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US 6,204,466 B1Granted
EDM electrode for creating a gear tooth form having a tooth shape in a cavity component and method of making an EDM electrode
AssigneeG.W. Plastics, Inc.
InventorDavid G. Tabor
Life of this patent
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Abstract
A method of forming a working electrical discharge machining electrode for creating an injection mold having a gear form. A cutter tool having a single cutting surface is formed, and the cutter tool is used to machine the electrode to form a tooth surface having the same curvature as the single cutting surface. In machining the electrode, a longitudinal axis of the cutter tool is substantially perpendicular to a longitudinal axis of an EDM electrode blank.
Claims8
A method comprising:
- (a) machining an electrical discharge machining electrode blank with a cutter to form a working electrical discharge machining electrode, wherein a cutting surface of the cutter has a tooth shape of a gear form;
- and
- (b) forming an injection mold cavity having the gear form from the working electrical discharge machining electrode, and injection molding a gear in the cavity.
A method of forming a gear cavity in a cavity component, comprising:
- (a) electrical discharge machining a gear form cutting surface in a cutter;
- (b) milling an electrode with the cutting surface to create the gear form in the electrode;
- and
- (c) forming the gear cavity in the cavity component by electrical discharge machining with the electrode.
1 more element
A method comprising:
- (a) forming a single gear form cutting surface in a cutter;
- (b) milling an electrical discharge process electrode with the cutter to create the gear form in the electrode;
- and
- (c) forming a gear shape in a cavity from the milled electrical discharge process electrode.
1 more element
Dependencies are inferred from the claim text.