JP2012139836A - Method of manufacturing retreaded tire - Google Patents

Method of manufacturing retreaded tire Download PDF

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JP2012139836A
JP2012139836A JP2010292336A JP2010292336A JP2012139836A JP 2012139836 A JP2012139836 A JP 2012139836A JP 2010292336 A JP2010292336 A JP 2010292336A JP 2010292336 A JP2010292336 A JP 2010292336A JP 2012139836 A JP2012139836 A JP 2012139836A
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tire
tread
vulcanization
groove
air
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JP5596533B2 (en
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Nobuyoshi Mikamo
信義 三鴨
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Bridgestone Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a method for manufacturing a retreaded tire with a required performance by forming a desired tread pattern.SOLUTION: The method for manufacturing a retreaded tire includes: winding precure tread on the crown of the tire via an uncured cushion rubber to form a shaped tire; vulcanizing the shaped tire; and vulcanization-bonding the precure tread by vulcanizing the treaded tire. The circumferential ends of the precure tread are connected to each other via the unvulcanized cushion rubber. A stuffing member having an air-permeable part covering the precure tread and having air permeability and protrusions arranged on the air-permeable part and fitting to the shape of grooves included in the connection part is arranged with the protrusions fitted to the grooves included in the connection part to apply post-vulcanization by putting a vulcanization envelope for covering the stuffing member.

Description

本発明は、台タイヤのクラウン部に未加硫のクッションゴムを介して加硫済みのプレキュアトレッドを巻回して配設し成形済みタイヤを形成した後、該成形済みタイヤに加硫処理を施すことによって前記プレキュアトレッドを前記台タイヤに加硫接着する更生タイヤの製造方法に関するものである。   In the present invention, a vulcanized precured tread is wound around a crown portion of a base tire via an unvulcanized cushion rubber to form a molded tire, and then the molded tire is vulcanized. It is related with the manufacturing method of the retreaded tire which vulcanize-bonds the said precure tread to the said base tire by giving.

空気入りタイヤの更生に関しては、パターンが付されていない未加硫のトレッドゴムを台タイヤに貼り付け、金型に入れて加硫するとともにパターンを付すリモールド方式（ホット更生方式）と、金型を使用せず加硫済みのパターン付きプレキュアトレッドを台タイヤに貼り付け、加硫缶の中で加硫するプレキュア方式（コールド更生方式）が知られている。   Regarding the rehabilitation of pneumatic tires, unmolded tread rubber with no pattern is attached to the base tire, vulcanized in a mold and remolded (hot retreading) with a pattern, and mold There is known a precure method (cold rehabilitation method) in which a vulcanized precured tread with a vulcanized pattern is attached to a base tire without vulcanization and vulcanized in a vulcanizing can.

コールド更生方式では、図１に示すように、台タイヤ１のクラウン部に未加硫のクッショクゴム２を配設し、そのクッションゴム２の上に加硫済みのパターン付きプレキュアトレッド３を貼り付けた後、加硫エンベロープ４をタイヤに被せてから、加硫缶５に入れて加硫を行なう。加硫缶５内の圧力を５〜７ｋｇ／ｃｍ２程度に、雰囲気温度を１００〜１３０℃程度にして約２〜５時間保持することによってトレッドゴムを台タイヤに密着させる。この方式によれば加硫缶の処理温度が比較的低いので台タイヤをいためる度合いが少なく、タイヤの更生においてはこの方式が広く採用されている。
また、加硫缶を用いず、加硫エンベロープ内の圧力を制御して台タイヤとクッショクゴムを密着させながら加硫を行う方法も提案されている（例えば特許文献１）。 In the cold rehabilitation system, as shown in FIG. 1, an unvulcanized cushion rubber 2 is disposed on the crown portion of the base tire 1, and a vulcanized patterned precure tread 3 is pasted on the cushion rubber 2 After that, the vulcanization envelope 4 is put on the tire and then placed in the vulcanization can 5 for vulcanization. The tread rubber is brought into close contact with the base tire by maintaining the pressure in the vulcanizing can 5 at about 5 to 7 kg / cm 2 and the ambient temperature at about 100 to 130 ° C. for about 2 to 5 hours. According to this method, since the treatment temperature of the vulcanizing can is relatively low, the degree of damage to the base tire is small, and this method is widely used for tire regeneration.
There has also been proposed a method of vulcanizing without using a vulcanizing can and controlling the pressure in the vulcanizing envelope to bring the base tire and the cushion rubber into close contact (for example, Patent Document 1).

