A film pasting device for curved screen production

Abstract

The utility model discloses a kind of film pasting devices for curved screen production, it is related to curved screen film pasting equipment technical field, including horizontal frame, the support frame is set in the both ends of first mount; first mount, the first mount is fixed on horizontal frame, its both ends are equipped with first sleeve;Guide rod, the guide rod is threaded in first sleeve, its top end is fixed with top plate, its bottom end is equipped with rotatable pressure rod;Lifting cylinder, the lifting cylinder is fixed in the middle of first mount, its piston rod connects first top disc, the first top disc is in contact with the bottom center of top plate, the top plate top is equipped with first connecting rod, it is fixed through top plate and first top disc, device is through mechanical flexible compression, the high-precision, bubble-free attachment of curved screen protective film is realized, suitable for screen of different size and curvature, improve production efficiency and yield.

Description

Technical Field

[0001] This utility model relates to the technical field of curved screen film application equipment, specifically a film application device for curved screen production. Background Technology

[0002] With the rapid development of flexible display technology, curved screens have been widely used in high-end consumer electronics such as smartphones, smartwatches, and automotive displays. Curved screens, due to their unique arc design, can enhance visual immersion and human-computer interaction. However, their non-planar structure also presents significant challenges to the screen protector lamination process. Traditional flat lamination equipment uses rigid rollers or scrapers for pressing, which is difficult to adapt to the curvature changes of curved screens, easily leading to problems such as edge lifting, air bubble residue, or uneven film stretching, seriously affecting the film yield and production efficiency. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a film-applying device for curved screen production. By adjusting the height under mechanical flexible pressing, it can achieve high-precision, bubble-free application of the protective film for curved screens. It is suitable for screens of different sizes and curvatures, thereby improving production efficiency and yield.

[0004] The objective of this utility model is achieved through the following technical solution: A film application device for producing curved screens includes: The cross frame has support frames at both ends of the first mounting base; The first mounting base is fixed on the cross frame and has first sleeves at both ends; A guide rod, which passes through the first sleeve, has a top plate fixed at its top end and a rotatable pressure rod installed at its bottom end; A lifting cylinder is fixed in the middle of the first mounting base, and its piston rod is connected to the first top plate, which is in contact with the center of the bottom of the top plate.

[0005] Furthermore, a first connecting rod is provided at the top of the top plate, which passes through the top plate and is fixed to the first top plate; a spring is sleeved on the first connecting rod, and a second top plate is provided at the bottom of the spring; the bottom of the first connecting rod passes through the second top plate and the top plate and is fixed to the first top plate.

[0006] Furthermore, the pressure bar includes a roller, the two ends of which are rotatably connected to the guide rod via connectors, and a first flexible pressure ring, a pressing sleeve, and a second flexible pressure ring are sequentially fitted onto the roller.

[0007] Furthermore, the top of the connector is fixed to the bottom of the guide rod, and the side of the connector is connected to the end of the roller via a bearing.

[0008] Furthermore, both of the aforementioned support frames are provided with height adjustment components on their sides, the height adjustment components including: Symmetrically arranged guide rails, which are fixed to the support frame; The slider is slidably engaged with the guide rail and fixed to the crossbar; Nut seat, which is located on the back of the support frame and is threaded into the vertical lead screw; The lead screw is fixed at both ends by a first bearing seat and a second bearing seat; A drive motor drives a lead screw to rotate on a second bearing housing via a coupling.

[0009] Furthermore, the first and second flexible pressure rings are made of silicone rubber with a Shore A hardness of 30-50, and the pressing sleeve is made of metal with anti-slip texture on its surface.

[0010] Furthermore, the roller is equipped with a heating element, and the temperature control range is 25-80℃.

[0011] Furthermore, the film-applying device also includes a PLC control system for coordinating the linkage operation of the lifting cylinder and the drive motor.

