JPH10296876A - Formation of green tire - Google Patents
Formation of green tireInfo
- Publication number
- JPH10296876A JPH10296876A JP9106206A JP10620697A JPH10296876A JP H10296876 A JPH10296876 A JP H10296876A JP 9106206 A JP9106206 A JP 9106206A JP 10620697 A JP10620697 A JP 10620697A JP H10296876 A JPH10296876 A JP H10296876A
- Authority
- JP
- Japan
- Prior art keywords
- molding machine
- injection
- extruded
- injection molding
- unvulcanized
- 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.)
- Pending
Links
- 230000015572 biosynthetic process Effects 0.000 title 1
- 229920001971 elastomer Polymers 0.000 claims abstract description 60
- 239000005060 rubber Substances 0.000 claims abstract description 60
- 238000001746 injection moulding Methods 0.000 claims abstract description 42
- 238000000034 method Methods 0.000 claims abstract description 26
- 238000001125 extrusion Methods 0.000 claims abstract description 10
- 238000000465 moulding Methods 0.000 claims description 28
- 238000002347 injection Methods 0.000 abstract description 6
- 239000007924 injection Substances 0.000 abstract description 6
- 238000004804 winding Methods 0.000 abstract description 5
- 239000000243 solution Substances 0.000 abstract 1
- 239000000463 material Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Landscapes
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Tyre Moulding (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、グリーンタイヤの
成形方法に関し、更に詳しくは、ストリップワインド法
により複数種類の未加硫ゴムからなるタイヤ構成部を成
形するようにしたグリーンタイヤの成形方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding a green tire, and more particularly, to a method for molding a green tire in which a tire component made of a plurality of types of unvulcanized rubber is molded by a strip wind method. .
【０００２】[0002]
【従来の技術】一般にグリーンタイヤにおいてキャップ
トレッド、サイドトレッド等のタイヤ構成部を成形する
には、そのタイヤ構成部の横断面形状に近似した形状を
もつ未加硫のゴム板材をタイヤサイズ毎に押し出し、そ
のゴム板材を一旦巻取りドラムに巻き取ってストック
し、使用時に巻戻してタイヤ周長に相当する長さに切断
して成形ドラム上に巻き付け、その両端部同士をスプラ
イスするようにして行われている。2. Description of the Related Art Generally, to form a tire component such as a cap tread and a side tread in a green tire, an unvulcanized rubber plate material having a shape similar to the cross-sectional shape of the tire component is formed for each tire size. Extrude, take up the rubber plate material once on a take-up drum, stock it, rewind it at the time of use, cut it into a length equivalent to the tire circumference, wind it around a forming drum, and splice both ends of it. Is being done.
【０００３】このような一般的な成形方法に対して、射
出成形機から未加硫ゴムを細い帯状のストリップに押し
出し、それを成形ドラム又は成形中子に連続的に複数回
にわたり巻き付けて、その集積された全体の断面形状を
上記タイヤ構成部に相当する形状にする所謂ストリップ
ワインド法が別途提案されている。後者のストリップワ
インド法は、前者の成形方法のようにタイヤサイズ毎に
ゴム板材をストックする必要がなく、タイヤサイズにか
かわらず射出成形機を移動させながらゴムストリップを
巻き重ねるだけで所定サイズのタイヤ構成部を成形する
ことができるため、生産性が極めて高い。[0003] For such a general molding method, unvulcanized rubber is extruded from an injection molding machine into a thin strip-shaped strip, which is continuously wound around a molding drum or a molding core several times. A so-called strip wind method has been separately proposed in which the cross-sectional shape of the entire integrated body is made to have a shape corresponding to the tire component. Unlike the former method, the strip wind method does not require stocking of rubber plates for each tire size, and a tire of a predetermined size can be obtained by simply winding a rubber strip while moving the injection molding machine regardless of the tire size. Since the component can be molded, productivity is extremely high.
