JP2005288941A - Tire molding method - Google Patents

Tire molding method Download PDF

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JP2005288941A
JP2005288941A JP2004109179A JP2004109179A JP2005288941A JP 2005288941 A JP2005288941 A JP 2005288941A JP 2004109179 A JP2004109179 A JP 2004109179A JP 2004109179 A JP2004109179 A JP 2004109179A JP 2005288941 A JP2005288941 A JP 2005288941A
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sheet
drum
wound around
molding
length
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JP4512981B2 (en
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Kenji Nakamura
研二 中村
Akihisa Hasegawa
陽久 長谷川
Yuichi Noda
雄一 野田
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Yokohama Rubber Co Ltd
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Yokohama Rubber Co Ltd
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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)
    • B29D30/08—Building tyres
    • B29D30/20—Building tyres by the flat-tyre method, i.e. building on cylindrical drums
    • B29D30/24—Drums
    • B29D2030/241—Auxiliary drums used for temporary storage of the layers before application to the building drums
    • 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)
    • B29D30/38—Textile inserts, e.g. cord or canvas layers, for tyres; Treatment of inserts prior to building the tyre
    • B29D30/44—Stretching or treating the layers before application on the drum
    • B29D2030/4437—Adjusting the dimensions of the layers

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  • Tyre Moulding (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire molding method capable of always properly setting the splice quantity of the sheetlike member wound around a molding drum. <P>SOLUTION: The thickness of the sheetlike member 1 wound around the molding drum 20 is measured and the proper length of the sheetlike member 1 next wound around the molding drum 20 is calculated on the basis of the measured thickness of the sheetlike member 1, the outer diameter of the molding drum 20 and a predetermined splice quantity to control the interval between the molding drum 20 and a transfer drum 21 so as to become the calculated proper length. By this constitution, the sheetlike member 1 next wound around the molding drum 20 can be wound so that the splice quantity always becomes proper and the correction caused by splice abnormality or the occurrence of a bad product can be certainly prevented. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、例えば乗用車用のラジアルタイヤとして用いられる空気入りタイヤの製造において、インナーライナやカーカス部材等のシート状部材を成形ドラムに巻き付けて未加硫タイヤの一部を成形するタイヤ成形方法に関するものである。   The present invention relates to a tire forming method for forming a part of an unvulcanized tire by winding a sheet-like member such as an inner liner or a carcass member around a forming drum in the manufacture of a pneumatic tire used as a radial tire for a passenger car, for example. Is.

一般に、この種の空気入りタイヤの製造においては、インナーライナやカーカス部材等のシート状部材を成形ドラムに巻き付け、未加硫タイヤの一部を成形する工程がある。この場合、シート状部材をコンベアによって搬送するとともに、コンベア上で所定長さに切断し、コンベアから成形ドラムに巻き付ける方法が知られている（例えば、特許文献１参照。）。また、他の成形方法としては、予め所定長さに切断されたシート状部材をコンベアから転写ドラムに巻き付けるとともに、転写ドラムに巻き付けられたシート状部材を転写ドラムから成形ドラムに巻き付ける方法が知られている（例えば、特許文献２参照。）。   In general, in manufacturing this type of pneumatic tire, there is a step of winding a sheet-like member such as an inner liner or a carcass member around a forming drum to form a part of an unvulcanized tire. In this case, there is known a method in which a sheet-like member is conveyed by a conveyor, cut into a predetermined length on the conveyor, and wound around a forming drum from the conveyor (for example, see Patent Document 1). As another forming method, there is known a method in which a sheet-like member cut in advance to a predetermined length is wound around a transfer drum from a conveyor, and a sheet-like member wound around the transfer drum is wound around the transfer drum from the transfer drum. (For example, refer to Patent Document 2).

ところで、前記成形工程においては、複数のシート状部材が順次成形ドラムに巻き付けられるが、シート状部材が巻き付けられる径は、先に巻き付けられているシート状部材の厚さ分だけ大きくなるため、全て等しい長さのシート状部材を巻き付けると、外側に巻き付けられたシート状部材のスプライス量が内側に巻き付けられたシート状部材のスプライス量よりも短くなり、適正なスプライス量を確保することができない。そこで、例えば特許文献１に記載されたものでは、成形ドラムに巻き付けられたシート状部材の長さとスプライス量に基づいて、コンベアと成形ドラムとの速度比を制御することにより、次に巻き付けるシート状部材のスプライス量が適正になるように調整している。
特開平６−１５７４８号公報 特開２００２−１０３４７４号公報 By the way, in the forming step, a plurality of sheet-like members are sequentially wound around the forming drum, but the diameter around which the sheet-like member is wound increases by the thickness of the sheet-like member that has been wound earlier, When the sheet-like member having the same length is wound, the splice amount of the sheet-like member wound on the outer side becomes shorter than the splice amount of the sheet-like member wound on the inner side, and an appropriate splice amount cannot be ensured. Thus, for example, in the one described in Patent Document 1, the sheet shape to be wound next is controlled by controlling the speed ratio between the conveyor and the forming drum based on the length of the sheet-like member wound around the forming drum and the splice amount. The splice amount of the member is adjusted to be appropriate.
JP-A-6-15748 JP 2002-103474 A

しかしながら、シート状部材が巻き付けられる径は、先に巻き付けられているシート状部材の実際の厚さと成形ドラムの外径によって決まるため、成形ドラムに巻き付けられたシート状部材の長さやスプライス量を測定するのみでは、次に巻き付けるシート状部材のスプライス量を常に適正にすることができず、スプライス異常による修正や不良品の発生を確実に防止することができないという問題点があった。   However, since the diameter around which the sheet-like member is wound is determined by the actual thickness of the sheet-like member wound earlier and the outer diameter of the forming drum, the length and splice amount of the sheet-like member wound around the forming drum are measured. However, there is a problem that the amount of splice of the sheet-like member to be wound next cannot always be made appropriate, and correction due to splice abnormality or generation of defective products cannot be surely prevented.

本発明は前記問題点に鑑みてなされたものであり、その目的とするところは、成形ドラムに巻き付けられるシート状部材のスプライス量を常に適正にすることのできるタイヤ成形方法を提供することにある。   The present invention has been made in view of the above problems, and an object of the present invention is to provide a tire molding method capable of always making the splice amount of a sheet-like member wound around a molding drum appropriate. .

