CN103738122B - All-steel radial tyre of a kind of two layers of U-shaped steel wire reinforced bead and preparation method thereof - Google Patents
All-steel radial tyre of a kind of two layers of U-shaped steel wire reinforced bead and preparation method thereof Download PDFInfo
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- CN103738122B CN103738122B CN201410007596.8A CN201410007596A CN103738122B CN 103738122 B CN103738122 B CN 103738122B CN 201410007596 A CN201410007596 A CN 201410007596A CN 103738122 B CN103738122 B CN 103738122B
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- 239000011324 bead Substances 0.000 title claims abstract description 90
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 89
- 239000010959 steel Substances 0.000 title claims abstract description 89
- 238000002360 preparation method Methods 0.000 title abstract description 4
- 239000004744 fabric Substances 0.000 claims abstract description 90
- 238000010030 laminating Methods 0.000 claims abstract description 11
- 239000003292 glue Substances 0.000 claims abstract description 5
- 238000000034 method Methods 0.000 claims description 11
- 238000007493 shaping process Methods 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 4
- 238000004073 vulcanization Methods 0.000 claims description 3
- 238000013461 design Methods 0.000 abstract description 6
- 238000011161 development Methods 0.000 abstract description 6
- 230000007547 defect Effects 0.000 abstract description 3
- 125000004122 cyclic group Chemical group 0.000 abstract description 2
- 238000012360 testing method Methods 0.000 description 6
- 239000002390 adhesive tape Substances 0.000 description 5
- 239000002131 composite material Substances 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 230000003014 reinforcing effect Effects 0.000 description 3
- 239000013536 elastomeric material Substances 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 238000004513 sizing Methods 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000009418 renovation Methods 0.000 description 1
- 238000007619 statistical method Methods 0.000 description 1
- 208000024891 symptom Diseases 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
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- Ropes Or Cables (AREA)
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Abstract
The present invention relates to and a kind ofly adjust all-steel radial tyre of tyre bead ladle structure and preparation method thereof.A kind of all-steel radial tyre of two layers of U-shaped steel wire reinforced bead, this tire comprises crown, tire shoulder, casingply, inside liner, bracing ply and tyre bead, described tyre bead comprises bead coil, triangle rubber and rim of the mouth and protects glue, described casingply anti-package bead coil, the both sides of casingply are respectively equipped with the first wirecord fabric enhancement Layer and the second wirecord fabric enhancement Layer, and a wirecord fabric enhancement Layer laminating is arranged between casingply and inside liner; The second described wirecord fabric enhancement Layer to be arranged on outside tyre bead between casingply and triangle rubber.The all-steel radial tyre that the present invention designs tyre bead can reduce the defect of bead effectively, reduce tire and pay compensation for rate, can not only reduce the loss for enterprise, also can improve the cyclic utilization rate of tire by actv., meet the business philosophy of current sustainable development and saving.
Description
Technical field
The present invention relates to the manufacture field of all-steel radial tyre, particularly relate to and a kind ofly adjust all-steel radial tyre of tyre bead ladle structure and preparation method thereof.
Background technology
Along with developing rapidly of auto-industry, more and more higher to the requirement of tyre performance, so compared with bias tire, the all-steel radial tyre with good wear-resisting fuel-economizing obtains the development be exceedingly fast, and has become the main product of tire industry.But the performance and used life affecting tire that tyre bead problem can be serious in all-steel radial tyre driving process, thus the design improvement of bead structure has become one of main construction of domestic and international each giant tyre enterprise.The body cord of radial-ply tyre radially arranges, and sidewall is then more soft, and in tire running process, tyre bead is stressed very large, less stable, and the ability of tyre bead portion opposing high load capacity is lower.Under high-load condition, often there is the situation such as breach, distortion in tyre bead portion, so the rigidity in order to ensure tyre bead, improve the rideability of tire, tyre bead portion must be strengthened, and make to have between tyre bead and the sidewall of softness a suitable rigidity excessive simultaneously, prevent that stress is concentrated, improve the rideability of tire.
