金属型复砂铸造法是六十年代后期,七十年代初期发展起来的新工艺。在国外有金属模壳型铸造法、金属模挂砂铸造法等名称。它是在金属母型和金属型板间的空隙中射入热固性树脂砂,使金属型型腔的内壁复有4～8毫米厚的一层坚硬的壳型而命名的,它具有金属型和壳型铸造法的特点。由于金属型复砂生产球墨铸铁零件具有优质、高产、低消耗等许多优点,所以在一些主要资本主义国家如美、苏、德、日等都很重视该法生产,并获有专利。我国是由常州柴油机厂首先进行试验,我省永康拖拉机厂是在学习他们试验的基础上,于1975年下半年着手试验研究推广应用这项新工艺,通过一年来对S195柴油机球墨铸铁曲轴采用金属型复砂新工艺进行一系列的试验,其经济效果如下: Metal-type sand casting method is the late sixties, the early seventies developed a new technology. In foreign countries have a metal mold casting method, metal casting sand casting method name. It is the injection of thermosetting resin sand in the gap between the metal mother and the metal plate so that the inner wall of the metal cavity is covered with a hard shell with a thickness of 4 to 8 millimeters and named after it has a metal type and Shell casting method features. Due to its advantages of high quality, high yield and low consumption, the production of ductile iron parts made of metal-type compound sand places great emphasis on the production of the law in some major capitalist countries, such as the United States, the Soviet Union, Germany, Japan, and is granted a patent. Changzhou Diesel Engine Factory in our country is the first test, the province Yongkang Tractor Factory is to learn their experiments on the basis of the second half of 1975 to start the pilot study to promote the use of this new technology, through the year on the S195 diesel engine ductile iron crankshaft with metal Sand-type new technology for a series of tests, the economic results are as follows: