PRESS MOLDING METHOD

摘要

By compressing a compression section (B1) at the bottom wall of a cup shaped processed material (B) with an inner punch (11) and an inner die (14) and moving same in the direction away from a middle die (15) while pressing the inner die (14) toward the inner punch (11) and also compressing a compression section (B2) which is the outer edge of the processed material (B) in the radial direction with an outer punch (13) and an outer die (16) and moving same in the direction approaching the middle die (15) to limit the flow of processed material (B) at the compression section (B2) in the direction away from a central axis (10) thinning of the compression section (B1) and thickening of a vertical wall section (B3) of the processed material (B) that is interposed between a middle punch (12) and the inner die (14) and of a vertical wall section (B4) of the processed material (B) that is interposed between the middle punch (12) and the outer die (16) are performed.