Based on the features of more than 40 blades and existence of hole in center and indentation in side in AlSil2Cu pump wheel

maximum cross-section was set as parting surface

which is favorable for die-release and manufacturing

and J1125G horizontal cold chamber presser with closing force of 2500 kN was determined. In the die structure

side-pouring gatingsystem and over-flow-exhausting system as well as 31 ejection pins with various sectional shape have been considered. In addition

two-half ring-core and two side-core-pulling mechanisms have been designed due to the existence of ring-indentation.