Method and apparatus for casting extrusion dies

Details Method and apparatus for casting extrusion dies Method and apparatus for casting extrusion dies

1975-07-03

1977-02-01

Vlachos, Leonidas

Metal working

Plural diverse manufacturing apparatus including means for...

Binding or covering and cutting

295276, 164125, 249108, 269 43, B22C 908, B22C 906, B22C 920

Patent

active

040055116

ABSTRACT:
The specification discloses a method and related apparatus for casting aluminum extrusion die blanks, both cored and uncored, of molten steel. A disc-like carbon or other suitable material mold having spaced side walls joined by a peripheral edge wall is filled through a sprue oriented tangentially on the peripheral edge wall of the mold. The center areas of the mold side walls are made thinner than the peripheral portions of the side wall and thinner than the peripheral edge wall such that the center of the mold cools more quickly from both sides thereof than the circumferential periphery of the mold. A core void can be made in the die blank by providing a non-permanent core shaped to basically the desired cross-section and adhered to an insert which fits into a receiving cavity in the inside of the mold. Extending appendages of the core are shaped outwardly towards the periphery of the mold cavity, away from the position they should finally take, to a distance sufficient to compensate for shrinkage of steel as it cools.

REFERENCES:
patent: 695090 (1902-03-01), Clark et al.
patent: 848480 (1907-03-01), Myers
patent: 1455091 (1923-05-01), Nichols
patent: 2420003 (1947-05-01), Miller
patent: 2423151 (1947-07-01), Miller
patent: 3480070 (1969-11-01), Beetle et al.
patent: 3892516 (1975-07-01), McGrew et al.

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