HOT PRESS MOLDING METHOD, ARTICLE MOLDED BY HOT PRESS MOLDING, AND MOLD FOR HOT PRESSING

摘要

A hot press molding method for press-molding a heated material and cooling the material while the material is held in a mold, wherein during the hot pressing of the material, deformations including a part that curves relative to the longitudinal direction of the material are formed at both ends of the material in the longitudinal direction, thus imparting resistance to cooling-induced thermal contraction in the longitudinal direction. In one embodiment of the present invention, the deformations formed in the material during press-molding are small protrusions provided on the surface of both ends of the material in the longitudinal direction. The present invention makes it possible to suppress the thermal contraction of the material during cooling in hot press molding, and thereby prevent the defects associated therewith.