Method for manufacturing corrugated flexible tube, apparatus for manufacturing the same, and corrugated flexible tube

摘要

PPROBLEM TO BE SOLVED: To provide a manufacturing method of a corrugated flexible pipe improved in flexibility and enhanced in productivity and product quality, despite a fact that a partition wall is provided, a manufacturing apparatus of the corrugated flexible pipe and the corrugated flexible pipe. PSOLUTION: A cylindrical uncured resin 4A for a pipe wall is continuously extruded from the first resin extrusion port 5A of the first die 5 arranged on the upstream side of a molding route part B1 and closely brought into contact with the half peripheral wall molding surfaces 3a and 3b of both split molds 3A and 3B to form the corrugated flexible pipe 1 having a large diameter pipe wall part 1A, a small diameter pipe wall part 1B and the side wall part 1C for connecting them. The resin 4B for the partition wall in an uncured state continuously extruded from the second resin extrusion port 6A formed to a second die 6 is fused or welded to the inner peripheral surface of the small diameter pipe wall part 1B or a region provided over the inner peripheral surface of the small diameter pipe wall part 1B and a part of the inner peripheral surface of the side wall part 1C continued thereto in a state traversing the inside of the corrugated flexible pipe 1 closely brought into contact with the half peripheral wall molding surfaces 3a and 3b and under an uncured state to form the partition wall 2 for demarcating the inside of the pipe. PCOPYRIGHT: (C)2008,JPO&INPIT