Molten metal injector system and method

Patent · Tue Apr 01 04:00:00 EST 2003

OSTI ID:875132

Meyer, Thomas N ^[1]; Kinosz, Michael J ^[2]; Bigler, Nicolas ^[3]; Arnaud, Guy ^[4]

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1. Murrysville, PA
2. Apollo, PA
3. Morin Heights, CA
4. Riviere-Beaudette, CA

Disclosed is a molten metal injector system including a holder furnace, a casting mold supported above the holder furnace, and a molten metal injector supported from a bottom side of the mold. The holder furnace contains a supply of molten metal having a metal oxide film surface. The bottom side of the mold faces the holder furnace. The mold defines a mold cavity for receiving the molten metal from the holder furnace. The injector projects into the holder furnace and is in fluid communication with the mold cavity. The injector includes a piston positioned within a piston cavity defined by a cylinder for pumping the molten metal upward from the holder furnace and injecting the molten metal into the mold cavity under pressure. The piston and cylinder are at least partially submerged in the molten metal when the holder furnace contains the molten metal. The cylinder further includes a molten metal intake for receiving the molten metal into the piston cavity. The molten metal intake is located below the metal oxide film surface of the molten metal when the holder furnace contains the molten metal. A method of injecting molten metal into a mold cavity of a casting mold is also disclosed.

• Assignee: Alcoa Inc. (Pittsburgh, PA)
• Patent Number(s): US 6540008
• Application Number: 09/609997
• OSTI ID: 875132
• Country of Publication: United States
• Language: English

Related Subjects

/164/
below
bottom
casting
cavity
communication
contains
cylinder
defined
defines
disclosed
film
fluid
fluid communication
furnace
holder
including
injecting
injector
intake
located
metal
metal oxide
method
mold
molten
molten metal
oxide
oxide film
partially
piston
positioned
pressure
projects
pumping
receiving
submerged
supply
supported
surface
upward