Patent ID: 6722778
Filing Date: 2004-04-20
Classification: B29C

Abstract:
A method of extruding material, the method comprisingproviding an apparatus comprising at least one rotor and at least one stator, the rotor and stator comprising grooves, the rotor and stator surfaces facing each other having an outermost surface with a wavelike cross-section, and the rotor and stator grooves being so arranged that at the ridge of a wave, the depth of a groove reaches its maximum, and at the bottom of a wave, the depth of a groove reaches its minimum, and the bottom of the wave in the rotor is at the ridge of the wave in the stator and vice versa, extruding the material with the apparatus by rotating the rotor and causing the rotor and stator grooves to interact, the interacting grooves making the material to move through the apparatus by subjecting the material to move during extruding from a first rotor groove to a first stator groove, and from the first stator groove to a subsequent rotor groove and from the subsequent rotor groove to a subsequent stator groove.