JP2012101368A - Method of vulcanizing tire - Google Patents
Method of vulcanizing tire Download PDFInfo
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- JP2012101368A JP2012101368A JP2010248906A JP2010248906A JP2012101368A JP 2012101368 A JP2012101368 A JP 2012101368A JP 2010248906 A JP2010248906 A JP 2010248906A JP 2010248906 A JP2010248906 A JP 2010248906A JP 2012101368 A JP2012101368 A JP 2012101368A
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- tire
- mold
- unvulcanized tire
- tread surface
- unvulcanized
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- 238000000034 method Methods 0.000 title claims abstract description 40
- 238000004073 vulcanization Methods 0.000 claims abstract description 19
- 238000010438 heat treatment Methods 0.000 claims description 12
- 239000002184 metal Substances 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 abstract description 7
- 230000011218 segmentation Effects 0.000 description 4
- 239000000758 substrate Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 239000004636 vulcanized rubber Substances 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
- B29D30/10—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
- Tyre Moulding (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
Abstract
Description
本発明は、例えば空気入りタイヤの製造に用いられるタイヤ加硫方法に関する。 The present invention relates to a tire vulcanization method used for manufacturing a pneumatic tire, for example.
従来、タイヤ加硫方法については、例えば、特許文献１がある。この従来技術では、ブラダーにおける金型の分割位置に対応する部分を、他の部分よりも膨張時のタイヤ径方向の伸びが遅くなるように形成している。このため、各割モールドの周方向端部同士が完全に当接する前に各割モールドの間に未加硫タイヤの一部のゴムが入り込むことなく加硫成形できるようになっている。 Conventionally, there exists patent document 1 about the tire vulcanization method, for example. In this prior art, the part corresponding to the division | segmentation position of the metal mold | die in a bladder is formed so that the elongation of the tire radial direction at the time of expansion | swelling may become slower than another part. For this reason, vulcanization molding can be performed without causing a part of the rubber of the unvulcanized tire to enter between the split molds before the circumferential ends of the split molds are completely in contact with each other.
しかしながら、特許文献１では、ブラダーにおける金型の分割位置に対応する部分を、他の部分よりもタイヤ径方向の厚さの大きい偏肉部によって形成することにより、偏肉部が他の部分よりも膨張時のタイヤ径方向の伸びが遅くなるようにしている。このため、ブラダーを変更する必要がある。この結果、装置の構成が複雑になりコストアップになる。 However, in patent document 1, the part corresponding to the division | segmentation position of the metal mold | die in a bladder is formed by the uneven thickness part whose thickness of a tire radial direction is larger than another part, and an uneven thickness part is more than other parts. Also, the expansion in the tire radial direction during expansion is slowed down. For this reason, it is necessary to change the bladder. As a result, the configuration of the apparatus becomes complicated and the cost increases.
本発明は、上記問題を考慮し、割モールドの間に未加硫タイヤの一部のゴムが入り込むのを容易に防止できるタイヤ加硫方法を提供することが目的である。 In view of the above problems, an object of the present invention is to provide a tire vulcanizing method that can easily prevent a part of rubber of an unvulcanized tire from entering between split molds.
請求項１に記載の本発明のタイヤ加硫方法は、タイヤ周方向に沿って複数の割モールドに分割された金型の分割位置となる未加硫タイヤのトレッド表面にラジアル方向の凹部を形成し、前記未加硫タイヤの前記トレッド表面側に前記金型を配置すると共に、前記未加硫タイヤ内に配置したブラダーを膨張させて前記未加硫タイヤの内面を加圧することにより、前記トレッド表面を前記金型に押し付け前記未加硫タイヤを加硫成形する。 In the tire vulcanizing method according to the first aspect of the present invention, a radial concave portion is formed on the tread surface of an unvulcanized tire which is a division position of a mold divided into a plurality of split molds along the tire circumferential direction. The mold is disposed on the tread surface side of the unvulcanized tire, and the inner surface of the unvulcanized tire is pressurized by inflating a bladder disposed in the unvulcanized tire. The unvulcanized tire is vulcanized and molded by pressing the surface against the mold.