特開平５−１５４９４０号公報JP-A-5-154940

しかしながら、上述したコールド更生方法では、プレキュアトレッドのジョイント部の溝が所期した形状にならないという問題が生じていた。すなわち、図２に示すように、プレキュアトレッド３は台タイヤ１上に巻回して配設されるため、プレキュアトレッド３の周方向端部同士が接続されるジョイント部Ｊが存在する。図２におけるＡ−Ａ断面図を図３に示し、図３を用いてジョイント部Ｊの溝に生ずる問題について説明する。
図３（ａ）に示すように、プレキュアトレッド３のジョイント部Ｊに接着剤としてのクッションゴム２を挟み、加硫エンベロープ４をタイヤに被せた後、タイヤを加硫缶５に入れて圧力Ｐで加硫を行なう。このとき、エンベロープ４は溝３ａの内面に密着していないので、溝３ａの内面には圧力Ｐがかかっていない。それゆえ、クッションゴム２が加硫されると、図３（ｂ）に示すように、クッションゴム２の一部２ｐは溝３ａ内に押し出され、溝３ａを一部塞いでしまう。
このように、ジョイント部Ｊの溝３ａの内部に押し出し部２ｐが形成されると、タイヤの外観を損なうだけでなく、溝の形状によって達成するはずのノイズ低減効果および排水性能などの所期した性能を発揮できないおそれがあった。 However, the above-described cold rehabilitation method has a problem that the groove of the joint portion of the precure tread does not have the desired shape. That is, as shown in FIG. 2, since the precure tread 3 is wound around the base tire 1, there is a joint portion J where the circumferential ends of the precure tread 3 are connected to each other. FIG. 3 is a cross-sectional view taken along the line AA in FIG. 2, and the problem that occurs in the groove of the joint portion J will be described with reference to FIG.
As shown in FIG. 3A, the cushion rubber 2 as an adhesive is sandwiched between the joint J of the precure tread 3 and the vulcanization envelope 4 is put on the tire, and then the tire is put in the vulcanization can 5 and pressure is applied. V is vulcanized. At this time, since the envelope 4 is not in close contact with the inner surface of the groove 3a, no pressure P is applied to the inner surface of the groove 3a. Therefore, when the cushion rubber 2 is vulcanized, as shown in FIG. 3B, a part 2p of the cushion rubber 2 is pushed into the groove 3a and partially closes the groove 3a.
Thus, when the extruded portion 2p is formed inside the groove 3a of the joint portion J, not only the appearance of the tire is impaired, but also the noise reduction effect and drainage performance that should be achieved by the shape of the groove are expected. There was a possibility that performance could not be demonstrated.

上記の問題を解決するものとして、本出願人は先に、「台タイヤのクラウン部に未加硫のクッションゴムを介して加硫済みのプレキュアトレッドを巻回して配設し成形済みタイヤを形成した後、該成形済みタイヤに加硫処理を施すことによってプレキュアトレッドを台タイヤに加硫接着する更生タイヤの製造方法であって、プレキュアトレッドの周方向端部同士を、未加硫のクッションゴムを介して接続し、当該接続部（ジョイント部）に含まれる溝に、溝の形状に嵌合する詰め部材を挿入し、次いで、プレキュアトレッドを覆う加硫エンベロープを被せた後加硫処理を施すことを特徴とする更生タイヤの製造方法」を開発し、特願２００９−１８２５４２号明細書において提案した。
この技術により、ジョイント部の溝の形状を所期した通りに形成できるので、所望のトレッドパターンを形成し、所期した性能を達成する更生タイヤの製造方法を提供することができる。 In order to solve the above problem, the present applicant has previously stated that "a vulcanized precure tread is wound around a crown portion of a base tire via an unvulcanized cushion rubber, and a molded tire is disposed. A retreaded tire manufacturing method in which a precured tread is vulcanized and bonded to a base tire by vulcanizing the formed tire after forming, and the circumferential ends of the precured tread are unvulcanized. Is inserted into the groove included in the connecting portion (joint portion), and a filling member that fits into the shape of the groove is inserted. A method for producing a retreaded tire characterized by performing a sulfur treatment ”was developed and proposed in Japanese Patent Application No. 2009-182542.
With this technique, since the groove shape of the joint portion can be formed as expected, it is possible to provide a method for manufacturing a retread tire that forms a desired tread pattern and achieves the desired performance.

