Glass coating apparatus and coating method thereof

Abstract

The present application relates to a kind of glass coating device and its coating method, the glass coating device includes first gantry, second gantry, coating assembly, doctor blade coating assembly and coating platform, the coating assembly includes coating die head, coating die head is located in first gantry and the position of along up-down direction is adjustable, second gantry is located in first gantry and the position of along up-down direction is adjustable, doctor blade coating assembly includes doctor blade coating die head, doctor blade coating die head is connected with second gantry, second gantry can drive doctor blade coating die head and the position of along up-down direction is adjustable, coating platform is located in the lower end of coating die head and doctor blade coating die head, the upper end of coating platform is suitable for placing glass, the position of coating platform along front-back direction is adjustable, so that coating die head and doctor blade coating die head are coated and doctor blade coating to glass respectively.The coating effect of the glass coating device of the present application is better.

Description

Technical Field

[0001] This invention relates to the field of glass processing technology, and more specifically, to a glass coating apparatus and a coating method having the same. Background Technology

[0002] With the rapid development of high technology and the electronics industry, new foldable screen electronic products are constantly being launched on the market. Flexible cover glass, as a crucial component of foldable screen technology, has attracted significant attention. As a flexible cover glass for foldable products, it often requires excellent bending and optical properties. Therefore, most electronic products from major brands use materials such as polyimide (PI) and ultra-thin glass (UTG) for their flexible cover glass. While polyimide (PI) has good bending properties, it suffers from problems such as creases easily appearing during bending, surface scratches, and a short lifespan. This has driven the development of ultra-thin glass in the electronics industry. Thin glass generally refers to glass with a thickness of 0.1mm-0.33mm. This type of glass has good impact resistance but relatively poor bending performance. Ultra-thin glass (UTG) typically refers to glass with a thickness of less than 0.1mm. It has excellent flexibility, but also suffers from poor impact resistance and is prone to breakage.

[0003] In related technologies, glass coating devices are prone to scratching ultra-thin glass, and the smoothness of the coated adhesive surface is poor, resulting in uneven film thickness and poor coating effect. Summary of the Invention

[0004] The present invention aims to at least partially solve one of the technical problems in the related art.

[0005] Therefore, embodiments of the present invention provide a glass coating apparatus with better coating effect.

[0006] Embodiments of the present invention also provide a glass coating method.

[0007] According to an embodiment of the present invention, a glass coating apparatus includes: a first gantry; a coating assembly including a coating die head disposed on the first gantry and whose position is adjustable in the vertical direction; a second gantry disposed on the first gantry and whose position is adjustable in the vertical direction; a scraping assembly including a scraping die head connected to the second gantry, the second gantry being capable of driving the scraping die head to be position adjustable in the vertical direction; and a coating platform disposed at the lower ends of the coating die head and the scraping die head, the upper end of the coating platform being adapted to place glass, the position of the coating platform being adjustable in the front-back direction so that the coating die head and the scraping die head respectively coat and scrape the glass.

[0008] According to embodiments of the present invention, the glass coating apparatus can coat a liquid coating solution onto glass to form a wet film using a coating die, and then scrape the wet film onto the glass using a scraper die. This results in a more uniform film thickness on the glass, improving the coating effect of the glass coating apparatus. Furthermore, the glass coating apparatus of the present invention allows for adjustment of the vertical positions of the coating component and the scraper component, making the glass coating apparatus convenient to use, with a simple structural design and low cost.

[0009] In some embodiments, a substrate is provided at the upper end of the coating platform, the substrate having a constant thickness, and the glass is adapted to be placed on the upper end of the substrate.

[0010] In some embodiments, the lower end of the second gantry is provided with rollers, there are two rollers, and the two rollers are respectively arranged at the left and right ends of the second gantry. During the glass coating, the rollers abut against the substrate.

[0011] In some embodiments, a suction cup is provided between the coating platform and the substrate, and the suction cup is attached to the substrate to fix the substrate relative to the coating platform.

[0012] In some embodiments, the glass coating apparatus further includes an elastic element, the upper end of which is connected to the first gantry and the lower end of which is connected to the second gantry. The elastic element has an elastic force that causes the second gantry to move toward the first gantry.

[0013] In some embodiments, the elastic element is a spring, and there are two springs, which are arranged at intervals in the left-right direction on the second gantry.

