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Method for manufacturing hard gold jewelry

A hard gold and jewelry technology, applied in jewelry, clothing, electrolysis process, etc.

Inactive Publication Date: 2010-09-15
PINO ALIPRANDINI HK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Parts made by this method are also relatively soft, so the method is generally limited to making non-worn trim pieces

Method used

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  • Method for manufacturing hard gold jewelry
  • Method for manufacturing hard gold jewelry
  • Method for manufacturing hard gold jewelry

Examples

Experimental program
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Embodiment Construction

[0032] In the accompanying drawings, the various steps of forming a hollow gold piece suitable for use in jewelry are schematically depicted. The method typically produces gold jewelry with a purity greater than 99.9% and a microhardness greater than 100 Hv.

[0033] through such as figure 1 The silicon rubber mold 11 shown is spin casted to produce the mandrel 10 of the low melting point alloy.

[0034] After casting, the mandrel 10 is placed in a drum to remove thorns or any parting lines. Additionally, grinding and polishing may also be required to smooth the surface of the mandrel.

[0035] As an alternative to low melting point alloys, wax can be used to form the mandrel. If wax is used, the wax should be removed before the mandrel is placed in the bath since the temperature of the bath is typically above the melting point of the wax.

[0036] The mandrel 10 is then attached to the clamp 20 of the plating rack. Such as figure 2 As shown, the mandrel 10 is cleaned i...

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Abstract

The invention relates to a method for forming hard gold jewelry, which comprises the steps of: forming a mandrel made of low-melt materials, electrically plating a gold layer on the mandrel, electrically plating a copper layer on the gold layer, forming a hole penetrating through the electrical plating layers to reach the mandrel, melting the mandrel and ensuring that the mandrel is charged from one or more holes.

Description

technical field [0001] This invention relates to the manufacture of gold jewellery. More particularly, the present invention relates to an electroforming process for the manufacture of 24 carat hard gold jewelry. Background technique [0002] Pure gold jewelry by casting is very soft, having a hardness value of only about 40Hv. Such soft gold jewelry can be easily damaged in use. [0003] Gold parts can also be formed by electroforming in a potassium gold cyanide bath. Parts made by this method are also relatively soft, and the method is therefore generally limited to making non-wearable trim pieces. Contents of the invention [0004] It is an object of the present invention to overcome or substantially ameliorate at least one of the above-mentioned disadvantages and / or more generally to provide an improved method of forming hard gold jewelry items suitable for everyday use. [0005] A method of forming hard gold jewelry is disclosed herein, comprising [0006] formin...

Claims

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Application Information

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IPC IPC(8): A44C27/00
CPCC25D5/12C25D5/48C25D1/08C25D1/02A44C27/00C25D5/10C25D3/48C25D5/611C25D5/627
Inventor 庄龙三
Owner PINO ALIPRANDINI HK
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