Light-shielding film and light-shielding film production device

Abstract

The present application relates to a light-shielding film and a light-shielding film production device, belonging to the technical field of optical devices. A light-shielding film includes a light-shielding film body, the light-shielding film body includes a PET film, a black coating layer is provided on one side of the PET film, an adhesive layer is provided on the side of the PET film away from the black coating layer, and a protective layer is also provided on the side of the black coating layer away from the PET film to reduce the damage of the black coating layer on one side of the PET film before use. The present application also discloses a light-shielding film production device, which has the advantage of reducing the workload of workers in the process of producing the light-shielding film.

Description

Technical Field

[0001] The present application relates to the technical field of optical devices, and in particular to a light-shielding film and a light-shielding film production device. Background Art

[0002] When strong direct light outside the shooting range shines on the lens surface of the photographic lens, some stray light will be projected onto the film due to the reflection of light by the outer surface of the lens and the multiple internal mirrors. This will at the very least reduce the contrast and clarity of the image, and at worst produce halos and light spots, destroying the harmony of the picture and failing to achieve the expected effect. The role of the light-shielding film is to allow only the required imaging light to enter the photographic lens and effectively prevent interference from light outside the shooting range.

[0003] The production process of the light-shielding film mainly uses the PET film as the basis, and then the layer structure required to be adhered to the PET film is gradually adhered to the PET film from different solution states through production equipment. After that, the solution and the PET film are heated to form a layer structure adhered to the PET film. Due to the difference in solutions, layer structures with different functions can be formed.

[0004] The working principle of the currently used light-shielding film is to coat a black paint layer on the side of the PET film facing the light source. The black paint absorbs light, thereby reducing the influence of stray light on the film quality. A glue layer for adhering to the lens frame is coated on the other side of the PET film, so that the light-shielding film as a whole can be adhered to the lens frame.

[0005] However, during the transportation and installation of the light-shielding film, the black coating layer on one side of the PET film may be damaged due to misoperation by the staff, making it difficult for the light-shielding film to fully absorb external stray light.

[0006] Therefore, it is necessary to add a layer structure to protect the black paint layer on one side of the light-shielding film, which may make it difficult to control the thickness of the black paint layer. If the black paint layer is too thick, although it increases the tolerance for later wear, it may cause installation difficulties or affect the normal use of the light-shielding film. If the black paint layer of the light-shielding film is set too thin, it is easy to cause wear due to external influences during transportation and installation, making the thickness of the black paint layer difficult to control. At present, there is still no appropriate equipment to accurately control the thickness of the black paint layer of the light-shielding film. Summary of the invention

[0007] In order to reduce the damage of the black coating layer on one side of the PET film before use, the present application provides a light-shielding film and a light-shielding film production device.

[0008] In a first aspect, the present application provides a light-shielding film, which adopts the following technical solution:

[0009] A shading film comprises a shading film body, wherein the shading film body comprises a PET film, a black coating layer is provided on one side of the PET film, an adhesive layer is provided on the side of the PET film away from the black coating layer, and a protective layer is also provided on the side of the black coating layer away from the PET film.

[0010] By adopting the above technical solution, due to the presence of the protective layer, the wear of the black paint layer caused by the staff's misoperation during transportation and installation is reduced, thereby affecting the subsequent light absorption and shading effects of the shading film body.

[0011] Optionally, a heat insulation layer is provided between the black paint layer and the PET film.

[0012] By adopting the above technical solution, during long-term outdoor work, when light is irradiated on the black paint layer for a long time, the black paint layer absorbs a large amount of light for a long time, causing the temperature to rise. Due to the presence of the heat insulation layer, it is difficult for the heat to be conducted to the PET film, thereby reducing the adhesive layer being in a heated state for a long time, making it difficult for the adhesive layer to adhere to the PET film and the lens frame, thereby causing the PET film to fall off the lens frame.

