JP2002264145A - Pneumatic tire and mold for vulcanizing and molding the same - Google Patents
Pneumatic tire and mold for vulcanizing and molding the sameInfo
- Publication number
- JP2002264145A JP2002264145A JP2001064304A JP2001064304A JP2002264145A JP 2002264145 A JP2002264145 A JP 2002264145A JP 2001064304 A JP2001064304 A JP 2001064304A JP 2001064304 A JP2001064304 A JP 2001064304A JP 2002264145 A JP2002264145 A JP 2002264145A
- Authority
- JP
- Japan
- Prior art keywords
- mold
- tire
- vent
- pneumatic tire
- vulcanization
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D30/00—Producing pneumatic or solid tyres or parts thereof
- B29D30/06—Pneumatic tyres or parts thereof (e.g. produced by casting, moulding, compression moulding, injection moulding, centrifugal casting)
- B29D30/0601—Vulcanising tyres; Vulcanising presses for tyres
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
-
- 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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/10—Moulds or cores; Details thereof or accessories therefor with incorporated venting means
-
- 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
- B29D30/0606—Vulcanising moulds not integral with vulcanising presses
- B29D2030/0607—Constructional features of the moulds
- B29D2030/0617—Venting devices, e.g. vent plugs or inserts
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】この発明は、空気入りタイヤ
及び空気入りタイヤの加硫成形用金型に係わり、更に詳
しくは成形タイヤの故障本数を低減させることが出来る
と共に、金型のベントホールに対する加硫時の詰まりを
無くしてメンテナンス回数を低減させることを可能とし
た空気入りタイヤ及び空気入りタイヤの加硫成形用金型
に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pneumatic tire and a mold for vulcanization molding of a pneumatic tire, and more particularly, to a method for reducing the number of failures of a molded tire and reducing the number of mold holes. The present invention relates to a pneumatic tire and a mold for vulcanization molding of a pneumatic tire, which can reduce clogging during vulcanization and reduce the number of maintenance operations.
【０００２】[0002]
【従来の技術】一般に、タイヤ加硫成形用金型には、加
硫時に未加硫タイヤ（グリーンタイヤ）と金型との間の
エアーや、加硫時に発生するガス等を抜くために、ベン
トホールと呼称される気抜き穴（以下ベントホールと言
う）が多数形成されている。2. Description of the Related Art In general, a tire vulcanization mold is used to remove air between an unvulcanized tire (green tire) and the mold during vulcanization and gas generated during vulcanization. A large number of vent holes (hereinafter referred to as vent holes) called vent holes are formed.
【０００３】前記未加硫タイヤと金型との間に、エアー
や加硫時に発生したガスが残った状態で加硫した場合
に、エアー溜まり，またはガス溜まりによりタイヤ表面
に凹部ができ、これが製品タイヤの故障（一般にライト
故障と言われている）の原因となっている。When vulcanization is performed with air or gas generated during vulcanization remaining between the unvulcanized tire and the mold, a recess is formed on the tire surface due to air accumulation or gas accumulation. This is the cause of product tire failure (generally referred to as light failure).
【０００４】ところで、金型に加工した多数のベントホ
ールには、加硫時にエアーやガスが抜けた後に溶融した
ゴムが流れ込み、これが図６に示すように、加硫成形後
のタイヤＷの表面に多数のひげ状の突起物Ｓ（一般にス
ピューと呼称され、以下スピューと言う）として形成さ
れる。By the way, molten rubber flows after air or gas is released during vulcanization and flows into a large number of vent holes machined into a mold, as shown in FIG. Are formed as a number of whisker-like projections S (generally referred to as spews, hereinafter referred to as spews).
【０００５】従って、加硫成形後のタイヤＷの表面、特
に踏面部Ｗａに形成されたスピューＳは、タイヤの外観
向上等の目的から専用の機械等で除去する作業を行って
おり、またスピューＳの除去を容易にするためと外観向
上等の目的から、前記ベントホールの内径を細くして対
応している。[0005] Therefore, the spew S formed on the surface of the tire W after vulcanization molding, especially on the tread portion Wa, is removed by a dedicated machine or the like for the purpose of improving the appearance of the tire. The inside diameter of the vent hole is reduced for the purpose of facilitating the removal of sulfur and improving the appearance.
