An apparatus is disclosed to measure with accuracy and stability the permeability of molding sand that is compacted, by directly applying compressed air to the compacted molding sand such that the air circulates through the molding sand. The apparatus includes a hollow testing cylinder (1) having...http://www.google.fr/patents/US5736632?utm_source=gb-gplus-shareBrevet US5736632 - Apparatus for measuring air permeability of molding sand
Apparatus for measuring air permeability of molding sand