[0013] In a second aspect, the present application provides a light-shielding film production device, which adopts the following technical solution:

[0014] A light-shielding film production device comprises a feeding roller and a receiving roller, wherein two guide rollers which are spaced apart and have adjustable temperatures are arranged between the feeding roller and the receiving roller, a constant-temperature coating roller is arranged on the lower side of the middle position between the two guide rollers, the coating roller is staggered with the two guide rollers, a liquid pool is arranged on the lower side of the coating roller, the lower side of the coating roller can abut against the solution inside the liquid pool, a scraper is arranged on the side of the coating roller away from the feeding roller, and a heating box is arranged between the guide roller close to the receiving roller and the receiving roller.

[0015] By adopting the above technical scheme, in the process of producing the shading film body, the black coating layer is formed from an initial solution state, adhered to the PET film, and then heated. Therefore, at the beginning of the processing, it is necessary to first drive the feed roller to discharge the material during the rotation by an external drive. When the PET film discharged from the feed roller passes through the two guide rollers and the coating roller, the temperature of the two guide rollers is adjusted so that the temperature of the two guide rollers is lower than that of the coating roller, so that the temperature of the PET film close to the coating roller is higher than the temperature of the side away from the coating roller. The two guide rollers and the coating roller carry the PET film in the process of rotation. The PET film continues to move, and the coating roller gradually adheres the solution in the liquid holding pool to the side wall of the coating roller during the rotation process. The coating roller first contacts the scraper during the rotation process. After the coating roller contacts the scraper, the solution adhered to the side wall of the coating roller is scraped flat by the scraper. Then the coating roller carries the solution and contacts the PET film. Due to the temperature difference on both sides of the PET film, the solution adheres to the PET film when it contacts the PET film. After that, the PET film is heated by the heating box and moves to the receiving roller for receiving, thereby realizing the production process of the black coating layer on the PET film.

[0016] Optionally, the two guide rollers and the outer covers of the coating roller and the liquid containing pool are provided with a coating box, and the coating box is connected to a driving component capable of driving the scraper to move toward or away from the coating roller.

[0017] By adopting the above technical solution, due to the presence of the driving component, the distance between the scraper and the coating roller can be adjusted according to the thickness of the solution required to adhere to the PET film, thereby reducing the difficulty of the device in adhering black coating layers of different thicknesses to the PET film.

[0018] Optionally, the driving assembly includes a driving motor, the output shaft of the driving motor is drivingly connected to a driving gear, one side of the driving gear is meshed with a connecting gear, one side of the connecting gear is fixedly connected to a driving screw, the driving screw is connected to the scraper and can drive the scraper to move along the length direction of the driving screw.

[0019] By adopting the above technical solution, when the relative position between the scraper and the coating roller needs to be adjusted, the drive motor is started, and the drive motor drives the drive gear to rotate. During the rotation, the drive gear drives the meshed connecting gear to rotate. During the rotation, the connecting gear drives the connected drive screw to rotate. During the rotation, the drive screw drives the connected scraper to move, thereby realizing the process of driving the scraper to move through the drive assembly.

[0020] Optionally, the driving assembly is connected to the two guide rollers, and the driving assembly can simultaneously drive the two guide rollers to move up and down while driving the scraper to move.

[0021] By adopting the above technical solution, since the guide roller can also be driven by the driving component, during actual use, the driving component drives the two guide rollers to move upward away from the coating roller while driving the scraper to move away from the coating roller, so that the outer side of the coating roller can adhere to a thicker solution and thus adhere to the PET film, and also reduces the process in which the coating roller is squeezed by the PET film during the contact with the PET film due to the close distance between the guide roller and the coating roller, so that the solution on the coating roller overflows to the surrounding during the squeezing process, making it difficult to adhere a solution layer of a certain thickness to the PET film.

[0022] Optionally, one end of the driving screw away from the connecting gear is fixedly connected to a driving bevel gear, the driving bevel gear is meshed with a driven bevel gear, the driven bevel gear fixing sleeve is provided with an active screw, and the active screw is connected to the two guide rollers at the same time and can drive the two guide rollers to move at the same time.

[0023] By adopting the above technical solution, in the process of the driving motor driving the driving screw to rotate, the driving screw drives the driving bevel gear to rotate, the driving bevel gear drives the driven bevel gear to rotate during the rotation, the driven bevel gear drives the active screw to rotate during the rotation, and the active screw drives the two connected guide rollers to move during the rotation, thereby realizing the process in which the driving component can simultaneously drive the scraper and the two guide rollers to move.

