WO2012153574A1 - 剛性中子の保持構造 - Google Patents
剛性中子の保持構造 Download PDFInfo
- Publication number
- WO2012153574A1 WO2012153574A1 PCT/JP2012/058290 JP2012058290W WO2012153574A1 WO 2012153574 A1 WO2012153574 A1 WO 2012153574A1 JP 2012058290 W JP2012058290 W JP 2012058290W WO 2012153574 A1 WO2012153574 A1 WO 2012153574A1
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- WIPO (PCT)
- Prior art keywords
- core
- rigid
- shaft portion
- holding
- axial direction
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Classifications
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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
- B29D30/10—Building tyres on round cores, i.e. the shape of the core is approximately identical with the shape of the completed tyre
- B29D30/12—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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0661—Rigid cores therefor, e.g. annular or substantially toroidal cores
Definitions
- the present invention relates to a rigid core holding structure capable of efficiently transferring a rigid core between a plurality of devices.
- tire components such as an inner liner, carcass ply, belt ply, sidewall rubber, and tread rubber on a rigid core a having an outer shape that approximates the inner shape of the finished tire.
- a rigid core a having an outer shape that approximates the inner shape of the finished tire.
- the rigid core a is, for example, an inner liner attaching device, a carcass ply attaching device, a belt ply attaching device, a sidewall rubber attaching device, a tread rubber attaching device, a vulcanizing device, and the like. It is necessary to sequentially transfer between a plurality of devices and perform a pasting operation of each tire constituent member.
- the rigid core a needs to be easily removed after being vulcanized and disassembled from the lumen of the pneumatic tire. Therefore, as shown in FIG. 7B, the core body a1 of the rigid core a is formed from a plurality of core segments c that are divided in the tire circumferential direction.
- the core segment c has a plurality of first core segments c1 whose dividing surfaces at both ends in the circumferential direction are inclined in a direction in which the circumferential width decreases toward the inside in the radial direction, and dividing surfaces at both ends in the circumferential direction are And a plurality of second core segments c2 inclined in the direction of increasing circumferential width toward the inside in the radial direction.
- the first core segment c1 and the second core segment c2 are alternately arranged in the circumferential direction.
- Such a rigid core a can be removed from the vulcanized tire by sequentially moving the second core segment c2 and the first core segment 9A radially inward.
- each core segment c has its radially inner end fixed to the annular core portion d1 of the frame d with a bolt e and assembled in an annular shape.
- the frame d is provided with an opening f on one end side in the axial direction of the core part d1, and the bolt e can be attached and detached from the opening f.
- such a rigid core a can be provided with a support shaft portion g for supporting the rigid core a only on one side of the other end side in the axial direction of the frame d.
- the delivery operation of the rigid core “a” becomes complicated, and the attachment accuracy of the rigid core “a” and the work efficiency are significantly reduced.
- Patent Document 2 proposes a tire-forming drum connecting structure that shortens the time for exchanging the tire-forming drum and improves the efficiency of the tire manufacturing operation.
- a structure for connecting the tire-forming drum is complicated, and the amount of protrusion of the support shaft portion g is large, so that there is a problem that the handling property of the rigid core a is inferior.
- an object of the present invention is to provide a rigid core holding structure capable of accurately and efficiently performing a rigid core transfer operation between apparatuses while simplifying and miniaturizing the holding structure.
- the invention of claim 1 of the present application provides a rigid core having an annular core body provided with a molding surface on the outer surface for molding a lumen surface of a pneumatic tire.
- a holding structure for a rigid core that is held so as to be able to pass between a holding shaft portion of the device and a holding shaft portion of the second device, the rigid core being divided in the tire circumferential direction and radially
- the core body composed of a plurality of core segments movable inward, and a cylindrical core that is inserted into a central hole of the core body to prevent the core segments from moving radially inward;
- a pair of side plates disposed on both sides of the core body in the axial direction, and holding the core body between the inner side surfaces to prevent movement of each core segment in the axial direction; and Provided on the outer surface of each side plate is a support shaft that protrudes outward in the axial direction.
