The solving method of it is that the ventilative property of coat should be taken no account of whicn can increasing thickness and intension to block off the flow of mould sa...

• 解决的办法是:由于这一真空度高于砂箱内的值,故可不考虑该处涂层的透气性,增加其涂层厚度及强度以阻挡型砂流动,或者把直浇道与浇口杯制成一体,这样问题就得以解决了。