JP2010173614A - Precure tread and retreaded tire using the same - Google Patents

Precure tread and retreaded tire using the same Download PDF

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JP2010173614A
JP2010173614A JP2009021740A JP2009021740A JP2010173614A JP 2010173614 A JP2010173614 A JP 2010173614A JP 2009021740 A JP2009021740 A JP 2009021740A JP 2009021740 A JP2009021740 A JP 2009021740A JP 2010173614 A JP2010173614 A JP 2010173614A
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precure
tread
precure tread
groove
tire
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JP5245877B2 (en
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Satoru Kawamata
哲 川又
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a precure tread and a retreated tire using its precure tread, without reducing durability of the retreated tire manufactured by a precure system. <P>SOLUTION: This precure tread forms a recessed part 7 on an inner surface 6 corresponding to a groove part 3 of the precure tread 1. The depth of the recessed part 7 is set to 0.05-0.15 time of the depth of the groove part 3, and a width of the recessed part is set to 0.8-1.2 times of a groove width in a 50% depth position of the groove part. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明はプレキュアトレッド及びそのプレキュアトレッドを用いた更生タイヤに関し、更に詳しくはプレキュア方式で製造する更生タイヤの耐久性が低下しないようにしたプレキュアトレッド及びそれを用いた更生タイヤに関する。   TECHNICAL FIELD The present invention relates to a precure tread and a retread tire using the precure tread, and more particularly to a precure tread and a retread tire using the precure tread in which durability of a retread tire manufactured by a precure method is not lowered.

従来よりトラック，バス等の重荷重用空気入りタイヤにおいては、トレッドが摩耗して寿命に達すると、そのトレッド面を切削、バフ掛けしたタイヤ本体を台タイヤとして、新しいトレッドを貼り付けることにより更生タイヤとして再使用することが行われている。   Conventionally, in heavy-duty pneumatic tires for trucks, buses, etc., when the tread wears out and reaches the end of its life, the tire body with the tread surface cut and buffed is used as the base tire, and a new tread is attached to the tire. Can be reused as.

この更生タイヤの製造方法の１つに、特許文献１に示すようなプレキュア方式（コールド方式）がある。このプレキュア法は、加硫ゴムの表面にパターンを形成したプレキュアトレッドを未加硫ゴムからなる接着層を介して外周面に圧着した台タイヤを、薄い袋状のゴムからなるエンベロープ内で脱気（真空引き）しつつ加熱することで、プレキュアトレッドと台タイヤとを加硫接着するものであり、均質な更生タイヤを小規模な設備で製造できるという利点を有する。   One of the methods for producing this retread tire is a precure method (cold method) as shown in Patent Document 1. In this precure method, a base tire in which a precure tread having a pattern formed on the surface of a vulcanized rubber is pressure-bonded to the outer peripheral surface through an adhesive layer made of unvulcanized rubber is removed in an envelope made of a thin bag-like rubber. By heating while being evacuated (evacuated), the precure tread and the base tire are vulcanized and bonded, and there is an advantage that a homogeneous retread tire can be manufactured with a small-scale facility.

しかし、上記のプレキュア方式においては、図５に示すようにプレキュアトレッド１１を接着層８を介して貼り付けた台タイヤ４を封入したエンベロープ８（図５（ａ））内を真空引きすると、エンベロープ８がプレキュアトレッド１１のパターンの溝部３に入り込んで溝底９を押し拡げるように作用するため、その溝部３位置に対応する接着層５が薄肉化し（図５（ｂ））、プレキュアトレッド１１と台タイヤ４との間の接着力が局所的に弱くなってしまい、更生タイヤの耐久性を低下させる可能性がある。   However, in the above precure method, as shown in FIG. 5, when the inside of the envelope 8 (FIG. 5 (a)) enclosing the base tire 4 to which the precure tread 11 is bonded via the adhesive layer 8 is evacuated, Since the envelope 8 acts so as to enter the groove portion 3 of the pattern of the precure tread 11 and push the groove bottom 9 apart, the adhesive layer 5 corresponding to the position of the groove portion 3 is thinned (FIG. 5B), and the precure There is a possibility that the adhesive force between the tread 11 and the base tire 4 is locally weakened and the durability of the retread tire is lowered.

