WO2013047422A1 - タイヤ加硫用ブラダおよびタイヤ加硫装置 - Google Patents
タイヤ加硫用ブラダおよびタイヤ加硫装置 Download PDFInfo
- Publication number
- WO2013047422A1 WO2013047422A1 PCT/JP2012/074365 JP2012074365W WO2013047422A1 WO 2013047422 A1 WO2013047422 A1 WO 2013047422A1 JP 2012074365 W JP2012074365 W JP 2012074365W WO 2013047422 A1 WO2013047422 A1 WO 2013047422A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- bladder
- heat medium
- tire
- serving
- medium
- Prior art date
Links
Images
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)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0654—Flexible cores therefor, e.g. bladders, bags, membranes, diaphragms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/32—Component parts, details or accessories; Auxiliary operations
- B29C43/36—Moulds for making articles of definite length, i.e. discrete articles
- B29C43/3642—Bags, bleeder sheets or cauls for isostatic pressing
- B29C2043/3649—Inflatable bladders using gas or fluid and related details
-
- 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
- B29D30/0654—Flexible cores therefor, e.g. bladders, bags, membranes, diaphragms
- B29D2030/0655—Constructional or chemical features of the flexible 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
- B29D30/0654—Flexible cores therefor, e.g. bladders, bags, membranes, diaphragms
- B29D2030/0659—Details or accessories for the flexible cores not otherwise provided for
Definitions
- the hot water that contacts the bladder inner wall is deprived of heat and the temperature drops. Along with this, the density increases, moves downward as a cold water mass, and stays at almost the same temperature. Therefore, a vertical temperature difference is generated inside the bladder, and accordingly, a temperature difference is also generated on the outer surface of the bladder in contact with the green tire.
- the maximum temperature difference between the vulcanization temperatures may be about 50 ° C.
- An object of the present invention is to provide a bladder for tire vulcanization and a tire vulcanizing apparatus capable of greatly reducing a temperature difference of a bladder when vulcanizing a green tire by hot water vulcanization or gas vulcanization. is there.
- a tire vulcanizing bladder according to the present invention has a protruding portion extending in an inclined or continuous state inclined obliquely with respect to the circumferential direction on an inner wall surface of a cylindrical bladder.
- hot water serving as a heat medium and a pressure medium, or water vapor serving as a heat medium and gas serving as a pressure medium are filled therein during vulcanization of the green tire.
- a tire vulcanizing apparatus includes the above-described bladder for tire vulcanization and a central mechanism having a bead holding portion for holding an upper bead portion and a lower bead portion of the bladder.
- a water outlet serving as a medium and a discharge port through which gas serving as a pressurized medium is discharged to the outside of the bladder are provided.
- the inner wall surface of the cylindrical bladder is provided with a protruding portion extending obliquely or intermittently inclined with respect to the circumferential direction thereof, and therefore, during green tire vulcanization.
- the circumference of the annular bladder is guided along the protrusion. It flows in the direction and turns and flows in the vertical direction of the bladder.
- the annular flow of the heat medium in the circumferential direction of the bladder and the swirling flow in the vertical direction of the bladder act synergistically, so that the heat medium is stirred and the temperature difference of the bladder can be sufficiently reduced.
- Specs that extend in a state where the protrusions are intermittent are advantageous in suppressing an excessive increase in rigidity of the bladder due to the provision of the protrusions. Therefore, a decrease in the expansion / contraction property of the bladder can be suppressed.
- a swirling flow of the heat medium in the vertical direction of the bladder is likely to occur, which is further advantageous in reducing the temperature difference of the bladder.
- a specification in which a plurality of at least one of the injection nozzle and the discharge port are provided may be employed.
- Warm water serving as a heat medium and a pressure medium from the injection nozzle, or an injection pressure for injecting water vapor serving as a heat medium and a gas serving as a pressure medium is hot water serving as a heat medium and a pressure medium from the discharge port, or
- the specification can be set to 200 kPa to 500 kPa higher than the discharge pressure for discharging the water vapor as the heat medium and the gas as the pressure medium. According to these specifications, the heat medium can easily flow smoothly inside the bladder, which is advantageous for reducing the temperature difference of the bladder.
