Single-screw extruder with hollow rotor member

A single-screw extruder (100), and a method. The extruder (100) comprises-a cylindrical rotor member (1) having diameter (D) and length (L) and comprising a feeding zone (14), -the rotor member (1) arranged in a barrel (2), -the cylindrical surface of the rotor member (1) carrying cavity/cavities and/or projection(s) (5) arranged in helically extending rows, -the helically extending row(s) of the rotor member (1) having a pitch (P) and depth (d) in the feeding zone (14) of the rotor member, and the extruder (100) further comprising a drive system (4) for the rotation of the rotor member (1) in the barrel (2). The relation of the depth (d) to the diameter (D) of the rotor member, i.e. d:D, is not more than 1:20, and the relation of the pitch (P) of the rotor member to the diameter (D) of the rotor member, i.e. P:D, is not more than 1:4.

Patent family as of 17.1.2022
CN109982822 A 20190705 CN201780051933 20170825      
CN109982822 B 20211224 CN201780051933 20170825      
EP3504042 A1 20190703 EP20170768824 20170825      
FI20165640 A 20180227 FI20160005640 20160826      
IN201917006673 A 20190503 IN201917006673 20190220      
JP2019528198 T2 20191010 JP20190510876T 20170825      
US2019184621 AA 20190620 US20170328022 20170825      
WO18037164 A1 20180301 WO2017FI50598 20170825

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