The invention relates to a process (100) for manufacturing an object (1) made of thermoplastic polymer composite from at least two parts (10) made of thermoplastic polymer composite, said thermoplastic polymer composite comprising a fibrous reinforcement and a thermoplastic polymer matrix, said process comprising the steps of:

arranging (120) the two parts (10) made of thermoplastic polymer composite adjacently or overlapping at an assembly interface zone (11), and

heating (130) to melt the thermoplastic polymer matrix at said assembly interface zone (11), so as to form an object (1) made of thermoplastic polymer composite comprising a welded interface (12).

A method and device for connecting and repairing a shear web includes the method steps of dry-fitting a shear web insert in a rotor blade assembly to establish a perimeter gap at an angled perimeter interface between the shear web insert and the rotor blade assembly, the angled perimeter interface positioned between the shear web insert and at least one adjacent surface of a first shear web, a second shear web, a first side of the rotor blade assembly, and a second side of the rotor blade assembly, and then injecting a bonding paste into the perimeter gap. The rotor blade assembly can include a connecting device having at least one pre-fabricated clip.

A pipe elbow has a first end and a second end off parallel to the first end. An interior surface of the pipe elbow has a centerline having an arcuate portion. A circular cylindrical exterior surface portion of the pipe elbow surrounds the arcuate portion of the centerline.

Methods for joining a first blade component and a second blade component of a rotor blade together includes printing and depositing, via a computer numeric control (CNC) device, at least one three-dimensional (3-D) grid structure at a first joint area of the rotor blade. The first joint area contains the first blade component interfacing with the second blade component. The method also includes providing an adhesive at the first joint area to at least partially fill the grid structure. Further, the method includes securing the first blade component and the second blade component together at the first joint area via the adhesive.

The application relates to a method for producing a moulded part assembly from a first plastic moulded part and a second plastic moulded part by means of laser welding, wherein the first plastic moulded part consists at least partially of a first material and the second plastic moulded part consists at least partially of a second material that can be welded to the first material, wherein a welding region of the second plastic moulded part is arranged in a stepped receiving means of the first plastic moulded part, or vice versa. According to the invention, during the laser welding, the first plastic moulded part and the second plastic moulded part are to be shifted onto one another in a shifting direction. The invention also relates to a production device for producing a moulded part assembly.

A method and device for connecting and repairing a shear web includes the method steps of dry-fitting a shear web insert in a rotor blade assembly to establish a perimeter gap at an angled perimeter interface between the shear web insert and the rotor blade assembly, the angled perimeter interface positioned between the shear web insert and at least one adjacent surface of a first shear web, a second shear web, a first side of the rotor blade assembly, and a second side of the rotor blade assembly, and then injecting a bonding paste into the perimeter gap. The rotor blade assembly can include a connecting device having at least one pre-fabricated clip.

A method of applying protective sheeting of polymer material to a pipeline extending along a longitudinal axis and having a cutback bounded at opposite axial ends by two end portions of respective protective coatings of polymer material, the method including directly heating the free faces of the end portions; extruding and simultaneously winding about the pipeline a protective sheeting wide enough to cover the cutback and the end portions; and compressing the protective sheeting against the pipeline, the end portions included.

Rotor blades and methods for joining shear clips in wind turbine rotor blades are provided. A method includes positioning the shear clip adjacent a shear web of the rotor blade, the shear clip including a thermoplastic resin, the shear web including a thermoplastic resin. The method further includes welding the thermoplastic resin of the shear clip and the thermoplastic resin of the shear web together. The method further includes positioning the shear clip adjacent a spar cap of the rotor blade, the spar cap including a thermoplastic resin. The method further includes welding the thermoplastic resin of the shear clip and the thermoplastic resin of the spar cap together. The method further includes joining the shear web and the spar cap together.

A fitting holder designed for receiving a branch pipe during a welding operation in order to attach the branch pipe to a pipeline or a pipe, wherein differently dimensioned branch pipes can be received by the fitting holder, comprising a hollow-cylindrical housing with an upper region which, during the welding, faces away from the pipeline to be welded thereto, and a lower region which, during the welding, faces the pipeline to be welded thereto, wherein mounts for the axial fixing of the branch pipe which can be received by the fitting holder are arranged in the lower region, a ring arranged displaceably in the housing, and clamping elements pressing the ring downwards, wherein the fitting holder has different guide inside diameters which guide the differently dimensioned branch pipes by way of their differently dimensioned outside diameters in the fitting holder.

Methods and apparatuses are disclosed relating to multilayer 3D textile composite materials containing self-healing resins for use as protective structures on stationary objects, and moving objects including, without limitation, vehicles including spacecraft and aircraft.