Abstract: The object-oriented programming to establish parametric drawing base of plastic parts is used on the basis of analysis of ObjectARX formation and AutoCAD database in the paper. After drawing object of cooling method is analyzed, the data structure for the system is designed and drawing base of cooling methods established. It abstracts the non-formalized experience about the choice of cooling methods and use rule-based reasoning method enabling the system to search and output cooling layout which effective to the mould designers.

Key words: Cooling system, Drawing base, Knowledge expressing