特開平９−７０９０３号公報JP-A-9-70903

本発明の目的は、プレキュア方式で製造された更生タイヤの耐久性を低下させることがないプレキュアトレッド及びそのプレキュアトレッドを用いた更生タイヤを提供することにある。   An object of the present invention is to provide a precure tread and a retread tire using the precure tread that do not deteriorate the durability of the retread tire manufactured by the precure method.

上記の目的を達成する本発明のプレキュアトレッドは、台タイヤのトレッド部に接着層を介して圧着されるプレキュアトレッドにおいて、前記プレキュアトレッドの外面に形成された溝部に対応する内面に凹部を形成したことを特徴とするものである。   The precure tread of the present invention that achieves the above object is a precure tread that is pressure-bonded to a tread portion of a base tire via an adhesive layer, and has a concave portion on an inner surface corresponding to a groove portion formed on the outer surface of the precure tread. Is formed.

凹部の深さを溝部の深さの０．０５〜０．１５倍とし、かつ凹部の幅を溝部の幅の５０％深さ位置における溝幅の０．８〜１．２倍とすることが望ましい。更に、凹部と溝部とを連通するスリットを形成するのがよい。   The depth of the recess is 0.05 to 0.15 times the depth of the groove, and the width of the recess is 0.8 to 1.2 times the groove width at the 50% depth position of the width of the groove. desirable. Furthermore, it is preferable to form a slit that communicates the recess and the groove.

本発明のプレキュアトレッドは、プレキュア方式による更生タイヤの製造に好ましく用いられる。   The precure tread of the present invention is preferably used for the production of retreaded tires by the precure method.

本発明のプレキュアトレッドによれば、プレキュアトレッドの外面の溝部に対応する内面に凹部を形成したので、プレキュア方式の製造方法においてエンベロープが溝部内に入り込んで溝底を押し拡げるように作用しても、凹部が潰れることによりプレキュアトレッドの変形を吸収するので、接着層が薄肉化しないため、プレキュア方式で製造された更生タイヤの耐久性が低下することはない。   According to the precure tread of the present invention, since the concave portion is formed on the inner surface corresponding to the groove portion on the outer surface of the precure tread, in the precure manufacturing method, the envelope enters the groove portion and acts to expand the groove bottom. However, since the deformation of the precure tread is absorbed by the crushing of the recess, the adhesive layer is not thinned, so that the durability of the retread tire manufactured by the precure method is not lowered.

本発明の実施形態からなるプレキュアトレッドを用いた更生タイヤのタイヤ子午線半断面図である。It is a tire meridian half section view of a retreaded tire using precure tread which consists of an embodiment of the present invention. 図１に示すＡ部の断面図である。It is sectional drawing of the A section shown in FIG. 溝部内にエンベロープが入り込んだプレキュアトレッドの断面図である。It is sectional drawing of the precure tread which the envelope entered in the groove part. スリットを形成したプレキュアトレッドの断面図である。It is sectional drawing of the precure tread which formed the slit. プレキュア方式の製造方法において従来のプレキュアトレッドを用いた場合の断面図であって、（ａ）は加硫前の状態を、（ｂ）は加硫中の状態を、それぞれ示す。It is sectional drawing at the time of using the conventional precure tread in the manufacturing method of a precure system, (a) shows the state before vulcanization, (b) shows the state in vulcanization, respectively.

以下に、本発明の実施の形態について、図面を参照して説明する。   Embodiments of the present invention will be described below with reference to the drawings.

図１は、本発明の実施形態からなるプレキュアトレッドを用いた更生タイヤを示す。なお、従来技術と同じ部分には同一符号を付し、説明を省略する。   FIG. 1 shows a retreaded tire using a precure tread according to an embodiment of the present invention. In addition, the same code | symbol is attached | subjected to the part same as a prior art, and description is abbreviate | omitted.

