Foundry mixes containing carbonate salts and their uses

Abstract

Disclosed is a foundry mix containing a carbonate 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.

Description

[0001] Cross references to related applications [0002] This application claims the priority of the U.S. Provisional Application Serial No. 61 / 286,913 filed on December 16, 2009, the entire content of which is incorporated herein by reference. Background technique [0003] Quartz sand (SiO 2 , Quartz) is widely used in the metal casting industry as an aggregate to produce molds and cores. The quartz sand is used for "green sand" (sand bonded with water and clay) and chemically bonded sand. Use a variety of inorganic and organic adhesives, including sodium silicate adhesives, and phenolic polyurethane, furan, epoxy-acrylate, and ester hardening phenolic adhesives, and acid hardening phenolic adhesives. [0004] The binder is mixed with the sand and the mixture is compacted in the process equipment to form the desired mold and core molding, and then the binder hardens and bonds the sand particles together. The mold and core components are then assembled into a mold assembly, the met...

AI Technical Summary

Problems solved by technology

For example, iron oxide when used above about 2 wt% based on sand (BOS) can cause increased metal infiltration and reduced mold / core strength when used at higher levels

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