JPH10129216A - Precure tread and recapped tire - Google Patents
Precure tread and recapped tireInfo
- Publication number
- JPH10129216A JPH10129216A JP8294118A JP29411896A JPH10129216A JP H10129216 A JPH10129216 A JP H10129216A JP 8294118 A JP8294118 A JP 8294118A JP 29411896 A JP29411896 A JP 29411896A JP H10129216 A JPH10129216 A JP H10129216A
- Authority
- JP
- Japan
- Prior art keywords
- tread
- tire
- rubber
- rough surface
- precured
- 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
- 229920001971 elastomer Polymers 0.000 claims abstract description 50
- 239000005060 rubber Substances 0.000 claims abstract description 50
- 230000020169 heat generation Effects 0.000 claims abstract description 25
- 230000002093 peripheral effect Effects 0.000 claims abstract description 8
- 239000000853 adhesive Substances 0.000 claims description 7
- 230000001070 adhesive effect Effects 0.000 claims description 7
- 238000000465 moulding Methods 0.000 description 7
- 230000001681 protective effect Effects 0.000 description 5
- 238000004073 vulcanization Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 150000001875 compounds Chemical class 0.000 description 2
- 210000000988 bone and bone Anatomy 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 239000003779 heat-resistant material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Landscapes
- Tyre Moulding (AREA)
- Tires In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、再生タイヤに使用
するプレキュアトレッド及びこのプレキュアトレッドを
使用した再生タイヤに関し、さらに詳しくは、走行時に
おける低発熱性を向上させたプレキュアトレッド及び再
生タイヤに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pre-cured tread used for a reclaimed tire and a reclaimed tire using the pre-cured tread, and more particularly, to a pre-cured tread with improved low heat generation during running and a reclaimed tire. Regarding tires.
【０００２】[0002]
【従来の技術】再生タイヤの製造方法として、予め加硫
成形されたプレキュアトレッドを台タイヤの外周面に貼
り付ける方法がある。このプレキュアトレッドは、通
常、１種類のゴムコンパウンドから構成し、予め高い圧
力をかけた状態で加硫成形するため、硬度が高く良質で
ある。また、このように成形されたプレキュアトレッド
は、台タイヤに接着する際には比較的低温でクッション
ゴムを介して加硫接着することができるので、台タイヤ
を傷める度合いが少ないという利点がある。2. Description of the Related Art As a method for manufacturing a recycled tire, there is a method in which a vulcanized precured tread is attached to an outer peripheral surface of a base tire. This precured tread is usually made of one type of rubber compound, and is vulcanized and molded under high pressure in advance, so that it has high hardness and good quality. In addition, when the pre-cured tread thus formed can be vulcanized and bonded via a cushion rubber at a relatively low temperature when bonded to a base tire, there is an advantage that the degree of damaging the base tire is small. .
【０００３】しかしながら、一般に新品タイヤがトレッ
ドのカーカス層側に低発熱性のアンダートレッドを備え
ているのに対し、プレキュアトレッドは１種類のゴムコ
ンパウンドから構成されるため、再生タイヤにおいて走
行時にトレッド内部に生じる発熱の問題に対処すること
ができないという問題があった。特に、再生タイヤのト
レッド内部の特定部分において発熱が集中すると、走行
時にトレッドがタイヤから剥離する危険がある。[0003] However, in general, a new tire is provided with a low heat generating undertread on the side of the carcass layer of the tread, whereas a precured tread is composed of one kind of rubber compound. There is a problem that it is not possible to deal with the problem of heat generated inside. In particular, if heat is concentrated at a specific portion inside the tread of the recycled tire, there is a risk that the tread will peel off from the tire during running.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、再生
後の走行時における低発熱性を向上させることを可能に
したプレキュアトレッド及び再生タイヤを提供すること
にある。SUMMARY OF THE INVENTION It is an object of the present invention to provide a pre-cured tread and a regenerated tire which are capable of improving the low heat build-up during running after regeneration.
【０００５】[0005]
【課題を解決するための手段】上記目的を達成するため
の本発明のプレキュアトレッドは、踏面にトレッドパタ
ーンを有する帯状のプレキュアトレッドにおいて、台タ
イヤに対する接着表面に凹凸からなる成形粗面を形成
し、前記トレッドパターンに基づく高発熱領域における
前記成形粗面の凹凸の深さを該高発熱領域以外の領域よ
りも深くしたことを特徴とするものである。According to the present invention, there is provided a precured tread having a tread pattern having a tread pattern on a tread surface. The irregularities of the formed rough surface in the high heat generation region based on the tread pattern are formed to be deeper than the regions other than the high heat generation region.
