EPC is greatly superior to common sand mold casting in producing complicated engine four-cylinder block. Processibility analysis and mould cutting principle of cylinder block foam pattern were expounded. Mould cutting of cylinder block foam pattern finally adopted a technological scheme that was horizontal pattern combining with vertical pattern by comparative analysis

in which processibility

contraction and cementing negative was reasonably considered. Combined with parameterization modeling technology in Pro/E software

the foamed plastic pattern and mould design were synchronously performed with the decrease of designed time.