1 前言随着工业技术的迅速发展,模具在工业和国民经济中的地位日趋提高,需求量不断增加。目前在国内外制造行业中,机动车辆零件。电气产品零件及塑料制品、消费用品等大都采用模具成型(其中塑料制品占80%,机电部件占70%)。据国际技术协会预测:到2000年,机器零件粗加工的75%、精加工的50%将由模具成型来完 1 Introduction With the rapid development of industrial technology, mold in the industrial and national economy has become increasingly higher status, increasing demand. Currently in the manufacturing industry at home and abroad, motor vehicle parts. Electrical products and plastic parts, consumer products are mostly used mold forming (of which 80% of plastic products, electrical and mechanical parts accounted for 70%). According to the International Association of Technical Forecasts: By 2000, 75% of the rough machining of machine parts, 50% of finishing will be finished by the mold forming