Steel cord for tire

Abstract

The utility model discloses a steel cord for a tire. The steel cord comprises a core strand located at the innermost part; the outer layer is wound on the outer side of the core strand layer at a fixed lay length and comprises six outer strands; the outer winding wire is wound on the outer side of the outer layer at a fixed lay length; wherein each of the core strand and the outer strand comprises a core monofilament and six outer monofilaments twisted on the outer side of the core monofilament, the diameter of the core monofilament is consistent with that of the outer monofilaments and is larger than that of the outer winding wire, the twisting directions of the core strand and the outer strand are the same, the outer strand is wound on the outer side of the core strand in the opposite winding direction to form a whole rope, and finally the outer winding wire in the same direction as the core strand is wound. By adopting the high-strength steel wires and selecting the specific diameter, the twisting direction and the twisting length, the wear-resistant tire disclosed by the utility model can meet the use environment of a heavy-load tire, realize the wear-resistant effect and prolong the service life of the tire, and is more excellent in the calendering and using processes of the tire.

Description

Technical Field

[0001] The utility model relates to the technical field of steel cords, in particular to a steel cord for reinforcing off-road tires. Background Art

[0002] With the development of technology and production capacity in my country's tire industry, the market has put forward higher requirements for tire durability, safety and high-speed performance. New requirements have also been put forward for the development and application of steel cords as tire skeleton materials. During the use or driving of heavy-duty tires, the cords are subjected to very heavy loads, which cause wear and corrosion to the cords, and the tire tread will be worn and torn, affecting the service life. Therefore, a steel cord product with higher use strength is needed to meet market demand. Utility Model Content

[0003] The utility model aims to avoid the shortcomings of the prior art and provides a high-strength steel cord for off-road tires with a multi-layer structure.

[0004] The utility model solves the technical problem by adopting the following technical solution: a steel cord for off-road tires, comprising:

[0005] The innermost core strand;

[0006] An outer layer wound on the outside of the core strand layer at a fixed lay length, the outer layer comprising six outer strands;

[0007] An outer winding wire is wound on the outside of the outer layer with a fixed lay length;

[0008] Among them, the core strands and the outer layer constitute a whole rope, and the core strands and the outer strands each include a core monofilament and six outer monofilaments twisted on the outside of the core monofilament. The diameters of the core monofilament and the outer monofilament are consistent and larger than the diameter of the outer winding wire. The twist direction of the core strands, the outer strands and the outer winding wire is the same, and the twist direction of the whole rope is opposite to that of the core strands.

[0009] In several embodiments, the twist direction of the core strands and the outer strands is S twist, the twist direction of the whole rope is Z twist, and the twist direction of the outer winding wire is S twist.

[0010] In several embodiments, the diameters of the core monofilament and the outer monofilament are 0.28±0.01 mm, and the lay length of the core strands and the outer strands is 14 mm.

[0011] In several embodiments, the diameter of the outer winding wire is 0.15±0.01 mm, and the lay length of the outer winding wire is 5 mm.

[0012] In several embodiments, the steel cord has a diameter of 2.6-3.0 mm.

[0013] In several embodiments, the whole rope lay length is 25 mm.

[0014] In several embodiments, the breaking force of the steel cord is greater than or equal to 7780N.

[0015] The utility model has the following beneficial effects:

[0016] The utility model adopts high-strength steel wire, and through the selection of specific diameter, twist direction and twist pitch, it can meet the use environment of off-road heavy-load tires, achieve wear resistance, extend its service life, and perform better during tire calendering and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings described herein are for illustrative purposes only of selected embodiments and do not represent all possible implementations, and should not be considered to limit the scope of the present invention.

[0018] Figure 1 The cross-sectional structure of the steel cord for tire in this embodiment is schematically shown;

[0019] Figure 2 The enlarged structure of the core strand of the steel cord for tire in this embodiment is schematically shown. DETAILED DESCRIPTION

[0020] Below, embodiments of the present invention are described in detail with reference to the accompanying drawings. To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0021] Therefore, the following detailed description of the embodiments of the present invention provided in conjunction with the accompanying drawings is not intended to limit the scope of the present invention for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making creative work are within the scope of protection of the present invention.

