DEVICE FOR GRINDING OF WOOD-FIBER MATERIAL Russian patent published in 2010 - IPC D21B1/04 D21C1/00 

FIELD: woodworking industry.

SUBSTANCE: device for grinding of wood-fiber material comprises rotor, which is installed in body having loading cavity. Cavity communicates to working cavity, which is produced between internal surface of body and external surface of rotor. Rotor is equipped with drive, which comprises debalance vibrator, external surface of rotor and internal surface of body have conical shape, which expands in axial direction to the side of discharging nozzle. In working cavity there is a grinding section, where parallelism of two generatrices is provided: generatrix of internal surface of body and generatrix of external surface of rotor in zone of maximum approaching of these surfaces. In working cavity there is section available for preliminary crushing, which is installed upstream grinding section, and where width of gap between surface of body and surface of rotor reduces in axial direction to the side of discharging nozzle. Length L of grinding section is identified in the range of 41≥L≥l, where l is maximum length of processed material piece.

EFFECT: production of high quality raw materials for pulp and paper industry.

1 dwg, 4 ex