JP3999338B2 - Manufacturing method of tire with sealant - Google Patents

Manufacturing method of tire with sealant Download PDF

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Publication number
JP3999338B2
JP3999338B2 JP06538498A JP6538498A JP3999338B2 JP 3999338 B2 JP3999338 B2 JP 3999338B2 JP 06538498 A JP06538498 A JP 06538498A JP 6538498 A JP6538498 A JP 6538498A JP 3999338 B2 JP3999338 B2 JP 3999338B2
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Japan
Prior art keywords
inner liner
tire
sealant
chamber
peripheral wall
Prior art date
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Expired - Fee Related
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JP06538498A
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Japanese (ja)
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JPH11254547A (en
Inventor
登志夫 山際
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP06538498A priority Critical patent/JP3999338B2/en
Priority to TW88103531A priority patent/TW397762B/en
Priority to CO99015748A priority patent/CO5090885A1/en
Priority to MYPI9900953 priority patent/MY123006A/en
Publication of JPH11254547A publication Critical patent/JPH11254547A/en
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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
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
    • B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
    • 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
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
    • B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
    • B29D2030/0686—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre
    • B29D2030/069—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre through the use of a cylindrical support, e.g. a drum
    • 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
    • B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
    • B29D30/0681—Parts of pneumatic tyres; accessories, auxiliary operations
    • B29D30/0685—Incorporating auto-repairing or self-sealing arrangements or agents on or into tyres
    • B29D2030/0686—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre
    • B29D2030/0698—Incorporating sealants on or into tyres not otherwise provided for; auxiliary operations therefore, e.g. preparation of the tyre the sealant being applied by injection, e.g. introducing the sealant through a hole

Description

【０００１】
【発明の属する技術分野】
本発明は、トレッドの内側にインナーライナーにより区画された輪状のシール剤室を有するシール剤入りタイヤの製造方法に関する。
【０００２】
【従来の技術】
タイヤ本体のトレッドの内側に、少なくとも一部をインナーライナーにより区画されたシール剤室を形成し、釘等によるトレッドの刺傷を前記シール剤室に封入したシール剤で自封して刺傷からの空気の漏出を遅らせるようにしたシール剤入りタイヤが、特開平８−３２３８７５号公報により公知である。
【０００３】
上記従来のシール剤入りタイヤは、加硫成形前のタイヤ本体にインナーライナーを重ね合わせるときに、両者の接触面の一部に、あるいはインナーライナーどうしの接触面の一部にタルク等の離型剤を塗布しておき、この状態で加硫成形を行うことによりタイヤ本体にインナーライナーを一体化するとともに、前記離型剤を塗布した部分を非接着状態で残留させてシール剤室を形成するようになっている。
【０００４】
【発明が解決しようとする課題】
ところで、タイヤ本体およびインナーライナーより成る生タイヤを成形型に挿入して加硫成形する際に、インナーライナーが引き伸ばされて離型剤としてのタルクの密度が低い部分が発生するため、その部分が加硫接着されて完全な形状のシール剤室が形成されなくなる可能性がある。
【０００５】
本発明は前述の事情に鑑みてなされたもので、生タイヤを加硫成形する際に、シール剤室に臨む部分でインナーライナーが加硫接着されるのを防止し、完全な形状のシール剤室を形成できるようにすることを目的とする。
【０００６】
【課題を解決するための手段】
上記目的を達成するために、請求項１に記載された発明は、加硫成形前のタイヤ本体の内面に袋状のインナーライナーを直接重ね合わせて加硫成形することにより該インナーライナーの少なくとも一部をタイヤ本体の内面に加硫接着し、トレッドの内側に前記インナーライナーにより区画された輪状のシール剤室を形成するシール剤入りタイヤの製造方法において、袋状のインナーライナーからなる前記シール剤室の内部に液体離型剤を付着させる工程と、前記インナーライナーの外側にタイヤ本体を付けて生タイヤを成形する工程と、前記生タイヤを最終製品形状となるように加硫成形する工程と、前記インナーライナーに形成した注入口から該インナーライナーの内部に区画された前記シール剤室にシール剤を注入する工程と、前記注入口に接着テープを貼り付ける工程とからなることを特徴とする。
【０００７】
上記構成によれば、加硫成形前のタイヤ本体の内面に袋状のインナーライナーを直接重ね合わせた状態で、インナーライナーのシール剤室に臨む部分に液体離型剤を付着させるので、加硫成形時にインナーライナーが引き伸ばされても、液体離型剤がインナーライナーの表面に沿って流れるためにシール剤室に臨む部分でインナーライナーが加硫接着されることがなくなり、これにより完全な形状のシール剤室を形成することが可能となる。
【０００８】
また請求項２に記載された発明は、請求項１の構成に加えて、前記インナーライナーは、横断面環状の周壁と、その周壁を２分割する横断面Ｓ字状の隔壁とを一体に備えることを特徴とする。
【０００９】
上記構成によれば、インナーライナーの横断面環状の周壁を横断面Ｓ字状の隔壁で２分割したので、周壁の半周と隔壁とでシール剤室を区画することができる。
【００１０】
【発明の実施の形態】
以下、本発明の実施の形態を、添付図面に示した本発明の実施例に基づいて説明する。 図１〜図７は本発明の一実施例を示すもので、図１はタイヤを装着した車輪の横断面図、図２はタイヤの製造工程の第１分図、図３はタイヤの製造工程の第２分図、図４は図２の４方向拡大矢視図、図５は図４の５−５線矢視図、図６は図２の６−６線拡大断面図、図７は図３の７−７線拡大断面図である。
【００１１】
図１に示すように、自動二輪車用車輪のリムＲには、タイヤ本体１と、その内部に加硫接着されたインナーライナー２とからなるチューブレスタイヤＴが装着される。インナーライナー２は、タイヤＴの半径方向内側に位置する空気室周壁３ｉ，３ｉと、半径方向外側に位置するシール剤室周壁３ｏとを備えて断面Ｕ字状に形成された周壁３を備える。周壁３の空気室周壁３ｉ，３ｉとシール剤室周壁３ｏとを接続する一対の接続部間は、それと一体に形成された隔壁４によって相互に接続される。
【００１２】
空気室周壁３ｉ，３ｉと隔壁４との間に画成された断面略円形の空気室５には空気が充填され、シール剤室周壁３ｏと隔壁４との間に画成された断面略円弧状のシール剤室６には公知の液状シール剤７が充填される。
【００１３】
リムＲはタイヤＴの円周方向に延びる環状のリム本体部１１と、リム本体部１１の幅方向両端から半径方向外側に延びてタイヤ本体１の内周を保持する一対のフランジ部１２，１２とを備える。インナーライナー２の内部に形成された空気室５に空気を充填する空気弁１３は、リム本体部１１の円周方向１ヵ所に形成した空気弁取付部１４を貫通して支持される。
