Method for producing a three-dimensional preform
This invention relates to a method for the production of a producing a three-dimensional preform from textile starting materials such as fibers, fiber bundles or tapes. The textile starting materials are laid in a plane in a two-dimensional manner, whereby the orientation of the fibers and the geometry of the two-dimensional bonded fabric have been determined from the three-dimensional target form by means of back-calculation. The three-dimensional target form is produced by shaping/draping the two-dimensional bonded fabric.
1 . Method for the production of a three-dimensional preform from textile starting materials such as fibers, fiber bundles or tapes, characterized in that
a) the textile starting materials are laid two-dimensionally in a plane, whereby the orientation of the fibers and the geometry of the two-dimensional bonded fiber has been back-calculated from the three-dimensional target form,
b) the three-dimensional target form is produced by shaping/draping of the two-dimensional bonded fiber.
2 . Method as claimed in claim 1 , characterized in that after Step b), a compacting is performed.
3 . Method as claimed in claim 1 or 2 , characterized in that fibers, fiber bundles or tapes are used as textile starting materials.
4 . Method as claimed in at least one of the claims 1 to 3 , characterized in that mechanical fixing means and/or a binder are used for fixing.
5 . Method as claimed in claim 4 , characterized in that pins, clamp elements, adhesive strips or brushes are used as fixing means.
6 . Method as claimed in claim 4 , characterized in that the textile starting materials are fixed by sewing.
7 . Method as claimed in claim 4 , characterized in that the textile starting materials are fixed by the introduction of a binder before, during or after the shaping/draping process.
8 . Method as claimed in at least one of the claims 1 to 7 , characterized in that pre-impregnated textile materials such as fibers or fiber bundles are used as textile starting materials.
9 . Method as claimed in at least one of the claims 1 to 8 , characterized in that after Step a) of the method, the two-dimensional bonded fabric is removed and cut to size if necessary and fed to the three-dimensional shaping/draping process.
10 . Method as claimed in at least one of the claims 1 to 9 , characterized in that, after Step b) of the method, the three-dimensional preform is cut to size.