JPS60196330A - Molding drum of tire - Google Patents
Molding drum of tireInfo
- Publication number
- JPS60196330A JPS60196330A JP59054098A JP5409884A JPS60196330A JP S60196330 A JPS60196330 A JP S60196330A JP 59054098 A JP59054098 A JP 59054098A JP 5409884 A JP5409884 A JP 5409884A JP S60196330 A JPS60196330 A JP S60196330A
- Authority
- JP
- Japan
- Prior art keywords
- drum
- segment
- cover plate
- movable
- fixed
- 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.)
- Pending
Links
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
- B29D30/24—Drums
- B29D30/244—Drums for manufacturing substantially cylindrical tyre components with cores or beads, e.g. carcasses
- B29D30/246—Drums for the multiple stage building process, i.e. the building-up of the cylindrical carcass is realised on one drum and the toroidal expansion is realised after transferring on another drum
- B29D30/247—Arrangements for the first stage only, e.g. means for radially expanding the drum to lock the beads
Landscapes
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【発明の詳細な説明】 この発明はタイヤ成形機のタイヤ成形ドラムに関する。[Detailed description of the invention] The present invention relates to a tire forming drum for a tire forming machine.
タイヤ成形機のタイヤ成形ドラム（以下、ドラムと略称
）で径の拡縮が可能であり、かつ、ドラム幅（ドラム外
周面の軸方向長さを言うものとする）の拡縮も可能なも
のとしては、例えば第１図＋ａ）、ｌｂ）に示すような
ものがある。このドラム１の外周部は、それぞれドラム
本体部分２の半径方向外端部に周方向に交互に取付けら
れドラム本体部分２とともにドラム半径方向に移動可能
な、山形セグメント３と扇形セグメント４とによって構
成されている。山形セグメント３と扇形セグメント４の
ドラム半径方向外端面には、ドラム外周面を構成するカ
バープレート５がそれぞれ取付けられている。山形セグ
メント３と扇形セグメント４とは、第１図（８１に示す
ように、ドラム拡径時には同心状位置で互いに接触し合
うが、ドラム縮径時には山形セグメント３が扇形セグメ
ント４よりも半径方向中心側により多く移動し、扇形セ
グメント４同士が接触し合ったドラム外周を構成するよ
うになっている。また、山形セグメント３および扇形セ
グメント４は、それぞれドラムの軸方向両端部に第１図
（ｂｌに示すようにドラムの軸方向（第１図（ｂｌの矢
印方向）に摺動可能でドラム外周面を構成する摺動部材
６．６を有している。そして、ドラム幅の拡大は、これ
ら各セグメント３．４両端部の摺動部材６．６を互いに
離間させる方向へ、また、縮小は互いに接近させる方向
へ摺動させることによって行う。A tire molding drum (hereinafter referred to as drum) of a tire molding machine whose diameter can be expanded or contracted and whose drum width (the axial length of the outer peripheral surface of the drum) can also be expanded or contracted is as follows: , for example, those shown in Figure 1+a), lb). The outer periphery of the drum 1 is constituted by chevron-shaped segments 3 and sector-shaped segments 4, which are respectively attached alternately in the circumferential direction to the radially outer end of the drum body part 2 and are movable together with the drum body part 2 in the drum radial direction. has been done. A cover plate 5 constituting the outer peripheral surface of the drum is attached to the outer end surface of the chevron segment 3 and the sector segment 4 in the radial direction of the drum, respectively. As shown in FIG. 1 (81), the chevron segment 3 and the fan-shaped segment 4 contact each other at concentric positions when the drum diameter is expanded, but when the drum diameter is contracted, the chevron segment 3 is closer to the center in the radial direction than the fan-shaped segment 4. 1 (bl As shown in Fig. 1, the drum has a sliding member 6.6 that is slidable in the axial direction (direction of the arrow in Fig. 1 (bl)) and constitutes the outer peripheral surface of the drum. Reduction is achieved by sliding the sliding members 6.6 at both ends of each segment 3.4 in the direction of separating them from each other, and in the direction of bringing them closer to each other.
