JPH0866923A - Mold for vulcanizing tire, and pneumatic tire - Google Patents

Mold for vulcanizing tire, and pneumatic tire

Info

Publication number
JPH0866923A
JPH0866923A JP6204062A JP20406294A JPH0866923A JP H0866923 A JPH0866923 A JP H0866923A JP 6204062 A JP6204062 A JP 6204062A JP 20406294 A JP20406294 A JP 20406294A JP H0866923 A JPH0866923 A JP H0866923A
Authority
JP
Japan
Prior art keywords
tire
sipe
metal plate
thin metal
flask
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP6204062A
Other languages
Japanese (ja)
Inventor
Misao Kawabata
操 川端
Kazuo Hayashi
一夫 林
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Bridgestone Corp
Original Assignee
Bridgestone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Bridgestone Corp filed Critical Bridgestone Corp
Priority to JP6204062A priority Critical patent/JPH0866923A/en
Publication of JPH0866923A publication Critical patent/JPH0866923A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B60VEHICLES IN GENERAL
    • B60CVEHICLE TYRES; TYRE INFLATION; TYRE CHANGING; CONNECTING VALVES TO INFLATABLE ELASTIC BODIES IN GENERAL; DEVICES OR ARRANGEMENTS RELATED TO TYRES
    • B60C11/00Tyre tread bands; Tread patterns; Anti-skid inserts
    • B60C11/03Tread patterns
    • B60C11/12Tread patterns characterised by the use of narrow slits or incisions, e.g. sipes
    • B60C11/1272Width of the sipe
    • B60C11/1281Width of the sipe different within the same sipe, i.e. enlarged width portion at sipe bottom or along its length

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tires In General (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)

Abstract

PURPOSE: To obtain flask-like sipes, each of which has curved or bent portion on the tread of a tire without posing problems such as an increase in cost, lowering of quality and the like by a method wherein each metal blade is formed by welding a cylindrical pin to the end part of a thin metal plate, the planted portion of which is curved or bent along a molding surface and the end part of which is straight. CONSTITUTION: Each metal blade 1 is positioned between two groove-forming skeletons adjacent to each other on a molding surface 12 so as to form a flask- like sipe on the tread of a tire. The metal blade 1 consists of thin metal plate 2 and pin 3, which is welded to the end part 2a of the thin metal plate 2 under the state being fitted in a groove formed in it self. The portion, in which the thin metal plate is planted, is curved or bent along a molding surface 12, while the end part 2a of the thin metal plate is substantially straight. In the pin 3, a groove 4 having the breadth slightly wider than the thickness of the thin metal plate 2 is worked along and parallel to its axis line. Both the ends of the groove reach-to both the ends of the pin 3. Thus, the welding work between the pin 3 and the thin metal plate 2 becomes easy.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、タイヤのトレッドにフ
ラスコ形サイプを形成するための金属製ブレードを成型
面に植設したタイヤ加硫用金型と、トレッドにフラスコ
形サイプを配置した空気入りタイヤに関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a tire vulcanizing mold in which a metal blade for forming a flask-shaped sipe is planted on a molding surface of a tire tread, and an air having a flask-shaped sipe arranged in the tread. Containing tires.

【0002】[0002]

【従来の技術】従来より、ウェット路での操縦性等を目
的として、タイヤのトレッドに複数のサイプを設ける技
術が知られている。このようなサイプの種類として、サ
イプ底の亀裂発生防止を目的とした断面がフラスコ形状
のいわゆるフラスコ形サイプがある。ウェット路での操
縦性を向上させるためにも、前記フラスコ形サイプは好
ましく、そしてサイプの形状を湾曲または屈曲させるこ
とにより路面に対するエッヂを多くすることが、さらに
好ましい。
2. Description of the Related Art Conventionally, there is known a technique of providing a plurality of sipes on a tread of a tire for the purpose of maneuverability on a wet road. As such a type of sipe, there is a so-called flask type sipe having a flask-shaped cross section for the purpose of preventing crack generation at the bottom of the sipe. The flask-shaped sipes are also preferable in order to improve the maneuverability on wet roads, and it is more preferable that the edge of the road surface is increased by bending or bending the shape of the sipes.