請求項１に記載のタイヤ加硫方法では、タイヤ周方向に沿って複数の割モールドに分割された金型の分割位置となる未加硫タイヤのトレッド表面に、ラジアル方向の凹部を形成する。次に、未加硫タイヤのトレッド表面側に金型を配置すると共に、未加硫タイヤ内に配置したブラダーを膨張させて未加硫タイヤの内面を加圧することにより、トレッド表面を金型に押し付け未加硫タイヤを加硫成形する。このため、未加硫タイヤのトレッド表面に形成したラジアル方向の凹部によって、未加硫タイヤのトレッド表面における金型の分割位置に対応する部分が、他の部分よりも膨張時の金型への到達が遅くなる。この結果、各割モールドの周方向端部同士が完全に当接する前に各割モールドの間に未加硫タイヤの一部のゴムが入り込むことなく加硫成形できる。また、未加硫タイヤのトレッド表面に、ラジアル方向の凹部を形成すればよいため、各割モールドの間に未加硫タイヤの一部のゴムが入り込むのを容易に防止できる。 In the tire vulcanizing method according to the first aspect, the radial concave portion is formed on the tread surface of the unvulcanized tire which becomes the division position of the mold divided into the plurality of split molds along the tire circumferential direction. Next, the mold is disposed on the tread surface side of the unvulcanized tire, and the bladder disposed in the unvulcanized tire is inflated to pressurize the inner surface of the unvulcanized tire so that the tread surface becomes the mold. Pressed unvulcanized tires are vulcanized. For this reason, due to the radial recesses formed on the tread surface of the unvulcanized tire, the portion corresponding to the mold split position on the tread surface of the unvulcanized tire is more expanded to the mold during expansion than the other portions. Reach slow. As a result, it is possible to vulcanize and mold the rubber without part of the rubber of the unvulcanized tire entering between the split molds before the circumferential ends of the split molds are completely in contact with each other. In addition, since a radial recess may be formed on the tread surface of the unvulcanized tire, it is possible to easily prevent a part of the rubber of the unvulcanized tire from entering between the split molds.
請求項２に記載の本発明は、請求項１に記載のタイヤ加硫方法において、前記金型の分割位置の数と前記凹部の数とが同じである。 According to a second aspect of the present invention, in the tire vulcanizing method according to the first aspect, the number of division positions of the mold is the same as the number of the concave portions.
請求項２に記載のタイヤ加硫方法によれば、金型の分割位置の数と凹部の数とが同じであるため、トレッド表面の全周において割モールドの間に未加硫タイヤの一部のゴムが入り込むのを容易に防止できる。 According to the tire vulcanizing method according to claim 2, since the number of the dividing positions of the mold and the number of the concave portions are the same, a part of the unvulcanized tire is provided between the split molds on the entire circumference of the tread surface. Can easily prevent the rubber from entering.
請求項３に記載の本発明は、請求項１または請求項２に記載のタイヤ加硫方法において、前記凹部の形状は、前記凹部を設けない前記トレッド表面が前記金型の分割位置に噛み込まれる形状に対応している。 According to a third aspect of the present invention, in the tire vulcanizing method according to the first or second aspect, the shape of the concave portion is such that the tread surface not provided with the concave portion is engaged with a dividing position of the mold. It corresponds to the shape.
請求項３に記載のタイヤ加硫方法によれば、凹部の形状が、凹部を設けないトレッド表面が金型の分割位置に噛み込まれる形状に対応している。このため、割モールドの間に未加硫タイヤの一部のゴムが入り込むのを容易に防止できると共に、、加硫成形後のタイヤのトレッド表面に凹部によって窪みが残るのを防止できるので加硫成形後のトレッド表面の形状を確保することができる。 According to the tire vulcanizing method of the third aspect, the shape of the concave portion corresponds to the shape in which the tread surface not provided with the concave portion is bitten into the dividing position of the mold. For this reason, it is possible to easily prevent a part of the rubber of the unvulcanized tire from entering between the split molds, and it is also possible to prevent the depression from remaining on the tread surface of the tire after vulcanization molding due to the recess. The shape of the tread surface after molding can be secured.
請求項４に記載の本発明は、請求項１〜３の何れか１項に記載のタイヤ加硫方法において、前記凹部は、タイヤグルーバーによって形成する。 According to a fourth aspect of the present invention, in the tire vulcanizing method according to any one of the first to third aspects, the recess is formed by a tire groover.
請求項４に記載のタイヤ加硫方法では、凹部をタイヤグルーバーによって形成するため、未加硫タイヤに凹部を容易に形成することができる。 In the tire vulcanizing method according to the fourth aspect, since the concave portion is formed by the tire groover, the concave portion can be easily formed in the unvulcanized tire.
