JP2014195873A - Coating applicator and method of mold release agent to unvulcanization tire inner surface - Google Patents

Coating applicator and method of mold release agent to unvulcanization tire inner surface Download PDF

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JP2014195873A
JP2014195873A JP2013071503A JP2013071503A JP2014195873A JP 2014195873 A JP2014195873 A JP 2014195873A JP 2013071503 A JP2013071503 A JP 2013071503A JP 2013071503 A JP2013071503 A JP 2013071503A JP 2014195873 A JP2014195873 A JP 2014195873A
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release agent
unvulcanized tire
coating
axial direction
application
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一郎 西村
Ichiro Nishimura
一郎 西村
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a coating applicator and method of a mold release agent to an unvulcanization tire inner surface in which dispersion and liquid sagging of the mold release agent to a circumference are surely prevented, and the mold release agent can be applied to the tire inner surface.SOLUTION: An axis of rotation 2 in which at least three application arms 3 are disposed in an axial direction in a side-by-side maner is disposed in an inside of an unvulcanization tire T making an axial direction thereof a tire axial direction, then respective application arms 3 are elongated to a radial direction of the axis of rotation 2, application parts 6 attached to ends of these application arms 3 are made to contact with the unvulcanization tire inner surface, while the axis of rotation 2 is revolved, these application arms 3 are moved to an axial direction of the axis of rotation 2 at least, and a mold release agent L supplied to these application parts 6 is applied to the unvulcanization tire inner surface.

Description

本発明は、未加硫タイヤ内面への離型剤の塗布装置および方法に関し、さらに詳しくは、離型剤の周辺への飛散および液ダレをより確実に防止して、未加硫タイヤ内面に離型剤を塗布することができる未加硫タイヤ内面への離型剤の塗布装置および方法に関するものである。   The present invention relates to an apparatus and a method for applying a release agent to the inner surface of an unvulcanized tire, and more specifically, to prevent the release agent from splashing around the periphery and dripping more reliably, The present invention relates to an apparatus and a method for applying a release agent to the inner surface of an unvulcanized tire capable of applying a release agent.

タイヤを製造する加硫工程では、タイヤモールドの中に配置された未加硫タイヤの内側に加硫ブラダを挿入した後、この加硫ブラダを膨張させる。膨張させた加硫ブラダにより、未加硫タイヤ内面が押圧されて、未加硫タイヤはタイヤモールド内で加硫される。所定の加硫時間が経過後は、膨張させた加硫ブラダを収縮させて加硫されたタイヤから取り出し、加硫されたタイヤは型開きしたタイヤモールドから取り出される。未加硫タイヤ内面には、通常、加硫ブラダの挿入や取り出しを円滑にするために離型剤が塗布されている。   In a vulcanization process for manufacturing a tire, a vulcanized bladder is inserted inside an unvulcanized tire arranged in a tire mold, and then the vulcanized bladder is expanded. The inner surface of the unvulcanized tire is pressed by the expanded vulcanization bladder, and the unvulcanized tire is vulcanized in the tire mold. After a predetermined vulcanization time has elapsed, the expanded vulcanization bladder is shrunk and taken out from the vulcanized tire, and the vulcanized tire is taken out from the tire mold that has been opened. A release agent is usually applied to the inner surface of the unvulcanized tire in order to facilitate insertion and removal of the vulcanized bladder.

この離型剤は、例えば、スプレーや塗布ガンにより噴霧、噴射されて未加硫タイヤ内面に塗布されている。離型剤が、未加硫タイヤの意図していない部分や加硫装置の周辺に飛散して付着すると、タイヤ品質や作業環境等に悪影響が生じる。そこで、離型剤が周辺に飛散することを防止する装置や方法が種々提案されている（例えば、特許文献１参照）。   The release agent is sprayed and sprayed by, for example, a spray or an application gun and applied to the inner surface of the unvulcanized tire. If the release agent scatters and adheres to an unintended portion of the unvulcanized tire or around the vulcanizing device, the tire quality, work environment, and the like are adversely affected. Therefore, various devices and methods for preventing the release agent from being scattered around have been proposed (see, for example, Patent Document 1).

特許文献１に記載の塗布装置では、未加硫タイヤの開口をカバー等で覆い、そのカバー等で覆われた中に配置された塗布ガンから離型剤を噴霧、噴射することにより、未加硫タイヤ内面に離型剤を塗布している。この塗布装置の場合、カバー等が確実に未加硫タイヤの開口を塞いでいなければ、離型剤が外部に飛散する危険性がある。   In the coating apparatus described in Patent Document 1, the opening of an unvulcanized tire is covered with a cover or the like, and a release agent is sprayed and sprayed from a coating gun arranged inside the cover or the like, thereby removing the unvulcanized tire. A mold release agent is applied to the inner surface of the tire. In the case of this coating apparatus, if the cover or the like does not reliably block the opening of the unvulcanized tire, there is a risk that the release agent scatters to the outside.

