B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/188, 22/64
B22D 13/00 (2006.01) B22D 13/02 (2006.01) B22D 13/10 (2006.01) B22D 21/00 (2006.01) B22D 27/18 (2006.01)
Patent
CA 2004061
The present invention relates to a process for spin casting copper, copper alloys or other alloys that are sensitive to oxygen, in particular bronze, whereby at least one additive is introduced in order to reduce or avoid the oxide layer that forms on the inner surface of the casting in the casting mould. The present invention provides that solid and preferably powdered borax, optionally in conjunction with finely divided mechanical mixtures of metals such as Mg, Li, Cer which have an affinity for oxygen and/or graphite and/or fire clay and/or charcoal are applied directly after the casting process to the in particular still liquid inside surface of the casting, at a coating thickness of 0.5 to 4 mm, preferably 1 to 3 mm.
Brugger Gottfried
Marks & Clerk
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