【０００４】しかしながら、一般にタイヤ構成部である
キャップトレッド、サイドトレッド、サイドウォール等
は、それぞれの特性に応じて複数種類の異なるゴムコン
パウンドが使用されるから、ストリップワインド法によ
る場合でも、各タイヤ構成部を成形する際に未加硫ゴム
を入れ替えて一時操業を中断するとか、或いは複数の未
加硫ゴム毎に複数台の射出成形機を用意するほどの処置
が必要であり、生産性の観点からはまだ改善が必要であ
った。[0004] However, since a plurality of different rubber compounds are generally used for the tire components such as the cap tread, the side tread, the sidewall and the like, even if the strip wind method is used, each tire component may be used. It is necessary to replace the unvulcanized rubber when molding the part and temporarily suspend operation, or to prepare multiple injection molding machines for each of a plurality of unvulcanized rubbers. Still needed improvement.
【０００５】[0005]
【発明が解決しようとする課題】本発明の目的は、スト
リップワインド法による高い生産性を更に向上すること
を可能にするグリーンタイヤの成形方法を提供すること
にある。SUMMARY OF THE INVENTION An object of the present invention is to provide a green tire molding method which makes it possible to further improve high productivity by a strip wind method.
【０００６】[0006]
【課題を解決するための手段】上記目的を達成する本発
明のグリーンタイヤの成形方法は、１台の射出成形機に
複数種類の未加硫ゴムを押出順に充填し、該射出成形機
から前記複数種類の未加硫ゴムを成形ドラム又は成形中
子上に順次連続的にストリップ状に押し出しながら巻き
付けてタイヤ構成部を成形することを特徴とする。According to the present invention, there is provided a method for molding a green tire according to the present invention, in which a single injection molding machine is filled with a plurality of types of unvulcanized rubber in the order of extrusion. It is characterized in that a plurality of types of unvulcanized rubber are successively extruded onto a forming drum or a forming core while being continuously extruded into a strip shape and wound to form a tire component.
【０００７】このように複数種類の未加硫ゴムを押出順
に１台の射出成形機に充填し、それをゴムストリップと
して連続的に成形ドラム又は成形中子上に押し出しなが
ら巻き付けてタイヤ構成部を成形するので、異なる未加
硫ゴム毎に射出成形機を停止したり、或いは複数台の射
出成形機を設備する無駄を省くことができるので、スト
リップワインド法による高生産性を一層向上することが
できる。As described above, a plurality of types of unvulcanized rubber are charged into a single injection molding machine in the order of extrusion, and the rubber is stripped as a rubber strip while continuously being extruded onto a molding drum or a molding core to form a tire component. Since molding is performed, the injection molding machine can be stopped for each different unvulcanized rubber, or the waste of installing a plurality of injection molding machines can be reduced, so that high productivity by the strip wind method can be further improved. it can.
【０００８】[0008]
【発明の実施の形態】以下、本発明の構成について添付
の図面を参照しながら詳細に説明する。図１，２は本発
明のグリーンタイヤの成形方法の一例を示す。１は帯状
のゴムストリップＳを連続して押し出す射出成形機、２
Ａ，２Ｂ，２Ｃは射出成形機１に３種類の未加硫ゴム
ａ，ｂ，ｃをそれぞれ供給するスクリュー式の押出機で
あり、ここでは３種類の未加硫ゴムａ，ｂ，ｃからなる
タイヤ構成部Ｑを成形する場合を示している。用意され
た３台の押出機２Ａ，２Ｂ，２Ｃの下方に１台の射出成
形機１が配設され、その１台の射出成形機１が矢印Ｘ
１，Ｘ２のように前進し、各押出機２Ａ，２Ｂ，２Ｃか
ら未加硫ゴムａ，ｂ，ｃが順次充填されるようになって
いる。３はグリーンタイヤを成形する回転駆動可能な成
形ドラムである。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The configuration of the present invention will be described below in detail with reference to the accompanying drawings. 1 and 2 show an example of a green tire molding method of the present invention. 1 is an injection molding machine for continuously extruding a belt-shaped rubber strip S, 2
A, 2B, and 2C are screw-type extruders that supply three types of unvulcanized rubbers a, b, and c to the injection molding machine 1, respectively. Here, three types of unvulcanized rubbers a, b, and c are used. The case where the tire component part Q is formed is shown. One injection molding machine 1 is disposed below the three prepared extruders 2A, 2B, 2C.
