In collaboration with industrial partners, the Fraunhofer Institute for Manufacturing Technology and Advanced Materials IFAM in Bremen has developed a new quality assurance method for monitoring the surfaces of fiber reinforced plastics prior to adhesive bonding. Following successful technology transfer, this innovative method will be demonstrated at JEC Europe 2014 in Paris from 11-13 March. The new Bondinspect® method will be presented at the fair by Automation W+R GmbH (Stand N79, Pavillon 7/39).
Lightweight aircraft and cars are designed using components made of carbon fiber reinforced plastic (CFRP).
The manufacture of these CFRP components is carried out in metallic molds. Demolding is generally facilitated by treating the molds beforehand with a release agent.
However, some release agent adheres to the molded product and these residues must be removed manually prior to subsequent coating or bonding.
Contamination of CFRP surfaces by release agent residues impairs adhesion and hence the quality of bonded joints. So how can such residues be detected on components?
Automated monitoring of CFRP surfaces
Fraunhofer IFAM scientists have developed an automated aerosol wetting test suitable for industrial production. This wetting test efficiently inspects the surfaces of large components during the production process.
An ultrasonic atomizer first of all generates a defined water aerosol. This then creates a characteristic pattern of droplets on the component surface that is being inspected. A camera system records these droplets and shows them on a screen.
The droplet size distribution allows statements to be made about the wetting properties of the surface. By defining target values, for example, the cleaning and activation effect of a surface pretreatment step can be automatically monitored.
The advantage of the aerosol test is that large surfaces, for example fiber composite components for aircraft and wind turbines, can also be tested. The water aerosol dries within a very short time and leaves no residues, meaning the components can be further processed shortly after inspection.
Martina Ohle | Fraunhofer-Institut
Researchers demonstrate size quantization of Dirac fermions in graphene
20.05.2016 | Lehigh University
Graphene: A quantum of current
20.05.2016 | Vienna University of Technology
Characterization of high-quality material reveals important details relevant to next generation nanoelectronic devices
Quantum mechanics is the field of physics governing the behavior of things on atomic scales, where things work very differently from our everyday world.
When current comes in discrete packages: Viennese scientists unravel the quantum properties of the carbon material graphene
In 2010 the Nobel Prize in physics was awarded for the discovery of the exceptional material graphene, which consists of a single layer of carbon atoms...
The trend-forward world of display technology relies on innovative materials and novel approaches to steadily advance the visual experience, for example through higher pixel densities, better contrast, larger formats or user-friendler design. Fraunhofer ISC’s newly developed materials for optics and electronics now broaden the application potential of next generation displays. Learn about lower cost-effective wet-chemical printing procedures and the new materials at the Fraunhofer ISC booth # 1021 in North Hall D during the SID International Symposium on Information Display held from 22 to 27 May 2016 at San Francisco’s Moscone Center.
Staphylococcus aureus usually is a formidable bacterial pathogen. Sometimes, however, weakened forms are found in the blood of patients. Researchers of the University of Würzburg have now identified one mutation responsible for that phenomenon.
Staphylococcus aureus is a bacterium that is frequently found on the human skin and in the nose where it usually behaves inconspicuously. However, once inside...
Using ultrashort laser pulses an international team at the Max Planck Institute of Quantum Optics and the Ludwig-Maximilians-Universität Munich has managed to manipulate the positions of atoms in hydrocarbon molecules.
Light can conduct the play of atoms and molecules in the microcosm. Humans manage to interfere with this play. Researchers from the Laboratory of Attosecond...
20.05.2016 | Event News
19.05.2016 | Event News
17.05.2016 | Event News
23.05.2016 | Information Technology
23.05.2016 | Architecture and Construction
23.05.2016 | Earth Sciences