JP6705221B2 - Device and method for applying release agent - Google Patents

Device and method for applying release agent Download PDF

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JP6705221B2
JP6705221B2 JP2016045255A JP2016045255A JP6705221B2 JP 6705221 B2 JP6705221 B2 JP 6705221B2 JP 2016045255 A JP2016045255 A JP 2016045255A JP 2016045255 A JP2016045255 A JP 2016045255A JP 6705221 B2 JP6705221 B2 JP 6705221B2
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release agent
outer peripheral
transfer roller
peripheral surface
roller
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JP2017159526A (en
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翼 劉
翼 劉
松村　謙介
謙介 松村
孝充 野田
孝充 野田
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Yokohama Rubber Co Ltd
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Description

本発明は、離型剤の塗布装置および方法に関し、さらに詳しくは、離型剤を周囲に飛散させることなく、筒状体の表面に対してムラなく塗布できる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 a release agent coating apparatus and method, and more particularly to a release agent coating apparatus and method capable of uniformly coating a surface of a cylindrical body without scattering the release agent around. It is a thing.

タイヤ等のゴム製品を製造する際には、未加硫ゴムにより形成された筒状の成形体をモールドの内部で加硫する。この加硫工程では、成形体の内部で加硫ブラダを膨張させて成形体を加圧する。加硫が終了した後は、加硫ブラダを収縮させて加硫済の成形体の内周面から引き離す。ここで、加硫ブラダを加硫済の成形体から引き離し易くするために、加硫前に加硫ブラダの外周面や成形体の内周面に離型剤を塗布している。 When manufacturing a rubber product such as a tire, a cylindrical molded body made of unvulcanized rubber is vulcanized inside a mold. In this vulcanization step, the vulcanization bladder is expanded inside the molded body to press the molded body. After the vulcanization is completed, the vulcanization bladder is contracted and separated from the inner peripheral surface of the vulcanized molded body. Here, in order to easily separate the vulcanized bladder from the vulcanized molded body, a mold release agent is applied to the outer peripheral surface of the vulcanized bladder and the inner peripheral surface of the molded body before vulcanization.

従来、加硫ブラダに塗布する離型剤が周囲に飛散することを防止するために、種々の塗布装置が提案されている（例えば、特許文献１参照）。特許文献１で提案されている塗布装置では、加硫ブラダの表面に接触して離型剤を塗布する塗布部材を設けることにより離型剤の飛散を防止している。この塗布装置では、塗布部材と加硫ブラダ表面の少なくとも一方に対して、供給量がコントロールされて離型剤が供給される。そして、塗布部材と加硫ブラダの少なくとも一方を、加硫ブラダの軸を中心にして回転させるとともに、軸方向に沿って移動させることにより、離型剤を加硫ブラダの外周面に塗布する。 Conventionally, various coating devices have been proposed in order to prevent the release agent applied to the vulcanization bladder from scattering around (for example, refer to Patent Document 1). The coating device proposed in Patent Document 1 prevents the release agent from scattering by providing a coating member that comes into contact with the surface of the vulcanization bladder and applies the release agent. In this coating device, the release agent is supplied to at least one of the coating member and the surface of the vulcanization bladder by controlling the supply amount. Then, at least one of the coating member and the vulcanization bladder is rotated about the axis of the vulcanization bladder and is moved along the axial direction to apply the release agent to the outer peripheral surface of the vulcanization bladder.

しかしながら、離型剤の塗布対象となる加硫ブラダの表面や、加硫ブラダに直接接触する塗布部材に直接的に離型剤を供給する方法では、離型剤の供給量のバラツキが、加硫ブラダ表面への塗布量のバラツキに直結する。また、離型剤を塗布する際に、加硫ブラダをその軸を中心にして回転させると、加硫ブラダ表面に塗布された離型剤が遠心力によって流動するため、ムラなく離型剤を塗布するには不利になる。それ故、加硫ブラダ表面に対してムラなく離型剤を塗布するには改善の余地がある。 However, in the method of directly supplying the release agent to the surface of the vulcanization bladder to which the release agent is applied or the coating member that is in direct contact with the vulcanization bladder, variations in the supply amount of the release agent may be It is directly related to the variation in the coating amount on the surface of the sulfur bladder. When the vulcanization bladder is rotated about its axis when applying the release agent, the release agent applied to the surface of the vulcanization bladder flows due to the centrifugal force, so that the release agent is evenly applied. It is disadvantageous to apply. Therefore, there is room for improvement in uniformly applying the release agent to the surface of the vulcanized bladder.

特開２００４−３０６２７３号公報JP 2004-306273 A

本発明の目的は、離型剤を周囲に飛散させることなく、筒状体の表面に対してムラなく塗布できる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 provide a releasing agent coating apparatus and method capable of uniformly coating the surface of a cylindrical body without scattering the releasing agent around.

