江北机械厂生产的SS-800离心机是1981年四川省经委命名的优质产品。但是在较长时间中,该机转鼓底铸造质量不稳定,废品率高,增加了产品的成本和严重影响机器的外观质量。1980年转鼓底的废品率为58%,材料损失达11380公斤。针对这一问题,厂里铸造车间在有关部门的大力 The SS-800 centrifuge produced by Jiangbei Machinery Factory is a high-quality product named by Sichuan Economic Commission in 1981. However, in a relatively long period of time, the casting quality of the drum bottom is unstable and the reject rate is high, which increases the cost of the product and seriously affects the appearance quality of the machine. In 1980, the waste rate at the bottom of the drum was 58% and the material loss was 11,380 kg. In response to this problem, the foundry workshop of the factory vigorously