A device for attaching a protective film to an acrylic plate
By introducing a rolling and limiting mechanism into the acrylic sheet coating device, the problems of sheet thickness adjustment and conveying deviation were solved, achieving efficient and precise protective film application and improving the finished quality of acrylic sheets.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- HUIMIN JINGQI DECORATION MATERIAL CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-26
Smart Images
Figure CN224409777U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of acrylic sheet processing technology, and in particular to a device for applying protective film to acrylic sheets. Background Technology
[0002] Acrylic sheets are actually a type of plexiglass sheet, made from methyl methacrylate monomers, i.e., polymethyl methacrylate acrylic sheet plexiglass. High-quality acrylic sheets are generally produced by casting. Cast acrylic sheets are mainly formed by adding various organic solvents to solid acrylic raw materials and then curing and polymerizing them. They can be molded in one piece, with precise dimensions and good internal quality, and can be mass-produced. In order to protect the surface gloss and flatness of the cast acrylic sheets from damage, a film coating treatment is required on the surface of the sheets after production.
[0003] According to Chinese Patent Publication No. CN216834460U, a coating device for acrylic sheet processing belongs to the field of acrylic sheet processing technology. It includes a coating cylinder and a drive shaft that is embedded in the coating cylinder through a bearing. This coating device for acrylic sheet processing can eliminate protective film bubbles during the coating process on the surface of the pressure plate, improve the coating effect of the acrylic sheet, facilitate the fixing of the protective film, and improve the stability of the protective film during the coating process.
[0004] However, the structural positions of the defoaming structure are fixed, which means that the position of the defoaming structure cannot be adjusted according to the thickness of the acrylic sheet, thus presenting certain limitations.
[0005] Chinese patent discloses a coating device for acrylic sheet processing (authorization announcement number CN222946211U). The patented technology is as follows: When it is necessary to defoam the acrylic sheet during coating, the operator can rotate the handle to drive the threaded column to rotate according to the thickness of the acrylic sheet, so that the position and height of the roller frame can be adjusted up and down. The pressure roller and the smoothing plate are adjusted to a suitable position, so that the coating mechanism can defoam the protective film on acrylic sheets of different thicknesses. The pressure roller can press down on the acrylic sheet to defoam the air bubbles in the protective film on the acrylic sheet. At the same time, the smoothing plate can push the air bubbles in the protective film to both sides of the acrylic sheet to defoam, thereby improving the defoaming effect of the protective film.
[0006] However, it has certain drawbacks: it lacks an effective conveying and limiting structure, which cannot prevent the acrylic sheet from shifting horizontally during the conveying process due to factors such as vibration and deviation. This shift will cause the acrylic sheet to be inaccurately positioned when it enters the lamination station, directly affecting the alignment of the protective film with the edge of the sheet, and thus causing quality problems such as bubbles, wrinkles, or even misalignment of the lamination area. In addition, the deviation in the lamination angle caused by the shift will also reduce the processing effect of the defoaming mechanism, ultimately affecting the finished product qualification rate. Utility Model Content
[0007] To address the shortcomings of existing technologies, this utility model provides a device for applying protective film to acrylic sheets, which solves the problems mentioned in the background.
[0008] To achieve the above objectives, this utility model is implemented through the following technical solution: a protective film applicator for acrylic sheets, comprising: a conveyor belt, a C-shaped frame fixedly connected to the front and rear edges of the upper surface of the conveyor belt, a telescopic cylinder fixedly connected to the upper surface of the C-shaped frame, a C-shaped plate fixedly connected to the telescopic end of the telescopic cylinder, and a film applicator roller rotatably connected to the front and rear inner surfaces of the C-shaped plate.
[0009] A leveling mechanism is provided at both the front and rear edges of the upper surface of the conveyor belt, and the leveling mechanism is located to the right of the C-frame.
