Convection shield for isostatic bonding apparatus

Details Convection shield for isostatic bonding apparatus Convection shield for isostatic bonding apparatus

1974-12-18

1976-02-24

Camby, John J.

Heating

Heating or heat retaining work chamber structure

Including baffle wall, work shield, or work support element

432242, 432247, 432253, 13 31, F27D 2300

Patent

active

039402452

ABSTRACT:
A gas pressure bonding furnace having a convection shield with (1) monolithic tubular refractory insulation having its upper end surrounding the work receiving hot zone of the furnace and its lower end depending to a cool zone, (2) an impervious tubular metal shell surrounding the tubular insulation and holding it under compression by differential thermal expansion, (3) a cover closing the top of the shell by a gas tight gasket seal and (4) a piston actuated by the gas working pressure to hold the cover closed. In a preferred form, the insulation is cast in the shell and the composition is an alumina cement with embedded alumina balloons.

REFERENCES:
patent: 981109 (1911-01-01), Rappold
patent: 2002241 (1935-05-01), Forde
patent: 2834590 (1958-05-01), Pugh
patent: 3257492 (1966-06-01), Western
patent: 3285593 (1966-11-01), Tavernelli et al.
patent: 3295844 (1967-01-01), Neeley et al.
patent: 3327041 (1967-06-01), Clune et al.
patent: 3571478 (1971-03-01), Teagan
patent: 3598378 (1971-08-01), Lundstrom
patent: 3752456 (1973-08-01), Larker

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