The extruders 2A, 2B, and 2C are sequentially filled with unvulcanized rubbers a, b, and c, respectively, as shown by 1, X2. Reference numeral 3 denotes a rotationally drivable forming drum for forming a green tire.
【０００９】本発明のグリーンタイヤの成形方法によれ
ば、図１に示すように、先ず射出成形機１が押出順で最
後に押し出される未加硫ゴムａを押出機２Ａから射出ポ
ット１ａ内に充填されると、矢印Ｘ１のように前進し、
続いてその前に押し出される未加硫ゴムｂが押出機２Ｂ
から射出ポット１ａ内に充填される。未加硫ゴムｂの充
填が終了すると、更に射出成形機１は矢印Ｘ２のように
前進し、押出機２Ｃから最初に押し出される未加硫ゴム
ｃの充填を受ける。ここで、射出成形機１の射出ポット
１ａ内は、タイヤ構成部Ｑのゴム使用量に相当する異種
の未加硫ゴムａ，ｂ，ｃが種類毎に押出順に充填された
状態となる。According to the green tire molding method of the present invention, as shown in FIG. 1, the injection molding machine 1 first puts the unvulcanized rubber a which is finally extruded in the extrusion order from the extruder 2A into the injection pot 1a. When filled, it moves forward as indicated by arrow X1,
Subsequently, the unvulcanized rubber b extruded before the extruder 2B
From the injection pot 1a. When the filling of the unvulcanized rubber b is completed, the injection molding machine 1 further advances as indicated by an arrow X2, and receives the filling of the unvulcanized rubber c first extruded from the extruder 2C. Here, the inside of the injection pot 1a of the injection molding machine 1 is in a state in which different types of unvulcanized rubbers a, b, and c corresponding to the amount of rubber used in the tire component Q are filled in the order of extrusion for each type.
【００１０】次いで、射出成形機１を成形ドラム３と対
面する位置まで移動させ、射出成形機１の押出速度と成
形ドラム３の回転速度を同期させながら、図２に示すよ
うに、成形ドラム３を矢印Ｍの方向に回転させると共
に、射出成形機１を矢印Ｎのように移動させることによ
り、射出成形機１により順次連続して押し出された帯状
のゴムストリップＳを成形ドラム３上で既に成形された
タイヤ中間成形物Ｚ上に連続して複数回巻き付ける。射
出成形機１はピストン１ｂによる押し出しであるため、
射出ポット１ａ内の異種の未加硫ゴムａ，ｂ，ｃは、図
３にその押し出されたゴムストリップＳの全長を展開し
て示すように、混じり合うことなく順次帯状に押し出さ
れ、図４に示すような３種類の未加硫ゴムａ，ｂ，ｃか
らなるタイヤ構成部Ｑが成形される。Next, the injection molding machine 1 is moved to a position facing the molding drum 3 and, while synchronizing the extrusion speed of the injection molding machine 1 and the rotation speed of the molding drum 3, as shown in FIG. Is rotated in the direction of arrow M and the injection molding machine 1 is moved as indicated by arrow N, whereby the belt-shaped rubber strip S sequentially and continuously extruded by the injection molding machine 1 is already formed on the forming drum 3. It winds continuously on the tire intermediate molded product Z which carried out plural times. Since the injection molding machine 1 is extruded by the piston 1b,
The different unvulcanized rubbers a, b, and c in the injection pot 1a are sequentially extruded in a band shape without mixing as shown in FIG. The tire component Q made of three types of unvulcanized rubbers a, b, and c as shown in FIG.
