US 12,257,817 B2
Composite panel structure and method of manufacturing
Akio Kawamata, Kobe (JP); and Yoichi Nakamura, Kobe (JP)
Assigned to KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
Appl. No. 17/599,581
Filed by Kawasaki Jukogyo Kabushiki Kaisha, Kobe (JP)
PCT Filed Mar. 30, 2020, PCT No. PCT/JP2020/014554
§ 371(c)(1), (2) Date Sep. 29, 2021,
PCT Pub. No. WO2020/203971, PCT Pub. Date Oct. 8, 2020.
Claims priority of application No. 2019-067121 (JP), filed on Mar. 29, 2019.
Prior Publication US 2022/0161914 A1, May 26, 2022
Int. Cl. B29C 70/46 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01); B32B 15/02 (2006.01); B32B 15/20 (2006.01); B64C 1/06 (2006.01); B29K 101/12 (2006.01); B29K 105/08 (2006.01); B29K 307/04 (2006.01); B29L 31/30 (2006.01); B64C 1/00 (2006.01); B64U 20/65 (2023.01)
CPC B32B 5/02 (2013.01) [B32B 5/26 (2013.01); B32B 15/02 (2013.01); B32B 15/20 (2013.01); B64C 1/06 (2013.01); B29C 70/46 (2013.01); B29K 2101/12 (2013.01); B29K 2105/089 (2013.01); B29K 2307/04 (2013.01); B29L 2031/3076 (2013.01); B32B 2260/023 (2013.01); B32B 2260/046 (2013.01); B32B 2605/18 (2013.01); B64C 2001/0072 (2013.01); B64U 20/65 (2023.01)] 9 Claims
OG exemplary drawing
 
1. A method of manufacturing a composite panel structure, the method comprising:
forming a substrate material portion of the composite panel structure by using at least a matrix resin, the substrate material portion comprising a substrate portion;
laminating rib prepregs on the substrate material portion at a position corresponding to at least two ribs standing on the substrate portion and intersecting each other, wherein the rib prepregs are laminated to a height lower than a preset rib height, the rib prepregs are laminated along directions of the at least two ribs to form an additional lamination portion of the composite panel structure, the rib prepregs contain slit continuous fibers as reinforced fibers, and the slit continuous fibers are prepared by forming slits at continuous fibers oriented in one direction; and
subjecting the substrate material portion and the additional lamination portion to press-forming with a molding die.