プレキュアトレッド１は、加硫したゴム板の外面２に溝部３などからなるパターンを形成したものであり、台タイヤ４のトレッド面に接着層５を介して貼り付けられる。図２に示すように、このプレキュアトレッド１の溝部３に対応する内面６には凹部７が形成されている。凹部７の断面形状は特に限定するものではないが、後述するプレキュアトレッド１の変形を均等に吸収できるように、半円形又は半楕円形とすることが好ましい。   The precure tread 1 is formed by forming a pattern made of a groove 3 or the like on the outer surface 2 of a vulcanized rubber plate, and is attached to the tread surface of the base tire 4 via an adhesive layer 5. As shown in FIG. 2, a recess 7 is formed on the inner surface 6 corresponding to the groove 3 of the precure tread 1. The cross-sectional shape of the concave portion 7 is not particularly limited, but is preferably a semicircular shape or a semielliptical shape so that the deformation of the precure tread 1 described later can be uniformly absorbed.

このようにプレキュアトレッド１を構成したことにより、更生タイヤのプレキュア方式の製造方法において、図３に示すように、エンベロープ８が溝部３内に入り込んで溝底９を押し拡げるように作用しても、凹部７が潰れることによりプレキュアトレッド１の変形を吸収するので、接着層５が薄肉化しないため、更生タイヤの耐久性が低下することはない。   By configuring the precure tread 1 in this way, in the retreaded tire precure manufacturing method, as shown in FIG. 3, the envelope 8 enters the groove 3 and acts to expand the groove bottom 9. However, since the deformation | transformation of the precure tread 1 is absorbed when the recessed part 7 is crushed, since the contact bonding layer 5 is not thinned, durability of a retreaded tire does not fall.

凹部７の深さＨは溝部３の深さＸの０．０５〜０．１５倍とし、かつ凹部７の幅Ｗは溝部３の５０％深さ位置における溝幅Ｙの０．８〜１．２倍とすることが望ましい。深さＸ及び幅Ｗのいずれかがこの範囲未満であるとプレキュアトレッド１の変形を吸収する効果が不十分となり、この範囲を超えると接着層５の未加硫ゴムが凹部７内へ流入し、いずれの場合も凹部７の周囲の接着層５が薄肉化してしまう。   The depth H of the recess 7 is 0.05 to 0.15 times the depth X of the groove 3, and the width W of the recess 7 is 0.8 to 1.5 of the groove width Y at the 50% depth position of the groove 3. It is desirable to double. If either the depth X or the width W is less than this range, the effect of absorbing the deformation of the precure tread 1 will be insufficient, and if it exceeds this range, the unvulcanized rubber of the adhesive layer 5 will flow into the recess 7. In either case, the adhesive layer 5 around the recess 7 becomes thin.

また、図４に示すように、凹部７と溝部３とをスリット１０により連通することが望ましい。このようにすることで、凹部７内に滞留する空気をスリット１０を通じて外部へ放出することができるため、プレキュアトレッド１と台タイヤ４との接着力を向上することができる。スリット１０は、空気を効率的に通過させるために、タイヤ径方向に沿って直線状に延びることが好ましいが、わずかに傾けることで、製造後の更生タイヤにおけるトレッド内部への異物の侵入を防止することができる。なお、スリット１０の代わりに孔部を形成するようにしてもよい。   Further, as shown in FIG. 4, it is desirable that the recess 7 and the groove 3 are communicated with each other through a slit 10. By doing in this way, since the air which stays in the recessed part 7 can be discharge | released outside through the slit 10, the adhesive force of the precure tread 1 and the base tire 4 can be improved. The slit 10 preferably extends linearly along the tire radial direction in order to allow air to pass efficiently. However, the slit 10 is slightly inclined to prevent foreign matter from entering the tread in the retread tire after manufacture. can do. A hole may be formed instead of the slit 10.

