CN214219193U - Steel wire cord for improving glue layer infiltration - Google Patents

Abstract

The utility model discloses an improve steel cord of glue film infiltration, including core strand steel wire, intermediate level strand steel wire and outer strand steel wire, core strand steel wire includes that at least three strands of core strand first layer steel wires, nine strands of intermediate level strand second layer steel wires at least and fifteen strand outer strand third layer steel wires are compiled and are twisted with fingers and form. The utility model discloses the clearance between the fifteen outer strand steel wires that set up and between the nine intermediate level strand steel wires is great, is favorable to rubber fully to permeate core strand steel wire, avoids leading to the point contact friction between each layer steel wire because of the not fully permeated passageway of rubber, and then has avoided the problem that steel cord bearing capacity became invalid because of wearing and tearing.

Description

Steel wire cord for improving glue layer infiltration

Technical Field

The utility model relates to an improve steel cord of glue film infiltration belongs to steel cord's technical field.

Background

The steel cord is an important component in a framework material of a radial tire, the steel cord with a 3+9+15 x d structure commonly used for the radial tire is formed by weaving and twisting core strand steel wires, middle layer strand steel wires and outer layer strand steel wires, the diameters of the steel wires in the core strand steel wires, the middle layer strand steel wires and the outer layer strands are the same, the twist direction of the (3 +9+ 15) x d1 structure is ZZZ, the twist pitch is 5.0/10.0/16.0mm or 6.3/12.5/18.0mm, the arrangement of the outer layer strand steel wires is compact, gaps among the steel wires are small, and rubber cannot effectively permeate into the middle layer strand steel wires so that the air content in the cord is high.

In the use process of the radial tire, the problem of cord thread bearing capacity failure caused by insufficient strength of the steel cord thread or corrosion and abrasion of the steel wire is easy to occur, the structure of the steel cord thread, the strength, the bending rigidity and the adhesive property with rubber have direct influence on the tire, and the defects caused by unreasonable structural design cannot be completely compensated only by controlling the production process of the steel cord thread.

Disclosure of Invention

An object of the utility model is to overcome not enough among the prior art, provide a improve steel cord of glue film infiltration, solve steel cord intensity not enough, the clearance is little between the outer thigh, and rubber can not effectively permeate core strand steel wire and cause the higher defect of the inside air content of cord.

In order to achieve the above purpose, the utility model adopts the technical proposal that:

the steel wire cord for improving the infiltration of the glue layer is characterized by comprising core strand steel wires, middle strand steel wires and outer strand steel wires, wherein the core strand steel wires are formed by weaving and twisting at least three strands of core strand first layer steel wires, at least nine strands of middle strand second layer steel wires and at least fifteen strands of outer layer steel wires which are arranged layer by layer from inside to outside;

the middle layer strand steel wire is arranged on the periphery of the core strand steel wire along the circumferential direction, and the outer layer strand steel wire is arranged on the periphery of the middle layer strand steel wire along the circumferential direction;

the first layer of steel wire diameter of first layer steel wire is greater than the second layer of steel wire diameter of intermediate level thigh second layer steel wire, second layer of steel wire diameter is greater than the third layer of steel wire diameter of outer layer thigh third layer steel wire.

Furthermore, the diameter range of the first layer of steel wires is 0.19-0.26 mm, the diameter range of the second layer of steel wires is 0.18-0.25 mm, and the diameter range of the third layer of steel wires is 0.17-0.24 mm.

Further, the diameter of the first layer of steel wires is larger than that of the second layer of steel wires by 0.01mm, and the diameter of the second layer of steel wires is larger than that of the third layer of steel wires by 0.01 mm.

Further, the twisting direction of the steel wires of the core strand is the same as that of the steel wires of the middle layer strand and that of the steel wires of the outer layer strand.

Furthermore, the lay length of the third layer of steel wires of the outer layer strands is 1.333-1.50 times of that of the second layer of steel wires of the middle layer strands, and the lay lengths of the first layer of steel wires of the core strands and the third layer of steel wires of the outer layer strands are equal.

Further, the lay length of the first layer of steel wires of the core strand is larger than that of the second layer of steel wires of the middle layer strand.

Further, the third layer of steel wire gaps L1 between the steel wires of the outer layer strands is larger than 0.025mm, and the second layer of steel wire gaps L2 between the steel wires of the middle layer strands is larger than 0.022 mm.

Further, the strength grades of the first layer steel wires of the core strands, the second layer steel wires of the middle layer strands and the third layer steel wires of the outer layer strands are any one of common strength NT, high strength HT, ultrahigh strength ST, ultrahigh strength UT or ultrahigh strength MT.

