| 摘要 |
PROBLEM TO BE SOLVED: To provide a producing device for a resin pipe used for lining a steel pipe, in which in the case of heating and expanding the synthetic resin pipe and sticking the same on the inner peripheral surface of the metallic pipe, unevennesses for surely performing air vent are easily formed. SOLUTION: A recessed groove in the peripheral direction is formed on the outer peripheral surface of a press roll for contact-bonding an adhesive on the surface of a heat expandable synthetic resin pipe. Together with it, an O-ring, in which a part of the outer peripheral side is projected from the opening of the recessed groove, is fitted to the inside of the recessed groove. |
