CN206941288U - A kind of very high strength steel cord of (4+3) structure - Google Patents

Abstract

The utility model proposes a kind of very high strength steel cord of (4+3) structure, it includes the cored wire that four very high strength cored wire steel wires of internal layer are formed, the very high strength cover wire of three uneven arrangements compiles the type that is twisted around four cored wire steel wires of internal layer, and Formation cross-section is the steel cord of irregular shape；The cover wire compiles that the twist direction twisted with the fingers is twisted with the fingers for S and internal layer cored wire is without the lay pitch around cored wire steel wire, and internal layer cored wire assumes diamond in shape arrangement；The internal layer cored wire gauge of wire is equal with the diameter of cover wire.The very high strength steel cord of (4+3) structure of the present utility model, intensity is high, anti-puncture, endurance, can improve the corrosion resistance, bond properties and bonding confining force of tire, improves the comfortableness and service life of tire；Cord diameter and line density are smaller, reduce the thickness of cord, reduce the dosage of sizing material, reduce production cost.

Description

A kind of very high strength steel cord of (4+3) structure

Technical field

It the utility model is related to radial tyre steel cord technical field, more particularly to a kind of (4+ for radial tyre 3) the very high strength steel cord of structure.

Background technology

With the quick raising of China's automobile tire meridian rate, the quantity of tire production manufacturing enterprise is more and more, rule Mould also the more does the more big, and maturity also more and more higher, accordingly, market competition is also more and more fierce, how to reduce manufacturing cost, The topic inquired into jointly as each tire producer；While the intensity of steel cord is improved, the dosage of steel cord is also reduced, Reducing the usage amount of sizing material makes tire lighting to reduce fuel consumption etc. as the developing direction of steel cord.

Utility model content

In view of existing radial tyre development trend and the use demand to steel cord, the purpose of this utility model are to provide A kind of very high strength steel cord of (4+3) structure, makes steel cord to make tire lighting while possessing excellent performance.

To reach the purpose of this utility model, the very high strength steel cord of one kind (4+3) structure of the present utility model includes The cored wire that four very high strength cored wire steel wires of internal layer are formed, the very high strength cover wire of three uneven arrangements surround internal layer Four cored wire steel wires compile the type that is twisted, and Formation cross-section is the steel cord of irregular shape；The cover wire is compiled around cored wire steel wire The twist direction of sth. made by twisting is that S is twisted with the fingers and internal layer cored wire is without the lay pitch, and internal layer cored wire assumes diamond in shape arrangement；The internal layer cored wire gauge of wire and outer layer Gauge of wire is 0.32mm；It is 16.0mm that the internal layer cored wire compiles the lay pitch twisted with the fingers with cover wire.

The beneficial effects of the utility model are the very high strength steel cords of (4+3) structure, and intensity is high, anti-puncture, resistance to Fatigue, the corrosion resistance, bond properties and bonding confining force of tire can be improved, improve the comfortableness and service life of tire； Cord diameter and line density are smaller, reduce the thickness of cord, reduce the dosage of sizing material, reduce production cost.

Brief description of the drawings

By detailed description below in conjunction with the accompanying drawings, the foregoing and other objects, features and advantages of the utility model will Become apparent.Wherein：

Fig. 1 is a kind of structural representation of the very high strength steel cord of (4+3) structure of the present utility model；

Fig. 2 is the lay pitch schematic diagram of Fig. 1 steel cord.

Embodiment

The knot of the very high strength steel cord of (4+3) structure of reference picture 1 and the embodiment of the present utility model shown in Fig. 2 Structure schematic diagram, described steel cord include the cored wire that four very high strength cored wire steel wires 10 of internal layer are formed, three uneven rows The very high strength cover wire 20 of cloth compiles the type that is twisted around four cored wire steel wires of internal layer, and Formation cross-section is the steel curtain of irregular shape Line；The cover wire compiles that the twist direction twisted with the fingers is twisted with the fingers for S and internal layer cored wire is without the lay pitch around cored wire steel wire, and internal layer cored wire assumes diamond in shape row Row；The internal layer cored wire gauge of wire is equal with the diameter of cover wire.In a preferred embodiment, described internal layer The diameter of steel wire and cover wire is 0.32mm.

