Film unwinding mechanism of a film packaging machine

Abstract

This utility model relates to the field of film packaging, specifically disclosing a film unwinding mechanism for a film packaging machine. The mechanism includes a frame with a mounting plate on one side. The frame has a support column for holding the film roll. A fixing plate is located on the side of the frame away from the support column, and a cutting assembly is provided on the fixing plate for cutting the film. A through-hole is provided on the fixing plate for the film to pass through. The cutting assembly includes a drive component that drives a push plate. A cutter is located near the through-hole to cut the film passing through it. Driven by the transmission mechanism, not only can large items be quickly wrapped, but after wrapping, the motor drives the push plate and cutter via a cam linkage to automatically cut the film. This prevents the film from electrostatically sticking at the cut point and improves the efficiency of continuous wrapping.

Description

Technical Field

[0001] This utility model belongs to the technical field of film packaging equipment, and in particular relates to a film unwinding mechanism of a film packaging machine. Background Technology

[0002] Currently, most small film baling machines on the market use a top-pressure type. The goods to be baled are placed on a rotating turntable below, and a pressure plate above presses the goods firmly. A motor drives the turntable and the goods to rotate, achieving automatic film baling. After baling, the film is usually cut manually or with manual assistance. Manual cutting is not only inefficient, but also, because the film is thin, it tends to shrink at the cut point, causing the cut parts to stick together. This makes it difficult to organize in subsequent baling processes, affecting baling efficiency during repeated baling. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the present invention aims to provide a film unwinding mechanism for a film packaging machine that automatically cuts the film after packaging, thus solving the problems of the prior art.

[0004] This invention provides the following technical solution:

[0005] A film unwinding mechanism for a film baling machine includes a frame, with a mounting plate on one side of the frame;

[0006] The frame is equipped with supports for holding film rolls;

[0007] A fixing plate is provided on the side of the frame away from the support column, and a cutting component is provided on the fixing plate to cut the film;

[0008] The mounting plate has through holes for the membrane to pass through;

[0009] The cutting assembly includes a drive unit that drives a push plate. The push plate is equipped with a cutter that is positioned close to the through hole to cut the film passing through the through hole.

[0010] Preferably, the driving component is driven by a cam, the cam is rotatably connected to a connecting rod, and a push plate is rotatably connected to the other side of the connecting rod. The push plate is provided with at least one set of sliding components, and the push plate is slidably connected to the fixed plate through the sliding components.

[0011] Preferably, the sliding assembly includes a slider and a slide rail that are matched for sliding, the slider being connected to a push plate and the slide rail being connected to a fixed plate.

[0012] Preferably, the push plate is connected to the cutter on the side near the through hole, and the cutter is provided with a pad on the cutting side.

[0013] Preferably, a base plate is connected to the bottom of the side of the frame away from the push plate, and a folding plate is connected to the top of the side of the frame away from the push plate. The base plate and the folding plate are correspondingly arranged. The support column is arranged between the base plate and the folding plate. The support column is a hollow structure and is inserted into the plug rod arranged on the folding plate.

[0014] Preferably, a guide roller is provided on the side of the frame away from the fixed plate, and the guide roller is located close to the through hole. The guide roller is used for guiding and supporting the film.

[0015] Preferably, the mounting plate is connected to the transmission mechanism, and the transmission mechanism drives the film unwinding mechanism to move.

[0016] Preferably, the driving component is a motor.

[0017] Preferably, the mounting plate is connected to the slider of the transmission mechanism, and the motor drives the toothed belt and the slider, thereby driving the mounting plate and the film unwinding mechanism to slide up and down.

[0018] Preferably, the housing sidewall of the transmission mechanism is provided with a through groove, and the mounting plate is disposed in the through groove and slides within the through groove.

[0019] Preferably, the connecting rod is provided with fisheye connectors at both ends, and the connecting rod is rotatably connected to the cam through the fisheye connectors, and the connecting rod is rotatably connected to the pin on the push plate through the fisheye connectors.

[0020] Preferably, the frame is provided with a bracket, on which an optical fiber sensor is installed; the bracket has a longitudinal through groove, the bracket is slidably disposed in the through groove, and the bracket is fixed in the through groove with bolts.

[0021] Compared with the prior art, the present invention has the following beneficial effects:

[0022] The present invention discloses a film unwinding mechanism for a film packaging machine. Driven by a transmission mechanism, it can not only quickly wrap large items, but also automatically cut the film after wrapping by a motor driving a push plate and a cutter through a cam linkage. This not only prevents the film from electrostatically sticking at the cut point, but also improves the efficiency of continuous wrapping. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the film unwinding mechanism of this utility model. Figure 1 .

