JPH0342304A - Pneumatic radial tire - Google Patents
Pneumatic radial tireInfo
- Publication number
- JPH0342304A JPH0342304A JP2185056A JP18505690A JPH0342304A JP H0342304 A JPH0342304 A JP H0342304A JP 2185056 A JP2185056 A JP 2185056A JP 18505690 A JP18505690 A JP 18505690A JP H0342304 A JPH0342304 A JP H0342304A
- Authority
- JP
- Japan
- Prior art keywords
- tire
- mold
- sector
- molds
- lug
- 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
- 230000013011 mating Effects 0.000 claims description 10
- 238000004073 vulcanization Methods 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 239000000126 substance Substances 0.000 abstract 2
- 230000007547 defect Effects 0.000 description 2
- 230000002950 deficient Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 1
Landscapes
- Tires In General (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は割モールドで加硫製造するラジアルタイヤにお
いて、不良品を製造しない為のタイヤの溝底形状を有す
る空気入りラジアルタイヤに関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a pneumatic radial tire manufactured by vulcanization using a split mold and having a tire groove bottom shape to prevent the production of defective products.
（従来の技術）
従来ラジアルタイヤの加硫製造方法にはフルモールドを
使用する場合と割モールドを使用する場合の二種類の方
法が知られており、昨今のタイヤユニフォーミティ−向
上の目的から割モールドの使用が増加傾向にある。(Prior art) There are two known conventional vulcanization manufacturing methods for radial tires: one using a full mold and the other using a split mold. The use of molds is on the rise.
割モールドはタイヤウオール部に合致するサイドモール
ドとタイヤクラウン部に合致するセクターモールドによ
って構成され、加硫直前にセクターモールドがモールド
外方向よりタイヤ中心に向って移動し、サイドモールド
と合体し、一つのモールドを構成するものであり、一般
にセクターモールドとサイドモールドの合せ目はタイヤ
バットレス部に設けられる。The split mold is composed of a side mold that matches the tire wall part and a sector mold that matches the tire crown. Immediately before vulcanization, the sector mold moves from the outside of the mold toward the center of the tire, merges with the side mold, and forms a unit. Generally, the joint between the sector mold and the side mold is provided at the tire buttress.
（発明が解決しようとする問題点）
サイドモールドとセクターモールドの合体位置断面方向
にのびるラグ溝を有するタイヤを、このような割モール
ドで加硫する場合、加硫直前のセクターモールドとサイ
ドモールドの合体時に生タイヤの表面ゴムを前記モール
ド間に噛み込み噛み込んだゴムが加硫され、モールドに
付着すると繰返し堆積し、後々モールド内に落ち異物入
りとなり製造不良になる。(Problem to be Solved by the Invention) When vulcanizing a tire with lug grooves extending in the cross-sectional direction of a side mold and sector mold using such a split mold, the combination position of the sector mold and the side mold immediately before vulcanization is During assembly, the surface rubber of the raw tire is caught between the molds and the rubber is vulcanized, and when it adheres to the mold, it repeatedly accumulates and later falls into the mold, causing foreign matter to enter the mold and resulting in manufacturing defects.
噛み込みを防止する為には周方向合せ目上にラグ溝が入
らぬ用設計する方法があるが、セクターモールド移動可
能距離の制約から上記条件を満足させる為にラグｆ！ｔ
１１／ｉ面方向寸法に制約が生じる。In order to prevent jamming, there is a method of designing a lug groove that does not fit on the circumferential seam, but due to the restriction on the distance that the sector mold can move, in order to satisfy the above conditions, the lug f! t
11/There is a restriction on the dimension in the i-plane direction.
その場合−つはタイヤ外観の不良という問題があり、ラ
グ溝の本来の目的であるトラクション性確保上の障害と
なる問題等がある。In that case, there is a problem that the tire appearance is poor, and there are other problems such as impediments to securing traction, which is the original purpose of the lug grooves.
