Method of manufacturing a wind turbine blade comprising two members being joined by adhesion
The present invention relates to a method of manufacturing a wind turbine blade having a first member with a first joining surface and a second member with a second joining surface. The method includes applying at least one resin barrier to one or both of the joining surfaces, and subsequently locating the first and the second members adjacent each other so that they are joined by the at least one resin barrier. Hereby at least one cavity is formed between the first and second joining surfaces, which cavity is delimited by the at least one resin barrier. Subsequently resin is filled into the at least one cavity, and the resin is cured. The first member may be a blade shell, and the second member may be a blade spar.
1. A method of manufacturing a wind turbine blade having a first member with a first joining surface and a second member with a second joining surface, the first and second joining surfaces being adapted to be joined together, the method comprising:
applying at least one resin barrier to the first joining surface and/or to the second joining surface, wherein at least one of the at least one resin barrier is a string of adhesive so that the resin barrier itself forms a bond between the first and the second members, the string of adhesive being formed solely of adhesive,
subsequently locating the first and the second members adjacent each other whereby they are joined by the at least one resin barrier, and so that at least one cavity is formed between the first and second joining surfaces, which at least one cavity is delimited by the at least one resin barrier,
subsequently filling resin into the at least one cavity, and
curing the resin.
2. The method according to claim 1 , wherein the step of filling resin into the at least one cavity comprises injecting liquid resin.
3. The method according to claim 1 , wherein the at least one resin barrier is applied so that one cavity is formed.
4. The method according to claim 1 , wherein the at least one resin barrier is applied so that a plurality of cavities is formed.
5. The method according to claim 4 , wherein the resin is filled into the plurality of cavities concurrently.
6. The method according to claim 1 , wherein the steps of applying at least one resin barrier and locating the first and the second members adjacent each other are performed while the first member is still in a mould used during manufacturing of the first member, and wherein the first member is removed from the mould before performing the step of filling resin into the at least one cavity.
7. The method according to claim 6 , wherein the step of filling resin into the at least one cavity is performed with the first and second joining surfaces in a substantially vertical position.
8. The method according to claim 1 , wherein the adhesive is a polymer selected from polyurethane, epoxy, vinyl ester, acrylic, polyamide, phenolic, polyurethane and polyester.
9. The method according to claim 1 , wherein the resin is a polymer selected from polyurethane, epoxy, vinyl ester, acrylic, polyamide, phenolic, polyurethane and polyester.
10. The method according to claim 1 , wherein the first member is a blade shell half, and the second member is a blade spar.