[0024] Optionally, a liquid pushing plate is provided inside the liquid containing pool, and a plurality of pressure springs are connected between the bottom of the liquid pushing plate and the inner bottom wall of the liquid containing pool. The liquid pushing plate is gradually inclined upward along the middle direction toward the feeding roller or the receiving roller, and the liquid pushing plate can isolate the solution inside the liquid containing pool on the upper side of the liquid pushing plate.

[0025] By adopting the above technical solution, due to the presence of the liquid pushing plate, when the solution inside the liquid holding tank is reduced during use, the pressure spring at the bottom of the liquid pushing plate can drive the liquid pushing plate to move upward, so that the coating roller can still adhere to the solution inside the liquid holding tank, thereby reducing the solution at the bottom of the liquid holding tank from being difficult to utilize and causing the waste of solution.

[0026] Optionally, a portion of the side wall of the liquid containing pool located above the liquid pushing plate is connected to a liquid inlet pipe, and a side of the liquid inlet pipe located inside the liquid containing pool is provided with an opening and closing door capable of blocking the pipe mouth of the liquid inlet pipe, and the opening and closing door is connected to the liquid pushing plate and can open and close the pipe mouth of the liquid inlet pipe under the drive of the liquid pushing plate.

[0027] By adopting the above technical solution, since the liquid holding pool is connected to a liquid inlet pipe capable of injecting solution into the liquid holding pool, and an opening and closing door is also provided at the pipe mouth of the liquid inlet pipe at one end inside the liquid holding pool, and the opening and closing door can be opened and closed under the drive of the liquid pushing plate, when the solution inside the liquid holding pool is reduced and the liquid pushing plate rises, the liquid pushing plate can control the opening and closing door to open, so that the external solution can be injected into the liquid holding pool, thereby reducing the need for staff to observe the remaining solution inside the liquid holding pool and add the solution to the liquid holding pool in time. The labor process.

[0028] Optionally, a driving rack is fixedly connected to one side of the liquid pushing plate, an opening and closing gear is meshed on one side of the driving rack, the opening and closing gear is fixedly connected to the opening and closing door, and the opening and closing door can rotate under the drive of the opening and closing gear.

[0029] By adopting the above technical solution, during the upward movement of the liquid pushing plate, the liquid pushing plate drives the driving rack to move upward, and the driving rack drives the opening and closing gear to rotate during the upward movement, and the opening and closing gear drives the opening and closing door to rotate during the rotation, thereby realizing the opening operation of the opening and closing door. When the liquid pushing plate moves downward, the liquid pushing plate can drive the opening and closing gear to rotate in the opposite direction, thereby realizing the closing operation of the opening and closing door.

[0030] In summary, the present application includes at least one of the following beneficial technical effects:

[0031] By providing a protective layer and a heat-insulating layer on both sides of the black paint layer, it is possible to protect the black paint layer while reducing the phenomenon that the black paint layer conducts heat to the adhesive layer to affect the adhesion of the light-shielding film body and the lens frame.

[0032] By providing a driving assembly that can simultaneously drive the scraper and the two guide rollers to move, it is possible to adjust the solution of different thicknesses to be coated, so that the device can adapt to more working conditions;

[0033] By providing a liquid pusher plate, which can also control whether the liquid inlet pipe on one side injects solution into the liquid tank, the solution inside the liquid tank can be automatically replenished during the working process, thereby reducing the working pressure of the staff who need to monitor the remaining solution inside the liquid tank. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 is a schematic diagram of the structure of the light-shielding film body according to an embodiment of the present application;

[0035] Figure 2 It is a schematic diagram of the overall structure of a light-shielding film production device according to an embodiment of the present application;

[0036] Figure 3 is a cross-sectional view of the overall structure of a light-shielding film production device according to an embodiment of the present application;

[0037] Figure 4 It is a cross-sectional view of a driving component of a light-shielding film production device according to an embodiment of the present application.