【0003】[0003]

【発明が解決しようとする課題】湾曲・屈曲したフラス
コ形サイプを形成する場合、タイヤ加硫用金型の金属製
ブレードを湾曲・屈曲しなければならない。その方法と
して、まず、特開平4−215507号公報に示されて
いるように、金属製薄板を二つ折りにして金属製ピン軸
を挟み込んでおいて、ブレードを湾曲・屈曲させる方法
があるが、この方法ではコスト増を招いてしまうので好
ましくない。そこで、前記金属製ピン軸をなくして、金
属製薄板を二つ折りにする際に折り曲げ部分に空間部を
形成する方法が考えられるが、この方法ではブレードを
湾曲・屈曲させる際に、該空間部が潰れてしまう虞があ
って、高品質のフラスコ形サイプを形成することができ
ない。
When forming a curved and bent flask-shaped sipe, the metal blade of the tire vulcanizing mold must be curved and bent. As a method, first, as disclosed in Japanese Patent Laid-Open No. 4-215507, there is a method of bending a metal thin plate in two and sandwiching a metal pin shaft to bend and bend the blade. This method is not preferable because it causes an increase in cost. Therefore, a method of eliminating the metal pin shaft and forming a space portion in the bent portion when folding the metal thin plate in two can be considered, but in this method, when the blade is bent or bent, the space portion is formed. There is a risk of crushing, and high quality flask-shaped sipes cannot be formed.

【0004】これらを考慮すると、金属薄板に円柱状の
ピンを溶接してブレード全体を所望の程度に湾曲・屈曲
する方法が好ましいと考えられる。しかし、溶接後の湾
曲等は困難で、金属薄板とピンとの間での溶接割れの虞
もある。そこで金属薄板とピンとを別々に湾曲・屈曲さ
せて、後にこれを溶接する方法も考えることができる
が、その作業は困難となってしまう。
Considering these points, it is considered preferable to weld a cylindrical pin to a thin metal plate to bend or bend the entire blade to a desired degree. However, bending after welding is difficult, and there is a risk of weld cracking between the thin metal plate and the pin. Therefore, a method of separately bending and bending the metal thin plate and the pin and then welding them together can be considered, but the work becomes difficult.

【0005】本発明は上記事情に鑑みてなされたもの
で、タイヤのトレッドに湾曲または屈曲部分を有するフ
ラスコ形サイプを、コスト増やサイプの品質低下等の問
題を招かずに得ることのできるタイヤ加硫用金型と、前
記フラスコ形サイプを配置した空気入りタイヤの提供を
目的とする。
The present invention has been made in view of the above circumstances, and a tire in which a flask-shaped sipe having a curved or bent portion in a tread of a tire can be obtained without causing problems such as an increase in cost and deterioration in quality of sipe. An object of the present invention is to provide a pneumatic tire in which a vulcanization mold and the flask-shaped sipe are arranged.

【0006】[0006]

【課題を解決するための手段】そこで本発明の第1発明
は、タイヤのトレッドにフラスコ形サイプを形成するた
めの金属製ブレードを成型面に植設したタイヤ加硫用金
型において、前記金属製ブレードは、金属薄板が前記植
設部分では成型面に沿って湾曲または屈曲しているのに
対して、端部では実質直線状となっており、この端部に
円柱状のピンを溶接してなることを特徴とするタイヤ加
硫用金型である。また第2発明は、トレッドにフラスコ
形サイプを配置した空気入りタイヤにおいて、前記サイ
プがトレッド表面では該表面に沿って湾曲または屈曲し
ているのに対して、サイプ底部分では実質直線状となっ
ている空気入りタイヤである。
Therefore, a first invention of the present invention relates to a tire vulcanizing mold in which a metal blade for forming a flask-shaped sipe is planted on a molding surface on a tread of a tire. The blade made of the thin metal plate is curved or bent along the molding surface in the planted portion, while it is substantially straight at the end, and a cylindrical pin is welded to this end. It is a mold for tire vulcanization characterized by the following. A second invention is a pneumatic tire in which a flask-shaped sipe is arranged on a tread, whereas the sipe is curved or bent along the surface of the tread, whereas the sipe is substantially straight at the bottom of the sipe. It is a pneumatic tire.

