ANALYTICAL METHOD FOR THERMAL DEFORMATION OF INJECTION- MOLDED ARTICLE

摘要

PROBLEM TO BE SOLVED: To provide an analytical method, for the thermal deformation of an injection-molded article, which can easily deal with a change in the shape or the molding condition of the injection-molded article and in which the thermal deformation including a heating shrinkage characteristic can be analyzed with high accuracy. SOLUTION: The analytical method is provided with an in-temperature-rise deformation calculation step S2 in which the elastoplastic deformation of the injection-molded article is calculated on the basis of the elastoplastic deformation characteristic of the article when the temperature of the article is raised up to a prescribed temperature, a creep-deformation calculation step S3 in which the creep deformation of the article is calculated on the basis of the creep characteristic of the article when the article is placed at the prescribed temperature for a prescribed time and an in-temperature-drop deformation calculation step S4 in which the elastoplastic deformation of the article is calculated on the basis of the elastoplastic deformation characteristic of the article when the temperature of the article is dropped from the prescribed temperature. A calculation by which the thermal shrinkage deformation of the article is analyzed on the basis of the thermal shrinkage percentage of the article corresponding to a molding temperature at a time when the article is taken out from a mold is built in the step S4.