[0038] Description of reference numerals: 1, light-shielding film body; 11, PET film; 12, black coating layer; 13, adhesive layer; 14, protective layer; 15, heat-insulating layer; 2, feeding roller; 3, guide roller; 31, connecting plate; 4, receiving roller; 5, coating roller; 51, scraper; 511, connecting block; 6, liquid storage tank; 61, liquid pushing plate; 611, baffle; 62, pressure spring; 63, liquid inlet pipe; 64, opening and closing door; 65, rotating shaft; 66, opening and closing gear; 6 7. Driving rack; 671. Driving block; 7. Heating box; 8. Coating box; 81. Feed port; 82. Discharge port; 83. Scraper shift port; 84. Guide slide; 85. Push plate slide; 9. Driving assembly; 91. Driving motor; 92. Driving sprocket; 93. Connecting sprocket; 931. Connecting chain; 94. Driving gear; 95. Connecting gear; 96. Driving screw; 97. Driving bevel gear; 98. Driven bevel gear; 99. Active screw. DETAILED DESCRIPTION

[0039] The following is combined with Figure 1 -Attached Figure 4 This application is described in further detail.

[0040] The present application embodiment discloses a light shielding film. Figure 1 The light-shielding film body 1 includes a PET film 11, a black coating layer 12 is coated on one side of the PET film 11, and an adhesive layer 13 is coated on the side of the PET film 11 away from the black coating layer 12. A heat-insulating layer 15 may be provided between the black coating layer 12 and the PET film 11, and a protective layer 14 is coated on the side of the black coating layer 12 away from the heat-insulating layer 15.

[0041] The protective layer 14 can protect the black paint layer 12, so that the black paint layer 12 can fully absorb and block light. The light shielding film is in a circular shape during use and is arranged on the viewfinder frame of the optical lens.

[0042] A heat insulating layer 15 is provided between the PET film 11 and the black coating layer 12. The heat insulating layer 15 has the function of dispersing heat and inhibiting the PET film 11 from deforming, thereby preventing the annular light-shielding film from wrinkling and deforming during use.

[0043] During actual use, due to the presence of the heat insulation layer 15, the heat absorbed by the black paint layer 12 under light can be isolated by the heat insulation layer 15 on the side away from the PET film 11, and evenly dispersed in the corresponding black paint layer 12 which is also a circular ring, so that the heat is difficult to be conducted to the adhesive layer 13, so that the adhesive layer 13 can stably adhere the shading film body 1 and the lens frame.

[0044] Reference Figure 2 and Figure 3 The embodiment of the present application also discloses a light-shielding film production device, including a feed roller 2, and two horizontally arranged guide rollers 3 are provided on one side of the feed roller 2. The two guide rollers 3 are arranged parallel to the feed roller 2, and the two feed rollers 2 are arranged at a distance from each other. Each guide roller 3 is connected to a temperature regulating device, and the temperature regulating device is composed of a heater and a refrigerator. Since it is a prior art, it is not shown in the figure. A receiving roller 4 is also provided on the side of the two guide rollers 3 away from the feed roller 2, and the receiving roller 4 is arranged parallel to the feed roller 2. The upper end surfaces of the receiving roller 4 and the feed roller 2 are both located on the upper side of the lower end surfaces of the two horizontally arranged guide rollers 3.

[0045] A coating roller 5 is also provided at the lower side of the middle position of the two guide rollers 3. The coating roller 5 is arranged parallel to the two guide rollers 3, and the upper end surface of the coating roller 5 is arranged higher than the lower end surfaces of the two guide rollers 3. The coating roller 5 is connected to a constant temperature device, which also adopts an existing heating device, so it is not shown in the figure. A liquid tank 6 is provided at the lower side of the coating roller 5. The length of the liquid tank 6 is longer than the length of the coating roller 5, so that one side of the coating roller 5 can be immersed in the solution of the liquid tank 6. A scraper 51 is provided on the side of the coating roller 5 away from the feeding roller 2. The blade of the scraper 51 is arranged close to the side of the coating roller 5, and the scraper 51 is arranged parallel to the coating roller 5.

[0046] The feed roller 2, two guide rollers 3, the receiving roller 4 and the coating roller 5 are all connected to motors, each of which can drive the connected feed roller 2, guide roller 3, receiving roller 4 or coating roller 5 to rotate, and the above-mentioned motors are not shown in the figure.

