Refractory mold and method of making

摘要

A refractory mold is disclosed. The refractory mold includes a fugitive pattern assembly comprising a hollow sprue that comprises a sprue wall disposed about a longitudinal axis; a pattern disposed outwardly of the sprue wall; and an outwardly extending gate attached to and extending between the sprue wall and the pattern, the hollow sprue, pattern and gate each formed from a fugitive material; and a refractory mold formed on and having a mold cavity defined by an outer surface of the fugitive pattern assembly.

主权项

1. A refractory mold, comprising:
a fugitive pattern assembly comprising a hollow sprue that comprises a sprue wall disposed about a longitudinal axis; a plurality of patterns disposed outwardly of the sprue wall; and a plurality of outwardly extending gates attached to and extending between the sprue wall and the pattern, the hollow sprue comprising a plurality of joined individual pattern segments, each pattern segment comprising an axially-extending pattern section of the sprue wall, a pattern spaced away from the pattern section of the sprue wall, and a gate attached to and extending between the pattern and the pattern section of the sprue wall, the pattern sections of the sprue wall joined to form the assembly, the hollow sprue, patterns and gates each formed from a fugitive material; and a refractory mold formed on and having a mold cavity defined by an outer surface of the fugitive pattern assembly including the hollow sprue portion comprising joined pattern segments.