Preparation process of middle frame and back plate shell of mobile phone

Abstract

The invention relates to the technical field of mobile phones, in particular to a preparation process of a middle frame and a back plate shell of a mobile phone. The preparation process includes the following steps that S1, extrusion forming is conducted on an alloy base material, and then the alloy base material is milled into the back plate shell of the required shape; S2, the middle frame of the required shape is made from the alloy base material through die-casting forming, punching forming or machining forming; S3, the middle frame formed in the step S2 and the shell formed in the step S1 are assembled together and welded into an assembly along peripheral bonding areas; S4, the assembly in the step S3 is placed in a mold to be subjected to injection molding, and an assembly subjected to injection molding is obtained; S5, the assembly subjected to injection molding in the step S4 is cut or milled into the required shape and size; and S6, anodic oxidation is conducted on the assembly which is cut or milled in the step S5 and subjected to injection molding so that the assembly can be in the required color. Compared with the prior art, the milling process is combined with the die-casting forming, punching forming or machining forming process through the welding process, the required finished product is then obtained through cutting or milling and anodic oxidation, the production efficiency is high, and the rate of defective products is low.

Description

technical field [0001] The invention relates to the technical field of mobile phones, in particular to a process for preparing a metal middle frame and a back panel shell of a mobile phone. Background technique [0002] The shells of electronic products such as high-end mobile phones and mobile power supplies are increasingly made of aluminum alloy. Surface treatment is anodized. After forming, the product is strong and durable, and the surface is beautiful and wear-resistant. At present, CNC machine tool milling, die-casting, milling + die-casting and other forming processes are mainly used, each of which has its own disadvantages. Among them, the milling of CNC machine tools has the following disadvantages: low processing efficiency, high cost, some dead angles, difficult cleaning, large capital investment in mass production equipment, and it is difficult to adopt second / third-line brand product shells in the current market; and the surface of die-casting materials Unsa...

AI Technical Summary

Problems solved by technology

Among them, the milling of CNC machine tools has the following disadvantages: low processing efficiency, high cost, some dead angles, difficult cleaning, large capital investment in mass production equipment, and it is difficult to adopt second / third-line brand product shells in the current market; and the surface of die-casting materials Unsatisfactory, mainly because the appearance has trachoma, flow lines, bright spots and other undesirable phenomena, the oxidation treatment technology is immature, and the yield rate is low; while milling + die-casting has high cost, large deformation, low production efficiency and yield rate, so it is not suitable Forming of large-area appearance products

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