【００１４】
而して、インナーライナー２のシール剤室６は空気室５の空気圧によりトレッド１５の内側に沿った形状に保持されるため、釘等により半径方向あるいは側方からタイヤ本体１が刺傷を受けても、シール剤７がその刺傷を直ちに埋めて補修し、空気室５からの空気の漏出を遅らせる。また、シール剤７はシール剤室６に保持されていて、空気室５側へ流出することがないから、空気弁１３やそれに当てがわれる圧力ゲージ等を詰まらせることもない。
【００１５】
次に、図２および図３に基づいて前記タイヤＴの製造工程を説明する。
【００１６】
タイヤＴの製造工程は、材料混練工程、インナーライナー押し出し成形工程、切断工程、切開工程、孔開け工程、接合工程、液体離型剤注入工程、ドラム巻付工程、生タイヤ成形工程、金型セット工程、加硫工程、シール剤注入工程、孔塞ぎ工程および検査工程からなる。
【００１７】
先ず、材料混練工程で混練した材料をインナーライナー押し出し成形工程で押し出し成形することにより、生ゴムよりなるインナーライナー２を成形する。インナーライナー２は、周壁３（図１参照）を構成するシール剤室周壁３ｏおよび一対の空気室周壁３ｉ，３ｉと、隔壁４とを一体に備えており、前記シール剤室周壁３ｏおよび隔壁４は横断面環状に接続されるとともに、その接続部に前記一対の空気室周壁３ｉ，３ｉが接続される。続いて、切断工程でインナーライナー２を所定長さに切断し、更に孔開け工程でインナーライナー２の隔壁４に注入口８を穿設する。
【００１８】
続いて、前記切断工程で切断されたインナーライナー２の両端部を接合工程で接合し、該インナーライナー２を環状にする。図４および図５に示すように、インナーライナー２の切断された両端部をそれぞれ保持して接合する保持型１９は、相互に開閉する上型２０および下型２１から構成される。インナーライナー２を偏平に圧縮した状態で保持すべく、上型２０および下型２１の対向部に浅い溝状の保持面２０1 ，２１1 がそれぞれ凹設されており、その上型２０の保持面２０1 にインナーライナー２のシール剤室周壁３ｏが嵌合するとともに、その下型２１の保持面２１1 にインナーライナー２の空気室周壁３ｉ，３ｉおよび隔壁４が嵌合する。
【００１９】
続いて、液体離型剤注入工程でインナーライナー２の隔壁４の注入口８からシール剤室６に液体離型剤９を注入する。次に、前記液体離型剤注入工程でシール剤室６に液体離型剤９を注入された環状のインナーライナー２を、ドラム巻付け工程でドラム２３の外周に嵌合させ、更に生タイヤ成形工程でインナーライナー２の外側にタイヤ本体１の各部の素材を巻き付けて生タイヤ２４を成形する。
【００２０】
図６に示すように、前記生タイヤ２４は、インナーライナー２の半径方向外側に巻き付けられたコード部２５と、コード部２５の軸方向両端に連なるようにドラム２３に嵌合する一対のビード部２６，２６と、コード部２５およびビード部２６，２６の半径方向外側を覆うように巻き付けられたトレッド部２７とから構成される。
【００２１】
続いて、ドラム２３から取り外した生タイヤ２４を金型セット工程で加硫成形用の上型２９および下型３０間にセットする。更に図７に示す加硫工程で上型２９および下型３０を加熱するとともに、生タイヤ２４の内部に配置されたブラザー３１を空気圧で膨張させ、その圧力で生タイヤ２４を上型２９および下型３０の成形面に密着させて最終製品形状になるように加硫成形する。
【００２２】
このとき、インナーライナー２のシール剤室周壁３ｏおよび隔壁４は膨張するブラザー３１とタイヤ本体１との間に挟まれて相互に圧接されるが、シール剤室周壁３ｏおよび隔壁４の接触面はそこに液体離型剤９が付着しているために加硫接着されることはなく、液体離型剤９が付着していないシール剤室周壁３ｏおよびタイヤ本体１の接触面と、空気室周壁３ｉ，３ｉおよびタイヤ本体１の接触面とが加硫接着される。しかも加硫成形時にインナーライナー２が伸長しても、流動性のある液体離型剤９はシール剤室周壁３ｏおよび隔壁４の接触面に沿って容易に馴染むため、シール剤室周壁３ｏおよび隔壁４の接触面が加硫接着される虞はない。これにより、シール剤室周壁３ｏおよび隔壁４間に区画されるシール剤室６を正確な形状に形成することができる。
【００２３】
またインナーライナー２のシール剤室周壁３ｏおよび隔壁４の厚さの総和は、空気室周壁３ｉ，３ｉの厚さよりも大きいため、隔壁４の付け根部分に段差が発生する（図７の円内拡大部参照）。そこで、ブラザー３１の外表面に前記段差を吸収するために段部３１1 を設けることにより、シール剤室周壁３ｏ、隔壁４および空気室周壁３ｉ，３ｉを均等な圧力でタイヤ本体１の内面に押し付けることが可能となる。
【００２４】
加硫成形を終えてタイヤ本体１およびインナーライナー２が一体化されたものを金型から取り出した後に、シール剤注入工程で隔壁４の注入口８からシール剤室６の内部にシール剤７を注入する。続く孔塞ぎ工程で前記注入口８に接着テープ３２を張り付けてタイヤＴを完成し、最後の検査工程で完成品の検査を行って全工程を終了する。
【００２５】
