Optical coating method

Abstract

The invention provides an optical coating method. The optical coating method comprises the following steps: S1, manufacturing a protective coating on a non-coating area on the surface of a workpiece to be processed; s2, the film coating area and at least part of the non-film coating area of the workpiece to be machined are subjected to film coating treatment; and S3, removing the protective coating in the non-coating area. According to the optical coating method provided by the embodiment of the invention, the protective coating is arranged in the non-coating area before coating, and the protective coating in the non-coating area is removed after coating, so that the non-coating area does not need to be shielded by a fixture, a high-precision fixture does not need to be customized for each different workpiece to be processed, the material and processing cost is reduced, and the production efficiency is improved. Meanwhile, the maintenance and replacement cost of the clamp is avoided, and the overall manufacturing cost is further reduced; moreover, the optical coating method provided by the embodiment of the invention is suitable for to-be-processed workpieces with various shapes and sizes, and the processing flexibility and adaptability are enhanced.

Description

Technical Field

[0001] The present invention relates to the technical field of coating technology, and in particular to an optical coating method. Background Art

[0002] Vacuum coating is a process in which the coating material (such as metal, alloy or compound) is evaporated by heating in a vacuum environment and gasified, and the particles then fly to the surface of the workpiece to condense into a film. Evaporation is known for its simple film formation method, high film purity, good density, unique film structure and performance, and is widely used in electronics, optics, semiconductors and other fields.

[0003] During the coating process, the coating fixture is used to directly block the non-coating area to ensure that coating is only performed on the designated area. Since the fixture needs to be precisely matched with the non-coating area, the manufacturing accuracy requirements are extremely strict. High-precision fixtures not only increase the difficulty of design and processing, but also increase manufacturing costs. Summary of the invention

[0004] The present invention provides an optical coating method, which is used to solve the defect in the prior art that the coating process has high requirements on the accuracy of fixtures, thereby increasing the cost, and realize low-cost coating.

[0005] The present invention provides an optical coating method, comprising: S1. Make a protective coating on the non-coated area of ​​the surface of the workpiece to be processed; S2, performing coating treatment on the coated area and at least part of the non-coated area of ​​the workpiece to be processed; S3, removing the protective coating in the non-coated area.

[0006] In some embodiments, the S1 includes: S11, fixing the workpiece to be processed on the tooling; S12, applying paint to the non-coating area; S13, adjusting the position of the workpiece to be processed, and repeating steps S11 to S12 until all non-coated areas on the workpiece to be processed are coated with paint.

[0007] In some embodiments, the S12 includes: S121, covering the top surface of the workpiece with a screen, wherein the screen has a transparent area and an isolation area, wherein the transparent area corresponds to the non-coated area, and the isolation area corresponds to the coated area; S122, applying paint on the silk screen.

[0008] In some embodiments, the S12 includes: S123, repeatedly brushing the material-permeable area on the screen with a scraper.

[0009] In some embodiments, the S1 includes: S14, baking the workpiece to be processed so that the coating forms the protective coating; S15, performing coating treatment on the workpiece to be processed with the protective coating.

[0010] In some embodiments, the baking temperature is 150 degrees to 250 degrees, and the baking time is 40 minutes to 50 minutes.

[0011] In some embodiments, the S15 includes: S151, placing the workpiece to be processed in a fixture; S152, performing vacuum coating treatment on the workpiece to be processed.

[0012] In some embodiments, the fixture includes a slot, the workpiece to be processed is installed in the slot, a through hole is provided on the bottom wall of the slot, and the coating area is opposite to the through hole.

[0013] In some embodiments, the S152 includes: S1521, coating the bottom surface of the workpiece to be processed; S1522, adjusting the position of the workpiece to be processed until each surface of the workpiece to be processed has completed the coating process.

[0014] In some embodiments, the tooling includes a fixing member, the fixing member is provided with a groove, and the shape of the groove is adapted to the shape of the workpiece to be processed; The tooling includes a positioning piece, which is arranged on the fixing piece and surrounds the groove.

[0015] The optical coating method of the embodiment of the present invention sets a protective coating on the non-coated area before coating, and removes the protective coating on the non-coated area after coating, so there is no need to use a fixture to block the non-coated area, and there is no need to customize high-precision fixtures for each different workpiece to be processed, which reduces material and processing costs. At the same time, the maintenance and replacement costs of the fixtures are avoided, further reducing the overall manufacturing cost. Moreover, the optical coating method of the embodiment of the present invention is applicable to workpieces to be processed of various shapes and sizes, enhancing the flexibility and adaptability of processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a schematic flow chart of the optical coating method provided by the present invention.

[0018] Figure 2 It is a schematic flow chart of step S1 of the optical coating method provided by the present invention.

[0019] Figure 3 It is a schematic flow chart of step S12 of the optical coating method provided by the present invention.