- said support shaft portion and the holding shaft portion is characterized in that the detachable by connecting means having a ball
- the connecting means includes a connecting hole portion concentrically recessed at an outer end portion of the support shaft portion and provided with a circumferential groove on an inner peripheral surface, and an outer end portion of the holding shaft portion.
- a connecting cylinder portion projecting concentrically and inserted into the connecting hole portion, and ball lock means for locking between the connecting hole portion and the connecting cylinder portion; and
- a rigid ball held in a plurality of through holes that are distributed in the circumferential direction and penetrate inward and outward in the radial direction, and housed in a cylinder chamber provided in the holding shaft portion, and supply and discharge of compressed air to and from the cylinder chamber
- a piston piece that can move in and out in the axial direction in the cylinder chamber, and a plunger that is arranged in a central hole of the connecting cylinder part and is connected to the piston piece so as to be movable together.
- Each rigid ball is pushed up in the radial direction by moving to one side in the axial direction within the central hole of the connecting cylinder part, and each rigid ball is pressed against the circumferential groove to be locked, and the piston piece is used for the connection.
- the piston piece is used for the connection.
- the core segment has a large width in the circumferential direction, and the split surfaces at both ends in the circumferential direction are inclined in such a direction that the circumferential width decreases toward the inside in the radial direction.
- the child segments and the first core segments are alternately arranged in the circumferential direction, and the circumferential width is small, and the circumferential width is increased inward in the radially inward direction on the divided surfaces at both circumferential ends. It is characterized by being configured to be movable inward in the radial direction by being composed of the second core segment inclined to the center.
- the rigid core of the present invention protrudes the support shaft portion on both sides in the axial direction, the other support shaft portion is held by the other device while holding one support shaft portion. It is possible to improve the working efficiency of delivering the rigid core.
- a ball lock mechanism is employed as the connection means between the support shaft portion and the holding shaft portion, one-touch attachment / detachment is possible, and connection accuracy and connection efficiency can be improved.
- connection means can simplify the structure by adopting a ball lock mechanism, and can suppress the protruding amount of the support shaft portion low.
- Such a reduction in the protruding amount of the support shaft portion is useful for improving the handleability of the rigid core of the present invention in which the support shaft portion protrudes on both axial sides.
- the rigid core holding structure (hereinafter referred to as “holding structure”) of the present embodiment includes a rigid core 1, a holding shaft portion 51 ⁇ / b> A of the first device 50 ⁇ / b> A, and a second device.
- This is a holding structure that holds the shaft 50B so that it can be transferred to and from the holding shaft portion 51B.
- This holding structure is provided with support shaft portions 12 and 12 projecting outward in the axial direction of the rigid core 1, and each of the support shaft portions 12 and 12 and the holding shaft portions 51A and 51B are ball-locked.
- the connecting means 24 having a mechanism is detachable.
- one of the first and second devices 50A and 50B is selected from, for example, an inner liner application device, a carcass ply application device, a belt ply application device, a sidewall rubber application device, a tread rubber application device, and the like.
- the case is a tire forming device, and the other is a transfer device that sequentially transfers the rigid core 1 received from the selected tire forming device to other tire forming devices.
- a plurality of tire constituent members can be sequentially attached to the rigid core 1 to form a raw tire.
- 1st, 2nd apparatus 50A, 50B it is not limited to said apparatus, For example, various apparatuses, such as a tire vulcanizing apparatus and an inspection apparatus, are applicable.
- the rigid core 1 is inserted into an annular core body 3 provided on the outer surface with a molding surface 2 for molding the lumen surface Ts of the pneumatic tire T, and a center hole 3H of the core body 3.
- a cylindrical core 5 and a pair of side plates 6F and 6R arranged on both sides in the axial direction of the core body 3 are provided.
- the support shaft portions 12 and 12 projecting outward in the axial direction are provided on the outer surfaces of the side plates 6F and 6R.