【０００６】[0006]
【発明が解決しようとする課題】然しながら、ベントホ
ールの径を細くし、タイヤＷの表面に形成されるスピュ
ーＳを小径のものにしようとした場合、加硫後に金型か
らタイヤＷを離型させる際、スピューＳの引っ張り強度
がベントホールの内面との摩擦係数に対して不足し、タ
イヤ離型時にスピューＳが途中から切れてしまい、スピ
ューＳの一部がベントホール内に残ってしまう。その結
果、ベントホールが詰まり、加硫時にはエアーや加硫時
に発生したガスが排出されずに、上記のようなタイヤの
ライト故障が発生する。However, if the diameter of the vent hole is reduced and the diameter of the spew S formed on the surface of the tire W is reduced, the tire W is released from the mold after vulcanization. At this time, the tensile strength of the spew S is insufficient with respect to the coefficient of friction with the inner surface of the vent hole, and the spew S is cut off from the middle when releasing the tire, and a part of the spew S remains in the vent hole. As a result, the vent holes are clogged, and air or gas generated during vulcanization is not discharged during vulcanization, and the above-described tire light failure occurs.
【０００７】従って、このようなライト故障が起こらな
いようにするために、金型内面のクリーニングやベント
ホールを細いドリル等を用いて短期間にメンテナンスを
する必要があり、このためタイヤ加硫の生産性を向上さ
せることが出来ないと言う問題があった。Therefore, in order to prevent such a light failure from occurring, it is necessary to clean the inner surface of the mold and perform maintenance of the vent hole using a thin drill or the like in a short period of time. There was a problem that productivity could not be improved.
【０００８】この発明の目的は、ベントホールの詰まり
を防止してタイヤ加硫の生産性を向上させることが出来
ると共に、メンテナンスを低減させ、製品タイヤの故障
本数を低減させることが出来る空気入りタイヤ及び空気
入りタイヤの加硫成形用金型を提供することにある。SUMMARY OF THE INVENTION It is an object of the present invention to prevent the clogging of a vent hole, improve the productivity of tire vulcanization, reduce maintenance, and reduce the number of failures in product tires. And a mold for vulcanization molding of a pneumatic tire.
【０００９】この発明は上記目的を達成するため、この
発明の空気入りタイヤは、加硫成形後の空気入りタイヤ
のショルダー部及びサイド部に、先端から基端部にかけ
て横断面積が大きくなるひげ状の突起物を形成したこと
を要旨とするものである。In order to achieve the above object, the present invention provides a pneumatic tire having a whisker-like shape in which the cross-sectional area increases from the tip to the base end in the shoulder and side portions of the pneumatic tire after vulcanization molding. The gist of the present invention is that the protrusion is formed.
【００１０】このように、ベントホールには、離型時に
切断された突起物が残ることがなく、ベントホールを詰
まらせることがないので、タイヤ加硫の生産性を向上さ
せることが出来るものである。[0010] As described above, since the projections cut at the time of mold release do not remain in the vent hole and the vent hole is not clogged, the productivity of tire vulcanization can be improved. is there.
【００１１】また、この発明の空気入りタイヤの加硫成
形用金型は、空気入りタイヤの加硫成形用金型に形成さ
れたベントホール内に、中心部に貫通穴を備えたベント
ピースを埋設して成る加硫成形用金型であって、前記ベ
ントピースは、長手方向を熱膨張率の異なる少なくとも
二種類以上の耐熱性非接着材料で段階的または直線的に
形成し、前記ベントホール内に、ベントピースを前記加
硫成形用金型の内側が熱膨張率が小さくなるように位置
させて埋設したことを要旨とするものである。The vulcanization mold for a pneumatic tire according to the present invention is provided with a vent piece having a through hole at the center in a vent hole formed in the vulcanization mold for a pneumatic tire. A vulcanization molding die embedded therein, wherein the vent piece is formed in a longitudinal direction in a stepwise or linear manner with at least two or more kinds of heat-resistant non-adhesive materials having different coefficients of thermal expansion; The gist of the invention is that a vent piece is buried inside the vulcanizing mold so that the inside of the vulcanizing mold has a small coefficient of thermal expansion.
