Method for producing layered steel cord

Abstract

Provided is a method for producing a layered steel cord and belongs to the technical field of steel cord production. The method includes: prestressing some of steel filaments in each layer other than a core wire to obtain prestressed steel filaments; and arranging conventional steel filaments and the prestressed steel filaments in each layer alternately in a stranding machine and performing twisting to obtain the layered steel cord. In the prior art, during the twisting process of a steel cord, due to the residual stress of a steel filament itself and the fluctuation of the tension during the unwinding process, a layered steel cord has a problem of a large interlayer residual stress. The methods controls the stress distribution state of a twisted layered steel cord by prestressing steel filaments, and avoids unflatness of a cord fabric during calendering and warping during cutting in the production process of tires.

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