effectively cushions the connection arm.

[0013] Furthermore, a rocker arm module is installed within the frame. This module includes a rocker arm, a rocker arm beam, and a film-laying mechanism. The rocker arm beam is rotatably mounted on the top of the frame via a drive motor. The rocker arm is vertically mounted at the end of the rocker arm beam. The film-laying mechanism, via a film-laying trolley, can reciprocate up and down along the rocker arm for wrapping the packaging film. The drive motor controls the rotation speed of the rocker arm beam, causing the rocker arm to perform corresponding circular motions. The reciprocating motion of the film-laying trolley on the rocker arm allows adjustment of the film-laying position according to the height of different items and packaging requirements.

[0014] Furthermore, the film unwinding mechanism includes an unwinding frame, an unwinding shaft, and an unwinding rubber roller. Both the unwinding shaft and the unwinding rubber roller are mounted on the unwinding frame. The unwinding shaft holds the stretch film roll, and the unwinding frame is equipped with an unwinding motor for driving the unwinding rubber roller to rotate. After the unwinding motor starts, it drives the unwinding rubber roller to rotate. The unwinding rubber roller contacts the stretch film roll, and through friction, drives the stretch film roll to rotate on the unwinding shaft, thereby achieving the unwinding of the stretch film. During the unwinding process, the rotation speed of the unwinding rubber roller can be adjusted according to the actual winding requirements.

[0015] Furthermore, a top-covering film mechanism is provided on one side of the frame. The top-covering film mechanism includes a film roll holder, a cutting assembly, and a film pulling assembly. The film roll holder reciprocates longitudinally along the frame via a vertical moving rail. The cutting assembly is located at the film exit end of the film roll holder. The film pulling assembly pulls the packaging film reciprocates laterally along the frame via a horizontal moving rail.

[0016] The film roll holder is used to hold packaging film rolls. The vertical moving rail can flexibly adjust the longitudinal position of the film roll holder to adapt to the top film covering requirements of items of different sizes. Under the action of the horizontal moving rail, the film pulling assembly smoothly pulls the packaging film laterally along the frame, and uses the cutting assembly to cut the packaging film, so that the packaging film evenly covers the top of the item.

[0017] Furthermore, the cutting assembly includes two side plates fixed to both ends of the film roll holder. An upper fixed beam and a lower fixed beam are positioned between the two side plates. An upper pressure plate is connected to the upper fixed beam via a film-pressing cylinder, and a lower pressure plate is positioned on the lower fixed beam opposite to the upper pressure plate. A heating wire is installed on the side of the lower fixed beam away from the film exit end. When the film pulling assembly pulls the packaging film to the appropriate position, the film-pressing cylinder pushes the upper pressure plate downwards, cooperating with the lower pressure plate to tightly clamp the packaging film. At this point, the packaging film is stably fixed between the upper and lower pressure plates, preparing for the subsequent cutting operation. The heating wire is then energized and heats up, and the high temperature generated quickly melts the packaging film. Compared to traditional mechanical cutting methods, this method of cutting packaging film using a heating wire has advantages such as faster cutting speed and no debris generation, effectively improving the efficiency and quality of packaging film cutting, thereby enhancing the overall wrapping effect of the wrapping machine on the top of the item.

[0018] Furthermore, the film-stretching assembly includes a film-stretching beam. Several clamps are mounted on the side of the film-stretching beam near the film exit end. Guide rail beams are mounted at both ends of the film-stretching beam, and the guide rail beams are slidably connected to the frame via slides at their top ends. Two linear bearings are mounted on the top of the frame, and the slides have two open bearing seats adapted to the linear bearings. When the film-stretching assembly starts working, the clamps on the film-stretching beam grip the packaging film. Because the guide rail beams at both ends of the film-stretching beam are slidably connected to the frame via slides, and the open bearing seats of the slides are adapted to the linear bearings on the top of the frame, the film-stretching beam can move smoothly laterally along the linear bearings on the top of the frame. During this movement, the film-stretching beam, with the clamping force of the clamps, moves the packaging film along with it, ensuring that the packaging film accurately covers the top of the item.

[0019] Furthermore, a fence is installed around the frame, and the fence is welded and fixed to the frame. The fence is connected to the frame by welding, which provides high stability and strength. The fence is of moderate height, which does not affect the operator's normal operation and observation of the wrapping machine, while effectively blocking potential dangers and providing reliable safety for the operator.