[0025] Figure 2 This is a schematic diagram of the film unwinding mechanism of this utility model. Figure 2 .

[0026] Figure 3 This is a schematic diagram of the motor mounting structure of the film unwinding mechanism of this utility model.

[0027] Figure 4 This is a schematic diagram of the fixing plate structure of the film unwinding mechanism of this utility model.

[0028] Figure 5 This is a schematic diagram of the overall structure of the packing machine. Detailed Implementation

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0030] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0031] Furthermore, in this invention, the use of terms such as "first" and "second" is for descriptive purposes only and does not specifically refer to any order or sequence, nor is it intended to limit the invention. They are merely used to distinguish components or operations described using the same technical terms and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the technical solutions and features of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, such a combination should be considered non-existent and not within the scope of protection claimed by this invention.

[0032] refer to Figure 1-4A film unwinding mechanism for a film packaging machine includes a frame with a mounting plate 46 on one side. The frame has a support column 44 for holding the film roll. A fixing plate 417 is provided on the side of the frame away from the support column 44. A cutting component is provided on the fixing plate 417 for cutting the film. A through hole 413 is provided on the fixing plate 417 for the film to pass through. The cutting component includes a drive unit, which is a motor 47. The motor can be a stepper motor or a servo motor. The drive unit drives a push plate 410. A cutter 411 is provided on the push plate 410. The cutter 411 is positioned close to the through hole 413 to cut the film passing through the through hole 413.

[0033] A cam 48 is driven by a drive component, and a connecting rod 49 is rotatably connected to the cam 48. A push plate 410 is rotatably connected to the other side of the connecting rod 49. The push plate 410 is provided with at least one set of sliding components, and the push plate 410 is slidably connected to the fixed plate 417 through the sliding components. The sliding components include a slider 415 and a slide rail 414 that are matched and slidably configured. The slider 415 is connected to the push plate 410, and the slide rail 414 is connected to the fixed plate 417.

[0034] The push plate 410 is connected to the cutter 411 on the side near the through hole 413. The cutter 411 is provided with a pad 412 on the cutting side. The pad 412 is made of polyurethane and protects the cutter 411.

[0035] A base plate 42 is connected to the bottom of the side of the frame away from the push plate 410, and a folding plate 43 is connected to the top of the side of the frame away from the push plate 410. The base plate 42 and the folding plate 43 are correspondingly arranged. A support column is arranged between the base plate 42 and the folding plate 43. The support column is a hollow structure and is inserted into the insertion rod provided on the folding plate 43. A guide roller 45 is provided on the side of the frame away from the fixed plate 417. The guide roller 45 is arranged close to the through hole 413 and is used for guiding and supporting the film.

[0036] The mounting plate 46 is connected to the transmission mechanism 3, which drives the film unwinding mechanism 4 to move. The mounting plate 46 is connected to the slider 415 of the transmission mechanism 3, and the motor drives the toothed belt and the slider 415, thereby causing the mounting plate 46 and the film unwinding mechanism 4 to slide up and down. The side wall of the housing of the transmission mechanism 3 is provided with a through groove, and the mounting plate 46 is set in the through groove and slides in the through groove.

[0037] The connecting rod 49 is provided with fisheye connectors at both ends. The connecting rod 49 is rotatably connected to the cam 48 through the fisheye connectors, and the connecting rod 49 is rotatably connected to the pin on the push plate 410 through the fisheye connectors.

[0038] The frame is equipped with a bracket 416, on which an optical fiber sensor is mounted; the bracket 416 has a longitudinal through groove, the bracket 416 is slidably disposed in the through groove, and bolts are provided to fix the bracket 416 to the through groove.

