Disc Grinding Device and Grinder Comprising the Same

Disc grinding device (2) with a stator disc (3) and a rotor disc (4) which are disposed coaxially with respect to a common disc axis and have at least approximately the same diameter, and the mutually facing sides of which correspondingly contain an annular toothed stator surface and an annular toothed rotor surface, wherein the annular toothed stator surface contains at least one stator ring region with stator teeth, which are spaced apart by stator grooves in the peripheral direction, and the annular toothed rotor surface contains at least one rotor ring region with rotor teeth, which are spaced apart by rotor grooves in the peripheral direction, wherein the toothed rotor surfaces and the toothed stator surfaces define an annular grinding gap and are disposed and formed in such a way that the grinding gap becomes narrower radially in the direction from the disc axis towards the edge of the stator disc (3) and rotor disc (4), wherein in particular in addition at least one of the following design arrangements is provided

• that the rotor teeth and rotor grooves extend in an inclined or curved manner with respect to the radial direction of the rotor disc (4) and in combination therewith the stator teeth and stator grooves extend pointing in the radial direction of the stator disc (3),
• and/or
• that at least two stator ring regions with stator teeth and/or rotor ring regions with rotor teeth lie adjacently in the radial direction of the stator disc (3) or rotor disc (4) respectively and have stator teeth or rotor teeth respectively and/or stator grooves or rotor grooves respectively of different designs, wherein
• such adjacent stator ring regions and/or rotor ring regions are preferably separated by a mixing zone peripheral groove, and/or
• preferably in such adjacent stator ring regions and/or rotor ring regions in a stator ring region or rotor ring region respectively lying radially further outwards in the direction from the disc axis towards the edge of the stator disc (3) and rotor disc (4), the stator grooves or rotor grooves respectively are narrower than in the stator ring region and/or rotor ring region lying adjacently further inwards radially thereto,
• and/or
• that the stator grooves and/or rotor grooves become narrower in the direction from the disc axis towards the edge of the stator disc (3) or rotor disc (4) respectively, i.e. in other words that the tooth arrangements become narrower radially from the disc axis towards the edge of the stator disc (3) and rotor disc (3).