Plastic film cutting device

Abstract

The utility model discloses a plastic film cutting device which comprises a conveying frame, a cutting frame is arranged at the upper end of the conveying frame, a cutting mechanism is arranged on the cutting frame, conveying rollers are rotationally arranged in the conveying frame, the conveying rollers are arranged on the front side and the rear side of the cutting frame, and the cutting mechanism comprises a cutting air cylinder, a cutting board, a cutting knife, an abutting air cylinder, an abutting roller and a supporting plate. The cutting air cylinder is arranged on the cutting frame, the output end of the cutting air cylinder faces downwards and is connected with the cutting board, the lower end of the cutting board is provided with a cutting knife, an abutting roller is arranged below the cutting knife, and a first through groove matched with the cutting knife is formed in the abutting roller; the two abutting air cylinders are arranged on the portions, at the two ends of the abutting roller, of the cutting frame respectively, the telescopic ends of the abutting air cylinders face downwards and are connected with the roller shafts at the two ends of the abutting roller, the supporting plate is located in the portion, below the abutting roller, of the conveying frame, and an arc-shaped groove is formed in the upper surface of the supporting plate. According to the utility model, the conditions of warping and wrinkling are avoided during cutting, and the cutting quality is improved.

Description

Technical Field

[0001] This utility model relates to the field of plastic film production technology, and specifically to a plastic film cutting device. Background Technology

[0002] Plastic film is a commonly used packaging material in the modern packaging industry. It is usually made of polyethylene, polypropylene, and other resins. Plastic film has been widely used in food, medicine, chemical and other fields, bringing great convenience to people's lives.

[0003] Cutting devices are needed in the production of plastic film to cut it to different lengths. A search revealed a utility model patent with application number "202420132770.0" that discloses a fully automatic plastic film cutting device. This device includes an operating platform with a conveying mechanism on its top left and a processing frame fixedly connected to its top right. A first electric push rod and a second electric push rod are fixedly mounted on the top of the processing frame, with the second electric push rod positioned between the two first electric push rods. The telescopic ends of both the first and second electric push rods extend through the processing frame, and a connecting plate is fixedly connected to the telescopic end of the first electric push rod. This utility model uses fixing mechanisms on both sides of the cutting mechanism to secure the plastic film on both sides of the cutting process, preventing the film from warping, wrinkling, or shifting laterally during cutting, which can lead to rough edges and affect cutting accuracy. However, the fixing mechanism of this device is overly complex; it only presses vertically and does not extend the plastic film to both sides, still resulting in warping and wrinkling, affecting the final cutting effect. Utility Model Content

[0004] The purpose of this invention is to provide a plastic film cutting device to solve the problems existing in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a plastic film cutting device, including a conveyor frame, a cutting frame at the upper end of the conveyor frame, a cutting mechanism on the cutting frame, a conveyor roller rotatably arranged inside the conveyor frame, the conveyor roller being arranged on the front and rear sides of the cutting frame, the cutting mechanism including a cutting cylinder, a blade plate, a cutting blade, a pressing cylinder, a pressing roller and a support plate, the cutting cylinder being arranged on the cutting frame, the output end of the cutting cylinder facing downward and connected to the blade plate, the cutting blade being arranged at the lower end of the blade plate, the pressing roller being arranged below the cutting blade, the pressing roller being provided with a first through groove matching the cutting blade; two pressing cylinders are provided, respectively arranged on the cutting frame at both ends of the pressing roller, the telescopic ends of the pressing cylinders facing downward and connected to the roller shafts at both ends of the pressing roller, the support plate being located inside the conveyor frame below the pressing roller, the upper surface of the support plate being provided with an arc-shaped groove, the bottom end of the arc-shaped groove being provided with a second through groove matching the cutting blade.

[0006] As a preferred embodiment of this technical solution, a guide rod is provided on the blade plate, and a through hole matching the guide rod is provided on the cutting frame, wherein the guide rod slides up and down within the through hole.

[0007] As a preferred embodiment of this technical solution, two guide rods are provided, symmetrically arranged on both sides of the cutting cylinder.

[0008] As a preferred embodiment of this technical solution, the inner walls on both sides of the cutting frame are provided with sliding grooves, and the roller shafts at both ends of the pressure roller slide within the sliding grooves.

[0009] Compared with the prior art, the pressure cylinder of this utility model drives the pressure roller to press down, and the pressure roller presses the plastic film between the conveying rollers into the arc-shaped groove. The roller surface shape of the pressure roller allows the plastic film to stretch and tighten. The cutting cylinder drives the cutting blade to cut the plastic film through the first through groove. The cutting of this utility model will not cause curling or wrinkling, and the cutting quality is improved. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the main structure of this utility model.

[0011] Figure 2 This is a top view of the structure of this utility model.

[0012] Figure 3 This is a side view of the structure of this utility model.

[0013] Figure 4 This utility model Figure 2 AA view.

[0014] Figure 5 This is a three-dimensional structural diagram of the present invention.

[0015] Figure 6 This is a schematic diagram of the pressure roller structure of this utility model.

