Micro-concave optical film coating device

Abstract

The utility model relates to the technical field of optical film coating, in particular to a micro-concave optical film coating device which comprises a supporting structure, two groups of adjusting rollers are rotatably connected in the supporting structure, the outer side surfaces of the adjusting rollers are movably connected with film materials, micro-concave rollers are rotatably connected in the supporting structure and located on the lower sides of the two groups of adjusting rollers, and the film materials are movably connected with the micro-concave rollers. A glue storage groove is formed in the position, located on the lower side of the micro-concave roller, in the supporting structure, a metering roller is arranged on the position, located on the lower side of the membrane material, in the supporting structure, and adjusting assemblies are arranged on the two sides of the metering roller. According to the utility model, the metering roller is arranged at the downstream of the micro-concave roller, so that the thickness of the coating liquid on the membrane material is kept within a set range.

Description

Technical Field

[0001] The utility model relates to the technical field of optical film coating, in particular to a micro-concave optical film coating device. Background Art

[0002] On the surface of portable display devices, such as mobile phones or tablet computers, a layer of optical functional film is usually attached. This layer of optical functional film is mainly obtained by coating a coating liquid containing optical functions on different optical film materials to obtain an optical film that meets the specified requirements, such as hard coating, anti-glare film, anti-blue light film and anti-reflection film. Due to the low viscosity of the coating liquid, the thin coating thickness and high surface requirements, it is usually coated with a micro-dimpled, slit and other coating devices.

[0003] The micro-concave coating device is a low-viscosity, thin-layer coating device that is currently widely used. The micro-concave roller in the traditional micro-concave coating equipment is partially immersed in the material tank, and is equipped with an independent motor to carry the coating liquid in the material tank by rotating the micro-concave roller. The excess coating liquid is scraped off by a scraper and transferred to the optical film material by reverse kiss coating. This device is simple to operate and easy for operators to use. However, the traditional micro-concave coating equipment uses a scraper to scrape off the excess coating liquid. As the scraper is used, it will gradually wear out, affecting the uniformity of the coating thickness. At the same time, the appearance of the coating will gradually deteriorate. A new scraper must be replaced after a period of time, resulting in a decrease in the overall production efficiency of the optical film. For this reason, we propose a micro-concave optical film coating device to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to provide a micro-concave optical film coating device to solve the problem proposed in the above background technology that the scraper will gradually wear out, affecting the uniformity of the coating thickness, and the appearance of the coating will gradually deteriorate, and a new scraper must be replaced after a period of time, resulting in a decrease in the overall production efficiency of the optical film.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a micro-concave optical film coating device, comprising a supporting structure, two groups of adjusting rollers are rotatably connected in the supporting structure, the outer surfaces of the adjusting rollers are movably connected with film materials, micro-concave rollers are rotatably connected at the lower side of the two groups of adjusting rollers in the supporting structure, a glue storage tank is provided at the lower side of the micro-concave roller in the supporting structure, a metering roller is provided at the lower side of the film material in the supporting structure, adjustment components are provided on both sides of the metering roller, and an independent motor is provided.

[0006] Preferably, a protrusion is integrally formed on the surface of the metering roller, and the protrusion is annular. The bottom of the metering roller is located in the glue storage tank and is fixedly connected to a support seat.

[0007] Preferably, the surface of the metering roller is provided with recesses between the protrusions, the recesses are arc-shaped, and the protrusions and recesses are combined into an S-shape.

[0008] Preferably, the adjustment component includes a connecting plate, a slide rail, a support frame, a connecting block and a bidirectional screw. Connecting plates are provided on both sides of the adjustment roller. Slide rails are provided in the connecting plates. One side of the surface of the connecting plate is fixedly connected to the support frame. A bidirectional screw is rotatably connected in the support frame. Two groups of connecting blocks are movably connected to the surface of the bidirectional screw. The connecting blocks are connected to the adjustment roller.

