JPH0429540B2 - - Google Patents
Info
- Publication number
- JPH0429540B2 JPH0429540B2 JP58122668A JP12266883A JPH0429540B2 JP H0429540 B2 JPH0429540 B2 JP H0429540B2 JP 58122668 A JP58122668 A JP 58122668A JP 12266883 A JP12266883 A JP 12266883A JP H0429540 B2 JPH0429540 B2 JP H0429540B2
- Authority
- JP
- Japan
- Prior art keywords
- bead wire
- bladder
- carcass ply
- ply band
- drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
- 239000011324 bead Substances 0.000 claims description 56
- 230000007246 mechanism Effects 0.000 claims description 34
- 238000000034 method Methods 0.000 claims description 14
- 238000000465 moulding Methods 0.000 claims description 13
- 230000037303 wrinkles Effects 0.000 claims description 8
- 230000002093 peripheral effect Effects 0.000 description 6
- 239000012528 membrane Substances 0.000 description 4
- 238000013459 approach Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000007723 transport mechanism Effects 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
Classifications
-
- 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
- B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
-
- 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
- B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
- B29D2030/3207—Positioning the beads
-
- 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
- B29D30/32—Fitting the bead-rings or bead-cores; Folding the textile layers around the rings or cores
- B29D2030/3221—Folding over means, e.g. bladders or rigid arms
- B29D2030/3242—Folding over means, e.g. bladders or rigid arms and with means for pressing the bladder against the ply material, e.g. bladder guide shoes, cages, arms
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tyre Moulding (AREA)
Description
【発明の詳細な説明】
この発明は空気入りタイヤの成形機に関するも
のであり、詳しくはポジテイブ成形方式において
カーカスプライバンドを折り返す装置に係る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pneumatic tire molding machine, and more particularly to a device for folding back a carcass ply band in a positive molding method.
一般に、タイヤ成形機においては次の２つの方
式が採用されている。すなわち、（）比較的小
型のサイズのタイヤを成形する場合に行われる方
式で、縮径した状態の成形ドラムの周面上にカー
カスプライを巻付けた後その周囲にビードワイヤ
を供給配置し、その後成形ドラムを拡径させ、ビ
ードワイヤの周囲にカーカスプライを折り返して
タイヤを成形する方式と、（）トラツクやバス
用のタイヤのように特に大型のサイズのタイヤを
成形する場合に行われる方式で、縮径した状態の
成形ドラムの周面に別工程で形成したカーカスプ
ライバンドを装着した後成形ドラムを、拡径し、
次に、カーカスプライバンドをほぼビードワイヤ
の内径に近い径まで縮径させ、該ドラムの軸方向
両端に拡径した該ドラムの外径よりも小径のビー
ドワイヤを供給配置した後、ビードワイヤの内周
に沿つてカーカスプライバンドの両端部を折り返
してタイヤを成形する所謂ポジテイブ成形方式と
である。 Generally, the following two methods are employed in tire molding machines. In other words, () this is a method used when molding tires of relatively small size, in which a carcass ply is wrapped around the circumferential surface of a molding drum in a reduced diameter state, a bead wire is supplied and placed around it, and then a bead wire is placed around it. There are two methods: (1) expanding the diameter of the forming drum and folding the carcass ply around the bead wire to form the tire, and (2) the method used when forming especially large tires such as truck and bus tires. After attaching a carcass ply band formed in a separate process to the circumferential surface of the forming drum in a reduced diameter state, the forming drum is expanded in diameter.
Next, the carcass ply band is reduced in diameter to a diameter close to the inner diameter of the bead wire, and bead wires having a smaller diameter than the enlarged outer diameter of the drum are placed at both ends of the drum in the axial direction. This is a so-called positive molding method in which both ends of the carcass ply band are folded back along the tire to mold the tire.