しかしながら、このような構成のドラム１にあっては、
ドラム幅の拡縮は容易であるが、縮径させる際に山形セ
グメン１〜３を扇形セグメント４よりもドラム半径方向
中心側にずらせるようになっているため、タイヤビード
リム径に比し、生タイヤ外径が著しく大となるようなド
ラムではドラム径の拡縮を十分に行うことができないと
いう問題点があった。However, in the drum 1 having such a configuration,
Although it is easy to expand or contract the width of the drum, since the chevron segments 1 to 3 are shifted closer to the center in the radial direction of the drum than the fan-shaped segment 4 when reducing the diameter, the width of the drum is smaller than the tire bead rim diameter. There is a problem in that the drum diameter cannot be sufficiently expanded or contracted in a drum having a significantly large tire outer diameter.
そこで、第２図（ａｌ、（ｂ）、（Ｃ１に示すようなド
ラム８が開発された。このドラム８は、その外周がドラ
ム本体部分９の半径方向外端部にそれぞれ取付けられ、
ドラム本体部分９とともにドラム半径方向に移動可能な
同一形状の複数のセグメント１０によって構成されてい
る。そして、このセグメント１０のドラム半径方向外端
面には、ドラム外周面を構成するカバープレート１１が
取付けられている。各カバープレート１１は、その幅方
゛向くドラム周方向）の一端部が隣接するセグメント１
０まで延びており、この隣接するセグメント１０のカバ
ープレート１１上に摺動可能に載置された状態になって
いる。また、各セグメント１０のドラム軸方向両端部に
は、第２図（ｂｌに示すように、ドラム軸方向（第２図
（ｂｌの矢印方向）に摺動可能でドラム外周面を構成す
る摺動部材１２が設けられている。そして、ドラム幅の
拡縮は、各セグメント１０の両端部の摺動部材１２．１
２を互いに離間する方向、あるいは接近する方向へ摺動
させることによって行なうようになっている。Therefore, a drum 8 as shown in FIGS. 2(al, 2b) and 2(c1) was developed.
It is constituted by a plurality of segments 10 of the same shape that are movable in the drum radial direction together with the drum body portion 9. A cover plate 11 constituting the outer peripheral surface of the drum is attached to the outer end surface of the segment 10 in the drum radial direction. Each cover plate 11 has an adjacent segment 1 at one end in its width direction (in the drum circumferential direction).
0 and is slidably mounted on the cover plate 11 of the adjacent segment 10. In addition, at both ends of each segment 10 in the drum axis direction, as shown in FIG. A member 12 is provided.The drum width can be expanded or contracted by sliding members 12.1 at both ends of each segment 10.
This is done by sliding the parts 2 away from each other or towards each other.
しかしながら、このような構成のドラム８にあっては、
摺動部材１２のドラム周方向の幅がカバープレート１１
の幅よりも狭いため、ドラム幅を拡大したとき、すなわ
ち摺動部材１２を互いに離間する方向へ摺動させたとき
、第２図（ｃ）に示ずように摺動部材１２によって構成
されるドラム外周面に隙間１３が生じ、タイヤ構成部利
を貼付する際に接着不良等が発生ずる原因となるといっ
た問題点があった。However, in the drum 8 having such a configuration,
The width of the sliding member 12 in the drum circumferential direction is equal to the width of the cover plate 11.
Since the width of the drum is narrower than the width of the drum, when the drum width is expanded, that is, when the sliding members 12 are slid in the direction away from each other, the drum is configured by the sliding members 12 as shown in FIG. 2(c). There is a problem in that a gap 13 is formed on the outer circumferential surface of the drum, which causes poor adhesion when attaching the tire constituent parts.
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、十分な径の拡縮が可能であり、ドラム幅拡大
時においてもドラム外周面に隙間が生じることのないド
ラムを提供することを目的としており、その特徴とする
ところは、ドラム本体に取付けられ、ドラムの半径方向
に移動可能な固定セグメントと、この固定セグメントに
固定された固定カバープレートと、前記固定セグメント
にドラムの軸方向に摺動可能に設けられた移動セグメン
トと、この移動セグメントと一体に移動する移動カバー
プレートと、を有するドラムにある。The present invention has been made in view of these conventional problems, and provides a drum whose diameter can be sufficiently expanded and contracted, and which does not create a gap on the outer peripheral surface of the drum even when the width of the drum is expanded. Its characteristics include: a fixed segment attached to the drum body and movable in the radial direction of the drum; a fixed cover plate fixed to this fixed segment; The drum has a movable segment slidable in the direction and a movable cover plate that moves together with the movable segment.
