Ask Chemicals Gmbh

Sean B Harmon

Ronald C Aufderheide

Sam Nerone Ramrattan

Steven Johnston

Ralph E Showman

Lee R Horvath

Thomas Brandt

A sleeve () allows flow against gravity of molten metal into a casting mold. The sleeve has a sleeve body () with a longitudinal axis that defines a flow conduit for the metal. A check valve () is positioned in the flow conduit, arranged for limited axial movement in the sleeve between a closed position and an open position, although it is operatively positioned to be in the closed position in the absence of the pressurized metal. The check valve has a spool () with an internal flow conduit, a top end of the conduit blocked by an end cap (). Flanges () on the spool provide the limited axial movement in the sleeve. When lifted into the open position, metal flows into the spool flow conduit and through a porous structure of the spool, causing laminar flow and filtering inclusions.

Filtering check valve for metal casting

Breaker core

Disclosed is a foundry mix containing a sulfate and/or nitrate salt and its use to make foundry shapes by the warm-box, hot-box, no-bake, and cold-box process, the use of these foundry shapes to make metal castings, and the metal castings prepared by the process.

Foundry mixes containing sulfate and/or nitrate salts and their uses

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Columbus, OH, United States of America

Sean B Harmon