Abstract: The present invention relates to a mould system and a method for net moulding of a co-cured integrated structure (1) comprising a skin (26) provided with stringers (4) and rib feet (2) and with a gap (6) between the stringers (4) and the rib feet (4). The mould system comprises a substantially rectangular frame (12) made of a low heat expanding material, a number of substantially rectangular boxes (8) made of a heat expanding material, connection plates (16) made of a heat expanding material and fastening means (14). By means of the connection plates (16) the gap (6) is obtained. A moulding assembly (64) is created by applying prepregs to the surfaces of the boxes (8), by connecting the boxes (8) to each other and by surrounding the connected boxes (8) with the frame (12). The moulding assembly (64) is treated in a conventional way in an autoclave in order to cure the structure (1). Thereafter the frame (12), the boxes (8) and the connection plates (16) are removed.

Abstract: The invention refers to a plant and a holding device in connection with heat treatment of articles (3), which is at least partly manufactured in a thermosetting composite material. The holding device, which is comprised by the plant, includes a base element (1), and intermediate element (2), which rests on the base element (1), and at least a support member (4), which is fixable to the intermediate element (2) and arranged to support said article (3) on the intermediate element during the heat treatment. The intermediate element (2) is manufactured in a material which has a neglectable thermal extension at least up to a temperature level, at which the heat treatment is intended to take place. Furthermore, the intermediate element (2) is displaceably positioned on the base element (1).

Abstract: The invention refers to a plant and a holding device in connection with heat treatment of articles (3), which is at least partly manufactured in a thermosetting composite material. The holding device, which is comprised by the plant, includes a base element (1), and intermediate element (2), which rests on the base element (1), and at least a support member (4), which is fixable to the intermediate element (2) and arranged to support said article (3) on the intermediate element during the heat treatment The intermediate element (2) is manufactured in a material which has a neglectable thermal extension at least up to a temperature level, at which the heat treatment is intended to take place. Furthermore, the intermediate element (2) is displaceably positioned on the base element (1).