An arcuate fiber composite plastic preform and a method for the production of curved profiles with any fiber layer structure are disclosed, which include a layered fiber structure with a base and an arcuate outer contour, an inner edge and an outer edge. The fiber layer structure is configured with a first inner area provided with elevations and depressions, a second adjacent central area with no elevations and depressions and a third outer area and provided with radially oriented open recesses. The method of producing curved profiles from fiber composite plastic preforms having any fiber layer structure includes a molding step, whereby the outer area of the preform with wedge-shaped recesses is being compressed while the inner relief-shaped area is being completely stretched thereby flattening the relief.

A support mandrel for producing curved composite components includes a prismatoid mandrel body formed from a flexible material, the mandrel body having two polygonal bases and an upper support surface extending between the two polygonal bases of the mandrel body, and a reinforcement bar enclosed within the mandrel body and extending between the two polygonal bases of the mandrel body substantially parallel and near to the upper support surface of the mandrel body.

The drone comprises M antennas, with in particular two offset antennas located symmetrically at the ends of two arms for the connection to the propulsion units (24), and a ventral antenna under the drone body. The radio transmission is operated simultaneously on N similar RF channels, with 2?N<M. An antenna switching circuit couples selectively each of the N RF channels to N antennas out of the M antennas according to a plurality of different coupling schemes, dynamically through a piloting logic selecting one of the coupling schemes. The selection is operated as a function of a signal delivered by the drone-borne microprocessor, as a function of the flight and signal transmission conditions, determined at a given instant.

Device and method for the production of a mold having a fiber-reinforced support and connected therewith at least one add-on piece featuring synthetic material, with the device having at least one first tool component (10) and a second tool component (20), at least one of which is movable relative to the other; in this way, the device can be opened to insert a fiber-reinforced mat (30) between the respective pressing surfaces (11, 21) of the two tool components (10, 20), and closed for pressurizing and molding the mat (30), which produces the fiber-reinforced support, and with the second tool component (20) having at least one nozzle (22) to supply a liquefied synthetic material, and the first tool component (10) having at least one cavity (12) away from the nozzle to form the add-on piece, characterized in that the second tool component (20) has at least one cavity (24) at the nozzle so that the add-on piece can be produced and integrated by introducing synthetic material through the nozzle (22) and through the mat (30) into the cavity (12) away from the nozzle and the cavity (24) at the nozzle and hardening it therein.

A product includes a first concave portion and a second concave portion on a curved surface and a third concave portion on an opposite side of the second concave portion from the first concave portion. A first direction from a bottommost point of the first concave portion to a midpoint between the first and second opening ends of the first concave portion is different from a third direction from a bottommost point of the third concave portion to a midpoint between the first and second opening ends of the third concave portion. A second direction from a bottommost point of the second concave portion to a midpoint between the first and second opening ends of the second concave portion is a direction between the first and third directions. A reference line passing through the first and second opening ends of the third concave portion is orthogonal to the third direction.

An arch-shaped corrugated chamber having corrugation peaks and valleys, with reinforcing ribs provided on the corrugation peaks. The ribs extend upwardly from a chamber base to a rib upper end, and have an arch-shaped cross-section with an outer surface extending outwardly from a corrugation peak and a fin extending inwardly from the corrugation peak, and optionally, a rib line provided on the rib outer surface on the rib arch-shaped cross-section. A channel formed by the inner surface of the rib is sized to receive a corresponding rib of a second chamber so that multiple similar chambers with ribs may be stacked together.

A device for producing a mold part. The device includes a first tool component and a second tool component. The first tool component has a first pressing surface and a first cavity. The second tool component has second pressing surface, a second cavity, and a nozzle configured to supply a liquefied synthetic material. The first and second cavities are configured to overlap at least partially in a cross-section perpendicular to the first and second pressing surfaces when the first and second pressing surface face each other. At least one of the first and second tool components is configured to be movable relative to another.

An arch-shaped corrugated chamber having corrugation peaks and valleys, with reinforcing ribs provided on the corrugation peaks. The ribs extend upwardly from a chamber base to a rib upper end, and have an arch-shaped cross-section with an outer surface extending outwardly from a corrugation peak and a fin extending inwardly from the corrugation peak, and optionally, a rib line provided on the rib outer surface centered on the rib arch-shaped cross-section. A channel formed by the inner surface of the rib is sized to receive a corresponding rib of a second chamber so that multiple similar chambers with ribs may be stacked together.

A shaping method and a shaping device are provided which can easily and inexpensively form a curved face in a film including a micropattern. A shaping method is for forming, in a predetermined shaping-target area of a film including a patterned face with a micropattern, and a rear face opposite to the patterned face, a curved face beyond the thickness of the film, and includes a fixing step for fixing an outer edge of the shaping-target area of the film by fixing means, a first heating step for heating the film 20 by heating means 95, and a pressure adjusting step for producing a predetermined pressure difference between both faces of the film by the pressurizing means in such a way that pressure at a side where the film is fixed in the fixing step becomes small to form a pre-curved face.

A method for producing a three-dimensional fiber composite component with fiber bundles which are shaped from a rod- or strand-like initial shape into a predetermined three-dimensional shape of the component by way of a shape defining apparatus. The shape defining apparatus has at least one shaping channel having a first curvature along its longitudinal direction, which is predetermined for the fiber composite component, and forms at least one leading edge. The fiber bundles are pressed against the at least one leading edge of the shaping channel, thereby adopting the predetermined first curvature.