US 12,214,558 B2
Core and method of forming structural body
Kenshirou Okumura, Kobe (JP); Takaya Hamamoto, Kobe (JP); and Toshikazu Sana, Kobe (JP)
Assigned to KAWASAKI JUKOGYO KABUSHIKI KAISHA, Kobe (JP)
Filed by Kawasaki Jukogyo Kabushiki Kaisha, Kobe (JP)
Filed on Oct. 12, 2022, as Appl. No. 17/964,095.
Application 17/964,095 is a continuation of application No. PCT/JP2021/015316, filed on Apr. 13, 2021.
Claims priority of provisional application 63/009,149, filed on Apr. 13, 2020.
Prior Publication US 2023/0029898 A1, Feb. 2, 2023
Int. Cl. B29C 33/76 (2006.01); B29C 33/48 (2006.01); B29C 70/30 (2006.01); B29C 70/46 (2006.01); B29C 70/54 (2006.01); B29K 305/12 (2006.01); B29K 307/04 (2006.01); B29L 31/30 (2006.01); B32B 5/02 (2006.01); B32B 5/26 (2006.01)
CPC B29C 70/30 (2013.01) [B29C 33/76 (2013.01); B29C 70/462 (2013.01); B29C 70/54 (2013.01); B29C 33/485 (2013.01); B29K 2305/12 (2013.01); B29K 2307/04 (2013.01); B29L 2031/3076 (2013.01); B29L 2031/3082 (2013.01); B32B 5/02 (2013.01); B32B 5/26 (2013.01); B32B 2260/023 (2013.01); B32B 2260/046 (2013.01); B32B 2262/106 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A core that is to be inserted into a space between a skin and a stringer in a step of integrally molding the skin and the stringer, the skin including fiber-reinforced resin, the stringer having a hat-shaped section that is open toward the skin,
the core comprising:
a first die that extends along a longitudinal direction of the stringer and contacts the skin;
a second die that extends along the longitudinal direction of the stringer, is adjacent to the first die, and contacts the skin; and
a third die that extends along the longitudinal direction of the stringer, is located at an opposite side of the skin across the first die and the second die, and contacts both the first die and the second die,
wherein:
in a sectional view perpendicular to the longitudinal direction of the stringer, a boundary between the first die and the second die is inclined relative to a direction along a perpendicular line of the skin,
the third die includes a main body having a rectangular shape in the sectional view,
contact between the first die and the third die is parallel to the skin,
contact between the second die and the third die is parallel to the skin, and
each of the first die, the second die, and the third die is divided in the longitudinal direction.