A multi-directional stretching device for protective film processing

Abstract

The utility model relates to protective film processing technical field, and disclose a kind of multi-directional stretching device for protective film processing, including fixed frame, the left and right sides of the fixed frame are respectively rotationally connected with the traction protective film and the traction roll of entry and exit, the inner wall both sides of the fixed frame are provided with longitudinal stretching assembly, and the longitudinal stretching assembly between both sides is provided with the rotating roller for guiding protective film, and the rotating roller is stretched to protective film by longitudinal stretching assembly lifting, the middle part of the fixed frame is provided with the radial stretching assembly for the radial stretching of protective film;First, protective film is pulled through entry traction roll, rotating roller, radial stretching assembly, exit traction roll, so that protective film presents letter "W" shape, after it can be stretched to protective film by longitudinal stretching assembly driving rotating roller up and down lifting, simultaneously, it is stretched to protective film by radial stretching assembly again in radial, and then the effect of multi-directional stretching can be realized.

Description

Technical Field

[0001] This utility model relates to the field of protective film processing technology, specifically a multi-directional stretching device for protective film processing. Background Technology

[0002] Protective film is a thin film material used to protect the surface of an object from scratches, contamination, or damage. It is widely used in electronic devices, automobiles, industrial products, and other fields. Generally, the protective film is extruded by an extruder, then stretched to extend the protective film and then wound up.

[0003] For example, Chinese Patent CN116353037A discloses a PE protective film production stretching mechanism, which includes a base, a stretching component rotatably connected between two fixed bases, and clamping and conveying components on the top of the base and on both sides of the stretching component. Through the elasticity of the spring, the arc-shaped plate slides against the inner wall of the sliding frame, increasing the friction when the pressure roller rotates. Thus, the PE protective film is clamped and slowly conveyed to the right. While the stretching roller rotates counterclockwise to convey the PE protective film, it drives the internally threaded cone to reciprocate in the bidirectional threaded groove. When the arc-shaped push plate rotates downwards to the left of the stretching roller axis, the internally threaded cone moves from the middle of the bidirectional threaded groove towards the middle of the stretching roller. This causes the slider to slide outwards along the linear groove of the annular plate, driving the arc-shaped push plate outwards, thereby stretching the PE protective film. This method is more efficient than using multiple rotating rollers rotating at different speeds to stretch the PE protective film and occupies less space.

[0004] In the process of realizing this application, the inventors discovered that the technology has at least the following problems: Although the above technical solution can stretch the protective film, during the stretching process, by setting a sliding arc plate on the outside of the stretching roller and increasing the friction by moving the arc plate outward to contact the protective film, the arc plate has an edge. Therefore, when stretching the protective film, the protective film will stick tightly to the arc plate, which will leave marks on the protective film and affect the quality of the protective film. Therefore, further improvements can be made. Utility Model Content

[0005] To address the aforementioned problems, this utility model provides the following technical solution: a multi-directional stretching device for processing protective film, comprising a fixed frame, with an inlet traction roller and an outlet traction roller for pulling the protective film rotatably connected to the left and right sides of the fixed frame, respectively; longitudinal stretching components are provided on both sides of the inner wall of the fixed frame, and a rotating roller for guiding the protective film is provided between the two longitudinal stretching components, and the rotating roller stretches the protective film by raising and lowering the longitudinal stretching components; a radial stretching component for radial stretching of the protective film is provided in the middle of the fixed frame, and the rotating roller is driven to raise and lower the longitudinal stretching components to stretch the protective film by raising and lowering the longitudinal stretching components, while the radial stretching components also stretch the protective film radially, thereby achieving the effect of multi-directional stretching.

[0006] As an optimization, the longitudinal stretching assembly includes a stand fixedly installed on the inner walls of both sides of the fixed frame. A compression spring is fixedly installed inside the stand, and a slider is fixedly installed on the top of the compression spring. The slider is slidably connected inside the stand. The rotating roller is rotatably connected between the two sliders. An electromagnet is fixedly installed inside the top of the stand. A magnetic block opposite to the electromagnet is fixedly installed on the top side of the slider. When the electromagnet is energized, it generates magnetism to repel the magnetic block, thus driving the slider to slide downward along the inner wall of the stand, thereby stretching the protective film downward.