[0020] The beneficial effects of this utility model are as follows:

[0021] This utility model provides a wrapping machine that, through reasonable optimization of mechanisms such as the tail-cutting module, rocker arm module, film feeding mechanism, and top-covering mechanism, achieves efficient coordination of a series of packaging actions, including film cutting, film application, tail pulling, and top-covering. The integrated design of the tail-cutting module reduces equipment space occupation and improves stability. The cooperation between the rocker arm module and the film feeding mechanism can adjust the wrapping position of the packaging film according to the needs of different items. The top-covering mechanism can flexibly adapt to the top-covering work of items of different sizes, and the use of electric heating wire to cut the packaging film improves the working effect. It can not only effectively improve packaging quality and efficiency and meet the packaging needs of different items, but also reduce the operating cost and maintenance difficulty of the equipment. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the first angle of the wrapping machine;

[0024] Figure 2 This is a schematic diagram of the wrapping machine from the second angle;

[0025] Figure 3yes Figure 1 Enlarged view of point A in the image;

[0026] Figure 4 yes Figure 1 Enlarged view of point A in the image (with the fence and the wrapped membrane roll hidden);

[0027] Figure 5 This is a schematic diagram of the tail-cutting module from the first angle;

[0028] Figure 6 This is a first-angle schematic diagram of the tail-cutting module (the base side plate and the tail-pulling mechanism side plate are hidden).

[0029] Figure 7 This is a second-angle schematic diagram of the tail-cutting module;

[0030] Figure 8 This is a schematic diagram of the top-covering membrane mechanism from the first angle;

[0031] Figure 9 This is a second-angle schematic diagram of the top-covering membrane mechanism;

[0032] Figure 10 yes Figure 9 Enlarged view of point B in the image;

[0033] In the diagram, 100 is the frame and 11 is the fence.

[0034] 200. Tail-cutting module, 21. Base, 211. Rotating arm cylinder, 212. Extension seat, 22. Rotating arm mechanism, 221. Adapter block, 222. Connecting arm, 223. Bearing seat, 23. Film application mechanism, 231. Film application cylinder, 232. Adjusting seat, 233. Film application block, 24. Film cutting mechanism, 241. Pressing roller, 242. Heating wire one, 243. Roller frame, 25. Tail-pulling mechanism, 251. Housing, 252. Guide rail, 253. Clamp, 254. Tail-pulling cylinder, 255. Roller, 26. Buffer mechanism, 261. Push rod, 262. Spring;

[0035] 300. Rocker arm module; 31. Rocker arm; 32. Rocker arm beam; 33. Film unwinding mechanism; 331. Unwinding frame; 332. Unwinding shaft; 333. Unwinding roller; 334. Stretch film roll; 335. Unwinding motor; 34. Drive motor; 35. Film unwinding trolley;

[0036] 400. Top covering mechanism; 41. Film roll support; 42. Cutting assembly; 421. Side plate; 422. Upper fixed beam; 423. Lower fixed beam; 424. Film pressing cylinder; 425. Upper pressure plate; 426. Lower pressure plate; 427. Heating wire II; 43. Film pulling assembly; 431. Film pulling beam; 432. Clamp; 433. Guide rail beam; 434. Slide; 435. Linear bearing; 436. Open bearing seat; 44. Vertical moving rail; 45. Lateral moving rail. Detailed Implementation

[0037] The technical solution of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are some embodiments of this utility model, but not all embodiments.

[0038] To optimize the tail-cutting mechanism, a wrapping machine integrating film application, film cutting, and film heating is designed, such as... Figure 1 As shown, the device includes a frame 100, within which a tail-cutting module 200 is installed for cutting the packaging film and hot-sticking the cut end of the packaging film onto the already wrapped packaging film. The tail-cutting module 200 includes a base 21, a rotating arm mechanism 22, a film-applying mechanism 23, a film-cutting mechanism 24, and a tail-pulling mechanism 25. The base 21 is horizontally positioned, and a rotating arm cylinder 211 is installed within the base 21. The rotating arm mechanism 22 includes a transition block 221 and a connecting arm 222. The transition block 221 is mounted on a bearing seat 223 within the base 21. One end of the transition block 221 is connected to the telescopic shaft of the rotating arm cylinder 211, and the other end is connected to the connecting arm 222. The film-applying mechanism 23 includes a film-applying cylinder 231, an adjusting seat 232, and several film-applying blocks 233. The film-applying cylinder 231 is mounted on the connecting arm 222 and adjusted... The seat 232 is connected to the telescopic shaft of the film-applying cylinder 231. Several film-applying blocks 233 are equally spaced on the adjusting seat 232. The film-cutting mechanism 24 includes a film-pressing roller 241, a heating wire 242, and a roller frame 243. The roller frame 243 is mounted on the connecting arm 222 via an elastic guide rod 244. The film-pressing roller 241 and the heating wire 242 are both mounted on the roller frame 243. The film-pressing roller 241 is located inside the heating wire 242. The tail-pulling mechanism 25 includes a housing 251, a guide rail 252, a clamp 253, and a tail-pulling cylinder 254. One end of the housing 251 is provided with the tail-pulling cylinder 254, and the other end is provided with the guide rail 252. The clamp 253 is connected to the telescopic shaft of the tail-pulling cylinder 254. The clamp 253 is provided with a roller 255 that is adapted to the guide rail 252.

