The form of design the system and computer readable recording medium with the recorded the form of design program

摘要

It is intended to enable quick determination of an accurate parting line. Plane projection means (2) projects an edge of a product shape expressed by three-dimensional graphic data (1) onto a plane perpendicular to the opening direction of the mold, thus producing plane projection data (3). Parting line determination means (4) sequentially determines, as a parting line, a candidate edge having the largest interior angle at a contact with a deterministic parting line on the plane projection data, from among candidate edges adjacent to the deterministic parting line already determined as a parting line. Thus, a parting line (1a) of a mold for shaping the product shape expressed by the three-dimensional graphic data (1) is determined.