JP2008044155A - Tire vulcanizing/molding mold - Google Patents

Tire vulcanizing/molding mold Download PDF

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JP2008044155A
JP2008044155A JP2006220031A JP2006220031A JP2008044155A JP 2008044155 A JP2008044155 A JP 2008044155A JP 2006220031 A JP2006220031 A JP 2006220031A JP 2006220031 A JP2006220031 A JP 2006220031A JP 2008044155 A JP2008044155 A JP 2008044155A
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tire
mold
vent hole
circumferential direction
sector
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JP4845638B2 (en
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Masaki Hyodo
昌樹 兵頭
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Toyo Tire Corp
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Toyo Tire and Rubber Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a tire vulcanizing/molding mold which can dissolve a fault caused by drill breakage by preventing the deformation of a vent hole. <P>SOLUTION: In the tire vulcanizing/molding mold in which an annular mold part 1 contacting the tread part of the tire is formed by combining sectors 5 divided in the tire circumferential direction, the vent hole 8 is formed in each of recesses 6 for molding a land part formed in the inner circumference surface 1a of the annular mold part 1, and the central position of the vent holes 8a and 8b nearest to a sector end E1 is separated by at least 5 mm in the tire circumferential direction from the sector end E1. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、タイヤを加硫成形するためのタイヤ加硫成形型に関し、詳しくは、タイヤのトレッド部に当接する環状型部がタイヤ周方向に分割されたセクターの組み合わせからなるタイヤ加硫成形型に関する。   The present invention relates to a tire vulcanization mold for vulcanizing a tire, and more specifically, a tire vulcanization mold comprising a combination of sectors in which an annular mold portion that abuts a tread portion of a tire is divided in the tire circumferential direction. About.

タイヤを加硫成形するためのタイヤ加硫成形型は、複数の型部を組み合わせて構成されており、その分割形態に基づいて２ピースタイプとセグメンテッドタイプとに大別される。図７に例示した２ピースタイプの成形型は、断面略Ｌ字型をなす下型部３１と上型部３２とを備え、タイヤＴ１のトレッド部Ｔｒ１に当接する部分がタイヤ幅方向に分割されている。なお、タイヤＴ１は、その内周側に配されたブラダー（不図示）を膨張させることにより、成形型の内周面に密着する。   A tire vulcanization mold for vulcanizing a tire is configured by combining a plurality of mold parts, and is roughly classified into a two-piece type and a segmented type based on the division form. The two-piece type mold illustrated in FIG. 7 includes a lower mold portion 31 and an upper mold portion 32 having a substantially L-shaped cross section, and a portion that contacts the tread portion Tr1 of the tire T1 is divided in the tire width direction. ing. The tire T1 is in close contact with the inner peripheral surface of the mold by inflating a bladder (not shown) disposed on the inner peripheral side thereof.

一方、図８に例示したセグメンテッドタイプの成形型は、タイヤＴ２のサイドウォール部ＳＷに当接する下型部４１及び上型部４２と、トレッド部Ｔｒ２に当接する環状型部４４とを備える。環状型部４４は、タイヤ周方向に分割された複数のセクター４３の組み合わせからなり、各セクター４３はタイヤ径方向に変位可能に構成されている。型開き状態にある上型部４２とセクター４３は、下型部４１に近接するように下降し、更にセクター４３がタイヤ径方向内側に移動することにより型締め状態となる。   On the other hand, the segmented type mold illustrated in FIG. 8 includes a lower mold part 41 and an upper mold part 42 that abut on the sidewall part SW of the tire T2, and an annular mold part 44 that abuts on the tread part Tr2. The annular mold portion 44 is composed of a combination of a plurality of sectors 43 divided in the tire circumferential direction, and each sector 43 is configured to be displaceable in the tire radial direction. The upper mold part 42 and the sector 43 in the mold open state are lowered so as to be close to the lower mold part 41, and further, the sector 43 is moved to the inside in the tire radial direction to be in a mold clamping state.

