PROCESSO PARA A FABRICAÇÃO DE UMA AREIA PARA MACHO E/OU DE MOLDE PARA FINALIDADES DE FUNDIÇÃO

摘要

A method for producing a core sand and/or molding sand for casting purposes mixes a basic granular mineral molding material such as silica sand with an additive based on an organic or inorganic component, a binding agent being optionally added. The additive is coarsely ground prior to the mixing process, more than 50 percent by weight of the grains having a minimum size of approximately 0.05 mm.