後者、（）の方式においては、特開昭49−
33977号に開示されているような装置が提案され
ている。しかしながら、この装置にあつては、カ
ーカスプライバンドを折り返す際ビードワイヤを
柔軟なブラダーのみによつて支持しているため、
ビードワイヤを正確にドラムと同心に位置決めし
ておくことが難しく、位置ずれを生じ易かつた。
そして、ビードワイヤの位置がずれた場合にはビ
ードワイヤの内周側においてカーカスプライバン
ドにしわが発生し、エア巻き込みの原因となつた
り、折り返されたカーカスプライバンドの端縁の
位置にばらつきが生じて完成された製品タイヤの
ユニフオーミテイが不良となる、等の不具合が生
じるので、熟練作業者による慎重な作業が要求さ
れ、タイヤ成形作業の能率向上を阻害する要因と
なつていた。 In the latter method, ()
A device such as that disclosed in No. 33977 has been proposed. However, in this device, the bead wire is supported only by a flexible bladder when folding the carcass ply band, so
It is difficult to accurately position the bead wire concentrically with the drum, and misalignment is likely to occur.
If the position of the bead wire is misaligned, wrinkles will occur in the carcass ply band on the inner circumferential side of the bead wire, causing air entrainment, or variations in the position of the edge of the folded carcass ply band may occur, resulting in completion of the carcass ply band. Since defects such as poor uniformity of the manufactured tire occur, careful work by skilled workers is required, which is a factor that hinders improvement in the efficiency of tire molding work.
この発明はこのような従来の問題点に着目して
なされたものであり、熟練作業者による慎重な作
業を要求されることがなく、作業の能率を向上で
き、しかもユニフオーミテイの良い製品タイヤを
成形できる、ポジテイブ成形方式におけるカーカ
スプライバンド折り返し装置を提供することを目
的としている。 This invention was made by focusing on these conventional problems, and it does not require careful work by skilled workers, improves work efficiency, and molds product tires with good uniformity. It is an object of the present invention to provide a carcass ply band folding device using a positive molding method.
そして、この発明の特徴とするところは、タイ
ヤ成形ドラムの軸方向端部で折り込まれたカーカ
スプライバンドの両端をビードワイヤの内周に沿
つて折り返すタイヤ成形機におけるカーカスプラ
イバンド折り返し装置において、前記タイヤ成形
ドラムの軸方向端部内周側に配設され、前記タイ
ヤ成形ドラムの端部に対して一時的に停止可能に
膨張接近してビードワイヤ近傍のカーカスプライ
バンドのしわを広げた後、カーカスプライバンド
を折り返すブラダー膜を有するブラダー機構と、
該ブラダー機構のブラダー内部に半径方向外方に
向かつて突出可能に設けられ、突出したとき前記
ブラダー膜および前記カーカスプライバンドを介
して前記ビードワイヤに内周方向から当接して該
ビードワイヤを所定位置に保持するビードワイヤ
保持機構と、前記ブラダー膜の膨張が一時的に停
止したとき前記ビードワイヤ保持機構をブラダー
内部へ突出させる作動機構と、を具備してなるポ
ジテイブ成形方式におけるカーカスプライバンド
折り返し装置にある。 The present invention is characterized in that a carcass ply band folding device for a tire forming machine folds both ends of a carcass ply band folded at an axial end of a tire forming drum along the inner circumference of a bead wire. The carcass ply band is disposed on the inner circumferential side of the axial end of the tire forming drum, and is temporarily inflated and approaches the end of the tire forming drum in a stoppable manner to spread out wrinkles in the carcass ply band near the bead wire. a bladder mechanism having a bladder membrane that folds back;
It is provided inside the bladder of the bladder mechanism so as to be able to protrude outward in the radial direction, and when protruding comes into contact with the bead wire from the inner circumferential direction via the bladder membrane and the carcass ply band to hold the bead wire in a predetermined position. The present invention provides a carcass ply band folding device for a positive molding method, comprising a bead wire holding mechanism for holding the bead wire and an actuation mechanism for projecting the bead wire holding mechanism into the interior of the bladder when expansion of the bladder membrane is temporarily stopped.