上記目的を達成するため本発明の離型剤の塗布装置は、塗布位置と待機位置との間を移動する転写ローラと、前記待機位置に配置されている供給ローラと、この供給ローラに離型剤を供給する供給部とを備えて、前記待機位置では前記供給ローラと前記転写ローラとが外周面どうしを当接させて互いに自転することにより、前記供給ローラの外周面から前記転写ローラの外周面に前記離型剤が供給され、前記塗布位置では前記転写ローラの外周面を、静止している筒状体の外周面または内周面に接触させた状態で、前記転写ローラを自転させつつ前記筒状体を中心にして公転させることにより、前記離型剤が前記筒状体の表面に塗布される構成にしたことを特徴とする。 In order to achieve the above-mentioned object, a release agent coating apparatus of the present invention is a transfer roller that moves between a coating position and a standby position, a supply roller disposed at the standby position, and a release roller for the supply roller. A supply unit for supplying the agent, and at the standby position, the supply roller and the transfer roller are rotated around each other by bringing their outer peripheral surfaces into contact with each other so that the outer peripheral surface of the supply roller and the outer peripheral surface of the transfer roller. The release agent is supplied to the surface, and while the outer peripheral surface of the transfer roller is in contact with the outer peripheral surface or the inner peripheral surface of the stationary cylindrical body at the coating position, the transfer roller is rotated. It is characterized in that the mold release agent is applied to the surface of the tubular body by revolving around the tubular body.

本発明の離型剤の塗布方法は、待機位置で、離型剤が供給された供給ローラと転写ローラとを外周面どうしを当接させて互いに自転させることにより、前記供給ローラの外周面から前記転写ローラの外周面に前記離型剤を供給し、次いで、前記転写ローラを塗布位置に移動させて前記転写ローラの外周面を、静止している筒状体の外周面または内周面に接触させた状態にして、この状態で、前記転写ローラを自転させつつ前記筒状体を中心にして公転させることにより、前記離型剤を前記筒状体の表面に塗布することを特徴とする。 The method for applying a release agent according to the present invention is such that, at the standby position, the supply roller and the transfer roller to which the release agent is supplied are rotated from each other by bringing their outer peripheral surfaces into contact with each other so as to rotate from each other. The release agent is supplied to the outer peripheral surface of the transfer roller, and then the transfer roller is moved to the coating position so that the outer peripheral surface of the transfer roller becomes the outer peripheral surface or the inner peripheral surface of the stationary cylindrical body. In a state of being in contact with each other, in this state, the transfer roller is revolved to revolve around the tubular body, so that the release agent is applied to the surface of the tubular body. ..

本発明によれば、筒状体の表面（外周面または内周面）に離型剤を塗布する際に、筒状体の表面に直接接触する転写ローラに離型剤を直接供給するのではなく、供給ローラを介在させて供給する。そのため、供給ローラが離型剤の供給量を調節するバッファとして機能し、転写ローラの外周面にムラなく離型剤を供給し易くなる。 According to the present invention, when the release agent is applied to the surface (outer peripheral surface or inner peripheral surface) of the tubular body, the release agent is not directly supplied to the transfer roller that is in direct contact with the surface of the tubular body. Instead, supply is performed with a supply roller interposed. Therefore, the supply roller functions as a buffer for adjusting the supply amount of the release agent, and the release agent can be easily supplied to the outer peripheral surface of the transfer roller without unevenness.

さらに、この転写ローラの外周面を、静止している筒状体の表面に接触させた状態にして、転写ローラを筒状体を中心にして公転させつつ自転させるので、筒状体が回転、移動することがない。これにより、筒状体の表面に塗布された離型剤には遠心力が作用しないので不要な流動が生じることがない。それ故、転写ローラの外周面にムラなく離型剤が供給されることとの相乗効果によって、筒状体の表面に対してムラなく離型剤を塗布するには益々有利になる。しかも、転写ローラの外周面が直接、筒状体の表面に接触して離型剤を塗布するので、離型剤が周囲に飛散することも防止できる。 Furthermore, since the outer peripheral surface of this transfer roller is brought into contact with the surface of the stationary cylindrical body and the transfer roller is rotated while revolving around the cylindrical body, the cylindrical body rotates, It never moves. As a result, centrifugal force does not act on the release agent applied to the surface of the tubular body, so that unnecessary flow does not occur. Therefore, the synergistic effect that the release agent is uniformly supplied to the outer peripheral surface of the transfer roller makes it even more advantageous to uniformly apply the release agent to the surface of the cylindrical body. Moreover, since the outer peripheral surface of the transfer roller directly contacts the surface of the cylindrical body to apply the release agent, it is possible to prevent the release agent from scattering around.

