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Innovative thermoset materials and additive manufacturing processes to minimise
Publikationstyp
Conference Paper
Date Issued
2022-11
Sprache
English
Author(s)
Riecken, Björn T.
Kaysser, Simon T.
Hoppe, Jan
Konieczny, Tomasz
Hoppe, Michael
Lühring, Andreas
Bitomsky, Peter
Volume
1
Start Page
88
End Page
95
Citation
Sampe Europe 978-1-7138-6650-3 1: 88-95 (2024)
Contribution to Conference
Publisher
Sampe Europe
ISBN
978-1-7138-6650-3
Fused filament fabrication (FFF) provides an efficient way to produce parts and assemblies over a large spectrum of designs and materials. However, insufficient mechanical strength across interlayer bonding surfaces causes anisotropic properties of the printed parts, which is a major drawback. This problem cannot fully be alleviated by process parameter optimization. Two innovative research approaches are pursued to solve this problem.
In the project “HM3D”, the project consortium develops a novel thermoset filament that can be processed on ordinary FFF printers similar to thermoplastic filaments. First trials have shown that the
printed parts achieve significant covalent cross-linking across layer interfaces after a thermal curing cycle, thereby potentially eliminating mechanical anisotropy.
The project “EpoxySpacePrinter” takes this approach a step further by utilizing a continuous fibre reinforced thermoset filament, which is deposited in a system of two cooperating 6-axis robots,
thereby increasing in-plane strength and eliminating the need to deposit the filament within a fixed X-Y-plane. The possibility to extrude the filament also in Z-direction as well as in any other orientation- without support structure or any moulding tool - allows for a load-path compliant part design and structure, thereby enabling real 3D printing in filament based additive manufacturing.
In the project “HM3D”, the project consortium develops a novel thermoset filament that can be processed on ordinary FFF printers similar to thermoplastic filaments. First trials have shown that the
printed parts achieve significant covalent cross-linking across layer interfaces after a thermal curing cycle, thereby potentially eliminating mechanical anisotropy.
The project “EpoxySpacePrinter” takes this approach a step further by utilizing a continuous fibre reinforced thermoset filament, which is deposited in a system of two cooperating 6-axis robots,
thereby increasing in-plane strength and eliminating the need to deposit the filament within a fixed X-Y-plane. The possibility to extrude the filament also in Z-direction as well as in any other orientation- without support structure or any moulding tool - allows for a load-path compliant part design and structure, thereby enabling real 3D printing in filament based additive manufacturing.
DDC Class
600: Technology