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1. (WO2018037164) SINGLE-SCREW EXTRUDER WITH HOLLOW ROTOR MEMBER

Pub. No.:    WO/2018/037164    International Application No.:    PCT/FI2017/050598
Publication Date: Fri Mar 02 00:59:59 CET 2018 International Filing Date: Sat Aug 26 01:59:59 CEST 2017
IPC: B29C 47/60
B29C 47/38
B29B 7/42
B29C 47/66
Applicants: TEKNOLOGIAN TUTKIMUSKESKUS VTT OY
Inventors: MINKKINEN, Hannu
OJALA, Antti
IMMONEN, Kirsi
Title: SINGLE-SCREW EXTRUDER WITH HOLLOW ROTOR MEMBER
Abstract:
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 compris-ing- a drive system (4) for the rotation of the rotor member (1) in the barrel (2). The relation of the depth (d) to the diame-ter (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 di-ameter (D) of the rotor member, i.e. P:D, is not more than 1:4.