Cutting device for plastic bag

Abstract

A plastic bag notching device comprises a rack, a heat sealing cutting device and a notching device body, a first platform and a second platform are arranged on the rack, the second platform is located on the right side of the first platform and lower than the first platform, and the notching device body comprises a door-shaped support fixed to the two sides of the second platform. Three notching driving air cylinders are fixed to the upper end of the door-shaped support, the telescopic ends of the three notching driving air cylinders penetrate through the door-shaped support to be fixedly connected with a supporting plate, and the lower end of the supporting plate is fixedly connected with a mouth-shaped notching knife. And through the design of the sliding table, the sliding groove, the guide block, the guide groove and the like, the cutting and heat sealing device and the mechanical claw can accurately move and position, and the continuous improvement of the market for the quality and individuation requirements of plastic bags is met.

Description

Technical Field

[0001] The invention relates to the field of packaging bag processing, in particular to a cutting device for plastic bags. Background Art

[0002] As an indispensable material in modern life, plastic is widely used in the packaging industry, especially in the production of plastic bags. In the production process, after the plastic film is extruded, stretched, cooled and other processes, it is usually stored on a reel in a wound form for subsequent processing and transportation. However, when processing the plastic film into the final plastic bag product, it needs to go through a series of complex processes, including cutting, heat sealing and incision processing.

[0003] At present, most of the plastic bag cutting devices on the market remain at the semi-automatic level. These devices can usually only complete a single cutting operation, and cannot meet other key requirements in the plastic bag production process, such as film unfolding, precise cutting, and heat sealing. This single function not only limits production efficiency, but also increases the complexity and cost of manual operation.

[0004] Specifically, the existing cutting device often requires manual assistance during the cutting process to ensure the flatness and cutting accuracy of the film. At the same time, the cut film needs to be heat-sealed through additional equipment or processes to form a complete plastic bag structure. This decentralized processing flow not only increases time costs, but may also lead to unstable product quality.

[0005] In addition, as the market demand for plastic bag quality and personalization continues to increase, traditional cutting devices have been unable to meet the requirements of modern production in terms of flexibility, precision and efficiency. Therefore, the development of a plastic bag cutting device that can integrate multiple functions such as unfolding, cutting, and heat sealing has become an urgent problem to be solved in the current plastic packaging industry. Summary of the invention

[0006] The technical problem to be solved by the present invention is to provide a cutting device for a plastic bag.

[0007] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0008] A cutting device for plastic bags comprises a frame, a heat-sealing cutting device and a cutting device, wherein a first platform and a second platform are arranged on the frame, wherein the second platform is located on the right side of the first platform and is lower than the first platform, and the cutting device comprises a gate-shaped bracket fixed to both sides of the second platform, wherein three cutting drive cylinders are fixed to the upper end of the gate-shaped bracket, and the telescopic ends of the three cutting drive cylinders pass through the gate-shaped bracket and are fixedly connected to a support plate, and the lower end of the support plate is fixedly connected to a mouth-shaped cutting knife.

[0009] A cutting and heat-sealing device is provided above the first platform, and the cutting and heat-sealing device includes a heat-sealing knife and a cutting knife fixed to the left side of the heat-sealing knife. Both ends of the heat-sealing knife are fixedly connected to the slide, and the slide is located in the slide grooves on both sides of the frame. The top of the slide is fixedly connected to the telescopic end of the first telescopic cylinder.

[0010] A notch is provided on the right side of the first platform, and a mechanical claw is movable on the notch. The mechanical claw is engaged and released by a driving cylinder. The mechanical claw is fixed on a moving plate, and the moving plate is fixedly connected to moving blocks on both sides.

[0011] Second telescopic cylinders are provided at the upper ends of both sides of the second platform, and the telescopic ends of the second telescopic cylinders are fixedly connected to the moving blocks.

[0012] An integrally formed guide block is disposed at the lower end of the moving block, and guide grooves adapted to the guide block are disposed at the upper ends of both sides of the second platform.

[0013] Opposite placement holes are provided at the two ends of the left side of the frame, and a first extrusion device, a guide rod and a second extrusion device are provided on the right side of the placement hole. The first extrusion device and the second extrusion device both include an upper extrusion roller and a lower extrusion roller located below the upper extrusion roller, wherein one end of the upper extrusion roller is connected to the frame bearing, and the other end is connected to the output end of the motor through a pulley and a belt, and both ends of the lower extrusion roller are connected to the frame bearing.

[0014] A cross bar is also fixed on the upper left side of the first platform, and a photoelectric sensor is movably connected to the cross bar.

[0015] The placement hole is used for placing the reel.

