| 摘要 |
PROBLEM TO BE SOLVED: To easily mold a resin pipe excellent in surface properties and dimensional accuracy. SOLUTION: A plasticized resin composition is injected in the hollow part 11S of a monolithic mold main body 11 having the columnar hollow part 11S and inert gas such as nitrogen gas or the like is injected in the columnar hollow part 11S from the gas injection port 16S of a gas nozzle 16 at the time of injection of the resin composition and the injected resin composition is spread to mold the resin pipe 20 having a hollow part 21 formed therein. |