【００１２】このように、金型のベントホール内に、長
手方向を熱膨張率の異なる耐熱性非接着材料で段階的ま
たは直線的に形成したベントピースを加硫成形用金型の
内側が熱膨張率が小さくなるように位置させて埋設した
ことで、タイヤ離型時に、ベントホール内にひげ状の突
起物の切断片が残ることなく完全に離脱させることが出
来、この結果、ベントホールが詰まることがなく、金型
のメンテナンスの回数を低減させ、製品タイヤの故障本
数を低減させることが出来る。As described above, the inside of the mold for vulcanization molding has a vent piece in which the longitudinal direction is formed stepwise or linearly with a heat-resistant non-adhesive material having a different coefficient of thermal expansion in the longitudinal direction. By embedding and locating so that the coefficient of expansion is small, when the tire is released, it can be completely removed without leaving a cut piece of a whisker-like projection in the vent hole. Without clogging, the number of mold maintenances can be reduced, and the number of product tire failures can be reduced.
【００１３】[0013]
【発明の実施の形態】以下、添付図面に基づきこの発明
の実施の形態を説明する。Embodiments of the present invention will be described below with reference to the accompanying drawings.
【００１４】なお、従来例と同一構成要素は、同一符号
を付して説明は省略する。The same components as those in the conventional example are denoted by the same reference numerals, and description thereof is omitted.
【００１５】図１は、この発明の一実施形態を示すタイ
ヤ加硫成形用の分割金型の一部縦断斜視図を示し、この
金型１のタイヤ踏面部（トレッド部）を成形する部分に
は、多数の分割されたピース２が配設され、このピース
２の側面と、タイヤＷのショルダー部及びサイド部を成
形する金型部分３には、未加硫タイヤ（グリーンタイ
ヤ）と金型１との間のエアーや、加硫時に発生するガス
等を抜くための多数のベントホール４が形成されてい
る。FIG. 1 is a perspective view, partially in section, of a split mold for vulcanizing a tire according to an embodiment of the present invention, and shows a portion of the mold 1 where a tire tread portion (tread portion) is formed. Is provided with a number of divided pieces 2, and an unvulcanized tire (green tire) and a mold are provided on a side surface of the piece 2 and a mold portion 3 for molding a shoulder portion and a side portion of the tire W. A large number of vent holes 4 are formed for extracting air between them and gas generated during vulcanization.
【００１６】このベントホール４は、成形するタイヤの
金型により異なるが、この発明の実施形態では、内径Ｄ
が1.0 mm〜3.0mm の円筒状の貫通孔が金型内面側１ａか
ら背面側１ｂまで形成され、このベントホール４は、金
型内面側１ａを大径に形成すると共に、これに連続して
金型１の背面側１ｂが小径となるように段状に形成し、
この段差部４ａに後述する２段構成の耐熱性非接着材料
５ａ，５ｂから成る円筒状のベントピース５が係止でき
る構造になっている。The vent hole 4 varies depending on the mold of the tire to be molded, but in the embodiment of the present invention, the inner diameter D
Is formed from the inner surface 1a of the mold to the rear surface 1b, and the vent hole 4 forms the inner surface 1a of the mold to have a large diameter and is continuously connected to the through hole. The mold 1 is formed stepwise so that the back side 1b has a small diameter,
The stepped portion 4a has a structure in which a cylindrical vent piece 5 made of a heat-resistant non-adhesive material 5a, 5b of a two-stage configuration described later can be locked.
【００１７】この発明の実施形態では、特にタイヤのシ
ョルダー部及びサイド部を成形する金型部分３のベント
ホール４に、図１及び図２に示すように、長手方向を熱
膨張率の異なる２段構成の耐熱性非接着材料５ａ，５ｂ
から成るベントピース５が埋設されている。In the embodiment of the present invention, in particular, as shown in FIGS. 1 and 2, a vent hole 4 of a mold portion 3 for molding a shoulder portion and a side portion of a tire has two different thermal expansion coefficients in the longitudinal direction. Heat-resistant non-adhesive materials 5a, 5b in a step configuration
Is embedded.
【００１８】前記ベントーピース５は、この実施形態で
は、前記ベントホール４に嵌合するように、外径1.0 mm
〜3.0mm 、中心部の貫通孔６の内径が、1.0mm 以下、好
ましくは、0.5mm 〜0.8mm 、全長が8.0mm 〜15mmの円筒
状に形成され、前記耐熱性非接着材料５ａ，５ｂとして
は、ステンレス等の金属、セラミックス、PTFE等の樹脂
材料、鉱石のうちの何れかから選ばれた少なくとも一つ
以上の材料、またはこれらを組み合わせて構成するもの
である。In this embodiment, the bento piece 5 has an outer diameter of 1.0 mm so as to fit into the vent hole 4.