また、離型剤を噴霧、或いは、噴射して塗布する方法では、未加硫タイヤ内面の形状に応じて噴霧、噴射条件を厳密に調整しなければ、未加硫タイヤ内面に均一に離型剤を付着させることが難しい。そのため、噴霧、噴射して離型剤を塗布する方法では、未加硫タイヤ内面で離型剤の液ダレが生じ易くなるという問題があった。   Also, in the method of spraying or spraying the release agent, if the spraying and spraying conditions are not strictly adjusted according to the shape of the inner surface of the unvulcanized tire, the mold is uniformly released on the inner surface of the unvulcanized tire. It is difficult to attach the agent. Therefore, in the method of applying the release agent by spraying and spraying, there has been a problem that the release agent tends to sag on the inner surface of the unvulcanized tire.

特開２０００−２８８４３０号公報JP 2000-288430 A

本発明の目的は、離型剤の周辺への飛散および液ダレをより確実に防止して、未加硫タイヤ内面に離型剤を塗布することができる未加硫タイヤ内面への離型剤の塗布装置および方法を提供することにある。   An object of the present invention is to release a release agent on the inner surface of an unvulcanized tire, which can more reliably prevent the release agent from being scattered and dripped and can be applied to the inner surface of the unvulcanized tire. It is in providing the coating apparatus and method of this.

上記目的を達成するため本発明の未加硫タイヤ内面への離型剤塗布装置は、未加硫タイヤの内側に配置される未加硫タイヤ内面への離型剤の塗布装置であって、この未加硫タイヤのタイヤ軸方向を軸方向にして設置される回転軸と、この回転軸の軸方向に隣り合って取付けられた少なくとも３つの塗布アームと、それぞれの塗布アームに離型剤を供給する供給手段とを備え、それぞれの塗布アームは、先端に塗布部を有するとともに、前記回転軸の軸方向に移動可能、かつ、前記回転軸の半径方向に伸縮可能であり、前記離型剤が供給された塗布部を未加硫タイヤ内面に接触させる構成にしたことを特徴とする。   In order to achieve the above object, a release agent coating device for an inner surface of an unvulcanized tire of the present invention is a device for applying a release agent to an inner surface of an unvulcanized tire disposed inside an unvulcanized tire, A rotating shaft installed with the tire axial direction of the unvulcanized tire as the axial direction, at least three coating arms attached adjacent to the axial direction of the rotating shaft, and a release agent on each coating arm Each of the application arms has an application part at the tip, is movable in the axial direction of the rotary shaft, and can be expanded and contracted in the radial direction of the rotary shaft, and the release agent It is characterized by the configuration in which the coating portion supplied with the rubber is brought into contact with the inner surface of the unvulcanized tire.

本発明の未加硫タイヤ内面への離型剤塗布方法は、少なくとも３つの塗布アームが軸方向に隣り合って取付けられた回転軸を、その軸方向をタイヤ軸方向として、未加硫タイヤの内側に配置し、次いで、それぞれの塗布アームを前記回転軸の半径方向に伸長させて、塗布アームの先端に取り付けた塗布部を未加硫タイヤ内面に接触させ、前記回転軸を回転させながら、前記塗布アームを少なくとも前記回転軸の軸方向に移動させて、前記塗布部に供給された離型剤を未加硫タイヤ内面に塗布することを特徴とする。   The method for applying a release agent to the inner surface of an unvulcanized tire according to the present invention is based on a rotating shaft having at least three application arms mounted adjacent to each other in the axial direction. Arranged inside, and then extending each coating arm in the radial direction of the rotating shaft, contacting the coating portion attached to the tip of the coating arm to the inner surface of the unvulcanized tire, while rotating the rotating shaft, The coating arm is moved at least in the axial direction of the rotating shaft, and the release agent supplied to the coating unit is coated on the inner surface of the unvulcanized tire.

本発明によれば、塗布アームを伸長させて、その先端に取り付けられた塗布部を未加硫タイヤ内面に接触させた状態にして、この塗布部に供給された離型剤を塗布するので、離型剤が飛散することを防止できる。そして、回転軸の軸方向に隣り合って少なくとも３つの塗布アームが取り付けられているので、この回転軸を回転させながら、塗布アームを少なくとも回転軸の軸方向に移動させることにより、未加硫タイヤ内面のすべての範囲を網羅するように液ダレを防止しつつ、離型剤を塗布することが可能になる。   According to the present invention, the coating arm is extended, the coating part attached to the tip thereof is brought into contact with the inner surface of the unvulcanized tire, and the release agent supplied to the coating part is applied. The release agent can be prevented from scattering. Since at least three coating arms are attached adjacent to each other in the axial direction of the rotating shaft, an unvulcanized tire can be obtained by moving the coating arm at least in the axial direction of the rotating shaft while rotating the rotating shaft. It becomes possible to apply the release agent while preventing dripping so as to cover the entire range of the inner surface.

ここで、前記未加硫タイヤ内面の形状データを予め制御部に入力し、この形状データに基づいて、前記制御部により、それぞれの塗布アームの少なくとも前記回転軸の軸方向の移動を制御することもできる。これにより、様々な内面形状の未加硫タイヤに対して離型剤を自動化して塗布することが可能になる。   Here, the shape data of the inner surface of the unvulcanized tire is input to the control unit in advance, and based on the shape data, the control unit controls movement of at least the rotating shaft of each coating arm in the axial direction. You can also. Thereby, it becomes possible to apply the release agent to uncured tires having various inner shapes in an automated manner.

