Extrusion device and method for producing plastic hollow profiles having at least one hollow chamber space that is filled with foam

In a method for producing plastic hollow profiles with at least one hollow chamber that is filled with foam, said method comprising:

• (1) extruding a plastic hollow profile using a profile tool at a discharge speed VA;
• (2) cooling the plastic hollow profile as it moves forward at the discharge speed VA;
• (3) directing a foam lance into the hollow chamber, with the foam lance tip positioned in an area of the plastic hollow profile, the temperature of the section of the plastic hollow profile surrounding the foam lance tip being cooled to a foam temperature TA;
• (4) injecting a reactive mixture made up of at least one foaming component into the hollow chamber with a foam substance temperature TS and foaming in a plastic isolating foam body by means of the continuous recalibration and recooling of the outer side of the plastic hollow profile;
• the improvement wherein the plastic hollow profile extruded out of the profile tool is taken off on a track which is slanted downward with an angle α in the range of 1-10° with respect to the horizontal.