次に、図８に基づいて本発明の第２実施例を説明する。
【００２６】
第２実施例は、インナーライナー押出し工程で押し出し成形されるインナーライナー２の形状に特徴を有している。即ち、インナーライナー２は横断面環状の周壁３と、その周壁３を２分割する横断面Ｓ字状の隔壁４とを一体に備えている。切断工程で前記インナーライナー２を所定長さに切断した後に、切開工程でインナーライナー２の周壁３を長手方向に切開することにより、シール剤室周壁３ｏおよび一対の空気室周壁３ｉ，３ｉを形成することができる。それ以後の工程は第１実施例と同様である。
【００２７】
以上、本発明の実施例を詳述したが、本発明はその要旨を逸脱しない範囲で種々の設計変更を行うことが可能である。
【００２８】
【発明の効果】
以上のように請求項１に記載された発明によれば、加硫成形前のタイヤ本体の内面に袋状のインナーライナーを直接重ね合わせた状態で、インナーライナーのシール剤室に臨む部分に液体離型剤を付着させるので、加硫成形時にインナーライナーが引き伸ばされても、液体離型剤がインナーライナーの表面に沿って流れるためにシール剤室に臨む部分でインナーライナーが加硫接着されることがなくなり、これにより完全な形状のシール剤室を形成することが可能となる。
【００２９】
また請求項２に記載された発明によれば、インナーライナーの横断面環状の周壁を横断面Ｓ字状の隔壁で２分割したので、周壁の半周と隔壁とでシール剤室を区画することができる。
【図面の簡単な説明】
【図１】 タイヤを装着した車輪の横断面図
【図２】 タイヤの製造工程の第１分図
【図３】 タイヤの製造工程の第２分図
【図４】 図２の４方向拡大矢視図
【図５】 図４の５−５線矢視図
【図６】 図２の６−６線拡大断面図
【図７】 図３の７−７線拡大断面図
【図８】 第２実施例にかかるタイヤの製造工程を示す図
【符号の説明】
１ タイヤ本体
２ インナーライナー
３ 周壁
４ 隔壁
６ シール剤室
７ シール剤
８ 注入口
９ 液体離型剤
１５ トレッド
２４ 生タイヤ
３２ 接着テープ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a method for manufacturing a tire with a sealant having a ring-shaped sealant chamber partitioned by an inner liner inside a tread.
[0002]
[Prior art]
Inside the tread of the tire body, a sealant chamber at least partly defined by an inner liner is formed, and the tread stab by a nail or the like is self-sealed with a sealant sealed in the sealant chamber, and air from the stab JP-A-8-323875 discloses a tire with a sealant that delays leakage.
[0003]
The above conventional tire containing a sealant is used to release talc or the like on a part of the contact surface between the inner liners or a part of the contact surface between the inner liners when the inner liner is superimposed on the tire body before vulcanization molding. In this state, the inner liner is integrated with the tire body, and the portion where the release agent is applied is left in a non-adhered state to form a sealant chamber. It is like that.
[0004]
[Problems to be solved by the invention]
By the way, when a raw tire consisting of a tire body and an inner liner is inserted into a mold and vulcanized, a portion having a low density of talc as a release agent is generated due to the inner liner being stretched. There is a possibility that a complete sealant chamber may not be formed by vulcanization bonding.
