Method of manufacturing hybrid composite leaf springs

Details Method of manufacturing hybrid composite leaf springs Method of manufacturing hybrid composite leaf springs

1994-01-21

1995-06-20

Aftergut, Jeff H.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156169, 156173, 156245, 264136, 264137, 264258, 267148, 267149, F16F 1368, B65H 8100

Patent

active

054258294

ABSTRACT:
A hybrid composite automotive leaf spring comprises parallel glass and polyethylene terephthalate fibers distributed in a pattern replicated throughout a resin matrix. A method of producing the hybrid composite leaf spring comprises winding various proportions of glass and polyethylene terephthalate or nylon fibers together into a homogeneous mass in an epoxy matrix in a mold to form a blank, which is then compressed and cured into a leaf spring having a predetermined homogeneous mixture of parallel fibers distributed throughout the cross-section of the spring. The unitary spring has a spring rate that is a composite of the resin-bonded glass and other fibers. Different spring rates are obtained by varying the percentage content of the glass and other fibers, while maintaining the homogeneity of the resultant leaf spring.

REFERENCES:
patent: 4167429 (1979-09-01), Ackley
patent: 4352769 (1982-10-01), Meyer
patent: 4414049 (1983-11-01), Jones
patent: 4464216 (1984-08-01), Gardiner
patent: 4556204 (1985-12-01), Pflederer
patent: 4565356 (1986-01-01), Nickel
patent: 4659071 (1987-04-01), Woltron
patent: 4707317 (1987-11-01), Epel et al.
Lubin, George, Handbook of Composites, Van Nostrand Reinhold Company, 1982, pp. 450-451.
Warner, Gordon, et al, "Glass/epoxy spring is 80% lighter than steel," Plastics Design Forum, Jul./Aug. 1980, pp. 14, 16, and 17.

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