人们对作为方便地制造高级而复杂铸件的新的铸造工艺方法——冷冻铸型法,兴趣正越来越高。该法是用液态氮之类的制冷剂来冻结型砂,做成的单纯铸型。该法除了型砂可以再回用、有利于节省资源外,还可做到无公害和节能。所以,人们期待着该技术的尽早确立。该法是由英国发明的,在日本还处于基础研究阶段,但最近各方面已积极地展开以实用为目 There is increasing interest in the new casting process, the free-cooling method, as a convenient method of making high-level and complex castings. The law is to use liquid nitrogen and other refrigerants to freeze the sand, made of simple mold. The law in addition to sand can be reused, is conducive to saving resources, but also can be pollution-free and energy-saving. Therefore, people look forward to the establishment of the technology as soon as possible. The law was invented by the United Kingdom and is still in basic research stage in Japan. Recently, however, it has been active in all fields for practical purposes