US5433915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Manufacturing method of composite articles from prepregs which avoids internal defects
Assignee: Kawasaki Motors Ltd
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Filing: 1993-08-27
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Granted: 1995-07-18
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Expires: 2013-08-27
Abstract
Abstract A manufacturing method of composite articles is provided by which it is possible to constantly mold thick composite articles as primary structure component parts for aircraft, such as rotor hubs of helicopters, which are highly accurate in dimensions and have a favorable internal quality with no internal defects such as molding cracks, voids and so forth. Therefore, this manufacturing method of composite articles includes the steps of laying up resin-impregnated reinforcing fiber materials in a molding cavity within a molding jig of a matched die type, evacuating the interior of the molding jig so that the resin-impregnated reinforcing fiber materials are under reduced pressure and thereafter closing and heating the dies of the molding cavity, causing the resin to overflow from the laid up materials into a trap located remote from the molding cavity, and molding the laid up materials inside of the molding jig.
Inventors
- 👤 Tatsuya Yamamoto
- 👤 Shinichi Shimizu
- 👤 Shunichi Bandoh
- 👤 Hideki Miyabe
- 👤 Seizi Itahana
- 👤 Toshikazu Sana
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 17:43
CPC Classifications
B; B29; B29C; B29C33/00; B29C33/0055; B29C70/00; B29C70/04; B29C70/28; B29C70/40; B29C70/42; B29C70/46; B29C70/54; B29C70/546; B29L; B29L2031/00; B29L2031/08; B29L2031/082
Claims Analysis
Total Claims: 27
Claim 1
Independent Claim
106 words
A manufacturing method of composite articles, comprising sequentially (a) laying up a reinforcing fiber material impregnated with resin in a molding cavity within a molding jig of a matched die type, (b) evacuating the interior of the molding jig so that said resin impregnated reinforcing material is under reduced pressure, (c) closing and heating dies defining the molding cavity and thereby causing the resin to overflow from the laid up material in the molding cavity into a trap located remote from the molding cavity, and (d) applying pressure to the resin in the trap and thereby molding the laid up materials inside of the molding cavity.
Claim 2
Dependent Claim
106 words
A manufacturing method of composite articles, comprising sequentially (a) laying up a reinforcing fiber material impregnated with resin in a molding cavity within a molding jig of a matched die type, (b) evacuating the interior of the molding jig so that said resin impregnated reinforcing material is under reduced pressure, (c) closing and heating dies defining the molding cavity and thereby causing the resin to overflow from the laid up material in the molding cavity into a trap located remote from the molding cavity, and (d) applying pressure to the resin in the trap and thereby molding the laid up materials inside of the molding cavity.
Claim 3
Dependent Claim
33 words
A manufacturing method of composite articles according to claim 1, wherein inert gas is applied directly to the resin in said trap to press the laid up materials inside of said molding cavity.
Claim 4
Dependent Claim
25 words
A manufacturing method of composite articles according to claim 1, wherein, said trap in which the resin is accumulated is formed in said molding jig.
Claim 5
Dependent Claim
18 words
A manufacturing method of composite articles according to claim 2 wherein said inert gas is N 2 .
Claim 6
Dependent Claim
123 words
A manufacturing method of composite articles, comprising sequentially (a) laying up a reinforcing fiber material impregnated with resin in a molding cavity within a molding jig of a matched die type, (b) evacuating the interior of the molding jig so that said resin impregnated reinforcing material is under reduced pressure, (c) closing and heating dies defining the molding cavity and thereby causing the resin to overflow from the laid up material in the molding cavity into a trap located remote from the molding cavity, and (d) applying pressure to the resin in the trap and thereby molding the laid up material inside of the molding cavity, wherein resin is placed in said trap prior to closing and heating dies of the molding cavity.
