Gm Global Technolgoy Operations, Inc.

Edward C Wall

Kenneth George Stahl, Jr

Thomas P Newcomb

Mark A Osborne

Barry L Priem

James T Singer

Allen T Birschbach

Venkatramanan Srinivasan

A casting mold and method for its use to achieve in-mold modification of the casting metal is disclosed. One or more chambers are located within the casting mold's runner system. Each chamber can contain metallurgical modifiers for adjusting the chemical composition of the metal to improve the mechanical and physical properties of an article cast from the metal. One or more modifiers can be placed in the chamber(s) as the casting mold is assembled for use. As the melt is introduced to the casting mold, it passes through the chamber(s) and liquefies the modifier. Amounts of the liquid modifier, then, are carried away and become dispersed in the melt as it continues through the runner system and into the mold cavity. The metallurgical modifiers can be selected from any number of known additives or alloying elements, including strontium, among others.

Casting mold and method for casting achieving in-mold modification of a casting metal

A mold design is disclosed for precision sand casting of engine cylinder blocks, such as engine cylinder V-blocks, having chills disposed therein, wherein an expansion and contraction caused by changes in temperature during the casting operation are accommodated by the chills.

Mold design for castings requiring multiple chills

A method for preparing engine block cylinder bore liners is disclosed, the method including preconditioning of the cylinder bore liners for use in sand casting of engine cylinder blocks, wherein an efficiency of the preconditioning process is maximized, a metal pour temperature is minimized, and material properties of the casting are optimized.

Method for preparing engine block cylinder bore liners

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Midland, MI, United States of America

Edward C Wall