Investment casting

摘要

Pre-molding of wax or similar sacrificial material over one or more cores (20) facilitates a subsequent molding over a core assembly (110). Individual cores or groups thereof may be pre-molded in a wax body (90). One or more such wax bodies (90A, 90B, 90C) may be assembled with other bodies and/or other cores (110) to facilitate a main wax molding of such assembly in a die (112).