Process for curing thermosetting resins and elastomers

Details Process for curing thermosetting resins and elastomers Process for curing thermosetting resins and elastomers

1978-07-19

1980-03-18

Pavelko, Thomas P.

Plastic and nonmetallic article shaping or treating: processes

Carbonizing to form article

Agglomeration or accretion

156275, 264 406, 264135, 264265, 264DIG46, B29G 700

Patent

active

041939565

ABSTRACT:
Friction or antifriction material for use in brakes, clutches, bearings and the like is shaped and cured in a mold containing a mixture of a substantially non-electrically conducting heat bondable friction or antifriction material composite with at least one electrically conductive material dispersed throughout the mixture. The mold is closed to confine the mixture and at least two electrodes are placed opposite sides of and electrically connected with the mixture. An electrical potential is applied to the electrodes to pass an electric current substantially throughout the mixture to effect resistance heating, shaping and curing of the mixture within the mold. The heat input to the mixture is monitored to control the total heat input to a predetermined value required for effecting shaping and curing of the mixture. The maximum electric current passed through the mixture can also be controlled. A metal backing plate, which may have an adhesive material coated thereon, may be placed in intimate contact with the mixture and also with one of the electrodes.

REFERENCES:
patent: 2416427 (1947-02-01), Bonawit
patent: 2509652 (1950-05-01), Ruslmer
patent: 3239403 (1966-03-01), Williams
"Vulcanization or Other Heat Treatment by Electrical Conduction," F. L. Yerzley, Rubber Age, Nov. 1942, pp. 133-134.

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