成批量的铝合金铸件,采用金属型铸造无疑有较大的优越性。它不但具有表面光洁、加工量少、节约原材料的优点,而且还能得到晶粒细小的组织,提高机械性能。此外,又能减少操作工序,改善劳动条件,从而提高劳动生产率。如何使金属型生产的产品达到理想的成品率,我厂着重在冒口设置方面进行了大胆的改革和尝试。经过近年来多次实践,略谈以下几点意见。一、由于铝合金收缩率较大,易形成 Bulk aluminum alloy castings, the use of metal casting will undoubtedly have greater advantages. It not only has a smooth surface, less processing, saving the advantages of raw materials, but also get small grain structure, improve mechanical properties. In addition, they can reduce operational procedures and improve working conditions so as to increase labor productivity. How to make metal-based products to achieve the desired yield, our factory focused on riser settings for a bold reform and try. After many practice in recent years, a few comments on the following. First, due to aluminum shrinkage, easy to form