Polypropylene film trimming device

Abstract

The utility model relates to the technical field of polypropylene film production, in particular to a polypropylene film edge cutting device which comprises an installation frame, a first discharging roller and a second discharging roller are rotationally installed on one side of the installation frame, and film bodies are wound on the outer surfaces of the first discharging roller and the second discharging roller. The cutting-off assembly is fixedly installed at the top of the positioning frame, the cutting-off assembly is used for cutting off the two sides of the film body, and the cutting-off assembly comprises a pressing roller and a cutting roller; and the abutting assemblies are arranged on the front side and the rear side of the cutting assembly and used for assisting the cutting assembly in tensioning operation. Compared with the prior art, by arranging the abutting assembly, it is guaranteed that the surface of the whole thin film is subjected to equal pressure, the flatness and stability of the thin film are kept, deformation and movement of the thin film in the cutting process can be reduced through the uniform abutting force, the accuracy and consistency of cutting lines can be guaranteed, and cutting errors are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of polypropylene film production, in particular to a polypropylene film edge trimming device. Background Art

[0002] Polypropylene film is commonly used to make various packaging materials, packaging bags, plastic bags, film packaging and other products. In the process of making these products, polypropylene film is usually required to be cut to meet the needs of different sizes and shapes. The purpose of cutting includes cutting to the required size, removing irregular edges, ensuring the edges are flat, etc.

[0003] In the prior art, a Chinese patent document with publication number CN212096518U proposes a film trimming device that positions a positioning rod by a piston rod of a cylinder, and drives the trimming device to perform trimming, so that the trimming device and the film perform horizontal cutting, which has less resistance and less impact on the film than the vertical cutting method. However, consistent with the traditional method, in the traditional trimming device, the film often lacks stability support during the cutting process. Therefore, the film is easily squeezed and stretched by the cutting tool, causing it to shake and shift in the cutting area. This shaking and shifting will make the cutting line irregular or fluctuating, resulting in the accuracy and consistency of the cutting line being affected. In addition, due to the instability of the film during the cutting process, it is difficult for the operator to accurately control the position and cutting speed of the tool, thereby increasing the possibility of cutting errors. Even a slight shaking or shifting may cause the cutting line to deviate from the expected position, thereby affecting the cutting quality and consistency of the film. The increase in this cutting error will not only reduce the quality of the product, but may also cause some products to be discarded, increasing production costs and waste of resources. Utility Model Content

[0004] In view of this, the purpose of the utility model is to provide a polypropylene film trimming device to solve the problem of lack of stable support during cutting.

[0005] Based on the above purpose, the utility model provides a polypropylene film trimming device, including a mounting frame, positioning rollers are rotatably mounted on both sides of the top of the mounting frame, a first discharge roller and a second discharge roller are rotatably mounted on one side of the mounting frame, a film body is rolled up on the outer surfaces of the first discharge roller and the second discharge roller, the first discharge roller and the second discharge roller are used to unwind the film body, a winding roller is rotatably mounted on the other side of the mounting frame, the winding roller is used to wind up the cut film body, and a positioning frame is fixedly mounted on the top of the middle part of the mounting frame;

[0006] A cutting assembly, which is fixedly mounted on the top of the positioning frame, and is used to cut off both sides of the film body, and the cutting assembly includes a pressing roller and a cutting roller;

[0007] The pressing assembly is arranged at the front and rear sides of the cutting assembly, and the pressing assembly is used to assist the cutting assembly in performing tensioning operation.

[0008] Preferably, the pressing roller and the cutting roller are both rotatably mounted on the top middle of the positioning frame, the pressing roller is located in front of the cutting roller, and cutters are threadedly mounted on both sides of the cutting roller, and the cutters are used to trim the film body.

