Patent ID: 11873791
Assignee: ENVISION ENERGY CO., LTD
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 14:
15. A method for manufacturing a material core for a wind turbine blade, the method comprising
cutting a core body of the material core to form a first groove which extends from a first side of the core body, in a first direction, into a depth d1 in the core body; and
cutting the core body to form a second groove which extends from a second side of the core body facing away from the first side, in a direction opposite to the first direction, into a depth d2 in the core body, wherein the second groove is parallel to the first groove, and wherein:

d2=t−d1+x, 

1 mm≤c≤d1,

wherein t is a thickness of the core body and a distance between the first and second grooves is o, wherein:

1 mm≤o≤5 mm.