Method of making a plastic stabilized composite camshaft

Details Method of making a plastic stabilized composite camshaft Method of making a plastic stabilized composite camshaft

1990-07-02

1991-08-20

Lindsey, Rodney M.

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

To produce composite, plural part or multilayered article

264262, 29460, 298881, 74567, 164 98, 164112, B28B 500

Patent

active

050412531

ABSTRACT:
A method of manufacturing a composite camshaft having a shaft positioned within appropriately aligned and fixtured annular cam and bearing elements, each having interior protrusions that increase in size toward the tube axis. The shaft and elements are supported in a mold and a flowable, hardenable material is injected to fill the space between the tube and the elements for securing the elements to the shaft. The protrusions enhance the grip of the plastic with shrinkage. The shaft and the cam elements have nesting configurations that form a continuous space therebetween such that the hardened material compressionally resists torsional forces between the shaft and cam elements. Injection molding is performed without substantially stressing the freely supported shaft and without applying undue strain to the elements by providing undercut portions in the mold surrounding part of the exterior surface of the elements with high pressure plastic during injection.

REFERENCES:
patent: 2884661 (1959-05-01), Hurley

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