Cold wall superplastic forming press with surface mounted radian

Details Cold wall superplastic forming press with surface mounted radian Cold wall superplastic forming press with surface mounted radian

1992-04-06

1993-06-01

Jones, David

Metal deforming

By application of fluent medium, or energy field

Using fixed die

7234294, 72709, B21D 2602

Patent

active

052149498

ABSTRACT:
A vertically reciprocable lower chamber has a ceramic forming chamber surrounded by a steel reinforcing jacket. A fixed upper chamber includes a metal cover surrounded by ceramic insulator blocks and and an outer steel jacket. A horizontal foam ceramic platen inside the steel cover has a serpentine radiant heating coil attached to the flat underside thereof via inserted fasteners for more efficient heating of a metal sheet positioned horizontally between the upper and lower chambers. A plurality of foam ceramic insulator blocks have secondary heating coils attached to their inwardly facing surfaces for heating the peripheral edges of the metal sheet. This ensures a gas tight seal between the metal cover and the sheet.

REFERENCES:
patent: 4352280 (1982-10-01), Ghosh
patent: 4474044 (1984-10-01), Leistner et al.
patent: 4984348 (1991-01-01), Cadwell

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