以下、この発明を図面に基づいて説明する。第
１図乃至第８図はこの発明の一実施例を示してお
り、まず、第１図について構成を説明する。図は
タイヤ成形ドラム１の軸方向片側部分のみを示し
ているが、反対側も同様の構成になつている。前
記タイヤ成形ドラム（以下略して単にドラムと呼
ぶ）１は、周方向に複数に分割されたドラムセグ
メント２によつて構成されており、拡縮径可能で
ある。図ではドラム１は拡径状態になつている。
３はドラム１の軸方向端部に対して同軸に接近離
隔可能に設けられ、ドラム１に装着されたカーカ
スプライバンド４の軸方向端部４ａを半径方向内
側に折り込むための公知の折り込み羽根板であ
る。５は、ビードワイヤ６をドラム１と同心に保
持してドラム１の端部に搬送供給する公知のビー
ドワイヤ搬送機構である。このビードワイヤ搬送
機構５はビードワイヤ６の内周面を支持する支持
部材７と、ビードワイヤ６の一側面に当接してビ
ードワイヤ６をドラム１の端面に押圧し、位置決
めする押圧板８と、その外周側に位置して後述す
るブラダーを変形させる外輪部９と、を有してい
る。１０はドラム１の軸方向端部側にドラム１に
対し同心に接近離隔可能に設けられた環状体であ
り、１１は環状体１０の外周面に取付けられたブ
ラダーである。環状体１０には、ブラダー内１１
に圧空を吹き込んで膨張させたり、圧空を排出さ
せて収縮させたりするための複数の空気孔１２
が、第２図に示すように、円周方向に互いに所定
角度離隔して設けられており、各空気孔１２は第
３図に示すように途中に切換弁（図示省略）を設
けたエア配管１３によつて図外の圧空源に接続さ
れている。前記環状体１０、ブラダー１１、エア
配管１３は組み合わさり、カーカスプライバンド
４の端部４ａをビードワイヤ６の内周面に沿つて
半径方向外側へ折り返すためのブラダー機構１４
を構成している。第１図に戻つて、１５は環状体
１０の各空気孔１２と空気孔１２の間に放射方向
に向けて穿設された孔１６にそれぞれ進退可能に
挿入されたピン部材である。ピン部材１５の一端
部、すなわち環状体１０の半径方向外側の端部、
にはビードワイヤ保持部材１７が取付けられてお
り、他端部には回転ローラ１８が取付けられてい
る。ピン部材１５、ビードワイヤ保持部材１７、
回転ローラ１８は組み合わさりビードワイヤ保持
機構１９を構成している。２０は環状体１０の内
周面１０ａに沿つて軸方向に摺動可能に設けられ
たブロツクであり、断面Ｔ字型の傾斜溝２１を有
している。このブロツク２０は環状体１０に固定
されたエアシリンダ２２のピストンロツド２２ａ
の先端に連結されており、このブロツク２０とエ
アシリンダ２２は、第２図から明らかなように、
前記各ビードワイヤ保持機構１９に対応して各エ
ア配管１３とエア配管１３の間にそれぞれ設けら
れている。そして、前記ビードワイヤ保持機構１
９の回転ローラ１８側の端部は、第１図から明ら
かなように、それぞれ対応するブロツク２０の傾
斜溝２１に移動可能に挿入されている。この結
果、ビードワイヤ保持機構１９はブロツク２０の
進退に応じて傾斜溝２１に沿つて放射外方、すな
わちブラダー１１内へ突出したり引つ込んだりす
ることができる。前記エアシリンダ２２とブロツ
ク２０とは組み合わさつてビードワイヤ保持機構
１９を作動させる作動機構２３を構成している。 The present invention will be explained below based on the drawings. FIGS. 1 to 8 show an embodiment of the present invention, and first, the configuration of FIG. 1 will be explained. Although the figure shows only one side of the tire building drum 1 in the axial direction, the opposite side has a similar configuration. The tire building drum (hereinafter simply referred to as a drum) 1 is constituted by a plurality of drum segments 2 divided in the circumferential direction, and is capable of expanding and contracting in diameter. In the figure, the drum 1 is in an enlarged diameter state.