ところが、上記した特願２００９−１８２５４２号明細書に提案の更生タイヤの製造方法では、ジョイント部に含まれる溝に詰め部材を挿入する工程が必要となり、作業工程数が増加して生産効率が低下するといった問題点が考えられた。
そこで、本発明は、上記した特願２００９−１８２５４２号明細書に提案の更生タイヤの製造方法の生産効率を向上することを目的とする。 However, in the method for manufacturing a retread tire proposed in the above-mentioned Japanese Patent Application No. 2009-182542, a process of inserting a stuffing member into a groove included in the joint portion is required, resulting in an increase in the number of work processes and a decrease in production efficiency. The problem of doing was considered.
Therefore, an object of the present invention is to improve the production efficiency of the method for manufacturing a retread tire proposed in the above-mentioned Japanese Patent Application No. 2009-182542.

本発明の要旨は、以下のとおりである。
（１）台タイヤのクラウン部に未加硫のクッションゴムを介して加硫済みのプレキュアトレッドを巻回して配設し成形済みタイヤを形成した後、該成形済みタイヤに加硫処理を施すことによって前記プレキュアトレッドを前記台タイヤに加硫接着する更生タイヤの製造方法において、
前記プレキュアトレッドの周方向端部同士を、未加硫のクッションゴムを介して接続し、
前記プレキュアトレッドを覆う空気透過可能な空気透過部と、前記空気透過部に設けた、前記接続部に含まれる溝の形状に嵌合する凸部と、を有する詰め部材を、前記凸部を当該接続部に含まれる溝に嵌合させて配置し、
前記詰め部材を覆う加硫エンベロープを被せた後加硫処理を施す、
ことを特徴とする更生タイヤの製造方法。 The gist of the present invention is as follows.
(1) A vulcanized pre-cured tread is wound around a crown portion of a base tire via an unvulcanized cushion rubber to form a molded tire, and then the molded tire is vulcanized. In the method for producing a retread tire in which the precure tread is vulcanized and bonded to the base tire,
The circumferential ends of the precure treads are connected via an unvulcanized cushion rubber,
A stuffing member having an air permeable portion that covers the precure tread and an air permeable portion that is permeable to the air, and a convex portion that is provided in the air permeable portion and fits in the shape of a groove included in the connection portion, Place it in the groove included in the connection part,
Applying a vulcanization envelope after covering a vulcanization envelope covering the filling member,
The manufacturing method of the retreaded tire characterized by the above-mentioned.

（２）前記空気透過部はシート状であることを特徴とする上記（１）に記載の更生タイヤの製造方法。 (2) The method for manufacturing a retread tire according to (1), wherein the air permeable portion is in a sheet form.

（３）前記接続部における前記空気透過部のタイヤ幅方向端部は、トレッド端より幅方向外側に延在し、
前記接続部以外における前記空気透過部のタイヤ幅方向端部は、トレッド端より幅方向内側に延在する、
ことを特徴とする上記（１）または（２）に記載の更生タイヤの製造方法。 (3) The tire width direction end portion of the air permeable portion in the connection portion extends outward in the width direction from the tread end,
The tire width direction end portion of the air permeable portion other than the connection portion extends inward in the width direction from the tread end.
The method for producing a retread tire according to the above (1) or (2), wherein

本発明によれば、所望のトレッドパターンを形成し、所期した性能を達成するとともに生産効率を向上させた更生タイヤの製造方法を提供することができる。   ADVANTAGE OF THE INVENTION According to this invention, the manufacturing method of the retreaded tire which formed the desired tread pattern, achieved the desired performance, and improved production efficiency can be provided.

