Induction heating platen for hot metal working

Details Induction heating platen for hot metal working Induction heating platen for hot metal working

1985-09-13

1987-03-10

Leung, Philip H.

Electric heating

Metal heating

Of cylinders

219 1067, 219 1049R, 100 93R, H05B 610

Patent

active

046492496

ABSTRACT:
A platen for a press is disclosed providing fast heatup rate for materials to be superplastically formed, diffusion bonded, etc. The platen includes a ceramic plate having channels in its upper surface. A copper tube positioned within the channels conducts both electricity and cooling fluid therethrough. A metallic top plate positioned on top of the ceramic plate is induction heated by the electromagnetic field produced by the electrical current flowing through the copper tubing. A steel trough member covers the sides and bottom lengthwise portions of the copper tube in order to focus the electromagnetic waves upward into the top plate. The cover is composed of segments which are electrically insulated from each other in order to enhance the focusing effect. The ceramic plate is a heat and electrical insulator, and the upper surface thereof reflects radiant heat toward the top plate. A steel base plate provides firm support for the ceramic plate, the top plate and the other component elements.

REFERENCES:
patent: 2717949 (1955-09-01), Challenner
patent: 3041434 (1962-06-01), Alf
patent: 3754499 (1973-08-01), Heisman et al.
patent: 3790735 (1974-02-01), Peters, Jr.
patent: 3928744 (1975-12-01), Hibino et al.
patent: 4081737 (1978-03-01), Miyahara
patent: 4224494 (1980-09-01), Reboux et al.
patent: 4321444 (1982-03-01), Davies

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