METHOD AND MOULD SYSTEM FOR NET MOULDING OF A CO-CURED, INTEGRATED STRUCTURE
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United States of America Patent
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app pub date -
Feb 17, 2012
filing date -
Feb 17, 2012
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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.
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