(under subclass 159) Apparatus with means specially adapted for shaping thin mold sections of resin-sand mixtures, i.e., shell molds.
(1) Note. Depending upon the extent of unsupported shell sections and the gravity head of the liquid or molten casting metal, the shell may be externally backed up with steel shot, sand or similar material.
SEE OR SEARCH THIS CLASS, SUBCLASS:
21, for shell molding processes of spraying mold materials against a shaping surface.
361, for shell molds.
526+, for processes of shaping fluent mold material containing resin.
