Method of continuously transforming solid non-ferrous metal into elongated extruded shapes
OwnerRobert J. Myotteinventor
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Abstract
A method and apparatus for continuously extruding non-ferrous metal is shown and described wherein solid metal, such as bar stock, is fed into an entry port of an entirely enclosed melting crucible until the crucible is full of molten metal. A seal is maintained between the metal being fed and the entry port to establish pressure in the crucible and to prevent leakage back through the entry port. When the crucible is full, means are provided to re-solidify the molten metal adjacent a closed exit port. Thereupon, the exit port is opened and the re-solidified metal is extruded through the exit port at the same volumetric rate as metal is fed through the entry port.
Claims10
The method of continuously transforming solid non-ferrous metal into elongated extruded shapes in an enclosed crucible having an entry port and an exit port remote from said entry port comprising the steps of:
- a. feeding said solid metal through said entry port into the interior of said crucible;
- b. melting said solid metal as it enters said crucible until said crucible is filled;
- c. continuing to feed said solid metal into said crucible to apply hydrostatic pressure to said melted metal;
- d. continuing to melt said solid metal as it enters said crucible;
- e. cooling the portion of said melted metal adjacent said exit port until said melted metal re-solidifies;
- f. continuing to cool said re-solidifed metal to extruding temperature;
- g. continuing to apply hydrostatic pressure to said metal within said crucible by continuing to feed said solid metal through said entry port whereby said re-solidified metal is extruded through said exit port.
Dependencies are inferred from the claim text.