JPH03178427A - Manufacture of pneumatic tire - Google Patents

Manufacture of pneumatic tire

Info

Publication number
JPH03178427A
JPH03178427A JP1316391A JP31639189A JPH03178427A JP H03178427 A JPH03178427 A JP H03178427A JP 1316391 A JP1316391 A JP 1316391A JP 31639189 A JP31639189 A JP 31639189A JP H03178427 A JPH03178427 A JP H03178427A
Authority
JP
Japan
Prior art keywords
carcass
tire
carcass material
cord
cords
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
Application number
JP1316391A
Other languages
Japanese (ja)
Other versions
JP2741085B2 (en
Inventor
Noboru Nagumo
登 南雲
Isamu Irie
入江 勇
Noboru Okada
昇 岡田
Koji Abe
阿部 幸二
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Yokohama Rubber Co Ltd
Original Assignee
Yokohama Rubber Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Yokohama Rubber Co Ltd filed Critical Yokohama Rubber Co Ltd
Priority to JP1316391A priority Critical patent/JP2741085B2/en
Publication of JPH03178427A publication Critical patent/JPH03178427A/en
Application granted granted Critical
Publication of JP2741085B2 publication Critical patent/JP2741085B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Abstract

PURPOSE:To improve the uniformity and appearance of tire and make its bumpy ply side smaller by a method wherein carcass material is wound round a forming drum in order to lap or abut both end parts over or against each other after both the end parts of the portion, which at least contains cords of the carcass material, are irradiated by ionizing radiation. CONSTITUTION:Sheet-like carcass material 6, on one end of which a lug part 3 made only of coating rubber 5, is produced by irradiating ionizing radiation over both end parts of the portion A, in which at least cords 4 are imbedded, of sheet-like carcass material 1, which is formed by arranging the cords 4 and covering them by coating rubber 5, and being cut in the predetermined lengths (l). The material 6 is wound round a forming drum 9 so as to lap the portions treated with radiation over each other in order to form a cylindrical carcass 11. Both side parts of the carcass 11 are drawn so as to installed annular beads 13 respectively at drawn parts 12. After that, a cap tread 20 is laminated to the middle part and side treads 16 are laminated to both the side parts of the outer periphery of the resultant cylindrical carcass material 11 in order to produce a green tire 21.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は空気入りタイヤの製造方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for manufacturing a pneumatic tire.

更に詳しくはユニフォミティの改善やタイヤ表面の改善
を図った空気入りタイヤの製造方法に関するものである
More specifically, the present invention relates to a method of manufacturing a pneumatic tire with improved uniformity and tire surface.

〔従来の技術〕[Conventional technology]

円筒状に形成されている空気入りタイヤにおいて、この
空気入りタイヤを構成するカーカスや、その内側のライ
ナーや、外側のキャップトレッドやサイドトレッド等は
、いずれもタイヤの製造時に帯状の材料を使用して形成
されている。すなわち、これらの帯状材料は、その両端
部同志を互いにラップさせるようにスプライスさせて円
筒状に形成されているのである。このようにして出来た
ラップ状のスプライス部はタイヤの周方向に厚い段差を
形成し、かつ剛性が他の部分より大きくなっている。し
たがって、このようなタイヤが回転すると、上記段差及
び剛性差に起因して周期的なラジアルフォースの変動(
RFV(ラジアル・フォース・バリエーション〉〕が生
ずることが避けられなかった。
In a cylindrical pneumatic tire, the carcass, inner liner, outer cap tread, side tread, etc. that make up this pneumatic tire are all made of strip-shaped material during tire manufacturing. It is formed by That is, these strip-shaped materials are formed into a cylindrical shape by splicing their ends so that they overlap each other. The lap-shaped splice portion created in this manner forms a thick step in the circumferential direction of the tire, and has greater rigidity than other portions. Therefore, when such a tire rotates, periodic radial force fluctuations (
The occurrence of RFV (Radial Force Variation) was unavoidable.