China's tire industry, through the development of decades, defines than more complete industrial system, and in recent years, along with the fast development of auto-industry, the growth rate of tire industry attracts people's attention especially, and China has become the maximum tire production state in the whole world.Having the high performance all steel load radial tires such as energy-conservation, safe and durable at present, is the main product of world's tire development.But the performance and used life affecting tire that tyre bead problem can be serious in all-steel radial tyre driving process.The body cord of radial-ply tyre radially arranges, sidewall is then more soft, in tire running process, in order to ensure the rigidity of tyre bead, improve the rideability of tire, tyre bead portion must be strengthened, and makes to have between tyre bead and the sidewall of softness a suitable rigidity excessive simultaneously, prevent that stress is concentrated, improve the rideability of tire.
Chinese utility model patent (application number: 02234433.0 applying date: 2002-05-10) discloses a kind of reinforcing structure for seam allowance of full steel wire heavy load radial tire, mainly contain steel bead wire, the composite filled adhesive tape of two kinds of performance difference obvious elastomeric material compositions, radial carcass cord layer by layer, bead second wirecord fabric enhancement Layer and fiber/rubber combined enhancement Layer composition, it is characterized in that, from tire section, steel bead wire top is by two kinds of composite filled adhesive tape that the obvious elastomeric material of difference forms in hardness, near the radial carcass cord sizing material that its end points hardness in bead apex is low after steel bead wire bottom reversed layer by layer, there is the rim of the mouth second wirecord fabric enhancement Layer of one deck bottom steel bead wire in carcass ply outside layer by layer, fiber/rubber combined enhancement Layer is had outside the wirecord fabric enhancement Layer of rim of the mouth second.
Chinese utility model patent (application number: 200820149422.5 applyings date: 2008-09-25) discloses a kind of radial tire deadblow out portion reinforcing structure of all-steel load radial tire, comprise wire bead, composite bead bead apex, casingply is provided with outside wire bead and composite filled adhesive tape, rim of the mouth steel wire infantees is provided with outside casingply, casingply anti-package end points, higher than the outer end points of rim of the mouth steel wire infantees, has the wear-resisting glue in one deck rim of the mouth and sidewall rubber outside the steel wire infantees of rim of the mouth.Be provided with end-blocking adhesive tape above casingply anti-package end points and the outer end points of rim of the mouth steel wire infantees, end-blocking adhesive tape is by complete for end points outside casingply anti-package end points and rim of the mouth steel wire infantees coated closed.The rim of the mouth that the utility model is taked is strengthened mode and is strengthened the region of bead most fragile emphatically but not strengthen the entirety of tyre bead portion, and the bulk strength of bead area increases appropriateness thus ensure that the impact in service life of shoulder zone less.
Chinese invention patent (application number: 201310113155.1 applyings date: 2013-04-03) discloses heavier-duty load-carrying whole steel wire radial tyre, carcass outside, rim of the mouth place is provided with the double-deck heel fabric for being pushed down by carcass anti-package end points, steel wire heel fabric and steel wire heel fabric U-shaped encapsulated by structures rim of the mouth place carcass, rim of the mouth intensity can be increased like this, stop rim of the mouth Problems existing.And rim of the mouth adopts U-shaped packet form, carcass anti-package end points is pushed down, and adopt 15 degree of angles, rim of the mouth steel wire is soft simultaneously, instead of as carcass 90 degree, end points is also neat, and rigidity is too strong, excessively not smooth, by hard steel wire once excessively to soft sizing material.After like this improving now by firmly to soft gradually excessively, rim of the mouth can be made to split to reel off raw silk from cocoons with rim of the mouth greatly to improve, extend service life, saved resource.
All-steel radial tire quality problems have very most of quality problems for tyre bead portion, and this is also one of significant technology issues of facing of domestic and international tire enterprise, and the present invention is just based on the achievement of the market demand and enterprise's long-term technology tackling key problem.
Summary of the invention
In order to solve the technological deficiency that tyre bead exists, the object of the invention is the all-steel radial tyre that a kind of two layers of U-shaped steel wire reinforced bead will be provided, on the basis not affecting other performance of tire, significantly strengthen the resistance to top load performance of tyre bead portion and the endurance quality of tire, do not affect its renovation performance, and it is more reasonable that tyre bead and tire shoulder are mated simultaneously.Second object of the present invention is to provide a kind of method preparing the all-steel radial tyre of two layers of above-mentioned U-shaped steel wire reinforced bead.