[0016] The two ends of the guide rod are connected with the frame bearings.

[0017] The upper squeezing roller and the lower squeezing roller of the first squeezing device and the second squeezing device can drive the film to move forward.

[0018] The upper extrusion rollers in the first extrusion device and the second extrusion device have the same rotation direction.

[0019] Beneficial effects of the present invention:

[0020] The present invention realizes the integration of multiple functions such as unfolding, cutting, and heat sealing in the production process of plastic bags by integrating the heat-sealing cutting device and the incision device, greatly improves the production efficiency, and reduces the complexity and cost of manual operation.

[0021] The cutting and heat sealing device, mechanical claws, second telescopic cylinder and other components in the device are all automatically controlled by cylinders and motors, without the need for manual assistance, ensuring the flatness and cutting accuracy of the film while improving the stability of product quality.

[0022] Through the design of slides, slides, guide blocks and guide grooves, the cutting and heat sealing device and mechanical claws can be accurately moved and positioned, meeting the market's ever-increasing demand for plastic bag quality and personalization. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of the present invention.

[0024] Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention. DETAILED DESCRIPTION

[0025] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further explained below with reference to specific diagrams.

[0026] A cutting device for plastic bags comprises a frame 1, a heat-sealing cutting device and a cutting device, wherein the frame 1 is provided with a first platform 2 and a second platform 3, wherein the second platform 3 is located on the right side of the first platform and is lower than the first platform 2, and the cutting device comprises a gate-shaped bracket 23 fixed to both sides of the second platform, wherein three cutting drive cylinders 24 are fixed to the upper end of the gate-shaped bracket 23, and the telescopic ends of the three cutting drive cylinders 24 pass through the gate-shaped bracket 23 and are fixedly connected to a support plate 25, and the lower end of the support plate 25 is fixedly connected to a mouth-shaped cutting knife 26.

[0027] A cutting and heat-sealing device is provided above the first platform 2, and the cutting and heat-sealing device includes a heat-sealing knife 4 and a cutting knife 5 fixed to the left side of the heat-sealing knife 4. Both ends of the heat-sealing knife 4 are fixedly connected to a slide 6, and the slide 6 is located in a slide groove 7 on both sides of the frame. The top of the slide 6 is fixedly connected to the telescopic end of the first telescopic cylinder 8.

[0028] A notch is provided on the right side of the first platform 2, on which a mechanical claw 9 is movable. The mechanical claw 9 is engaged and released by a driving cylinder 10. The mechanical claw 9 is fixed on a moving plate 11, and the moving plate 11 is fixedly connected to moving blocks 12 on both sides.

[0029] Second telescopic cylinders 13 are provided at the upper ends of both sides of the second platform 3 , and the telescopic ends of the second telescopic cylinders 13 are fixedly connected to the moving blocks 12 .

[0030] An integrally formed guide block is disposed at the lower end of the moving block 12 , and guide grooves 14 adapted to the guide block are disposed at the upper ends of both sides of the second platform 3 .

[0031] Relative placement holes 15 are provided at both ends of the left side of the frame 1, and a first extrusion device, a guide rod 22 and a second extrusion device are provided on the right side of the placement hole 15. The first extrusion device and the second extrusion device both include an upper extrusion roller 16 and a lower extrusion roller 17 located below the upper extrusion roller 16, wherein one end of the upper extrusion roller 16 is connected to the bearing of the frame 1, and the other end is connected to the output end of the motor 18 through a pulley and a belt, and both ends of the lower extrusion roller 17 are connected to the bearing of the frame 1.

[0032] A cross bar 19 is fixed to the upper left side of the first platform 2 , and a photoelectric sensor 20 is movably connected to the cross bar 19 .

[0033] The placement hole 15 is used for placing the reel 21 .

[0034] Both ends of the guide rod 22 are connected to the frame 1 by bearings.

[0035] The upper squeezing roller 16 and the lower squeezing roller 17 of the first squeezing device and the second squeezing device can drive the film to move forward.

[0036] The upper extrusion rollers 16 in the first extrusion device and the second extrusion device have the same rotation direction.

[0037] The reel 21 containing the plastic bag film material is placed in the placement hole 15 on the left side of the frame 1.

[0038] Start the motor 18, the motor 18 drives the upper squeeze roller 16 in the first squeeze device and the second squeeze device to rotate through the pulley. Due to the close fit between the upper squeeze roller 16 and the lower squeeze roller 17, the film is stably unrolled from the reel 21 and conveyed forward along the direction of the guide rod 22.

[0039] The photoelectric sensor 20 is located at the upper left side of the first platform 2 to monitor the conveying state of the film in real time to ensure that the film is accurately aligned before reaching the cutting and heat-sealing position.

