KR100314321B1 - Carcass ply for truck/bus tire - Google Patents
Carcass ply for truck/bus tire Download PDFInfo
- Publication number
- KR100314321B1 KR100314321B1 KR1019990035559A KR19990035559A KR100314321B1 KR 100314321 B1 KR100314321 B1 KR 100314321B1 KR 1019990035559 A KR1019990035559 A KR 1019990035559A KR 19990035559 A KR19990035559 A KR 19990035559A KR 100314321 B1 KR100314321 B1 KR 100314321B1
- Authority
- KR
- South Korea
- Prior art keywords
- truck
- tire
- carcass ply
- cord
- bus
- Prior art date
Links
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 17
- 239000010959 steel Substances 0.000 claims abstract description 17
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 8
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 8
- 239000000463 material Substances 0.000 abstract description 9
- 230000000694 effects Effects 0.000 abstract 1
- 239000010410 layer Substances 0.000 description 7
- 238000011156 evaluation Methods 0.000 description 5
- 230000006866 deterioration Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- 238000009661 fatigue test Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 230000003252 repetitive effect Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000011265 semifinished product Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/02—Carcasses
- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/0007—Reinforcements made of metallic elements, e.g. cords, yarns, filaments or fibres made from metal
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/02—Carcasses
- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
- B60C2009/0416—Physical properties or dimensions of the carcass cords
- B60C2009/0441—Density in width direction
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60C—VEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
- B60C9/00—Reinforcements or ply arrangement of pneumatic tyres
- B60C9/02—Carcasses
- B60C9/04—Carcasses the reinforcing cords of each carcass ply arranged in a substantially parallel relationship
- B60C2009/0416—Physical properties or dimensions of the carcass cords
- B60C2009/0466—Twist structures
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
Abstract
본 발명은 트럭이나 버스의 타이어에 적용되는 고강도 스틸 코드를 사용하여 고하중에 견딜 수 있도록 내구성을 강화하고 경량화한 트럭-버스용 타이어의 카카스 플라이에 관한 것으로, 상기 카카스 플라이에 적용하는 스틸 코드는 탄소함유량이 0.80 ~ 0.85% 인 하이텐사일(고강도) 재질로서, 직경이 0.22mm인 필라멘트 12가닥을 각각을 모두 S방향으로 꼰 구조(12X0.22)이며, 상기 스틸 코드는 15 ~ 17 EPI 계수로 조절하여 배열한 것을 특징으로 하며, 강도의 증가, 내피로특성의 향상 및 코드 층간 마모현상의 최소화로 내구성의 증가라는 효과을 얻을 수 있다.The present invention relates to a carcass ply of a tire for truck-buses which has a high durability and light weight to withstand high loads by using a high strength steel cord applied to a tire of a truck or a bus, and a steel cord applied to the carcass ply. Is a high tensile (high strength) material with a carbon content of 0.80 to 0.85%, and 12 filaments having a diameter of 0.22 mm are all braided in the S direction (12X0.22), and the steel cord is 15 to 17 EPI. It is characterized by the arrangement arranged by the modulus, it is possible to obtain the effect of increased durability by increasing the strength, fatigue resistance characteristics and minimization of wear between the layers of the cord.
Description
본 발명은 타이어의 반제품 중에서 카카스(Carcass : 타이어코드층) 플라이에 관한 것으로, 특히 트럭이나 버스의 타이어에 적용되는 고강도 스틸 코드를 사용하여 고하중에 견딜 수 있도록 내구성을 강화하고 경량화한 트럭/버스용 타이어의 카카스 플라이에 관한 것이다.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carcass (tire cord layer) fly among semi-finished products, and particularly to a truck / bus that is durable and lightweight to withstand high loads by using a high strength steel cord applied to a tire of a truck or a bus. Relates to the carcass ply of a dragon tire.
일반적으로 공기입 타이어는 사용대상에 따라서 트럭/버스용, 소형 트럭용, 대형 중장비용 그리고 승용차용으로 구분되는 것이 보편적인데, 이중 트럭/버스용 타이어는 트럭이나 버스 자체의 중량이나 운반물의 중량을 고려하여 고하중과 과도한 스트레스에 잘 견딜 수 있는 재질과 구조를 가지고 있어야 하며, 종래의 트럭/버스용 타이어는 한 장 이상의 카카스 플라이와 3장 이상의 벨트 플라이로 구성되어, 이들이 타이어의 하중을 지지하도록 되어 있으며, 이 때 타이어의 내구성을 높이기 위하여 고무층에는 통상적으로 스틸 코드가 매립된다.In general, pneumatic tires are generally divided into truck / bus, small truck, large heavy equipment, and passenger car depending on the intended use. Dual truck / bus tires are used to determine the weight of the truck or bus itself or the weight of the package. In consideration of high loads and excessive stress, it must have a material and structure, and conventional truck / bus tires consist of one or more carcass plies and three or more belt plies, which support the load of the tires. In this case, in order to increase the durability of the tire, a rubber cord is usually embedded in the rubber layer.