請求項５に記載の本発明は、請求項１〜３の何れか１項に記載のタイヤ加硫方法において、前記凹部は、電熱線を内蔵した凸形状突起によって形成する。 According to a fifth aspect of the present invention, in the tire vulcanizing method according to any one of the first to third aspects, the concave portion is formed by a convex protrusion having a built-in heating wire.
請求項５に記載のタイヤ加硫方法では、凹部を電熱線を内蔵した凸形状突起（治具）によって形成するため、未加硫タイヤに凹部を容易に形成することができる。 In the tire vulcanizing method according to the fifth aspect, since the concave portion is formed by the convex protrusion (jig) incorporating the heating wire, the concave portion can be easily formed in the unvulcanized tire.
請求項６に記載の本発明は、請求項５に記載のタイヤ加硫方法において、前記電熱線を内蔵した凸形状突起は、前記未加硫タイヤを取り出す際に使用するＯリング形状となるセグメントに設けられている。 According to a sixth aspect of the present invention, in the tire vulcanizing method according to the fifth aspect, the convex protrusion having the heating wire is an O-ring shaped segment used when taking out the unvulcanized tire. Is provided.
請求項６に記載のタイヤ加硫方法では、電熱線を内蔵した凸形状突起（治具）が、記未加硫タイヤを取り出す際に使用するＯリング形状となるセグメントに設けられているため、未加硫タイヤに凹部を容易に形成することができる。 In the tire vulcanization method according to claim 6, since the convex protrusion (jig) with a built-in heating wire is provided in the O-ring shaped segment used when taking out the unvulcanized tire, A recess can be easily formed in the unvulcanized tire.
請求項１に記載の本発明に係るタイヤ加硫方法は、上記方法としたので、割モールドの間に未加硫タイヤの一部のゴムが入り込むのを容易に防止できる。 Since the tire vulcanizing method according to the first aspect of the present invention is the above method, it is possible to easily prevent a part of the rubber of the unvulcanized tire from entering between the split molds.
請求項２に記載の本発明に係るタイヤ加硫方法は、上記方法としたので、トレッド表面の全周において割モールドの間に未加硫タイヤの一部のゴムが入り込むのを容易に防止できる。 Since the tire vulcanizing method according to the second aspect of the present invention is the above method, it is possible to easily prevent a part of rubber of the unvulcanized tire from entering between the split molds on the entire circumference of the tread surface. .
請求項３に記載の本発明に係るタイヤ加硫方法は、上記方法としたので、割モールドの間に未加硫タイヤの一部のゴムが入り込むのを容易に防止できると共に、加硫成形後のトレッド表面形状を確保することができる。 Since the tire vulcanizing method according to the third aspect of the present invention is the above method, it is possible to easily prevent a part of rubber of the unvulcanized tire from entering between the split molds, and after vulcanization molding. The tread surface shape can be ensured.
請求項４に記載の本発明に係るタイヤ加硫方法は、上記構成としたので、未加硫タイヤの凹部を容易に形成することができる。 Since the tire vulcanizing method according to the fourth aspect of the present invention has the above-described configuration, the concave portion of the unvulcanized tire can be easily formed.
請求項５に記載の本発明に係るタイヤ加硫方法は、上記構成としたので、未加硫タイヤの凹部を容易に形成することができる。 Since the tire vulcanizing method according to the fifth aspect of the present invention is configured as described above, the concave portion of the unvulcanized tire can be easily formed.
請求項６に記載の本発明に係るタイヤ加硫方法は、上記構成としたので、未加硫タイヤの凹部を容易に形成することができる。 Since the tire vulcanizing method according to the sixth aspect of the present invention has the above-described configuration, the concave portion of the unvulcanized tire can be easily formed.
以下、図１〜図５に従って本発明に係るタイヤ加硫方法の一実施形態について説明する。 Hereinafter, an embodiment of a tire vulcanizing method according to the present invention will be described with reference to FIGS.