環状型部４４の内周面には陸部成形用の凹部が複数設けられており、これによってタイヤＴ２のトレッド面に種々のトレッドパターンが形成される。また、凹部の各々には、エアを排出するためのベントホールが設けられており、加硫成形時には凹部内にゴムを円滑に流入せしめて、ベアと呼ばれる凹み傷の発生を防止するように構成されている。なお、エアはゴム流れによって凹部の隅部へと押し込まれる傾向にあるため、上記ベントホールは凹部の隅部に配置されるのが一般的である。   A plurality of land-forming concave portions are provided on the inner peripheral surface of the annular mold portion 44, whereby various tread patterns are formed on the tread surface of the tire T2. Also, each of the recesses is provided with a vent hole for discharging air, and the rubber is smoothly allowed to flow into the recess during vulcanization molding to prevent the occurrence of a dent scratch called a bear. Has been. Since the air tends to be pushed into the corners of the recesses by the rubber flow, the vent holes are generally arranged at the corners of the recesses.

ところで、セグメンテッドタイプの成形型においては、上述のようにセクターがタイヤ径方向内側に変位して環状に連なることで型締め状態となるが、このとき各セクターの端面同士が圧接することにより、セクター端近傍に設けられているベントホールが変形することがあった。そのため、成形型の清掃時において、変形により楕円になったベントホールに掃除用の錐を挿入した際に錐折れが発生することがあり、折れた錐の抜き取り修理が必要になるという問題があった。   By the way, in the segmented type molding die, as described above, the sector is displaced inward in the tire radial direction and is in a mold-clamping state by being annularly connected, but at this time, the end faces of each sector are in pressure contact with each other, The vent hole provided near the sector edge sometimes deformed. For this reason, when cleaning the mold, when a cleaning cone is inserted into the bent vent hole, the cone may be broken, and it is necessary to remove and repair the broken cone. It was.

なお、下記特許文献１〜３には、環状型部がタイヤ周方向に分割されたセクターの組み合わせからなるタイヤ加硫成形型が記載されているが、これらは何れも上記のようなベントホールの変形を防止する技術を開示するものではない。
特開平１−２９６８６号公報 特開平４−３４１８０６号公報 特開２００５−１７８１２１号公報 The following Patent Documents 1 to 3 describe tire vulcanization molds composed of a combination of sectors in which the annular mold part is divided in the tire circumferential direction. It does not disclose a technique for preventing deformation.
JP-A-1-29686 JP-A-4-341806 JP 2005-178121 A

本発明は上記実情に鑑みてなされたものであり、その目的は、ベントホールの変形を防止して錐折れによる不具合を解消することができるタイヤ加硫成形型を提供することにある。   The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a tire vulcanization mold that can prevent deformation of a vent hole and eliminate problems due to cone breakage.

上記目的は、下記の如き本発明により達成できる。即ち、本発明に係るタイヤ加硫成形型は、少なくともタイヤのトレッド部に当接する環状型部が、タイヤ周方向に分割されたセクターの組み合わせからなるタイヤ加硫成形型において、前記環状型部の内周面に形成されている陸部成形用の凹部の各々にベントホールが設けられているとともに、セクター端に最も近いベントホールの中心位置が、そのセクター端からタイヤ周方向に５ｍｍ以上離れているものである。   The above object can be achieved by the present invention as described below. That is, the tire vulcanization mold according to the present invention includes a tire vulcanization mold in which at least an annular mold portion that contacts the tread portion of the tire is a combination of sectors divided in the tire circumferential direction. A vent hole is provided in each of the land forming recesses formed on the inner peripheral surface, and the center position of the vent hole closest to the sector end is separated from the sector end by 5 mm or more in the tire circumferential direction. It is what.

本発明に係るタイヤ加硫成形型によれば、環状型部の内周面に形成されている凹部の各々に設けられたベントホールのうち、セクター端に最も近いベントホールの中心位置が、そのセクター端からタイヤ周方向に５ｍｍ以上離れていることにより、各セクターの端面同士の圧接によってベントホールが変形することを抑制でき、清掃時における錐折れの発生を防ぐことができる。   According to the tire vulcanization mold according to the present invention, among the vent holes provided in each of the recesses formed on the inner peripheral surface of the annular mold portion, the center position of the vent hole closest to the sector end is By being separated from the sector edge by 5 mm or more in the tire circumferential direction, it is possible to suppress the deformation of the vent hole due to the pressure contact between the end faces of each sector, and it is possible to prevent the occurrence of cone breakage during cleaning.

