CN218893891U

CN218893891U - Small lay length steel cord structure based on four strands of strands

Info

Publication number: CN218893891U
Application number: CN202223164427.4U
Authority: CN
Inventors: 姚凤刚; 钱国平; 陈亮; 严华
Original assignee: Zhangjiagang City Junma Steel Cord Co ltd
Current assignee: Zhangjiagang City Junma Steel Cord Co ltd
Priority date: 2022-11-28
Filing date: 2022-11-28
Publication date: 2023-04-21
Anticipated expiration: 2032-11-28

Abstract

The utility model relates to the technical field of steel cords, in particular to a small lay length steel cord structure based on four strands, which comprises steel cord bundles formed by mutually winding four strands after passing through a wire distribution board, wherein each strand comprises four monofilaments twisted with each other; the four monofilaments are twisted in a tangent mode in pairs, the cross section of the four monofilaments is regular quadrangle, a first cavity with a closed peripheral side is formed among the four monofilaments, four strands of wires are distributed symmetrically around the axis of the steel cord bundle in a central mode, adjacent monofilaments are abutted to each other, and a second cavity with a closed peripheral side is formed in the middle of the second cavity; the steel cord adopts compact 4*4 structure, and the cross section of single strand or cord all can form firm quadrangle, and this application steel cord's lay length is less, and the lay direction of steel strand is the same with the steel cord lay direction to have higher elongation and high impact toughness, make the tire travelling in-process travelling comfort better, be applicable to passenger car tire.

Description

Small lay length steel cord structure based on four strands of strands

Technical Field

The utility model relates to the technical field of steel cords, in particular to a small lay length steel cord structure based on four strands of strands.

Background

Because the steel cord has high strength, the tire made of the steel cord serving as a main framework material of the tire is quick in heat dissipation, good in wear resistance, safe and the like, and replaces nylon, nylon and other cord fabrics.

Structural cords such as 1*2, 1*3 and 1*5 commonly used at present have larger lay lengths, generally elongation less than 2.0, so that the stress between the steel cords is larger, relative abrasion can occur, and the bearing capacity of the cords is easy to lose efficacy due to insufficient strength of the steel cords or rust of the steel wires, so that the manufactured tire is poor in comfort.

Disclosure of Invention

The utility model provides a technical scheme, in particular to a small lay length steel cord structure based on four strands, which comprises steel cord bundles formed by mutually winding four strands after passing through a wire distribution disc, wherein each strand comprises four monofilaments mutually twisted;

four monofilaments are twisted in a tangent mode in pairs, the cross section of the monofilaments is regular quadrangle, a first cavity with a closed periphery is formed among the four monofilaments, four strands of wires are distributed in a central symmetry mode around the axis of the steel cord bundle, adjacent monofilaments are mutually attached, and a second cavity is formed in the middle of the second cavity.

Preferably, the diameter of the monofilaments is between 0.15mm and 0.35mm.

Preferably, the lay length of the steel cord bundle is in the range of 4.5mm to 5.5mm.

Preferably, the lay length of the strands ranges from 2.5mm to 3.5mm.

Preferably, the twist direction of the steel cord bundle is the same as the twist direction of the strands.

Preferably, the twisting direction of the steel cord bundle is SS direction.

Compared with the prior art, the utility model has the advantages that:

the steel cord provided by the utility model adopts a compact 4*4 structure, the cross section of a single strand or the cord can form a stable quadrangle, the twisting distance of the steel cord is smaller, and the twisting direction of the steel strand is the same as that of the steel cord, so that the steel cord has higher elongation and high impact toughness, and the tire has better comfort in the running process, and is suitable for passenger car tires.

Drawings

The drawings are not intended to be drawn to scale. In the drawings, each identical or nearly identical component that is illustrated in various figures may be represented by a like numeral. For purposes of clarity, not every component may be labeled in every drawing. Embodiments of various aspects of the utility model will now be described, by way of example, with reference to the accompanying drawings, in which:

fig. 1 is a schematic cross-sectional view of a small lay length steel cord structure based on four strands as shown in an embodiment of the present utility model.