以下、この発明を図面に基づいて説明する。The present invention will be explained below based on the drawings.
第３〜６図は、この発明の一実施例を示している。まず
構成を説明すると、第３図＋８１、ｆｈ）および第４図
（ａｌ、（ｂｌにおいて、１５はドラム周方向に複数に
分割されたドラム本体部分である。3 to 6 show an embodiment of the present invention. First, the structure will be explained. In Fig. 3+81, fh) and Fig. 4 (al, bl), 15 is a drum body portion divided into a plurality of parts in the circumferential direction of the drum.
この本体部分１５は図示を省略した駆動機構に駆動され
てドラム軸回りに回転するとともに、それぞれが同期し
てドラム半径方向に移動し、ドラム径を拡縮させるよう
になっている。１６は各本体部分１５のドラム半径方向
外端に取付けられた固定セグメントであり、この固定セ
グメント１６のドラム半径方向外端面にはドラム外周面
を構成する固定カバープレー目７が固定されている。固
定カバープレー目７のドラム軸方向長さは固定セグメン
ト１６の軸方向長さと同一であり、両者の軸方向両端は
面一に揃えられている。一方、固定カバープレート１７
のドラム周方向の幅は、その一端がドラム最大拡径時に
おいても、図に示すように、隣接する固定カバープレー
ト１７上に到達する程固定セグメント１６のドラム周方
向の幅よりも十分に広くなっている。固定セグメント１
６のドラム軸方向両端部には、ガイド部材１８を介して
移動セグメン１−１９がドラム軸方向に摺動可能に設け
られている。移動セグメント１９のドラム半径方向外端
面には、固定カバープレート１７にドラム中心側から摺
接し、移動セグメント１９とともにドラム軸方向に移動
可能な移動カバープレート２０が固定されている。この
移動カバープレート２０ば、そのドラム周方向の幅が隣
接する固定セグメント１６の固定カバープレート１７上
に到達する程広くなっている。２１は前記固定セグメン
日６によって軸回り回転可能に支持され、ドラム軸方向
（第４図（ａｌ、（ｂｌの左右方向）に延在するねし軸
である。このねし軸２１は、その両端部において前記移
動セグメント１９に設けられたねじ孔２２とそれぞれ蝮
合するとともに、その中央部で図示しない回転駆動機構
に連結している。そして、この駆動機構によってねじ軸
２１が正逆回転されることにより、移動セグメント１９
および移動カバープレー）２０が摺動するようになって
いる。前記ドラム本体部分１５、固定セグメント１６、
固定カバープレート１７、ガイド部材１８、移動セグメ
ン１１９、移動カバープレー）２０、ねじ軸２１、図示
しない各駆動機構ば組合さり全体としてドラム２３を構
成している。The main body portion 15 is driven by a drive mechanism (not shown) to rotate around the drum axis, and each moves synchronously in the drum radial direction to expand or contract the drum diameter. A fixed segment 16 is attached to the outer end of each main body portion 15 in the radial direction of the drum, and a fixed cover plate 7 constituting the outer peripheral surface of the drum is fixed to the outer end surface of the fixed segment 16 in the radial direction of the drum. The length of the fixed cover plate 7 in the drum axial direction is the same as the axial length of the fixed segment 16, and both axial ends thereof are flush with each other. On the other hand, the fixed cover plate 17
The width in the circumferential direction of the drum is sufficiently wider than the width in the circumferential direction of the drum of the fixed segment 16 so that one end thereof reaches above the adjacent fixed cover plate 17 even when the drum is expanded to its maximum diameter. It has become. Fixed segment 1
Movable segments 1-19 are provided at both ends of drum 6 in the drum axial direction via guide members 18 so as to be slidable in the drum axial direction. A movable cover plate 20 is fixed to the outer end surface of the movable segment 19 in the drum radial direction, in sliding contact with the fixed cover plate 17 from the drum center side and movable together with the movable segment 19 in the drum axial direction. The width of the movable cover plate 20 in the drum circumferential direction is wide enough to reach above the fixed cover plate 17 of the adjacent fixed segment 16. Reference numeral 21 denotes a screw shaft that is rotatably supported by the fixed segment 6 and extends in the drum axial direction (left and right directions in FIGS. 4(al) and (bl). Both ends are engaged with screw holes 22 provided in the movable segment 19, and the center portion thereof is connected to a rotational drive mechanism (not shown).The screw shaft 21 is rotated in forward and reverse directions by this drive mechanism. By doing so, the moving segment 19
and a moving cover plate) 20 are adapted to slide. the drum body portion 15, the fixed segment 16,
The fixed cover plate 17, the guide member 18, the movable segment 119, the movable cover plate 20, the screw shaft 21, and each drive mechanism (not shown) collectively constitute the drum 23.