前記未加硫タイヤ内面のうち、離型剤を塗布する範囲と塗布しない範囲を区分する塗布範囲データを予め前記制御部に入力し、この塗布範囲データに基づいて、前記制御部により、前記離型剤を塗布する範囲のみに前記離型剤が供給された塗布部を接触させることもできる。これにより、所望の範囲のみに離型剤を自動化して塗布することが可能になる。   Out of the unvulcanized tire inner surface, application range data for distinguishing a range where the release agent is applied and a range where the release agent is not applied is input to the control unit in advance, and the control unit performs the release based on the application range data. The application part to which the release agent is supplied can also be brought into contact only in a range where the mold agent is applied. Thereby, it becomes possible to apply the release agent in an automated manner only in a desired range.

前記塗布部を塗布アームの先方へ付勢する付勢部材を設けることもできる。これにより、塗布部が未加硫タイヤ内面の形状に追従し易くなるので、離型剤を均質に塗布するには有利になる。   A biasing member that biases the coating portion toward the tip of the coating arm can also be provided. This makes it easier for the application part to follow the shape of the inner surface of the unvulcanized tire, which is advantageous for applying the release agent uniformly.

本発明の未加硫タイヤ内面への離型剤の塗布装置を例示する正面図である。It is a front view which illustrates the application apparatus of the mold release agent to the unvulcanized tire inner surface of this invention. 図１の塗布装置を例示する平面図である。It is a top view which illustrates the coating device of FIG. 塗布部を例示する説明図である。It is explanatory drawing which illustrates an application part. 別の塗布部を例示する説明図である。It is explanatory drawing which illustrates another application part. さらに別の塗布部を例示する説明図である。It is explanatory drawing which illustrates another application part. さらに別の塗布部を例示する説明図である。It is explanatory drawing which illustrates another application part. 離型剤を塗布している塗布装置を正面視で例示する説明図である。It is explanatory drawing which illustrates the coating device which has apply | coated the mold release agent by a front view.

以下、本発明の未加硫タイヤ内面への離型剤の塗布装置および方法を図に示した実施形態に基づいて説明する。   Hereinafter, a device and a method for applying a release agent to the inner surface of an unvulcanized tire according to the present invention will be described based on the embodiments shown in the drawings.

図１、図２に例示する本発明の未加硫タイヤ内面への離型剤の塗布装置１（以下、塗布装置１という）は、例えば、タイヤ成形機に隣接して配置され、成形された未加硫タイヤＴがこの塗布装置１に外挿される。そして、未加硫タイヤＴの内側に配置された塗布装置１によって、未加硫タイヤ内面に離型剤Ｌが塗布され、その後、この未加硫タイヤＴは加硫工程に送られることになる。   A release agent coating device 1 (hereinafter referred to as a coating device 1) on the inner surface of an unvulcanized tire of the present invention illustrated in FIGS. 1 and 2 is disposed adjacent to a tire molding machine and molded, for example. The unvulcanized tire T is extrapolated to the coating device 1. And the mold release agent L is apply | coated to the unvulcanized tire inner surface by the coating device 1 arrange | positioned inside the unvulcanized tire T, and this unvulcanized tire T will be sent to a vulcanization process after that. .

この塗布装置１は、回転軸２と、回転軸２の軸方向に隣り合って取付けられた少なくとも３つの塗布アーム３と、それぞれの塗布アーム３に離型剤Ｌを供給する供給手段とを備えている。即ち、互いに独立した塗布アーム３が、回転軸２の軸方向に少なくとも３つ並んで配置される。この実施形態では、さらに、制御部１０が設けられている。制御部１０は、それぞれの塗布アーム３の動作、回転軸２の回転および離型剤Ｌの供給量を制御する。   The coating apparatus 1 includes a rotating shaft 2, at least three coating arms 3 that are mounted adjacent to each other in the axial direction of the rotating shaft 2, and a supply unit that supplies the release agent L to each coating arm 3. ing. That is, at least three coating arms 3 independent from each other are arranged in the axial direction of the rotating shaft 2. In this embodiment, a control unit 10 is further provided. The controller 10 controls the operation of each coating arm 3, the rotation of the rotating shaft 2, and the supply amount of the release agent L.

回転軸２はベース８に立設されて、回転駆動部９の駆動力により回転駆動される。回転軸２は回転数が一定仕様にすることもできるが、可変仕様にすることが好ましい。   The rotating shaft 2 is erected on the base 8 and is rotationally driven by the driving force of the rotation driving unit 9. The rotating shaft 2 can have a constant rotational speed, but preferably has a variable specification.

この実施形態では４つの塗布アーム３を備えている。また、それぞれの塗布アーム３は、回転軸２の半径方向二方向に突出している。塗布アーム３は、回転軸２の半径方向一方向、三方向、四方向などに突出させることもできる。塗布アーム３を複数方向に突出させる場合は、例えば、回転軸２の周方向に均等間隔で突出させる。   In this embodiment, four coating arms 3 are provided. Each coating arm 3 protrudes in two radial directions of the rotating shaft 2. The coating arm 3 can be protruded in one direction, three directions, four directions, etc. in the radial direction of the rotating shaft 2. When projecting the application arm 3 in a plurality of directions, for example, the coating arm 3 is projected at equal intervals in the circumferential direction of the rotating shaft 2.

