Abstract: A method for producing a three-dimensional fiber-reinforced resin molded body by press-molding a heated and softened plate-like molding matrix using a mold, the method sequentially including: setting the matrix on a lower mold including a pad and mold main bodies by mounting a central portion of the matrix on the pad and supporting at least one end side of the matrix by at least one support protruding upward from a molding surface of at least one of the mold main bodies; bringing an upper mold and the lower mold close together to sandwich the central portion of the matrix by the pad and the upper mold; bringing the upper and lower molds still closer together to reduce the protrusion amount of the at least one support; and pressing the matrix by using the lower and upper molds to form the molded body.

Abstract: The invention provides a method of manufacturing a press formed product which reduces the welding time and enhances the productivity. First, a main steel plate and a reinforcement steel plate are bonded by laser welding a superposed portion of the main steel plate and the reinforcement steel plate to form a superposed blank member. This superposed blank member is heated to higher temperature than the austenite transformation temperature to transform the superposed blank member into austenite. The superposed blank member transformed into austenite is then press formed and rapidly cooled with dies at the same time to be transformed into martensite, thereby forming a press formed product.

Abstract: The invention provides a hot press machine which reduces the cooling time of a superposed member and enhances the productivity. A hot press machine of the invention includes a first die, a second die disposed on the first die, a first refrigerant flow passage for guiding a refrigerant into the first die or the second die, a plurality of grooves formed in a press forming surface of the first die or the second die, and a second refrigerant flow passage for guiding a refrigerant into the grooves. The hot press machine performs press forming and quenching by pressing a superposed member between the first die and the second die, the superposed member comprising a first steel sheet and a second steel sheet superposed and joined on the first steel sheet.

Abstract: The invention provides manufacturing a partially reinforced press formed product with high corrosion resistance and antirust property without grain boundary cracks due to spot welding. First and second galvanized steel plates are heated to an austenite range temperature to transform the bodies of the first and second galvanized steel plates into austenite and form a zinc oxide film and a Fe—Zn solid solution phase on the surfaces of the first and second galvanized steel plates. Hot press forming is then performed to the first and second galvanized steel plates which are heated in the process mentioned above, the first and second galvanized steel plates being superposed. The first and second galvanized steel plates, which are hot press formed, are then welded.

Abstract: The invention provides manufacturing a press formed product with high corrosion resistance and different tensile strengths depending on regions by a small number of processes. The whole of a steel plate having an aluminum-based plating film is heated to an austenite range temperature by a furnace, so that the body of the steel plate is transformed into austenite and a Fe—Al alloy layer is formed on the surface of the steel plate. The steel plate formed with the Fe—Al alloy layer is taken out from the furnace, a first region of the steel plate is heat-retained by a heat resistant and retaining member, and a second region of the steel plate is cooled naturally. When the temperature of the second region becomes lower than a ferrite transformation start temperature, hot press forming is performed to the steel plate to form a press formed product.

Abstract: The invention provides manufacturing a partially reinforced press formed product with high corrosion resistance and weldability. First and second steel plates having aluminum-based plating films are heated to an austenite range temperature by first and second furnaces, respectively, to transform the bodies of the first and second steel plates into austenite and form Fe—Al alloy layers on the surfaces of the first and second steel plates. Hot press forming is then performed to the first and second steel plates formed with the Fe—Al alloy layers, the first and second steel plates being superposed. The first and second steel plates, which are hot press formed, are then welded.

Abstract: The invention provides a hot press machine which reduces the cooling time of a superposed member and enhances the productivity. A hot press machine of the invention includes a first die, a second die disposed on the first die, a first refrigerant flow passage for guiding a refrigerant into the first die or the second die, a plurality of grooves formed in a press forming surface of the first die or the second die, and a second refrigerant flow passage for guiding a refrigerant into the grooves. The hot press machine performs press forming and quenching by pressing a superposed member between the first die and the second die, the superposed member comprising a first steel sheet and a second steel sheet superposed and joined on the first steel sheet.

Abstract: A method for producing a three-dimensional fiber-reinforced resin molded body by press-molding a heated and softened plate-like molding matrix using a mold, the method sequentially including: setting the matrix on a lower mold including a pad and mold main bodies by mounting a central portion of the matrix on the pad and supporting at least one end side of the matrix by at least one support protruding upward from a molding surface of at least one of the mold main bodies; bringing an upper mold and the lower mold close together to sandwich the central portion of the matrix by the pad and the upper mold; bringing the upper and lower molds still closer together to reduce the protrusion amount of the at least one support; and pressing the matrix by using the lower and upper molds to form the molded body.

Abstract: A press machine includes a lower die having a step portion for forming a bent portion on a side surface, a pad portion supported by a spring and disposed adjacent to the lower die in the horizontal direction, being movable upward and downward, an upper die disposed opposing the pad portion in the vertical direction, and a regulation portion. When the upper die moves downward and presses a steel plate between the upper die and the pad portion to form a bent portion in an edge portion of the steel plate, the regulation portion moves together with the upper die and regulates the motion of the edge portion of the steel plate protruding from the lower die in the horizontal direction, thereby preventing a wrinkle from forming in the edge portion of the steel plate.