CN113293632A - Compact steel cord with 2+ M + N structure and manufacturing method thereof - Google Patents
Compact steel cord with 2+ M + N structure and manufacturing method thereof Download PDFInfo
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- CN113293632A CN113293632A CN202110718745.1A CN202110718745A CN113293632A CN 113293632 A CN113293632 A CN 113293632A CN 202110718745 A CN202110718745 A CN 202110718745A CN 113293632 A CN113293632 A CN 113293632A
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- cord
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B1/00—Constructional features of ropes or cables
- D07B1/06—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core
- D07B1/0673—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration
- D07B1/0686—Ropes or cables built-up from metal wires, e.g. of section wires around a hemp core having a rope configuration characterised by the core design
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1012—Rope or cable structures characterised by their internal structure
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/10—Rope or cable structures
- D07B2201/1012—Rope or cable structures characterised by their internal structure
- D07B2201/102—Rope or cable structures characterised by their internal structure including a core
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- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2001—Wires or filaments
- D07B2201/2002—Wires or filaments characterised by their cross-sectional shape
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2001—Wires or filaments
- D07B2201/2006—Wires or filaments characterised by a value or range of the dimension given
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2201/00—Ropes or cables
- D07B2201/20—Rope or cable components
- D07B2201/2047—Cores
- D07B2201/2048—Cores characterised by their cross-sectional shape
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2401/00—Aspects related to the problem to be solved or advantage
- D07B2401/20—Aspects related to the problem to be solved or advantage related to ropes or cables
- D07B2401/208—Enabling filler penetration
-
- D—TEXTILES; PAPER
- D07—ROPES; CABLES OTHER THAN ELECTRIC
- D07B—ROPES OR CABLES IN GENERAL
- D07B2501/00—Application field
- D07B2501/20—Application field related to ropes or cables
- D07B2501/2046—Tire cords
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- Ropes Or Cables (AREA)
Abstract
The invention discloses a compact steel cord with a 2+ M + N structure and a manufacturing method of the compact steel cord with the 2+ M + N structure, wherein the compact steel cord is composed of two special-shaped central steel wires, M first sheath steel wires and N second sheath steel wires, and the M first sheath steel wires and the N second sheath steel wires are twisted around the central steel wires in the same twisting direction and twisting distance to form the cord. The steel wires of the specification are in line contact with the compact open type cord, so that the fatigue performance of the steel cord is improved, the permeability of rubber is increased, and air in the steel cord after vulcanization of the tire is reduced or eliminated, so that the corrosion resistance of the tire is improved, and the service life of the tire is prolonged.
Description
Technical Field
The invention relates to the technical field of steel cords, in particular to a compact steel cord with a 2+ M + N structure and a manufacturing method thereof.
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 a 1+ M + 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 meanwhile, the glue permeation effect is poor. It is therefore desirable to provide a steel cord which overcomes the above-mentioned disadvantages.
Disclosure of Invention
The object of the present invention is to provide a compact steel cord with a 2+ M + N structure to solve the problems set forth in the background art above.
In order to achieve the purpose, the invention provides the following technical scheme: a compact steel cord with a 2+ M + N structure comprises two central steel wires, a first outer layer and a second outer layer which are arranged from inside to outside in sequence, and is characterized in that the first outer layer comprises M first sheath steel wires, the second outer layer comprises N second sheath steel wires, the M first sheath steel wires and the N second sheath steel wires are twisted around the two central steel wires in the same twisting direction and the same twisting distance, the cross section of each central steel wire is circular or elliptical, the diameter or the minor axis length of each central steel wire is D0, the diameter of each first sheath steel wire is D1, and the diameter of each second sheath steel wire is D2; wherein when M is less than or equal to 7, D0 is less than or equal to D1 is more than or equal to D2; when M is greater than 7, D0 is greater than or equal to 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 D0 of the section of the central steel wire is 0.1-0.44 mm.
Further, M is equal to 6 and N is equal to 12, the minor axis length D0 of the center steel wire is smaller than or equal to the diameter D1 of the first sheath steel wire, and the diameter D1 of the first sheath steel wire is larger than or equal to the diameter D2 of the second sheath steel wire.
Further, M is equal to 8 and N is equal to 14, the length of the short axis of the center steel wire D0 is greater than or equal to the diameter of the first sheath steel wire D1, and the diameter of the first sheath steel wire D1 is greater than or equal to the diameter of the second sheath steel wire D2.
Furthermore, the ratio of D1 to D2 is in the range of 1-1.3.
The manufacturing method of the steel cord provided by the invention comprises the following steps: s1: the central steel wire is deformed and is directly drawn and formed by penetrating the central steel wire into a die; s2: and twisting, namely twisting M first sheath steel wires and N second sheath steel wires on two central steel wires by a stranding machine in the same twisting phase and twisting distance to finish the production of the compact steel cord with a 2+ M + N structure.