コールド更生方式を説明するための図である。It is a figure for demonstrating a cold rebirth system. プレキュアトレッドのジョイント部を説明するための図である。It is a figure for demonstrating the joint part of a precure tread. 従来のコールド更生方式を説明するための図である。It is a figure for demonstrating the conventional cold rebirth system. 本発明の更生タイヤの製造方法を説明するための図である。It is a figure for demonstrating the manufacturing method of the retreaded tire of this invention. 本発明の更生タイヤの製造方法に用いる詰め部材の断面斜視図である。It is a cross-sectional perspective view of the filling member used for the manufacturing method of the retreaded tire of this invention. タイヤのトレッドパターンと、溝に嵌合する凸部の一例を示す図である。It is a figure which shows an example of the tread pattern of a tire, and the convex part fitted to a groove | channel.

以下、本発明の更生タイヤの製造方法を、図面を参照して詳しく説明する。
まず、プレキュアトレッド３のジョイント部（接続部）に接着剤としてのクッションゴム２を挟み、プレキュアトレッド３の周方向端部同士を接続する。図４（ａ）にジョイント部の断面図を示すように、プレキュアトレッド３に４本の周方向溝に連続する溝３ａが形成されている場合を例として説明する。ジョイント部では、プレキュアトレッド３の周方向一端の溝３ａと、他端の溝３ａとが接続されている。ここで、ジョイント部において、クッションゴム２の一部が溝３ａ内にはみ出している場合、このはみ出したクッションゴムを切り取り、押し込み棒などで溝３ａの表面（溝壁および溝底）を平らにする。
次に、図４（ｂ）に示すように、ジョイント部の溝３ａの形状に嵌合する、すなわち、溝３ａにフィットする凸部１０ａと、空気透過可能なシート状の空気透過部１０ｂと、を有する詰め部材１０を、４つの凸部１０ａがそれぞれ４本の溝３ａに嵌合するように配置する。
次に、図４（ｃ）に示すように、加硫エンベロープ４をタイヤに被せ、加硫缶５に入れて圧力Ｐ（６ｋｇ／ｃｍ２）で加硫を行なう。加硫エンベロープ４は一方のビード部から他方のビード部までの間の全域にわたって配置され、エンベロープシーリングエリア（図中円Ｂで示す）において、アークシステム６によって担持されている。また、加硫エンベロープ４はバキュームポンプ（図示省略）につながる給排気管４ａを有し、加硫エンベロープ４内の圧力を調節することができる。ここで、加硫エンベロープ４をタイヤに被せた後、タイヤに密着するように、給排気管４ａを介して、加硫エンベロープ４内の空気を抜く。
溝３ａに凸部１０ａが挿入されているので、加硫エンベロープ４にかかる圧力Ｐは、凸部１０ａを介して溝３ａの内面にもかかる。それゆえ、加硫時にプレキュアトレッドの陸部３ｂと同様に溝３ａの内面にも圧力をＰがかかることとなる。すると、上述したような、クッションゴムが溝３ａ内に流出して押し出し部を形成するという問題が発生するのを防止することができる。その結果、外観を損なうことがない上、溝３ａによってノイズ低減効果および排水性能等の所期した性能を発揮することができる。さらに、溝３ａ毎に個別に凸部１０ａを挿入する場合に比べて、本発明の詰め部材１０を凸部１０ａと空気透過部１０ｂとから構成することによって、効率よく溝３ａ毎に凸１０ａ部を配置することができる。 Hereinafter, the manufacturing method of the retreaded tire of this invention is demonstrated in detail with reference to drawings.
First, the cushion rubber 2 as an adhesive is sandwiched between the joint portions (connection portions) of the precure tread 3, and the circumferential ends of the precure tread 3 are connected to each other. As shown in a sectional view of the joint portion in FIG. 4A, a case where grooves 3a continuous to four circumferential grooves are formed in the precure tread 3 will be described as an example. In the joint portion, the groove 3a at one end in the circumferential direction of the precure tread 3 and the groove 3a at the other end are connected. Here, when a part of the cushion rubber 2 protrudes into the groove 3a at the joint portion, the protruding cushion rubber is cut out and the surface (the groove wall and the groove bottom) of the groove 3a is flattened with a push rod or the like. .
Next, as shown in FIG.4 (b), it fits in the shape of groove 3a of a joint part, ie, convex part 10a which fits into groove 3a, sheet-like air permeation part 10b which can permeate air, The stuffing member 10 having the above is arranged so that the four convex portions 10a are fitted in the four grooves 3a, respectively.
Next, as shown in FIG.4 (c), the vulcanization envelope 4 is covered on a tire, it puts into the vulcanizing can 5, and vulcanization | cure is performed with the pressure P (6 kg / cm < 2 >). The vulcanization envelope 4 is arranged over the entire area from one bead portion to the other bead portion, and is carried by an arc system 6 in an envelope sealing area (indicated by a circle B in the figure). Further, the vulcanization envelope 4 has an air supply / exhaust pipe 4a connected to a vacuum pump (not shown), and the pressure in the vulcanization envelope 4 can be adjusted. Here, after the vulcanization envelope 4 is put on the tire, the air in the vulcanization envelope 4 is removed through the air supply / exhaust pipe 4a so as to be in close contact with the tire.
Since the convex portion 10a is inserted into the groove 3a, the pressure P applied to the vulcanization envelope 4 is also applied to the inner surface of the groove 3a via the convex portion 10a. Therefore, pressure is applied to the inner surface of the groove 3a as well as the land portion 3b of the precure tread during vulcanization. Then, as described above, it is possible to prevent the problem that the cushion rubber flows out into the groove 3a to form an extruded portion. As a result, the appearance is not impaired, and the groove 3a can exhibit expected performance such as noise reduction effect and drainage performance. Furthermore, compared with the case where the convex portion 10a is inserted individually for each groove 3a, the stuffing member 10 of the present invention is configured by the convex portion 10a and the air transmitting portion 10b, so that the convex 10a portion is efficiently provided for each groove 3a. Can be arranged.

