Metal founding – Process – Shaping liquid metal against a forming surface
Patent
1978-11-22
1980-06-03
Baldwin, Robert D.
Metal founding
Process
Shaping liquid metal against a forming surface
164421, B22D 1104
Patent
active
042057167
ABSTRACT:
Continuous casting process for the production of hollow ingot using an improved direct chill casting equipment having a molding system comprising a hollow mold and a movable platform, wherein at least one core and a pipe for introducing outer air are provided, said core being made from a refractory material unwettable with a molten metal and having a convergent taper at the side and an air runner for introducing outer air, which is packed with an air-permeable material, at the bottom, and said pipe for introducing outer air extending upwards from the air runner and passing through the core. The continuous casting process comprises continuously pouring a molten metal into a space surrounded with the hollow mold and the core of the above equipment; cooling the molten metal only at the side wall of the hollow mold without cooling at the side of the core; thereby solidifying the molten metal to form an ingot having a hollow, wherein the interface of the frozen metal and the liquid metal is present at the position around the core; and continuously lowering the ingot thus formed while introducing spontaneously outer air into the hollow part via the pipe for introducing outer air and the air runner of the core.
Koshiba Junichi
Nakagami Hideki
Nakahira Kou
Baldwin Robert D.
Sumitomo Aluminum Smelting Company, Ltd.
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