US 12,479,171 B2
Fiber-reinforced resin hollow molded body and method for producing same
Hayato Iio, Osaka (JP); Naoya Takano, Osaka (JP); Yoichi Hiraishi, Osaka (JP); Tadaharu Tanaka, Osaka (JP); Yuta Nakame, Osaka (JP); and Yuki Komai, Osaka (JP)
Assigned to Kurashiki Boseki Kabushiki Kaisha, Okayama (JP)
Appl. No. 17/786,907
Filed by KURASHIKI BOSEKI KABUSHIKI KAISHA, Kurashiki (JP)
PCT Filed Dec. 8, 2020, PCT No. PCT/JP2020/045616
§ 371(c)(1), (2) Date Jun. 17, 2022,
PCT Pub. No. WO2021/124977, PCT Pub. Date Jun. 24, 2021.
Claims priority of application No. 2019-229732 (JP), filed on Dec. 19, 2019.
Prior Publication US 2023/0021569 A1, Jan. 26, 2023
Int. Cl. B29C 70/34 (2006.01); B29C 70/20 (2006.01); B29C 70/54 (2006.01); B32B 1/08 (2006.01); B32B 5/10 (2006.01); B32B 5/12 (2006.01); B32B 37/04 (2006.01); B32B 37/24 (2006.01); B32B 38/00 (2006.01); B32B 38/18 (2006.01); B29K 23/00 (2006.01); B29K 307/04 (2006.01); B29L 22/00 (2006.01)
CPC B29C 70/342 (2013.01) [B29C 70/205 (2013.01); B29C 70/545 (2013.01); B32B 1/08 (2013.01); B32B 5/10 (2013.01); B32B 5/12 (2013.01); B32B 37/04 (2013.01); B32B 37/24 (2013.01); B32B 38/0004 (2013.01); B32B 38/1808 (2013.01); B29K 2023/12 (2013.01); B29K 2307/04 (2013.01); B29K 2995/0097 (2013.01); B29L 2022/00 (2013.01); B32B 2250/20 (2013.01); B32B 2260/023 (2013.01); B32B 2260/046 (2013.01); B32B 2262/106 (2013.01); B32B 2305/073 (2013.01); B32B 2305/54 (2013.01); B32B 2307/718 (2013.01); B32B 2307/732 (2013.01); B32B 2307/738 (2013.01); B32B 2309/105 (2013.01); B32B 2313/04 (2013.01); B32B 2323/10 (2013.01); B32B 2597/00 (2013.01)] 7 Claims
OG exemplary drawing
 
1. A method for manufacturing a fiber reinforced resin hollow molded body,
wherein, in the manufacturing of the fiber reinforced resin hollow molded body, a resin-integrated fiber sheet is used,
the resin-integrated fiber sheet comprises:
a fiber sheet comprising unidirectional continuous fibers that are spread fibers of a continuous fiber group and arrayed unidirectionally in parallel; and
thermoplastic resin that is present at least on part of a surface of the fiber sheet comprising the unidirectional continuous fibers, and
the resin-integrated fiber sheet is a semipreg in which the thermoplastic resin in a powder form that serves as a matrix of the fiber reinforced resin hollow molded body adheres to the surface of the fiber sheet comprising the unidirectional continuous fibers through thermal fusion,
the method comprising:
winding a stack of a plurality of the resin-integrated fiber sheets around a surface of an elastic body to produce a wound body having an overlapping portion, the stack including the resin-integrated fiber sheet being oriented with its unidirectional continuous fibers at 0° with respect to a length direction of the elastic body;
placing the elastic body wound with the stack of the plurality of the resin-integrated fiber sheets in a heated mold having a hollow shape; and
performing pressure molding by supplying pressure fluid into the elastic body and melting the thermoplastic resin to impregnate the thermoplastic resin in the entire fiber sheets comprising the unidirectional continuous fibers in order to consolidate the wound resin-integrated fiber sheets.