Patent ID: 6932143
Filing Date: 2005-08-23
Classification: B22D

Abstract:
1. A method for casting a metal article, said process comprising the steps of: providing a mold body having a longitudinal axis with a hollow bore defining a mold cavity extending axially through said body from a first open end to a second closed end of said mold body, said second end of said body having a substantially frustoconical shape defining a surface converging toward an axial center of said mold body; orienting said mold body in a near vertical orientation with respect to said longitudinal axis in order for the casting metal to flow on the mold lining surface, without splashing, to said closed end of the mold and rotating said mold about a vertical axis; introducing a molten metal into said mold cavity while continuously rotating said mold body at a rotational speed sufficient to distribute said molten metal along said frustoconical shaped surface; and pivoting said mold body to orient said longitudinal axis of said mold body at an angle with respect to said vertical orientation while continuously rotating said mold body about its longitudinal axis at a rotational speed to distribute said molten metal along a length of said hollow bore in a horizontal orientation; and solidifying said molten metal to produce a centrifugal cast hollow metal article having a substantially cylindrical shaped hollow body with a closed frustoconical hollow end.