Extinction treatment method for metal part

Abstract

The invention provides a matting treatment method for a metal part. The matting treatment method comprises the following steps: (1) mixing matting ink, a curing agent and a diluent in proportion to obtain a matting coating; (2) a matting coating is sprayed on the surface of the metal part, and a semi-finished product part is obtained; and (3) the semi-finished product part is baked, and the extinction metal part is obtained. According to the delustering treatment method, the delustering coating capable of absorbing and reducing scattered light on the surface of the component is prepared, and a proper delustering process is matched, so that stray light on the surface of the metal component meets the dazzle light requirement of ISO 9538.

Description

Technical Field

[0001] The invention belongs to the technical field of matte coatings and relates to a matte treatment method for metal parts. Background Art

[0002] Optical lenses play an increasingly important role in our daily lives, such as mobile phone lenses, camera lenses, surveillance lenses or vehicle-mounted lenses. The stability of optical lenses during use directly affects the user's use effect. In particular, in the automotive field, with the rapid development of the automotive industry, cars, as a means of travel, their safety performance is closely related to the personal safety of drivers and other passengers. As the eyes of the car, the images and video information obtained by the vehicle-mounted optical lens directly affect the observation effect of the passengers or the internal system of the vehicle on external objects. The imaging clarity of the lens directly affects the safety of the vehicle and the driver.

[0003] The internal parts of automotive lenses are generally metal parts, including metal lens barrels and metal spacers, because the imaging environment and lighting environment of automotive lenses are relatively complex. For example, in a backlit environment, it is necessary to face the sunlight for imaging, and there are also headlights or street lights, signal lights, and various car lights at various positions in the camera's field of view. When a relatively flat beam of light hits two end positions, due to the problem of front and rear optical path difference, optical diffraction will occur on the metal parts. If the stray light generated by optical diffraction converges toward the same position, a wavy stray light will be generated after imaging. Due to the wave nature of light, when the light is incident on the edge of the aperture, the propagation direction of the light deviates from the straight line propagation in geometric optics. When a beam of light hits the aperture of the diaphragm and the spacer in the optical lens at the same time, it will cause diffraction of the light and produce wavy stray light. This wavy stray light is reflected in the imaging chip, which seriously affects the imaging quality of the lens. Therefore, it is necessary to solve the problem of stray light dispersion of metal parts.

[0004] CN113126280A discloses a lens, a lens assembly, a camera module, an electronic device and a lens manufacturing method. The lens comprises a shading member and a lens body capable of transmitting light, wherein the shading member is arranged around the outer side of the side edge of the lens body and can absorb light.

[0005] CN221171904U discloses a light-emitting assembly, a light-emitting device and a vehicle. The light-emitting assembly includes a housing, a light source, a reflector, a digital micromirror device and a lens. The housing has an inner cavity. The light source, the reflector, the digital micromirror device and the lens are all installed in the housing and face the inner cavity. The light source is used to emit light to the inner cavity. The reflector is used to reflect the light to the digital micromirror device. The digital micromirror device is used to selectively reflect the light reflected by the reflector to the lens. At least part of the cavity wall of the inner cavity is provided with an extinction structure, which includes at least one protrusion. At least one beam of light propagating in the inner cavity is reflected by the extinction structure and staggered from the light entrance area of ​​the lens.

[0006] The above solution changes the structure of the light-emitting component or the form of spray painting to achieve the matting of the metal parts, but the matting effect is not ideal and it is difficult to meet the glare requirements of ISO 9538. Summary of the invention

[0007] The purpose of the present invention is to provide a matte treatment method for metal parts. The matte treatment method of the present invention is to prepare a matte coating that can absorb and reduce scattered light on the surface of the part, and match it with a suitable matte process, so that the surface stray light of the metal part meets the glare requirements of ISO 9538.

