METHOD OF MANUFACTURE OF WINDWHEEL BLADE FROM COMPOSITE MATERIAL Russian patent published in 2004 - IPC

FIELD: manufacture of wind motors; manufacture of blades, wings for flying vehicles and other hollow articles from composite materials.

SUBSTANCE: proposed method based on use for fabric filler and binder includes manufacture of hollow envelope by layer-by-layer lining of fabric impregnated in binder, holding this envelope at definite time, mechanical treatment, assembly of blades, filling of inner cavities with filler made from light porous material. Prior to assembly of blades layer of compound is applied to inner surface of envelope; granules of light porous material at size of 0.7-2.0 mm are spread on this layer and are kept at time sufficient for polymerization of compound and fixation of granules on surface of envelope. Granules of filler used for filling the inner cavity of envelope are preliminarily separated by single size. Assembled blade kept in holding mold is subjected to heating at temperature not above 100 C and is kept at this temperature for equalization of temperature over entire surface of blade. Size of granules of filler ranges from 7 to 9 mm.

EFFECT: improved quality; ease of performing static balancing of blade.

2 cl, 2 dwg