次に、作用を説明する。Next, the effect will be explained.
今、ドラム詔は縮径あるいは拡径されて所望の外径にな
っており、ドラム幅の最小の状態になっているものとす
る。そこで、ドラム幅を拡大する場合には、まず図示し
ない前記回転駆動機構を作動させてねじ軸２１を所定の
方向へ回転させる。その結果、固定セグメント１６の両
端部の移動セグメント１９および移動カバープレート２
０が、ドラム２３の軸方向両端から第４図（ｂｌに示す
ように突出し、移動カバープレート２０が固定カバープ
レート１７に連続した新たなドラム外周面を構成するた
め、ドラム幅は拡大する。ドラム幅の拡大量は、ねじ軸
２１の回転数によって調節することができる。なお、ド
ラム幅を拡大しても、移動カバープレート２０のドラム
周方向の幅が、前述したように、隣接する固定カバープ
レート１７上に到達する程広くなっているため、第６図
に示すように、ドラム外周面に間隙が生ずることはない
。ドラム幅を縮小する場合には、前記回転駆動機構を作
動させて、ねじ軸２１を前記と逆の方向へ回転させてや
ればよい。It is now assumed that the drum blade has been reduced or expanded in diameter to a desired outer diameter, and the drum width is at its minimum. Therefore, when expanding the drum width, first, the rotation drive mechanism (not shown) is operated to rotate the screw shaft 21 in a predetermined direction. As a result, the movable segment 19 at both ends of the fixed segment 16 and the movable cover plate 2
0 protrudes from both ends of the drum 23 in the axial direction as shown in FIG. The amount of width expansion can be adjusted by the number of rotations of the screw shaft 21. Note that even if the drum width is expanded, the width of the movable cover plate 20 in the drum circumferential direction will be larger than that of the adjacent fixed cover. Since it is wide enough to reach above the plate 17, there is no gap on the outer peripheral surface of the drum, as shown in FIG. 6. When reducing the width of the drum, operate the rotation drive mechanism, The screw shaft 21 may be rotated in the opposite direction to that described above.
以上説明してきたように、この発明によれば、ドラム本
体に固定され、ドラム外周面を構成する固定カバープレ
ートを備えた固定セグメントに、ドラム軸方向突出可能
に移動セグメントを設けるとともに、この移動セグメン
トに、隣接する移動セグメント迄到達する周方向の幅を
有する移動カバープレートを取付け、この移動カバープ
レートによって拡大した分のドラム外周面を構成させる
ようにしたため、ドラム幅拡大時のドラム外周面に隙間
が生ずることばな（、また、構造的にもドラム径の拡縮
を十分に行うことができる。As described above, according to the present invention, the fixed segment fixed to the drum body and provided with the fixed cover plate constituting the outer peripheral surface of the drum is provided with a movable segment capable of protruding in the axial direction of the drum, and the movable segment A movable cover plate having a width in the circumferential direction that reaches all the way to the adjacent movable segment is attached to the movable cover plate, and this movable cover plate forms the drum outer circumferential surface for the enlarged portion, so that there is no gap on the drum outer circumferential surface when the drum width is expanded. (Also, the drum diameter can be sufficiently expanded and contracted structurally.
