PROBLEM TO BE SOLVED: To ensure that the easy blueprinting of a molding die is performed. ;SOLUTION: Model data on a three-dimensional finished product comprising basic shape data on a three-dimensional mold corresponding to a finished product, element shape data Dc and attribute data thereof are read. Then the three- dimensional mold is split into nest shapes 21 and 22, each on the movable part side and the cavity side part side respectively, based on the model data on a three-dimensional finished product. Next, each of reverse shape data Dd, mechanical part shape data De and worked shape data Df corresponding to the element shape data Dc are arranged to at least either of the nest shapes 21 and 22 in accordance with a mounting reference and further, main mold pattern data Da are arranged to each of the nest shapes 21 and 22, of the movable part side and the cavity side part side, where the element shape data Dc are arranged. Besides, slide mechanism pattern data Db are arranged to each of the nest shapes 21 and 22, of the movable part side and the cavity side part side, where the element shape data Dc are arranged.;COPYRIGHT: (C)2003,JPO
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