The die for die casting with many side holes is alwasys very complex because it has many cores to be drawn out

so everything in its design must be considered very carefully to simplify the structure of the die

thus to avoid the problem in use. Considering the problems of simplifying the structure of castings

drawing-out cores by large angle in stationary mould

drawing-out cores through an inside block in moving mould

drawing-out cores with a long distance

the design in this paper makes the complex die have high reliability.