Gold electroforming technique

A technology of electroforming and gold, which is applied in the direction of electroforming and electrolysis, can solve the problems of low hardness and low yield, and achieve the effects of increased hardness, uniform and dense grains, and reduced impurity content

Inactive Publication Date: 2008-08-13
ZHONGSHAN FLASHLIGHT POLYTECHNIC +2
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  • Abstract
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  • Claims
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Problems solved by technology

[0004] The purpose of the present invention is to provide an electroforming machine that can effectively increase the hardness of gold handicrafts and double the yield of

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Embodiment Construction

[0019] Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

[0020] A process for electroforming gold, comprising the following steps;

[0021] A. Add 2 / 3 of the total volume of deionized water into the cleaned electroforming cylinder, then add the cylinder opening salt and cylinder opening agent; turn on the stirring device and the heating device;

[0022] B. Raise the liquid temperature of the electroforming cylinder to 40°C∽45°C; adjust the pH of the electroforming liquid with potassium hydroxide and phosphoric acid, and control the pH value of the liquid at 6.35∽6.85;

[0023] C. Add electroforming main salt potassium aurous cyanide and electroforming supplement to the electroforming cylinder to keep the gold content at 10-12g / L;

[0024] D. Hang the prepared casting coated with a conductive layer (which can be a conductive silver paste) as a cathode on a hanger and put it into an electroforming cyli...

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Abstract

The invention discloses a new process for electroforming gold, comprising the following steps: A. adding deionized water, make-up salt and make-up solution to a electroforming cylinder; B. heating liquid in the electroforming cylinder to 40 DEG C to 45 DEG C; adjusting the pH value of the liquid to 6.35 to 6.85; C. adding electroforming main salt potassium gold cyanide and electroforming replenisher to the electroforming cylinder, keeping the content of gold in a range from 10g/L to 12g/L; D. hanging a cast coated with conducting layer as a cathode on a hanging unit, and putting it into the electroforming cylinder; E adding hard gold replenisher, keeping the content of the replenisher in a range from 0.3g/L to 0.6g/L; and F. electrolyzing gold from plating solution under current function, and attaching the electrolyzed gold to the above cast. The invention aims to overcome low hardness, low yield of gold artwork manufactured by current electroforming gold process, and provide a electroforming gold process which can effectively increase hardness of gold artwork and improve yield of gold artwork by time.

Description

【Technical field】 [0001] The invention relates to a new electroforming gold process, in particular to an electroforming gold process capable of improving the hardness of gold handicraft products. 【Background technique】 [0002] The production technology of electroformed gold handicrafts is to use the principle of electrodeposition to transfer the gold ions in the electroforming solution of potassium aurous cyanide to the cathode mold coated with conductive silver paste under the action of electric field force, and then after treatment, Take off the mold core, so as to achieve the effect of precise reproduction. This technology has been widely used in metal and precious metal processing since the Russian scientist Jacobi copied relief crafts and jewelry by electroforming in 1838. In recent years, electroformed gold hollow handicrafts are more and more favored by consumers for their vivid fashion shapes combined with noble and elegant traditional styles. In particular, gold ...

Claims

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Application Information

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IPC IPC(8): C25D3/48C25D1/00
Inventor 陈静静蒋建平范义春
Owner ZHONGSHAN FLASHLIGHT POLYTECHNIC
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