上記のスリット１０は、溝部３がプレキュアトレッド１の周方向に延びる主溝である場合には、周方向に対して間欠的に形成する必要があるが、その間隔は４０〜８０ｍｍとすることが好ましい。この範囲未満であるとプレキュアトレッド１の強度が低下し、この範囲を超えると空気抜きの効果が不十分になる。   The slit 10 needs to be intermittently formed in the circumferential direction when the groove 3 is a main groove extending in the circumferential direction of the precure tread 1, but the interval is 40 to 80 mm. Is preferred. If it is less than this range, the strength of the precure tread 1 is reduced, and if it exceeds this range, the effect of venting air becomes insufficient.

１ プレキュアトレッド
２ 外面
３ 溝部
４ 台タイヤ
５ 接着層
６ 内面
７ 凹部
８ エンベロープ
９ 溝底
１０ スリット
１１ （従来の）プレキュアトレッド DESCRIPTION OF SYMBOLS 1 Precured tread 2 Outer surface 3 Groove part 4 Tire 5 Adhesive layer 6 Inner surface 7 Recessed part 8 Envelope 9 Groove bottom 10 Slit 11 (Conventional) Precure tread

Claims (4)

台タイヤのトレッド部に接着層を介して圧着されるプレキュアトレッドにおいて、
前記プレキュアトレッドの外面に形成された溝部に対応する内面に凹部を形成したプレキュアトレッド。 In the pre-cured tread that is pressure-bonded to the tread part of the base tire via an adhesive layer,
A precure tread having a recess formed on an inner surface corresponding to a groove formed on an outer surface of the precure tread. 前記凹部の深さを前記溝部の深さの０．０５〜０．１５倍とし、かつ前記凹部の幅を前記溝部の５０％深さ位置における溝幅の０．８〜１．２倍とした請求項１に記載のプレキュアトレッド。   The depth of the recess is 0.05 to 0.15 times the depth of the groove, and the width of the recess is 0.8 to 1.2 times the groove width at the 50% depth position of the groove. The precure tread according to claim 1. 前記凹部と前記溝部とを連通するスリットを形成した請求項１又は２に記載のプレキュアトレッド。   The precure tread according to claim 1 or 2, wherein a slit is formed to communicate the recess and the groove. 請求項１〜３に記載のプレキュアトレッドを用いてプレキュア方式で製造された更生タイヤ。   A retread tire manufactured by a precure method using the precure tread according to claim 1.
JP2009021740A 2009-02-02 2009-02-02 Precure tread and retreaded tire using the same Expired - Fee Related JP5245877B2 (en)

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Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012091588A (en) * 2010-10-25 2012-05-17 Bridgestone Corp Vulcanized tread and tire manufacturing method
JP2012091587A (en) * 2010-10-25 2012-05-17 Bridgestone Corp Vulcanized tread and method of manufacturing tire
US20130139938A1 (en) * 2010-08-06 2013-06-06 Bridgestone Corporation Tire manufacturing method, tread member and tire
JP2013116648A (en) * 2011-12-01 2013-06-13 Yokohama Rubber Co Ltd:The Precure tread and precure retreaded tire
JP2013542118A (en) * 2010-09-14 2013-11-21 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tire and mold having fluid passage
US20150343856A1 (en) * 2012-12-25 2015-12-03 The Yokohama Rubber Co., Ltd. Tire/Wheel Assembly and Tread Ring
JP2016026954A (en) * 2015-10-06 2016-02-18 株式会社ブリヂストン Vulcanized tread and tire manufacturing method
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
US10377102B2 (en) * 2013-08-30 2019-08-13 Compagnie Generale Des Etablissements Michelin Removable connector for pre-cured tread and methods for forming a retreaded tire

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JP2005193702A (en) * 2003-12-26 2005-07-21 Yokohama Rubber Co Ltd:The Pneumatic tire and heavy duty pneumatic tire
JP2006143134A (en) * 2004-11-24 2006-06-08 Sumitomo Rubber Ind Ltd Pneumatic tire
JP2007168490A (en) * 2005-12-19 2007-07-05 Yokohama Rubber Co Ltd:The Pneumatic bias tire
JP2007246077A (en) * 2006-02-17 2007-09-27 Yokohama Rubber Co Ltd:The Pneumatic tire
JP2007283961A (en) * 2006-04-19 2007-11-01 Yokohama Rubber Co Ltd:The Pneumatic tire
JP2007320044A (en) * 2006-05-30 2007-12-13 Bridgestone Corp Manufacturing method of precured tread for tire