図５は、ジョイント部Ｊにおける詰め部材１０の断面斜視図である。ジョイント部Ｊにおいて、空気透過部１０ｂのプレキュアトレッドに接する側に、４つの凸部１０ａが設けられている。また、ジョイント部の空気透過部１０ｂのタイヤ幅方向端部１０Ｅ１は、トレッド端より幅方向外側、すなわち、タイヤショルダー部に延在することが好ましい。このように、空気透過部１０ｂをタイヤショルダー部に延在させることによって、凸部１０ａと溝３ａとの位置合わせを容易にするとともに、詰め部材１０がタイヤ幅方向に動くことを防止することができる。
凸部１０ａのタイヤ周方向の長さＷは、１０ｍｍ以上３０ｍｍ以下であることが好ましい。
長さＷが１０ｍｍ未満の場合、ジョイント部Ｊのクッションゴム２が溝３ａ内に押し出されるのを十分に防ぐことができないおそれがあり、一方、長さＷが３０ｍｍ超の場合、不必要な凸部が溝３ａ内に存在するため、加硫時の熱の伝わりが凸部１０ａによって妨げられるおそれがあるためである。 FIG. 5 is a cross-sectional perspective view of the filling member 10 in the joint portion J. FIG. In the joint portion J, four convex portions 10a are provided on the side of the air transmitting portion 10b that contacts the precure tread. Moreover, it is preferable that the tire width direction end portion 10E1 of the air permeable portion 10b of the joint portion extends to the outer side in the width direction from the tread end, that is, the tire shoulder portion. Thus, by extending the air permeable portion 10b to the tire shoulder portion, it is possible to facilitate the alignment of the convex portion 10a and the groove 3a and to prevent the filling member 10 from moving in the tire width direction. it can.
The length W of the convex portion 10a in the tire circumferential direction is preferably 10 mm or more and 30 mm or less.
If the length W is less than 10 mm, the cushion rubber 2 of the joint portion J may not be sufficiently prevented from being pushed into the groove 3a. On the other hand, if the length W is more than 30 mm, unnecessary protrusions may occur. This is because the heat transfer during vulcanization may be hindered by the convex portion 10a because the portion exists in the groove 3a.

