US 12,233,576 B2
Method and apparatus for impregnating a fibre bundle and method and facility for producing a three-dimensional structure
Maik Titze, Hannover (DE)
Assigned to DEUTSCHES ZENTRUM FÜR LUFT- UND RAUMFAHRT E.V., Cologne (DE)
Appl. No. 17/438,111
Filed by DEUTSCHES ZENTRUM FÜR LUFT- UND RAUMFAHRT E.V., Cologne (DE)
PCT Filed Feb. 13, 2020, PCT No. PCT/EP2020/053806
§ 371(c)(1), (2) Date Sep. 10, 2021,
PCT Pub. No. WO2020/182407, PCT Pub. Date Sep. 17, 2020.
Claims priority of application No. 10 2019 106 355.8 (DE), filed on Mar. 13, 2019.
Prior Publication US 2022/0212369 A1, Jul. 7, 2022
Int. Cl. B29B 15/12 (2006.01); B29C 64/118 (2017.01); B29C 64/209 (2017.01); B29C 64/321 (2017.01); B29C 70/38 (2006.01); B29K 501/12 (2006.01); B33Y 10/00 (2015.01); B33Y 30/00 (2015.01); B33Y 40/10 (2020.01); B33Y 70/10 (2020.01)
CPC B29B 15/122 (2013.01) [B29C 64/118 (2017.08); B29C 64/209 (2017.08); B29C 64/321 (2017.08); B29C 70/382 (2013.01); B29K 2501/12 (2013.01); B33Y 10/00 (2014.12); B33Y 30/00 (2014.12); B33Y 40/10 (2020.01); B33Y 70/10 (2020.01)] 9 Claims
OG exemplary drawing
 
1. A method for impregnating at least one fiber bundle with a highly viscous plastics, comprising:
providing at least one fiber bundle to be impregnated, wherein the at least one fiber bundle is formed from a multiplicity of endless fibers, and providing a plastics material that attains a molten, highly viscous state at a predefined process temperature, and
impregnating the at least one fiber bundle with the plastics material by continuously guiding the at least one fiber bundle to be impregnated through an impregnation cavity which is filled with the plastics material in the molten, and highly viscous state at the predefined process temperature,
wherein, during the impregnation of the at least one fiber bundle, the plastics material located in the impregnation cavity is in contact with a surface of at least one vibration generator such that sound energy is introduced into the plastics material while the plastics material is in the molten, highly viscous state,
wherein a surface of the impregnation cavity is a surface of a structure having a natural vibration characteristic having real and/or complex eigenmodes, and
wherein the vibration generator is configured to induce the real and/or complex eigenmodes of the structure during the impregnation of the at least one fiber bundle, while the plastics material located in the impregnation cavity is in contact with the surface of the structure having the natural vibration characteristic having real and/or complex eigenmodes.