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JPS58134728A (en) * 1981-09-21 1983-08-11 バンダグ・ライセンシング・コ−ポレ−ション Method of regenerating tread of tire casing
JPS62261406A (en) * 1986-05-08 1987-11-13 Ohtsu Tire & Rubber Co Ltd Manufacture of reclaimed tire
JPH01317807A (en) * 1988-03-29 1989-12-22 Bridgestone Corp Precured tread for tire, tire used precured tread and manufacture of such tire
JPH02307739A (en) * 1989-05-22 1990-12-20 Ohtsu Tire & Rubber Co Ltd :The Reclamation of tire tread
JPH03132340A (en) * 1989-10-17 1991-06-05 Toyo Tire & Rubber Co Ltd Preparation of recapped tire
JPH05155202A (en) * 1991-12-09 1993-06-22 Bridgestone Corp Precure tread for tire and manufacture thereof and regenerated tire using the same
JPH08156133A (en) * 1994-12-06 1996-06-18 Kurt Edler Regenerating method of used tire
JPH0970903A (en) * 1995-06-26 1997-03-18 Yokohama Rubber Co Ltd:The Precure tread for regenerated tire and manufacture thereof
JP2004034772A (en) * 2002-07-01 2004-02-05 Yokohama Rubber Co Ltd:The Pneumatic radial tire for heavy duty
JP2005145144A (en) * 2003-11-12 2005-06-09 Yokohama Rubber Co Ltd:The Pneumatic tire and method of manufacturing the same
JP2005193702A (en) * 2003-12-26 2005-07-21 Yokohama Rubber Co Ltd:The Pneumatic tire and heavy duty pneumatic tire
JP2006143134A (en) * 2004-11-24 2006-06-08 Sumitomo Rubber Ind Ltd Pneumatic tire
JP2007168490A (en) * 2005-12-19 2007-07-05 Yokohama Rubber Co Ltd:The Pneumatic bias tire
JP2007246077A (en) * 2006-02-17 2007-09-27 Yokohama Rubber Co Ltd:The Pneumatic tire
JP2007283961A (en) * 2006-04-19 2007-11-01 Yokohama Rubber Co Ltd:The Pneumatic tire
JP2007320044A (en) * 2006-05-30 2007-12-13 Bridgestone Corp Manufacturing method of precured tread for tire

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20130139938A1 (en) * 2010-08-06 2013-06-06 Bridgestone Corporation Tire manufacturing method, tread member and tire
JP2013542118A (en) * 2010-09-14 2013-11-21 コンパニー ゼネラール デ エタブリッスマン ミシュラン Tire and mold having fluid passage
JP2012091588A (en) * 2010-10-25 2012-05-17 Bridgestone Corp Vulcanized tread and tire manufacturing method
JP2012091587A (en) * 2010-10-25 2012-05-17 Bridgestone Corp Vulcanized tread and method of manufacturing tire
JP2013116648A (en) * 2011-12-01 2013-06-13 Yokohama Rubber Co Ltd:The Precure tread and precure retreaded tire
US20150343856A1 (en) * 2012-12-25 2015-12-03 The Yokohama Rubber Co., Ltd. Tire/Wheel Assembly and Tread Ring
US9975386B2 (en) * 2012-12-25 2018-05-22 The Yokohama Rubber Co., Ltd. Tire/wheel assembly and tread ring
US10377102B2 (en) * 2013-08-30 2019-08-13 Compagnie Generale Des Etablissements Michelin Removable connector for pre-cured tread and methods for forming a retreaded tire
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
JP2016026954A (en) * 2015-10-06 2016-02-18 株式会社ブリヂストン Vulcanized tread and tire manufacturing method

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