US 12,570,811 B2 · Method for producing fiber-reinforced resin article, and fiber-reinforced resin article

Abstract

The present invention provides a beneficial improvement relating to a method for producing a fiber-reinforced resin article at least partially having a hollow structure part. A method for a producing fiber-reinforced resin article according to the present invention includes a molding step of disposing, in a press mold, a prepreg preform including a core-containing part in which a fusible core comprising a wax material is disposed in an inner side, and heating the disposed prepreg preform to obtain a cured product having a hollow structure part and a core removal step of removing the fusible core from the cured product. In the prepreg preform, a through hole is formed in the core-containing part, and an elastomer stopper is inserted into the through hole.

Claims33

Dependent claims

A method for producing a fiber-reinforced plastic, the production method comprising:

providing a fusible core comprising a wax material,
disposing prepreg with a hole around the fusible core to form a prepreg preform with a through hole,
inserting an elastomer stopper in the through hole,
disposing in a press mold the prepreg preform containing the fusible core with the elastomer stopper in the through hole,
molding and heating the disposed prepreg preform to obtain a cured product containing the fusible core,
a core removal step of removing the fusible core from the cured product.

3 more elements

A method for producing a fiber-reinforced plastic, the production method comprising:

providing a fusible core comprising a wax material,
disposing prepreg with a first hole and a second hole around the fusible core to form a prepreg preform with a first through hole and a second through hole,
inserting a first elastomer stopper in the first through hole and a second elastomer stopper in the second through hole,
disposing in a press mold the prepreg preform containing the fusible core with the first elastomer stopper in the first through hole and the second elastomer stopper in the second through hole,
molding and heating the disposed prepreg preform to obtain a cured product containing the fusible core,
a core removal step of removing the fusible core from the cured product.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

18/369,968Filed 19 Sep 2023 · continuation

Priority

WO PCT/JP2021/01169022 Mar 2021

Published

US 2024/0002613 A14 Jan 2024

Granted

10 Mar 2026

Term ends

Not estimatedThe source records don’t support an estimate.

Classification15 codes

B29C 70/545
Component parts, details or accessories; Auxiliary operations , e.g. feeding or storage of prepregs or SMC after impregnation or during ageing:…
C08J 5/048
With mixed fibrous material: macromolecular compound to be reinforced also in fibrous form
B29C 33/52
With means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles: soluble or fusible
B29C 33/76
Moulds or cores; Details thereof or accessories therefor: cores

Method for producing fiber-reinforced resin article, and fiber-reinforced resin article

Life of this patent

Method for producing fiber-reinforced resin article, and fiber-reinforced resin article

Life of this patent

Abstract

Claims33