KR20120001055A - Pneumatic tire with excellent bead structure and method of manufacturing thereof - Google Patents
Pneumatic tire with excellent bead structure and method of manufacturing thereof Download PDFInfo
- Publication number
- KR20120001055A KR20120001055A KR1020100061631A KR20100061631A KR20120001055A KR 20120001055 A KR20120001055 A KR 20120001055A KR 1020100061631 A KR1020100061631 A KR 1020100061631A KR 20100061631 A KR20100061631 A KR 20100061631A KR 20120001055 A KR20120001055 A KR 20120001055A
- Authority
- KR
- South Korea
- Prior art keywords
- bead
- apex
- heavy
- reinforcement
- bead core
- Prior art date
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Classifications
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- 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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
- B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
-
- 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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
- B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
- B60C15/0632—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer using flippers in contact with and wrapped around the bead core and, at least partially, in contact with the bead filler
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- 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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
- B60C2015/0617—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a cushion rubber other than the chafer or clinch rubber
- B60C2015/0625—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a cushion rubber other than the chafer or clinch rubber provided at the terminal edge portion of a carcass or reinforcing layer
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- 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
- B60C15/00—Tyre beads, e.g. ply turn-up or overlap
- B60C15/06—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead
- B60C15/0628—Flipper strips, fillers, or chafing strips and reinforcing layers for the construction of the bead comprising a bead reinforcing layer
- B60C2015/0678—Physical properties of the bead reinforcing layer, e.g. modulus of the ply
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- Tires In General (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Abstract
The present invention discloses a heavy duty pneumatic radial tire having a bead portion reinforcement structure and a method of manufacturing the same.
Heavy-duty pneumatic radial tires having a bead reinforcement structure according to the present invention are tread, sidewall, bead, and ends that extend from the tread and extend the bead. In a heavy-duty pneumatic radial tire comprising a carcass ply having an end, the bead portion includes a bead core, an apex and a reinforcement portion, wherein the bead core portion is provided with a plurality of bead core portions. Made of a bead wire, wherein the apex portion is a soft rubber material formed integrally with the bead core portion, the reinforcement portion wraps the bead core portion and the apex portion, the outside of the bead portion equal to the height of the end It is characterized in that it is formed or low, thereby improving the adhesion between the bead bundle and the carcass, thereby improving the durability of the bead portion Furthermore, reducing the waste of material that is generated during the extrusion and apex portion, it is possible to improve the operability accompanying.
Description
The present invention relates to a heavy-duty pneumatic radial tire having a bead portion reinforcement structure and a method of manufacturing the same, and more particularly, to improve adhesion between the bead bundle and carcass, thus improving the durability of the bead portion and further extrusion of the apex portion. The present invention relates to a heavy-duty pneumatic radial tire having a bead portion reinforcing structure capable of reducing waste of materials generated during the work and improving workability accordingly.
In general, pneumatic tires used for heavy loads need to reinforce the bead to withstand high loads, which means that the stress applied by pneumatic tires is greatest at the interface with the wheels attached to the rim. This is because the phenomenon of breakage or separation of the bead portion occurs at the interface.
1 is a right half sectional view of a conventional pneumatic tire.
Referring to FIG. 1, a
The
Furthermore, in the
Furthermore, in order to strengthen the bead portion of the pneumatic tire, a structure in which two or four nylon chafers are attached to the turn-up portions of the carcass and the steel chafers in and out is used. The bead reinforcement structure not only concentrates the stress at the bead site during overloading but also changes the carcass line in the bent area so that it can not support this, and in the end, the cord breakage may occur at the bead part, resulting in the risk of large accidents. In order to improve this problem, methods such as changing the apex height and attaching a nylon chaper to the inside and outside of the carcass turn-up part have been proposed, but there is still a problem that a cord rupture phenomenon occurs in the bead part.
