Post-processing technology of 3D highlight mobile phone rear cover

Abstract

The invention discloses a post-treatment processing technology of a 3D highlight mobile phone rear cover. The post-treatment processing technology comprises the following steps that S1, a polished part is obtained through grinding; S2, anodic oxidation; S3, shielding treatment; S4, CNC machining treatment is conducted; S5, removing the shielding ink; S6, carrying out NCVM or gold stamping; S7, nano paint spraying. According to the invention, primary surface oxidation treatment is carried out; the surface oxidation treatment enables the overall color of the outer surface of the mobile phone rear cover to be consistent all the time; according to the mobile phone rear cover, color difference cannot be generated, the whole surface of the mobile phone rear cover has a highlight visual effect, ahighlight metal layer is additionally electroplated on the surface treatment part in combination with an NCVM or gold stamping process, double highlight combination protection is achieved, more highlight surface colors and effects can be generated, and the service life of the highlight surface of the mobile phone rear cover is prolonged.

Description

technical field [0001] The invention relates to the technical field of mobile phone back covers, in particular to a post-processing process for a 3D bright mobile phone back cover. Background technique [0002] The existing mobile phone back cover can be divided into 2D mobile phone back cover or 3D mobile phone back cover according to the appearance. Among them, the mobile phone back cover made of aluminum alloy has the effects of good hand feeling, high strength and good brightness, and is very popular among young people. The molding process of the existing aluminum mobile phone back cover molding process is: forging → CNC processing → T processing → NMT injection molding → CNC processing → post-processing → radium engraving → inspection and assembly → shipment, where post-processing includes grinding and polishing processing, Oxygen treatment, CNC machining side hole treatment, high-brightness band processing and oxygen treatment. There is a difference in the color of th...

AI Technical Summary

Problems solved by technology

The molding process of the existing aluminum mobile phone back cover molding process is: forging → CNC processing → T processing → NMT injection molding → CNC processing → post-processing → radium engraving → inspection and assembly → shipment, where post-processing includes grinding and polishing processing, Oxygen treatment, CNC machining side hole treatment, high-brightness band processing and oxygen treatment. There is a difference in the color of the original one-oxygen surface at the non-highlight zone, so that the color of the overall back cover cannot be consistent. It is a common technical drawback of the existing aluminum alloy mobile phone back cover. Moreover, if the mobile phone back cover is treated with oxygen and then treated with a high-brightness band, it will cause film cracking on the oxygen surface. The probability of film cracking is 5 %, that is, the defect rate reaches about 5%. Finally, due to the existence of an oxygen surface, the burrs generated during side hole processing cannot be removed directly by sandpaper, and must be deburred by mechanically chamfering around the side hole , this deburring method will cause a certain gap between the side hole and the assembly, which is not beautiful, makes the installation of the assembly less firm, and is easy to cause dust to accumulate, and the height of the existing mobile phone back cover The bright effect and color are relatively simple, and generally after the highlight treatment, it is usually protected by a film. This protection method may cause the protective film to fall off, so that the highlight is exposed to the outside, which may cause the highlight surface to be scratched. , affecting the highlighting effect

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