[0047] A heating box 7 is also provided between one of the guide rollers 3 close to the receiving roller 4 and the receiving roller 4, including a box body and electric heating wires arranged inside the box body. Since the heating box 7 composed of the box body and the electric heating wire is also a prior art, it is not shown in the figure.

[0048] In the process of producing the shading film, the material required for the black coating layer to be adhered to the PET film needs to be made into a solution first, and then different black coating layers are selected and placed in the liquid holding pool 6 on the lower side of the coating roller 5 according to the types of different black coating layers that need to be adhered to the PET film.

[0049] Then, multiple motors are started so that the PET film 11 on the feed roller 2 can gradually rotate out from the feed roller 2 during the rotation of the feed roller 2, and then the PET film 11 can pass through the gap between the two guide rollers 3 and the coating roller 5, and then the PET film 11 passes through the heating box 7 and rotates to the receiving roller 4 for the receiving operation.

[0050] When the PET film 11 passes through the coating roller 5, the coating roller 5 gradually adheres the solution in the liquid storage tank 6 to the coating roller 5 while rotating. Then, when the coating roller 5 rotates, the solution on the coating roller 5 contacts the scraper 51, so that the scraper 51 can scrape the solution adhered to the coating roller 5. After passing through the scraper 51, the coating roller 5 contacts the PET film 11, and the temperature of the two guide rollers 3 is adjusted so that the temperature of the two guide rollers 3 is lower than the temperature of the coating roller 5, so that there is a temperature difference on both sides of the PET film 11, thereby realizing the process of adhering the solution in the liquid storage tank 6 to the PET film 11.

[0051] By providing the scraper 51 , it is possible to reduce the occurrence of the phenomenon that the thickness of the solution adhered to the PET film 11 is uneven due to the uneven adhesion of the solution on the coating roller 5 , thereby affecting the quality of the subsequent finished product.

[0052] The device also includes a coating box 8, which can cover two guide rollers 3, a coating roller 5 and a liquid containing pool 6, and each end of the two guide rollers 3 and the coating roller 5 is plugged into the adjacent side wall of the coating box 8 and is rotatably connected to the side wall of the coating box 8. A feeding port 81 for the PET film 11 to enter the coating box 8 is provided on the side of the coating box 8 close to the feeding roller 2, and a discharging port 82 for the PET film 11 in the coating box 8 to pass through the coating box 8 is provided on the side of the coating box 8 close to the receiving roller 4.

[0053] The coating box 8 is connected to a driving assembly 9 , which is connected to the scraper 51 , and the driving assembly 9 can drive the scraper 51 to move toward or away from the coating roller 5 .

[0054] In actual use, since the properties and functions of the solutions required to adhere to the PET film 11 are different, the thicknesses of the solutions required to adhere to the PET film 11 will be different. Therefore, when it is necessary to adjust the thickness of the solution adhered to the PET film 11, the drive component 9 can be started to drive the scraper 51 to move, thereby adjusting the thickness of the solution adhered to the coating roller 5, and then adjusting the thickness of the solution adhered to the PET film 11, so that the device can be suitable for the process of different coatings adhering to the PET film 11.

[0055] Reference Figure 2 and Figure 4 The driving assembly 9 includes a driving motor 91 fixedly connected to the coating box 8 near the receiving roller 4. The output shaft of the driving motor 91 is fixedly connected to a driving sprocket 92. Both sides of the driving sprocket 92 are provided with connecting sprockets 93 arranged in parallel with the driving sprocket 92. The driving sprocket 92 and the two connecting sprockets 93 are sleeved with the same connecting chain 931. Each connecting sprocket 93 is rotatably connected to the side wall of the coating box 8, and each connecting sprocket 93 is coaxially driven and connected to a driving gear 94. One side of each driving gear 94 is meshed with a connecting gear 95, and the size of each driving gear 94 is smaller than the size of the connecting gear 95 meshed on one side. A driving screw 96 is fixedly connected to the middle position of each connecting gear 95 facing the feeding roller 2.

