Glass coating device and coating method thereof

Abstract

The invention relates to the technical field of glass coating, and particularly discloses a glass coating device and a coating method thereof. By arranging a cleaning blue strip of the cleaning mechanism, a large number of glass blanks are cleaned before plating; a coating material in a molten state is sprayed above a vacuum coating chamber of the coating machine according to a preset angle by a spray head of the coating machine, so that particles of the coating material in the molten state are smaller, the distribution is more uniform, and the coating effect is better; a distribution box for more stable current supply is arranged, so that particles of the membrane material are ensured to be smaller from the side surface; and the smoothness of the coated glass blank can reach the zero-level smoothness of an optical lens.

Description

Technical Field

[0001] The present invention relates to the technical field of glass coating, and in particular to a glass coating device and a coating method thereof. Background Art

[0002] Coated glass is also called reflective glass. Coated glass is a glass surface coated with one or more layers of metal, alloy or metal compound film to change the optical properties of the glass to meet certain specific requirements. Coated glass can be divided into the following categories according to the different characteristics of the product: heat reflective glass, low-emissivity glass (Low-E), conductive film glass, etc. There are many methods for producing coated glass, mainly vacuum magnetron sputtering, vacuum evaporation, chemical vapor deposition, and sol-gel method. Magnetron sputtering coated glass can design and manufacture multi-layer complex film systems using magnetron sputtering technology, and can be coated with a variety of colors on a white glass substrate. The film layer has good corrosion resistance and wear resistance, and is currently one of the most produced and used products. There is a certain gap in the variety and quality of vacuum evaporation coated glass compared with magnetron sputtering coated glass, and it has been gradually replaced by vacuum sputtering. Chemical vapor deposition is to introduce reactive gas into the float glass production line to decompose on the hot glass surface and evenly deposit on the glass surface to form coated glass. The characteristics of this method are low equipment investment, easy control, low product cost, good chemical stability, and thermal processing. It is one of the most promising production methods. The sol-gel method is simple to produce coated glass with good stability. The disadvantage is that the product light transmittance is too high and the decorative effect is poor.

[0003] The existing glass coating device and method always have poor coating effect due to impurities on the inner wall of the vacuum box, the spray angle during evaporation coating and the instability of the current. The existing glass can only achieve a smoothness of 4-5 after coating. The smoothness of the glass after coating is not high, and it will lead to a high scrap rate and increased costs.

[0004] Therefore, there is an urgent need for a glass coating device and method with better coating effect. Summary of the invention

[0005] In view of this, an embodiment of the present invention provides a glass coating device and a coating method thereof, so as to solve the problem that the coated glass prepared by the existing glass coating device and method has insufficient smoothness and high scrap rate.

[0006] In a first aspect, an embodiment of the present invention provides a glass coating device, the glass coating device comprising:

[0007] A cleaning mechanism, comprising a plurality of blue cleaning strips, one side of which is provided with a plurality of teeth, each pair of the blue cleaning strips being arranged with the teeth back to back, a cavity being formed between the four teeth of every two pairs of the blue cleaning strips, the cavity being used to place the glass blanks to be cleaned; a coating machine, comprising a vacuum coating chamber, a blank placing tray, a coating material placing table and a spraying table, the blank placing tray, the coating material placing table and the spraying table being all arranged in the vacuum coating chamber; the blank placing tray is arranged at the top of the vacuum coating chamber, and a plurality of blank fixtures are arranged on a side of the blank placing tray for placing the blanks; the spraying table is arranged at the bottom of the vacuum coating chamber, the coating material placing table is arranged on the spraying table, the coating material placing table is connected to the spraying table through a pipeline, and a plurality of nozzles are also arranged on the spraying table; a power supply mechanism, the power supply mechanism is electrically connected to the coating mechanism.

[0008] As a preferred technical solution of the embodiment of the present invention, the blank placement tray is an arc-shaped tray, and the opening end of the blank placement tray faces the injection station.

