Process for producing case or accessories of precious metal wristwatch

A production process and precious metal technology, applied in the direction of electrolysis, electroforming, etc., can solve the problems of unsatisfactory dimensional accuracy, watch case manufacturing, etc.
CN104499008AActive Publication Date: 2015-04-08吉林鼎辉电子科技有限公司
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Patent Information

Authority / Receiving Office
CN · China
Current Assignee / Owner
吉林鼎辉电子科技有限公司
Publication Date
2015-04-08

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Abstract

The invention relates to a process for producing a case or accessories of a precious metal wristwatch. The method is characterized by comprising the following steps: firstly preparing a zinc alloy into a mold block in a die-casting manner, and finishing a die casting so as to ensure that the assembly size and surface roughness reach the requirements; sequentially carrying out electro-coppering and electro gilding, namely, electrochemical hardening gold, on the mold block; in order to enable parts to reach hard pure gold, removing the zinc alloy and copper inside the parts which comprises the following steps: drilling the parts subjected to electro-coppering and precious metal electroplating, by adding hydrochloric acid inside drilled blow-off holes and heating to a boiling point, carrying out chemical reaction and melting, dissolving the all zinc alloy in hydrochloric acid and flowing out, also dissolving a part of the copper in hydrochloric acid and flowing out; cleaning with clean water; by introducing sulfuric acid and heating to a boiling point, carrying out chemical reaction and melting, completely dissolving the copper electroplating layer in sulfuric acid and flowing out to obtain hard pure gold parts; and cleaning the parts with clean water to obtain hollow case or accessories of the precious metal wristwatch. The hollow parts prepared by the method, which is disclosed by the invention, has good size accuracy and appearance surface which can reach the desired degree of finish.
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Description

technical field

[0001] The invention relates to a production process of a precious metal watch case or decoration. Background technique

[0002] At present, the watch cases appearing on the market have solid structures, and the cases cannot be made of high-purity gold, generally 18K gold; some hollow gold ornaments on the market, the hollow part is made of wax mold or low melting point Bismuth-tin alloy is used to make molds, which are manufactured by electroforming. This approach can meet the production of general decorative parts, but it cannot meet the production of parts with high dimensional accuracy requirements, such as watch cases or other decorative parts with high assembly requirements. At the same time, wax molds or bismuth-tin alloy molds are made by pouring, and their surfaces are relatively rough, and the surface of gold electroforming is correspondingly rough. Contents of the invention

[0003] The present invention makes improvements to the above-ment...

Claims

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