【0007】[0007]

【作用】本発明の第1発明のタイヤ加硫用金型は、成型
面への植設付近では金属薄板が湾曲・屈曲しているもの
の、ピンを溶接する端部では実質直線状となっており、
その溶接作業は容易となる。また、考察したようなコス
ト増やサイプの品質低下を招く虞もない。
In the mold for tire vulcanization of the first invention of the present invention, the thin metal plate is curved and bent near the implantation on the molding surface, but is substantially straight at the end where the pins are welded. Cage,
The welding work becomes easy. In addition, there is no possibility that the cost will increase and the quality of the sipes will deteriorate as discussed above.

【0008】本発明の第2発明の空気入りタイヤは、ト
レッド表面に湾曲・屈曲したサイプを有しているので路
面へのエッヂが増え、ウェット路の操縦性が向上する。
また摩耗末期においては、サイプ底のフラスコ部分によ
って排水性低下が食い止められ、新品時から摩耗末期ま
で高いウェット路操縦性を得ることができる。
Since the pneumatic tire of the second aspect of the present invention has curved and bent sipes on the tread surface, the edge on the road surface is increased and the maneuverability on wet roads is improved.
In addition, at the end of wear, the flask portion at the bottom of the sipe prevents the drainage property from decreasing, and it is possible to obtain high wet road maneuverability from the time of new product to the end of wear.

【0009】[0009]

【実施例】以下、本発明の実施例を図面を参照しながら
説明する。図1において、符号10は本発明に係るタイヤ
加硫用金型、符号 1はタイヤ加硫用金型10の成型面12に
植設された状態のフラスコ形サイプ形成用の金属製ブレ
ードを示している。この金属製ブレード 1は、成型面12
の隣接する2つの溝形成骨の間に位置し、タイヤのトレ
ッドにフラスコ形サイプを形成するようになっている。
Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 10 indicates a tire vulcanizing mold according to the present invention, and reference numeral 1 indicates a flask-shaped sipe forming metal blade that is implanted in a molding surface 12 of the tire vulcanizing mold 10. ing. This metal blade 1 has a molding surface 12
Located between two adjacent groove forming bones of the tire to form a flask-shaped sipe in the tread of the tire.

【0010】この金属製ブレード 1は、図1に示すよう
に、板厚が0.2〜1.0mm程度のステンレス、チタ
ニウム等の金属薄板 2と、金属薄板 2の端部2aに、自身
の溝4を嵌合させて溶接されたピン 3とから構成されて
いる。図1は金属製ブレード 1中央部における厚み方向
断面図を示している。ここに金属薄板 2が曲がっている
様子が示されているが、これは、金属薄板 2が植設部分
2bでは成型面12に沿って湾曲または屈曲しているのに対
して、端部2aでは実質直線状となっているためである。
As shown in FIG. 1, the metal blade 1 has a metal thin plate 2 made of stainless steel, titanium or the like having a plate thickness of about 0.2 to 1.0 mm, and an end portion 2a of the metal thin plate 2 with its own blade. It is composed of a pin 3 welded by fitting a groove 4 into it. FIG. 1 shows a sectional view in the thickness direction at the central portion of the metal blade 1. It is shown here that the thin metal plate 2 is bent.
This is because 2b is curved or bent along the molding surface 12, while the end portion 2a is substantially straight.

