Method of manufacturing a shell of a wind turbine blade having improved leading edge erosion protection, method for manufacturing the wind turbine blade, shell, wind turbine blade and wind turbine

1. A method for manufacturing a shell of a wind turbine blade having improved leading edge erosion protection, wherein the method comprises the steps of:

(a) providing a preform of the shell,

(b) providing a protective cover for protection of the shell,

(c) arranging the protective cover at a portion of a leading edge of the shell, so that an erosion protected shell is obtained; and

(d) casting the erosion protected shell together with the protective cover, wherein casting includes pouring or injecting a liquid material into a mold on which the preform of the shell is provided, so that the shell of the wind turbine blade having the improved erosion protection is obtained; wherein a paint coating is applied on portions of the shell being adjacent to the protective cover such that a flush transition from the paint coating to the protective cover is obtained and wherein the paint coating is not applied on portions of the shell where the protective cover is attached to the shell.

2. The method according to claim 1 , wherein the preform comprises a core material and layers of laminate.

3. The method according to claim 2 , wherein the protective cover comprises or consists of a material different from the core material and the layers of laminate.

4. The method according to claim 2 , wherein the protective cover comprises or consists of a material being relatively softer than the preform.

5. The method according to claim 1 , wherein the protective cover comprises or consists of at least one of a silicone and a rubber.

6. The method according to claim 5 , wherein the protective cover comprises or is from polyurethane.

7. The method according to claim 1 , wherein the protective cover is a precasted protective cover.

8. The method according to claim 1 , wherein the protective cover is arranged in a recess of the preform of the shell.

9. The method according to claim 8 , wherein the preform of the shell is provided on the mold, wherein the mold comprises an insert for providing the recess in the preform of the shell.

10. The method according to claim 1 , wherein the casting is performed by vacuum assisted resin transfer molding.

11. The method for manufacturing a wind turbine blade comprising a method according to claim 1 , wherein a spar cap and a spar web are attached to the shell.

12. A shell for a wind turbine blade, wherein the shell has improved leading edge erosion protection and comprises a core material and layers of laminate, wherein a protective cover for protection of the shell is arranged at portion of a leading edge of the shell and is provided as being casted together with the core material and the layers of laminate, wherein a paint coating is applied on portions of the shell being adjacent to the protective cover such that a flush transition from the paint coating to the protective cover is obtained, and wherein the paint coating is not applied on portions of the shell where the protective cover is attached to the shell.

13. A wind turbine blade comprising a shell according to claim 12 , wherein a spar cap and a spar web are attached to the shell.

14. A wind turbine comprising at least one wind turbine blade according to claim 13 .