転写ローラが待機位置にある本発明の離型剤の塗布装置を側面視で例示する説明図である。FIG. 5 is an explanatory view illustrating a side view of the release agent applying device of the present invention in which the transfer roller is at the standby position. 図１の供給ローラ、転写ローラおよび筒状体を平面視で例示する説明図である。It is explanatory drawing which illustrates the supply roller of FIG. 1, a transfer roller, and a cylindrical body in planar view. 転写ローラが塗布位置にある本発明の離型剤の塗布装置を側面視で例示する説明図である。FIG. 3 is an explanatory view illustrating a side view of a release agent application device of the present invention in which a transfer roller is in an application position. 図３の転写ローラの動きを平面視で例示する説明図である。FIG. 4 is an explanatory diagram illustrating the movement of the transfer roller of FIG. 3 in plan view. 本発明の離型剤の塗布装置の別の実施形態を側面視で例示する説明図である。It is explanatory drawing which illustrates another embodiment of the release agent coating device of this invention by a side view. 転写ローラが塗布位置にある図５の塗布装置を側面視で例示する説明図である。It is explanatory drawing which illustrates the coating device of FIG. 5 in which a transfer roller is in a coating position from a side view.

以下、本発明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, the apparatus and method for applying the release agent of the present invention will be described based on the embodiments shown in the drawings.

図１、２に例示する本発明の離型剤の塗布装置１は、離型剤Ｓを塗布する対象となる円筒の筒状体１５が加硫ブラダになっている。筒状体１５は開口を上下にして保持具１６によって横置き状態で保持されている。 In the release agent coating device 1 of the present invention illustrated in FIGS. 1 and 2, the cylindrical tubular body 15 to which the release agent S is applied is a vulcanization bladder. The tubular body 15 is horizontally held by a holder 16 with the opening being opened vertically.

筒状体１５が加硫ブラダの場合は、筒状体１５に５ｋＰａ程度の小さな内圧を負荷して膨張変形していない中立の状態を維持する。この筒状体１５において離型剤Ｓを塗布する範囲は、所定の幅寸法Ｗｂで周方向全周になっている。 When the tubular body 15 is a vulcanized bladder, a small internal pressure of about 5 kPa is applied to the tubular body 15 to maintain a neutral state in which it is not expanded and deformed. The range in which the release agent S is applied on the tubular body 15 is the entire circumference in the circumferential direction with a predetermined width dimension Wb.

塗布装置１は、転写ローラ２と、供給ローラ８と、供給ローラ８に離型剤Ｓを供給する供給部１２とを備えている。供給部１２は、離型剤Ｓを収容しているタンク１２ａと、離型剤Ｓをタンク１２ａから送り出すポンプ１２ｂと、ポンプ１２ｂに接続された配管１２ｃとを有している。この実施形態の供給部１２はさらに、供給ローラ８の下方に配置されている受け部１２ｄを有している。 The coating device 1 includes a transfer roller 2, a supply roller 8, and a supply unit 12 that supplies the release agent S to the supply roller 8. The supply unit 12 has a tank 12a containing the release agent S, a pump 12b for delivering the release agent S from the tank 12a, and a pipe 12c connected to the pump 12b. The supply unit 12 of this embodiment further includes a receiving unit 12d arranged below the supply roller 8.

供給ローラ８は円筒状であり、待機位置ＷＰに配置されている。供給ローラ８は上下に延在する中心軸１０に固定されている。この中心軸１０は、伝動ベルトやギヤ等を介して駆動モータ１１によって回転駆動される。供給ローラ８の外周部分は所定の一定厚さのスポンジ状部材９で形成されている。配管１２ｃの先端部が供給ローラ８の上方に配置されている。 The supply roller 8 has a cylindrical shape and is arranged at the standby position WP. The supply roller 8 is fixed to a central shaft 10 extending vertically. The central shaft 10 is rotationally driven by a drive motor 11 via a transmission belt, gears and the like. The outer peripheral portion of the supply roller 8 is formed of a sponge-like member 9 having a predetermined constant thickness. The tip of the pipe 12c is arranged above the supply roller 8.

この実施形態では、さらに、供給ローラ８の上端と側面とに、スポンジ状部材９に接触する維持機構１３が配置されている。維持機構１３としては例えばスクレーパ等を用いることができる。 In this embodiment, further, a maintaining mechanism 13 that contacts the sponge-like member 9 is arranged on the upper end and the side surface of the supply roller 8. As the maintenance mechanism 13, for example, a scraper or the like can be used.

転写ローラ２は円筒状であり、上下に延在する中心軸４に固定されていて、外周部分は所定の一定厚さのスポンジ状部材３で形成されている。このスポンジ状部材３には供給ローラ８のスポンジ状部材９と同じ材料を用いることができる。転写ローラ２のローラ幅Ｗｒは、上述した幅寸法Ｗｂ以上の大きさに設定されている。また、このローラ幅Ｗｒは供給ローラ８のローラ幅Ｗｓよりも小さく、もしくは、同じ寸法に設定されている。この実施形態では、転写ローラ２の外径は供給ローラ８の外径よりも小さくなっている。 The transfer roller 2 has a cylindrical shape, is fixed to a vertically extending central shaft 4, and an outer peripheral portion is formed of a sponge-like member 3 having a predetermined constant thickness. The same material as the sponge-like member 9 of the supply roller 8 can be used for this sponge-like member 3. The roller width Wr of the transfer roller 2 is set to be larger than the width dimension Wb described above. The roller width Wr is smaller than or equal to the roller width Ws of the supply roller 8. In this embodiment, the outer diameter of the transfer roller 2 is smaller than the outer diameter of the supply roller 8.

中心軸４は移動機構７に接続されていてフリーに自転可能になっている。この移動機構７によって、転写ローラ２は待機位置ＷＰと塗布位置ＰＰとの間を移動可能になっている。移動機構７としてはエアシリンダや油圧シリンダ等を用いることができる。 The central shaft 4 is connected to a moving mechanism 7 so that it can rotate freely. The moving mechanism 7 allows the transfer roller 2 to move between the standby position WP and the coating position PP. An air cylinder, a hydraulic cylinder, or the like can be used as the moving mechanism 7.

転写ローラ２は移動機構７とともに、上下に延在する公転軸５に取り付けられている。この公転軸５はフレーム１４に保持されていて、伝動ベルトやギヤ等を介して駆動モータ６によって回転駆動される。平面視で公転軸５の軸心と筒状体１５の中心位置ＣＬとは同じ位置にある。したがって、駆動モータ６によって、転写ローラ２は筒状体１５を中心にして公転する。 The transfer roller 2 is attached to a revolving shaft 5 extending vertically along with a moving mechanism 7. The revolution shaft 5 is held by a frame 14 and is rotationally driven by a drive motor 6 via a transmission belt, gears and the like. In plan view, the axis of the revolution shaft 5 and the center position CL of the tubular body 15 are at the same position. Therefore, the transfer roller 2 revolves around the cylindrical body 15 by the drive motor 6.

次に、この塗布装置１を用いて筒状体１５の外周面に離型剤Ｓを塗布する方法を説明する。 Next, a method of applying the release agent S to the outer peripheral surface of the cylindrical body 15 using this coating apparatus 1 will be described.

図１、２に例示する供給ローラ８に対して、供給部１２から離型剤Ｓを所定流量で供給する。供給された離型剤Ｓは、配管１２ｃの先端から供給ローラ８の上面に滴下される。ここで、中心軸１０を中心にして供給ローラ８を自転させて離型剤Ｓを上方から下方に流下させる。この過程でスポンジ状部材９に離型剤Ｓが吸収される。スポンジ状部材９に保持できる離型剤Ｓの量は所定量に限られている。したがって、離型剤Ｓを供給し続けることで、その所定量の離型剤Ｓをスポンジ状部材９に保持させる。 The release agent S is supplied from the supply unit 12 to the supply roller 8 illustrated in FIGS. The supplied release agent S is dripped onto the upper surface of the supply roller 8 from the tip of the pipe 12c. Here, the supply roller 8 is rotated about the central axis 10 to cause the release agent S to flow downward from above. In this process, the release agent S is absorbed by the sponge-like member 9. The amount of the release agent S that can be held on the sponge-like member 9 is limited to a predetermined amount. Therefore, by continuing to supply the release agent S, the predetermined amount of the release agent S is held by the sponge-like member 9.

スポンジ部材９に吸収、保持されない離型剤Ｓは流下して、受け部１２ｄに受け止められた後にタンク１２ａに注入される。したがって、離型剤Ｓは無駄にならずに繰り返し使用することができる。 The release agent S that is not absorbed or retained by the sponge member 9 flows down, is received by the receiving portion 12d, and then is injected into the tank 12a. Therefore, the release agent S can be repeatedly used without being wasted.

この実施形態では、スポンジ状部材９に吸収しきれない離型剤Ｓが維持機構１３によって剥ぎ落とされる。したがって、維持機構１３は、供給ローラ８の外周面に保持される離型剤Ｓの量を一定範囲に維持するように機能する。維持機構１３によって、迅速かつ精度よく所定量の離型剤Ｓがスポンジ状部材９に保持される。スポンジ状部材９に所定量の離型剤Ｓが保持されるまでは、転写ローラ２は供給ローラ８に当接しない位置に配置しておく。 In this embodiment, the release agent S that cannot be completely absorbed by the sponge-like member 9 is peeled off by the maintenance mechanism 13. Therefore, the maintaining mechanism 13 functions to maintain the amount of the release agent S held on the outer peripheral surface of the supply roller 8 within a certain range. The maintaining mechanism 13 quickly and accurately holds a predetermined amount of the release agent S on the sponge-like member 9. The transfer roller 2 is arranged at a position where it does not contact the supply roller 8 until the sponge-like member 9 holds a predetermined amount of the release agent S.

スポンジ状部材９に所定量の離型剤Ｓが保持された後は、転写ローラ２を待機位置ＷＰに移動させてその外周面を供給ローラ８の外周面に当接させる。供給ローラ８のローラ幅Ｗｓは転写ローラ２のローラ幅Ｗｒよりも大きいので、転写ローラ２の外周面が供給ローラ８の外周面の幅方向にはみ出さないように、互いの外周面を当接させる。 After the sponge-like member 9 holds a predetermined amount of the release agent S, the transfer roller 2 is moved to the standby position WP and the outer peripheral surface thereof is brought into contact with the outer peripheral surface of the supply roller 8. Since the roller width Ws of the supply roller 8 is larger than the roller width Wr of the transfer roller 2, the outer peripheral surfaces of the transfer roller 2 contact each other so that the outer peripheral surface of the transfer roller 2 does not protrude in the width direction of the outer peripheral surface of the supply roller 8. Let

ここで、転写ローラ２は中心軸４を中心にしてフリーに自転するので、供給ローラ８を自転させることにより転写ローラ２も自転する。これにより、供給ローラ８の外周面から転写ローラ２の外周面に離型剤Ｓが供給される。即ち、転写ローラ２のスポンジ状部材３が離型剤Ｓを吸収、保持する。中心軸４、１０どうしの水平間隔を一定に維持して、転写ローラ２を所定回数以上自転させることで、スポンジ状部材３には、ローラ幅方向および周方向にバラツキなく万遍に離型剤Ｓが保持される。この工程でも供給部１２から供給ローラ８に離型剤Ｓを供給し続けるとよい。 Here, since the transfer roller 2 is free to rotate about the central axis 4, the transfer roller 2 is also rotated by rotating the supply roller 8. As a result, the release agent S is supplied from the outer peripheral surface of the supply roller 8 to the outer peripheral surface of the transfer roller 2. That is, the sponge-like member 3 of the transfer roller 2 absorbs and holds the release agent S. By maintaining the horizontal interval between the central shafts 4 and 10 constant and rotating the transfer roller 2 a predetermined number of times or more, the sponge-like member 3 is uniformly distributed in the roller width direction and the circumferential direction without unevenness. S is retained. Also in this step, the release agent S may be continuously supplied from the supply unit 12 to the supply roller 8.

転写ローラ２と供給ローラ８とが外周面どうしを当接させている時は、転写ローラ２および供給ローラ８を常に自転させるとよい。転写ローラ２および供給ローラ８が自転していない状態で互いの外周面どうしが当接していると、その当接位置でスポンジ状部材３は相対的に多量の離型剤Ｓを吸収、保持することになる。それ故、互いの外周面を当接させている転写ローラ２および供給ローラ８を常に自転させることにより、一段とバラツキなく万遍にスポンジ状部材３に離型剤Ｓを保持させるには有利になる。 When the transfer roller 2 and the supply roller 8 are in contact with each other at their outer peripheral surfaces, it is preferable that the transfer roller 2 and the supply roller 8 always rotate. If the outer peripheral surfaces of the transfer roller 2 and the supply roller 8 are in contact with each other without rotating, the sponge-like member 3 absorbs and holds a relatively large amount of the release agent S at the contact position. It will be. Therefore, by constantly rotating the transfer roller 2 and the supply roller 8 whose outer peripheral surfaces are in contact with each other, it is advantageous to allow the sponge-like member 3 to hold the release agent S evenly and uniformly. ..

次いで、図３に例示するように、転写ローラ２を塗布位置ＰＰに移動させて、その外周面を、静止している筒状体１５の外周面に接触させた状態にする。転写ローラ２のローラ幅Ｗｒは、筒状体１５の離型剤Ｓを塗布する範囲の幅寸法Ｗｂ以上であるが、この塗布範囲が転写ローラ２の外周面の幅方向にはみ出さないように、転写ローラ２の外周面を筒状体１５の外周面に当接させる。 Next, as illustrated in FIG. 3, the transfer roller 2 is moved to the coating position PP, and the outer peripheral surface thereof is brought into contact with the outer peripheral surface of the stationary cylindrical body 15. The roller width Wr of the transfer roller 2 is equal to or larger than the width dimension Wb of the range where the mold release agent S of the cylindrical body 15 is applied. The outer peripheral surface of the transfer roller 2 is brought into contact with the outer peripheral surface of the tubular body 15.

この状態で、図４に例示するように、転写ローラ２を公転軸５を中心にして公転させる。転写ローラ２は中心軸４を中心にしてフリーに自転するので、転写ローラ２は筒状体１５の外周面上を転動する。即ち、転写ローラ２は、筒状体１５を中心にして公転しつつ自転する。 In this state, as illustrated in FIG. 4, the transfer roller 2 revolves around the revolution shaft 5. Since the transfer roller 2 freely rotates about the central axis 4, the transfer roller 2 rolls on the outer peripheral surface of the tubular body 15. That is, the transfer roller 2 revolves around the tubular body 15 while revolving.

これにより、スポンジ状部材３が保持していた離型剤Ｓは、筒状体１５の外周面に転写されるように塗布される。中心軸４と公転軸５との水平間隔が一定に維持されているので、転写ローラ２を１回転以上公転させることにより、筒状体１５の外周面の幅寸法Ｗｂの周方向全周に離型剤Ｓを幅方向および周方向にバラツキなく万遍に塗布することができる。転写ローラ２は例えば、２〜３回転程度公転させた後、その外周面を筒状体１５の外周面から分離させる。 As a result, the release agent S held by the sponge member 3 is applied so as to be transferred to the outer peripheral surface of the tubular body 15. Since the horizontal distance between the central shaft 4 and the revolution shaft 5 is maintained constant, the transfer roller 2 is revolved one revolution or more to separate the width of the outer peripheral surface of the tubular body 15 in the entire circumferential direction Wb. The mold agent S can be evenly applied in the width direction and the circumferential direction without variations. For example, the transfer roller 2 revolves about 2 to 3 times, and then the outer peripheral surface thereof is separated from the outer peripheral surface of the tubular body 15.

このように本発明によれば、筒状体１５の外周面に離型剤Ｓを塗布する際に、筒状体１５の外周面に直接接触する転写ローラ２に対して、供給ローラ８を介在させて間接的に離型剤Ｓを供給する。これに伴い、供給ローラ８が離型剤Ｓの供給量を調節するバッファとして機能するので、転写ローラ８の外周面にムラなく離型剤Ｓを供給するには有利になっている。 As described above, according to the present invention, when the release agent S is applied to the outer peripheral surface of the cylindrical body 15, the supply roller 8 is interposed between the transfer roller 2 and the outer peripheral surface of the cylindrical body 15 that are in direct contact with each other. Then, the release agent S is indirectly supplied. Along with this, the supply roller 8 functions as a buffer for adjusting the supply amount of the release agent S, which is advantageous for supplying the release agent S to the outer peripheral surface of the transfer roller 8 evenly.

加えて、静止している筒状体１５の外周面に転写ローラ２の外周面を接触させた状態にして、転写ローラ２を筒状体１５を中心にして公転させつつ自転させる。即ち、筒状体１５が回転、移動することがないので、筒状体１５の外周面に既に塗布された離型剤Ｓには遠心力が作用することがなく不要な流動が生じない。それ故、供給ローラ８の外周面へのムラのない離型剤Ｓの供給との相乗効果によって、筒状体１５の表面に対してムラなく離型剤Ｓを塗布するには益々有利になっている。また、転写ローラ２の外周面を直接、筒状体１５の外周面に接触させて離型剤Ｓを塗布するので、離型剤Ｓが周囲に飛散することもない。 In addition, with the outer peripheral surface of the stationary cylindrical body 15 in contact with the outer peripheral surface of the transfer roller 2, the transfer roller 2 revolves around the cylindrical body 15 while revolving. That is, since the tubular body 15 does not rotate or move, centrifugal force does not act on the release agent S already applied to the outer peripheral surface of the tubular body 15, and unnecessary flow does not occur. Therefore, due to the synergistic effect of supplying the release agent S to the outer peripheral surface of the supply roller 8 without unevenness, it becomes more and more advantageous to apply the release agent S to the surface of the tubular body 15 evenly. ing. Further, since the outer peripheral surface of the transfer roller 2 is directly brought into contact with the outer peripheral surface of the cylindrical body 15 to apply the release agent S, the release agent S does not scatter around.