【０００６】また、上記目的を達成するための本発明の
再生タイヤは、上記プレキュアトレッドを、接着用のク
ッションゴムを介して台タイヤの外周面に貼り付け、前
記クッションゴムとして前記プレキュアトレッドを構成
するゴムよりも発熱性が低いゴムを使用することを特徴
とするものである。このようにプレキュアトレッドの高
発熱領域において成形粗面の凹凸の深さを該高発熱領域
以外の領域よりも深くし、クッションゴムに低発熱性の
ゴムを使用することにより、プレキュアトレッドと台タ
イヤとの間に前記成形粗面の凹凸の深さに応じて低発熱
性のクッションゴムが配置されるので、トレッドパター
ンに基づく高発熱領域における発熱を低減することがで
きる。In order to achieve the above object, a reclaimed tire according to the present invention is characterized in that the precured tread is attached to the outer peripheral surface of a base tire via an adhesive cushion rubber, and the precured tread is used as the cushion rubber. Is characterized by using a rubber having a lower heat build-up than the rubber constituting (i). As described above, the depth of the unevenness of the molded rough surface in the high heat generation region of the precured tread is made deeper than the region other than the high heat generation region, and by using a low heat generation rubber for the cushion rubber, the precured tread and the Since the low-heat-generating cushion rubber is arranged between the base tire and the irregularities of the molded rough surface, heat generation in a high-heat area based on the tread pattern can be reduced.
【０００７】本発明において、高発熱領域とはトレッド
パターンに起因して局所的に発熱が多くなる領域であ
る。例えば、踏面にリブ基調のトレッドパターンを有す
るプレキュアトレッドの場合、高発熱領域はタイヤの両
ショルダー部に相当する領域となり、踏面にラグ基調の
トレッドパターンを有するプレキュアトレッドの場合、
高発熱領域はタイヤのセンター部に相当する領域とな
る。In the present invention, the high heat generation region is a region where heat is locally increased due to the tread pattern. For example, in the case of a pre-cure tread having a rib-based tread pattern on the tread, the high heat generation area is an area corresponding to both shoulder portions of the tire, and in the case of a pre-cure tread having a lug-based tread pattern on the tread,
The high heat generation region is a region corresponding to the center of the tire.
【０００８】従って、リブ基調のトレッドパターンを有
するプレキュアトレッドにおいては、両ショルダー部に
おける成形粗面の凹凸の深さを該両ショルダー部以外の
領域よりも深くし、このプレキュアトレッドを低発熱性
のクッションゴムを介して台タイヤの外周面に貼り付け
て再生タイヤを構成する。この場合、両ショルダー部と
は、タイヤ幅方向の最外側に位置してタイヤ周方向に延
びるリブの下方域をいう。Accordingly, in the precured tread having the tread pattern based on the ribs, the depth of the unevenness of the formed rough surface in both shoulder portions is made deeper than the region other than the both shoulder portions, so that the precured tread has low heat generation. It is attached to the outer peripheral surface of the base tire via the elastic cushion rubber to form a recycled tire. In this case, both shoulder portions refer to a lower region of a rib located on the outermost side in the tire width direction and extending in the tire circumferential direction.
【０００９】一方、ラグ基調のトレッドパターンを有す
るプレキュアトレッドにおいては、センター部における
成形粗面の凹凸の深さを該センター部以外の領域よりも
深くし、このプレキュアトレッドを低発熱性のクッショ
ンゴムを介して台タイヤの外周面に貼り付けて再生タイ
ヤを構成する。この場合、センター部とは、タイヤ幅方
向に延びるラグ溝によって分断されずにタイヤ周方向に
延びるリブの下方域をいう。On the other hand, in a pre-cure tread having a lug-based tread pattern, the depth of the unevenness of the molded rough surface in the center portion is made deeper than a region other than the center portion, and this pre-cure tread has a low heat-generating property. A recycled tire is formed by attaching the tire to the outer peripheral surface of the base tire via the cushion rubber. In this case, the center portion refers to a lower region of the rib extending in the tire circumferential direction without being divided by the lug groove extending in the tire width direction.
