PROCEDURE FOR FABRICATING COMPOSITE PANELS WITH U-SHAPED STIFFENERS Russian patent published in 2010 - IPC B29C70/44 B64C1/00 

FIELD: machine building.

SUBSTANCE: procedure consists in fabricating preliminary impregnated composite plate for forming surface layer of panel on thermosetting mould. Further, to correspondingly mould U-shaped stiffeners and double-tee stiffeners there are produced planar composite plates preliminary impregnated. U-shaped stiffeners are moulded from planar plates on separate shapers; the double-tee stiffeners are arranged in seats of the said moulds. The said separate shapers are united in a single package; the package of stiffeners is arranged on the surface layer, turned at 180° and fixed in this position. Upon having stiffeners joined with the surface layer the package is removed. Further a vacuum bag is laid on the package of the surface layer of stiffeners; the bag is maximally fit around contours of stiffeners by means of profiles, and the said package is reinforced by means of thermosetting at specified pressure and temperature. External shapers are used to facilitate verticality of ribs of U-shaped stiffeners.

EFFECT: increased degree of rigidity of fabricated panels.

6 cl, 13 dwg