【0011】ピン 3にはその軸線に沿って軸線と平行に
金属薄板 2の板厚よりも僅かに幅広の溝 4が加工され、
溝 4の両端はピン 3の両端に達している。このピン 3の
溝 4と金属薄板 2の端部2aとは互いに嵌合し、金属薄板
2の厚み方向に直交する中心線はピン 3の軸心を通って
いる。ピン 3と金属薄板 2とは周知の方法で溶接される
が、ピンを溶接する端部2aでは実質直線状となっている
ので、その溶接作業は容易となり、また、すでに考察し
たようなコスト増やサイプの品質低下を招く虞もない。
A groove 4 slightly wider than the plate thickness of the thin metal plate 2 is formed on the pin 3 along its axis parallel to the axis,
Both ends of the groove 4 reach both ends of the pin 3. The groove 4 of this pin 3 and the end 2a of the thin metal plate 2 are fitted together,
The center line orthogonal to the thickness direction of 2 passes through the axis of pin 3. The pin 3 and the thin metal plate 2 are welded by a well-known method, but since the end portion 2a where the pin is welded is substantially straight, the welding work is facilitated and the cost increase as already discussed has been achieved. There is also no risk of the quality of the sipe decreasing.

【0012】また金属薄板 2のピン 3よりも遠い位置で
あって、タイヤ加硫用金型30の成型面31の植設部分2b
に、該金属薄板 2をタイヤ加硫用金型側に固着するのに
利用する比較的大径の大孔 5が1個以上厚み方向に貫通
している。
Further, at a position farther from the pin 3 of the metal thin plate 2 and at the planting portion 2b of the molding surface 31 of the tire vulcanizing mold 30.
In addition, at least one large hole 5 having a relatively large diameter used for fixing the thin metal plate 2 to the tire vulcanizing mold side penetrates in the thickness direction.

【0013】図1に示された金属製ブレード 1を成型面
12に植設したタイヤ加硫用金型10を用いて得られたトレ
ッドパターンの展開図を図2に示している。符号20が空
気入りタイヤ、22が周溝、24が横溝、26がフラスコ形サ
イプ、28が通常のサイプを示している。横溝24、フラス
コ形サイプ26、サイプ28は全体として矢筈状になってお
り、当該トレッドパターンはいわゆる方向性パターンを
示している。
The metal blade 1 shown in FIG.
FIG. 2 shows a development view of the tread pattern obtained by using the tire vulcanizing mold 10 implanted in 12. Reference numeral 20 is a pneumatic tire, 22 is a circumferential groove, 24 is a lateral groove, 26 is a flask type sipe, and 28 is a normal sipe. The lateral groove 24, the flask-shaped sipe 26, and the sipe 28 are in the shape of an arrow as a whole, and the tread pattern shows a so-called directional pattern.

【0014】図3は、フラスコ形サイプ26のみを拡大し
た透視図を示している。該フラスコ形サイプはトレッド
表面では該表面に沿って湾曲している(26a )のに対し
て、サイプ底部分では実質直線状となっている(26b
)。このようにフラスコ形サイプはトレッド表面で湾
曲していても、または屈曲していてもよく、種々の態様
が考えられる。
FIG. 3 shows an enlarged perspective view of only the flask-shaped sipe 26. The flask-shaped sipe is curved along the surface of the tread (26a), while the bottom of the sipe is substantially straight (26b).
). Thus, the flask-shaped sipes may be curved or bent on the tread surface, and various modes are possible.

【0015】[0015]

【発明の効果】本発明の第1発明のタイヤ加硫用金型に
よれば、タイヤのトレッドに湾曲または屈曲部分を有す
るフラスコ形サイプを、コスト増やサイプの品質低下等
の問題を招かずに得ることのできる。
According to the tire vulcanizing mold of the first invention of the present invention, the flask-shaped sipe having the curved or bent portion on the tread of the tire does not cause problems such as an increase in cost and deterioration of sipe quality. Can be obtained.

