Metal founding – Process – Shaping a forming surface
Patent
1996-12-02
1999-03-16
Ryan, Patrick
Metal founding
Process
Shaping a forming surface
164 35, B22C 702, B22D 1900
Patent
active
058817956
ABSTRACT:
A method of manufacturing gem decorated articles, typically jewelry, includes the steps of: using a first mold which has a mold cavity with one or more gem portions for receiving one or more gems and duplicates a model of the article; positioning one or more gems in the mold gem portion(s) of the mold; forming a temporary bond between the gem(s) and the mold gem portion(s) of the mold to maintain the gem(s) in place in the mold gem portion(s) during formation of a wax model including the gem(s); introducing a molten, hardenable wax material into the mold; cooling the wax material to form a wax model reproduction of the article with the gem(s) set therein; ending the temporary bond between the gem(s) and the mold gem portion(s) of the mold; removing the wax model with the set gem(s) from the mold; applying an investment material about the wax model with the set gem(s) and hardening the investment material to form a second mold; removing the wax material from the second mold; introducing a molten metal into the second mold; hardening the metal through cooling to form an article with the gem(s) preset therein; and removing the article from the second mold. If needed, insecurely set gems can be adhesively bonded to the wax model and wax projections can be used to facilitate the removal of the gems with the wax model from the first mold.
REFERENCES:
patent: 4154282 (1979-05-01), Kull
patent: 4392289 (1983-07-01), Michaud
patent: 5690477 (1997-11-01), Haimuff
Lin I.-H.
Lister John D.
Ryan Patrick
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