Glue coating device for optical protective film production

Abstract

The utility model relates to the technical field of optical protective film production, in particular to a glue coating device for optical protective film production, which comprises a case, notches for mounting two protective film rollers are formed in the left end and the right end of the case, and a limiting mechanism for rotatably mounting the protective film rollers is arranged on the case through the notches. A V-shaped tensioning mechanism which downwards tensions and supports the protective film is arranged in the middle of the machine box, and ventilation openings used for installing fans are symmetrically formed in the front side wall and the rear side wall of the machine box. According to the utility model, the notch, the mounting groove and the accommodating groove which are communicated are formed in the two sides of the case; and a wedge driven telescopic piece elastically supported by a second spring is arranged at the bottom end of the case, and an eccentric rod piece is driven by a driving motor to rotate, so that a wedge driving rod performs intermittent pressure driving on the wedge driven telescopic piece, glue is accelerated to be close to the middle of the case, and the extruded middle end part of the protective film is in full contact with the glue.

Description

Technical Field

[0001] This utility model relates to the field of optical protective film production technology, and in particular to an adhesive coating device for optical protective film production. Background Technology

[0002] Optical protective films refer to one or more layers of dielectric film, metal film, or a combination of both, deposited or coated on optical elements or independent substrates to alter the transmission characteristics of light waves, including light transmission, reflection, absorption, scattering, polarization, and phase change. Thin films such as brightness enhancement films and polarizers are commonly used optical protective films.

[0003] The current production process for optical protective films includes key steps such as filtration, coating, drying, PET film lamination, slitting, and packaging. Evenly coating the AB adhesive onto the polyester film, controlling the thickness and uniformity is particularly crucial. Existing methods, such as the protective film coating equipment disclosed in CN210304323U, use circulating pumps and circulation tanks to circulate the adhesive in the adhesive tank, facilitating the mixing of the adhesive scraped by the doctor blade and keeping the adhesive in a continuous state of motion to prevent partial solidification that could affect the coating process. However, existing protective films are long and thin, often requiring roller winding for storage and management. The crude immersion coating method easily leads to coating blind spots and can even cause overlapping layers of optical protective film, resulting in adhesive waste and increased risk of structural breakage, making it difficult to achieve a uniform and aesthetically pleasing coating process. Utility Model Content

[0004] The purpose of this invention is to solve the problem of uneven coating of optical protective films in the prior art, and to propose an adhesive coating device for the production of optical protective films.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An adhesive coating device for producing optical protective films includes a chassis. The chassis has slots at its left and right ends for mounting two protective film rollers, and the chassis has limiting mechanisms via these slots for rotating the protective film rollers. A tensioning mechanism in the middle of the chassis provides downward tension to support the protective film in a V-shape. A drive motor is fixedly mounted at the lower end of the chassis, and the chassis has a drive mechanism via the drive motor for gathering adhesive towards the middle. Ventilation openings for mounting fans are symmetrically provided on the front and rear side walls of the chassis.

[0007] Preferably, the chassis is a box structure with an open top, and the middle of the inside of the chassis is a boss-shaped protrusion.

[0008] Preferably, the limiting mechanism includes an installation slot and a storage slot located on the side of the slot opening. A drive cylinder and a guide rail are fixedly installed on the outer wall of the chassis. A lifting block that is fixedly connected to the drive cylinder is slidably installed on the guide rail. A swing arm that is rotatably pulled by the lifting block is rotatably installed on the outer wall of the chassis. A limiting member that is movably pulled by the swing arm and extends into the installation slot is movably installed in the storage slot.

[0009] Preferably, a traction link is connected between the lifting block and the lower end of the opening and closing swing rod by a pin, and a traction long hole is opened in the upper end of the opening and closing swing rod, and a traction bolt that is slidably fitted into the traction long hole is integrally connected to the limiting member.