[0009] Preferably, the diameter of the metering roller is 6-30 mm, the spacing of the protrusions is 100-600 μm, and the capacity of the recesses is 50-150 cm 3 / m 2 , the depth is 5-150μm, the metering roller rotates in the same direction as the film moving direction, the micro-concave roller rotates in the opposite direction to the film, and the metering roller speed ratio of the metering roller (metering roller speed / coating speed) is 0.1-0.5.

[0010] Preferably, four groups of first cylinders are symmetrically arranged on the left and right sides of the glue storage tank, the upper ends of the first cylinders are fixedly connected with first connecting members, and the inner sides of the first connecting members are fixedly connected to the outer wall of the glue storage tank.

[0011] Preferably, the four bottom corners of the connecting plate are fixedly connected with second connecting pieces, the lower end of the second connecting piece is connected to the end of the second cylinder, and the second cylinder is fixedly installed in the supporting structure.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. The utility model sets a metering roller to solve the technical problems of coating thickness variation and surface deterioration caused by scraper wear during micro-concave coating. Accordingly, a scraper is not used. After the coating liquid on the micro-concave roller is transferred to the film material, a metering roller is set downstream of the micro-concave roller. The concave-convex design of the metering roller surface is used to remove excess coating liquid on the film material surface, so that the coating liquid thickness on the film material surface remains uniform.

[0014] 2. The utility model adjusts the distance between the metering roller and the optical film by means of the adjustment component, thereby adjusting the thickness of the coating liquid, thereby improving the applicability of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 It is a schematic diagram of the structure of the utility model;

[0017] Figure 2 It is a schematic side cross-sectional view of the structure of the utility model;

[0018] Figure 3 It is a schematic diagram of the structural section of the metering roller of the utility model;

[0019] Figure 4 It is a structural schematic diagram of the adjustment component of the utility model;

[0020] Figure 5 For this utility model Figure 3 A is a partial enlarged schematic diagram of the middle part.

[0021] In the figure: 1. Support structure; 2. Adjusting roller; 3. Film material; 4. Micro-concave roller; 5. Glue storage tank; 6. Measuring roller; 7. Protrusion; 8. Concave hole; 9. Adjusting assembly; 901. Connecting plate; 902. Slide rail; 903. Support frame; 904. Connecting block; 905. Bidirectional screw; 10. Support seat; 11. First cylinder; 12. First connecting piece; 13. Second cylinder; 14. Second connecting piece. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-5 The utility model provides an embodiment: a micro-concave optical film coating device, comprising a support structure 1, two groups of adjustment rollers 2 are rotatably connected in the support structure 1, and the outer surface of the adjustment roller 2 is movably connected with a film material 3, a micro-concave roller 4 is rotatably connected to the lower side of the two groups of adjustment rollers 2 in the support structure 1, a glue storage tank 5 is arranged at the lower side of the micro-concave roller 4 in the support structure 1, a metering roller 6 is arranged at the lower side of the film material 3 in the support structure 1, and adjustment components 9 are arranged on both sides of the metering roller 6, and an independent motor is arranged;

[0024] The device solves the problem that the scraper will gradually wear out, affecting the uniformity of the coating thickness, and the coating film appearance will gradually deteriorate, and a new scraper must be replaced after a period of time, resulting in a decrease in the overall production efficiency of the optical film, by setting a metering roller 6.

[0025] Furthermore, a protrusion 7 is integrally formed on the surface of the metering roller 6, and the cross section of the protrusion 7 is annular. The bottom of the metering roller 6 is located in the glue storage tank 5 and is fixedly connected to a support seat 10. A channel is left in the support seat 10 to facilitate the flow of liquid, and the support seat 10 is made of Teflon. Figure 2 As shown, the structure is used to evenly scrape off the excess glue on the bottom of the membrane material 3 through the protrusion 7, which solves the problem that the traditional metering rod uses a steel wire wound on a steel roller, and the steel roller is prone to wear and breakage due to long-term use. The technical solution adopts an integrally formed metering roller 6 to avoid the above-mentioned problem. At the same time, the arc-shaped setting avoids scratching the membrane material 3.