本発明は前記目的を達成するために、ゴム材料からなるシート状部材を所定長さに切断して成形ドラムに巻き付けることにより、複数のシート状部材を順次成形ドラムに巻き付けて未加硫タイヤの一部を成形するタイヤ成形方法において、前記成形ドラムに巻き付けられたシート状部材の厚さを測定するとともに、測定したシート状部材の厚さ、成形ドラムの外径及び所定のスプライス量に基づいて次に成形ドラムに巻き付けるシート状部材の長さを算出し、算出した長さになるように次のシート状部材を切断するようにしている。   In order to achieve the above object, the present invention cuts a sheet-like member made of a rubber material into a predetermined length and wraps it around a molding drum, thereby winding a plurality of sheet-like members around the molding drum in order. In the tire molding method for molding a part, the thickness of the sheet-like member wound around the molding drum is measured, and based on the measured thickness of the sheet-like member, the outer diameter of the molding drum, and a predetermined splice amount Next, the length of the sheet-like member wound around the forming drum is calculated, and the next sheet-like member is cut so as to have the calculated length.

これにより、次に成形ドラムに巻き付けるシート状部材が、成形ドラムに巻き付けられたシート状部材の厚さ、成形ドラムの外径及び所定のスプライス量に基づいて算出される長さに切断されることから、シート状部材が常に適正なスプライス量になるように巻き付けられる。   As a result, the sheet-like member to be wound next around the forming drum is cut to a length calculated based on the thickness of the sheet-like member wound around the forming drum, the outer diameter of the forming drum, and a predetermined amount of splice. Therefore, the sheet-like member is wound so as to always have an appropriate splice amount.

また、本発明は、ゴム材料からなる所定長さのシート状部材を転写ドラムに巻き付けるとともに、転写ドラムを成形ドラム側に移動し、転写ドラムに巻き付けられたシート状部材を転写ドラムによって成形ドラムに圧接させながら成形ドラムに巻き付けることにより、複数のシート状部材を順次成形ドラムに巻き付けて未加硫タイヤの一部を成形するタイヤ成形方法において、前記成形ドラムに巻き付けられたシート状部材の厚さを測定するとともに、測定したシート状部材の厚さ、成形ドラムの外径及び所定のスプライス量に基づいて次に成形ドラムに巻き付けるシート状部材の長さを算出し、転写ドラムから成形ドラムに巻き付けられるシート状部材の長さが算出した長さになるように転写ドラムと成形ドラムとの間隔を制御するようにしている。   In addition, the present invention wraps a sheet-like member of a predetermined length made of a rubber material around a transfer drum, moves the transfer drum to the forming drum side, and uses the transfer drum to turn the sheet-like member wound around the transfer drum onto the forming drum. In a tire molding method for forming a part of an unvulcanized tire by sequentially winding a plurality of sheet-like members around a forming drum by being wound around a forming drum while being pressed, the thickness of the sheet-like member wound around the forming drum Is calculated, and the length of the sheet-like member to be wound next around the forming drum is calculated based on the measured thickness of the sheet-like member, the outer diameter of the forming drum, and a predetermined amount of splice, and is wound around the forming drum from the transfer drum. The distance between the transfer drum and the forming drum is controlled so that the length of the sheet-like member to be obtained becomes the calculated length. To have.

これにより、次に成形ドラムに巻き付けるシート状部材が、成形ドラムに巻き付けられたシート状部材の厚さ、成形ドラムの外径及び所定のスプライス量に基づいて算出される長さになるように転写ドラムと成形ドラムとの間隔が制御されることから、シート状部材が常に適正なスプライス量になるように巻き付けられる。   As a result, the sheet-like member to be wound next around the forming drum is transferred so as to have a length calculated based on the thickness of the sheet-like member wound around the forming drum, the outer diameter of the forming drum, and a predetermined splice amount. Since the distance between the drum and the forming drum is controlled, the sheet-like member is always wound so as to have an appropriate splice amount.

また、本発明は、ゴム材料からなる所定長さのシート状部材を転写ドラムに巻き付けるとともに、転写ドラムを成形ドラム側に移動し、転写ドラムに巻き付けられたシート状部材を各ドラムを回転させながら成形ドラムに巻き付けることにより、複数のシート状部材を順次成形ドラムに巻き付けて未加硫タイヤの一部を成形するタイヤ成形方法において、前記成形ドラムに巻き付けられたシート状部材の厚さを測定するとともに、測定したシート状部材の厚さ、成形ドラムの外径及び所定のスプライス量に基づいて次に成形ドラムに巻き付けるシート状部材の長さを算出し、転写ドラムから成形ドラムに巻き付けられるシート状部材の長さが算出した長さになるように成形ドラムと転写ドラムの回転速度比を制御するようにしている。   In addition, the present invention wraps a sheet-like member of a predetermined length made of a rubber material around a transfer drum, moves the transfer drum to the forming drum side, and rotates the drum-like member wound around the transfer drum. In a tire molding method for forming a part of an unvulcanized tire by winding a plurality of sheet-like members sequentially around the molding drum by winding the molding drum, the thickness of the sheet-like member wound around the molding drum is measured. In addition, based on the measured thickness of the sheet-like member, the outer diameter of the forming drum, and a predetermined amount of splice, the length of the sheet-like member to be wound next around the forming drum is calculated, and the sheet shape wound around the forming drum from the transfer drum The rotation speed ratio between the forming drum and the transfer drum is controlled so that the length of the member becomes the calculated length.

これにより、次に成形ドラムに巻き付けるシート状部材が、成形ドラムに巻き付けられたシート状部材の厚さ、成形ドラムの外径及び所定のスプライス量に基づいて算出される長さになるように転写ドラムと成形ドラムの回転速度比が制御されることから、シート状部材が常に適正なスプライス量になるように巻き付けられる。   As a result, the sheet-like member to be wound next around the forming drum is transferred so as to have a length calculated based on the thickness of the sheet-like member wound around the forming drum, the outer diameter of the forming drum, and a predetermined splice amount. Since the rotation speed ratio between the drum and the forming drum is controlled, the sheet-like member is wound so as to always have an appropriate splice amount.

また、本発明は、ゴム材料からなる所定長さのシート状部材を転写ドラムに巻き付けるとともに、転写ドラムに巻き付けられたシート状部材を外径が拡大及び縮小可能な成形ドラムに巻き付けることにより、複数のシート状部材を順次成形ドラムに巻き付けて未加硫タイヤの一部を成形するタイヤ成形方法において、前記成形ドラムに巻き付けられたシート状部材の厚さを測定するとともに、シート状部材の長さ、測定したシート状部材の厚さ及び所定のスプライス量に基づいて次に成形ドラムに巻き付けられるシート状部材のスプライス量が所定量となる成形ドラムの外径を算出し、算出した外径になるように成形ドラムの外径を拡大または縮小するようにしている。   In addition, the present invention wraps a sheet-like member having a predetermined length made of a rubber material around a transfer drum, and winds the sheet-like member wound around the transfer drum around a molding drum whose outer diameter can be enlarged and reduced. In the tire molding method in which the sheet-shaped members are sequentially wound around a molding drum to form a part of an unvulcanized tire, the thickness of the sheet-shaped member wound around the molding drum is measured, and the length of the sheet-shaped member Based on the measured thickness of the sheet-like member and a predetermined amount of splice, the outer diameter of the forming drum is calculated so that the splice amount of the sheet-like member to be wound around the forming drum next becomes the predetermined amount, and the calculated outer diameter is obtained. Thus, the outer diameter of the forming drum is enlarged or reduced.

