Hot press molding die, hot press molding apparatus, and hot press molding method

摘要

PPROBLEM TO BE SOLVED: To provide a die, an apparatus, and a method for hot press forming, by which die, apparatus, and method, a press formed product to be controlled in its strength can be obtained so as to have a strength stepwise changing at the boundaries of respective portions of the product. PSOLUTION: The die 2 forms a hot metallic plate material 1 by hot press forming, and controls the strength of the respective portions of the formed product by means of a cooling means and a heat insulating means provided in the die. The cooling means is composed of a plurality of refrigerant discharging ports 12 formed on the forming surface of the die, and refrigerant supply pipes 13 which are communicated with the refrigerant discharging ports 12 and are formed inside the die having a valve mechanism. The heat insulating means has first recessed portions 19 formed on the forming surface of the die. In addition, the refrigerant discharging ports 12 and the first recessed portions 19 are formed in close proximity such that the strength of the formed product to be controlled in the strength changes stepwise at the boundaries of the respective portions. PCOPYRIGHT: (C)2007,JPO&INPIT