FIELD OF THE INVENTION

The present invention relates to a method for manufacturing a wind turbine blade by assembling a plurality of wind turbine blade parts via glue bonds and a system for manufacturing a wind turbine blade.

BACKGROUND OF THE INVENTION

Wind turbine blades of fibre-reinforced polymer and in particular the aerodynamic shells of wind turbine blades are usually manufactured in moulds, where the pressure side shell half part and the suction side shell half part of the blade are manufactured separately by arranging glass fibre mats and/or other fibre-reinforcement material, such as carbon fibre and polymer, in each of the two moulds. Afterwards, adhesive is applied to one or both of the blade shell parts before one of the moulds are turned upside down and positioned on top of the other mould, and the two halves are adhered together.

Today, adhesive is applied manually by an operator with a gluing tool. Excess adhesive is usually removed after assembly of the two blade shell parts, e.g. by cutting or grinding away the excess adhesive. Manual application is hard labour, and the operator may be exposed to the chemicals of the adhesive. Furthermore, manual application may also be subject to irregularities and may be time consuming.

The application time of the adhesive is critically related to the curing time of the adhesive. Therefore, a more automatic application of adhesive is essential for obtaining a fast and reliable adhesion and glue line, while also providing enhanced safety of the operators.

Accordingly, there is a need for a more automated process that more efficiently and standardized can apply adhesive to the wind turbine blade parts during manufacturing of a wind turbine blade.

SUMMARY OF THE INVENTION

It is an object of the invention to obtain a system and method, which overcome or ameliorate at least one of the disadvantages of the prior art or which provide a useful alternative.

According to a first aspect, this is obtained by a method for manufacturing a wind turbine blade. The method comprises providing a plurality of wind turbine blade parts and assembling the plurality of wind turbine blade parts via glue bonds. The method comprises providing a plurality of wind turbine blade parts including at least a first blade shell part extending in a longitudinal direction.

The method comprises simultaneously moving a first gluing tool and a second gluing tool along the longitudinal direction of the first blade shell part using at least a first conveying means, such as a first gantry, so as to simultaneously applying adhesive along a first part of the first blade shell part forming a first adhesive area using the first gluing tool and along a second part of the first blade shell part forming a second adhesive area using the second gluing tool.

The method comprises providing at least a second wind turbine blade part of the plurality of wind turbine blade parts and contacting the second wind turbine blade part to the first adhesive area and the second adhesive area to form at least a first glue bond and a second glue bond.

The method comprises assembling the plurality of wind turbine blade parts by curing the adhesive.

In a preferred embodiment, the first gluing tool comprises a first dispensing means. The second gluing tool comprises a second dispensing means having a different shape than the first dispensing means. A shape is preferably a geometric shape.

According to a second aspect, the objective is obtained by a mould system for manufacturing a wind turbine blade. The system comprises a first mould for moulding a first blade shell part extending in a longitudinal direction. The system comprises a first gluing tool configured to provide adhesive along a first part of the first blade shell part to form a first adhesive area. The system comprises a second gluing tool configured to provide adhesive to a second part of the first blade shell part to form a second adhesive area. The system comprises at least a first conveying means, such as a first gantry, configured for moving the first gluing tool and/or the second gluing tool along the first blade shell part in the longitudinal direction simultaneously.

It is an advantage of the present invention that a method and a mould system comprising at least a first conveying means configured for moving the first gluing tool and/or the second gluing tool is provided. Particularly, a method and a mould system where the first gluing tool and the second gluing tool move along the first blade shell part simultaneously. It is an advantage that adhesive may be provided automatic or semi-automatic, which may reduce potential irregularities associated with manual application of adhesive. Furthermore, the method and mould system may increase the safety of operators by reducing the exposure to adhesive.

It is a further advantage that adhesive may be applied by the first gluing tool and the second gluing tool simultaneously and thereby reducing the application time of adhesive. By reducing the application time of the adhesive, the optimal conditions for curing adhesive for assembling wind turbine blade parts may be provided.

The first conveying means may be configured to move the first gluing tool and a second conveying means may be configured to move the second gluing tool. The method may comprise moving the first gluing tool using the first conveying means, such as a first gantry. The method may comprise moving the second gluing tool using a second conveying means, such as a second gantry. By providing a first conveying means with a first gluing tool and a second conveying means with a second gluing tool, the gluing tools may move freely irrespective of each other.

The first conveying means and/or the second conveying means may be arranged spanning across the first blade shell part in the transverse direction. The first conveying means may be configured to move the first gluing tool and the second gluing tool along the first blade shell part. The first conveying means may comprise the first gluing tool and the second gluing tool.

Alternatively, the second conveying means may be arranged spanning across a second blade shell part in the transverse direction configured to move the second gluing tool along a second blade shell part. The first conveying means and/or the second conveying means may be configured to straddle the first blade shell part.

The advantage of applying adhesive to the first blade shell part and the second blade shell part simultaneously is that the application time may be reduced. The advantage of applying adhesive to the first blade shell part is that the adhesive will not be affected by movement and forces associated with the turning and repositioning of one of the blade shell parts.

The first gluing tool may be configured to apply adhesive to a leading edge and/or a spar cap of the first blade shell part. The second gluing tool may be configured to apply adhesive to a trailing edge for the first blade shell part.

The method may comprise providing an adhesive to a leading edge and/or a spar cap of the first blade shell part using the first gluing tool. The method may comprise providing an adhesive to a trailing edge for the first blade shell part using the second gluing tool.

The second wind turbine blade part may be at least one of a second blade shell part, a web or a flange. The web may be a shear web, a leading edge web, a trailing edge web or a third web. The flange may be a leading edge flange or a trailing edge flange. The second wind turbine blade part may be a stiffener, such as a C-shaped stiffener. The second wind turbine blade part may be a second blade shell part. The method may comprise contacting the second wind turbine blade part to at least the second adhesive area. The mould system may comprise a turning device configured to reposition a second mould for moulding a second blade shell part between an open mould position and a closed mould position, e.g., by lifting and rotating the second mould. The second wind turbine blade part may be turned and repositioned before contacting the second adhesive area.

The mould system may comprise a positioning device configured to position a wind turbine blade part such that the wind turbine blade part contacts the first adhesive area and/or the second adhesive area.

The method may comprise providing a third wind turbine blade part. The method may comprise contacting the third wind turbine blade part to at least the first adhesive area. The third wind turbine blade part may be a shear web, such as a leading edge web, a trailing edge web or a third web.