[0008] In order to achieve the purpose of the invention, the present invention adopts the following technical solutions:

[0009] In a first aspect, the present invention provides a method for matting a metal part, the method comprising the following steps:

[0010] (1) After mixing the matte ink and the curing agent, a diluent is added to obtain a matte coating;

[0011] (2) spraying a matte coating on the surface of a metal part to obtain a semi-finished part;

[0012] (3) The semi-finished parts are subjected to baking treatment to obtain matte metal parts.

[0013] After the matte coating of the present invention is prepared, it can be stored under refrigeration conditions, and before the next use, it can be stirred until there is no precipitation.

[0014] The present invention uses matte ink, a curing agent and a diluent to mix to form a matte coating, which is suitable for matting metal parts. With a suitable matte treatment process, the reflectivity of the metal parts can be reduced to meet the glare requirements of ISO 9538.

[0015] Preferably, the matte ink in step (1) includes UBK-11 matte ink and / or UBK-19 matte ink.

[0016] Preferably, the curing agent in step (1) includes UBK-11 curing agent and / or UBK-19 curing agent.

[0017] Preferably, the diluent in step (1) comprises UBK-11 diluent and / or UBK-19 diluent.

[0018] Preferably, the mass ratio of the matte ink and the curing agent in step (1) is (10-20):(1-2), for example: 10:1, 11:1, 16:1.5, 18:1.8 or 20:2, etc., and is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0019] Preferably, the total mass ratio of the matte ink and curing agent to the diluent in step (1) is (10-20):(8-12), for example: 10:8, 11:10, 16:8, 18:10 or 20:12, etc., and is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0020] Preferably, during the spraying in step (2), the distance between the matte coating and the metal part is 20 cm to 30 cm, for example, 20 cm, 22 cm, 25 cm, 28 cm or 30 cm, etc., not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0021] Preferably, the spraying pressure in step (2) is 400 kPa to 500 kPa, for example, 400 kPa, 420 kPa, 450 kPa, 480 kPa or 500 kPa, etc., and is not limited to the listed values, and other unlisted values ​​within the numerical range are also applicable.

[0022] Preferably, after spraying in step (2), the coating is allowed to stand for 20 to 30 minutes, for example, 20 minutes, 22 minutes, 25 minutes, 28 minutes or 30 minutes, etc., but not limited to the listed values, other values ​​not listed within the numerical range are also applicable.

[0023] Preferably, step (2) is repeated 2 to 5 times, for example, 2 times, 3 times, 4 times or 5 times, etc., and is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0024] Preferably, the baking temperature in step (3) is 90°C to 120°C, for example, 90°C, 95°C, 100°C, 105°C, 110°C or 120°C, etc., and is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0025] Preferably, the baking time is 0.5 h to 2 h, for example, 0.5 h, 0.8 h, 1 h, 1.5 h or 2 h, etc., and is not limited to the listed values, and other values ​​not listed within the numerical range are also applicable.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) Compared with the conventional matting methods such as spray paint anode, the inkjet matting method used in the present invention can significantly reduce the reflectivity of metal parts, with low matting cost, simple operation and obvious effect.

[0028] (2) When the matte treatment method of the present invention is used to spray metal parts, the reflectivity at the spraying position can reach below 1%. By adjusting the configuration of various materials in the spray coating, the reflectivity at the spraying position can reach below 0.18%, so that the product meets the glare requirements of ISO 9538. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a graph showing changes in the measured reflectivity of metal parts in the matte treatment method described in Example 1 of the present invention.

[0030] Figure 2 This is a reflection effect diagram of a metal component before matte treatment according to Example 1 of the present invention.

[0031] Figure 3 This is a reflection effect diagram of a metal component after matte treatment according to Example 1 of the present invention.

[0032] Figure 4 It is a comparison chart of the reflectivity of the metal parts after matting obtained in Example 1 of the present invention and Comparative Examples 1-2. DETAILED DESCRIPTION

[0033] The technical solution of the present invention is further described below by specific implementation methods. It should be understood by those skilled in the art that the embodiments are only to help understand the present invention and should not be regarded as specific limitations of the present invention.

