METHOD FOR REMOVING CORE SAND STUCK TO CAST PRODUCT

摘要

PROBLEM TO BE SOLVED: To easily and fully remove sand from a cast product having fine and complicated core shape, such as automobile engine in a method for removing the core sand stuck to a workpiece.;SOLUTION: This method for removing the core sand is performed as the followings, by which a cast product formed with the casting and stuck to the core sand is held for 10-30 min at ≥0.9 ml/min flow speed in fluid mainly containing carbon dioxide pressurized at ≥10 MPa pressure and heated at ≥40°C, or the above cast product is held for ≥0.5 ml/min flow speed and for 10-30 min in the fluid mainly containing the water having ≥20 MPa and at ≥150°C temperature to remove the core sand.;COPYRIGHT: (C)2006,JPO&NCIPI