Mobile phone and manufacturing method of surface decorative layer of appearance piece thereof

Abstract

The invention discloses a mobile phone and a manufacturing method of a surface decorative layer of an appearance piece thereof. The manufacturing method comprises the following steps of: applying a priming paint layer on the surface of the appearance piece of the mobile phone; making a metal coating with needed pattern on the surface of the priming paint; applying a middle paint layer on the surface of the metal coating and the surface of the priming paint at the periphery of the metal coating; and applying a finish layer on the surface of the middle paint. With the PPVD (Patterned Physical Vapor Deposition) technology, the NCVM (Non-conductive Vacuum Metallization), the screen printing film and the spraying technology are combined together, the manufactured decorative layer has stereo decorative effects with high metallic characteristics, the grade of the products is improved, and the decorative layer is free from limitation of the shape of products and can be manufactured on the surface of a curve appearance piece; in comparison with gold stamping, the manufacturing method can manufacture the complex patterns which have thin lines and are not prone to fracture, and the metal layer cannot be corrugated, cannot bubble and has strong adhesive force; in comparison with the laser etching, the decorative layer manufactured by the manufacturing method has no carving trail, and provides no handfeel when being touched; and moreover, the equipment cost is low, and the production efficiency is high.

Description

technical field [0001] The invention relates to the field of manufacturing technology of surface decoration layers of appearance parts such as mobile phones and their front shells, middle shells, back shells or battery covers. A mobile phone with a high metallic three-dimensional decoration effect and a method for making a surface decoration layer of its exterior parts. Background technique [0002] With the popularization of smart phones in the past two years, especially the emergence of tablet smart phones, the number of appearance parts of mobile phones has been greatly reduced, from the previous 6-9 parts to 2-3 parts, and the area of ​​the front shell It has also become very small, and only the battery cover part is still a large-area plane, so it is no longer possible to make various surface processing techniques like the previous mobile phone appearance parts. [0003] In the past surface processing technology of mobile phone appearance parts, spraying, NCVM (Non-con...

AI Technical Summary

Problems solved by technology

[0002] With the popularization of smart phones in the past two years, especially the emergence of tablet smart phones, the number of appearance parts of mobile phones has been greatly reduced, from the previous 6-9 parts to 2-3 parts, and the area of ​​the front shell It has also become very small, only the battery cover part is still a large area of ​​the plane, so it is no longer possible to make various surface processing techniques like the previous mobile phone appearance parts

[0003] In the past surface processing technology of mobile phone appearance parts, spraying, NCVM (Non-conductive Vacuum Metallization, non-conductive vacuum plating) and silk screen printing technology are all independent processes, and it is impossible to make a specific LOGO or pattern with a high metal feeling three-dimensional When the appearance of the decorative effect comes out, the traditional process generally uses the process of hot stamping or laser engraving after NCVM to realize the production of metal patterns, but these two processes have the following shortcomings:

[0004] 1. It is impossible to make large-area metal patterns with the hot stamping process, and it is easy to wrinkle and blister after hot stamping, and the metal feeling is not strong; the adhesion test cannot be guaranteed

[0005] 2. It is impossible to make complex patterns with thin lines, and it is easy to cause problems such as broken lines during the bronzing process

[0006] 3. The laser engraving process has a greater selectivity for materials, and light-colored materials cannot be engraved cleanly, and radium engraving marks are easy to appear after laser engraving, and there is a hand feeling

[0007] 4. The speed of laser engraving is slow and the production efficiency is low; and the cost of laser engraving equipment is high, resulting in high production costs, and it is impossible to make products with low cost and high requirements for existing customers

[0008] 5. The laser engraving process cannot make patterns on workpieces with curved surfaces. Because the energy of laser engraving on the curved surfaces is different, the thickness of the lines and the clarity of the patterns will also change.

[0009] Therefore, prior art still needs to improve and develop

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