[0039] The telescopic rod of the tail-pulling cylinder 254 is connected to the clamp 253. The housing 251 is provided with a guide rail 252 to guide the movement of the clamp 253. The operation of the tail-pulling cylinder 254 can control the clamp 253 to move along the guide rail 252. The housing 251 is provided with a strip groove for the clamp 253 to move. The clamp 253 and the housing 251 cooperate to clamp the packaging film. The telescopic rod of the film-applying cylinder 231 is connected to the adjusting seat 232. A film-applying block 233 is mounted on the adjusting seat 232, and a heating rod is installed inside the film-applying block 233. The film-applying cylinder 231 can drive the adjusting seat 232 to move back and forth, thereby causing the film-applying block 233 to move back and forth. The heating rod ensures that the packaging film adheres tightly to the packaged goods, allowing the packaging film to wrap around the goods. To better conform to the outer surface of the goods, the film-applying block 233 is equipped with a U-shaped base. A pin is located in the middle of the U-shaped base for connecting the film-applying block 233. A spring is also installed between the film-applying block 233 and the U-shaped base, allowing the film-applying block 233 to rotate slightly according to the outer surface of the goods. A temperature detector can also be installed on the film-applying block 233 to improve the safety factor in production. The film cutting mechanism 24 includes a film pressing roller 241, a heating wire 242, and a roller frame 243. The heating wire 242 and the film pressing roller 241 are both parallel to the length direction of the roller frame 243. The film pressing roller 241 is located inside the heating wire 242. The film pressing roller 241 is used to press the packaging film. After pressing the packaging film, the heating wire 242 melts the packaging film.

[0040] The frame 100 is surrounded by a fence 11, which is welded and fixed to the frame 100. The fence 11 is made of high-strength steel, which has good toughness and impact resistance, and can effectively prevent external objects from affecting and damaging the internal equipment of the frame 100. The height of the fence 11 is carefully designed so that it will not affect the operator's operation of the wrapping machine, while providing good protection.

[0041] like Figure 5-7As shown, the tail-cutting module 200 is initially placed horizontally. When it is needed, the telescopic rod of the rotating arm cylinder 211 moves forward, pushing the adapter block 221 to rotate, so that the connecting arm 222 stands vertically next to the packaged product. The adapter block 221, through the connecting arm 222, enables the film-applying mechanism 23, the film-cutting mechanism 24 and the tail-pulling mechanism 25 to reach the appropriate working position, and then the film-applying work begins. During packaging, the rotating arm cylinder 211 first drives the adapter block 221, causing the connecting arm 222 to move forward. Then, the film-applying cylinder 231 drives the adjusting seat 232 to move forward. The film-applying block 233 with a heating rod is used to make the packaging film adhere tightly to the packaged goods. Then, the packaging is rotated and wrapped around the packaged goods. When the packaging is completed, the connecting arm 222 moves forward, causing the pressure roller 241 to press the packaging film. Then, the heating wire 242 melts the packaging film. At the same time, the tail-pulling cylinder 254 drives the clamp 253 to clamp the packaging film. In the next operation, the tail-pulling cylinder 254 only needs to drive the clamp 253 to release the packaging film, and then the heated film-applying block 233 makes the packaging film adhere tightly to the packaged goods. Subsequent operations only need to repeat the above actions.

[0042] To provide cushioning support for the horizontal connecting arm 222, the tail-cutting module 200 also includes a cushioning mechanism 26, which includes a push rod 261 and a spring 262. An extension seat 212 is provided on the base 21 toward the connecting arm 222, and the cushioning mechanism 26 is provided on the extension seat 212. The cushioning mechanism 26 is located at the end of the connecting arm 222 away from the base 21.

