CN207079410U - A kind of high drawing steel cord - Google Patents

Abstract

The utility model discloses a kind of high drawing steel cord, steel cord body is formed by more strand twistings, strand includes be twisted together core wire and cover wire, the quantity of cover wire is more than core wire, and cover wire is centered around the outer layer of core wire, the diameter of core wire is more than the diameter of cover wire.Steel cord of the present utility model improves the intensity of finished product steel wire curtain, improves the strike-through performance of steel cord, tire drag, safe operation and service life are all significantly improved, and has higher production line rate.

Description

A kind of high drawing steel cord

Technical field

It the utility model is related to steel cord technical field, and in particular to a kind of high drawing steel cord.

Background technology

In the prior art, 3 × 7 × 0.20,3 × 7 × 0.22 high drawing steel cord is widely used in the band of full-steel radial ply Beam layer, and be the most important product of the outermost tyre layers zero degree string of a hat, but the product due to filament diameter it is partially thin, the rigidity of cord is inclined Low, tire retentivity of its appearance and size in running at high speed is poor, and rolling resistance is big；And monofilament arrangement is close after strand twisting, Strike-through ability in tire production, influence the fatigability of cord.Existing high elongation cord, it is that multiply equal diameter steel wire is twisted with the fingers System, increase gauge of wire can improve the rigidity of steel wire, but because monofilament quantity is more, the diameter of cord will certainly be made increased It is very big, make glue consumption and weight increase that tire is total.

The content of the invention

To solve the deficiencies in the prior art, the purpose of this utility model, which is to provide, a kind of improves the strong of finished product steel wire curtain Degree, improves the strike-through performance of steel cord, and to height that tire drag, safe operation and service life are all improved Extend steel cord.

In order to realize above-mentioned target, the utility model adopts the following technical scheme that：

A kind of high drawing steel cord, steel cord body are formed by more strand twistings, and strand includes the center that is twisted together Steel wire and cover wire, the quantity of cover wire is more than core wire, and cover wire is centered around the outer layer of core wire, center Gauge of wire is more than the diameter of cover wire.

Preferably, the quantity of foregoing strand is 2 ~ 4, is twisted together between strand.

More preferably, the quantity of aforesaid central steel wire is 1, and the quantity of cover wire is 6.

It is highly preferred that the intensity of aforesaid central steel wire is more than 3200Mpa, the intensity of cover wire is more than 2800Mpa.

It is further preferred that aforesaid central gauge of wire is 1.1 ~ 1.3 times of cover wire diameter.

Preferably, the twisting direction of foregoing strand and the twisting direction of steel cord body are that S is twisted with the fingers.

More preferably, the lay pitch of foregoing strand is 3.5 ~ 6mm, and the lay pitch of steel cord body is 6 ~ 10mm.

It is of the present utility model to be beneficial in that：

（1）The utility model improves the rigidity of steel cord by using the mode of different steel wire diameters, i.e., in steel cord In the case of integral diameter change less, increase and the diameter and intensity of the maximum strand core wire of steel cord stiffness effect are come Realize this purpose；

（2）Due to the increasing of strand core wire diameter, the mutual gap of cover wire increases, and makes oozing for steel cord Colloidality can be improved well；

（3）Because the utility model 3 × (1+6) structure steel cord substitutes existing 3 × 7 structure steel cord, rubber is improved The rigidity of the outermost tyre layers zero degree string of a hat and the fatigue behaviour of cord, to tire drag, safe operation and service life all It is significantly improved；

（4）The lay pitch of the utility model steel cord has increased than 3 × 7 structure steel cords, and production efficiency increases.

Brief description of the drawings

Fig. 1 is cross-sectional view of the present utility model；

The implication of reference in figure：1st, strand, 2, core wire, 3, cover wire.

Embodiment

Make specific introduce to the utility model below in conjunction with the drawings and specific embodiments.

In description of the present utility model, it is to be understood that term " " center ", " longitudinal direction ", " transverse direction ", " on ", " under ", The orientation or position relationship of the instruction such as "front", "rear", "left", "right", " vertical ", " level ", " top ", " bottom ", " interior ", " outer " are Based on orientation shown in the drawings or position relationship, it is for only for ease of description the utility model and simplifies description, rather than instruction Or imply that signified device or element must have specific orientation, with specific azimuth configuration and operation, therefore be not understood that For to limitation of the present utility model.In addition, term " first ", " second " be only used for describe purpose, and it is not intended that instruction or Imply relative importance.

A kind of high drawing steel cord, steel cord body are formed by the more twistings of strand 1, and the quantity of strand 1 is 2 ~ 4, stock It is twisted together between line 1.Strand 1 includes be twisted together core wire 2 and cover wire 3, and core wire 2 uses high-strength steel Silk.The quantity of cover wire 3 is more than core wire 2, and the quantity of core wire 2 is 1, and the quantity of cover wire 3 is 6, and Cover wire 3 is centered around the outer layer of core wire 2, and the diameter of core wire 2 is more than the diameter of cover wire 3, core wire 2 Diameter is 1.1 ~ 1.3 times of the diameter of cover wire 3.The intensity of core wire 2 is more than 3200Mpa, and the intensity of cover wire 3 is more than 2800Mpa.The twisting direction of strand 1 and the twisting direction of steel cord body are that S is twisted with the fingers.Meanwhile the lay pitch of strand 1 be 3.5 ~ 6mm, the lay pitch of steel cord body is 6 ~ 10mm.