それぞれの塗布アーム３は、先端に塗布部６を有し、回転軸２の軸方向に移動可能に取り付けられている。塗布アーム３は太さが異なる複数のアーム部５により構成されたテレスコピック構造である。これにより、塗布アーム３は回転軸２の半径方向に伸縮可能になっている。回転軸２の軸方向への塗布アーム３の移動および回転軸２の半径方向への塗布アーム３の伸縮は、アーム駆動部４の駆動力により行われる。それぞれの塗布アーム３はそれぞれ個別独立して移動および伸縮する。   Each coating arm 3 has a coating portion 6 at the tip, and is attached to be movable in the axial direction of the rotary shaft 2. The coating arm 3 has a telescopic structure constituted by a plurality of arm portions 5 having different thicknesses. As a result, the coating arm 3 can be expanded and contracted in the radial direction of the rotary shaft 2. The movement of the coating arm 3 in the axial direction of the rotating shaft 2 and the expansion and contraction of the coating arm 3 in the radial direction of the rotating shaft 2 are performed by the driving force of the arm driving unit 4. Each application arm 3 moves and expands and contracts independently.

塗布アーム３には、離型剤Ｌの供給源に接続された供給路７が内設されている。この供給路７の一方端部は塗布部６に、他方端部は供給源につながっている。この供給路７と供給路７に離型剤Ｌを送り込むポンプとにより、離型剤Ｌの供給手段が構成されている。塗布アーム３を伸長させて、離型剤Ｌが供給された塗布部６を未加硫タイヤ内面に接触させることにより、離型剤Ｌを未加硫タイヤ内面に塗布することになる。   A supply path 7 connected to a supply source of the release agent L is provided in the coating arm 3. One end of the supply path 7 is connected to the coating unit 6 and the other end is connected to the supply source. The supply means for the release agent L is configured by the supply path 7 and the pump that feeds the release agent L into the supply path 7. By extending the coating arm 3 and bringing the coating part 6 supplied with the release agent L into contact with the inner surface of the unvulcanized tire, the release agent L is applied to the inner surface of the unvulcanized tire.

図３に例示するように、塗布部６は、供給路７を通じて供給された離型剤Ｌを保持する。したがって、塗布部６としては、離型剤Ｌを吸収するもの（スポンジ状体、繊維状体、フェルト等の布状体、皮革など）や、表面に離型剤Ｌを付着させることができるもの（各種樹脂、ゴム、金属、木材など）を用いる。   As illustrated in FIG. 3, the application unit 6 holds the release agent L supplied through the supply path 7. Therefore, the application part 6 can absorb the release agent L (sponge-like body, fibrous body, cloth such as felt, leather, etc.), or can attach the release agent L to the surface. (Various resins, rubber, metal, wood, etc.) are used.

この実施形態では、塗布部６が塗布アーム３の先端で軸支されて回転可能な回転ローラになっている。したがって、供給路７を通じて供給された離型剤Ｌが、塗布部６の表面に転写されるようにして付着、或いは、吸収される。このタイプの塗布部６は、例えば、未加硫タイヤ内面の内、トレッド内面に離型剤Ｌを塗布する塗布アーム３に用いる。図１で言えば、上から２番目と３番目に配置された塗布アーム３に用いる。   In this embodiment, the coating unit 6 is a rotatable roller that is pivotally supported at the tip of the coating arm 3 and is rotatable. Therefore, the release agent L supplied through the supply path 7 is adhered or absorbed so as to be transferred to the surface of the application unit 6. This type of application unit 6 is used for, for example, the application arm 3 that applies the release agent L to the inner surface of the tread in the inner surface of the unvulcanized tire. If it says in FIG. 1, it will use for the application | coating arm 3 arrange | positioned 2nd and 3rd from the top.

図４に例示する塗布部６は、塗布アーム３の先端で全方向に回転可能に保持された回転ボールになっている。したがって、供給路７を通じて供給された離型剤Ｌが、塗布部６の表面に転写されるようにして付着、或いは、吸収される。このタイプの塗布部６は、未加硫タイヤ内面のいずれの範囲にも対応できるが、例えば、未加硫タイヤ内面の内、サイド内面（トレッド内面以外の部分）に離型剤Ｌを塗布する塗布アーム３に用いる。図１で言えば、上から１番目と４番目に配置された塗布アーム３に用いる。もちろん、すべての塗布アーム３に用いてもよい。   The application unit 6 illustrated in FIG. 4 is a rotating ball that is rotatably held at the tip of the application arm 3 in all directions. Therefore, the release agent L supplied through the supply path 7 is adhered or absorbed so as to be transferred to the surface of the application unit 6. This type of application unit 6 can correspond to any range of the inner surface of the unvulcanized tire, but, for example, the mold release agent L is applied to the side inner surface (portion other than the tread inner surface) of the unvulcanized tire inner surface. Used for coating arm 3. If it says in FIG. 1, it will use for the application | coating arm 3 arrange | positioned 1st and 4th from the top. Of course, it may be used for all coating arms 3.