【0016】次に、本発明の第2発明の空気入りタイヤ
のウェット路操縦性に関する試験とその結果を以下に示
す。この試験に用いるタイヤサイズは235/45ZR
17であり、タイヤ内部の補強構造は周知の構造を用い
ているので記載を省略する。トレッドパターンについて
は、図2に示したパターンを有する空気入りタイヤを実
施例とし、図4に示したパターンを有するタイヤを従来
例とする。ここで、従来例のパターンと実施例のパター
ンとの相違点を述べる。実施例の場合、周溝22のうち、
タイヤ赤道面M近傍において延びる周溝22a とそのタイ
ヤ幅方向外側に延びる周溝22b に挟まれたリブ30を横切
るサイプが本発明によるフラスコ形サイプ26となってい
るのに対して、比較例の場合、リブ30を横切るサイプが
フラスコ形でない通常の断面形状になるサイプであっ
て、しかもトレッド表面においても直線状に延びてい
る。尚、それぞれサイプ深さは6.5mm、トレッド表
面でのサイプ幅は0.7mmであった。フラスコ形サイ
プ26の場合、サイプ底近傍の最も広幅部分で1.5mm
とした。
Next, a test on wet road maneuverability of the pneumatic tire of the second invention of the present invention and the results thereof will be shown below. The tire size used in this test is 235 / 45ZR
No. 17, and since the reinforcing structure inside the tire uses a known structure, the description thereof is omitted. Regarding the tread pattern, a pneumatic tire having the pattern shown in FIG. 2 is used as an example, and a tire having the pattern shown in FIG. 4 is used as a conventional example. Here, the difference between the pattern of the conventional example and the pattern of the embodiment will be described. In the case of the embodiment, of the circumferential groove 22,
The sipe that crosses the rib 30 sandwiched between the circumferential groove 22a extending in the vicinity of the tire equatorial plane M and the circumferential groove 22b extending outward in the tire width direction is the flask-type sipe 26 according to the present invention. In this case, the sipe that crosses the rib 30 is a sipe having a normal cross-sectional shape that is not a flask shape, and also extends linearly on the tread surface. The sipe depth was 6.5 mm and the sipe width on the tread surface was 0.7 mm. In case of flask type sipe 26, 1.5mm at the widest part near the bottom of sipe
And

【0017】これら供試例を、まず、新品時におけるウ
ェット路操縦性の試験として、リム組み後に内圧:2.
3kgf/cm2 を充填して、実車装着し、半径50mのウェ
ットスキッドパッド上を走行可能限界速度で走行させ
て、横方向加速度を測定した。この結果、従来例を10
0とする指数表示で、実施例は103であった(指数は
大きいほど良い)。
These test examples were first tested as a test of wet road maneuverability at the time of a new article.
It was filled with 3 kgf / cm 2 , mounted on an actual vehicle, and run on a wet skid pad with a radius of 50 m at a running limit speed to measure lateral acceleration. As a result, the conventional example 10
The index display was set to 0, and 103 was obtained in the example (the larger the index, the better).

【0018】次に、摩耗末期におけるウェット路操縦性
の試験として、トレッドを5mm摩耗させた後に、リム
組み後に内圧を充填して実車装着し、水深10mmの滞
水路を直進させて、ハイドロプレーニング現象が発生す
る速度を測定したところ、従来例を100とする指数表
示で、実施例は104であった(指数は大きいほど良
い)。
Next, as a test of wet road maneuverability at the end stage of wear, after the tread was worn for 5 mm, the internal pressure was filled after the rim was assembled and mounted on an actual vehicle, and a water path with a water depth of 10 mm was run straight to carry out the hydroplaning phenomenon. When the speed at which the occurrence of is generated was measured, it was an index display with the conventional example being 100, and was 104 in the example (the larger the index, the better).

【0019】以上のように、本発明による空気入りタイ
ヤは、新品時から摩耗末期まで高いウェット路操縦性を
得ることができる。
As described above, the pneumatic tire according to the present invention can obtain high wet road maneuverability from the time of new product to the end of wear.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明に従うタイヤ加硫用金型に植設された金
属製ブレードの断面図である。
FIG. 1 is a cross-sectional view of a metal blade embedded in a tire vulcanizing mold according to the present invention.

【図2】本発明に従うタイヤのトレッドパターン展開図
である。
FIG. 2 is a development view of a tread pattern of a tire according to the present invention.

【図3】図2におけるフラスコ形サイプ26の拡大透視図
である。
3 is an enlarged perspective view of the flask-shaped sipe 26 in FIG. 2. FIG.

【図4】従来例のトレッドパターン展開図である。FIG. 4 is a development view of a tread pattern of a conventional example.

