CN217419126U - Compact steel cord with 2+ N structure - Google Patents
Compact steel cord with 2+ N structure Download PDFInfo
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- CN217419126U CN217419126U CN202121449874.7U CN202121449874U CN217419126U CN 217419126 U CN217419126 U CN 217419126U CN 202121449874 U CN202121449874 U CN 202121449874U CN 217419126 U CN217419126 U CN 217419126U
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Abstract
The utility model discloses a compact steel cord with 2+ N structure and a manufacturing method of the steel cord. Constitute by the central steel wire of 2 dysmorphism and a plurality of sheath steel wires, improved the permeability and the intensity of rubber, simultaneously because this structure rubber permeability is good, better to the anchor nature of core steel wire, the residual stress of core steel wire is restricted, makes the utility model discloses after the structure covers glues, the tip perk volume of wire cord fabric is obviously good with current structure. In addition, the steel cord fatigue performance is improved because of the tight cord and the line contact between the layer steel wires.
Description
Technical Field
The utility model relates to a steel cord technical field, in particular to compact steel cord with 2+ N structure.
Background
The steel cord is a thin steel strand or rope which is made of high-quality high-carbon steel, has brass plated on the surface and has special purposes. The rubber composite material is mainly used for car tires, light truck tires, heavy truck tires, engineering machinery vehicle tires, airplane tires and other rubber product framework materials. The radial ply tire manufactured by adopting the steel cord as the reinforcing material has the advantages of long service life, high driving speed, puncture resistance, good elasticity, safety, comfort, fuel saving and the like.
The existing steel cord structure is of a circular section, the steel cord produced by the structure is thicker than a flat cord, more rubber is used for manufacturing tires, the size and weight of the tires are large, and the problems of high energy consumption in production and use of the tires exist. Therefore, in order to save energy and reduce the requirement for environmental pollution, the lightweight tire is more and more popular in the markets of both suppliers and demanders. Flattening of tire frame materials is just one way to achieve light tire weight, namely, flattened steel cords are used to reduce the thickness of belted layer steel cord fabrics, so that the purpose of light tire weight is achieved by reducing the amount of rubber in the tire.
The existing steel cord with the 1+ N structure is easy to cause the warp of cord fabric due to poor anchoring property of steel wires and rubber of a core part, and simultaneously has poor glue permeation effect, and the strength of a tire adopting the steel cord has defects.
It is therefore desirable to provide a steel cord which overcomes the above-mentioned disadvantages.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a compact type steel cord with 2+ N structure to solve the problem that proposes in the above-mentioned background art.
In order to achieve the above purpose, the utility model provides a following technical scheme: a compact steel cord with a 2+ N structure comprising 2 center steel filaments and N sheath steel filaments twisted around said center steel filaments in the same twist direction and the same twist pitch, said center steel filaments having a circular or elliptical cross-section, said center steel filaments having a diameter or a minor axis length of D1, each said sheath steel filament having a diameter of D2; wherein when N is less than or equal to 7, D1 is less than or equal to D2; when N is greater than 7, D1 is greater than or equal to D2.
Furthermore, the section of the central steel wire is elliptical, the eccentricity of the section of the central steel wire is 0.4-0.8, the major axis a of the section of the central steel wire is 0.15-0.52mm, and the minor axis length D1 of the section of the central steel wire is 0.10-0.46 mm.
Further, N is equal to 6, and the minor axis length D1 of the center steel wire is less than or equal to the diameter D2 of the sheath steel wire.
Further, N is equal to 8, and the minor axis length D1 of the center steel wire is greater than or equal to the diameter D2 of the sheath steel wire.
Furthermore, the ratio of D1 to D2 is in the range of 0.5-1.5.
The utility model provides a manufacturing method of this steel cord, including following step:
s1: deforming the central steel wire, and passing the central steel wire into a die for direct drawing forming;
s2: and (4) twisting, namely twisting the sheath steel wires on the central steel wire obtained in the step S1 through a stranding machine, wherein 2 central steel wires and N sheath steel wires have the same twisting direction and twisting distance, and the manufacturing of the steel cord product is completed.
The utility model discloses a technological effect and advantage:
the utility model provides a novel steel cord of high performance with more excellent cross sectional shape, this steel cord include sandwich layer and surrounding layer, the sandwich layer includes that the steel wire number is 2, the surrounding layer includes that the number of steel wires is N, the steel cord has the oval cross section of flattening including major axis and minor axis, has improved the permeability and the intensity of rubber, simultaneously because this structure rubber permeability is good, and is better to the anchorage nature of core steel wire, and the residual stress of core steel wire is restricted, makes the utility model discloses after the structure covers the glue, the tip perk volume of steel cord fabric is obviously good with current structure; and, because of the compact cord, the layer steel wires are in line contact, thereby improving the fatigue performance of the steel cord.
Drawings
Fig. 1 schematically shows the structure of embodiment 1 of the present invention;
fig. 2 schematically shows the structure of embodiment 4 of the present invention;
fig. 3 schematically shows the structure of embodiments 2, 3 of the present invention;
fig. 4 schematically shows the structure of embodiments 5 and 6 of the present invention.
Wherein, the center steel wire 100; a sheath wire 200.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The utility model provides a pair of compact steel cord with 2+ N structure, including 2 central steel wires 100 and N sheath steel wires 200, N the sheath steel wire 200 centers on central steel wire 100 twists with the same lay direction and the same lay length with the twist, the cross-section of central steel wire 100 is circular or oval, and is corresponding, when central steel wire cross-section is circular, its diameter is D1, when the cross-section of central steel wire is oval, its minor axis length is D1, the diameter of every sheath steel wire 200 is D2; wherein when N is less than or equal to 7, D1 is less than or equal to D2; when N is greater than 7, D1 is greater than or equal to D2.