図５に例示する塗布部６は、塗布アーム３の先端で突出して固定されている。したがって、供給路７を通じて供給された離型剤Ｌが、塗布部６に吸収されてその表面に浸み出てくる。このタイプの塗布部６は、離型剤Ｌを吸収するもので形成される。このタイプの塗布部６は、未加硫タイヤ内面のいずれの範囲にも対応できるが、例えば、未加硫タイヤ内面の内、サイド内面（トレッド内面以外の部分）に離型剤Ｌを塗布する塗布アーム３に用いる。図１で言えば、上から１番目と４番目に配置された塗布アーム３に用いる。もちろん、すべての塗布アーム３に用いてもよい。   The application unit 6 illustrated in FIG. 5 protrudes and is fixed at the tip of the application arm 3. Accordingly, the release agent L supplied through the supply path 7 is absorbed by the application unit 6 and oozes out on the surface thereof. This type of application part 6 is formed by absorbing the release agent L. This type of application unit 6 can correspond to any range of the inner surface of the unvulcanized tire, but, for example, the mold release agent L is applied to the side inner surface (portion other than the tread inner surface) of the unvulcanized tire inner surface. Used for coating arm 3. If it says in FIG. 1, it will use for the application | coating arm 3 arrange | positioned 1st and 4th from the top. Of course, it may be used for all coating arms 3.

図６に例示する塗布部６は、図３に例示した塗布部６に、この塗布部６を塗布アーム３の先方へ付勢する付勢部材６ａを設けたものである。付勢部材６ａとしては、ゴムなどの様々な弾性体やばね等を用いる。付勢部材６ａを設けることにより、塗布部６が塗布アーム３の長手方向に移動できる。この付勢部材６ａは、図４、図５に例示したタイプの塗布部６に設けることもできる。   The application unit 6 illustrated in FIG. 6 is obtained by providing the application unit 6 illustrated in FIG. 3 with an urging member 6 a that urges the application unit 6 toward the tip of the application arm 3. As the urging member 6a, various elastic bodies such as rubber, springs, and the like are used. By providing the urging member 6 a, the application unit 6 can move in the longitudinal direction of the application arm 3. This urging member 6a can also be provided in the application part 6 of the type illustrated in FIGS.

未加硫タイヤ内面に離型剤Ｌを塗布するには、図１に例示するように、回転軸２の軸方向が未加硫タイヤＴのタイヤ軸方向になるようにして、回転軸２およびそれぞれの塗布アーム３を未加硫タイヤＴの内側に配置する。この際に、塗布アーム３は収縮させた状態にしておく。尚、未加硫タイヤＴを移動させて塗布装置１にセットすることも、塗布装置１を移動させて未加硫タイヤＴをセットすることもできる。   In order to apply the release agent L to the inner surface of the unvulcanized tire, as illustrated in FIG. 1, the axial direction of the rotating shaft 2 is set to the tire axial direction of the unvulcanized tire T, and the rotating shaft 2 and Each coating arm 3 is arranged inside the unvulcanized tire T. At this time, the coating arm 3 is kept in a contracted state. The unvulcanized tire T can be moved and set in the coating apparatus 1, or the coating apparatus 1 can be moved and the unvulcanized tire T can be set.

次いで、図７に例示するように、回転軸２の所定の軸方向に配置されたそれぞれの塗布アーム３を、回転軸２の半径方向に伸長させて、塗布部６を対向している未加硫タイヤ内面に接触させる。この状態で回転軸２を回転させて、回転軸２を中心にして塗布アーム３を回転させる。回転軸２を回転させながらそれぞれの塗布アーム３を伸長させて、塗布部６を対向している未加硫タイヤ内面に接触させてもよい。   Next, as illustrated in FIG. 7, each coating arm 3 arranged in a predetermined axial direction of the rotating shaft 2 is extended in the radial direction of the rotating shaft 2, and the uncoated portion 6 facing the coating portion 6 is not applied. Contact the inner surface of the sulfur tire. In this state, the rotating shaft 2 is rotated, and the coating arm 3 is rotated about the rotating shaft 2. Each coating arm 3 may be extended while rotating the rotating shaft 2, and the coating unit 6 may be brought into contact with the opposing unvulcanized tire inner surface.

これにより、塗布部６に供給された離型剤Ｌを未加硫タイヤ内面に塗布する。必要な範囲に離型剤Ｌを塗布するために、回転軸２を回転させながら、塗布アーム３を少なくとも回転軸２の軸方向に移動させて、離型剤Ｌを未加硫タイヤ内面に塗布する。   Thereby, the mold release agent L supplied to the application part 6 is apply | coated to an unvulcanized tire inner surface. In order to apply the release agent L to the required range, the application arm 3 is moved at least in the axial direction of the rotary shaft 2 while rotating the rotary shaft 2 to apply the release agent L to the inner surface of the unvulcanized tire. To do.

トレッド内面は縦断面形状が比較的平坦なので、塗布アーム３を回転軸２の軸方向に移動させるだけで、ほとんどの範囲に離型剤Ｌを塗布することも可能である。一方、サイド内面は断面形状が凹凸状で複雑なので、塗布アーム３を回転軸２の軸方向に移動させるとともに、回転軸２の半径方向に移動させて離型剤Ｌを塗布する。   Since the inner surface of the tread has a relatively flat vertical cross-sectional shape, the release agent L can be applied to almost the entire range simply by moving the coating arm 3 in the axial direction of the rotary shaft 2. On the other hand, since the cross-sectional shape of the side inner surface is uneven and complicated, the coating arm 3 is moved in the axial direction of the rotary shaft 2 and the release agent L is applied by moving in the radial direction of the rotary shaft 2.

