APPARATUS FOR CASTING BLANK FOR SUPERPLASTIC FORMING AND TAKING OUT MOLDING

PROBLEM TO BE SOLVED: To provide a technique that can reduce a loss of thermal energy and can raise productivity in superplastic forming. SOLUTION: Blow molding is carried out with a left forming die 60 of Figure (a), and a next blank 71 is hung on a right arm member 33. In Figure (b), immediately after the blow molding has been finished, an upper die 62 is raised as indicated by arrows (4), the arm member 33 is entered into the forming die 60 as indicated by an arrow (5), and the blank 71 is dropped on a lower die 64 (arrows (6) in Figure (c)). Then a formed part 72 sticks to the upper die 62. Thus, a coolant gas is sprayed on a lower surface of the formed part 72 through balloon nozzles 34. The formed part 72 contracts with this forced cooling and is off the upper die 62, and is mounted on molding pedestal parts 35 of the arm member 33 (an arrow (7). As a result, cycle time can be shortened and the next blow molding becomes possible to be started before the forming die 60 gets cold.