（問題を解決するための手段）
本発明は上記問題を解決する事を目的とし、その構成は
セクターモールドとサイドモールドの合せ日周方向のタ
イヤラグ溝底に凸状を設けたことを特徴とするものであ
る。(Means for Solving the Problems) The present invention aims to solve the above problems, and its configuration is characterized in that a convex shape is provided at the bottom of the tire lug groove in the diurnal direction of the combined sector mold and side mold. It is something.
１、割モールドを使用して加法製造するラジアルタイヤ
において、周方向に沿ってセクターモールドとサイドモ
ールドの合せ目部分が位置した際、そのタイヤラグの溝
底に凸状を設けたことを特徴とする空気入りラジアルタ
イヤ。1. A radial tire produced additively using a split mold is characterized by providing a convex shape at the groove bottom of the tire lug when the seam between the sector mold and the side mold is located along the circumferential direction. Pneumatic radial tire.
２、タイヤサイドウオール部に合致するサイドモールド
とタイヤクラウン部と合致し周辺で横断方向に分割され
た複数個のセクターモールドよりなる割モールドにより
製造され、
前記サイドモールドとセクターモールドの半径方向合せ
面は該当タイヤのトレッド端と該タイヤ最大幅との間に
在り、周状に連続した合せ面を有し、
前記タイヤは少なくとも前記サイドモールドとセクター
モールドの合せ面を含む範囲に半径方向に延びるラグ溝
を周状に間隔を置いて複数個配置してなる、
前記サイドモールドとセクターモールドの合せ面が前記
ラグ溝底を横断する位置において、前記合せ面に直接面
した凸起を少なくとも有することによって解決した。2. Manufactured by a split mold consisting of a side mold that matches the tire sidewall part and a plurality of sector molds that match the tire crown part and are divided in the transverse direction around the periphery, and the radial mating surface of the side mold and sector mold is located between the tread edge of the tire and the maximum width of the tire and has a circumferentially continuous mating surface, and the tire has lugs extending radially in a range that includes at least the mating surfaces of the side mold and the sector mold. A plurality of grooves are arranged circumferentially at intervals, and at least a protrusion directly faces the mating surface of the side mold and the sector mold at a position where the mating surface of the side mold and the sector mold crosses the bottom of the lug groove. Settled.
（作用）
上記の構成であるから、加硫直前のセクターモールドと
サイドモールド合体時にラグ溝底部において生タイヤは
凸起にそのトレッドゴムが吸収されるため突起以外に噛
み込む事がなくなる。(Function) With the above configuration, when the sector mold and side mold are combined immediately before vulcanization, the tread rubber of the green tire is absorbed by the protrusions at the bottom of the lug groove, so that it will not get caught in anything other than the protrusions.
従って本構成を用いればセクターモールドとサイドモー
ルドの合せ目位置が限定されず、ラグ溝本来の目的であ
るトラクション性を十分発揮し得る設計を実施出来、従
来の問題を解決することが出来る。Therefore, if this configuration is used, the position of the seam between the sector mold and the side mold is not limited, it is possible to implement a design that can fully exhibit the traction performance that is the original purpose of the lug groove, and the conventional problems can be solved.
何故凸起を設けることにより噛み込みが小となるかそれ
は凸起を設けることによりゴムがそこに流れて噛み込む
ゴムがなくなる為である。The reason why the presence of protrusions reduces the amount of biting is because by providing the protrusions, the rubber flows there and there is no more rubber to bite.
（実施例）
第１図は割りモールドの周方向半裁断面図である。１は
セクターモールド、２はサイドモールド３はセクターモ
ールドとサイドモールドの合せ目である。４はセクター
モールド１とサイドモールド２の合せ目に３に表面凸起
４及びラグ溝底６にラグ溝底凸状７を設ける。(Example) FIG. 1 is a circumferential half-sectional view of a split mold. 1 is a sector mold, 2 is a side mold, and 3 is a joint between the sector mold and the side mold. 4, a surface protrusion 4 is provided at the joint between the sector mold 1 and the side mold 2, and a lug groove bottom protrusion 7 is provided at the lug groove bottom 6.
