METHOD FOR MEASURING THE AMOUNT OF AN ACTIVE CLAYEY COMPONENT CONTAINED IN MOLDING GREENSAND

摘要

A method is disclosed to accurately and easily measure the amount of anactive clayey component contained in molding greensand. A test piece isproduced by feeding a predetermined amount of the molding greensand into atesting receptacle. The test piece is then tested to obtain its compressivestrength. The amount of the active clayey component contained in it isdetermined from the measured compressive strength by using previouslyobtained data on the relation between the compressive strength and the activeclayey component of molding greensand which is used on a mold-producing lineor at a factory.