Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Including use of vacuum
Patent
1995-07-11
1997-09-09
Davis, Robert
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Including use of vacuum
264257, 264316, 264314, 425112, 425389, 4254051, 425DIG44, B29C 7044
Patent
active
056653018
ABSTRACT:
A unitary vacuum bag for forming of a fiber reinforced composite article, made of a fabric mesh reinforced curable elastomer, having a smooth surface on both sides. The bag is constructed upon the surface of the article which is to be reproduced and upon a planar flange extension of the mold for said article. A rigid vacuum chamber assembly consisting of a planar fiber reinforced composite or equivalent sheet is sealed on the outer periphery to the mold flange extension and on the inner periphery to the top surface of the bag by rubber seals which are attached to the vacuum chamber assembly under surface. A vacuum port through the vacuum chamber assembly between the rubber seals allows vacuum to be applied to the chamber causing it to be pressed by atmospheric pressure to the mold flange extension and bag periphery thus sealing the bag to the mold periphery and simultaneously providing a continuous vacuum source around the entire periphery of the bag. The vacuum is connected to the fiber reinforcement in the mold via multiple self sealing micro porous conduits passing under the bag periphery between the vacuum chamber and the mold cavity containing the fiber reinforcement for the article. The bag is constructed within integral multiple injection ports positioned at strategic locations for introduction of catalysed thermoset resins into the reinforcement. Optionally, a series of tubular air pressure channels are made integral to the bag which, when inflated, cause the bag to distort, resulting in resin flow channels forming under the bag on both sides of the inflated air channel. Deflation of the air channel returns the bag to it's original contour with no trace of the flow channel evident on the surface of the completed article.
REFERENCES:
patent: 4622091 (1986-11-01), Letterman
patent: 4842670 (1989-06-01), Callis et al.
patent: 4873044 (1989-10-01), Epel
patent: 4878979 (1989-11-01), Steinbach
patent: 4942013 (1990-07-01), Palmer et al.
patent: 5131834 (1992-07-01), Potter
patent: 5152949 (1992-10-01), Leoni et al.
patent: 5433165 (1995-07-01), McGuiness et al.
Arctek Inc.
Davis Robert
LandOfFree
Apparatus and method for forming fiber reinforced composite arti does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for forming fiber reinforced composite arti, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for forming fiber reinforced composite arti will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-67276