DEVICE FOR POWDER PREPARATION FROM POLYMER MATERIAL Russian patent published in 2008 - IPC B29B13/00 

FIELD: technological processes.

SUBSTANCE: invention is related to the field of materials grinding, namely to devices for preparation of dispersed polymer material and may be used for grinding natural and synthetic polymer materials. Device for powder preparation includes tightening chamber and grinding chamber in the form of cylindrical casings with loading and discharging openings. Inside the tightening chamber tightening auger is installed with spiral grooves on the surface, the depth of which is made as gradually reducing to the discharging opening. In grinding chamber that is equipped with cooling facilities milling rotor is installed with creation of annular gap in respect to internal surface of the casing. Tightening chamber casing is installed perpendicularly to the grinding chamber casing and is hermetically connected with its discharging opening to its inlet opening that is installed in the middle part of grinding chamber. Grinding chamber has two discharging nozzles installed in the opposite ends of its casing. On the side surface of milling rotor spiral grooves are made, which are cut from rotor centre to its ends in the opposite direction. Milling rotor may be made with annular deepening that is installed in its central part in the zone of grinding material supply from tightening chamber.

EFFECT: permits to increase efficiency of powder production process with preservation of high quality of grinding.

7 cl, 4 dwg, 1 tbl, 5 ex