JP2010069828A - Processing method for tire inner surface and processing device for tire inner surface - Google Patents

Processing method for tire inner surface and processing device for tire inner surface Download PDF

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JP2010069828A
JP2010069828A JP2008242508A JP2008242508A JP2010069828A JP 2010069828 A JP2010069828 A JP 2010069828A JP 2008242508 A JP2008242508 A JP 2008242508A JP 2008242508 A JP2008242508 A JP 2008242508A JP 2010069828 A JP2010069828 A JP 2010069828A
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tire inner
tire
discharge
absorbing layer
sound absorbing
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Yusuke Araki
裕介 荒木
Akira Yoshitake
晃 吉武
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Bridgestone Corp
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Bridgestone Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
    • B29D30/00—Producing pneumatic or solid tyres or parts thereof
    • B29D30/0061—Accessories, details or auxiliary operations not otherwise provided for

Abstract

<P>PROBLEM TO BE SOLVED: To provide a processing method for tire inner surface, which improves adhesion between the tire inner surface and a sound absorbing layer without polishing the tire inner surface; and a processing device for tire inner surface, which allows conducting such a processing method. <P>SOLUTION: The processing method for the tire inner surface modifies an area of a tire inner surface 4 to which the sound absorbing layer is attached, by applying electrical discharge to the tire inner surface 4 using an electrical discharge implement 5, in the tire inner surface 4. Also, a tire inner surface modifying device 1 polishes the tire inner surface 4, wherein the tire inner surface modifying device 1 is the device which is equipped with the electrical discharge implement 5 to apply electric discharge on the tire inner surface 4. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

この発明は、タイヤ内面において、吸音層を貼付ける領域を改質させるタイヤ内面処理方法、及びかかる処理方法を実施するためのタイヤ内面処理装置に関する。   The present invention relates to a tire inner surface processing method for modifying a region where a sound absorbing layer is applied on a tire inner surface, and a tire inner surface processing apparatus for carrying out such a processing method.

一般に、リム組みして、車両に取り付けられた空気入りタイヤは、車両の走行中にトレッド部が路面の凹凸に接触して振動することによって、タイヤ内腔に充填された空気が空洞共鳴する。この空洞共鳴は、いわゆるロードノイズの主たる原因であり、その共鳴周波数の多くは１８０〜３００Ｈｚの範囲内に存在する。ロードノイズが、車室内に伝達されると、他の周波数帯域の騒音とは異なり、鋭く高いピーク値となるため、車室内の乗員にとって耳障りな騒音となる。   In general, in a pneumatic tire mounted on a vehicle by assembling a rim, the tread portion is in contact with the road surface unevenness and vibrates while the vehicle is running, so that air filled in the tire cavity resonates. This cavity resonance is a main cause of so-called road noise, and many of the resonance frequencies exist in the range of 180 to 300 Hz. When the road noise is transmitted to the vehicle interior, unlike the noise in other frequency bands, the road noise is sharp and has a high peak value, which is annoying noise for passengers in the vehicle interior.

かかる空洞共鳴を抑制し、ロードノイズを低減するため、特許文献１には、タイヤ内面に、不織布により構成される制音用の環状の吸音層をタイヤ周方向に固定した空気入りタイヤが提案されている。また、特許文献２には、スポンジ材により構成された吸音層をタイヤ内面に固定したタイヤが提案されている。
特許第３６２２９５７号明細書 特開２００３−４８４０７号公報 In order to suppress such cavity resonance and reduce road noise, Patent Document 1 proposes a pneumatic tire in which an annular sound absorbing layer for noise suppression composed of a nonwoven fabric is fixed on the tire inner surface in the tire circumferential direction. ing. Patent Document 2 proposes a tire in which a sound absorbing layer made of a sponge material is fixed to the tire inner surface.
Japanese Patent No. 3622957 JP 2003-48407 A

一般に、加硫成形後のタイヤ内面には、加硫成形時に使用される加硫用ブラダーとの離型性を確保するための、シリコンオイル等の離型剤が塗布された状態のままとなっている。離型剤が塗布された状態のタイヤ内面に、接着剤を用いて吸音層を貼り付けても、離型剤により接着剤の接着性が損なわれ、吸音層を堅固に貼り付けられないことが問題となっていた。   In general, the inner surface of the tire after vulcanization remains in a state in which a release agent such as silicone oil is applied to ensure releasability from the vulcanization bladder used during vulcanization molding. ing. Even if the sound absorbing layer is attached to the tire inner surface with the release agent applied using an adhesive, the adhesive of the adhesive is impaired by the release agent, and the sound absorbing layer may not be firmly attached. It was a problem.