[0014] In some embodiments, the coating assembly further includes a liquid supply system connected to the coating die head, the coating die head having a liquid outlet slit, the liquid supply system being used to supply liquid into the coating die head and coat it onto the glass through the liquid outlet slit.

[0015] In some embodiments, the coating assembly further includes a first driving component connected to the first gantry and the coating die head for adjusting the position of the coating die head along the vertical direction; and / or, the glass coating apparatus further includes a second driving component connected to the second gantry and the first gantry for adjusting the position of the second gantry along the vertical direction; and / or, the blade coating assembly further includes a third driving component connected to the second gantry and the blade coating die head for adjusting the position of the blade coating die head relative to the second gantry.

[0016] According to another embodiment of the present invention, a glass coating method is applied to the glass coating apparatus described in any one of the above embodiments, wherein the upper end surface of the glass has a grooved area and a non-grooved area, and the glass coating method includes the following steps:

[0017] The glass is attached to the substrate, and the substrate is placed on the coating platform;

[0018] The coating die head is moved up and down until a first gap is formed between the coating die head and the glass.

[0019] The coating die head is moved up and down until a second gap is formed between the coating die head and the glass.

[0020] A wet film is applied to the upper surface of the glass through the coating die;

[0021] The excess liquid on the upper surface of the glass is scraped off by the coating die head so that the liquid surface in the grooved area is flush with the liquid surface in the non-grooved area.

[0022] According to the glass coating method of the present invention, a coating solution is applied to the glass to form a wet film using a coating die, and then the wet film on the glass is scraped using a scraper die. This results in a more uniform film thickness on the glass and improves the coating effect of the glass coating apparatus. Furthermore, the glass coating apparatus of the present invention allows for adjustment of the vertical positions of the coating component and the scraper component, making the glass coating apparatus convenient to use, with a simple structural design and low cost.

[0023] In some embodiments, the distance between the bottom of the groove area and the lower end face of the glass is greater than or equal to 30 μm and less than or equal to 50 μm, the distance between the upper end face of the non-groove area and the lower end face of the glass is greater than or equal to 70 μm and less than or equal to 100 μm; the size of the first gap is greater than or equal to 0.1 mm and less than or equal to 0.3 mm, and the size of the second gap is greater than or equal to 5 μm and less than or equal to 10 μm.

[0024] In some embodiments, the glass coating method further includes the following steps:

[0025] The wet film on the glass is dried and cured to form an adhesive layer;

[0026] A resin layer is applied to the upper surface of the glass through the coating die.

[0027] The excess liquid on the upper surface of the glass is scraped off by the coating die head so that the liquid surface in the grooved area is flush with the liquid surface in the non-grooved area.

[0028] The resin layer on the glass is dried and cured.

[0029] In some embodiments, "drying and curing the resin layer on the glass" includes the following steps:

[0030] The glass was placed in a UV curing machine at a temperature of 850-1700 mJ / cm². 2 The UV curing machine uses energy to cure the UV light, and the wavelength of the UV light inside the UV curing machine is 275-320nm.

[0031] In some embodiments, the glass consists of multiple pieces, which are arranged at intervals on a substrate, and the glass coating apparatus simultaneously coats and scrapes the multiple pieces of glass. Attached Figure Description

[0032] Figure 1 This is a front view of the installation of the first gantry and coating assembly of the glass coating apparatus according to an embodiment of the present invention.

[0033] Figure 2 This is a side view of a glass coating apparatus according to an embodiment of the present invention.

[0034] Figure 3 This is a front view of the installation of the first gantry, the second gantry, and the coating assembly of the glass coating apparatus according to an embodiment of the present invention.

[0035] Figure 4 This is a schematic diagram of the glass coating apparatus of an embodiment of the present invention during the glass coating process.

[0036] Figure 5 This is a schematic diagram of the glass coating apparatus of this invention during the glass coating process.

[0037] Figure label:

[0038] 1. The First Dragon Gate;

[0039] 2. Second gate; 21. Roller;

[0040] 3. Coating assembly; 31. Coating die head; 32. First driving component; 321. First vacuum pump; 322. First guide rail; 323. First limiting block;

[0041] 4. Scraper assembly; 41. Scraper die head; 411. Scraper blade; 42. Third drive component; 421. Adjusting bolt;

[0042] 5. Elastic component; 51. Spring;

[0043] 6. Second drive component; 61. Second vacuum pump; 62. Second guide rail; 63. Second limit block;

[0044] 7. Glass; 71. Recessed area; 72. Non-recessed area;

[0045] 8. Resin layer. Detailed Implementation

[0046] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0047] The following is a reference appendix. Figures 1 to 5 A glass coating apparatus and coating method according to embodiments of the present invention are described.