The first gluing tool may comprise a first dispensing means. The second gluing tool may comprise a second dispensing means different from the first dispensing means. The first dispensing means and/or the second dispensing means may be a glue shoe. The first dispensing means and the second dispensing means may have different shapes adapted to provide adhesive to different parts of the wind turbine blade part, such as the first blade shell part.

In a preferred embodiment, the first gluing tool may comprise a first dispensing means. The second gluing tool may comprise a second dispensing means having a different shape than the first dispensing means. A shape is preferably a geometric shape.

The first dispensing and/or the second dispensing means may comprise a plate-shaped member. The plate-shaped member may comprise a first edge and a second edge opposite the first edge, a third edge and a fourth edge opposite the third edge. The plate-shaped member may comprise an upper surface and an opposing lower surface. The lower surface may face the first blade shell part and/or the second blade shell part.

The plate-shaped member may comprise an adhesive outlet formed as a through hole in the plateshaped member. The adhesive outlet may have the form of a through hole through the plate-shape member. The adhesive outlet may be formed as through hole extending through the plate-shaped member between the upper surface and the lower surface. The adhesive outlet may be configured for ejecting adhesive. The through-hole of the adhesive outlet may be circular. The through-hole of the adhesive outlet may take any form or shape suitable to eject adhesive. The adhesive outlet may be located adjacent to the fourth edge of the plate-shaped member. The adhesive outlet may be located adjacent to the first edge, the second edge or the third edge of the plate-shaped member. The plate-shaped member may comprise a guiding member. The guiding member may be configured to guide the first dispensing means and/or the second dispensing means past an obstacle. The guiding member may be configured to guide the first gluing tool and/or the second gluing tool past an obstacle. Guiding past an obstacle may comprise guiding around an obstacle. The guiding member may comprise a plough, a rounded edge, a bracket or a spacer or a combination thereof. The guiding member may work in collaboration with the dampers to guide the first gluing tool and/or the second gluing tool past an obstacle, e.g., when the guiding member encounters an obstacle, the obstacle is guided along the guiding member while the dampener compresses to accommodate the displacement of the first dispensing means and/or the second dispensing means and/or the first gluing tool and/or the second gluing tool. An obstacle may be a flange, a web catcher or a resin pool. The obstacle may be located on the first blade shell part. The obstacle may be an unknown object according to the pre-determined model of the first blade shell part. The obstacle may be an impurity in the laminate of the first blade shell part.

The guiding member may comprise a plough. The plough may comprise a rounded first edge. The plough may comprise a rounded first edge and a bracket. The plate-shaped member of the first dispensing means may comprise a rounded first edge and a rounded second edge. The plough may comprise a rounded first edge and a bracket projecting form the first edge. The guiding member may be inclined or slanted.

The plate-shaped member may comprise a distance member. The distance member may project from the plate-shaped member. The distance member may project from an edge of the plate-shaped member, such as the fourth edge. The distance member may project from the lower surface of the plate-shaped member. The distance member may be configured to provide a distance between the plate-shaped member and the first blade shell part. The distance member may comprise a spacer and/or a bracket. The spacer and/or the bracket may have a height H. The distance member may provide a vertical distance between the first blade shell part and the plate-shaped member of the first dispensing means and/or the second dispensing means. The distance member may be configured to provide a glue bond to the blade shell surface with a height corresponding to the height H of the spacer and/or bracket. The height H may be between 10-35 mm, such as 15 mm. The distance member may be provided on the fourth edge of the plate-shaped member. The distance member may project from the fourth edge. The distance member may extend along at least a part of the fourth edge. The distance member may extend along the entire fourth edge. The distance member may be inclined or slanted.

Two adjacent edges may be angularly displaced, e.g., form an acute angle. The first edge and the fourth edge may be angularly displaced. The first edge and the fourth edge may form an acute angle. In one embodiment of the first dispensing means the bracket of the plough and the bracket of the distance member may be angularly displaced. The plough and the bracket of the distance member may form a baffle plate. In another embodiment of the first dispensing means the first edge and the bracket of the distance member are angularly displaced.

A guiding member may also function as a distance member. A distance member may also function as a guiding member.

The first dispensing means may comprise an attachment member configured to attach the first dispensing means to the first gluing tool. The second dispensing means may comprise an attachment member configured to attach the second dispensing means to the second gluing tool. The attachment member may protrude or project from the upper surface of the plate-shaped member. The attachment member may be substantially C-shaped or take another form for shape suitable to connect the first dispensing means with the first gluing tool or the second dispensing means with the second gluing tool.

The first gluing tool may be configured to apply glue close to obstacles. The first dispensing means may be configured to apply glue close to obstacles. The second gluing tool may be configured to apply adhesive having a thickness between 10-35 mm, such as 15 mm. The second gluing tool may be configured to provide a smooth transition between two adhesive areas or bond lines, such as a second primary adhesive area and a second secondary adhesive area. The second dispensing means may be configured to apply adhesive having a thickness between 10-35 mm, such as 15 mm. The second dispensing means may be configured to provide a smooth transition between two adhesive areas or bond lines.

The first gluing tool may be configured to use the first dispensing means and/or the second dispensing means. The second gluing tool may be configured to use the first dispensing means and/or the second dispensing means. The first gluing tool and/or the second gluing tool may be configured to change, e.g. automatically or by the aid of an operator, between the first dispensing means and the second dispensing means. The dispensing means may be arranged on a rack or the like. The advantage of having a first gluing tool configured to use a first dispensing means and/or a second dispensing means is that the number of conveying means may be reduced to one.

The first gluing tool may comprise a damper. The second gluing tool may comprise a damper. The damper may be a pneumatic damper configured to retract and extend. The term damper and the term dampener may be used to describe the same feature. The first gluing tool may comprise a first damper configured to retract, e.g., compress in a first direction. The first gluing tool may comprise a second damper configured to retract, e.g., compress in a second direction different from the first direction.

The second gluing tool may comprise a first damper configured to retract, e.g., compress in a first direction. The second gluing tool may comprise a second damper configured to retract, e.g., compress in a second direction different from the first direction.

The first direction may be perpendicular to the plane defined by the plate-shaped member of the first dispensing means or the second dispensing means. The second direction may be perpendicular to both the plane defined by the plate-shaped member and the first direction. The first direction may be vertical to the plane defined by the plate-shaped member. The second direction may be horizontal to the plane defined by the plate-shaped member. The second direction may be perpendicular to the direction of movement of the plate-shaped member or the first or second dispensing means.

