Packaging film conveying and cutting device

Abstract

The utility model belongs to the field of packaging machines, and provides a packaging film conveying and cutting device which comprises a rack platen, an unwinding shaft, a conveying assembly and a cutting assembly. Wherein the unwinding shaft is connected to the rack bedplate and is used for unwinding a target packaging film; the conveying assembly comprises a conveying support connected to the rack platen, a rotating shaft rotationally installed on the conveying support and a swing arm connected to the rotating shaft and further comprises a traction roller rotationally installed on the conveying support and a pressing roller rotationally installed on the swing arm, and the rotating shaft, the traction roller and the pressing roller are all parallel to the unwinding shaft. The pressing roller is connected to the end, away from the rotating shaft, of the swing arm and is in lap joint with the traction roller through self-weight to cooperate with the traction roller to clamp and convey a target packaging film. The cutting assembly and the unwinding shaft are distributed on the two sides of the conveying assembly and used for cutting the target packaging film.

Description

Technical Field

[0001] This application belongs to the field of packaging machines, and particularly relates to a packaging film conveying and cutting device. Background Art

[0002] As an important device in the modern packaging industry, the three-dimensional packaging machine is widely favored for its ability to automatically complete complex processes such as three-dimensional wrapping, sealing, and forming of products. The device for conveying and cutting packaging film in traditional three-dimensional packaging machines often focuses on meeting the basic conveying and cutting functions in design, while neglecting the further improvement of efficiency and precision, making it difficult to meet the requirements of the modern packaging industry for high-efficiency and flexible production. Moreover, the film threading adjustment is not convenient, and a special pressurizing device needs to be set to make the pressure roller and the driving roller contact. Therefore, it is necessary to solve the above technical problems. Summary of the Invention

[0003] The purpose of the embodiments of this application is to provide a packaging film conveying and cutting device to solve the technical problem of low efficiency of packaging film conveying and cutting in the prior art.

[0004] To achieve the above purpose, the technical solution adopted in this application is: to provide a packaging film conveying and cutting device, including:

[0005] A frame table board;

[0006] A film unwinding reel, connected to the frame table board and used for unwinding the target packaging film;

[0007] A conveying assembly, including a conveying bracket connected to the frame table board, a rotating shaft rotatably installed on the conveying bracket, and a swing arm connected to the rotating shaft. It also includes a traction roller rotatably installed on the conveying bracket and a pressure roller rotatably installed on the swing arm. The rotating shaft, the traction roller, and the pressure roller are all parallel to the film unwinding reel. The pressure roller is connected to the end of the swing arm far from the rotating shaft and relies on its own weight to overlap on the traction roller to cooperate with the traction roller to clamp and convey the target packaging film;

[0008] A cutting assembly, arranged on both sides of the conveying assembly separately from the film unwinding reel and used for cutting the target packaging film.

[0009] Optionally, the conveying assembly further includes a first servo motor, a driving gear connected to the end of the traction roller, and a driven gear connected to the end of the pressure roller;

[0010] The driving gear is also connected to the output end of the first servo motor and can be driven by the first servo motor. The driven gear and the driving gear form a transmission pair.

[0011] Optionally, the conveying assembly further includes a limit bolt threadedly connected to the swing arm;

[0012] The limiting bolt penetrates through the swing arm and its end abuts against the conveying bracket.

[0013] Optionally, the conveying assembly further includes a handle rotatably mounted on the conveying bracket and a rotating block connected to the handle and capable of being driven by the handle to rotate relative to the conveying bracket;

[0014] The rotation path of the rotating block interferes with the swing path of the swing arm so that the swing arm can swing relative to the rotating shaft during the rotation of the rotating block and make the pressure roller and the traction roller approach or move away from each other.

[0015] Optionally, the conveying assembly further includes a cursor sensor connected to the conveying bracket and used for detecting the cursor position on the target packaging film.

