CN220284468U

CN220284468U - 1+6 structural steel cord for tire belt ply

Info

Publication number: CN220284468U
Application number: CN202321584185.6U
Authority: CN
Inventors: 宋瑞贵; 黄柏华; 赵学武; 章家泉; 孟凡钧
Original assignee: Jiaxing Eastern Steel Cord Co Ltd; Tengzhou Eastern Steel Cord Co Ltd
Current assignee: Jiaxing Eastern Steel Cord Co Ltd; Tengzhou Eastern Steel Cord Co Ltd
Priority date: 2023-06-20
Filing date: 2023-06-20
Publication date: 2024-01-02
Anticipated expiration: 2033-06-20

Abstract

The utility model discloses a steel cord for a tire belt layer with a 1+6 structure, which is characterized by comprising an inner core layer and an outer layer, wherein the inner core layer comprises an inner core wire, the outer layer is formed by twisting six outer layer wires, the outer layer wires are uniformly wound around the inner core wire, the six outer layer wires are twisted around the inner core wire to form the steel cord with a circular section, and the breaking force of the steel cord is more than or equal to 1890N. The steel wire of the steel cord is of ultra-high strength, when the equal strength replaces the existing belt structure, the diameter of the steel wire is reduced, the diameter of the cord can be reduced, the using amount and the rubber consumption of the cord can be reduced, the rolling resistance of the tire can be reduced, the same reinforcing effect can be maintained, the weight of the steel cord in the tire can be reduced, the production cost of the tire can be reduced, and the lightweight requirement of the tire can be met.

Description

1+6 structural steel cord for tire belt ply

Technical Field

The utility model relates to the technical field of steel cords, in particular to a steel cord for a tire belt layer with a 1+6 structure.

Background

With the continuous development of the transportation industry, automobile tires gradually develop towards the directions of light weight, low rolling resistance and high fatigue resistance, steel cords of automobile tire framework materials become main influencing factors, the performances of the steel cords are ensured, the strength of the steel cords is improved, and the weight of the steel cords of the automobile tires is reduced to the development direction of the steel cord industry. The steel cord is going through the transition stage from ordinary strength, high strength to ultra-high strength and ultra-high strength. The current steel cord structures such as 1+6 and 3+6 types have the defects that the use amount and the glue consumption amount of the cord are large, so that the manufacturing cost of the tire is high, and the defects exist.

Disclosure of Invention

The utility model provides a steel cord for a tire belt layer with a 1+6 structure, which aims to avoid the defects existing in the prior art.

The utility model solves the technical problems by adopting the following technical scheme: the steel cord for the tire belt ply with the 1+6 structure is characterized by comprising an inner core layer and an outer layer, wherein the inner core layer comprises an inner core wire, the outer layer is formed by twisting six outer layer wires, the outer layer wires are uniformly wound around the inner core wire, the six outer layer wires are twisted around the inner core wire to form the steel cord with a circular cross section, and the breaking force of the steel cord is more than or equal to 1890N.

In several embodiments, the inner core wire has a diameter of 0.31-0.33mm.

In several embodiments, the inner core wire is deformed by a gear deformer, and the wave height of the deformed inner core wire is between 0.35 and 0.42 mm.

In several embodiments, the outer layer wire has a diameter of 0.30-0.32mm.

In several embodiments, the lay direction of the outer layer wire is the S direction and the lay length of the outer layer wire is 16mm.

In several embodiments, the outer and inner wires are ultra-high strength steel wires.

The utility model has the following beneficial effects:

the steel wire of the steel cord is of ultra-high strength, when the equal strength replaces the existing belt structure, the diameter of the steel wire is reduced, the diameter of the cord can be reduced, the using amount and the rubber consumption of the cord can be reduced, the rolling resistance of the tire can be reduced, the same reinforcing effect can be maintained, the weight of the steel cord in the tire can be reduced, the production cost of the tire can be reduced, and the lightweight requirement of the tire can be met.

Drawings

The drawings described herein are for illustration purposes only of selected embodiments and are not intended to represent all possible implementations and should not be construed as limiting the scope of the present utility model.

Fig. 1 schematically shows a cross-sectional structure of a steel cord for a tire belt of a 1+6 structure in this embodiment.

Detailed Description

Embodiments of the present utility model will be described in detail below with reference to the accompanying drawings, and for the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model but not all embodiments of the present utility model.