[0048] like Figures 1 to 5 As shown, the glass coating apparatus according to an embodiment of the present invention includes a first gantry 1, a second gantry 2, a coating assembly 3, a scraper assembly 4, and a coating platform (not shown). The coating assembly 3 includes a coating die head 31, and the scraper assembly 4 includes a scraper die head 41.

[0049] like Figure 1 and Figure 3 As shown, the second gantry 2 is located on the first gantry 1 and its position is adjustable in the vertical direction. The coating die 31 is located on the first gantry 1 and its position is adjustable in the vertical direction. The scraper die 41 is connected to the second gantry 2, and the second gantry 2 can drive the scraper die 41 to adjust its position in the vertical direction. The coating platform is located at the lower end of the coating die 31 and the scraper die 41. The upper end of the coating platform is suitable for placing the glass 7. The position of the coating platform is adjustable in the front-back direction so that the coating die 31 and the scraper die 41 can coat and scrape the glass 7 respectively.

[0050] It is understood that in the glass coating apparatus of the embodiments of the present invention, the glass 7 coated by the glass coating apparatus can be ultra-thin glass or ordinary glass, and this application does not limit it.

[0051] According to an embodiment of the present invention, the glass coating apparatus can coat the chemical solution onto the glass 7 to form a wet film through the coating die 31, and then scrape the wet film on the glass 7 through the scraper die 41. This results in a more uniform film thickness on the glass 7, avoids glue dots, and improves the coating effect of the glass coating apparatus. In addition, the glass coating apparatus of the present invention allows for adjustment of the vertical positions of the coating component 3 and the scraper component 4, making the glass coating apparatus convenient to use, with a simple structural design and low cost.

[0052] In some embodiments, a substrate (not shown) is provided at the upper end of the coating platform. The substrate has a constant thickness, and the glass 7 is adapted to be placed on the upper end of the substrate. It is understood that the substrate is a rigid plate with uniform thickness. For example, the substrate can be stainless steel, quartz glass, marble, or acrylic sheet, and the adhesive between the substrate and the glass 7 can be one or more of UV-type release adhesive, pressure-sensitive adhesive, PU adhesive, and acrylic adhesive. The glass coating apparatus in the embodiments of the present invention, by providing a substrate, can make the wet film during glass 7 coating more uniform and free of coating marks, resulting in a better surface finish for the glass 7, improving the coating effect and achieving higher precision.

[0053] Optionally, a suction cup (not shown) is provided between the coating platform and the substrate. The suction cup adheres to the substrate, thus fixing the substrate relative to the coating platform. It is understood that the suction cup can be a vacuum suction cup or an electrostatic suction cup, thereby firmly adhering the substrate to the surface of the coating platform, improving the stability of the glass coating apparatus during operation, and resulting in higher coating precision. Optionally, waste liquid tanks and waste liquid pipelines can be respectively provided on the left and right sides of the coating platform to collect and discharge excess coating solution.

[0054] In some embodiments, such as Figure 3 As shown, the lower end of the second gantry 2 is equipped with rollers 21. There are two rollers 21, and they are respectively arranged at the left and right ends of the second gantry 2. During the coating of glass 7, the rollers 21 abut against the substrate. It can be understood that the rollers 21 are rigid wheels, and the coating die head 41 includes a scraper 411. The rollers 21 slide along the edge of the substrate, so that the scraper 411 and the substrate surface are always coated with the same slit width. Furthermore, since the rollers 21 on both sides of the second gantry 2 abut against the substrate, the coating die head 41 and the substrate can always maintain the same height, and there will be no problem of wet film thickness variation caused by uneven substrate thickness, resulting in a better coating effect for glass 7.