[0010] The upper surface of the conveyor belt is provided with a limiting mechanism at both the front and rear edges. The limiting mechanism is located to the left of the C-shaped frame one and includes a C-shaped frame three. A C-shaped plate three is fixedly connected to the middle of the upper surface of the C-shaped frame three. A rotating rod is rotatably connected through the upper surface of the C-shaped plate three. A gear is fixedly connected to the lower end of the rotating rod. A rack is slidably connected to the upper surface of the C-shaped frame three on the inner side of the C-shaped plate three and on both sides of the gear. An L-shaped plate is fixedly connected to the opposite ends of the two racks. A limiting plate is fixedly connected to the lower end of the L-shaped plate. Multiple rollers are rotatably connected evenly from left to right inside the limiting plate. A ratchet is fixedly sleeved on the outside of the rotating rod above the C-shaped plate three. A positioning element is provided on the upper surface of the C-shaped plate three behind the rotating rod.
[0011] As a further technical solution of this utility model, the rolling mechanism includes a second C-shaped frame. A screw is threadedly connected to the upper surface of the second C-shaped frame. A lifting plate is rotatably connected to the lower end of the screw. Lifting rods are fixedly connected to both the front and rear sides of the upper surface of the lifting plate. A second C-shaped plate is installed below the lifting plate. Pressure rollers are rotatably connected to both the front and rear surfaces of the inner side of the second C-shaped plate. Slide rods are fixedly connected to both the front and rear ends of the upper surface of the second C-shaped plate. A spring is fixedly connected to the upper surface of the second C-shaped plate outside the slide rods.
[0012] As a further technical solution of this utility model, the positioning component includes a second spring, with a positioning block and a pawl fixedly connected to the rear end and front end of the second spring, respectively, and a positioning rod rotatably connected to the left end of the pawl.
[0013] As a further technical solution of this utility model, the C-shaped plate is located inside the C-shaped frame, the lower end of the C-shaped frame is fixed to the front and rear edges of the upper surface of the conveyor belt, the gear is meshed with the rack, and the limiting plate is located inside the C-shaped frame.
[0014] As a further technical solution of this utility model, the lower end of the second C-shaped frame is fixed to the front and rear edges of the upper surface of the conveyor belt, the lifting plate is located inside the second C-shaped frame, the lifting rod moves through the upper surface of the second C-shaped frame, the sliding rod moves through the lifting plate, and the upper end of the first spring is fixed to the lower surface of the lifting plate.
[0015] As a further technical solution of this utility model, the pawl is attached to the ratchet, and the positioning block and the positioning rod are both fixed to the upper surface of the C-shaped plate.
[0016] This utility model provides a device for applying protective film to acrylic sheets, which has the following advantages compared with the prior art:
[0017] 1. This design provides a protective film application device for acrylic sheets, equipped with a rolling mechanism. The elastic pressure provided by the spring drives the pressure roller to adhere to the surface of the acrylic sheet after film application. This ensures effective compaction of the protective film and removes air bubbles between the film and the acrylic sheet, while avoiding damage to the sheet or obstruction of conveying due to excessive pressure. The design of the screw and lifting plate allows the height of the pressure roller to be flexibly adjusted according to acrylic sheets of different thicknesses, significantly improving the adaptability of the device and the consistency of film application quality.
[0018] 2. This design provides a protective film application device for acrylic sheets. It allows for convenient and quick adjustment of the spacing between the two limiting plates according to the actual width of the acrylic sheet to be coated, ensuring the sheet maintains a straight line during transport. The device utilizes rollers on the inner side of the limiting plates to guide the acrylic sheet, significantly reducing frictional resistance during transport. The ratchet and pawl design effectively prevents the limiting plates from loosening or shifting due to vibration or other factors during operation, ensuring the positional accuracy of the acrylic sheet at the coating station and laying a solid foundation for accurate and flat application of the protective film. Attached Figure Description
[0019] Figure 1 This is a schematic diagram of a device for applying protective film to acrylic sheets.
[0020] Figure 2This is a schematic diagram of a rolling mechanism used in an acrylic sheet protective film application device.
[0021] Figure 3 This is a schematic diagram of a limiting mechanism used in an acrylic sheet protective film application device.
[0022] Figure 4 for Figure 3 A magnified view of A in the middle.
