JP2002067622A - Precure tread and reclaimed tire to which the precure tread attached - Google Patents
Precure tread and reclaimed tire to which the precure tread attachedInfo
- Publication number
- JP2002067622A JP2002067622A JP2000257292A JP2000257292A JP2002067622A JP 2002067622 A JP2002067622 A JP 2002067622A JP 2000257292 A JP2000257292 A JP 2000257292A JP 2000257292 A JP2000257292 A JP 2000257292A JP 2002067622 A JP2002067622 A JP 2002067622A
- Authority
- JP
- Japan
- Prior art keywords
- tread
- tire
- thickness
- groove
- precure tread
- 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
Links
Landscapes
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、プレキュアトレ
ッドおよび該プレキュアトレッドが貼付けられた更生タ
イヤに関する。The present invention relates to a pre-cured tread and a retreaded tire to which the pre-cured tread is attached.
【０００２】[0002]
【従来の技術】一般に、更生タイヤは以下のようにして
製造される。即ち、使用済みタイヤから残存トレッドゴ
ムをバフ掛けにより取り除いた後、使用済みタイヤのト
レッド部に未加硫ゴムからなる接着用クッションゴムを
配置して台タイヤとする。次に、プレキュアトレッドを
台タイヤのトレッド部に貼付けた後、該プレキュアトレ
ッドが接着された台タイヤを図示していない加硫装置に
搬入して加硫し、更生タイヤとする。2. Description of the Related Art Generally, a retreaded tire is manufactured as follows. That is, after removing the remaining tread rubber from the used tire by buffing, an adhesive cushion rubber made of unvulcanized rubber is arranged on the tread portion of the used tire to obtain a base tire. Next, after the pre-cure tread is attached to the tread portion of the base tire, the base tire to which the pre-cure tread is bonded is carried into a vulcanizing device (not shown) and vulcanized to obtain a retreaded tire.
【０００３】ここで、前記プレキュアトレッドの表面に
は、更生タイヤとなったとき主溝、ラグ溝等となる複数
本の溝が形成されているが、これら溝の最深部から裏面
までの厚さｔは、従来、貼付け時の取り扱いを容易とす
るため、3.0〜6.0mm程度（ 4.0mm程度が主流）となって
いた。[0003] Here, a plurality of grooves serving as main grooves, lug grooves, and the like when formed into a retreaded tire are formed on the surface of the precured tread. Conventionally, t is conventionally about 3.0 to 6.0 mm (about 4.0 mm is mainstream) in order to facilitate handling at the time of pasting.
【０００４】[0004]
【発明が解決しようとする課題】しかしながら、前述の
ように厚さｔが3.0〜6.0mm程度と比較的厚肉であると、
更生タイヤとなったときの溝の最深部からベルト層まで
の溝下ゴムゲージ（前記厚さｔにクッションゴムの肉厚
を加えた厚さ）がかなり厚くなり、この結果、走行時に
トレッド部が変形し難くなって発熱耐久性が低下してし
まうという問題点がある。However, as described above, when the thickness t is relatively thick, about 3.0 to 6.0 mm,
The rubber gauge under the groove from the deepest part of the groove to the belt layer (thickness obtained by adding the thickness t to the thickness of the cushion rubber) when the tire becomes a retread tire becomes considerably thick. As a result, the tread part is deformed during running. There is a problem that heat generation becomes difficult and heat generation durability is reduced.
【０００５】この発明は、更生タイヤの発熱耐久性を効
果的に向上させることができるプレキュアトレッドおよ
び該プレキュアトレッドが貼付けられた更生タイヤを提
供することを目的とする。An object of the present invention is to provide a precured tread which can effectively improve the heat generation durability of a retreaded tire and a retreaded tire to which the precured tread is attached.
【０００６】[0006]
【課題を解決するための手段】このような目的は、第１
に、表面に複数本の溝が形成されるとともに、裏面が台
タイヤに貼付けられる接着面となり、断面略台形状を呈
する加硫済みのプレキュアトレッドにおいて、前記溝の
最深部から裏面までの厚さｔを0.5〜2.5mmの範囲内とし
たプレキュアトレッドにより、SUMMARY OF THE INVENTION The purpose of the invention is as follows.