The direction of movement of the first gluing tool and the direction of movement of the first dispensing means may be the same. The direction of movement of the second gluing tool and the direction of movement of the second dispensing means may be the same.

The first gluing tool and/or the second gluing tool may be navigated past an obstacle, e.g., by encountering an obstacle with a guiding member of the first dispensing means and/or the second dispensing means. The damper may be compressed in accordance with the encounter of the obstacle. The compression of the damper may move the first gluing tool and/or the second gluing tool around the obstacle. The first gluing tool and/or the second gluing tool may be moved in a horizontal plane or a vertical plane or a combination due to the compression of the first damper and/or the second damper. The obstacle may slide or move along the guiding member of the first gluing tool and/or the second gluing tool.

The first gluing tool may comprise a pump. The second gluing tool may comprise a pump. The pump may be configured to control the output of adhesive from the first dispensing means and/or second dispensing means. The pump may be configured to supply first dispensing means and/or the second dispensing means with adhesive. The pump may adjust the speed or volume of supply of adhesive. The pump may be controlled by a controller.

The pump may supply adhesive at a constant speed or flow while the movement speed of the first gluing tool and/or the second gluing tool may be adjusted. By adjusting the movement speed of the first gluing tool and/or the second gluing tool the width of the provided adhesive may be adjusted, i.e. a narrower adhesive width is provided at higher speed and a wider adhesive width is provided at lower speed. The speed of the gluing tool may be controlled by a controller. The movement speed of the first gluing tool and/or the second gluing tool may be adjusted while the pump may supply adhesive at a varying speed or flow. By adjusting the pump speed or pump flow of the first gluing tool and/or the second gluing tool the width of the provided adhesive may be adjusted, i.e. a narrower adhesive width is provided at lower speed or flow and a wider adhesive width is provided at a higher speed or flow. The speed of the pump may be controlled by a controller.

The first dispensing means and/or the second dispensing means may be tilted. The first dispensing means may be positioned at a first position and/or a second position. The second dispensing means may be positioned at a first position and/or a second position. The first position and the second position of the first dispensing means and/or the second dispensing means may be separated by and angle cp. The angle cp of the first dispensing means and/or the second dispensing means may be controlled by a controller.

The position of the first dispensing means and/or the second dispensing means may be adjusted according to previously applied adhesive. For example, the first dispensing means and/or the second dispensing means may be tilted to ensure that the dispensing means is positioned above the previously applied adhesive, e.g., such that the dispensing means does not scrape the previously applied adhesive. Especially, the second dispensing means, which is configured to provide adhesive such that the transition between two adhesive areas is minimized, is configured to tilt, e.g. be positioned in a first and a second position.

The first conveying means may be configured to move the first gluing tool in a first primary direction such that adhesive is applied along a first primary part of the first blade shell part forming a first primary adhesive area. The first conveying means may be configured to move the first gluing tool in a first secondary direction such that adhesive is applied along a first secondary part of the first blade shell part forming a first secondary adhesive area.

Forming the first adhesive area may comprise moving the first gluing tool in a first primary direction and applying adhesive along a first primary part of the first blade shell part forming a first primary adhesive area, followed by moving the first gluing tool in a first secondary direction opposite the first primary direction and applying adhesive along a first secondary part of the first blade shell part forming a first secondary adhesive area.

The second conveying means may be configured to move the second gluing tool in a second primary direction such that adhesive is applied along a second primary part of the first blade shell part forming a second primary adhesive area. The second conveying means may be configured to move the second gluing tool in a second secondary direction such that adhesive is applied along a second secondary part of the first blade shell part forming a second secondary adhesive area. Forming the second adhesive area may comprise moving the second gluing tool in a second primary direction and applying adhesive along a second primary part of the first blade shell part forming a second primary adhesive area, followed by moving the first gluing tool in a second secondary direction opposite the second primary direction and applying adhesive along a second secondary part of the first blade shell part forming a second secondary adhesive area.

The first blade shell part may be at least 40 metres long, i.e. in the longitudinal direction, and the required adhesive for assembling the wind turbine blade may be applied within 30 minutes, preferably within 20 minutes. The first conveying means and second conveying means may be configured to provide the required adhesive for assembling a wind turbine blade which is at least 40 metres long, i.e., in the longitudinal direction, within 30 minutes, preferably within 20 minutes. The time may start when the first portion of adhesive contacts the first blade shell part. The time may start when the first dispensing means and/or the second dispensing means starts ejecting adhesive. The time may end when the first dispensing means and/or the second dispensing means ends ejecting adhesive. The time may end when the gantries are parked at their initial positions after the first dispensing means and/or the second dispensing means ends ejecting adhesive. By applying the adhesive within 30 minutes it is assured that the adhesive does not cure before the wind turbine blade parts are assembled, i.e. contacted to the respective adhesive area(s).

The required adhesive for assembling the wind turbine blade may be applied within a time, which is dependent on the length of the first blade shell part in the longitudinal direction and the chemical mixture of the adhesive. The required adhesive for assembling the wind turbine blade may be applied within a threshold time. The threshold time may be expressed as a function of the length of the first blade shell part and the chemical mixture of the adhesive. The threshold time may be the time it takes for the adhesive to cure after application. The threshold time may be the maximum time elapsed before the second blade shell part is turned and positioned on the first blade shell part.

BRIEF DESCRIPTION OF THE FIGURES

The invention is explained in detail below with reference to embodiments shown in the drawings, in which

Fig. 1 is a schematic diagram illustrating an exemplary wind turbine,

Fig. 2 is a schematic diagram illustrating an exemplary wind turbine blade,

Fig. 3 is a schematic diagram illustrating an exemplary mould system,

Fig. 4 is a schematic diagram illustrating an exemplary mould system, Fig. 5 is a schematic diagram illustrating part of an exemplary mould system,

Figs. 6a-6b are schematic diagrams illustrating an exemplary wind turbine blade part,

Figs. 7a-7b are schematic diagrams illustrating exemplary gluing tools,

Figs. 8a-8b are schematic diagrams illustrating an exemplary dispensing means,

Figs. 9a-9b are schematic diagrams illustrating an exemplary dispensing means,

Figs. lOa-lOb are schematic diagrams illustrating an exemplary dispensing means,

Figs, lla-llb are schematic diagrams illustrating an exemplary dispensing means, and

Fig. 12 is a block diagram illustrating an exemplary method for manufacturing a wind turbine blade.