- the core body 3 is provided with a main portion 3A having the molding surface 2 and a bulging portion 3B that bulges outward in the axial direction inside the main portion 3A in the radial direction.
- the outer surface in the radial direction of the bulging portion 3B has a tapered surface 7 that is inclined outward in the axial direction toward the inner side in the radial direction.
- a recess 8 concentric with the core body 3 is formed inside the core body 3.
- steam which is a heat medium for vulcanization heating
- a flow path (not shown) provided in the core 5.
- a heat source for vulcanization heating such as an electric heater can be accommodated in the recess 8.
- the core body 3 is composed of a plurality of core segments 9 divided in the tire circumferential direction.
- the core segment 9 includes a plurality of first core segments 9A in which split surfaces 9S at both ends in the circumferential direction are inclined in a direction in which the circumferential width decreases toward the inside in the radial direction, and split surfaces at both ends in the circumferential direction.
- 9S is comprised from the several 2nd core segment 9B inclined in the direction which the circumferential direction width
- the first core segment 9A and the second core segment 9B are alternately arranged in the circumferential direction.
- the core segment 9 sequentially moves the second core segment 9B and the first core segment 9A radially inward to take out the core main body 3 from the lumen TH of the tire T. Can do.
- the core 5 has a cylindrical shape and is inserted into the center hole 3H of the core body 3. As a result, the core 5 can prevent the core segments 9 from moving inward in the radial direction. Further, an inner screw portion 13 is provided in the center hole 5H of the core 5 on the other side in the axial direction.
- a first dovetail portion 16 formed of one of the dovetail groove 14 or the dovetail tenon 15 (the dovetail groove 14 in the present embodiment) continuously extending in the axial direction is formed on the outer peripheral surface of the core 5.
- the other of the dovetail groove 14 or the dovetail tenon 15 extending in the axial direction and engaging with the first dovetail joint portion 16 (in this embodiment, the dovetail tenon 15 ) Is formed.
- the dovetail groove 14 and the ant tenon 15 have a substantially trapezoidal cross section in which both side surfaces are inclined in the direction of increasing the width toward the groove bottom and tenon tip, as is well known. .
- the dovetail groove 14 and the ant tenon 15 are connected to each other so as to be movable relative to each other only in the axial direction by fitting each other.
- a dovetail groove 14 is formed as the first dovetail joint 16 and an ant tenon 15 is formed as the second dovetail joint 17, but conversely, the first dovetail joint 16
- the ant tenon 15 may be formed, and the ant groove 14 may be formed as the second ant joint 17.
- the side plate 6 ⁇ / b> F disposed on one side in the axial direction is fixed to the end portion on one side in the axial direction of the core 5.
- the one side plate 6F includes a side plate main body 11 including a disc-shaped substrate portion 11A and a flange portion 11B which is provided at the outer circumferential edge of the substrate plate and contacts the tapered surface 7 of the core main body 3.
- the support shaft portion 12 that protrudes outward in the axial direction is provided concentrically on the outer surface in the axial direction on the substrate portion 11A.
- the flange portion 11B has the same inclination as the tapered surface 7. Such a flange portion 11B can align the side plate 6F and the core body 3 concentrically, and sandwich and hold the bulging portion 3B of the core body 3 between the flange portion 11B and the core 5. sell.
- the bolt 10 is used to fix the side plate 6F on one side and the core 5 is exemplified, but it can also be fixed by welding or the like, for example.
- the core 5 integrated with the side plate 6F on one side is extracted from the center hole 3H of the core body 3 in the axial direction.
- the child segment 9 can be moved radially inward. For this reason, it is not necessary to disassemble the side plate 6F and the core 5 on one side. Therefore, the fixing between the core 5 and the side plate 6F has no influence on the disassembling and assembling work of the rigid core.
