Abstract
We aim to develop a new powder metallurgy process for producing next generation common-rail diesel nozzles having tiny and multiple holes. In the process, a resin core which makes tiny holes in the products is combined with the high-speed centrifugal compaction process (HCP). Powder can be filled up to all the corners of complicated shaped molds by the HCP. Moreover, during the HCP, only isotropic hydrostatic pressure is applied to a resin core, so that, the core is buried in a green compact without collapse even if the core has scarce strength. A resin core is removed by thermal decomposition method. A nozzle sample with tiny multiple holes are successfully produced by this process.
