我们都知道粉末冶金工艺目前已经成为众多领域主流的成型工艺，其中应用非常广泛的就是MIM注射成型技术和PM压制成型技术，其中MIM更适合精密、复杂零件的成型与制造，PM相对于MIM精密度差一点，但是比传统的切割、数控、车床、注塑等技术来说还是要好很多。
We all know that powder metallurgy technology has become the mainstream of many fields, among which MIM injection moulding technology and PM compaction moulding technology are widely used. MIM is more suitable for the moulding and manufacturing of precise and complex parts. PM is a little less precise than MIM, but less precise than traditional cutting, numerical control, and pressing moulding technology. The technology of lathe and injection moulding is still much better.
预成形坯是MIM注射成型技术中粉末铸造非常重要的组成部分，依据需要生产的零件需求，然后进行的零件资料成分规划和选材、零件形状规划，然后再确定铸造的方式，所以铸造方式很重要
Preformed blank is a very important part of powder casting in MIM injection moulding technology. According to the requirement of parts to be produced, the component planning and material selection, part shape planning are carried out, and then the casting mode is determined. So the casting mode is very important.