Uniform coating apparatus for quantum dot diffusion film

Abstract

The utility model discloses a kind of uniform coating equipment of quantum dot diffusion film applied to coating equipment field, by setting glue scraping plate to remove the glue material overflow to the surface of first laminating roller and second laminating roller, reduce the probability that glue material remaining on first laminating roller and second laminating roller continue to contact laminating membrane outer surface, simultaneously using the glue material that setting is scraped to remove and adhere to the outer surface of laminating membrane, improve the finished product quality of laminating membrane;By being provided with glue storage groove in the axial both ends of first laminating roller and second laminating roller, glue storage groove can store certain amount of glue material, overflowed glue material during laminating process will most directly enter into glue storage groove temporary storage, to reduce the diffusion area of glue material on laminating roller and laminating membrane surface;Meanwhile, glue storage groove is located in the axial both ends of first laminating roller and second laminating roller, will not interfere with the normal rotation of laminating roller and the laminating process of base material and cover film.

Description

Technical Field

[0001] This utility model relates to the field of coating equipment, and in particular to a uniform coating equipment for quantum dot diffusion films. Background Technology

[0002] Quantum dots are a type of nanomaterial, a semiconductor material synthesized from elements such as zinc, cadmium, selenium, and sulfur. These nanoparticles, with a diameter of 2–10 nm, are characterized by high luminous efficiency, long lifespan, and good color purity. Quantum dots are generally spherical, and the optical and electronic properties of quantum dots vary depending on their shape and size. By changing the size and chemical composition of quantum dot materials, their fluorescence emission wavelength can be made to cover the entire visible light region. Quantum dot films are generally made by coating quantum dots onto the surface of a substrate and then performing composite processing.

[0003] A search revealed, for example, a multi-stage coating device for quantum dot films disclosed in patent publication number 14N219171450U. This device includes a machine body and a coating mechanism. The machine body houses the coating mechanism for quantum dot coating, which includes a feed roller, coating head, pressure roller, limiting plate, composite roller, and guide roller. Feed rollers for guiding and conveying the film material are installed at both ends inside the machine body. A coating head is installed on one side of the top of the machine body and connected to an external feeding device. A pressure roller for extruding quantum dot material is installed at the top of the machine body. The rotating pressure roller extrudes and flattens the quantum dot material on the substrate surface. The multi-stage coating process ensures the uniformity of the material. Simultaneously, the limiting plate restricts the coating range. After coating, the substrate and film are bonded together under the pressure of the composite roller. Under pressure, the internal quantum dot material further diffuses, ensuring a tight bond between the substrate and the film while preventing material spillage and contamination of the film's edges.

[0004] Based on the above search and combined with the existing technology, it was found that the coating equipment disclosed above is difficult to completely eliminate the overflow of adhesive during the lamination process in actual use. Moreover, it is difficult to effectively clean up the overflowed adhesive in the existing technology. The overflowed adhesive is easy to adhere to the surface of the laminated film, affecting the quality of the laminated film. Summary of the Invention

[0005] The core of this invention lies in solving the problem of difficult-to-clean adhesive overflow in existing technologies by using a scraper and a scraper sleeve. It also reduces the amount of residual adhesive on the outer surface of the laminate.

[0006] To solve the above problems, the present invention adopts the following technical solution.

[0007] A uniform coating device for quantum dot diffusion film includes a frame, a coating head and a glue storage tank are installed on the top of the frame near the substrate input side, and a lamination mechanism is provided in the middle of the frame. The lamination mechanism includes a first lamination roller and a second lamination roller arranged horizontally side by side. Both the first lamination roller and the second lamination roller are rotatably mounted on the inner side of the frame. The film and the substrate coated by the coating head pass around the second laminating roller and the first laminating roller respectively, and are laminated by the second laminating roller and the first laminating roller to obtain the laminated film; Both ends of the first and second laminating rollers are provided with a glue-removing structure, which includes a collection box and a scraper. A support frame for the collection box is fixed on the inner side of the frame. The scraper is fixed at the top opening of the collection box, and the bottom surfaces of the first and second laminating rollers slide against the scraper.