[0012] The beneficial effects of this utility model are: In this application, a lifting cylinder and a guide rod are used to drive the pressure rod to rise and fall, thereby pressing the film tightly against the screen to avoid bubbles and wrinkles. The pressure rod has a flexible pressure ring to press the screen edge to adapt to screens with different curvatures, ensuring a tight fit at the edge. A spring buffer is also designed to avoid hard impacts and protect the screen from damage. The entire device achieves high-precision, bubble-free bonding of the protective film for curved screens through mechanical flexible pressing and efficient adjustment at different heights. It is suitable for screens of different sizes and curvatures, improving production efficiency and yield. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of this utility model; In the diagram, 1. Support frame; 2. Cross frame; 3. Pressure rod; 31. Roller; 32. First flexible pressure ring; 33. Pressing sleeve; 34. Second flexible pressure ring; 4. Connector; 5. Guide rod; 6. First sleeve; 7. First mounting base; 8. Lifting cylinder; 9. First top plate; 10. First top plate; 11. First connecting rod; 12. Spring; 13. Second top plate; 14. Slider; 15. Guide rail; 16. Lead screw; 17. Drive motor; 18. First bearing seat; 19. Second bearing seat; 20. Nut seat. Detailed Implementation

[0014] like Figure 1As shown, a film-applying device for curved screen production is designed to better press the protective film onto the curved screen. The device includes a horizontal frame 2, a support frame 1, a first mounting base 7, a guide rod 5, and a lifting cylinder 8. The components are connected as follows: The first mounting base 7 has support frames 1 at both ends; the bottoms of the two support frames 1 are fixedly supported on the ground or the production line frame conveying the curved screen. The first mounting base 7 is fixed to the horizontal frame 2. First sleeves 6 are provided at both ends of the first mounting base 7. The first sleeves 6 are fixed to the first mounting base 7 and have through holes for the guide rod 5 to pass through. The guide rod 5 passes through the first sleeve 6. The first sleeve 6 and the guide rod 5 are connected... The guide rod 5 is clearance-fitted with the top plate 9, and the bottom of the guide rod 5 is connected to the pressure rod 3. The lifting cylinder 8 is fixed in the middle of the first mounting base 7. The piston rod of the lifting cylinder 8 is connected to the first top plate 10, and the first top plate 10 is in contact with the bottom center of the top plate 9. The lifting cylinder 8 is supported by the first mounting base 7. The push rod of the lifting cylinder 8 pushes the top plate 9 and the two guide rods 5 to rise and fall vertically, driving the pressure rod 3 to rise and fall synchronously. The pressure rod 3 can rotate between the two guide rods 5. The protective film and the curved screen flowing below the pressure rod 3 are pressed together by rolling, squeezing the gap between the protective film and the curved screen, and squeezing out the air in the gap, so as to achieve high-precision and bubble-free bonding of the protective film of the curved screen.

[0015] like Figure 1 As shown, a first connecting rod 11 is provided at the top of the top plate 9. The first connecting rod 11 passes through the top plate 9 and is fixed to the first top plate 10. A spring 12 is sleeved on the first connecting rod 11. A second top plate 13 is provided at the bottom of the spring 12. The bottom of the first connecting rod 11 passes through the second top plate 13 and the top plate 9 and is fixed to the first top plate 10. When the lifting cylinder 8 drives the pressure rod 3 to reach the predetermined height, the pressure rod 3 contacts the screen and generates a counter-pushing force, pushing the pressure rod 3 upward. As a result, the guide rod 5 moves upward on the first sleeve 6. Then, the top plate 9 pushes the second top plate 13 to slide upward on the surface of the first connecting rod 11, thereby compressing the spring 12. Therefore, the force of squeezing the screen can be adjusted by relying on the strength of the spring 12. The force of squeezing the screen can be controlled, avoiding excessive force that could damage the screen. In the future, springs of appropriate materials can be selected for different screens.

