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Anodic oxidation process for manufacturing mirror pattern on surface of aluminum alloy

A technology of aluminum alloy surface and anodizing, which is used in surface polishing machine tools, manufacturing tools, metal processing equipment, etc., can solve the problems of LOGO logo area damage, long processing process, encroaching on the internal space of the product, etc., and achieve the effect of avoiding damage.

Pending Publication Date: 2022-06-28
HANGZHOU AMPHENOL PHOENIX TELECOM PARTS
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Problems solved by technology

[0005] After the first kind of masking, the LOGO logo pattern is processed by laser, and then the second anodic oxidation is performed. The disadvantage is that the surface of the LOGO logo area is damaged by the laser, and its roughness is Ra0.1, and there will be defects such as white spots on the surface. And the LOGO mark area of ​​the masking film is damaged by the high temperature of the laser, which will produce sawtooth defects
This process is currently only used in scenes that do not require high surface effects, such as surface fonts.
[0006] The second method is commonly used by mobile phone and laptop manufacturers. The LOGO area adopts the inlay method. The shell and LOGO are processed separately, and then inlaid and assembled. This method can obtain a perfect mirror effect in the LOGO area. Its disadvantages : The processing procedure is long and the cost is high; the shell thickness is increased, and the internal space of the product is occupied

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  • Anodic oxidation process for manufacturing mirror pattern on surface of aluminum alloy

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Embodiment Construction

[0028] In order to make those skilled in the art better understand the technical solutions of the present invention, the present invention is further described in detail below.

[0029] refer to figure 1 , the following takes the LOGO of making the mirror effect on the cover of the mobile phone as an example, and further describes the anodizing process of making the mirror pattern on the aluminum alloy surface provided by the present invention in detail, and its specific implementation is as follows:

[0030] S1: Use a mechanical polishing machine to polish the outer surface of the aluminum alloy mobile phone cover, including rough polishing, medium polishing, and fine polishing, so that the surface roughness reaches Ra0.01~Ra0.04;

[0031] S2: Masking film: The masking film is made of dry film photoresist, with a thickness of 30 μm to 50 μm, and is laminated and laminated using a drying film machine. The surface after filming should be free of wrinkles and air bubbles.

[00...

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Abstract

The invention provides an anodic oxidation process for manufacturing a mirror pattern on the surface of an aluminum alloy. The method comprises the following steps of: mechanically polishing the surface of the aluminum alloy to achieve a mirror surface effect, pressing a photosensitive dry film on the surface of the aluminum alloy, exposing and developing by using a film with a manufactured pattern, performing sand blasting treatment on the unshielded surface, performing primary anodic oxidation process on a product, removing a protective dry film, and performing secondary anodic oxidation treatment. The method is a brand-new anodic oxidation process, a perfect mirror surface effect can be achieved on the surface of the aluminum alloy, and various complex patterns can be achieved.

Description

technical field [0001] The invention relates to an anodic oxidation process on the surface of an aluminum alloy, in particular to an anodic oxidation process for making a mirror pattern on the surface of the aluminum alloy, and the pattern can be a LOGO. The aluminum alloy is generally an aluminum alloy plate, such as the casing of a mobile phone, a notebook computer, a Pad, a wearable device, and a vehicle-mounted device; or an aluminum alloy part of other shapes. [0002] technical background [0003] Aluminum alloy shell is a beautiful and durable material. It is widely used in notebook computers, mobile phones, tablet computers, wearables, vehicles and other fields. There are generally two factors that affect the appearance of mirror anodized aluminum plates. One is the anodization of the substrate. The former itself should be close to the mirror surface with low roughness, and the second is to control the porosity and oxide film thickness of the anodization. [0004] At...

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Application Information

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IPC IPC(8): C25D11/12C25D11/16B24C1/08B24B29/02
CPCC25D11/12C25D11/16B24C1/08B24B29/02
Inventor 吴丕军戴启亮
Owner HANGZHOU AMPHENOL PHOENIX TELECOM PARTS
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