[0009] As a preferred technical solution of an embodiment of the present invention, the spraying platform forms a plane, and the plurality of spray heads are arranged at a preset angle to the plane of the spraying platform.

[0010] As a preferred technical solution of the embodiment of the present invention, after the glass blanks are placed on the blank placement plate, a relatively wide gap is left between the blank placement plate and the top of the vacuum coating chamber.

[0011] As a preferred technical solution of an embodiment of the present invention, the power supply mechanism includes a distribution box and a control circuit, and the power supply mechanism provides a stable current to the coating machine through the distribution box and the control circuit.

[0012] As a preferred technical solution of the embodiment of the present invention, the air quality of the vacuum coating chamber should reach Class 0 air quality.

[0013] In a second aspect, a coating method is provided. The coating method is applied in a glass coating device as described in any one of the above items, and the glass coating method comprises:

[0014] S1: placing the glass blank on the cleaning blue strip for cleaning before plating;

[0015] S2: Adjust the air quality of the vacuum coating chamber to level 0;

[0016] S3: Loading the cleaned glass blank into the vacuum coating chamber for automatic coating.

[0017] As a preferred technical solution of the embodiment of the present invention, before S3, the following is also included:

[0018] S301: cleaning the coating material and placing it on the coating material placement table;

[0019] S302: Pumping the vacuum coating chamber to a preset vacuum degree;

[0020] S303: turning the coating mechanism on to a high pressure mode, preheating the nozzle and pre-melting the coating material.

[0021] As a preferred technical solution of the embodiment of the present invention, the step S3 further includes:

[0022] S31: After the glass blank is coated, it is kept warm for a preset time;

[0023] S32: After the glass blank is coated, it is kept warm for a preset time and then cooled for a preset time;

[0024] S33: after the glass blank is cooled, the vacuum coating chamber is deflated;

[0025] Wherein, the time of heat preservation and cooling cannot be less than 5 minutes.

[0026] In summary, the beneficial effects of the present invention are as follows:

[0027] In order to solve the above-mentioned technical problems, an embodiment of the present invention provides a glass coating device and a coating method thereof, wherein a cleaning blue strip of a cleaning mechanism is provided to simultaneously clean a large number of glass blanks before plating; the coating material in a molten state is sprayed at a preset angle by the nozzle of the coating machine over the vacuum coating chamber of the coating machine, so that the particles of the coating material in the molten state are smaller, the distribution is more uniform, and the coating effect is better; and a distribution box with more stable current supply is provided, which ensures from the side that the particles of the film material are smaller; so that the smoothness of the glass blank after coating can reach the zero-level smoothness of optical lenses. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solution of the embodiment of the present invention, the drawings required for use in the embodiment of the present invention will be briefly introduced below. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work, and these are all within the protection scope of the present invention.

[0029] Figure 1 is a schematic diagram of a glass coating device;

[0030] Figure 2 It is a schematic diagram of a cleaning mechanism of a glass coating device;

[0031] Figure 3 It is a schematic diagram of the process of a coating method;

[0032] Figure 4 yes Figure 3 A schematic diagram of the steps before step S3;

[0033] Figure 5 yes Figure 3 A schematic flow chart of the steps included after step S3;

[0034] Parts and numbers in the figure: 1-glass blank, 2-coating material, 10-coating machine, 11-blank placement plate, 12-workbench, 13-nozzle, 20-power supply mechanism, 30-cleaning mechanism, 31-glass blank placement position, 32-cleaning blue strip. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described in conjunction with the drawings in the embodiment of the present invention. It should be noted that, in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. In the description of the present invention, it should be understood that the orientation or position relationship indicated by the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the present invention. Moreover, the term "include", "comprise" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such a process, method, article or device. In the absence of further restrictions, the elements defined by the phrase "comprising..." do not exclude the presence of other identical elements in the process, method, article or device comprising the elements. If there is no conflict, the various features in the embodiments and examples of the present invention can be combined with each other, all within the scope of protection of the present invention.

