PELLETISING SCREW EXTRUDER Russian patent published in 2014 - IPC B28B3/22 B29B9/10 B29C43/34 

FIELD: process engineering.

SUBSTANCE: proposed extruder can be used in various industries, for example, chemical industry (production of catalyst, sorbents, etc), food industry (production of mid products and dry concentrates), agriculture (production of mixed fodder, macro encapsulated seeds), woodworking, construction materials, machine building, etc. Said extruder is intended for processing of high-concentration polydisperse compositions of higher viscosity, limited shear strength and low adhesion. It consists of the housing accommodating the sleeve with trapezoidal ledges, their larger base being directed outward, filled with elastic inserts on its inner surface, screw and spinneret. Extruder sleeve ups the forming stability of superfine compositions without changing the riffled sleeve design, that is, decreases idle time caused by bulk fall from riffles at strained axial cross-section, i.e. gap between screw flange and housing riffled sleeve.

EFFECT: expanded range of used high-concentration polydisperse compositions of higher viscosity, limited shear strength and low adhesions.

5 dwg