[0005]
The present invention has been made in view of the above-mentioned circumstances, and prevents the inner liner from being vulcanized and bonded at the portion facing the sealant chamber when the raw tire is vulcanized and molded, thereby completely sealing the sealant. The purpose is to be able to form a chamber.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the invention described in claim 1 is characterized in that at least one of the inner liners is vulcanized by directly superposing a bag- shaped inner liner on the inner surface of the tire body before vulcanization molding. In the method of manufacturing a tire with a sealant, in which a portion is vulcanized and bonded to the inner surface of the tire body, and a ring-shaped sealant chamber partitioned by the innerliner is formed inside the tread, the sealant comprising a bag-like innerliner A step of attaching a liquid release agent to the interior of the chamber, a step of attaching a tire main body to the outside of the inner liner and molding a raw tire, and a step of vulcanizing and molding the raw tire into a final product shape, A step of injecting a sealing agent into the sealing agent chamber partitioned inside the inner liner from an injection port formed in the inner liner; and the injection Characterized in that comprising the step of attaching the adhesive tape.
[0007]
According to the above configuration, the liquid release agent is adhered to the portion of the inner liner facing the sealant chamber in the state where the bag- shaped inner liner is directly superimposed on the inner surface of the tire body before vulcanization molding. Even when the inner liner is stretched at the time of molding, the liquid release agent flows along the surface of the inner liner, so that the inner liner is not vulcanized and bonded at the portion facing the sealant chamber, which makes the complete shape A sealant chamber can be formed.
[0008]
According to a second aspect of the present invention, in addition to the configuration of the first aspect, the inner liner is integrally provided with a peripheral wall having a circular cross section and a partition wall having an S-shaped cross section that divides the peripheral wall into two. It is characterized by that.
[0009]
According to the above configuration, the annular peripheral wall of the inner liner is divided into two by the partition having the S-shaped cross section, so that the sealant chamber can be defined by the half circumference of the peripheral wall and the partition.
[0010]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described based on examples of the present invention shown in the accompanying drawings. 1 to 7 show an embodiment of the present invention. FIG. 1 is a cross-sectional view of a wheel equipped with a tire, FIG. 2 is a first partial view of a tire manufacturing process, and FIG. 3 is a tire manufacturing process. 4 is an enlarged view in the direction of arrow 4 in FIG. 2, FIG. 5 is an enlarged view in the direction of arrow 5-5 in FIG. 4, FIG. 6 is an enlarged cross-sectional view in FIG. FIG. 7 is an enlarged cross-sectional view taken along line 7-7 in FIG. 3.
[0011]
As shown in FIG. 1, a tubeless tire T including a tire body 1 and an inner liner 2 vulcanized and bonded to the inside thereof is mounted on a rim R of a motorcycle wheel. The inner liner 2 includes an air chamber peripheral wall 3i, 3i positioned on the radially inner side of the tire T and a sealant chamber peripheral wall 3o positioned on the radially outer side, and includes a peripheral wall 3 formed in a U-shaped cross section. A pair of connecting portions connecting the air chamber peripheral walls 3i, 3i of the peripheral wall 3 and the sealant chamber peripheral wall 3o are connected to each other by a partition wall 4 formed integrally therewith.
[0012]
The air chamber 5 having a substantially circular cross section defined between the air chamber peripheral walls 3i, 3i and the partition wall 4 is filled with air, and the cross section approximately circular defined between the sealant chamber peripheral wall 3o and the partition wall 4 is filled. The arc-shaped sealant chamber 6 is filled with a known liquid sealant 7.
[0013]
The rim R has an annular rim main body portion 11 extending in the circumferential direction of the tire T, and a pair of flange portions 12 and 12 that extend radially outward from both ends in the width direction of the rim main body portion 11 and hold the inner periphery of the tire main body 1. With. An air valve 13 that fills the air chamber 5 formed in the inner liner 2 with air is supported by penetrating an air valve mounting portion 14 formed in one place in the circumferential direction of the rim main body portion 11.
