At the K 2007 show in Germany, Dieffenbacher GmbH (parent of Dieffenbacher North America Inc., Windsor, Ont.) introduced a "direct" mixing-and molding process for SMC, analogous to its D-LFT technology for long-fiber thermoplastics.

At the K 2007 show in Germany, Dieffenbacher GmbH (parent of Dieffenbacher North America Inc., Windsor, Ont.) introduced a "direct" mixing-and molding process for SMC, analogous to its D-LFT technology for long-fiber thermoplastics. It produces SMC that is moldable immediately without maturation. The process involves mixing the liquid ingredients (including chemical thickener) and fillers, which are dosed by a single-screw extruder into a twin-screw mixer. Glass rovings feed into the twin-screw, where they are chopped. The mix is extruded through a die and cut into charges. After infrared heating, the charges are ready to mold. The system is more compact than a standard SMC line. It eliminates the need for inhibitor, top and bottom films, and side trim, reducing waste. A prototype hood was molded with near-Class-A finish. Diffenbacher developed this as part of the German government-sponsorted DuroVision project. Partners were Volkswagen, Reichhold, Byk Chemie, Johns Manville, Polytec Composites (formerly Menzolit-Fibron), M-Base Engineering + Software, Respecta KWM, and the Fraunhofer Institute for Chemical Technology. (519) 979-6937 . www.dieffenbacher.com

Dieffenbacher North America
9495 Twin Oaks Dr Windsor N8N 5B8, Ontario, Canada
Phone (519) 979-6937 Fax