[0022] Example 1

[0023] like Figure 1-Figure 2 As shown, the tire steel cord in this embodiment mainly includes an innermost core strand 10, an outer layer 20 wound on the outside of the core strand 10 with a fixed twist pitch, and an outer winding wire 30 wound on the outside of the outer layer 20 with a fixed twist pitch.

[0024] Among them, the outer layer 20 includes six outer strands 21, the core strand 10 and the outer strand 21 each include a core monofilament 11 and six outer monofilaments 12 twisted on the outside of the core monofilament 11, the diameters of the core monofilament 11 and the outer monofilament 12 are consistent and larger than the diameter of the outer winding wire 30, here, the core strand and the outer layer constitute a whole rope.

[0025] The core strands 10, the outer strands 21 and the outer winding wires 30 have the same twist direction, and the twist direction of the entire rope is opposite to that of the core strands.

[0026] Specifically, the twist direction of the core strand 10, the outer strand 21, and the outer winding wire 30 is S twist, and the twist direction of the entire rope is Z twist.

[0027] Furthermore, the diameters of the core monofilament 11 and the outer monofilament 12 are 0.28±0.01 mm, and the twist lengths of the core strands 10 and the outer strands 21 are 14 mm.

[0028] Furthermore, the diameter of the outer winding wire 30 is 0.15±0.01 mm, and the lay length of the outer winding wire 30 is 5 mm.

[0029] Furthermore, the whole rope lay length is 25 mm, that is, the outer strands 21 are evenly wound around the outer side of the core strands 10 with a lay length of 25 mm.

[0030] Furthermore, the diameter of the steel cord is 2.6-3.0 mm, and the breaking force of the steel cord product finally obtained is greater than or equal to 7780N.

[0031] The following results were obtained by comparing the previous similar products of our company with the examples of this application:

[0032]

[0033]

[0034] It can be learned from the above comparative data that in this embodiment, through the reasonable selection and design of steel wire diameter, lay pitch and lay direction, the breaking force can be significantly improved, and the cord penetration is also slightly improved, which has been substantially verified in the use of off-road tires and meets the use requirements of higher load off-road tires.

[0035] The present invention describes preferred embodiments, including the best way to carry out the present invention known to the inventor. Of course, it is obvious to those skilled in the art that these preferred embodiments will be changed. The inventors anticipate that the skilled artisans may use the changes as appropriate, and the inventors point out that the present invention may be implemented in other ways than those specifically described above. Therefore, the present invention includes all improvements included in the subject matter and scope of the present invention as defined by the claims. Moreover, unless otherwise stated or clearly contradictory in content, the present invention includes any of the above factors and all possible changes thereof.

Claims

1. A steel cord for a tire, characterized in that: include: The innermost core strand; An outer layer wound on the outside of the core strand layer at a fixed lay length, the outer layer comprising six outer strands; An outer winding wire is wound on the outside of the outer layer with a fixed lay length; Among them, the core strands and the outer layer constitute a whole rope, and the core strands and the outer strands each include a core monofilament and six outer monofilaments twisted on the outside of the core monofilament. The diameters of the core monofilament and the outer monofilament are consistent and larger than the diameter of the outer winding wire. The twist direction of the core strands, the outer strands and the outer winding wire is the same, and the twist direction of the whole rope is opposite to that of the core strands.

2. A tire steel cord according to claim 1, characterized in that: The twist direction of the core strands and the outer strands is S twist, the twist direction of the whole rope is Z twist, and the twist direction of the outer winding wire is S twist.

3. A steel cord for tire according to claim 2, characterized in that: The diameters of the core monofilament and the outer monofilament are 0.28±0.01 mm, and the twist distance of the core strands and the outer strands is 14 mm.

4. A steel cord for tire according to claim 2, characterized in that: The diameter of the outer winding wire is 0.15±0.01 mm, and the twist pitch of the outer winding wire is 5 mm.

5. A steel cord for tire according to claim 2, characterized in that: The diameter of the steel cord is 2.6-3.0 mm.

6. A steel cord for tire according to claim 2, characterized in that: The whole rope lay length is 25 mm.

7. A steel cord for tire according to claim 1, characterized in that: The breaking force of the steel cord is greater than or equal to 7780N.

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