Method of manufacturing electrotechnical articles

Details Method of manufacturing electrotechnical articles Method of manufacturing electrotechnical articles

1971-09-17

1977-09-13

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Vacuum treatment of work

To degas or prevent gas entrapment

264138, 264175, 264236, 264257, B29C 1500, B29D 710

Patent

active

040482804

ABSTRACT:
A method of manufacturing electrotechnical articles, preferably magnetic keys, from a magnetodielectric composition. The method comprises mixing together iron powder and a thermosetting resin containing a curing agent in vacuo in order to remove air inclusions and the volatile products of the thermosetting reaction; batching the resulting composition; rolling the batched composition to obtain flat sheet blanks of a thickness greater than that of finished products; molding and simultaneously pre-forming the sheets to obtain compacted blanks, and subjecting the blanks first to cold curing and thereafter to step-wise heat treatment.

REFERENCES:
patent: 2164058 (1939-06-01), Fowler
patent: 2330590 (1943-09-01), Kaschke
patent: 2761854 (1956-09-01), Coler
patent: 2779975 (1957-02-01), Lee et al.
patent: 2963746 (1960-12-01), Webb et al.
patent: 3032462 (1962-05-01), Saporito
patent: 3044151 (1962-07-01), Coler
patent: 3059278 (1962-10-01), Daniel
patent: 3166615 (1965-01-01), Farrell
patent: 3538600 (1970-11-01), Farrell et al.

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