Double wall - corrugated pipe and the shaping jaw for a device for the production of such a double wall - corrugated tube.

摘要

Double wall - corrugated pipe with an outer tube (12), the alternating wave crests (16) and troughs (18), and with a smooth inner tube (14), wherein the wave troughs (18) of the corrugated outer tube (12) with the smooth inner pipe (14) is integrally connected to and between the corrugated outer pipe (12) and the smooth inner pipe (14) cavities (20) are formed, wherein at least two adjacent cavities (20) by at least one connecting channel (22) (so-called vent) are connected, on the inner side by the smooth inner pipe (14) and on the outside in each case by a body of the wave trough (18) bridging portion (24) of the corrugated outer tube (12) is limited, characterized in that the two mutually remote side of the end of the wave troughs of the corrugated outer tube (12) of the double wall - corrugated pipe (10) with the smooth inner pipe (14) along the circumference of the double wall - corrugated pipe (10) without a connecting channel under over the circumference of a constant cross section of the terminal wave trough formed closely and directly to one another preferably connected integrally in terms of material and thus the cavities (20) of the double wall - corrugated pipe (10) against the environment and are tightly closed...