Method of making cast-to-size epoxy tools for stamping sheet met

Details Method of making cast-to-size epoxy tools for stamping sheet met Method of making cast-to-size epoxy tools for stamping sheet met

1984-07-03

1986-07-22

Czaja, Donald

Plastic and nonmetallic article shaping or treating: processes

With step of making mold or mold shaping, per se

Utilizing surface to be reproduced as an impression pattern

264225, 264226, B29C 3340

Patent

active

046018670

ABSTRACT:
Very large tools can be cast-to-size by making a pattern of the article to be formed by the tool, laying the pattern up in a pattern box, applying a release coat and coating the pattern and box with a tough, curable tool surface layer. A small amount of epoxy filled with a thermally conductive particulate filler is cast into the pattern box before the surface layer fully cures. Relatively large chunks of thermally conductive material are added to the box which are covered with additional cast epoxy. The cure of the epoxy is controlled to effect complete cure at room temperature within a few days but never to exceed a peak cure temperature above about 70.degree. C.

REFERENCES:
patent: 2836530 (1958-05-01), Rees
patent: 3065511 (1962-11-01), Leitzel
patent: 3101065 (1963-08-01), Kalis
patent: 3239590 (1966-03-01), Trimble
patent: 4086118 (1978-04-01), Dewey
patent: 4141532 (1979-02-01), Wall
patent: 4380421 (1983-04-01), Morris
patent: 4423094 (1983-12-01), Dearlove et al.
Plastics Materials and Processes, Schwartz and Goodman, 1982, p. 365.
WO83/03792, Lindskog, "A Mould Part and a Method in its Manufacture and Use", 11/1983.
Modern Plastics Encyclopedia, vol. 59, No. 10A, 1982-83, pp. 32, 34, 35, 470-472.
CRC Handbook of Chemistry and Physics, 51st ed., 1970-71, p. E-10.

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