ジョイント部Ｊ以外の領域Ｋでは、空気透過部１０ｂのプレキュアトレッドに接する側に凸部１０ａが設けられていないことが好ましい。ジョイント部Ｊ以外の領域Ｋでは、クッションゴムが溝を塞ぐ問題は生じない上、加硫時の熱の伝わりが凸部１０ａによって妨げられることを防止するためである。また、領域Ｋにおける空気透過部１０ｂのタイヤ幅方向端部１０Ｅ２は、トレッド端より幅方向内側に延在することが好ましい。これは、領域Ｋの空気透過部１０ｂをタイヤショルダー部に延在させると、詰め部材１０をプレキュアトレッド上にはめ込みにくい等の製造上の不具合が生ずるためである。   In the region K other than the joint portion J, it is preferable that the convex portion 10a is not provided on the side in contact with the precure tread of the air transmitting portion 10b. This is because in the region K other than the joint portion J, the problem that the cushion rubber blocks the groove does not occur, and the heat transfer during vulcanization is prevented from being hindered by the convex portion 10a. Moreover, it is preferable that the tire width direction end portion 10E2 of the air permeable portion 10b in the region K extends inward in the width direction from the tread end. This is because if the air permeable portion 10b in the region K is extended to the tire shoulder portion, a manufacturing defect such as difficulty in fitting the filling member 10 on the precure tread occurs.

詰め部材１０の空気透過部１０ｂは、加硫エンベロープと台タイヤとで区画形成された空間内の空気を加硫エンベロープの排気口から円滑に吸引するために用いられる。
詰め部材１０の空気透過部１０ｂを用いない場合、加硫エンベロープ内の空気を吸引するにつれて、プレキュアトレッドと加硫エンベロープとは密着し始める。このとき、プレキュアトレッドに設けた溝（例えば、ヘルムホルツ型共鳴器のような狭窄溝を介して周方向溝に開口する幅方向溝）を囲む陸部が加硫エンベロープと密着すると、その幅方向溝と加硫エンベロープとが閉空間を形成するため、その幅方向溝内の空気は加硫エンベロープ外に排出されなくなる。すると、加硫エンベロープ内の圧力を所期した程度まで高めることができず、プレキュアトレッドを台タイヤに対して所定の力で押圧することができなくなる。その結果、クッションゴムと台タイヤまたはクッションゴムとプレキュアトレッドとの間に非接着部分が存在するという問題が生ずる。
また、詰め部材１０の空気透過部１０ｂを用いない場合、加硫エンベロープの排気口近傍の領域が、プレキュアトレッドに密着すると、やはり、加硫エンベロープ内の空気の吸引を円滑に行えないという問題が生ずる。
そこで、詰め部材１０の空気透過部１０ｂをプレキュアトレッドを覆うように配置することによって、加硫エンベロープ内の空気を排気口から円滑に吸引することができる。 The air permeable portion 10b of the stuffing member 10 is used to smoothly suck the air in the space defined by the vulcanization envelope and the base tire from the exhaust port of the vulcanization envelope.
When not using the air permeation | transmission part 10b of the stuffing member 10, as the air in a vulcanization envelope is attracted | sucked, a precure tread and a vulcanization envelope begin to closely_contact | adhere. At this time, when the land portion surrounding the groove provided in the precure tread (for example, the widthwise groove opened to the circumferential groove via the narrowed groove such as a Helmholtz resonator) closely contacts the vulcanization envelope, the width direction Since the groove and the vulcanization envelope form a closed space, the air in the widthwise groove is not discharged outside the vulcanization envelope. Then, the pressure in the vulcanization envelope cannot be increased to an expected level, and the precure tread cannot be pressed against the base tire with a predetermined force. As a result, there arises a problem that a non-bonded portion exists between the cushion rubber and the base tire or between the cushion rubber and the precure tread.
Further, when the air permeable portion 10b of the filling member 10 is not used, if the region near the exhaust port of the vulcanization envelope is in close contact with the precure tread, the air in the vulcanization envelope cannot be sucked smoothly. Will occur.
Therefore, by arranging the air permeable portion 10b of the filling member 10 so as to cover the precure tread, the air in the vulcanization envelope can be smoothly sucked from the exhaust port.

なお、詰め部材１０を加硫エンベロープにあらかじめ取り付けておくこともできる。この場合、詰め部材１０をプレキュアトレッド上に配置する工程と、加硫エンベロープを被せる工程を同時に行えるため、更なる作業効率の向上を図ることができる。   In addition, the filling member 10 can also be previously attached to the vulcanization envelope. In this case, since the step of placing the filling member 10 on the precure tread and the step of covering the vulcanized envelope can be performed at the same time, the work efficiency can be further improved.