- the side plate 6R on the other side in the axial direction is a side plate including a disc-shaped substrate portion 20A and a flange portion 20B that is provided on the outer peripheral edge of the disc portion and abuts against the tapered surface 7 of the core body 3.
- a body 20 is provided.
- the substrate portion 20A is provided with a support shaft portion 12 concentrically provided on the outer surface in the axial direction on the outer side in the axial direction. Further, a boss portion 22 that can be screwed into the inner screw portion 13 of the core 5 is provided concentrically on the inner side surface of the substrate portion 20A. Therefore, the other side plate 6R can be detachably attached to the core 5 by screwing the boss portion 22 and the inner screw portion 13 together.
- the flange portion 20B can align the side plate 6R and the core body 3 concentrically, The bulging portion 3B of the core body 3 can be sandwiched and held between the flange portion 20B and the core 5.
- the first and second dovetail portions 16 and 17 are formed in the core 5 and the core segments 9, respectively, as described above, The child segments 9 can be sequentially arranged around the core while being guided by the first dovetail joint 16.
- the first and second dovetail joint portions 16 and 17 are engaged with each other, positional displacement of the core segment 9 can be prevented and high-precision and stable assembly can be achieved.
- the boss portion 22 that can be screwed to the core 5 protrudes from the other side plate 6R, the core body 3 is narrowed between the side plates 6F and 6R by the screwing of the boss portion 22. Thus, the movement of each core segment 9 in the axial direction can be prevented.
- the rigid core 1 of the present embodiment includes the engagement between the first and second dovetail joint portions 16 and 17, the prevention of the movement of the core segment 9 in the radial direction by the core 5, and the side plate.
- the rigid core 1 of the present embodiment is fixed by only one screwed connection between the side plate 6R and the core 5 without using bolts or the like, the assembly work efficiency and the disassembly work efficiency are greatly increased. And can greatly contribute to the automation of these operations.
- the side plate 6R and the core 5 can also be detachably connected using bolts or the like.
- the support shaft portions 12 and 12 on both sides and the holding shaft portions 51A and 51B of the first and second devices 50A and 50B (hereinafter, the holding shaft portions 51A and 51B are collectively referred to as “ The holding shaft portion 51 ”) is configured to be detachable by the connecting means 24 having a ball lock mechanism.
- the connecting means 24 of the present embodiment protrudes concentrically to the outer end portion of the holding shaft portion 51 and the connecting hole portion 26 concentrically recessed at the outer end portion of the support shaft portion 12.
- a connecting cylinder part 27 is provided, and ball locking means 28 for locking between the connecting hole part 26 and the connecting cylinder part 27 is provided.
- the connecting hole portion 26 is provided with a circumferential groove 26A on the inner peripheral surface thereof. Further, the connecting cylinder portion 27 is provided with a plurality of through holes 29 that are distributed in the circumferential direction and penetrate inward and outward in the radial direction.
- the ball lock means 28 includes a rigid ball 30 held in the through hole 29 of the connecting cylinder part 27, a piston piece 33 housed in a cylinder chamber 31 in the holding shaft part 51, and the connecting cylinder part 27. And a plunger 34 disposed in the central hole 27H.
- the piston piece 33 can move in and out of the axial direction in the cylinder chamber 31 by supplying and discharging compressed air to and from the cylinder chamber 31.
- the plunger 34 is integrally connected to the piston piece 33. Thereby, the plunger 34 can move in and out in the axial direction within the center hole 27 ⁇ / b> H of the connecting cylinder portion 27 by the movement of the piston piece 33 in and out in the axial direction.
- the outer peripheral surface of the plunger 34 has a cone surface that is tapered outward in the axial direction.
- Such a plunger 34 is capable of pushing up each of the rigid balls 30 radially outward by the outer peripheral surface thereof coming into contact with each of the rigid balls 30 by moving outward in the axial direction. Thereby, each rigid ball 30 is pressed into the circumferential groove 26 ⁇ / b> A, and the space between the connecting hole portion 26 and the connecting cylindrical portion 27 can be locked.
