Mold design system and computer-readable recording medium storing mold design program

A computer-readable recording medium which stores a mold design program for use in designing a mold for molding a product,

• the computer-readable recording medium causing a computer to function as:
• two-dimensional projection means for producing two-dimensional projection data by projecting edges of a product shape represented by three-dimensional graphic data onto a plane perpendicular to a mold opening direction;
• and
• parting line determination means for sequentially determining, out of candidate edges contiguous to a determined parting line already determined as parting line, a candidate edge forming a largest interior angle with said determined parting line at a contact point therewith on said two-dimensional projection data, as said parting line, whereby a parting line of said mold for molding said product shape is determined.