US 12,186,975 B2
Method and extrusion apparatus for extrusion of fiber-reinforced plastic material for the additive manufacture of a component
Vincent Morrison, Krakow am See (DE); Clemens Lieberwirth, Rostock (DE); René Zielke, Rostock (DE); Robert Radon, Rostock (DE); and Tim Weidner, Rostock (DE)
Assigned to AIM3D GmbH, Rostock (DE)
Appl. No. 17/633,375
Filed by AIM3D GmbH, Rostock (DE)
PCT Filed Aug. 8, 2019, PCT No. PCT/EP2019/071342
§ 371(c)(1), (2) Date Feb. 7, 2022,
PCT Pub. No. WO2021/023389, PCT Pub. Date Feb. 11, 2021.
Prior Publication US 2022/0288842 A1, Sep. 15, 2022
Int. Cl. B29C 64/106 (2017.01); B29C 64/209 (2017.01); B29C 64/295 (2017.01); B29C 64/314 (2017.01); B29C 64/321 (2017.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 40/10 (2020.01); B29C 48/02 (2019.01); B29C 48/05 (2019.01); B29C 48/25 (2019.01); B29C 48/285 (2019.01); B29C 48/30 (2019.01); B29C 48/395 (2019.01); B29C 48/625 (2019.01); B29C 48/68 (2019.01); B29C 48/797 (2019.01); B29C 48/80 (2019.01); B29C 64/118 (2017.01); B29C 64/393 (2017.01); B29K 101/12 (2006.01); B29K 105/12 (2006.01); B29K 309/08 (2006.01); B33Y 50/02 (2015.01); B33Y 70/10 (2020.01)
CPC B29C 64/106 (2017.08) [B29C 64/209 (2017.08); B29C 64/295 (2017.08); B29C 64/314 (2017.08); B29C 64/321 (2017.08); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/10 (2020.01); B29C 48/02 (2019.02); B29C 48/05 (2019.02); B29C 48/25 (2019.02); B29C 48/285 (2019.02); B29C 48/30 (2019.02); B29C 48/395 (2019.02); B29C 48/625 (2019.02); B29C 48/68 (2019.02); B29C 48/797 (2019.02); B29C 48/80 (2019.02); B29C 64/118 (2017.08); B29C 64/393 (2017.08); B29K 2101/12 (2013.01); B29K 2105/12 (2013.01); B29K 2309/08 (2013.01); B33Y 50/02 (2014.12); B33Y 70/10 (2020.01)] 19 Claims
OG exemplary drawing
 
1. A method for extrusion of fiber-reinforced plastic material for additive manufacture of a component comprising:
supplying a fiber-reinforced plastic material to an extrusion apparatus;
heating the fiber-reinforced plastic material in a heating zone of the extrusion apparatus;
supplying the heated fiber-reinforced plastic material to an extrusion nozzle of the extrusion apparatus, at which a material thread including the fiber-reinforced plastic material is extruded for a component to be manufactured; and
conveying the fiber-reinforced plastic material through the heating zone via a screw conveyor of the extrusion apparatus, wherein the screw conveyor has a length-diameter ratio of less than 10;
wherein:
in the heating zone, a maximum of 5.5 cm3 of volume is provided for the fiber-reinforced plastic material and a rotational speed of the screw conveyor is limited to a maximum of 30 revolutions per minute;
the fiber-reinforced plastic material is supplied to the screw conveyor at a feed zone of the extrusion apparatus;
the extrusion apparatus further comprises a barrier zone that, in a conveying direction of the fiber-reinforced plastic material, follows the feed zone to spatially separate the feed zone from the heating zone;
the barrier zone is formed by a first housing portion made of a first material that has a lower thermal conductivity than a second material from which a second housing portion is made, the second housing portion adjoining the barrier zone and at least partly forming the heating zone; and
the second housing portion at least partly forming the heating zone has a larger thermal mass than the first housing portion forming the barrier zone.