Adhesive bonding and miscellaneous chemical manufacture – Methods – Surface bonding and/or assembly therefor
Patent
1988-10-17
1990-01-16
Dawson, Robert A.
Adhesive bonding and miscellaneous chemical manufacture
Methods
Surface bonding and/or assembly therefor
264258, 267 49, 267148, B29C 4302
Patent
active
048941085
ABSTRACT:
A composite leaf spring for a motor vehicle has an elongated body of layers of epoxy coated fibers extending in the longitudinal direction of the spring. The composite fiber/adhesive body is formed and cured to provide sufficient strength and flexibility to suspend the vehicle. A synthetic fiber pad is fixed adjacent the end of the spring for engagement with the spring hanger of the suspension system to resist wear of the body at the interface with the hanger. In the preferred embodiment, the pad is a woven fabric of aramid fibers at least some of which extend substantially normal to the wear interface. A specific double plane weave fabric including a warp/fill fiber ratio of approximately 7:1 provides superior results. Epoxy resin is preferred for the adhesive both for the body of the spring and for pre-impregnation of the pad. In the related method, the pre-impregnated pad is applied to the mold contoured to correspond to the shape of the spring and elongated fibers are layered in the mold over the pad. Sufficient heat and pressure is applied to integrally bond the pad to the spring to form the wear surface.
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Modern Plastics Encyclopedia, Jarrel, Oct. 1977, p. 172.
Eilerman John F.
Mutzner John E.
Rau Thomas E.
Richard David S.
Dawson Robert A.
General Motors Corporation
Maki Steven D.
Phillips Ronald L.
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