【符号の説明】[Explanation of symbols]

1 金属製ブレード 2 金属薄板 3 ピン 10 タイヤ加硫用金型 11 成型面 20 空気入りタイヤ 26 フラスコ形サイプ 1 Metal blade 2 Thin metal plate 3 Pin 10 Tire vulcanizing mold 11 Molding surface 20 Pneumatic tire 26 Flask type sipe

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 FI 技術表示箇所 // B29K 21:00 105:24 B29L 30:00 ─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. 6 Identification number Office reference number FI technical display location // B29K 21:00 105: 24 B29L 30:00

Claims (2)

【特許請求の範囲】[Claims] 【請求項1】 タイヤのトレッドにフラスコ形サイプを
形成するための金属製ブレードを成型面に植設したタイ
ヤ加硫用金型において、前記金属製ブレードは、金属薄
板が前記植設部分では成型面に沿って湾曲または屈曲し
ているのに対して、端部では実質直線状となっており、
この端部に円柱状のピンを溶接してなることを特徴とす
るタイヤ加硫用金型。
1. A tire vulcanizing mold in which a metal blade for forming a flask-shaped sipe is planted on a molding surface of a tire tread, wherein the metal blade is formed by molding a thin metal plate at the planting portion. While curved or bent along the surface, it is substantially straight at the end,
A mold for tire vulcanization, characterized in that a cylindrical pin is welded to this end portion.
【請求項2】 トレッドにフラスコ形サイプを配置した
空気入りタイヤにおいて、前記サイプがトレッド表面で
は該表面に沿って湾曲または屈曲しているのに対して、
サイプ底部分では実質直線状となっている空気入りタイ
ヤ。
2. A pneumatic tire having a flask-shaped sipe arranged on a tread, wherein the sipe is curved or bent along the surface of the tread,
A pneumatic tire with a straight line at the bottom of the sipe.
JP6204062A 1994-08-30 1994-08-30 Mold for vulcanizing tire, and pneumatic tire Pending JPH0866923A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP6204062A JPH0866923A (en) 1994-08-30 1994-08-30 Mold for vulcanizing tire, and pneumatic tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP6204062A JPH0866923A (en) 1994-08-30 1994-08-30 Mold for vulcanizing tire, and pneumatic tire

Publications (1)

Publication Number Publication Date
JPH0866923A true JPH0866923A (en) 1996-03-12

Family

ID=16484131

Family Applications (1)

Application Number Title Priority Date Filing Date
JP6204062A Pending JPH0866923A (en) 1994-08-30 1994-08-30 Mold for vulcanizing tire, and pneumatic tire

Country Status (1)

Country Link
JP (1) JPH0866923A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7350552B2 (en) * 2001-01-10 2008-04-01 Michelin Recherche Et Technique S.A. Directional tread having incisions of varying inclination
JP2008155634A (en) * 2006-12-21 2008-07-10 Goodyear Tire & Rubber Co:The Flexible molding device for molding sunk groove, sunk blade, and large keyhole sipe in tire tread
JP2010513117A (en) * 2006-12-21 2010-04-30 ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ Vehicle wheel tire with improved tread pattern
WO2014030476A1 (en) * 2012-08-20 2014-02-27 横浜ゴム株式会社 Pneumatic tire

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US7350552B2 (en) * 2001-01-10 2008-04-01 Michelin Recherche Et Technique S.A. Directional tread having incisions of varying inclination
JP2008155634A (en) * 2006-12-21 2008-07-10 Goodyear Tire & Rubber Co:The Flexible molding device for molding sunk groove, sunk blade, and large keyhole sipe in tire tread
JP2010513117A (en) * 2006-12-21 2010-04-30 ピレリ・タイヤ・ソチエタ・ペル・アツィオーニ Vehicle wheel tire with improved tread pattern
WO2014030476A1 (en) * 2012-08-20 2014-02-27 横浜ゴム株式会社 Pneumatic tire
CN104395108A (en) * 2012-08-20 2015-03-04 横滨橡胶株式会社 Pneumatic tire
US9302550B2 (en) 2012-08-20 2016-04-05 The Yokohama Rubber Co., Ltd. Pneumatic tire
CN104395108B (en) * 2012-08-20 2016-05-04 横滨橡胶株式会社 Pneumatic tire

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