Method for manufacturing metal graphite brush

Details Method for manufacturing metal graphite brush Method for manufacturing metal graphite brush

1993-12-27

1995-09-05

Walsh, Donald P.

Powder metallurgy processes

Powder metallurgy processes with heating or sintering

Powder pretreatment

419 5, 419 6, 419 10, 419 11, 419 12, 419 23, 419 17, 419 38, 419 39, 310DIG2, B22F 312

Patent

active

054476810

ABSTRACT:
A method for manufacturing a metal graphite brush comprises steps of preparing natural graphite powders of 60-70 wt %, electrolytic copper powders of 30-40 wt %, molybdenum disulfide and lead of 2.5 wt % and the mixed resin of novolak phenol resin and furfural resin powders of 1-15 wt % which are adhesives, wet-mixing graphite powders with adhesives, pulverizing mixed powders to diameters of less than 200 .mu.m, press-molding all the powders under a pressure of 2-3 ton/cm.sup.2 and heating at a temperature 700.degree. C., and attaching a lead wire thereto, simultaneously, wherein the average particle distribution of the powders is 27 .mu.m. The compound ratio of graphite powders: copper powders: molybdenum disulfide: lead is 62.5 wt %: 35 wt %: 1.5 wt %: 1.0 wt %, the adhesives comprising the mixed resin of novolak phenol resin and furfural resin by 50:50 is added by a weight ratio of 7.5 wt % to the graphite powders.

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patent: 4358319 (1982-11-01), Yoshida et al.
patent: 4550015 (1985-10-01), Korb et al.
patent: 4642201 (1987-02-01), Vogel
patent: 4799957 (1989-01-01), Vogel

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