[0036] Example 1

[0037] See also Figure 1 to Figure 2 The embodiment of the present invention provides a glass coating device, characterized in that the glass coating device comprises:

[0038] The cleaning mechanism 30 includes a plurality of cleaning blue strips 32, a plurality of teeth are provided on one side of the cleaning blue strips 32, each pair of the cleaning blue strips 32 is arranged with the teeth facing each other, and a cavity is formed between the four teeth of each two pairs of the cleaning blue strips 32; each of the cleaning mechanisms 30 has a plurality of the cleaning blue strips 32, and a plurality of cavities for accommodating glass blanks 1 can be formed by the teeth between the cleaning blue strips 32, so that a plurality of glass blanks 1 can be cleaned at one time; as a preferred technical solution of this embodiment, the cleaning blue strips 32 are made of metal material;

[0039] The coating machine 10 comprises a vacuum coating chamber, a blank placing tray 11, a coating material 2 placing table and a spraying table, wherein the blank placing tray 11, the coating material placing table and the spraying table are all arranged in the vacuum coating chamber;

[0040] The blank placement tray 11 is arranged on the top of the vacuum coating chamber, and the blank placement tray 11 is an arc-shaped tray. The blank placement tray 11 is an arc-shaped circular tray, and the open end of the blank placement tray 11 faces the spraying platform; the non-open end of the blank placement tray 11 is also provided with a plurality of fixtures (not shown). When in use, the glass blank 1 is placed on the fixtures for fixing to prevent the glass blank 1 from loosening during coating and causing uneven coating; after the glass blank 1 is placed on the blank placement tray 11, a wide gap is left with the top of the vacuum coating chamber. During coating, the dissolved coating material 2 is sprayed onto the top of the vacuum coating chamber and then falls onto the glass blank 1 to complete the coating. If the gap is small, the spraying force of the nozzle 13 will be preset to be large, and it is easy to spray to the top of the vacuum coating chamber and adhere, which makes it difficult to complete the coating work on the glass blank 1;

[0041] The air quality of the vacuum coating room should reach the zero-level air quality. When the glass blank 1 is coated, there will be many problems that affect its coating quality, such as impurities on the inner wall of the coating machine 10 and impurities in the air. This invention adopts the zero-level air quality inside the vacuum coating room to eliminate impurities in the air and the inner wall of the coating machine 10, so that the final finish of the glass blank 1 after coating can reach the zero-level finish;

[0042] The spraying platform is arranged at the bottom of the vacuum coating chamber, the coating material 2 placing platform is arranged on the spraying platform, the coating material 2 placing platform is connected to the spraying platform through a pipeline, and a plurality of nozzles 13 are also arranged on the spraying platform; the spraying platform forms a plane, and the plurality of nozzles 13 are arranged at a preset angle with the plane of the spraying platform; after the coating material 2 is dissolved, it is guided to the pipeline and sprayed to the upper part of the interior of the vacuum coating chamber through the nozzle 13; but the existing spraying method is to spray at an angle perpendicular to the nozzle 13 and the spraying platform, which will cause the sprayed coating material 2 to fail to uniformly complete the coating of the glass blank 1; now the spraying is performed at an angle of 30-60° between the nozzle 13 and the spraying platform, preferably at an angle of 40°, so that the coating material 2 can be uniformly coated on the glass blank 1, and the smoothness of the glass blank 1 after coating can reach the zero-level smoothness requirement of optical glass through the setting of this angle, thereby increasing the yield rate and the excellent product rate of the glass blank 1, and greatly reducing the production cost;

[0043] A power supply mechanism, which is electrically connected to the coating mechanism; the power supply mechanism transmits stable current to the coating machine; the power supply mechanism includes, since the stability of the current of the power supply mechanism will also affect the dissolution quality of the coating material 2 during coating, when the dissolution quality of the coating material 2 is high, the particles of the coating material 2 after dissolution are very small, and no impurities will be generated on the glass blank 1 during coating; when the dissolution quality of the coating material 2 is low, the particles of the coating material 2 after dissolution will be larger, or the particles of the coating material 2 after dissolution are uneven in size due to the instability of the current, which will result in poor coating quality of the glass blank 1, failing to meet the standards, and resulting in waste.

