Continuous casting of hollow shapes

Details Continuous casting of hollow shapes Continuous casting of hollow shapes

1979-07-30

1981-03-24

Baldwin, Robert D.

Metal founding

Process

Shaping liquid metal against a forming surface

164 85, B22D 11124, B22D 11128

Patent

active

042574722

ABSTRACT:
An apparatus for the continuous casting of hollow metal shapes includes a cooled, open-ended mold having a cooled mandrel positioned centrally of the mold cavity. The inner surface of the mold and outer surface of the mandrel together define a casting space. Molten metal is teemed into this space and solidifies adjacent the inner surface of the mold and the outer surface of the mandrel. In this manner, a body consisting of a molten mass confined between a pair of solidified skins is formed. The body is continuously withdrawn from the mold thereby generating a continuous strand which is hollow due to the presence of the mandrel in the mold. The outer surface of the strand is sprayed with coolant outside of the mold so that the molten mass within the strand solidifies progressively. The mandrel is provided with a passage which opens to the hollow center of the strand and a finely divided solid such as sand is fed into the center of the strand via this passage. The solid forms a core which provides a certain degree of support for the inner surface of the strand and extracts a certain amount of heat from the latter. After solidification of the strand, the latter is cut into sections and the core is removed to yield hollow shapes.

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patent: 3713478 (1973-01-01), Vogt et al.
patent: 3886996 (1975-06-01), Tseitlin

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