B - Operations – Transporting – 22 – D
Patent
B - Operations, Transporting
22
D
22/51
B22D 11/00 (2006.01)
Patent
CA 1103879
CONTINUOUS CASTING PROCESS FOR PRODUCTION OF METALLIC HOLLOW INGOT Abstract of the Disclosure The specification discloses a continuous casting process for the production of hollow ingots using improved direct chill casting equipment. The improved equipment has a molding system comprising a hollow mold and a mov- able platform forming the bottom of the mold. The mold has a centrally located core and a pipe for introducing atmospheric air to the lower surface of the core. The core is made from a refractory material unwettable by the molten metal and has a downwardly convergent taper at the sides. The continuous casting process comprises continuously pouring a molten metal into the space defined between the hollow mold and the core of the above equip- ment; cooling the molten metal only adjacent the side wall of the hollow mold without cooling adjacent the core; thereby solidifying the molten metal to form an ingot having a central hollow portion. The interface of the solidified metal and the liquid metal is positioned around the core by suitably adjusting the condition and the ingot thus formed is continuously lowered while al- lowing atmospheric air to enter the hollow portion of the ingot via the pipe mentioned above. The process results in the production of hollow ingots from simple equipment which can be continuously operated without undue difficulty.
316705
Koshiba Junichi
Nakagami Hideki
Nakahira Kou
Kirby Eades Gale Baker
Sumitomo Aluminium Smelting Company Limited
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