GB708782A - A method and an apparatus for casting with rotating crucible - Google Patents

Abstract

708,782. Centrifugal machines; crucibles; removing occluded gases &c. from molten metals. PEMETZRIEDER, G. May 19, 1952, No. 12668/52. Classes 23, 72, and 82 (1) Metal is treated in a centrifuging apparatus prior to casting by pre-heating a melting pot, with or without the metal to be centrifuged,. to a temperature such that the metal in or added to the pot remains molten during the centrifuging operation, placing the pot in the centrifuge and centrifuging the metal in or added to the pot. The melting pot 1, Fig. 1, is heated in a separate furnace and, with its liquid charge, is placed within a centrifugal container 2 which is rotated by a pulley 3, the centrifuged metal being delivered by a pipe 7 rotated by a handle 8. Where the liquid metal may be slag covered, the pipe 7 is fitted with a cutting blade 11, Fig. 4, which cuts the slag covering before the pipe enters. In a modification, Fig. 2, an opening 16 in the bottom of the melting pot 15 connects with a bore 14 in the shaft 13 and in the centrifugal container 12. The metal is blown out through 14, 16 by air or gas supplied by a pipe 21 or may be allowed to drain out by gravity when the container 12 is slowed or stopped. The centrifuging apparatus may be either stationary or transportable.