[0034] The UBK-19 matte ink, UBK-19 curing agent, UBK-19 diluent, UBK-11 matte ink, UBK-11 curing agent, and UBK-11 diluent used in the examples and comparative examples of the present invention are all purchased from Qingdao Pannuo New Materials Co., Ltd.

[0035] The spraying process of the present invention needs to be carried out under the condition of air circulation to avoid poisoning, and the metal component material used is aluminum.

[0036] Example 1

[0037] This embodiment provides a matte treatment method for a metal component, the matte treatment method comprising the following steps:

[0038] (1) Mix 11 g of UBK-19 matte ink and 1 g of UBK-19 curing agent, stir evenly, add 10 g of UBK-19 diluent, and stir evenly to obtain a matte coating;

[0039] (2) Spray the matte coating evenly on the surface of the metal part at a distance of 25 cm from the metal part, let it stand for 25 minutes after spraying, and repeat the above steps 3 times to obtain a semi-finished part;

[0040] (3) Dry the semi-finished parts at 120°C for 0.6 h to obtain matte metal parts.

[0041] Among them, in the said extinction treatment method, the measured value change of the reflectivity of the metal parts is as follows Figure 1 As shown in the figure, the reflection effect of the metal parts before matte is as follows Figure 2 As shown in the figure, the reflection effect of the metal parts after matting is as follows Figure 3 shown.

[0042] Example 2

[0043] This embodiment provides a matte treatment method for a metal component, the matte treatment method comprising the following steps:

[0044] (1) 16 g of UBK-11 matte ink and 1.5 g of UBK-11 curing agent were mixed, and after stirring evenly, 8 g of UBK-11 diluent was added and stirred evenly to obtain a matte coating;

[0045] (2) Spray the matte coating evenly on the surface of the metal part at a distance of 30 cm from the metal part, let it stand for 30 minutes after spraying, and repeat the above steps 3 times to obtain a semi-finished part;

[0046] (3) Dry the semi-finished parts at 90°C for 1.5 hours to obtain matte metal parts.

[0047] Example 3

[0048] This embodiment provides a matte treatment method for a metal component, the matte treatment method comprising the following steps:

[0049] (1) Mix 20 g of UBK-19 matte ink and 2 g of UBK-19 curing agent, stir evenly, add 12 g of UBK-19 diluent, and stir evenly to obtain a matte coating;

[0050] (2) Spray the matte coating evenly on the surface of the metal part at a distance of 20 cm from the metal part, let it stand for 28 minutes after spraying, and repeat the above steps 3 times to obtain a semi-finished part;

[0051] (3) Dry the semi-finished parts at 100°C for 1.2 hours to obtain matte metal parts.

[0052] Example 4

[0053] This embodiment provides a matte treatment method for a metal component, the matte treatment method comprising the following steps:

[0054] (1) Mix 25 g of UBK-19 matte ink and 1 g of UBK-19 curing agent, stir evenly, add 10 g of UBK-19 diluent, and stir evenly to obtain a matte coating;

[0055] (2) Spray the matte coating evenly on the surface of the metal part at a distance of 25 cm from the metal part, let it stand for 25 minutes after spraying, and repeat the above steps 3 times to obtain a semi-finished part;

[0056] (3) Dry the semi-finished parts at 120°C for 0.6 h to obtain matte metal parts.

[0057] Example 5

[0058] This embodiment provides a matte treatment method for a metal component, the matte treatment method comprising the following steps:

[0059] (1) Mix 4 g of UBK-19 matte ink and 1 g of UBK-19 curing agent, stir evenly, add 10 g of UBK-19 diluent, and stir evenly to obtain a matte coating;

[0060] (2) Spray the matte coating evenly on the surface of the metal part at a distance of 25 cm from the metal part, let it stand for 25 minutes after spraying, and repeat the above steps 3 times to obtain a semi-finished part;

[0061] (3) Dry the semi-finished parts at 120°C for 0.6 h to obtain matte metal parts.