[0043] The push rod 261 and spring 262 constitute a hydraulic damper. When the connecting arm 222 returns to a horizontal position after completing its work, it will press down against the push rod 261. After being subjected to pressure, the push rod 261 will compress the spring 262. The elastic deformation of the spring 262 will generate a reverse buffering force, thereby providing buffer support for the connecting arm 222 and preventing the connecting arm 222 from rigidly colliding with the extension seat 212 due to inertia. This reduces the impact force on the connecting arm 222 and the entire tail-cutting module 200, which can not only reduce the noise caused by the collision, but also effectively extend the service life of the connecting arm 222 and related components, and improve the stability and reliability of the tail-cutting module 200. Moreover, the way the buffer mechanism 26 is set up allows the elastic push rod 261 to accurately provide buffer support for the connecting arm 222, ensuring that the connecting arm 222 can stop smoothly when returning to a horizontal position, preparing for the next operation.

[0044] like Figure 2As shown, a rocker arm module 300 is provided inside the frame 100. The rocker arm module 300 includes a rocker arm 31, a rocker arm beam 32, and a film feeding mechanism 33. The rocker arm beam 32 is rotatably mounted on the top of the frame 100 by a drive motor 34. The rocker arm 31 is vertically mounted at the end of the rocker arm beam 32. The film feeding mechanism 33 can move up and down along the rocker arm 31 by a film feeding trolley 35 for wrapping packaging film.

[0045] During operation, the drive motor 34 provides power for the rotation of the rocker arm beam 32, enabling it to perform circular motion at the top of the frame 100. As the rocker arm beam 32 rotates, the rocker arm 31, which is vertically connected to it, also performs circular motion, wrapping the items with film. The reciprocating motion of the film-laying carriage 35 on the rocker arm 31 further increases the vertical working flexibility of the film-laying mechanism 33. While rotating in a circular motion, it also moves up and down along the height of the item, allowing the packaging film to be evenly wrapped around the surface of the item, achieving efficient and precise packaging operations. This greatly improves the versatility and applicability of the wrapping machine, meeting diverse packaging needs, improving packaging quality and efficiency, and reducing the labor intensity and cost of manual packaging.

[0046] like Figure 3 and 4 As shown, the film unwinding mechanism 33 includes an unwinding frame 331, an unwinding shaft 332, and an unwinding rubber roller 333. The unwinding shaft 332 and the unwinding rubber roller 333 are both mounted on the unwinding frame 331. The unwinding shaft 332 is used to hold the wound film roll 334. The unwinding frame 331 is equipped with an unwinding motor 335 for driving the unwinding rubber roller 333 to rotate. The unwinding rubber roller 333 is connected to the unwinding motor 335 via gears.

[0047] During the wrapping operation, the unwinding motor 335 starts, driving the unwinding roller 333 to rotate. The unwinding roller 333 contacts the wrapping film roll 334, and through friction, the wrapping film roll 334 rotates on the unwinding shaft 332, thereby releasing the wrapping film. The rotation speed of the unwinding roller 333 can be controlled by adjusting the speed of the unwinding motor 335 according to the actual wrapping requirements. To ensure the accuracy of film release, a tension adjustment device can also be installed on the unwinding frame 331 to adjust in real time according to the tension of the wrapping film, ensuring that the packaging film is always wrapped around the surface of the item with appropriate tension. The unwinding frame 331 can also be equipped with a film breakage detection sensor. When the wrapping film breaks during the unwinding process, the film breakage detection sensor can quickly detect it and send a signal in time. After receiving the signal, the wrapping machine will automatically stop the relevant working parts to prevent the equipment from continuing to operate without film, avoiding any impact on the packaging of the items. At the same time, the operator can deal with the film breakage problem in time according to the prompt, replace the wrapping film roll, and quickly resume normal wrapping operations.

[0048] like Figure 8-10As shown, a top-covering film mechanism 400 is provided on one side of the frame 100. The top-covering film mechanism 400 includes a film roll holder 41, a cutting assembly 42, and a film pulling assembly 43. The film roll holder 41 moves longitudinally and reciprocally along the frame 100 via a vertical moving rail 44. The cutting assembly 42 is located at the film outlet end of the film roll holder 41. The film pulling assembly 43 pulls the packaging film laterally and reciprocates along the frame 100 via a transverse moving rail 45.

