JPS6169438A - Manufacture of read apex - Google Patents
Manufacture of read apexInfo
- Publication number
- JPS6169438A JPS6169438A JP59193565A JP19356584A JPS6169438A JP S6169438 A JPS6169438 A JP S6169438A JP 59193565 A JP59193565 A JP 59193565A JP 19356584 A JP19356584 A JP 19356584A JP S6169438 A JPS6169438 A JP S6169438A
- Authority
- JP
- Japan
- Prior art keywords
- bead
- bead apex
- apex
- tire
- end part
- 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)
- B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
- B29D30/50—Covering, e.g. by winding, the separate bead-rings or bead-cores with textile material, e.g. with flipper strips
-
- 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)
- B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
- B29D2030/481—Fillers or apexes
-
- 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)
- B29D30/48—Bead-rings or bead-cores; Treatment thereof prior to building the tyre
- B29D2030/482—Applying fillers or apexes to bead cores
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Tires In General (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、タイヤの構成材料であるビードエイペックス
の製法に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for manufacturing bead apex, which is a constituent material of tires.
（従来技術）
例えば自動二輪車用ラジアルタイヤのビード部付近には
、硬質ゴム製のビードエイペックスが埋設されているも
のが多い。このビードエイペックスは、ビードコアの部
分からサイドウオール方向に厚さを漸減して伸びる補強
材で、これを埋設しておくことにより、タイヤの横剛性
を強化することができるものである。(Prior Art) For example, in many radial tires for motorcycles, a bead apex made of hard rubber is buried near the bead portion. The bead apex is a reinforcing material that gradually decreases in thickness from the bead core toward the sidewall, and by embedding this reinforcing material, it is possible to strengthen the lateral rigidity of the tire.
近年、大型のタイヤ用として大寸法のビードエイペック
スに対する需要が高まっているが、均一性に富んだ大寸
法のビードエイペックスの製造は一般に難しく、シワの
発生等によってタイヤの均一性を損うことが多かった。In recent years, demand for large-sized bead apex for large tires has increased, but it is generally difficult to manufacture large-sized bead apex with high uniformity, and the uniformity of the tire is impaired due to wrinkles, etc. There were many things.
（発明の目的）
この発明は、均一性の高い大型のビードエイペックスを
比較的容易に製造することのできる製法を提供すること
を目的としている。(Objective of the Invention) An object of the present invention is to provide a manufacturing method that can relatively easily manufacture a large bead apex with high uniformity.
（発明の構成）
本発明にかかるビードエイペックスの製法は、タイヤの
ビードコアからサイドウオール方向に厚さを漸減して伸
びるビードエイペックスのうち。(Structure of the Invention) The method for manufacturing a bead apex according to the present invention is a bead apex that extends from the bead core of a tire in the direction of the sidewall with its thickness gradually decreasing.
ビードコア側の部分と先端側の部分とを別個に成形し、
しかるのち両者を接合一体化して所定の寸法をもつビー
ドエイペックスとすることを特徴としている。The bead core side part and the tip side part are molded separately,
The feature is that the two are then joined together to form a bead apex having predetermined dimensions.
（実施例）
以下１本発明の実施例を図面に基いて具体的に説明する
。(Example) An example of the present invention will be specifically described below with reference to the drawings.
第１図は本発明によって製造したビードエイペックスを
そなえたタイヤの１例をあられす断面図であって、この
タイヤ１のビード部２には、ビードコア３と、このビー
ドコア３からサイドウオール部４方向に伸びるビードエ
イペックス５が埋設されている。FIG. 1 is a cross-sectional view of an example of a tire equipped with a bead apex manufactured according to the present invention.The bead portion 2 of this tire 1 includes a bead core 3, and a sidewall portion 4 extending from the bead core 3. A bead apex 5 extending in the direction is buried.