形状、寸法は第２図で説明すると寸法はラグ溝深さｈ＝
６ｍｍに対し、凸状は高さ３ｍｍ、厚さ２ｍｍとしラグ
溝底幅内に設けた。又形状は第３４図に示すように矩形
でなくＲで形成させてもよい。The shape and dimensions are explained in Figure 2. The dimensions are lug groove depth h =
6 mm, the convex shape was 3 mm in height and 2 mm in thickness, and was provided within the width of the bottom of the lug groove. Further, the shape may be rounded instead of rectangular as shown in FIG. 34.
（効果） 本発明の効果について説明する。(effect) The effects of the present invention will be explained.
セクターモールドとサイドモールド合せ目に生タイヤを
噛み込むことがなくなり、製造不良をなくす事が出来る
と同時にトラクションを得るに必要なラグ設計が出来た
ことによりタイヤ性能を向上せしめた。This eliminates the possibility of raw tires getting caught in the joint between the sector mold and side mold, eliminating manufacturing defects and improving tire performance by creating the lug design necessary to obtain traction.
上記に示す様しこ本発明は不良率はＯになり、ワダチ脱
出性も良好である。As described above, the present invention has a defective rate of 0 and good rut escape property.
第１図は本発明の空気入りラジアルタイヤを製造するタ
イヤモールドの周方向１部半裁断面図である。
第２．３．４図はそのモールドのセクターモールドとサ
イドモールドの合せ目部分の１部拡大図である。
第
図
第
図
第
一−７FIG. 1 is a circumferential half-section view of a tire mold for manufacturing the pneumatic radial tire of the present invention. FIG. 2.3.4 is a partially enlarged view of the joint between the sector mold and side mold of the mold. Figure Figure 1-7
Claims (2)
ヤにおいて、周方向に沿ってセクターモールドとサイド
モールドの合せ目部分が位置した際、そのタイヤラグの
溝底に凸状を設けたことを特徴とする空気入りラジアル
タイヤ。(1) In a radial tire manufactured by vulcanization using a split mold, a convex shape is provided at the groove bottom of the tire lug when the seam between the sector mold and the side mold is located along the circumferential direction. A pneumatic radial tire.
ドとタイヤクラウン部と合致し周辺で横断方向に分割さ
れた複数個のセクターモールドよりなる割モールドによ
り製造され、 前記サイドモールドとセクターモールドの半径方向合せ
面は該当タイヤのトレッド端と該タイヤ最大幅との間に
在り、周状に連続した合せ面を有し、 前記タイヤは少なくとも前記サイドモールドとセクター
モールドの合せ面を含む範囲に半径方向に延びるラグ溝
を周状に間隔を置いて複数個配置してなる、 前記サイドモールドとセクターモールドの合せ面が前記
ラグ溝底を横断する位置において、前記合せ面に直接面
した凸起を少なくとも有することを特徴とする空気入り
ラジアルタイヤ。(2) Manufactured by a split mold consisting of a side mold that matches the tire sidewall and a plurality of sector molds that match the tire crown and are divided in the transverse direction at the periphery, and the side mold and sector mold are aligned in the radial direction. The surface is located between the tread edge of the tire and the maximum width of the tire, and has a circumferentially continuous mating surface, and the tire extends radially in an area that includes at least the mating surfaces of the side mold and the sector mold. A plurality of lug grooves are arranged circumferentially at intervals, and the mating surface of the side mold and the sector mold has at least a protrusion directly facing the mating surface at a position where the mating surface crosses the bottom of the lug groove. A pneumatic radial tire featuring
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2185056A JPH0753482B2 (en) | 1990-07-12 | 1990-07-12 | Pneumatic radial tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2185056A JPH0753482B2 (en) | 1990-07-12 | 1990-07-12 | Pneumatic radial tires |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0342304A true JPH0342304A (en) | 1991-02-22 |
| JPH0753482B2 JPH0753482B2 (en) | 1995-06-07 |
Family
ID=16164035