DETAILED DESCRIPTION OF THE INVENTION

In the following, a number of exemplary embodiments are described in order to understand the invention. The same reference numbers refer to the same elements and may thus not be described in relation to all figures.

Fig. 1 illustrates a conventional modern upwind wind turbine 2 according to the so-called "Danish concept" with a tower 4, a nacelle 6 and a rotor with a substantially horizontal rotor shaft. The rotor includes a hub 8 and three blades 10 extending radially from the hub 8, each having a blade root 16 nearest the hub and a blade tip 14 farthest from the hub 8.

Fig. 2 shows a schematic view of a first embodiment of a wind turbine blade 10. The wind turbine blade 10 has the shape of a conventional wind turbine blade and comprises a root region 30 closest to the hub, a profiled or an airfoil region 34 farthest away from the hub and a transition region 32 between the root region 30 and the airfoil region 34. The blade 10 comprises a leading edge 18 facing the direction of rotation of the blade 10 when the blade is mounted on the hub, and a trailing edge 20 facing the opposite direction of the leading edge 18.

The airfoil region 34 (also called the profiled region) has an ideal or almost ideal blade shape with respect to generating lift, whereas the root region 30 due to structural considerations has a substantially circular or elliptical cross-section, which for instance makes it easier and safer to mount the blade 10 to the hub. The diameter (or the chord) of the root region 30 may be constant along the entire root area 30. The transition region 32 has a transitional profile gradually changing from the circular or elliptical shape of the root region 30 to the airfoil profile of the airfoil region 34. The chord length of the transition region 32 typically increases with increasing distance rfrom the hub. The airfoil region 34 has an airfoil profile with a chord extending between the leading edge 18 and the trailing edge 20 of the blade 10. The width of the chord decreases with increasing distance r from the hub.

A shoulder 40 of the blade 10 is defined as the position where the blade 10 has its largest chord length. The shoulder 40 is typically provided at the boundary between the transition region 32 and the airfoil region 34.

It should be noted that the chords of different sections of the blade normally do not lie in a common plane, since the blade may be twisted and/or curved (i.e., pre-bent), thus providing the chord plane with a correspondingly twisted and/or curved course, this being most often the case in order to compensate for the local velocity of the blade being dependent on the radius from the hub.

The wind turbine blade 10 comprises a blade shell comprising two blade shell parts or half shells, a first blade shell part 24 and a second blade shell part 26, typically made of fibre-reinforced polymer. The wind turbine blade 10 may comprise additional shell parts, such as a third shell part and/or a fourth shell part. The first blade shell part 24 is typically a pressure side or upwind blade shell part. The second blade shell part 26 is typically a suction side or downwind blade shell part. The first blade shell part 24 and the second blade shell part 26 are fastened together with adhesive, such as glue, along bond lines or glue joints 28 extending along the trailing edge 20 and the leading edge 18 of the blade 10. Typically, the root ends of the blade shell parts 24, 26 have a semi-circular or semi-oval outer cross-sectional shape.

Fig. 3 is a schematic diagram illustrating in a perspective view an exemplary mould system for moulding a blade shell of a wind turbine blade, such as a mould system for manufacturing the wind turbine blade of Figs. 1-2. The mould system 50 comprises a first mould system section 51 and a second mould system section 71. The first mould system section 51 comprises a first mould 52 configured for manufacturing a first blade shell part of a wind turbine blade, such as the first blade shell part 24 of Fig. 2. The first mould 52 has a first non-moulding side 58 opposite a first moulding side 54. The first moulding side 54 has a first moulding surface 56 configured to define an outer shape of the first blade shell part 24. The second mould system section 71 comprises a second mould 72 configured for manufacturing a second blade shell part of a wind turbine blade, such as the second blade section 26 of Fig. 2. The second mould 72 has a second non-moulding side 78 opposite a second moulding side 74. The second moulding side 74 has a second moulding surface 76 configured to define an outer shape of the second blade shell part 26. The mould system 50 further comprises a turning device 80 configured for repositioning the first mould 52 between an open mould position (as illustrated) and a closed mould position, e.g., by lifting and rotating the first mould 52.

In Fig. 3 the mould system 50 is illustrated in an open mould position, where the first mould 52 is arranged next to the second mould 72, such the first moulding side 54 of the first mould 52 and the second moulding side 74 of the second mould 54 are facing the same direction, e.g., upwards. In the closed mould position, the first mould 52 is arranged on top of the second mould 72 such that a first moulding side 54 of the first mould 52 is facing the second moulding side 74 of the second mould 72.

Fig. 4 is a schematic diagram illustrating an exemplary mould system for moulding a blade shell of a wind turbine blade, such as the mould system of Fig. 3. The mould system 50 comprises a first mould system section 51, a second mould system section 71, a first mould 52 with a first moulding surface 56 configured to define an outer shape of the first blade shell part 24, a second mould 72 with a second moulding surface 76 configured to define an outer shape of the second blade shell part 26. A first blade shell part 24 may be provided or manufactured in the first mould 52 and a second blade shell part 26 may be provided or manufactured in the second mould 72 in a way known per se.

The mould system 50 comprises a first rail set 60 with two rails provided on each side of the first mould 52 and a second rail set 62 with two rails provided on each side of the second mould 72. The first rail set 60 and the second rail set 62 extend between a first rail end 64 and a second rail end 66. A third conveying means 94, e.g. a gantry, is configured to move along the first rail set 60 in a direction parallel to the longitudinal direction of the first mould 52 or the first blade shell part 24. A first conveying means 90 and a second conveying means 92, e.g. gantries, are configured to move along the second rail set 62 in a direction parallel to the longitudinal direction of the second mould 72 or the second blade shell part 26. The conveying means 90, 92, 94 are used to move tools, such as fibre layup tools and gluing tools (not illustrated), along the mould 52, 72 and the blade shells 24, 26 and thereby perform steps related to manufacturing of a wind turbine blade on the blade shells 24, 26. The conveying means 90, 92, 94 are configured to move between a first rail end 64 and a second rail end 66. The rail sets 60, 62 extend beyond the moulds 52, 72, such that the conveying means 90, 92, 94 may move to the rail ends 64, 66 (as illustrated in Fig. 5) during repositioning of the first mould 52.

