Method and apparatus for processing potentially explosive and sensitive materials for forming longitudinally perforated extrudate strands
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United States of America Patent
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Jul 14, 1992
Issued Date -
N/A
app pub date -
May 15, 1991
filing date -
Aug 29, 1988
priority date (Note) -
Expired
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Abstract
A manifolded, multiple-pin die apparatus and method processes potentially explosive material to form longitudinally perforated cylindrical pellets for use as gun propellants. A main entrance passage formed in mating manifold blocks gradually changes in cross-sectional configuration from circular to figure-eight, and then branches in a gently curved manner. The divergent branches formed then further branch in the same manner and feed circular cross-section passages leading to extruding dies wherein a series of die pins extend axially through a discharge passage. Each die comprises a central core member supporting an outer shell via radial ribs which are configured to form flow passages of hour-glass configuration. No change of flow direction in the entire apparatus exceeds fifteen degrees.
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