【００１０】[0010]
【発明の実施の形態】以下、本発明の構成について添付
の図面を参照して詳細に説明する。図１及び図２は、本
発明の第１の実施形態からなるリブ基調のトレッドパタ
ーンを有する再生タイヤを示すものである。図におい
て、１は台タイヤ、２はクッションゴム、３はプレキュ
アトレッドである。プレキュアトレッド３は、その踏面
にタイヤ周方向に延びる複数の主溝４が設けられてお
り、これら複数の主溝４によって５本のリブ５ａ〜５ｅ
が区分されている。タイヤ幅方向中央部に位置する３本
のリブ５ｂ，５ｃ，５ｄにはそれぞれタイヤ幅方向に延
びる複数のサイプ６が設けられている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to the accompanying drawings. 1 and 2 show a regenerated tire having a rib-based tread pattern according to a first embodiment of the present invention. In the drawing, 1 is a base tire, 2 is a cushion rubber, and 3 is a pre-cured tread. The precured tread 3 is provided with a plurality of main grooves 4 extending in the tire circumferential direction on a tread surface thereof, and the plurality of main grooves 4 form five ribs 5a to 5e.
Are classified. A plurality of sipes 6 extending in the tire width direction are provided on the three ribs 5b, 5c, 5d located at the center in the tire width direction.
【００１１】一方、プレキュアトレッド３の台タイヤ１
に対する接着表面には、微細な凹凸からなる成形粗面７
ａ，７ｂが形成されている。両ショルダー部に位置する
リブ５ａ，５ｄの下方域に形成された成形粗面７ａは、
それ以外の領域に形成された成形粗面７ｂに比べて凹凸
が深くなっている。クッションゴム２は、台タイヤ１と
プレキュアトレッド３との間に介在し、両者を加硫接着
している。このクッションゴム２は、プレキュアトレッ
ド３を構成するゴムよりも発熱性が低いゴムから構成さ
れており、上記プレキュアトレッド３の成形粗面７ａ，
７ｂの深部にまで侵入している。On the other hand, the base tire 1 of the pre-cured tread 3
The rough surface 7 formed of fine irregularities
a, 7b are formed. The formed rough surface 7a formed in the lower region of the ribs 5a, 5d located on both shoulder portions is
The irregularities are deeper than the rough molding surface 7b formed in other areas. The cushion rubber 2 is interposed between the base tire 1 and the pre-cured tread 3, and both are vulcanized and adhered. The cushion rubber 2 is made of a rubber having a lower heat build-up than the rubber constituting the pre-cured tread 3, and the molded rough surface 7a,
It has penetrated deep into 7b.
【００１２】このように構成された再生タイヤにおいて
は、プレキュアトレッド３の両ショルダー部における成
形粗面７ａを他の領域の成形粗面７ｂよりも選択的に深
く形成したので、低発熱性のクッションゴム２が両ショ
ルダー部において比較的に多く配置される。従って、通
常はリブ基調のトレッドパターンにおいて両ショルダー
部における発熱が多くなるが、その発熱を低発熱性のク
ッションゴム２の配置によって低減することができる。In the reconstructed tire thus configured, the formed rough surfaces 7a in both shoulder portions of the precured tread 3 are selectively formed deeper than the formed rough surfaces 7b in other regions, so that low heat build-up is achieved. A relatively large amount of cushion rubber 2 is arranged at both shoulder portions. Therefore, in the tread pattern based on the ribs, the heat generated in both shoulder portions is usually increased. However, the generated heat can be reduced by disposing the cushion rubber 2 having low heat generation.
