US 10,682,695 B2 · Method for the semi-permanent mold casting process

Abstract

A method for casting metal using a semi-permanent mold connected to a feed portion includes forming a coolant jacket in a sprue of the feed portion. A coolant source is connected to the coolant jacket. A metal in a molten state is poured into the feed portion for gravity induced flow into the semi-permanent mold. A wall thickness of the sprue is predetermining which minimizes heat transfer from the sprue, thereby forcing the metal in the molten state to cool slower in the sprue than in the mold. After a predetermined time for the metal to cool to a solid state in the mold, flow of a coolant from the coolant source into the coolant jacket is initiated to cool the metal in the sprue before opening the mold.

Claims8

Dependent claims

A method for casting metal using a semi-permanent mold connected to a gating section and a feed portion, the method comprising:

connecting the gating section for fluid communication with the semi-permanent mold;
incorporating a force cooled sprue in the feed portion;
preforming a coolant jacket in the sprue about a shell;
connecting a coolant source to the coolant jacket extending the coolant jacket for a substantial length of the sprue;
pouring a metal in a molten state into the feed portion for gravity induced flow into each of the gating section and the semi-permanent mold;
and
during a predetermined time for the metal to cool to a solid state in the mold, initiating flow of a coolant into the coolant jacket to cool the metal in the sprue before opening the mold.

4 more elements

Dependencies are inferred from the claim text.

Method for the semi-permanent mold casting process

Life of this patent

Method for the semi-permanent mold casting process

Life of this patent

Abstract

Claims8