- the injection direction of the injection nozzle may be set to be a tangential direction of the expanded annular bladder in plan view. According to this specification, it becomes easy to relieve the impact on the inner wall surface of the bladder due to the heat medium or pressure medium injected into the bladder. Therefore, it is easy to suppress the thinning and deterioration due to the phenomenon that the inner wall surface of the bladder is eroded by the mechanical action of the heat medium (erosion) and the phenomenon of erosion by the chemical action (corrosion). Along with this, it is possible to extend the useful life of the bladder.
- Control valves 7a and 8a are installed on the injection line connected to the injection nozzle 7 and the discharge line connected to the discharge port 8, respectively. By controlling the opening and closing of the control valves 7a and 8a, the heat medium H is injected and discharged.
- the green tire G is disposed inside the molds 9a, 9b, 9c and 9d (hereinafter, collectively referred to as the mold 9 when referring to the mold), and a rubber cylindrical bladder 2 is provided inside the green tire G. Be placed. Therefore, the injection nozzle 7 and the discharge port 8 are arranged on the inner peripheral side of the bladder 2.
- the heat medium H is injected and filled in the bladder 2 and expands annularly along the inner wall surface of the green tire G to press the inner peripheral surface of the green tire G While heating. Hot water is used as the heat medium H (and the pressure medium).
- the mold 9 includes an upper mold 9a, a lower mold 9b, an annular upper plate 9c, and an annular lower plate 9d.
- the bladder 2 is provided with a protruding portion 4 on the inner wall surface thereof that extends in an obliquely inclined manner with respect to the horizontally extending circumferential direction.
- the projecting portion 4 that is inclined upward with respect to the horizontal direction in which the heat medium H is injected in a side view from the annular center position of the bladder 2 extends. That is, in this embodiment, the protrusion 4 is intermittently formed spirally in the right screw direction on the inner wall surface of the annular bladder 2 with respect to the traveling direction of the heat medium H.
- the length of the projecting portions 4 in the extending direction is, for example, about 50 mm to 100 mm, and the interval between the projecting portions 4 adjacent to the extending direction is about 50 mm to 100 mm.
- the heat medium H is injected and filled into the bladder 2 disposed inside the green tire G with the mold 9 closed.
- the bladder 2 is expanded.
- the temperature of the heat medium H is about 120 ° C. to 180 ° C.
- the inflated bladder 2 presses the inner peripheral surface of the green tire G and heats the green tire G while pressing it against the mold 9.
- the green tire G is pressed at a predetermined pressure and heated to a predetermined temperature, so that the heat medium H is discharged from the discharge port 8 while being injected from the injection nozzle 7 into the bladder 2.
- the projecting portion 4 is provided on the inner wall surface of the annular bladder 2 so as to be inclined and intermittently inclined with respect to the circumferential direction.
- the heat medium H is guided along the projecting portion 4 and flows in the circumferential direction of the annular bladder 2 as illustrated in FIG. 4, and swirls in the vertical direction of the bladder 2 as illustrated in FIG. Fluid.
- the annular flow of the heat medium H in the circumferential direction of the bladder and the swirling flow in the vertical direction of the bladder are generated, and the circular flow and the swirling flow act synergistically, so that the heat medium H inside the bladder 2 is sufficient.
- the temperature difference in the vertical direction and the temperature difference in the circumferential direction of the bladder 2 can be made sufficiently small, and the entire bladder 2 can be brought to a substantially uniform temperature.
- the inclination angle A of the protrusion 4 with respect to the circumferential direction of the bladder is set, for example, within a range of minus 30 ° to plus 30 ° (excluding 0 °).
- the positive inclination angle A and the negative inclination angle A are inclination angles in the case where the protrusion 4 is formed in the left screw direction and in the right screw direction, respectively.
- the heat medium H injected from the injection nozzle 7 into the bladder 2 is brought into contact with the inner wall surface of the bladder 2 to decrease in temperature and increase in density, a force to move downward acts on the heat medium H. To do. Therefore, as in this embodiment, when the protrusion 4 is extended at a negative inclination angle A, the injected heat medium H is guided to the protrusion 4 and easily flows. Along with this, a swirl flow tends to occur in the right-handed direction in which the heat medium H swirls downward from above in the longitudinal section of the bladder 2, which is advantageous in reducing the temperature difference of the bladder 2. Therefore, the inclination angle A of the protrusion 4 is more preferably set to minus 15 ° to minus 5 °.
