By applying ihe potential method to the hardening process of water glass CO_2 sand,the time of blowing CO_2 can be determined accurately,the productivity of molding and core- making can be increased,CO_2 can be saved and cast quality can be improved.

• 对水玻璃 CO_2砂硬化过程,采用电位法可以准确确定吹 CO_2时间,提高造型制芯生产率,节约 CO_2和提高铸型质量。