Patent ID: 8038088
Filing Date: 2011-10-18
Classification: B02C,B05C

Abstract:
1. A device for comminuting feedstock, the device comprising: a cutting tool; a first rotor; and at least one second rotor, the first rotor and the second rotor each being configured to rotate around a respective longitudinal axis with an opposite rotation direction than the other, wherein each rotor has a plurality of cutting discs that are arranged at an axial distance to one another, wherein the cutting discs of the first rotor are provided on gaps and with radial overlapping relative to the cutting discs of the second rotor, wherein the cutting discs, along their circumference, have support surfaces for accepting cutting tools, whose cutting edges move past one another over the course of the rotation of rotors thereby forming a cutting clearance, wherein to create a positive fit between the cutting tool and cutting disc, a positive fit groove, running in a plane of the cutting disc, is arranged to create a common contact surface between the cutting tool and cutting disc that varies in a direction parallel to an axis of rotation and perpendicular to the plane of the cutting disc, wherein at least one positive fit strip engages the positive fit groove, and wherein a width of the cutting tool is greater than the thickness of the cutting disc and an overhang of the cutting tool is inclined over the side surfaces of the cutting disc with the formation of an undercut to the cutting disc.