In addition, a plurality of grooves are formed on the front surface, the back surface is an adhesive surface to be attached to the base tire, and in a vulcanized precured tread having a substantially trapezoidal cross section, the thickness from the deepest part of the groove to the back surface By the pre-cure tread which made the length t within the range of 0.5 to 2.5 mm,
【０００７】第２に、台タイヤと、該台タイヤの半径方
向外側に貼付けられ、表面に複数本の溝が形成されると
ともに、裏面が台タイヤに貼付けられる接着面となる断
面略台形状の加硫済みプレキュアトレッドとを備え、前
記プレキュアトレッドにおける溝の最深部から裏面まで
の厚さｔを0.5〜2.5mmの範囲内とした更生タイヤにより
達成することができる。Secondly, the base tire has a substantially trapezoidal cross section which is affixed radially outward of the base tire, has a plurality of grooves formed on the surface, and has a back surface serving as an adhesive surface to be affixed to the base tire. And vulcanized precured tread, and can be achieved by a retreaded tire in which the thickness t from the deepest part to the back surface of the groove in the precured tread is in the range of 0.5 to 2.5 mm.
【０００８】そして、前述のように溝の最深部から裏面
までの厚さｔを 2.5mm以下とすれば、更生タイヤとなっ
たときの溝下ゴムゲージがかなり薄くなり、この結果、
走行時にトレッド部が変形し易くなって発熱耐久性が向
上する。但し、前記厚さｔが0.5mm未満であると、該プ
レキュアトレッドの裏面をバフ研磨したとき、破損する
ことがあるため、前記厚さｔは 0.5mm以上でなければな
らない。When the thickness t from the deepest part of the groove to the back surface is set to 2.5 mm or less as described above, the rubber gauge under the groove when the tire is retread becomes considerably thin.
The tread portion is easily deformed during running, and the heat generation durability is improved. However, if the thickness t is less than 0.5 mm, the back surface of the precured tread may be damaged when buffed, so that the thickness t must be 0.5 mm or more.
【０００９】また、請求項２に記載のように構成すれ
ば、破損を確実に防止しながら発熱耐久性を強力に向上
させることができる。Further, according to the structure described in claim 2, it is possible to strongly improve the heat generation durability while reliably preventing breakage.
【００１０】[0010]
【発明の実施の形態】以下、この発明の一実施形態を図
面に基づいて説明する。図１において、11は更生タイヤ
に用いられる帯状のプレキュアトレッドであり、このプ
レキュアトレッド11は加硫済みゴムから構成されてい
る。このプレキュアトレッド11は幅方向断面が略台形状
を呈しており、その表面14は幅狭で更生タイヤとなった
とき踏面となり、一方、その裏面15は幅広で台タイヤ12
の貼付け面13（半径方向外側面）に貼付けられる接着面
となる。DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described below with reference to the drawings. In FIG. 1, reference numeral 11 denotes a belt-shaped precured tread used for a retreaded tire, and the precured tread 11 is made of vulcanized rubber. This precured tread 11 has a substantially trapezoidal cross section in the width direction, and its front surface 14 is narrow and becomes a tread when it becomes a retread tire, while its back surface 15 is wide and its base tire 12
The adhesive surface is attached to the adhesive surface 13 (radially outer surface).
【００１１】そして、前記裏面15は台タイヤ12の貼付け
面13とほぼ同一の曲率半径で表面14に向かって凹んでお
り、その深さは幅方向中央に向かうに従い徐々に深くな
っている。また、前記プレキュアトレッド11の表面14に
は長手方向に延びる広幅の溝16が複数本形成され、これ
らの溝16は、更生タイヤとなったとき、周方向に延びる
主溝、副溝となる。The rear surface 15 is concave toward the front surface 14 with substantially the same radius of curvature as the attaching surface 13 of the base tire 12, and the depth gradually increases toward the center in the width direction. Further, a plurality of wide grooves 16 extending in the longitudinal direction are formed on the surface 14 of the precured tread 11, and these grooves 16 become a main groove and a sub-groove extending in the circumferential direction when a retreaded tire is obtained. .
【００１２】ここで、各溝16の最深部17から前記裏面15
までのゴム厚さ（スキッドベースゲージ）ｔを 2.5mm以
下としている。その理由は、前記厚さｔを 2.5mm以下と
すると、更生タイヤとなったときの溝下ゴムゲージｇ
（図３に示すように厚さｔにクッションゴム28の肉厚ｎ
を加えた厚さ）がかなり薄くなり、この結果、走行時に
トレッド部が変形し易くなって発熱が抑えられ、耐久性
が向上するからである。Here, the deepest portion 17 of each groove 16 is connected to the back surface 15
Rubber thickness (skid base gauge) t is set to 2.5 mm or less. The reason is that if the thickness t is 2.5 mm or less, the rubber gauge g under the groove when the tire becomes a retreaded tire is obtained.
