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Priority to ES402132ApriorityCriticalpatent/ES402132A1/en
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A method of producing casting molds and cores, in which mold boxes or core boxes are filled with self-hardening molding sand as filler, ligno-sulfonate of an alkali metal, alkaline earth metal, ammonium, or a mixture thereof as a binder, and a hardener, and are allowed to harden to air, characterized in that the hardener is a material containing alkali metal aluminate. (Machine-translation by Google Translate, not legally binding)
ES402132A1972-04-261972-04-26A method of producing molds and machines of foundry. (Machine-translation by Google Translate, not legally binding)
ExpiredES402132A1
(en)