（加硫装置）
図５に示すように、本実施形態の加硫装置１０は、未加硫タイヤ１２の外面側に配置される金型１４と、未加硫タイヤ１２の内面側に配置されるブラダーユニット１６とを備えている。また、未加硫のタイヤ１２は金型１４とブラダーユニット１６との間に配置されるようになっている。
(Vulcanization equipment)
As shown in FIG. 5, the vulcanizing apparatus 10 of this embodiment includes a mold 14 disposed on the outer surface side of the unvulcanized tire 12, and a bladder unit 16 disposed on the inner surface side of the unvulcanized tire 12. It has. Further, the unvulcanized tire 12 is arranged between the mold 14 and the bladder unit 16.
金型１４は上下一対の上型１８及び下型２０と中型２２とから構成されている。上型１８及び下型２０は、未加硫タイヤ１２の両側面にそれぞれ対応するようになっている。また、上型１８及び下型２０はそれぞれ基板２４、２６によって支持されており、上型１８は基板２４と共に上方（図５の矢印Ａ方向）と下方（図５の矢印Ｂ方向）とに移動可能となっている。 The mold 14 includes a pair of upper and lower upper molds 18, a lower mold 20, and a middle mold 22. The upper mold 18 and the lower mold 20 correspond to both side surfaces of the unvulcanized tire 12, respectively. The upper mold 18 and the lower mold 20 are supported by substrates 24 and 26, respectively. The upper mold 18 moves upward (in the direction of arrow A in FIG. 5) and downward (in the direction of arrow B in FIG. 5) together with the substrate 24. It is possible.
中型２２は、未加硫タイヤ１２のトレッド表面１２Ａに対応するようになっており、タイヤ周方向に沿って複数の割モールド２２Ａに分割されている。また、中型２２の各割モールド２２Ａは内周面にトレッドパターンを成型するキャビティを有しており、それぞれ支持部２８を介して基板２４にタイヤ径方向（図５の矢印Ｃ方向とＤ方向）へ移動可能に支持されている。 The middle mold 22 corresponds to the tread surface 12A of the unvulcanized tire 12, and is divided into a plurality of split molds 22A along the tire circumferential direction. Further, each split mold 22A of the middle mold 22 has a cavity for molding a tread pattern on the inner peripheral surface, and the tire 24 in the tire radial direction (directions of arrows C and D in FIG. 5) via the support portion 28, respectively. It is supported so as to be movable.
一方、ブラダーユニット１６は、上下一対のブラダークランプ３０、３２と、ブラダー３４とを有しており、ブラダー３４は各ブラダークランプ３０、３２によって支持されている。また、ブラダー３４は樹脂繊維製コードや金属製コードによって補強された加硫ゴムからなり可撓性となっている。 On the other hand, the bladder unit 16 has a pair of upper and lower bladder clamps 30 and 32 and a bladder 34, and the bladder 34 is supported by the bladder clamps 30 and 32. The bladder 34 is made of vulcanized rubber reinforced with a resin fiber cord or a metal cord and is flexible.
各ブラダークランプ３０、３２は支軸４０によって上下方向に移動可能に支持されている。また、下方のブラダークランプ３２には蒸気流入口３６が設けられており、各ブラダークランプ３０、３２及びブラダー３４によって閉鎖された空間に蒸気流入口３６から加熱蒸気を供給することにより、ブラダー３４が膨張するようになっている。 The bladder clamps 30 and 32 are supported by the support shaft 40 so as to be movable in the vertical direction. The lower bladder clamp 32 is provided with a steam inlet 36. By supplying heated steam from the steam inlet 36 to a space closed by the bladder clamps 30, 32 and the bladder 34, the bladder 34 is It comes to expand.
（未加硫タイヤ）
図２に示すように、未加硫タイヤ１２のトレッド表面１２Ａには、タイヤ周方向に沿って所定の間隔でラジアル方向（未加硫タイヤ１２の軸線方向に沿った方向）に沿って連続した凹部４４が形成されている。また、これらの凹部４４は図１及び図４に示すタイヤ周方向に沿って複数の割モールド２２Ａに分割された中型２２の分割位置と一致するようになっている。
(Unvulcanized tire)
As shown in FIG. 2, the tread surface 12A of the unvulcanized tire 12 continues along the radial direction (direction along the axial direction of the unvulcanized tire 12) at a predetermined interval along the tire circumferential direction. A recess 44 is formed. Moreover, these recessed parts 44 correspond with the division | segmentation position of the middle mold | type 22 divided | segmented into several split mold 22A along the tire circumferential direction shown in FIG.1 and FIG.4.