[0016] Optionally, the cutting assembly includes a shearing bracket connected to the machine frame platen, a fixed knife and a moving knife mounted on the shearing bracket and capable of approaching or moving away from each other, and an adjusting mechanism drivingly connected to the shearing bracket and capable of making the shearing bracket approach or move away from the conveying assembly;

[0017] The adjusting mechanism includes a connecting plate and a bottom foot plate connected to the shearing bracket, a nut seat connected to the connecting plate, a base connected to the machine frame platen, and a screw rod rotatably mounted on the base and threadedly connected to the nut seat. The shearing bracket is detachably connected to the machine frame platen through the bottom foot plate, and a long slot parallel to the screw rod is provided on the bottom foot plate.

[0018] Optionally, the cutting assembly further includes a second servo motor mounted on the shearing bracket, an eccentric disc connected to the output end of the second servo motor, a connecting rod with two ends respectively hinged to the eccentric disc and the moving knife, and a linear guide rail connected to the shearing bracket;

[0019] The moving knife is slidably connected to the linear guide rail and can be guided by the linear guide rail for sliding.

[0020] Optionally, the cutting assembly further includes a cover plate arranged in a stacked and spaced manner from the fixed knife, and the conveying assembly further includes a film guiding plate connected to the conveying bracket and extending to be close to the film feeding reel to support the target packaging film;

[0021] At least a part of the film guiding plate extends into the space between the fixed knife and the cover plate, and a hollow is provided on the film guiding plate for the pressure roller and the traction roller to abut against.

[0022] Optionally, the cutting assembly further includes a support connected to the shearing bracket and a material guiding block stacked on the support;

[0023] The material guiding block is arranged at an interval from the cover plate along the feeding direction of the conveying assembly and forms an avoidance interval for the moving knife to pass through, and the material guiding blocks cooperate to form a film outlet channel facing the interval between the fixed knife and the cover plate.

[0024] Optionally, the film outlet channel forms a conical port with the large end facing the interval between the fixed knife and the cover plate.

[0025] The beneficial effect of the packaging film conveying and cutting device provided by the present application is that: compared with the prior art, in the packaging film conveying and cutting device provided by the present application, since the pressure roller is connected to the end of the swing arm far from the rotating shaft and can rely on its own weight to lap on the traction roller to cooperate with the traction roller to clamp and convey the target packaging film, the target packaging film unwound from the unwinding reel can be quickly clamped and conveyed through the cooperation of the pressure roller and the traction roller, and the pressing force between the pressure roller and the traction roller can also be automatically and flexibly adjusted according to the material and thickness of the target packaging film. In this way, it is beneficial to significantly improve the conveying and cutting efficiency of the packaging film conveying and cutting device for the target packaging film in the present application, far superior to the prior art. Description of the Drawings

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0027] Figure 1 Partial structural schematic diagram of the packaging film conveying and cutting device provided by the embodiment of the present application Figure 1 ;

[0028] Figure 2 Partial structural schematic diagram of the packaging film conveying and cutting device provided by the embodiment of the present application Figure 2 ;

[0029] Figure 3 Cross-sectional structural schematic diagram of the packaging film conveying and cutting device provided by the embodiment of the present application;

[0030] Figure 4 For Figure 3 Enlarged view of the structure at A in

[0031] Figure 5 For Figure 2 Partial enlarged view at B in

[0032] Among them, the reference numerals in the figures are as follows: 100, frame platen; 200, pay-off reel; 301, conveying support; 302, rotating shaft; 303, swing arm; 304, traction roller; 305, pressure roller; 306, first servo motor; 307, driving gear; 308, driven gear; 309, limit bolt; 310, handle; 311, rotating block; 312, cursor sensor; 313, film guiding plate; 314, hollow; 401, shearing support; 402, fixed knife; 403, moving knife; 404, connecting plate; 405, bottom foot plate; 406, nut seat; 407, base; 408, screw rod; 409, long slot; 410, second servo motor; 411, eccentric disc; 412, connecting rod; 413, linear guide; 414, cover plate; 415, support; 416, material guiding block; 417, film outlet channel. Detailed implementation manners

[0033] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer and more understandable, the present application will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0034] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0035] It should be understood that the orientation or positional relationship indicated by the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present application.