[0040] When the film is transported to the first platform 2, the first telescopic cylinder 8 is started, and its telescopic end pushes the slide 6 to move along the slide grooves 7 on both sides of the frame toward the film.

[0041] The movement of the slide 6 drives the heat sealing knife 4 and the cutting knife 5 to approach the film synchronously. The heat sealing knife 4 heats and presses the film to form a sealing edge; at the same time, the cutting knife 5 cuts the film during or after the heat sealing process, thereby completing the cutting and heat sealing operations of the plastic bag.

[0042] After the cutting and heat sealing are completed, the mechanical claw 9 drives the cylinder 10 to perform a gripping action to grab the cut and heat-sealed plastic bag.

[0043] At the same time, the second telescopic cylinder 13 is started, and its telescopic end pushes the moving block 12 and the moving plate 11 and the mechanical claw 9 fixed thereto to move rightward along the guide grooves 14 on both sides of the second platform 3.

[0044] The close fit between the guide block at the lower end of the moving block 12 and the guide groove 14 ensures the stability and accuracy of the mechanical claw 9 during the moving process.

[0045] When the mechanical claw 9 moves to the end or the designated position of the second platform 3, the driving cylinder 10 is released to release the plastic bag.

[0046] The three cutting drive cylinders 24 are started simultaneously, and the telescopic ends thereof push the support plate 25 and the mouth-shaped cutting knife 26 to move downward, so as to perform precise cutting processing on the plastic bag, thereby completing the cutting work of the plastic bag.

[0047] The door-shaped support 23 of the cutting device ensures the stability and accuracy of the cutting knife 26. At the same time, the synchronous operation of the three cutting drive cylinders 24 improves the consistency and efficiency of the cutting.

[0048] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A plastic bag cutting device, characterized in that: It includes a frame, a heat sealing cutting device and a cutting device. The frame is provided with a first platform and a second platform. The second platform is located on the right side of the first platform and is lower than the first platform. The cutting device includes a door-shaped bracket fixed to both sides of the second platform. Three cutting drive cylinders are fixed to the upper end of the door-shaped bracket. The telescopic ends of the three cutting drive cylinders pass through the door-shaped bracket and are fixedly connected to a support plate. The lower end of the support plate is fixedly connected to a mouth-shaped cutting knife.

2. A plastic bag cutting device according to claim 1, characterized in that: A cutting and heat-sealing device is provided above the first platform, and the cutting and heat-sealing device includes a heat-sealing knife and a cutting knife fixed to the left side of the heat-sealing knife. Both ends of the heat-sealing knife are fixedly connected to the slide, and the slide is located in the slide grooves on both sides of the frame. The top of the slide is fixedly connected to the telescopic end of the first telescopic cylinder.

3. A plastic bag cutting device according to claim 1, characterized in that: A notch is provided on the right side of the first platform, and a mechanical claw is movable on the notch. The mechanical claw is engaged and released by a driving cylinder. The mechanical claw is fixed on a moving plate, and the moving plate is fixedly connected to moving blocks on both sides.

4. A plastic bag cutting device according to claim 1, characterized in that: Second telescopic cylinders are provided at the upper ends of both sides of the second platform, and the telescopic ends of the second telescopic cylinders are fixedly connected to the moving blocks.

5. A plastic bag cutting device according to claim 1, characterized in that: An integrally formed guide block is disposed at the lower end of the moving block, and guide grooves adapted to the guide block are disposed at the upper ends of both sides of the second platform.

6. A plastic bag cutting device according to claim 1, characterized in that: Opposite placement holes are provided at the two ends of the left side of the frame, and a first extrusion device, a guide rod and a second extrusion device are provided on the right side of the placement hole. The first extrusion device and the second extrusion device both include an upper extrusion roller and a lower extrusion roller located below the upper extrusion roller, wherein one end of the upper extrusion roller is connected to the frame bearing, and the other end is connected to the output end of the motor through a pulley and a belt, and both ends of the lower extrusion roller are connected to the frame bearing.

7. A plastic bag cutting device according to claim 1, characterized in that: A cross bar is also fixed on the upper left side of the first platform, and a photoelectric sensor is movably connected to the cross bar.

8. A plastic bag cutting device according to claim 1, characterized in that: The placement hole is used for placing the reel.

9. A plastic bag cutting device according to claim 1, characterized in that: The two ends of the guide rod are connected with the frame bearings.

10. A plastic bag cutting device according to claim 1, characterized in that: The upper squeezing roller and the lower squeezing roller of the first squeezing device and the second squeezing device can drive the film to move forward.

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