上記において、前記環状型部の内周面に、同一形状の前記凹部がタイヤ周方向に配列されており、その全周に亘って前記凹部の同一部位となる隅部に前記ベントホールが設けられているものが好ましい。   In the above, the concave portions having the same shape are arranged in the tire circumferential direction on the inner peripheral surface of the annular mold portion, and the vent hole is provided in a corner portion that is the same portion of the concave portion over the entire circumference. Are preferred.

上記構成によれば、タイヤ周方向に配列された凹部の全周に亘って、その凹部の同一部位となる隅部にベントホールが設けられていることにより、凹部内のエアが効果的に排出され、ベアの発生を良好に防止することができる。なお、セクター端を定める分割線は、直線、曲線又はそれらの組み合わせにより構成することができ、上述したようにベントホールとの間に所定以上の間隔を設けた位置に設定される。また、タイヤのトレッド面の各陸部には、ベントホールにゴムが流入することによって形成された微小突起（ベントスピュー）が残置されるが、上記構成によれば、このベントスピューの形成箇所が全周に亘って陸部の同一部位となるため、タイヤ新品時の外観が良好となる。   According to the above configuration, the vent holes are provided in the corners that are the same part of the recesses over the entire circumference of the recesses arranged in the tire circumferential direction, so that the air in the recesses is effectively discharged. Thus, the occurrence of bears can be prevented satisfactorily. The dividing line that defines the sector edge can be constituted by a straight line, a curved line, or a combination thereof, and is set at a position having a predetermined interval or more between the vent hole as described above. Also, in each land portion of the tread surface of the tire, a minute protrusion (bent spew) formed by the rubber flowing into the vent hole is left, but according to the above configuration, the formation location of the vent spew is Since it becomes the same site | part of a land part over the perimeter, the external appearance at the time of a tire new article becomes favorable.

以下、本発明の実施の形態について図面を参照しながら説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

［第１実施形態］
図１は、本発明の第１実施形態に係るタイヤ加硫成形型の一例を示す縦断面図であり、型締め状態を示している。図中において、グリーンタイヤ（不図示）はタイヤ軸方向が上下になるようにセットされる。即ち、図１の上下方向がタイヤ幅方向となり、同じく右方向がタイヤ径方向内側、左方向がタイヤ径方向外側となる。 [First Embodiment]
FIG. 1 is a longitudinal sectional view showing an example of a tire vulcanization mold according to the first embodiment of the present invention, and shows a clamped state. In the figure, a green tire (not shown) is set so that the tire axial direction is up and down. That is, the vertical direction in FIG. 1 is the tire width direction, and the right direction is the inside in the tire radial direction and the left direction is the outside in the tire radial direction.

このタイヤ加硫成形型（以下、単に成形型と称する場合がある。）は、タイヤのトレッド部が当接する環状型部１と、下方のサイドウォール部が当接する下型部２と、上方のサイドウォール部が当接する上型部３とを備える。下型部２及び上型部３のタイヤ径方向内側にはビードリング４が設けられており、タイヤのビードコアを嵌合可能に構成されている。   The tire vulcanization mold (hereinafter sometimes simply referred to as a mold) includes an annular mold portion 1 with which a tread portion of a tire abuts, a lower mold portion 2 with which a lower sidewall portion abuts, and an upper mold portion 1 And an upper mold part 3 with which the sidewall part abuts. A bead ring 4 is provided on the inner side in the tire radial direction of the lower mold part 2 and the upper mold part 3, and is configured to be able to fit a bead core of the tire.

環状型部１は、図２に示すように、タイヤ周方向に分割されたセクター５の組み合わせからなる。本実施形態では環状型部１が７分割され、各セクター５の周長が略同等である例を示すが、本発明では環状型部１の分割数は特に限られるものではなく、各セクター５の周長は互いに異なっていても構わない。   As shown in FIG. 2, the annular mold portion 1 is composed of a combination of sectors 5 divided in the tire circumferential direction. In the present embodiment, an example is shown in which the annular mold part 1 is divided into seven parts and the circumferences of the sectors 5 are substantially equal. However, in the present invention, the number of divisions of the annular mold part 1 is not particularly limited. The perimeters may be different from each other.

