On-demand Duplication of Medical In-Plant Metallic and Ceramic Parts by Newly Developed P/ M Process

提出了一种复杂形状金属和陶瓷零件按需复制技术。该工艺是将新型粉末压实技术与树脂复模技术相结合实现的。采用超临界气体浸渍技术，通过膨胀树脂模来补偿烧结过程中的收缩。壳型（即极薄型）模具埋式压实的研制，利用高速离心压实工艺实现了粉末的无缺陷压实。此外，这种壳型模具更容易通过热分解，从而使无疮的模具释放也是可能的。通过开发的工艺可以复制完美的氧化铝部件。

An On-demand Duplication Technology of Complex Shaped Metallic and Ceramic parts is Developed. This process is realized by combining new powder compaction technology and resin replica molding technique. The shrinkage during sintering is compensated by swelling resin mold by hyper-critical gas impregnating technique. The development of buried compaction of shell type(namely, very thin) molds realizes flaw-less powder compaction by High-speed centrifugal compaction process. Moreover, this shell type molds makes much easier to by thermally decomposition so that a sores-free mold release is also possible. Flawless alumina parts can be duplicated by the developed process.