Molten metal injector system and method

Patent · Tue Apr 01 00:00:00 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.

• DOE Contract Number: 86X-SU545C
• 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

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