Patent ID: 6453979
Filing Date: 2002-09-24
Classification: B22C,B22D

Abstract:
Casting apparatus, comprising a refractory mold disposed in a chamber and having one or more mold cavities, a melt reservoir disposed in the chamber and connected to the mold and having a reservoir volume for holding at least enough melt to fill said one or more mold cavities, said reservoir having an inverted loop feed gate that communicates with a lower region of said reservoir and to said one or more mold cavities, said loop feed gate being configured to have a loop region above a melt level in said reservoir to prevent flow of said melt residing in said reservoir to said one or more mold cavities, and means for gas pressurizing said melt in said reservoir to force said melt from said reservoir through said loop feed gate into said one or more mold cavities.