[0055] In some embodiments, such as Figure 3 As shown, the glass coating apparatus also includes an elastic element 5. The upper end of the elastic element 5 is connected to the first gantry 1, and the lower end of the elastic element 5 is connected to the second gantry 2. The elastic element 5 has an elastic force that causes the second gantry 2 to move towards the first gantry 1. For example, the elastic element 5 is a spring 51, and there are two springs 51, which are arranged at intervals along the left and right direction on the second gantry 2. It can be understood that the springs 51 connected to the first gantry 1 and the second gantry 2 provide an upward pulling force to the second gantry 2. This pulling force is slightly less than the weight of the second gantry 2, and its actual function is to reduce the pressure of the second gantry 2 on the substrate, so as to prevent the substrate from breaking due to excessive pressure.

[0056] Specifically, the coating assembly 3 also includes a liquid supply system (not shown), which is connected to the coating die 31. The coating die 31 has a liquid outlet slit (not shown). The liquid supply system supplies liquid into the coating die 31 and coats it onto the glass 7 through the liquid outlet slit. It is understood that the liquid outlet slit extends in the left-right direction and has a constant width, thereby improving the uniformity of liquid outlet from the coating die 31 and resulting in a better coating effect on the glass 7.

[0057] Optionally, such as Figure 1 As shown, the coating assembly 3 also includes a first driving component 32, which is connected to the first gantry 1 and the coating die 31 to adjust the position of the coating die 31 in the vertical direction. For example, the first driving component 32 can be a motor, a lead screw and a guide rail structure, or a control device such as an electric cylinder, a pneumatic cylinder or a hydraulic cylinder.

[0058] Specifically, such as Figure 1 and Figure 2 As shown, the first driving component 32 includes a first vacuum pump 321 and a first guide rail 322. The first vacuum pump 321 is mounted on the first gantry 1 and connected to the first guide rail 322. The first guide rail 322 is connected to the coating die 31. The first vacuum pump 321 can drive the first guide rail 322 to move, so that the first guide rail 322 drives the coating die 31 to move in the up and down direction, thereby adjusting the distance between the coating die 31 and the glass 7. Furthermore, the first driving component 32 also includes a first limiting block 323 and a second limiting block 63 mounted on the first gantry 1. When the first guide rail 322 moves to a preset position, the lower end of the first guide rail 322 abuts against the first limiting block 323, thereby restricting the coating die 31 from continuing to move downward, thus preventing the coating die 31 from crushing the glass 7, making the glass 7 coating device more reliable during use.

[0059] Optionally, such as Figure 3 As shown, the glass coating apparatus also includes a second drive component 6, which is connected to the second gantry 2 and the first gantry 1 to adjust the position of the second gantry 2 in the vertical direction. For example, the second drive component 6 can be a motor, lead screw, and guide rail structure, or it can be a control device such as an electric cylinder, pneumatic cylinder, or hydraulic cylinder.

[0060] Specifically, such as Figure 2 and Figure 3As shown, the second driving component 6 includes a second vacuum pump 61 and a second guide rail 62. The second vacuum pump 61 is mounted on the first gantry 1 and connected to the second guide rail 62, which is connected to the second gantry 2. The second vacuum pump 61 can drive the second guide rail 62 to move, thereby causing the second guide rail 62 to move the second gantry 2 in the vertical direction, thus adjusting the distance between the coating die 41 and the glass 7. Furthermore, the second driving component 6 also includes a second limiting block 63, which is mounted on the first gantry 1. When the second guide rail 62 moves to a preset position, the lower end of the second guide rail 62 abuts against the second limiting block 63, thereby restricting the coating die 41 from continuing to move downward, thus preventing the coating die 41 from crushing the glass 7, resulting in higher reliability of the glass 7 coating device during use.

[0061] Optionally, such as Figure 3 As shown, the coating assembly 4 also includes a third drive component 42, which is connected to the second gantry 2 and the coating die 41 to adjust the position of the coating die 41 in the vertical direction. For example, the third drive component 42 can be a motor, a lead screw and a guide rail structure, or a control device such as an electric cylinder, a pneumatic cylinder or a hydraulic cylinder.

[0062] Specifically, such as Figure 3 As shown, the third driving component 42 is an adjusting bolt 421. Multiple adjusting bolts 421 can be arranged at intervals along the left-right direction on the second gantry 2. The upper end of the adjusting bolt 421 is connected to the second gantry 2, and the lower end is connected to the coating die head 41. Therefore, by controlling the screwing in and out of the adjusting bolt 421, the position of the coating die head 41 can be precisely adjusted, thereby achieving precise control of the coating die head 41 and resulting in higher accuracy during the use of the glass 7 coating device. It is understood that, as... Figure 1 and Figure 3 As shown, before coating the glass 7, the coating die 31 located on the first gantry 1 and the second gantry 2 are lowered to appropriate positions, with the first gantry 1 lowered until the roller 21 can just completely press against the substrate. At this time, the height of the squeegee 41 located on the second gantry 2 is adjusted so that the squeegee 41 is lowered to a height where the gap between the squeegee 411 on the squeegee 41 and the non-bending area of ​​the glass 7 is 5-10 μm. The position of the coating platform is adjusted so that the coating die 31 is located at the coating start position on the substrate, and the squeegee 41 is located outside the coating area.

