Spar cap for a wind turbine rotor blade, set for manufacturing a half shell of a wind turbine rotor blade, assembly including a spar cap and a mold, and method of manufacturing a half shell of a wind turbine rotor blade

An assembly comprising:

• a spar cap including a stack of fiber material layers, which are stacked in a stacking direction from a bottom face to a top face;
• said spar cap further including a clipping layer arranged on said top face of said stack of fiber material layers;
• said clipping layer protruding beyond said stack of fiber material layers in a lateral direction perpendicular to said stacking direction;
• a mold having a layup surface and a protrusion which defines an edge of said mold;
• at least one block arranged on said protrusion in a part of said protrusion in which the clipping layer is located;
• and,
• said spar cap being configured to be arranged in said mold such that said top face of said stack of fiber materials is flush with at least one of said protrusion and said at least one block and said clipping layer protrudes beyond at least one of said protrusion and said at least one block.

A method of manufacturing a half shell of a wind turbine rotor blade, the method comprising:

• manufacturing a spar cap having a stack of fiber material layers stacked in a stacking direction from a bottom face to a top face and a clipping layer arranged on the top face of the stack such that the clipping layer protrudes beyond the stack of fiber material layers in a lateral direction which is perpendicular to the stacking direction;
• providing a mold, wherein the mold has a layup surface and a protrusion which defines an edge of the mold;
• placing a block on the protrusion at a position at which the clipping layer will be located, wherein the block elevates the protrusion;
• arranging the spar cap in the mold, wherein the spar cap is arranged such that the top face of the stack is flush with at least one of the protrusion and the block and such that the clipping layer protrudes beyond at least one of the protrusion and the block;
• and,
• fixing the part of the clipping layer which protrudes beyond the protrusion at the mold.