【００１１】このように１台の射出成形機１に複数種類
の未加硫ゴムａ，ｂ，ｃ毎に押出順に充填し、それをゴ
ムストリップＳとして成形ドラム３上に順次連続して押
し出しながら巻き付けてタイヤ構成部Ｑを成形するた
め、異なる未加硫ゴムａ，ｂ，ｃ毎に射出成形機を止め
て操業を中断してり、或いは複数台の射出成形機を設置
する無駄がなく、従って、ストリップワインド法による
高い生産性を一層改善することができる。As described above, a plurality of types of unvulcanized rubbers a, b, and c are filled in one injection molding machine 1 in the order of extrusion, and are continuously extruded as a rubber strip S onto the molding drum 3 in sequence. Since the tire forming part Q is wound and wound, the injection molding machine is stopped for each different unvulcanized rubber a, b, and c to stop the operation, or there is no waste in installing a plurality of injection molding machines. Therefore, high productivity by the strip wind method can be further improved.
【００１２】図５は、本発明のグリーンタイヤの成形方
法の他の例を示す。上記実施形態において、ゴムストリ
ップＳを一旦巻き取る回転駆動可能な補助ドラム４を更
に用いるようにしたものである。図５（ａ）に示すよう
に、射出成形機１から押し出された未加硫のゴムストリ
ップＳを一旦補助ドラム４上に、その補助ドラム４を矢
印Ｅのように回転させると共に、矢印Ｆのように一方向
に移動させながら一定のピッチＰで螺旋状に巻き上げ
る。これを図５（ｂ）のように成形ドラム３と補助ドラ
ム４とをそれぞれ矢印の方向に同期して回転させると共
に、補助ドラム４を矢印Ｇの方向に移動させることによ
り、補助ドラム４から巻き戻しながら成形ドラム３上で
既に成形されたタイヤ中間成形物Ｚ上に連続して複数回
巻き付けて、タイヤ構成部を成形するのである。このよ
うに直接成形ドラム３に巻き付けずに、補助ドラム４を
介して成形ドラム３上にタイヤ構成部を成形するように
してもよく、この補助ドラム４の使用により、押出初期
や押出終期で押出量が変動し易い射出成形機１から直接
形成ドラム３上にゴムストリップＳを巻き付ける場合よ
りも同期運転が容易となるため、高い寸法精度のタイヤ
構成部を得ることができる。FIG. 5 shows another example of the green tire molding method of the present invention. In the above-described embodiment, the auxiliary drum 4 that can be driven to rotate for temporarily winding the rubber strip S is further used. As shown in FIG. 5A, the unvulcanized rubber strip S extruded from the injection molding machine 1 is temporarily put on the auxiliary drum 4, and the auxiliary drum 4 is rotated as shown by an arrow E, Is spirally wound at a constant pitch P while moving in one direction. 5B, the forming drum 3 and the auxiliary drum 4 are rotated in synchronization with the directions of the arrows, respectively, and the auxiliary drum 4 is moved in the direction of the arrow G, so that the auxiliary drum 4 is wound from the auxiliary drum 4. While returning, it is continuously wound a plurality of times on the tire intermediate molded product Z already molded on the molding drum 3 to form a tire component. As described above, the tire component may be formed on the forming drum 3 via the auxiliary drum 4 without being wound directly on the forming drum 3. Synchronous operation is easier than when the rubber strip S is wound directly on the forming drum 3 from the injection molding machine 1 in which the amount tends to fluctuate, so that a tire component having high dimensional accuracy can be obtained.
【００１３】本発明において、上記実施形態では、射出
成形機１が前進して押出機２Ａ，２Ｂ，２Ｃから未加硫
ゴムａ，ｂ，ｃの供給を受けるようにしたが、押出機２
Ａ，２Ｂ，２Ｃを移動させることにより、射出成形機１
に未加硫ゴムａ，ｂ，ｃを充填するようにしてもよい。
また、成形ドラム３は、剛性を有する成形中子であって
もよい。In the present invention, in the above embodiment, the injection molding machine 1 moves forward to receive the supply of the unvulcanized rubbers a, b, c from the extruders 2A, 2B, 2C.