[0063] After coating begins, the liquid supply system starts working, and the chemical solution flows into the coating die 31 through pipelines and a three-way valve, filling the chip area inside the coating die 31 with the chemical solution. After coating begins, a uniform chemical solution waterfall is formed between the coating die 31 and the substrate. At the same time, the coating platform is controlled to move back and forth, so that a liquid film of uniform wet film thickness is formed on the surface of the glass 7. Simultaneously, the squeegee 41, which is outside the coating area, enters the coating area. The liftable roller 21, which is now controlled only by the gravity of the second gantry 2, precisely controls the slit width between the squeegee 411 and the substrate surface, scraping out a wet film parallel to the substrate. After completion, the second gantry 2 and the coating die 31 rise to the starting height, at which point the substrate and the glass 7 attached to the substrate are removed.

[0064] like Figures 1 to 5 As shown, a glass coating method according to another embodiment of the present invention is applied to a glass coating apparatus according to an embodiment of the present invention. The upper end surface of the glass 7 has a groove region 71 and a non-groove region 72. The glass coating method includes the following steps:

[0065] The glass is attached to the substrate, and the substrate is placed on the coating platform;

[0066] Move the coating die 31 up and down until there is a first gap between the coating die 31 and the glass 7;

[0067] Move the coating die 41 up and down until there is a second gap between the coating die 41 and the glass 7.

[0068] A wet film is applied to the upper surface of the glass 7 using the coating die 31;

[0069] Excess liquid on the upper surface of glass 7 is scraped off by the scraping die head 41 so that the liquid surface in the grooved area 71 and the liquid surface in the non-grooved area 72 are flush.

[0070] According to the glass coating method of the present invention, a liquid coating solution is applied to glass 7 through a coating die 31 to form a wet film, and then the wet film on glass 7 is scraped by a scraper die 41. This results in a more uniform film thickness on glass 7 and improves the coating effect of the glass coating apparatus. Furthermore, the glass coating apparatus of the present invention allows for adjustment of the vertical positions of the coating component 3 and the scraper component 4, making the glass coating apparatus convenient to use, with a simple structural design and low cost.

[0071] In another embodiment of the present invention, a high-precision camera can be used to scan and position the non-uniform thickness ultra-thin glass, and then a program can be set to control the amount of liquid discharged from the slit coating machine to make the wet film in the groove area 71 and the non-groove area 72 reach the same level, thereby making the coating precision of the glass 7 higher.

[0072] In some embodiments, the distance between the plane containing the bottom of the groove region 71 and the lower end surface of the glass 7 is greater than or equal to 30 μm and less than or equal to 50 μm. In other words, the thickness of the groove region 71 in the vertical direction is greater than or equal to 30 μm and less than or equal to 50 μm. The distance between the upper end surface of the non-groove region 72 and the lower end surface of the glass 7 is greater than or equal to 70 μm and less than or equal to 100 μm. In other words, the thickness of the non-groove region 72 in the vertical direction is greater than or equal to 70 μm and less than or equal to 100 μm. The size of the first gap is greater than or equal to 0.1 mm and less than or equal to 0.3 mm, and the size of the second gap is greater than or equal to 5 μm and less than or equal to 10 μm. The inventors of this application have discovered through experimental research that when the size of the glass 7, the size of the first gap, and the size of the second gap meet the above values, the coating effect of the glass 7 can be improved.

[0073] Furthermore, the glass coating method also includes the following steps:

[0074] The wet film on glass 7 is dried and cured to form an adhesive layer;

[0075] A resin layer 8 is applied to the upper surface of the glass 7 using a coating die 31.

[0076] Excess liquid on the upper surface of glass 7 is scraped off by the scraping die head 41 so that the liquid surface in the groove area 71 and the liquid surface in the non-groove area 72 are flush.