Compared with the prior art, the utility model discloses the beneficial effect who reaches:

(1) the utility model is provided with fifteen strands of outer strand steel wires, which increases the gap, is beneficial to the rubber to fully permeate into the core strand steel wires, avoids the point contact friction between each layer of steel wires caused by not permeating enough rubber, and further avoids the problem that the bearing capacity of the steel cord is invalid due to abrasion;

(2) the utility model discloses set up third layer steel wire clearance and have 0.025mm at least, second layer steel wire clearance has 0.022mm at least, can improve anticorrosive, fatigue-resistant, shock resistance and the bonding retentivity of tire, has improved the life of tire.

Drawings

FIG. 1 is a schematic cross-sectional view of a steel cord for improving the penetration of a glue layer according to an embodiment of the present invention;

FIG. 2 is a cross-sectional schematic view of a steel cord of the prior art;

in fig. 1: 1. a core strand first layer of steel filaments; 2. a second layer of steel wires of the middle layer strand, 3 and a third layer of steel wires of the outer layer strand; 10. core strand steel wire; 20. middle layer strand steel wire; 30. outer layer strand steel wires; d1, first layer wire diameter; d2, second layer steel wire diameter; d3, third layer steel wire diameter; d4, steel wire diameter, L1 and third layer steel wire gap; l2, second layer wire gap.

Detailed Description

The present invention will be further described with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The utility model provides a cross section schematic diagram of high-permeability rubber layer structure steel cord is a 3 xd 1+9 xd 2+15 xd 3 steel cord, table 1 does the utility model relates to a data parameter of embodiment 1-8 of high-permeability rubber layer structure steel cord, the cross-section of steel cord is circular, core strand first layer steel wire 1 that the steel cord comprises three strands is compiled with the intermediate level thigh second floor steel wire 2 that nine strands are constituteed and is compiled with the fingers to form with outer thigh third layer steel wire 3 that fifteen strands are constituteed, the intermediate level thigh steel wire 20 that nine strands second layer steel wires 2 are constituteed is compiled with the fingers around the core strand steel wire 10 that three strands core strand first layer steel wire 1 is constituteed, the outer layer strand steel wire 30 that fifteen strands outer third layer steel wire 3 are constituteed is compiled with the fingers around the intermediate level thigh steel wire 20 that nine strands intermediate level thigh second floor steel wire 2 is constituteed. Wherein, the diameter range of the first layer of steel wires 1 is 0.19-0.26 mm, the diameter range of the second layer of steel wires 2 is 0.18-0.25 mm, the diameter range of the third layer of steel wires 3 is 0.17-0.24 mm, and the twisting directions of the core strand steel wires 10 and the steel wires in the middle layer strand steel wires 20 and the outer layer strand steel wires 30 are the same.

The utility model discloses form an outer steel wire clearance third layer steel wire clearance L1 has 0.025mm at least promptly, and intermediate level steel wire clearance second layer steel wire clearance L2 has 0.022 mm's high structure of oozing gluey steel cord at least.

The utility model discloses a change monofilament diameter ratio between each layer of steel cord, compensate because of the unreasonable defect of bringing of steel cord structural design, improve the intensity of steel cord and ooze gluey performance, shock resistance and fatigue resistance ability, reduce the air content between tire steel cord strand and the thigh, improve the life of tire cord intensity grade and tire.

In the embodiment of the present invention, the strength grades of the steel wires in the core strand steel wire 10, the middle layer strand steel wire 20 and the outer layer strand steel wire 30 are normal strength NT, high strength HT, super strength ST, extra high strength UT or extra high strength MT; the utility model is suitable for a to normal strength NT, high strength HT, superhigh strength ST, extra-high strength UT or high strength MT, the steel wire of arbitrary kind of intensity level is compiled and is twisted with fingers, can improve the intensity requirement of the steel cord that is compiled and is twisted with fingers the formation, ooze gluey performance and shock resistance, fatigue resistance ability.

