PROCESS FOR PRODUCING A STEEL CORD AND STEEL CORD PRODUCED BY THIS PROCESS

摘要

A process for producing a steel cord for pneumatic tyres with a bunch ofwires, the core of which consists of wire filaments (10) arranged in a bunchparallel and adjacent to one another. There are advantageously at least threewire filaments (10, 20), where at least two wire filaments (10) are spirallywound as filaments (10) forming a core (60) and run parallel and beside eachother and at least one wire filament is spirally wound around the two corefilaments (10) as the wrapping wire (20). According to the invention, thespiral deformation of the wire filaments (10) is obtained by false twisters(40). This spiral deformation of the wire filaments (10) especially preventsmigration of the filaments from the cord composite. It is an advantage ifresidual torsional stresses between the core filaments and in connection withthe restoring forces of the wrapping wire are relieved. The steel cord alsoadvantageously has a flattened, especially oval, shape.