図５、６に例示する塗布装置１の別の実施形態では、離型剤Ｓを塗布する対象となる円筒の筒状体１５がグリーンタイヤになっている。筒状体１５は開口を上下にして保持具１６によって横置き状態で保持されている。この筒状体１５の内周面に離型剤Ｓが塗布される。 In another embodiment of the coating apparatus 1 illustrated in FIGS. 5 and 6, the cylindrical tubular body 15 to which the release agent S is applied is a green tire. The tubular body 15 is horizontally held by a holder 16 with the opening being opened vertically. The release agent S is applied to the inner peripheral surface of the cylindrical body 15.

この実施形態は、先の実施形態とは異なり、転写ローラ２がローラ軸方向に複数に分割されて連接する転写ローラ２Ａ、２Ｂ、２Ｃで構成されている。また、この転写ローラ２は、上下方向にも移動可能になっている。供給ローラ８はローラ軸方向に複数に分割されて連接する供給ローラ８Ａ、８Ｂ、８Ｃで構成されている。その他の構成は先の実施形態と同様である。 In this embodiment, unlike the previous embodiment, the transfer roller 2 is composed of transfer rollers 2A, 2B, and 2C that are divided into a plurality of parts in the roller axial direction and are connected to each other. The transfer roller 2 is also movable in the vertical direction. The supply roller 8 is composed of a plurality of supply rollers 8A, 8B, and 8C that are connected in a divided manner in the roller axial direction. Other configurations are the same as those in the previous embodiment.

転写ローラ２（２Ａ、２Ｂ、２Ｃ）の外周面の縦断面形状は、筒状体１５の内周面の縦断面形状に沿う形状になっている。供給ローラ８（８Ａ、８Ｂ、８Ｃ）の外周面の縦断面形状は、転写ローラ２（２Ａ、２Ｂ、２Ｃ）の外周面の縦断面形状に沿う形状になっている。 The vertical cross-sectional shape of the outer peripheral surface of the transfer roller 2 (2A, 2B, 2C) follows the vertical cross-sectional shape of the inner peripheral surface of the tubular body 15. The vertical cross-sectional shape of the outer peripheral surface of the supply roller 8 (8A, 8B, 8C) is a shape along the vertical cross-sectional shape of the outer peripheral surface of the transfer roller 2 (2A, 2B, 2C).

離型剤Ｓを筒状体１５の内周面に塗布する方法は、基本的に先の実施形態と同様であり、異なる内容を以下に説明する。 The method of applying the release agent S to the inner peripheral surface of the tubular body 15 is basically the same as that of the previous embodiment, and the different contents will be described below.

待機位置ＷＰでは、転写ローラ２Ａと供給ローラ８Ａ、転写ローラ２Ｂと供給ローラ８Ｂ、転写ローラ２Ｃと供給ローラ８Ｃ、のそれぞれを互いの外周面を当接させて互いに自転させる。これにより、それぞれの供給ローラ８Ａ、８Ｂ、８Ｃの外周面から転写ローラ２Ａ、２Ｂ、２Ｃの外周面に離型剤Ｓを供給する。 At the standby position WP, the transfer roller 2A and the supply roller 8A, the transfer roller 2B and the supply roller 8B, and the transfer roller 2C and the supply roller 8C are rotated by bringing their outer peripheral surfaces into contact with each other. As a result, the release agent S is supplied from the outer peripheral surfaces of the supply rollers 8A, 8B, 8C to the outer peripheral surfaces of the transfer rollers 2A, 2B, 2C.

転写ローラ２Ａ、２Ｂ、２Ｃのそれぞれのスポンジ状部材３に所定量の離型剤Ｓが保持された後は、図６に例示するように、転写ローラ２を水平方向および上下方向に移動させて、静止している筒状体１５の内部の塗布位置ＰＰに移動させる。次いで、転写ローラ２の外周面を、静止している筒状体１５の内周面に接触させた状態にして、転写ローラ２を筒状体１５を中心にして公転させつつ自転させることにより、離型剤Ｓを筒状体１５の内周面に塗布する。 After the predetermined amount of the release agent S is held on each of the sponge-like members 3 of the transfer rollers 2A, 2B, 2C, the transfer roller 2 is moved in the horizontal direction and the vertical direction as illustrated in FIG. , To the coating position PP inside the stationary cylindrical body 15. Then, the outer peripheral surface of the transfer roller 2 is brought into contact with the inner peripheral surface of the stationary cylindrical body 15, and the transfer roller 2 revolves around the cylindrical body 15 while revolving. The release agent S is applied to the inner peripheral surface of the cylindrical body 15.

筒状体１５の内周面が単純な円筒内周面であれば、転写ローラ２および供給ローラ８の断面形状を先の実施形態と同じ形状にする。 If the inner peripheral surface of the tubular body 15 is a simple cylindrical inner peripheral surface, the cross-sectional shapes of the transfer roller 2 and the supply roller 8 are the same as those in the previous embodiment.

