Method of and apparatus for fabricating a tool to form an asymme

Plastic and nonmetallic article shaping or treating: processes – Explosive or propellant article shaping or treating – Extrusion to form sheet or rod

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Details

264 35, 264 36, 102289, 102291, C06B 2100

Patent

active

047612541

ABSTRACT:
An elongated flexible bag is fitted inside templates that have aligned openings therein corresponding in shape to that desired for a solid rocket motor propellant bore. With the bottom sealed, the bag is filled with a multiplicity of solid pieces each having a cross section substantially less than that of the bag. When filled, suction is applied to the bag by a vacuum needle to exhaust air therefrom until the bag is very tight on the solid pieces contained therein. The vacuum needle is then withdrawn, the hole made thereby is sealed, and the templates are removed from the bag. After use in loading a solid rocket motor with propellant, the bag is cut open, the solid pieces are removed, and the bag is peeled out of the bore in the propellant.

REFERENCES:
patent: 3663148 (1972-05-01), Walker et al.
patent: 3673287 (1972-06-01), Thies et al.
patent: 3983780 (1972-10-01), Roach et al.
patent: 4374073 (1983-02-01), Hall, Jr. et al.
patent: 4420440 (1983-12-01), Marz
patent: 4469647 (1984-09-01), Speer

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