现代科学技术中的许多成果,已经或将要被古老的铸造工艺所采用。仅就铸造生产的主要工序——造型而言,先后出现了磁力造型、真空密封造型以及本文要介绍的冷冻造型等等。这些通过各种物理手段使松散的型砂紧实的方法,通称为物理造型。国外有人把物理造型看做是代表造型工艺发展过程的第三代。冷冻造型是将低温技术巧妙地应用于铸造中来的一个范例,最先是由英国布斯公司和英国氧气公司发明,不久便申请了冷冻造型法的专利。冷冻造型的问世,引起了人们浓厚的兴趣,它不仅为传统的砂型铸造工艺增加了一种新概念,而且具有简化工艺,节省材料,改善操作条件等显著效果。因此受到人们的重视,不断取得进展。 Many of the achievements of modern science and technology have been or are to be adopted by ancient foundry processes. Only the main process of casting production - modeling, there has been a magnetic modeling, vacuum sealing modeling and frozen shape to be introduced in this article and so on. These methods of compacting loose loose sand by various physical means are commonly known as physical forms. Some people abroad think of physical modeling as a representative of the third generation of modeling process development. Cryogenic modeling is an example of the skillful application of cryogenic technology to foundry, first invented by Booth and British Oxygen, and soon applied for a patent for the freeze-forming method. The advent of frozen modeling has aroused people’s keen interest. It not only adds a new concept to the traditional sand casting process, but also has the remarkable effect of simplifying the process, saving materials and improving the operating conditions. So by the people’s attention, continue to make progress.