[0023] In the diagram: 1. Conveyor belt; 2. C-frame one; 3. Telescopic cylinder; 4. C-plate one; 5. Film applicator roller; 6. Rolling mechanism; 7. C-frame two; 8. Screw; 9. Lifting plate; 10. Lifting rod; 11. C-plate two; 12. Pressure roller; 13. Slide rod; 14. Spring one; 15. Limiting mechanism; 16. C-frame three; 17. C-plate three; 18. Rotating rod; 19. Gear; 20. Rack; 21. L-shaped plate; 22. Limiting plate; 23. Roller; 24. Ratchet; 25. Positioning component; 26. Spring two; 27. Positioning block; 28. Pawl; 29. Positioning rod. Detailed Implementation
[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.
[0025] Please see Figure 1-4 This utility model provides a technical solution for an acrylic sheet protective film application device: including a conveyor belt 1, a C-shaped frame 2 fixedly connected to the front and rear edges of the upper surface of the conveyor belt 1, a telescopic cylinder 3 fixedly connected to the upper surface of the C-shaped frame 2, a C-shaped plate 4 fixedly connected to the telescopic end of the telescopic cylinder 3, the C-shaped plate 4 being located inside the C-shaped frame 2, and a film application roller 5 rotatably connected to the front and rear surfaces of the inner side of the C-shaped plate 4.
[0026] Conveyor belt 1 is used to transport acrylic sheets from left to right;
[0027] The telescopic cylinder 3 is preferably a servo electric cylinder, which is used to drive the film-applying roller 5 to descend close to the acrylic plate;
[0028] The outer side of the film-applying roller 5 is wrapped with a protective film. When the acrylic sheet is conveyed to the vicinity of the film-applying roller 5, the operator can manually press one end of the protective film onto one end of the surface of the acrylic sheet. As the acrylic sheet moves continuously, its surface will be completely covered with the protective film.
[0029] The film-applying mechanism consisting of C-shaped frame 2, telescopic cylinder 3, C-shaped plate 4 and film-applying roller 5 is existing technology. It is similar to the film-applying mechanism in Chinese Patent A Film-Applying Device for Acrylic Sheets (Authorization Announcement No. CN220075574U). For specific working principles, please refer to its instruction manual.
[0030] A film-cutting mechanism can be installed on the right side of the film-applying mechanism to cut the applied protective film so that the next acrylic sheet can be filmed; manual cutting can also be used.
[0031] like Figure 1 and Figure 2 As shown, a leveling mechanism 6 is provided at both the front and rear edges of the upper surface of the conveyor belt 1. The leveling mechanism 6 is located to the right of the C-frame 2. The leveling mechanism 6 includes a C-frame 2 7. The lower end of the C-frame 2 7 is fixed to both the front and rear edges of the upper surface of the conveyor belt 1. A screw 8 is threaded through the upper surface of the C-frame 2 7. A lifting plate 9 is rotatably connected to the lower end of the screw 8. The lifting plate 9 is located inside the C-frame 2 7. The upper surface of the lifting plate 9 is fixed at both the front and rear edges of the screw 8. A lifting rod 10 is connected, which moves through the upper surface of the C-shaped frame 7. A C-shaped plate 11 is installed below the lifting plate 9. The inner front and rear surfaces of the C-shaped plate 11 are rotatably connected to a pressure roller 12. Slide rods 13 are fixed to both the front and rear ends of the upper surface of the C-shaped plate 11. Slide rods 13 move through the lifting plate 9. A spring 14 is fixed to the upper surface of the C-shaped plate 11 outside the slide rod 13. The upper end of the spring 14 is fixed to the lower surface of the lifting plate 9.
[0032] When the pressure roller 12 is applied to the acrylic sheet, it applies a certain pressure to the acrylic sheet through the spring 14, so that the protective film is tightly applied to the acrylic sheet and the air bubbles between the protective film and the acrylic sheet are squeezed out. This pressure will not affect the normal movement of the acrylic sheet.
[0033] Rotating screw 8 can drive lifting plate 9 to rise or fall, thereby adjusting the height of pressure roller 12, which is suitable for acrylic sheets of different thicknesses;
[0034] The screw 8 and the lifting plate 9 can be rotatably connected by bearings.