타이어에 사용되는 스틸 코드의 재질은 종래에는 탄소함유량이 0.67 ~ 0.73% 정도인 노말텐사일(Normal Tensile) 코드였으며, 그 구조 또한 3층 형상이나 2층형상을 하고 있다.Steel cords used in tires have conventionally been normal tensile cords having a carbon content of about 0.67 to 0.73%. The structure is also three-layered or two-layered.
그러나 이와 같은 재질과 구조 하의 타이어는 코드 강도가 낮으며, 탄소함유량의 차이에 의해 내피로특성이 저하하는 문제점이 있으며, 2, 3층연 구조에 따른 코드 층간 마멸 현상으로 타이어의 내구성의 열화와 함께 동적 내피로특성이 저하하는 문제점이 있다.However, tires under such materials and structures have a low cord strength and have a problem of fatigue resistance deterioration due to a difference in carbon content, and wear and tear of cords due to cord layer wear due to two and three layered structures. There is a problem that the dynamic fatigue resistance is reduced.
또한 카카스 플라이로 사용되는 코드 구조 중 대부분이 WARP 코드를 포함하고 있어, 반복피로특성이 취약하고, 높은 중량을 나타내는 문제점이 있다.In addition, since most of the code structure used as a carcass ply includes a WARP code, the repetitive fatigue characteristics are weak, and there is a problem of high weight.
본 발명은 상기한 문제점을 해결하기 위하여 안출된 것으로서, 고하중하에서도 내구성이 있고 견고하며, 동적 피로특성이 우수함은 물론 중량 또한 기존의 카카스 플라이와 비교하여 감소된 고강도 스틸 코드를 사용한 트럭/버스용 타이어의 카카스 플라이를 제공함을 목적으로 한다.SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and is durable and robust even under high loads, and has excellent dynamic fatigue characteristics, as well as weight and truck / bus using a high strength steel cord, which is reduced compared to conventional carcass plies. An object is to provide a carcass ply of a dragon tire.
도 1은 본 발명에 따른 트럭/버스용 타이어의 카카스 플라이의 구조를 나타낸 개략도이다.1 is a schematic diagram showing the structure of a carcass ply of a truck / bus tire according to the present invention.
상기한 목적을 달성하기 위하여, 본 발명은 트럭/버스용 타이어의 카카스 플라이에 있어서, 12가닥의 필라멘트를 한묶음으로 S방향으로 꼬아 만든 단층연 스틸 코드로 구성되며, 상기 스틸 코드의 재질은 탄소함유량이 0.80 ~ 0.85%인 것을 특징으로 한다.여기서, 상기 스틸 코드의 배열은 15 ~ 17 EPI로 구성되어 있다.In order to achieve the above object, the present invention is a carcass ply of a truck / bus tire, comprising a single stranded steel cord twisted in the S direction in a bundle of 12 filaments, the material of the steel cord is carbon The content is 0.80 to 0.85%. Here, the steel cord array is composed of 15 to 17 EPI.
이하, 첨부도면에 의거하여 본 발명에 따른 트럭/버스용 타이어의 카카스 플라이를 상세히 설명하면 다음과 같다. 도 1은 본 발명에 따른 트럭/버스용 타이어의 카카스 플라이의 구조를 나타낸 도면이다.Hereinafter, a carcass ply of a truck / bus tire according to the present invention will be described in detail with reference to the accompanying drawings. 1 is a view showing the structure of a carcass ply of a truck / bus tire according to the present invention.
도면에서 보는 바와 같이, 본 발명에서는 트럭/버스용 타이어의 카카스 플라이의 스틸 코드 재질을 종래의 노말텐사일 코드 대신에 고강도의 하이텐사일 코드를 채용하여 강도를 증가시켰고, 12X0.22 구조를 사용하여 코드 층간 마멸현상을 최소화하여 동적피로특성을 향상시키고 내구성을 증진시켰다.As shown in the drawing, in the present invention, the steel cord material of the carcass ply of the truck / bus tire is adopted to increase the strength by adopting a high strength high tensile cord instead of the conventional normal tensile cord, By minimizing the wear between the layers of the cord, the dynamic fatigue characteristics were improved and the durability was improved.
