一、前言由于抛砂机与一般造型机的造型方式完全不同,对操作者的熟练程度,各种辅助装置和型砂等的要求非常严格。近年来,这些问题逐渐得到了解决。特别是抛砂机的结构有了很大的改进,采用了液压驱动和遙控,因此操作者只需经过短期训练即可,同时也减轻了劳动强度。砂处理技术的改进,也促使抛砂机的迅速推广。日本 I. Preface As the sand throwing machine and the general shape of the modeling machine is completely different, the proficiency of the operator, a variety of auxiliary devices and sand requirements are very strict. In recent years, these problems have been gradually solved. In particular, the structure of the sand throwing machine has been greatly improved, using hydraulic drive and remote control, so the operator only needs short-term training and at the same time reduces labor intensity. Sand treatment technology improvements, but also prompted the rapid promotion of sand throwing machine. Japan