In order to realize first above-mentioned object, present invention employs following technical scheme:
A kind of all-steel radial tyre of two layers of U-shaped steel wire reinforced bead, this tire comprises crown, tire shoulder, casingply, inside liner, bracing ply and tyre bead, described tyre bead comprises bead coil, glue is protected in triangle rubber and rim of the mouth, described casingply anti-package bead coil, the both sides of casingply are respectively equipped with the first wirecord fabric enhancement Layer and the second wirecord fabric enhancement Layer, one wirecord fabric enhancement Layer laminating is arranged between casingply and inside liner, it is U-shaped that first wirecord fabric enhancement Layer walks around bead coil cross section, the inner side end points of the first wirecord fabric enhancement Layer is higher than the anti-package end points of casingply, outer point is lower than the anti-package end points of casingply, the second described wirecord fabric enhancement Layer to be arranged on outside tyre bead between casingply and triangle rubber, it is U-shaped that second wirecord fabric enhancement Layer walks around bead coil cross section, and the inner side end points of the second wirecord fabric enhancement Layer and outer point are all lower than the outer point of the first wirecord fabric enhancement Layer.
As preferably, the described outer point of the first wirecord fabric enhancement Layer and the differential of the anti-package end points of casingply are 10 ~ 20mm, and the differential of anti-package end points of inner side end points and casingply is 2 ~ 10mm.
As preferably, the wirecord fabric width of the first described wirecord fabric enhancement Layer is 140 ~ 185mm, and thickness is 2.0 ~ 3.0mm.
As preferably, the outer point of the second described wirecord fabric enhancement Layer and inner side end points are all 5 ~ 20mm with the differential of outer point of the first wirecord fabric enhancement Layer.
As preferably, the wirecord fabric width 50 ~ 100mm of the second described wirecord fabric enhancement Layer, thickness is 2.0 ~ 3.0mm.
As preferably, the steel cord of the first described wirecord fabric enhancement Layer and the second wirecord fabric enhancement Layer adopts the steel wire of varying strength, and the steel cord intensity of the first wirecord fabric enhancement Layer is greater than the steel cord of the second wirecord fabric enhancement Layer.The steel cord of two layers of ladle structure adopts dissimilar steel wire.The U-shaped steel wire reinforcing layer material arrangements of internal layer is relatively more even, the reasonable submissive transition of proof stress.Outer enhancement Layer adopts high tensile steel wire, and its severing width is shorter, can ensure tire and wheel rim contact area rigidity, prevent from reeling off raw silk from cocoons.
As preferred again, the steel cord of the second described wirecord fabric enhancement Layer adopts general strength wire, the intensity of general strength wire is 2000 ~ 2500MPa, and the steel cord of the first wirecord fabric enhancement Layer adopts high tensile steel wire, and the intensity of high tensile steel wire is 2500 ~ 4500MPa.
As preferably, the first described wirecord fabric enhancement Layer and the second wirecord fabric enhancement Layer are by parallel steel wire and rubber composition, and steel wire and tire circumference have 30 ~ 45° angle degree.
In order to realize second above-mentioned object, present invention employs following technical scheme:
Prepare a method for above-mentioned all-steel radial tyre, the method comprises the following steps:
1) previously prepared first wirecord fabric enhancement Layer and the second wirecord fabric enhancement Layer;
2), when green tyres is shaping, by mechanical device, the first wirecord fabric enhancement Layer and the second wirecord fabric enhancement Layer are passed on forming machine auxiliary drum;
3) to fit on inside liner the first wirecord fabric enhancement Layer;
4) symmetrical laminating casingply again;
5) casingply laminating arranges the second wirecord fabric enhancement Layer;
6) all the other forming steps are carried out;
7) after shaping, tyre vulcanization is checked, packed.
