| 摘要 |
PURPOSE:To reduce a mold cost and forming cost by cutting a plate-shaped stock consisting of a superplastic material to a prescribed shape, joining the cut stocks and subjecting the same to superplastic blow molding. CONSTITUTION:The plate-shaped stock 10 consisting of the superplastic material is cut to the prescribed shape in the case of producing an air connector or the like. An Al superplastic alloy or steel superplastic alloy is used as the superplastic material in depending upon applications. Two sheets of such stocks 10 are superposed and both side edges 10A, 10B are joined to each other. The joined stock 10 is set in the mold of a superplastic blow molding device and after the mold is clamped, gas is blown into the mold to plastically deform the stock; thereafter, the molding is subjected to finishing. Since there is no need for a core, the mold cost is reduced. Since multi-stages of press forming are not carried out, the cost of the forming is reduced.
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