【００１３】本発明において、クッションゴム２は、プ
レキュアトレッド３のゴムに比べて発熱性が低ければ作
用効果を奏するが、好ましくは測定温度６０℃における
ｔａｎδが０．０７０以下の低発熱性ゴムを使用する。
また、図３に示すように、プレキュアトレッド３の両シ
ョルダー部（高発熱領域）における成形粗面７ａは凹凸
の深さＸ1 を２．０〜６．０ｍｍとし、その幅Ｙ1 を
０．２〜０．６ｍｍにすることが好ましい。一方、両シ
ョルダー部（高発熱領域）以外の領域における成形粗面
７ｂは凹凸の深さＸ2 を０．６〜１．４ｍｍとし、その
幅Ｙ2 を０．２〜０．６ｍｍにすることが好ましい。In the present invention, the cushion rubber 2 has an effect if its heat generation is lower than that of the rubber of the pre-cured tread 3, but it is preferable that the cushion rubber 2 has a low heat generation rubber having a tan δ of 0.070 or less at a measurement temperature of 60 ° C. Use
Further, as shown in FIG. 3, the molding rough surface 7a at both shoulder portions (high heat generating area) of the precured tread 3 the depth X 1 of the irregularities and 2.0 to 6.0 mm, the width Y 1 0 It is preferable to set the thickness to 0.2 to 0.6 mm. Meanwhile, the molding rough surface 7b in the region other than the both shoulder portions (highly exothermic region) the depth X 2 of the irregularities and 0.6～1.4Mm, the width Y 2 in 0.2~0.6mm Is preferred.
【００１４】成形粗面７ａ，７ｂの寸法を上記のように
設定することにより、クッションゴム２の接着性を十分
に得ることができると共に、高発熱領域における発熱を
選択的に低減することができる。また、成形粗面７ａの
頂点から主溝４の底部までの溝下深さＺは１ｍｍ以上確
保することが好ましい。溝下深さＺを１ｍｍ以上にする
ことにより、走行中に主溝４と成形粗面７ａとの連通に
よってクラックが生じることを防止できる。By setting the dimensions of the molded rough surfaces 7a and 7b as described above, the adhesiveness of the cushion rubber 2 can be sufficiently obtained, and the heat generation in the high heat generation region can be selectively reduced. . Further, it is preferable that the depth Z under the groove from the top of the roughened surface 7a to the bottom of the main groove 4 is 1 mm or more. By setting the depth Z below the groove to 1 mm or more, it is possible to prevent cracks from occurring due to communication between the main groove 4 and the formed rough surface 7a during traveling.
【００１５】次に、上述のプレキュアトレッド及び再生
タイヤの製造方法について説明する。図４はプレキュア
トレッドの加硫成形用金型を示す断面図である。図４に
示すように、加硫成形用金型は下型１１と上型１２とか
らなり、下型１１の底部にはタイヤのトレッドパターン
を成形する溝成形骨１３が設けられている。保護シート
１４は加硫温度以上の軟化点を有する耐熱性材料からな
り、その表面にプレキュアトレッド３の成形粗面７ａ，
７ｂを成形する凹凸が形成されている。Next, a method for manufacturing the above-described precured tread and recycled tire will be described. FIG. 4 is a sectional view showing a mold for vulcanization molding of a precured tread. As shown in FIG. 4, the mold for vulcanization molding includes a lower mold 11 and an upper mold 12, and a groove forming bone 13 for molding a tread pattern of a tire is provided at the bottom of the lower mold 11. The protective sheet 14 is made of a heat-resistant material having a softening point equal to or higher than the vulcanization temperature, and has a roughened surface 7a of the pre-cured tread 3 on its surface.
Irregularities for forming 7b are formed.
【００１６】プレキュアトレッド３の製造に際しては、
先ず、下型１１内に未加硫ゴムを入れ、その上に全表面
をわたって保護シート１４を凹凸面が未加硫ゴムに接す
るように配置し、上型１２を被せた後に、未加硫ゴムを
保護シート１４と共に加熱して加硫することによりプレ
キュアトレッド３を得ることができる。このように製造
されたプレキュアトレッド３は、台タイヤ１に貼り合わ
されるまで保護シート１４が貼り合わされたままの状態
で保管しておけば、台タイヤ１への接着面を新鮮な状態
に保持することができる。また、保護シート１４を剥が
した後のプレキュアトレッド３の接着面には成形粗面７
ａ，７ｂが現れるので、サンダーバフ加工を行う必要が
ない。In producing the precured tread 3,
First, the unvulcanized rubber is put into the lower mold 11, the protective sheet 14 is placed over the entire surface so that the uneven surface is in contact with the unvulcanized rubber, and after the upper mold 12 is covered, the unvulcanized rubber is covered. Precured tread 3 can be obtained by heating and vulcanizing the vulcanized rubber together with protective sheet 14. If the pre-cured tread 3 manufactured in this way is stored in a state where the protective sheet 14 is bonded to the base tire 1 until it is bonded to the base tire 1, the surface to be bonded to the base tire 1 is kept fresh. can do. Further, the molded rough surface 7 is formed on the adhesive surface of the precured tread 3 after the protective sheet 14 is peeled off.
