本文根据该厂三年来生产液压起重机铸件五万余件的体会,肯定了石灰石砂组芯铸造法是获得中小型优质铸钢件的有效措施.文中简介了铸造生产工艺.着重阐述了组芯的排气可防止铸件气孔;石灰石砂代替水玻璃硅砂是解决生产薄壁件和内腔粘砂的关键.(图6个,表3个) This article according to the factory three years to produce hydraulic cranes castings of more than 50,000 pieces of experience, affirmed the limestone sand group core casting method is to obtain small and medium-sized high-quality castings of the effective measures.This article describes the casting production process.Focus on the core Exhaust gas prevents casting porosity; Limestone sand replaces water glass Silica sand is the key to solving the problem of producing thin-wall parts and cavity sticking sand (Figure 6, Table 3)