在伟大领袖毛主席的“独立自主、自力更生”伟大方针指引下,在各级领导和上塑七厂等兄弟单位大力支持下,我们组成了泡沫塑料模实型铸造小组,经过几年的试验,初步获得成功,并于1966年底在铸钢件上投入小批生产。几年来已浇注合格铸件400多吨,最大铸件毛重70吨。 1965年底,当我们接到试验任务时,困难是很大的。我们这些人从未接触过高分子化合物,缺少资料,也没有象国外所介绍的加工泡沫塑料的高速铣床。但我们有战无不胜的毛泽东思想领航,没有被困难所吓倒。试验一开始,首先碰到的是泡沫塑料模的成型和加工问题,当时认为,泡沫 Under the guidance of Chairman Mao’s great principle of “independence and independence, self-reliance” by great leaders, with the support of leaders at all levels and brother units such as Shangsiu Factory, we formed a foam-plastic mold-making foundry group. After several years of trial, Success, and in the end of 1966 cast steel parts in small batch production. Over the past few years have cast more than 400 tons of qualified castings, the largest casting 70 tons gross weight. At the end of 1965, the difficulties were great when we received the test mission. These people of ours have never come in contact with macromolecular compounds, lack information, and do not have the high-speed milling machines that we have developed to process foams abroad. However, we are leading the invincible Mao Tse-tung’s thought and have not been intimidated by the difficulties. At the beginning of the experiment, the first problem encountered was the molding and processing of foam molds. At that time,