Stopper rod tapping assembly and filament forming process

Details Stopper rod tapping assembly and filament forming process Stopper rod tapping assembly and filament forming process

1975-02-20

1976-06-22

Baldwin, Robert D.

Metal founding

Process

Shaping liquid metal against a forming surface

164 82, 164259, 164281R, B22D 1110

Patent

active

039645355

ABSTRACT:
A stopper rod tapping assembly for bottom tapping of a crucible to extrude molten metal through a tapping orifice is described. The stopper rod has an interior vent, providing communication of a pressurized inert gas from above the melt to the tapping orifice in the bottom of the crucible. The vent permits flushing of the tapping orifice between tapping runs to prevent buildup of residues in the tapping orifice which would otherwise adversely affect the tapping operation. The assembly is advantageously used in casting filaments from the molten metal.

REFERENCES:
patent: 3200457 (1965-08-01), Wagstaff
patent: 3503597 (1970-03-01), Kessler et al.
patent: 3565412 (1971-02-01), Moniot
patent: 3886992 (1975-06-01), Maas et al.

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