(under subclass 349) Apparatus having means to provide a reservoir of molten metal for feeding into the mold cavity proper as the metal in the mold solidifies to compensate for liquid shrinkage.
(1) Note. The reservoir, e.g., riser, hot top sink head, etc., must be designed to furnish additional metal to the mold cavity proper after the teeming has ceased.
(2) Note. In a top pouring mold the sprue, gate and riser are often integrated.
SEE OR SEARCH THIS CLASS, SUBCLASS:
45, for processes of making patterns which may have a riser shaping portion.
80, for processes of controlling pipe by insertion of solid metal into the mold as the cast metal solidifies. 120, for processes of pressure casting involving a secondary pressure application to densify the cast metal.
122+, for methods of controlling solidification of the cast metal.
162, for apparatus means for shaping risers.
244, for pattern means to shape sprue.
SEE OR SEARCH CLASS
249, Static Molds,
82, metal mold having means to adjust mold volume during molding, subclasses 105+ for static filling means in contact with mold cavity, and subclasses 197+ for sink head or hot top, per se.
