US 12,296,548 B2
Method for manufacturing tube body made of fiber-reinforced resin
Takahiro Nakayama, Ibaraki (JP); and Kenichi Mori, Ibaraki (JP)
Assigned to HITACHI ASTEMO, LTD., Ibaraki (JP)
Filed by Hitachi Astemo, Ltd., Ibaraki (JP)
Filed on Sep. 15, 2022, as Appl. No. 17/932,525.
Application 17/932,525 is a continuation of application No. PCT/JP2020/025393, filed on Jun. 26, 2020.
Prior Publication US 2023/0173771 A1, Jun. 8, 2023
Int. Cl. B29C 70/44 (2006.01); B29C 70/32 (2006.01); B29C 70/54 (2006.01); B29K 307/04 (2006.01); B29L 23/00 (2006.01)
CPC B29C 70/541 (2013.01) [B29K 2307/04 (2013.01); B29L 2023/00 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A method for manufacturing a tube body made of fiber-reinforced resin comprising:
an arranging step of arranging a fiber member on an outer peripheral surface of a tubular member made of resin by filament winding method;
an inflating step of placing the tubular member with the fiber member arranged on it in a mold after the arranging step and inflating the tubular member by pressurizing an interior of the tubular member with the fiber member arranged on it; and
a molding step of supplying resin in the mold after the inflating step to impregnate the fiber member arranged on the outer peripheral surface of the tubular member with the resin and curing the impregnated resin to mold a tube body, wherein
before the arranging step, the method comprises a tubular member molding step using a mold having recesses provided in an inner surface of the mold, in which step the tubular member with projections corresponding to the recesses formed on its outer peripheral surface is formed.