[0014]
Thus, since the sealant chamber 6 of the inner liner 2 is held in a shape along the inner side of the tread 15 by the air pressure of the air chamber 5, the tire body 1 is stabbed from the radial direction or the side by a nail or the like. However, the sealing agent 7 immediately fills and repairs the stab wound, and delays the leakage of air from the air chamber 5. Further, since the sealant 7 is held in the sealant chamber 6 and does not flow out to the air chamber 5 side, the air valve 13 and the pressure gauge applied thereto are not clogged.
[0015]
Next, the manufacturing process of the tire T will be described with reference to FIGS.
[0016]
The manufacturing process of the tire T includes a material kneading process, an inner liner extrusion molding process, a cutting process, an incision process, a drilling process, a bonding process, a liquid release agent injection process, a drum winding process, a raw tire molding process, and a mold set. It consists of a process, a vulcanization process, a sealing agent injection process, a hole closing process, and an inspection process.
[0017]
First, the material kneaded in the material kneading step is extruded in the inner liner extrusion molding step, thereby molding the inner liner 2 made of raw rubber. The inner liner 2 is integrally provided with a sealant chamber peripheral wall 3o and a pair of air chamber peripheral walls 3i, 3i constituting a peripheral wall 3 (see FIG. 1) and a partition wall 4, and the sealant chamber peripheral wall 3o and the partition wall 4 are integrated. Are connected in an annular shape in cross section, and the pair of air chamber peripheral walls 3i, 3i are connected to the connecting portion. Subsequently, the inner liner 2 is cut into a predetermined length in the cutting process, and the injection port 8 is formed in the partition wall 4 of the inner liner 2 in the drilling process.
[0018]
Subsequently, both end portions of the inner liner 2 cut in the cutting step are joined in the joining step, and the inner liner 2 is formed into an annular shape. As shown in FIGS. 4 and 5, the holding mold 19 that holds and joins both the cut ends of the inner liner 2 includes an upper mold 20 and a lower mold 21 that open and close each other. In order to hold the inner liner 2 in a flatly compressed state, shallow groove-like holding surfaces 20 1 and 21 1 are respectively provided in the opposing portions of the upper die 20 and the lower die 21 so that the upper die 20 is held. the surface 20 1 with the sealant chamber peripheral wall 3o innerliner 2 is fitted, the air chamber peripheral wall 3i of the inner liner 2 the holding surface 21 1 of the lower die 21, 3i and the partition 4 is fitted.
[0019]
Subsequently, the liquid release agent 9 is injected into the sealant chamber 6 from the injection port 8 of the partition wall 4 of the inner liner 2 in the liquid release agent injection step. Next, the annular inner liner 2 in which the liquid release agent 9 is injected into the sealant chamber 6 in the liquid release agent injection step is fitted to the outer periphery of the drum 23 in the drum winding step, and further, a raw tire is molded. The raw tire 24 is formed by winding the material of each part of the tire body 1 around the inner liner 2 in the process.
[0020]
As shown in FIG. 6, the raw tire 24 includes a cord portion 25 wound around the radially outer side of the inner liner 2 and a pair of bead portions that are fitted to the drum 23 so as to be continuous with both ends of the cord portion 25 in the axial direction. 26, 26, and a tread portion 27 wound around the outer side in the radial direction of the cord portion 25 and the bead portions 26, 26.
[0021]
Subsequently, the raw tire 24 removed from the drum 23 is set between the upper mold 29 and the lower mold 30 for vulcanization molding in a mold setting process. Further, the upper die 29 and the lower die 30 are heated in the vulcanization process shown in FIG. 7, and the brother 31 disposed inside the raw tire 24 is inflated with air pressure. Vulcanization molding is performed so that the final product shape is brought into close contact with the molding surface of the mold 30.
