Extrusion head and method for producing an elongated hollow body by means of said extrusion head

A method for producing an elongated hollow body as an extrudate of an extrusion of extrusion material using an extrusion head;

• the extrusion head comprising a housing;
• a mandrel mounted in the housing;
• a mouthpiece arranged downstream of the mandrel in a direction of extrusion, wherein the mandrel includes an end-side mouthpiece section arranged in an opening of the mouthpiece so as to form a circumferential gap between the end-side mouthpiece section and an opening in the mouthpiece, wherein the mandrel is pivotable about at least one axis transverse to the direction of extrusion, and wherein the mandrel is mounted so as to be longitudinally movable in the direction of the at least one axis, so as to change a geometry of the circumferential gap, the method comprising:
• determining a deviation of an actual shape of the extrudate from a target shape of the extrudate, and adjusting the mandrel of the extrusion head to compensate for the deviation.