[0010] Preferably, the tensioning mechanism includes guide vertical grooves symmetrically opened in the front and rear inner walls of the housing, a first spring and a lifting frame fixedly connected in the guide vertical grooves, and a tensioning roller for pressing the protective film downward is rotatably installed between the two lifting frames.

[0011] Preferably, the first spring is welded to the upper end of the guide groove, and the lifting frame is slidably installed in the guide groove, with the tensioning roller located below the two protective film rollers.

[0012] Preferably, the drive mechanism includes an eccentric rod fixedly connected to the output end of the drive motor, a right-angled elongated cavity is provided in the side wall of the housing, a wedge-head drive rod is slidably fitted in the lower opening of the right-angled elongated cavity and moves in contact with the eccentric rod, a second spring is welded inside the housing, and a wedge-head driven telescopic member is fixedly connected to the second spring and slidably fitted in the other opening of the right-angled elongated cavity and moves in contact with the wedge-head drive rod.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. This utility model uses a drive cylinder to move a lifting block up and down by opening a connecting slot, a mounting slot and a storage slot on both sides of the machine casing. The lifting block is moved up and down by a drive cylinder. The limiting component installed in the mounting slot and the storage slot is pulled and driven by a swing arm to limit the movement of the protective film roller installed in the slot through the mounting slot. Thus, the protective film roller is used to wind and release the protective film.

[0015] 2. This utility model has a lifting frame elastically supported by a first spring in the middle of the chassis. The lifting frame is used to install a tensioning roller located between two protective film rollers to press the protective film into a V-shaped structure and pass it through the chassis filled with glue.

[0016] 3. This utility model provides a wedge-head driven telescopic component at the bottom of the chassis, which is elastically supported by a second spring. The drive motor drives the eccentric rod to rotate, so that the wedge-head drive rod intermittently applies pressure to the wedge-head driven telescopic component, accelerating the glue to move towards the middle of the chassis, so that the middle part of the protective film is squeezed and fully contacts the glue. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the adhesive coating device for producing optical protective films according to the present invention.

[0018] Figure 2 This is a bottom view of an adhesive coating device for producing optical protective films according to this utility model;

[0019] Figure 3 This is a cross-sectional view of an adhesive coating apparatus for producing optical protective films according to the present invention.

[0020] Figure 4 This is a schematic diagram of the protective film roller structure of an adhesive coating device for producing optical protective films, as proposed in this utility model.

[0021] In the diagram: 1. Chassis; 2. Slot; 3. Mounting slot; 4. Storage slot; 5. Drive cylinder; 6. Guide rail; 7. Lifting block; 8. Opening and closing swing arm; 9. Limiting component; 10. Guide vertical slot; 11. First spring; 12. Lifting frame; 13. Tensioning roller; 14. Drive motor; 15. Eccentric rod; 16. Right-angle long cavity; 17. Wedge head drive rod; 18. Second spring; 19. Wedge head driven telescopic component; 20. Traction link; 21. Traction long hole; 22. Traction bolt; 23. Ventilation port. Detailed Implementation

[0022] 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.

[0023] Reference Figures 1-4An adhesive coating device for producing optical protective films includes a housing 1. The housing 1 has slots 2 at its left and right ends for mounting two protective film rollers. One roller, containing the protective film, is used to release the protective film in an orderly manner, while the other roller, during rotation, rewinds the released protective film. The housing 1 is equipped with a limiting mechanism via the slots 2 for rotating and mounting the protective film rollers. The limiting mechanism includes an mounting slot 3 and a receiving slot 4 located on the side of the slots 2. A drive cylinder 5 is fixedly mounted on the outer wall of the housing 1. The guide rail 6 has a lifting block 7 that is slidably mounted on it and fixedly connected to the drive cylinder 5. The outer wall of the housing 1 is rotatably mounted with a swing arm 8 that is movably pulled by the lifting block 7. The storage slot 4 has a limiting member 9 that is movably pulled by the swing arm 8 and extends into the mounting slot 3. It should be noted that the lower end face of the mounting slot 3 is a semi-circular slot structure, and the front end of the limiting member 9 corresponding to the end of the protective film roller is an arc plate structure. The two limit the movement of the end of the protective film roller, so that the protective film roller can only rotate in the mounting slot 3, realizing convenient disassembly and assembly of the protective film roller.