The present invention is owing to have employed above-mentioned technical scheme, the all-steel radial tyre adopting the present invention to design tyre bead can reduce the defect of bead effectively, reduce tire and pay compensation for rate, can not only reduce the loss for enterprise, also can improve the cyclic utilization rate of tire by actv., meet the business philosophy of current sustainable development and saving.By trial-production and the lathe durability test cycle of this product, achieve breakthrough results, compared with prior art, the present invention can increase bead durability energy by actv..Meanwhile, technical scheme of the present invention is simple and reliable and easy to implement in technology, can directly put into operation.
Accompanying drawing explanation
Fig. 1 is the bead structure schematic diagram of all-steel radial tyre of the present invention.
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is made a detailed explanation.
An all-steel radial tyre for two layers of U-shaped steel wire reinforced bead, this tire comprises crown, tire shoulder, casingply 1, inside liner 2, bracing ply and tyre bead.As shown in Figure 1, described tyre bead comprises bead coil 7, triangle rubber 3 and rim of the mouth and protects glue 4, described casingply 1 anti-package bead coil 7, and the both sides of casingply 1 are respectively equipped with the first wirecord fabric enhancement Layer 5 and the second wirecord fabric enhancement Layer 6.First wirecord fabric enhancement Layer 5 laminating is arranged between casingply 1 and inside liner 2, it is U-shaped that first wirecord fabric enhancement Layer 5 walks around bead coil 7 cross section, the inner side end points of the first wirecord fabric enhancement Layer 5 is higher than the anti-package end points of casingply 1, differential is 2 ~ 10mm, outer point is lower than the anti-package end points of casingply 1, and differential is 10 ~ 20mm.First wirecord fabric enhancement Layer 5 is made up of parallel steel wire and rubber, and steel wire and tire circumference have 30 ° of angles, and wirecord fabric width is 150mm, and thickness is 2.3mm, and steel cord adopts high tensile steel wire, and the intensity of high tensile steel wire is 2500 ~ 4500MPa.
As shown in Figure 1, the second described wirecord fabric enhancement Layer 6 to arrange outside tyre bead between casingply 1 and triangle rubber 3, it is U-shaped that second wirecord fabric enhancement Layer 6 walks around bead coil 7 cross section, and the inner side end points of the second wirecord fabric enhancement Layer 6 and outer point are all lower than the outer point of the first wirecord fabric enhancement Layer 5.Second wirecord fabric enhancement Layer 6 is made up of parallel steel wire and rubber, steel wire and tire circumference have 30 ° of angles, the wirecord fabric width 85mm of the second wirecord fabric enhancement Layer 6, and thickness is 2.3mm, steel cord adopts general strength wire, and the intensity of high tensile steel wire is 2000MPa.
Manufacture the method for the radial-ply tyre of above-mentioned employing the design bead structure, the method comprises the following steps:
1) previously prepared first wirecord fabric enhancement Layer 5 and the second wirecord fabric enhancement Layer 6;
2), when green tyres is shaping, by mechanical device, the first wirecord fabric enhancement Layer 5 and the second wirecord fabric enhancement Layer 6 are passed on forming machine auxiliary drum;
3) to fit on inside liner 2 first wirecord fabric enhancement Layer 5;
4) symmetrical laminating casingply 1 again;
5) casingply 1 laminating arranges the second wirecord fabric enhancement Layer 6;
6) all the other forming steps are carried out;
7) after shaping, tyre vulcanization is checked, packed.
After testing, the present invention has following effect:
One, this invention can significantly improve the bead durability energy of tire
Designing tyre of the present invention and original structure tire are at standard load 160%, and carrying out repeatedly bead durability under the test condition of standard pressure 80% can test.Machine tool data contrast is as follows:
| Bead durability can be tested | First time contrast | Second time contrast | Third time contrast |
| Standard tire | 74 | 75h | 75h |
| Design experiment tire of the present invention | 151h | 120h | 123h |
Data Comparison by the tyre bead machine test time: standard tire is durable is 50 ~ 90h; Invention designing tyre is durable is 100 ~ 150h, and bead durability can improve more than 30% by actv., can improve tyre performance by actv. like this.Show machine tool data and pay compensation for that there is good conformability by statistical analysis, pay compensation for can reduce by 50% as tyre bead, bring huge economic benefit by for enterprise.