Since a and b appear, there is no need to perform sander buffing.
【００１７】再生タイヤの製造に際しては、上述のプレ
キュアトレッド３を成形粗面７ａ，７ｂを台タイヤ１に
向けて接着用の未加硫のクッションゴム２を介して台タ
イヤ１の外周面に貼り付ける。そして、プレキュアトレ
ッド３を貼り付けた台タイヤ１を比較的低い温度で加硫
接着することにより再生タイヤを得ることができる。ク
ッションゴム２は加硫時にプレキュアトレッド３を成形
粗面７ａ，７ｂに流入し、プレキュアトレッド３と台タ
イヤ１とを強固に接着する。In manufacturing a recycled tire, the above-mentioned pre-cured tread 3 is formed on the outer peripheral surface of the base tire 1 via the uncured cushion rubber 2 for bonding with the roughened surfaces 7a and 7b facing the base tire 1. paste. Then, the base tire 1 to which the pre-cured tread 3 has been attached is vulcanized and bonded at a relatively low temperature, whereby a recycled tire can be obtained. The cushion rubber 2 flows the pre-cured tread 3 into the molded rough surfaces 7a and 7b at the time of vulcanization, and firmly adheres the pre-cured tread 3 to the base tire 1.
【００１８】図５及び図６は、本発明の第２の実施形態
からなるラグ基調のトレッドパターンを有する再生タイ
ヤを示すものである。プレキュアトレッド３は、その踏
面にタイヤ周方向に延びる複数の主溝４が設けられてい
ると共に、両ショルダー部からセンター部に向けてタイ
ヤ幅方向に延びる複数のラグ溝８が設けられており、こ
れら複数の主溝４及びラグ溝８によってセンター部のリ
ブ５ｆと両ショルダー部のブロック９とが区分されてい
る。一方、プレキュアトレッド３の台タイヤ１に対する
接着表面には成形粗面７ａ，７ｂが形成されており、セ
ンター部に位置するリブ５ｆの下方域に形成された成形
粗面７ａは、それ以外の領域に形成された成形粗面７ｂ
に比べて凹凸が深くなっている。FIGS. 5 and 6 show a regenerated tire having a lug-based tread pattern according to a second embodiment of the present invention. The precured tread 3 is provided with a plurality of main grooves 4 extending in the tire circumferential direction on the tread surface, and a plurality of lug grooves 8 extending in the tire width direction from both shoulder portions toward the center portion. The ribs 5f at the center and the blocks 9 at both shoulders are separated by the plurality of main grooves 4 and lug grooves 8. On the other hand, formed rough surfaces 7a and 7b are formed on the surface of the precured tread 3 bonded to the base tire 1, and the formed rough surface 7a formed in a region below the rib 5f located at the center portion is the other. Molded rough surface 7b formed in region
The unevenness is deeper than that of.
【００１９】クッションゴム２は、第１実施例と同様
に、プレキュアトレッド３を構成するゴムよりも発熱性
が低いゴムから構成されており、上記プレキュアトレッ
ド３の成形粗面７ａ，７ｂの深部にまで侵入している。
このように構成された再生タイヤにおいては、プレキュ
アトレッド３のセンター部における成形粗面７ａを他の
領域の成形粗面７ｂよりも選択的に深く形成したので、
低発熱性のクッションゴム２がセンター部において比較
的に多く配置される。従って、通常はラグ基調のトレッ
ドパターンにおいてセンター部における発熱が多くなる
が、その発熱を低発熱性のクッションゴム２の配置によ
って低減することができる。As in the first embodiment, the cushion rubber 2 is made of rubber having a lower heat build-up than the rubber constituting the pre-cured tread 3, and the roughened surfaces 7a, 7b of the pre-cured tread 3 are formed. It has penetrated deep.
In the recycled tire configured as described above, the formed rough surface 7a in the center portion of the pre-cured tread 3 is selectively formed deeper than the formed rough surface 7b in other regions.
A relatively large number of low heat-generating cushion rubbers 2 are arranged in the center portion. Accordingly, the heat generated in the center portion of the lug-based tread pattern usually increases, but the heat can be reduced by disposing the cushion rubber 2 having low heat generation.