- the plunger 34 can release the rigid ball 30 from being pushed upward in the radial direction by moving inward in the axial direction, and can release the lock between the connecting hole portion 26 and the connecting cylindrical portion 27. .
- a locking portion 36 (shown in FIG. 3) formed of one of a key groove for rotation prevention or a key-like protrusion is formed on the outer end surfaces of the support shaft portions 12 and 12.
- an engagement portion (not shown) is formed which is made of the other of the key groove or the key-like protrusion and engages with the locking portion 36.
- the rigid core 1 of the present embodiment has the support shaft portions 12 and 12 projecting on both sides in the axial direction, and therefore, as shown schematically in FIG.
- the other support shaft portion 12 is connected to the holding shaft portion 51B of the other device 50B (for example, the second device 50B) while being connected to the holding shaft portion 51A of the device 50A (for example, the first device 50A). it can. Therefore, in this invention, the delivery operation
- the ball locking mechanism is adopted for the connecting means 24, it is possible to attach and detach the support shaft portion 12 and the holding shaft portions 51A and 51B at the time of delivery with one touch, and to improve the connection accuracy and the connection efficiency. Can be increased. Furthermore, since the rigid core 1 can simplify the structure of the connecting means 24 by adopting the ball lock mechanism and can suppress the protruding amount of the support shaft portion 12, the rigid core 1 can be made compact. be able to.
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Tyre Moulding (AREA)
- Tires In General (AREA)
Abstract
Description
2 成形面
3 中子本体
3H 中心孔
5 コア
5H 中心孔
6F、6R 側板
9 中子セグメント
9A 第1の中子セグメント
9B 第2の中子セグメント
9S 分割面
12 支持軸部
T 空気入りタイヤ
Ts 内腔面
図1に示すように、本実施形態の剛性中子の保持構造(以下、「保持構造」という)は、剛性中子1を、第1の装置50Aの保持軸部51Aと、第2の装置50Bの保持軸部51Bとの間で受け渡し可能に保持させる保持構造である。この保持構造は、剛性中子1の軸心方向両外側に突出する支持軸部12、12が設けられるとともに、各前記支持軸部12、12と前記保持軸部51A、51Bとを、ボールロック機構を有する連結手段24によって着脱自在に構成している。
Claims (3)
- 空気入りタイヤの内腔面を成形する成形面を外表面に設けた円環状の中子本体を具える剛性中子を、第1の装置の保持軸部と、第2の装置の保持軸部との間で受け渡し可能に保持させる剛性中子の保持構造であって、
前記剛性中子は、
タイヤ周方向に分割されかつ半径方向内側に移動可能な複数の中子セグメントからなる前記中子本体と、
前記中子本体の中心孔に内挿されて各中子セグメントの半径方向内側への移動を阻止する円筒状のコアと、
前記中子本体の軸心方向両側に配され、内側面間で前記中子本体を挟んで保持することにより各中子セグメントの軸心方向への移動を阻止する一対の側板とを具え、
かつ各側板の外側面に、軸心方向外側に突出する支持軸部を設けるとともに、
前記支持軸部と前記保持軸部とを、ボールロック機構を有する連結手段により着脱自在としたことを特徴とする剛性中子の保持構造。 - 前記連結手段は、前記支持軸部の外端部に同心に凹設されかつ内周面に周溝を設けた連結孔部、前記保持軸部の外端部に同心に突設されかつ前記連結孔部に挿入される連結筒部、および前記連結孔部と連結筒部との間をロックするボールロック手段を具えるとともに、
前記ボールロック手段は、
前記連結筒部に周方向に分散配置されかつ半径方向内外に貫通する複数の貫通孔に保持される剛性ボールと、