Two, the anti-top load performance of reinforced bead, improves tyre bead safety
The quality accident 40% of automobile comes from tire, and tyre bead odd test is fried is also one of typical defect in home market, and this invention design strengthens the anti-of tyre bead and carries performance, effectively can reduce the quality accident because tire causes, and ensures the security of the lives and property of user.
Three, the refresh rate of tire is improved
Bead distortion are one of main symptom affecting tyre rebuilding recycle, and the outer enhancement Layer ladle structure that the present invention adopts effectively can suppress the torsional deformation of tyre bead under high load capacity, significantly improves rate of reoperative tyre, is conducive to realizing recycle, environmental protection.
Claims (7)
1. the all-steel radial tyre of one kind two layers U-shaped steel wire reinforced bead, this tire comprises crown, tire shoulder, casingply (1), bracing ply, inside liner (2) and tyre bead, described tyre bead comprises bead coil (7), glue (4) is protected in triangle rubber (3) and rim of the mouth, described casingply (1) anti-package bead coil (7), it is characterized in that: the both sides of casingply (1) are respectively equipped with the first wirecord fabric enhancement Layer (5) and the second wirecord fabric enhancement Layer (6), first wirecord fabric enhancement Layer (5) laminating is arranged between casingply (1) and inside liner (2), it is U-shaped that first wirecord fabric enhancement Layer (5) walks around bead coil (7) cross section, the inner side end points of the first wirecord fabric enhancement Layer (5) is higher than the anti-package end points of casingply (1), outer point is lower than the anti-package end points of casingply (1), the second described wirecord fabric enhancement Layer (6) is arranged between casingply outside tyre bead (1) and triangle rubber (3), it is U-shaped that second wirecord fabric enhancement Layer (6) walks around bead coil (7) cross section, and the inner side end points of the second wirecord fabric enhancement Layer (6) and outer point are all lower than the outer point of the first wirecord fabric enhancement Layer (5), the described outer point of the first wirecord fabric enhancement Layer (5) and the differential of the anti-package end points of casingply (1) are 10 ~ 20mm, and the differential of anti-package end points of inner side end points and casingply (1) is 2 ~ 10mm, the outer point of the second wirecord fabric enhancement Layer (6) and inner side end points are all 5 ~ 20mm with the differential of outer point of the first wirecord fabric enhancement Layer (5).
2. the all-steel radial tyre of a kind of two layers of U-shaped steel wire reinforced bead according to claim 1, is characterized in that: the wirecord fabric width of the first wirecord fabric enhancement Layer (5) is 140 ~ 185mm, and thickness is 2.0 ~ 3.0mm.
3. the all-steel radial tyre of a kind of two layers of U-shaped steel wire reinforced bead according to claim 1, is characterized in that: the wirecord fabric width 50 ~ 100mm of the second wirecord fabric enhancement Layer (6), thickness is 2.0 ~ 3.0mm.
4. the all-steel radial tyre of a kind of two layers of U-shaped steel wire reinforced bead according to claim 1, it is characterized in that: the steel cord of the first described wirecord fabric enhancement Layer (5) and the second wirecord fabric enhancement Layer (6) adopts the steel wire of varying strength, and the steel cord intensity of the first wirecord fabric enhancement Layer (5) is greater than the steel cord of the second wirecord fabric enhancement Layer (6).
5. the all-steel radial tyre of a kind of two layers of U-shaped steel wire reinforced bead according to claim 4, it is characterized in that: the steel cord of the second described wirecord fabric enhancement Layer (6) adopts general strength wire, the intensity of general strength wire is 2000 ~ 2500MPa, the steel cord of the first wirecord fabric enhancement Layer (5) adopts high tensile steel wire, and the intensity of high tensile steel wire is 2500 ~ 4500MPa.
6. the all-steel radial tyre of a kind of two layers of U-shaped steel wire reinforced bead according to claim 1, it is characterized in that: the first wirecord fabric enhancement Layer (5) and the second wirecord fabric enhancement Layer (6) are by parallel steel wire and rubber composition, and steel wire and tire circumference have 30 ~ 45° angle degree.
