四、高压造型机高压造型机的研制工作,国外从五十年代初期就已开始,并且得到了较快的发展。最早进行研制的是美国、苏联和西德等国。美国比较著名的生产高压造型机的公司是Osborn和SPO公司。它们所生产的高压造型机,数量和品种都比较多,除了供应本国以外,还大量出口到西欧和日本。在美国,应用高压造型机 Fourth, high-pressure molding machine High-pressure molding machine research and development, foreign countries from the early 1950s has already begun, and has been rapid development. Developed first is the United States, the Soviet Union and West Germany and other countries. The more famous U.S. high-pressure molding machines are Osborn and SPO. They produce high-pressure molding machine, the number and variety are more, in addition to supply their own country, but also a large number of exports to Western Europe and Japan. In the United States, the application of high-pressure molding machine