【００２０】[0020]
【実施例】タイヤサイズ１１Ｒ２２．５とし、タイヤ構
造を下記のように異ならせた本発明タイヤ及び従来タイ
ヤを製作した。なお、各タイヤにおいて、プレキュアト
レッド３を構成するゴムとしてｔａｎδが０．２００ゴ
ムを使用し、クッションゴム２を構成するゴムとしてｔ
ａｎδが０．０６０のゴムを使用した。本発明タイヤ１ 図１に示すリブ基調のトレッドパターンを有し、図２に
示すようにプレキュアトレッド３の両ショルダー部にお
ける成形粗面７ａを他の領域の成形粗面７ｂよりも選択
的に深くした。本発明タイヤ２ 図５に示すラグ基調のトレッドパターンを有し、図６に
示すようにプレキュアトレッド３のセンター部における
成形粗面７ａを他の領域の成形粗面７ｂよりも選択的に
深くした。従来タイヤ１ 図１に示すリブ基調のトレッドパターンを有し、プレキ
ュアトレッド３の成形粗面の深さを接着面において均一
にしたこと以外は本発明タイヤ１と同一のタイヤ構造と
した。従来タイヤ２ 図５に示すリブ基調のトレッドパターンを有し、プレキ
ュアトレッド３の成形粗面の深さを接着面において均一
にしたこと以外は本発明タイヤ２と同一のタイヤ構造と
した。EXAMPLES Tires of the present invention and conventional tires were manufactured with a tire size of 11R22.5 and different tire structures as described below. In each tire, a rubber having a tan δ of 0.200 was used as a rubber constituting the pre-cured tread 3, and t
A rubber having an δ of 0.060 was used. Tire 1 of the present invention has a rib-based tread pattern shown in FIG. 1 and selectively forms formed rough surfaces 7a at both shoulder portions of precured tread 3 over formed rough surfaces 7b in other regions as shown in FIG. Deepened. The present invention tire 2 has a lug-based tread pattern shown in FIG. 5, and the formed rough surface 7a in the center portion of the precured tread 3 is selectively deeper than the formed rough surface 7b in other regions as shown in FIG. did. Conventional tire 1 The tire structure was the same as that of the tire 1 of the present invention except that the tire 1 had the rib-based tread pattern shown in FIG. 1 and the depth of the molded rough surface of the precured tread 3 was made uniform on the bonding surface. Conventional tire 2 The tire structure was the same as that of the tire 2 of the present invention, except that the tire 2 had the rib-based tread pattern shown in FIG. 5 and the depth of the roughened surface of the precured tread 3 was uniform on the bonding surface.
【００２１】これらタイヤについて、下記の試験方法に
より低発熱性を評価し、その結果を表１に示した。低発熱性 ドラム試験機により一定荷重下でタイヤの回転速度を徐
々に上昇させ、トレッド部の温度が１００°Ｃに到達し
たときの速度を検出した。その結果は、従来タイヤ１，
２を１００とする指数値で示した。この指数値が大きい
ほど低発熱性が優れている。For these tires, low heat build-up was evaluated by the following test methods. The results are shown in Table 1. The rotational speed of the tire was gradually increased under a constant load using a low heat-generating drum tester, and the speed when the temperature of the tread reached 100 ° C. was detected. The result is that
It was shown as an index value with 2 as 100. The larger the index value, the better the low heat buildup.
【００２２】 この表１から明らかなように、リブパターンを有するプ
レキュアトレッドのショルダー部における成形粗面７ａ
を深くした本発明タイヤ１及びラグパターンを有するプ
レキュアトレッドのセンター部における成形粗面７ａを
深くした本発明タイヤ２はそれぞれ従来タイヤ１，２に
比べて低発熱性が向上していた。[0022] As is clear from Table 1, the molded rough surface 7a in the shoulder portion of the precured tread having the rib pattern
The tire 1 of the present invention having a deeper tire and the tire 2 of the present invention having a deeper roughened surface 7a at the center of a precured tread having a rug pattern had improved low heat generation properties as compared with the conventional tires 1 and 2, respectively.
