стальной шарик форма

Properties of mold: Xinningmold applies the technics of refrigerated molding, even and smooth in surface crystal; and the hardness is improved obviously. The hardness inside and outside are coincident basically, which improves wear resistance. Xinningmold is easy to operate. The dies of the same specification are able to change each other. The using effect of replacing ball core is the same as that of new die, reducing use cost. Xinningmold has no out of circularity and no fault of casting, high in using rate of molten iron and making rate, longer in service life. Xinningmold is the best choice to substitute single die, one-off die and silicon founding at present.