RAPPERSWIL, SWITZERLAND (Jan. 10, 12 p.m. ET) — The Institut für Werkstofftechnik und Kunststoffverarbeitung (IWK) materials and plastics processing institute at the Hochschule für Technik Rapperswil (HSR) in Rapperswil, presented an illuminated metal foil back injection molded demonstration part at Fakuma 2011.
IWK has worked for several years on various forms of metal foil back injection. It has focused on using electro-luminescent (EL) film between the outer metal foil and base molding, through which electrical contact points are provided to supply electricity to the EL-foil.
But the part shown at Fakuma 2011 was characterized by use of a translucent metal foil. This provides a clean uninterrupted brushed metal surface that becomes selectively illuminated by touch, through the use of capacitative sensor technology in the EL-foil.
IWK has been working on this project with the MNT institute for nanotechnology in Buchs and the electroluminescence technology company Lumitec in Grais. A particular challenge faced was finding a translucent metal foil that can also be back injection molded.