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OVERPRINTING OF LARGE-SCALE THERMOPLASTIC COMPOSITES IN FGF-PROCESS USING LOCAL PREHEATING

Hümbert, Simon and Schmidt, Aaron and Atzler, Fynn (2023) OVERPRINTING OF LARGE-SCALE THERMOPLASTIC COMPOSITES IN FGF-PROCESS USING LOCAL PREHEATING. TWENTY-THIRD INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS (ICCM23), 2023-07-30 - 2023-08-04, Belfast, Nordirland.

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Abstract

The rise of large-scale systems for Fused Granular Fabrication (FGF) of thermoplastics opens up new possibilities for manufacturing thermoplastic composites. One promising approach is the overprinting of continuous fibre-reinforced laminates to increase complexity and functionality of highperformance structures. However, overprinting aerospace-grade materials like Polyether Ether Ketone (PEEK) requires high substrate and ambient temperatures. The large-scale systems lack the possibility to use heated build chambers and can therefore overprint only to a limited extent. This work investigates the possibility of equipping the printer system with local preheating for high-temperature substrates. Therefore, a heating concept using hot air heating is developed and evaluated regarding heating efficiency and the influence of heating on print quality. The study was performed on a modified desktop printer, with which temperature measurements and mechanical testing were carried out. Based on this study, a prototype of a local preheating for a large-scale FGF system was designed, suitable for multiaxis overprinting PEEK laminates. The heating capability of high-temperature substrates was evaluated. Results show preheating temperatures of over 200 °C and significant improvement of the material quality of printed PEEK. The developed prototype forms the basis for further process and technology development fur future composite manufacturing.

Item URL in elib:https://elib.dlr.de/199227/
Document Type:Conference or Workshop Item (Speech)
Title:OVERPRINTING OF LARGE-SCALE THERMOPLASTIC COMPOSITES IN FGF-PROCESS USING LOCAL PREHEATING
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hümbert, SimonUNSPECIFIEDhttps://orcid.org/0000-0003-1476-8427146662308
Schmidt, Aaronaaron.schmidt.dlr.deUNSPECIFIEDUNSPECIFIED
Atzler, FynnUNSPECIFIEDhttps://orcid.org/0009-0000-7234-3828146662309
Date:August 2023
Refereed publication:Yes
Open Access:Yes
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Status:Published
Keywords:Thermoplastic composites, overprinting, local preheating, Material extrusion
Event Title:TWENTY-THIRD INTERNATIONAL CONFERENCE ON COMPOSITE MATERIALS (ICCM23)
Event Location:Belfast, Nordirland
Event Type:international Conference
Event Start Date:30 July 2023
Event End Date:4 August 2023
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:Components and Systems
DLR - Research area:Aeronautics
DLR - Program:L CS - Components and Systems
DLR - Research theme (Project):L - Structural Materials and Design
Location: Stuttgart
Institutes and Institutions:Institute of Structures and Design > Design and Manufacture Technologies
Deposited By: Hümbert, Simon
Deposited On:15 Nov 2023 09:24
Last Modified:24 Apr 2024 20:59

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