The utility model is used according to newest《Radial steel cord》National standard (GB/T_11181-2016) Defined very high strength steel wire, the intensity of steel wire than the regular tenacity of same diameter improve more than 30%；Steel wire diameter is small, cord Bend loading, pliability and fatigue performance also accordingly improve.

In addition, when steel cord of the present utility model carries out twisting, due to having used very high strength all-steel cord, therefore, Lay pitch during twisting, the twist direction of different layers steel cord etc. is required for being redesigned accordingly.The lay pitch is big, and productivity ratio is high, but Fatigue performance declines, and this is due to when the lay pitch is bigger, and the torsional deflection degree of cord monofilament in twisting is with regard to smaller, its bullet Property restoring force it is larger, if this elastic restoring force cannot eliminate, can decline the fatigue performance of cord, service life contracting It is short；The lay pitch is small, and the fatigue performance of steel cord improves, and elongation is high, but the spinning loss of intensity is big, and productivity ratio also reduces.Institute It is in steel cord R＆D process to carry out rational lay pitch design with the all-steel cord according to varying strength and different steel wire diameters Important performance characteristic.In a preferred embodiment of the present utility model, the internal layer cored wire compiles the sth. made by twisting twisted with the fingers with cover wire Away from for 16.0mm.

The very high strength steel cord of (4+3) structure of the present embodiment, internal layer cored wire and outer layer upper thread all use same diameter Steel wire, intensity of steel wire are high strong, and steel wire diameter 0.32mm, three steel wires are not exclusively wrapped up the cored wire of centre, are left more More gaps, it is easy to the infiltration of rubber, is advantageous to improve the bonding force between rubber and steel cord, so as to avoid because of moisture (water Point) enter inside steel cord and cause corrosion.It also has the superior functions such as preferable impact resistance, puncture-resistant, and raw Production cost can significantly reduce, and increase economic efficiency.

The performance comparison of the steel cord of (4+3 × 0.32UT) of the present embodiment and the steel cord of (4+3 × 0.35HT) is as follows：

Project	4+3×0.32UT	4+3×0.35HT
			Cord diameter (± 5%)/mm	1.080	1.190
Twist direction	S	S
			The lay pitch (± 5%)/mm	16.0	18.0
Minimum Fracture Force/N	1870	1825
			Line density (± 5%)/g/m	4.450	5.310

As can be seen from the table, (4+3 × 0.32UT) steel cord is compared with (4+3 × 0.35HT) steel cord：(1) structure is similar, Filament diameter is slightly reduced, and line density reduces；(2) fatigue performance is better than 4+3 × 0.35HT steel cords；(3) 4+3 × 0.32UT is most Small Fracture Force is higher, and cord diameter and line density are then smaller, it is ensured that the intensity of cord, reduces the thickness of calendering cord, subtracts The dosage of few sizing material, reduces production cost.

The very high strength steel cord of (4+3) structure of the present utility model, using with all-steel load-bearing radial tire belt, It is compiled sth. made by twisting by seven steel wires and formed, and intensity is high, anti-puncture, endurance, can improve the corrosion resistance of tire, bond properties and viscous Confining force is closed, improves the comfortableness and service life of tire；Cord diameter and line density are smaller, reduce the thickness of cord, subtract The dosage of few sizing material, reduces production cost.

The utility model is not limited to described embodiment, those skilled in the art do not depart from it is of the present utility model In the i.e. open scope of spirit, it can still make some amendments or change, therefore rights protection scope of the present utility model is with claims The scope of restriction is defined.

Claims (1)

1. a kind of very high strength steel cord of (4+3) structure, it is characterised in that described steel cord four including internal layer is high The cored wire that intensity cored wire steel wire is formed, the very high strength cover wire of three uneven arrangements are compiled around four cored wire steel wires of internal layer Type is twisted, Formation cross-section is the steel cord of irregular shape；The cover wire around cored wire steel wire compile twist with the fingers twist direction for S twist with the fingers and Without the lay pitch, internal layer cored wire assumes diamond in shape arrangement internal layer cored wire；The diameter of the internal layer cored wire gauge of wire and cover wire is 0.32mm；It is 16.0mm that the internal layer cored wire compiles the lay pitch twisted with the fingers with cover wire.