[0009] Preferably, the pressing assembly includes a front pressing module and a rear pressing module, the front pressing module includes a positioning rod fixedly installed in the middle of the top end of the mounting frame, a plurality of auxiliary rotating rollers adapted to the positioning rod are rotatably installed below the positioning rod, the film body is located between the auxiliary rotating rollers and the positioning rod, and a plurality of conical pressing columns are rotatably sleeved on the outer surface of the positioning rod.

[0010] Preferably, the rear pressure module includes two groups of pressure rods fixedly installed on one side of the positioning frame, each group of the pressure rods is two, the bottom of the pressure rods is arranged in an inclined shape, the two pressure rods are arranged opposite to each other, and the bottom ends of the pressure rods are rotatably installed with pressure wheels.

[0011] Preferably, the connection position between the pressure roller, the cutting roller and the positioning frame is set as a telescopic rod, and the outer surface is sleeved with a first return spring, and the connection between the pressure rod and the positioning frame is set as a telescopic rod, and the outer surface is sleeved with a second return spring.

[0012] Preferably, a rotating motor is fixedly installed on one side of the mounting frame close to the first discharge roller and the second discharge roller, the output end of the rotating motor is fixedly connected to a driving gear, one end of the first discharge roller and the second discharge roller is fixedly connected to a driven gear, and a belt is arranged between the driving gear and the driven gear for transmission, a servo motor is arranged on one side of the winding roller, and the output end of the servo motor is fixedly connected to one end of the winding roller.

[0013] Preferably, the other sides of the first discharging roller, the second discharging roller and the winding roller are each provided with an adjustment structure, and the adjustment structure is used to adjust the first discharging roller, the second discharging roller and the winding roller to move horizontally.

[0014] Beneficial effects of the utility model:

[0015] 1. The polypropylene film trimming device is provided with a pressing assembly. The front pressing module works together through the positioning rod, the auxiliary rotating roller and the pressing column, and the pressing rod and the pressing wheel of the rear pressing module to stably position and tension the film, which ensures that the film maintains a stable position and tension during the cutting process, reduces the shaking and displacement of the film, and reduces the shaking and displacement of the film during the cutting process through the front and rear pressing, thereby improving the cutting precision and accuracy, which helps to prevent the film from loosening or misalignment during the cutting process, and reduces the possibility of cutting errors. The inclined setting of the pressing rod and the rotating installation of the pressing wheel provide a uniformly distributed pressing force along the length direction of the film, which helps to ensure that the entire film surface is subjected to equal pressure, maintains the flatness and stability of the film, and the uniform pressing force can reduce the deformation and movement of the film during the cutting process, helps to ensure the accuracy and consistency of the cutting line, and reduces cutting errors.

[0016] 2. This polypropylene film trimming device is provided with a cutting assembly, and the threaded installation allows the position of the cutter to be fine-tuned to adapt to different trimming specifications. The operator can adjust the position and angle of the cutter as needed to ensure the accuracy and consistency of the cutting, and because the position of the cutter can be adjusted, the position and angle of the tool can be adjusted as needed to adapt to the trimming requirements of different specifications. This flexibility allows the device to handle film bodies of different sizes and shapes, and the cooperation with the return spring makes the telescopic rod have a certain elasticity and buffering effect, maintaining the stability and reliability of the connection, and even under severe vibration or impact generated during the cutting process, it can maintain the connection state to ensure the normal operation of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 This is a schematic diagram of the structure of the utility model from the first perspective;

[0019] Figure 2 This is a schematic diagram of the structure of the utility model from a second viewing angle;

[0020] Figure 3 For this utility model Figure 2 The enlarged structural diagram at A in the middle;

[0021] Figure 4 It is a schematic diagram of the structure of the cutting assembly and the rear pressing assembly of the utility model.

