Plastic and nonmetallic article shaping or treating: processes – With step of cleaning – polishing – or preconditioning...
Reexamination Certificate
2005-03-01
2005-03-01
Lee, Edmund H. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
With step of cleaning, polishing, or preconditioning...
C264S510000, C264S571000, C264S102000, C264S257000, C264S258000, C264S325000
Reexamination Certificate
active
06861017
ABSTRACT:
A method and apparatus for curing composite materials that emit large volumes of volatiles during processing. The apparatus includes tooling having a rigid forming surface contoured to the shape of the formed composite part. A plurality of passages extend from the forming surface through the tooling. The passages are in fluid contact with an exhaust port. A composite workpiece is laid up and placed adjacent the forming surface. The apparatus includes a heater that heats the composite workpiece to temperatures at which volatiles are emitted. An evacuation system draws the volatiles away from the composite workpiece through the passages in the tooling and out of the exhaust port. One embodiment of tooling according to the invention is used to form a sine wave spar. The tooling includes upper and lower tool inserts upon which U-shaped composite channels are formed. The upper and lower tools are placed adjacent to each other to form the web of the spar. Cap strips are placed on either side of the joined U-shaped channels. Side rail tools are then placed adjacent the cap strips. A breather cloth is placed over the tools and the entire assembly is placed within a vacuum bag. The assembly is then placed within an autoclave and connected to the vacuum exhaust of the autoclave. During processing, volatiles are drawn away from the composite workpiece through the passages in the tooling using the vacuum exhaust.
REFERENCES:
patent: 2035190 (1936-03-01), Renfrew
patent: 3554969 (1971-01-01), Long et al.
patent: 3666600 (1972-05-01), Yoshino
patent: 3764449 (1973-10-01), Copeland et al.
patent: RE28574 (1975-10-01), Ruoff
patent: 4028455 (1977-06-01), Ueda et al.
patent: 4065340 (1977-12-01), Dickerson
patent: 4146668 (1979-03-01), Dorey et al.
patent: 4165358 (1979-08-01), Johnson
patent: 4217157 (1980-08-01), Stoltze et al.
patent: 4311661 (1982-01-01), Palmer
patent: 4336175 (1982-06-01), Gibbs
patent: 4352388 (1982-10-01), Perrella
patent: 4405538 (1983-09-01), Saidla
patent: 4560523 (1985-12-01), Plumley et al.
patent: 4562033 (1985-12-01), Johnson et al.
patent: 4600617 (1986-07-01), Cole
patent: 4622091 (1986-11-01), Letterman
patent: 4681651 (1987-07-01), Brozovic et al.
patent: 4740346 (1988-04-01), Freeman
patent: 4755341 (1988-07-01), Reavely et al.
patent: 4782586 (1988-11-01), Joo et al.
patent: 4808362 (1989-02-01), Freeman
patent: 4816106 (1989-03-01), Turris et al.
patent: 4851280 (1989-07-01), Gupta
patent: 4869770 (1989-09-01), Christensen et al.
patent: 4915896 (1990-04-01), Rachal
patent: 4919876 (1990-04-01), Savage et al.
patent: 4942013 (1990-07-01), Palmer et al.
patent: 4983341 (1991-01-01), Kromrey
patent: 4988469 (1991-01-01), Reavely et al.
patent: 5009687 (1991-04-01), Kromrey
patent: 5045251 (1991-09-01), Johnson
patent: 5059273 (1991-10-01), Boyce et al.
patent: 5102604 (1992-04-01), Sidles et al.
patent: 5106568 (1992-04-01), Honka
patent: 5116216 (1992-05-01), Cochran et al.
patent: 5134002 (1992-07-01), Vallier
patent: 5151277 (1992-09-01), Bernardon et al.
patent: 5152949 (1992-10-01), Leoni et al.
patent: 5190094 (1993-03-01), Knoess
patent: 5236646 (1993-08-01), Cochran et al.
patent: 5242651 (1993-09-01), Brayden et al.
patent: 5322661 (1994-06-01), Henrio
patent: 5439635 (1995-08-01), Seemann
patent: 5443778 (1995-08-01), Schlingman
patent: 5518385 (1996-05-01), Graff
patent: 5589016 (1996-12-01), Hoopinggarner et al.
patent: 5686038 (1997-11-01), Christensen et al.
patent: 5709893 (1998-01-01), McCarville et al.
D. Stover (ed.), “Resin-transfer molding for advanced composites,” Adv. Composite, Mar./Apr. 1990, p. 60-80.
“Resin transfer molding of composite structures,” Aero. Eng'g, Dec. 1989, pp. 23-26.
“More composites in commercial transports,” Aero. Eng.'g, Dec. 1989, pp. 19-22.
McCarville Douglas A.
Medoff Irwin
Sweetin Joseph L.
LandOfFree
Method for forming composite parts from volatile-emitting... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method for forming composite parts from volatile-emitting..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method for forming composite parts from volatile-emitting... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3409340