The heat-resistant non-adhesive material 5a, 5b is formed in a cylindrical shape having an inner diameter of 1.0 mm or less, preferably 0.5 mm to 0.8 mm, and a total length of 8.0 mm to 15 mm. Is composed of at least one material selected from metals such as stainless steel, ceramics, resin materials such as PTFE, ores, or a combination thereof.
【００１９】なお、この実施形態のベントーピース５で
は、熱膨張率が小さい耐熱性非接着材料５ａとして、金
属材料としてステンレス材料を使用し，また熱膨張率が
大きい耐熱性非接着材料５ｂとして、樹脂材料としてフ
ッ素系ポリテトラフルオロエチレン、またはパーフルオ
ロアロキシレジン等を使用しているが、特にこのような
材料には限定されるものではない。In the bento piece 5 of this embodiment, a stainless material is used as the metal material as the heat-resistant non-adhesive material 5a having a small coefficient of thermal expansion, and the heat-resistant non-adhesive material 5b having a large coefficient of thermal expansion is used. Fluorine-based polytetrafluoroethylene, perfluoroallox resin, or the like is used as the resin material, but is not particularly limited to such a material.
【００２０】更に、ベントーピース５の耐熱性非接着材
料５ａ，５ｂの熱膨張の比率としては、１〜３割程度の
相違した材料を組み合わせて使用することが好ましく、
熱膨張率が小さい耐熱性非接着材料５ａは、長さ2.0mm
〜5.0mm に形成すると共に、金型１の内面側１ａに位置
させ、熱膨張率が大きい耐熱性非接着材料５ｂは、ベン
トーピース５の全長（8.0mm 〜15mm）の５割以上に形成
すると共に、金型１の背面側１ｂとなるように位置させ
て埋設させるものである。Further, it is preferable to use a combination of different materials of about 10 to 30% in terms of the thermal expansion ratio of the heat-resistant non-adhesive materials 5a and 5b of the bento piece 5.
The heat-resistant non-adhesive material 5a having a small coefficient of thermal expansion has a length of 2.0 mm.
The heat-resistant non-adhesive material 5b having a large coefficient of thermal expansion and being formed on the inner surface side 1a of the mold 1 is formed to be 50% or more of the entire length (8.0 mm to 15 mm) of the bento piece 5. At the same time, it is positioned and embedded so as to be on the back side 1b of the mold 1.
【００２１】また、この実施形態のベントピース５は、
熱膨張率の異なる同径の耐熱性非接着材料５ａ，５ｂを
直列に二段構成として形成してあるが、二段以上の構成
にすることも可能であり、更に同一もしくは熱膨張率の
異なる耐熱性非接着材料５ａ，５ｂの肉厚を長手方向に
変化させて、加熱時に膨張率を変化させるように構成す
ることも可能である。The vent piece 5 of this embodiment is
The heat-resistant non-adhesive materials 5a and 5b having the same diameter and different thermal expansion coefficients are formed in a two-stage configuration in series. However, two or more stages can be used, and the same or different thermal expansion coefficients are also possible. The thickness of the heat-resistant non-adhesive materials 5a and 5b may be changed in the longitudinal direction so that the coefficient of expansion is changed at the time of heating.
【００２２】以上のように、金型１のベントホール４を
構成することで、常温時には図２に示すように、ベント
ピース５の耐熱性非接着材料５ａ，５ｂの貫通孔６の内
径は同一径となっていても、加硫時には図３に示すよう
に、耐熱性非接着材料５ａ，５ｂの熱膨張率の差によっ
て、貫通孔６の内径は図の鎖線に示すように、金型１の
背面側１ｂに行くに従って小径（細径）となる。By forming the vent hole 4 of the mold 1 as described above, the inner diameter of the through hole 6 of the heat-resistant non-adhesive material 5a, 5b of the vent piece 5 is the same at normal temperature as shown in FIG. Even when the diameter is the same, the inner diameter of the through-hole 6 is reduced by the difference in the coefficient of thermal expansion between the heat-resistant non-adhesive materials 5a and 5b as shown in FIG. The diameter becomes smaller (smaller diameter) as it goes to the back side 1b.