上記問題を解決するために、特許文献３には、タイヤ内面処理装置の研摩具により、タイヤ内面を研摩して、離型剤を剥ぎ取り、タイヤ内面と吸音層との接着性を向上させる旨が記載されている。
特開２００７−１６８２４２号公報 In order to solve the above problem, Patent Document 3 discloses that the inner surface of the tire is polished by the polishing tool of the tire inner surface processing apparatus, the release agent is peeled off, and the adhesion between the tire inner surface and the sound absorbing layer is improved. Is described.
JP 2007-168242 A

しかし、特許文献３に記載のタイヤ内面処理装置において、タイヤ内面をどの程度の深さまで研磨するかは、タイヤ内面に対する研摩具の位置（高さ方向の位置）により制御しており、タイヤの寸法や形状に応じて、研摩具の位置を微細に制御しなければならなく、この制御が困難であることから、タイヤ内面が必要以上に研摩されてしまい、タイヤの剛性や気密性が損なわれたり、反対に、タイヤ内面が充分に研摩されずに、残存している離型剤により吸音層が有効に貼り付けられなかったりする場合がある。   However, in the tire inner surface processing apparatus described in Patent Document 3, the depth to which the tire inner surface is polished is controlled by the position of the polishing tool (position in the height direction) with respect to the tire inner surface. Depending on the shape and shape, the position of the polishing tool must be finely controlled, and this control is difficult, so the inner surface of the tire is polished more than necessary, and the rigidity and air tightness of the tire is impaired. On the contrary, the inner surface of the tire is not sufficiently polished, and the sound absorbing layer may not be effectively attached due to the remaining release agent.

そこで、この発明の目的は、上記したような問題を生じさせる虞のあるタイヤ内面の研摩を行うことなく、タイヤ内面と吸音層との接着性を向上させることを可能とするタイヤ内面処理方法を提供することにある。また、この発明の更なる目的は、かかる処理方法を実施し得るタイヤ内面処理装置を提供することにある。   Accordingly, an object of the present invention is to provide a tire inner surface treatment method capable of improving the adhesion between the tire inner surface and the sound absorbing layer without polishing the tire inner surface that may cause the above-described problems. It is to provide. Moreover, the further objective of this invention is to provide the tire inner surface processing apparatus which can implement this processing method.

前記目的を達成するため、第一発明は、タイヤ内面において、吸音層を貼付ける領域を改質させるタイヤ内面処理方法であって、タイヤ内面に放電処理を施すことを特徴とするタイヤ内面処理方法である。なお、ここでいう「放電処理」とは、処理対象に電子線を照射する、いわゆるプラズマ放電処理をいうものである。   In order to achieve the above object, the first invention is a tire inner surface treatment method for modifying a region to which a sound absorbing layer is applied on a tire inner surface, wherein the tire inner surface is subjected to a discharge treatment. It is. The “discharge treatment” here refers to a so-called plasma discharge treatment in which an electron beam is irradiated to a treatment target.

また、第一発明において、放電処理は、コロナ放電処理であることが好ましい。   In the first invention, the discharge treatment is preferably a corona discharge treatment.

第二発明は、タイヤ内面を研摩するタイヤ内面処理装置であって、かかる装置は、タイヤ内面に放電処理を施す放電具を具えることを特徴とするタイヤ内面処理装置である。   A second invention is a tire inner surface treatment apparatus for polishing an inner surface of a tire, and the apparatus includes a discharge tool for performing a discharge treatment on the tire inner surface.

また、第二発明において、放電具は、コロナ放電具であることが好ましい。   In the second invention, the discharge tool is preferably a corona discharge tool.

