Patent ID: 8123883

Claim:
A method of manufacturing large parts from composite materials, for manufacture of roots of blades for wind turbines, which includes shaping the root by applying fiber and resin-based composite materials to a mold and then curing, comprising the steps of: a) winding a tensioned band of fiber and resin-based composite material helically around the mold in successive sweeps, to achieve a shaped laminated body of the desired thickness on all areas of the mold; b) applying a removable protective sheet that is porous to resin to the whole surface of the shaped laminated body; c) applying a heat-shrinkable strip to the protective sheet, continuously covering the whole protective sheet; d) compacting the shaped laminated body by vacuum; e) curing the resin, wherein the curing is independent from the interior and exterior of the shaped laminated body on the mold, maintaining control of the curing from the inside out, by applying the heat to the exterior of the shaped laminated body and through the mold and per controlling the temperatures by means of thermocouples previously fitted in the shaped laminated body, maintaining the compaction by vacuum to obtain a cured body, and then demolding the cured body; f) aligning the cured body and machining the transverse surface to be abutted to the blade, to achieve a flat surface perpendicular to the axis of the cured body, where some axial housings are formed; and g) placing and affixing inserts in the axial housings, for securing the cured body to a blade.