[0044] Example 2

[0045] An embodiment of the present invention provides a coating method, which is applied in a glass coating device as described in any one of the above items, and the glass coating method includes:

[0046] S1: placing the glass blank on the cleaning blue strip for cleaning before plating;

[0047] Since there may be more or less impurities on the glass blank 1, it is necessary to use the cleaning mechanism 30 to prepare for cleaning before coating; the glass blank 1 is placed in the glass blank 1 placement position 31 formed by the teeth of each cleaning blue strip 32 of the cleaning mechanism 30 for cleaning. Each cleaning mechanism 30 has a large number of glass blank 1 placement positions 31, and a large number of glass blanks 1 can be cleaned at one time;

[0048] S2: Adjust the air quality of the vacuum coating chamber to level 0;

[0049] Adjust the air quality of the vacuum coating room to reach level 0, and use an air quality detector to detect whether the air quality of the vacuum coating room is reached, so that the air quality of the vacuum coating room reaches level 0;

[0050] S3: loading the cleaned glass blank into the vacuum coating chamber for automatic coating;

[0051] The glass blank 1 is placed on the fixture provided on the blank placement plate 11 for fixing; the film system (film system: 1st layer: MGF2-57NM; 2nd layer: H4-19.3NM; 3rd layer: MGF2-54.5; 4th layer: H4-60.3NM; 5th layer: MGF2-16NM; 6th layer: H4-55.7NM; 7th layer: MGF2-116.3NM) is selected on the coating machine 10 and then the automatic coating is started;

[0052] Coating parameters:

[0053] The coating temperature is 260 degrees constant temperature; the time is 15-20 minutes; the vacuum degree is 1.0*10-3Pa.

[0054] Before step S3, the method further includes

[0055] S301: cleaning the coating material;

[0056] Clean the coating material 2 to reduce external impurities in the coating material 2 so that there are no larger granular impurities after dissolution, and avoid impurities adhering to the glass blank 1 during coating to become waste; the coating material 2 is cleaned by ion cleaning for about 2-5 minutes (current 160A, shielding 400V);

[0057] S302: Pumping the vacuum coating chamber to a preset vacuum degree;

[0058] The glass blank 1 is coated in the vacuum environment of the vacuum coating chamber, and the vacuum degree of the vacuum coating chamber is pumped to 1.0*10-3PA, and the vacuuming time is generally 20-40min;

[0059] S303: turning the coating mechanism on to a high pressure mode, preheating the nozzle and pre-melting the coating material 2;

[0060] Open the nozzle, turn on the high pressure mode of the coating machine to start pre-dissolving the coating material 2; after the pre-dissolving of the coating material 2 is completed, turn off the high pressure mode and let the nozzle cool down for about 2-5 minutes.

[0061] After step S3, the method further includes:

[0062] S31: After the glass blank is coated, it is kept warm for a preset time;

[0063] After the coating of the glass blank 1 is completed, the coating material 2 in the molten state has not yet completely adhered to the glass blank 1, and the coating material 2 in the molten state is kept warm for 5-10 minutes to complete the coating of the glass blank 1 with the coating material 2 in the molten state;

[0064] S32: After the glass blank is coated, it is kept warm for a preset time and then cooled for a preset time;

[0065] After the coating of the glass blank 1 is completed, the coating material 2 in the molten state has not yet completely solidified, and needs to be cooled for about 10-30 minutes until the coating material 2 after the coating is completed solidifies;

[0066] S33: after the cooling is completed, the vacuum coating chamber is deflated;

[0067] After the glass blank 1 has been cooled, all coating processes have been completed, the coating machine 10 is vented, and the workpiece is taken out.