7. prepare a method for the all-steel radial tyre of two layers of U-shaped steel wire reinforced bead described in claim 1 ~ 6 any one claim, it is characterized in that the method comprises the following steps:
1) previously prepared first wirecord fabric enhancement Layer (5) and the second wirecord fabric enhancement Layer (6);
2), when green tyres is shaping, by mechanical device, the first wirecord fabric enhancement Layer (5) and the second wirecord fabric enhancement Layer (6) are passed on forming machine auxiliary drum;
3) at upper laminating first wirecord fabric enhancement Layer (5) of inside liner (2);
4) symmetrical laminating casingply (1) again;
5) casingply (1) laminating arranges the second wirecord fabric enhancement Layer (6);
6) all the other forming steps are carried out;
7) after shaping, tyre vulcanization is checked, packed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410007596.8A CN103738122B (en) | 2014-01-07 | 2014-01-07 | All-steel radial tyre of a kind of two layers of U-shaped steel wire reinforced bead and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410007596.8A CN103738122B (en) | 2014-01-07 | 2014-01-07 | All-steel radial tyre of a kind of two layers of U-shaped steel wire reinforced bead and preparation method thereof |
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| Publication Number | Publication Date |
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| CN103738122A CN103738122A (en) | 2014-04-23 |
| CN103738122B true CN103738122B (en) | 2016-03-23 |
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| CN201410007596.8A Active CN103738122B (en) | 2014-01-07 | 2014-01-07 | All-steel radial tyre of a kind of two layers of U-shaped steel wire reinforced bead and preparation method thereof |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109109576A (en) * | 2018-08-29 | 2019-01-01 | 江苏通用科技股份有限公司 | Reinforced meridian tubeless bead structure |
| CN109849590B (en) * | 2019-02-28 | 2020-12-04 | 安徽佳通乘用子午线轮胎有限公司 | Pneumatic tire capable of reducing rolling resistance |
| CN109835124B (en) * | 2019-02-28 | 2021-01-01 | 安徽佳通乘用子午线轮胎有限公司 | Tire capable of reducing rolling resistance and keeping seam allowance durable |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2081533A1 (en) * | 1992-09-16 | 1994-03-17 | Thomas Joseph Segatta | Tire with apex rubber blend |
| CN1319052A (en) * | 1998-07-23 | 2001-10-24 | 米凯林技术公司 | Reinforced radical tyre bead |
| CN102463854A (en) * | 2010-11-15 | 2012-05-23 | 住友橡胶工业株式会社 | Truck tire |
| CN203681165U (en) * | 2014-01-07 | 2014-07-02 | 中策橡胶集团有限公司 | All-steel radial tire with two-layer U-shaped steel wire reinforcing tire bead |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4255262B2 (en) * | 2002-10-09 | 2009-04-15 | 横浜ゴム株式会社 | Pneumatic tire |
| US7017635B2 (en) * | 2002-12-27 | 2006-03-28 | The Goodyear Tire & Rubber Company | Tire with outside-in ply construction |
-
2014
- 2014-01-07 CN CN201410007596.8A patent/CN103738122B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2081533A1 (en) * | 1992-09-16 | 1994-03-17 | Thomas Joseph Segatta | Tire with apex rubber blend |
| CN1319052A (en) * | 1998-07-23 | 2001-10-24 | 米凯林技术公司 | Reinforced radical tyre bead |
| CN102463854A (en) * | 2010-11-15 | 2012-05-23 | 住友橡胶工业株式会社 | Truck tire |
| CN203681165U (en) * | 2014-01-07 | 2014-07-02 | 中策橡胶集团有限公司 | All-steel radial tire with two-layer U-shaped steel wire reinforcing tire bead |
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| CN103738122A (en) | 2014-04-23 |
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Address after: 310018 No. 1, No. 1 Street, Qiantang District, Hangzhou, Zhejiang Patentee after: Zhongce Rubber Group Co.,Ltd. Address before: 310018 No.2, 10th Street, Hangzhou Economic and Technological Development Zone, Zhejiang Province Patentee before: ZHONGCE RUBBER GROUP Co.,Ltd. |