Bagging and shearing device of roll film packaging machine

Abstract

The utility model provides a roll film packaging machine bag dividing and shearing device which comprises a fixed cutter and a movable cutter which are oppositely arranged in the horizontal direction, the fixed cutter is fixedly arranged, a stamping air cylinder is further arranged at the end, away from the fixed cutter, of the movable cutter, the movable cutter comprises a cutter head and a pressing piece which are arranged side by side, and the cutter head is fixedly connected with the output end of the stamping air cylinder. The pressing piece is elastically connected with the output end of the stamping air cylinder. The movable cutter comprises the cutter head and the pressing piece which are arranged in parallel, and the pressing piece is elastically connected with the output end of the stamping air cylinder, so that when the stamping air cylinder drives the movable cutter to move towards the fixed cutter, the pressing piece firstly makes contact with the fixed cutter, and a plastic film is clamped between the pressing piece and the fixed cutter to be fixed; in this way, the plastic film cannot be stretched and deformed upwards to achieve buffering, the tool bit can cut the plastic film more powerfully, the cutting success rate is increased, and the probability of partial connection between packaging bags is reduced.

Description

Technical Field

[0001] This utility model relates to the field of roll film packaging machine technology, and in particular to a bag-splitting and cutting device for a roll film packaging machine. Background Technology

[0002] Packaging machines are mechanical devices used to wrap products in packaging materials for protection, storage, or transportation. They are widely used in many industries such as food, beverage, pharmaceuticals, cosmetics, and chemicals. Roll wrapping machines, on the other hand, use plastic film to roll up plastic film into bags to package powders and liquids.

[0003] The main advantage of roll film packaging machines in the packaging industry lies in cost savings throughout the entire packaging process. Roll film packaging eliminates the need for packaging manufacturers to perform any edge sealing; only a one-time sealing operation is required at the manufacturing site. Therefore, packaging manufacturers only need to perform the printing operation, and transportation costs are also reduced due to the roll-based supply. The advent of roll film packaging machines has simplified the entire plastic packaging process into three main steps: printing, transportation, and sealing, greatly simplifying the packaging process and reducing costs across the industry, making it the preferred choice for small packaging.

[0004] Currently, with technological advancements, roll wrapping machines are no longer limited to processing small bags; they can also handle larger bags with greater width. However, traditional roll wrapping machines still present certain challenges when applied to large packaging. The core issue is that as the bag width increases, the cutting mechanism requires a wider blade. Since plastic film itself has strong extensibility, the increased blade width leads to a larger contact area between the blade and the film, further reducing the actual cutting pressure. This can result in incomplete cutting due to the buffering effect of the film's stretching and deformation, leaving some areas of the film still connected rather than completely severed. Utility Model Content

[0005] To address the shortcomings of existing technologies, this utility model provides a bag-splitting and cutting device for a roll film packaging machine. This device solves the problem in existing technologies where the increased blade width leads to poor cutting performance for highly elastic plastic films, resulting in partial connection between adjacent packaging bags.

[0006] According to an embodiment of this utility model, a bag-slitting and cutting device for a roll film packaging machine is provided. The cutting device is correspondingly arranged at the bottom of the roll film packaging machine and includes a fixed blade and a moving blade arranged opposite each other in the horizontal direction. The fixed blade is fixedly arranged so that the roll film passes vertically through the edge of the fixed blade corresponding to the moving blade. A stamping cylinder is also provided at the end of the moving blade away from the fixed blade, thereby driving the moving blade to move in the horizontal plane, so that the moving blade moves closer to or away from the fixed blade. The moving blade includes a blade head and a pressing member arranged side by side. The blade head is fixedly connected to the output end of the stamping cylinder, and the pressing member is elastically connected to the output end of the stamping cylinder. The end of the stamping member is closer to the fixed blade than the blade head, so that when the moving blade moves toward the fixed blade, the pressing member contacts the fixed blade first, and then the blade head contacts the fixed blade.

[0007] Furthermore, the fixed blade includes upper and lower opposing contact plates, and a recessed hollow portion is provided between the contact plates.