図３に示すように、凹部４４のラジアル方向から見た断面形状は、底部と開口縁部が円弧状となったＶ字状となっており、凹部４４の形状は、凹部４４を設けない未加硫タイヤ１２のトレッド表面１２Ａが各割モールド２２Ａの間に噛み込まれるゴムの形状に対応している。即ち、凹部４４の容積は、凹部４４を設けない未加硫タイヤ１２のトレッド表面１２Ａが各割モールド２２Ａの間に噛み込まれるゴムの容積と同じになっている。 As shown in FIG. 3, the cross-sectional shape of the concave portion 44 viewed from the radial direction is a V shape in which the bottom portion and the opening edge portion are arcuate, and the concave portion 44 is not provided with the concave portion 44. The tread surface 12A of the vulcanized tire 12 corresponds to the shape of rubber that is bitten between the split molds 22A. In other words, the volume of the recess 44 is the same as the volume of rubber in which the tread surface 12A of the unvulcanized tire 12 without the recess 44 is caught between the split molds 22A.
また、図１に示すように、未加硫タイヤ１２のトレッド表面１２Ａに形成された凹部４４の数は中型２２の分割位置の数と同じになっている。即ち、中型２２の全ての分割位置に対応する未加硫タイヤ１２のトレッド表面１２Ａに凹部４４が形成されている。 Further, as shown in FIG. 1, the number of recesses 44 formed on the tread surface 12 </ b> A of the unvulcanized tire 12 is the same as the number of division positions of the middle mold 22. That is, the recesses 44 are formed in the tread surface 12A of the unvulcanized tire 12 corresponding to all the division positions of the middle mold 22.
（タイヤ加硫方法） (Tire vulcanization method)
以上のように構成された加硫装置により未加硫タイヤ１２を加硫する場合は、先ず、未加硫タイヤ１２のトレッド表面１２Ａの中型２２の分割位置となる部位に凹部４４を形成する。未加硫タイヤ１２のトレッド表面１２Ａに凹部４４を形成する方法としては、タイヤのトレッドパターンのカットに使用するタイヤグルーバーによって形成する方法、又は電熱線を内蔵した凸形状突起（治具）によって形成する方法がある。なお、電熱線を内蔵した凸形状突起（治具）は、未加硫タイヤ１２を取り出す際に使用するＯリング形状となるセグメントに設けてもよい。 When the unvulcanized tire 12 is vulcanized by the vulcanizing apparatus configured as described above, first, the concave portion 44 is formed in a portion to be a division position of the middle mold 22 of the tread surface 12A of the unvulcanized tire 12. As a method of forming the recess 44 on the tread surface 12A of the unvulcanized tire 12, a method of forming by a tire groove used for cutting a tread pattern of the tire or a method of forming a convex protrusion (jig) incorporating a heating wire is used. There is a way to do it. In addition, you may provide the convex-shaped protrusion (jig) which incorporated the heating wire in the segment used as the O-ring shape used when taking out the unvulcanized tire 12. FIG.
次に、ブラダー３４が収縮したブラダーユニット１６を未加硫タイヤ１２の内部（径方向内側）に配置すると共に未加硫タイヤ１２を金型１４内に配置する。その際、本実施形態では、図１に示すように、未加硫タイヤ１２のトレッド表面１２Ａに形成された凹部４４の位置を中型２２の分割位置、即ち、隣接する割モールド２２Ａの間に配置する。 Next, the bladder unit 16 contracted by the bladder 34 is arranged inside the unvulcanized tire 12 (inside in the radial direction) and the unvulcanized tire 12 is arranged in the mold 14. At this time, in this embodiment, as shown in FIG. 1, the position of the recess 44 formed on the tread surface 12A of the unvulcanized tire 12 is arranged between the division positions of the middle mold 22, that is, between the adjacent split molds 22A. To do.
次に、図４に示すように、中型２２の各割モールド２２Ａの周方向端部同士を当接させると共に、ブラダーユニット１６のブラダー３４を加熱蒸気によって膨張させる。これにより、未加硫タイヤ１２の内面がブラダー３４によって加圧及び加熱されるとともに、未加硫タイヤ１２のトレッド表面が金型１４に押し付けられて成形される。 Next, as shown in FIG. 4, the circumferential ends of the split molds 22A of the middle mold 22 are brought into contact with each other, and the bladder 34 of the bladder unit 16 is expanded by heated steam. As a result, the inner surface of the unvulcanized tire 12 is pressurized and heated by the bladder 34, and the tread surface of the unvulcanized tire 12 is pressed against the mold 14 to be molded.
