Review and New Aspects in Combining Multipoint Moulding and Additive Manufacturing

Herzog, Thomas; Tille, Carsten

doi:10.3390/app11031201

Cited by 5 publications

(2 citation statements)

References 83 publications

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“…Titanium alloy has been extensively used in the medical fields of orthopedics, dentistry, and vascular surgery owing to its high strength, low density, high corrosion resistance, and excellent biocompatibility ( Domínguez-Trujillo et al, 2018 ). Traditional titanium alloy implants have been manufactured by iso-material mold casting or subtractive technologies such as machining, multipoint forming and NC machining ( Minto et al, 2020 ; Khorasani et al, 2016 ; Herzog and Tille 2021 ; Markopoulos et al, 2018 ). Hence, they are difficult to simulate the structure of cortical bone and cancellous bone in real bone tissue ( Bozkurt and Karayel, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

Advanced Surface Modification for 3D-Printed Titanium Alloy Implant Interface Functionalization

Sheng

Wang

et al. 2022

Front. Bioeng. Biotechnol.

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With the development of three-dimensional (3D) printed technology, 3D printed alloy implants, especially titanium alloy, play a critical role in biomedical fields such as orthopedics and dentistry. However, untreated titanium alloy implants always possess a bioinert surface that prevents the interface osseointegration, which is necessary to perform surface modification to enhance its biological functions. In this article, we discuss the principles and processes of chemical, physical, and biological surface modification technologies on 3D printed titanium alloy implants in detail. Furthermore, the challenges on antibacterial, osteogenesis, and mechanical properties of 3D-printed titanium alloy implants by surface modification are summarized. Future research studies, including the combination of multiple modification technologies or the coordination of the structure and composition of the composite coating are also present. This review provides leading-edge functionalization strategies of the 3D printed titanium alloy implants.

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Section: Introductionmentioning

confidence: 99%

Advanced Surface Modification for 3D-Printed Titanium Alloy Implant Interface Functionalization

Sheng

Wang

et al. 2022

Front. Bioeng. Biotechnol.

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“…These mould attachments reproduce those parts of the geometry that cannot be represented by VAMM. To ensure the exact positioning of the attachments, they should be manufactured directly on the silicone-made interpolation layer in fused filament fabrication (FFF), as outlined by Herzog and Tille (2021). Kuo et al (2017) investigate the use of a flexible silicone build plate.…”

Section: Introduction and State Of Technologymentioning

confidence: 99%

Investigation of suitable material and adhesion promoter combinations for fused filament fabrication on flexible silicone build plates

Herzog

Schnell

Tille

et al. 2022

RPJ

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Purpose The extension of the vacuum-assisted multipoint moulding (VAMM) technology to a broader field of geometries makes it necessary to extend it with attachments to the enhanced vacuum-assisted multipoint moulding with additive attachments (EMMA) technology. Therefore, it is necessary to build additive manufactured attachments on a curved silicone surface by fused filament fabrication (FFF). The main challenge of FFF on a silicone-made build plate is the adhesion of the part on the build plate. Hence, the purpose of this paper is to find suitable and reliably manufacturable material and adhesion promoter combinations for the use of the FFF on silicone build plates. Design/methodology/approach The combinations of seven different filaments and four adhesion promoters were investigated with an experimental study. Therefore, four different specimen geometries were built with the different combinations and tested in a tensile test, and some of the specimens were analysed with a confocal laser scanning microscope (CLSM). Findings This study proves that the FFF on unheated silicone building plates is possible for several material combinations. As a filament material, polylactide can reliably be manufactured with all of the investigated adhesion promoters on the silicone build plate. Thereby, the highest adhesion strengths were achieved with an adhesive foil as an adhesion promoter, whereas the glue stick is the most appropriate solution. The investigations with the CLSM showed that there are large differences in the manifestation of the first layer depending on the adhesion promoter used. Originality/value To the best of the authors’ knowledge, this study is the first to demonstrate the manufacturing of FFF-made attachments on silicone build plates for the EMMA process. This paper provides measurement data on the build plate adhesion of the attachments on silicone-made build plates.

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Curved surface form-finding with self-shaping perforated plates

Bahremandi-Tolou,

Wang,

Gattas

et al. 2024

ARIN

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Self-shaping systems offer a promising approach for making complex 3D geometries from the material-driven transformation of 2D sheets. However, current research development of such systems is focused on small-scale applications. This study proposes a self-shaping composite for generation of larger-scale curved surfaces suitable for spatial structures. The composite arises from the novel combination of a perforated plate passive layer and a heat-shrinkable active layer. Experimental investigations are undertaken to assess the influence of perforation parameters of the passive layer over the degree of curvature generated in the self-shaping composite system. A 3D scanner and parametric curvature evaluation tool were used to extract and analyse the fabricated surface curvatures. Three key deformation characteristics were identified: the generated surface is cylindrical with dominant curvature in the x-direction; curvature is approximately uniform across the surface width and length; and curvature is strongly influenced by perforation bridge and strap length parameters. Results of this study support the application of self-shaping curved surfaces for customizable discrete structure parts.

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Review and New Aspects in Combining Multipoint Moulding and Additive Manufacturing

Cited by 5 publications

References 83 publications

Advanced Surface Modification for 3D-Printed Titanium Alloy Implant Interface Functionalization

Advanced Surface Modification for 3D-Printed Titanium Alloy Implant Interface Functionalization

Investigation of suitable material and adhesion promoter combinations for fused filament fabrication on flexible silicone build plates

Curved surface form-finding with self-shaping perforated plates

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