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The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.

The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.

Patent No.:

US 8753469 B1

PDFFull Text
Date of Patent:
Jun. 17, 2014

Filed:

Mar. 19, 2008

Method of vacuum-assisted rtm

Applicants:

Shigeru Nishiyama, Aichi, JP;

Fumihito Takeda, Aichi, JP;

Hiroshi Odani, Ehime, JP;

Masumi Mizobata, Ehime, JP;

Inventors:

Shigeru Nishiyama, Aichi, JP;

Fumihito Takeda, Aichi, JP;

Hiroshi Odani, Ehime, JP;

Masumi Mizobata, Ehime, JP;

Assignees:

Toray Industries, Inc., , JP;

Mitsubishi Heavy Industries, Ltd., , JP;

Attorney:

DLA Piper LLP (US)

Primary Examiner:

Thomas Dunn

Assistant Examiner:

Matthew Hoover

Int. Cl.
CPC ...
B29C 47/06 (2006.01); B29C 65/00 (2006.01); B29C 53/80 (2006.01); B65H 81/00 (2006.01); B44C 3/08 (2006.01); B44C 5/04 (2006.01); B29C 47/00 (2006.01); B32B 7/04 (2006.01); B32B 37/00 (2006.01); B29C 45/00 (2006.01); B29C 43/10 (2006.01); B29C 49/00 (2006.01); B29C 47/76 (2006.01); B29C 67/00 (2006.01); B29C 70/44 (2006.01); B28B 7/30 (2006.01); D21J 3/00 (2006.01); B29C 39/02 (2006.01); B29C 43/02 (2006.01); B29C 49/08 (2006.01); B29D 22/00 (2006.01);
U.S. Cl.
CPC ...
Abstract

A method of vacuum-assisted RTM includes disposing a resin distribution medium on one surface of a reinforcing-fiber substrate, covering the whole with a bag material, reducing the pressure inside the bag material, and injecting a resin into the resin distribution medium to distribute the resin substantially in in-plane directions and then impregnate the resin into the reinforcing-fiber substrate in the thickness direction. The method is characterized in that the flow resistance of the resin distribution medium itself during resin distribution is changed in in-plane directions of the reinforcing-fiber substrate, in accordance with a difference in fiber weight per unit area or density between parts to be impregnated with resin of the reinforcing-fiber substrate present in a plane direction of the reinforcing-fiber substrate, or in accordance with a difference in distance from a resin impregnation initiation part to a resin impregnation completion part between parts to be impregnated with resin of the reinforcing-fiber substrate present in a plane direction of the reinforcing-fiber substrate.

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