Reference numeral 3 denotes a known folding blade plate which is provided so as to be coaxially close to and away from the axial end of the drum 1, and is used to fold in the axial end 4a of the carcass ply band 4 attached to the drum 1 in the radial direction. It is. 5 is a known bead wire transport mechanism that holds the bead wire 6 concentrically with the drum 1 and transports it to the end of the drum 1. This bead wire conveying mechanism 5 includes a support member 7 that supports the inner peripheral surface of the bead wire 6, a pressing plate 8 that contacts one side of the bead wire 6 to press and position the bead wire 6 against the end surface of the drum 1, and the outer peripheral side of the It has an outer ring portion 9 located at the outer ring portion 9 for deforming the bladder, which will be described later. 10 is an annular body provided on the axial end side of the drum 1 so as to be able to approach and separate from the drum 1 concentrically, and 11 is a bladder attached to the outer peripheral surface of the annular body 10. The annular body 10 includes a bladder 11
A plurality of air holes 12 for blowing compressed air into it to inflate it or discharging it to make it deflate.
As shown in FIG. 2, they are provided at a predetermined angle from each other in the circumferential direction, and each air hole 12 is an air pipe with a switching valve (not shown) in the middle, as shown in FIG. 13, it is connected to a compressed air source (not shown). The annular body 10, bladder 11, and air pipe 13 are combined to form a bladder mechanism 14 for folding back the end portion 4a of the carcass ply band 4 radially outward along the inner peripheral surface of the bead wire 6.
It consists of Returning to FIG. 1, reference numeral 15 designates pin members inserted into holes 16 formed in the radial direction between each air hole 12 of the annular body 10 so as to be able to move forward and backward. One end of the pin member 15, that is, the radially outer end of the annular body 10;
A bead wire holding member 17 is attached to the end, and a rotating roller 18 is attached to the other end. pin member 15, bead wire holding member 17,
The rotating rollers 18 are combined to form a bead wire holding mechanism 19. A block 20 is provided so as to be slidable in the axial direction along the inner circumferential surface 10a of the annular body 10, and has an inclined groove 21 having a T-shaped cross section. This block 20 is a piston rod 22a of an air cylinder 22 fixed to the annular body 10.
As is clear from FIG. 2, the block 20 and air cylinder 22 are connected to the tip of the
Each bead wire holding mechanism 19 is provided between each air pipe 13 in correspondence with the bead wire holding mechanism 19 . And the bead wire holding mechanism 1
As is clear from FIG. 1, the ends of the blocks 9 on the rotating roller 18 side are movably inserted into the inclined grooves 21 of the corresponding blocks 20. As a result, the bead wire holding mechanism 19 can protrude or retract radially outward, that is, into the bladder 11 along the inclined groove 21 as the block 20 moves forward or backward. The air cylinder 22 and block 20 together constitute an operating mechanism 23 for operating the bead wire holding mechanism 19.
次に作用を説明する。 Next, the action will be explained.