この発明によれば、タイヤ内面を改質させることにより、タイヤ内面を研摩することなく、タイヤ内面と吸音層との接着性を向上させることを可能とするタイヤ内面処理方法を提供することが可能となる。また、かかる処理方法を実施し得るタイヤ内面処理装置を提供することが可能となる。   According to the present invention, it is possible to provide a method for treating a tire inner surface that can improve the adhesion between the tire inner surface and the sound absorbing layer without modifying the tire inner surface by modifying the tire inner surface. It becomes. Moreover, it is possible to provide a tire inner surface processing apparatus that can carry out such a processing method.

次に、図面を参照しつつ、この発明の実施形態を説明する。図１（ａ）は、この発明に従うタイヤ内面処理装置の正面図であり、図１（ｂ）はその側面図である。図２（ａ）及び（ｂ）は、この発明に従うその他のタイヤ内面処理装置の放電具である。   Next, embodiments of the present invention will be described with reference to the drawings. Fig.1 (a) is a front view of the tire inner surface processing apparatus according to this invention, and FIG.1 (b) is the side view. 2 (a) and 2 (b) show a discharge tool of another tire inner surface treatment apparatus according to the present invention.

この発明に従うタイヤ内面処理装置１は、図１（ａ）及び（ｂ）に示すように、タイヤ２を立てた姿勢にて保持するためのローラを具えるタイヤ保持具３と、タイヤ内面４に沿って移動し、タイヤ内面４を放電処理する放電具５と、を具える（なお、装置構成を理解し易くするため、タイヤ２は全て点線にて示す）。放電具５は、高電圧を発生させる高電圧発生ユニット６、かかる高電圧発生ユニット６から送られてくる高電圧の電路を内部に有する本体部７、及び、コロナ放電する放電電極８を有するヘッド部９により構成されている。タイヤ保持具３は、タイヤ２の側面からタイヤ２を支持する側方支持具１０、及び、タイヤ２の下方からタイヤ２を支持する下方支持具１１により構成されている。側方支持具１０は、タイヤ２の左右に夫々２箇所、計４箇所設けられており、それらの間にタイヤ２を挟み込むことにより、タイヤ２を左右方向から支持する。また、下方保持具１１は、タイヤ下方にて２箇所に設けられており、タイヤ２の下方からタイヤ２を支持する。なお、タイヤ保持具３は、全てローラを具えており、かかるローラを利用して、必要に応じて、所望の速度及び回転数にて、タイヤ２を回転させることができる。また、タイヤ２をタイヤ内面処理装置に保持した後、リム孔から放電具５が挿入される。そして、放電具５を用いて、タイヤ内面４に対しコロナ放電処理を施すことで、照射対象となった部分を改質させる。   As shown in FIGS. 1A and 1B, a tire inner surface treatment apparatus 1 according to the present invention includes a tire holder 3 having a roller for holding a tire 2 in an upright posture, and a tire inner surface 4. And a discharge tool 5 that discharges the tire inner surface 4 (in order to facilitate understanding of the device configuration, the tire 2 is all indicated by a dotted line). The discharge tool 5 includes a high voltage generating unit 6 that generates a high voltage, a main body 7 that has a high voltage electric circuit sent from the high voltage generating unit 6 therein, and a discharge electrode 8 that discharges corona. It is comprised by the part 9. The tire holder 3 includes a side support 10 that supports the tire 2 from the side surface of the tire 2 and a lower support 11 that supports the tire 2 from below the tire 2. The lateral support 10 is provided at two positions on the left and right sides of the tire 2, for a total of four positions, and supports the tire 2 from the left and right directions by sandwiching the tire 2 therebetween. The lower holding tool 11 is provided at two locations below the tire, and supports the tire 2 from below the tire 2. Note that the tire holder 3 includes all rollers, and the tire 2 can be rotated at a desired speed and number of rotations as necessary using such rollers. Moreover, after holding the tire 2 in the tire inner surface treatment apparatus, the discharge tool 5 is inserted from the rim hole. And the part used as irradiation object is improved by performing the corona discharge process with respect to the tire inner surface 4 using the discharge tool 5. FIG.

