Extrusion device having internal cooling

An extrusion device (100) with

• a material inlet (110) for feeding an extrusion material into the extrusion device (100);
• a material outlet (120), which is arranged opposite the material inlet (110) along an axis (x), in order to expel the extrusion material from the extrusion device (100);
• a material guidance system (115) for guiding the extrusion material from the material inlet (110) to the material outlet (120);
• a body (130), which is arranged on the axis (x) and is movable along the axis (x), which passes through the material outlet (120) and is designed in such a way that, as the body (130) moves along the axis (x), a cross-sectional area through which the extrusion material is expelled from the material outlet (120) changes;
• a drive device (140), arranged along the axis (x), for moving the body (130) along the axis (x);
• a cooling line system (150) for guiding coolant;
• characterized in that
• a first part (152) of the cooling line system (150) is arranged in the interior of the body (130) and is suitable for guiding the coolant along the axis (x);
• a second part (154) of the cooling line system (150) is suitable for guiding the coolant out of the body (130) away from the axis (x) and for conducting said coolant around the drive device (140);
• a third part (156) of the cooling system (150) is suitable for guiding the coolant outwardly into a discharge line (160) for the coolant at an incline to the axis (x);
• and
• the second part (154) of the cooling line system (150) adjoins the first part (152) of the cooling line system (150), and the third part (156) of the cooling line system (150) adjoins the second part (154) of the cooling line system (150) against a flow direction of the extrusion material from the material inlet (110) to the material outlet (120).