Patent ID: 7811407

Claim:
A method for production of a sandwich panel core from composites, the method comprising: placing of a blank from a reinforcing material; after impregnation of the blank with a binder along a full surface of the blank to obtain a prepreg, hardening the binder during hot-pressing, wherein heat for the hardening of the binder in the prepreg is applied within boundaries of prepreg parts, and conditions slowing down the hardening along the prepreg between said parts are created to obtain a planar semifinished-blank comprising a set of substantially rigid parts in both longitudinal and transverse directions of the blank detached from each other and having a shape of core sides; after deformation of the semifinished-blank, obtaining a core with required geometries; and final hardening of the binder, wherein the obtained core is a folded 3-D structure with planar sides and ridges, the ridges connecting the core with skins of a sandwich panel.