[0008] Furthermore, the moving blade includes a vertically arranged positioning plate, which is fixedly connected to the output end of the stamping cylinder. Two connecting plates arranged side by side and a fixing plate arranged between the connecting plates are fixedly connected to the end of the positioning plate near the fixed blade. The pressing member is elastically connected to the connecting plate, and the blade head is fixedly connected to the fixing plate, so that the blade head is sandwiched in the middle by the two plate-shaped pressing members. The pressing members and the contact plate are arranged opposite each other, so that the blade head corresponds to the hollow part.

[0009] Furthermore, a sleeve is provided at one end of the pressing component corresponding to the connecting plate. The sleeve is slidably fitted onto the outside of the connecting plate, and several springs are arranged in parallel between the end of the connecting plate and the inner end face of the sleeve.

[0010] Furthermore, a sponge pad is provided on the opposite end face of the pressing member and the contact plate.

[0011] Furthermore, the cutter head includes a plurality of tips spaced apart in the horizontal direction, the tips having different lengths and sharpnesses, and adjacent tips having irregularly curved connecting portions.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In this invention, the moving blade includes a blade head and a pressing member arranged in parallel. The pressing member is elastically connected to the output end of the stamping cylinder. When the moving blade moves toward the fixed blade, the pressing member first contacts the fixed blade, and then the blade head contacts the fixed blade. In this way, when the stamping cylinder drives the moving blade toward the fixed blade, the pressing member contacts the fixed blade first, thereby clamping the plastic film between them and fixing it. This prevents the plastic film from being stretched and deformed upwards, thus achieving buffering. This allows the blade head to cut the plastic film more forcefully, improving the cutting success rate and reducing the probability of partial connection between packaging bags. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the installation position according to an embodiment of the present invention.

[0015] Figure 2 This is a detailed schematic diagram of the fixed blade and the moving blade in the embodiment of this utility model.

[0016] Figure 3 This is a schematic diagram of the blade head structure of the moving blade in an embodiment of this utility model.

[0017] In the above attached figures: 1. Fixed blade; 2. Mounting base; 3. Moving blade; 4. Stamping cylinder; 5. Sponge pad; 6. Pointed tip; 7. Connecting part; 11. Contact plate; 12. Hollowed-out part; 31. Blade head; 32. Pressing part; 33. Positioning plate; 34. Connecting plate; 35. Fixing plate; 36. Sleeve; 37. Spring. Detailed Implementation

[0018] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0019] like Figure 1 As shown in the figure, this utility model embodiment proposes a bag-slitting and cutting device for a roll film packaging machine. The cutting device is correspondingly installed at the bottom of the roll film packaging machine and includes a fixed blade 1 and a moving blade 3 arranged opposite each other in the horizontal direction. The fixed blade 1 is fixedly installed by a mounting base 2, so that the roll film passes vertically through the edge of the fixed blade 1 corresponding to the moving blade 3. The moving blade 3 is also provided with a stamping cylinder 4 at the end away from the fixed blade 1, thereby driving the moving blade 3 to move in the horizontal plane, so that the moving blade 3 moves closer to or further away from the fixed blade 1.

[0020] like Figure 2 As shown, in the specific design, the fixed blade 1 includes two opposing contact plates 11, with a recessed perforation 12 between them. The moving blade 3 includes a blade head 31 and a pressing member 32 arranged side by side. The blade head 31 is fixedly connected to the output end of the stamping cylinder 4, and the pressing member 32 is elastically connected to the output end of the stamping cylinder 4. The end of the pressing member is closer to the fixed blade 1 than the blade head 31, so that when the moving blade 3 moves toward the fixed blade 1, the pressing member 32 contacts the fixed blade 1 first, followed by the blade head 31. Thus, when the stamping cylinder 4 drives the moving blade 3 to move toward the fixed blade 1, the pressing member 32 contacts the fixed blade 1 first, thereby clamping and fixing the plastic film between them. This prevents the plastic film from being stretched and deformed upwards, thus providing cushioning. This allows the blade head 31 to cut the plastic film more forcefully, improving the cutting success rate and reducing the probability of partial connections between packaging bags.

