BINDER COMPOSITION AMD METHOD OF FORMING FOUNDRY SAND CORES AND MOLDS
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United States of America Patent
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Issued Date -
Feb 24, 2011
app pub date -
Sep 10, 2007
filing date -
Sep 8, 2006
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Abandoned
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Abstract
A cost-effective starch/water-based binder composition and related method for forming silica sand cores and molds for foundries, wherein the sand grains are pre-coated with starch having additives making the coated sand effective for blowing said cores and molds. One or more additives are included with the starch; preferably sodium tripolyphosphate and -silicon or Silres BS16. The preferred starch is a tapioca starch. The binder of the invention is highly competitive due to its low cost and effectiveness for forming silica-sand cores and molds, being particularly effective for use in aluminum foundries for the automotive industry.
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