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1 工艺介绍及流程 金属粉末注射成型工艺技术(通常简称MIM技术)是传统的粉末冶金工艺与热塑性工程塑料注射成型工艺相结合的新工艺,它把这两项工艺的优势集中于一身。 该工艺的基本过程是:金属粉末与有机粘接剂均匀混合成具有流变性的膏状混合物并形成粒料,然后在注射机上注射成型,所得到的成型坯经脱除粘接剂后进行烧结,产生一定收缩而达到致密化。烧结后的零件可根据需要进行后处理:整形、打磨、表面硬化、淬火、回火等。
1 process introduction and process metal powder injection molding technology (commonly referred to as MIM technology) is a traditional powder metallurgy technology and thermoplastic engineering plastics injection molding process combines the new technology, which combines the advantages of both processes in one. The basic process of the process is that the metal powder and the organic binder are homogeneously mixed into a paste mixture with rheological properties to form a pellet, which is then injection-molded on an injection molding machine, and the obtained preform is sintered after removing the adhesive , Produce a certain contraction and achieve densification. After sintering parts can be post-processed as needed: plastic, grinding, surface hardening, quenching, tempering and so on.