[0077] Glass 7 is placed in a UV curing machine and cured with an energy of 850-1700mJ / cm2. The wavelength of the UV light in the UV curing machine is 275-320nm.

[0078] The glass coating method of the embodiments of the present invention, through the above-described settings, can achieve a smaller thickness difference in the cured glass 7. In this application, the thickness difference of the cured glass 7 is ≤3µm. Therefore, the glass 7 coated by the glass coating method of the embodiments of the present invention is more uniform and has a better effect.

[0079] In some embodiments, the glass 7 consists of multiple pieces, which are arranged at intervals on the substrate. The glass coating apparatus simultaneously coats and scrapes the multiple pieces of glass 7, thereby improving the production efficiency of glass 7 coating.

[0080] like Figures 1 to 5 As shown, an embodiment of a specific glass coating method of the present invention is described below. The glass coating method includes:

[0081] (1) Glass attachment: The glass is attached to a rigid substrate with a relatively uniform thickness. The rigid substrate can be stainless steel, quartz glass, marble or acrylic sheet. The adhesive used for attachment can be UV-type adhesive, pressure-sensitive adhesive, PU adhesive or acrylic adhesive. The thickness of the groove area 71 in the middle of the glass 7 is 30-50um, and the thickness of the non-groove area 72 is 70-100um.

[0082] (2) Adjusting the machine: Lower the coating die head 31 and the second gantry 2 so that the gap between the coating die head 31 and the glass 7 is between 0.1-0.3mm. At this time, the roller 21 is also pressing on the substrate. After the substrate is removed, it can be lowered by another 0.03-0.07mm. Lower the scraping die head 41 set on the second gantry 2 and adjust the scraping blade so that the gap between the blade and the glass 7 is 5-10um.

[0083] (3) Coating of the bonding reinforcement layer: Control the coating platform so that the coating die 31 is in the coating start position, control the liquid supply system so that the liquid flows out evenly from the liquid outlet slit. At this time, control the movement of the coating platform so that a uniform wet film is formed on the surface of the glass 7. The thickness of the wet film is between 30-50um. When the scraper 411 on the scraper die 41 enters the coating area, the scraper 411 will scrape away the excess liquid and fill the groove area 71 of the glass 7 to be flush with the liquid surface of the non-groove area 72.

[0084] (4) Curing of the bonding reinforcement layer: After the substrate and the glass 7 attached to the substrate are coated, they are removed from the coating platform and pre-baked at 70-90℃ for 10 minutes. After pre-baking, they are aged at 130-140℃ for 60 minutes and then completely cured. After curing, the coating groove in the middle groove area 71 is still visible to the naked eye.

[0085] (5) Filling the resin layer coating: Control the coating platform so that the coating die 31 is in the coating start position, control the liquid supply system so that the liquid flows out evenly from the slit. At this time, control the platform to move so that a uniform wet film is formed on the surface of the glass 7. The thickness of the wet film is between 20-40um. When the scraper 411 on the scraper die 41 enters the coating area, the scraper 411 will scrape away the excess liquid and fill the groove area 71 of the glass 7 to be flush with the liquid surface of the non-groove area 72. The material used for filling the resin layer 8 is a UV type resin material with 100% solid content.

[0086] (6) Filling resin layer curing: After coating, the substrate and the glass 7 attached to the substrate are removed from the coating platform and placed in the UV curing machine. The UV light is cured with an energy of 850-1700mJ / cm2 and a wavelength of 275-320nm. After curing, there are no visible grooves in the paint film. The film thickness is measured at various points with a micrometer and the thickness difference is ≤3um.

[0087] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0088] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0089] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0090] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0091] In this invention, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0092] Although the above embodiments have been shown and described, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions and variations made to the above embodiments by those skilled in the art are within the protection scope of the present invention.

Claims

1. A glass coating apparatus, characterized in that, include: First Dragon Gate (1); The coating assembly (3) includes a coating die (31), which is located on the first gantry (1) and its position is adjustable in the vertical direction. The second gate (2) is located at the first gate (1) and its position is adjustable in the vertical direction; The coating assembly (4) includes a coating die (41), which is connected to the second gantry (2). The second gantry (2) can drive the coating die (41) to adjust its position along the vertical direction. A coating platform is provided at the lower end of the coating die (31) and the scraper die (41). The upper end of the coating platform is suitable for placing glass (7). The position of the coating platform in the front-back direction is adjustable so that the coating die (31) and the scraper die (41) can coat and scrape the glass (7) respectively. An elastic element (5) is provided, the upper end of which is connected to the first gantry (1) and the lower end of which is connected to the second gantry (2). The elastic element (5) has an elastic force that causes the second gantry (2) to move toward the first gantry (1). The elastic force is slightly less than the weight of the second gantry.