[0022] The markings in the figure are:

[0023] 1. Mounting frame; 2. Positioning rod; 3. First discharging roller; 4. Second discharging roller; 5. Rotating motor; 6. Belt; 7. Auxiliary rotating roller; 8. Film body; 9. Winding roller; 10. Servo motor; 11. Adjusting structure; 12. Positioning rod; 13. Positioning frame; 14. Pressing roller; 15. Cutting roller; 16. Cutter; 17. First return spring; 18. Pressure rod; 19. Pressure wheel; 20. Second return spring. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0025] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0026] like Figures 1 to 4 As shown, the polypropylene film trimming device comprises a mounting frame 1, positioning rollers 2 are rotatably mounted on both sides of the top of the mounting frame 1, a first discharging roller 3 and a second discharging roller 4 are rotatably mounted on one side of the mounting frame 1, a film body 8 is rolled on the outer surfaces of the first discharging roller 3 and the second discharging roller 4, the first discharging roller 3 and the second discharging roller 4 are used to unwind the film body 8, a winding roller 9 is rotatably mounted on the other side of the mounting frame 1, the winding roller 9 is used to rewind the cut film body 8, and a positioning frame 13 is fixedly mounted on the top of the middle part of the mounting frame 1; A cutting assembly, which is fixedly mounted on the top of the positioning frame 13, and is used to cut off both sides of the film body 8, and the cutting assembly includes a pressure roller 14 and a cutting roller 15; a pressing assembly, which is arranged on the front and rear sides of the cutting assembly, and is used to assist the cutting assembly in tensioning operation, wherein the pressure roller 14 and the cutting roller 15 are both rotatably mounted on the top middle part of the positioning frame 13, the pressure roller 14 is located in front of the cutting roller 15, and the two sides of the cutting roller 15 are respectively threadedly mounted with cutters 16, and the cutters 16 are used to trim the film body 8;

[0027] The polypropylene film body 8 to be processed is placed on the mounting frame 1, and the unwinding operation is performed through the first discharging roller 3 and the second discharging roller 4. The positioning roller 2 fixes the position of the film body 8 to ensure the accuracy of the trimming. The cutting assembly is fixedly installed on the top of the positioning frame 13, and is used to cut the two sides of the film body 8. The cutting assembly includes a pressure roller 14 and a cutting roller 15. The pressure roller 14 and the cutting roller 15 are installed on the top of the positioning frame 13 by rotation. The pressure roller 14 is located in front of the cutting roller 15. Cutters 16 are installed on both sides of the cutting roller 15 for trimming the film body 8. The pressing assembly is arranged on the front and rear sides of the cutting assembly to assist the cutting assembly in the tensioning operation, which can ensure the stability of the film body 8 during the trimming process and make the cutting more accurate. , and the cutter 16 is arranged on the cutting roller 15, which can maintain a constant distance and angle with the film body 8, thereby realizing efficient cutting operation, which can ensure that each cutting is accurate and improve production efficiency, and the threaded installation allows the position of the cutter 16 to be fine-tuned to adapt to different trimming specifications. The operator can adjust the position and angle of the cutter 16 as needed to ensure the accuracy and consistency of the cutting, and because the position of the cutter 16 can be adjusted, the position and angle of the tool can be adjusted as needed to adapt to the trimming requirements of different specifications. This flexibility enables the device to handle film bodies 8 of different sizes and shapes, improves applicability and versatility, and the cut film body 8 is wound up by the winding roller 9 to complete the trimming process.

[0028] like Figure 3 , Figure 4 As shown, the pressing assembly includes a front pressing module and a rear pressing module. The front pressing module includes a positioning rod 12 fixedly mounted at the middle of the top of the mounting frame 1, and a plurality of auxiliary rotating rollers 7 adapted thereto are rotatably mounted below the positioning rod 12. The film body 8 is located between the auxiliary rotating roller 7 and the positioning rod 12. The outer surface of the positioning rod 12 is also rotatably sleeved with a plurality of conical pressing columns. The rear pressing module includes two groups of pressing rods 18 fixedly mounted on one side of the positioning frame 13. Both groups of pressing rods 18 are two in number. The bottoms of the pressing rods 18 are arranged in an inclined shape. The two pressing rods 18 are arranged opposite to each other. The bottoms of the pressing rods 18 are rotatably mounted with pressing wheels 19.

