Abstract: A forming device and a method of manufacture of a fillet of plastic for aircraft assemblies. The fillet has a pre-determined profile for filling a cavity of a structural element. The fillet is formed using a former of a forming device. The method includes applying at least one blank of a base material of plastic between at least two opposed press beds of the former and at least one of the press beds including an elongated groove. At least one press bed is towards another press bed, until the press beds are in position for completed compression of the fillet. Each groove for forming of the fillet generates a fillet in correspondence with the pre-determined profile. The press beds are separated from each other for releasing the formed fillet. The formed fillet is removed from the former. The formed fillet is applied in the cavity.

Abstract: A method for producing an object of composite material comprising the steps of: placing one or several prepregs on a plane surface, forming a fiber stack; lifting over the fiber stack to a molding tool; downforming the fiber stack; curing the downformed fiber stack; where the method also comprises the step of: orienting the fiber directions so that all fibers, when the fiber stack is lifted over to the molding tool, will cross an edge of the molding tool only once.

Abstract: A thermoforming apparatus for forming a blank into a composite article. The thermoforming apparatus includes a forming tool. A forming member forms the blank over the forming tool. A first chamber is arranged for containing the blank. A second chamber is separated from the first chamber by the forming member. A first air circulator is configured to circulate air in the first chamber for achieving a heat distribution to the blank. The first air circulator includes a controllable valve member. The apparatus also includes a second air circulator. A method for forming a blank during circulation of air in a first chamber.

Abstract: A method of attaching a first portion and a second portion to each other. An adhesive is exposed to a low temperature in order to obtain a non-tacky adhesive. The non-tacky adhesive is arranged between the two portions. The adhesive is cured. Use of adhesive according to the method.

Abstract: A method for manufacturing a hollow load-bearing beam structure of fiber-reinforced composite material. The method includes preparing a first lay-up of a first plurality of layers, and a second lay-up of a second plurality of layers. The first and second lay-ups are positioned on different sides of a mandrel and formed to a beam structure by bending the lay-ups against the mandrel, such that the side edges of the respective layers of the first and second lay-ups are arranged as offset butt joints in the circumferential direction of the formed beam structure.

Abstract: In a method and a tool for forming an elongate, hollow article of a fiber-reinforced composite material one end of an article laminate applied to a tool bar is placed in engagement with or is supported by an anvil of the tool so as to control the direction of longitudinal movement of the cured article relative to the tool bar during the cooling and dismantling phase.

Abstract: A helical tool (1?, 1?) having a rigid outer helical support surface (2) is used as support for a non-rigid material for producing a hollow elongated member onto and as an integral part with a surface member (3) in manufacturing of a surface member having at least one hollow elongated stiffening member integral therewith.

Abstract: A method of attaching a first portion and a second portion to each other. An adhesive is exposed to a low temperature in order to obtain a non-tacky adhesive. The non-tacky adhesive is arranged between the two portions. The adhesive is cured. Use of adhesive according to the method.

Abstract: A thermoforming apparatus for forming a blank into a composite article. The thermoforming apparatus includes a forming tool. A forming member forms the blank over the forming tool. A first chamber is arranged for containing the blank. A second chamber is separated from the first chamber by the forming member. A first air circulator is configured to circulate air in the first chamber for achieving a heat distribution to the blank. The first air circulator includes a controllable valve member. The apparatus also includes a second air circulator. A method for forming a blank during circulation of air in a first chamber.

Abstract: A method and a tool component for forming in an article of fiber-reinforced composite material at least one locally placed, sharply curved portion. A separate, substantially rigid pressure-transferring element configured with a profile corresponding to the at least one curved portion is placed over the laminate at the location of the at least one locally placed, sharply curved portion of the mold surface. A flexible membrane placed over the laminate and over outer, separated surfaces of the pressure-transferring element is evacuated to depress the laminate to fully conform to the shape of the mold surface.

Abstract: In a method and a tool for forming an elongate, hollow article of a fiber-reinforced composite material one end of an article laminate applied to a tool bar is placed in engagement with or is supported by an anvil of the tool so as to control the direction of longitudinal movement of the cured article relative to the tool bar during the cooling and dismantling phase.