【００２３】[0023]
【発明の効果】以上説明したように本発明によれば、踏
面にトレッドパターンを有する帯状のプレキュアトレッ
ドにおいて、台タイヤに対する接着表面に凹凸からなる
成形粗面を形成し、前記トレッドパターンに基づく高発
熱領域における前記成形粗面の凹凸の深さを該高発熱領
域以外の領域よりも深くし、また再生タイヤにおいて、
該プレキュアトレッドを接着用のクッションゴムを介し
て台タイヤの外周面に貼り付け、前記クッションゴムと
して前記プレキュアトレッドを構成するゴムよりも発熱
性が低いゴムを使用したから、前記高発熱領域における
発熱を選択的に低減し、走行時における低発熱性を向上
させることができる。As described above, according to the present invention, in a belt-shaped pre-cured tread having a tread pattern on a tread surface, a molded rough surface made of irregularities is formed on an adhesion surface to a base tire, and based on the tread pattern. The depth of the irregularities of the molded rough surface in the high heat generation region is made deeper than the region other than the high heat generation region, and in a recycled tire,
The pre-cured tread was adhered to the outer peripheral surface of the base tire via an adhesive cushion rubber, and a rubber having a lower heat build-up than the rubber constituting the pre-cured tread was used as the cushion rubber. Can be selectively reduced, and low heat generation during running can be improved.
【図１】本発明の第１の実施形態からなる再生タイヤの
トレッドパターンを示す部分展開図である。FIG. 1 is a partially developed view showing a tread pattern of a recycled tire according to a first embodiment of the present invention.
【図２】図１の再生タイヤの半断面図である。FIG. 2 is a half sectional view of the recycled tire of FIG. 1;
【図３】図１の再生タイヤに使用するプレキュアトレッ
ドの要部を示す部分拡大断面図である。FIG. 3 is a partially enlarged cross-sectional view showing a main part of a pre-cured tread used for the recycled tire of FIG.
【図４】図３のプレキュアトレッドの成形金型を示す断
面図である。FIG. 4 is a sectional view showing a molding die of the precured tread of FIG. 3;
【図５】本発明の第２の実施形態からなる再生タイヤの
トレッドパターンを示す部分展開図である。FIG. 5 is a partially developed view showing a tread pattern of a recycled tire according to a second embodiment of the present invention.
【図６】図５の再生タイヤの半断面図である。FIG. 6 is a half sectional view of the recycled tire of FIG. 5;
１ 台タイヤ ２ クッションゴム ３ プレキュアトレッド ５ａ〜５ｆ リブ ７ａ，７ｂ 成形粗面 1 tire 2 cushion rubber 3 precured tread 5a-5f rib 7a, 7b molded rough surface
Claims (4)
プレキュアトレッドにおいて、台タイヤに対する接着表
面に凹凸からなる成形粗面を形成し、前記トレッドパタ
ーンに基づく高発熱領域における前記成形粗面の凹凸の
深さを該高発熱領域以外の領域よりも深くしたプレキュ
アトレッド。1. A belt-shaped pre-cured tread having a tread pattern on a tread surface, wherein a molded rough surface having irregularities is formed on an adhesive surface with respect to a base tire, and irregularities of the molded rough surface in a high heat generation region based on the tread pattern are formed. Precured tread in which the depth is deeper than the area other than the high heat generation area.
する帯状のプレキュアトレッドにおいて、台タイヤに対
する接着表面に凹凸からなる成形粗面を形成し、両ショ
ルダー部における前記成形粗面の凹凸の深さを該両ショ
ルダー部以外の領域よりも深くしたプレキュアトレッ
ド。2. A strip-shaped precured tread having a rib-based tread pattern on a tread surface, wherein a molded rough surface formed of irregularities is formed on an adhesive surface to a base tire, and the depth of the irregularities of the molded rough surface in both shoulder portions is defined. The pre-cure tread is made deeper than the region other than the shoulder portions.
する帯状のプレキュアトレッドにおいて、台タイヤに対
する接着表面に凹凸からなる成形粗面を形成し、センタ
ー部における前記成形粗面の凹凸の深さを該センター部
以外の領域よりも深くしたプレキュアトレッド。3. A strip-shaped precured tread having a lug-based tread pattern on a tread surface, wherein a molded rough surface formed of irregularities is formed on an adhesive surface to a base tire, and a depth of the irregularities of the molded rough surface at a center portion is determined. Precured tread deeper than the area other than the center.
