Method of improving structures comprised of fiber reinforced pla

Details Method of improving structures comprised of fiber reinforced pla Method of improving structures comprised of fiber reinforced pla

1982-01-25

1986-11-18

Thurlow, Jeffery

Plastic and nonmetallic article shaping or treating: processes

Direct application of fluid pressure differential to...

Including hydrostatic or liquid pressure

264101, 264118, 264122, 264126, 264127, 264162, 264314, 264571, B27J 500

Patent

active

046235051

ABSTRACT:
A method of producing unitary hollow structures, for example radomes, comprised of fiber reinforced plastic with a large percentage of the fibers being randomly oriented in directions essentially parallel to the wall surfaces of the structures and with at least one surface having grooves to reduce microwave reflection is presented. The structures are produced by packing a layer of fiber filled polymeric material in powder form around a mandrel which may have a pattern of grooves of ridges in its outer surface. The mandrel and packed powder are subjected to isostatic pressing to properly orient the fibers and achieve a density increase and powder cohesion. The pressed structure is sintered and the outer surface subesquently machined to a finished contour.

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