詰め部材１０は、凸部１０ａおよび空気透過部１０ｂをともにシリコンゴムから製造し、空気透過部１０ｂに空気透過用の孔を設けることによって構成することができる。あるいは、詰め部材１０は、凸部１０ａを空気が透過しない材料、例えばゴム、樹脂、金属から製造し、空気透過部１０ｂを空気透過可能な不織布などの繊維体から製造することによって構成することもできる。   The stuffing member 10 can be configured by manufacturing both the convex portion 10a and the air permeable portion 10b from silicon rubber, and providing an air permeable hole in the air permeable portion 10b. Alternatively, the filling member 10 may be configured by manufacturing the convex portion 10a from a material that does not allow air to permeate, such as rubber, resin, or metal, and manufacturing the air permeable portion 10b from a fibrous body such as a non-woven fabric that can transmit air. it can.

なお、上述した例ではタイヤ周方向に連続する周方向溝３ａを例として説明したが、プレキュアトレッドに形成される溝は周方向溝に限定されることはなく、任意のパターンとすることができる。
例えば、図６にタイヤのトレッドパターンと、溝に嵌合する凸部の一例を示すように、溝３ａ１に対しては、ジョイント部Ｊを跨る凸部１０ａ１を設ける。また、ジョイント部Ｊに接する溝３ａ２に対しては、ジョイント部Ｊに接する凸部１０ａ２を設けることが好ましい。なお、ジョイント部Ｊに開口しない溝３ａ２に対しては、凸部を設ける必要はない。 In the above-described example, the circumferential groove 3a continuous in the tire circumferential direction is described as an example. However, the groove formed in the precure tread is not limited to the circumferential groove, and may be an arbitrary pattern. it can.
For example, as shown in FIG. 6 showing an example of a tire tread pattern and a convex portion that fits into the groove, a convex portion 10a1 that straddles the joint portion J is provided for the groove 3a1. Further, for the groove 3a2 in contact with the joint portion J, it is preferable to provide a convex portion 10a2 in contact with the joint portion J. In addition, it is not necessary to provide a convex portion for the groove 3a2 that does not open in the joint portion J.

また、加硫エンベロープについて、一方のビード部から他方のビード部までの間の全域にわたって配置され、エンベロープシーリングエリアにおいて、アークシステム６によって担持されている例を説明したが、加硫エンベロープは、この形態に限定されることはない。
例えば、タイヤの外面部にアウターエンベロープを、タイヤの内面部にインナーエンベロープをそれぞれ配置するとともに、これらエンベロープの各両端部を互いに係止することにより内部の気密を保持する加硫エンベロープを用いることもできる。
あるいは、タイヤの外面部にアウターエンベロープを、タイヤの内部に膨張可能なチューブをそれぞれ配置するとともに、該エンベロープの各端部をリムとタイヤの各ビード部との間に挟み込むことによりエンベロープ内部の気密を保持する加硫エンベロープを用いることもできる。
これらの方法は、主に加硫時のタイヤ形状保持のためにタイヤの内面部に圧力を付加する際、かかる内面部に修理箇所があり直接そこに圧力を付加することができない場合に用いられる。 Moreover, about the vulcanization envelope, it has been arranged over the entire region from one bead portion to the other bead portion, and in the envelope sealing area, the example that is supported by the arc system 6 has been described. The form is not limited.
For example, an outer envelope may be disposed on the outer surface portion of the tire, and an inner envelope may be disposed on the inner surface portion of the tire, and a vulcanized envelope that maintains the internal airtightness by locking each end portion of these envelopes may be used. it can.
Alternatively, an outer envelope is disposed on the outer surface portion of the tire, and an inflatable tube is disposed inside the tire, and each end portion of the envelope is sandwiched between the rim and each bead portion of the tire so that the airtightness inside the envelope is increased. It is also possible to use a vulcanization envelope that holds
These methods are mainly used when pressure is applied to the inner surface of the tire to maintain the tire shape during vulcanization, and there is a repair location on the inner surface that cannot be directly applied. .

