US 12,459,184 B2
Extruder screw for a multi-screw extruder
Daniel Gneuss, Charlotte, NC (US); Detlef Gneuss, Carabietta (CH); and Stephan Gneuss, Bad Oeynhausen (DE)
Assigned to Gneuss GmbH, Bad Oeynhausen (DE)
Filed by Gneuss GmbH, Bad Oeynhausen (DE)
Filed on May 16, 2023, as Appl. No. 18/198,063.
Application 18/198,063 is a continuation of application No. PCT/DE2021/100910, filed on Nov. 16, 2021.
Claims priority of application No. 10 2020 130 368.8 (DE), filed on Nov. 17, 2020.
Prior Publication US 2023/0278273 A1, Sep. 7, 2023
Int. Cl. B29C 48/435 (2019.01); B29B 7/48 (2006.01); B29C 48/25 (2019.01); B29C 48/38 (2019.01)
CPC B29C 48/435 (2019.02) [B29B 7/485 (2013.01); B29B 7/489 (2013.01); B29C 48/252 (2019.02); B29C 48/38 (2019.02)] 10 Claims
OG exemplary drawing
 
1. An extruder screw for a multi-screw extruder, the extruder screw comprising:
an intake and metering section;
a rotor body having an enlarger diameter relative to the intake and metering section;
a plurality of satellite screws positioned in an exposed manner on an outer periphery of the rotor body at least over part of the length thereof;
a cone and an adjoining drive zone formed between the intake and metering section and the rotor body, in which the drive zone and the satellite screws each engage via a drive pinion in an external toothing on the rotor body or in an internal toothing on a stator ring or in an inner wall of an extruder housing of the multi-screw extruder; and
at least one peripherally closed flow channel formed between that least two adjacent grooves for the drive pinions, whose flow channel extends from an inlet opening on the cone to an outlet opening located downstream of the drive pinons in a direction of flow, wherein the outlet opening is arranged downstream the drive pinions; and
wherein the flow channels are tubular with a triangular or trapezoidal cross-section over at least part the length thereof, and wherein in the cross-section one apex of the triangle or narrow side of the trapezoid points to the central axis of the support bearing element and the opposite base is located on the outer periphery of the support bearing element.