と−ドエイペックス５は、ビードコア３側の部分である
基部５ａと、この基部５ａから上方（クラウン側）に伸
びる先端側の部分である端部５ｂとを接合一体化してな
る６図示例では、基部５ａはビードコア３と一体化され
ている。ビードエイペックス５の材質は硬質ゴムであり
、その好ましいＪＩＳ硬度は６５°〜９５°の範囲であ
る。このビードエイペックス５は、前述の如くビードコ
ア３からサイ′ ドウオール方向に厚さを漸減して
伸びているが、タイヤの補強効果を高めるため、その先
端がサイドウオール部４の最大幅の部分付近に達するよ
うにしておくのが好ましい。The apex 5 is formed by joining and integrating a base portion 5a, which is a portion on the bead core 3 side, and an end portion 5b, which is a portion on the tip side extending upward (to the crown side) from the base portion 5a. 5a is integrated with the bead core 3. The material of the bead apex 5 is hard rubber, and its preferred JIS hardness is in the range of 65° to 95°. As mentioned above, this bead apex 5 extends from the bead core 3 in the sidewall direction with its thickness gradually decreasing, but in order to enhance the reinforcing effect of the tire, its tip is located near the maximum width part of the sidewall portion 4. It is preferable to keep it so that it reaches .
ヒードエイペ・ンクス５の外側にはカーカスプライアの
折返し部７ａ、７ｂが位置している。この折返し部７ａ
、？ｂのビードベース部からの高さＨａ、Ｈｂは、サイ
ドウオール部４の最大幅位置の高さＨのそれぞれ５５〜
６５％及び７０〜１００％の範囲にあることが好ましい
０図中９はトレッド部である。The folded parts 7a and 7b of the carcass pliers are located on the outside of the heat ape chain 5. This folded part 7a
,? The heights Ha and Hb from the bead base part of b are 55 to 55, respectively, of the height H at the maximum width position of the sidewall part 4.
The tread portion is preferably 65% and 70 to 100%.
このビードエイペックス５は、具体的には例えば次のよ
うにして製造される。先ず、基部５ａとなる断面三角形
の帯状ゴムを例えば押出成形法により成形し、ビードコ
ア３の外周部に付着させる。Specifically, this bead apex 5 is manufactured, for example, as follows. First, a rubber band having a triangular cross section, which will become the base portion 5a, is molded by, for example, extrusion molding, and is attached to the outer periphery of the bead core 3.
これによって、第２図（ａ）に示すような断面形状の帯
状の第１部材１０が得られる。つぎに、同様な方法で同
図（ｂ）に示す断面形状の第２部材すなわち端部５ｂを
成形し、しかるのちタイヤの一次成形工程において両者
をタイヤに組み込む。この工程では、第３図（ａ）に示
す如くドラム状の成形フォーマ１１の外周面上に貼着し
たカーカスプライア上に第２部材である端部５ｂをその
接合部Ｊを外側に向けて配し、外側に上記第１部材１０
をその接合部Ｊ′が前記Ｊに臨むように配してカーカス
プライの巻上げを行なう、このとき、第１部材１０の基
部５ａと、第２部材である端部５ｂとがＪ、Ｊ′におい
て重なり合うので、両者を貼り合わせる。これによって
基部５ａと端部５ｂとが一体化し、所望の形状寸法のビ
ードエイペックス５が得られるのである。As a result, a strip-shaped first member 10 having a cross-sectional shape as shown in FIG. 2(a) is obtained. Next, the second member, that is, the end portion 5b having the cross-sectional shape shown in FIG. 2(b) is molded in the same manner, and then both are assembled into the tire in the tire primary molding process. In this step, as shown in FIG. 3(a), the end portion 5b, which is the second member, is placed on the carcass pliers attached to the outer peripheral surface of the drum-shaped forming former 11, with the joint portion J thereof facing outward. and the first member 10 on the outside.
The carcass ply is wound up with the joint J' thereof facing J. At this time, the base part 5a of the first member 10 and the end part 5b of the second member are arranged at J and J'. They overlap, so glue them together. As a result, the base portion 5a and the end portion 5b are integrated, and a bead apex 5 having a desired shape and size is obtained.
