Method for continuous casting of a hollow metallic ingot and app

Details Method for continuous casting of a hollow metallic ingot and app Method for continuous casting of a hollow metallic ingot and app

1990-07-18

1991-10-01

Seidel, Richard K.

Metal founding

Process

Shaping liquid metal against a forming surface

164415, 164421, 164444, 164464, 164475, 164483, B22D 1100, B22D 1108

Patent

active

050524690

ABSTRACT:
In a continuous casting a hollow ingot by means of a forcedly cooled tubular mold and a core, gas is introduced around an outer peripheral surface of the core along longitudinal slits to form an annular gap surrounding an inner peripheral surface of hollow metallic molten metal, and gas pressure is applied on said inner peripheral surface of the hollow molten metal. Refractory heat-insulative material, starter bar, is brought into contact with the molten metal poured into said annular space at the casting start, encased in the metal solidified thereon, and withdrawn together with the hollow ingot being withdrawn. By these methods smooth cast skin is formed on the inner peripheral surface of a hollow ingot.

REFERENCES:
patent: 3623534 (1971-11-01), Brennan
patent: 4126175 (1978-11-01), Getselev
patent: 4157728 (1979-06-01), Mitamura et al.
patent: 4205716 (1980-06-01), Nakahira et al.
patent: 4598763 (1986-07-01), Wagstaff et al.
patent: 4719959 (1988-01-01), Nawata et al.

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