The invention has the technical effects and advantages that:
the novel high-performance steel cord with a better section shape comprises a core layer and an outer cladding layer, wherein the number of steel wires in the core layer is 2, the number of the steel wires in the outer cladding layer is M, N, the steel cord has a flattened oval cross section comprising a long shaft and a short shaft, the permeability and the strength of rubber are improved, and meanwhile, the rubber permeability of the structure is good, the anchoring property of the core steel wires is better, and the residual stress of the core steel wires is limited, so that after the structure is coated with rubber, the tilting amount of the end parts of the steel cord fabric is obviously better than that of the existing 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 5 of the present invention;
FIG. 3 is a view schematically showing the structure of embodiments 2, 3, 4 of the present invention;
fig. 4 schematically shows the structure of embodiment 6 of the present invention.
Wherein: a center wire 100, a first sheath wire 200, and a second sheath wire 300.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention provides a compact steel cord with a 2+ M + N structure, which comprises two central steel wires 100, a first outer layer and a second outer layer which are sequentially arranged from inside to outside, and is characterized in that the first outer layer comprises M first sheath steel wires 200, the second outer layer comprises N second sheath steel wires 300, the M first sheath steel wires 200 and the N second sheath steel wires 300 are twisted around the two central steel wires 200 in the same twisting direction and the same twisting distance, the cross section of each central steel wire is circular or elliptical, the diameter or the minor axis length of each central steel wire is D0, the diameter of each first sheath steel wire is D1, and the diameter of each second sheath steel wire is D2; wherein when M is less than or equal to 7, D0 is less than or equal to D1 is more than or equal to D2; when M is greater than 7, D0 is greater than or equal to D1 is greater than or equal to D2.
Wherein, under the condition that the cross section of the central steel wire 100 is in an ellipse shape, the eccentricity of the cross section of the central steel wire 100 is between 0.4 and 0.8, the value of the major axis a of the cross section of the central steel wire 100 is between 0.15 and 0.52mm, and the length D0 of the minor axis of the cross section of the central steel wire 100 is between 0.1 and 0.44 mm.
When M is equal to 6 and N is equal to 12, the minor axis length D0 of the center steel wire is less than or equal to the diameter D1 of the first sheath steel wire, and the diameter D1 of the first sheath steel wire is greater than or equal to the diameter D2 of the second sheath steel wire.
When M is equal to 8 and N is equal to 14, the minor axis length D0 of the center steel wire is greater than or equal to the diameter D1 of the first sheath steel wire, and the diameter D1 of the first sheath steel wire is greater than or equal to the diameter D2 of the second sheath steel wire.
Wherein the ratio of D1 to D2 is 1-1.3.
The manufacturing method of the steel cord provided by the invention comprises the following steps: s1: the central steel wire is deformed and is directly drawn and formed by penetrating the central steel wire into a die; s2: and twisting, namely twisting M first sheath steel wires and N second sheath steel wires on two central steel wires by a stranding machine in the same twisting phase and twisting distance to finish the production of the compact steel cord with a 2+ M + N structure.
Example 1
The cross section of the central steel wire is circular, 2 central steel wires are arranged, 6 first sheath steel wires 200 and 12 second sheath steel wires 300 are arranged, the diameter of the first sheath steel wire is 0.21mm, the diameter of the second sheath steel wire is 0.18mm, and the diameter D0 value of the central steel wire is 0.18 mm.
Example 2
The cross section of the central steel wire is oval, and comprises 2 central steel wires, 6 first sheath steel wires 200 and 12 second sheath steel wires 300, the diameter of the first sheath steel wire is 0.30mm, the diameter of the second sheath steel wire is 0.28mm, the value of the major axis a of the cross section of the central steel wire is 0.35mm, and the length D0 of the minor axis of the cross section of the central steel wire is 0.22 mm.
Example 3
The cross section of the central steel wire is oval, and comprises 2 central steel wires, 6 first sheath steel wires 200 and 12 second sheath steel wires 300, the diameter of the first sheath steel wire is 0.15mm, the diameter of the second sheath steel wire is 0.13mm, the value of the long axis a of the cross section of the central steel wire is 0.15mm, and the length D0 of the short axis of the cross section of the central steel wire is 0.10 mm.
Example 4
The cross section of the central steel wire is oval, and comprises 2 central steel wires, 6 first sheath steel wires 200 and 12 second sheath steel wires 300, the diameter of the first sheath steel wire is 0.55mm, the diameter of the second sheath steel wire is 0.53mm, the value of the major axis a of the cross section of the central steel wire is 0.52mm, and the length D0 of the minor axis of the cross section of the central steel wire is 0.44 mm.
