| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly productive hydraulic molding device by preventing the leak of a molding medium to reduce the loss of materials. SOLUTION: Overlapped plate material 8 is restrained under the pressure between an upper mold 11 and a lower mold 12. A nozzle receiving part 9 is formed beforehand at both ends of the overlapped plate material 8, and an injection nozzle 16 is press-fitted into each nozzle receiving part 9 to mold respective injection holes 7 first. The end faces 26 of the molded injection holes 7, and the ironed surfaces 24 and the vertical wall surfaces 25 of the injection nozzles 16 are firmly stuck to each other and are sealed up. In this state, a liquid molding medium is supplied from the injection nozzles 16 into the space between the upper and lower plates 2, 3 of the overlapped plate material 8, which is then molded into a prescribed shape by expanding the liquid molding medium. Upon executing the expansion molding, a die pressure W applied by the upper and lower molds 11, 12 is put under a positive and variable control interlocking with a medium pressure P. COPYRIGHT: (C)2003,JPO
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