Blow-forming flask and tool assembly

Details Blow-forming flask and tool assembly Blow-forming flask and tool assembly

2005-01-04

2005-01-04

Jones, David B. (Department: 3725)

Metal deforming

By application of fluent medium, or energy field

Using fixed die

C072S057000, C072S063000, C029S421100

Reexamination Certificate

active

06837088

ABSTRACT:
A flask and tool assembly includes a forming tool insert that is housed within an insulated flask having four vertical sides. An insulation enclosure surrounds the flask and the flask contains a heater plate for contacting the bottom of the forming tool insert. The tops of the sides of the flask provide surfaces for gripping bottom edges of a sheet metal blank to be formed. A cover for the tool-containing flask provides complementary gripping surfaces for top edges of the sheet metal blank and defines a chamber above the sheet metal blank for pressurized forming gas. A peripheral seal underlies the sheet metal blank and bridges a space between the outer side surfaces of the forming tool insert and the inner surfaces of the sides of the flask, thereby obviating the need to provide a precision fit between the flask and forming tool insert.

REFERENCES:
patent: 3934441 (1976-01-01), Hamilton et al.
patent: 4352280 (1982-10-01), Ghosh
patent: 4901552 (1990-02-01), Ginty et al.
patent: 4984348 (1991-01-01), Cadwell
patent: 5209093 (1993-05-01), Cadwell
patent: 5661992 (1997-09-01), Sanders
patent: 6253588 (2001-07-01), Rashid et al.

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