US 11,884,031 B2
Method for producing an extrudate
Martin Eichenhofer, Zürich (CH); Giovanni Cavolina, Zürich (CH); and Chester Houwink, Zürich (CH)
Assigned to 9T Labs AG, Zürich (CH)
Appl. No. 17/041,285
Filed by 9T LABS AG, Zürich (CH)
PCT Filed Mar. 27, 2019, PCT No. PCT/EP2019/000097
§ 371(c)(1), (2) Date Sep. 24, 2020,
PCT Pub. No. WO2019/185193, PCT Pub. Date Oct. 3, 2019.
Claims priority of application No. 10 2018 002 544.7 (DE), filed on Mar. 28, 2018.
Prior Publication US 2021/0107243 A1, Apr. 15, 2021
Int. Cl. B29C 48/34 (2019.01); B29C 70/86 (2006.01); B29C 48/154 (2019.01); B29C 48/25 (2019.01); B29C 70/50 (2006.01); B29C 70/52 (2006.01); B29C 70/74 (2006.01); B29C 70/78 (2006.01)
CPC B29C 70/86 (2013.01) [B29C 48/154 (2019.02); B29C 48/266 (2019.02); B29C 48/34 (2019.02); B29C 70/504 (2013.01); B29C 70/521 (2013.01); B29C 70/526 (2013.01); B29C 70/747 (2013.01); B29C 70/78 (2013.01)] 21 Claims
OG exemplary drawing
 
1. A method for producing an extrudate, the method comprising:
introducing a crude extrudate into a pultrusion unit;
deforming the crude extrudate in the pultrusion unit wherein, during movement of the crude extrudate through a pultrusion channel of the pultrusion unit, an outer side of the crude extrudate rests on at least one shaping wall of the pultrusion unit;
discharging the deformed crude extrudate from the pultrusion unit;
introducing the crude extrudate discharged from the pultrusion unit into an extrusion unit; and
deforming the crude extrudate in the extrusion unit and discharging the crude extrudate that has been reshaped to form the extrudate from an opening of the extrusion unit;
wherein during movement of the crude extrudate through the pultrusion channel, in a cross-section through the crude extrudate perpendicular to a movement direction of the crude extrudate in the pultrusion channel, a first portion of the outer side of the crude extrudate rests on at least one shaping wall of the pultrusion channel, and a remaining second portion of the outer side of the crude extrudate faces an open side of the pultrusion channel, and
in a section through the crude extrudate perpendicular to the movement direction of the crude extrudate in the pultrusion channel, the outer side of the crude extrudate rests on at least one shaping wall of the pultrusion channel during movement through the pultrusion unit, and a distance between a first shaping wall and a second shaping wall of the pultrusion channel is varied perpendicular to the movement direction of the crude extrudate in the pultrusion channel, so that a cross-sectional area available to the crude extrudate between the first and second shaping wall in the pultrusion channel is varied,
wherein the crude extrudate is deflected by at least one roller at an end of the pultrusion unit exerting a force on the crude extrudate in a direction from the outer side towards the shaping wall so that during the discharging, a tensile force is applied to the crude extrudate so that fibers in the pultrusion channel have a tensile force in the pultrusion unit, and so that during the discharging, the crude extrudate is oriented at an angle between 20° and 80° to a plane perpendicular to the movement direction of the crude extrudate in the pultrusion channel.