Fig. 5 is a schematic diagram illustrating an exemplary mould system, such as the mould system of Figs. 3-4. Fig. 5 illustrates the first rail end 64 or the second rail end 66. The conveying means 90, 92, 94 are positioned at the rail ends 64, 66 such that they are not blocking the repositioning of the mould. The first conveying means 90 comprises a first gluing tool 100 and is thus used to move the first gluing tool 100 along the second mould (not illustrated). The second conveying means 92 comprises a second gluing tool 102 and is thus used to move the second gluing tool 102 along the second mould (not illustrated). The gluing tools 100, 102 provide adhesive along the blade shell provided in the mould. The gluing tools 100, 102 may be connected to a robot, a telescopic arm or similar, such as a robotic arm, and may be controlled by a computer or another processing unit. Thus, the process may be automatic or semi-automatic. The first conveying means 90 and second conveying means 92 may move simultaneously such that the first gluing tool 100 and the second gluing tool 102 provide adhesive along the blade shell simultaneously.

Figs. 6a-6b are schematic diagrams illustrating an exemplary wind turbine blade part, such as a wind turbine blade part of Figs. 1-2, such as first blade shell part 24 or a second blade shell part 26. For illustrative purposes, only the blade shell part 26 is illustrated and the moulds and the rail sets are not depicted in these figures. Figs. 6a and 6b illustrate adhesive areas 112a-112e, 114a-114e provided on a first area and a second area, respectively, on the blade shell part 26, such as on the inner surface of the blade shell part 26, by the gluing tools 100, 102 on the conveying means 90, 92.

Fig. 6a illustrates the first adhesive areas 112a-112e provided by the first gluing tool 100. The adhesive areas 112a-112e are provided such that another wind turbine blade part, e.g. a third wind turbine blade part (not illustrated), such as a web, a stiffener, a second blade shell part, a trailing edge flange or a leading edge flange, may be adhered to the blade shell part. The web may be a shear web, such as a leading edge web, a trailing edge web or a third web. The third wind turbine blade part may be contacted to the first adhesive area 112a-112e. The third wind turbine blade part may be positioned to contact the first adhesive area by a positioning device, such as a crane. The adhesive is provided on the adhesive areas 112a-112e before the third wind turbine blade part is contacted and thereby attached to the adhesive forming a glue bond. The third wind turbine blade part may be provided with adhesive before or after being provided on the adhesive area 112a-112e before closing the mould.

The adhesive may be provided in a specific order, such as illustrated in Fig. 6a. In Fig. 6a the first primary adhesive area 112a is provided first, followed by the first secondary adhesive area 112b, the first tertiary adhesive area 112c, the first quaternary adhesive area 112d and the first quinary adhesive area 112e. However, the order of the application of the adhesive areas may be different from the order illustrated in Fig. 6a. The first primary adhesive area 112a corresponds to an attachment area for a leading edge web. The first secondary adhesive area 112b corresponds to an attachment area for a trailing edge web. The first tertiary adhesive area 112c corresponds to an attachment area for the leading edge of the first blade shell part 24 which will be attached to the second blade shell part 26. The first quaternary adhesive area 112d corresponds to the attachment area of a C-shaped stiffener or shear web. The first quinary adhesive area 112e corresponds to the attachment area of a third web.

Fig. 6b illustrates the second adhesive areas 114a-114e provided by the second gluing tool 102. The adhesive areas 114a-114e are provided such that another blade shell part, e.g. the first blade shell part 24 (not illustrated), may be adhered to the second blade shell part 26. The adhesive may be provided in a specific order, such as illustrated in Fig. 6b. In Fig. 6b the second primary adhesive area 114a is provided first, followed by the second secondary adhesive area 114b, the second tertiary adhesive area 114c, the second quaternary adhesive area 114d and the second quinary adhesive area 114e. However, the order of the application of the adhesive areas may be different from the order illustrated in Fig. 6b. The second adhesive areas 114a-114e correspond to attachment areas for the trailing edge of the first blade shell part 24. The adhesive is provided on the adhesive areas 114a-114e before the first blade shell part 24 is contacted and thereby attached to the adhesive forming a second bond. The first blade shell part 24 may be repositioned using a turning device as described in Figs. 3-4.

The number of adhesive areas 112, 114 and their respective locations depend on the particular wind turbine blade in production. Thus, not all adhesive areas 112, 114 may be necessary and the number of adhesive areas 112, 114 are not limited to the ones illustrated in Figs. 6a-6b.

The gluing tools 100, 102 may apply adhesive during movement of the conveying means 90, 92 in both directions, i.e. the first primary adhesive area 112a is applied when the conveying means 90 moves from the root 16 of the blade shell part 26 to the tip 14, and the first secondary adhesive area 112b is applied when the conveying means 90 moves from the tip 14 to the root 16.

Figs. 7a-7b are schematic diagrams illustrating exemplary gluing tools, such as the gluing tools 100, 102 of Figs. 4-6. Fig. 7a illustrates a first gluing tool 100 and Fig. 7b illustrates a second gluing tool 102 different from the first gluing tool 100.

The gluing tools 100, 102 comprise dampener(s) 108 configured to compress horizontally or vertically. The dampener(s) 108 may compress when the gluing tool 100, 102 encounters a physical obstacle, such as flanges, web catchers or resin pools. The gluing tools 100, 102 comprise attachment means 109 for attaching the gluing tool to the conveying means 90, 92 or a robotic arm (not illustrated).

The gluing tools 100, 102 comprise pump(s) (not illustrated) configured to supply adhesive to output from the dispensing means 104, 106. The pump(s) may control the speed and/or volume of the output flow from the dispensing means 104, 106. The first gluing tool 100 comprises a first dispensing means 104, 104' e.g. a glue shoe (see also Figs. 8a-8b and Figs. lOa-lOb), and the second gluing tool 102 comprises a second dispensing means 106, 106' (see also Figs. 9a-9b and Figs, lla-llb), e.g. glue shoe, different than the first dispensing means. The first gluing tool 100 is configured to provide adhesive close to other elements, such as obstacles. The second gluing tool 102 is configured to provide adhesive such that the transition between two glue bonds of adhesive, i.e., adhesive areas, is minimized, e.g., such that there is no gap between two glue bonds.