これにより、成形ドラムが、シート状部材の長さ、成形ドラムに巻き付けられたシート状部材の厚さ及び所定のスプライス量に基づいて算出される外径になるように外径を拡大または縮小されることから、シート状部材が常に適正なスプライス量になるように巻き付けられる。   As a result, the outer diameter of the forming drum is enlarged or reduced so that the outer diameter is calculated based on the length of the sheet-like member, the thickness of the sheet-like member wound around the forming drum, and a predetermined amount of splice. Therefore, the sheet-like member is always wound so as to have an appropriate splice amount.

本発明によれば、シート状部材を常に適正なスプライス量になるように成形ドラムに巻き付けることができるので、スプライス異常による修正や不良品の発生を確実に防止することができる。   According to the present invention, since the sheet-like member can be wound around the forming drum so as to always have an appropriate splice amount, correction due to splice abnormality and generation of defective products can be surely prevented.

図１乃至図４は本発明の一実施形態を示すもので、図１はタイヤ成形装置の概略側面図、図２は制御系を示すブロック図、図３は制御部の動作を示すフローチャート、図４はシート状部材の巻き付け動作を示す要部側面図である。   1 to 4 show an embodiment of the present invention. FIG. 1 is a schematic side view of a tire forming apparatus, FIG. 2 is a block diagram showing a control system, and FIG. 3 is a flowchart showing the operation of a control unit. 4 is a side view of the main part showing the winding operation of the sheet-like member.

本実施形態のタイヤ成形装置は、インナーライナやカーカス部材等のシート状部材１が巻き付けられる成形ドラム１０と、シート状部材１を搬送する搬送手段としての第１及び第２のコンベア１１，１２と、成形ドラム１０に巻き付けられたシート状部材１の厚さを検出する厚さセンサ１３と、成形ドラム１０に巻き付けられたシート状部材１のスプライス量を検出するスプライスセンサ１４と、シート状部材１を幅方向に切断する切断装置１５と、シート状部材１の切断長さを制御する制御部１６とから構成されている。   The tire molding apparatus of the present embodiment includes a molding drum 10 around which a sheet-like member 1 such as an inner liner or a carcass member is wound, and first and second conveyors 11 and 12 as conveying means for conveying the sheet-like member 1. The thickness sensor 13 for detecting the thickness of the sheet-like member 1 wound around the forming drum 10, the splice sensor 14 for detecting the splice amount of the sheet-like member 1 wound around the forming drum 10, and the sheet-like member 1 Is configured by a cutting device 15 for cutting the sheet-like member in the width direction and a control unit 16 for controlling the cutting length of the sheet-like member 1.

成形ドラム１０は、図示しない駆動手段によって回転することにより、コンベア１１，１２側から供給されるシート状部材１を巻き付ける周知の構成からなり、例えば周方向に分割された複数の部材を径方向に移動させることにより、外径を縮小及び拡大可能に構成されたものが用いられる。   The forming drum 10 has a known configuration in which the sheet-like member 1 supplied from the conveyors 11 and 12 side is wound by being rotated by a driving means (not shown). For example, a plurality of members divided in the circumferential direction are radially arranged. What was comprised so that an outer diameter can be reduced and expanded by moving is used.

第１及び第２のコンベア１１，１２はそれぞれシート状部材１の搬送方向上流側及び下流側に配置され、第２のコンベア１２の下流側には成形ドラム１０が配置されている。また、第２のコンベア１２は、例えば油圧シリンダからなる上下動機構１２ａによって一端側を上下動可能に構成されている。   The first and second conveyors 11 and 12 are disposed on the upstream side and the downstream side, respectively, in the conveying direction of the sheet-like member 1, and the forming drum 10 is disposed on the downstream side of the second conveyor 12. Moreover, the 2nd conveyor 12 is comprised so that an end side can be moved up and down by the up-and-down moving mechanism 12a which consists of a hydraulic cylinder, for example.

厚さセンサ１３は、成形ドラム１０の周面所定位置に対向するように配置された周知の渦電流センサからなり、成形ドラム１０に巻き付けられたシート状部材１の表面にローラを介して接触し、成形ドラム１０との距離をシート状部材１の厚さとして検出するようになっている。   The thickness sensor 13 is a well-known eddy current sensor arranged to face a predetermined position on the peripheral surface of the forming drum 10, and contacts the surface of the sheet-like member 1 wound around the forming drum 10 via a roller. The distance from the forming drum 10 is detected as the thickness of the sheet-like member 1.

スプライスセンサ１４は、成形ドラム１０の周面所定位置に対向するように配置された周知のレーザー変位計からなり、スプライス部分の段差を検知することにより、その周方向の長さをスプライス量として検出するようになっている。   The splice sensor 14 is a known laser displacement meter arranged so as to face a predetermined position on the peripheral surface of the molding drum 10, and detects the circumferential length as a splice amount by detecting a step in the splice portion. It is supposed to be.

切断装置１５は第１及び第２のコンベア１１，１２間に設けられ、例えば図示しない回転刃をシート状部材１に押し当てながらシート状部材１の幅方向に移動させることによりシート状部材１を切断するようになっている。この場合、各コンベア１１，１２によってシート状部材１を所定長さ分だけ搬送して切断することにより、シート状部材１を所定長さに切断するようになっている。   The cutting device 15 is provided between the first and second conveyors 11, 12. For example, the sheet-like member 1 is moved by moving the sheet-like member 1 in the width direction while pressing a rotary blade (not shown) against the sheet-like member 1. It is designed to cut. In this case, the sheet-like member 1 is cut into a predetermined length by conveying and cutting the sheet-like member 1 by a predetermined length by the conveyors 11 and 12.

制御部１６はマイクロコンピュータによって構成され、成形ドラム１０、第１及び第２のコンベア１１，１２、厚さセンサ１３、スプライスセンサ１４及び切断装置１５に接続されている。また、制御部１６には、警報ランプや警報ブザー等からなる警報装置１７が接続されている。更に、制御部１６には、タイヤの設計仕様等、成形ドラム１０に巻き付けるシート状部材１の長さ及びスプライス量に関するデータが中央処理部２から入力されるようになっている。   The control unit 16 is configured by a microcomputer and is connected to the forming drum 10, the first and second conveyors 11 and 12, the thickness sensor 13, the splice sensor 14, and the cutting device 15. The control unit 16 is connected to an alarm device 17 including an alarm lamp and an alarm buzzer. Furthermore, data related to the length of the sheet-like member 1 wound around the forming drum 10 and the amount of splice, such as tire design specifications, is input to the control unit 16 from the central processing unit 2.

