Patent ID: 6478074
Filing Date: 2002-11-12
Classification: B22C,F02F

Abstract:
A procedure for manufacturing a cast steel camshaft with an interior cavity in a â€œlost-foamâ€  casting procedure with a meltable model (4), in which the camshaft is cast out of a material that is cast in a casting mold in a single casting process, and said model (4) is filled in and enveloped by mold sand, wherein the camshaft is poured by filling and melting out said model (4) with steel melt and wherein a length of the model (4) exhibits notches (5) to a casting channel (3) that runs axially parallel to a longitudinal axis of the model (4) along said length of the model (4) and is used exclusively for an ascending casting of the steel melt, wherein the casting channel (3) is filled with said steel melt from below and wherein a top end of the casting channel (3) is provided with a throttle valve for generating a pressure exceeding atmospheric pressure inside this channel (3) during the casting process.