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Aluminum alloy shell and preparation method thereof

A technology of aluminum alloy and casing, which is applied in the field of aluminum alloy casing and its preparation, and can solve the problems of single decoration and single texture of mobile phone casings

Inactive Publication Date: 2017-07-07
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of single appearance decoration and single texture of the mobile phone casing in the prior art, the purpose of the present invention is to provide an aluminum alloy casing and a preparation method thereof. Convex and non-high gloss concave

Method used

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  • Aluminum alloy shell and preparation method thereof
  • Aluminum alloy shell and preparation method thereof

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preparation example Construction

[0028] According to the preparation method of the aluminum alloy shell of the present invention, in a preferred situation, different colors can be formed in the oxide film on the convex portion and the oxide film on the concave portion. By forming different colors in the oxide film of the convex part and the oxide film of the concave part, the aluminum alloy shell can have film layers of different colors.

[0029] According to the preparation method of the aluminum alloy shell of the present invention, the preparation method comprises in sequence:

[0030] Step a, performing the first anodic oxidation on the surface of the aluminum alloy shell substrate,

[0031] Step b, performing anti-etching protection on the surface of the aluminum alloy shell substrate to form a protective film,

[0032] Step d, forming a pattern layer on the surface of the aluminum alloy shell substrate with the protective film formed by etching,

[0033] Step e, performing a second anodic oxidation on...

Embodiment 1

[0054] This embodiment is used to illustrate the aluminum alloy shell of the present invention and its preparation method

[0055] A die-casting aluminum alloy back shell base material for a P8 mobile phone (purchased from BYD Co., Ltd.) was used as the aluminum alloy shell base material in this embodiment. At 50°C, the base material of the aluminum alloy shell was etched for 10s in an aqueous solution of sodium hydroxide with a concentration of 55g / L, and then washed twice with deionized water; then, at 15°C, in a concentration of 250ml / L After neutralizing in nitric acid for 10s, wash it twice with deionized water; then, at 90°C, polish it in a chemical polishing solution containing 650ml / L phosphoric acid and 350ml / L sulfuric acid for 10s, then wash it with deionized water for 2 times then, at 15°C, neutralize in 250ml / L nitric acid for 10s, and then wash twice with deionized water; Aluminum alloy shell base material.

[0056] An anodic film is formed on the surface of th...

Embodiment 2

[0067] This embodiment is used to illustrate the aluminum alloy shell of the present invention and its preparation method

[0068] A die-casting aluminum alloy back shell base material for a P8 mobile phone (purchased from BYD Co., Ltd.) was used as the aluminum alloy shell base material in this embodiment. At 70°C, the base material of the aluminum alloy shell was etched for 20s in an aqueous solution of sodium hydroxide with a concentration of 60g / L, and then washed twice with deionized water; then, at 20°C, at a concentration of 300ml / L After neutralizing in nitric acid for 20s, wash it twice with deionized water; then, at 93°C, polish it in a polishing solution containing 700ml / L phosphoric acid and 300ml / L sulfuric acid for 10s, then wash it with deionized water for 2 then, at 20°C, neutralize in 300ml / L nitric acid for 20s, and then wash twice with deionized water; Aluminum alloy shell base material.

[0069] An anodic film is formed on the surface of the aluminum allo...

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Abstract

The invention discloses an aluminum alloy shell. The outer surface of the aluminum alloy shell is provided with a convex portion and a concave portion, the convex portion is provided with a convex portion oxidation film, the concave portion is provided with a concave portion oxidation film, the lustrousness of the surface of the convex portion oxidation film is 90-150, and the lustrousness of the surface of the concave portion oxidation film is 5-25. The invention further discloses a preparation method of the aluminum alloy shell. The aluminum alloy shell has convex-concave three-dimensional texture and has the high-lustrousness convex surface and the low-lustrousness concave surface.

Description

technical field [0001] The invention relates to an aluminum alloy shell and a preparation method thereof. Background technique [0002] With the development of electronic technology, more and more electronic products appear in our lives, such as mobile phones, tablet computers, e-books, etc. Most of the shells of these electronic products use plastic shells. The requirements of the industry continue to increase, and more and more electronic products use metal casings. On the one hand, the metal casing has a better protective effect than the plastic casing, and on the other hand, its unique metal texture is also an important reason why the metal casing has attracted more and more attention. [0003] At present, the main purpose of surface treatment of metal casings of electronic products is decoration and protection. Among the existing surface treatment methods for metal casings, anodic oxidation, micro-arc oxidation and hard anodic oxidation All can achieve the above two e...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C25D11/12
CPCC25D11/12B44C1/227C25D11/18H04M1/0202C25D11/16C25D11/24C23F1/20C23F1/02C23F1/36C23F3/03C23G1/125C25D11/08C25D11/14
Inventor 熊雄廖重重章乐陈梁
Owner BYD CO LTD
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