Process for the production of thermoformed articles comprised of

Details Process for the production of thermoformed articles comprised of Process for the production of thermoformed articles comprised of

1978-08-15

1981-02-17

Larson, Lowell A.

Metal deforming

With 'coating' of work

72364, 72700, 148 115A, B21D 2602

Patent

active

042507278

ABSTRACT:
A process for producing thermoformed articles from thin-walled blanks composed of aluminum or magnesium alloys, the present invention particularly provides for forming a layer of alumina or magnesia on the surfaces of the respective aluminum or magnesium blank. The alumina or magnesia layers so formed are artificially formed in order to obtain desired thicknesses, the regular layers allowing ready removal of the articles from thermoforming molds. The present process is particularly intended for the production of thin-wall packaging members and motor vehicle components.

REFERENCES:
patent: 2116954 (1938-05-01), Singer
patent: 3350907 (1967-11-01), McDonald et al.
patent: 3584487 (1971-06-01), Carlson
patent: 4066480 (1978-01-01), Gullotti et al.
"Forming of Magnesium Alloys", Metals Handbook, 8th Edition, _vol. 4, (1969), pp. 426-429.
IBM Technical Disclosure Bulletin-"Superplastic Tools _and Materials", E. C. Uberbacher, Apr. 1969.

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