DEVICE AND METHOD FOR EXTRUDING PLASTIC PROFILES IN A ENERGY-EFFICIENT MANNER

摘要

The invention relates to an extrusion line for producing plastic profiles, preferably plastic tubes, comprising at least one extruder (1), a tool (2), a calibrator (3) and additional subsequent devices (4, 5). According to the invention, for cooling the profile (9), the tool (2) has a recess and/or a chamber (11) is arranged about the extruded pipe in order to be able to change the air counter to the direction of extrusion (7). The invention also relates to a method for extruding a plastic profile, in particular a plastic tube, in an energy-efficient manner, said method consisting of the following steps: a) the plastic is melted in an extruder (1); b) a plastic strand is formed and is fed to a tool (2); c) a plastic profile is formed by means of the tool (2) and d) the profile is calibrated and hardened by cooling in a calibrator (3). The profile (9) is externally cooled as well as internally cooled in the calibrator (3). According to the invention, air is suctioned counter to the direction of extrusion (7) for cooling the profile (9).