本発明者らは、上記RFVに影響を与える帯状のタイヤ
構成材料のうち、特にカーカスのスプライス部が及ぼす
影響は単に段差や剛性差によってRFVの増大をもたら
すだけでなく、次のようなタイヤ表面にかかわる問題も
招来することを知見した。
The present inventors found that among the belt-shaped tire constituent materials that affect RFV, the influence exerted by the splice part of the carcass not only increases RFV due to differences in level and rigidity, but also increases the tire surface as follows. It was discovered that problems related to this may also occur.

すなわち、カーカス材料は、コートゴムのゴム層内にコ
ードが埋設されて出来ている。そのため、シート状のカ
ーカス材料を成形ドラムに巻き付けて両端部をラップ状
にスプライスすると、コード同志が重なり、それが原因
となってタイヤの側面にバンピー・ブライ・サイド(B
That is, the carcass material is made up of cords embedded within the rubber layer of the coated rubber. Therefore, when a sheet of carcass material is wrapped around a forming drum and the ends are spliced into laps, the cords overlap, causing bumpy, briny sides on the side of the tire.
.

P、S)と称する青筋が立ったような膨らみができる。P, S) bulges that look like blue streaks appear.

また、加硫成形時にグリーンタイヤがブラダ−によって
金型内面にリフトされるとき、カーカスのスプライス部
に応力が集中し、スプライス部に隣接するカーカスコー
ドに乱れが発生し、これが原因でユニフォ藁ティ (U
F (RFV/LFV))が悪化するなどの問題もあっ
た。
In addition, when the green tire is lifted onto the inner surface of the mold by the bladder during vulcanization molding, stress concentrates on the splice part of the carcass, causing disorder in the carcass cord adjacent to the splice part, which causes the uniform straw tie. (U
There were also problems such as deterioration of F (RFV/LFV).

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

本発明はかかる従来の問題点に鑑みてなされたものであ
り、カーカス材料のスプライス部やカーカスコードの乱
れなどに起因するタイヤのユニフォミティ (UF)悪
化を解消すると共に、バンピーパブライ・サイド(B、
 P、 S)などのタイヤ表面の凹凸を解消した空気入
りタイヤの製造方法を提供することを目的とするもので
ある。
The present invention has been made in view of such conventional problems, and it solves the deterioration of tire uniformity (UF) caused by splices of carcass materials and irregularities of carcass cords, and also improves bumpy publid side (B). ,
It is an object of the present invention to provide a method for manufacturing a pneumatic tire that eliminates the unevenness of the tire surface such as P and S).

〔課題を解決するための手段〕[Means to solve the problem]

すなわち、本発明の空気入りタイヤの製造方法は、カー
カスコードをゴムで被覆したシート状のカーカス材料の
少なくともコードを含む部分の両端部に電離性放射線を
照射した後、このカーカス材料を成形ドラムに筒状に巻
きつけて電離性放射線を照射した端部同志を互いにラッ
プ又は突き合わさせたあと、この筒状のカーカス材料の
両側縁ルこそれぞれビードを装着し、しかる後にこの筒
状のカーカス材料の外周中央部にキャップトレッドを、
両側部にサイドトレッドをそれぞれ積層することを特徴
とするものである。
That is, in the method for manufacturing a pneumatic tire of the present invention, after ionizing radiation is irradiated to both ends of at least the cord-containing portion of a sheet-like carcass material in which a carcass cord is covered with rubber, the carcass material is placed in a forming drum. After wrapping or abutting the ends of the cylindrical carcass material, which have been irradiated with ionizing radiation, beads are attached to each side edge of the cylindrical carcass material. A cap tread is placed at the center of the outer circumference of the
It is characterized by laminating side treads on both sides.

ここで、重要なことは、上記成形ドラムに巻きつける前
のカーカス材料の少なくともコードを含む部分の端部に
、予め電離性放射線を照射して予備加硫をしておくこと
である。
What is important here is to pre-vulcanize the end of at least the cord-containing portion of the carcass material before it is wrapped around the forming drum by irradiating it with ionizing radiation.

