Plastic and nonmetallic article shaping or treating: processes – Explosive or propellant article shaping or treating – Forming or treating particulate material
Patent
1987-06-12
1988-08-16
Nelson, Peter A.
Plastic and nonmetallic article shaping or treating: processes
Explosive or propellant article shaping or treating
Forming or treating particulate material
264 31, 264 36, 264 8, 264 12, C06B 2100
Patent
active
047643293
ABSTRACT:
In mass production of explosive warheads, heat-meltable explosive material s continuously converted from an amorphous mass into small solid granules by directing melted exposive in a thin continuous stream against the upper inside surface of a rotating, generally bell-shaped vertically symmetrical element. Gravity and centrifugal force move the explosive downwardly on the said surface until it is flung off the bottom rim of the rotating bell element as small droplets. The droplets free-fall inside a surrounding cold air chamber which congeals them into solid granules of the explosive material which can then be loaded into the warheads. In another aspect of the invention, an explosive soluble in warm water, e.g., nitroguanidine, is provided in a contiuous warm water solution flow to the inside surface of the rotating bell-shaped element to generate free-falling solution droplets from its lower rim. As the droplets cool in free-fall through air, they cool and precipitate out the dissolved explosive as granules that are separated from the cool solvent.
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Costigan Edward F.
Gibson Robert P.
Goldberg Edward
Nelson Peter A.
The United States of American as represented by the Secretary of
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