[0024] A V-shaped tensioning mechanism for downwardly tensioning and supporting the protective film is provided in the middle of the casing 1. The tensioning mechanism includes guide vertical grooves 10 symmetrically opened in the front and rear inner walls of the casing 1. A first spring 11 and a lifting frame 12 are fixedly connected in the guide vertical grooves 10. A tensioning roller 13 for downwardly pressing the protective film is rotatably installed between the two lifting frames 12. For details, please refer to the attached instruction manual. Figure 3 By passing the protective film under the tension roller 13, the tension roller 13 is made to press the protective film vertically downward by the tension of the first spring 11, so that the protective film always passes through the housing 1 in an orderly and taut state.

[0025] A drive motor 14 is fixedly mounted on the lower end of the chassis 1, and the chassis 1 is equipped with a drive mechanism via the drive motor 14 for gathering glue towards the center. The drive mechanism includes an eccentric rod 15 fixedly connected to the output end of the drive motor 14. A right-angled elongated cavity 16 is opened in the side wall of the chassis 1. A wedge-head drive rod 17, which slidably abuts against the eccentric rod 15, is slidably fitted in the lower opening of the right-angled elongated cavity 16. A second spring 18 is welded inside the chassis 1. A wedge-head driven telescopic member 19, which slidably abuts against the wedge-head drive rod 17, is fixedly connected to the second spring 18 and is slidably fitted in the other opening of the right-angled elongated cavity 16. A sealing gasket is fitted on the wedge-head driven telescopic member 19 to ensure the sealing of the upper opening of the right-angled elongated cavity 16. For details, please refer to the attached instruction manual. Figure 3 The chassis 1 is a box structure with an open top, and the middle of the inside of the chassis 1 is a boss-shaped protrusion. After the adhesive comes into contact with the protective film, it is very easy to settle and solidify in the chassis 1. The adhesive is repeatedly driven by the wedge-shaped driven telescopic component 19 that moves up and down, so that the adhesive gathers towards the protective film located in the middle of the chassis 1, ensuring that the protective film can fully contact the adhesive.

[0026] The front and rear side walls of the casing 1 are symmetrically provided with ventilation openings 23 for installing fans. It should be noted that the ventilation openings 23 are close to the protective film roller used to pull the protective film, so as to facilitate the blowing treatment of the protective film after the adhesive is applied. This can remove excess adhesive on the protective film by using wind power, and also accelerate the drying and shaping of the adhesive on the protective film.

[0027] A traction link 20 is connected between the lifting block 7 and the lower end of the opening and closing swing rod 8 by a pin. A traction long hole 21 is opened in the middle of the upper end of the opening and closing swing rod 8, and a traction bolt 22 is integrally connected to the limiting member 9 and slidably fitted in the traction long hole 21. Under the driving action of the driving cylinder 5, the limiting member 9 moves in opposite directions to facilitate the easy disassembly and assembly of the protective film roller.

[0028] The first spring 11 is welded to the upper end of the guide vertical groove 10, and the lifting frame 12 is slidably installed in the guide vertical groove 10. The tensioning roller 13 is located below the two protective film rollers so as to elastically press the protective film passing through the machine box 1 so that the protective film passes through in a V-shaped structure.

[0029] It should be noted that the specific models and specifications of the drive cylinder 5 and drive motor 14 need to be selected and determined according to the actual specifications of the device. The specific selection and calculation method adopts the existing technology in this field, so it will not be elaborated here.

[0030] The functional principle of this utility model can be explained through the following operation methods:

[0031] The protective film roller used for releasing and pulling the protective film is placed at the slot 2 position, so that the end of the protective film roller is located in the mounting slot 3;

[0032] The control drive cylinder 5 operates, causing the lifting block 7 to move upward along the guide rail 6, and the opening and closing swing rod 8 to deflect so as to drive the limiting part 9 to extend into the mounting groove 3, thereby limiting the end of the protective film roller so that the protective film roller can only rotate in the mounting groove 3.

