| 摘要 |
PROBLEM TO BE SOLVED: To provide a manufacturing method of polymer insulator tubes by which polymer tubes are manufactured through a lessened number of processes while eliminating vain use of an insulating polymer material and at the same time by which polymer tubes with improved resistance to stains are manufactured. SOLUTION: This manufacturing method is carried out by setting a core material in a die of a pair of die blocks 6-1, 6-2 respectively constituted of a plurality of segments 2-1, 2-2, pouring an insulating polymer material into the cavity of the die, and curing the polymer material to form an outer coating of a polymer insulator tube. In this case, shock absorbing members 11-1, 11-2 having elasticity are installed in either one or both of butting faces of the pair of the die blocks 6-1, 6-2 and then the pair of the metal blocks 6-1, 6-2 are united to give the die. |