この際、本実施形態では、未加硫タイヤ１２のトレッド表面１２Ａに形成された凹部４４の位置が中型２２の分割位置となっている。このため、未加硫タイヤ１２のトレッド表面１２Ａにおける中型２２の分割位置に対応する部分が、他の部分よりも膨張時の中型２２への到達が遅くなる。このため、各割モールド２２Ａの間に未加硫タイヤ１２の一部のゴムが入り込むことなく加硫成形される。 At this time, in the present embodiment, the position of the recess 44 formed on the tread surface 12A of the unvulcanized tire 12 is the division position of the middle mold 22. For this reason, the part corresponding to the division position of the middle mold 22 on the tread surface 12A of the unvulcanized tire 12 arrives at the middle mold 22 at the time of expansion more slowly than the other parts. For this reason, it vulcanizes and molds, without a part of rubber | gum of the unvulcanized tire 12 entering between each split mold 22A.
（作用・効果）
このように、本実施形態では、中型２２の分割位置となる未加硫タイヤ１２のトレッド表面１２Ａに、ラジアル方向の凹部４４を形成したため、各割モールド２２Ａの間に未加硫タイヤ１２の一部のゴムが入り込むことがない。この結果、各割モールド２２Ａの間に未加硫タイヤ１２の一部のゴムが入り込むのを容易且つ低コストで防止できる。
(Action / Effect)
As described above, in the present embodiment, since the radial recesses 44 are formed on the tread surface 12A of the unvulcanized tire 12 that is the division position of the middle mold 22, one unvulcanized tire 12 is provided between the split molds 22A. The rubber of the part does not enter. As a result, it is possible to easily and inexpensively prevent a part of the rubber of the unvulcanized tire 12 from entering between each split mold 22A.
また、本実施形態では、分割された中型２２の分割位置の数と、凹部４４の数とが同じになっている。このため、未加硫タイヤ１２のトレッド表面１２Ａの全周において、各割モールド２２Ａの間に未加硫タイヤ１２の一部のゴムが入り込むのを容易に防止できる。 In the present embodiment, the number of division positions of the divided middle mold 22 is the same as the number of recesses 44. For this reason, it is possible to easily prevent a part of the rubber of the unvulcanized tire 12 from entering between the split molds 22A on the entire circumference of the tread surface 12A of the unvulcanized tire 12.
また、本実施形態では、凹部４４のラジアル方向から見た断面形状が、凹部４４を設けない未加硫タイヤ１２のトレッド表面１２Ａが中型２２の分割位置に噛み込まれる形状に対応している。このため、各割モールド２２Ａの間に未加硫タイヤ１２の一部のゴムが入り込むのを容易に防止できると共に、加硫成形後のタイヤのトレッド表面に凹部４４によって窪みが残るのを防止できるのでトレッド表面形状を確保することができる。 In the present embodiment, the cross-sectional shape of the concave portion 44 viewed from the radial direction corresponds to the shape in which the tread surface 12A of the unvulcanized tire 12 without the concave portion 44 is bitten into the division position of the middle mold 22. For this reason, it is possible to easily prevent a part of the rubber of the unvulcanized tire 12 from entering between each split mold 22A, and it is possible to prevent the depression 44 from remaining on the tread surface of the tire after vulcanization molding. Therefore, the tread surface shape can be secured.
また、本実施形態では、タイヤグルーバー又は電熱線を内蔵した凸形状突起（治具）によって、未加硫タイヤ１２のトレッド表面１２Ａに凹部４４を形成する。このため、凹部４４を容易に形成することができる。さらに、電熱線を内蔵した凸形状突起（治具）を、未加硫タイヤ１２を取り出す際に使用するＯリング形状となるセグメントに設けることで、凹部４４をさらに容易に形成することができる。 In the present embodiment, the concave portion 44 is formed on the tread surface 12A of the unvulcanized tire 12 by a convex protrusion (jig) incorporating a tire groover or heating wire. For this reason, the recessed part 44 can be formed easily. Furthermore, the concave portion 44 can be formed more easily by providing a convex protrusion (jig) containing a heating wire in a segment having an O-ring shape used when the unvulcanized tire 12 is taken out.