[0039] As one possible implementation method, refer to Figure 5 The packaging process control flow of the packaging machine includes: pressure plate descent stage → pressure detection stage → turntable 2 rotation stage → film unwinding mechanism rising stage → film breakage detection stage → reset stage. Each stage is executed by the controller in the order of the preset program. The packaging control logic is as follows: 1. Start signal trigger; 2. Photoelectric sensor detects goods; 3. Motor 47 drives the pressure plate to descend; 4. After spring compression, the proximity switch feeds back a stop signal; 5. Turntable 2 motor starts; 6. Film unwinding mechanism rises accordingly; 7. Fiber optic sensor detects whether the top of the box has been reached; 8. Film unwinding mechanism 4 performs a cutting action; 9. All mechanisms reset. The electrical connection logic is as follows: [PLC]-->[motor driver]-->[motor]; [PLC]<--[photoelectric sensor]; [PLC]<--[limit switch]; [PLC]-->[relay]-->[film unwinding mechanism motor]. Specifically, the goods to be packaged are placed on turntable 2, the switch is turned on, and the motor of transmission mechanism 3 drives the toothed belt, which in turn drives the pressure rod and pressure plate to fix the goods to be packaged on turntable 2 of base frame 1. The film is led out through roller 45 and through hole 413 and wrapped around the goods at least once. The motor 47 of turntable 2 is started, and the motor 47 drives the goods to rotate, automatically wrapping the film around the goods to achieve packaging. During the automatic wrapping of the film, transmission mechanism 3 drives film unwinding mechanism 4 to move slowly upward, wrapping the film around the goods from top to bottom. A fiber optic sensor (model Keyence FS-N11N fiber optic sensor) is installed on the bracket 416 of film unwinding mechanism 4. The fiber optic sensor is set vertically to the goods. During the wrapping process, the goods are always... Within the sensing range of the fiber optic sensor, as the film unwinding mechanism 4 moves upward, the fiber optic sensor also moves upward. When the same horizontal plane of the fiber optic sensor separates from the goods, meaning the goods are no longer within the illumination range of the fiber optic sensor, the fiber optic sensor sends a stop command to the motor of the transmission mechanism 3 to the controller. The film unwinding mechanism 4 stops moving, and the motor 47 of the film unwinding mechanism 4 is started. The motor 47 drives the push plate 410 to move via the cam 48 and connecting rod 49. The cutter 411 on the push plate 410 cuts the film. It should be understood that because the film is subjected to a certain tension when it is wrapped, the width of the cutter 411 is less than the width of the film. The cutter 411 cuts a small opening in the film, and the film will automatically break under tension. After the film is cut, the reset switch is activated, and the transmission mechanism 3 drives the film unwinding mechanism 4 to reset.

[0040] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention can have various modifications and variations; any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A film unwinding mechanism for a film packaging machine, characterized in that, Includes a frame (41), and a mounting plate (46) is provided on one side of the frame (41); The frame (41) is provided with a support (44) for placing the film roll; A fixing plate (417) is provided on the side of the frame (41) away from the support (44), and a cutting assembly is provided on the fixing plate (417) for cutting the film; The fixing plate (417) is provided with a through hole (413) for the membrane to pass through; The cutting assembly includes a drive unit that drives a connecting push plate (410). The push plate (410) is provided with a cutter (411). The cutter (411) is positioned close to the through hole (413) to cut the film passing through the through hole (413).

2. The film unwinding mechanism of a film packaging machine according to claim 1, characterized in that, The driving component is driven by a cam (48), which is rotatably connected to a connecting rod (49). The other side of the connecting rod (49) is rotatably connected to a push plate (410). The push plate (410) is provided with at least one set of sliding components, and the push plate (410) is slidably connected to the fixed plate (417) through the sliding components.

3. The film unwinding mechanism of a film packaging machine according to claim 2, characterized in that, The sliding assembly includes a slider (415) and a slide rail (414) with matching sliding settings. The slider (415) is connected to the push plate (410), and the slide rail (414) is connected to the fixed plate (417).

4. The film unwinding mechanism of a film packaging machine according to claim 3, characterized in that, The push plate (410) is connected to the cutter (411) on the side near the through hole (413), and the cutter (411) is provided with a pad (412) on the cutting side.

5. The film unwinding mechanism of a film packaging machine according to claim 2, characterized in that, A base plate (42) is connected to the bottom of the side of the frame (41) away from the push plate (410), and a folding plate (43) is connected to the top of the side of the frame (41) away from the push plate (410). The base plate (42) and the folding plate (43) are arranged correspondingly. The support column (44) is arranged between the base plate (42) and the folding plate (43). The support column (44) is a hollow structure. The support column (44) is inserted into the plug rod provided on the folding plate (43).

6. The film unwinding mechanism of a film packaging machine according to claim 2, characterized in that, A guide roller (45) is provided on the side of the frame (41) away from the fixed plate (417). The guide roller (45) is located near the through hole (413) and is used for guiding and supporting the film.

7. The film unwinding mechanism of a film packaging machine according to claim 1, characterized in that, The mounting plate (46) is connected to the transmission mechanism (3), and the transmission mechanism (3) drives the film unwinding mechanism (4) to move.

Images