Method of making an offset corrugated sandwich construction
AssigneeThe United States of America as represented by the Secretary of the Navy
InventorHemen Ray
Life of this patent
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Abstract
A method for making an offset corrugated core sandwich construction is diosed. Mandrels of preestablished form and size are arranged into a pattern in a confined area. After covering the mandrels with a release film, strips of pliable, uncured composite material are arranged in a "peak-to-valley" pattern with adjacent strips being out of phase by 180 degrees. Selected mandrels are replaced by a granular mixture and top and bottom face sheets are fitted to the arrangement. After curing, all mandrels are removed from the construction.
Claims2
A method for making an off-set corrugated core sandwich construction comprising the steps of:
- placing shaping mandrels into a prearranged pattern wherein each mandrel has an exterior surface;
- wrapping a release film over the exterior surface of each of said mandrels;
- arranging a first strip of pliable composite material to bend over and around said mandrels to from alternating crests and troughs;
- arranging subsequent strips of pliable composite material to form alternating crests and troughs wherein each strip is approximately 180.degree. out of phase with an adjacent strip;
- attaching a face sheet to the crests of the strips and attaching a face sheet to the troughs of the strips to form an off-set corrugated core sandwich construction;
- replacing selected of said mandrels with a granular mixture;
- curing the construction;
- and
- removing the granular mixture and release films.
Dependencies are inferred from the claim text.