Lm Glasfiber A/s

Morten Stage

Tommy Mikkelsen

Tommy Mikkelson

Provided is a composite structure having a longitudinal direction and a transverse direction, having a longitudinally extending fiber insertion having a plurality of fiber layers, a first surface, a second surface, a first side, and a second side; a fiber insertion first zone at the first side of the fiber insertion; a fiber insertion second zone at the second side of the fiber insertion; an intermediate zone separating the first zone and the second zone; a distribution medium adjacent at least one of the first side and the second surface of the intermediate zone, the distribution medium comprising a resin distribution network; and a cured resin impregnating at least the resin distribution network and the fiber insertion.

Method for producing a composite structure and a composite structure

A use of a core block for an impregnation process as well as a composite structure comprising such a core block is described. The core block has a first surface and a second surface, and a number of first grooves is formed in the first surface of the core. Furthermore, a number of second grooves is formed in the second surface of the core. The first grooves have a first height (h1) and a bottom, and the first grooves and the second grooves are part of a resin distribution network formed in the core block. The distance (t) between the bottom of the first grooves and the second surface of the core block is of such a size that the core block is flexible along the first grooves. Additionally, the sum of the first height and the second height is larger than the thickness of the core block, and at least one of the first grooves in the first surface of the core block crosses at least one of the second grooves in the second surface of the core block.

Method of using a formable core block for a resin impregnation process

A use of a core block for an impregnation process as well as a composite structure comprising such a core block is described. The core block has a first surface and a second surface, and a number of first grooves is formed in the first surface of the core. Furthermore, a number of second grooves is formed in the second surface of the core. The first grooves have a first height (h) and a bottom, and the first grooves and the second grooves are part of a resin distribution network formed in the core block. The distance (t) between the bottom of the first grooves and the second surface of the core block is of such a size that the core block is flexible along the first grooves. Additionally, the sum of the first height and the second height is larger than the thickness of the core block, and at least one of the first grooves in the first surface of the core block crosses at least one of the second grooves in the second surface of the core block.

A method for producing a composite structure and a composite structure obtained by the method is described. The method comprises the following steps: a) providing a mold comprising a rigid mold part and a flexible vacuum bag, b) placing a fiber insertion in the mold part, the fiber insertion including a plurality of fiber layers and, when placed in the mold part, having an upper surface and a lower surface as well as a first side and a second side, the fiber insertion including a first zone at the first side and a second zone at the second side, the first zone and the second zone being separated by an intermediate zone, c) placing an upper distribution medium above the intermediate zone of the fiber insertion, the distribution medium comprising a resin distribution network for distributing resin along the upper distribution medium, d) placing a number of resin inlet channels above the upper distribution medium for supplying liquid resin to the resin distribution network, e) placing a first vacuum outlet at least partially overlapping the first zone of the fiber insertion and a second outlet at least partially overlapping the second zone of the fiber insertion, f) placing the vacuum bag on top of the mold part, thus sealing the vacuum bag against the mold part to define a mold cavity, g) evacuating the mold cavity, h) connecting a source of uncured fluid resin to the resin inlet channels so as to feed uncured resin to the resin distribution network in order to fill the mold cavity and to impregnate at least the fiber insertion and the upper distribution medium with uncured resin, and i) allowing the resin to cure in order to form the composite structure.

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Rodding, Denmark

Morten Stage