[0036] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality of" means two or more unless otherwise specifically defined.

[0037] Please refer to together Figures 1 to 5, a packaging film conveying and cutting device provided by an embodiment of the present application will be described below. This packaging film conveying and cutting device includes a frame table 100, a film unwinding reel 200, a conveying assembly, and a cutting assembly. Among them:

[0038] The film unwinding reel 200 is connected to the frame table 100 and is used for unwinding the target packaging film; the conveying assembly includes a conveying bracket 301 connected to the frame table 100, a rotating shaft 302 rotatably installed on the conveying bracket 301, and a swing arm 303 connected to the rotating shaft 302. It also includes a traction roller 304 rotatably installed on the conveying bracket 301 and a pressure roller 305 rotatably installed on the swing arm 303. The rotating shaft 302, the traction roller 304, and the pressure roller 305 are all parallel to the film unwinding reel 200. The pressure roller 305 is connected to one end of the swing arm 303 away from the rotating shaft 302 and relies on its own weight to overlap on the traction roller 304 to cooperate with the traction roller 304 to clamp and convey the target packaging film; the cutting assembly and the film unwinding reel 200 are arranged on both sides of the conveying assembly and are used for cutting the target packaging film.

[0039] According to the above structure provided in this embodiment, in the packaging film conveying and cutting device provided in this embodiment, since the pressure roller 305 is connected to one end of the swing arm 303 away from the rotating shaft 302 and can rely on its own weight to overlap on the traction roller 304 to cooperate with the traction roller 304 to clamp and convey the target packaging film, the target packaging film unwound from the film unwinding reel 200 can be quickly clamped and conveyed through the cooperation of the pressure roller 305 and the traction roller 304, and the pressing force between the pressure roller 305 and the traction roller 304 can also be automatically and flexibly adjusted according to the material and thickness of the target packaging film. In this way, it is beneficial to significantly improve the conveying and cutting efficiency of the packaging film conveying and cutting device in this embodiment for the target packaging film, far superior to the prior art.

[0040] In another embodiment of the present application, please refer to Figures 1 to 5 , the conveying assembly further includes a first servo motor 306, a driving gear 307 connected to the end of the traction roller 304, and a driven gear 308 connected to the end of the pressure roller 305; the driving gear 307 is also connected to the output end of the first servo motor 306 and can be driven by the first servo motor 306, and the driven gear 308 and the driving gear 307 form a transmission pair. According to the above structure provided in this embodiment, when the pressure roller 305 is overlapped on the traction roller 304, the driven gear 308 connected to the pressure roller 305 can automatically cooperate with the driving gear 307 to form a gear transmission pair. In this way, the first servo motor 306 can not only make the traction roller 304 and the pressure roller 305 rotate quickly through the driving gear 307 and the driven gear 308, but also make the two rotate synchronously well. This is beneficial to further improve the conveying and cutting efficiency of the packaging film conveying and cutting device in this embodiment for the target packaging film.

[0041] In another embodiment of the present application, please refer to Figures 1 to 5 , the conveying assembly further includes a limit bolt 309 threadedly connected to the swing arm 303; the limit bolt 309 penetrates through the swing arm 303 and its end abuts against the conveying bracket 301. According to the above structure provided in this embodiment, when the limit bolt 309 rotates relative to the swing arm 303, the rotation angle of the swing arm 303 relative to the conveying bracket 301 can be accurately adjusted by abutting against the conveying bracket 301, so that the operator can conveniently and quickly adjust the pre-compression force between the pressure roller 305 and the traction roller 304 and make the packaging film conveying and cutting device in this embodiment better adapt to target packaging films of different materials and thicknesses, which is beneficial to further improving the conveying and cutting efficiency of the packaging film conveying and cutting device in this embodiment for the target packaging film.

