| 摘要 |
PROBLEM TO BE SOLVED: To provide a method for molding a long shaft-like molded object so as to form a hollow part at the center part thereof. SOLUTION: In the method for molding the long shaft-like molded object 7, inert nitrogen gas is injected in a molten resin under pressure from the end part 7b, which corresponds to the end part of a center shaft, of the resin along the axial direction of the center shaft in order to mold a hollow part in the center shaft of the long shaft-like molded object 7.
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