[0007] As an optimization, the internal cross-section of the support frame is in the shape of a cross, and the slider is correspondingly in the shape of a cross and slides inside it.

[0008] As an optimization, the electromagnet is connected to a proportional amplifier to control the current magnitude and also has a relay for switching the circuit on and off. By adjusting the magnetic force, the stretching height of the roller descent can be controlled according to the actual situation.

[0009] As an optimization, the radial stretching assembly includes a guide rod fixedly installed on the top of the fixed frame. Both ends of the guide rod are rotatably connected to stretching rollers. The opposite ends of the two stretching rollers are rotatably connected to a cylindrical shell. An electromagnet is fixedly installed inside the cylindrical shell, and the cylindrical shell is fixedly installed on the outside of the guide rod. A reset component for driving the stretching roller to reset is provided in the middle of the stretching roller. By energizing the electromagnet in the end of the stretching roller, a repulsive magnetic force is generated to repel each other, so that the two stretching rollers on both sides are relatively far apart and radially stretch the protective film.

[0010] As an optimization, the reset component includes a fixed block fixedly installed on the outer side of a section of the guide rod inside the stretching roller. A collar is rotatably connected to the outer side of another section of the guide rod inside the stretching roller. A spring is fixedly installed between the fixed block and the collar. A fixed ring is fixedly installed on the inner wall of the stretching roller near the collar. A rotating seat is fixedly installed on the side of the fixed ring opposite the collar. The rotating seat is rotatably connected inside the fixed ring. By sliding the two stretching rollers relative to each other along the outer side of the guide rod, the spring can be compressed, thus driving the stretching roller to reset through its own elasticity.

[0011] As an optimization, a ball is embedded on the outer side of the fixing block, and an annular groove is opened on the inner wall of the guide rod corresponding to the ball. The ball is rolled in the annular groove, which reduces the friction when the stretching roller rotates.

[0012] The beneficial effects of this utility model are: The multi-directional stretching device for processing the protective film uses an electromagnet to generate magnetism that repels the magnetic block, causing the slider to slide downwards along the inner wall of the stand and stretch the protective film downwards. When the electromagnet is turned off, the slider is pushed upwards by the compression spring, thus stretching the protective film longitudinally back and forth.

[0013] The multi-directional stretching device for processing the protective film generates a repulsive magnetic force by energizing the electromagnets at the ends of the stretching rollers on both sides. This causes the stretching rollers on both sides to move away from each other. When the electromagnets on both sides are far apart, the repulsive magnetic force weakens, and the resetting component drives the stretching rollers on both sides to move closer together, thereby stretching the protective film radially back and forth. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the longitudinal tensile structure of this utility model; Figure 3 This is a top sectional view of the radial tension structure of this utility model; Figure 4 This is a schematic diagram of the radial tension structure of this utility model.

[0015] In the diagram: 1. Fixed frame; 2. Inlet traction roller; 3. Outlet traction roller; 4. Longitudinal tension assembly; 5. Rotary roller; 6. Radial tension assembly; 7. Vertical frame; 8. Compression spring; 9. Slider; 10. Electromagnet one; 11. Magnetic block; 12. Guide rod; 13. Tension roller; 14. Cylinder shell; 15. Electromagnet two; 16. Fixed block; 17. Collar; 18. Spring; 19. Fixed ring; 20. Ball bearing. Detailed Implementation

