Treatments to Form Composite Surfaces

Abstract

The invention relates to a treatment method for forming a composite surface. The method comprises the following steps: providing a workpiece, wherein the workpiece is an aluminum-containing metal shell, and comprises an outer surface and an inner surface; carrying out a machine processing treatment on the workpiece; forming a fixation part on the inner surface of the workpiece, forming at least an electrode conduction hole on the fixation part, carrying out a primary anode treatment on the workpiece, forming an oxidation film with a first color on the surface of the workpiece, adopting the machine processing manner to remove part of the oxidation film on the fixation part, and removing part of the oxidation film on the outer surface of the workpiece; carrying out a secondary anode treatment on the workpiece, and forming an oxidation film with a second color on a position on the outer surface of the workpiece, wherein the oxidation film is removed from the position on the outer surface of the workpiece; and removing the fixation part. With the treatment method, a surface of a metal workpiece can obtain oxidation films with different colors.

Description

technical field [0001] The invention relates to a treatment method for forming a composite surface, in particular to a method for forming various colors or surface effects on the surface of a workpiece by utilizing multiple anodic treatment processes. Background technique [0002] Nowadays, portable electronic products are very popular, such as mobile phones, personal digital assistants, computers and so on. Consumers are paying more and more attention to their appearance, so the housings of various electronic products usually have bright surfaces, especially metal surfaces, which are usually treated with various processing methods to make them have an attractive smooth surface and gloss. [0003] For coloring the surface of the casing, currently known techniques include the method of using anodic oxidation to produce color on the metal surface. This method is limited to a single color and cannot produce color changes. [0004] At present, the anodic treatment process is u...

AI Technical Summary

Problems solved by technology

In order to solve the problem of electrification in the second anodic oxidation, a feasible way is to grind the inner surface of the shell to allow the electrodes to conduct electricity. The oxide film is not completely removed, which will easily affect the conductivity, and then affect the effect of the second anodic oxidation

In addition, if you want to make a third color, you need to grind the inner surface of the shell again, which increases the chance of damaging the shell

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