[0035] like Figure 1 , Figure 3 and Figure 4As shown, a limiting mechanism 15 is provided at both the front and rear edges of the upper surface of the conveyor belt 1. The limiting mechanism 15 is located to the left of the C-shaped frame 2, and includes a C-shaped frame 3 16. The lower end of the C-shaped frame 3 16 is fixed to the front and rear edges of the upper surface of the conveyor belt 1. A C-shaped plate 3 17 is fixed at the middle position of the upper surface of the C-shaped frame 3 16. A rotating rod 18 is rotatably connected through the upper surface of the C-shaped plate 3 17. A gear 19 is fixedly connected to the lower end of the rotating rod 18. A rack 20 is slidably embedded in the upper surface of the C-shaped frame 3 16, which is located inside the C-shaped plate 3 17 and on both sides of the gear 19. The gear 19 is meshed with the rack 20. The opposite ends of the two racks 20 are... An L-shaped plate 21 is fixedly connected to the bottom of the L-shaped plate 21. A limiting plate 22 is fixedly connected to the bottom of the L-shaped plate 21. The limiting plate 22 is located inside the C-shaped frame 16. Multiple rollers 23 are evenly connected to the inside of the limiting plate 22 from left to right. A ratchet 24 is fixedly sleeved on the outside of the rotating rod 18 above the C-shaped plate 17. A positioning component 25 is provided on the upper surface of the C-shaped plate 17 behind the rotating rod 18. The positioning component 25 includes a spring 26. A positioning block 27 and a pawl 28 are fixedly connected to the rear end and front end of the spring 26, respectively. The pawl 28 is attached to the ratchet 24. A positioning rod 29 is rotatably connected to the left end of the pawl 28. The positioning block 27 and the positioning rod 29 are both fixedly connected to the upper surface of the C-shaped plate 17.
[0036] The rotating rod 18 and the C-shaped plate 17 can be rotatably connected by a bearing;
[0037] The limiting plate 22 has multiple mounting holes. Each roller 23 is press-fitted with a miniature ball bearing at both ends and then inserted into the hole with an interference fit. The roller 23 protrudes from the front and rear surfaces of the limiting plate 22.
[0038] The rollers 23 on the two limiting plates 22 respectively fit the front and rear surfaces of the acrylic sheet to limit the acrylic sheet so that it will not shift due to vibration or other factors during transportation, thus avoiding affecting the subsequent film application quality.
[0039] The lower surface of the limiting plate 22 is higher than the conveying surface of the conveyor belt 1;
[0040] Rotating the lever 18 clockwise causes the two racks 20 to move relative to each other under the action of the gear 19, thereby causing the two limiting plates 22 to move closer to each other; rotating the lever 18 counterclockwise causes the two racks 20 to move away from each other under the action of the gear 19, thereby causing the two limiting plates 22 to move further away from each other; through the above operation, it is easy to adjust the distance between the two limiting plates 22.
[0041] Pad 28 engages with ratchet 24, allowing ratchet 24 and lever 18 to rotate clockwise normally, but not counterclockwise. When pad 28 is pulled away from ratchet 24, ratchet 24 and lever 18 can rotate counterclockwise. The cooperation between pad 28 and ratchet 24 ensures that the two limiting plates 22 in the acrylic plate limiting mechanism will not loosen or open.
[0042] The working principle of this utility model is as follows: First, adjust the limiting mechanism 15 according to the size of the acrylic sheet. Drive the gear 19 by rotating the rotating rod 18 clockwise, so that the two racks 20 drive the L-shaped plate 21 and the limiting plate 22 to move towards each other to a suitable distance. The pawl 28 and the ratchet 24 cooperate to lock the rotating rod 18 to prevent loosening. Place the acrylic sheet on the conveyor belt 1, and limit and guide its front and rear sides by the rollers 23 on the limiting plate 22. Start the conveyor belt 1 to transport the acrylic sheet to the right. The telescopic cylinder 3 drives the C-shaped plate 4 in advance. The film-applying roller 5 descends to its lowest position; when the right end of the acrylic sheet moves close to the film-applying roller 5, the operator manually presses the end of the protective film onto the right end surface of the acrylic sheet; as the acrylic sheet continues to move to the right, the protective film wrapped on the film-applying roller 5 is automatically applied to the upper surface of the sheet; after the film is applied, the protective film is cut manually or by the film-cutting mechanism; the acrylic sheet with the protective film applied continues to move to the right and enters the rolling mechanism 6, where the pressure roller 12 presses the surface of the sheet under the action of the spring 14, compacting the protective film and squeezing out air bubbles, thus completing the application.