拡径されたドラム１の外周に、予め他の工程で
形成されたカーカスプライバンド４を装着した
後、ブラダー機構１４をドラム１の両端部に接近
させる。次に、折り込み羽根板３をドラム１の端
部に接近させ、カーカスプライバンド４の両端部
４ａ，４ａをドラム１の端部形状に沿つて半径方
向内側に折り込む。このように折り込まれる際、
カーカスプライバンド４は縮径するためしわが寄
り、そのしわも一様ではない。次に、ビードワイ
ヤ搬送機構５によつてビードワイヤ６がドラム１
の両端部に搬送され、押圧位置決めされる。この
状態が第１図に示す状態である。ビードワイヤ６
が位置決めされると、ビードワイヤ搬送機構５の
支持部材７が第４図に示すように矢印方向に後退
し、ビードワイヤ６の内周面から離れる。次に、
図外の圧空源からエア配管１３、空気孔１２を通
じてブラダー１１内に所定量の圧空が供給され
る。その結果、ブラダー１１が第５図に示すよう
にある程度膨張して、カーカスプライバンド４の
両端部４ａ，４ａに半径方向内側から接触し、し
わを拡げるようにして半径方向外側へ持ち上げ
る。このときブラダー１１を、ビードワイヤ６の
内周部においてカーカスプライバンド４にしわが
寄らないようカーカスプライバンド４に密着する
程度に膨張させるのが望ましい。そのため、低圧
の圧空で緩慢に膨張させるのがよい。前述したよ
うに、ブラダー１１が膨張し、カーカスプライバ
ンド４のしわを除去したところでブラダー１１へ
の圧空の供給を一時停止する。そして、エアシリ
ンダ２２のピストンロツド２２ａを突出させる
と、ビードワイヤ保持機構１９がブロツク２０の
傾斜溝２１に案内されて軸方向に移動し、環状体
１０から放射方向にブラダー１１の内部へ突出す
る。その結果、ビードワイヤ保持機構１９のビー
ドワイヤ保持部材１７が、第６図に示すように、
ブラダー１１のブラダー膜１１ａおよびカーカス
プライバンド４を介してビートワイヤ６の内周面
に当接し、ドラム１と同心に位置決め固定する。
次に、ビードワイヤ搬送機構５および折り込み羽
根板３が、第７図に示すように、ドラム１の端部
から離隔した待機位置へと戻る。しかしながら、
ビードワイヤ６は前述したようにビードワイヤ保
持機構１９によつて所定位置に正確に位置決め固
定されているため位置ずれを起こすことはない。
また、カーカスプライバンド４もブラダー１１が
密着しているためしわが寄ることはない。このよ
うな状態において、再びブラダー１１に圧空が供
給され膨張を開始する。このブラダー１１の膨張
の途中で、ビードワイヤ搬送機構５を所定位置ま
でドラム１に接近させ、第８図に示すように、ブ
ラダー１１を押圧変形させることによりカーカス
プライバンド４をビードワイヤ６に沿つて半径方
向外側へ完全に折り返す。カーカスプライバンド
４の折り返しが終了したら、ビードワイヤ搬送機
構５を再び待機位置へ戻し、シリンダ２２のピス
トンロツド２２ａを後退させる。その結果、ブロ
ツク２０の移動により、ビードワイヤ保持機構１
９は傾斜溝２１に沿つて自重で環状体１０の軸方
向へと引つ込む。次いで、ブラダー１１内の圧空
を排出しブラダー１１を完全に収縮させて、カー
カスプライバンド４の折り返し作業の一サイクル
を終了する。 After attaching the carcass ply band 4 previously formed in another process to the outer periphery of the drum 1 whose diameter has been expanded, the bladder mechanism 14 is brought close to both ends of the drum 1. Next, the folded wing plate 3 is brought close to the end of the drum 1, and both ends 4a, 4a of the carcass ply band 4 are folded inward in the radial direction along the shape of the end of the drum 1. When folded like this,
The carcass ply band 4 is wrinkled due to its diameter reduction, and the wrinkles are not uniform. Next, the bead wire 6 is transferred to the drum 1 by the bead wire conveyance mechanism 5.
