**5. Conclusions**

This paper demonstrates the application of FFF to produce tools for sheet metal forming, exemplified by V-bending and grove pressing of aluminum sheets. The following conclusions can be drawn:


The results of this work show the high potential of polymer tools in sheet metal forming for small series or prototyping, but also that there is room for improvement and further research in the field.

**Author Contributions:** Conceptualization, F.T., A.B., U.A. and C.V.N.; methodology, F.T., A.B. and C.V.N.; software, U.A.; formal analysis, F.T.; investigation, F.T., A.B., U.A. and C.V.N.; data curation, F.T., A.B. and U.A.; writing—original draft preparation, F.T., A.B. and U.A.; writing—review and editing, F.T., A.B., U.A. and C.V.N.; visualization, F.T. and U.A.; supervision, A.B., U.A. and C.V.N.; project administration, C.V.N.; funding acquisition, C.V.N. All authors have read and agreed to the published version of the manuscript.

**Funding:** This research was partly funded by the Danish Council for Independent Research, grant number DFF—0136-00159A. The APC was funded by the Technical University of Denmark.

**Conflicts of Interest:** The authors declare no conflict of interest.

## **References**

