A plastic welding machine for welding plastic parts together is capable of controlling the weld force vector in both magnitude and direction.

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.

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.

The invention relates to a method for producing flexible tube bodies (18) for packaging tubes from a film substrate (1) which has a print, preferably on an outer side (2), and which has or consists of at least one weldable plastic layer and which comprises a first longitudinal edge side (8), which extends in a longitudinal direction, and a second longitudinal edge side (8) parallel thereto and spaced apart therefrom, wherein the film substrate (1) is shaped by shaping means (23) to form a tube, and the two longitudinal edge sides (8, 8) are in particular welded to one another with the formation of a longitudinal weld seam, wherein a strip (12) is arranged, in the region of the abutment point and/or of the longitudinal weld seam, in the interior (17) of the film substrate (1) shaped to form the tube and is connected, in particular welded, to the longitudinal edge sides (8, 8) at least in certain regions or portions. According to the invention, prior to the formation of the longitudinal weld seam, at least one longitudinal edge side (8) is shaped, in particular cut, in such a way that, in the film substrate (1) shaped to form the tube, the longitudinal edge sides (8, 8) bear against one another, in particular in abutting fashion, radially only in the region of the outer side (2) with at least one tip (9) formed by the shaping operation.

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.