Tube body intermediate

Patent metadata

Field	Value
Publication number	US-12429150-B2
Application number	US-202217884072-A
Country	US
Kind code	B2
Filing date	Aug 9, 2022
Priority date	Mar 19, 2020
Publication date	Sep 30, 2025
Grant date	Sep 30, 2025

Abstract

Provided is a tube body intermediate including: a carbon fiber disposed with respect to an outer circumferential surface of a mandrel so as to extend in an axial direction of the mandrel; and a fixing member having a tubular shape and disposed with respect to the outer circumferential surface of the mandrel so as to cover the carbon fiber. Also provided is a tube body production method including: disposing a fiber body with respect to an outer circumferential surface of a mandrel so that the fiber body extends in an axial direction of the mandrel; disposing a fixing member with a tubular shape with respect to the outer circumferential surface of the mandrel so that the fixing member covers the fiber body; and impregnating the fiber body with a resin on the outer circumferential surface of the mandrel and then heating the resin to mold the resin.

First claim

What is claimed is:

1. A tube body intermediate comprising:
a fiber body disposed with respect to an outer circumferential surface of a mandrel so as to extend in an axial direction of the mandrel; and
a fixing member with a tubular shape, the fixing member disposed with respect to the outer circumferential surface of the mandrel so as to cover the fiber body,
wherein an axial direction end portion of the mandrel has an exposed region where the fiber body is not disposed, and
wherein the fixing member extends to the exposed region.

2. The tube body intermediate according to claim 1 ,
wherein the fixing member is a film-like member wound in a circumferential direction by one or more turns.

3. The tube body intermediate according to claim 2 ,
wherein the fixing member is formed of a heat shrink member, which shrinks when heat is applied.

4. The tube body intermediate according to claim 1 ,
wherein the fixing member is formed of a heat shrink member, which shrinks when heat is applied.

5. A tube body intermediate comprising:
a fiber body disposed with respect to an outer circumferential surface of a mandrel so as to extend in an axial direction of the mandrel; and
a plurality of fixing members each with a tubular shape, the plurality of fixing members disposed with respect to the outer circumferential surface of the mandrel in a manner of being spaced apart in the axial direction of the mandrel so as to cover the fiber body,
wherein an axial direction end portion of the mandrel has an exposed region where the fiber body is not disposed, and
wherein at least one of the plurality of fixing members extends to the exposed region.

6. The tube body intermediate according to claim 5 ,
wherein the plurality of fixing members are each formed of a heat shrink member, which shrinks when heat is applied.

Assignees

• Hitachi Astemo Ltd

Inventors

• Nakayama Takahiro
• Mori Kenichi
• Ohta Kazuki

Classifications

• B29L2023/22

  Tubes or pipes, i.e. rigid (bent tubes not for use as pipe couplings B29L2023/004) · CPC title

• B29K2307/04

  Carbon · CPC title

• B29K2105/02

  heat shrinkable {(B29K2995/0049 takes precedence)} · CPC title

• B29C63/42

  using tubular layers or sheathings · CPC title

• B29C63/0073

  of non-flat surfaces, e.g. curved, profiled (B29C63/042 takes precedence) · CPC title