Stretching film cutting mechanism

Abstract

The utility model discloses a stretching film cutting mechanism which comprises a pressing plate, a first pressing block, a second pressing block, a cutter and a mounting plate. A pressing plate linear actuator is fixed to the middle of the mounting plate, and a cutter linear actuator and a second pressing block linear actuator are fixed to the two sides of the pressing plate linear actuator correspondingly. The first pressing block is fixed on the mounting plate; the second pressing block is driven by a second pressing block linear actuator to do linear telescopic motion. When the second pressing block stretches out, the front end of the second pressing block and the front end of the first pressing block form an extrusion plane. The cutter is arranged between the first pressing block and the second pressing block and driven by the cutter linear actuator to do linear telescopic motion. The pressing plate is driven by a pressing plate linear actuator to do linear telescopic motion. The linear actuator drives the pressing plate and the pressing block to press a film, the stretched film is not prone to disengagement, the linear actuator drives the cutter to cut off the film, the stretched film is cut off stably in the automatic winding process of the winding machine, and the whole process can be operated automatically and continuously.

Description

Technical Field

[0001] The utility model relates to a packaging processing device, in particular to a stretching film cutting mechanism. Background Art

[0002] Plastic stretching film is a commonly used material in the packaging industry. When goods need to be transported or stored over a long distance, the stretching film can be used to fix and bind the goods. The stretching film has good stretchability and can be tightly wrapped and bound when it is close to the surface of the goods, preventing the goods from scattering and moving.

[0003] On an automatic winding machine, manual wallpaper knives are usually used for cutting or a cutter is installed on a single cylinder for cutting. Manual cutting affects the efficiency. In the way of installing a cutter on a single cylinder, the film is placed on a nylon plate and the film is cut on the nylon plate. During the operation process, the situation of unable to cut through may occur and someone needs to pay attention all the time, which is not reliable enough. The stretching film winding machine needs a stable and reliable cutting method for the stretching film to ensure that the equipment can run without being attended for a certain period of time. Summary of the Invention

[0004] Aiming at the above existing technical problems, the utility model provides a stretching film cutting mechanism, which can stably cut the stretching film during the automatic winding process of the winding machine and enable the mechanism to continuously run for a certain period of time.

[0005] To solve the above technical problems, the utility model adopts the following technical scheme: a stretching film cutting mechanism, including a pressing plate, a first pressing block, a second pressing block, a cutter and a mounting plate; a pressing plate linear actuator is fixed in the middle of the mounting plate, and a cutter linear actuator and a second pressing block linear actuator are respectively fixed on both sides of the pressing plate linear actuator; the first pressing block is fixed on the mounting plate; the second pressing block is driven by the second pressing block linear actuator to make a linear telescopic movement, and when the second pressing block extends, the front end of the second pressing block forms a pressing plane with the front end of the first pressing block; the cutter is arranged between the first pressing block and the second pressing block and is driven by the cutter linear actuator to make a linear telescopic movement; the pressing plate is driven by the pressing plate linear actuator to make a linear telescopic movement, and the stretching film is located between the pressing plate and the two pressing blocks. When the second pressing block extends, the pressing plate contracts to squeeze the stretching film on the first pressing block and the second pressing block, and the cutter extends to cut the stretching film.

[0006] Further, a pair of slideways are arranged on the mounting plate, and a pair of auxiliary support rods are arranged in the slideways, and both sides of the pressing plate are connected with the auxiliary support rods.

[0007] Further, an avoidance hole for the cutter is arranged at the center of the pressing plate.

[0008] Further, the pressing plate linear actuator, the second pressing block linear actuator and the cutter linear actuator are cylinders.

[0009] Furthermore, in the present utility model, the first pressing block and the second pressing block are rubber pressing blocks.

[0010] Furthermore, in the present utility model, the mounting plate is provided with oval mounting holes.