図１に示すように、環状型部１はコンテナー２１の側面に、下型部２はプレート状のコンテナー２２の上面に、上型部３はプレート状のコンテナー２３の下面にそれぞれ取り付けられている。コンテナー２１は、分割されたセクター５ごとに設けられており、昇降可能に構成されたコンテナー２３の下面に、タイヤ径方向に沿って摺動可能に取り付けられている。   As shown in FIG. 1, the annular mold 1 is attached to the side surface of the container 21, the lower mold part 2 is attached to the upper surface of the plate-like container 22, and the upper mold part 3 is attached to the lower surface of the plate-like container 23. . The container 21 is provided for each of the divided sectors 5, and is attached to the lower surface of the container 23 configured to be movable up and down so as to be slidable along the tire radial direction.

コンテナー２１のタイヤ径方向外側の斜面には摺動レール２５が設けられており、コンテナー２４がその傾斜方向に沿って摺動可能に嵌合されている。コンテナー２４は、ガイドプレート２７に昇降自在に取り付けられたアーム２６により支持されていて、コンテナー２４はコンテナー２３に対して相対的に昇降可能に構成されている。   A slide rail 25 is provided on a slope of the container 21 on the outer side in the tire radial direction, and the container 24 is slidably fitted along the slope direction. The container 24 is supported by an arm 26 attached to the guide plate 27 so as to be movable up and down, and the container 24 is configured to be movable up and down relative to the container 23.

したがって、図１に示す状態からコンテナー２４を上昇することで、コンテナー２１をタイヤ径方向外側に移動させ、各セクター５を下型部２及び上型部３から離間することができ、更にコンテナー２３を上昇することで、セクター５及び上型部３を下型部２から離間して、型開き状態に移行することができる。型開き状態から型締め状態への移行は、上記動作を逆に行えばよい。型締め状態では、各セクター５の端面同士が圧接されて円環状に連ねられる。   Therefore, by raising the container 24 from the state shown in FIG. 1, the container 21 can be moved outward in the tire radial direction, and each sector 5 can be separated from the lower mold part 2 and the upper mold part 3. Is raised, the sector 5 and the upper mold part 3 can be separated from the lower mold part 2 and shifted to the mold open state. The transition from the mold opening state to the mold clamping state may be performed by reversing the above operation. In the mold-clamping state, the end faces of the sectors 5 are brought into pressure contact with each other and are linked in an annular shape.

図３は、本発明の第１実施形態に係るタイヤ加硫成形型が備える環状型部の内周面を示す正面図であり、図４はその要部拡大図である。環状型部１の内周面１ａには、陸部成形用の凹部６と溝部成形用の凸部７とが設けられており、これらの形状に対応したトレッドパターンがタイヤのトレッド面に形成される。   FIG. 3 is a front view showing an inner peripheral surface of an annular mold part provided in the tire vulcanization mold according to the first embodiment of the present invention, and FIG. 4 is an enlarged view of a main part thereof. The inner peripheral surface 1a of the annular mold portion 1 is provided with a land-forming concave portion 6 and a groove-forming convex portion 7, and a tread pattern corresponding to these shapes is formed on the tread surface of the tire. The

本実施形態では、タイヤ赤道線に対応するセンターラインＣのタイヤ幅方向両外側に、平行四辺形をなすセンターブロックを成形するための凹部６ａ、６ｂがタイヤ周方向に沿って配列されている。また、凹部６ｂのタイヤ幅方向外側には、ショルダーブロックを成形するための凹部６ｃがタイヤ周方向に沿って配列されている。凹部６及び凸部７は、センターラインＣに関して対称的に設けられている。   In the present embodiment, recesses 6a and 6b for forming a center block having a parallelogram shape are arranged along the tire circumferential direction on both outer sides in the tire width direction of the center line C corresponding to the tire equator line. Moreover, the recessed part 6c for shape | molding a shoulder block is arranged in the tire width direction outer side of the recessed part 6b along the tire circumferential direction. The concave portion 6 and the convex portion 7 are provided symmetrically with respect to the center line C.