In more detail, through the structure of the reinforcement of the conventional bead portion through Figure 2, Figure 2 is a right half cross-sectional view to enlarge the bead portion of the pneumatic tire conceptually showing the shape reinforcing the structure of the conventional bead portion, the reinforcement structure of the conventional bead portion is a plurality Two
However, as mentioned above, even in this conventional technology, the problem of weakening the seating and durability of the bead bundle due to the decrease in adhesion force generated at the interface between the
On the other hand, due to the fact that the hard apex (HARD APEX, 240) and the soft apex (SOFT APEX, 250) constituting the apex unit integrally extruded, the problem of inevitably occurring material waste and workability is reduced.
Therefore, the first technical problem to be solved by the present invention is to improve the adhesion between the bead bundle and the carcass, thus improving the durability of the bead portion and further reduce the waste of material generated during extrusion of the apex portion, resulting in workability To provide a heavy-load pneumatic radial tire having a bead portion reinforcement structure that can improve the.
In addition, the second technical problem to be solved by the present invention is to improve the adhesion between the bead bundle and the carcass, thus improving the durability of the bead portion and further reduce the waste of material generated during extrusion of the apex portion, resulting in workability It is to provide a manufacturing method of a pneumatic radial tire for a heavy load having a bead portion reinforcement structure that can improve the.
The present invention to solve the first technical problem described above,
Heavy-duty pneumatics comprising a tread, a side wall, a bead and a carcass ply having an extension extending from the tread and an end that wraps around the bead In a radial tire, the bead part comprises a bead core, an apex part and a reinforcing part, wherein the bead core part includes a plurality of bead wires, and the apex part is a soft rubber material. It is formed integrally with the bead core portion, the reinforcement portion is wrapped around the bead core portion and the apex portion, the outside of the bead portion is a heavy load air having a bead portion reinforcement structure, characterized in that formed in the same or lower than the height of the end Provides mouth radial tires.
According to one embodiment of the invention, the reinforcing portion may be made of a hard rubber material.
According to another embodiment of the present invention, the soft rubber material may have a volume modulus of 2 to 10 MPa.
According to another embodiment of the present invention, the hard rubber material may have a volume modulus of 2 to 10 MPa.
On the other hand, the present invention in order to solve the above-described second technical problem by sequentially stacking the carcass ply, reinforcement to the upper portion of the brada provided on the tire molding machine and attaching the bead core unit and the apex unit integrally coupled The present invention provides a method for manufacturing a heavy-load pneumatic radial tire having a bead portion reinforcement structure, which is manufactured by turning up the carcass splice and the reinforcement portion with respect to the bead core portion and the apex portion.
Heavy-duty pneumatic radial tires having a bead portion reinforcement structure and a manufacturing method thereof according to the present invention improve the adhesion between the bead bundle and the carcass, thus improving the durability of the bead portion and furthermore, It has the effect of reducing waste and improving workability accordingly.
1 is a right half cross-sectional view of a conventional pneumatic tire.
2 is an enlarged right half sectional view of a bead portion of a pneumatic tire conceptually showing a shape in which a structure of a conventional bead portion is reinforced.
3 is an enlarged right half sectional view of the bead portion of a heavy-load pneumatic radial tire having a bead portion reinforcement structure according to the present invention.
Hereinafter, the present invention will be described in more detail.
As described below, the present invention will be described by way of example, but only by way of example, which is merely illustrative, and those skilled in the art to which the present invention pertains various modifications and equivalent embodiments thereof. I understand that it is possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.
The invention is a heavy load including a tread, a sidewall, a bead and a carcass ply having an extension extending from the tread and an end that wraps around the bead. In a medium pneumatic radial tire, the bead portion includes a bead core, an apex and a reinforcement, wherein the bead core includes a plurality of bead wires, and the apex portion is a soft rubber. The material is integrally formed with the bead core part, and the reinforcement part surrounds the bead core part and the apex part and is formed to be equal to or lower than the height of the end portion outside the bead part.
3 is an enlarged right half sectional view of the bead portion of a heavy-load pneumatic radial tire having a bead portion reinforcement structure according to the present invention.