[0062] Example 6

[0063] This embodiment provides a matte treatment method for a metal component, the matte treatment method comprising the following steps:

[0064] (1) After 11 g of UBK-19 matte ink is stirred evenly, 10 g of UBK-19 diluent is added and stirred evenly to obtain a matte coating;

[0065] (2) Spray the matte coating evenly on the surface of the metal part at a distance of 25 cm from the metal part, let it stand for 25 minutes after spraying, and repeat the above steps 3 times to obtain a semi-finished part;

[0066] (3) Dry the semi-finished parts at 120°C for 0.6 h to obtain matte metal parts.

[0067] Example 7

[0068] This embodiment provides a matte treatment method for a metal component, the matte treatment method comprising the following steps:

[0069] (1) Mix 11 g of UBK-19 matte ink and 3 g of UBK-19 curing agent, stir evenly, add 10 g of UBK-19 diluent, and stir evenly to obtain a matte coating;

[0070] (2) Spray the matte coating evenly on the surface of the metal part at a distance of 25 cm from the metal part, let it stand for 25 minutes after spraying, and repeat the above steps 3 times to obtain a semi-finished part;

[0071] (3) Dry the semi-finished parts at 120°C for 0.6 h to obtain matte metal parts.

[0072] Example 8

[0073] This embodiment provides a matte treatment method for a metal component, the matte treatment method comprising the following steps:

[0074] (1) Mix 11 g of UBK-19 matte ink and 1 g of UBK-19 curing agent, stir evenly, then add 5 g of UBK-19 diluent, stir evenly to obtain a matte coating;

[0075] (2) Spray the matte coating evenly on the surface of the metal part at a distance of 25 cm from the metal part, let it stand for 25 minutes after spraying, and repeat the above steps 3 times to obtain a semi-finished part;

[0076] (3) Dry the semi-finished parts at 120°C for 0.6 h to obtain matte metal parts.

[0077] Example 9

[0078] This embodiment provides a matte treatment method for a metal component, the matte treatment method comprising the following steps:

[0079] (1) Mix 11 g of UBK-19 matte ink and 1 g of UBK-19 curing agent, stir evenly, add 20 g of UBK-19 diluent, and stir evenly to obtain a matte coating;

[0080] (2) Spray the matte coating evenly on the surface of the metal part at a distance of 25 cm from the metal part, let it stand for 25 minutes after spraying, and repeat the above steps 3 times to obtain a semi-finished part;

[0081] (3) Dry the semi-finished parts at 120°C for 0.6 h to obtain matte metal parts.

[0082] Comparative Example 1

[0083] In the conventional metal parts spray painting process of this comparative example, the matte paint is sprayed on the metal surface by compressed air, and then heated at 180° C. to solidify it into a film.

[0084] Comparative Example 2

[0085] In this comparative example, a conventional metal part anodizing process is performed, wherein the metal part is placed in an electrolyte (5% phosphoric acid (H3PO4), 0.08 mol / L oxalic acid (H2C2O4), 0.8 mmol / L cerium sulfate (Ce(SO4)2)), and an oxide film is formed on the metal surface by applying an external current;

[0086] Among them, electrolyte.

[0087] Performance Test:

[0088] The reflectivity of the metal parts spraying position was measured using a spectrometer. The test results are shown in Table 1:

[0089] Table 1

[0090] Component reflectivity in the wavelength range of 400-680nm Example 1 0.15％ Example 2 0.18％ Example 3 0.17％ Example 4 0.65％ Example 5 0.23％ Example 6 1％ Example 7 0.48％ Example 8 0.67％ Example 9 0.28％ Comparative Example 1 0.62％ Comparative Example 2 1.5％

[0091] As can be seen from Table 1, from Examples 1-9, when the matte treatment method of the present invention is used to spray metal parts, the reflectivity at the spraying position can reach below 1%, and by adjusting the configuration of various materials in the spray coating, the reflectivity at the spraying position can reach below 0.18%.