１ 台タイヤ
２ クッションゴム
３ プレキュアトレッド
３ａ 溝
３ｂ 陸部
４ 加硫エンベロープ
４ａ 給排気管
５ 加硫缶
６ アークシステム
１０ 詰め部材
１０ａ 凸部
１０ｂ 空気透過部
1 tire 2 cushion rubber 3 precure tread 3a groove 3b land part 4 vulcanization envelope 4a air supply / exhaust pipe 5 vulcanization can 6 arc system 10 filling member 10a convex part 10b air transmission part

Claims (3)

台タイヤのクラウン部に未加硫のクッションゴムを介して加硫済みのプレキュアトレッドを巻回して配設し成形済みタイヤを形成した後、該成形済みタイヤに加硫処理を施すことによって前記プレキュアトレッドを前記台タイヤに加硫接着する更生タイヤの製造方法において、
前記プレキュアトレッドの周方向端部同士を、未加硫のクッションゴムを介して接続し、
前記プレキュアトレッドを覆う空気透過可能な空気透過部と、前記空気透過部に設けた、前記接続部に含まれる溝の形状に嵌合する凸部と、を有する詰め部材を、前記凸部を当該接続部に含まれる溝に嵌合させて配置し、
前記詰め部材を覆う加硫エンベロープを被せた後加硫処理を施す、
ことを特徴とする更生タイヤの製造方法。 The vulcanized precure tread is wound around the crown portion of the base tire via a cushion rubber to form a molded tire, and then the molded tire is subjected to vulcanization treatment. In a method for producing a retread tire in which precure tread is vulcanized and bonded to the base tire,
The circumferential ends of the precure treads are connected via an unvulcanized cushion rubber,
A stuffing member having an air permeable portion that covers the precure tread and an air permeable portion that is permeable to the air, and a convex portion that is provided in the air permeable portion and fits in the shape of a groove included in the connection portion, Place it in the groove included in the connection part,
Applying a vulcanization envelope after covering a vulcanization envelope covering the filling member,
The manufacturing method of the retreaded tire characterized by the above-mentioned. 前記空気透過部はシート状であることを特徴とする請求項１に記載の更生タイヤの製造方法。   The method for manufacturing a retread tire according to claim 1, wherein the air permeable portion has a sheet shape. 前記接続部における前記空気透過部のタイヤ幅方向端部は、トレッド端より幅方向外側に延在し、
前記接続部以外における前記空気透過部のタイヤ幅方向端部は、トレッド端より幅方向内側に延在する、
ことを特徴とする請求項１または２に記載の更生タイヤの製造方法。

The tire width direction end of the air permeable portion in the connection portion extends outward in the width direction from the tread end,
The tire width direction end portion of the air permeable portion other than the connection portion extends inward in the width direction from the tread end.
The manufacturing method of the retreaded tire of Claim 1 or 2 characterized by the above-mentioned.

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933551A (en) * 1973-11-30 1976-01-20 Bandag Incorporated Stabilization of tread strip during bonding to tire
JPS62261406A (en) * 1986-05-08 1987-11-13 Ohtsu Tire & Rubber Co Ltd Manufacture of reclaimed tire
JPS62278026A (en) * 1986-05-26 1987-12-02 Ohtsu Tire & Rubber Co Ltd Manufacture of retreaded tire
JPH01110135A (en) * 1987-09-21 1989-04-26 Teknor Apex Co Tire, to which pre-vulcanized tread is mounted, and manufacture thereof
JP2007331152A (en) * 2006-06-13 2007-12-27 Bridgestone Corp Tire regeneration method using precured tread

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3933551A (en) * 1973-11-30 1976-01-20 Bandag Incorporated Stabilization of tread strip during bonding to tire
JPS62261406A (en) * 1986-05-08 1987-11-13 Ohtsu Tire & Rubber Co Ltd Manufacture of reclaimed tire
JPS62278026A (en) * 1986-05-26 1987-12-02 Ohtsu Tire & Rubber Co Ltd Manufacture of retreaded tire
JPH01110135A (en) * 1987-09-21 1989-04-26 Teknor Apex Co Tire, to which pre-vulcanized tread is mounted, and manufacture thereof
JP2007331152A (en) * 2006-06-13 2007-12-27 Bridgestone Corp Tire regeneration method using precured tread

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