Method for manufacturing wind turbine blades, blades for propellors, wings, or similar structures, and structure in the form of a blade obtained by means of this procedure

PROCEDURE FOR THE MANUFACTURE OF WIND TURBINE BLADES, PROPELLER BLADES, WINGS OR SIMILAR STRUCTURES, of the type of structures (1) that have a configuration which presents a leading edge and a trailing edge, characterized in that it comprises:

• the use of a female mould of the leading edge (5) to manufacture a leading edge piece (2), a female mould of the trailing edge (6) to manufacture a trailing edge piece (3), and a third mould (7) with which a male jig (8) made from composite is obtained that acts as a lost mould 15 to manufacture at least one inner structural side member (4);
• surface treatment with a demoulding agent of the inner faces of the aforesaid female moulds of the leading edge (5) and of the trailing edge (6) as in any composites process, applied automatically with a robot or numerical control machine and, once the demoulding agent is dry, application similarly in an automated manner with a robot of a varnish that will be the outer protector of the structure (1);
• application of the prepreg material in superimposed layers, according to a previously calculated sequence, one-dimensional, a veil, biaxial, triaxial etc.;
• coverage of the prepreg laminates with a vacuum film, proceeding then to connect them to a pump for the removal of the possible air occluded between the laminates and improve compaction between the layers of prepreg;
• engagement of the female moulds of the leading (5) and of the trailing (6) edges and positioning of the pieces with the prepreg laminates;
• application of a light pressure on the assembly, to assist contact between the prepreg laminate parts, and subjected to a thermal curve for the process of curing or polymerization of the assembly of said pieces in one and the same stage or strokes,