The dispensing means 104, 104', 106, 106' may be positioned at a first position, such as the position wherein the gluing tools 100, 102 are positioned as illustrated in Fig. 7a and 7b. The dispensing means 104, 104', 106, 106' may be positioned at a second position, wherein the gluing tools 100, 102 are rotated with an angle cp. The rotation may be provided at the attachment means 109 and may be controlled by a controller (not illustrated).

Figs. 8a-8b,Figs. 9a-9b, Figs. lOa-lOb and Figs, lla-llb are schematic diagrams illustrating exemplary dispensing means 104, 104', 106, 106' e.g. the dispensing means of Figs. 7a-7b, such as a glue shoe.

Common for the dispensing means 104, 104', 106, 106' is that the dispensing means 104, 104', 106, 106' comprise a plate-shaped member 122 comprising an upper surface 124 and an opposed lower surface. The dispensing means 104, 104', 106, 106' comprise an attachment member 120 (as illustrated in Figs. 7-8 only) configured to attach the dispensing means 104, 104', 106, 106' to the gluing tool 100, 102. The attachment member 120 protrudes or projects from the upper surface 124 of the plate-shaped member 122. The attachment member 120 may be substantially C-shaped or take another form for shape suitable to connect the dispensing means 104, 104', 106, 106' with the gluing tool 100, 102.

The dispensing means 104, 104', 106, 106' comprises a first edge 130, a second edge 132 opposite the first edge 130, a third edge 134 and a fourth edge opposite the third edge 132. The edges 130, 132, 134, 136 define extent of the plate-shaped member 122.

The dispensing means 104, 104', 106, 106' comprises an adhesive outlet 107. The adhesive outlet 107 has the form of a through hole through the plate-shape member 122. The adhesive outlet 107 is configured for ejecting adhesive. The through-hole of the adhesive outlet 107 is illustrated as circular but may take any form or shape suitable to eject adhesive.

The dispensing means 104, 104', 106, 106' comprises a guiding member. The guiding member is configured to guide the dispensing means 104, 104', 106, 106' past a potential obstacle. The guiding member may comprise a plough 103a, a rounded edge 130, 132, a bracket 103c, 103b or a spacer 105, or a combination thereof. When the guiding member encounters an obstacle, the obstacle is guided along the guiding member while the dampener(s) 108 compresses to accommodate the displacement of the dispensing means 104, 104', 106, 106'.

The dispensing means 104, 104', 106, 106' comprises a distance member such as a spacer 105 and/or a bracket 103b with a height H. The distance member provides a vertical distance between the first blade shell part and the plate-shaped member 122 of the dispensing means 104, 104', 106, 106'. The distance member 105, 103b is configured to provide a glue bond to the blade shell surface with a height corresponding to the height H of the spacer 105 and/or bracket 103b. The height H may be between 10-35 mm, such as 15 mm.

Figs. 8a-8b are schematic diagrams illustrating a dispensing means, such as the first dispensing means 104 of Fig. 7a. Figs. lOa-lOb are also schematic diagrams illustrating a dispensing means, such as another embodiment of the first dispensing means 104, such as the first dispensing means 104' of Fig. 7a. The first dispensing means 104 is illustrated as seen from the top in Fig. 8a and from the side in Fig. 8b. The first dispensing means 104' is illustrated as seen from the top perspective in Fig. 10a and from the side perspective in Fig. 10b. The first dispensing means 104 may comprise all the features described for the first dispensing means 104' and vice versa.

The first dispensing means 104, 104' comprises a distance member, such as a bracket 103b. The bracket 103b is provided on the fourth edge 136 of the plate-shaped member 122, e.g., such that it projects from the fourth edge 136. The bracket 103b may extend along part of the fourth edge 136 or along the entire fourth edge 136, as illustrated.

The first dispensing means 104, 104' comprises an adhesive outlet 107 configured for ejecting adhesive. The adhesive outlet 107 is located adjacent to the fourth edge 136 of the plate-shaped member 122. The bracket 103b also functions as a stopper for the adhesive such that the adhesive flows substantially towards the third edge 134. By having the adhesive outlet 107 adjacent to an edge, in this case the fourth edge 136, in combination with a stopper, the flow of the adhesive can be more accurately determined or simulated.

The first dispensing means 104, 104' further comprises guiding member, such as a plough 103a, configured to guide the first dispensing means 104 and thereby the first gluing tool 100 around obstacles, such as web catchers. The plough 103a comprises a rounded first edge 130 and optionally a bracket 103c. The first dispensing means 104, 104' may comprise a plough 103a, e.g., a rounded edge, on the first edge 130 and optionally the second edge 132. The bracket 103c is provided on the first edge 130 of the plate-shaped member 122, e.g., such that it projects from the first edge 130. The bracket 103c may extend along at least a part of the first edge 130. The first gluing tool 100 moves such that the first dispensing means 104, 104' moves in the direction of movement D, such that a potential obstacle is guided along the plough 103a and along the bracket 103b thereby providing adhesive proximate to the obstacle. When the plough 103a encounters an obstacle, the dampener (not shown) is compressed such that the dispensing means 104, 104' moves past the obstacle. The plough 103a, e.g., the bracket 103c, is inclined or slanted towards the edge which is at the front during movement. This form provides for a smooth adjustment in combination with the dampeners in case the surface of the blade shell part is uneven.

The first dispensing means 104, 104' may move such that the plough 103a at the first edge 130 is at the front or the plough 103a at the second edge 132 is at the front. Thus, the first dispensing means 104' having two opposing ploughs 103a can move back and forth without having to turn the orientation of the first dispensing means 104'.

The first edge 130 and the fourth edge 136 are angularly displaced, e.g. they form an acute angle. In one embodiment of the first dispensing means 104 the bracket 103c of the plough 103a and the bracket 103b of the distance member are angularly displaced. The plough 103a and the bracket 103b of the distance member forms a baffle plate. In another embodiment of the first dispensing means 104' the first edge 130 and the bracket 103b of the distance member are angularly displaced.

The first dispensing means 104, 104' is useful when applying adhesive to a leading edge and/or a spar cap of a blade shell part. Figs. 9a-9b are schematic diagrams illustrating a dispensing means, such as the second dispensing means 106 of Fig. 7b. Figs, lla-llb are also schematic diagrams illustrating a dispensing means, such as another embodiment of the first dispensing means 106, such as the first dispensing means 106' of Fig. 7a. The second dispensing means 106 is illustrated as seen from the top in Fig. 9a and from the bottom/side in Fig. 9b. The second dispensing means 106' is illustrated as seen from the top perspective in Fig. Ila and from the side perspective in Fig. 11b. The second dispensing means 106 may comprise all the features described for the second dispensing means 106' and vice versa.

