B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/183, 22/72
B22D 37/00 (2006.01) B22D 17/20 (2006.01) B22D 17/30 (2006.01) B22D 39/06 (2006.01)
Patent
CA 1313022
A METHOD OF RAPIDLY DISCHARGING A MOLTEN METAL, FROM ITS SUPPLY SYSTEM OF A PRESSURIZED HOLDING FURNACE ABSTRACT A method of rapidly discharging a molten metal from its supply system of a pressurized holding furnace having an open feeding chamber provided at one side of a pressure chamber with a suction pipe of a delivery pump, said pressure chamber having an inlet valve and an outlet valve for a pressure gas, in which the pressure chamber is pressurized to keep a constant level of the molten metal in the feeding chamber for maintaining a constant suction head of the delivery pump is disclosed, wherein the suction pipe is situated at a higher position than such a level of the molten metal in the feeding chamber that is lowered when a pressure in the pressure chamber is released while the supply system including the delivery pump is positioned upwardly above the suction pipe, and in that the outlet valve of the pressure chamber is opened when the molten metal is discharged from the supply system for allowing the molten metal to return into the pressure chamber, thereby rapidly lowering the metal level of the feeding chamber below the suction pipe for discharging the molten metal from the supply system into the holding furnace.
551323
Kubota Shoko
Yamada Sadayoshi
Ridout & Maybee Llp
Toshiba Machine Co. Ltd.
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