Method for making an electrode for electrical discharge machinin

Details Method for making an electrode for electrical discharge machinin Method for making an electrode for electrical discharge machinin

1995-03-03

1998-03-17

Tentoni, Leo B.

Plastic and nonmetallic article shaping or treating: processes

Stereolithographic shaping from liquid precursor

264105, 264129, 264221, 427 61, B29C 3340, B29C 3508, B29C 4102

Patent

active

057283451

ABSTRACT:
The present invention provides an improved method for rapidly making an electrode for electrical discharge machining. According to the invention, a stereolithography process is used to make a cured resin model of the electrode and having a network of interconnected supporting members defining the shape of the electrode and leaving channels between the supporting members to drain away uncured resin from the model. After the model is fully cured and the uncured resin drained away, a slurry mixture of graphite and resin is infiltrated into the voids of the model. The resin is then heat cured so that the resin is burned away leaving the electrode of pure carbon. Alternatively, the graphite and resin mixture can be cured sufficiently to harden and then an electrically conductive metalized coating is applied on the outer surface.

REFERENCES:
patent: 3600981 (1971-08-01), Wagner
patent: 4575330 (1986-03-01), Hull
patent: 4844144 (1989-07-01), Murphy et al.
patent: 5256340 (1993-10-01), Allison et al.
Abstract of Japan 5-24,118 (Published Feb. 2, 1993).
Abstract of Japan 6-297,251 (Published Oct. 25, 1994).
Creating Complex Precision Metal Parts Using QuickCast, Paul Blake & Owen Baumgardner, Texas Instruments; Laura Haburay & Paul Jacobs, 3D Systems, Apr. 1994.
Tanslation of Japan 58-4,313 (Published Jan. 11, 1983).

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