Method of fabricating a ducted blanket for a rotor spar

Details Method of fabricating a ducted blanket for a rotor spar Method of fabricating a ducted blanket for a rotor spar

1981-08-31

1982-12-07

Massie, Jerome W.

Adhesive bonding and miscellaneous chemical manufacture

Methods

Surface bonding and/or assembly therefor

156222, 156286, 156289, 1563069, 156323, 156382, B23P 1504, B32B 3120

Patent

active

043625886

ABSTRACT:
A method for fabricating an impervious fiberglass blanket having a plural of spaced-apart slots on its inner side, such as for overlaying and venting a pressurized helicopter rotor spar, includes the steps of positioning a thin metal forming grid of spaced-apart strips, corresponding to the desired slots, on a forming table over a sacrificial layer of peelable material. Sheets of resin-impregnated fiberglass material are positioned over the grid, another sacrificial layer is applied, and a flat caul plate is placed over the lay-up. The laid-up assembly is placed in a vacuum bag, the bag is evacuated, and the assembly is cured in an autoclave. The sacrificial layers protect the blanket from mold release and outside contamination.

REFERENCES:
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patent: 3303081 (1971-02-01), Michaelson et al.
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patent: 3423261 (1969-01-01), Frantzen
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patent: 4154882 (1979-05-01), Ungar et al.
patent: 4175162 (1979-11-01), DeBoel et al.
patent: 4223429 (1980-09-01), Robinson

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