- the protrusion 4 is preferably formed in the right screw direction rather than the left screw direction.
- the relationship between the right screw and the left screw is reversed even in the same protruding portion 4, and therefore the discrimination of the right screw and the left screw is determined based on the direction of the circular flow of the heat medium H. It is good to prescribe
- the thickness t of the protrusion 4 is set to be equal to or less than the thickness T (about 10 mm) of the bladder 2 when expanded, for example.
- the lower limit of the thickness t is about 3 mm. If the thickness t of the protrusion 4 is excessive, the thermal conductivity of that portion is locally reduced. Further, the rigidity of the bladder 2 at that portion is locally increased, and the bladder 2 is difficult to expand, which adversely affects the expansion / contraction property. Therefore, by making the thickness t of the projecting portion 4 equal to or less than the thickness T, it is possible to sufficiently suppress the decrease in thermal conductivity and the decrease in expansion / contraction property of the bladder 2.
- the height h of the protrusion 4 is preferably set in a range of 3 to 5 times its thickness t, for example.
- the injection amount and the discharge amount of the heat medium H are equivalent.
- the heat medium H injected from the injection nozzle 7 is injected intensively in a certain direction for effective vertical stirring, while being distributed so that the flow of the heat medium H extends over the entire bladder 2. It is preferable not to make a dead space for stirring by discharging from the discharge port 8 at a low speed.
- the circumferential interval from the injection nozzle 7 adjacent to the discharge port 8 in the flow direction of the heat medium H should be as large as possible as illustrated in FIGS. Further, when the injection pressure for injecting the heat medium H from the injection nozzle 7 is set 200 kPa to 500 kPa higher than the discharge pressure for discharging the heat medium H from the discharge port 8, the heat medium H flows smoothly inside the bladder 2. This is advantageous in reducing the temperature difference of the bladder 2.
- the heat medium H can easily flow smoothly inside the bladder 2, which is advantageous for reducing the temperature difference of the bladder 2.
- the injection nozzles 7 are preferably provided at equal intervals in the circumferential direction. Even when a plurality of discharge ports 8 are provided, the discharge ports 8 may be provided at equal intervals in the circumferential direction.
- the projecting portion 4 is extended in an intermittent state, it is advantageous in suppressing the rigidity of the bladder 2 from being excessive as compared with the specification extended in a continuous state. Become. Therefore, a decrease in the expansion / contraction property of the bladder 2 can be suppressed.
- the protruding portion 4 can be extended on the inner wall surface of the annular bladder 2 in a state of being inclined obliquely with respect to the circumferential direction.
- the protrusions 4 are continuously extended in this way, it becomes easier to induce the heat medium H as compared to the specification extending in an intermittent state, and thus the swirl of the heat medium H is likely to occur. It becomes more advantageous to reduce the temperature difference of the bladder 2.