[0008] By setting a scraper to remove the adhesive that overflows onto the surfaces of the first and second laminating rollers, the probability of residual adhesive on the first and second laminating rollers continuing to contact the outer surface of the laminated film is reduced.

[0009] Furthermore, a scraper sleeve is provided between the first laminating roller and the second laminating roller. The scraper sleeve is sleeved on the outside of the laminating film and slides against the surface of the laminating film. The end of the scraper sleeve is fixedly connected to any one of the collection boxes by a guide groove shell.

[0010] Furthermore, the scraper sleeve is an arc-shaped sleeve, and the middle part of the scraper sleeve is arched upwards.

[0011] Furthermore, both the scraper sleeve and the scraper blade have built-in electric heating wires.

[0012] Furthermore, anti-overflow plates are integrally provided on both vertical ends of the scraper, and the first and second laminating rollers are slidably attached to the anti-overflow plates.

[0013] Furthermore, anti-overflow arc plates are integrally installed on both ends of the scraper sleeve along the arc length.

[0014] Furthermore, both ends of the first and second laminating rollers are provided with glue storage tanks, and the substrate and the film are located between the two glue storage tanks.

[0015] Furthermore, the upper end of the scraper is integrally provided with a protrusion that slides in conjunction with the glue storage tank.

[0016] Compared with existing technologies, the advantages of this utility model are: (1) This solution reduces the probability that the adhesive residue on the first and second laminating rollers will continue to contact the outer surface of the laminated film by setting a scraper to scrape off the adhesive that overflows onto the surface of the first laminating roller and the second laminating roller. At the same time, the scraper sleeve is used to scrape off the adhesive that adheres to the outer surface of the laminated film, thereby improving the finished quality of the laminated film.

[0017] (2) This solution provides glue storage tanks at both ends of the first and second laminating rollers. The glue storage tanks can store a certain amount of glue. Most of the glue overflowing during the lamination process will directly enter the glue storage tanks for temporary storage, thereby reducing the diffusion area of ​​the glue on the laminating rollers and the laminating film surface. At the same time, the glue storage tanks are located at both ends of the first and second laminating rollers, so they will not interfere with the normal rotation of the laminating rollers or the lamination process of the substrate and the film. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the front cross-sectional structure of this utility model; Figure 3 This is a schematic diagram of the structure of the lamination mechanism of this utility model; Figure 4 This is a schematic diagram of the adhesive removal structure of this utility model; Figure 5 This is a schematic diagram of the composite roller of this utility model.

[0019] Explanation of the labels in the diagram: 1. Frame; 2. Coating head; 3. Glue storage tank; 4. First laminating roller; 5. Second laminating roller; 6. Collection box; 7. Glue scraper; 701. Anti-overflow plate; 702. Protrusion; 8. Support frame; 9. Glue scraper sleeve; 901. Anti-overflow arc plate; 10. Glue guide groove shell; 11. Glue storage tank; 12. Substrate; 13. Lamination; 14. Lamination film. Detailed Implementation

[0020] The technical solution will now be clearly and completely described with reference to the accompanying drawings in the embodiments of this utility model.

[0021] First implementation method: Please see Figures 1-4 A uniform coating device for quantum dot diffusion film includes a frame 1. A coating head 2 and a glue storage tank 3 are installed on the top of the frame 1 near the input side of the substrate 12. A lamination mechanism is provided in the middle of the frame 1. The lamination mechanism includes a first lamination roller 4 and a second lamination roller 5 arranged horizontally side by side. The first lamination roller 4 and the second lamination roller 5 are both rotatably mounted on the inner side of the frame 1.