以下、本発明にかかる空気入りタイヤの製造方法につい
て具体的に説明する。
Hereinafter, the method for manufacturing a pneumatic tire according to the present invention will be specifically explained.

第1図に示すように、カーカス材料の素材1は、その一
方の縁2に設けられた幅Xの耳部3以外の部分Aに互い
に平行なコード4を配設すると共に、コード4が配設さ
れていない耳部3を含めてその全幅(x+W)に亘って
コートゴム5を用いて被覆又はカレンダー加工すること
によって形成される。前述したように、耳部3には、コ
ード4が配設されていないから耳部3はコートゴム5の
みにより形成されている。
As shown in FIG. 1, a material 1 of carcass material is provided with cords 4 parallel to each other in a portion A other than the ear portion 3 having a width X provided on one edge 2. It is formed by covering the entire width (x+W) including the ears 3 which are not provided with the coat rubber 5 or by calendering. As described above, since the cord 4 is not provided in the ear portion 3, the ear portion 3 is formed only of the coated rubber 5.

ここで、少なくともカーカス材料のコード4が埋設され
ている部分Aの両端部に電離性放射線を照射するが、放
射線照射幅は、第4に示すように、耳部3を有する端部
10側では耳部3の幅Xを含む幅W、又は耳部3を除外
した幅(w−x)とし、耳部3の無い他端部lO°側で
は幅W°とする。耳部付端部10側では、幅Wから耳部
3の端部10側の一部を除外した幅とすることができる
。また、w−xに相当する幅は、コード4が少なくとも
1本、さらに好ましくは2木取上程度存在する幅とし、
W“に相当する幅もコード4が2本捏度以上存在する幅
とすることが好ましい。特に、耳部3のない方の端部1
0°の電離性放射線照射は、う・ノブ状態で、少なくと
もラップ幅を越える長さまで照射しておくことが好まし
い。これにより耳部端部域でのコードの乱れを防止でき
る。電離性放射線としては、電子線が好ましく使用され
る。
Here, ionizing radiation is irradiated to at least both ends of the portion A where the cord 4 of the carcass material is buried, but the width of the radiation irradiation is limited to the side of the end 10 having the ears 3, as shown in the fourth figure. The width W includes the width X of the ear portion 3, or the width excluding the ear portion 3 (w-x), and the width W° is set at the other end lO° side where the ear portion 3 does not exist. On the edge portion 10 side with the ear portion, the width can be determined by excluding a part of the ear portion 3 on the end portion 10 side from the width W. In addition, the width corresponding to w-x is such that at least one cord 4 exists, and more preferably two cords are present.
It is preferable that the width corresponding to W" is also a width in which two or more cords 4 are present. In particular, the end portion 1 without the ear portion 3
It is preferable that the 0° ionizing radiation be irradiated to a length that exceeds at least the lap width in the knob state. This prevents the cord from being disturbed in the ear end region. As the ionizing radiation, an electron beam is preferably used.

このカーカス材料の素材lを所定の長さeに切断すると
、第2図に示すように、一端にコートゴム5だけからな
る耳部3を持つシート状のカーカス材料6が形成される
。このようにして得られたシート状のカーカス材料6は
、第3図に示すように、カーカス材料同志が重ならない
ように布製のライナー7上に並べながらセル8に巻き取
られる。
When this carcass material raw material 1 is cut into a predetermined length e, a sheet-like carcass material 6 is formed, as shown in FIG. 2, having an ear portion 3 made of only coat rubber 5 at one end. The sheet-like carcass material 6 thus obtained is wound up into cells 8 while being arranged on a cloth liner 7 so that the carcass materials do not overlap each other, as shown in FIG.

