Method of bonding a shear web (50) to a wind turbine blade shell (75) and the obtained blade, wherein the shear web (50) comprises a web and a mounting flange (56) oriented transverse to the web (50). The method involves: providing a seal (66, 68) on the mounting flange (56) of the shear web (50) such that when the mounting flange (56) is positioned against the blade shell (75), a cavity (76) is defined by the seal between the mounting flange (56) and the blade shell (75). The air of the cavity (76) is then evacuated and adhesive is injected into the cavity (76). The use of pieces (80) to keep the distance between the mounting flange (56) and the blade shell (75) is preferred.

A blade shell part for a wind turbine blade and a wind turbine blade are disclosed. The blade shell part is made of a composite structure comprising a reinforcement material embedded in a polymer matrix, the blade shell part extending from a tip end to a root end, wherein the blade shell part comprises: a blade shell body with a leading edge and a trailing edge, and a first glue flange extending from the leading edge and having a first glue flange edge and a first glue surface with a first width, wherein the first glue flange is provided with one or more spacer elements. Further, a method of manufacturing a wind turbine blade is described.

A method of attaching a tip extension to a wind turbine blade is described. The method comprises: fitting the tip extension over a tip end of the blade such that an overlap region is defined between an outer surface of the blade and an inner surface of the tip extension; and supplying adhesive to the overlap region via one or more holes provided in the tip extension to bond the tip extension to the blade. In preferred embodiments, adhesive dams are provided in the overlap region to define bond cavities and constrain the adhesive within the bond cavities. An assembly comprising a wind turbine blade and a tip extension bonded thereto is also described.

Described herein are techniques for reducing resin squeeze-out including a method comprising receiving a first component and a second component, where the first component is configured to be joined to the second component at an overlap area using an adhesive layer to form a structure having a ledge. The method further comprises applying the adhesive layer to the overlap area on the first component. The method further comprises selectively curing a portion of the adhesive layer adjacent to the ledge. The method further comprises forming the structure by combining the first component, the second component, and the adhesive layer and curing a remainder of the adhesive layer.

A method for welding two hollow profiled rods made of plastic to form a window frame. The profiled rods to be joined together are heated to a predetermined temperature by inserting a welding plate between their connecting surfaces and pressing the same against the welding plate, forming outer and inner beads, and the profiled rods are pressed together under pressure after removing the welding plate, with a simultaneous increase in the size of the weld bead. For all cross sections of the profiled rods and the plastics used for manufacturing the window frames, to obtain a type of shadow groove on the top side and/or front side and on the bottom side and/or rear side of the finished window frame in the area of or near the connecting sites of the finished window frame, only the outer beads formed on the visible surface of the subsequent window frame in the area of or near the connecting sites of the two profiled rods are pressed slightly inward after removing the welding plate forming an oblique edge, and then are removed together with the inner beads, and then the connecting surfaces of the two profiled rods are joined together.

At least two profiled parts (1) are fixed to profile supports (2) that can be moved relative to each other. The profiled parts (1) are each partially melted at an end joining face (10) with a heating element (5) in a melting step and, after the heating element (5) has been removed, the partially melted joining faces (10) of the profiled parts are pressed against each other in a joining step, until the molten materials brought into contact with each other there cool down and solidify, forming a welded connection. To avoid or reduce occurrence or development of a welding bead, in a separating step that is carried out before the joining step, a mating tool (6, 29) is guided through the melt along the separating edge (9) of the limiting element (3), in order to separate the excess melt (7) that has escaped over the separating edge (9).

A welding apparatus is suitable for welding polymeric materials, and particularly but not exclusively those that may be thin or brittle. A welding apparatus is provided for welding polymeric materials along a weld zone of the polymeric material. The welding apparatus has a carrier for supplying heat to the weld zone to cause melting of the polymeric material, wherein the heating element is arranged to reciprocate relative to the carrier between a retracted and an extended configuration, such that as the element moves from the retracted to the extended configuration the heating element melts and penetrates the surface of the polymeric material. The carrier also has a trailing contact surface trailing the heating element along the weld zone arranged to constrain molten polymeric material in the weld zone. The heating element is also arranged to reciprocate relative to the trailing contact surface.

A method for producing a bonded plate-shaped assembly includes retaining a pair of plate-shaped members facing each other by a pair of retaining base members; charging a photo-curable liquid material between the pair of plate-shaped members facing each other; causing movement of the pair of retaining base members by a retaining base member movement unit to cause the pair of plate-shaped members to draw close to each other to cause wetting spreading of the liquid material between the pair of plate-shaped members; detecting a wetting spreading state of the liquid material by a sensor; and illuminating curing light, in response to the result of detection, to the liquid material wettingly spread to the entire surfaces of the pair of plate-shaped members, to form the bonded plate-shaped assembly made up of the pair of plate-shaped members bonded together.

An apparatus for manufacturing rectangular frames of plastic material includes an apparatus frame and welding heads. A material clamp cooperates with an associated frame member to hold the associated frame member in a desired location during a frame assembly operation. A heat plate is movably attached to each welding head. The heat plate can be selectively positioned to an operating position. The material clamp positions the associated frame member in close proximity to the heat plate to heat a set of ends of the associated frame member utilizing only radiation and convection of heat developed by the heat plate. The plurality of welding heads exert pressure on adjoining associated frame members after the heat plate is removed from the operating position in order to weld the adjoining associated frame members together to form a rectangular frame.

The terminal portion of a prefabricated skirt is connected to a casing of a thruster body in the vicinity of an end wall thereof using a method including positioning the terminal portion of the skirt with circumferential clearance around the casing of the thruster body in the vicinity of the end wall; keeping the skirt in position relative to the casing of the thruster body; closing both ends of an annular space between the terminal portion of the skirt and the casing of the thruster body; injecting elastomer into the annular space; and curing the elastomer.