凹部６の各々には複数のベントホール８が設けられており、加硫成形時に凹部６内のエアを排出するとともに凹部６内にゴムを円滑に流入せしめて、ベアの発生を防止するように構成されている。ベントホール８の直径としては１〜１．５ｍｍが例示される。   A plurality of vent holes 8 are provided in each of the recesses 6 so that air in the recesses 6 is discharged during vulcanization molding and rubber is allowed to flow smoothly into the recesses 6 to prevent the generation of bears. It is configured. Examples of the diameter of the vent hole 8 include 1 to 1.5 mm.

本発明では、凹部に設けられたベントホールのうち、セクター端に最も近いベントホールの中心位置が、そのセクター端からタイヤ周方向に５ｍｍ以上離れている。図３に示す範囲では、複数あるベントホール８のうち、セクター端Ｅ１に最も近いのはベントホール８ａ、８ｂであり、それらの中心とセクター端Ｅ１とのタイヤ周方向距離ｄが５ｍｍ以上に設定されている。これにより、各セクター５の端面同士の圧接によってベントホール８が変形することを抑制でき、清掃時における錐折れの発生を防ぐことができる。なお、セクター端Ｅ１以外のセクター端においても同様に構成することが好ましい。   In the present invention, among the vent holes provided in the recess, the center position of the vent hole closest to the sector end is separated from the sector end by 5 mm or more in the tire circumferential direction. In the range shown in FIG. 3, the vent holes 8a and 8b that are closest to the sector end E1 among the plurality of vent holes 8 are the tire circumferential direction distance d between the center and the sector end E1 set to 5 mm or more. Has been. Thereby, it can suppress that the vent hole 8 deform | transforms by the press-contact of the end surfaces of each sector 5, and generation | occurrence | production of the cone break at the time of cleaning can be prevented. It should be noted that the same configuration is preferable at the sector ends other than the sector end E1.

凹部６ａ、６ｂには、対角にある隅部と、中央部との３箇所にベントホール８が設けられている。加硫成形時のエアは、ゴム流れによって凹部６の隅部へと押し込まれる傾向にあるため、凹部６の隅部にベントホール８を配置することによりベアの発生を効果的に防止することができる。   In the recesses 6a and 6b, vent holes 8 are provided at three locations including a diagonal corner and a central portion. Since air at the time of vulcanization tends to be pushed into the corners of the recesses 6 by the rubber flow, it is possible to effectively prevent the occurrence of bears by arranging the vent holes 8 at the corners of the recesses 6. it can.

本実施形態では、同一形状の凹部６がタイヤ周方向に連続的に配列されている。そして、セクター端Ｅ１に最も近いベントホール８ａ、８ｂを除き、その全周に亘って凹部６の同一部位となる隅部にベントホール８が設けられている。即ち、凹部６が有する隅部の中で同じ位置となる隅部において、凹部６に対する位置（部位）が同一となる所にベントホール８が設けられている。   In the present embodiment, the recessed portions 6 having the same shape are continuously arranged in the tire circumferential direction. And the vent hole 8 is provided in the corner used as the same site | part of the recessed part 6 over the perimeter except the vent holes 8a and 8b nearest to the sector end E1. That is, the vent hole 8 is provided in the corner where the concave portion 6 has the same position (part) with respect to the concave portion 6 at the same corner.

セクター端Ｅ１が別箇所に配置される場合、このベントホール８ａ、８ｂについても、他のベントホールと同様に、凹部６ｂの同一部位となる隅部に設けられるのであるが（図４のベントホール８ａ´、８ｂ´参照）、距離ｄが５ｍｍ未満であると錐折れの発生原因となるため、それらのタイヤ周方向位置をずらしてセクター端Ｅ１との距離が確保されているのである。   When the sector end E1 is arranged at a different location, the vent holes 8a and 8b are also provided at the corners that are the same part of the recess 6b as in the other vent holes (the vent hole in FIG. 4). 8a ′ and 8b ′), and if the distance d is less than 5 mm, cone breakage occurs, and therefore the distance from the sector end E1 is secured by shifting the positions in the tire circumferential direction.