このビードエイペックスの製法は、一つのビードエイペ
ックス５を２分して別個に成形し、しかるのち接合一体
化するものであるから、従来の方法よりも若干工程が長
くなるが、歪の生じやすい形状のものを分割して小寸法
で成形するので、シワ等が発生しに〈＜、均一性に富ん
だ製品が得られるという利点がある。ビードエイペック
ス５が大型である場合は、その効果が特に顕著である。This bead apex manufacturing method involves dividing one bead apex 5 into two parts, molding them separately, and then joining them together, so the process is slightly longer than the conventional method, but it reduces the possibility of distortion. Since a product with an easy-to-use shape is divided and molded into small sizes, there is an advantage that wrinkles do not occur and a product with high uniformity can be obtained. This effect is particularly significant when the bead apex 5 is large.
また、第１部材１０として、従来の小型のビードエイペ
ックスをそのまま用い、これに第２部材（５ｂ）を継ぎ
足して大型化することも可能である。Furthermore, it is also possible to use a conventional small-sized bead apex as it is as the first member 10 and enlarge it by adding the second member (5b) thereto.
例えば、＠２５ｍｔａの従来のビードエイペックス（Ｂ
Ａ−２５）に別途製作した第２部材を接合して、高さ６
０ｍｍの大型のビードエイペックスを得ることができ、
さらに＠４５■の従来のビードエイペックス（ＢＡ−４
５）に同じｍ２部材を接合して高さ８ｂｍの大型ビード
エイペックスを得ることもできる。For example, conventional bead apex (B
A-25) is joined with a separately manufactured second member, and the height is 6.
A large bead apex of 0mm can be obtained,
In addition, @45■ conventional bead apex (BA-4
A large bead apex with a height of 8 bm can also be obtained by joining the same m2 member to 5).
いずれの場合も、ビード製造工程は従来のものと同様で
よく、特別の改造は不要である。In either case, the bead manufacturing process may be the same as the conventional one, and no special modification is required.
（発明の効果）
以上に説明した如く１本発明にかかるビードエイペック
スの製法は、シワ等の発生の少ない均一性に富んだビー
ドエイペックスを容易に製造することができるすぐれた
ものである。(Effects of the Invention) As explained above, the method for producing a bead apex according to the present invention is excellent in that it can easily produce a highly uniform bead apex with few wrinkles and the like.
【図面の簡単な説明】
第１図は本発明の製法で製造されたビードエイペックス
をそなえたタイヤの断面図、第２図（ａ）。
（ｂ）は第１部材および第２部材の断面図、第３図（ａ
）、（ｂ）は製法の説明図である０図はいずれも実施例
に関するものである。
１・・・タイヤ、２・・・ビード部、３・・・ビードコ
ア、４・・・サイドウオール部、５・・・ど−ドエイペ
ックス、５ａ・・・基部、 ５ｂ・・・端部、１０・・
・第１部材、１１・・・フォーマ。
第１図
第２図BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view of a tire equipped with a bead apex manufactured by the manufacturing method of the present invention, and FIG. 2(a). (b) is a sectional view of the first member and the second member, and FIG.
) and (b) are explanatory diagrams of the manufacturing method, and Figure 0 relates to Examples. DESCRIPTION OF SYMBOLS 1... Tire, 2... Bead part, 3... Bead core, 4... Sidewall part, 5... Door apex, 5a... Base, 5b... End part, 10...・
- First member, 11...former. Figure 1 Figure 2
Claims (1)
さを漸減して伸びるビードエイペックスのうち、ビード
コア側の部分と先端側の部分とを別個に成形し、しかる
のち両者を接合一体化して所定の寸法をもつビードエイ
ペックスとすることを特徴とするタイヤのビードエイペ
ックスの製法。(1) Of the bead apex, which extends from the bead core of the tire to the sidewall direction with its thickness gradually decreasing, the bead core side and tip side parts are molded separately, and then the two are joined and integrated to form a predetermined shape. A method for manufacturing a tire bead apex, which is characterized in that the bead apex has dimensions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59193565A JPS6169438A (en) | 1984-09-14 | 1984-09-14 | Manufacture of read apex |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59193565A JPS6169438A (en) | 1984-09-14 | 1984-09-14 | Manufacture of read apex |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6169438A true JPS6169438A (en) | 1986-04-10 |
| JPH0446220B2 JPH0446220B2 (en) | 1992-07-29 |
Family
ID=16310133
