Method of vibration-molding friction member

Details Method of vibration-molding friction member Method of vibration-molding friction member

1991-07-09

1993-01-26

Aftergut, Karen

Plastic and nonmetallic article shaping or treating: processes

Treatment of material by vibrating, jarring, or agitating...

By reciprocating or vibrating mold

264 405, 264120, 264294, 26433113, 425149, 425150, B28B 108, B29C 3500, B29C 4302

Patent

active

051820617

ABSTRACT:
A friction member, such as a brake lining, disk pad or clutch facing, may be molded using a method in which the mold for the member is vibrated at a frequency and with amplitudes that are selected to imbue the friction member with desired physical properties, such as a predetermined specific gravity and porosity. The materials forming the friction member may be placed in a mold and the pressure on the mold increased and relaxed a predetermined number of times. Each time the pressure on the mold is increased, the mold is vibrated at the desired frequency and with the desired amplitude to achieve the desired physical properties. Upon completeion of the periodic vibration of the mold, the material in the mold may be subjected to a predetermined rated pressure for a predetermined period of time without vibration.

REFERENCES:
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patent: 2309571 (1943-01-01), Bruce et al.
patent: 4105729 (1978-08-01), Helmrich et al.
patent: 4108935 (1978-08-01), Moneghan
patent: 4119692 (1978-10-01), Durinck
patent: 4203936 (1980-05-01), Kiwak et al.
patent: 4432922 (1984-02-01), Kaufman et al.
patent: 4457967 (1984-07-01), Chareire et al.
patent: 4900240 (1990-02-01), Leinweber
patent: 4968468 (1990-11-01), Leinweber

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