[0011] The beneficial effects of adopting the above technical solution are as follows: The present utility model is arranged at the cutting position of the stretch film of the winding machine. When the stretch film packaging is completed, the pressing plate is driven by the linear actuator to press the stretch film against the two pressing blocks, and then the cutter extends out to cut the film. The second pressing block contracts to release the front section of the cut stretch film. At this time, the rear section of the stretch film is still pressed to facilitate the winding machine to continue to pull the film to wind the next product. When the film adheres to the product, the pressing plate extends out to release the rear section of the stretch film, allowing the winding machine to continue to complete the packaging. After the packaging is completed, the above actions are cycled. In the present utility model, the pressing plate and the pressing blocks are driven by the linear actuator to press the film, so that the stretch film is not easily separated, and the cutter is driven by the linear actuator to cut the film, making the cutting of the stretch film stable during the automatic winding process of the winding machine. The whole process can run automatically, saving manpower, and the equipment can run continuously without supervision for a certain period of time. Description of the Drawings

[0012] Figure 1 Schematic diagram of the pressing plate extending out of the present utility model;

[0013] Figure 2 Schematic diagram of the bottom state of the pressing plate extending out of the present utility model;

[0014] Figure 3 Schematic diagram of the state where the pressing plate contracts to press the film of the present utility model;

[0015] Figure 4 Schematic diagram of the bottom state of the pressing plate contracting to press the film of the present utility model;

[0016] Figure 5 Schematic diagram of cutting the film of the present utility model;

[0017] Figure 6 Schematic diagram of releasing the film of the present utility model;

[0018] In the figure: 10, stretch film; 11, front section of the stretch film; 12, rear section of the stretch film; 21, linear actuator of the pressing plate; 22, pressing plate; 23, auxiliary support rod; 24, linear actuator of the second pressing block; 25, cutter; 26, linear actuator of the cutter; 27, first pressing block; 28, second pressing block; 29, mounting plate. Detailed Description of the Invention

[0019] The present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] An embodiment of the present utility model is as follows: As Figure 1 and Figure 2 shown, a stretching film cutting mechanism includes a pressing plate 22, a first pressing block 27, a second pressing block 28, a cutting knife 25, and a mounting plate 29. A pressing plate linear actuator 21 is fixed in the middle of the mounting plate 29. On both sides of the pressing plate linear actuator 21, a cutting knife linear actuator 26 and a second pressing block linear actuator 24 are respectively fixed. The first pressing block 27 is fixed on the mounting plate 29. The second pressing block 28 can perform a linear telescopic movement driven by the second pressing block linear actuator 24. When the second pressing block 28 extends, the front end of the second pressing block 28 and the front end of the first pressing block 27 form a pressing plane. The cutting knife 25 is arranged between the first pressing block 27 and the second pressing block 28 and can perform a linear telescopic movement driven by the cutting knife linear actuator 26. The pressing plate 22 performs a linear telescopic movement driven by the pressing plate linear actuator 21. The stretching film 10 is located between the pressing plate 22 and the two pressing blocks. When the second pressing block 28 extends, the pressing plate 22 contracts to press the stretching film 10 against the first pressing block 27 and the second pressing block 28, and the cutting knife 25 extends to cut the stretching film 10.

[0022] The working process of the present utility model is as follows: First, the mechanism is set at the cutting position of the stretching film 10 of the winding machine, as Figure 1 and Figure 2 shown. The pressing plate linear actuator 21 drives the pressing plate 22 to extend. The stretching film 10 is located between the pressing plate 22 and the two pressing blocks. After the winding machine pulls the stretching film 10 to complete the product packaging, the second pressing block linear actuator 24 drives the second pressing block 28 to extend, and a plane is formed at the front ends of the first pressing block 27 and the second pressing block 28. Then, as Figure 3 and Figure 4 shown, the pressing plate 22 contracts backward to press the stretching film 10 against the first pressing block 27 and the second pressing block 28, and then the cutting knife linear actuator 26 drives the cutting knife 25 to extend to cut the stretching film 10, and the stretching film 10 becomes two segments. Subsequently, as Figure 5 and Figure 6As shown, the cutting knife 25 retracts, and the second pressing block linear actuator 24 drives the second pressing block 28 to retreat, releasing the front section 11 of the stretch film. At this time, the packaged product can be removed, while the rear section 12 of the stretch film is still pressed by the first pressing block 27 and the pressing plate 22, ensuring that the winding machine can continue to tighten the film and new packaging products can be placed continuously. The winding machine continues to pull the film to wind the next product. When the film adheres to the product, the pressing plate 22 extends to release the rear section 12 of the stretch film, allowing the winding machine to continue to complete the packaging. After the packaging is completed, the above actions are cycled.