前述の切断されたカーカス材料6の耳部3を除外した全
長Wは、成形される円筒状カーカス(後述する一部グリ
ーンタイヤ)の−周分に相当する長さより若干長め又は
−周分とほぼ同等の長さに設定する。
The total length W of the above-mentioned cut carcass material 6 excluding the ears 3 is slightly longer than the length corresponding to the -circumference of the cylindrical carcass to be formed (a part of the green tire to be described later), or approximately the length corresponding to the -circumference. Set to equal length.

セル8に一定量のカーカス材料6を巻き取ると、このセ
ル8は、タイヤ成形工程に運搬される。そして、セル8
から1枚ずつ引き出されたシート状のカーカス材料6は
、成形ドラム9に供給される。
Once a certain amount of carcass material 6 has been wound around the cell 8, the cell 8 is transported to the tire building process. And cell 8
The sheet-like carcass material 6 pulled out one by one is supplied to a forming drum 9.

この放射線処理したシート状のカーカス材料6を、第5
図に示すように、成形ドラム9に巻きつけ、その放射線
処理した部分を互いにランプすることにより円筒状のカ
ーカス11を形成する。すなわち、第6図に示すように
、コード4のない耳部3とコード4を含む端部10’と
を互いにコード4の埋設された部分がほとんど重ならな
いようにラップさせて、円筒状のカーカス11にする。
This radiation-treated sheet-like carcass material 6 was
As shown in the figure, a cylindrical carcass 11 is formed by wrapping it around a forming drum 9 and ramping the radiation-treated portions together. That is, as shown in FIG. 6, the ear part 3 without the cord 4 and the end part 10' containing the cord 4 are wrapped so that the part where the cord 4 is buried hardly overlaps, and a cylindrical carcass is formed. Make it 11.

なお、円筒状カーカス11の一周分に相当する長さより
若干長めのカーカス材料を使用し、最外部のコード4同
志が重なるようにしてもよい(第7図参照)。
Note that a carcass material having a length slightly longer than one circumference of the cylindrical carcass 11 may be used so that the outermost cords 4 overlap each other (see FIG. 7).

このようにして形成された円筒状のカーカス11の両サ
イド部を第8図に示すように絞り、その絞り部12にそ
れぞれ円環状のビード13を装着する。
Both side portions of the cylindrical carcass 11 thus formed are squeezed as shown in FIG. 8, and annular beads 13 are attached to the squeezed portions 12, respectively.

ビードの装着が完了したら、第9図に示すように、ター
ンアップブラダ−14の膨脹を利用して円筒状のカーカ
ス11の両サイド部をそれぞれ折り返し、1次グリーン
タイヤ15とする。
When the bead installation is completed, as shown in FIG. 9, both sides of the cylindrical carcass 11 are folded back using the expansion of the turn-up bladder 14 to form a primary green tire 15.

更に、折り返された両サイド部にそれぞれ帯状のサイド
トレンド16を巻きつけて端部同志をスプライスする。
Furthermore, band-shaped side trends 16 are wrapped around each of the folded side portions, and the ends are spliced together.

そして、2次成形のため、成形ドラム9によって形成し
た1次グリーンタイヤ15を前記成形ドラム9から2次
成形用の成形ドラム17に移し換える(第10図参照)
Then, for secondary forming, the primary green tire 15 formed by the forming drum 9 is transferred from the forming drum 9 to a forming drum 17 for secondary forming (see Fig. 10).
.

そして、2吹成形用の左右一対の成形ドラム17.17
に1次グリーンタイヤ15を装着すると、内側のブラダ
−18を径方向に膨脹させると共に、左右の成形ドラム
17.17を軸方向に接近させながら1次グリーンタイ
ヤ15を所定の直径になるまで膨らませる。このとき、
ラップ部は周方向に、若干、相対移動し、ラップ部分の
うち耳部付端部10例の部分では、耳部3に相当する部
分がラップ部分として残存するが、コード4を含むカー
カス部分はラップ部分がなくなる。
And a pair of left and right molding drums 17.17 for 2-blow molding.
When the primary green tire 15 is mounted on the vehicle, the inner bladder 18 is expanded in the radial direction, and the left and right forming drums 17. Ru. At this time,
The wrap portion moves slightly in the circumferential direction, and in the 10 examples of the end portions with ears among the wrap portions, the portion corresponding to the ear portion 3 remains as the wrap portion, but the carcass portion including the cord 4 remains as the wrap portion. The wrap part is gone.