By moving A, 2B, and 2C, the injection molding machine 1
May be filled with unvulcanized rubbers a, b and c.
The forming drum 3 may be a rigid forming core.
【００１４】本発明は、上記実施形態において、３台の
押出機２Ａ，２Ｂ，２Ｃを設置し、３種類の未加硫ゴム
ａ，ｂ，ｃをゴムストリップＳとして押し出しながらタ
イヤ構成部Ｑを成形する例を示したが、２種類以上の未
加硫ゴムをゴムストリップとして連続的に押し出してタ
イヤ構成部を成形する場合であればよく、例えば、サイ
ドトレッドやキャップトレッド、サイドウォール等の特
性に応じて異なる複数種類の未加硫ゴムが使用される各
タイヤ構成部を成形するのに好ましく用いることができ
る。According to the present invention, in the above embodiment, three extruders 2A, 2B, and 2C are installed, and the tire component Q is extruded while extruding three types of unvulcanized rubbers a, b, and c as a rubber strip S. Although an example of molding is shown, it is only necessary to continuously extrude two or more types of unvulcanized rubber as a rubber strip to form a tire component, and for example, characteristics such as side tread, cap tread, and sidewall Can be preferably used for molding each tire component in which a plurality of different types of unvulcanized rubber are used.
【００１５】[0015]
【発明の効果】上述したように本発明は、１台の射出成
形機に複数種類の未加硫ゴムを押出順に充填し、該射出
成形機から複数種類の未加硫ゴムを成形ドラム又は成形
中子上に順次連続的にストリップ状に押し出しながら巻
き付けてタイヤ構成部を成形するので、異なる未加硫ゴ
ム毎に射出成形機を停止したり、或いは複数台の射出成
形機を装備する無駄を省くことができ、それによってス
トリップワインド法による高い生産性を更に向上するこ
とができる。As described above, according to the present invention, a single injection molding machine is filled with a plurality of types of unvulcanized rubber in the order of extrusion. Since the tire component is formed by winding it while continuously extruding it into a strip shape on the core, the injection molding machine is stopped for each different unvulcanized rubber, or wasteful mounting of a plurality of injection molding machines is avoided. Thus, the high productivity by the strip wind method can be further improved.
【図１】本発明のグリーンタイヤの成形方法において、
押出機から射出成形機に３種類の未加硫ゴムを充填する
工程の一例を示す説明図である。FIG. 1 shows a method for molding a green tire according to the present invention.
It is explanatory drawing which shows an example of the process of filling three types of unvulcanized rubbers from an extruder to an injection molding machine.
【図２】本発明のグリーンタイヤの成形方法において、
射出成形機から成形ドラムにゴムストリップを押し出し
ながら巻き付ける工程の一例を示す説明図である。FIG. 2 shows a method of molding a green tire according to the present invention.
It is explanatory drawing which shows an example of the process of winding while extruding a rubber strip from an injection molding machine to a forming drum.
【図３】射出成形機から押し出されたゴムストリップを
示し、（ａ）はその全長を示す展開図、（ｂ）は（ａ）
の側面図である。FIGS. 3A and 3B show a rubber strip extruded from an injection molding machine, wherein FIG. 3A is a developed view showing the entire length thereof, and FIG.
FIG.
【図４】ゴムストリップにより成形された３種類の未加
硫ゴムからなるタイヤ構成部の一例を示す拡大断面図で
ある。FIG. 4 is an enlarged cross-sectional view showing an example of a tire component made of three types of unvulcanized rubber formed by a rubber strip.