[0016] In the description of this application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[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 A multi-directional stretching device for processing protective film includes a fixed frame 1. An inlet traction roller 2 and an outlet traction roller 3 for pulling the protective film are rotatably connected to the left and right sides of the fixed frame 1, respectively. Longitudinal stretching components 4 are arranged on both sides of the inner wall of the fixed frame 1. A rotating roller 5 for guiding the protective film is arranged between the two longitudinal stretching components 4. The rotating roller 5 stretches the protective film by raising and lowering the longitudinal stretching components 4. A radial stretching component 6 for radial stretching the protective film is arranged in the middle of the fixed frame 1. By pulling the protective film through the inlet traction roller 2, the rotating roller 5, the radial stretching component 6, and the outlet traction roller 3, the protective film forms a "W" shape. Then, when winding the protective film, the longitudinal stretching component 4 drives the rotating roller 5 to rise and fall to stretch the protective film, while the radial stretching component 6 stretches the protective film radially, thus achieving multi-directional stretching. Please see Figure 2 The longitudinal stretching assembly 4 includes a frame 7 fixedly installed on the inner walls of both sides of the fixed frame 1. A compression spring 8 is fixedly installed inside the frame 7, and a slider 9 is fixedly installed on the top of the compression spring 8. The internal cross section of the frame 7 is cross-shaped, and the slider 9 slides inside the frame in a corresponding cross shape. A rotating roller 5 is rotatably connected between the two sliders 9. An electromagnet 10 is fixedly installed inside the top of the frame 7, and a magnetic block 11 opposite to the electromagnet 10 is fixedly installed on the top side of the slider 9. When the electromagnet 10 is energized, it generates magnetism to repel the magnetic block 11, thus causing the slider 9 to slide downward along the inner wall of the frame 7, thereby stretching the protective film downward. When the electromagnet 10 is turned off, the compression spring 8 will drive the slider 9 to return to its original position, thus facilitating the stretching of the protective film back and forth. Please see Figure 2Electromagnet 10 is connected to a proportional amplifier to control the current magnitude. It also has a relay to switch the circuit on and off. The proportional amplifier can control the current magnitude entering electromagnet 10, thus adjusting the magnetic force of electromagnet 10. In this way, the stretching height of the rotating roller 5 can be controlled according to the actual situation, improving practicality. Please see Figure 3-4 The radial stretching assembly 6 includes a guide rod 12 fixedly installed on the top of the fixed frame 1. Both ends of the guide rod 12 are rotatably connected to stretching rollers 13. The opposite ends of the two stretching rollers 13 are rotatably connected to a cylindrical shell 14. An electromagnet 15 is fixedly installed inside the cylindrical shell 14, and the cylindrical shell 14 is fixedly installed on the outside of the guide rod 12. A reset member is provided in the middle of the stretching roller 13 for resetting the stretching roller 13. By energizing the electromagnet 15 in the end of the stretching roller 13, a repulsive magnetic force is generated to repel each other, so that the two stretching rollers 13 on both sides will move away from each other. When the electromagnets 15 on both sides are far apart, the repulsive magnetic force will weaken, so the reset member will drive the two stretching rollers 13 on both sides to move closer to each other, thereby radially stretching the protective film back and forth. Please see Figure 3-4 The reset component includes a fixing block 16 fixedly installed on the outer side of a section of the guide rod 12 inside the stretching roller 13, and a collar 17 rotatably connected to the outer side of another section of the guide rod 12 inside the stretching roller 13. A spring 18 is fixedly installed between the fixing block 16 and the collar 17. A fixing ring 19 is fixedly installed on the inner wall of the stretching roller 13 near the collar 17, and a rotating seat is fixedly installed on one side of the collar 17 opposite to the fixing ring 19. The rotating seat is rotatably connected inside the fixing ring 19. By sliding the two stretching rollers 13 relative to each other along the outer side of the guide rod 12, the spring 18 can be compressed, so the stretching roller 13 will be reset by its own elasticity. At the same time, the rotating seat will not hinder the stretching roller 13 from rotating and sliding along the guide rod 12. Please see Figure 3-4 The outer side of the fixed block 16 is fitted with a ball 20, and the inner wall of the guide rod 12 is provided with an annular groove corresponding to the ball 20. The ball 20 is rolled in the annular groove. The rolling of the ball 20 in the annular groove will reduce the friction when the stretching roller 13 rotates.

[0019] In use, the protective film is first pulled through the inlet traction roller 2, the rotating roller 5, the radial stretching component 6, and the outlet traction roller 3, so that the protective film is in the shape of the letter "W". Then the protective film can be wound up and passed through the rotating roller 5 and the radial stretching component 6. When passing through the rotating roller 5, the electromagnet 10 is activated by powering on, which generates magnetism to repel the magnetic block 11. This will drive the slider 9 to slide down along the inner wall of the stand 7, thus stretching the protective film downward. After the electromagnet 10 is turned off, the slider 9 will be driven to return to its original position by the compression spring 8, thus stretching the protective film back and forth. When passing through the radial stretching assembly 6, the electromagnets 15 at the ends of the stretching rollers 13 on both sides are activated by powering on, which generates a repulsive magnetic force that causes the stretching rollers 13 on both sides to move away from each other. When the electromagnets 15 on both sides are far apart, the repulsive magnetic force will weaken, so the resetting component will drive the stretching rollers 13 on both sides to move closer together, thereby radially stretching the protective film back and forth.