[0056] The scraper 51 is fixedly connected to connecting blocks 511 on both opposite sides. A scraper moving opening 83 is opened on one side of the coating box 8 close to each connecting block 511 for the connecting block 511 to pass through the coating box 8 and move along the side close to the feed roller 2 to the side close to the receiving roller 4. Each connecting block 511 is inserted into the adjacent scraper moving opening 83 and slides against the inner wall of the scraper moving opening 83.

[0057] Each driving screw 96 passes through an adjacent connecting block 511 and is threadedly connected to the connecting block 511 .

[0058] When the position of the scraper 51 needs to be adjusted, the drive motor 91 is started, and the drive motor 91 drives the drive sprocket 92 to rotate. The drive sprocket 92 drives the connecting chain 931 to rotate during the rotation process. The connecting chain 931 drives the two connected connecting sprockets 93 to rotate during the rotation process. Each connecting sprocket 93 drives the connected drive gear 94 to rotate during the rotation process. Each drive gear 94 drives the connected connecting gear 95 to rotate during the rotation process. Each connecting gear 95 drives the connected drive screw 96 to rotate during the rotation process. Each drive screw 96 drives the connected connecting block 511 to move during the rotation process. The two connecting blocks 511 drive the scraper 51 to move during the movement process. By controlling the direction of the drive motor 91, the scraper 51 can be driven to move toward or away from the coating roller 5.

[0059] One end of each driving screw 96 away from the connected connecting gear 95 is fixedly connected to a driving bevel gear 97, the upper side of each driving bevel gear 97 is meshed with a driven bevel gear 98, and the middle position of the upper side of each driven bevel gear 98 is fixedly connected to an active screw 99.

[0060] Each end of the two guide rollers 3 is arranged to penetrate the adjacent side wall of the coating box 8, and a guide slide 84 is provided on one side of the side wall of the coating box 8 close to each end of the two guide rollers 3 for the end of the guide roller 3 to pass through the coating box 8 and move in the vertical direction. The end of each guide roller 3 is inserted into the adjacent guide slide 84 and slides against the inner wall of the inserted guide slide 84. The ends of the two guide rollers 3 on the same side of the coating box 8 are rotatably connected to the same connecting plate 31.

[0061] Each active lead screw 99 passes through the middle position of the connecting plate 31 located on the same side of the coating box 8 and is threadedly connected to the connecting plate 31 .

[0062] In the process of adjusting the movement of the scraper 51, each driving screw 96 can drive the connected driving bevel gear 97 to rotate, each driving bevel gear 97 can drive the engaged driven bevel gear 98 to rotate, each driven bevel gear 98 can drive the connected active screw 99 to rotate, and each active screw 99 drives the connected connecting plate 31 to move during the rotation. In the process of simultaneous movement of the two connecting plates 31, the two guide rollers 3 can be driven to move with the two connecting plates 31 while maintaining the horizontality.

[0063] Thereby, the positions of the guide roller 3 and the coating roller 5 can be adjusted according to the distance between the scraper 51 and the coating roller 5, so that when a thicker coating needs to be applied on the PET film 11, there can be a larger gap when the PET film 11 moves between the two guide rollers 3 and the coating roller 5, so that the PET film 11 can adhere to the solution on the coating roller 5, thereby being able to adhere a thicker solution to the PET film.

[0064] Reference Figure 3 A liquid pushing plate 61 is also provided inside the liquid holding pool 6, and each side wall of the liquid pushing plate 61 abuts against the adjacent side wall of the liquid holding pool 6, so that the solution inside the liquid holding pool 6 can be arranged on the upper side of the liquid pushing plate 61. The liquid pushing plate 61 is arranged to be gradually inclined upwards on both sides of the liquid pushing plate 61 along the projection of the center line of the upper coating roller 5. A plurality of pressure springs 62 are fixedly connected to the bottom of the liquid pushing plate 61, and each pressure spring 62 is fixedly connected to the inner bottom wall of the liquid holding pool 6 on one side away from the liquid pushing plate 61.

