A method for forming a connection between two tubular sections having a polymeric outer surface jacket, using electrofusion to fusion bond a casing of similar, non-crosslinked polymer to the outer surface of the tubular sections.

Systems and methods for securing a product joint with a lattice structure. A system includes at least one fabricating system to create a connector with the lattice structure. A force system applies a force to the connector so that a material of the product flows into the lattice structure interweaving the material with the lattice structure to secure the joint by the lattice structure.

A method of resistive implant welding carbon fiber thermoplastic composites which includes providing at least two portions of a component formed with carbon fiber material, the at least two portions of the component each have a welding surface where the at least two portions of the component are welded together. One or more conductors of copper or aluminum mesh material positioned between the welding surface of the two portions. The method includes a forming tool having at least two portions capable of moving between an open position and a closed position. The forming tool has a welding region with non-conductive metal surface areas where electric current is selectively applied to facilitate the welding together of the at least two portions of the component. The forming tool has forming regions with conductive surfaces where the two components are shaped.

A method and an apparatus for welding together a first object and a second object. The method comprises applying a layer of carbon nanotubes onto a surface of the first object and bringing the first object and the second object into contact, such that the layer of carbon nanotubes on the surface of the first object is in contact with a surface of the second object. The method further comprises applying a voltage to the layer of carbon nanotubes, such that an electrical current flows through the layer of carbon nanotubes, wherein material of the first object adjacent to the layer of carbon nanotubes and material of the second object adjacent to the layer of carbon nanotubes is heated and melted by the electrical current and thereby welded together. Further, an apparatus for welding together a first object and a second object is presented.

A rotary cylindrical mould member and a method for its production, is adapted to be used in a system for moulding three-dimensional products from a mass of one or more food starting materials which are suitable for consumption. The method includes preparing at least one mould body forming part of the cylindrical outer surface of the mould member, wherein one or more recessed mould cavities are formed. Subsequently preparing a support member defining one or more fluid channels, recessed in the support surface Heat emitting parts or particles are provided close to the inner surface of the mould body and/or the supporting surface of the support member. Energy is provided to the heat emitting parts or particles, thereby causing the parts or particles to emit heat and thereby locally melt the adjacent porous first plastic and the second plastic to obtain a weld and thereby secure the support member and the mould body to each other.

An implant for electric resistance welding of elements made of composites, with a frame of thermoplastic materials, reinforced with conductive fibres, in a flat multilayered structure with an upper and lower surface, and includes an electrically resistant layer of a flat sheet with openings, made of a conductive material, additional layers made of the frame material, one of which covers the electrically resistant layer from the top, and the other one from the bottom. The implant includes porous insulating layers made of an electrically nonconductive material, one covers the implant from the top, contacting the upper layer of the frame material, and the other covers the implant from the bottom, contacting the lower layer of the frame material. The layers are merged with each other in a flat, multilayered inset placed between the welded elements, and the electrically resistant layer has electrical connections for connecting a source of electrical current.

Apparatus (10) and associated method for joining thermoplastic composite components (66, 68) to one another. Firstly, an electrically-conductive carbon-fibre textile (74) is positioned between two pieces of thermoplastic composite (66, 68) to form a weldable assembly (64), and pressure is applied to the weldable assembly (64). A voltage is then applied across the carbon-fibre textile (74) to heat the carbon-fibre textile (74), thereby melting the thermoplastic (82) of a carbon-fibre textile facing surface (78, 80) of each thermoplastic composite (66, 68), wherein the melted thermoplastic (82) fluidly fills the inter-fibre space (84) of the carbon-fibre textile (74). Upon removing the voltage to allow the carbon-fibre textile (74) to cool, a weld (86) forms between the two thermoplastic composites (66, 68) as the thermoplastic sets.

A method for producing a rotor blade of a wind turbine includes the following steps: a) providing at least two different components of the rotor blade, b) placing a resistive element between the components, c) placing a thermoplastic or weldable thermoset resin between the components, d) energizing the resistive element so that the resistive element applies heat to the thermoplastic or weldable thermoset resin to melt or to soften it, and e) joining the components together by means of the molten or softened thermoplastic or weldable thermoset resin.

A method for assembling a rotor blade of a wind turbine: a) providing at least two different rotor blade modules that segment the rotor blade along a longitudinal direction thereof, wherein each rotor blade module has a sloped interface section that include a weldable thermoplastic resin and/or a weldable thermoset resin (M, b) providing a resistive element, c) arranging the rotor blade modules and the resistive element in such a way that sloped interface sections face each other and the resistive element is sandwiched between the sloped interface sections, d) energizing the resistive element to apply heat to a weldable thermoplastic resin and/or the weldable thermoset resin to melt or to soften it, and e) joining the sloped interface sections together at a joint by means of the molten or softened weldable thermoplastic resin and/or the weldable thermoset resin to form the rotor blade.