[0020] Figure 4 It is a schematic flow chart of step S15 of the optical coating method provided by the present invention.

[0021] Figure 5 It is a schematic flow chart of step S152 of the optical coating method provided by the present invention.

[0022] Figure 6 It is a schematic structural diagram of a workpiece to be processed in the optical coating method provided by the present invention.

[0023] Figure 7 It is a schematic structural diagram of a tooling for the optical coating method provided by the present invention.

[0024] Figure 8 It is a schematic diagram of the working status of the tooling and screen of the optical coating method provided by the present invention.

[0025] Fig. 9 It is a schematic diagram of the structure of a fixture for the optical coating method provided by the present invention.

[0026] Fig.10 It is a schematic diagram of the partial structure of the screen in the optical coating method provided by the present invention.

[0027] Reference numerals: 1. Workpiece to be processed; 11. Coating area; 12. Non-coating area; 2. fixture; 21. slot; 22. through hole; 3. Tooling; 31. Groove; 32. Fixing piece; 33. Positioning piece; 4. Silk screen. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] like Figures 1 to 10 As shown, an embodiment of the present invention discloses an optical coating method, comprising: S1, forming a protective coating on a non-coated area 12 on the surface of a workpiece 1 to be processed; S2, performing coating treatment on the coating area 11 and at least part of the non-coating area 12 of the workpiece 1; S3, removing the protective coating on the non-coated area 12.

[0030] The surface of the workpiece 1 is divided into a coating area 11 and a non-coating area 12 .

[0031] First, a protective coating is formed on the non-coated area 12. This protective material can effectively block the deposition of the coating material, ensuring that these areas remain in their original state in subsequent steps.

[0032] Next, the entire surface of the workpiece 1 is subjected to coating treatment, including the coating area 11 and at least part of the non-coating area 12. In this way, all areas requiring coating can be completed in one operation, thereby improving production efficiency.

[0033] Finally, after the coating is completed, the protective coating of the non-coated area 12 is removed to restore the original state of these areas, thereby preventing the film layer from being mistakenly plated on the non-coated area 12. The cleaning method can be mechanical cleaning, such as rubbing, friction and the like.

[0034] The coating area of ​​the non-coating region 12 is determined according to actual working conditions. For example, the non-coating region 12 is coated at the edge of the coating region 11 , or the entire non-coating region 12 is coated.

[0035] In the related art, in order to ensure that the coating is only performed on the designated coating area 11 without affecting the non-coating area 12, the fixture 2 is used to directly cover the main non-coating area 12 during coating to ensure that the coating is performed only on the designated area. Since the fixture 2 needs to be precisely matched with the non-coating area 12, the manufacturing accuracy requirements are extremely strict. The high-precision fixture 2 not only increases the difficulty of design and processing, but also increases the manufacturing cost.

[0036] The optical coating method of the embodiment of the present invention sets a protective coating on the non-coated area 12 before coating, and removes the protective coating on the non-coated area 12 after coating, so that there is no need to use the fixture 2 to block the non-coated area 12, and there is no need to customize high-precision fixtures 2 for each different workpiece 1 to be processed, thereby reducing material and processing costs. At the same time, the maintenance and replacement costs of the fixture 2 are avoided, further reducing the overall manufacturing cost. Moreover, the optical coating method of the embodiment of the present invention is applicable to workpieces 1 to be processed of various shapes and sizes, enhancing the flexibility and adaptability of processing.

[0037] Therefore, the optical coating method of the embodiment of the present invention has the advantages of low processing cost and high processing flexibility.

[0038] like Figure 2 As shown, in some embodiments, S1 includes: S11, fixing the workpiece 1 to be processed on the tooling 3; S12, applying paint to the non-coating area 12; S13, adjusting the position of the workpiece 1 to be processed, and repeating steps S11 to S12 until all the non-coating areas 12 on the workpiece 1 to be processed are coated with paint.

[0039] First, select a suitable tool 3 to accurately place and firmly clamp the workpiece 1 to be processed to ensure that it will not shift or shake during subsequent operations.

[0040] Next, a layer of coating is evenly applied to a non-coated area 12. After the coating of the area is completed, the position of the workpiece 1 to be processed is adjusted to expose the next uncoated non-coated area 12, and the above coating and curing steps are repeated until all non-coated areas 12 are coated with protective coating to ensure that there are no omissions.

[0041] like Figure 3 As shown, in some embodiments, S12 includes: S121, covering the top surface of the workpiece 1 with a screen 4, wherein the screen 4 has a transparent area and an isolation area, wherein the transparent area corresponds to the non-coated area 12, and the isolation area corresponds to the coated area 11; S122, applying paint on the screen 4.

[0042] The screen 4 has a transparent area and an isolated area. The transparent area corresponds to the non-coated area 12 , and the isolated area corresponds to the coated area 11 .

