Unmoldability determination apparatus, computer readable medium, and unmoldability determination method

Abstract

An unmoldability determination apparatus includes: a normal line calculation unit that calculates a normal line extending from a point on the surfaces of a three-dimensional shape of a molded product; an opposite direction component determination unit that determines whether the normal line calculated on each surface has a directional component opposite to a mold release direction of a mold of the molded product; a reach determination unit that determines whether there is another surface on the molded product which either a line extending from a projection surface in the mold release direction or a line opposite to the mold release direction reaches; and an unmoldability determination unit that, when there is another surface which both lines extending from the projection surface reach, determines the projection surface to be unreleasable from the mold by moving the mold in the mold release direction, thus determining the projection surface to be unmoldable.