[0042] In another embodiment of the present application, please refer to Figures 1 to 5 , the conveying assembly further includes a handle 310 rotatably mounted on the conveying bracket 301 and a rotating block 311 connected to the handle 310 and capable of being driven by the handle 310 to rotate relative to the conveying bracket 301; the rotation path of the rotating block 311 interferes with the swing path of the swing arm 303 so that the swing arm 303 can swing relative to the rotating shaft 302 during the rotation of the rotating block 311 and make the pressure roller 305 and the traction roller 304 approach or separate from each other. According to the above structure provided in this embodiment, rotating the handle 310 relative to the conveying bracket 301 can drive the rotating block 311 to rotate relative to the conveying bracket 301. Since the rotation path of the rotating block 311 interferes with the swing path of the swing arm 303, the pressure roller 305 and the traction roller 304 can be quickly separated when the rotating block 311 rotates to a predetermined position, which is beneficial to quickly passing the target packaging film through the gap between the pressure roller 305 and the traction roller 304 after replacing the target packaging film roll, and thus is also beneficial to further improving the conveying and cutting efficiency of the packaging film conveying and cutting device in this embodiment for the target packaging film.

[0043] In another embodiment of the present application, please refer to Figures 1 to 5 , the conveying assembly further includes a cursor sensor 312 connected to the conveying bracket 301 and used for detecting the cursor position on the target packaging film. According to the above structure provided in this embodiment, the cursor sensor 312 provided on the conveying bracket 301 can make the target packaging film be slit into a predetermined size more quickly, which is beneficial to further improving the conveying and cutting efficiency of the packaging film conveying and cutting device in this embodiment for the target packaging film.

[0044] In another embodiment of the present application, please refer to Figures 1 to 5, the cutting assembly includes a shearing bracket 401 connected to the machine frame platen 100, a fixed knife 402 and a moving knife 403 mounted on the shearing bracket 401 and capable of approaching or separating from each other, and further includes an adjusting mechanism drivingly connected to the shearing bracket 401 and capable of moving the shearing bracket 401 closer to or farther from the conveying assembly; the adjusting mechanism includes a connecting plate 404 and a bottom foot plate 405 connected to the shearing bracket 401, further includes a nut seat 406 connected to the connecting plate 404, a base 407 connected to the machine frame platen 100, and a screw rod 408 rotatably mounted on the base 407 and threadedly connected to the nut seat 406. The shearing bracket 401 is detachably connected to the machine frame platen 100 through the bottom foot plate 405, and a long slot 409 parallel to the screw rod 408 is provided on the bottom foot plate 405.

[0045] According to the above structure provided in this embodiment, by rotating the screw rod 408 relative to the nut seat 406, the nut seat 406 can drive the connecting rod 412 and the shearing bracket 401 connected to the connecting rod 412 to move along the axial direction of the screw rod 408. In this way, the distance between the shearing bracket 401 and the conveying assembly can be adjusted, and the fixed knife 402 and the moving knife 403 connected to the shearing bracket 401 can be better adapted to the conveying assembly, which is beneficial to further improving the conveying and cutting efficiency of the packaging film conveying and cutting device for the target packaging film in this embodiment. In addition, since the long slot 409 parallel to the screw rod 408 is provided on the bottom foot plate 405, after the shearing bracket 401 is adjusted in place along the axial direction of the screw rod 408, the bottom foot plate 405 can be quickly and stably connected to the machine frame platen 100 through the fastener extending into the long slot 409, which is beneficial to further improving the conveying and cutting efficiency of the packaging film conveying and cutting device for the target packaging film in this embodiment.

[0046] In another embodiment of the present application, please refer to Figures 1 to 5 , the cutting assembly further includes a second servo motor 410 mounted on the shearing bracket 401, an eccentric disc 411 connected to the output end of the second servo motor 410, a connecting rod 412 with two ends respectively hinged to the eccentric disc 411 and the moving knife 403, and a linear guide rail 413 connected to the shearing bracket 401; the moving knife 403 is slidably connected to the linear guide rail 413 and can be provided with sliding guidance by the linear guide rail 413. According to the above structure provided in this embodiment, since the moving knife 403 is slidably connected to the linear guide rail 413, the second servo motor 410 can drive the moving knife 403 to quickly approach or separate from the fixed knife 402 through the eccentric disc 411 and the connecting rod 412, which is beneficial to further improving the conveying and cutting efficiency of the packaging film conveying and cutting device for the target packaging film in this embodiment.

