B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1120
B29C 70/58 (2006.01) A44C 27/00 (2006.01) B22F 3/22 (2006.01) B29C 45/00 (2006.01) B30B 11/00 (2006.01) C22C 32/00 (2006.01)
Patent
CA 1116369
ABSTRACT OF THE DISCLOSURE A method is provided for producing a metallic article. The method includes forming a mixture of metallic particles selected from the group consisting of platinum group metals, gold, silver and base metals, the metallic particles having a size falling within the range 1/2 to 50 microns, and particles of a thermoplastic material; placing the mixture in a mold; molding the mixture under pressure and at an elevated tempera- ture; and removing the metallic article from the mold. This method is a distinct improvement over the "lost-wax" process in that a separate casting mold is not required for each of the individual article products. It is particularly adaptable for the fabrication of "cheap" items of jewellery, e.g., medallions, which are required to have a pleasing appearance but little intrinsic value.
303257
Chase Barry J.
Rushforth Roy W.e.
Selman Gordon L.
Johnson Matthey & Co.
Marcus & Associates
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