Die casting process and apparatus comprising in-die plunger dens

Details Die casting process and apparatus comprising in-die plunger dens Die casting process and apparatus comprising in-die plunger dens

1982-06-23

1988-10-25

Godici, Nicholas P.

Metal founding

Process

Shaping liquid metal against a forming surface

164320, B22D 2711

Patent

active

047796669

ABSTRACT:
A metal die casting apparatus preferably comprises a plunger core and a stationary core adapted to form recesses in the casting and to densify the metal to reduce shrink porosity. The cores are located at opposite sides of a die cavity and the plunger core is moveable in the direction of the stationary core to penetrate the metal while in a partially solidified, extrudable state. The cores are suitably shaped to displace metal laterally as the plunger core advances. The apparatus is particularly suited for forming a casting comprising an enlarged region intended to define a bore completely therethrough and surrounded by dense, nonporous metal.

REFERENCES:
patent: 2181157 (1939-11-01), Smith
patent: 3068539 (1962-12-01), Wilcoxon
patent: 3106002 (1963-10-01), Bauer
patent: 3120038 (1964-02-01), Lauth
patent: 3664410 (1972-05-01), Groteke
patent: 4380261 (1983-04-01), Suzuki et al.

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