[0065] Due to the existence of the liquid pushing plate 61, when the solution inside the liquid holding pool 6 decreases, the pressure spring 62 can drive the liquid pushing plate 61 to move upward. During the upward movement, the liquid pushing plate 61 can also drive the solution on the upper side of the liquid pushing plate 61 to move upward. Moreover, since the middle of the liquid pushing plate 61 is tilted downward, when there is a small amount of solution inside the liquid holding pool 6, the solution inside the liquid holding pool 6 can be concentrated at the position where the liquid pushing plate 61 is located directly below the coating roller 5, so that the coating roller 5 can contact the small amount of solution inside the liquid holding pool 6 to realize the coating process.

[0066] The side of the liquid storage tank 6 close to the feeding roller 2 is penetrated and connected with a liquid inlet pipe 63, and the side of the liquid inlet pipe 63 away from the liquid storage tank 6 penetrates the side wall of the coating box 8 and is connected with the solution outside the side wall of the coating box 8. An opening and closing door 64 is provided at one end of the liquid storage tank 6 located inside the coating box 8, and the opening and closing door 64 can block the opening of the liquid inlet pipe 63 located inside the liquid storage tank 6.

[0067] The upper side of the opening and closing door 64 is penetrated and fixedly connected with a rotating shaft 65 arranged parallel to the length direction of the opening and closing door 64, and each end of the rotating shaft 65 is arranged to penetrate the adjacent side walls of the liquid storage tank 6 and the coating box 8, and each end of the rotating shaft 65 is rotatably connected to the penetrated side walls of the coating box 8 and the liquid storage tank 6.

[0068] Reference Figure 2Each end of the rotating shaft 65 located outside the liquid storage tank 6 is fixedly connected to an opening and closing gear 66, and one side of each opening and closing gear 66 is meshed with a vertically arranged driving rack 67. A driving block 671 is fixedly connected to one side of the liquid pushing plate 61 close to each driving rack 67, and a pushing plate slide 85 is provided on the side wall of the liquid storage tank 6 and the coating box 8 close to each driving block 671 for the driving block 671 to pass through the liquid storage tank 6 and the coating box 8 and slide in the vertical direction, and one end of each driving block 671 passing through the pushing plate slide 85 is fixedly connected to the adjacent driving rack 67.

[0069] Reference Figure 3 A baffle 611 is fixedly connected to one side of each side wall of the liquid pushing plate 61 near the push plate sliding opening 85, and each baffle 611 is slidably connected to the inner wall of the adjacent liquid containing pool 6, and when the liquid pushing plate 61 is located at the bottom of the liquid containing pool 6, each baffle 611 can block the adjacent push plate sliding opening 85.

[0070] When the solution inside the liquid holding pool 6 decreases, under the action of multiple pressure springs 62, the liquid pushing plate 61 moves upward, and in the process of the liquid pushing plate 61 moving upward, it drives the two driving blocks 671 to move upward, and in the process of the two driving blocks 671 moving upward, it drives the two driving racks 67 to move upward, and in the process of the two driving racks 67 moving upward, it drives the two opening and closing gears 66 to rotate, and in the process of rotation, the two opening and closing gears 66 drive the connected rotating shaft 65 to rotate, and in the process of rotation of the rotating shaft 65, it drives the lower side of the opening and closing door 64 to rotate toward the side away from the adjacent inner wall of the liquid holding pool 6, thereby realizing the opening of the liquid inlet pipe 63, so that the external solution can enter the liquid holding pool 6.

[0071] When the liquid inlet pipe 63 continues to inject the solution into the liquid containing pool 6, under the action of the gravity of the solution, the liquid pushing plate 61 gradually moves downward, thereby driving the two driving racks 67 to move downward. In the process of the two driving racks 67 moving downward, the two opening and closing gears 66 are driven to rotate in the opposite direction. The two opening and closing gears 66 drive the rotating shaft 65 to rotate in the opposite direction. The rotating shaft 65 drives the side of the opening and closing door 64 away from the rotating shaft 65 to rotate in the direction close to the side wall of the adjacent liquid containing pool 6, so that when the liquid pushing plate 61 moves to the bottom of the liquid containing pool 6, the opening of the liquid inlet pipe 63 located inside the liquid containing pool 6 can be blocked.