第１図（ａｌは従来のタイヤ成形ドラムの外周部分の拡
径時および縮径時の状態を示す部分正面図、第１図（ｂ
ｌは第１図（ａｌのＢ−Ｂ矢視部分断面図、第２図（ａ
ｌは他の従来のタイヤ成形ドラムの外周部分の拡径時お
よび縮径時の状態を示す部分正面図、第２図Ｔｂｌは第
２図（ａｌのＢ−Ｂ矢視部分断面図、第２図（Ｃ１は第
２図（ａ）のＣ−Ｃ矢視図、第３図（ａ）はこの発明に
係るタイヤ成形ドラムの一実施例の外周部分の拡径時の
状態を示す部分正面図、第３図（ｂｌは第３図（ａｌの
部分拡大図、第４図（ａｌ、（ｂ）は第３図（ａｌのＩ
Ｖ−ＩＶ矢視部分断面図であり、第４図（ａｊはドラム
幅縮小時の状態、第４図（ｂＪはドラム幅拡大時の状態
、第５図は第３図＋ａ＋のタイヤ成形ドラムの外周部分
の縮径時の状態を示す部分正面図、第６図は第３図＋ａ
＋のタイヤ成形ドラムの外周部分のドラム幅拡大時の状
態を示す斜視図である。
１５−−−−−タイヤ成形ドラムの本体部分、１６−−
−−−−固定セグメント、
１７−−−−−−固定カバープレート、１９−一〜−−
−移動セグメント、
２０−−−−移動力バープレート、
２３−−−−−タイヤ成形ドラム。
代理人弁理士 有我軍一部
第１図
第２図Figure 1 (al is a partial front view showing the state of the outer circumferential portion of a conventional tire forming drum when the diameter is expanded and contracted; Figure 1 (b)
l is a partial sectional view taken along the line B-B in Fig. 1 (al), and Fig. 2 (a
1 is a partial front view showing the state of the outer peripheral portion of another conventional tire forming drum when the diameter is expanded and contracted; FIG. (C1 is a view taken along the line C-C in FIG. 2(a), and FIG. 3(a) is a partial front view showing the state of the outer peripheral portion of an embodiment of the tire forming drum according to the present invention when its diameter is expanded. , Fig. 3 (bl is a partial enlarged view of Fig. 3 (al), Fig. 4 (al), (b) is a partial enlarged view of Fig. 3 (al)
FIG. 4 (aj is the state when the drum width is reduced, FIG. 4 (bJ is the state when the drum width is expanded, and FIG. 5 is a partial cross-sectional view taken along the arrow V-IV). A partial front view showing the state of the outer circumference when the diameter is reduced, Figure 6 is Figure 3+a
FIG. 3 is a perspective view showing a state of the outer peripheral portion of the positive tire forming drum when the width of the drum is expanded. 15-----Main part of tire forming drum, 16--
---Fixed segment, 17-----Fixed cover plate, 19-1~--
- Moving segment, 20 ---- Moving force bar plate, 23 ---- Tire building drum. Representative Patent Attorney Agagun Part Figure 1 Figure 2
Claims (1)
の半径方向に移動可能な固定セグメントと、この固定セ
グメントに固定された固定カバープレートと、前記固定
セグメントにタイヤ成形ドラムの軸方向に摺動可能に設
けられた移動セグメントと、この移動セグメントと一体
に移動する移動カバープレートと、を有することを特徴
とするタイヤ成形ドラム。a fixed segment attached to the tire building drum body and movable in the radial direction of the tire building drum; a fixed cover plate fixed to the fixed segment; and a fixed segment provided on the fixed segment so as to be slidable in the axial direction of the tire building drum. 1. A tire building drum, comprising: a moving segment having a vertical axis; and a moving cover plate that moves integrally with the moving segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59054098A JPS60196330A (en) | 1984-03-19 | 1984-03-19 | Molding drum of tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59054098A JPS60196330A (en) | 1984-03-19 | 1984-03-19 | Molding drum of tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS60196330A true JPS60196330A (en) | 1985-10-04 |
Family
ID=12961142
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59054098A Pending JPS60196330A (en) | 1984-03-19 | 1984-03-19 | Molding drum of tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60196330A (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4923554A (en) * | 1987-08-20 | 1990-05-08 | Bridgestone Corporation | Forming drum for building a tire |
| US5203947A (en) * | 1991-10-07 | 1993-04-20 | Bridgestone Corporation | Radially expandable tire forming drum |
| EP1612033A1 (en) | 2004-06-30 | 2006-01-04 | The Goodyear Tire & Rubber Company | Segment cover plate for tire building drum |
| WO2007096629A1 (en) * | 2006-02-24 | 2007-08-30 | Wyko Tire Technology Limited | Expandable mandrel havin adjustable width |