ベントホール８ａと仮想のベントホール８ａ´との中心間距離は１０ｍｍ以内であることが好ましく、ベントホール８ｂについても同様である。これが１０ｍｍを超えると、ベントホール８ａの設定位置が凹部６ｂの隅部から遠くなり、加硫成形時のエア抜き効果が低下する傾向にある。   The center-to-center distance between the vent hole 8a and the virtual vent hole 8a ′ is preferably within 10 mm, and the same applies to the vent hole 8b. If this exceeds 10 mm, the setting position of the vent hole 8a is far from the corner of the recess 6b, and the air bleeding effect at the time of vulcanization molding tends to decrease.

上記成形型の設計では、環状型部１の内周面１ａに形成される凹部６やベントホール８、並びに環状型部１をタイヤ周方向に分割するための分割線が設定されるが、分割線のおよその位置はコンテナーの仕様等の諸要因により定まる。また、成形型の加工性の観点から、分割線はタイヤ幅方向に沿った直線であることが望ましい。本実施形態では、かかる分割線が設定された際、その分割線に最も近いベントホール８ａ、８ｂの設定位置をタイヤ周方向にずらし、その中心位置が分割線からタイヤ周方向に５ｍｍ以上離れるように調整すればよく、それによってベントホールの変形を防止できる。   In the above design of the mold, the recess 6 and the vent hole 8 formed on the inner peripheral surface 1a of the annular mold part 1 and the dividing line for dividing the annular mold part 1 in the tire circumferential direction are set. The approximate position of the line is determined by factors such as the container specifications. Further, from the viewpoint of workability of the mold, it is desirable that the dividing line is a straight line along the tire width direction. In the present embodiment, when such a dividing line is set, the setting positions of the vent holes 8a and 8b closest to the dividing line are shifted in the tire circumferential direction, and the center position is separated from the dividing line by 5 mm or more in the tire circumferential direction. Therefore, the deformation of the vent hole can be prevented.

［第２実施形態］
第２実施形態は、セクターが以下の通りの構成である他は、第１実施形態と略同様の構成であるので、共通点を省略して主に相違点について説明する。なお、既出の部材や部位と同一のものについては、同一の符号を用いて説明する。 [Second Embodiment]
The second embodiment has substantially the same configuration as that of the first embodiment except that the sector has the following configuration. Therefore, common points will be omitted and differences will be mainly described. The same members and parts as those already described will be described using the same reference numerals.

図５は、本発明の第２実施形態に係るタイヤ加硫成形型が備える環状型部の内周面を示す正面図であり、図６はその要部拡大図である。本実施形態の環状型部１の内周面１ａには、凹部６と凸部７とが第１実施形態と同様に設けられているが、凹部６にはブロックにサイプを形成するためのブレード９が配設されている。   FIG. 5 is a front view showing an inner peripheral surface of an annular mold part provided in a tire vulcanization mold according to the second embodiment of the present invention, and FIG. 6 is an enlarged view of a main part thereof. A concave portion 6 and a convex portion 7 are provided in the inner peripheral surface 1a of the annular mold portion 1 of the present embodiment in the same manner as in the first embodiment, but the concave portion 6 has a blade for forming a sipe in the block. 9 is disposed.

本実施形態においても、セクター端に最も近いベントホールの中心位置が、そのセクター端からタイヤ周方向に５ｍｍ以上離れており、図６の距離ｄは５ｍｍ以上に設定されている。但し、本実施形態では、タイヤ周方向に配列された全ての凹部６において、その全周に亘って凹部６の同一部位となる隅部にベントホール８が設けられており、セクター端Ｅ２のように分割線がタイヤ幅方向に対して傾斜したり、セクター端Ｅ３のように分割線が湾曲したりすることで、ベントホール８との間隔が確保されている。   Also in this embodiment, the center position of the vent hole closest to the sector end is 5 mm or more away from the sector end in the tire circumferential direction, and the distance d in FIG. 6 is set to 5 mm or more. However, in this embodiment, in all the recesses 6 arranged in the tire circumferential direction, vent holes 8 are provided in the corners that are the same part of the recesses 6 over the entire circumference, like the sector end E2. In addition, the dividing line is inclined with respect to the tire width direction, or the dividing line is curved like the sector end E3, so that an interval from the vent hole 8 is secured.