[0016] In the diagram: 1. Conveyor frame; 2. Cutting frame; 3. Conveyor roller; 4. Cutting cylinder; 5. Blade plate; 6. Cutting blade; 7. Pressing cylinder; 8. Pressing roller; 8.1. First through groove; 8.2. Roller shaft; 9. Support plate; 9.1. Arc-shaped groove; 9.2. Second through groove; 10. Guide rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0018] Please see Figure 1-6 This utility model provides a plastic film cutting device, including a conveyor frame 1, which is a U-shaped frame with its opening facing upwards. A cutting frame 2 is set at the upper end of the conveyor frame 1. The cutting frame 2 is a gantry frame, and a cutting mechanism is set on the cutting frame 2. A conveyor roller 3 is rotatably arranged inside the conveyor frame 1, and the conveyor roller 3 is located on the front and rear sides of the cutting frame 2. The conveyor roller 3 is used to convey plastic film. The cutting mechanism includes a cutting cylinder 4, a blade plate 5, a cutting blade 6, a pressing cylinder 7, a pressing roller 8, and a support plate 9. The cutting cylinder 4 is set on the cutting frame 2, and the output end of the cutting cylinder 4 faces downwards and is connected to the blade plate 5. The blade plate 5 is set on the cutting frame. Below the upper end of 2, a cutting blade 6 is set at the lower end of the blade plate 5, and a pressure roller 8 is set below the cutting blade 6. The pressure roller 8 is provided with a first through groove 8.1 that matches the cutting blade 6. Two pressure cylinders 7 are provided, respectively set on the cutting frame 2 at both ends of the pressure roller 8. The telescopic end of the pressure cylinder 7 faces downward and is connected to the roller shaft 8.2 at both ends of the pressure roller 8. The support plate 9 is located in the conveyor frame 1 below the pressure roller 8. An arc-shaped groove 9.1 is provided on the upper surface of the support plate 9. The bottom end of the arc-shaped groove 9.1 is lower than the upper roller surface of the conveyor roller 2. The bottom end of the arc-shaped groove 9.1 is provided with a second through groove 9.2 that matches the cutting blade 6.

[0019] In a specific implementation of this utility model, a guide rod 10 is provided on the blade 5, and a through hole matching the guide rod 10 is provided on the cutting frame 22. The guide rod 10 extends upward and passes through the through hole, and slides up and down within the through hole under the drive of the cutting cylinder 4. Two guide rods 10 are provided, symmetrically arranged on both sides of the cutting cylinder 4. The plastic film is conveyed from one conveying roller 3 to another conveying roller 3, and the length direction of the conveying roller 3, the pressure roller 8, and the blade 5 is the width direction of the conveying frame 1. Sliding grooves are provided on the inner walls of both sides of the cutting frame 2, and the roller shafts 8.2 at both ends of the pressure roller 8 slide within the sliding grooves.

[0020] In operation, the external mechanism of this invention transports the plastic film from one conveying roller to another. When cutting is required, the conveying stops, and the pressure cylinder drives the pressure roller downwards. The pressure roller presses the plastic film below into the arc-shaped groove. The cutting cylinder drives the cutting blade on the blade plate to slide downwards in the first through groove to cut the plastic film and insert it into the second through groove. At this time, the blade plate is still above the first through groove and will not enter the first through groove. After cutting is completed, the cutting cylinder drives the cutting blade to reset, and the pressure cylinder drives the pressure roller to reset.

[0021] Finally, it should be noted that the above-described embodiments are merely specific implementations of this utility model, used to illustrate the technical solution of this utility model, and not to limit it. The protection scope of this utility model is not limited thereto. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that any person skilled in the art can still modify or easily conceive of changes to the technical solutions described in the foregoing embodiments, or make equivalent substitutions for some of the technical features, within the technical scope disclosed in this utility model. These modifications, changes, or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be covered within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A plastic film cutting device, comprising a conveyor frame, a cutting frame disposed at the upper end of the conveyor frame, a cutting mechanism disposed on the cutting frame, and conveying rollers rotatably disposed inside the conveyor frame, the conveying rollers being disposed on the front and rear sides of the cutting frame, characterized in that: The cutting mechanism includes a cutting cylinder, a blade plate, a cutting blade, a pressing cylinder, a pressing roller, and a support plate. The cutting cylinder is mounted on the cutting frame, with its output end facing downwards and connected to the blade plate. The cutting blade is mounted at the lower end of the blade plate, and the pressing roller is mounted below the cutting blade. The pressing roller has a first through groove that matches the cutting blade. Two pressing cylinders are provided, each mounted on the cutting frame at both ends of the pressing roller. The telescopic ends of the pressing cylinders face downwards and are connected to the roller shafts at both ends of the pressing roller. The support plate is located in the conveyor frame below the pressing roller. An arc-shaped groove is provided on the upper surface of the support plate, and a second through groove that matches the cutting blade is provided at the bottom of the arc-shaped groove.

2. The plastic film cutting apparatus according to claim 1, wherein: The blade plate is provided with a guide rod, and the cutting frame is provided with a through hole that matches the guide rod. The guide rod slides up and down in the through hole.

3. The plastic film cutting apparatus of claim 2, wherein: Two guide rods are provided, symmetrically positioned on both sides of the cutting cylinder.

4. The plastic film cutting apparatus of claim 1, wherein: The inner walls on both sides of the cutting frame are provided with sliding grooves, and the roller shafts at both ends of the pressure roller slide in the sliding grooves.

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