[0049] The film roll holder 41 is used to hold the packaging film roll. The vertical moving rail 44 can precisely control the longitudinal position of the film roll holder 41 in the frame 100 to adapt to the top film requirements of items of different heights. The function of the cutting assembly 42 is to accurately cut the packaging film after the top film is applied. The film pulling assembly 43, with the help of the transverse moving rail 45, pulls the packaging film from the film roll holder 41 and moves it laterally to cover the top of the item. The transverse moving rail 45 can ensure that the film pulling assembly 43 moves smoothly and accurately, so that the packaging film can evenly cover the top of the item. The film pulling assembly 43 can firmly clamp the packaging film with the clamp 432, maintaining the flatness and tension of the packaging film during the transverse movement, avoiding wrinkles or looseness.

[0050] The cutting assembly 42 includes two side plates 421 fixed at both ends of the film roll holder 41. An upper fixing beam 422 and a lower fixing beam 423 are provided between the two side plates 421. An upper pressure plate 425 is connected to the upper fixing beam 422 via a film pressing cylinder 424. A lower pressure plate 426 is provided on the lower fixing beam 423 opposite to the upper pressure plate 425. A second heating wire 427 is provided on the side of the lower fixing beam 423 away from the film exit end.

[0051] When the packaging film needs to be cut, the pressure cylinder 424 drives the upper pressure plate 425 to move downwards, cooperating with the lower pressure plate 426 to clamp and fix the packaging film, ensuring that the packaging film will not shift during the cutting process. At this time, the second heating wire 427 is energized and heats up, and the high temperature generated can quickly melt the packaging film, achieving a precise cut. The cutting method using the second heating wire 427 has the advantages of fast cutting speed and smooth cut, avoiding problems such as uneven cuts and tearing of the packaging film that may occur in traditional mechanical cutting methods. At the same time, the two side plates 421 not only support the upper fixed beam 422 and the lower fixed beam 423, but also ensure the structural stability of the entire cutting assembly 42, so that the components can work together during the cutting of the packaging film without shaking or shifting, further improving the accuracy and reliability of the cutting.

[0052] like Figure 2 and 9As shown, the membrane stretching assembly 43 includes a membrane stretching beam 431. Several clamps 432 are provided on the side of the membrane stretching beam 431 near the membrane exit end. Guide rail beams 433 are provided at both ends of the membrane stretching beam 431. The guide rail beams 433 are slidably connected to the frame 100 through the slide 434 at their top ends. Two linear bearings 435 are provided at the top of the frame 100. The slide 434 has two open bearing seats 436 adapted to the linear bearings 435.

[0053] When the packaging film needs to be pulled, the film-pulling beam 431, guided by the guide beam 433, slides on the frame 100 via the slide block 434. The open bearing seat 436 of the slide block 434 cooperates with the linear bearing 435. This design makes the sliding of the film-pulling beam 431 smoother and more stable, reducing friction and resistance, thereby improving the efficiency of film pulling. The clamp 432 is used to clamp the packaging film, ensuring that the packaging film can stably follow the movement of the film-pulling beam 431 during the film pulling process. The sliding of the film-pulling beam 431 is driven by a pulley. The power provided by the pulley is transmitted to the film-pulling beam 431 through the guide beam 433 and the slide block 434, enabling it to accurately perform the film pulling operation according to the set stroke and speed. During the film pulling process, the guide beams 433 and the slide blocks 434 at both ends of the film-pulling beam 431 ensure that the movement trajectory of the film-pulling beam 431 remains straight, avoiding deviation or shaking, thereby ensuring that the packaging film accurately covers the items. Meanwhile, the film-pulling assembly 43 and the cutting assembly 42 work together. When the film-pulling assembly 43 pulls the packaging film to the designated position, the cutting assembly 42 can cut the packaging film in a timely and accurate manner, realizing the efficient automation of the wrapping machine packaging process.

[0054] The above description is illustrative only and not restrictive of this utility model. Those skilled in the art will understand that many modifications, variations or equivalents can be made without departing from the spirit and scope defined by the appended claims, and all such modifications, variations or equivalents will fall within the protection scope of this utility model.

