一、总的趋向在国外,由于铸造技术的发展,特别是造型材料、造型工艺装备和造型设备的发展,已使多品种小批量铸件采用机械化流水生产的问题得到了较好的解决。按铸件的大小,这种流水线可分为两种类型:中小型铸件多品种、小批量的情况和中大 First, the general trend In foreign countries, due to the development of foundry technology, especially the development of modeling materials, modeling process equipment and modeling equipment, the problems of using mechanized water flow production for many varieties and small batches of castings have been solved well. According to the size of the casting, this pipeline can be divided into two types: small and medium-sized castings of more varieties, small quantities of the situation and CUHK