Response of Cavity Pressure to Vibration Parameters During VAIM Process

Summary In this study, a new type of vibration-assisted injection molding machine was introduced including the principle, structure and application. The responses of cavity pressure to the piston rod vibration amplitude and vibration frequency were discussed in detail. The cavity pressure oscillation frequency was the same with the piston rod frequency. The piston rod vibration frequency had little effect on cavity pressure oscillation amplitude. The cavity pressure oscillation amplitude increased with the increase of piston rod amplitude. The introducing of vibration forces field shortened the filling time, postponed the gate-frozen time and quickened the pressure build up process. More materials could be packed into the mold as the mean cavity pressure was higher which improved the quality of the products.