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Priority to ES402729ApriorityCriticalpatent/ES402729A1/en
Publication of ES402729A1publicationCriticalpatent/ES402729A1/en
Process for producing molds and cores for casting, in which the patterns of molds or cores are filled with a sand or a mixture of sand that hardens on its own, containing sand molding, hydraulic cement as a binder and a surfactant material, and they are left in the air for hardening, said process being characterized in that the sand mixture also contains an alkali metal aluminate and an alkali metal carbonate. (Machine-translation by Google Translate, not legally binding)
ES402729A1972-05-131972-05-13Procedure to produce molds and machines for foundry. (Machine-translation by Google Translate, not legally binding)
ExpiredES402729A1
(en)
Manufacturing procedure of an agglutinant intended for the manufacture of sand molds for foundry. (Machine-translation by Google Translate, not legally binding)
Improvement for the manufacture of molding compositions for the formation of machines and molds of foundry. (Machine-translation by Google Translate, not legally binding)
Improvements in the manufacture of prefabricated blocks of concrete for the construction of walls. (Machine-translation by Google Translate, not legally binding)