- the present invention can also be applied to gas vulcanization using various inert gases such as water vapor as the heat medium H and nitrogen gas, argon gas, deoxygenated air as the pressure medium.
- the injection direction of the heat medium H of the injection nozzle 7 is preferably set in the tangential direction of the expanded annular bladder 2 in plan view, as exemplified in the embodiment. According to this specification, the impact received by the inner wall surface of the bladder 2 by the heat medium H injected into the bladder 2 can be easily mitigated. That is, the injected heat medium H does not directly hit the inner wall surface of the bladder 2.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
2 ブラダ
3a 上側ビード部
3b 下側ビード部
4 突状部
5 中心機構
6a 上側ビード保持部
6b 下側ビード保持部
7 注入ノズル
7a 制御弁
8 排出口
8a 制御弁
9(9a、9b、9c、9d) モールド
G グリーンタイヤ
H 熱媒体
Claims (8)
- 筒状のブラダの内壁面に、その円周方向に対して斜めに傾斜して断続した状態または連続した状態で延びる突状部を備えて、グリーンタイヤ加硫時に内部に熱媒体および加圧媒体となる温水、または、熱媒体となる水蒸気と加圧媒体となるガスが充填されることを特徴とするタイヤ加硫用ブラダ。
- 前記突状部のブラダ円周方向に対する傾斜角度が、マイナス30°~プラス30°の範囲に設定されている請求項1に記載のタイヤ加硫用ブラダ。
- 前記突状部の厚さが、膨張した際のブラダの厚さ以下に設定されている請求項1または2に記載のタイヤ加硫用ブラダ。
- 前記突状部の高さが、その厚さの3倍~5倍の範囲に設定されている請求項1~3のいずれかに記載のタイヤ加硫用ブラダ。
- 請求項1~4のいずれかに記載のタイヤ加硫用ブラダと、このブラダの上側ビード部および下側ビード部を保持するビード保持部を有する中心機構とを備え、この中心機構に、ブラダの内部に熱媒体および加圧媒体となる温水、または、熱媒体となる水蒸気と加圧媒体となるガスを注入する注入ノズルと、注入された熱媒体および加圧媒体となる温水、または、熱媒体となる水蒸気と加圧媒体となるガスをブラダの外部に排出する排出口とが設けられたことを特徴とするタイヤ加硫装置。
- 前記注入ノズルおよび排出口の少なくとも一方が複数設けられている請求項5に記載のタイヤ加硫装置。
- 前記注入ノズルから熱媒体および加圧媒体となる温水、または、熱媒体となる水蒸気と加圧媒体となるガスを注入する注入圧力が、前記排出口から熱媒体および加圧媒体となる温水、または、熱媒体となる水蒸気と加圧媒体となるガスを排出する排出圧力に対して、200kPa~500kPa高く設定されている請求項5または6に記載のタイヤ加硫装置。
- 前記注入ノズルの注入方向が、平面視で、膨張した環状のブラダの接線方向に設定されている請求項5~7のいずれかに記載のタイヤ加硫装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020147010045A KR20140072098A (ko) | 2011-09-30 | 2012-09-24 | 타이어 가류용 블래더 및 타이어 가류 장치 |
US14/345,212 US9120281B2 (en) | 2011-09-30 | 2012-09-24 | Bladder for tire vulcanization and tire vulcanization device |
EP12835368.7A EP2762288A4 (en) | 2011-09-30 | 2012-09-24 | TIRE VOLCANIZATION BLADDER AND TIRE VOLCANISOR |
CN201280044066.XA CN103781606B (zh) | 2011-09-30 | 2012-09-24 | 轮胎硫化用鼓以及轮胎硫化装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011216043A JP5304866B2 (ja) | 2011-09-30 | 2011-09-30 | タイヤ加硫用ブラダおよびタイヤ加硫装置 |
JP2011-216043 | 2011-09-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2013047422A1 true WO2013047422A1 (ja) | 2013-04-04 |
Family
ID=47995454
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2012/074365 WO2013047422A1 (ja) | 2011-09-30 | 2012-09-24 | タイヤ加硫用ブラダおよびタイヤ加硫装置 |
Country Status (6)
Country | Link |
---|---|
US (1) | US9120281B2 (ja) |
EP (1) | EP2762288A4 (ja) |
JP (1) | JP5304866B2 (ja) |
KR (1) | KR20140072098A (ja) |
CN (1) | CN103781606B (ja) |
WO (1) | WO2013047422A1 (ja) |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6255993B2 (ja) * | 2013-12-27 | 2018-01-10 | 横浜ゴム株式会社 | タイヤ加硫用ブラダ |
JP6520014B2 (ja) * | 2014-08-19 | 2019-05-29 | 横浜ゴム株式会社 | 空気入りタイヤの加硫装置 |
EP3504054B1 (de) * | 2016-08-25 | 2021-12-08 | Harburg-Freudenberger Maschinenbau GmbH | Verfahren und vorrichtung zum vulkanisieren von reifen |
AU2017228601B2 (en) | 2016-09-25 | 2023-03-23 | The Goodyear Tire & Rubber Company | Heavy duty tyre |
JP6809084B2 (ja) * | 2016-09-26 | 2021-01-06 | 住友ゴム工業株式会社 | タイヤ加硫装置 |