耳部付端部10例のコード4を含むカーカス部分及び耳
部無し端部10°側のコード4を含むカーカス部分は、
放射線照射によりゴム部分の粘着性が高められているた
め、コード4の乱れを生ずることなく成形が完了される
The carcass part including the cord 4 of the 10 examples of the end with ears and the carcass part including the cord 4 of the 10° side of the end without ears are as follows:
Since the adhesiveness of the rubber portion is increased by radiation irradiation, the molding is completed without causing any disturbance of the cord 4.

このように、1次グリーンタイヤ15を膨らませてから
第11図に示すように、サイドトレッド16の端部を一
部剥離させた状態にして、この径方向に膨らんだこの1
次グリーンタイヤ15の外周に内側にベルト19を積層
した帯状のキャップトレンド20を巻き付け、端部同志
をスプライスさせる。
After the primary green tire 15 is inflated, as shown in FIG.
Next, a band-shaped cap trend 20 with a belt 19 laminated on the inside is wrapped around the outer periphery of the green tire 15, and the ends are spliced together.

次いで、第12図に示すように、キャップトレッド20
の両サイドを1次グリーンタイヤ15に密着させると共
に、その上にサイドトレンド16の端部を密着させ、グ
リーンタイヤ21を形成する。
Next, as shown in FIG. 12, the cap tread 20
Both sides of the primary green tire 15 are brought into close contact with the primary green tire 15, and the ends of the side trends 16 are brought into close contact thereon to form a green tire 21.

完成したグリーンタイヤ21は、第13図に示すように
、ブラダ−18から取り外したあと加硫工程に移され、
金型で加硫成形される。
As shown in FIG. 13, the completed green tire 21 is removed from the bladder 18 and then transferred to a vulcanization process.
It is vulcanized and molded in a mold.

前述した方法によって製造された空気入りタイヤは、円
筒状のカーカス11のラップのスプライス部に、コード
4を含むカーカス材料が積層されることがない。したが
って、この空気入りタイヤは、ラップ状のスプライス部
に起因する段差及び剛性差がないからラジアル・フォー
ス・バリエーション(RF V)の悪化が解消され、タ
イヤのユニフォミティ (U F)が向上する。また、
バンピー・プライ・サイド(B、P。
In the pneumatic tire manufactured by the method described above, the carcass material containing the cord 4 is not laminated at the splice portion of the wrap of the cylindrical carcass 11. Therefore, since this pneumatic tire has no step difference or rigidity difference caused by the lap-shaped splice portion, deterioration in radial force variation (RFV) is eliminated, and uniformity (UF) of the tire is improved. Also,
Bumpy Ply Side (B, P.

S)も従来の空気入りタイヤに比べて非常に小さくなる
S) is also much smaller than that of conventional pneumatic tires.

また、前述した如く、本発明方法によって形成された空
気入りタイヤは、円筒状のカーカスのラップ部付近のコ
ードが埋設されたゴム部分が、予め、予備加硫されてい
るため、グリーンタイヤをブラダ−で金型にリフトする
ときのカーカスコードの乱れを生ずることがなく、この
点でもタイヤのユニフォξティ (UF)が向上する。
In addition, as mentioned above, in the pneumatic tire formed by the method of the present invention, the rubber part in which the cord is buried near the lap part of the cylindrical carcass is pre-vulcanized in advance, so the green tire can be inserted into the bladder. There is no disturbance of the carcass cord when the tire is lifted into the mold at -, and the uniformity (UF) of the tire is improved in this respect as well.