[0043] The above description is merely a preferred embodiment of this utility model. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this utility model, and these improvements and modifications should also be considered within the scope of protection of this utility model. Structures, devices, and operating methods not specifically described or explained in this utility model are implemented according to conventional methods in the art, unless otherwise specified or limited.
Claims
1. A device for applying protective film to acrylic sheets, characterized in that, Includes a conveyor belt (1), and a C-shaped frame (2) is fixedly connected to the front and rear edges of the upper surface of the conveyor belt (1). A telescopic cylinder (3) is fixedly connected to the upper surface of the C-shaped frame (2). A C-shaped plate (4) is fixedly connected to the telescopic end of the telescopic cylinder (3). A film-applying roller (5) is rotatably connected to the front and rear surfaces of the inner side of the C-shaped plate (4). A rolling mechanism (6) is provided on both the front and rear edges of the upper surface of the conveyor belt (1), and the rolling mechanism (6) is located to the right of the C-frame (2). Limiting mechanisms (15) are provided on both the front and rear edges of the upper surface of the conveyor belt (1). The limiting mechanisms (15) are located to the left of the C-shaped frame (2), and the limiting mechanisms (15) include a C-shaped frame (16). A C-shaped plate (17) is fixedly connected to the middle position of the upper surface of the C-shaped frame (16). A rotating rod (18) is rotatably connected through the upper surface of the C-shaped plate (17). A gear (19) is fixedly connected to the lower end of the rotating rod (18). The upper surface of the C-shaped frame (16) is located inside the C-shaped plate (17) and A rack (20) is slidably connected to both sides of the gear (19). An L-shaped plate (21) is fixed to the opposite end of each rack (20). A limiting plate (22) is fixed to the lower end of the L-shaped plate (21). Multiple rollers (23) are evenly connected to the inside of the limiting plate (22) from left to right. A ratchet (24) is fixedly sleeved on the outside of the rotating rod (18) above the C-shaped plate (17). A positioning element (25) is provided on the upper surface of the C-shaped plate (17) behind the rotating rod (18).
2. The device for applying protective film to acrylic sheets according to claim 1, characterized in that, The rolling mechanism (6) includes a C-shaped frame two (7), the upper surface of the C-shaped frame two (7) is threaded with a screw (8), the lower end of the screw (8) is rotatably connected with a lifting plate (9), the upper surface of the lifting plate (9) is fixedly connected with lifting rods (10) on both the front and rear sides of the screw (8), and a C-shaped plate two (11) is installed below the lifting plate (9). The inner front and rear surfaces of the C-shaped plate two (11) are rotatably connected with pressure rollers (12), and the upper surface of the C-shaped plate two (11) is fixedly connected with slide rods (13) at both the front and rear ends. The upper surface of the C-shaped plate two (11) is fixedly connected with a spring one (14) outside the slide rod (13).
3. The device for applying protective film to acrylic sheets according to claim 1, characterized in that, The positioning component (25) includes a second spring (26), and a positioning block (27) and a pawl (28) are fixedly connected to the rear end and front end of the second spring (26), respectively. A positioning rod (29) is rotatably connected to the left end of the pawl (28).
4. The device for applying protective film to acrylic sheets according to claim 1, characterized in that, The C-shaped plate (4) is located inside the C-shaped frame (2), the lower end of the C-shaped frame (16) is fixed to the front and rear edges of the upper surface of the conveyor belt (1), the gear (19) is meshed with the rack (20), and the limiting plate (22) is located inside the C-shaped frame (16).
5. The device for applying protective film to acrylic sheets according to claim 2, characterized in that, The lower end of the second C-frame (7) is fixed to the front and rear edges of the upper surface of the conveyor belt (1). The lifting plate (9) is located inside the second C-frame (7). The lifting rod (10) moves through the upper surface of the second C-frame (7). The sliding rod (13) moves through the lifting plate (9). The upper end of the first spring (14) is fixed to the lower surface of the lifting plate (9).
6. The device for applying protective film to acrylic sheets according to claim 3, characterized in that, The pawl (28) is attached to the ratchet (24), and the positioning block (27) and the positioning rod (29) are both fixed to the upper surface of the C-shaped plate (17).