It is conveyed to both ends of and pressed into position. This state is the state shown in FIG. bead wire 6
When the bead wire transport mechanism 5 is positioned, the support member 7 of the bead wire conveying mechanism 5 moves back in the direction of the arrow as shown in FIG. next,
A predetermined amount of compressed air is supplied into the bladder 11 through an air pipe 13 and an air hole 12 from a compressed air source (not shown). As a result, the bladder 11 expands to some extent as shown in FIG. 5, contacts both ends 4a, 4a of the carcass ply band 4 from the inside in the radial direction, and lifts the bladder 11 outward in the radial direction so as to spread out the wrinkles. At this time, it is desirable to inflate the bladder 11 to such an extent that it comes into close contact with the carcass ply band 4 so that the carcass ply band 4 is not wrinkled at the inner peripheral portion of the bead wire 6. Therefore, it is best to slowly inflate with low-pressure air. As described above, when the bladder 11 is inflated and the wrinkles of the carcass ply band 4 are removed, the supply of compressed air to the bladder 11 is temporarily stopped. Then, when the piston rod 22a of the air cylinder 22 is projected, the bead wire holding mechanism 19 is guided by the inclined groove 21 of the block 20, moves in the axial direction, and projects into the interior of the bladder 11 from the annular body 10 in the radial direction. As a result, the bead wire holding member 17 of the bead wire holding mechanism 19, as shown in FIG.
It contacts the inner peripheral surface of the beat wire 6 via the bladder membrane 11a of the bladder 11 and the carcass ply band 4, and is positioned and fixed concentrically with the drum 1.
Next, the bead wire conveying mechanism 5 and the folding vane 3 return to a standby position spaced apart from the end of the drum 1, as shown in FIG. however,
As described above, the bead wire 6 is accurately positioned and fixed at a predetermined position by the bead wire holding mechanism 19, so that no displacement occurs.
Further, since the carcass ply band 4 is also in close contact with the bladder 11, it does not wrinkle. In this state, compressed air is supplied to the bladder 11 again and it starts expanding. During the expansion of the bladder 11, the bead wire conveying mechanism 5 is brought close to the drum 1 to a predetermined position, and as shown in FIG. Fold completely outward. When the carcass ply band 4 has been folded back, the bead wire conveyance mechanism 5 is returned to the standby position and the piston rod 22a of the cylinder 22 is moved back. As a result, the movement of the block 20 causes the bead wire holding mechanism 1 to
9 retracts along the inclined groove 21 in the axial direction of the annular body 10 by its own weight. Next, the compressed air in the bladder 11 is discharged, the bladder 11 is completely deflated, and one cycle of the carcass ply band 4 folding operation is completed.
以上説明してきたように、この発明によれば、
カーカスプライバンドをビードワイヤに沿つて完
全に折り返してしまうまで、ビードワイヤを正確
にドラムと同心に固定しておくことができるた
め、カーカスプライバンドにエアを巻き込みの原
因となるしわが寄りが難く、また折り返されたカ
ーカスプライバンドの端縁の位置のばらつきも小
さいため、ユニフオーミテイが良く良質な製品タ
イヤを得ることができる。更に、熟練作業者によ
る慎重な作業を要求されることもないため、タイ
ヤ成形作業の能率を向上させることもできる。 As explained above, according to this invention,
Since the bead wire can be fixed precisely concentrically with the drum until the carcass ply band is completely folded back along the bead wire, wrinkles that can cause air to be drawn into the carcass ply band are less likely to form. Since the variation in the position of the edge of the folded carcass ply band is small, it is possible to obtain a product tire with good uniformity and high quality. Furthermore, since careful work by skilled workers is not required, the efficiency of tire molding work can be improved.
第１図はこの発明に係るポジテイブ成形方式に
おけるカーカスプライバンド折り返し装置の一実
施例の要部の断面図、第２図は第１図の−矢
視断面図、第３図は第２図の−矢印断面図、
第４図乃至第８図はそれぞれ第１図の装置の作動
状態を示す断面図である。
１……タイヤ成形ドラム、４……カーカスプラ
イバンド、６……ビードワイヤ、１１……ブラダ
ー、１４……ブラダー機構、１９……ビードワイ
ヤ保持機構、２３……ビードワイヤ保持機構の作
動機構。
FIG. 1 is a sectional view of a main part of an embodiment of a carcass ply band folding device in a positive molding method according to the present invention, FIG. 2 is a sectional view taken along the - arrow in FIG. − arrow cross-sectional view;
4 to 8 are sectional views showing the operating state of the apparatus of FIG. 1, respectively. DESCRIPTION OF SYMBOLS 1... Tire forming drum, 4... Carcass ply band, 6... Bead wire, 11... Bladder, 14... Bladder mechanism, 19... Bead wire holding mechanism, 23... Operating mechanism of bead wire holding mechanism.
