Casting method

Details Casting method Casting method

1980-04-18

1982-10-12

Hampilos, Gus T.

Metal founding

Process

Shaping liquid metal against a forming surface

1641221, 164127, B22D 2506

Patent

active

043534058

ABSTRACT:
An improved method of casting an article includes using the same starter element during the casting of a plurality of metal articles. In one specific instance the starter element consisted of a single metal crystal. The single crystal starter element was used to initiate the solidification of molten metal in a mold to form a single crystal cast article. This was done without significant bonding between the solidified metal and the single crystal starter element. Therefore, the starter element could be separated from the solidified body of metal and subsequently used in the casting of another article. In order to tend to maximize the rate of heat transfer from the starter element and to tend to minimize bonding of the molten metal with the starter element, the starter element is advantageously located in a recess in a chill block with an upper surface of the starter element even with an upper surface of the chill block. In order to retard formation of condensation and to prevent eroding of the metal of the starter element, one or more layers of metallic foil may be disposed between the starter element and the mold cavity.

REFERENCES:
patent: 2791813 (1957-05-01), Delano
patent: 3514069 (1970-05-01), Daley
patent: 3633648 (1972-01-01), Barrow et al.
patent: 3759310 (1973-09-01), Barrow et al.
patent: 3915761 (1975-10-01), Tschinkel et al.

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