US4428763A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transfer molding method of producing fiber reinforced glass matrix composite articles
Assignee: RTX Corp
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Filing: 1982-05-25
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Granted: 1984-01-31
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Expires: 2002-05-25
Abstract
Abstract A method of transfer molding fiber reinforced glass composite articles is described. The method has particular utility for providing strength in a particular direction in such a composite. The fibers are aligned in a mold cavity in a predetermined orientation to provide composite strength in particular directions, and a glass billet is heated and transferred to the mold. The article is cooled and removed from the mold producing a composite having longitudinal strength along the axes of the aligned fibers in the composite.
Inventors
- 👤 George K. Layden
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:42
CPC Classifications
C; C03; C03B; C03B19/00; C03B19/02; C03C; C03C14/00; C03C14/002; C03C2214/00; C03C2214/02; C03C2214/34; Y; Y10; Y10S; Y10S428/00; Y10S428/902; Y10T; Y10T428/00; Y10T428/24; Y10T428/24132; Y10T428/29; Y10T428/2913; Y10T428/2918
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
135 words
A method of making fiber reinforced glass matrix composite articles comprising aligning high temperature stable graphite, silicon carbide, or alumina fibers in a mold cavity circumferentially, axially, or both circumferentially and axially to provide composite strength in the particular direction of alignment, heating a billet of borosilicate, aluminosilicate, lithium aluminosilicate or high silica content glass matrix material to a temperature above about 1,000° C., transferring the glass matrix material into the mold cavity at a pressure of about 10 psi to about 100 psi to surround the bond the fibers with substantially no disturbance of the fiber orientation, cooling the thus impregnated fibers to a temperature below the strain point of the glass, and removing the fiber-matrix composite from the mold thus forming a composite article having composite strength in the particular direction of alignment.
Claim 2
Independent Claim
135 words
A method of making fiber reinforced glass matrix composite articles comprising aligning high temperature stable graphite, silicon carbide, or alumina fibers in a mold cavity circumferentially, axially, or both circumferentially and axially to provide composite strength in the particular direction of alignment, heating a billet of borosilicate, aluminosilicate, lithium aluminosilicate or high silica content glass matrix material to a temperature above about 1,000° C., transferring the glass matrix material into the mold cavity at a pressure of about 10 psi to about 100 psi to surround the bond the fibers with substantially no disturbance of the fiber orientation, cooling the thus impregnated fibers to a temperature below the strain point of the glass, and removing the fiber-matrix composite from the mold thus forming a composite article having composite strength in the particular direction of alignment.
Claim 3
Dependent Claim
27 words
The method of claim 1 wherein the fibers are selected from the group consisting of woven fibers, non-woven fibers, continuous length fibers, discontinuous fibers, and mixtures thereof.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-01-30 | 1987-08-01 | 1988-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-01-30 | 1991-08-01 | 1992-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-01-30 | 1995-08-01 | 1996-01-31 | $7700.00 | Window Closed / Lapsed |