本発明によれば、塗布部６を未加硫タイヤ内面に接触させた状態にして、この塗布部６に供給された離型剤Ｌを塗布するので、離型剤Ｌが飛散することを防止できる。そして、回転軸２の軸方向に隣り合って少なくとも３つの塗布アーム３が取り付けられているので、この回転軸２を回転させながら、塗布アーム３を少なくとも回転軸２の軸方向に移動させることにより、未加硫タイヤ内面のすべての範囲を網羅するように液ダレを防止しつつ、離型剤Ｌを塗布することが可能になる。即ち、従来に比して、離型剤Ｌの周辺への飛散および液ダレをより確実に防止して、未加硫タイヤ内面に離型剤Ｌを塗布することが可能になる。   According to the present invention, since the application part 6 is brought into contact with the inner surface of the unvulcanized tire and the release agent L supplied to the application part 6 is applied, the release agent L is prevented from scattering. it can. Since at least three coating arms 3 are mounted adjacent to each other in the axial direction of the rotary shaft 2, the coating arm 3 is moved at least in the axial direction of the rotary shaft 2 while rotating the rotary shaft 2. The mold release agent L can be applied while preventing dripping so as to cover the entire range of the inner surface of the unvulcanized tire. That is, as compared with the prior art, the release agent L can be more reliably prevented from being scattered and dripped, and the release agent L can be applied to the inner surface of the unvulcanized tire.

未加硫タイヤ内面の形状データを予め制御部１０に入力し、この形状データに基づいて、制御部１０により、それぞれの塗布アーム３の少なくとも回転軸２の軸方向の移動を制御することもできる。これにより、様々な内面形状の未加硫タイヤＴに対して離型剤Ｌを自動化して塗布することが可能になる。塗布アーム３の回転軸２の軸方向の移動および回転軸２の半径方向の伸縮を制御すれば、より詳細に精度よく塗布部６の位置を制御できるので、離型剤Ｌを全体的に均質に塗布するには有利になる。この際に、回転軸２の回転（回転数や回転開始および停止）も適宜、制御するとよい。   The shape data of the inner surface of the unvulcanized tire is input to the control unit 10 in advance, and based on this shape data, the movement of at least the rotating shaft 2 of each coating arm 3 in the axial direction can be controlled by the control unit 10. . Thereby, it becomes possible to apply | coat the mold release agent L to the unvulcanized tire T of various inner surface shapes automatically. By controlling the movement of the coating arm 3 in the axial direction of the rotary shaft 2 and the expansion and contraction in the radial direction of the rotary shaft 2, the position of the coating unit 6 can be controlled in more detail and accurately. It is advantageous to apply to. At this time, the rotation of the rotating shaft 2 (the number of rotations and the start and stop of rotation) may be appropriately controlled.

未加硫タイヤ内面のうち、離型剤Ｌを塗布する範囲と塗布しない範囲を区分する塗布範囲データを予め制御部１０に入力し、この塗布範囲データに基づいて、制御部１０により、離型剤Ｌを塗布する範囲のみに離型剤Ｌが供給された塗布部６を接触させることもできる。即ち、塗布範囲データに基づいて、塗布アーム３の回転軸２の軸方向の移動および回転軸２の半径方向の伸縮を制御して塗布部６を、未加硫タイヤ内面の所望に位置に接触させる。   Of the unvulcanized tire inner surface, application range data for dividing the range where the release agent L is applied and the range where the release agent L is not applied is input to the control unit 10 in advance, and the release is performed by the control unit 10 based on the application range data. The application part 6 to which the release agent L is supplied can also be brought into contact only in the range where the agent L is applied. That is, based on the application range data, the application arm 6 is brought into contact with the desired position on the inner surface of the unvulcanized tire by controlling the movement of the application arm 3 in the axial direction of the rotary shaft 2 and the expansion and contraction in the radial direction of the rotary shaft 2. Let

これにより、所望の範囲のみに離型剤Ｌを自動化して塗布することが可能になる。例えば、離型剤Ｌを塗布しない範囲として未加硫タイヤ内面のスプライス部を設定しておけば、スプライス部にＬＬが塗布されることを回避できる。この際に、回転軸２の回転（回転数や回転開始および停止）も適宜、制御するとよい。   Thereby, it becomes possible to apply | coat the mold release agent L only to a desired range by automating. For example, if the splice portion on the inner surface of the unvulcanized tire is set as a range where the release agent L is not applied, it is possible to avoid applying LL to the splice portion. At this time, the rotation of the rotating shaft 2 (the number of rotations and the start and stop of rotation) may be appropriately controlled.

