| 摘要 |
PURPOSE: A multi-circular wire pipe and a molding device thereof are provided to overcome interference of a communication line due to an electromagnetic wave of a power line. CONSTITUTION: A melting resin pressed to a melting resin input hole(21) is extruded to a pipe through a mandrel(22) and a dice. A cooling device(30) is mounted to the mandrel. The cooling device cools an inner part of a synthetic resin pipe by cooling water supplied to a cooling tank through a cooling water pipe. A barrier forming part of a multi-circular wire pipe is formed to an inner side of the main pipe forming part. |
