US 12,290,996 B2
Method of manufacturing a wind turbine blade
Lars Nielsen, Kolding (DK); and Klavs Jespersen, Kolding (DK)
Assigned to LM WIND POWER INTERNATIONAL TECHNOLOGY II APS, Kolding (DK)
Filed by LM WIND POWER INTERNATIONAL TECHNOLOGY II APS, Kolding (DK)
Filed on Jan. 23, 2023, as Appl. No. 18/100,146.
Application 18/100,146 is a division of application No. 17/051,893, granted, now 11,590,718, previously published as PCT/EP2019/061028, filed on Apr. 30, 2019.
Claims priority of application No. 18170532 (EP), filed on May 3, 2018.
Prior Publication US 2023/0166464 A1, Jun. 1, 2023
Int. Cl. B29C 70/68 (2006.01); B29C 70/30 (2006.01); B29D 99/00 (2010.01); B29K 67/00 (2006.01); B29L 31/08 (2006.01); B32B 1/00 (2024.01); B32B 3/02 (2006.01); B32B 3/26 (2006.01); B32B 5/02 (2006.01); B32B 5/14 (2006.01)
CPC B29C 70/682 (2013.01) [B29C 70/30 (2013.01); B29C 70/68 (2013.01); B29C 70/683 (2013.01); B29D 99/0028 (2013.01); B32B 1/00 (2013.01); B32B 3/02 (2013.01); B32B 3/263 (2013.01); B32B 5/022 (2013.01); B32B 5/142 (2013.01); B29K 2067/06 (2013.01); B29L 2031/085 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A method of manufacturing a wind turbine blade, the blade having a profiled contour including a pressure side and a suction side, and a leading edge and a trailing edge with a chord having a chord length extending therebetween, the wind turbine blade extending in a spanwise direction between a root end and a tip end, said method comprising:
providing a mould (66);
arranging one or more layers of fibre material in the mould for providing a skin element (70);
arranging a preform (76) on at least part of the one or more layers of fibre material for providing a reinforcing element;
injecting the one or more layers of fibre material and the preform (76) with a curable resin; and
curing the resin,
wherein the preform (76) is impregnated with a curing promoter such that the concentration of curing promoter varies spatially within the preform (76).