Method for manufacturing of a fibre reinforced laminate, use of a wrinkle-preventing material, wind turbine blade and wind turbine
View Patent ↗A method for manufacturing of a fiber reinforced laminate is provided. A part of the laminate is build up to a determined thickness. A layer of wrinkle-preventing material is placed on top of the partially completed laminate. The layer of wrinkle-preventing material has a greater stiffness than the stiffness of a layer of similar thickness of the uncured laminate. Further on a new part of the laminate is build up to a determined thickness. In case the thickness of the laminate built up is not as large as a desired thickness of the completed laminate, the placing of the layer and the building of a new part of laminate is repeated until the thickness of the laminate built up is equal to the desired thickness of the completed laminate.
1. A method for manufacturing a fiber reinforced laminate, comprising:
building up a part of the laminate to a determined thickness, the part of the laminate comprising one or more fibre layers;
placing a layer of a pre-cured material on top of the partially completed laminate, wherein the layer of pre-cured material has a greater stiffness than the stiffness of a layer of similar thickness of a uncured laminate;
building up a new part of the laminate to a determined thickness; and
increasing the thickness of the laminate if a desired thickness of the laminate is bigger, by:
at least once or repeatedly placing a layer of the pre-cured material on top of the partially completed laminate, wherein the layer of the pre-cured material has a greater stiffness than the stiffness of a layer of similar thickness of the uncured laminate, and
once or repeatedly building up a new part of the laminate to a determined thickness,
until the thickness of the laminate built up is equal to the desired thickness of the completed laminate.
2. The method as claimed in claim 1 , wherein a layer of the pre-cured material is placed as a lowermost layer of the laminate.
3. The method as claimed in claim 1 , wherein a layer of the pre-cured material is placed as a uppermost layer of the laminate.
4. The method as claimed in claim 1 , wherein the pre-cured material comprises the same material as that of the fibre layers.
5. The method as claimed in claim 1 , wherein the pre-cured material is a pre-cured laminate material different from that of the fibre layers.
6. The method as claimed in claim 1 , wherein a solid layer is used as the layer of the pre-cured material.
7. The method as claimed in claim 1 , wherein a mesh-like or perforated layer is used as the layer of the pre-cured material.
8. A fibre reinforced laminate, comprising:
a plurality of fibre layers with at least one layer of a pre-cured material embedded therewithin.
9. The fibre reinforced laminate as claimed in claim 8 , wherein the pre-cured material comprises the same material as that of the fibre layers.
10. The fibre reinforced laminate as claimed in claim 8 , wherein the pre-cured material is a pre-cured laminate material different from that of the fibre layers, the pre-cured material being adapted to provide a desired stiffness ratio relative to the stiffness of the finished fiber reinforced laminate.
11. The fibre reinforced laminate as claimed in claim 8 , wherein the pre-cured material is a mesh-like material.
12. The fibre reinforced laminate as claimed in claim 8 , wherein pre-cured material is a perforated material.
13. A wind turbine blade comprising an aerodynamic shell made up of a fibre reinforced laminate, the fibre reinforced laminate comprising a plurality of fibre layers with at least one layer of a pre-cured material embedded therewithin.
14. The wind turbine blade as claimed in claim 13 , wherein the fibre reinforced laminate is manufactured by:
building up a part of the laminate to a determined thickness, the part of the laminate comprising one or more fibre layers;
placing a layer of a pre-cured material on top of the partially completed laminate, wherein the layer of the pre-cured material has a greater stiffness than the stiffness of a layer of similar thickness of a uncured laminate;
building up a new part of the laminate to a determined thickness; and
increasing the thickness of the laminate if a desired thickness of the laminate is bigger, by:
at least once placing a layer of the pre-cured material on top of the partially completed laminate, wherein the layer of the pre-cured material has a greater stiffness than the stiffness of a layer of similar thickness of the uncured laminate and building up a new part of the laminate to a determined thickness,
until the thickness of the laminate built up is equal to the desired thickness of the completed laminate.