[0068] Since the smoothness of the glass processed by the present invention after coating can reach the zero-level smoothness of optical glass, the following precautions are required for the process:

[0069] (1) The vacuum chamber must be kept clean and the test air quality must reach level 0 air quality

[0070] (2) Before loading the glass blank 1, the coating material 2 is loaded and vacuumed for a preset time before loading the glass blank for coating;

[0071] (3) After coating, it is necessary to keep warm and cool, and then start to release the air.

[0072] After the workpiece is coated, the smoothness is checked by using a spotlight and a magnifying glass. After coating, the wavelength is 400-700nm, the broadband R is less than 0.5%, and the smoothness can reach the zero-level smoothness of optical glass.

[0073] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features can be replaced by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A glass coating device, characterized in that: The glass coating device comprises: The cleaning mechanism comprises a plurality of cleaning blue bars, a plurality of teeth are arranged on one side of the cleaning blue bars, each pair of the cleaning blue bars are arranged with the teeth facing each other, a cavity is formed between the four teeth of each two pairs of the cleaning blue bars, and the cavity is used to place the glass blank to be cleaned; The coating machine comprises a vacuum coating chamber, a blank placing tray, a coating material placing table and a spraying table, wherein the blank placing tray, the coating material placing table and the spraying table are all arranged in the vacuum coating chamber; The blank placement plate is arranged on the top of the vacuum coating chamber, and a plurality of blank fixtures are arranged on one side of the blank placement plate for placing the blanks; The spraying platform is arranged at the bottom of the vacuum coating chamber, the coating material placing platform is arranged on the spraying platform, the coating material placing platform is connected to the spraying platform through a pipeline, and a plurality of spray heads are also arranged on the spraying platform; A power supply mechanism is electrically connected to the coating mechanism.

2. The glass coating device according to claim 1, characterized in that: The blank placement plate is in an arc-shaped plate shape, and the opening end of the blank placement plate faces the injection platform.

3. The glass coating device according to claim 1, characterized in that: The spraying platform forms a plane, and the plurality of spray heads are arranged at a preset angle to the plane of the spraying platform.

4. The glass coating device according to claim 1, characterized in that: After the glass blanks are placed on the blank placement plate, a relatively wide gap is left between the blank placement plate and the top of the vacuum coating chamber.

5. The glass coating device according to claim 1, characterized in that: The power supply mechanism includes a distribution box and a control circuit, and the power supply mechanism provides a stable current to the coating machine through the distribution box and the control circuit.

6. The glass coating device according to claim 1, characterized in that: The air quality of the vacuum coating room should reach Class 0 air quality.

7. A coating method, characterized in that: The coating method is applied in the glass coating device as described in any one of claims 1 to 6 above, and the glass coating method comprises: S1: placing the glass blank on the cleaning blue strip for cleaning before plating; S2: Adjust the air quality of the vacuum coating chamber to level 0; S3: Loading the cleaned glass blank into the vacuum coating chamber for automatic coating.

8. The coating method according to claim 7, characterized in that: The S3 also includes: S301: cleaning the coating material and placing it on the coating material placement table; S302: Pumping the vacuum coating chamber to a preset vacuum degree; S303: turning the coating mechanism on to a high pressure mode, preheating the nozzle and pre-melting the coating material.

9. The coating method according to claim 7, characterized in that: The S3 also includes: S31: After the glass blank is coated, it is kept warm for a preset time; S32: After the glass blank is coated, it is kept warm for a preset time and then cooled for a preset time; S33: after the glass blank is cooled, the vacuum coating chamber is deflated; Wherein, the time of heat preservation and cooling cannot be less than 5 minutes.

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