１ 塗布装置
２、２Ａ、２Ｂ、２Ｃ 転写ローラ
３ スポンジ状部材
４ 中心軸
５ 公転軸
６ 駆動モータ
７ 移動機構
８、８Ａ、８Ｂ、８Ｃ 供給ローラ
９ スポンジ状部材
１０ 中心軸
１１ 駆動モータ
１２ 供給部
１２ａ タンク
１２ｂ ポンプ
１２ｃ 配管
１２ｄ 受け部
１３ 維持機構
１４ フレーム
１５ 筒状体
１６ 保持具
Ｓ 離型剤 1 coating device 2, 2A, 2B, 2C transfer roller 3 sponge-like member 4 center shaft 5 revolution shaft 6 drive motor 7 moving mechanism 8, 8A, 8B, 8C supply roller 9 sponge-like member 10 center shaft 11 drive motor 12 supply unit 12a Tank 12b Pump 12c Pipe 12d Receiving part 13 Maintaining mechanism 14 Frame 15 Cylindrical body 16 Holding tool S Release agent

Claims (5)

塗布位置と待機位置との間を移動する転写ローラと、前記待機位置に配置されている供給ローラと、この供給ローラに離型剤を供給する供給部とを備えて、
前記待機位置では前記供給ローラと前記転写ローラとが外周面どうしを当接させて互いに自転することにより、前記供給ローラの外周面から前記転写ローラの外周面に前記離型剤が供給され、前記塗布位置では前記転写ローラの外周面を、静止している筒状体の外周面または内周面に接触させた状態で、前記転写ローラを前記筒状体を中心にして公転させつつ自転させることにより、前記離型剤が前記筒状体の表面に塗布される構成にしたことを特徴とする離型剤の塗布装置。 A transfer roller that moves between a coating position and a standby position; a supply roller disposed at the standby position; and a supply unit that supplies a release agent to the supply roller,
At the standby position, the supply roller and the transfer roller rotate with each other by bringing their outer peripheral surfaces into contact with each other so that the release agent is supplied from the outer peripheral surface of the supply roller to the outer peripheral surface of the transfer roller. At the coating position, the transfer roller is allowed to rotate while revolving around the cylindrical body while the outer peripheral surface of the transfer roller is in contact with the outer peripheral surface or the inner peripheral surface of the stationary cylindrical body. The release agent applying device is characterized in that the release agent is applied to the surface of the cylindrical body. 前記転写ローラと前記供給ローラとが外周面どうしを当接させている時は、前記転写ローラおよび前記供給ローラが常に自転する構成にした請求項１に記載の離型剤の塗布装置。 The mold release agent coating device according to claim 1, wherein the transfer roller and the supply roller are configured to always rotate when the transfer roller and the supply roller are in contact with each other at their outer peripheral surfaces. 前記転写ローラの幅が、前記筒状体の前記離型剤を塗布する範囲の幅寸法以上に設定されている請求項１または２に記載の離型剤の塗布装置。 The mold release agent application device according to claim 1 or 2, wherein a width of the transfer roller is set to be equal to or greater than a width dimension of a range in which the mold release agent of the tubular body is applied. 前記供給ローラの外周面に保持される前記離型剤の量を一定範囲に維持する維持機構を有する請求項１〜３のいずれかに記載の離型剤の塗布装置。 The mold release agent application device according to claim 1, further comprising a maintenance mechanism that maintains the amount of the mold release agent held on the outer peripheral surface of the supply roller within a certain range. 待機位置で、離型剤が供給された供給ローラと転写ローラとを外周面どうしを当接させて互いに自転させることにより、前記供給ローラの外周面から前記転写ローラの外周面に前記離型剤を供給し、次いで、前記転写ローラを塗布位置に移動させて前記転写ローラの外周面を、静止している筒状体の外周面または内周面に接触させた状態にして、この状態で、前記転写ローラを前記筒状体を中心にして公転させつつ自転させることにより、前記離型剤を前記筒状体の表面に塗布することを特徴とする離型剤の塗布方法。 At the standby position, the supply roller and the transfer roller, to which the release agent is supplied, are rotated by bringing their outer peripheral surfaces into contact with each other so that the release agent is transferred from the outer peripheral surface of the supply roller to the outer peripheral surface of the transfer roller. Then, the transfer roller is moved to the coating position to bring the outer peripheral surface of the transfer roller into contact with the outer peripheral surface or the inner peripheral surface of the stationary cylindrical body, and in this state, A method of applying a release agent, characterized in that the transfer agent is applied to the surface of the tubular body by causing the transfer roller to rotate while revolving around the tubular body.
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