(As shown in FIG. 3, the thickness t of the cushion rubber 28 is changed to the thickness t.
) Is considerably thinned, and as a result, the tread portion is easily deformed during running, heat generation is suppressed, and durability is improved.
【００１３】但し、前記厚さｔが 0.5mm未満となると、
該プレキュアトレッド11の裏面15を貼付けの前作業とし
てバフ研磨したときに、最深部17が破損することがある
ため、 0.5mm未満のものは用いることができない。この
ようなことから前記厚さｔは0.5〜2.5mmの範囲内でなけ
ればならない。However, when the thickness t is less than 0.5 mm,
When the back surface 15 of the pre-cured tread 11 is buffed as a pre-attachment operation, the deepest portion 17 may be damaged, so that the one with a diameter of less than 0.5 mm cannot be used. For this reason, the thickness t must be in the range of 0.5 to 2.5 mm.
【００１４】また、前記厚さｔは0.8〜1.5mmの範囲内と
することが好ましい。その理由は、厚さｔをこのような
範囲内とすると、バフ研磨時における破損を確実に防止
しながら発熱耐久性を強力に向上させることができるか
らである。Preferably, the thickness t is in the range of 0.8 to 1.5 mm. The reason is that when the thickness t is within such a range, the heat generation durability can be strongly improved while reliably preventing breakage during buffing.
【００１５】次に、前述のようなプレキュアトレッド11
を製造する場合には、幅方向断面が略台形状をした未加
硫ゴムからなるトレッド素材20を押出し機（図示せず）
から押し出した後、所定長に切断し、その後、切断され
た帯状のトレッド素材20を図２に示すような下金型21の
成型凹み22内に表面14が底面と接触するようにしてセッ
トする。ここで、前記成形凹み22の底面には長手方向に
延びる複数本の主骨23が形成され、これらの主骨23の高
さは従来のものより若干高い。Next, the pre-cured tread 11 as described above is used.
When manufacturing a tread material 20 made of unvulcanized rubber having a substantially trapezoidal cross section in the width direction, an extruder (not shown)
After being extruded from the mold, it is cut to a predetermined length, and then the cut strip-shaped tread material 20 is set in a molding recess 22 of a lower mold 21 as shown in FIG. . Here, a plurality of main bones 23 extending in the longitudinal direction are formed on the bottom surface of the molding recess 22, and the height of these main bones 23 is slightly higher than the conventional one.
【００１６】次に、下面に型付け面24を有する上金型25
を下金型21に当接するまで下降させる。これにより、加
硫金型26、即ち下、上金型21、25は閉止して内部に形成
されたキャビティ27にトレッド素材20が収納されるが、
このとき、前記型付け面24はトレッド素材20の裏面15に
接触する。Next, an upper mold 25 having a molding surface 24 on the lower surface.
Is lowered until it comes into contact with the lower mold 21. Thereby, the vulcanizing mold 26, that is, the lower, upper molds 21 and 25 are closed and the tread material 20 is stored in the cavity 27 formed therein,
At this time, the molding surface 24 contacts the back surface 15 of the tread material 20.
【００１７】その後、これらを図示していない加硫装置
に搬入して加硫を行い、トレッド素材20をプレキュアト
レッド11とする。このとき、主骨23がトレッド素材20の
表面14にくい込み、該表面14に長手方向に延びる複数本
の溝16を形成するが、これら主骨23の高さは前述のよう
に従来より若干高いので、形成された溝16は従来より深
くなり、この結果、前記厚さｔが0.5〜2.5mmの範囲内と
なる。After that, these are carried into a vulcanizing apparatus (not shown) and vulcanized, and the tread material 20 is made into a precured tread 11. At this time, the main bone 23 penetrates into the surface 14 of the tread material 20 and forms a plurality of grooves 16 extending in the longitudinal direction on the surface 14, but the height of these main bones 23 is slightly higher than before as described above. Therefore, the formed groove 16 becomes deeper than before, and as a result, the thickness t is in the range of 0.5 to 2.5 mm.