（その他の実施形態）
以上、実施形態を挙げて本発明の実施の形態を説明したが、これらの実施形態は一例であり、要旨を逸脱しない範囲内で種々変更して実施できる。また、本発明の権利範囲がこれらの実施形態に限定されないことは言うまでもない。例えば、未加硫タイヤ１２のトレッド表面１２Ａに凹部４４を形成する方法は、タイヤグルーバー又は電熱線を内蔵した凸形状突起（治具）による方法に限定されず、他の方法で形成してもよい。また、電熱線を内蔵した凸形状突起（治具）は未加硫タイヤ１２を取り出す際に使用するＯリング形状となるセグメント以外に設けてもよい。
(Other embodiments)
The embodiments of the present invention have been described above with reference to the embodiments. However, these embodiments are merely examples, and various modifications can be made without departing from the scope of the invention. It goes without saying that the scope of rights of the present invention is not limited to these embodiments. For example, the method of forming the recess 44 on the tread surface 12A of the unvulcanized tire 12 is not limited to the method using a tire groove or a convex protrusion (jig) with a built-in heating wire, and may be formed by other methods. Good. Moreover, you may provide the convex-shaped protrusion (jig) which incorporated the heating wire in addition to the segment used as the O-ring shape used when taking out the unvulcanized tire 12.
また、上記実施形態では、凹部４４のラジアル方向から見た断面形状を、底部と開口縁部が円弧状となったＶ字状としたが、凹部４４のラジアル方向から見た断面形状は半円状等の他の形状としてもよい。 Moreover, in the said embodiment, although the cross-sectional shape seen from the radial direction of the recessed part 44 was made into the V shape where the bottom part and the opening edge became circular arc shape, the cross-sectional shape seen from the radial direction of the recessed part 44 was semicircle. It is good also as other shapes, such as a shape.
また、上記実施形態では、中型２２の全ての分割位置に対応する未加硫タイヤ１２のトレッド表面１２Ａに凹部４４を形成したが、これに代えて、未加硫タイヤの一部のゴムが入り込み易い所定の分割位置に対応する未加硫タイヤ１２のトレッド表面１２Ａにのみ凹部４４を形成してもよい。 Moreover, in the said embodiment, although the recessed part 44 was formed in tread surface 12A of the unvulcanized tire 12 corresponding to all the division | segmentation positions of the intermediate mold 22, it replaces with this and a part of rubber | gum of an unvulcanized tire enters. The concave portion 44 may be formed only on the tread surface 12A of the unvulcanized tire 12 corresponding to the predetermined division position that is easy.
１０ 加硫装置
１２ 未加硫タイヤ
１２Ａ 未加硫タイヤのトレッド表面
１４ 金型
１６ ブラダーユニット
１８ 上型
２０ 下型
２２ 中型
２２Ａ 割モールド
３４ ブラダー
４４ 未加硫タイヤの凹部
DESCRIPTION OF SYMBOLS 10 Curing apparatus 12 Unvulcanized tire 12A Tread surface of unvulcanized tire 14 Mold 16 Bladder unit 18 Upper mold 20 Lower mold 22 Medium mold 22A Split mold 34 Bladder 44 Concave part of unvulcanized tire
Claims (6)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010248906A JP2012101368A (en) | 2010-11-05 | 2010-11-05 | Method of vulcanizing tire |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010248906A JP2012101368A (en) | 2010-11-05 | 2010-11-05 | Method of vulcanizing tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2012101368A true JP2012101368A (en) | 2012-05-31 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2010248906A Pending JP2012101368A (en) | 2010-11-05 | 2010-11-05 | Method of vulcanizing tire |
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| JP (1) | JP2012101368A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015074202A (en) * | 2013-10-10 | 2015-04-20 | 住友ゴム工業株式会社 | Rigidity core for tire formation, and tire production method using the same |
| JP2016215583A (en) * | 2015-05-25 | 2016-12-22 | 住友ゴム工業株式会社 | Method for producing tire |
-
2010
- 2010-11-05 JP JP2010248906A patent/JP2012101368A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2015074202A (en) * | 2013-10-10 | 2015-04-20 | 住友ゴム工業株式会社 | Rigidity core for tire formation, and tire production method using the same |
| JP2016215583A (en) * | 2015-05-25 | 2016-12-22 | 住友ゴム工業株式会社 | Method for producing tire |
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