雰囲気加圧によるセラミックス射出成形プロセスの脱脂時間の短縮

抄録

The effects of the pressurized nitrogen atmosphere on the dewaxing time of injection molded Si₃N₄ green parts have been studied. As-molded parts of complex shapes, such as cutter blades and turbocharger rotors were used, and were dewaxed within one or two days at the heating rate of 10°-20°C/h in the pressurized (5kg/cm²G) nitrogen gas atmosphere. On the other hand, dewaxing needed 6-20 days by the conventional method with the non-pressurized condition because of the limited heating rate of 1°-3°C/h. The extensive reduction in dewaxing time is explained in terms of the prevention of binder boiling and control of evolved gas volume.