[0016] like Figure 1As shown, the pressure rod 3 includes a roller 31. Both ends of the roller 31 are rotatably connected to the guide rod 5 through connectors 4. The top of the connector 4 is fixed to the bottom of the guide rod 5. The side of the connector 4 is connected to the end of the roller 31 through a bearing. A first flexible pressure ring 32, a pressing sleeve 33, and a second flexible pressure ring 34 are sequentially fitted on the roller 31. The first flexible pressure ring 32 and the second flexible pressure ring 34 are used for pressing the curved edge of the screen. The pressing sleeve 33 presses the center of the screen. The pressing sleeve 33, the first flexible pressure ring 32, and the second flexible pressure ring 34 are made of silicone rubber with a Shore A hardness of 30-50. The pressing sleeve is made of metal with anti-slip texture on the surface. The roller 31 is equipped with heating elements, such as a resistance wire heater and a temperature controller. The temperature controller (such as a PID controller) adjusts the on / off state or power. The temperature control range is 25-80℃. The appropriate temperature can be selected according to the material requirements.

[0017] like Figure 1 As shown, both support frames 1 are equipped with height adjustment components on their sides. Each height adjustment component includes: symmetrically arranged guide rails 15, sliders 14, nut seats 20, lead screws 16, and drive motors 17. Their connections are as follows: both guide rails 15 are fixed to the support frame 1; sliders 14 slide on the guide rails 15 and are fixed to the crossbar 2 with bolts and nuts; nut seats 20 are fixed to the back of the support frame 1 and are threaded into the vertical lead screw 16; the two ends of the lead screw 16 are fixed via first bearing seats 18 and second bearing seats 19; the drive motor 17 drives the lead screw 16 to rotate on the second bearing seat 19 via a coupling. The machine 17 is fixed to the side of the support frame 1. When the height adjustment component is activated, the drive motor 17 is started. The drive motor 17 drives the shaft of the drive motor 17 to rotate forward or backward, which drives the nut seat 20 on the lead screw 16 to move up and down along its central axis. This causes the cross frame 2 connected to the nut seat 20 to move up and down. The two drive motors 17 and the lifting cylinder 8 are all controlled by an external PLC control system. The PLC control system uses existing equipment. Users can not only control and coordinate the lifting operation of the lifting cylinder 8 through the PLC control system, but also synchronously drive the two drive motors 17 to achieve smooth lifting of the cross frame.

[0018] Work process: 1. Height Adjustment: The drive motor 17 drives the lead screw 16 to rotate through the coupling, causing the nut seat 20 to move up and down along the lead screw 16, thereby adjusting the height of the cross frame 2 to accommodate curved screens of different thicknesses. The slider 14 slides along the guide rail 15 to ensure that the cross frame 2 rises and falls smoothly.

[0019] 2. Pre-pressing of the film pressing mechanism: The lifting cylinder 8 pushes the first top plate 10 to move upward, and drives the top plate 9 to rise through the first connecting rod 11, so that the guide rod 5 slides along the first sleeve 6, driving the pressure rod 3 to press down; the spring 12 provides buffering, so that the pressure rod 3 maintains flexible pressure when contacting the curved screen, avoiding hard impact that could damage the screen.

[0020] III. Flexible pressing process: The roller 31 of the pressure bar 3 rolls on the surface of the curved screen, the first flexible pressure ring 32 and the second flexible pressure ring 34 adhere to the edge of the screen, and the pressing sleeve 33 applies uniform pressure to make the protective film adhere tightly to the screen; the roller 31 has a built-in heating element, which can heat and soften the film material to improve the bonding effect.

[0021] IV. Intelligent Control: The PLC control system coordinates the linkage between the lifting cylinder 8 and the drive motor 17 to ensure that the pressing force and lifting speed are matched, thereby realizing automated film application.