| JP2009274392A (en) * | 2008-05-16 | 2009-11-26 | Sumitomo Rubber Ind Ltd | Molding drum of tire member |
| WO2013054051A1 (en) | 2011-10-14 | 2013-04-18 | Compagnie Generale Des Etablissements Michelin | Tyre-building drum comprising mobile sectors |
| WO2014097016A1 (en) * | 2012-12-20 | 2014-06-26 | Pirelli Tyre S.P.A. | A method for controlling the geometry of green tyres different from each other and a process for manufacturing tyres different form each other |
| JP2017518209A (en) * | 2014-06-20 | 2017-07-06 | ヴェーエムイー ホーランド ベー． ヴェー．Ｖｍｉ Ｈｏｌｌａｎｄ Ｂ． Ｖ． | Tire molding drum |
| EP3102399A4 (en) * | 2014-02-07 | 2017-09-13 | Davian Enterprises, LLC | Expandable belt and tread drum with varied curvature segments |
| US11548251B2 (en) | 2019-01-28 | 2023-01-10 | Davian Enterprises, LLC | Expandable belt and tread drum with reverse offset fingers |
| US11993043B2 (en) | 2020-12-03 | 2024-05-28 | Davian Enterprises, LLC | Expandable belt and tread drum with magnetic deck fixing |
| US12083761B2 (en) | 2020-04-22 | 2024-09-10 | Davian Enterprises, LLC | Shoulder assembly for tire building machine |
| US12162234B2 (en) | 2020-05-29 | 2024-12-10 | Davian Enterprises, LLC | Transfer ring shoe and transfer ring with reduced air entrapment features |
-
1984
- 1984-03-19 JP JP59054098A patent/JPS60196330A/en active Pending
Cited By (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4923554A (en) * | 1987-08-20 | 1990-05-08 | Bridgestone Corporation | Forming drum for building a tire |
| US5203947A (en) * | 1991-10-07 | 1993-04-20 | Bridgestone Corporation | Radially expandable tire forming drum |
| EP1612033A1 (en) | 2004-06-30 | 2006-01-04 | The Goodyear Tire & Rubber Company | Segment cover plate for tire building drum |
| WO2007096629A1 (en) * | 2006-02-24 | 2007-08-30 | Wyko Tire Technology Limited | Expandable mandrel havin adjustable width |
| US8272417B2 (en) | 2006-02-24 | 2012-09-25 | Wyko Tire Technology Limited | Expandable mandrel having adjustable width |
| JP2009274392A (en) * | 2008-05-16 | 2009-11-26 | Sumitomo Rubber Ind Ltd | Molding drum of tire member |
| WO2013054051A1 (en) | 2011-10-14 | 2013-04-18 | Compagnie Generale Des Etablissements Michelin | Tyre-building drum comprising mobile sectors |
| CN104853906A (en) * | 2012-12-20 | 2015-08-19 | 倍耐力轮胎股份公司 | A method for controlling the geometry of green tyres different from each other and a process for manufacturing tyres different form each other |
| WO2014097016A1 (en) * | 2012-12-20 | 2014-06-26 | Pirelli Tyre S.P.A. | A method for controlling the geometry of green tyres different from each other and a process for manufacturing tyres different form each other |
| EP3102399A4 (en) * | 2014-02-07 | 2017-09-13 | Davian Enterprises, LLC | Expandable belt and tread drum with varied curvature segments |
| US10040262B2 (en) | 2014-02-07 | 2018-08-07 | Davian Enterprises, LLC | Expandable belt and tread drum with varied curvature segments |
| JP2017518209A (en) * | 2014-06-20 | 2017-07-06 | ヴェーエムイー ホーランド ベー． ヴェー．Ｖｍｉ Ｈｏｌｌａｎｄ Ｂ． Ｖ． | Tire molding drum |
| US10434737B2 (en) | 2014-06-20 | 2019-10-08 | Vmi Holland B.V. | Tire building drum |
| US11548251B2 (en) | 2019-01-28 | 2023-01-10 | Davian Enterprises, LLC | Expandable belt and tread drum with reverse offset fingers |
| US12083761B2 (en) | 2020-04-22 | 2024-09-10 | Davian Enterprises, LLC | Shoulder assembly for tire building machine |
| US12162234B2 (en) | 2020-05-29 | 2024-12-10 | Davian Enterprises, LLC | Transfer ring shoe and transfer ring with reduced air entrapment features |
| US11993043B2 (en) | 2020-12-03 | 2024-05-28 | Davian Enterprises, LLC | Expandable belt and tread drum with magnetic deck fixing |
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