[0022] In this process, the film 13 and the substrate 12 coated by the coating head 2 pass over the second laminating roller 5 and the first laminating roller 4 respectively, and are laminated by the second laminating roller 5 and the first laminating roller 4 to obtain the laminated film 14. Of course, a drive for the first laminating roller 4 and the second laminating roller 5 is installed at the rear of the frame 1 in the following manner. Figure 2 Rotate in the direction indicated by the bold dashed arrow.

[0023] It should be noted that the substrate 12, the adhesive applied to one side of the substrate 12, and the film 13 are all conventional materials composed of quantum dot diffusion films in the prior art. For example, the substrate 12 is an optical grade PET film; the adhesive is mainly composed of quantum dot materials (such as 14dSe / ZnS core-shell structure, InP / ZnS cadmium-free system) and barrier resins (such as polyvinyl alcohol or polyurethane); the film 13 is a water and oxygen barrier film, which will not be described in detail here.

[0024] Both ends of the first laminating roller 4 and the second laminating roller 5 are provided with a glue-removing structure. Specifically, the glue-removing structure includes a collection box 6 and a scraper 7. A support frame 8 for the collection box 6 is fixed on the inner side of the frame 1. The scraper 7 is fixed at the top opening of the collection box 6, and the bottom surfaces of the first laminating roller 4 and the second laminating roller 5 are slidably attached to the scraper 7.

[0025] By setting up a scraper 7 to scrape off the adhesive material that overflows onto the surfaces of the first laminating roller 4 and the second laminating roller 5, the probability of the adhesive material remaining on the first laminating roller 4 and the second laminating roller 5 continuing to contact the outer surface of the laminated film is reduced.

[0026] In addition, a scraper sleeve 9 is provided between the first laminating roller 4 and the second laminating roller 5. The scraper sleeve 9 is sleeved on the outside of the laminating film 14 and slides against the surface of the laminating film 14. The end of the scraper sleeve 9 is fixedly connected to any one of the collection boxes 6 by a guide groove shell 10. Furthermore, the scraper sleeve 9 is an arc-shaped sleeve, and the middle part of the scraper sleeve 9 is arched upward. The arc-shaped scraper sleeve 9 can better fit the surface of the laminating film 14, improve the scraping effect, and at the same time, it is not easy to scratch the surface of the laminating film 14.

[0027] Both the scraper sleeve 9 and the scraper plate 7 have built-in electric heating wires (not shown in the figure). The electric heating wires can be of a conventional type, such as the 114r1312l4 electric heating wire. During the operation of the equipment, the scraper sleeve 9 and the scraper plate 7 with built-in electric heating wires can heat the residual adhesive material to prevent the adhesive material from cooling and solidifying, and facilitate the cleaning and collection of the adhesive material.

[0028] Among them, anti-overflow plates 701 are integrated on both vertical ends of the scraper blade 7, and the first laminating roller 4 and the second laminating roller 5 are slidably attached to the anti-overflow plates 701. Anti-overflow arc plates 901 are integrated on both ends of the scraper sleeve 9 along the arc length. The setting of anti-overflow plates 701 and anti-overflow arc plates 901 can effectively prevent the glue from overflowing to other parts of the equipment, ensuring the stability of equipment operation and the quality of the laminating film 14.

[0029] Second implementation method: Based on the first implementation method, such as Figure 5 As shown, both ends of the first laminating roller 4 and the second laminating roller 5 are provided with glue storage tanks 11. The substrate 12 and the film 13 are located between the two glue storage tanks 11. The glue storage tanks 11 can store a certain amount of glue. Most of the glue that overflows during the lamination process will directly enter the glue storage tanks 11 for temporary storage, thereby reducing the diffusion area of ​​the glue on the laminating roller and the laminating film 14. At the same time, the glue storage tanks 11 are located at both ends of the first laminating roller 4 and the second laminating roller 5, so they will not interfere with the normal rotation of the laminating roller and the lamination process of the substrate 12 and the film 13.

