ASSEMBLY CORE FOR CASTING MOLD OF EGR VALVE HOUSING AND CASTING MOLD USING THE SAME.

摘要

The present invention relates to a molding for a gravitational casting for manufacturing a housing of an exhaust gas recirculation (EGR) valve. In order for a plurality of inner cores not to be respectively installed inside a lower mold, a self-assembly core is additionally manufactured. Individual cores are combined to the self-assembly core and are integrated together. The integrated core is fixated to the lower mold to increase the productivity of assembling a mold, prevent wavering or breakaway of the core during the assembly and pouring of the mold. Also, the generation of impurities such as molding sand can be prevented to deter defects of the valve housing.