Effects of processing parameters on filling process in low pressure casting have been investigated by hydraulic simulation. It was revealed that with increasing the pressure-applying rate

the fluctuation of liquid surface is increased

while it is decreased with increasing the dynamical viscosity. In addition

with increasing the applying-pressure rate

the lifting-delay time of liquid surface can be raised regardless of how large of area of exhausted-pipe line. Increasing the anti-pressure in the cavity area and exhausted-pipe line section would extend the lifting-delay time of liquid surface

however

the very small section area is obviously detriment of filling process.