[0022] Beneficial effects: First, high-precision bonding: Driven by cylinder 8 and lead screw 16, it avoids bubbles and wrinkles. The flexible pressure ring adapts to screens with different curvatures, ensuring tight edge bonding. Second, adaptive adjustment: The spring (12) buffer mechanism avoids hard impacts and protects the screen from damage. The height adjustment components (15-20) can be adapted to equipment with different thicknesses, making it highly versatile. Third, efficient heating assistance (optional): The roller (31) has a built-in heating element (25-80℃), which can soften the film material, improve the curvature bonding, and reduce the rework rate. Fourth, automated control: The PLC system coordinates the cylinder and motor actions, reducing manual intervention and improving production efficiency. Fifth, anti-slip and wear-resistant design: The pressing sleeve (33) is made of metal with anti-slip texture, which enhances friction and prevents the film material from shifting. In summary, this device achieves high-precision, bubble-free bonding of the protective film for curved screens through mechanical flexible pressing, intelligent height adjustment, and heating assistance. It is suitable for screens of different sizes and curvatures, improving production efficiency and yield.

Claims

1. A film-applying device for producing curved screens, characterized in that, include: A cross frame (2), a first mounting base (7), and support frames (1) are provided at both ends of the first mounting base (7); the first mounting base (7) is fixed on the cross frame (2), and a first sleeve (6) is provided at both ends of the first mounting base (7); Guide rod (5), the guide rod (5) is inserted in the first sleeve (6), the top end of which is fixed with a top plate (9), and the bottom end of which is installed with a rotatable pressure rod (3). The lifting cylinder (8) is fixed in the middle of the first mounting base (7), and its piston rod is connected to the first top plate (10). The first top plate (10) is in contact with the bottom center of the top plate (9).

2. The film-applying device for producing curved screens according to claim 1, characterized in that, The top of the top plate is provided with a first connecting rod (11), which passes through the top plate and is fixed to the first top plate (10); a spring (12) is sleeved on the first connecting rod (11), and a second top plate (13) is provided at the bottom of the spring (12). The bottom of the first connecting rod (11) passes through the second top plate (13) and the top plate (9) and is fixed to the first top plate (10).

3. The film-applying device for producing curved screens according to claim 1, characterized in that, The pressure bar (3) includes a roller (31), and the two ends of the roller (31) are rotatably connected to the guide rod (5) through the connector (4). The roller (31) is fitted with a first flexible pressure ring (32), a pressing sleeve (33), and a second flexible pressure ring (34) in sequence.

4. The film-applying device for producing curved screens according to claim 3, characterized in that, The top of the connector (4) is fixed to the bottom of the guide rod (5), and the side of the connector (4) is connected to the end of the roller (31) through a bearing.

5. The film-applying device for producing curved screens according to claim 4, characterized in that, Both of the aforementioned support frames (1) are provided with height adjustment components on their sides, the height adjustment components including: Symmetrically arranged guide rails (15), the guide rails (15) are fixed to the support frame (1); The slider (14) is slidably engaged with the guide rail (15) and fixed to the crossbar (2); Nut seat (20), the nut seat (20) is located on the back of the support frame (1) and is threadedly engaged with the vertical lead screw (16); A lead screw (16) is fixed at both ends by a first bearing seat (18) and a second bearing seat (19); A drive motor (17) drives a lead screw (16) to rotate on a second bearing housing (19) via a coupling.

6. The film-applying device for producing curved screens according to claim 5, characterized in that, The first flexible pressure ring (32) and the second flexible pressure ring (34) are made of silicone rubber with a hardness of Shore A30-50. The pressing sleeve (33) is made of metal and has anti-slip texture on its surface.

7. The film-applying device for producing curved screens according to claim 3, characterized in that, The roller (31) is equipped with a heating element inside, and the temperature control range is 25-80℃.

8. The film-applying device for producing curved screens according to claim 5, characterized in that, The film application device also includes a PLC control system for coordinating the linkage operation of the lifting cylinder (8) and the drive motor (17).

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