Plastic profiles are produced by a pultrusion method. For this, a mold is moved periodically relative to the stationary plastic profile and said profile is held by a holding means and transported away. In particular, the starting and the stopping of the method are problematical, since a tensile stress must be applied, by which both slack fibers and rigid profiles can be drawn through the mold. The invention creates a method and a device for simple and reliable manufacture of plastic profiles. For this, it is provided that at least one cross section of a receiving space of the at least one holding means is changed along a longitudinal axis of the holding means in order to grasp a reinforcement and/or the plastic profile.

A head is disclosed for use with a manufacturing system. The head may have a housing configured to discharge a tubular structure reinforced with at least one continuous fiber and having a three-dimensional trajectory, and a cure enhancer operatively connected to the housing and configured to cure a liquid matrix in the tubular structure during discharge. The head may also have a nozzle configured to discharge a fill material into the tubular structure, and a wand extending from the housing to the nozzle.

A method for manufacturing a part for a wind turbine blade, and in particular a part of a shear web for a wind turbine blade, is described. The method comprises pultruding the part, wherein an in-line shaping of the part is performed, to provide a part having a cross-sectional profile which varies in the longitudinal length of the part. Providing a shear web having a portion which varies in cross-sectional profile results in production of a wind turbine blade part which can be accurately controlled to have precise geometrical profile corresponding to a desired blade profile, with minimal waste of materials.

There is provided a standard block made of fiber-reinforced plastic (FRP), including a first slot and a second slot parallel to the first slot on the top surface of the standard block; a third slot and a fourth slot parallel to the first slot on the bottom surface of the standard block; a fifth slot parallel to the first slot on the right side surface of the standard block; and a sixth slot parallel to the first slot on the left side surface of the standard block.

A die or die assembly for forming a bundle of fibres into a rod or tube comprises a body (84) defining a passage 86) for conducting the bundle fibres through the die from an inlet to an outlet, a constriction (91) in the passage having an entrance shaped to form the fibres of the bundle into a desired configuration as the bundle passes through the die, and one or more conduits (92) through which a treatment fluid e.g. steam, for curing the bundle of fibres may be introduced into the passage, and wherein at last one conduit is arranged to discharge fluid in the immediate vicinity of the entrance to the constriction to facilitate passage of the fibres through the die and reduce the risk of blockage.

The present invention is directed to a method of manufacturing a fibre-reinforced polymer composition comprising the steps of providing at least one multifilament strand comprising a plurality of continuous fibre filaments, applying an impregnating agent to said strand to form an impregnated continuous multifilament strand, and embedding the impregnated continuous multifilament strand in a thermoplastic polymer material for providing said fibre reinforced polymer composition, wherein said impregnating agent has a low viscosity at application temperature and is applied by jetting said impregnating agent onto the at least one continuous multifilament strand. The invention is further directed to a device for use in such a method.

A pultruded strip (50) of reinforcing material for stacking with one or more similar strips (50) to form a spar cap for a wind turbine blade is disclosed. The pultruded strip comprises a core (56) comprising fibres (58) disposed in a resin matrix (60) and a sacrificial layer (52) at least partially covering one or more surfaces of the core (56). The sacrificial layer (52) is a resin layer defining an adherend surface (62A) of the strip. A pultrusion process for making such a strip (50) comprises drawing resin-coated reinforcing fibres (58) through a pultrusion die (80) in a process direction to form a core (56) of the strip (50) and applying further resin (53) to one or more surfaces of the core (56) to form a sacrificial resin layer (52) defining an adherend surface (62A) of the strip (50).

An injection box for a pultrusion system, the injection box comprising: a housing which has at least one fibre supply opening for supplying fibres, in particular glass fibres, carbon fibres or aramid fibres; an injection connection provided on the housing for injecting a liquid matrix material; and a delivery opening for delivering the fibres impregnated with the matrix material to a curing tool; wherein the output opening has a substantially circular cross-section.

Aspects of the disclosure relate to methods and systems for producing a preferably strand-like extrudate.

A soft material extruder including a housing having a cavity, an inlet configured to receive a material and an outlet. The extruder also includes a first intermeshed gear pair positioned in the cavity proximate the inlet, the first intermeshed gear pair that when driven is configured to draw material from the inlet into the cavity, a heating element positioned in the cavity proximate the outlet, wherein the heating element is configured to melt material in the vicinity of the outlet and a second intermeshed gear pair positioned in the cavity proximate the outlet, the second intermeshed gear pair forming a gear pump that when driven is configured to push molten material towards the outlet so that molten material is expelled from the outlet.