[0022]
At this time, the sealant chamber peripheral wall 3o and the partition wall 4 of the inner liner 2 are sandwiched between the inflating brother 31 and the tire body 1 and pressed against each other, but the contact surfaces of the sealant chamber peripheral wall 3o and the partition wall 4 are Since the liquid release agent 9 is adhered there, it is not vulcanized and bonded, and the sealing agent chamber peripheral wall 3o and the contact surface of the tire body 1 to which the liquid release agent 9 does not adhere, and the air chamber peripheral wall 3i, 3i and the contact surface of the tire body 1 are vulcanized and bonded. In addition, even if the inner liner 2 is elongated during vulcanization molding, the fluid liquid release agent 9 easily conforms along the contact surfaces of the sealant chamber peripheral wall 3o and the partition wall 4, so the sealant chamber peripheral wall 3o and the partition wall There is no possibility that the contact surface of 4 is vulcanized and bonded. Thereby, the sealing agent chamber 6 defined between the sealing agent chamber peripheral wall 3o and the partition wall 4 can be formed in an accurate shape.
[0023]
Further, since the total thickness of the sealant chamber peripheral wall 3o and the partition wall 4 of the inner liner 2 is larger than the thickness of the air chamber peripheral walls 3i and 3i, a step is generated at the base portion of the partition wall 4 (enlargement in a circle in FIG. 7). Section). Therefore, by providing the step portion 31 1 on the outer surface of the brother 31 to absorb the step, the sealant chamber peripheral wall 3o, the partition wall 4 and the air chamber peripheral walls 3i and 3i are applied to the inner surface of the tire body 1 with equal pressure. It can be pressed.
[0024]
After the vulcanization molding is completed and the tire body 1 and the inner liner 2 integrated are taken out from the mold, the sealing agent 7 is put into the sealing agent chamber 6 from the inlet 8 of the partition wall 4 in the sealing agent injection step. inject. In the subsequent hole closing process, the adhesive tape 32 is attached to the inlet 8 to complete the tire T, and the final product is inspected in the final inspection process, and all processes are completed.
[0025]
Next, a second embodiment of the present invention will be described with reference to FIG.
[0026]
The second embodiment is characterized by the shape of the inner liner 2 that is extruded in the inner liner extrusion process. That is, the inner liner 2 is integrally provided with a peripheral wall 3 having an annular cross section and a partition wall 4 having an S-shaped cross section that divides the peripheral wall 3 into two. After the inner liner 2 is cut to a predetermined length in the cutting step, the peripheral wall 3 of the inner liner 2 is cut in the longitudinal direction in the cutting step, thereby forming the sealant chamber peripheral wall 3o and the pair of air chamber peripheral walls 3i and 3i. can do. The subsequent steps are the same as in the first embodiment.
[0027]
As mentioned above, although the Example of this invention was explained in full detail, this invention can perform a various design change in the range which does not deviate from the summary .
[0028]
【The invention's effect】
As described above, according to the first aspect of the present invention, in the state where the bag- shaped inner liner is directly superimposed on the inner surface of the tire body before vulcanization molding, the liquid is applied to the portion facing the sealant chamber of the inner liner. Since the release agent is attached, even if the inner liner is stretched during vulcanization molding, the liquid release agent flows along the surface of the inner liner so that the inner liner is vulcanized and bonded at the portion facing the sealant chamber. This makes it possible to form a completely shaped sealant chamber.
[0029]
According to the second aspect of the present invention, since the circumferential wall of the inner liner having an annular cross section is divided into two by the S-shaped partition wall, the sealant chamber can be defined by the half circumference of the peripheral wall and the partition wall. it can.
[Brief description of the drawings]
1 is a cross-sectional view of a wheel equipped with a tire. FIG. 2 is a first partial view of a tire manufacturing process. FIG. 3 is a second partial view of a tire manufacturing process. FIG. 5 is a view taken along the line 5-5 in FIG. 4. FIG. 6 is an enlarged sectional view taken along line 6-6 in FIG. 2. FIG. 7 is an enlarged sectional view taken along line 7-7 in FIG. The figure which shows the manufacturing process of the tire concerning an Example.
