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Method for making casing of electronic device

A manufacturing method and technology for electronic devices, which can be applied to electrical equipment casings/cabinets/drawers, devices that coat surfaces with liquids, electrical components, etc. problem, to achieve the effect of strong corrosion resistance

Inactive Publication Date: 2003-05-21
HONG FU JIN PRECISION IND (SHENZHEN) CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, since the metal layer on the plastic workpiece is in direct contact with the external environment, it is easy to be in contact with dirt and be corroded.
At the same time, the metal layer produced by the above method has a single color and the decorative effect is not good.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

no. 1 example

[0017] The first embodiment: the above-mentioned polished shell is chemically degreased, then washed with water, then chemically treated, washed with water again, and then the above-mentioned treated shell is placed in a tank with an electrolyte and connected to a direct current processed in an electrolytic cell. In this embodiment, the above-mentioned electrolyte is a mixed solution of sulfuric acid and sulfosalicylic acid (Sulfosalicylic Acid), wherein the weight percent concentration of the sulfuric acid is 0.1-1%, and the weight of the sulfosalicylic acid (Sulfosalicylic Acid) is The percentage concentration is 10-20%. The above DC voltage is 40-80V, and the current density is 1-4A / dm 2 , the treatment time is 15 minutes to 1 hour, until a layer of colored oxide film with a thickness of 3-30 μm is formed on the surface of the shell. Finally, sealing treatment (Sealing Treatment) is performed on the shell with the oxide film on the surface.

no. 2 example

[0018] The second embodiment: degrease the above-mentioned polished casing, then wash it with water, then perform electrolysis or chemical polishing, and wash it with water again, then put the pretreated casing into a tank filled with electrolyte and pass through Anodizing is carried out in electrolytic cells with direct current. In this embodiment, the above electrolyte is sulfuric acid with a concentration of 150-20000 g / L. The above DC voltage is 12-20V, and the current density is 1-2A / dm 2 , the treatment time is 15 minutes to 1 hour, until the thickness of the oxide film reaches 3-30 μm. Finally, the shell with the oxide film on the surface is sealed.

[0019] Wherein in the second embodiment, the anodized casing can be colored before the sealing treatment so that the surface of the casing can obtain the desired color or pattern, wherein the coloring treatment can adopt the adsorption coloring method or the electrolytic coloring method for coloring.

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PUM

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Abstract

The present invention provides a method for manufacturing the casing of electronic device, including the following steps: (1) ejecting and forming the plastic casing having a specific shape; (2) forming a metalk coating on the surface of the plastic casing; (3) anodizing the plastic casing with the metal coating. In such a way, the casing of electronic devices has a metal sense and a strong erosion resistance. The method can continue the tinctoiral processing after the step (3) to acquire the required color or pattern.

Description

【Technical field】 [0001] The invention relates to a method for manufacturing an electronic device casing, in particular to a method for manufacturing an electronic device casing with better appearance and surface quality. 【Background technique】 [0002] At present, in order to obtain a metal texture for the plastic case of an electronic device, a metal layer is usually deposited on the surface of the plastic case through a plastic electroplating process. Related content can refer to US Patent No. 6,045,866. However, since plastic electroplating can only be plated on less active metals, such as copper and nickel, and more active metals, such as aluminum, are difficult to plate. In addition, due to the complex process of plastic electroplating itself, the production efficiency is low and the cost is high. [0003] To solve the above problems, US Patent No. 5,660,934 discloses a method for obtaining a metal layer on a plastic workpiece through a thermal spraying (Thermal Spra...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B05D3/00H05K5/00
Inventor 许哲源
Owner HONG FU JIN PRECISION IND (SHENZHEN) CO LTD
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