[0023] In some other specific embodiments of the present invention, the rest is the same as the above embodiment, except that, as Figure 1 shown, a pair of slideways are provided on the mounting plate 29, and a pair of auxiliary support rods 23 are arranged in the slideways. The two sides of the pressing plate 22 are connected to the auxiliary support rods 23, which play an auxiliary supporting and guiding role for the pressing plate 22.

[0024] In some other specific embodiments of the present invention, the rest is the same as the above embodiment, except that, as Figure 1 shown, an avoidance hole for the cutting knife 25 is provided at the center of the pressing plate 22 to prevent the cutting knife 25 from touching the pressing plate 22 and being damaged.

[0025] In some other specific embodiments of the present invention, the rest is the same as the above embodiment, except that, as Figure 2 shown, the pressing plate linear actuator 21, the second pressing block linear actuator 24, and the cutting knife linear actuator 26 are cylinders. The cylinders have a fast response speed and stable and reliable operation. Of course, other suitable linear actuators, such as electric push rods, can also be selected.

[0026] In some other specific embodiments of the present invention, the rest is the same as the above embodiment, except that, as Figure 2 shown, the first pressing block 27 and the second pressing block 28 are rubber pressing blocks. Made of rubber material, they will not cause damage to the equipment.

[0027] In some other specific embodiments of the present invention, the rest is the same as the above embodiment, except that, as Figure 1 shown, oval mounting holes are provided on the mounting plate 29, which is convenient for installing this mechanism.

[0028] Of course, the above embodiments are only used to illustrate the technical concept and features of the present invention, and their purpose is to enable those who are familiar with this technology to understand the content of the present invention and implement it accordingly. It should not be used to limit the protection scope of the present invention. All equivalent transformations or modifications made according to the spirit essence of the main technical solution of the present invention should be covered within the protection scope of the present invention.

Claims

1. A stretching film cutting mechanism, characterized in that, It includes a pressing plate, a first pressing block, a second pressing block, a cutting knife and a mounting plate; A pressing plate linear actuator is fixed in the middle of the mounting plate, and a cutting knife linear actuator and a second pressing block linear actuator are respectively fixed on both sides of the pressing plate linear actuator; The first pressing block is fixed on the mounting plate; The second pressing block is driven by the second pressing block linear actuator to perform linear telescopic motion. When the second pressing block extends, the front end of the second pressing block forms a pressing plane with the front end of the first pressing block; The cutting knife is arranged between the first pressing block and the second pressing block and is driven by the cutting knife linear actuator to perform linear telescopic motion; The pressing plate is driven by the pressing plate linear actuator to perform linear telescopic motion. The stretch film is located between the pressing plate and the two pressing blocks. When the second pressing block extends, the pressing plate contracts to squeeze the stretch film onto the first pressing block and the second pressing block, and the cutting knife extends to cut the stretch film.

2. The stretching film cutting mechanism according to claim 1, wherein, A pair of slideways are provided on the mounting plate, and a pair of auxiliary support rods are arranged in the slideways. Both sides of the pressing plate are connected to the auxiliary support rods.

3. The stretching film cutting mechanism according to claim 1 or 2, characterized in that, A relief hole for the cutting knife is provided in the center of the pressing plate.

4. A stretching film cutting mechanism according to claim 1 or 2, characterized in that The pressing plate linear actuator, the second pressing block linear actuator and the cutting knife linear actuator are cylinders.

5. A stretching film cutting mechanism according to claim 1 or 2, characterized in that, The first pressing block and the second pressing block are rubber pressing blocks.

6. A stretching film cutting mechanism according to claim 1 or 2, characterized in that, Oval mounting holes are provided on the mounting plate.

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