図４、図５に例示したタイプの塗布部６を用いると、断面形状が凹凸状で複雑なサイド内面であっても、離型剤Ｌを均質に塗布することができる。この実施形態では、上から２番目および３番目の塗布アーム３によりトレッド内面に離型剤Ｌを塗布し、上から１番目の塗布アーム３が上側サイド内面、上から４番目の塗布アーム３が下側サイド内面に離型剤Ｌを塗布する。塗布アーム３が３つの場合は、真中の塗布アーム３によりトレッド内面に離型剤Ｌを塗布し、上側の塗布アーム３が上側サイド内面、下側の塗布アーム３が下側サイド内面に離型剤Ｌを塗布することになる。   If the application part 6 of the type illustrated in FIGS. 4 and 5 is used, the release agent L can be uniformly applied even if the cross-sectional shape is a concavo-convex shape and a complicated side inner surface. In this embodiment, the release agent L is applied to the inner surface of the tread by the second and third coating arms 3 from the top, the first coating arm 3 from the top is the upper side inner surface, and the fourth coating arm 3 from the top is A release agent L is applied to the inner surface of the lower side. When there are three coating arms 3, the middle coating arm 3 applies the release agent L to the inner surface of the tread, the upper coating arm 3 is released from the upper side inner surface, and the lower coating arm 3 is released from the lower side inner surface. The agent L is applied.

図６に例示したタイプの塗布部６を用いると、塗布部６が未加硫タイヤ内面の形状（複雑な形状や表面の凹凸）に追従し易くなる。そのため、離型剤Ｌを全体的に均質に塗布するには有利になる。   If the application part 6 of the type illustrated in FIG. 6 is used, the application part 6 can easily follow the shape of the unvulcanized tire inner surface (complex shape and surface irregularities). Therefore, it is advantageous to apply the release agent L uniformly throughout.

未加硫タイヤの開口を閉じない状態で離型剤をスプレー噴霧して塗布する比較例１と、未加硫タイヤの開口を閉じた状態で離型剤をスプレー噴霧して塗布する比較例２と、図１に例示した構造の塗布装置を用いて、塗布部を未加硫タイヤ内面に接触させて離型剤を塗布する実施例とで、未加硫タイヤ内面以外への離型剤の飛散程度および未加硫タイヤ内面での液ダレの程度を評価した。その結果を表１に示す。離型剤の飛散程度および未加硫タイヤ内面での液ダレの程度は、比較例１を基準の１００として指数評価した。指数の数値が小さい程、飛散量が少なく、液ダレ量が少ないことを示す。   Comparative Example 1 in which the release agent is spray sprayed and applied without closing the opening of the unvulcanized tire, and Comparative Example 2 in which the release agent is sprayed and applied with the opening of the unvulcanized tire closed. And an example in which a release agent is applied by bringing the application portion into contact with the inner surface of the unvulcanized tire using the application apparatus having the structure illustrated in FIG. 1. The degree of splash and the degree of dripping on the inner surface of the unvulcanized tire were evaluated. The results are shown in Table 1. The degree of splashing of the release agent and the degree of sag on the inner surface of the unvulcanized tire were evaluated by an index with Comparative Example 1 being 100 as a reference. The smaller the numerical value of the index, the smaller the scattering amount and the less the liquid dripping amount.

Figure 2014195873
Figure 2014195873

表１の結果から、実施例は離型剤の飛散および液ダレがなく、比較例１および２に比して離型剤の飛散および液ダレの抑制に著しく優れていることが分かる。   From the results of Table 1, it can be seen that the examples have no release agent splatter and liquid sag, and are significantly superior to Comparative Examples 1 and 2 in suppressing the release agent splatter and liquid sag.

１ 塗布装置
２ 回転軸
３ 塗布アーム
４ アーム駆動部
５ アーム部
６ 塗布部
６ａ 付勢部材
７ 供給路
８ ベース
９ 回転駆動部
１０ 制御部
Ｌ 離型剤
Ｔ 未加硫タイヤ DESCRIPTION OF SYMBOLS 1 Application | coating apparatus 2 Rotating shaft 3 Application | coating arm 4 Arm drive part 5 Arm part 6 Application | coating part 6a Energizing member 7 Supply path 8 Base 9 Rotation drive part 10 Control part L Mold release agent T Unvulcanized tire

Claims (7)