EP3622098A2 (en) * | 2017-05-12 | 2020-03-18 | GVD Corporation | Systems for depositing coatings on surfaces and associated methods |
CN108297322A (zh) * | 2018-02-05 | 2018-07-20 | 青岛双星橡塑机械有限公司 | 节能型轮胎硫化机 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5628843A (en) | 1979-08-17 | 1981-03-23 | Kobe Steel Ltd | Central mechanism for tyre vulcanizing machine |
JPS60114711U (ja) * | 1983-12-29 | 1985-08-03 | 横浜ゴム株式会社 | タイヤ加硫用ブラダ− |
JPH06238670A (ja) | 1993-02-15 | 1994-08-30 | Sumitomo Rubber Ind Ltd | エラストマー物品の加硫装置 |
JP2004122650A (ja) * | 2002-10-04 | 2004-04-22 | Kobe Steel Ltd | タイヤ加硫装置及びタイヤ加硫方法 |
JP2010110971A (ja) * | 2008-11-05 | 2010-05-20 | Bridgestone Corp | タイヤ加硫装置及びタイヤ製造方法 |
JP2012135939A (ja) * | 2010-12-27 | 2012-07-19 | Sumitomo Rubber Ind Ltd | タイヤの製造方法 |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2695424A (en) * | 1951-12-17 | 1954-11-30 | Us Rubber Co | Thin walled curing bag |
LU33181A1 (ja) * | 1954-03-02 | |||
US2835923A (en) * | 1956-06-26 | 1958-05-27 | Robbins Tire And Rubber Compan | Curing bag drainer assembly |
GB938797A (en) * | 1960-06-07 | 1963-10-09 | Macbeth Patents Ltd | Improvements in or relating to the manufacture of vehicle tyres |
US3970416A (en) * | 1975-07-14 | 1976-07-20 | The B. F. Goodrich Company | Reinforced membrane |
US3989429A (en) * | 1975-07-14 | 1976-11-02 | The B. F. Goodrich Company | Reinforced membrane |
FR2337030A1 (fr) * | 1976-01-02 | 1977-07-29 | Michelin & Cie | Membrane de moulage de pneumatiques et son procede de fabrication |
US4293293A (en) * | 1979-05-02 | 1981-10-06 | Donald Macmillan & Son, Inc. | Tire retreading bladder |
JPS61162306A (ja) * | 1985-01-10 | 1986-07-23 | Sumitomo Rubber Ind Ltd | タイヤ加硫用ブラダ− |
JPH07232331A (ja) * | 1994-02-24 | 1995-09-05 | Bridgestone Corp | タイヤ加硫用ブラダー |
-
2011
- 2011-09-30 JP JP2011216043A patent/JP5304866B2/ja not_active Expired - Fee Related
-
2012
- 2012-09-24 US US14/345,212 patent/US9120281B2/en not_active Expired - Fee Related
- 2012-09-24 KR KR1020147010045A patent/KR20140072098A/ko not_active Application Discontinuation
- 2012-09-24 WO PCT/JP2012/074365 patent/WO2013047422A1/ja active Application Filing
- 2012-09-24 CN CN201280044066.XA patent/CN103781606B/zh not_active Expired - Fee Related
- 2012-09-24 EP EP12835368.7A patent/EP2762288A4/en not_active Withdrawn
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5628843A (en) | 1979-08-17 | 1981-03-23 | Kobe Steel Ltd | Central mechanism for tyre vulcanizing machine |
JPS60114711U (ja) * | 1983-12-29 | 1985-08-03 | 横浜ゴム株式会社 | タイヤ加硫用ブラダ− |
JPH06238670A (ja) | 1993-02-15 | 1994-08-30 | Sumitomo Rubber Ind Ltd | エラストマー物品の加硫装置 |
JP2004122650A (ja) * | 2002-10-04 | 2004-04-22 | Kobe Steel Ltd | タイヤ加硫装置及びタイヤ加硫方法 |
JP2010110971A (ja) * | 2008-11-05 | 2010-05-20 | Bridgestone Corp | タイヤ加硫装置及びタイヤ製造方法 |
JP2012135939A (ja) * | 2010-12-27 | 2012-07-19 | Sumitomo Rubber Ind Ltd | タイヤの製造方法 |
Non-Patent Citations (1)
Title |
---|
See also references of EP2762288A4 * |
Also Published As
Publication number | Publication date |
---|---|
US20150079211A1 (en) | 2015-03-19 |
CN103781606B (zh) | 2016-03-16 |
JP2013075402A (ja) | 2013-04-25 |
EP2762288A4 (en) | 2015-03-11 |
EP2762288A1 (en) | 2014-08-06 |
JP5304866B2 (ja) | 2013-10-02 |
US9120281B2 (en) | 2015-09-01 |
KR20140072098A (ko) | 2014-06-12 |
CN103781606A (zh) | 2014-05-07 |
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