Steel cord and single steel wire having excellent straightness quality for reinforcing tire and manufacturing method thereof

Abstract

The present invention relates to a steel cord and a single steel wire having excellent straightness quality for reinforcing a tire and a method for manufacturing the same. The steel cord and the single steel wire having excellent straightness quality for reinforcing a tire comprise: a wire which undergoes a heating step which is heated in a tensioned state after a wire drawing step, and which undergoes a cooling step; and a winding part having a diameter larger than the diameter of the wire and on which the wire is wound, wherein when one end of the wire, wound on the winding part for 6 monthsto one year, is fixed to one point and the wire is vertically lowered by 400 mm, it is preferable that a distance between a first axis which forms a line perpendicular to the one point and the otherend of the wire is 30 mm or less, and wherein a method for manufacturing a steel cord and a single steel wire having an excellent straightness quality for reinforcing a tire comprises: a wire preparing step; a heating step; a cooling step; and a winding step.

Description

technical field [0001] The present invention relates to a steel cord for tire reinforcement having excellent linear quality, a single steel wire, and a manufacturing method thereof, and more particularly, to a steel cord for tire reinforcement, and a single steel wire having excellent linear quality, and a manufacturing method thereof, by The steel cord and the single steel wire are heated and cooled to remove the stress remaining on the steel cord and the single steel wire, so as to promote the strain aging of the steel cord and the single steel wire to improve the final straight line quality. Background technique [0002] Typically, steel cords and single wires are used to reinforce elastic polymers such as tires or industrial belts. In particular, steel cords and single steel wires used in tire reinforcing materials require various quality characteristics in order to serve as reinforcing materials of materials in rubber. [0003] It takes several months to use steel cord...

AI Technical Summary

Problems solved by technology

[0005] Existing steel cords and single wires have a problem of not being able to provide steel cords and single wires having excellent linearity after aging

In other words, the problem with existing steel cords and single steel wires is that, even if they had excellent straightness characteristics at the time of original production, after a long period of time after winding a bobbin with a certain inner diameter, straightness occurs under stress within the elastic range by strain aging. Changes in characteristics, making it difficult to meet the characteristics of linearity quality

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