ここで、前記制御部１６の動作について、図３のフローチャートを参照して説明する。まず、シート状部材１の切断長さＬを所定の基準値Ｌ1 （設計仕様のデータ）に設定し（Ｓ１）、切断装置１５によってシート状部材１を長さＬ1 に切断する（Ｓ２）。次に、シート状部材１を搬送する第２のコンベア１２を上下動機構１２ａによって上昇させることにより、シート状部材１の先端側を成形ドラム１０の外周面に接触させ、図４(a) に示すようにシート状部材１を成形ドラム１０に巻き付ける（Ｓ３）。ここで、図４(b) に示すようにシート状部材１が成形ドラム１０に完全に巻き付けられたならば、厚さセンサ１３によってシート状部材１の厚さＴを検出するとともに（Ｓ４）、スプライスセンサ１４によってスプライス量Ｓを検出し（Ｓ５）、スプライスセンサ１４によって検出されたスプライス量Ｓが適正か否かを判定する（Ｓ６）。この場合、スプライス量の検出値Ｓが所定の基準値Ｓ1 （設計仕様のデータ）に所定の許容値αを加減した範囲内、即ちＳ1 ±αの範囲内であれば適正と判定する。ここで、スプライス量Ｓが適正であると判定されたならば、次に成形ドラム１０に巻き付けるシート状部材１がある場合は（Ｓ７）、次に巻き付けるシート状部材１の長さＬ2 を算出する（Ｓ８）。即ち、成形ドラム１０の外径をＤとすると、厚さセンサ１３によって検出したシート状部材１の厚さＴとスプライス量の基準値Ｓ1 とから、次式(1) によってシート状部材１の長さＬ2 が算出されるので、
Ｌ2 ＝（２Ｔ＋Ｄ）×π＋Ｓ1 …(1)
算出した長さＬ2 をシート状部材１の切断長さＬに設定し（Ｓ９）、前記ステップＳ２〜Ｓ９の動作を繰り返すことにより、次のシート状部材１の切断及び巻き付け、スプライス量の判定を行う。ここで、前記ステップＳ６においてスプライス量Ｓが適正でないと判定された場合には、警報装置を作動し（Ｓ１０）、プログラムを終了する。また、全てのシート状部材１の巻き付けが完了し、前記ステップＳ７において次に成形ドラム１０に巻き付けるシート状部材１がないと判定された場合にはプログラムを終了する。 Here, the operation of the control unit 16 will be described with reference to the flowchart of FIG. First, the cutting length L of the sheet-like member 1 is set to a predetermined reference value L1 (design specification data) (S1), and the cutting device 15 cuts the sheet-like member 1 into the length L1 (S2). Next, the second conveyor 12 that conveys the sheet-like member 1 is raised by the vertical movement mechanism 12a, so that the front end side of the sheet-like member 1 is brought into contact with the outer peripheral surface of the forming drum 10, and FIG. As shown, the sheet-like member 1 is wound around the forming drum 10 (S3). Here, if the sheet-like member 1 is completely wound around the forming drum 10 as shown in FIG. 4B, the thickness sensor 13 detects the thickness T of the sheet-like member 1 (S4), The splice amount S is detected by the splice sensor 14 (S5), and it is determined whether or not the splice amount S detected by the splice sensor 14 is appropriate (S6). In this case, if the detected value S of the splice amount is within the range obtained by adding or subtracting the predetermined allowable value α to the predetermined reference value S1 (design specification data), that is, within the range of S1 ± α, it is determined to be appropriate. Here, if it is determined that the splice amount S is appropriate, if there is a sheet-like member 1 to be wound next around the forming drum 10 (S7), the length L2 of the sheet-like member 1 to be wound next is calculated. (S8). That is, when the outer diameter of the forming drum 10 is D, the length of the sheet-like member 1 is calculated by the following equation (1) from the thickness T of the sheet-like member 1 detected by the thickness sensor 13 and the reference value S1 of the splice amount. Since L2 is calculated,
L2 = (2T + D) × π + S1 (1)
The calculated length L2 is set to the cutting length L of the sheet-like member 1 (S9), and the operations of the steps S2 to S9 are repeated, whereby the next sheet-like member 1 is cut and wound, and the splice amount is determined. Do. If it is determined in step S6 that the splice amount S is not appropriate, the alarm device is activated (S10) and the program is terminated. If the winding of all the sheet-like members 1 is completed and it is determined in step S7 that there is no sheet-like member 1 to be wound around the forming drum 10 next, the program is terminated.

このように、本実施形態によれば、成形ドラム１０に巻き付けられたシート状部材１の厚さを測定するとともに、測定したシート状部材１の厚さ、成形ドラム１０の外径及び所定のスプライス量に基づいて次に成形ドラム１０に巻き付けるシート状部材１の長さを算出し、算出した長さになるように次のシート状部材１を切断するようにしたので、次に成形ドラム１０に巻き付けるシート状部材１を常にスプライス量が適正になるように巻き付けることができ、スプライス異常による修正や不良品の発生を確実に防止することができる。   Thus, according to the present embodiment, the thickness of the sheet-like member 1 wound around the forming drum 10 is measured, and the measured thickness of the sheet-like member 1, the outer diameter of the forming drum 10, and a predetermined splice. Since the length of the sheet-like member 1 to be wound next around the forming drum 10 is calculated based on the amount, and the next sheet-like member 1 is cut so as to have the calculated length, The sheet-like member 1 to be wound can always be wound so that the amount of splice becomes appropriate, and correction due to splice abnormality and generation of defective products can be surely prevented.

図５乃至図９は本発明の他の実施形態を示すもので、図５はタイヤ成形装置の概略側面図、図６は制御系を示すブロック図、図７は制御部の動作を示すフローチャート、図８は転写ドラムへのシート状部材の巻き付け動作を示す要部側面図、図９は成形ドラムへのシート状部材の巻き付け動作を示す要部側面図である。   FIGS. 5 to 9 show another embodiment of the present invention, FIG. 5 is a schematic side view of a tire forming apparatus, FIG. 6 is a block diagram showing a control system, and FIG. 7 is a flowchart showing the operation of a control unit, FIG. 8 is a main part side view showing the winding operation of the sheet-like member around the transfer drum, and FIG. 9 is a main part side view showing the winding operation of the sheet-like member around the forming drum.