The second gluing tool 102 moves such that the second dispensing means 106, 106' moves in the direction of movement D. In one embodiment the plough 103a of the second dispensing means 106' has similar or the same features as the plough 103a of the first dispensing means 104. The second dispensing means 106' moves in the direction of movement D, such that a potential obstacle is guided along the plough 103a and along the bracket 103b thereby providing adhesive proximate to the obstacle. The bracket 103c of the plough 103a and the bracket 103b of the distance member are angularly displaced, e.g., they form an acute angle. The second dispensing means 106' moves in the direction D from one end of the blade shell part to the other, e.g., from root to tip, with the first edge 130 at the front while applying adhesive, then make a turn and make its way back, e.g., from tip to root, with the first edge 130 at the front while applying adhesive.

In one embodiment the second dispensing means 106 comprises an adhesive outlet 107 configured for ejecting adhesive and a spacer 105 with a height H. The spacer 105 is configured to provide a glue bond to the blade shell surface with a height corresponding to the height H of the spacer 105. The spacer projects from the lower surface 126 of the plate-shaped member 122. The height H may be between 10-35 mm, such as 15 mm. The spacer 105 may also function as a guiding member. The spacer 105, is inclined or slanted towards the edge which is at the front during movement, e.g. the first edge 130. This form provides for a smooth adjustment in combination with the dampeners in case the surface of the blade shell part comprises an obstacle or is uneven.

In another embodiment of the second dispensing means 106' the adhesive outlet 107 is located adjacent to the fourth edge 136 of the plate-shaped member 122. The bracket 103b also functions as a stopper for the adhesive such that the adhesive flows substantially towards the third edge 134. By having the adhesive outlet 107 adjacent to an edge, in this case the fourth edge 136, in combination with a stopper, the flow of the adhesive can be more accurately determined or simulated.

The second dispensing means 106 is useful when applying adhesive to a trailing edge of a blade shell part. In general, the system may utilise different shapes of glue shoes that are adapted to provide adhesive to different parts of the blade shell. The various glue bonds may for instance have different widths and thicknesses, which may require application of the adhesive via different shaped glue shoes. The system may also be configured to use different glue shoes for the same gluing tool. The system can be configured to automatically change the glue shoe, or an operator can assist in changing the glue shoe. The glue shoes can for instance be arranged on a rack or the like.

Fig. 12 is a block diagram illustrating an exemplary method 200 for manufacturing a wind turbine blade, such as a method for manufacturing the wind turbine blade of the previous figures. The wind turbine blade may be manufactured using a mould system as described in Figs. 3-6. The method 200 comprises providing 202 a plurality of wind turbine blade parts. Providing 202 a plurality of wind turbine blade parts includes providing 204 at least a first blade shell part, which extends in a longitudinal direction. The first blade shell part may be provided 204 in a mould as described in relation to the previous figures.

The method 200 comprises simultaneously moving 210 a first gluing tool and moving 220 a second gluing tool. The first gluing tool may be moved 210 using a first conveying means, such as a gantry. The second gluing tool may be moved 220 using the first conveying means, such as a gantry. Alternatively, the second gluing tool may be moved 220 using a second conveying means.

The method 200 comprises applying 212 adhesive along a first part of the first blade shell part with the first gluing tool, thereby forming a first adhesive area. The method 200 comprises applying 222 adhesive along a second part of the first blade shell part with the second gluing tool, thereby forming a second adhesive area.

While applying 212, 222 adhesive the first gluing tool and/or the second gluing tool may navigate past, e.g. around, an obstacle located in the intended adhesive area. The intended adhesive area may be pre-determined by a controller. The first gluing tool and/or the second gluing tool may navigate past an obstacle by encountering the obstacle with the first dispensing means and/or the second dispensing means. The obstacle may be encountered with the guiding member of the first dispensing means and/or the second dispensing means.

The method 200 comprises providing 230 at least a second wind turbine blade part, such as a second blade shell part, a web, a trailing edge flange or a leading edge flange. The method 200 may comprise contacting 232 the second wind turbine blade part to at least the second adhesive area. In the case where the second wind turbine blade part is a second blade shell part, the second blade shell part may be positioned to contact the second adhesive area by a turning device configured to reposition the second mould for moulding the second blade shell part between an open mould position and a closed mould position, e.g., by lifting and rotating the second mould.

The method 200 may comprise providing 234 a third wind turbine blade part, such as a web, a trailing edge flange or a leading edge flange. The second wind turbine blade part may be a second blade shell part while the third wind turbine blade part may be a shear web. The method 200 may comprise contacting 236 the third wind turbine blade part to at least the first adhesive area. The third wind turbine blade part may be positioned to contact the first adhesive area with a positioning device which is configured for lifting, moving and/or repositioning the third wind turbine blade part.

The method 200 comprises assembling 240 the plurality of wind turbine blade parts. Assembling 240 the wind turbine blade parts may comprise repositioning 242 the first mould between an open mould position and a closed mould position, e.g., by lifting and rotating the first mould. Assembling 240 the wind turbine blade parts comprises curing 244 the adhesive.

EXEMPLARY EMBODIMENTS

Exemplary embodiments of the present disclosure are set out in the following items: 1. A method for manufacturing a wind turbine blade comprising providing a plurality of wind turbine blade parts and assembling the plurality of wind turbine blade parts via glue bonds, wherein the method comprises the steps of: providing a plurality of wind turbine blade parts including at least a first blade shell part extending in a longitudinal direction, simultaneously moving a first gluing tool and a second gluing tool along the longitudinal direction of the first blade shell part using at least a first conveying means, such as a first gantry, so as to simultaneously applying adhesive along a first part of the first blade shell part forming a first adhesive area using the first gluing tool and along a second part of the first blade shell part forming a second adhesive area using the second gluing tool, providing at least a second wind turbine blade part of the plurality of wind turbine blade parts and contacting the second wind turbine blade part to the first adhesive area and the second adhesive area to form at least a first glue bond and a second glue bond, and assembling the plurality of wind turbine blade parts by curing the adhesive.

2. Method according to item 1 comprising: moving the first gluing tool using the first conveying means, such as a first gantry, moving the second gluing tool using a second conveying means, such as a second gantry.

