Method of making a cam shaft

Details Method of making a cam shaft Method of making a cam shaft

1985-03-19

1987-03-10

Silbaugh, Jan

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

264241, 264259, B29C 4500

Patent

active

046490116

ABSTRACT:
A hollow cam shaft of the type wherein lubricating oil is distributed to the cam portions includes a rod member positioned inside the shaft pipe member and spaced from the inner pipe surface by shaft end members and guide strips to form a reduced, annular volume to be filled with oil during engine start-up. The method of making the hollow cam shaft includes forming the rod member from a resinous material by injection molding, using a removable mold positioned in the pipe through-hole, and, in a preferred embodiment, flowing the resin through the mold cavity and into a recess located in the distal shaft end member, which recess has an enlarged portion for capturing the hardened resin rod end and facilitating mold removal.

REFERENCES:
patent: 4543222 (1985-09-01), Ehrlich

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