【００２３】この結果、加硫時にタイヤＷのショルダー
部及びサイド部Ｗｂに形成されるひげ状の突起物Ｓ（ス
ピューＳ）は、図４及び図５に示すように、先端から基
端部にかけて横断面積が拡大する、換言すれば先端が細
く、基端部が太い突起物Ｓとなる。As a result, as shown in FIGS. 4 and 5, the whiskers-like projections S (Spyu S) formed on the shoulder portions and the side portions Wb of the tire W during vulcanization, extend from the distal end to the proximal end. The cross-sectional area becomes larger, in other words, the projection S becomes thinner at the tip and thicker at the base end.
【００２４】従って、金型１から加硫成形されたタイヤ
Ｗを離型させる際、突起物Ｓの引っ張り強度がベントホ
ール４の内面との摩擦係数に対して不足することがなく
なり、タイヤ離型時に突起物Ｓが途中から切れてしまう
と言う問題も解消され、突起物Ｓの一部がベントホール
６内に残ってしまうと言うこともなくなるため、ベント
ホール６が詰まりもなくなり、加硫時にはエアーや加硫
時に発生したガスは確実に排気され、タイヤのライト故
障等も確実に防止させることが出来る。Therefore, when the vulcanized tire W is released from the mold 1, the tensile strength of the projections S is not insufficient for the coefficient of friction with the inner surface of the vent hole 4, so that the tire release Sometimes, the problem that the protrusion S is cut off in the middle is also solved, and it is no longer possible to say that a part of the protrusion S remains in the vent hole 6, so that the vent hole 6 is not clogged. Air and gas generated during vulcanization are reliably exhausted, and tire light failure and the like can be reliably prevented.
【００２５】なお、この実施形態では、タイヤの加硫成
形用金型について説明したが、このような金型に限定さ
れず、樹脂材料の成形型や、食品類の型等、あらゆる成
形型に応用することも可能である。In this embodiment, a mold for vulcanization molding of a tire has been described. However, the present invention is not limited to such a mold, and it is applicable to all molds such as resin material molds and food molds. It is also possible to apply.
【００２６】[0026]
【発明の効果】この発明は、上記のように加硫成形後の
空気入りタイヤのショルダー部及びサイド部に、先端か
ら基端部にかけて横断面積が大きくなるひげ状の突起物
を形成したので、タイヤのショルダー部及びサイド部に
は、離型時に切断されない突起物が残り、ベントホール
を詰まらせることがないので、タイヤ加硫の生産性を向
上させることが出来る効果がある。As described above, according to the present invention, a beard-shaped protrusion having a cross-sectional area that increases from the distal end to the proximal end is formed on the shoulder portion and the side portion of the pneumatic tire after vulcanization molding. Since protrusions that are not cut at the time of mold release remain on the shoulder portion and the side portion of the tire and do not clog the vent hole, there is an effect that the productivity of tire vulcanization can be improved.
【００２７】また、空気入りタイヤの加硫成形用金型に
形成されたベントホール内に、中心部に貫通穴を備えた
ベントピースを埋設して成る加硫成形用金型であって、
前記ベントピースは、長手方向を熱膨張率の異なる少な
くとも二種類以上の耐熱性非接着材料で段階的または直
線的に形成し、前記ベントホール内に、ベントピースを
前記加硫成形用金型の内側が熱膨張率が小さくなるよう
に位置させて埋設したので、金型のベントホール内に、
長手方向を熱膨張率の異なる耐熱性非接着材料で段階的
または直線的に形成したベントピースを加硫成形用金型
の内側が熱膨張率が小さくなるように位置させて埋設し
たことで、タイヤ離型時に、ベントホール内にひげ状の
突起物の切断片が残ることなく完全に離脱させることが
出来、この結果、ベントホールが詰まることがなく、金
型のメンテナンスの回数をを低減させ、製品タイヤの故
障本数を低減させることが出来る効果がある。[0027] A vulcanization molding die in which a vent piece having a through hole at the center is embedded in a vent hole formed in the vulcanization molding die of a pneumatic tire,
The vent piece is formed stepwise or linearly in the longitudinal direction with at least two or more kinds of heat-resistant non-adhesive materials having different coefficients of thermal expansion, and in the vent hole, the vent piece is formed of the vulcanization mold. Since the inner side was buried by positioning it so that the coefficient of thermal expansion was small, in the vent hole of the mold,
By burying the vent piece formed longitudinally or linearly with a heat-resistant non-adhesive material having a different coefficient of thermal expansion in the longitudinal direction so that the inside of the vulcanization molding die has a smaller coefficient of thermal expansion, When the tire is released, the beard-shaped protrusions can be completely removed without leaving any cut pieces in the vent hole.As a result, the vent hole is not clogged, and the number of mold maintenance operations can be reduced. This has the effect of reducing the number of product tire failures.