[0043] There are many small holes on the permeable area, and the paint can pass through the screen 4 through the small holes and fall on the non-coated area 12 of the workpiece 1 to be processed. There are no small holes on the isolation area, and even if the paint is applied on the isolation area, it will not pass through and fall on the coated area 11 of the workpiece 1 to be processed.

[0044] Optionally, different screens 4 are pre-made according to different positions of the workpiece 1 to be processed, so that the coating can fall accurately on the non-coating area 12 .

[0045] During the operation, the screen 4 is first gently covered on the top surface of the workpiece 1 fixed on the tooling 3, ensuring that the screen 4 is flat and wrinkle-free, so that the permeable area is accurately aligned with the non-coated area 12 to be protected, and the isolation area covers and protects the coated area 11 to prevent ink penetration. Next, paint is applied on the screen 4.

[0046] The optical coating method of the embodiment of the present invention can not only provide efficient and accurate protection for the non-coated area 12, but also ensure the quality and accuracy of the subsequent coating treatment, and is suitable for various complex-shaped workpieces 1 to be processed.

[0047] In some embodiments, S12 includes: S123, repeatedly brushing the permeable area with a scraper on the screen 4. Use the scraper to apply pressure evenly, so that the ink penetrates through the permeable area to the non-coated area 12 on the surface of the workpiece 1 to be processed, and at the same time ensure that the isolation area effectively blocks the ink from entering the coated area 11. This process requires repeatedly brushing the scraper to ensure that the ink is evenly distributed and completely covers all designated non-coated areas 12 to avoid any omissions or unevenness.

[0048] like Figure 2 As shown, in some embodiments, S1 includes: S14, baking the workpiece 1 so that the paint forms a protective coating; S15, performing coating treatment on the workpiece 1 to be processed with the protective coating.

[0049] After the coating of the non-coating area 12 is completed, the workpiece 1 is first placed in an oven preheated to an appropriate temperature and baked for a certain period of time to ensure that the coating is fully cured and firmly adheres to the surface of the workpiece 1 to form a uniform and dense protective coating. This step is crucial because it not only makes the coating have sufficient high temperature resistance and chemical stability, but also ensures that it will not fall off or shift during the subsequent coating process, thereby effectively protecting the non-coating area 12.

[0050] After baking, the workpiece 1 is taken out and the quality of the protective coating is checked. After confirming that there are no bubbles, cracks or other defects, it is sent to the coating equipment for coating treatment.

[0051] In some embodiments, the baking temperature is 150 degrees to 250 degrees, and the baking time is 40 minutes to 50 minutes. For example, the baking temperature is 150 degrees, 200 degrees or 250 degrees. The baking time is 40 minutes, 45 minutes or 50 minutes. The optical coating method of the embodiment of the present invention, by accurately controlling the baking conditions, not only makes the coating have sufficient high temperature resistance and chemical stability, but also ensures that it will not fall off or shift in the subsequent coating process, thereby effectively protecting the non-coating area 12.

[0052] like Figure 4 As shown, in some embodiments, S15 includes: S151, placing the workpiece 1 to be processed in the fixture 2; S152, performing vacuum coating treatment on the workpiece 1.

[0053] After baking is completed and the protective coating is formed, the workpiece 1 with the protective coating is first placed in a special fixture 2 .

[0054] The design of the fixture 2 must ensure that the workpiece 1 is firmly fixed while not hindering the exposure of the coating area 11 to ensure uniformity and consistency of the coating process. The selection of the fixture 2 should be optimized according to the shape, size and coating requirements of the workpiece 1 to ensure that it can provide sufficient support and stability to avoid displacement or deformation in a vacuum environment.

[0055] Next, the fixture 2 with the workpiece 1 to be processed is sent into the vacuum coating equipment, and the vacuum system is started to achieve the required high vacuum degree in the vacuum coating equipment. In the high vacuum environment, the coating material is vaporized and condensed into a uniform and dense film on the workpiece 1 to be processed. The vacuum environment helps to reduce the interference of gas molecules and ensure that the coating material is directly deposited on the coating area 11 of the workpiece 1 to be processed without being affected by air or other impurities, thereby obtaining a high-quality coating.

[0056] In some embodiments, the fixture 2 includes a slot 21 , the workpiece 1 to be processed is installed in the slot 21 , a through hole 22 is provided on the bottom wall of the slot 21 , and the coating area 11 is opposite to the through hole 22 .

[0057] During the vacuum evaporation process, the coating material vaporizes and flows from bottom to top. A through hole 22 is provided on the bottom wall of the slot 21 to ensure that the coating area 11 of the workpiece 1 is opposite to the through hole 22, so that during the vacuum coating process, the coating material can be directly deposited on the coating area 11 of the workpiece 1 through the through hole 22 without affecting the non-coating area 12.