Referring to FIG. 3, an
Although the
In addition, the reinforcing
In addition, the
On the other hand, the reinforcing
In the case of compressing an object, the volume elastic modulus described here is expressed as
<
Pressure (p) =
In
If the volume modulus of elasticity of the hard rubber material is less than 2 MPa, it may be difficult to provide reinforcement to solve the problem that the adhesion force is reduced by the external force received by the
In addition, as long as the soft rubber material is rubber having a volume modulus of 2 to 10 MPa, the type and amount thereof are not limited. If it is less than 2 MPa, it is difficult to minimize the dispersion of the
On the other hand, the heavy-load pneumatic radial tire having a bead portion reinforcement structure according to the present invention, the
The
Accordingly, waste and work of materials generated in the process of extruding the soft and hard apex, which is a conventional process, and attaching them to the bead bundle, and then turning up with a carcass splice provided on the upper portion of the brada provided on the tire forming machine. It will be possible to improve sex.
Apex
Wrapping
Claims (5)
The bead part includes a bead core, an apex part and a reinforcing part,
The bead core portion comprises a plurality of bead wires, the apex portion is formed of a soft rubber material integrally with the bead core portion, the reinforcement portion is wrapped around the bead core portion and the apex portion, outside the bead portion A heavy-loaded pneumatic radial tire having a bead portion reinforcement structure, characterized in that it is formed equal to or less than the height of the end.
The reinforcement portion is a heavy-duty pneumatic radial tire having a bead portion reinforcement structure, characterized in that made of a hard rubber material.
The soft rubber material has a bulk elastic pneumatic radial tire having a bead portion reinforcement structure, characterized in that the volume modulus of 2 to 10 MPa.
The hard rubber material is a heavy-loaded pneumatic radial tire having a bead portion reinforcement structure, characterized in that the volume modulus of 2 to 10 MPa.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020100061631A KR101141881B1 (en) | 2010-06-29 | 2010-06-29 | Pneumatic tire with excellent bead structure and method of manufacturing thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020100061631A KR101141881B1 (en) | 2010-06-29 | 2010-06-29 | Pneumatic tire with excellent bead structure and method of manufacturing thereof |
Publications (2)
Publication Number | Publication Date |
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KR20120001055A true KR20120001055A (en) | 2012-01-04 |
KR101141881B1 KR101141881B1 (en) | 2012-05-03 |
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Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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KR1020100061631A KR101141881B1 (en) | 2010-06-29 | 2010-06-29 | Pneumatic tire with excellent bead structure and method of manufacturing thereof |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101512634B1 (en) * | 2013-10-30 | 2015-04-16 | 금호타이어 주식회사 | Pneumatic tire with reinforced bead portion |
CN110194029A (en) * | 2019-06-26 | 2019-09-03 | 青岛双星轮胎工业有限公司 | Steel wire carcass HT tire and its manufacturing process |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6972061B1 (en) | 1999-12-06 | 2005-12-06 | The Goodyear Tire & Rubber Company | Compound apex for vehicle tire |
JP3116044B2 (en) * | 2000-02-14 | 2000-12-11 | 住友ゴム工業株式会社 | Pneumatic tires for heavy duty, light trucks |
JP4542177B2 (en) | 2008-07-04 | 2010-09-08 | 株式会社ブリヂストン | Heavy duty tire |
-
2010
- 2010-06-29 KR KR1020100061631A patent/KR101141881B1/en active IP Right Grant
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101512634B1 (en) * | 2013-10-30 | 2015-04-16 | 금호타이어 주식회사 | Pneumatic tire with reinforced bead portion |
CN110194029A (en) * | 2019-06-26 | 2019-09-03 | 青岛双星轮胎工业有限公司 | Steel wire carcass HT tire and its manufacturing process |
CN110194029B (en) * | 2019-06-26 | 2023-08-15 | 青岛双星轮胎工业有限公司 | Steel wire carcass HT tire and manufacturing process thereof |
Also Published As
Publication number | Publication date |
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KR101141881B1 (en) | 2012-05-03 |
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