[0026] Furthermore, the surface of the metering roller 6 is provided with recesses 8 between the protrusions 7, the recesses 8 are arc-shaped, and the protrusions 7 and the recesses 8 are combined and wound on the surface of the metering roller 6. Figure 5 As shown, the structure is used to form a desired coating thickness after the coating liquid is leveled by setting the protrusions 7 and recesses 8 on the surface of the metering roller 6.

[0027] Furthermore, the adjustment assembly 9 includes a connecting plate 901, a slide rail 902, a support frame 903, a connecting block 904 and a bidirectional screw 905. The connecting plates 901 are arranged on both sides of the adjustment roller 2. The connecting plates 901 are provided with slide rails 902. One side of the surface of the connecting plate 901 is fixedly connected to the support frame 903. The support frame 903 is rotatably connected to the bidirectional screw 905. The surface of the bidirectional screw 905 is movably connected to two groups of connecting blocks 904. The connecting blocks 904 are connected to the adjustment roller 2. Figure 4 As shown, the structure is used to rotate the bidirectional screw 905 to drive the two connecting blocks 904 to drive the adjusting roller 2 to move laterally, so that the connecting block 904 can be adjusted to move laterally in the slide rail 902, and the length can be adjusted according to the requirements of different film materials 3 sizes to make it suitable for the requirements of different film materials 3.

[0028] Furthermore, the diameter of the metering roller 6 is 6-30 mm, the spacing of the protrusions 7 is 100-600 μm, and the capacity of the recesses 8 is 50-150 cm 3 / m 2 , in this embodiment, specifically 100cm 3 / m 2The depth is 5-150 μm, and in this embodiment, it is specifically 50 μm. The metering roller 6 rotates in the same direction as the film 3, and the micro-concave roller 4 rotates in the opposite direction to the film 3. The metering roller speed ratio (metering roller speed / coating speed) of the metering roller 6 is 0.1-0.5. Figure 2 As shown, the structure is used to adapt the metering roller 6 to the film material 3 through the accuracy of the metering roller 6, and to be used synchronously with the micro-concave roller 4.

[0029] Furthermore, four groups of first cylinders 11 are symmetrically arranged on the left and right sides of the glue storage tank 5, and the upper ends of the first cylinders 11 are fixedly connected with first connecting members 12, and the inner sides of the first connecting members 12 are fixedly connected with the outer wall of the glue storage tank 5. Figure 4 As shown, the structure is used to drive the glue storage tank 5 to move up and down through the first cylinder 11 through the first connecting member 12. When cleaning or replacing the micro-concave roller 4, the glue storage tank 5 descends. When coating is required, the glue storage tank 5 rises to a fixed position through the first cylinder 11.

[0030] Furthermore, the four corners of the bottom of the connecting plate 901 are fixedly connected with second connecting members 14, the lower end of the second connecting member 14 is connected to the end of the second cylinder 13, and the second cylinder 13 is fixedly installed in the supporting structure 1. Figure 3 As shown, the structure is used to start the second cylinder 13 to drive the second connecting member 14 to move the connecting plate 901 up and down, adjust the distance between the metering roller 6 and the film material 3, so that it can scrape off the corresponding thickness according to the glue coating required by different film materials 3, save resources, and facilitate the replacement of the micro-concave roller 4.