これにより、全周に亘って凹部６の隅部にベントホール８が設けられ、ベアの発生を効果的に防止することができるとともに、ベントスピューの形成箇所が全周に亘ってブロックの同一部位となるため、タイヤ新品時の外観が良好となる。   As a result, vent holes 8 are provided in the corners of the recesses 6 over the entire circumference, and the occurrence of bears can be effectively prevented, and the bent spew is formed in the same part of the block over the entire circumference. Therefore, the appearance when the tire is new is improved.

上記成形型の設計では、環状型部１の内周面１ａに、同一形状の凹部６をタイヤ周方向に配列し、その全周に亘って凹部６の同一部位となる隅部にベントホール８を設定するステップの後、分割線が設定されるが、その分割線とベントホール８の中心位置とのタイヤ周方向距離は５ｍｍ以上離れるように調整される。その際、分割線は、セクター端Ｅ２、Ｅ３のように直線、曲線又はそれらの組み合わせにより構成することができる。   In the design of the molding die, the concave portions 6 having the same shape are arranged in the tire circumferential direction on the inner peripheral surface 1a of the annular mold portion 1, and the vent holes 8 are formed in the corner portions that are the same portions of the concave portions 6 over the entire circumference. After the step of setting, a dividing line is set, and the distance in the tire circumferential direction between the dividing line and the center position of the vent hole 8 is adjusted to be 5 mm or more. In this case, the dividing line can be configured by a straight line, a curved line, or a combination thereof like the sector ends E2 and E3.

［他の実施形態］
本発明では、セクターの形状や材質、環状型部の内周面の形状、成形型の開閉機構などは特に限られるものではないが、セクターの構成材料がアルミ等の比較的軟らかいものである場合に特に有用である。また、前述の実施形態では、ブロック基調のトレッドパターンが形成される例を示したが、これに代えてリブ基調としても構わない。 [Other Embodiments]
In the present invention, the shape and material of the sector, the shape of the inner peripheral surface of the annular mold part, the opening and closing mechanism of the molding die are not particularly limited, but the sector constituent material is relatively soft such as aluminum Is particularly useful. In the above-described embodiment, an example in which a block-based tread pattern is formed has been described, but a rib-based tone may be used instead.

本発明に係るタイヤ加硫成形型の一例を示す縦断面図1 is a longitudinal sectional view showing an example of a tire vulcanization mold according to the present invention. 環状型部の平面図Plan view of annular mold 本発明の第１実施形態に係るタイヤ加硫成形型が備える環状型部の内周面を示す正面図The front view which shows the internal peripheral surface of the cyclic | annular mold part with which the tire vulcanization molding die which concerns on 1st Embodiment of this invention is provided. 図３の要部拡大図3 is an enlarged view of the main part of FIG. 本発明の第２実施形態に係るタイヤ加硫成形型が備える環状型部の内周面を示す正面図The front view which shows the internal peripheral surface of the cyclic | annular mold part with which the tire vulcanization mold which concerns on 2nd Embodiment of this invention is provided. 図５の要部拡大図Enlarged view of the main part of FIG. ２ピースタイプの成形型を概略的に示す縦断面図Longitudinal sectional view schematically showing a two-piece mold セグメンテッドタイプの成形型を概略的に示す縦断面図Longitudinal sectional view schematically showing a segmented mold

符号の説明Explanation of symbols

１ 環状型部
１ａ 内周面
２ 下型部
３ 上型部
５ セクター
６ 凹部
７ 凸部
８ ベントホール
９ ブレード
Ｃ センターライン
Ｅ１ セクター端
Ｅ２ セクター端
Ｅ３ セクター端 1 annular mold part 1a inner peripheral surface 2 lower mold part 3 upper mold part 5 sector 6 concave part 7 convex part 8 vent hole 9 blade C center line E1 sector end E2 sector end E3 sector end