前記保持軸部内に設けるシリンダ室内に収納され、かつこのシリンダ室への圧縮空気の給排によって前記シリンダ室内で軸心方向内外に移動しうるピストン片と、
前記連結筒部の中心孔内に配され、かつ前記ピストン片と一体移動可能に連結されるプランジャとを具え、
前記プランジャは、前記ピストン片により前記連結筒部の中心孔内で軸心方向一方側に移動することにより各前記剛性ボールを半径方向外側に押し上げ、各剛性ボールを前記周溝に押し付けてロックさせるとともに、前記ピストン片により前記連結筒部の中心孔内で軸心方向他方側に移動することにより前記剛性ボールの半径方向外側への押し上げを解除させて前記連結孔部と連結筒部との間のロックを解除させることを特徴とする請求項1記載の剛性中子の保持構造。 - 前記中子セグメントは、周方向巾が大、かつ周方向両端の分割面を、半径方向内方に向かって周方向巾が減じる向きに傾斜させた第1の中子セグメントと、前記第1の中子セグメントとは周方向に交互に配され、しかも周方向巾が小、かつ周方向両端の分割面を、半径方向内方に向かって周方向巾が増す向きに傾斜させた第2の中子セグメントとから構成されることにより、半径方向内側に移動可能としたことを特徴とする請求項1記載の剛性中子の保持構造。
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BR112013028896-5A BR112013028896B1 (pt) | 2011-05-12 | 2012-03-29 | Estrutura de sustentação de núcleo rígido |
CN201280022928.9A CN103517800B (zh) | 2011-05-12 | 2012-03-29 | 刚性芯保持结构 |
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JP2011-107471 | 2011-05-12 | ||
JP2011107471A JP5364124B2 (ja) | 2011-05-12 | 2011-05-12 | 剛性中子の保持構造 |
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KR101658819B1 (ko) * | 2014-11-13 | 2016-10-04 | 한국타이어 주식회사 | 타이어 성형드럼과 성형드럼 조립 분해장치 |
JP6694267B2 (ja) * | 2015-12-22 | 2020-05-13 | 株式会社ブリヂストン | タイヤ製造装置 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005188670A (ja) * | 2003-12-26 | 2005-07-14 | Nabeya Iron & Tool Works Ltd | 締結装置 |
JP2006224377A (ja) * | 2005-02-16 | 2006-08-31 | Yokohama Rubber Co Ltd:The | 空気入りタイヤの製造方法 |
JP2007098802A (ja) * | 2005-10-05 | 2007-04-19 | Ichimaru Giken:Kk | タイヤ加硫装置 |
JP2007152957A (ja) * | 2005-12-02 | 2007-06-21 | Goodyear Tire & Rubber Co:The | タイヤ製造用コアのラッチ機構および移動機構 |
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JP3770705B2 (ja) * | 1997-07-22 | 2006-04-26 | 株式会社ブリヂストン | タイヤ製造用内型 |
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- 2012-03-29 WO PCT/JP2012/058290 patent/WO2012153574A1/ja active Application Filing
- 2012-03-29 CN CN201280022928.9A patent/CN103517800B/zh active Active
- 2012-03-29 BR BR112013028896-5A patent/BR112013028896B1/pt active IP Right Grant
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2005188670A (ja) * | 2003-12-26 | 2005-07-14 | Nabeya Iron & Tool Works Ltd | 締結装置 |
JP2006224377A (ja) * | 2005-02-16 | 2006-08-31 | Yokohama Rubber Co Ltd:The | 空気入りタイヤの製造方法 |
JP2007098802A (ja) * | 2005-10-05 | 2007-04-19 | Ichimaru Giken:Kk | タイヤ加硫装置 |
JP2007152957A (ja) * | 2005-12-02 | 2007-06-21 | Goodyear Tire & Rubber Co:The | タイヤ製造用コアのラッチ機構および移動機構 |
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CN103517800A (zh) | 2014-01-15 |
BR112013028896A2 (pt) | 2017-01-31 |
JP5364124B2 (ja) | 2013-12-11 |
BR112013028896B1 (pt) | 2020-12-22 |
JP2012236361A (ja) | 2012-12-06 |
CN103517800B (zh) | 2016-06-01 |
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