本実施形態のタイヤ成形装置は、インナーライナやカーカス部材等のシート状部材１が巻き付けられる成形ドラム２０と、成形ドラム２０にシート状部材１を巻き付ける転写ドラム２１と、転写ドラム２１に巻き付けられるシート状部材１を搬送する搬送手段としてのコンベア２２と、成形ドラム２０に巻き付けられたシート状部材１の厚さを検出する厚さセンサ２３と、成形ドラム２０に巻き付けられたシート状部材１のスプライス量を検出するスプライスセンサ２４と、シート状部材１の巻き付け長さを制御する制御部２５とから構成されている。   The tire molding apparatus of this embodiment includes a molding drum 20 around which a sheet-like member 1 such as an inner liner or a carcass member is wound, a transfer drum 21 around which the sheet-like member 1 is wound around the molding drum 20, and a sheet wound around the transfer drum 21. A conveyor 22 as a conveying means for conveying the sheet-like member 1, a thickness sensor 23 for detecting the thickness of the sheet-like member 1 wound around the forming drum 20, and a splice of the sheet-like member 1 wound around the forming drum 20. A splice sensor 24 for detecting the amount and a control unit 25 for controlling the winding length of the sheet-like member 1 are configured.

成形ドラム２０は、図示しない駆動手段によって回転することにより、転写ドラム２１のシート状部材１を巻き付ける周知の構成からなり、例えば周方向に分割された複数の部材を径方向に移動させることにより、外径を縮小及び拡大可能に構成されたものが用いられる。   The forming drum 20 has a known configuration in which the sheet-like member 1 of the transfer drum 21 is wound by being rotated by a driving unit (not shown). For example, by moving a plurality of members divided in the circumferential direction in the radial direction, What is comprised so that an outer diameter can be reduced and expanded is used.

転写ドラム２１は、図示しない駆動手段によって回転しながらコンベア２２の搬送方向に移動することにより、コンベア２２上のシート状部材１を巻き付ける周知の構成からなり、その外径は成形ドラム２０の外径よりも大きく形成されている。   The transfer drum 21 has a known configuration in which the sheet-like member 1 on the conveyor 22 is wound by moving in the conveying direction of the conveyor 22 while being rotated by a driving unit (not shown). It is formed larger than.

コンベア２２は、予め所定長さＬ1 に切断されたシート状部材１を長さ方向に搬出するようになっており、例えば油圧シリンダからなる上下動機構２２ａによって一端側を上下動可能に構成されている。   The conveyor 22 is configured to carry out the sheet-like member 1 cut in advance to a predetermined length L1 in the length direction, and is configured such that one end side thereof can be moved up and down by a vertical movement mechanism 22a made of, for example, a hydraulic cylinder. Yes.

厚さセンサ２３は、成形ドラム２０の周面所定位置に対向するように配置された周知の渦電流センサからなり、成形ドラム２０に巻き付けられたシート状部材１の表面にローラを介して接触し、成形ドラム２０との距離をシート状部材１の厚さとして検出するようになっている。   The thickness sensor 23 is a well-known eddy current sensor arranged to face a predetermined position on the peripheral surface of the forming drum 20, and contacts the surface of the sheet-like member 1 wound around the forming drum 20 via a roller. The distance from the forming drum 20 is detected as the thickness of the sheet-like member 1.

スプライスセンサ２４は、成形ドラム２０の周面所定位置に対向するように配置された周知のレーザー変位計からなり、スプライス部分の段差を検知することにより、その周方向の長さをスプライス量として検出するようになっている。   The splice sensor 24 is a known laser displacement meter arranged so as to face a predetermined position on the circumferential surface of the molding drum 20, and detects the circumferential length as a splice amount by detecting the level difference of the splice portion. It is supposed to be.

制御部２５はマイクロコンピュータによって構成され、成形ドラム２０、転写ドラム２１、コンベア２２、厚さセンサ２３及びスプライスセンサ２４に接続されている。また、制御部２５には、警報ランプや警報ブザー等からなる警報装置２６と、厚さセンサ２３及びスプライスセンサ２４の測定結果を記憶する記憶部２７が接続されている。更に、制御部２５には、タイヤの設計仕様等、成形ドラム２０に巻き付けるシート状部材１の長さ及びスプライス量に関するデータが中央処理部２から入力されるようになっている。   The control unit 25 includes a microcomputer and is connected to the forming drum 20, the transfer drum 21, the conveyor 22, the thickness sensor 23, and the splice sensor 24. The control unit 25 is connected to an alarm device 26 including an alarm lamp, an alarm buzzer, and the like, and a storage unit 27 that stores measurement results of the thickness sensor 23 and the splice sensor 24. Further, the control unit 25 is inputted with data related to the length and splice amount of the sheet-like member 1 wound around the forming drum 20 such as the design specifications of the tire from the central processing unit 2.