Claims

1. A wrapping machine, comprising a frame (100), characterized in that: The frame (100) is equipped with a tail-cutting module (200) for cutting the packaging film and hot-sticking the cut end of the packaging film to the already wrapped packaging film. The tail-cutting module (200) includes... A base (21) is horizontally arranged, and a rotating arm cylinder (211) is arranged inside the base (21). The rotating arm mechanism (22) includes a transition block (221) and a connecting arm (222). The transition block (221) is mounted on a bearing seat (223) inside the base (21). One end of the transition block (221) is connected to the telescopic shaft of the rotating arm cylinder (211), and the other end is connected to the connecting arm (222). The film application mechanism (23) includes a film application cylinder (231), an adjusting seat (232), and several film application blocks (233). The film application cylinder (231) is mounted on a connecting arm (222), and the adjusting seat (232) is connected to the telescopic shaft of the film application cylinder (231). Several film application blocks (233) are evenly spaced on the adjusting seat (232). A film-cutting mechanism (24) includes a film-pressing roller (241), a first heating wire (242), and a roller frame (243). The roller frame (243) is mounted on a connecting arm (222) via an elastic guide rod (244). The film-pressing roller (241) and the first heating wire (242) are both mounted on the roller frame (243). The film-pressing roller (241) is located inside the first heating wire (242). The tail-pulling mechanism (25) includes a housing (251), a guide rail (252), a chuck (253), and a tail-pulling cylinder (254). The housing (251) has a tail-pulling cylinder (254) at one end and a guide rail (252) at the other end. The chuck (253) is connected to the telescopic shaft of the tail-pulling cylinder (254). The chuck (253) is provided with a roller (255) that is adapted to the guide rail (252).

2. The wrapping machine according to claim 1, characterized in that: The tail-cutting module (200) also includes a buffer mechanism (26), which includes a push rod (261) and a spring (262). The base (21) is provided with an extension seat (212) on the side of the connecting arm (222). The buffer mechanism (26) is located on the extension seat (212) and at the end of the connecting arm (222) away from the base (21).

3. A wrapping machine according to claim 1, characterized in that: The frame (100) is provided with a rocker arm module (300), which includes a rocker arm (31), a rocker arm beam (32) and a film feeding mechanism (33). The rocker arm beam (32) is rotatably mounted on the top of the frame (100) by a drive motor (34). The rocker arm (31) is vertically mounted at the end of the rocker arm beam (32). The film feeding mechanism (33) can move up and down along the rocker arm (31) by a film feeding trolley (35) for wrapping packaging film.

4. A wrapping machine according to claim 3, characterized in that: The film unwinding mechanism (33) includes an unwinding frame (331), an unwinding shaft (332), and an unwinding rubber roller (333). The unwinding shaft (332) and the unwinding rubber roller (333) are both mounted on the unwinding frame (331). The unwinding shaft (332) is used to hold the wound film roll (334). The unwinding frame (331) is equipped with an unwinding motor (335) for driving the unwinding rubber roller (333) to rotate.

5. A wrapping machine according to claim 1, characterized in that: A top-covering film mechanism (400) is provided on one side of the frame (100). The top-covering film mechanism (400) includes a film roll holder (41), a cutting assembly (42), and a film pulling assembly (43). The film roll holder (41) moves longitudinally back and forth along the frame (100) via a vertical moving rail (44). The cutting assembly (42) is located at the film outlet end of the film roll holder (41). The film pulling assembly (43) pulls the packaging film laterally back and forth along the frame (100) via a horizontal moving rail (45).

6. A wrapping machine according to claim 5, characterized in that: The cutting assembly (42) includes two side plates (421) fixed at both ends of the film roll holder (41). An upper fixing beam (422) and a lower fixing beam (423) are provided between the two side plates (421). An upper pressure plate (425) is connected to the upper fixing beam (422) through a film pressing cylinder (424). A lower pressure plate (426) opposite to the upper pressure plate (425) is provided on the lower fixing beam (423). A second heating wire (427) is provided on the side of the lower fixing beam (423) away from the film exit end.

7. A wrapping machine according to claim 5, characterized in that: The membrane stretching assembly (43) includes a membrane stretching beam (431). Several clamps (432) are provided on one side of the membrane stretching beam (431) near the membrane exit end. Guide rail beams (433) are provided at both ends of the membrane stretching beam (431). The guide rail beams (433) are slidably connected to the frame (100) through the slide (434) at their top end. Two linear bearings (435) are provided at the top of the frame (100). The slide (434) has two open bearing seats (436) that are adapted to the linear bearings (435).

8. A wrapping machine according to claim 1, characterized in that: The frame (100) is surrounded by a fence (11), which is welded and fixed to the frame (100).

Images