未加硫タイヤの内側に配置される未加硫タイヤ内面への離型剤の塗布装置であって、前記未加硫タイヤのタイヤ軸方向を軸方向にして設置される回転軸と、この回転軸の軸方向に隣り合って取付けられた少なくとも３つの塗布アームと、それぞれの塗布アームに離型剤を供給する供給手段とを備え、それぞれの塗布アームは、先端に塗布部を有するとともに、前記回転軸の軸方向に移動可能、かつ、前記回転軸の半径方向に伸縮可能であり、前記離型剤が供給された塗布部を未加硫タイヤ内面に接触させる構成にしたことを特徴とする未加硫タイヤ内面への離型剤の塗布装置。   A device for applying a release agent to the inner surface of an unvulcanized tire disposed inside an unvulcanized tire, the rotation shaft being installed with the tire axial direction of the unvulcanized tire as an axial direction, and the rotation At least three coating arms attached adjacent to each other in the axial direction of the shaft, and supply means for supplying a release agent to each coating arm, each coating arm having a coating portion at the tip, It is possible to move in the axial direction of the rotating shaft, and to expand and contract in the radial direction of the rotating shaft, and to be configured to contact the coating portion supplied with the release agent with the inner surface of the unvulcanized tire. A device for applying a release agent to the inner surface of an unvulcanized tire. 前記未加硫タイヤ内面の形状データが予め入力されるとともに、それぞれの塗布アームの動作を制御する制御部を設け、この形状データに基づいて、それぞれの塗布アームの前記回転軸の軸方向の移動および半径方向の伸縮を制御する請求項１に記載の未加硫タイヤ内面への離型剤の塗布装置。   The shape data of the inner surface of the unvulcanized tire is inputted in advance, and a control unit for controlling the operation of each coating arm is provided. Based on this shape data, the axial movement of the rotating shaft of each coating arm is provided. The apparatus for applying a release agent to the inner surface of the unvulcanized tire according to claim 1 which controls expansion and contraction in the radial direction. 前記制御部に、前記未加硫タイヤ内面のうち、離型剤を塗布する範囲と塗布しない範囲を区分する塗布範囲データを予め入力しておき、この塗布範囲データに基づいて、前記離型剤を塗布する範囲のみに前記離型剤が供給された塗布部を接触させる構成にした請求項２に記載の未加硫タイヤ内面への離型剤の塗布装置。   In the control unit, application range data for dividing a range in which the release agent is applied and a range in which the release agent is not applied is input in advance in the inner surface of the unvulcanized tire, and the release agent is based on the application range data. The apparatus for applying a release agent to the inner surface of an unvulcanized tire according to claim 2, wherein the application portion to which the release agent is supplied is brought into contact only within a range where the release agent is applied. 前記塗布部を塗布アームの先方へ付勢する付勢部材を設けた請求項１〜３のいずれかに記載の未加硫タイヤ内面への離型剤の塗布装置。   The device for applying a release agent to the inner surface of the unvulcanized tire according to any one of claims 1 to 3, further comprising an urging member that urges the application portion toward the tip of the application arm. 少なくとも３つの塗布アームが軸方向に隣り合って取付けられた回転軸を、その軸方向をタイヤ軸方向として、未加硫タイヤの内側に配置し、次いで、それぞれの塗布アームを前記回転軸の半径方向に伸長させて、塗布アームの先端に取り付けた塗布部を未加硫タイヤ内面に接触させ、前記回転軸を回転させながら、前記塗布アームを少なくとも前記回転軸の軸方向に移動させて、前記塗布部に供給された離型剤を未加硫タイヤ内面に塗布することを特徴とする未加硫タイヤ内面への離型剤の塗布方法。   A rotating shaft having at least three coating arms mounted adjacent to each other in the axial direction is disposed inside the unvulcanized tire with the axial direction as the tire axial direction, and then each coating arm is arranged with a radius of the rotating shaft. The coating portion attached to the tip of the coating arm is brought into contact with the inner surface of the unvulcanized tire, and while rotating the rotating shaft, the coating arm is moved at least in the axial direction of the rotating shaft, A method for applying a release agent to an inner surface of an unvulcanized tire, wherein the release agent supplied to the application portion is applied to the inner surface of the unvulcanized tire. 前記未加硫タイヤ内面の形状データを予め制御部に入力し、この形状データに基づいて、前記制御部により、それぞれの塗布アームの少なくとも前記回転軸の軸方向の移動を制御する請求項５に記載の未加硫タイヤ内面への離型剤の塗布方法。   The shape data of the inner surface of the unvulcanized tire is input to a control unit in advance, and based on the shape data, the control unit controls movement of at least the rotation shaft of each coating arm in the axial direction. A method for applying a release agent to the inner surface of the unvulcanized tire as described. 前記未加硫タイヤ内面のうち、離型剤を塗布する範囲と塗布しない範囲を区分する塗布範囲データを予め前記制御部に入力し、この塗布範囲データに基づいて、前記制御部により、前記離型剤を塗布する範囲のみに前記離型剤が供給された塗布部を接触させる請求項６に記載の未加硫タイヤ内面への離型剤の塗布方法。   Out of the unvulcanized tire inner surface, application range data for distinguishing a range where the release agent is applied and a range where the release agent is not applied is input to the control unit in advance, and the control unit performs the release based on the application range data. The method for applying a release agent to the inner surface of an unvulcanized tire according to claim 6, wherein the application portion to which the release agent is supplied is brought into contact only in a range where the mold agent is applied.
JP2013071503A 2013-03-29 2013-03-29 Coating applicator and method of mold release agent to unvulcanization tire inner surface Pending JP2014195873A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021030508A (en) * 2019-08-20 2021-03-01 横浜ゴム株式会社 Device and method for applying release agent to unvulcanized tire inner face
CN115674552A (en) * 2022-12-24 2023-02-03 南通超达装备股份有限公司 Automobile headrest foaming mold capable of uniformly spraying release agent

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2021030508A (en) * 2019-08-20 2021-03-01 横浜ゴム株式会社 Device and method for applying release agent to unvulcanized tire inner face
JP7302371B2 (en) 2019-08-20 2023-07-04 横浜ゴム株式会社 Apparatus and method for applying release agent to inner surface of unvulcanized tire
CN115674552A (en) * 2022-12-24 2023-02-03 南通超达装备股份有限公司 Automobile headrest foaming mold capable of uniformly spraying release agent

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