METHOD FOR DESIGNING OPTIMIZATION OF CROSSSECTION OF MOLDING

摘要

PROBLEM TO BE SOLVED: To easily design an optimum crosssectional shape by a method wherein hysteresis of change in temp. and deformation behavior of a crosssectional shape by external force of a molding during extrusion molding is simulated and the crosssectional shape is modified in such a way that an amount of deformation of the crosssection during integration of the molding to a plate-like body is held within a permissible value. SOLUTION: The initial crosssectional shape of a molding made of a resin extrusion- molded from a molding die is set 20 and based on external temp. condition 22 until the molding with this initial crosssectional shape is extruded from the molding die and is integrated on the peripheral edge of a plate-like body and physical values 24 related to heat of the extruded resin material, temp. of crosssection of the molding at a position for mounting the molding is calculated 26. Then, based on this temp. of the crosssection, mechanical physical values at the position for mounting the molding are calculated 28 and based on the obtained mechanical physical values and external force 31 acting on the molding, an amount of deformation of the crosssection at the position for mounting is calculated 30. Then, when the amount of deformation of the crosssection is within a permissible value, the crosssectional shape is determined and is outputted 35.