最近十几年来,树脂砂的应用不断得到推广。因而旧砂再生的问题就引起了世界各国铸造工作者的注意。这几年,美国、西德、日本和苏联等国的学者对旧砂再生的研究陆续发表了許多文献,現摘譯日本《铸鍛造》刊登的一种旧砂再生装置的基本原理。最近几年来,对旧砂再生方面的研究日益引起了人們的注意。这首先是因为砂子的成本在不断提高。其次;由于要把旧砂运走而产生了堆存场地的问题,而且把旧砂运到 In recent ten years, the application of resin sand has been continuously promoted. Therefore, the problem of regeneration of old sand has aroused the attention of casting workers all over the world. In recent years, scholars from the United States, West Germany, Japan and the Soviet Union have published many articles on the research of reclamation of old sand, and the basic principle of an old sand reclamation device published in Japan’s Casting and Forging is summarized. In recent years, research on the regeneration of old sand has drawn increasing attention. This is primarily because the cost of sand is constantly rising. Second, there was a problem of stockpiling due to the removal of old sand and the old sand was transported