Method of preparing honeycomb insulation structure

Details Method of preparing honeycomb insulation structure Method of preparing honeycomb insulation structure

1976-02-26

1978-05-09

Hoag, Willard E.

Plastic and nonmetallic article shaping or treating: processes

Pore forming in situ

Composite article making

264 466, 264 467, 264221, 264225, 264267, 264275, 264279, 264298, B29D 302, B29D 2704

Patent

active

040887235

ABSTRACT:
Method is disclosed for preparing a honeycomb insulation structure having its cells partially filled with a low density foam and a high density integral skin completely covering one edge of the honeycomb. Method comprises placing one edge of a honeycomb in an inert material; introducing a foamable or foaming substance into the cells and allowing it to rise from the surface of the inert material until it overflows slightly. The overflowing foam comes into contact with a pressure platen just above the honeycomb thereby forming the high density integral skin. The level of the material in the cell determines the thickness of the void on one edge. Structure has utility in cryogenic storage.

REFERENCES:
patent: 3064345 (1962-11-01), Herman et al.
patent: 3407110 (1968-10-01), Axelson et al.
patent: 3425885 (1969-02-01), Webb
patent: 3543315 (1970-12-01), Hoffman
patent: 3555131 (1971-01-01), Weismann
patent: 3751534 (1973-08-01), Oxley
Zwolinski, Molded Integral Skin Urethane Foam, SPE Jour. vol. 25, 1969 pp. 24-27.

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