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59193565A Granted JPS6169438A (en) | 1984-09-14 | 1984-09-14 | Manufacture of read apex |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6169438A (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0610227A (en) * | 1991-11-26 | 1994-01-18 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire |
| EP0887210A3 (en) * | 1997-06-27 | 2000-11-22 | Sumitomo Rubber Industries Ltd. | Pneumatic tyre and method of manufacturing the same |
| WO2001039964A1 (en) * | 1999-12-06 | 2001-06-07 | The Goodyear Tire & Rubber Company | Compound apex for vehicle tire |
| WO2004113101A1 (en) * | 2003-06-17 | 2004-12-29 | The Yokohama Rubber Co.,Ltd. | Pneumatic tire |
| US6972061B1 (en) | 1999-12-06 | 2005-12-06 | The Goodyear Tire & Rubber Company | Compound apex for vehicle tire |
| JP2008514854A (en) * | 2004-10-01 | 2008-05-08 | クノル−ブレムゼ ジステーメ フューア ヌッツファールツォイゲ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method and apparatus for increasing the torque of a reciprocating internal combustion engine, in particular a diesel engine |
| JP2008120029A (en) * | 2006-11-15 | 2008-05-29 | Bridgestone Corp | Manufacturing method/device of pneumatic tire and pneumatic tire |
| JP2008151073A (en) * | 2006-12-19 | 2008-07-03 | Toyota Motor Corp | Gas supply device for internal combustion engine |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5878740A (en) * | 1981-11-02 | 1983-05-12 | Sumitomo Rubber Ind Ltd | Method and apparatus for manufacturing tire |
| JPS6092103A (en) * | 1983-10-25 | 1985-05-23 | Yokohama Rubber Co Ltd:The | Radial tire for passenger car |
-
1984
- 1984-09-14 JP JP59193565A patent/JPS6169438A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5878740A (en) * | 1981-11-02 | 1983-05-12 | Sumitomo Rubber Ind Ltd | Method and apparatus for manufacturing tire |
| JPS6092103A (en) * | 1983-10-25 | 1985-05-23 | Yokohama Rubber Co Ltd:The | Radial tire for passenger car |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0610227A (en) * | 1991-11-26 | 1994-01-18 | Sumitomo Rubber Ind Ltd | Pneumatic radial tire |
| EP0887210A3 (en) * | 1997-06-27 | 2000-11-22 | Sumitomo Rubber Industries Ltd. | Pneumatic tyre and method of manufacturing the same |
| WO2001039964A1 (en) * | 1999-12-06 | 2001-06-07 | The Goodyear Tire & Rubber Company | Compound apex for vehicle tire |
| US6972061B1 (en) | 1999-12-06 | 2005-12-06 | The Goodyear Tire & Rubber Company | Compound apex for vehicle tire |
| WO2004113101A1 (en) * | 2003-06-17 | 2004-12-29 | The Yokohama Rubber Co.,Ltd. | Pneumatic tire |
| JP2005007961A (en) * | 2003-06-17 | 2005-01-13 | Yokohama Rubber Co Ltd:The | Pneumatic tire |
| JP2008514854A (en) * | 2004-10-01 | 2008-05-08 | クノル−ブレムゼ ジステーメ フューア ヌッツファールツォイゲ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method and apparatus for increasing the torque of a reciprocating internal combustion engine, in particular a diesel engine |
| JP4696119B2 (en) * | 2004-10-01 | 2011-06-08 | クノル−ブレムゼ ジステーメ フューア ヌッツファールツォイゲ ゲゼルシャフト ミット ベシュレンクテル ハフツング | Method and apparatus for increasing the torque of a reciprocating internal combustion engine, in particular a diesel engine |
| JP2008120029A (en) * | 2006-11-15 | 2008-05-29 | Bridgestone Corp | Manufacturing method/device of pneumatic tire and pneumatic tire |
| JP2008151073A (en) * | 2006-12-19 | 2008-07-03 | Toyota Motor Corp | Gas supply device for internal combustion engine |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0446220B2 (en) | 1992-07-29 |
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