DISK-TYPE SCREW EXTRUDER Russian patent published in 2000 - IPC

FIELD: production of low- molecular products by destructive method. SUBSTANCE: proposed extruder contains feed cylinder with helical thread worm located inside it and connected with rotation drive and disk attachment with drive. Disks of attachment are made on common shaft in form of two-sided cones and/or truncated two-sided cones having similar and/or different angles of inclination relative to axis of shaft; disk attachment body and disk attachment form zigzag passage between them motion at similar or different amount of working clearance. EFFECT: possibility of producing low-molecular products from high-molecular compounds by mechanical or thermal action of high-molecular compound in viscous- flow state due to intensive shear deformation in disk attachment performed under conditions of motion of material via passage having complex configuration where melt-is repeatedly subjected to shear deformation. 2 cl, 1 ex, 1 tbl