Countergravity casting apparatus and desulfurization methods
AssigneeRtx Corporation
InventorsJohn J. Marcin, Jr., Alan D. Cetel, Mario P. Bochiechio, Reade R. Clemens
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Abstract
An apparatus for countergravity casting a metallic material, has: a crucible for holding melted metallic material; a casting chamber for containing a mold; a fill tube capable of extending into the crucible to communicate melted metallic material to the casting chamber; and a gas source coupled to a headspace of the melting vessel to allow the gas source to pressurize the headspace to establish a pressure differential to force the melted metallic material upwardly through the fill tube into the mold. Extraneous sulfur is prevented from entering the molten metal from the surrounding environment.
Claims20
A countergravity casting apparatus comprising:
- a melting crucible;
- a casting mold;
- a flowpath from the melting crucible to the casting mold;
- and
- CaO particles positioned to prevent extraneous sulfur from entering molten metal from a surrounding environment, the CaO particles exposed to a headspace of the melting crucible.
An apparatus for countergravity casting a metallic material, the apparatus comprising:
- a crucible for holding melted metallic material;
- a casting chamber for containing a mold;
- a fill tube capable of extending into the crucible to communicate melted metallic material to the casting chamber;
- a gas source coupled to a headspace of the melting crucible to allow the gas source to pressurize said headspace to establish a pressure differential to force the melted metallic material upwardly through said fill tube into said mold;
- and
- means for preventing extraneous sulfur from entering the melted metallic material from a surrounding environment.
Dependencies are inferred from the claim text.