[0030] The upper end of the scraper 7 is integrally provided with a protrusion 702 that slides with the glue storage tank 11. Through the sliding cooperation between the protrusion 702 and the glue storage tank 11, the glue material in the glue storage tank 11 can be accurately scraped off, further reducing the impact of glue residue on the quality of the laminated film 14.

[0031] It should be noted that the specific models and specifications of the electrical equipment involved in this solution need to be selected and determined based on the actual specifications of the device. The specific selection and calculation methods adopt existing technologies in this field, so they will not be described in detail here. The power supply and principles of the electrical equipment involved are clear to those skilled in the art, and will not be described in detail here.

[0032] The above description is merely a preferred embodiment of this utility model; it encompasses all the protection scope of this utility model. Any equivalent substitutions or modifications made by those skilled in the art within the technical scope disclosed in this utility model, based on the technical solution and its improved concept, should be covered within the protection scope of this utility model.

Claims

1. A uniform coating apparatus for a quantum dot diffusion film, comprising a frame (1), wherein a coating head (2) and a glue storage tank (3) are mounted on the top of the frame (1) near the input side of a substrate (12), and a lamination mechanism is provided in the middle of the frame (1), characterized in that: The laminating mechanism includes a first laminating roller (4) and a second laminating roller (5) arranged horizontally side by side. The first laminating roller (4) and the second laminating roller (5) are both rotatably mounted on the inner side of the frame (1). The film (13) and the substrate (12) coated by the coating head (2) pass over the second laminating roller (5) and the first laminating roller (4) respectively, and are laminated by the second laminating roller (5) and the first laminating roller (4) to obtain the laminated film (14). The first laminating roller (4) and the second laminating roller (5) are provided with a glue-removing structure at both ends of the axial direction. The glue-removing structure includes a collection box (6) and a scraper (7). The inner side of the frame (1) is fixed with a support frame (8) for the collection box (6) to be fixedly installed. The scraper (7) is fixed at the top opening of the collection box (6), and the bottom surfaces of the first laminating roller (4) and the second laminating roller (5) are slidably attached to the scraper (7).

2. The uniform coating equipment for a quantum dot diffusion film according to claim 1, characterized in that: A scraper sleeve (9) is provided between the first laminating roller (4) and the second laminating roller (5). The scraper sleeve (9) is sleeved on the outside of the laminating film (14) and slides against the surface of the laminating film (14). The end of the scraper sleeve (9) is fixedly connected to any one of the collection boxes (6) by a guide groove shell (10).

3. The uniform coating equipment for a quantum dot diffusion film according to claim 2, characterized in that: The scraper sleeve (9) is an arc-shaped sleeve, and the middle part of the scraper sleeve (9) is arched upward.

4. The uniform coating equipment for a quantum dot diffusion film according to claim 3, characterized in that: Both the scraper sleeve (9) and the scraper plate (7) are equipped with built-in electric heating wires.

5. The uniform coating equipment for a quantum dot diffusion film according to claim 1, characterized in that: The vertical two sides of the scraper (7) are integrally provided with anti-overflow plates (701), and the first laminating roller (4) and the second laminating roller (5) are slidably attached to the anti-overflow plates (701).

6. The uniform coating equipment for a quantum dot diffusion film according to claim 2, characterized in that: The scraper sleeve (9) is integrally provided with anti-overflow arc plate (901) on both sides along the arc length.

7. The uniform coating equipment for a quantum dot diffusion film according to claim 1, characterized in that: Both ends of the first laminating roller (4) and the second laminating roller (5) are provided with glue storage tanks (11), and the substrate (12) and the film (13) are located between the two glue storage tanks (11).

8. The uniform coating equipment for a quantum dot diffusion film according to claim 7, characterized in that: The upper end of the scraper (7) is integrally provided with a protrusion (702) that slides with the glue storage tank (11).

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