Example 5
The cross section of the central steel wire is circular, 2 central steel wires are arranged, 8 first sheath steel wires 200 and 14 second sheath steel wires 300 are arranged, the diameter of the first sheath steel wire is 0.185mm, the diameter of the second sheath steel wire is 0.185mm, and the diameter D0 value of the central steel wire is 0.20 mm.
Example 6
The cross section of the central steel wire is oval, and comprises 2 central steel wires, 8 first sheath steel wires 200 and 14 second sheath steel wires 300, the diameter of the first sheath steel wire is 0.30mm, the diameter of the second sheath steel wire is 0.30mm, the value of the major axis a of the cross section of the central steel wire is 0.38mm, and the length D0 of the minor axis of the cross section of the central steel wire is 0.30 mm.
The obtained products were subjected to data testing using 1+6+12 and 3+9+15 steel cords of conventional shapes currently on the market as comparative examples 1 and 2 in combination with examples 1 to 6, and the testing data are as follows:
the steel wire strength in table 1 is indicated by a market strength grade HT.
As can be seen from the above table, in the embodiments 1 to 6, air remaining in the steel cord after rubber vulcanization is effectively reduced or eliminated, and the rubber penetration property of the steel cord is improved. The performance is better than that of comparative examples 1-2.
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 may be made to the embodiments or portions thereof without departing from the spirit and scope of the invention.
Claims (6)
1. A compact steel cord with a 2+ M + N structure, comprising two central steel wires, a first outer layer and a second outer layer which are arranged in sequence from inside to outside, wherein the first outer layer comprises M first sheath steel wires, the second outer layer comprises N second sheath steel wires, the M first sheath steel wires and the N second sheath steel wires are twisted around the two central steel wires in the same twisting direction and the same twisting pitch, the cross section of the central steel wire is circular or elliptical, the diameter or minor axis length of the central steel wire is D0, the diameter of the first sheath steel wire is D1, and the diameter of the second sheath steel wire is D2; wherein when M is less than or equal to 7, D0 is less than or equal to D1 is more than or equal to D2; when M is greater than 7, D0 is greater than or equal to D1 is greater than or equal to D2.
2. A compact steel cord with a structure of 2+ M + N as claimed in claim 1, characterized in that said center steel filament has an oval cross-section, said center steel filament has a cross-section eccentricity of 0.4-0.8, said center steel filament has a cross-section with a major axis a having a value of 0.15-0.52mm, and said center steel filament has a cross-section with a minor axis length D0 of 0.1-0.44 mm.
3. A compact steel cord with a structure of 2+ M + N according to claim 2, characterized in that M is equal to 6 and N is equal to 12, the minor axis length D0 of said center steel filament is smaller or equal to the diameter D1 of the first sheath steel filaments, the diameter D1 of said first sheath steel filaments is larger or equal to the diameter D2 of the second sheath steel filaments.
4. A compact steel cord with a structure of 2+ M + N according to claim 2, characterized in that M is equal to 8 and N is equal to 14, said center steel filament has a minor axis length D0 being greater than or equal to the diameter D1 of the first sheath steel filaments, said first sheath steel filaments have a diameter D1 being greater than or equal to the diameter D2 of the second sheath steel filaments.
5. A compact steel cord with a structure of 2+ M + N as claimed in claim 2, characterized in that said ratio D1 to D2 is in the range of 1-1.3.
6. A method for manufacturing a compact steel cord with a 2+ M + N structure according to any one of claims 1-5, characterized in that it comprises the steps of:
s1: the central steel wire is deformed and is directly drawn and formed by penetrating the central steel wire into a die;
s2: and twisting, namely twisting M first sheath steel wires and N second sheath steel wires on two central steel wires in the same twisting direction and twisting distance through a stranding machine to finish the production of the compact steel cord with a 2+ M + N structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110718745.1A CN113293632A (en) | 2021-06-28 | 2021-06-28 | Compact steel cord with 2+ M + N structure and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110718745.1A CN113293632A (en) | 2021-06-28 | 2021-06-28 | Compact steel cord with 2+ M + N structure and manufacturing method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN113293632A true CN113293632A (en) | 2021-08-24 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110718745.1A Withdrawn CN113293632A (en) | 2021-06-28 | 2021-06-28 | Compact steel cord with 2+ M + N structure and manufacturing method thereof |
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| CN (1) | CN113293632A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024103435A1 (en) * | 2022-11-14 | 2024-05-23 | 江苏兴达钢帘线股份有限公司 | Steel cord having 2+1+6 structure and manufacturing method therefor |
-
2021
- 2021-06-28 CN CN202110718745.1A patent/CN113293632A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2024103435A1 (en) * | 2022-11-14 | 2024-05-23 | 江苏兴达钢帘线股份有限公司 | Steel cord having 2+1+6 structure and manufacturing method therefor |
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Application publication date: 20210824 |