Aiming at two difficulties in designing die for engine chain cover such as shrinkage porosities easily generated in the cover as a result of forming difficulty in top pouring and warping deformation during machining large plane

numerical simulation was carried out by the Magma to determine rational gating system and present the hot spot position

deformed mode and parameters.Additionally

according to analysis

various ways including employment of hole position to increase squeeze pins

optimization of the arrangement of die thimble and water cooling

and balance of die wraping force

were applied to realize development of die casting die.The results demonstrate that the qualified rate of die casting engine cover reach up to above 96%

and the flatness of processing on lager plane can be controlled within 0.8 mm

decreasing the cost of die development.