In order to preferably illustrate the utility model, its making step is specifically described below.

Embodiment 1

A diameter of 0.25mm, intensity 3320Mpa from core wire, from upper thread gauge of wire be 0.20mm, Intensity is 2860Mpa, and 1 core wire and 6 upper thread steel wires are twisted together, and obtains strand 1, and the lay pitch of strand 1 is 10mm, twist direction are twisted with the fingers for S.After strand 1 is molded, takes three strands 1 to continue twisting, obtain finished product steel cord, the sth. made by twisting of finished product steel cord Away from for 8mm, twist direction is that S is twisted with the fingers.Because strand 1 is twisted again, the lay pitch of strand 1 is changed into the 4.5mm lay pitch in finished product steel cord, It is 5.5% to ultimately form S/S sth. made by twisting, the finished product steel cord of the 4.5/8mm lay pitch, and extension at break.

Embodiment 2

A diameter of 0.27mm, intensity 3330Mpa from core wire, from upper thread gauge of wire be 0.22mm, Intensity is 2880Mpa, and 1 core wire and 6 upper thread steel wires are twisted together, and obtains strand 1, and the lay pitch of strand 1 is 12mm, twist direction are twisted with the fingers for S.After strand 1 is molded, takes three strands 1 to continue twisting, obtain finished product steel cord, the sth. made by twisting of finished product steel cord Away from for 9mm, twist direction is that S is twisted with the fingers.Because strand 1 is twisted again, the lay pitch of strand 1 is changed into the 5mm lay pitch in finished product steel cord, most End form is twisted with the fingers into S/S, the finished product steel cord of the 5/9mm lay pitch, and extension at break is 6.3%.

The utility model improves the rigidity of steel cord by using the mode of different steel wire diameters, i.e., overall in steel cord In the case that diameter change is little, increases and the diameter and intensity of the maximum core wire 2 of strand 1 of steel cord stiffness effect are come in fact This existing purpose；Due to the increasing of the diameter of 1 core wire of strand 2, the mutual gap of cover wire 3 increases, and makes steel cord Strike-through performance improved well；Because the utility model 3 × (1+6) structure steel cord substitutes existing 3 × 7 structural steel curtain Line, the rigidity of the rubber tyre outermost layer zero degree string of a hat and the fatigue behaviour of cord are improved, to tire drag, safe operation All it is significantly improved with service life；The lay pitch of the utility model steel cord has increased than 3 × 7 structure steel cords, production Efficiency increases.

In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show The description of example " or " some examples " etc. means specific features, structure, material or the spy for combining the embodiment or example description Point is contained at least one embodiment or example of the present utility model.In this manual, to the schematic table of above-mentioned term State and be not necessarily referring to identical embodiment or example.Moreover, specific features, structure, material or the feature of description can be Combined in an appropriate manner in any one or more embodiments or example.

General principle, principal character and advantage of the present utility model has been shown and described above.The technical staff of the industry It should be appreciated that above-described embodiment does not limit the utility model in any form, it is all by the way of equivalent substitution or equivalent transformation The technical scheme obtained, all falls within the scope of protection of the utility model.

Claims (7)

1. a kind of high drawing steel cord, it is characterised in that steel cord body is formed by more strand twistings, and the strand includes twisting with the fingers Core wire and cover wire, the quantity of the cover wire are more than core wire to system together, and during cover wire is centered around The outer layer of heart steel wire, the diameter of the core wire are 1.1~1.3 times of cover wire diameter, the intensity of the core wire More than 3200Mpa, the intensity of the cover wire is more than 2800Mpa.

A kind of 2. high drawing steel cord according to claim 1, it is characterised in that the quantity of the strand is 2~4, It is twisted together between strand.

A kind of 3. high drawing steel cord according to claim 1, it is characterised in that the quantity of the core wire is 1, The quantity of the cover wire is 6.

4. a kind of high drawing steel cord according to claim 1, it is characterised in that the twisting direction of the strand and steel curtain The twisting direction of line body is that S is twisted with the fingers.

A kind of 5. high drawing steel cord according to claim 1, it is characterised in that the lay pitch of the strand be 3.5~ 6mm, the lay pitch of the steel cord body is 6~10mm.

6. a kind of high drawing steel cord according to claim 1, it is characterised in that the intensity of the core wire is 3320Mpa or 3330Mpa, the intensity of the cover wire is 2860Mpa or 2880Mpa.

A kind of 7. high drawing steel cord according to claim 1, it is characterised in that the core wire it is a diameter of 0.25mm or 0.27mm, a diameter of 0.20mm or 0.22mm of the cover wire.