これによれば、コロナ放電処理が施されたタイヤ内面部分が改質し、ぬれ特性が改善されることから、タイヤ内面４を研摩することなく、接着剤を用いた吸音層とタイヤ内面４との接着を堅固なものとすることが可能となる。なお、吸音層としては、不織布やスポンジ材等が挙げられ、そのタイヤ内面４への貼付けに使用される接着剤としては、例えば、スチレン−ブタジエンゴム系のラテックス接着剤、水性高分子−イソシアネート系の接着剤等が挙げられる。
また、上述のタイヤ内面処理装置１では、放電具５のヘッド部９は、シングルローテーションタイプのもので、処理幅が広く、表面改質性に優れたノズルを有するものを用いているが、コロナ放電の照射範囲や強度に応じて、その他のヘッド部９とすることもでき、例えば、図２に示すように、小さな範囲にコロナ放電処理を施す単一の放電電極８を有するシングルストレートタイプのヘッド部９を採用したり、図３に示すように、大きな範囲にコロナ放電を施すために複数の放電電極８を有するマルチストレートタイプのヘッド部９を採用したりできる。また、シングルローテーションタイプのヘッド部９のその他の例として、図４に示すヘッド部９としたり、あるいは、図５に示すように、ダブルローテーションタイプのヘッド部９としたりできる。 According to this, since the inner surface portion of the tire subjected to the corona discharge treatment is modified and the wetting characteristics are improved, the sound absorbing layer using the adhesive and the inner surface 4 of the tire can be used without polishing the inner surface 4 of the tire. It becomes possible to make the adhesion of the material firm. Examples of the sound absorbing layer include non-woven fabrics and sponge materials, and examples of the adhesive used for attaching to the tire inner surface 4 include a styrene-butadiene rubber latex adhesive and an aqueous polymer-isocyanate system. And the like.
Further, in the tire inner surface treatment apparatus 1 described above, the head portion 9 of the discharge tool 5 is of a single rotation type, has a wide treatment width, and has a nozzle having excellent surface modification properties. Depending on the discharge irradiation range and intensity, other head portions 9 may be used. For example, as shown in FIG. 2, a single straight type head having a single discharge electrode 8 for performing a corona discharge treatment in a small range. As shown in FIG. 3, a multi-straight type head portion 9 having a plurality of discharge electrodes 8 can be employed to perform corona discharge over a large range, as shown in FIG. As another example of the single rotation type head unit 9, the head unit 9 shown in FIG. 4 can be used, or as shown in FIG. 5, the double rotation type head unit 9 can be used.

なお、上述したところは、この発明の実施形態の一部を示したにすぎず、この発明の趣旨を逸脱しない限り、これらの構成を相互に組み合わせたり、種々の変更を加えたりすることができる。例えば、図示例ではタイヤ内面４のうち、トレッド部の内面にコロナ放電処理を施しているが、吸音層を貼り付ける位置はこれに限定されないため、吸音層を貼り付ける位置に対応させて、タイヤ内面４のうち、ショルダー部やビード部等に放電処理を施することも可能である。また、図示例では、放電具５をタイヤ周方向に移動させてタイヤ内面４を改質させているが、その他の任意の方向に移動させてタイヤ内面４を改質させることも可能である。更に、図示例では、放電具５の位置を固定した状態で、タイヤ２を回転させることにより、タイヤ内面を改質させているが、反対に、タイヤを固定した状態で、放電具５を移動させることにより、タイヤ内面４を改質させることも可能である。更にまた、上述してきた放電具５は、コロナ放電する放電具５であるが、パルスコロナ放電等のその他の方式の放電を行う放電具とすることも可能である。   Note that the above description shows only a part of the embodiment of the present invention, and these configurations can be combined with each other or various modifications can be made without departing from the gist of the present invention. . For example, in the illustrated example, a corona discharge treatment is applied to the inner surface of the tread portion of the tire inner surface 4, but the position where the sound absorbing layer is applied is not limited to this, so that the tire is made to correspond to the position where the sound absorbing layer is applied. Of the inner surface 4, it is also possible to subject the shoulder portion, the bead portion and the like to a discharge treatment. In the illustrated example, the discharge tool 5 is moved in the tire circumferential direction to modify the tire inner surface 4, but the tire inner surface 4 can be modified by moving in another arbitrary direction. Furthermore, in the illustrated example, the tire inner surface is modified by rotating the tire 2 with the position of the discharge tool 5 fixed, but on the contrary, the discharge tool 5 is moved with the tire fixed. Thus, the tire inner surface 4 can be modified. Furthermore, although the discharge tool 5 described above is a discharge tool 5 that performs corona discharge, it can also be a discharge tool that performs other types of discharge such as pulse corona discharge.

