Method of and apparatus for making a flechette load

Details Method of and apparatus for making a flechette load Method of and apparatus for making a flechette load

1988-04-07

1990-06-19

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264277, 264278, 264300, 425123, 425817R, B29C 3312, B29C 3910, B29C 6720

Patent

active

049351770

ABSTRACT:
In a method and apparatus for manufacturing a flechette load, a series of operative steps are carried out to produce a matrix-supported load of flechettes held in a desired array. First, a load of flechettes are mounted by a die end cap in a desired array in which at least the trailing end portions thereof are exposed and disposed in closely spaced side-by-side relation. Next, the die end cap is assembled to a die body such that at least the exposed trailing end portions of the flechettes are placed in the mold cavity of the assembled die. A mixture of expandable thermoplastic beads and, preferably, a bond weakening agent is also placed in the mold cavity with the mixture surrounding the exposed trailing end portions of the fletchettes therein. Finally, the mixture is heated so as to produce in the mold cavity directly on and about the exposed trailing end portions of the flechettes a matrix in the form of a solid foam body of a thermoplastic foam material. The desired precise location and alignment of the fletchettes relative to one another is thereby fixed by the solid matrix before placing the matrix-supported flechette load as a unit into a shell.

REFERENCES:
patent: 3413384 (1968-11-01), Olliff, Jr.
patent: 3599568 (1971-08-01), Shellnut et al.
patent: 4218415 (1980-08-01), Biscaro
patent: 4448900 (1984-05-01), Schwarz
patent: 4556438 (1985-12-01), Hoffmeister et al.
patent: 4740344 (1988-04-01), Wollbeck et al.

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