【図面の簡単な説明】[Brief description of the drawings]
【図１】この発明の一実施形態を示すタイヤ加硫成形用
の分割金型の一部縦断斜視図である。FIG. 1 is a partially longitudinal perspective view of a split mold for vulcanizing a tire according to an embodiment of the present invention.
【図２】この発明の常温時におけるベントホール内に埋
設されたベントピースの断面図である。FIG. 2 is a sectional view of a vent piece buried in a vent hole at normal temperature according to the present invention.
【図３】この発明の加硫時におけるベントホール内に埋
設されたベントピースの断面図である。FIG. 3 is a cross-sectional view of a vent piece buried in a vent hole during vulcanization according to the present invention.
【図４】この発明の一実施形態を示すタイヤ加硫成形用
金型で成形されたタイヤの断面図である。FIG. 4 is a cross-sectional view of a tire molded by a tire vulcanization mold according to an embodiment of the present invention.
【図５】タイヤのショルダー部及びサイド部に形成され
たひげ状の突起物の拡大断面図である。FIG. 5 is an enlarged sectional view of a beard-shaped protrusion formed on a shoulder portion and a side portion of the tire.
【図６】従来のタイヤ加硫成形用金型で成形されたタイ
ヤの断面図である。FIG. 6 is a cross-sectional view of a tire molded by a conventional tire vulcanization mold.
１ 金型 １ａ 金型内面側 １ｂ 背面側 ２ ピース ３ 金型部分 ４ ベントホール ４ａ 段差部 ５ ベントピース ５ａ，５ｂ 耐熱性非接着
材料 ６ 貫通孔 Ｗ タイヤ Ｗａ ショルダー部及びサイド部 Ｓ ひげ状の突
起物（スピュー）DESCRIPTION OF SYMBOLS 1 Die 1a Die inner side 1b Back side 2 piece 3 Die part 4 Vent hole 4a Step 5 Vent piece 5a, 5b Heat resistant non-adhesive material 6 Through hole W Tire Wa Shoulder part and side part S Beard projection Thing (Spyu)
───────────────────────────────────────────────────── フロントページの続き (72)発明者 藤野 純一 愛知県新城市野田字古屋敷１番地 横浜ゴ ム株式会社新城工場内 Ｆターム(参考） 4F202 AG28 AH20 CA21 CU07 4F203 AG28 AH20 DA11 DB01 DC01 DJ31 DL15 ────────────────────────────────────────────────── ─── Continuing from the front page (72) Inventor Junichi Fujino No. 1 Furuyashiki, Noda-shi, Shinshiro-shi, Aichi F-term in the Shinshiro factory of Yokohama Rubber Co., Ltd. (reference) 4F202 AG28 AH20 CA21 CU07 4F203 AG28 AH20 DA11 DB01 DC01 DJ31 DL15
Claims (7)
ー部及びサイド部に、先端から基端部にかけて横断面積
が拡大するひげ状の突起物を一体的に形成して成る空気
入りタイヤ。1. A pneumatic tire in which a whisker-like projection whose cross-sectional area increases from a tip to a base is integrally formed on a shoulder portion and a side portion of a vulcanized pneumatic tire.
されたベントホール内に、中心部に貫通穴を備えたベン
トピースを埋設して成る加硫成形用金型であって、 前記ベントピースは、長手方向を熱膨張率の異なる少な
くとも二種類以上の耐熱性非接着材料で段階的または直
線的に形成し、前記ベントホール内に、ベントピースを
前記加硫成形用金型の内側が熱膨張率が小さくなるよう
に位置させて埋設して成る空気入りタイヤの加硫成形用
金型。2. A vulcanization mold comprising a vent hole formed in a vulcanization mold of a pneumatic tire and a vent piece having a through hole at a center portion embedded therein. The vent piece is formed stepwise or linearly in the longitudinal direction with at least two or more kinds of heat-resistant non-adhesive materials having different coefficients of thermal expansion, and inside the vent hole, the vent piece is formed inside the vulcanization mold. For vulcanization molding of a pneumatic tire, which is embedded so as to have a small coefficient of thermal expansion.