[0020] In summary, the multi-directional stretching device for processing the protective film can generate magnetism by activating the electromagnet 10 to repel the magnetic block 11, thus causing the slider 9 to slide downward along the inner wall of the stand 7, thereby stretching the protective film downward. When the electromagnet 10 is turned off, the compression spring 8 will drive the slider 9 to return to its original position, thereby stretching the protective film longitudinally back and forth. By energizing the electromagnets 15 at the ends of the two stretching rollers 13, a repulsive magnetic force is generated, causing the two stretching rollers 13 to move away from each other. When the two electromagnets 15 are far apart, the repulsive magnetic force weakens, and the resetting component drives the two stretching rollers 13 to move closer together, thereby radially stretching the protective film back and forth.

[0021] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," "join," and "fix" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] All standard parts used in this invention can be purchased from the market, and irregular parts can be customized according to the description and drawings.

[0023] The above are merely preferred embodiments of this utility model, but the scope of protection of this utility model is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in this utility model, based on the technical solution and inventive concept of this utility model, should be included within the scope of protection of this utility model.

Claims

1. A multi-directional stretching device for processing protective films, comprising a fixing frame (1), characterized in that: The left and right sides of the fixed frame (1) are respectively rotatably connected to the inlet traction roller (2) and outlet traction roller (3) for pulling the protective film. The inner walls of the fixed frame (1) are provided with longitudinal tensioning components (4). Between the longitudinal tensioning components (4) on both sides, there is a rotating roller (5) for guiding the protective film. The rotating roller (5) stretches the protective film by lifting and lowering through the longitudinal tensioning components (4). The middle part of the fixed frame (1) is provided with a radial tensioning component (6) for radially stretching the protective film.

2. The multi-directional stretching device for protective film processing according to claim 1, characterized in that: The longitudinal tensioning assembly (4) includes a stand (7) fixedly installed on the inner walls of both sides of the fixed frame (1). A compression spring (8) is fixedly installed inside the stand (7). A slider (9) is fixedly installed on the top of the compression spring (8). The slider (9) is slidably connected inside the stand (7). The rotating roller (5) is rotatably connected between the two sliders (9). An electromagnet (10) is fixedly installed inside the top of the stand (7). A magnetic block (11) opposite to the electromagnet (10) is fixedly installed on the top side of the slider (9).

3. The multi-stretching apparatus for protective film processing according to claim 2, characterized by: The internal cross section of the support frame (7) is shaped like a cross, and the slider (9) is shaped like a cross and slides inside it.

4. The multi-stretching apparatus for protective film processing according to claim 2, characterized by: The electromagnet (10) is connected to a proportional amplifier to control the current magnitude and also has a relay for switching the circuit on and off.

5. The multi-stretching apparatus for protective film processing according to claim 1, wherein: The radial stretching assembly (6) includes a guide rod (12) fixedly installed on the top of the fixed frame (1). Both ends of the guide rod (12) are rotatably connected to stretching rollers (13). The opposite ends of the two stretching rollers (13) are rotatably connected to a cylindrical shell (14). An electromagnet (15) is fixedly installed inside the cylindrical shell (14). The cylindrical shell (14) is fixedly installed on the outside of the guide rod (12). A reset component for resetting the stretching roller (13) is provided in the middle of the stretching roller (13).

6. The multi-directional stretching device for protective film processing according to claim 5, characterized in that: The reset component includes a fixing block (16) fixedly installed on the outer side of a section inside the guide rod (12) of the stretching roller (13). A collar (17) is rotatably connected to the outer side of another section inside the guide rod (12) of the stretching roller (13). A spring (18) is fixedly installed between the fixing block (16) and the collar (17). A fixing ring (19) is fixedly installed on the inner wall of the stretching roller (13) near the collar (17). A rotating seat is fixedly installed on one side of the collar (17) opposite to the fixing ring (19). The rotating seat is rotatably connected inside the fixing ring (19).

7. The multi-stretching apparatus for protective film processing according to claim 6, characterized by: The outer side of the fixing block (16) is fitted with a ball (20), and the inner wall of the guide rod (12) is provided with an annular groove corresponding to the ball (20), and the ball (20) is rolled and connected in the annular groove.

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