Accordingly, the following detailed description of the embodiments of the utility model, provided in connection with the accompanying drawings, is not intended to limit the scope of the utility model, as claimed, but is merely representative of selected embodiments of the utility model, as all other embodiments that may be obtained by one of ordinary skill in the art without making inventive efforts based on the embodiments herein, are within the scope of this utility model.

Example 1

As shown in fig. 1, the steel cord for a tire belt layer with a 1+6 structure in this embodiment comprises an inner core layer and an outer layer, wherein the inner core layer comprises an inner core wire 10, the outer layer is formed by twisting six outer layer wires 20, the outer layer wires 20 are uniformly wound around the inner core wire 10, six outer layer wires 20 are twisted around the inner core wire 10 to form a steel cord with a circular cross section, and the breaking force of the steel cord is not less than 1890N.

The diameter of the inner core wire 10 is 0.31-0.33mm, preferably 0.32mm, an ultra-high strength steel wire material is adopted, the inner core wire 10 is deformed and molded through a gear deformer, the wave height of the deformed inner core wire 10 is 0.35-0.42mm, and the permeation effect of rubber can be improved after the inner core wire 10 is deformed.

And the diameter of the outer layer wire 20 is 0.30-0.32mm, preferably 0.31mm, the twisting direction of the outer layer wire 20 is S direction, the twisting distance of the outer layer wire 20 is 16mm, and the ultra-high strength steel wire material is adopted.

The inner core wire 10 and the outer layer wire 20 of the present utility model are formed by the steps of: first,: selecting 92C wire rods as raw materials, giving chemical components and inclusion standards, and refining structural grains by reducing the heat treatment-electroplating line speed; then: the twisting layering problem is improved by adopting double-mode drawing through wet drawing and reducing the total compression ratio and the partial compression ratio, so that the breaking problem of the ultra-high strength steel wire is reduced, wherein the monofilaments of the inner core wire 10 are deformed by adopting a wet drawing gear deformer, and finally are formed by twisting together with the outer layer wire 20 on a double-twisting machine, and the twisting of the monofilaments is controlled to be more than 60 r/min.

The design principle of the steel cord with the 0.32+6 x 0.31UT structure is equal strength substitution, and the performance parameters of the steel cord with the existing belt structure are compared as follows:

as can be seen from the table, the steel wire diameter, the steel cord diameter and the linear density of 0.32+6×0.31ut are remarkably reduced compared with the conventional belt steel cord under the condition of keeping the breaking force unchanged, so that the cord quality index and the gum index are remarkably reduced, the weight of the tire is reduced, the manufacturing cost of the tire is reduced, and the fatigue resistance is improved.

The present utility model describes preferred embodiments, including the best mode known to the inventors for carrying out the utility model. Variations of these preferred embodiments will, of course, be apparent to those skilled in the art. The inventors expect skilled artisans to employ such variations as appropriate, and the inventors intend for the utility model to be practiced otherwise than as specifically described herein. Accordingly, this utility model includes all modifications encompassed within the spirit and scope of the utility model as defined by the claims. Moreover, unless indicated otherwise or clearly contradicted by context, the present utility model includes any of the above-described factors and all possible variations thereof.

Claims

1. The steel cord for the tire belt ply with the 1+6 structure is characterized by comprising an inner core layer and an outer layer, wherein the inner core layer comprises an inner core wire, the outer layer is formed by twisting six outer layer wires, the outer layer wires are uniformly wound around the inner core wire, the six outer layer wires are twisted around the inner core wire to form the steel cord with a circular cross section, and the breaking force of the steel cord is more than or equal to 1890N.

2. A 1+6 structured steel cord for tire belt as in claim 1, wherein said inner core wire has a diameter of 0.31-0.33mm.

3. A 1+6 structured steel cord for tire belt according to claim 2, wherein said inner core is deformed by a gear deformer, and the wave height after deformation of said inner core is between 0.35 and 0.42 mm.

4. A 1+6 structured steel cord for a tire belt as in claim 3, wherein said outer layer wire has a diameter of 0.30-0.32mm.

5. A 1+6 structured steel cord for tire belt as in claim 4, wherein the lay direction of said outer layer wire is S-direction and the lay length of said outer layer wire is 16mm.

6. A 1+6 structural steel cord for tire belt as in claim 5, wherein said outer and inner wires are ultra-high strength steel wires.