〔発明の効果〕〔Effect of the invention〕

上記のように、本発明の空気入りタイヤの製造方法から
得られた空気入りタイヤは、従来タイヤにおけるスプラ
イス部のようにカーカスコードの重なりがないため、段
差や剛性差に基づ<RFVが小さくなり、タイヤのユニ
フォミティ (UF)を向上する。また、予め、少なく
ともカーカス材料のコードが埋設されたゴム部分の端部
を電離性放射線処理しているため、グリーンタイヤをブ
ラダ−で金型にリフトするときのカーカスコードの乱れ
をほとんど生ずることがないようにでき、タイヤのユニ
フォξティ(UF)が−層間上すると共に、バンピー・
プライ・サイド(B、P、S)も従来の空気入りタイヤ
に比べて非常に小さくなり、タイヤ表面の外観も向上す
るようになる。
As mentioned above, the pneumatic tire obtained from the pneumatic tire manufacturing method of the present invention has a small RFV due to the difference in height and rigidity because the carcass cords do not overlap unlike the splice part in conventional tires. This improves tire uniformity (UF). In addition, since at least the end of the rubber part in which the cord of the carcass material is buried is treated with ionizing radiation in advance, there is almost no disturbance of the carcass cord when lifting the green tire into the mold with a bladder. This increases the uniformity (UF) of the tire and reduces bumpy bumps.
The ply sides (B, P, S) are also much smaller than in conventional pneumatic tires, and the appearance of the tire surface is also improved.

〔実施例〕〔Example〕

後述するシート状カーカス材料を作威し、該シート状カ
ーカス材料の端部をそれぞれ1011ずつラップさせて
一次グリーンタイヤ15を成形した以外は共通にして製
造した本発明タイヤと従来タイヤを各々5本用意し、ラ
ジアルフォースの変動(RFV)及びバンピー・ブライ
・サイド(B、P、S)を測定した。
Five tires of the present invention and five conventional tires were manufactured in the same manner except that a sheet-shaped carcass material to be described later was used and the edges of the sheet-shaped carcass material were wrapped 1011 times each to form a primary green tire 15. The radial force variation (RFV) and bumpy, bright side (B, P, S) were measured.

主魚里又工土Δ 耳部幅(x)=10m 放射線照射位置及び幅(第4図に対応)方何端部10側
:幅(w)=20mm 耳無し端部10’側:幅(w’)=15mm生鬼里l工
土旦 耳部幅(x)=9m重 放射線照射位置及び幅(第4図に対応)方何端部10側
二幅(W)=20璽璽 耳無し端部10°側:幅(W’)=15+u本遣をし−
L1旦 耳部幅(x)=10m亀 放射線照射位置及び幅(第4図に対応)方何端部10側
:輻(w−x)−10++n耳無し端部10°側:幅(
w’)=15flk来l工土 耳部及び放射線照射なし なお、タイヤサイズは、いずれものタイヤとも205/
65R15であった。
Main Uori Mata construction soil Δ Ear width (x) = 10 m Radiation irradiation position and width (corresponding to Figure 4) Which end 10 side: Width (w) = 20 mm Earless end 10' side: Width ( w') = 15mm Ikori lug Dotan ear part width (x) = 9m Heavy radiation irradiation position and width (corresponding to Figure 4) How many ends 10 sides 2 widths (W) = 20 Seal earless end Part 10° side: Width (W') = 15 + u main direction -
L1 Ear width (x) = 10m Radiation irradiation position and width (corresponding to Figure 4) End 10 side: Radius (w-x) -10++n Earless end 10° side: Width (
w') = 15flk to l No earth ear and radiation irradiation The tire size for both tires is 205/
It was 65R15.

(1)RFV 固定条住 fa)  使用リム:61/2JJ(標準リム)(b)
  荷重: 480kg fol  空気圧: 2.Okg/am2(d)  回
転数:5(lrpm その結果、従来タイヤのRFVは約13kgであったの
に対して、本発明タイヤA、B及びCでは約4kgであ
った。
(1) RFV fixed row housing fa) Rim used: 61/2JJ (standard rim) (b)
Load: 480kg fol Air pressure: 2. Okg/am2(d) Number of revolutions: 5 (lrpm) As a result, the RFV of the conventional tire was about 13 kg, whereas the RFV of the tires A, B, and C of the present invention was about 4 kg.

