SQUEEZE HEAD ASSEMBLY FOR MOLDING MACHINES

摘要

A molding machine for making metal casting sand molds having for compacting the sand a squeeze head presenting to the sand a diaphragm backed by a liquid-filled pressure chamber open to the liquid side of an accumulator which adds liquid to the chamber for an initial compacting of the sand under low pressure and receives liquid therefrom during projection of the head in a final high-pressure compacting stage.