以上の説明から明らかなように、この発明によって、タイヤ内面を研摩することなく、タイヤ内面と吸音層との接着性を向上させることを可能とするタイヤ内面処理方法を提供することが可能となった。また、かかる処理方法を実施し得るタイヤ内面処理装置を提供することが可能となった。   As is apparent from the above description, according to the present invention, it is possible to provide a tire inner surface treatment method capable of improving the adhesion between the tire inner surface and the sound absorbing layer without polishing the tire inner surface. It was. It has also become possible to provide a tire inner surface treatment apparatus that can carry out such a treatment method.

（ａ）は、この発明に従うタイヤ内面処理装置の正面図であり、（ｂ）はその側面図である。(A) is the front view of the tire inner surface processing apparatus according to this invention, (b) is the side view. この発明に従うその他のタイヤ内面処理装置の放電具の斜視図である。It is a perspective view of the discharge tool of the other tire inner surface processing apparatus according to this invention. この発明に従うその他のタイヤ内面処理装置の放電具の斜視図である。It is a perspective view of the discharge tool of the other tire inner surface processing apparatus according to this invention. この発明に従うその他のタイヤ内面処理装置の放電具の斜視図である。It is a perspective view of the discharge tool of the other tire inner surface processing apparatus according to this invention. この発明に従うその他のタイヤ内面処理装置の放電具の斜視図である。It is a perspective view of the discharge tool of the other tire inner surface processing apparatus according to this invention.

符号の説明Explanation of symbols

１ タイヤ内面処理装置
２ タイヤ
３ タイヤ保持具
４ タイヤ内面
５ 放電具
６ 高電圧発生ユニット
７ 本体部
８ 放電電極
９ ヘッド部
１０ 側方支持具
１１ 下方支持具 DESCRIPTION OF SYMBOLS 1 Tire inner surface processing apparatus 2 Tire 3 Tire holder 4 Tire inner surface 5 Discharge tool 6 High voltage generation unit 7 Main-body part 8 Discharge electrode 9 Head part 10 Side support tool 11 Lower support tool

Claims (4)

タイヤ内面において、吸音層を貼付ける領域を改質させるタイヤ内面処理方法であって、
タイヤ内面に放電処理を施すことを特徴とするタイヤ内面処理方法。 In the tire inner surface, a tire inner surface treatment method for modifying a region where a sound absorbing layer is pasted,
A method for treating the inner surface of a tire, comprising subjecting the inner surface of the tire to a discharge treatment. 前記放電処理は、コロナ放電処理である、請求項１に記載のタイヤ内面処理方法。   The tire inner surface treatment method according to claim 1, wherein the discharge treatment is a corona discharge treatment. タイヤ内面を改質するタイヤ内面処理装置において、
該装置は、タイヤ内面に放電処理を施す放電具を具えることを特徴とするタイヤ内面処理装置。 In the tire inner surface treatment apparatus for modifying the tire inner surface,
The apparatus includes a discharge device that performs a discharge process on the tire inner surface. 前記放電具は、コロナ放電具である、請求項３に記載のタイヤ内面処理装置。   The tire inner surface treatment apparatus according to claim 3, wherein the discharge tool is a corona discharge tool.
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JPWO2013031165A1 (en) * 2011-08-26 2015-03-23 株式会社ブリヂストン Pneumatic tire and manufacturing method thereof
WO2016039119A1 (en) * 2014-09-12 2016-03-17 株式会社ブリヂストン Pneumatic tire
WO2020250964A1 (en) * 2019-06-11 2020-12-17 横浜ゴム株式会社 Method for cleaning tire and method for manufacturing tire
JP2020203474A (en) * 2019-06-11 2020-12-24 横浜ゴム株式会社 Method for cleaning tire and method for manufacturing tire

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