Metal founding – Process – Shaping a forming surface
Patent
1979-02-01
1981-01-27
Baldwin, Robert D.
Metal founding
Process
Shaping a forming surface
164 63, 164129, 164244, 164246, B22D 1806, B22D 2500
Patent
active
042469546
ABSTRACT:
A casting tree for preparing a tandem mold suitable for sequential casting, within the same casting flask, of both white and yellow gold portions of jewelry items has a base with a main stem extending upwardly from the base. In addition, a secondary stem is also provided and extends from the base to an upper portion of the main stem. Both stems are formed of a fusible material generally termed as "casting wax." Disposed through the central portion of the main stem, between the base and the upper portion to which the secondary stem extends, is a piece of non-fusible material, preferable a ceramic disc.
When the subject invention tree is used in an investment casting process, the casting mold formed thereby comprises a tandem mold divided by a non-fusible separator, each portion of the mold having a separate passage communicating therewith whereby two different types of material, for example, a white gold and yellow gold, can be separately cast using one flask.
REFERENCES:
patent: 726000 (1903-04-01), Slattery
patent: 3648760 (1972-03-01), Cooper
patent: 4161208 (1979-07-01), Cooper
Cohen Abraham M.
James Henry L.
Baldwin Robert D.
Wasko Gold Products Corp.
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