Hon Hai Precision Industry Co., Ltd.

Fih Co., Ltd.

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A method for treating a hinge holder includes the following steps: polishing a surface of the hinge holder; degreasing the hinge holder; cleaning the hinge holder; baking the hinge holder; cooling the hinge holder; screen-printing a part of the surface of the hinge holder; and plating the other part of the surface of the hinge holder with chromium or a chromium-containing compound. The plated hinge holder has a layer of chromium or chromium nitride on the surface, which renders the surface of the hinge holder more attractive and more wear-resistant. Therefore, it is not as easily scratched during assembly and frequent use.

Method and treating hinge holder

A method of manufacturing a decorative plate ( ) includes the steps of: preparing a metal substrate and covering selected areas ( ) of the substrate with a protective film; anodizing the substrate; and removing the protective film to expose metallic surfaces in the selected areas of the substrate.

Method of manufacturing decorative plate

A method of manufacturing a perforated metal cover ( ) includes steps of: step ( ), successively punching holes in a piece of metal sheet at a plurality of workstations and cutting the metal sheet into a plurality of metal bases; step ( ), stamping the metal bases into three dimensions; step ( ), grinding the metal bases; and step ( ), anodizing the metal bases to produce the finished covers. Each workstation includes at least one punch, and each punch includes a die having a plurality of punch heads, which number and arrangement are predetermined according to the holes ( ) to be formed in the perforated cover. Different arrays of holes are punched in the metal sheet in different punches.

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Tu-Chen, Taiwan

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