TABLE 1

The first embodiment is as follows:

in this example, a 3 × 0.255+9 × 0.245+15 × 0.235ST structural steel cord was used for the radial tire reinforcing frame material. The diameter d1 of the first layer of steel wires in the core strand steel wires 10 in the structural steel cord is at least 0.01mm larger than the diameter d2 of the steel wires in the middle layer strand 20, the diameter d2 of the second layer of steel wires in the middle layer strand steel wires 20 is at least 0.01mm larger than the diameter d3 of the third layer of steel wires in the outer layer strand steel wires 30, the diameter of the first layer of steel wires 1 in the core strand in the steel cord is 0.255mm, and the diameter of the second layer of steel wires 2 in the middle layer is 0.245 mm. The diameter of the outer layer third layer steel wire 3 is 0.235mm, the twist pitch of the core strand first layer steel wire 1 is 18.0mm, the twist pitch of the middle layer second layer steel wire 2 is 12.5mm, the twist pitch of the outer layer third layer steel wire 3 is 18.0mm, the core strand steel wire 10 and the middle layer strand steel wire 20 and the outer layer strand steel wire 30 adopt the same twist direction, the twist direction is Z twist, the clearance between the middle layer strand steel wires 20, namely the second layer steel wire clearance L2 is 0.027mm, and the clearance between the outer layer strand steel wires 30, namely the third layer steel wire clearance L1 is 0.030 mm.

Fig. 2 is a schematic cross-sectional view of a steel cord in the prior art, which is a schematic cross-sectional view of a 3+9+15 × 0.245HT structural steel cord, the diameter of the 3+9+15 × 0.245HT structural steel cord is 1.51mm, the diameters of a core strand steel wire 10, a middle strand steel wire 20 and an outer strand steel wire 30 are both 0.245mm, the diameters of a core strand first layer steel wire 1, a middle strand second layer steel wire 2 and an outer strand third layer steel wire 3 are all ZZZ twisted, the lay length of the core strand first layer steel wire 1 is 6.3mm, the lay length of the middle strand second layer steel wire 2 is 12.5mm, and the lay length of the outer strand third layer steel wire 3 is 18.0 mm.

Table 2 shows the performance index comparison table of the 3+9+15 × 0.245HT structural steel cord commonly used for radial tires in the prior art and the embodiment of the present invention, i.e. the 3 × 0.255+9 × 0.245+15 × 0.235ST structural steel cord:

TABLE 2

As can be seen from FIG. 2 and Table 2, the breaking force of the steel cord of 3+9+ 15X 0.245HT structure is equal to or greater than 3730N, the breaking force/linear density is 363.5N/(g/m), the adhesive force is equal to or greater than 1600N/25mm,

the utility model discloses the diameter of the steel cord of figure 1 embodiment one is 1.51mm, core thigh steel wire 10 diameter is 0.255mm, intermediate level thigh steel wire 20 diameter is 0.245mm, outer thigh steel wire 30 diameter is 0.235, core thigh steel wire 1, intermediate level thigh steel wire 20, outer thigh steel wire 30 is ZZZ twists with fingers, the lay length of core thigh steel wire 10 is 18.0mm, the lay length of intermediate level thigh steel wire 20 is 12.5mm, the lay length of outer thigh steel wire 30 is 18.0mm, the clearance between intermediate level thigh steel wire 20 is second floor steel wire clearance L2 and is 0.027mm, the clearance between outer thigh steel wire 30 is third layer steel wire clearance L1 and is 0.03mm, the power of breaking is not less than 3900N, the power of breaking/linear density is 396.7N/(mm), the adhesive force is not less than 1600N 25 mm. Compared with the two, the embodiment of the utility model provides an adopt the steel wire of superhigh intensity grade, promote cord thread intensity, rate of glue penetration and fatigue resistance ability through core thigh, intermediate level thigh, outer thigh monofilament diameter proportion.

Example two:

in this example, 3 × 0.235+9 × 0.225+15 × 0.215ST structural steel cords were used for the radial tire reinforcing frame material. In this embodiment, the diameter of the steel wire d1 in the core strand 10 is at least greater than the diameter of the steel wire d2 in the middle layer strand 20 by 0.01mm, the diameter of the steel wire d2 in the middle layer strand 20 is at least greater than the diameter of the steel wire d3 in the outer layer strand 30 by 0.01mm, the diameter of the first layer steel wire 1 in the core strand in the steel cord is 0.235mm, the diameter of the second layer steel wire 2 in the middle layer is 0.225mm, the diameter of the third layer steel wire 3 in the outer layer strand is 0.215mm, the twisting pitch of the first layer steel wire 1 is 18.0mm, the twisting pitch of the second layer steel wire 2 is 12.5mm, the twisting pitch of the third layer steel wire 3 is 18.0mm, the core strand steel wire 1, the middle layer strand steel wire 2 and the outer layer steel wire 3 adopt the same twisting direction, the twisting direction is Z twisting, the L2 gap between the steel wires in the middle layer strand is 0.026mm, and the L1 gap between the outer layer steel wires is 0.029 mm.