[0029] The film body 8 is unwound from the first discharging roller 3 and the second discharging roller 4 of the mounting frame 1, and is positioned and tensioned by the positioning rod 12 and the auxiliary rotating roller 7 of the front pressing module. The positioning rod 12, the auxiliary rotating roller 7 and the pressing column of the front pressing module and the pressing rod 18 and the pressing wheel 19 of the rear pressing module act together on the film body 8 to ensure that the film maintains a stable position and tension during the cutting process. By pressing the film forward and backward, the shaking and displacement of the film during the cutting process can be reduced, thereby improving the precision and accuracy of the cutting, and then effectively preventing the film from loosening or dislocating during the cutting process, reducing the possibility of cutting errors. , which improves production efficiency and product quality. The inclined setting of the pressure rod 18 and the rotating installation of the pressure wheel 19 can provide a pressure that is evenly distributed along the length direction of the film, which helps to ensure that the entire film surface is subjected to equal pressure, thereby maintaining the flatness and stability of the film. The uniform pressure can reduce the deformation and movement of the film during the cutting process, help to ensure the accuracy and consistency of the cutting line, thereby reducing cutting errors and improving the processing quality of the product. The stable pressure can reduce the friction resistance of the film during the cutting process, making it easier for the cutting knife to pass through the film, thereby improving the cutting efficiency and reducing the energy consumption during the cutting process.

[0030] like Figure 2 , Figure 3 As shown, the connection position of the pressing roller 14, the cutting roller 15 and the positioning frame 13 is set as a telescopic rod, and the outer surface is sleeved with a first return spring 17, and the connection position of the pressing rod 18 and the positioning frame 13 is set as a telescopic rod, and the outer surface is sleeved with a second return spring 20;

[0031] The advantage of this is that the return spring can absorb the shock and vibration from the external environment or the cutting process when the equipment is running, which helps to protect the equipment and components, reduce damage or failure caused by vibration, and extend the service life of the equipment. The telescopic rod allows the length of the connection position to be adjusted as needed to accommodate films of different sizes or shapes, which provides flexibility and adjustability, enabling the equipment to adapt to a variety of production needs and reducing the time and cost of replacing or adjusting components. In addition, the action of the spring can make the telescopic rod at the connection have a certain elasticity and buffering effect, thereby maintaining the stability and reliability of the connection. Even under severe vibration or impact generated during the cutting process, the telescopic rod can remain connected to ensure the normal operation of the equipment.

[0032] like Figure 1 , Figure 2As shown, a rotating motor 5 is fixedly installed on one side of the mounting frame 1 close to the first discharging roller 3 and the second discharging roller 4, and a driving gear is fixedly connected to the output end of the rotating motor 5, and one end of the first discharging roller 3 and the second discharging roller 4 is fixedly connected to a driven gear, and a belt 6 is arranged between the driving gear and the driven gear for transmission, and a servo motor 10 is arranged on one side of the winding roller 9, and the output end of the servo motor 10 is fixedly connected to one end of the winding roller 9, and the first discharging roller 3, the second discharging roller 4 and the winding roller 9 are all provided with an adjustment structure 11 on the other side, and the adjustment structure 11 is used to adjust the first discharging roller 3, the second discharging roller 4 and the winding roller 9 to move horizontally;

[0033] The rotating motor 5 controls the rotation speed and direction of the discharge roller through the transmission of the driving gear, the driven gear and the belt 6. The servo motor 10 controls the rotation speed and direction of the winding roller 9. This arrangement makes the operation and adjustment of the entire trimming device more flexible and precise. The transmission system between the discharge roller and the winding roller 9 enables them to work together to achieve continuous unwinding and winding of the film. The control of the motor can accurately control the speed and tension of unwinding and winding to ensure the stability and consistency of the production process. The setting of the adjustment structure 11 allows the discharge roller and the winding roller 9 to be adjusted horizontally to ensure the smooth transmission and alignment of the film. This can effectively avoid the film from being offset or twisted during the unwinding and winding process, thereby improving the production quality.

