Method for producing a component from a fiber-reinforced material
View Patent ↗The invention relates a method for producing a component from a fiber-reinforced material, wherein a fibrous preform which consists of fibers and an uncured polymer matrix is positioned on a mold, and a thermoelectric film is positioned on the fibrous preform and/or on the mold, and said thermoelectric film is heated up by exposure to microwaves when a negative pressure or vacuum is applied and, as a consequence of this, heats up the fibrous preform while curing the polymer matrix.
1. A method for producing a component from a fiber-reinforced material, the method comprising: positioning a fibrous preform on a mold, the fibrous preform comprising fibers and an uncured polymer matrix, positioning a thermoelectric film on the fibrous preform and/or on the mold, heating said thermoelectric film by exposure to microwaves while applying a negative pressure or vacuum and, as a consequence of this, heating up the fibrous preform while curing the polymer matrix.
2. The method as claimed in claim 1 , further comprising positioning the fibrous preform directly on a first side of the mold.
3. The method as claimed in claim 2 , further comprising positioning the thermoelectric film directly on the fibrous preform.
4. The method as claimed in claim 2 , further comprising positioning the thermoelectric film indirectly on the fibrous preform while interposing a separating film and/or a nonwoven.
5. The method as claimed in claim 4 , further comprising positioning the thermoelectric film on a second side of the mold, which is opposite from the first side of the mold and is facing away from the fibrous preform.
6. The method as claimed in claim 1 , wherein the thermoelectric film additionally acts as a vacuum film, which is sealed off with respect to the mold in such a way that a negative pressure or a vacuum can be set between the mold and the thermoelectric film, a negative pressure or a vacuum being set between the mold and the thermoelectric film for the curing of the polymer matrix of the fibrous preform by way of the exposure to microwaves.
7. The method as claimed in claim 1 , further comprising using a separate vacuum film in addition to the thermoelectric film and sealing off the vacuum with respect to the mold in such a way that a negative pressure or a vacuum can be set between the mold and the vacuum film, and setting a negative pressure or a vacuum between the mold and the vacuum film for the curing of the polymer matrix of the fibrous preform by way of the exposure to microwaves.
8. The method as claimed in claim 7 , further comprising positioning the vacuum film directly on the thermoelectric film, and positioning the thermoelectric film between the vacuum film and the mold.
9. The method as claimed in claim 7 , further comprising positioning the vacuum film directly on the fibrous preform, and positioning the mold between the thermoelectric film and the vacuum film.
10. The method as claimed in claim 7 , further comprising positioning the vacuum film directly on a separating film or a nonwoven, and positioning the mold being positioned between the thermoelectric film and the vacuum film.
11. The method as claimed in claim 1 , wherein the thermoelectric film is a segmented thermoelectric film with at least a region of defined first segments and a region of defined second segments, which is heated up by the exposure to microwaves exclusively in the region of defined first segments, whereas the segmented thermoelectric film is not heated up by the exposure to microwaves in the region of defined second segments.