[0021] In a further embodiment, the moving blade 3 includes a vertically arranged positioning plate 33, which is fixedly connected to the output end of the stamping cylinder 4. Two parallel connecting plates 34 and a fixing plate 35 positioned between the connecting plates 34 are fixedly connected to the end of the positioning plate 33 near the fixed blade 1. The pressing member 32 is elastically connected to the connecting plates 34, and the blade head 31 is fixedly connected to the fixing plate 35, so that the blade head 31 is sandwiched between the two plate-shaped pressing members 32. The pressing members 32 and the contact plate 11 are arranged vertically opposite each other, so that the blade head 31 corresponds to the hollowed-out portion 12. Thus, during each cutting operation, the two pressing members 32 and the contact plate 11 simultaneously clamp the plastic film, fixing both ends of the middle portion of the plastic film and keeping it under tension. Therefore, the plastic film is less prone to stretching and deformation, allowing the blade head 31 to better cut the plastic film.

[0022] Preferably, a sleeve 36 is provided at one end of the pressing member 32 corresponding to the connecting plate 34. The sleeve 36 is slidably fitted onto the outside of the connecting plate 34, and several springs 37 are arranged in parallel between the end of the connecting plate 34 and the inner end face of the sleeve 36. In this way, the springs 37 can provide a certain buffer and allow the pressing member 32 to return to its original position after processing. Preferably, a sponge pad 5 is also provided on the opposite end face of the pressing member 32 and the contact plate 11, so as to buffer the impact force between the fixed blade 1 and the moving blade 3, and can also better clamp the plastic film.

[0023] like Figure 3 As shown in this embodiment, the cutting head 31 further includes a plurality of tips 6 spaced apart in the horizontal direction. The tips 6 have different lengths and sharpnesses, and adjacent tips 6 are connected by irregularly curved connecting portions 7. The design of the tips 6 allows them to directly pierce the film, causing the film to lose its ability to deform and stretch under force, further increasing the cutting probability. The irregularly curved connecting portions 7 further enhance the cutting ability, avoiding the problem of insufficient pressure applied by a regular cutting head 31.

[0024] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A bagging and cutting device for a roll film packaging machine, characterized by: The shearing device is arranged at the bottom of the film winding packaging machine, and includes a fixed cutter and a movable cutter arranged opposite to each other in the horizontal direction. The fixed cutter is fixedly arranged so that the film vertically passes through the edge of the end of the fixed cutter corresponding to the movable cutter. The end of the movable cutter away from the fixed cutter is further provided with a punching cylinder, so as to drive the movable cutter to move in the horizontal plane, so that the movable cutter is close to or away from the fixed cutter. The movable cutter includes a cutter head and a pressing piece arranged side by side. The cutter head is fixedly connected between the output end of the punching cylinder. The pressing piece is elastically connected between the output end of the punching cylinder. The end of the pressing piece is closer to the fixed cutter than the cutter head, so that when the movable cutter moves towards the fixed cutter, the pressing piece first contacts the fixed cutter, and then the cutter head contacts the fixed cutter.

2. A bagging and cutting device for a roll film packaging machine as claimed in claim 1, characterized in that: The fixed cutter includes upper and lower contact plates. The contact plates are provided with recessed hollow portions.

3. A bagging and cutting device for a roll film packaging machine as defined in claim 2, characterized in that: The movable cutter includes a vertically arranged positioning plate. The positioning plate is fixedly connected with the output end of the punching cylinder. The end of the positioning plate close to the fixed cutter is fixedly connected with two upper and lower connecting plates and a fixed plate arranged between the connecting plates. The pressing piece is elastically connected with the connecting plate. The cutter head is fixedly connected with the fixed plate, so that the cutter head is clamped between the two plate-shaped pressing pieces. The pressing piece is arranged opposite to the contact plate in the vertical direction, so that the cutter head corresponds to the hollow portion.

4. A bagging and cutting device for a roll film packaging machine as defined in claim 3, characterized in that: The pressing piece is provided with a sleeve at one end of the connecting plate. The sleeve is slidably sleeved on the outside of the connecting plate. A plurality of springs are arranged in parallel between the end of the connecting plate and the inner end surface of the sleeve.

5. A bagging and cutting apparatus for a roll film packaging machine as defined in claim 2, wherein: The pressing piece and the opposite end surface of the contact plate are further provided with sponge gaskets.

6. A bagging and cutting device for a roll film packaging machine as defined in claim 1, characterized in that: The cutter head includes a plurality of sharp heads arranged at intervals in the horizontal direction. The sharp heads have different lengths and sharpness. Irregular arc-shaped connecting portions are arranged between adjacent sharp heads.

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