[0058] The optical coating method of the embodiment of the present invention only needs to set corresponding through holes 22 on the fixture 2, and there is no need to use the fixture 2 to block the non-coated area 12. The processing accuracy requirement of the fixture 2 is low, thereby reducing the manufacturing cost.

[0059] like Figure 5 As shown, in some embodiments, S152 includes: S1521, coating the bottom surface of the workpiece 1; S1522, adjusting the position of the workpiece 1 to be processed until each surface of the workpiece 1 to be processed has completed the coating process.

[0060] After coating one surface of the workpiece 1, the workpiece 1 is rotated or flipped to the next surface to be coated according to the shape and coating requirements of the workpiece 1. Ensure that after each adjustment, the new coating area 11 of the workpiece 1 is aligned with the through hole 22 on the bottom wall of the slot 21 to ensure that the coating material can be evenly deposited.

[0061] In some embodiments, the tooling 3 includes a fixing member 32, and a groove 31 is provided on the fixing member 32, and the shape of the groove 31 is adapted to the shape of the workpiece 1 to be processed; The tool 3 includes a positioning member 33 , which is disposed on the fixing member 32 and surrounds the groove 31 .

[0062] The fixing member 32 is provided with a groove 31 that is completely adapted to the shape of the workpiece 1. The design of the groove 31 needs to take into account the specific geometric shape of the workpiece 1, such as round, square, irregular shape, etc., to ensure that the workpiece 1 can be tightly embedded and remain stable. The size of the groove 31 should be slightly larger than the actual size of the workpiece 1 to be processed, so as to facilitate installation and removal, while not affecting the firmness of the fixation.

[0063] The positioning member 33 is disposed around the groove 31 to further fix and accurately position the workpiece 1 to be processed, so as to apply paint to the non-coated area 12 of the workpiece 1 to avoid displacement or shaking during the coating process.

[0064] In other embodiments, the workpiece 1 to be processed has multiple placement postures, there are multiple types of tooling 3, and the groove 31 on each tooling 3 corresponds to a placement posture, so that the top surface of the workpiece 1 to be processed can always be flush with the top surface of the tooling 3.

[0065] For example, the workpiece 1 to be processed is a cube, having three groups of end faces arranged opposite to each other, and each group of end faces is arranged in a placement posture along the up-down direction, that is, the workpiece 1 to be processed has three placement postures.

[0066] Optionally, the coating is ink.

[0067] Optionally, a screen printer is used to print ink on the non-coated area 12 .

[0068] 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 they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An optical coating method, characterized in that: include: S1. Make a protective coating on the non-coated area of ​​the surface of the workpiece to be processed; S2, performing coating treatment on the coated area and at least part of the non-coated area of ​​the workpiece to be processed; S3, removing the protective coating in the non-coated area.

2. The optical coating method according to claim 1, characterized in that: The S1 includes: S11, fixing the workpiece to be processed on the tooling; S12, applying paint to the non-coating area; S13, adjusting the position of the workpiece to be processed, and repeating steps S11 to S12 until all non-coated areas on the workpiece to be processed are coated with paint.

3. The optical coating method according to claim 2, characterized in that: The S12 includes: S121, covering the top surface of the workpiece with a screen, wherein the screen has a transparent area and an isolation area, wherein the transparent area corresponds to the non-coated area, and the isolation area corresponds to the coated area; S122, applying paint on the silk screen.

4. The optical coating method according to claim 3, characterized in that: The S12 includes: S123, repeatedly brushing the material-permeable area on the screen with a scraper.

5. The optical coating method according to claim 2, characterized in that: The S1 includes: S14, baking the workpiece to be processed so that the coating forms the protective coating; S15, performing coating treatment on the workpiece to be processed with the protective coating.

6. The optical coating method according to claim 5, characterized in that: The baking temperature is 150 degrees to 250 degrees, and the baking time is 40 minutes to 50 minutes.

7. The optical coating method according to claim 5, characterized in that: The S15 includes: S151, placing the workpiece to be processed in a fixture; S152, performing vacuum coating treatment on the workpiece to be processed.

8. The optical coating method according to claim 7, characterized in that: The fixture comprises a slot, the workpiece to be processed is installed in the slot, a through hole is provided on the bottom wall of the slot, and the coating area is opposite to the through hole.

9. The optical coating method according to claim 8, characterized in that: The S152 includes: S1521, coating the bottom surface of the workpiece to be processed; S1522, adjusting the position of the workpiece to be processed until each surface of the workpiece to be processed has completed the coating process.

10. The optical coating method according to claim 3, characterized in that: The tooling includes a fixing piece, the fixing piece is provided with a groove, and the shape of the groove is adapted to the shape of the workpiece to be processed; The tooling includes a positioning piece, which is arranged on the fixing piece and surrounds the groove.

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