Patent ID: 6296464
Filing Date: 2001-10-02
Classification: B29C

Abstract:
A molding device comprising an extrusion die and a calibrating device following the extrusion die in a direction of extrusion, the calibrating device comprising at least one calibrating die including a first calibrating die, the first calibrating die having a first end face and a second end face spaced therefrom in the direction of extrusion, and die faces extending between the end faces and terminating in terminal edges at the first end face, the die faces defining a die cavity for receiving an object to be extruded; a sealing device surrounding portions of the first end face extending from the terminal edges and a cavity being formed between the sealing device, an end face of the extrusion die and the first end face portions; means for forming a gap having a gap width of less than 1.0 mm between the first end face portions and the end face of the extrusion die; and a cooling device having a cooling passage immediately adjacent the terminal edges, the die faces and the first end face portions, the cooling passage extending over at least a part of the circumference of the die cavity for cooling a peripheral zone of the object and thereby to prevent adhesion thereof to the die faces.