Process for producing defined surfaces on fibre-composite components with a thermoplastic matrix

摘要

Fibre-composite components which are produced by a winding or braiding method in some cases have a rough outer surface. This is often not desired. When improving the surfaces by means of pressure rollers or pressure shoes, the adhering of fibres and matrix presents a problem. Displacements of the fibre layers occur, the pulling out of individual fibres and in some cases damage to the fibres. With the process according to the invention, these problems are avoided. A metallic strip (3) with a defined, in particular smooth, surface is wound under pretension onto the molten component (1) and is unwound again after cooling of the matrix. In this way, the rough surface texture (a) is transformed into a defined surface (d). The spiral burr (c) can be removed subsequently by means of a cutter (4). The process permits the production of defined outer surfaces on fibre-composite components produced by the winding or braiding method with a thermoplastic matrix. Damage to and displacements of the fibres are avoided, and it can be integrated well into the respective production process. <IMAGE>