ここで、前記制御部２５の動作について、図７のフローチャートを参照して説明する。まず、コンベア２２を上下動機構２２ａによって上昇させることにより、シート状部材１の一端側を成形ドラム２０の外周面に圧接させ、図８(a) に示すように転写ドラム２１を回転させながらコンベア２２の搬送方向に移動することにより、図８(b) に示すようにコンベア２２上のシート状部材１を転写ドラム２１に巻き付ける（Ｓ１１）。次に、転写ドラム２１を成形ドラム２０まで移動し、転写ドラム２１のシート状部材１を成形ドラム１０の外周面に圧接させることにより、図９(a)(b)に示すように各ドラム２０，２１を回転させながら転写ドラム２１のシート状部材１を成形ドラム２０に巻き付ける（Ｓ１２）。ここで、厚さセンサ２３の測定結果が記憶部２７に記憶されていなければ（Ｓ１３）、厚さセンサ２３によってシート状部材１の厚さＴを測定し（Ｓ１４）、厚さＴの測定結果を記憶部２７に記憶した後（Ｓ１５）、スプライスセンサ１４によってスプライス量Ｓを測定し（Ｓ１６）、スプライスセンサ１４によって測定されたスプライス量Ｓが適正か否かを判定する（Ｓ１７）。この場合、スプライス量の検出値Ｓが所定の基準値Ｓ1 （設計仕様のデータ）に所定の許容値αを加減した範囲内、即ちＳ1 ±αの範囲内であれば適正と判定する。ここで、スプライス量Ｓが適正であると判定され、次に成形ドラム１０に巻き付けるシート状部材１がある場合は（Ｓ１８）、後述する方法により、成形ドラム２０に巻き付けられるシート状部材１のスプライス量を調整する（Ｓ２０）。そして、前記ステップＳ１１〜Ｓ２０の動作を繰り返すことにより、次のシート状部材１の巻き付け、スプライス量の判定及びスプライス量の調整を行う。また、前記ステップＳ１３において記憶部２７に前回の測定データが記憶されている場合には、厚さセンサ２３による測定は行わず、ステップＳ１６に移行する。更に、前記ステップＳ１７においてスプライス量Ｓが適正でないと判定された場合には、警報装置を作動し（Ｓ２１）、プログラムを終了する。また、全てのシート状部材１の巻き付けが完了し、前記ステップＳ１８において次に成形ドラム２０に巻き付けるシート状部材１がないと判定された場合にはプログラムを終了する。   Here, the operation of the control unit 25 will be described with reference to the flowchart of FIG. First, the conveyor 22 is raised by the vertical movement mechanism 22a so that one end of the sheet-like member 1 is brought into pressure contact with the outer peripheral surface of the forming drum 20, and the transfer drum 21 is rotated while rotating the transfer drum 21 as shown in FIG. By moving in the conveying direction 22, the sheet-like member 1 on the conveyor 22 is wound around the transfer drum 21 as shown in FIG. 8B (S 11). Next, the transfer drum 21 is moved to the forming drum 20, and the sheet-like member 1 of the transfer drum 21 is brought into pressure contact with the outer peripheral surface of the forming drum 10, so that each drum 20 is shown in FIGS. 9 (a) and 9 (b). , 21 is rotated and the sheet-like member 1 of the transfer drum 21 is wound around the forming drum 20 (S12). If the measurement result of the thickness sensor 23 is not stored in the storage unit 27 (S13), the thickness T of the sheet-like member 1 is measured by the thickness sensor 23 (S14), and the measurement result of the thickness T is measured. Is stored in the storage unit 27 (S15), the splice amount S is measured by the splice sensor 14 (S16), and it is determined whether or not the splice amount S measured by the splice sensor 14 is appropriate (S17). In this case, if the detected value S of the splice amount is within the range obtained by adding or subtracting the predetermined allowable value α to the predetermined reference value S1 (design specification data), that is, within the range of S1 ± α, it is determined to be appropriate. Here, when it is determined that the splice amount S is appropriate and there is a sheet-like member 1 to be wound around the forming drum 10 next (S18), the splice of the sheet-like member 1 to be wound around the forming drum 20 by the method described later. The amount is adjusted (S20). Then, by repeating the operations of steps S11 to S20, the next sheet-like member 1 is wound, the splice amount is determined, and the splice amount is adjusted. If the previous measurement data is stored in the storage unit 27 in step S13, the measurement by the thickness sensor 23 is not performed and the process proceeds to step S16. Further, when it is determined in step S17 that the splice amount S is not appropriate, the alarm device is activated (S21) and the program is terminated. Further, when the winding of all the sheet-like members 1 is completed and it is determined in step S18 that there is no sheet-like member 1 to be wound next around the forming drum 20, the program ends.

前記ステップＳ１９におけるスプライス量の調整方法としては、例えば成形ドラム２０と転写ドラム２１との間隔を制御することにより、転写ドラム２１から成形ドラム２０に巻き付けられるシート状部材１のスプライス量を調整する。即ち、成形ドラム２０の外径をＤとすると、厚さセンサ１３によって検出したシート状部材１の厚さＴとスプライス量の基準値Ｓ1 とから、次式(2) によって成形ドラム２０に巻き付けるシート状部材１の適正な長さＬ2 を算出する。   As a method for adjusting the splice amount in the step S19, for example, by controlling the distance between the forming drum 20 and the transfer drum 21, the splice amount of the sheet-like member 1 wound around the forming drum 20 from the transfer drum 21 is adjusted. That is, when the outer diameter of the forming drum 20 is D, the sheet wound around the forming drum 20 by the following equation (2) from the thickness T of the sheet-like member 1 detected by the thickness sensor 13 and the reference value S1 of the splice amount. An appropriate length L2 of the shaped member 1 is calculated.

Ｌ2 ＝（２Ｔ＋Ｄ）×π＋Ｓ1 …(2)
ここで、転写ドラム２１から成形ドラム２０に巻き付けられるシート状部材１の長さは、転写ドラム２１と成形ドラム２０との間隔が小さいほど長くなるので、長さＬ1 のシート状部材１が算出した適正長さＬ2 になるように成形ドラム２０に対する転写ドラム２１の位置を制御する。例えば、シート状部材１の長さＬ1 と適正長さＬ2 に対する各ドラム２０の間隔を予めデータテーブルに記憶しておき、シート状部材１の巻き付ける際に算出される適正長さＬ2 に対応するドラム間隔をデータテーブルに基づいて設定する。尚、前回以前の成形時における厚さＴの測定データが記憶部２７に記憶されている場合には、この測定データに基づいてシート状部材１の適正長さＬ2 を算出する。 L2 = (2T + D) × π + S1 (2)
Here, since the length of the sheet-like member 1 wound around the forming drum 20 from the transfer drum 21 becomes longer as the distance between the transfer drum 21 and the forming drum 20 becomes smaller, the sheet-like member 1 having a length L1 is calculated. The position of the transfer drum 21 with respect to the molding drum 20 is controlled so as to be an appropriate length L2. For example, the distance between the drums 20 with respect to the length L1 and the appropriate length L2 of the sheet-like member 1 is stored in advance in a data table, and the drum corresponding to the appropriate length L2 calculated when the sheet-like member 1 is wound. Set the interval based on the data table. If the measurement data of the thickness T at the time of molding before the previous time is stored in the storage unit 27, the appropriate length L2 of the sheet-like member 1 is calculated based on this measurement data.

また、他の方法としては、成形ドラム２０と転写ドラム２１との回転速度比を制御することにより、転写ドラム２１から成形ドラム２０に巻き付けられるシート状部材１のスプライス量を調整する。即ち、転写ドラム２１から成形ドラム２０に巻き付けられるシート状部材１の長さは、転写ドラム２１の外周面に対する成形ドラム２０の外周面の速度が遅いほど長くなるので、長さＬ1 のシート状部材１が適正長さＬ2 になるように成形ドラム２０に対する転写ドラム２１の回転速度を制御する。例えば、シート状部材１の長さＬ1 と適正長さＬ2 に対する各ドラム２０の間隔を予めデータテーブルに記憶しておき、シート状部材１の巻き付ける際に算出される適正長さＬ2 に対応する転写ドラム２１の回転速度をデータテーブルに基づいて設定する。   As another method, the splice amount of the sheet-like member 1 wound around the forming drum 20 from the transfer drum 21 is adjusted by controlling the rotation speed ratio between the forming drum 20 and the transfer drum 21. That is, the length of the sheet-like member 1 wound from the transfer drum 21 to the forming drum 20 becomes longer as the speed of the outer peripheral surface of the forming drum 20 relative to the outer peripheral surface of the transfer drum 21 becomes slower. The rotational speed of the transfer drum 21 with respect to the forming drum 20 is controlled so that 1 becomes an appropriate length L2. For example, the distance between each drum 20 with respect to the length L1 and the appropriate length L2 of the sheet-like member 1 is stored in advance in a data table, and the transfer corresponding to the appropriate length L2 calculated when the sheet-like member 1 is wound. The rotational speed of the drum 21 is set based on the data table.

