Method of manufacturing a wind turbine blade
AssigneeLm Wind Power International Technology II Aps
InventorsLars Nielsen, Klavs Jespersen
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Abstract
The present invention relates to a method of manufacturing a wind turbine blade, comprising arranging one or more layers of fibre material and a preform in a mould (66), injecting the one or more layers of fibre material and the preform (76) with a curable resin, and curing the resin. The preform (76) is impregnated with a curing promoter such that the concentration of curing promoter varies spatially within the preform.
Claims20
A preform (76) of an elongate reinforcing element for a wind turbine blade, the preform (76) comprising a fibre material, wherein the preform (76) is impregnated with a curing promoter such that a concentration of the curing promoter varies spatially within the preform (76), wherein the preform (76) has a cross section with a central portion (78) and two opposing outer edges (80, 82), wherein the preform (76) has two edge regions (81, 83), each edge region extending laterally within a distance of 100 mm or less from a respective one of the outer edges (80, 82) towards the central portion (78) of the preform (76), and wherein the preform (76) is impregnated with the curing promoter within one or both of the edge regions (81, 83).
A preform (76) of an elongate reinforcing element for a wind turbine blade, the preform (76) comprising a fibre material, wherein the preform (76) is impregnated with a curing promoter such that a concentration of the curing promoter varies spatially within the preform (76), and wherein the curing promoter is present in edge regions of the preform (76) in a concentration of 0.01 to 10 parts by weight of the curing promoter relative to the weight of the fibre material.
Dependencies are inferred from the claim text.