Claim 7
Dependent Claim
123 words
A manufacturing method of composite articles, comprising sequentially (a) laying up a reinforcing fiber material impregnated with resin in a molding cavity within a molding jig of a matched die type, (b) evacuating the interior of the molding jig so that said resin impregnated reinforcing material is under reduced pressure, (c) closing and heating dies defining the molding cavity and thereby causing the resin to overflow from the laid up material in the molding cavity into a trap located remote from the molding cavity, and (d) applying pressure to the resin in the trap and thereby molding the laid up material inside of the molding cavity, wherein resin is placed in said trap prior to closing and heating dies of the molding cavity.
Claim 8
Dependent Claim
34 words
A manufacturing method of composite articles according to claim 1 wherein a diaphragm is in contact with the resin in said trap and pressure is applied to said diaphragm with either gas or liquid.
Claim 9
Dependent Claim
29 words
A manufacturing method of composite articles according to claim 1 wherein a piston is in contact with the resin in said trap and pressure is applied by said piston.
Claim 10
Dependent Claim
25 words
A manufacturing method of composite articles according to claim 5 wherein said trap in which the resin is accumulated is formed in said molding jig.
Claim 11
Dependent Claim
19 words
A manufacturing method of composite articles according to claim 1 wherein said trap is remote from said molding jig.
Claim 12
Dependent Claim
32 words
A manufacturing method of composite articles according to claim 9 wherein inert gas is applied directly to the resin in said trap to press the laid up materials in said molding cavity.
Claim 13
Dependent Claim
18 words
A manufacturing method of composite articles according to claim 7 wherein said piston is a load controlled piston.
Claim 14
Dependent Claim
19 words
A manufacturing method of composite articles according to claim 5 wherein said trap is remote from said molding jig.
Claim 15
Dependent Claim
25 words
A manufacturing method of composite articles according to claim 1 wherein heating is performed both before and after closing the dies of the molding cavity.
Claim 16
Dependent Claim
18 words
A manufacturing method of composite articles according to claim 10 wherein said inert gas is N 2 .
Claim 17
Dependent Claim
34 words
A manufacturing method of composite articles according to claim 9 wherein a diaphragm is in contact with the resin in said trap and pressure is applied to said diaphragm with either gas or liquid.
Claim 18
Dependent Claim
25 words
A manufacturing method of composite articles according to claim 5 wherein heating is performed both before and after closing the dies of the molding cavity.
Claim 19
Dependent Claim
33 words
A manufacturing method of composite articles according to claim 12 wherein inert gas is applied directly to the resin in said trap to press the laid up materials inside of said molding jig.
Claim 20
Dependent Claim
18 words
A manufacturing method of composite articles according to claim 17 wherein said inert gas is N 2 .
Claim 21
Dependent Claim
34 words
A manufacturing method of composite articles according to claim 12 wherein a diaphragm is in contact with the resin in said trap and pressure is applied to said diaphragm with either gas or liquid.
Claim 22
Dependent Claim
29 words
A manufacturing method of composite articles according to claim 9 wherein a piston is in contact with the resin in said trap and pressure is applied by said piston.
Claim 23
Dependent Claim
29 words
A manufacturing method of composite articles according to claim 12 wherein a piston is in contact with the resin in said trap and pressure is applied by said piston.
Claim 24
Dependent Claim
18 words
A manufacturing method of composite articles according to claim 20 wherein said piston is a load controlled piston.
Claim 25
Dependent Claim
27 words
A manufacturing method of composite articles according to claim 21 wherein said piston is a load controlled piston. reinforcing fiber materials are under reduced pressure and thereafter
Claim 26
Dependent Claim
22 words
A manufacturing method of composite articles according to claim 1 wherein a conduit is provided between the molding cavity and the trap.
Claim 27
Dependent Claim
22 words
A manufacturing method of composite articles according to claim 5 wherein a conduit is provided between the molding cavity and the trap.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1998-07-17 | 1999-01-16 | 1999-07-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2002-07-17 | 2003-01-16 | 2003-07-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2006-07-17 | 2007-01-16 | 2007-07-18 | $7700.00 | Window Closed / Lapsed |