2. The glass coating apparatus according to claim 1, characterized in that, The upper end of the coating platform is provided with a substrate, the thickness of which is constant, and the glass (7) is adapted to be placed on the upper end of the substrate.

3. The glass coating apparatus according to claim 2, characterized in that, The lower end of the second gantry (2) is provided with rollers (21). There are two rollers (21), and the two rollers (21) are respectively arranged at the left and right ends of the second gantry (2). When the glass is coated, the rollers (21) abut against the substrate.

4. The glass coating apparatus according to claim 2, characterized in that, A suction cup is provided between the coating platform and the substrate, and the suction cup is attached to the substrate to fix the substrate relative to the coating platform.

5. The glass coating apparatus according to claim 1, characterized in that, The elastic element (5) is a spring (51), and there are two springs (51), which are arranged at intervals in the left and right direction on the second gantry (2).

6. The glass coating apparatus according to claim 1, characterized in that, The coating assembly (3) further includes a liquid supply system connected to the coating die (31). The coating die (31) has a liquid outlet slit. The liquid supply system is used to supply liquid into the coating die (31) and coat it onto the glass (7) through the liquid outlet slit.

7. The glass coating apparatus according to any one of claims 1-6, characterized in that, The coating assembly (3) further includes a first driving component (32), which is connected to the first gantry (1) and the coating die (31) to adjust the position of the coating die (31) along the vertical direction. And / or, the glass coating apparatus further includes a second drive component (6), which is connected to the second gantry (2) and the first gantry (1) for adjusting the position of the second gantry (2) along the vertical direction; And / or, the coating assembly (4) further includes a third drive component (42) connected to the second gantry (2) and the coating die (41) for adjusting the position of the coating die (41) relative to the second gantry (2).

8. A glass coating method, characterized in that, A glass coating apparatus according to any one of claims 1-7, wherein the upper end surface of the glass (7) has a grooved region (71) and a non-grooved region (72), the glass coating method comprising the following steps: The glass (7) is attached to the substrate, and the substrate is placed on the coating platform; The coating die (31) is moved up and down until a first gap is formed between the coating die (31) and the glass (7); Move the coating die (41) up and down until there is a second gap between the coating die (41) and the glass (7); A wet film is applied to the upper surface of the glass (7) through the coating die (31); Excess liquid on the upper surface of the glass (7) is scraped off by the scraper head (41) so that the liquid surface in the groove area (71) is flush with the liquid surface in the non-groove area (72).

9. The glass coating method according to claim 8, characterized in that, The distance between the bottom of the groove area (71) and the lower end face of the glass (7) is greater than or equal to 30 μm and less than or equal to 50 μm; the distance between the upper end face of the non-groove area (72) and the lower end face of the glass (7) is greater than or equal to 70 μm and less than or equal to 100 μm; the size of the first gap is greater than or equal to 0.1 mm and less than or equal to 0.3 mm; the size of the second gap is greater than or equal to 5 μm and less than or equal to 10 μm.

10. The glass coating method according to claim 8, characterized in that, It also includes the following steps: The wet film on the glass (7) is dried and cured to form an adhesive layer; A resin layer is applied to the upper surface of the glass (7) through the coating die (31); Excess liquid on the upper surface of the glass (7) is scraped off by the scraping die (41) so that the liquid surface in the groove area (71) and the liquid surface in the non-groove area (72) are flush. The resin layer on the glass (7) is dried and cured.

11. The glass coating method according to claim 10, characterized in that, "Drying and curing the resin layer on the glass (7)" includes the following steps: The glass (7) is placed in an ultraviolet curing machine and cured with an energy of 850-1700 mJ / cm2. The wavelength of the ultraviolet light in the ultraviolet curing machine is 275-320nm.

12. The glass coating method according to claim 10, characterized in that, The glass (7) consists of multiple pieces, which are arranged at intervals on the substrate. The glass coating device simultaneously coats and scrapes the multiple pieces of glass (7).

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