Research on Structural Performance of Green Parts for Electromagnetic Dynamic Metal Power Injection Molding

Abstract:

An experiment was carried out on the blend of metal power 316L/binder under steady and dynamic molding conditions using the self-made electromagnetic dynamic injection machine DPII-90.The effects of vibration parameters on the uniformity and densification of metal power 316L/binder were studied.Results show that the density of green parts under dynamic molding conditions is obviously higher than under steady molding conditions.The increase of green parts's density is nonlinear under a given frequency(or amplitude) with the increase of amplitude(or frequency).The density decreases slightly as it reaches to a max value.The densification of green parts is better in the frequency range of 7 Hz~10 Hz and vibration amplitude range of 0.05 mm~0.15 mm.SEM showed that the change of uniform dispersion and distribution is basically accordant with the change of density with vibration amplitude(frequency).

Key words:metal power injection; electromagnetic dynamic; green parts; structural performance; 316L