Manufacturing process of a honeycomb sandwich panel
European Patent Office Patent
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Abstract
Production of sandwich panels with a honeycomb core (12) enclosed on both sides, at least one side being closed by a fiber composite layer (14) comprises: (A) forming a sandwich consisting of the core and, on at least one side, from the inside outwards, a curable adhesive (20), a barrier layer (16) and a fiber layer (14); (B) placing this in an open mold which is then sealed with a vacuum film and evacuated; (C) curing the adhesive under vacuum, so that the cells (18) of the honeycomb are partially evacuated before they are sealed by the barrier layer; and (D) infusing the fibers (24) with matrix material (26) which is then cured. An independent claim is included for sandwich panels produced using the method in which the fiber composite layers have a pore volume of 2% and the panel has a minimum tensile strength, at right angles to the layers, of 3MPa.
First Claim
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International Classification(s)
Cited Art Landscape
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