自行设计了一款纪念币,分析了纪念币零件的结构、尺寸和工艺特点,对其制订了压铸生产工艺,并对其浇注和排溢系统进行分析研究,设计出了合理的压铸模结构。 A commemorative coin was designed by himself. The structure, size and technical characteristics of the commemorative coins were analyzed. The die-casting production process was established. The pouring and overflowing system was analyzed and the reasonable die-casting mold structure was designed.