To simply and certainly manufacture a double-wall corrugated pipe.
A thermoplastic resin is subjected to extrusion molding to manufacture the double-wall corrugated pipe 1c having an insection port 3 at one end thereof and a socket 2b at the other end thereof, and comprising an outer wall 6 having a continuous uneven shape and a cylindrical inner wall 7. This manufacturing method has at least a first cutting process for cutting a double- wall continuous pipe body 1a subjected to extrusion molding, in such a state that the socket 2b (2a) and the insertion port 3 are connected at the outer wall region X coinciding with the terminal region of the socket 2b, and at the outer wall region Y coinciding with the terminal region of the insertion port 3; and a second cutting process for inserting a cutting unit U into the double-wall single pipe body 1b obtained in the first cutting process up to a predetermined position from the opening part on the side of the socket 2a of the pipe body 1b toward the inner cavity 9 thereof, and applying a cutter Cz protruded from the cutting unit U to the inner wall region Z where the socket 2a starts to cut the inner wall 7 in the peripheral direction thereof.
HASEGAWA NOBORU
TSUGAWA DAISUKE
URABE YOJI
| JPS6034590A | 1985-02-22 | |||
| JPS61261020A | 1986-11-19 | |||
| JPS59111822A | 1984-06-28 | |||
| JPS6079936A | 1985-05-07 |