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Innovative infusion method for out-of-autoclave and autoclave processes

Hindersmann, Arne and Ucan, Hakan and Bäns, Constantin and Müller, Michael and Kruse, Felix (2014) Innovative infusion method for out-of-autoclave and autoclave processes. Airtech 2014, 2014-10-28 - 2014-10-30, Frankfurt, Deutschland. (Unpublished)

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Today, the reduction of manufacturing costs is a big challenge to the aircraft industry and the usage of prepreg materials is state of the art. It is known that the impregnation of dry fibre materials with a liquid resin can reduce the manufacturing costs. But for future applications of infusion processes for aircraft parts, it is essential to provide a good laminate quality and to reduce the scrap rate. Therefrom, a new infusion method for out-of-autoclave and autoclave- based processes will be investigated. A conventional vacuum infusion process uses a single-sided mould and a flexible vacuum bag to form a cavity for the composite part. The resin feed channels and other supplies distribute the resin over the composite part. The new method uses resin distribution channels beyond the vacuum bag and a pressure difference between these channels and the mould cavity. Therefore, the channels have no immediate contact to the resin and they are reusable for other parts. The channels will be pressurised with a pressure lower than the resin pressure. This enables the resin to flow primarily in this area. To stop the resin flow, pressure equalisation between resin and channels will be applied. This has the advantage that the channels will not leave any marks on the part surface. By this method, resin flow fronts can be manipulated and the risk of dry spots is reduced. This infusion process is combined with an automated mixing and dosing unit for a continuous processing of a two- component resin system. The mixing ratio and the pressure difference between the ambient and the resin pressure are automatically controlled. For autoclave applications, the resin pressure is up to 10 bars. To improve the viscosity, both components of the epoxy can be preheated to a temperature of 80°C and therefore the handling of resin systems like Hexcel RTM6-2 is permitted. The new approach will help to enhance the infusion of aircraft parts and it will also reduce the manufacturing costs of composite parts.

Item URL in elib:https://elib.dlr.de/101491/
Document Type:Conference or Workshop Item (Speech)
Title:Innovative infusion method for out-of-autoclave and autoclave processes
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Hindersmann, ArneUNSPECIFIEDhttps://orcid.org/0000-0001-5060-8776UNSPECIFIED
Ucan, HakanUNSPECIFIEDhttps://orcid.org/0000-0002-5568-4564UNSPECIFIED
Refereed publication:No
Open Access:No
Gold Open Access:No
In ISI Web of Science:No
Keywords:Infusion, RTM6, Resin Distribution Channels, Flow Front, Thermography
Event Title:Airtech 2014
Event Location:Frankfurt, Deutschland
Event Type:national Conference
Event Start Date:28 October 2014
Event End Date:30 October 2014
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:other
DLR - Research area:Aeronautics
DLR - Program:L - no assignment
DLR - Research theme (Project):L - no assignment
Location: Stade
Institutes and Institutions:Institute of Composite Structures and Adaptive Systems > Verbundprozesstechnologie
Deposited By: Ucan, Dipl.-ing. Hakan
Deposited On:26 Jan 2016 13:41
Last Modified:24 Apr 2024 20:07

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