【００１８】次に、このようにして製造されたプレキュ
アトレッド11を用いて使用済みタイヤを更生する場合に
は、まず、該使用済みタイヤから残存トレッドゴムをバ
フ掛けにより取り除いた後、使用済みタイヤのトレッド
部に未加硫ゴムからなる接着用クッションゴム28を配置
して台タイヤ12とする。その後、図３に示すようにプレ
キュアトレッド11を台タイヤ12のトレッド部に貼付け、
裏面15を台タイヤ12の貼付け面13にクッションゴム28を
介して密着させる。次に、プレキュアトレッド11が接着
された台タイヤ12を図示していない加硫装置に搬入して
加硫し更生タイヤとする。Next, when a used tire is rehabilitated using the precured tread 11 manufactured in this manner, first, the remaining tread rubber is removed from the used tire by buffing, and then the used tire is rebuilt. An adhesive cushion rubber 28 made of unvulcanized rubber is arranged on the tread portion of the tire to make the base tire 12. Thereafter, as shown in FIG. 3, the pre-cured tread 11 is attached to the tread portion of the base tire 12,
The back surface 15 is brought into close contact with the attachment surface 13 of the base tire 12 via the cushion rubber 28. Next, the base tire 12 to which the precured tread 11 is adhered is carried into a vulcanizing device (not shown) and vulcanized to obtain a retreaded tire.
【００１９】なお、前述の実施形態においては、プレキ
ュアトレッド11の表面14に形成された溝16は周方向に延
びる主溝、副溝であったが、この発明においては、前記
溝は略軸方向に延びた主溝、副溝に交差する横溝であっ
てもよい。In the above-described embodiment, the grooves 16 formed on the surface 14 of the pre-cured tread 11 are the main groove and the sub-groove extending in the circumferential direction. It may be a horizontal groove that crosses the main groove and the sub groove extending in the direction.
【００２０】[0020]
【実施例】次に、試験例を説明する。この試験に当たっ
ては、厚さｔが 4.0mmである従来プレキュアトレッド
と、厚さｔが 1.0mmである供試プレキュアトレッドとを
準備した。次に、これら各プレキュアトレッドをタイヤ
サイズが11Ｒ22.5である台タイヤにそれぞれ接着した
後、加硫して従来更生タイヤおよび実施更生タイヤとし
た。Next, test examples will be described. In this test, a conventional precured tread having a thickness t of 4.0 mm and a test precured tread having a thickness t of 1.0 mm were prepared. Next, each of these precured treads was respectively bonded to a base tire having a tire size of 11R22.5, and then vulcanized to obtain a conventional retread tire and a practical retread tire.
【００２１】次に、前記各タイヤに 686ｋPaの内圧を充
填した後、27.2ｋＮの荷重を負荷しながらドラム上を65
km/hで溝底に故障が発生するまで走行させ、その走行距
離を求めた。その結果を、従来更生タイヤを指数 100で
表すと、実施更生タイヤでは104まで耐熱耐久性が向上
していた。Next, after each tire is filled with an internal pressure of 686 kPa, a 65.65 kN load is applied on the drum while applying a load of 27.2 kN.
The vehicle was driven at km / h until a failure occurred at the groove bottom, and the traveling distance was obtained. When the result is expressed as an index of 100 for a conventional retreaded tire, the heat resistance and durability of an actual retreaded tire have been improved to 104.
【００２２】[0022]
【発明の効果】以上説明したように、この発明によれ
ば、更生タイヤの発熱耐久性を効果的に向上させること
ができる。As described above, according to the present invention, the heat generation durability of a retreaded tire can be effectively improved.
【図１】この発明の一実施形態を示すプレキュアトレッ
ド、台タイヤの断面図である。FIG. 1 is a cross-sectional view of a pre-cured tread and a base tire according to an embodiment of the present invention.
【図２】製造工程を説明する正面断面図である。FIG. 2 is a front sectional view illustrating a manufacturing process.
【図３】台タイヤにプレキュアトレッドを貼付けた状態
を説明する子午線断面図である。FIG. 3 is a meridional sectional view illustrating a state in which a precured tread is attached to a base tire.
