Electric heating – Metal heating – Of cylinders
Patent
1982-11-24
1984-10-16
Albritton, C. L.
Electric heating
Metal heating
Of cylinders
219 1055M, 219 1055F, 219 1055R, 219 1061R, 1562724, H05B 906
Patent
active
044777078
ABSTRACT:
In pultrusion processes in which resin/fiber composites are heat cured, nonuniformities in heating can result in lamination defects and other problems in the molded product. The problem of uniform heating for curing becomes more critical as the thickness of the mass being molded and cured increases. In accordance with a preferred embodiment of the present invention, heating uniformity problems are solved by employing an apparatus and method in which the mass to be cured is heated in an electromagnetic field to ensure thorough and uniform curing temperatures throughout the thickness of the mass. The present invention preferably employs a pair of electromagnetic wave generators operating either in phase or 180.degree. out of phase depending upon the dielectric properties of the material being cured and also upon the thickness of the mass being cured.
REFERENCES:
patent: 2593067 (1952-04-01), Spencer
patent: 3560695 (1971-02-01), Williams et al.
patent: 3999026 (1976-12-01), Boling
patent: 4093840 (1978-06-01), Jean et al.
patent: 4186044 (1980-01-01), Bradley et al.
Albritton C. L.
Cutter Lawrence D.
Davis Jr. James C.
General Electric Company
Lateef M. M.
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