[0031] Working principle: When used, Figure 1 As shown, the film material 3 is guided by the adjusting roller 2, and the coating liquid in the glue storage tank 5 is attached to the surface of the micro-concave roller 4 through the rotation of the micro-concave roller 4. After rotation, the coating liquid is applied to the bottom of the film material 3, and the film material 3 moves the metering roller 6 to rotate. Figure 2 and Figure 3 As shown, when the metering roller 6 rotates, the protrusions 7 are used to evenly scrape off the excess glue at the bottom of the film material 3. At the same time, the arc-shaped setting avoids scratching the film material 3. The protrusions 7 and the recesses 8 on the surface are used in combination to guide the scraped excess coating liquid so that it flows back into the glue storage tank 5 through the recesses 8. Figure 4As shown, the bidirectional screw 905 is rotated to make the two connecting blocks 904 drive the adjusting roller 2 to move laterally, so that the connecting block 904 can be adjusted to move laterally in the slide rail 902, and the length is adjusted according to the requirements of different film materials 3 sizes to make it suitable for the scraping requirements of different film materials 3. When the scraping thickness of the glue needs to be adjusted, the second cylinder 13 is started to drive the second connecting piece 14 to move the connecting plate 901 up and down, and the distance between the metering roller 6 and the film material 3 is adjusted so that it can scrape the corresponding thickness according to the glue required by different film materials 3. The above is the entire working principle of the utility model.

[0032] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A micro-dimpled optical film coating device, characterized in that: The invention comprises a support structure (1), wherein two groups of adjusting rollers (2) are rotatably connected in the support structure (1), and the surfaces of the adjusting rollers (2) are movably connected with film materials (3). A micro-concave roller (4) is rotatably connected at the lower side of the two groups of adjusting rollers (2) in the support structure (1), and a glue storage tank (5) is provided at the lower side of the micro-concave roller (4) in the support structure (1), and a metering roller (6) is provided at the lower side of the film material (3) in the support structure (1), and adjustment components (9) are provided on both sides of the metering roller (6), and an independent motor is provided.

2. The micro-concave optical film coating device according to claim 1, characterized in that: A protrusion (7) is integrally formed on the surface of the metering roller (6), and the protrusion (7) is annular. The bottom of the metering roller (6) is located in the glue storage tank (5) and is fixedly connected to a support seat (10).

3. The micro-concave optical film coating device according to claim 1, characterized in that: The surface of the metering roller (6) is provided with recesses (8) between the protrusions (7); the recesses (8) are arc-shaped; and the protrusions (7) and the recesses (8) are combined into an S shape.

4. The micro-concave optical film coating device according to claim 1, characterized in that: The adjustment component (9) comprises a connecting plate (901), a slide rail (902), a support frame (903), a connecting block (904) and a bidirectional screw (905); connecting plates (901) are arranged on both sides of the adjustment roller (2); a slide rail (902) is provided in the connecting plate (901); a support frame (903) is fixedly connected to one side of the surface of the connecting plate (901); a bidirectional screw (905) is rotatably connected to the support frame (903); two groups of connecting blocks (904) are movably connected to the surface of the bidirectional screw (905); and the connecting blocks (904) are connected to the adjustment roller (2).

5. The micro-concave optical film coating device according to claim 3, characterized in that: The diameter of the metering roller (6) is 6-30 mm, the spacing of the protrusions (7) is 100-600 μm, and the capacity of the recesses (8) is 50-150 cm 3 / m 2 , the depth is 5-150 μm, the metering roller (6) rotates in the same direction as the moving direction of the film material (3), the micro-concave roller (4) rotates in the opposite direction to the film material (3), and the metering roller speed ratio (metering roller speed / coating speed) of the metering roller (6) is 0.1-0.

5.

6. The micro-concave optical film coating device according to claim 4, characterized in that: Four groups of first cylinders (11) are symmetrically arranged on the left and right sides of the glue storage tank (5); the upper ends of the first cylinders (11) are fixedly connected to first connecting members (12); and the inner sides of the first connecting members (12) are fixedly connected to the outer wall of the glue storage tank (5).

7. The micro-concave optical film coating device according to claim 4, characterized in that: The four corners of the bottom of the connecting plate (901) are fixedly connected to second connecting members (14), the lower end of the second connecting member (14) is connected to the end of the second cylinder (13), and the second cylinder (13) is fixedly installed in the supporting structure (1).

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