Claims (1)
たカーカスプライバンドの両端をビードワイヤの
内周に沿つて折り返すポジテイブ成形方式におけ
るカーカスプライバンド折り返し装置において、
前記タイヤ成形ドラムの軸方向端部側に配設さ
れ、該端部に対して半径方向内側から一時的に停
止可能に膨張接近してビードワイヤ近傍のカーカ
スプライバンドのしわを広げた後、カーカスプラ
イバンドを折り返すブラダーを有するブラダー機
構と、該ブラダー機構のブラダー内部に半径方向
外方に向かつて突出可能に設けられ、突出したと
き前記ブラダーおよび前記カーカスプライバンド
を介して前記ビードワイヤに内周方向から当接し
て該ビードワイヤを所定位置に保持するビードワ
イヤ保持機構と、前記ブラダーの膨張が一時的に
停止したとき前記ビードワイヤ保持機構をブラダ
ー内部へ突出させる作動機構と、を具備してなる
ことを特徴とするポジテイブ成形方式におけるカ
ーカスプライバンド折り返し装置。1. In a carcass ply band folding device in a positive molding method in which both ends of a carcass ply band folded at an axial end of a tire forming drum are folded back along the inner circumference of a bead wire,
The carcass ply band is disposed on the axial end side of the tire building drum, and is temporarily and stopably inflated and approached from the radially inner side of the tire forming drum to widen the wrinkles in the carcass ply band near the bead wire, and then the carcass ply band is expanded. a bladder mechanism having a bladder for folding back a band; and a bladder mechanism provided inside the bladder of the bladder mechanism so as to be able to protrude outward in a radial direction; It is characterized by comprising a bead wire holding mechanism that abuts to hold the bead wire in a predetermined position, and an actuation mechanism that causes the bead wire holding mechanism to project into the interior of the bladder when expansion of the bladder temporarily stops. Carcass ply band folding device for positive molding method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58122668A JPS6015136A (en) | 1983-07-06 | 1983-07-06 | Carcass ply band turning apparatus of tire molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58122668A JPS6015136A (en) | 1983-07-06 | 1983-07-06 | Carcass ply band turning apparatus of tire molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6015136A JPS6015136A (en) | 1985-01-25 |
| JPH0429540B2 true JPH0429540B2 (en) | 1992-05-19 |
Family
ID=14841676
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58122668A Granted JPS6015136A (en) | 1983-07-06 | 1983-07-06 | Carcass ply band turning apparatus of tire molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6015136A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998021025A1 (en) * | 1996-11-11 | 1998-05-22 | Bridgestone Corporation | Single stage molding machine for radial tires |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2519069B2 (en) * | 1987-10-06 | 1996-07-31 | 株式会社ブリヂストン | Tire building equipment |
| WO2009063264A1 (en) * | 2007-11-15 | 2009-05-22 | Pirelli Tyre S.P.A. | Process for manufacturing tyres for vehicle wheels and apparatus for building a carcass structure of a tyre for vehicle wheels |
| BR112013006549B1 (en) * | 2010-09-28 | 2020-02-18 | Pirelli Tyre S.P.A | PROCESS AND APPARATUS FOR MANUFACTURING A TIRE FOR VEHICLE WHEELS |
-
1983
- 1983-07-06 JP JP58122668A patent/JPS6015136A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998021025A1 (en) * | 1996-11-11 | 1998-05-22 | Bridgestone Corporation | Single stage molding machine for radial tires |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6015136A (en) | 1985-01-25 |
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