[0047] In another embodiment of the present application, please refer to Figures 1 to 5, the cutting assembly further includes a cover plate 414 arranged in a stacked and spaced manner with the fixed knife 402, and the conveying assembly further includes a film guiding plate 313 connected to the conveying bracket 301 and extending close to the unwinding reel 200 to support the target packaging film; at least a part of the film guiding plate 313 extends into the space between the fixed knife 402 and the cover plate 414, and a hollow 314 is provided on the film guiding plate 313 for the pressing roller 305 to abut against the traction roller 304. According to the above structure provided in this embodiment, the film guiding plate 313 that partially extends into the space between the fixed knife 402 and the cover plate 414 and extends close to the unwinding reel 200 can form good support for the target packaging film during the conveying process of the target packaging film and enable it to quickly pass through the space between the fixed knife 402 and the cover plate 414. This is conducive to the moving knife 403 cutting the target packaging film more quickly and is conducive to further improving the conveying and cutting efficiency of the packaging film conveying and cutting device for the target packaging film in this embodiment. It should be noted that in the actual production process, the space between the cover plate 414 and the fixed knife 402 needs to ensure that the cover plate 414 and the fixed knife 402 do not form mechanical interference with the film guiding plate 313 during the movement of the shearing bracket 401 relative to the machine frame platen 100.

[0048] In another embodiment of the present application, please refer to Figures 1 to 5 , the cutting assembly further includes a support 415 connected to the shearing bracket 401 and a material guiding block 416 stacked on the support 415; the material guiding blocks 416 are arranged at intervals along the feeding direction of the conveying assembly with the cover plate 414 and form an avoidance space for the moving knife 403 to pass through, and a film outlet channel 417 is formed by the cooperation between the material guiding blocks 416 and is directly opposite to the space between the fixed knife 402 and the cover plate 414. According to the above structure provided in this embodiment, on the one hand, the material guiding blocks 416 can cooperate with the cover plate 414 to position the moving knife 403; on the other hand, the film outlet channel 417 formed between the material guiding blocks 416 can enable the cut packaging film to be conveyed more quickly, which is conducive to further improving the conveying and cutting efficiency of the packaging film conveying and cutting device for the target packaging film in this embodiment.

[0049] In another embodiment of the present application, please refer to Figures 1 to 5 , the film outlet channel 417 forms a tapered port with the large end facing the space between the fixed knife 402 and the cover plate 414. According to the above structure provided in this embodiment, the tapered port formed by the film outlet channel 417 can enable the cut target packaging film to enter the film outlet channel 417 more quickly, which is conducive to further improving the conveying and cutting efficiency of the packaging film conveying and cutting device for the target packaging film in this embodiment.

[0050] The above are only the preferred embodiments of the present application and are not intended to limit the present application. Any modifications, equivalent replacements, and improvements made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A packaging film conveying and cutting device, characterized in that, Comprising: A machine frame platen (100); A pay-off reel (200), connected to the machine frame platen (100) and used for paying off a target packaging film; A conveying assembly, including a conveying bracket (301) connected to the machine frame platen (100), a rotating shaft (302) rotatably mounted on the conveying bracket (301), and a swing arm (303) connected to the rotating shaft (302). It also includes a traction roller (304) rotatably mounted on the conveying bracket (301) and a pressure roller (305) rotatably mounted on the swing arm (303). The rotating shaft (302), the traction roller (304), and the pressure roller (305) are all parallel to the pay-off reel (200). The pressure roller (305) is connected to the end of the swing arm (303) far from the rotating shaft (302) and is lapped on the traction roller (304) by its own weight to cooperate with the traction roller (304) to clamp and convey the target packaging film; A cutting assembly, distributed on both sides of the conveying assembly with the pay-off reel (200) and used for cutting the target packaging film.

