Effects of Injection Temperature and Pressure on Green Part Density for Ceramic Injection Molding

摘要

This study investigates the effects of injection temperature and pressure on green part density. The high density of the green parts for the ceramic injection molding (CIM) process improves the material properties of the final product. In this study, the feedstock used was a combination of alumina and zirconia powders with a binder consisting of high density polyethylene, paraffin wax, and stearic acid. Powder loading was fixed at 57% volume. A standard screw-type injection molding machine was used to produce the green parts. The density of the green parts was measured using the Archimedes method. Experimental results show that a 160°C injection temperature and a 110 MPa injection pressure were the optimum parameters to achieve high density of the green parts. In addition, defect-free green parts were obtained.