DESCRIPTION OF SYMBOLS 1 Tire main body 2 Inner liner 3 Perimeter wall 4 Partition 6 Sealant chamber 7 Sealant 8 Inlet 9 Liquid release agent 15 Tread 24 Raw tire 32 Adhesive tape

Claims (2)

加硫成形前のタイヤ本体（１）の内面に袋状のインナーライナー（２）を直接重ね合わせて加硫成形することにより該インナーライナー（２）の少なくとも一部をタイヤ本体（１）の内面に加硫接着し、トレッド（１５）の内側に前記インナーライナー（２）により区画された輪状のシール剤室（６）を形成するシール剤入りタイヤの製造方法において、
袋状のインナーライナー（２）からなる前記シール剤室（６）の内部に液体離型剤（９）を付着させる工程と、
前記インナーライナー（２）の外側にタイヤ本体（１）を付けて生タイヤ（２４）を成形する工程と、
前記生タイヤ（２４）を最終製品形状となるように加硫成形する工程と、
前記インナーライナー（２）に形成した注入口（８）から該インナーライナー（２）の内部に区画された前記シール剤室（６）にシール剤（７）を注入する工程と、
前記注入口（８）に接着テープ（３２）を貼り付ける工程と、
からなることを特徴とするシール剤入りタイヤの製造方法。A bag- shaped inner liner (2) is directly superimposed on the inner surface of the tire body (1) before vulcanization molding, and vulcanization molding is performed so that at least a part of the inner liner (2) is adhered to the inner surface of the tire body (1). In a method for producing a tire with a sealant that forms a ring-shaped sealant chamber (6) partitioned by the inner liner (2) inside the tread (15).
Attaching a liquid release agent (9) to the inside of the sealant chamber (6) comprising a bag-like inner liner (2);
Attaching the tire body (1) to the outside of the inner liner (2) to form a green tire (24);
Vulcanizing and molding the green tire (24) into a final product shape;
Injecting the sealing agent (7) from the injection port (8) formed in the inner liner (2) into the sealing agent chamber (6) defined in the inner liner (2);
Attaching the adhesive tape (32) to the inlet (8);
A method for producing a tire with a sealant comprising: 前記インナーライナー（２）は、横断面環状の周壁（３）と、その周壁（３）を２分割する横断面Ｓ字状の隔壁（４）とを一体に備えることを特徴とする、請求項１に記載のシール剤入りタイヤの製造方法。The inner liner (2) is integrally provided with a peripheral wall (3) having an annular cross section and a partition wall (4) having an S-shaped cross section that divides the peripheral wall (3) into two. A method for producing a tire with a sealant according to 1.
JP06538498A 1998-03-16 1998-03-16 Manufacturing method of tire with sealant Expired - Fee Related JP3999338B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP06538498A JP3999338B2 (en) 1998-03-16 1998-03-16 Manufacturing method of tire with sealant
TW88103531A TW397762B (en) 1998-03-16 1999-03-08 The manufacturing method of tires with tire-patcher and tires with tire-patches
CO99015748A CO5090885A1 (en) 1998-03-16 1999-03-15 METHOD AND MANUFACTURE OF SEALANT TIRE AND SEALANT TIRE
MYPI9900953 MY123006A (en) 1998-03-16 1999-03-15 Method of manufacturing sealant-containing tires, and sealant-containing tire

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP06538498A JP3999338B2 (en) 1998-03-16 1998-03-16 Manufacturing method of tire with sealant

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Publication Number Publication Date
JPH11254547A JPH11254547A (en) 1999-09-21
JP3999338B2 true JP3999338B2 (en) 2007-10-31

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Publication number Priority date Publication date Assignee Title
WO2009014082A1 (en) * 2007-07-24 2009-01-29 The Yokohama Rubber Co., Ltd. Process for producing self-sealing pneumatic tire and apparatus therefor

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