このように、本実施形態によれば、成形ドラム２０に巻き付けられたシート状部材１の厚さを測定するとともに、測定したシート状部材１の厚さ、成形ドラム２０の外径及び所定のスプライス量に基づいて次に成形ドラム２０に巻き付けるシート状部材１の適正長さＬ2 を算出し、算出した適正長さＬ2 になるように成形ドラム２０と転写ドラム２１との間隔または成形ドラム２０と転写ドラム２１の回転速度比を制御するようにしたので、次に成形ドラム２０に巻き付けるシート状部材１を常にスプライス量が適正になるように巻き付けることができ、スプライス異常による修正や不良品の発生を確実に防止することができる。   As described above, according to the present embodiment, the thickness of the sheet-like member 1 wound around the forming drum 20 is measured, and the measured thickness of the sheet-like member 1, the outer diameter of the forming drum 20, and the predetermined splice. Based on the amount, the appropriate length L2 of the sheet-like member 1 to be wound next around the forming drum 20 is calculated, and the distance between the forming drum 20 and the transfer drum 21 or the forming drum 20 and the transfer drum 21 so that the calculated appropriate length L2 is obtained. Since the rotation speed ratio of the drum 21 is controlled, the sheet-like member 1 to be wound next around the forming drum 20 can always be wound so that the splice amount is appropriate, and correction due to splice abnormality or generation of defective products can be prevented. It can be surely prevented.

この場合、厚さセンサ２３の測定データを記憶部２７に記憶するとともに、記憶した測定データに基づいて次回の成形時におけるシート状部材１の適正長さＬ2 を算出するようにしたので、同一仕様のタイヤの成形においては成形時ごとにシート状部材１の厚さを測定する必要がなくなり、成形工程の効率化を図ることができる。   In this case, the measurement data of the thickness sensor 23 is stored in the storage unit 27, and the appropriate length L2 of the sheet-like member 1 at the next molding is calculated based on the stored measurement data. In forming the tire, it is not necessary to measure the thickness of the sheet-like member 1 every time it is formed, and the efficiency of the forming process can be improved.

尚、前記実施形態では、成形ドラム２０と転写ドラム２１との間隔または成形ドラム２０と転写ドラム２１の回転速度比を制御することにより、成形ドラム２０に巻き付けるシート状部材１の長さが適正長さＬ2 になるようにしたものを示したが、他の方法として、成形ドラム２０の外径を制御することにより、転写ドラム２１から成形ドラム２０に巻き付けられるシート状部材１のスプライス量を適正にするようにしてもよい。即ち、所定長さＬ1 のシート状部材１に対し、成形ドラム２０の外径が小さくなるほど成形ドラム２０に巻き付けられるシート状部材１のスプライス量が多くなるので、シート状部材１の長さＬ1 と、厚さセンサ１３によって検出したシート状部材１の厚さＴと、スプライス量の基準値Ｓ1 とから、次式(3) によって成形ドラム２０の外径Ｄを算出し、
Ｄ＝（Ｌ1 −Ｓ1 ）／π−２Ｔ …(3)
算出した外径Ｄになるように成形ドラム２０の外径を拡大または縮小させる。これにより、前記実施形態と同様、次に成形ドラム２０に巻き付けるシート状部材１を常にスプライス量が適正になるように巻き付けることができ、スプライス異常による修正や不良品の発生を確実に防止することができる。 In the embodiment, the length of the sheet-like member 1 wound around the forming drum 20 is set to an appropriate length by controlling the distance between the forming drum 20 and the transfer drum 21 or the rotation speed ratio of the forming drum 20 and the transfer drum 21. However, as another method, by controlling the outer diameter of the forming drum 20, the splice amount of the sheet-like member 1 wound around the forming drum 20 from the transfer drum 21 can be appropriately adjusted. You may make it do. That is, with respect to the sheet-like member 1 having a predetermined length L1, the amount of splice of the sheet-like member 1 wound around the forming drum 20 increases as the outer diameter of the forming drum 20 decreases. From the thickness T of the sheet-like member 1 detected by the thickness sensor 13 and the reference value S1 of the splice amount, the outer diameter D of the forming drum 20 is calculated by the following equation (3):
D = (L1-S1) /. Pi.-2T (3)
The outer diameter of the forming drum 20 is enlarged or reduced so that the calculated outer diameter D is obtained. Thus, as in the above-described embodiment, the sheet-like member 1 to be wound next around the forming drum 20 can be wound so that the amount of splice is always appropriate, and correction due to splice abnormality and generation of defective products can be reliably prevented. Can do.

本発明の一実施形態を示すタイヤ成形装置の概略側面図1 is a schematic side view of a tire forming apparatus showing an embodiment of the present invention. 制御系を示すブロック図Block diagram showing the control system 制御部の動作を示すフローチャートFlow chart showing operation of control unit シート状部材の巻き付け動作を示す要部側面図Side view of main part showing winding operation of sheet-like member 本発明の他の実施形態を示すタイヤ成形装置の概略側面図The schematic side view of the tire shaping | molding apparatus which shows other embodiment of this invention. 制御系を示すブロック図Block diagram showing the control system 制御部の動作を示すフローチャートFlow chart showing operation of control unit 転写ドラムへのシート状部材の巻き付け動作を示す要部側面図Side view of essential parts showing winding operation of sheet-like member around transfer drum 成形ドラムへのシート状部材の巻き付け動作を示す要部側面図Side view of essential part showing winding operation of sheet-like member around forming drum

符号の説明Explanation of symbols

１…シート状部材、１０…成形ドラム、１１…第１のコンベア、１２…第２のコンベア、１３…ワイヤセンサ、１４…移動量センサ、１５…センサユニット、１６…切断装置、１７…測長センサ、１８…判定処理部、１９…警報装置。   DESCRIPTION OF SYMBOLS 1 ... Sheet-like member, 10 ... Forming drum, 11 ... 1st conveyor, 12 ... 2nd conveyor, 13 ... Wire sensor, 14 ... Movement amount sensor, 15 ... Sensor unit, 16 ... Cutting device, 17 ... Length measurement Sensor, 18 ... determination processing unit, 19 ... alarm device.

