Method for modifying refractory molding particles and refractory molding particles obtained thereby and process for producing mold
AssigneeItochu Ceratech Corporation
InventorsHiroshi MAKINO, Masami ONO
Life of this patent
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Abstract
Providing a method of modifying refractory particles used to produce a casting mold by using a furan resin as a binder, so as to effectively improve a strength of the casting mold and to reduce a required amount of the binder. An artificial aggregate which is artificially produced and which has an apparent porosity of not more than 5% is used as the refractory particles, and the artificial aggregate is subjected to a heat treatment at a temperature of 400-1500° C. for not shorter than one hour in a heating atmosphere having an oxygen concentration of not higher than 15%.
Claims14
A method of modifying refractory particles used to produce a casting mold by using a furan resin as a binder, so as to improve a strength of the casting mold, characterized in that:
- an artificial aggregate which is artificially produced and which has an apparent porosity of not more than 5% is used as the refractory particles, and the artificial aggregate is subjected to a heat treatment at a temperature of 400-1500° C. for not shorter than one hour in a heating atmosphere having an oxygen concentration of not higher than 15%.
Dependencies are inferred from the claim text.