B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
B22D 17/30 (2006.01) B22D 17/04 (2006.01) B22D 17/32 (2006.01) B22D 39/02 (2006.01)
Patent
CA 2082417
2082417 9117010 PCTABS00008 A valve mechanism for casting metal alloys with low melting temperatures provides two valves (22, 46) in a single assembly inside an alloy tank (10). The valves being in the tank reduces the formation of oxides which can occur in air and tends to reduce leaks . The apparatus comprises a tank (10) adapted to contain molten metal alloys, a cylinder (16) in the tank (10) having at its base a connection to an injection passageway (20) which leads through the tank (10) to a die (58) located outside the tank (10). A piston (18) reciprocates within the cylinder (16). Two valves (22, 46) are supplied in the passageway (20) in the tank (10) which allows molten metal alloy to be drawn into the cylinder (16) and forced through the passageway (52) to the die (58). A control system (86) for the piston (18) controls accurately the speed of piston (18) in the cylinder (16) when the molten metal alloy is fed to the die (58).
Kidd Thomas F.
Thompson Stephen A.
Electrovert Ltd.
Fetherstonhaugh & Co.
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