2. The packaging film conveying and cutting device according to claim 1, characterized in that: The conveying assembly further includes a first servo motor (306), a driving gear (307) connected to the end of the traction roller (304), and a driven gear (308) connected to the end of the pressure roller (305); The driving gear (307) is also connected to the output end of the first servo motor (306) and can be driven by the first servo motor (306), and the driven gear (308) and the driving gear (307) form a transmission pair.

3. The packaging film conveying and cutting device according to claim 1, characterized in that: The conveying assembly further includes a limit bolt (309) threadedly connected to the swing arm (303); The limit bolt (309) penetrates through the swing arm (303) and its end abuts against the conveying bracket (301).

4. The packaging film conveying and cutting device according to claim 1, characterized in that: The conveying assembly further includes a handle (310) rotatably mounted on the conveying bracket (301) and a rotating block (311) connected to the handle (310) and capable of being driven by the handle (310) to rotate relative to the conveying bracket (301); The rotation path of the rotating block (311) interferes with the swing path of the swing arm (303) so that the swing arm (303) can swing relative to the rotating shaft (302) during the rotation of the rotating block (311) and make the pressure roller (305) and the traction roller (304) approach or move away from each other.

5. The packaging film conveying and cutting device according to claim 1, characterized in that: The conveying assembly further includes a cursor sensor (312) connected to the conveying bracket (301) and used for detecting the cursor position on the target packaging film.

6. The packaging film conveying and cutting device according to any one of claims 1-5, characterized in that: The cutting assembly includes a shearing bracket (401) connected to the machine frame platen (100), a fixed knife (402) and a moving knife (403) mounted on the shearing bracket (401) and capable of approaching or separating from each other, and further includes an adjusting mechanism drivingly connected to the shearing bracket (401) and capable of moving the shearing bracket (401) closer to or farther from the conveying assembly; The adjusting mechanism includes a connecting plate (404) and a bottom foot plate (405) connected to the shearing bracket (401), and further includes a nut seat (406) connected to the connecting plate (404), a base (407) connected to the machine frame platen (100), and a screw rod (408) rotatably mounted on the base (407) and threadedly connected to the nut seat (406). The shearing bracket (401) is detachably connected to the machine frame platen (100) through the bottom foot plate (405), and a long slot (409) parallel to the screw rod (408) is provided on the bottom foot plate (405).

7. The packaging film conveying and cutting device according to claim 6, wherein: The cutting assembly further includes a second servo motor (410) mounted on the shearing bracket (401), an eccentric disc (411) connected to the output end of the second servo motor (410), a connecting rod (412) with two ends respectively hinged to the eccentric disc (411) and the moving knife (403), and a linear guide (413) connected to the shearing bracket (401); The moving knife (403) is slidably connected to the linear guide (413) and can be guided by the linear guide (413) for sliding.

8. The packaging film conveying and cutting device according to claim 7, wherein: The cutting assembly further includes a cover plate (414) arranged at a laminated interval with the fixed knife (402), and the conveying assembly further includes a film guiding plate (313) connected to the conveying bracket (301) and extending close to the film feeding reel (200) to support the target packaging film; At least a part of the film guiding plate (313) extends into the interval between the fixed knife (402) and the cover plate (414), and a hollow (314) for the pressing roller (305) to abut against the traction roller (304) is provided on the film guiding plate (313).

9. The packaging film conveying and cutting device according to claim 8, wherein: The cutting assembly further includes a support (415) connected to the shearing bracket (401) and a material guiding block (416) laminated on the support (415); The material guiding block (416) is arranged at an interval from the cover plate (414) along the feeding direction of the conveying assembly and forms an avoidance interval for the moving knife (403) to pass through. A film outlet channel (417) facing the interval between the fixed knife (402) and the cover plate (414) is formed by the cooperation between the material guiding blocks (416).

10. The packaging film conveying and cutting device according to claim 9, wherein: The film outlet channel (417) forms a tapered port with the large end facing the gap between the fixed knife (402) and the cover plate (414).

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