Detailed Description

For a better understanding of the technical content of the present utility model, specific examples are set forth below, along with the accompanying drawings.

The utility model provides a technical scheme, in particular to a small lay length steel cord structure based on four strands, which is mainly applied to a tire of a passenger car to serve as a framework material and mainly comprises a steel cord bundle 100 formed by mutually winding four strands 10 after passing through a wire distribution board, wherein each strand 10 comprises four monofilaments 1 mutually twisted.

As shown in fig. 1, four monofilaments 1 are twisted in a tangent manner two by two, the cross section is in a regular quadrangle, a first chamber 101 with a closed periphery is formed between the four monofilaments 1, and a stable quadrangle can be formed in the cross section.

Further, the diameter of the monofilament 1 is 0.15mm to 0.35mm, and the lay length of the yarn 10 is 2.5mm to 3.5mm.

Specifically, the monofilament 1 is made of high-quality high-carbon steel wire and has a brass plating layer, and the brass plating layer has good adhesion force and good adhesion retention rate with rubber, so that the twisting length of the strand 10 is smaller, and the strand 10 has higher elongation and high impact toughness.

Further, the four strands 10 are distributed in a central symmetry around the axis of the steel cord bundle 100, and are wound around each other after passing through the distribution board, and adjacent monofilaments 1 are abutted against each other, and a closed second chamber 102 is formed in the middle.

Further, the lay length of the steel cord bundle 100 ranges from 4.5mm to 5.5mm.

Specifically, the twisting direction of the steel cord bundle 100 is the same as the twisting direction of the strands 10, and the twisting direction of the steel cord bundle 100 is SS, that is, the twisting direction of the steel cord bundle 100 and the twisting direction of the strands 10 are both left directions.

Therefore, the steel wire cord of the specification has smaller twisting distance, the twisting direction of the steel wire strand is the same as that of the steel wire cord, and the steel wire cord has higher elongation and high impact toughness, so that the tire has better comfort in the running process, and is suitable for passenger car tires.

Specific embodiments of the 4*4 steel cord are exemplified:

	example 1	Example 2
			Diameter of monofilament (mm)	0.22	0.20
Diameter (mm)	1.32	1.28
			Linear density (g/m)	5.40	5.19
Steel cord lay length (mm)	(strand) 3.5/(Steel cord bundle) 5	(strands) 3.0/(Steel cord bundle) 4.8
			Direction of twist	SS	SS
Breaking force (N)	1147	1021

While the utility model has been described with reference to preferred embodiments, it is not intended to be limiting. Those skilled in the art will appreciate that various modifications and adaptations can be made without departing from the spirit and scope of the present utility model. Accordingly, the scope of the utility model is defined by the appended claims.

Claims

1. The small lay length steel cord structure based on four strands is characterized by comprising steel cord bundles (100) formed by mutually winding four strands (10) after passing through a distribution board, wherein each strand (10) comprises four monofilaments (1) mutually twisted;

four monofilaments (1) are twisted in a tangent mode in pairs, the cross section of the monofilaments is regular quadrangle, a first cavity (101) with a closed peripheral side is formed among the four monofilaments (1), four strands of strands (10) are distributed in a central symmetry mode around the axis of the steel cord bundle (100), adjacent monofilaments (1) are abutted to each other, and a second cavity (102) with a closed peripheral side is formed in the middle of the second cavity.

2. A small lay length steel cord structure based on four strands according to claim 1, characterized in that the diameter of the monofilament (1) is between 0.15mm and 0.35mm.

3. The four-ply yarn-based small lay length steel cord structure according to claim 1, characterized in that the lay length of the steel cord bundle (100) ranges from 4.5mm to 5.5mm.

4. A small lay length steel cord structure based on four strands according to claim 1, characterized in that the lay length of the strands (10) ranges from 2.5mm to 3.5mm.

5. The four-ply yarn-based small lay length steel cord structure according to claim 1, characterized in that the lay direction of the steel cord bundle (100) is the same as the lay direction of the yarn (10).

6. The four-ply yarn-based small lay length steel cord structure according to claim 1, characterized in that the lay direction of the steel cord bundle (100) is SS-direction.