Patent : Improvements relating to the manufacture of wind turbine blades
A Bech - US Patent App. 15/777,271, 2018
A method of making a wind turbine blade is described . The blade comprises an outer shell having a laminate structure . The method comprises providing a blade mould ( 82 ) defining a shape of at least part of the outer shell of the blade . The mould extends in a spanwise direction between a root end ( 94 ) and a tip end ( 96 ) , and extends in a chordwise direction between a leading edge ( 90 ) and a trailing edge ( 92 ) . The method further includes providing a plurality of dry plies ( 66 ) comprising dry structural fibrous material and a plu rality of prepreg ( 68 ) plies comprising structural fibrous material impregnated with resin . The plurality of dry plies and the plurality of prepreg plies are arranged in the mould to form a plurality of layers of the laminate structure of the outer shell of the blade . The plies are arranged in the mould such that the dry plies are interleaved with the prepreg plies to form a hybrid shell structure in which the plies are arranged in a staggered relationship such that corresponding edges of the dry plies are offset from one another in the spanwise and / or chordwise direction of the mould and / or corresponding edges of the prepreg plies are offset from one another in the span - wise and / or chordwise direction of the mould