3. Method according any of the preceding items, wherein the first conveying means and the second conveying means are arranged spanning across the first blade shell part in the transverse direction.

4. Method according to any of the preceding items wherein the second wind turbine blade part is at least one of a second blade shell part, a web or a flange.

5. Method according to any of the preceding items, wherein the second wind turbine blade part is a second blade shell part, and wherein the method comprises contacting the second wind turbine blade part to at least the second adhesive area.

6. Method according to any of the preceding items comprising providing a third wind turbine blade part, and wherein the method comprises contacting the third wind turbine blade part to at least the first adhesive area.

7. Method according to item 6 wherein the third wind turbine blade part is a shear web, such as a leading edge web, a trailing edge web or a third web.

8. Method according to any of the preceding items comprising providing an adhesive to a leading edge and/or a spar cap of the first blade shell part using the first gluing tool. 9. Method according to any of the preceding items comprising providing an adhesive to a trailing edge for the first blade shell part using the second gluing tool.

10. Method according to any of the preceding items, wherein forming the first adhesive area comprises moving the first gluing tool in a first primary direction and applying adhesive along a first primary part of the first blade shell part forming a first primary adhesive area followed by moving the first gluing tool in a first secondary direction opposite the first primary direction and applying adhesive along a first secondary part of the first blade shell part forming a first secondary adhesive area.

11. Method according to any of the preceding items, wherein forming the second adhesive area comprises moving the second gluing tool in a second primary direction and applying adhesive along a second primary part of the first blade shell part forming a second primary adhesive area followed by moving the first gluing tool in a second secondary direction opposite the second primary direction and applying adhesive along a second secondary part of the first blade shell part forming a second secondary adhesive area.

12. Method according to any of the preceding items, wherein the first blade shell part is at least 40 metres and the required adhesive for assembling the wind turbine blade is applied within 30 minutes, preferably within 20 minutes.

13. A mould system for manufacturing a wind turbine blade, the system comprising: a first mould for moulding a first blade shell part extending in a longitudinal direction, a first gluing tool configured to provide adhesive along a first part of the first blade shell part to form a first adhesive area, a second gluing tool configured to provide adhesive to a second part of the first blade shell part to form a second adhesive area, at least a first conveying means, such as a first gantry, configured for moving the first gluing tool and/or the second gluing tool along the first blade shell part in the longitudinal direction simultaneously.

14. Mould system according to item 13, wherein the first conveying means is configured to move the first gluing tool and a second conveying means is configured to move the second gluing tool.

15. Mould system according to any of the items 13-14, wherein the first conveying means and/or the second conveying means is arranged spanning across the first blade shell part in the transverse direction. 16. Mould system according to any of the items 13-15 comprising a turning device configured to reposition a second mould for moulding a second blade shell part between an open mould position and a closed mould position, e.g., by lifting and rotating the second mould.

17. Mould system according to any of the items 13-16 comprising a positioning device configured to position a wind turbine blade part such that the wind turbine blade part contacts the first adhesive area and/or the second adhesive area.

18. Mould system according to any of the items 13-17, wherein the first gluing tool comprises a first dispensing means and the second gluing tool comprises a second dispensing means different from the first dispensing means.

19. Mould system according to any of the items 13-18, wherein the first gluing tool and/or second gluing tool comprises a damper.

20. Mould system according to any of the items 13-19, wherein the first conveying means is configured to move the first gluing tool in a first primary direction such that adhesive is applied along a first primary part of the first blade shell part forming a first primary adhesive area and to move the first gluing tool in a first secondary direction such that adhesive is applied along a first secondary part of the first blade shell part forming a first secondary adhesive area.

21. Mould system according to any of the items 13-20, wherein the second conveying means is configured to move the second gluing tool in a second primary direction such that adhesive is applied along a second primary part of the first blade shell part forming a second primary adhesive area and to move the second gluing tool in a second secondary direction such that adhesive is applied along a second secondary part of the first blade shell part forming a second secondary adhesive area.

22. Mould system according to any of the items 13-21, wherein the first conveying means and second conveying means are configured to provide the required adhesive for assembling a wind turbine blade which is at least 40 metres within 30 minutes, preferably within 20 minutes.

23. Mould system according to any of the items 13-22, wherein the first gluing tool is configured to apply adhesive to a leading edge and/or a spar cap of the first blade shell part.

24. Mould system according to any of the items 13-23, wherein the second gluing tool is configured to apply adhesive to a trailing edge of the first blade shell part. Mould system according to any of the items 13-24, wherein the second gluing tool is configured to provide adhesive such that the transition between two adhesive areas is minimized, e.g., such that there is no gap between two adhesive areas.

LIST OF REFERENCE NUMERALS

2 wind turbine

4 tower

6 nacelle

8 hub

10 blade

14 blade tip

16 blade root

18 leading edge

20 trailing edge

24 first blade shell part (pressure side)

26 second blade shell part (suction side)

28 bond lines/glue joints/glue bonds

30 root region

32 transition region

34 airfoil region

40 shoulder

50 mould system

51 first mould system section

52 first mould

54 first moulding side

56 first moulding surface

58 first non-moulding side

60 first rail set

62 second rail set

64 first rail end

66 second rail end

71 second mould system section

72 second mould

74 second moulding side

76 second moulding surface

78 second non-moulding side

80 turning device

90 first conveying means

92 second conveying means

94 third conveying means 100 first gluing tool

102 second gluing tool

103a plough

103b bracket

103c bracket

104 first dispensing means

104' first dispensing means

105 spacer

106 second dispensing means

106' second dispensing means

107 adhesive outlet

108 dampener(s)

109 attachment means

110 adhesive area

112a-112e first adhesive area

112a first primary adhesive area

112b first secondary adhesive area

114a-114e second adhesive area

114a second primary adhesive area

114b second secondary adhesive area

120 attachment member

122 plate-shaped member

124 upper surface

126 lower surface

128 guiding member

130 first edge

132 second edge

134 third edge

136 fourth edge

D direction of movement

H height

<D angle

200 method for manufacturing

202 providing wind turbine blade parts

204 providing a first blade shell part 210 moving first gluing tool

212 applying adhesive along first part

220 moving second gluing tool 222 applying adhesive along second part

230 providing second wind turbine blade part

232 contacting second wind turbine blade part to second adhesive area

234 providing third wind turbine blade part

236 contacting third wind turbine blade part to first adhesive area 240 assembling wind turbine blade

242 repositioning first mould

244 curing adhesive