Claims (2)

少なくともタイヤのトレッド部に当接する環状型部が、タイヤ周方向に分割されたセクターの組み合わせからなるタイヤ加硫成形型において、
前記環状型部の内周面に形成されている陸部成形用の凹部の各々にベントホールが設けられているとともに、セクター端に最も近いベントホールの中心位置が、そのセクター端からタイヤ周方向に５ｍｍ以上離れていることを特徴とするタイヤ加硫成形型。 In the tire vulcanization mold comprising a combination of sectors divided at least in the tire circumferential direction, at least the annular mold portion that contacts the tread portion of the tire,
A vent hole is provided in each of the land forming concave portions formed on the inner peripheral surface of the annular mold portion, and the center position of the vent hole closest to the sector end is in the tire circumferential direction from the sector end. A tire vulcanization mold characterized by being 5 mm or more apart. 前記環状型部の内周面に、同一形状の前記凹部がタイヤ周方向に配列されており、その全周に亘って前記凹部の同一部位となる隅部に前記ベントホールが設けられている請求項１記載のタイヤ加硫成形型。   The concave portions having the same shape are arranged in the tire circumferential direction on the inner peripheral surface of the annular mold portion, and the vent hole is provided in a corner portion that is the same portion of the concave portion over the entire circumference. Item 1. A tire vulcanization mold according to Item 1.
JP2006220031A 2006-08-11 2006-08-11 Tire vulcanization mold Expired - Fee Related JP4845638B2 (en)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011088415A (en) * 2009-10-26 2011-05-06 Toyo Tire & Rubber Co Ltd Tire mold and tire manufacturing method
WO2015082102A1 (en) * 2013-12-06 2015-06-11 Continental Reifen Deutschland Gmbh Vulcanizing mould for winter and all-season vehicle tyres, method for producing the vulcanizing mould and pneumatic vehicle tyre
JP2015193176A (en) * 2014-03-31 2015-11-05 東洋ゴム工業株式会社 Die and method for producing pneumatic tire
KR102277985B1 (en) * 2020-03-05 2021-07-15 넥센타이어 주식회사 Tread mold for manufacturing a tire
KR20220087984A (en) * 2020-12-18 2022-06-27 넥센타이어 주식회사 Tire curing mold and manufacturing method therefor

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JPH10315280A (en) * 1997-05-16 1998-12-02 Kanto Auto Works Ltd Air escape tool for injection molding tool
JP2002240042A (en) * 2001-02-15 2002-08-28 Bridgestone Corp Mold for vulcanizing and molding tire

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10315280A (en) * 1997-05-16 1998-12-02 Kanto Auto Works Ltd Air escape tool for injection molding tool
JP2002240042A (en) * 2001-02-15 2002-08-28 Bridgestone Corp Mold for vulcanizing and molding tire

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2011088415A (en) * 2009-10-26 2011-05-06 Toyo Tire & Rubber Co Ltd Tire mold and tire manufacturing method
WO2015082102A1 (en) * 2013-12-06 2015-06-11 Continental Reifen Deutschland Gmbh Vulcanizing mould for winter and all-season vehicle tyres, method for producing the vulcanizing mould and pneumatic vehicle tyre
US9895854B2 (en) 2013-12-06 2018-02-20 Continental Reifen Deutschland Gmbh Vulcanizing mold for winter and all-season vehicle tires and method for making the vulcanizing mold and pneumatic vehicle tire
JP2015193176A (en) * 2014-03-31 2015-11-05 東洋ゴム工業株式会社 Die and method for producing pneumatic tire
KR102277985B1 (en) * 2020-03-05 2021-07-15 넥센타이어 주식회사 Tread mold for manufacturing a tire
KR20220087984A (en) * 2020-12-18 2022-06-27 넥센타이어 주식회사 Tire curing mold and manufacturing method therefor
KR102437973B1 (en) * 2020-12-18 2022-09-01 넥센타이어 주식회사 Tire curing mold and manufacturing method therefor

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