Press forming method

The invention discloses a punch forming method. A press molding method includes a molding step in which a target molded body (20) is formed by pressing an intermediate molded body (30) having an intermediate ridge portion (32) having a large edge radius, an upper mold (48) having an upper mold step portion (60) at a boundary portion between a product portion (22) and a discarded portion (24), the discarded portion (24) of the intermediate molded body (30) having a separation portion (56), a first contact portion (54), and a second contact portion (58), the separating part (56) is separated from the upper mold (48) at the initial stage of the forming process and provides stretching allowance for the discarded part (24); the first contact part (54) and the second contact part (58) are in contact with the upper mold (48) in the initial stage of the molding process to prevent wrinkles from being generated. Therefore, local extension of the discarding part and generation of wrinkles can be prevented at the same ti