Metal founding – Control means responsive to or actuated by means sensing or... – Control of feed material enroute to shaping area
Patent
1977-08-11
1979-03-27
Spicer, Jr., Robert L.
Metal founding
Control means responsive to or actuated by means sensing or...
Control of feed material enroute to shaping area
164 61, 164136, 164256, 164336, 425546, B22C 1904, B22D 1732
Patent
active
041460812
ABSTRACT:
The present method and apparatus for die casting of metals such as aluminum, is especially suitable for casting under vacuum. The casting is performed under such operating conditions that a contact between the molten metal being cast and the free atmosphere is avoided all the way from the melt to the casting proper. For this purpose, the present casting apparatus includes a closeable and evacuable transport container connected to the casting apparatus proper by a coupling which is also evacuable. The transport container is placed on a filling chamber and the evacuating apparatus is arranged to simultaneously evacuate the filling chamber, the transport container and the coupling between the transport container and the filling chamber proper. The evacuation takes place in a direction opposite to the flow direction of the metal being cast. If desired, further evacuating means may be provided for evacuation of the filling chamber and the die in the direction of the metal flow. The vacuum is switched off in response to the operation of a pressure piston after the filling opening of the filling chamber has been closed.
REFERENCES:
patent: 2610372 (1952-09-01), Schroeder
patent: 3019495 (1962-02-01), Cornell
patent: 3103698 (1963-09-01), Wollett
patent: 3321806 (1967-05-01), Beebee
patent: 3335462 (1967-08-01), Grigull et al.
patent: 3393837 (1968-07-01), Takeshima
Fasse W. G.
Gould D. F.
Spicer, Jr. Robert L.
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