[0034] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0035] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A polypropylene film trimming device, characterized in that: include: A mounting frame (1), positioning rollers (2) are rotatably mounted on both sides of the top of the mounting frame (1), a first discharge roller (3) and a second discharge roller (4) are rotatably mounted on one side of the mounting frame (1), a film body (8) is rolled up on the outer surfaces of the first discharge roller (3) and the second discharge roller (4), the first discharge roller (3) and the second discharge roller (4) are used to unwind the film body (8), a winding roller (9) is rotatably mounted on the other side of the mounting frame (1), the winding roller (9) is used to wind up the cut film body (8), and a positioning frame (13) is fixedly mounted on the top of the middle part of the mounting frame (1); A cutting assembly, which is fixedly mounted on the top of the positioning frame (13), and is used to cut off both sides of the film body (8), and the cutting assembly comprises a pressing roller (14) and a cutting roller (15); The pressing assembly is arranged at the front and rear sides of the cutting assembly, and the pressing assembly is used to assist the cutting assembly in performing tensioning operation.

2. The polypropylene film trimming device according to claim 1, characterized in that: The pressing roller (14) and the cutting roller (15) are both rotatably mounted on the top middle part of the positioning frame (13), the pressing roller (14) is located in front of the cutting roller (15), and cutters (16) are respectively threadedly mounted on both sides of the cutting roller (15), and the cutters (16) are used to trim the film body (8).

3. The polypropylene film trimming device according to claim 1, characterized in that: The pressing assembly comprises a front pressing module and a rear pressing module, the front pressing module comprises a positioning rod (12) fixedly mounted at the middle of the top end of the mounting frame (1), a plurality of auxiliary rotating rollers (7) adapted thereto are rotatably mounted below the positioning rod (12), the film body (8) is located between the auxiliary rotating rollers (7) and the positioning rod (12), and a plurality of conical pressing columns are rotatably sleeved on the outer surface of the positioning rod (12).

4. The polypropylene film trimming device according to claim 3, characterized in that: The rear pressure module comprises two groups of pressure rods (18) fixedly mounted on one side of the positioning frame (13), each of the two groups of pressure rods (18) being two, the bottoms of the pressure rods (18) being arranged in an inclined shape, the two pressure rods (18) being arranged opposite to each other, and the bottom ends of the pressure rods (18) being rotatably mounted with pressure wheels (19).

5. The polypropylene film trimming device according to claim 4, characterized in that: The connection position between the pressing roller (14), the cutting roller (15) and the positioning frame (13) is set as a telescopic rod, and the outer surface is sleeved with a first return spring (17); the connection position between the pressing rod (18) and the positioning frame (13) is set as a telescopic rod, and the outer surface is sleeved with a second return spring (20).

6. The polypropylene film trimming device according to claim 1, characterized in that: A rotating motor (5) is fixedly mounted on one side of the mounting frame (1) close to the first discharge roller (3) and the second discharge roller (4); the output end of the rotating motor (5) is fixedly connected to a driving gear; one end of the first discharge roller (3) and the second discharge roller (4) is fixedly connected to a driven gear; a belt (6) is provided between the driving gear and the driven gear for transmission; a servo motor (10) is provided on one side of the winding roller (9); the output end of the servo motor (10) is fixedly connected to one end of the winding roller (9).

7. The polypropylene film trimming device according to claim 2 or 6, characterized in that: An adjustment structure (11) is provided on the other side of the first discharge roller (3), the second discharge roller (4) and the winding roller (9), and the adjustment structure (11) is used to adjust the first discharge roller (3), the second discharge roller (4) and the winding roller (9) to move horizontally.

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