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2185056A Expired - Lifetime JPH0753482B2 (en) | 1990-07-12 | 1990-07-12 | Pneumatic radial tires |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0753482B2 (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62156949A (en) * | 1985-12-28 | 1987-07-11 | 電気化学工業株式会社 | Heat-resistant composite polypropylene sheet |
| JPH1076527A (en) * | 1996-09-05 | 1998-03-24 | Bridgestone Corp | Mold for tire vulcanization and tire manufacture by the mold |
| JP2006264494A (en) * | 2005-03-23 | 2006-10-05 | Bridgestone Corp | Pneumatic tire for two-wheeler |
| JP2007210248A (en) * | 2006-02-10 | 2007-08-23 | Bridgestone Corp | Mold for vulcanizing tire and pneumatic tire |
| JP2008213773A (en) * | 2007-03-07 | 2008-09-18 | Bridgestone Corp | Pneumatic tire and vulcanization molding device for manufacturing the same |
| JP2012139898A (en) * | 2010-12-28 | 2012-07-26 | Sumitomo Rubber Ind Ltd | Tire vulcanizing mold and motorcycle tire |
| CN113226721A (en) * | 2019-02-01 | 2021-08-06 | 横滨橡胶株式会社 | Method for manufacturing pneumatic tire |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS47641U (en) * | 1970-11-23 | 1972-08-04 | ||
| JPS5658817A (en) * | 1979-10-18 | 1981-05-22 | Bridgestone Corp | Dividing method of ring shaped metal mold and cutting apparatus therefor |
| JPS5830722U (en) * | 1981-10-20 | 1983-02-28 | トヨタ自動車株式会社 | Control device for water-cooled intercooler |
-
1990
- 1990-07-12 JP JP2185056A patent/JPH0753482B2/en not_active Expired - Lifetime
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS47641U (en) * | 1970-11-23 | 1972-08-04 | ||
| JPS5658817A (en) * | 1979-10-18 | 1981-05-22 | Bridgestone Corp | Dividing method of ring shaped metal mold and cutting apparatus therefor |
| JPS5830722U (en) * | 1981-10-20 | 1983-02-28 | トヨタ自動車株式会社 | Control device for water-cooled intercooler |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS62156949A (en) * | 1985-12-28 | 1987-07-11 | 電気化学工業株式会社 | Heat-resistant composite polypropylene sheet |
| JPH058097B2 (en) * | 1985-12-28 | 1993-02-01 | Denki Kagaku Kogyo Kk | |
| JPH1076527A (en) * | 1996-09-05 | 1998-03-24 | Bridgestone Corp | Mold for tire vulcanization and tire manufacture by the mold |
| JP2006264494A (en) * | 2005-03-23 | 2006-10-05 | Bridgestone Corp | Pneumatic tire for two-wheeler |
| JP4732776B2 (en) * | 2005-03-23 | 2011-07-27 | 株式会社ブリヂストン | Pneumatic tires for motorcycles |
| JP2007210248A (en) * | 2006-02-10 | 2007-08-23 | Bridgestone Corp | Mold for vulcanizing tire and pneumatic tire |
| JP2008213773A (en) * | 2007-03-07 | 2008-09-18 | Bridgestone Corp | Pneumatic tire and vulcanization molding device for manufacturing the same |
| JP2012139898A (en) * | 2010-12-28 | 2012-07-26 | Sumitomo Rubber Ind Ltd | Tire vulcanizing mold and motorcycle tire |
| CN113226721A (en) * | 2019-02-01 | 2021-08-06 | 横滨橡胶株式会社 | Method for manufacturing pneumatic tire |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0753482B2 (en) | 1995-06-07 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| R250 | Receipt of annual fees |
Free format text: JAPANESE INTERMEDIATE CODE: R250 |
|
| R250 | Receipt of annual fees |
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|
| R250 | Receipt of annual fees |
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| EXPY | Cancellation because of completion of term |