Patent ID: 8702410

Claim:
An extrusion line for producing plastic profiles, preferably plastic pipes, comprising at least one extruder, one die, one calibration means, and further following devices, at least the die has at least one aperture, and an extraction device is arranged in front of the die as viewed in the extrusion direction, by means of which extraction device air in the interior of the plastic profile can be exchanged, the die consisting of a plurality of functional regions with separate melt channels, by means of which the plastic melt can be divided into part melts and the temperature of the melt can be reduced and then recombining and fusing together, a chamber being arranged around the extruded pipe downstream from and sealed with respect to the calibration means, a fan being arranged on the chamber, by means of which fan air can be sucked in at an end of the chamber opposite to where the fan is arranged and guided past the outer wall of the extruded pipe counter to the extrusion direction for additional cooling, the chamber being downstream from the calibration means and after fusing between the part melts when recombined, the die comprising at least one shaping nozzle and one shaping mandrel, and the shaping nozzle being divided at the circumference into individual segments, each segment having both a heating device and a cooling device.