[0033] The protective film on one protective film roller passes under the tension roller 13 and is fixedly connected to another protective film roller;

[0034] The drive motor 14 is turned on, causing the eccentric rod 15 to rotate, which intermittently squeezes the wedge drive rod 17, causing the wedge driven telescopic member 19 to repeatedly rise and fall inside the housing 1, so as to drive the glue to gather in the middle of the housing 1, thereby making the protective film passing through the housing 1 fully contact the glue.

[0035] During the process of stretching the protective film after it is coated with glue, a fan blows air to accelerate the drying and setting of the glue.

[0036] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An adhesive coating apparatus for producing optical protective films, comprising a chassis (1), characterized in that, The casing (1) has slots (2) at both ends for installing two protective film rollers, and the casing (1) is provided with a limiting mechanism for rotating and installing the protective film rollers through the slots (2). The casing (1) is provided with a tensioning mechanism in the middle to tension and support the protective film in a V shape. The casing (1) is fixedly installed with a drive motor (14) at the lower end, and the casing (1) is provided with a drive mechanism for gathering glue in the middle position through the drive motor (14). The casing (1) has symmetrical ventilation openings (23) for installing fans in the front and rear side walls.

2. The adhesive coating apparatus for producing optical protective films according to claim 1, characterized in that, The chassis (1) is a box structure with an open top, and the middle of the interior of the chassis (1) is a boss-shaped protrusion.

3. The adhesive coating apparatus for producing optical protective films according to claim 1, characterized in that, The limiting mechanism includes an installation slot (3) and a storage slot (4) located on the side of the slot (2). A drive cylinder (5) and a guide rail (6) are fixedly installed on the outer wall of the chassis (1). A lifting block (7) that is fixedly connected to the drive cylinder (5) is slidably installed on the guide rail (6). A swing arm (8) that is movably pulled by the lifting block (7) is rotatably installed on the outer wall of the chassis (1). A limiting member (9) that is movably pulled by the swing arm (8) and extends into the installation slot (3) is movably installed in the storage slot (4).

4. The adhesive coating apparatus for producing optical protective films according to claim 3, characterized in that, The lifting block (7) and the lower end of the opening and closing swing rod (8) are connected by a traction link (20). The upper end of the opening and closing swing rod (8) is provided with a traction long hole (21), and the limiting member (9) is integrally connected with a traction bolt (22) that is slidably fitted in the traction long hole (21).

5. The adhesive coating apparatus for producing optical protective films according to claim 1, characterized in that, The tensioning mechanism includes guide vertical grooves (10) symmetrically opened in the front and rear inner walls of the housing (1). A first spring (11) and a lifting frame (12) are fixedly connected in the guide vertical grooves (10). A tensioning roller (13) for pressing the protective film downward is rotatably installed between the two lifting frames (12).

6. The adhesive coating apparatus for producing optical protective films according to claim 5, characterized in that, The first spring (11) is welded to the upper end of the guide vertical groove (10), and the lifting frame (12) is slidably installed in the guide vertical groove (10). The tensioning roller (13) is located below the two protective film rollers.

7. The adhesive coating apparatus for producing optical protective films according to claim 1, characterized in that, The drive mechanism includes an eccentric rod (15) fixedly connected to the output end of the drive motor (14). A right-angled elongated cavity (16) is provided in the side wall of the housing (1). A wedge-head drive rod (17) that slidably abuts against the eccentric rod (15) is slidably fitted in the lower opening of the right-angled elongated cavity (16). A second spring (18) is welded inside the housing (1). A wedge-head driven telescopic member (19) that slidably abuts against the wedge-head drive rod (17) is fixedly connected to the second spring (18) and is slidably fitted in the other opening of the right-angled elongated cavity (16).

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