11…プレキュアトレッド 12…台タイヤ 14…表面 15…裏面 16…溝 17…最深部 11 ... Precured tread 12 ... Base tire 14 ... Front 15 ... Back 16 ... Groove 17 ... Deepest
Claims (3)
裏面が台タイヤに貼付けられる接着面となり、断面略台
形状を呈する加硫済みのプレキュアトレッドにおいて、
前記溝の最深部から裏面までの厚さｔを0.5〜2.5mmの範
囲内としたことを特徴とするプレキュアトレッド。1. A plurality of grooves are formed on a surface,
In the vulcanized pre-cured tread whose back surface becomes the adhesive surface to be attached to the base tire and has a substantially trapezoidal cross section,
A precured tread, wherein the thickness t from the deepest part of the groove to the back surface is in the range of 0.5 to 2.5 mm.
求項１記載のプレキュアトレッド。2. The precured tread according to claim 1, wherein said thickness t is in the range of 0.8 to 1.5 mm.
貼付けられ、表面に複数本の溝が形成されるとともに、
裏面が台タイヤに貼付けられる接着面となる断面略台形
状の加硫済みプレキュアトレッドとを備え、前記プレキ
ュアトレッドにおける溝の最深部から裏面までの厚さｔ
を0.5〜2.5mmの範囲内としたことを特徴とするプレキュ
アトレッドが貼付けられた更生タイヤ。3. A base tire and a plurality of grooves are formed on a surface of the base tire, the plurality of grooves being formed on a surface of the base tire.
A vulcanized precured tread having a substantially trapezoidal cross-section, the back surface of which is an adhesive surface to be affixed to the base tire;
Retreaded tire having a pre-cured tread affixed thereon, having a range of 0.5 to 2.5 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000257292A JP2002067622A (en) | 2000-08-28 | 2000-08-28 | Precure tread and reclaimed tire to which the precure tread attached |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000257292A JP2002067622A (en) | 2000-08-28 | 2000-08-28 | Precure tread and reclaimed tire to which the precure tread attached |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002067622A true JP2002067622A (en) | 2002-03-08 |
Family
ID=18745774
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000257292A Pending JP2002067622A (en) | 2000-08-28 | 2000-08-28 | Precure tread and reclaimed tire to which the precure tread attached |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002067622A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013148355A1 (en) | 2012-03-30 | 2013-10-03 | Compagnie Generale Des Etablissements Michelin | Tire treads with reduced undertread thickness |
| US20140008005A1 (en) * | 2012-07-09 | 2014-01-09 | Bridgestone Americas Tire Operations, Llc | Envelope And Method For Retreading Tires |
| US10336026B2 (en) * | 2013-09-27 | 2019-07-02 | Compagnie Generale Des Etablissements Michelin | Use of vacuum to increase effective skid depth of pre-cured tread |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60186208U (en) * | 1984-05-22 | 1985-12-10 | 東洋ゴム工業株式会社 | Precure Your Atretsudo |
| JPS61238502A (en) * | 1985-04-15 | 1986-10-23 | Bridgestone Corp | Tread used for recap |
-
2000
- 2000-08-28 JP JP2000257292A patent/JP2002067622A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60186208U (en) * | 1984-05-22 | 1985-12-10 | 東洋ゴム工業株式会社 | Precure Your Atretsudo |
| JPS61238502A (en) * | 1985-04-15 | 1986-10-23 | Bridgestone Corp | Tread used for recap |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013148355A1 (en) | 2012-03-30 | 2013-10-03 | Compagnie Generale Des Etablissements Michelin | Tire treads with reduced undertread thickness |
| CN104169105A (en) * | 2012-03-30 | 2014-11-26 | 米其林研究和技术股份有限公司 | Tire treads with reduced undertread thickness |
| US20150083306A1 (en) * | 2012-03-30 | 2015-03-26 | Michelin Recherche Et Technique S.A. | Tire treads with reduced undertread thickness |
| US20150328936A1 (en) * | 2012-03-30 | 2015-11-19 | Michelin Recherche Et Technique S.A. | Tire treads with reduced undertread thickness |
| EP2830892A4 (en) * | 2012-03-30 | 2016-05-11 | Michelin & Cie | Tire treads with reduced undertread thickness |
| US20140008005A1 (en) * | 2012-07-09 | 2014-01-09 | Bridgestone Americas Tire Operations, Llc | Envelope And Method For Retreading Tires |
| US10336026B2 (en) * | 2013-09-27 | 2019-07-02 | Compagnie Generale Des Etablissements Michelin | Use of vacuum to increase effective skid depth of pre-cured tread |
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