レキュアトレッドを、接着用のクッションゴムを介して
台タイヤの外周面に貼り付け、前記クッションゴムとし
て前記プレキュアトレッドを構成するゴムよりも発熱性
が低いゴムを使用した再生タイヤ。4. The precured tread according to any one of claims 1 to 3 is attached to an outer peripheral surface of a base tire via an adhesive cushion rubber, and the precured tread is formed as the cushion rubber. Recycled tires using rubber with lower heat build-up than rubber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8294118A JPH10129216A (en) | 1996-11-06 | 1996-11-06 | Precure tread and recapped tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8294118A JPH10129216A (en) | 1996-11-06 | 1996-11-06 | Precure tread and recapped tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10129216A true JPH10129216A (en) | 1998-05-19 |
Family
ID=17803532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8294118A Pending JPH10129216A (en) | 1996-11-06 | 1996-11-06 | Precure tread and recapped tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10129216A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100509186B1 (en) * | 2002-11-19 | 2005-08-17 | 한국타이어 주식회사 | Pneumatic tire having improved durability |
| WO2009016971A1 (en) | 2007-07-27 | 2009-02-05 | Bridgestone Corporation | Tread for retreaded tire and retreaded tire |
| JP2009269423A (en) * | 2008-05-01 | 2009-11-19 | Yokohama Rubber Co Ltd:The | Tread for retreaded tire, and retreaded tire using the same |
| JP2011218906A (en) * | 2010-04-07 | 2011-11-04 | Yokohama Rubber Co Ltd:The | Retreaded tire and method of manufacturing the same |
| JP2012096762A (en) * | 2010-11-05 | 2012-05-24 | Bridgestone Corp | Retreaded tire |
| WO2012114775A1 (en) | 2011-02-25 | 2012-08-30 | 株式会社ブリヂストン | Tire, tread for retread tire, method for manufacturing same, retread tire comprising tread, and method for manufacturing same |
| JP2012176539A (en) * | 2011-02-25 | 2012-09-13 | Bridgestone Corp | Method of manufacturing precure tread |
| JP2013119281A (en) * | 2011-12-06 | 2013-06-17 | Yokohama Rubber Co Ltd:The | Precure tread and precure retreaded tire |
| JP2013252839A (en) * | 2012-06-08 | 2013-12-19 | Yokohama Rubber Co Ltd:The | Precure retreaded tire |
| JP2013256232A (en) * | 2012-06-13 | 2013-12-26 | Yokohama Rubber Co Ltd:The | Retreaded tire |
-
1996
- 1996-11-06 JP JP8294118A patent/JPH10129216A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100509186B1 (en) * | 2002-11-19 | 2005-08-17 | 한국타이어 주식회사 | Pneumatic tire having improved durability |
| WO2009016971A1 (en) | 2007-07-27 | 2009-02-05 | Bridgestone Corporation | Tread for retreaded tire and retreaded tire |
| JP2009269423A (en) * | 2008-05-01 | 2009-11-19 | Yokohama Rubber Co Ltd:The | Tread for retreaded tire, and retreaded tire using the same |
| JP2011218906A (en) * | 2010-04-07 | 2011-11-04 | Yokohama Rubber Co Ltd:The | Retreaded tire and method of manufacturing the same |
| JP2012096762A (en) * | 2010-11-05 | 2012-05-24 | Bridgestone Corp | Retreaded tire |
| WO2012114775A1 (en) | 2011-02-25 | 2012-08-30 | 株式会社ブリヂストン | Tire, tread for retread tire, method for manufacturing same, retread tire comprising tread, and method for manufacturing same |
| JP2012176539A (en) * | 2011-02-25 | 2012-09-13 | Bridgestone Corp | Method of manufacturing precure tread |
| US10059070B2 (en) | 2011-02-25 | 2018-08-28 | Bridgestone Corporation | Tire, tread for retread tire, method for manufacturing the tread for retread tire, retread tire having the tread for retread tire, and method for manufacturing the retread tire |
| JP2013119281A (en) * | 2011-12-06 | 2013-06-17 | Yokohama Rubber Co Ltd:The | Precure tread and precure retreaded tire |
| JP2013252839A (en) * | 2012-06-08 | 2013-12-19 | Yokohama Rubber Co Ltd:The | Precure retreaded tire |
| JP2013256232A (en) * | 2012-06-13 | 2013-12-26 | Yokohama Rubber Co Ltd:The | Retreaded tire |
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