GRINDER OF THE POLYMER MATERIALS Russian patent published in 2018 - IPC B29B13/10 B29B17/04 

FIELD: technological processes.

SUBSTANCE: invention relates to the field of polymeric materials processing by the method of volumetric deformational destruction and can be used in the preparation of dispersed powder from large granules of a thermoplastic polymer in the form of flakes or porous loose worm-shaped elements. polymeric materials grinder contains a horizontally mounted hollow body of cylindrical shape, divided for the material supply zone and the material fracture zone, having a through-hole for loading of the material and a through-hole for unloading of the material, shaft located in the housing along its axis and connected to the drive, an auger screw coaxially mounted on the shaft, and a rotor mounted on the shaft, providing a step-by-step destruction system controlled by gaps between the mating destruction surfaces. Rotor is mounted on the shaft coaxially to the axis of the shaft along the feed and destruction zones of the material with the possibility of reciprocating and vertical movement during the grinding process relative to the housing and is made of two parts continuously passing relative to each other. At that, the first part is made in the form of a multi-auger screw with sharp edges of the elements, which are made in the input part at an angle and in a clockwise direction, with a smooth transition to the second, the output part at an angle and in a counterclockwise direction. Second part is made in the form of a truncated cone, by a smaller base facing to the first part of the rotor. On the surface of the second part, notches are made at the same angle and in the same direction to the axis of the shaft as the angle of the multi-auger screw exit part. At that, the notches have a triangular shape in section. In the housing a stator is rigidly fixed, made in the form of a cylindrical bushing, which inner surface in the cross section is made in the form of two truncated cones interconnected by smaller bases, in the grinding process forming two zones of destruction together with the first and second parts of the rotor. At that, the first truncated cone is made with a toothed surface and with a length equal to the length of the first part of the rotor, the tops of the teeth are directed counterclockwise. Second truncated cone is made with notches of a triangular shape in the direction coinciding with the direction of notches in the rotor, and the length equal to the length of the second part of the rotor. Rotor to the associated with it stator surface is installed with gaps expanding to the ends of the rotor and stator. Housing end is closed with a replaceable removable plug, with the possibility of forming a chamber and regulating its volume, ensuring uninterrupted unloading of a porous material having a developed surface and a flakes or worm-like shape.

EFFECT: technical result is the production of loose porous elements having a high degree of adhesion to a porous filler such as thermally expanded graphite to produce an electrically conductive composite material and simplification of the design.

1 cl, 11 dwg