Coating method for metal shell

Abstract

The invention provides a coating method for a metal shell. The coating method comprises the following steps that: providing a metal base plate; making a first coat on the surface of the metal base plate, and drying the first coat; carrying out silk-screen printing on the surface of the metal base plate with the first coat, forming a required decoration pattern, and drying; and after the silk-screen printing is carried out, coating the surface of the decoration pattern with a protection film. According to the coating method, specially-prepared ink is adopted, and various required delicate patterns are formed on the surface of the metal shell through a silk-screen printing technology. A printing pattern obtained by the technology is delicate and diversified, the ink has a certain tensile property since the ink is specially prepared, and after the pattern is formed on the surface of a metal, situations of falling, breakage and the like due to operations, including the stamping, the stretching and the like, of a metal product can be avoided, and the integrity of the pattern is effectively guaranteed. After long-term utilization, a good surface pattern effect still can be kept, and thefalling, the breakage and the like are avoided.

Description

technical field [0001] The invention relates to the field of electronic technology, in particular to a method for coating a metal shell. Background technique [0002] At present, in order to improve the aesthetic feeling of the terminal and attract more users, many manufacturers use stainless steel when manufacturing the shell of the terminal. In order to obtain a more delicate and smooth appearance effect, the general processing methods mainly include: Films with exquisite patterns, although various patterns can be obtained at will in this way, but the pasted patterns are easy to wear and fall off, the service life is short, and the metal texture is lacking; However, the types of patterns obtained by wire drawing and other processes are single, not environmentally friendly, and it is difficult to meet the diversified needs of customers; ③Through the surface printing process, more types, more exquisite, and stronger three-dimensional patterns can be obtained, and the pattern...

AI Technical Summary

Problems solved by technology

[0002] At present, in order to improve the aesthetic feeling of the terminal and attract more users, many manufacturers use stainless steel when manufacturing the shell of the terminal. In order to obtain a more delicate and smooth appearance effect, the general processing methods mainly include: Films with exquisite patterns, although various patterns can be obtained at will in this way, but the pasted patterns are easy to wear and fall off, the service life is short, and the metal texture is lacking; However, the types of patterns obtained by wire drawing and other processes are single, not environmentally friendly, and it is difficult to meet the diversified needs of customers; ③Through the surface printing process, more types, more exquisite, and stronger three-dimensional patterns can be obtained, and the patterns can be tactile , but there is no use of screen printing technology for the surface decoration of metal casings of electronic products, and the patterns obtained by the existing printing technology are easy to separate from the metal substrate during the casing forming process or use process, thus affecting the appearance of electronic products; ④ Another commonly used method is surface anodic treatment. This process is currently limited to wire drawing, sandblasting and other effects. It cannot get a good appearance decoration. The process is relatively complicated and there is a lot of pollution, and the production cost is high.