METHOD FOR MOLDING GREEN SAND CORE

PURPOSE:To manufacture a core having the specific strength by adjusting as pressing the special structural sticking rod having impeller in green sand in a cavity. CONSTITUTION:After packing the green sand 86 in the cavity 84, the cylindrical sticking rod 40 and sticking rod 30 providing the impeller 50 as relatively movable in the inner part thereof 40 are pressed in the green sand 86. Successively, under stopping condition of the impeller part 50 to the press-in position, after drawing out the sticking rod body part 40, the impeller 50 is rotated and the green sand 86 beforehand. charged is compressed by pushing in the sticking rod body part 40. By this method, the green sand core having the prescribed strength can be manufactured.