一、绪言为了满足减轻机器重量及高速化的要求,各公司都尽力采用比强度(抗拉强度/比重)高、价格便宜的铝铸件,这些铝铸件现在也大量用作电子计算机、机器人等尖端产品的构件。但是,对于壁薄而形状复杂的铸件,以前的低压铸造技术不能胜任。也就是说,为了防 I. INTRODUCTION In order to meet the demands of reducing the weight and speed of machines, companies try their best to use aluminum castings with high specific strength (tensile strength / specific gravity) and low price. These aluminum castings are also widely used as cutting-edge devices for electronic computers, robots, etc. Components of the product. However, in the case of thin, complex shaped castings, previous low-pressure casting techniques were not adequate. In other words, to prevent