(2)  B、 P、 S 本発明タイヤA、B及びCは、バンピー・ブライ・サイ
ドが0.15〜0.35mmであった。これに対し、従
来タイヤのバンピー・プライ・サイドは、0.7n程度
であった。
(2) B, P, S Tires A, B, and C of the present invention had a bumpy/bright side of 0.15 to 0.35 mm. In contrast, the bumpy ply side of conventional tires was about 0.7n.

【図面の簡単な説明】[Brief explanation of drawings]

第1図乃至第13図は本発明にかかる空気入りタイヤの
製造方法を工程順に示す説明図である。 4・・・カーカスコード、5・・・ゴム、6・・・シー
ト状のカーカス材料、9・・・成形ドラム、10.lO
l・・・端部、11・・・筒状のカーカス材料、13・
・・ビード、16・・・サイドトレッド、20・・・キ
ャップトレンド。
FIGS. 1 to 13 are explanatory diagrams showing the method for manufacturing a pneumatic tire according to the present invention in the order of steps. 4... Carcass cord, 5... Rubber, 6... Sheet-like carcass material, 9... Molding drum, 10. lO
l... End portion, 11... Cylindrical carcass material, 13.
...Bead, 16...Side tread, 20...Cap trend.

Claims (1)

【特許請求の範囲】[Claims] カーカスコードをゴムで被覆したシート状のカーカス材
料の少なくともコードを含む部分の両端部に電離性放射
線を照射した後、このカーカス材料を成形ドラムに筒状
に巻きつけて電離性放射線を照射した端部同志を互いに
ラップ又は突き合わさせたあと、この筒状のカーカス材
料の両側縁にそれぞれビードを装着し、しかる後にこの
筒状のカーカス材料の外周中央部にキャップトレッドを
、両側部にサイドトレッドをそれぞれ積層する空気入り
タイヤの製造方法。
After irradiating both ends of at least the cord-containing portion of a sheet-like carcass material in which a carcass cord is covered with rubber with ionizing radiation, the carcass material is wrapped around a forming drum in a cylindrical shape, and the ends irradiated with ionizing radiation After the parts are lapped or butted against each other, beads are attached to each side edge of this cylindrical carcass material, and then a cap tread is attached to the center of the outer periphery of this cylindrical carcass material, and side treads are attached to both sides. A method of manufacturing pneumatic tires in which layers are laminated.
JP1316391A 1989-12-07 1989-12-07 Manufacturing method for pneumatic tires Expired - Lifetime JP2741085B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1316391A JP2741085B2 (en) 1989-12-07 1989-12-07 Manufacturing method for pneumatic tires

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1316391A JP2741085B2 (en) 1989-12-07 1989-12-07 Manufacturing method for pneumatic tires

Publications (2)

Publication Number Publication Date
JPH03178427A true JPH03178427A (en) 1991-08-02
JP2741085B2 JP2741085B2 (en) 1998-04-15

Family

ID=18076559

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1316391A Expired - Lifetime JP2741085B2 (en) 1989-12-07 1989-12-07 Manufacturing method for pneumatic tires

Country Status (1)

Country Link
JP (1) JP2741085B2 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003101715A1 (en) * 2002-05-24 2003-12-11 Bridgestone Corporation Method of manufacturing tire component member and pneumatic tire

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2003101715A1 (en) * 2002-05-24 2003-12-11 Bridgestone Corporation Method of manufacturing tire component member and pneumatic tire
US7445687B2 (en) 2002-05-24 2008-11-04 Bridgestone Corporation Component fabricating method and pneumatic tire

Also Published As

Publication number Publication date
JP2741085B2 (en) 1998-04-15

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