Abstract: A method for manufacturing a hollow load-bearing beam structure of fiber-reinforced composite material. The method includes preparing a first lay-up of a first plurality of layers, and a second lay-up of a second plurality of layers. The first and second lay-ups are positioned on different sides of a mandrel and formed to a beam structure by bending the lay-ups against the mandrel, such that the side edges of the respective layers of the first and second lay-ups are arranged as offset butt joints in the circumferential direction of the formed beam structure.

Abstract: A method and a tool component for forming in an article of fiber-reinforced composite material at least one locally placed, sharply curved portion. A separate, substantially rigid pressure-transferring element configured with a profile corresponding to the at least one curved portion is placed over the laminate at the location of the at least one locally placed, sharply curved portion of the mold surface. A flexible membrane placed over the laminate and over outer, separated surfaces of the pressure-transferring element is evacuated to depress the laminate to fully conform to the shape of the mold surface.

Abstract: A method for producing an object of composite material comprising the steps of: placing one or several prepregs on a plane surface, forming a fibre stack; lifting over the fibre stack to a moulding tool; downforming the fibre stack; curing the downformed fibre stack; where the method also comprises the step of: orienting the fibre directions so that all fibres, when the fibre stack is lifted over to the moulding tool, will cross an edge of the moulding tool only once.

Abstract: The present invention relates to a forming device (1) and a method of manufacture of a fillet (17) of plastic for aircraft assemblies or the like, said fillet (17) having a pre-determined profile (9) for filling a cavity (61) of a structural element (59), the fillet (17) being formed using a forming means (29) of a forming device (1).

Abstract: A helical tool (1?, 1?) having a rigid outer helical support surface (2) is used as support for a non-rigid material for producing a hollow elongated member onto and as an integral part with a surface member (3) in manufacturing of a surface member having at least one hollow elongated stiffening member integral therewith.

Abstract: The invention concerns a method for reinforcing a double-shell structure in which a cellular core (2) is arranged between a first shell (5) and a second shell (6). In the method according to the invention, at least one cavity is formed in the double-shell structure from an opening in the first shell into the cellular core (2) so that the cavity substantially extends through the cellular core (2) to the second shell. Fixative (8) is injected into the cavity. A stiff bar (7) is introduced into the cavity, whereupon excess fixative (8) is allowed to pass out of the cavity. Finally, the fixative left in the cavity is cured.

Abstract: Method for repairing a damaged or defective part (2) of a composite or sheet-like article (1). The method comprises the steps of placing a repair patch (3) over the damaged or defective part of the article, locating a pressure chamber including moulding tool means (7) over at least the damaged or defective part (2) of the article (1) and curing. The method comprises the further step of applying a viscous material (5) in the vicinity of the damaged or defective part (2) of the article (1) before curing and heating the viscous material (5) so that it becomes less viscous and flows into any undesired gaps between the moulding tool means (7) and the article (1).

Abstract: This invention concerns a method for reinforcing a core (2) constructed of at least two core parts (2a, 2b, 2c, 2d), each of which exhibits a top side, a bottom side and walls joining the top side and bottom side. The core parts (2a, 2b, 2c, 2d) are arranged joined wall-to-wall with one another along a joint seam (4a, 4b, 4c) filled with glue, preferably in the form of a glue film. The method is characterized in that notches (5a, 5b, 5c) are realized in a number of places in the glue joint, which notches extent between the walls from the top side to the bottom side of the core parts so that the glue joint can be divided into pieces. The invention also encompasses an article fabricated in accordance with the aforementioned method.

Abstract: The invention concerns a holding device for holding an item (3) in connection with hardening of the item under elevated pressure in a pressure tank. The holding device includes one or more support elements that entirely or partly surround the lateral surfaces of the item and are arranged to support the item (3) during hardening. The holding device is characterized in that at least one of the support elements (4a) is arranged in relation to the item in such a way that the support element (4a) presses, in a first region along its length, against the item with a pressure that is elevated relative to the pressure-tank pressure and, in a second region along its length, presses against the item with a pressure that is lower relative to the pressure-tank pressure.