[0092] By comparing Example 1 with Examples 4-5, it can be seen that in the matte treatment method for metal parts of the present invention, the amount of matte ink added will affect the effect. When the total mass of the matte ink and the curing agent and the mass ratio of the diluent are controlled at (10-20): (8-12), the matte effect of the metal parts is better. If the amount of matte ink added is too high, the coating is too concentrated, resulting in poor spraying effect; if the amount of matte ink added is too low, it is effective but not optimal.

[0093] By comparing Example 1 with Examples 6-7, it can be seen that in the matte treatment method for metal parts of the present invention, the amount of curing agent added will affect the effect. When the total mass of the matte ink and the curing agent and the mass ratio of the diluent are controlled at (10-20): (8-12), the matte effect of the metal parts is better. If the amount of curing agent added is too low, the adhesion performance of the coating decreases and the effect is seriously reduced; if the amount of curing agent added is too high, the coating is too concentrated, resulting in poor spraying effect.

[0094] By comparing Example 1 with Examples 8-9, it can be seen that in the matte treatment method for metal parts of the present invention, the amount of curing agent added will affect the effect. When the total mass of the matte ink and the curing agent and the mass ratio of the diluent are controlled at (10-20): (8-12), the matte effect of the metal parts is better. If the amount of diluent added is too low, the coating is too concentrated, resulting in poor spraying effect; if the amount of diluent added is too high, the coating is too thin, resulting in an effective but not optimal state.

[0095] The comparison of the reflectivity of the metal parts after matting obtained in Example 1 and Comparative Example 1 compared with the metal parts treated with anodizing (Comparative Example 2) is shown in the figure below: Figure 4 As shown, by comparing Example 1 with Comparative Examples 1-2, it can be obtained that after the matting treatment described in the present invention, the reflectivity of the metal parts is significantly improved compared with the metal parts subjected to the existing anode matting and paint matting treatments. The matting effect of the matting treatment process of the present invention on the metal parts is far superior to the existing process treatment methods, and the stray light performance is significantly improved.

[0096] The applicant declares that the above is only a specific implementation mode of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present invention are within the protection scope and disclosure scope of the present invention.

Claims

1. A method for matting a metal part, characterized in that: The method for the extinction treatment comprises the following steps: (1) After mixing the matte ink and the curing agent, a diluent is added to obtain a matte coating; (2) spraying a matte coating on the surface of a metal part to obtain a semi-finished part; (3) The semi-finished parts are subjected to baking treatment to obtain matte metal parts.

2. The matting treatment method according to claim 1, characterized in that: The matte ink in step (1) includes UBK-11 matte ink and / or UBK-19 matte ink.

3. The matting treatment method according to claim 1 or 2, characterized in that: The curing agent in step (1) includes UBK-11 curing agent and / or UBK-19 curing agent.

4. The matting treatment method according to any one of claims 1 to 3, characterized in that: The diluent in step (1) includes UBK-11 diluent and / or UBK-19 diluent.

5. The matting treatment method according to any one of claims 1 to 4, characterized in that: The mass ratio of the matte ink and the curing agent in step (1) is (10-20):(1-2); Preferably, the mass ratio of the total mass of the matte ink and the curing agent to the mass ratio of the diluent is (10-20):(8-12).

6. The matting treatment method according to any one of claims 1 to 5, characterized in that: During the spraying in step (2), the distance between the matte coating and the metal parts is 20 cm to 30 cm.

7. The matting treatment method according to any one of claims 1 to 6, characterized in that: The spraying pressure in step (2) is 400 kPa to 500 kPa.

8. The matting treatment method according to any one of claims 1 to 7, characterized in that: After the spraying in step (2), the mixture is allowed to stand for 20 to 30 minutes.

9. The matting treatment method according to any one of claims 1 to 8, characterized in that: Repeat step (2) 2 to 5 times.

10. The matting treatment method according to any one of claims 1 to 9, characterized in that: The baking temperature in step (3) is 90° C. to 120° C. Preferably, the baking time is 0.5h to 2h.

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