다시 말해, 본 발명에 따른 카카스 플라이의 스틸 코드의 구조는 12가닥의 필라멘트 각각을 모두 S방향으로 꼰 구조이고, 한 가닥은 직경이 0.22mm의 것(12X0.22)을 사용하며, 그 재질은 탄소함유량이 0.80 ~ 0.85% 인 하이텐사일(고강도)이다.In other words, the structure of the steel cord of the carcass ply according to the present invention is a structure in which each of the filaments of 12 strands are all braided in the S direction, one strand is used (12X0.22) having a diameter of 0.22mm, the material Silver is high tensile (high strength) with a carbon content of 0.80 to 0.85%.
또한 본 발명에 의한 스틸 코드를 사용할 경우에는 고강도의 재질에서 기인하는 전체 강도의 증가로 EPI 계수(End Per Inch : 인치당 코드사의 수)가 작아도 되므로, 상기 스틸 코드를 15 ~ 17 EPI 계수로 조절하여 배열함으로써 타이어 전체 중량을 약 8%정도 감소시켰다.In addition, when the steel cord according to the present invention is used, the EPI coefficient (End Per Inch: number of cord yarns per inch) may be small due to the increase in the overall strength resulting from a high strength material, so that the steel cord is adjusted to 15 to 17 EPI coefficients. The arrangement reduced the total weight of the tire by about 8%.
이하 표 1에서는 본 발명에서 채용한 코드의 특성을 종래 기술에 따른 코드와 비교하여 설명한다.Table 1 below describes the characteristics of the code employed in the present invention in comparison with the code according to the prior art.
표 1 : 코드 특성Table 1: Code Properties
** B.S : Breaking Strength** B.S: Breaking Strength
R.B.T : Rotate Beam fatigue TestR.B.T: Rotate Beam fatigue Test
또한 본 발명의 고강도 스틸 코드 카카스 구조를 적용하여 티비래디알(TB-Radial)타이어를 제조하여 평가한 결과는 다음의 표 2와 같다.In addition, by applying a high-strength steel cord carcass structure of the present invention, the results of manufacturing and evaluating a TB-Radial tire are shown in Table 2 below.
표 2 : 시험 평가 결과Table 2: Test Evaluation Results
시험 평가 규격 : 11.00 R 20 16P 975 PTNTest Evaluation Specification: 11.00 R 20 16P 975 PTN
본 발명은 트럭-버스용 타이어의 카카스 플라이에 있어서 기존 스틸 코드 재질인 노말텐사일을 하이텐사일 코드로 변경하여 강도의 증가와 함께 코드 재질 변경에 따른 금속 조직의 변경으로 탄소함유량에 관계하는 내피로특성의 향상을 가져왔으며, 구조도 12X0.22를 채용함으로써 2층 또는 3층연 구조에서 단층연 구조로 변경하여 코드 층간 마모현상을 최소화하여 내구력을 증진시켰다.The present invention relates to the carbon content of the carcass ply of truck-bus tires by changing the normal tensile, which is a conventional steel cord material, to a high tensile cord and increasing the strength and changing the metal structure according to the cord material change. The fatigue resistance has been improved, and by adopting the 12X0.22 structure, it has been changed from the two-layer or three-layer lead structure to the single-layer lead structure to minimize the wear between the cord layers, thereby improving durability.
또한 코드 강도의 증가로 EPI계수를 저감하고, 코드 직경과 압연 두께를 감소시켜 타이어 중량을 약 8% 정도 감소시키는 효과를 얻었다.In addition, by increasing the cord strength, the EPI coefficient was reduced, and the cord diameter and the rolling thickness were reduced to reduce the tire weight by about 8%.
Claims (1)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990035559A KR100314321B1 (en) | 1999-08-26 | 1999-08-26 | Carcass ply for truck/bus tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1019990035559A KR100314321B1 (en) | 1999-08-26 | 1999-08-26 | Carcass ply for truck/bus tire |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| KR20010019247A KR20010019247A (en) | 2001-03-15 |
| KR100314321B1 true KR100314321B1 (en) | 2001-11-15 |
Family
ID=19608725
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| KR1019990035559A KR100314321B1 (en) | 1999-08-26 | 1999-08-26 | Carcass ply for truck/bus tire |
Country Status (1)
| Country | Link |
|---|---|
| KR (1) | KR100314321B1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200076999A (en) | 2018-12-20 | 2020-06-30 | 효성첨단소재 주식회사 | Aramid dip cord, and its use in carcass and truck-bus radial tires |
-
1999
- 1999-08-26 KR KR1019990035559A patent/KR100314321B1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20200076999A (en) | 2018-12-20 | 2020-06-30 | 효성첨단소재 주식회사 | Aramid dip cord, and its use in carcass and truck-bus radial tires |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20010019247A (en) | 2001-03-15 |
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