Wherein, under the condition that the section of the central steel wire 100 is in an ellipse, the eccentricity of the section of the central steel wire 100 is between 0.4 and 0.8, the value of the major axis a of the section of the central steel wire 100 is between 0.15 and 0.52mm, and the length D1 of the minor axis of the section of the central steel wire 100 is between 0.10 and 0.46 mm.
The ratio of D1 to D2 is 0.5-1.5, when D1 is smaller than D2, the ratio is generally 0.85, and when D1 is larger than D2, the ratio is generally 1.15.
The utility model provides a manufacturing method of steel cord, including following step: deforming the central steel wire 100, and penetrating the central steel wire 100 into a die for direct drawing forming; and twisting, namely twisting the sheath steel wires 200 on the central steel wire 100 obtained in the step S1 by a strander, wherein 2 central steel wires and N sheath steel wires have the same twisting direction and the same twisting pitch, and manufacturing a steel cord product.
Example 1
The cross-section of the central wire is circular, with 2 central wires, and 6 sheath wires, the diameter of the sheath wires being 0.21mm, the diameter D1 value of the central wires being 0.18 mm.
Example 2
The cross section of the central steel wire is oval, 2 central steel wires and 6 sheath steel wires are arranged, the diameter of each sheath steel wire is 0.15mm, the long axis a value of the cross section of each central steel wire is 0.15mm, and the length D1 of the short axis of the cross section of each central steel wire is 0.10 mm.
Example 3
The cross section of the center wire is oval, and has 2 center wires and 6 sheath wires, the diameter of the sheath wire is 0.34mm, the major axis a of the cross section of the center wire is 0.36mm, and the minor axis length D1 of the cross section of the center wire is 0.26 mm.
Example 4
The cross-section of the central steel wire is circular, with 2 central steel wires, and 8 sheath steel wires, the diameter of the sheath steel wires being 0.185mm, the diameter D1 value of the central steel wires being 0.20 mm.
Example 5
The cross section of the center wire is oval, and has 2 center wires and 8 sheath wires, the diameter of the sheath wire is 0.235mm, the value of the major axis a of the cross section of the center wire is 0.38mm, and the length D1 of the minor axis of the cross section of the center wire is 0.25 mm.
Example 6
The cross section of the center wire is oval, and has 2 center wires and 8 sheath wires, the diameter of the sheath wire is 0.44mm, the value of the major axis a of the cross section of the center wire is 0.52mm, and the length D1 of the minor axis of the cross section of the center wire is 0.44 mm.
The obtained products were subjected to data tests using 1+6 and 3+6 steel cords of conventional shapes currently on the market as comparative examples 1 and 2, in combination with examples 1 to 6, and the test data are as follows:
in conjunction with the tables, it can be seen that the present examples 1 to 6 effectively reduce or eliminate the air remaining in the steel cord after rubber vulcanization, improving the rubber penetration properties of the steel cord.
Finally, it should be noted that: although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that modifications and variations can be made in the embodiments or in part of the technical features of the embodiments without departing from the spirit and the scope of the invention.
Claims (5)
1. A compact steel cord with a 2+ N structure, characterized by comprising 2 center steel filaments and N sheath steel filaments, said sheath steel filaments being twisted around said center steel filaments in the same twist direction and at the same twist pitch, said center steel filaments being circular or elliptical in cross-section, said center steel filaments having a diameter or minor axis length of D1, each of said sheath steel filaments having a diameter of D2; wherein when N is less than or equal to 7, D1 is less than or equal to D2; when N is greater than 7, D1 is greater than or equal to D2.
2. A compact steel cord with a 2+ N structure as claimed in claim 1, characterized in that said center steel wire has an oval cross-section, said center steel wire has an eccentricity in the cross-section of 0.4-0.8, said center steel wire has a cross-section with a major axis a having a value of 0.15-0.52mm, and said center steel wire has a cross-section with a minor axis length D1 of 0.10-0.46 mm.
3. A compact steel cord with a 2+ N structure according to claim 2, characterized in that N is equal to 6, the minor axis length D1 of said center steel filaments being smaller than or equal to the diameter D2 of the sheath steel filaments.
4. A compact steel cord with a 2+ N structure according to claim 2, characterized in that N is equal to 8, the minor axis length D1 of said center steel filaments being larger than or equal to the diameter D2 of the sheath steel filaments.
5. A compact steel cord with a 2+ N structure as claimed in claim 2, characterized in that said ratio D1 to D2 is in the range of 0.5-1.5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121449874.7U CN217419126U (en) | 2021-06-28 | 2021-06-28 | Compact steel cord with 2+ N structure |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121449874.7U CN217419126U (en) | 2021-06-28 | 2021-06-28 | Compact steel cord with 2+ N structure |
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| CN217419126U true CN217419126U (en) | 2022-09-13 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293633A (en) * | 2021-06-28 | 2021-08-24 | 嘉兴东方钢帘线有限公司 | Compact steel cord with 2+ N structure and manufacturing method thereof |
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2021
- 2021-06-28 CN CN202121449874.7U patent/CN217419126U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113293633A (en) * | 2021-06-28 | 2021-08-24 | 嘉兴东方钢帘线有限公司 | Compact steel cord with 2+ N structure and manufacturing method thereof |
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