Method for manufacturing tube body made of fiber-reinforced resin

Patent metadata

Field	Value
Publication number	US-12296548-B2
Application number	US-202217932525-A
Country	US
Kind code	B2
Filing date	Sep 15, 2022
Priority date	Jun 26, 2020
Publication date	May 13, 2025
Grant date	May 13, 2025

Abstract

A method for manufacturing a tube body made of fiber-reinforced resin includes: an arranging step of arranging a fiber member on an outer peripheral surface of a mandrel made of resin by filament winding method; an inflating step of placing the mandrel with the fiber member arranged on it in a mold after the arranging step and inflating the mandrel by pressurizing an interior of the mandrel 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 with the resin and curing the impregnated resin to mold a tube body.

First claim

What is claimed is:

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.

2. The method according to claim 1 , wherein
after the molding step, the tubular member remains as a core material of the tube body.

3. The method according to claim 1 , wherein
before the arranging step, the method comprises a first connecting step of connecting a first connecting member to an end portion of the tubular member, and
in the arranging step, the fiber member is arranged on an outer peripheral surface of the first connecting member.

4. The method according to claim 3 , wherein
the mold has a space for filling the resin that is injected in the mold, at a connecting portion at which the tubular member and the first connecting member are connected, and
the resin filled in the space is sucked in the molding step to impregnate the fiber member with the resin.

5. The method according to claim 1 , wherein
in the arranging step, the fiber member is arranged by multiple filament winding method.

6. The method according to claim 1 , wherein
before the arranging step, the method comprises a second connecting step of connecting a second connecting member to another end portion of the tubular member, and
in the arranging step, the fiber member is arranged on an outer peripheral surface of the second connecting member.

7. The method according to claim 1 , wherein
in the inflating step, an interior of the tubular member is pressurized by flowing fluid inside the tubular member, and
the tubular member and the fiber member are heated by heat of the fluid.

8. The method according to claim 1 , wherein
the fiber member arranged in the arranging step has a non-crimp construction.

9. The method according to claim 2 , wherein
before the arranging step, the method comprises a first connecting step of connecting a first connecting member to an end portion of the tubular member, and
in the arranging step, the fiber member is arranged on an outer peripheral surface of the first connecting member.

10. The method according to claim 2 , wherein
in the arranging step, the fiber member is arranged by multiple filament winding method.

11. The method according to claim 3 , wherein
in the arranging step, the fiber member is arranged by multiple filament winding method.

12. The method according to claim 3 , wherein
before the arranging step, the method comprises a second connecting step of connecting a second connecting member to another end portion of the tubular member, and
in the arranging step, the fiber member is arranged on an outer peripheral surface of the second connecting member.

13. The method according to claim 3 , wherein
in the inflating step, an interior of the tubular member is pressurized by flowing fluid inside the tubular member, and
the tubular member and the fiber member are heated by heat of the fluid.

14. The method according to claim 3 , wherein
the fiber member arranged in the arranging step has a non-crimp construction.

15. The method according to claim 1 , wherein the tubular member is a mandrel.

16. 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
after the molding step, the tubular member remains as a core material of the tube body, and
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.

17. The method according to claim 16 , wherein
before the arranging step, the method comprises a second connecting step of connecting a second connecting member to another end portion of the tubular member, and
in the arranging step, the fiber member is arranged on an outer peripheral surface of the second connecting member.

18. The method according to claim 16 , wherein
in the inflating step, an interior of the tubular member is pressurized by flowing fluid inside the tubular member, and
the tubular member and the fiber member are heated by heat of the fluid.

19. The method according to claim 16 , wherein
the fiber member arranged in the arranging step has a non-crimp construction.

Assignees

• Hitachi Astemo Ltd

Inventors

• Nakayama Takahiro
• Mori Kenichi

Classifications

• B29L2023/00

  Tubular articles (B29L2024/00 takes precedence {; catheters B29L2031/7542}) · CPC title

• B29K2307/04

  Carbon · CPC title

• F16C3/026

  Shafts made of fibre reinforced resin · CPC title

• B29C70/48

  and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM] {, e.g. by vacuum} · CPC title

• B29C70/32

  on a rotating mould, former or core · CPC title