Claims (6)

ゴム材料からなるシート状部材を所定長さに切断して成形ドラムに巻き付けることにより、複数のシート状部材を順次成形ドラムに巻き付けて未加硫タイヤの一部を成形するタイヤ成形方法において、
前記成形ドラムに巻き付けられたシート状部材の厚さを測定するとともに、
測定したシート状部材の厚さ、成形ドラムの外径及び所定のスプライス量に基づいて次に成形ドラムに巻き付けるシート状部材の長さを算出し、
算出した長さになるように次のシート状部材を切断する
ことを特徴とするタイヤ成形方法。 In a tire molding method of forming a part of an unvulcanized tire by sequentially winding a plurality of sheet-like members around a molding drum by cutting a sheet-like member made of a rubber material into a predetermined length and winding it around a molding drum,
While measuring the thickness of the sheet-like member wound around the forming drum,
Based on the measured thickness of the sheet-like member, the outer diameter of the molding drum and a predetermined splice amount, the length of the sheet-like member to be wound around the molding drum next is calculated,
Cutting the next sheet-like member to have the calculated length. A tire molding method. ゴム材料からなる所定長さのシート状部材を転写ドラムに巻き付けるとともに、転写ドラムを成形ドラム側に移動し、転写ドラムに巻き付けられたシート状部材を転写ドラムによって成形ドラムに圧接させながら成形ドラムに巻き付けることにより、複数のシート状部材を順次成形ドラムに巻き付けて未加硫タイヤの一部を成形するタイヤ成形方法において、
前記成形ドラムに巻き付けられたシート状部材の厚さを測定するとともに、
測定したシート状部材の厚さ、成形ドラムの外径及び所定のスプライス量に基づいて次に成形ドラムに巻き付けるシート状部材の長さを算出し、
転写ドラムから成形ドラムに巻き付けられるシート状部材の長さが算出した長さになるように転写ドラムと成形ドラムとの間隔を制御する
ことを特徴とするタイヤ成形方法。 A sheet-like member of a predetermined length made of a rubber material is wound around the transfer drum, and the transfer drum is moved to the molding drum side, and the sheet-like member wound around the transfer drum is pressed against the molding drum by the transfer drum. In the tire molding method of forming a part of an unvulcanized tire by winding a plurality of sheet-like members sequentially around a molding drum by winding,
While measuring the thickness of the sheet-like member wound around the forming drum,
Based on the measured thickness of the sheet-like member, the outer diameter of the forming drum, and a predetermined amount of splice, calculate the length of the sheet-like member to be wound around the forming drum next,
A tire molding method, wherein the distance between the transfer drum and the molding drum is controlled so that the length of the sheet-like member wound around the molding drum from the transfer drum becomes the calculated length. ゴム材料からなる所定長さのシート状部材を転写ドラムに巻き付けるとともに、転写ドラムを成形ドラム側に移動し、転写ドラムに巻き付けられたシート状部材を各ドラムを回転させながら成形ドラムに巻き付けることにより、複数のシート状部材を順次成形ドラムに巻き付けて未加硫タイヤの一部を成形するタイヤ成形方法において、
前記成形ドラムに巻き付けられたシート状部材の厚さを測定するとともに、
測定したシート状部材の厚さ、成形ドラムの外径及び所定のスプライス量に基づいて次に成形ドラムに巻き付けるシート状部材の長さを算出し、
転写ドラムから成形ドラムに巻き付けられるシート状部材の長さが算出した長さになるように成形ドラムと転写ドラムの回転速度比を制御する
ことを特徴とするタイヤ成形方法。 By winding a sheet-like member of a predetermined length made of a rubber material around the transfer drum, moving the transfer drum to the molding drum side, and winding the sheet-like member wound around the transfer drum around the molding drum while rotating each drum. In the tire molding method of forming a part of the unvulcanized tire by sequentially winding a plurality of sheet-like members around a molding drum,
While measuring the thickness of the sheet-like member wound around the forming drum,
Based on the measured thickness of the sheet-like member, the outer diameter of the molding drum and a predetermined splice amount, the length of the sheet-like member to be wound around the molding drum next is calculated,
A tire molding method comprising: controlling a rotation speed ratio between a molding drum and a transfer drum so that a length of a sheet-like member wound around the molding drum from the transfer drum becomes a calculated length. 前記シート状部材の厚さの測定値を記憶しておき、記憶した測定値に基づいて成形ドラムに巻き付けるシート状部材の長さを算出する
ことを特徴とする請求項２または３記載のタイヤ成形方法。 The tire molding according to claim 2 or 3, wherein a measurement value of the thickness of the sheet-like member is stored, and a length of the sheet-like member wound around the forming drum is calculated based on the stored measurement value. Method. ゴム材料からなる所定長さのシート状部材を転写ドラムに巻き付けるとともに、転写ドラムに巻き付けられたシート状部材を外径が拡大及び縮小可能な成形ドラムに巻き付けることにより、複数のシート状部材を順次成形ドラムに巻き付けて未加硫タイヤの一部を成形するタイヤ成形方法において、
前記成形ドラムに巻き付けられたシート状部材の厚さを測定するとともに、
シート状部材の長さ、測定したシート状部材の厚さ及び所定のスプライス量に基づいて次に成形ドラムに巻き付けられるシート状部材のスプライス量が所定量となる成形ドラムの外径を算出し、
算出した外径になるように成形ドラムの外径を拡大または縮小する
ことを特徴とするタイヤ成形方法。 A sheet-like member of a predetermined length made of a rubber material is wound around the transfer drum, and the sheet-like member wound around the transfer drum is wound around a molding drum whose outer diameter can be enlarged and reduced, thereby sequentially arranging a plurality of sheet-like members. In a tire molding method in which a part of an unvulcanized tire is molded around a molding drum,
While measuring the thickness of the sheet-like member wound around the forming drum,
Based on the length of the sheet-like member, the measured thickness of the sheet-like member, and a predetermined amount of splice, calculate the outer diameter of the forming drum where the splice amount of the sheet-like member to be wound around the forming drum next becomes a predetermined amount,
A tire molding method characterized by enlarging or reducing the outer diameter of a molding drum so as to have a calculated outer diameter. 前記シート状部材の厚さの測定値を記憶しておき、記憶したデータに基づいて成形ドラムの外径を算出する
ことを特徴とする請求項５記載のタイヤ成形方法。 The tire molding method according to claim 5, wherein a measured value of the thickness of the sheet-like member is stored, and an outer diameter of the molding drum is calculated based on the stored data.
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Publication number Priority date Publication date Assignee Title
JP2009113235A (en) * 2007-11-02 2009-05-28 Bridgestone Corp Apparatus for supplying tire component member
JP2010099935A (en) * 2008-10-23 2010-05-06 Bridgestone Corp Green tire manufacturing apparatus
JP2010208132A (en) * 2009-03-10 2010-09-24 Yokohama Rubber Co Ltd:The Method and device of forming band-like rubber member
JP2011213024A (en) * 2010-03-31 2011-10-27 Yokohama Rubber Co Ltd:The Molding method of strip member
JP2012161997A (en) * 2011-02-07 2012-08-30 Bridgestone Corp Device for manufacturing moldings including belt member and method for manufacturing these moldings
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