The 3+9+ 15X 0.225ST structure steel cord is the steel cord among the prior art, its steel cord's diameter is 1.39mm, core strand steel wire 1 is 0.225mm with intermediate level thigh steel wire 2 and outer layer thigh steel wire 3 diameter, core strand steel wire 10, intermediate level thigh steel wire 20, outer layer thigh steel wire 30 is ZZZ twists with fingers, the lay length of core strand steel wire 10 is 6.3mm, the lay length of intermediate level thigh steel wire 20 is 12.5mm, the lay length of outer layer thigh steel wire 30 is 18.0 mm.

Table 3 is a table comparing performance indexes of 3+9+15 × 0.225ST structural steel cord commonly used in radial tires in the prior art and the two 3 × 0.235+9 × 0.225+15 × 0.215ST structural steel cords of the embodiment of the present invention:

TABLE 3

As can be seen from FIG. 2 and Table 3, the steel cord having a 3+9+ 15X 0.225ST structure had a breaking force of 3485N or more, a breaking force/linear density of 403.8N/(g/m), and an adhesive force of 1300N/25mm or more. The utility model discloses the diameter of two steel cord threads of figure 1 embodiment is 1.39mm, core thigh steel wire 10 diameter is 0.235mm, middle level thigh steel wire 20 diameter is 0.225mm, outer thigh steel wire 30 diameter is 0.215mm, core thigh steel wire 10, middle level thigh steel wire 20, outer thigh steel wire 30 is ZZZ twists with fingers, the lay length of core thigh steel wire 10 is 18.0mm, the lay length of middle level thigh steel wire 20 is 12.5mm, the lay length of outer thigh steel wire 30 is 18.0mm, the clearance between middle level thigh steel wire 20 is second floor steel wire clearance L2 and is 0.026mm, the clearance between outer thigh steel wire 30 is third layer steel wire clearance L1 and is 0.029mm, the breaking force is not less than 3500N, the breaking force/linear density is 425.3N/(mm), the adhesive force is not less than 1300N/25 mm. The embodiment of the utility model provides a two adopt the steel wire of superelevation intensity level, promote cord line intensity, glue permeation rate and fatigue resistance ability through core thigh, intermediate level thigh, outer thigh monofilament diameter proportion.

Example three:

in this example, 3 × 0.205+9 × 0.195+15 × 0.185UT structural steel cords were used for the radial tire reinforcing frame material. In this embodiment, the diameter of the steel wire d1 in the core strand 10 is at least 0.01mm larger than the diameter of the steel wire d2 in the intermediate layer strand 20, the diameter of the steel wire d2 in the intermediate layer strand 20 is at least 0.01mm larger than the diameter of the steel wire d3 in the outer layer strand 30, the diameter of the first layer steel wire 1 in the steel cord is 0.205mm, the diameter of the second layer steel wire 2 in the intermediate layer is 0.195mm, the diameter of the third layer steel wire 3 in the outer layer strand is 0.185mm, the lay length of the first layer steel wire 1 is 16.0mm, the lay length of the second layer steel wire 2 is 12.0mm, the lay length of the third layer steel wire 3 is 16.0mm, the core strand steel wire 1, the intermediate layer strand steel wire 2 and the outer layer steel wire 3 adopt the same lay direction, the lay direction is Z lay, the L2 gap between the intermediate layer steel wires is 0.023mm, the L1 gap between the outer layer steel wires is 0.027mm, and the L1 gap between the outer layer steel wires is 0.027mm,

The 3+9+ 15X 0.20ST structure steel cord is the steel cord among the prior art, its steel cord's diameter is 1.22mm, core strand steel wire 1 is 0.20mm with intermediate level thigh steel wire 2 and outer layer thigh steel wire 3 diameters, core strand steel wire 10, intermediate level thigh steel wire 20, outer layer thigh steel wire 30 is ZZZ twists with fingers, the lay length of core strand steel wire 10 is 6.3mm, the lay length of intermediate level thigh steel wire 20 is 12.5mm, the lay length of outer layer thigh steel wire 30 is 15.0 mm.

Table 4 is a table comparing performance indexes of 3+9+15 × 0.20ST structural steel cord commonly used for radial tires in the prior art and the three 3 × 0.205+9 × 0.195+15 × 0.185UT structural steel cord of the embodiment of the present invention:

TABLE 4

As can be seen from FIG. 2 and Table 4, the steel cord having a 3+9+ 15X 0.225ST structure had a breaking force of 3485N or more, a breaking force/linear density of 403.8N/(/ g/m), and an adhesive force of 500N/12.5mm or more. The utility model discloses the diameter of three steel cord threads of the embodiment of fig. 1 is 1.20mm, core thigh steel wire 10 diameter is 0.205mm, intermediate level thigh steel wire 20 diameter is 0.195mm, outer thigh steel wire 30 diameter is 0.185mm, core thigh steel wire 10, intermediate level thigh steel wire 20, outer thigh steel wire 30 is ZZZ twists with fingers, the lay length of core thigh steel wire 10 is 16.0mm, the lay length of intermediate level thigh steel wire 20 is 12.0mm, the lay length of outer thigh steel wire 30 is 16.0mm, the clearance between intermediate level thigh steel wire 20 is second floor steel wire clearance L2 and is 0.023mm, the clearance between outer thigh steel wire 30 is third layer steel wire clearance L1 and is 0.027mm, the breaking force is greater than or equal to 2850N, the breaking force/linear density is 463.4N/(mm), the adhesive force is greater than or equal to 500N/12.5 mm. The embodiment of the utility model provides a three adopt the steel wire of super high strength grade, promote cord thread intensity, glue permeation rate and fatigue resistance ability through core thigh, intermediate level thigh, outer thigh monofilament diameter proportion.

Can find out through the contrast above, when the radial tire of preparation equal density, adopt the utility model discloses the radial tire intensity of preparation improves 5% with the radial tire intensity that adopts prior art preparation, and the cord oozes gluey performance and fatigue resistance can improve by a wide margin. Just the utility model discloses can effectively reduce radial tire's manufacturing cost, prolong engineering vehicle radial tire's life.

The embodiment of the present invention is only an example, and can be adjusted according to different application occasions. The utility model discloses a 3 xd 1+9 xd 2+15 xd 3 structure, steel wire in the steel wire of core thigh 10 and the steel wire in the steel wire of intermediate level thigh 20 and the steel wire in the outer thigh steel wire 30 come the ratio according to steel wire diameter proportion scope and use different intensity, twist to can divide into ZZZ and SSS or ZZS and SSZ.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be considered as the protection scope of the present invention.

Claims (7)

1. The steel cord for improving the rubber layer infiltration is characterized by comprising core strand steel wires (10), middle layer strand steel wires (20) and outer layer strand steel wires (30), wherein the core strand steel wires (10) are formed by weaving and twisting at least three core strand first layer steel wires (1), at least nine middle layer strand second layer steel wires (2) and at least fifteen outer layer strand third layer steel wires (3) which are arranged layer by layer from inside to outside;

the middle layer strand steel wire (20) is arranged on the periphery of the core strand steel wire (10) along the circumferential direction, and the outer layer strand steel wire (30) is arranged on the periphery of the middle layer strand steel wire (20) along the circumferential direction;

the first layer steel wire diameter (d 1) of the first layer steel wire (1) is larger than the second layer steel wire diameter (d 2) of the second layer steel wire (2) of the middle layer strand, and the second layer steel wire diameter (d 2) is larger than the third layer steel wire diameter (d 3) of the third layer steel wire (3) of the outer layer strand.

2. A steel cord for improving glue line penetration as claimed in claim 1, wherein said first layer of steel filaments has a diameter (d 1) ranging from 0.19 to 0.26mm, said second layer of steel filaments has a diameter (d 2) ranging from 0.18 to 0.25mm, and said third layer of steel filaments has a diameter (d 3) ranging from 0.17 to 0.24 mm.

3. A steel cord for improving glue line penetration as claimed in claim 2, characterized in that said first layer steel wire diameter (d 1) is greater than 0.01mm compared to the second layer steel wire diameter (d 2), said second layer steel wire diameter (d 2) is greater than 0.01mm compared to the third layer steel wire diameter (d 3).

4. A steel cord for improving bondline penetration as claimed in claim 1, characterized in that said core strand steel filaments (10) have the same twist direction as the middle layer strand steel filaments (20) and the outer layer strand steel filaments (30).

5. A steel cord for improving bondline penetration as claimed in claim 1, wherein said outer strand third layer of steel filaments (3) has a lay length 1.333 to 1.50 times the lay length of the middle strand second layer of steel filaments (2), said core strand first layer of steel filaments (1) has a lay length equal to that of the outer strand third layer of steel filaments (3).

6. A steel cord for improving bondline penetration according to claim 1, characterized in that the third layer of steel wire interstices (L1) between said outer layer strand of steel wires (30) is larger than 0.025mm and the second layer of steel wire interstices (L2) between said middle layer of strand of steel wires (20) is larger than 0.022 mm.

7. A steel cord for improving bondline penetration according to claim 1, characterized in that said core strand first layer steel filaments (1), intermediate layer strand second layer steel filaments (2) and outer layer strand third layer steel filaments (3) have a strength grade of any one of normal strength NT, high strength HT, ultra high strength ST, ultra high strength UT or ultra high strength MT.

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