[0072] The implementation principle of the embodiment of the present application is: when it is necessary to adhere a coating to the PET film 11, start the drive motor 91, and adjust the distance between the scraper 51 and the coating roller 5 and the distance between the two guide rollers 3 and the coating roller 5 according to the thickness of the coating required to be adhered to the PET film 11.

[0073] Then, the PET film 11 is fed through the feeding roller 2 so that it can pass through the position between the two guide rollers 3 and the coating roller 5 and enter the heating box 7 for heating after being adhered with the solution. The heated PET film 11 is collected by the receiving roller 4.

[0074] During the coating process, as the solution inside the liquid holding pool 6 decreases, the liquid pushing plate 61 gradually moves upward. During the upward movement of the liquid pushing plate 61, the opening and closing door 64 gradually opens, so that the required solution can be constantly replenished into the liquid holding chamber through the liquid inlet pipe 63 connected to the external solution.

[0075] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A light-shielding film production device, characterized in that: The invention comprises a feeding roller (2) and a receiving roller (4), wherein two guide rollers (3) arranged at intervals and having adjustable temperatures are arranged between the feeding roller (2) and the receiving roller (4), a constant temperature coating roller (5) is arranged at the lower side of the middle position of the two guide rollers (3), the coating roller (5) and the two guide rollers (3) are staggered and interlocked, a liquid storage tank (6) is arranged at the lower side of the coating roller (5), the lower side of the coating roller (5) can abut against the solution in the liquid storage tank (6), and the coating roller (5) is away from the feeding roller. A scraper (51) is provided on one side of the roller (2); a heating box (7) is provided between the guide roller (3) close to the receiving roller (4) and the receiving roller (4); a coating box (8) is provided on the outer side covers of the two guide rollers (3) and the coating roller (5) and the liquid containing pool (6); the coating box (8) is connected to a driving component (9) capable of driving the scraper (51) to move toward or away from the coating roller (5); the driving component (9) includes a driving motor (91); The output shaft of the driving motor (91) is drivingly connected to a driving gear (94), one side of the driving gear (94) is meshed with a connecting gear (95), one side of the connecting gear (95) is fixedly connected to a driving lead screw (96), the driving lead screw (96) is connected to the scraper (51) and can drive the scraper (51) to move along the length direction of the driving lead screw (96), the driving component (9) is connected to the two guide rollers (3), and the driving component (9) drives the guide rollers (3) to move along the length direction of the driving lead screw (96). During the movement of the scraper (51), the two guide rollers (3) can be driven to move up and down at the same time; one end of the driving screw (96) away from the connecting gear (95) is fixedly connected to a driving bevel gear (97); the driving bevel gear (97) is meshed with a driven bevel gear (98); the driven bevel gear (98) is fixedly sleeved with an active screw (99); the active screw (99) is connected to the two guide rollers (3) at the same time and can drive the two guide rollers (3) to move at the same time.

2. The light-shielding film production device according to claim 1, characterized in that: A liquid pushing plate (61) is provided inside the liquid containing pool (6), and a plurality of pressure springs (62) are connected between the bottom of the liquid pushing plate (61) and the inner bottom wall of the liquid containing pool (6). The liquid pushing plate (61) is arranged in a V shape and is open upward, and the liquid pushing plate (61) can isolate the solution inside the liquid containing pool (6) on the upper side of the liquid pushing plate (61).

3. The light-shielding film production device according to claim 2, characterized in that: The portion of the side wall of the liquid containing pool (6) located on the upper side of the liquid pushing plate (61) is connected to a liquid inlet pipe (63); the side of the liquid inlet pipe (63) located inside the liquid containing pool (6) is provided with an opening and closing door (64) capable of blocking the pipe opening of the liquid inlet pipe (63); the opening and closing door (64) is connected to the liquid pushing plate (61) and can open and close the pipe opening of the liquid inlet pipe (63) under the drive of the liquid pushing plate (61).

4. The light-shielding film production device according to claim 3, characterized in that: A driving rack (67) is fixedly connected to one side of the liquid pushing plate (61), an opening and closing gear (66) is meshed with one side of the driving rack (67), the opening and closing gear (66) is fixedly connected to the opening and closing door (64), and the opening and closing door (64) can rotate under the drive of the opening and closing gear (66).

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