Kontinuierliche Herstellung von Schleifleisten aus Kohlenstoff mit einem geringen Anteil an duennen metallischen Leitern

EP 1564063 A UPAB: 20050915 NOVELTY - Following mixing and before firing with hydrogen as a protective atmosphere, a compressed profile (1) is roller-compacted continuously. It comprises green (unfired) carbon material (pyrolytic carbon plus additives and binder) with thin metallic conductors (2). DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for the composite so produced. USE - For continuous manufacture of a composite used for e.g. pantograph brushing strips, containing carbon and conductors. To make brushing strips for sliding pick-up of electricity, for operating vehicles with electric motors (claimed). ADVANTAGE - A particular advantage of the process, is continuous- and therefore economical manufacture, which has not been described previously. There are no limitations or high costs associated with conventional individual pressing of strips, or with extrusion of a completely-uniform structure. The electrical brushing strip produced, comprises a matrix of fired carbon with heat-treated binder, containing layered, thin metal conductors (2) in the required orientation, with desirable properties for this application. The density is 2.3 g/cm3 or less. Parallel to the layers, the mean specific resistance is measured at 3 mu Omega m. The composite contains less than 5% metal