に形成すると共に、これに連続して成形用金型の背面側
を小径となるように段状に形成した請求項２に記載の空
気入りタイヤの加硫成形用金型。3. The vent hole according to claim 2, wherein the inner surface of the mold has a large diameter, and the vent hole is formed in a step-like shape so that the rear surface of the mold has a small diameter. For vulcanization molding of pneumatic tires.
ラミックス、樹脂材料、鉱石のうちの何れかから選ばれ
た少なくとも一つ以上の材料である請求項２または３に
記載の空気入りタイヤの加硫成形用金型。4. The pneumatic tire according to claim 2, wherein the heat-resistant non-adhesive material is at least one material selected from the group consisting of metal materials, ceramics, resin materials, and ores. For vulcanization molding.
金属材料または樹脂材料で形成する請求項２，３または
４に記載の空気入りタイヤの加硫成形用金型。5. The mold for vulcanization molding of a pneumatic tire according to claim 2, wherein the vent piece is formed of a metal material or a resin material having different coefficients of thermal expansion.
金属材料と樹脂材料とを組み合わせて形成した請求項
２，３または４に記載の空気入りタイヤの加硫成形用金
型。6. The mold for vulcanization molding of a pneumatic tire according to claim 2, wherein the vent piece is formed by combining a metal material and a resin material having different coefficients of thermal expansion.
に向かって肉厚を変化させ、長さ方向において熱膨張率
が異なるように構成した請求項２，３，４，５または６
に記載の空気入りタイヤの加硫成形用金型。7. The vent piece according to claim 2, wherein the thickness of the vent piece is changed from one end to the other end so that the coefficient of thermal expansion differs in the length direction.
5. A mold for vulcanization molding of a pneumatic tire according to item 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001064304A JP4367600B2 (en) | 2001-03-08 | 2001-03-08 | Mold for vulcanization molding of pneumatic tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001064304A JP4367600B2 (en) | 2001-03-08 | 2001-03-08 | Mold for vulcanization molding of pneumatic tires |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002264145A true JP2002264145A (en) | 2002-09-18 |
| JP4367600B2 JP4367600B2 (en) | 2009-11-18 |
Family
ID=18923138
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001064304A Expired - Fee Related JP4367600B2 (en) | 2001-03-08 | 2001-03-08 | Mold for vulcanization molding of pneumatic tires |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4367600B2 (en) |
Cited By (8)
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|---|---|---|---|---|
| JP2007062235A (en) * | 2005-09-01 | 2007-03-15 | Toyo Tire & Rubber Co Ltd | Pneumatic tire |
| JP2009018509A (en) * | 2007-07-12 | 2009-01-29 | Yokohama Rubber Co Ltd:The | Bead-ring |
| JP2009068620A (en) * | 2007-09-14 | 2009-04-02 | Toyo Tire & Rubber Co Ltd | Vibration control bush |
| JP2010222004A (en) * | 2010-06-02 | 2010-10-07 | Sumitomo Rubber Ind Ltd | Pneumatic tire and method for manufacturing the same |
| JP2015101051A (en) * | 2013-11-27 | 2015-06-04 | 東洋ゴム工業株式会社 | Tire-vulcanizing mold and method for producing tire |
| 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 |
| KR102291739B1 (en) * | 2020-05-14 | 2021-08-23 | 넥센타이어 주식회사 | Maintain Gastight Type Tire vulcanization cure Mold Nased On Thermal Expansion |
| CN113692340A (en) * | 2019-04-16 | 2021-11-23 | 株式会社普利司通 | Exhaust vent cleaning device and exhaust vent cleaning method |
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| CN113692340B (en) * | 2019-04-16 | 2023-04-25 | 株式会社普利司通 | Exhaust hole cleaning device and exhaust hole cleaning method |
| KR102291739B1 (en) * | 2020-05-14 | 2021-08-23 | 넥센타이어 주식회사 | Maintain Gastight Type Tire vulcanization cure Mold Nased On Thermal Expansion |
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|---|---|
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