| 摘要 |
PURPOSE:To make it possible to easily form a bent part with a small radius of curvature by a method wherein a parison is inserted in the cavity of split mold main parts and the parison protruded from the lower end opening of the split mold main parts and finally pressurized fluid is forced in the parison in order to blow mold it. CONSTITUTION:The bent part with a small radius of curvature of a product is set so as to correspond to the joint of split mold main parts 5 and split mold lower parts 10 by using a pair of split molds 1 consisting of split mold main parts 5 and split mold upper parts 8 and split mold lower parts 10, both of which are just on the upper parts and the lower parts of the split mold main parts 5. A parison 13 is inserted in the cavity 4 of the split mold main parts 5 and, in addition, the parison 13, which is protruded from the lower end opening of the split mold main parts 5, is forcibly bent through the closing of the split mold lower parts 10 and, after that, pressurized fluid is forced in the parison 13 in order to blow mold it.
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