Method for making casting annulus using independently positioned graphite inserts

摘要

The present invention relates to a method of manufacturing a molten metal casting annulus that includes an insert support and cooling frame configured and constructed to define a plane and an annular face generally perpendicular to the plane. The plane and annular face define an enclosed planar annular space. The frame further defines an annular groove adjacent the annular face and a multiplicity of insert components supported on the insert support and cooling frame. The insert components are fitted edge to edge around the casting annulus to define the annulus. The insert components further include a lip snugly fitted in the annular groove. The method includes chilling the graphite casting annulus insert components before inserting the lip of the respective insert components into the annular groove in the frame and allowing the insert components to warm and thermally expand to lock the lip in position in the groove.