【図５】（ａ），（ｂ）は、それぞれ本発明のグリーン
タイヤの成形方法の他の例を示す説明図である。FIGS. 5A and 5B are explanatory views showing another example of the green tire molding method of the present invention.
１ 射出成形機 ２Ａ，２Ｂ，２Ｃ
押出機 ３ 成形ドラム ４ 補助ドラム Ｑ タイヤ構成部 Ｓ ゴムストリップ ａ，ｂ，ｃ 未加硫ゴム1 Injection molding machine 2A, 2B, 2C
Extruder 3 Molding drum 4 Auxiliary drum Q Tire component S Rubber strip a, b, c Unvulcanized rubber
Claims (2)
ムを押出順に充填し、該射出成形機から前記複数種類の
未加硫ゴムを成形ドラム又は成形中子上に順次連続的に
ストリップ状に押し出しながら巻き付けてタイヤ構成部
を成形するグリーンタイヤの成形方法。1. An injection molding machine is filled with a plurality of types of unvulcanized rubber in the order of extrusion, and the plurality of types of unvulcanized rubber are sequentially and continuously placed on a molding drum or a molding core from the injection molding machine. A green tire molding method in which a tire component is molded by being wound while being extruded into a strip shape.
し、これら押出機から前記射出成形機に順次充填する請
求項１に記載のグリーンタイヤの成形方法。2. The green tire molding method according to claim 1, wherein an extruder for each of a plurality of types of unvulcanized rubber is prepared, and the extruders are sequentially charged into the injection molding machine.
Priority Applications (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9106206A JPH10296876A (en) | 1997-04-23 | 1997-04-23 | Formation of green tire |
| US09/061,073 US6039826A (en) | 1997-04-22 | 1998-04-16 | Method of forming green tire with strip winding |
| EP98107293A EP0873852B1 (en) | 1997-04-22 | 1998-04-22 | Method of forming green tyres |
| DE69808985T DE69808985T2 (en) | 1997-04-22 | 1998-04-22 | Process for building green tires |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9106206A JPH10296876A (en) | 1997-04-23 | 1997-04-23 | Formation of green tire |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10296876A true JPH10296876A (en) | 1998-11-10 |
Family
ID=14427695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9106206A Pending JPH10296876A (en) | 1997-04-22 | 1997-04-23 | Formation of green tire |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10296876A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003513835A (en) * | 1999-11-19 | 2003-04-15 | ピレリ・プネウマティチ・ソチエタ・ペル・アツィオーニ | Method for manufacturing an elastomeric material component of an automotive wheel tire |
| JP2003305781A (en) * | 2002-04-15 | 2003-10-28 | Yokohama Rubber Co Ltd:The | Method for controlling winding of strip material |
| JP2004025533A (en) * | 2002-06-24 | 2004-01-29 | Yokohama Rubber Co Ltd:The | Method for molding tire component member |
| JPWO2002060676A1 (en) * | 2001-01-31 | 2004-06-03 | 株式会社ブリヂストン | Tire manufacturing method |
| JPWO2008032366A1 (en) * | 2006-09-12 | 2010-01-21 | 東洋ゴム工業株式会社 | Tire manufacturing method |
| US20210245465A1 (en) * | 2018-06-08 | 2021-08-12 | Vmi Holland B.V. | Tire building method and tire building system, in particular for strip-winding |
-
1997
- 1997-04-23 JP JP9106206A patent/JPH10296876A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003513835A (en) * | 1999-11-19 | 2003-04-15 | ピレリ・プネウマティチ・ソチエタ・ペル・アツィオーニ | Method for manufacturing an elastomeric material component of an automotive wheel tire |
| JPWO2002060676A1 (en) * | 2001-01-31 | 2004-06-03 | 株式会社ブリヂストン | Tire manufacturing method |
| JP2003305781A (en) * | 2002-04-15 | 2003-10-28 | Yokohama Rubber Co Ltd:The | Method for controlling winding of strip material |
| JP2004025533A (en) * | 2002-06-24 | 2004-01-29 | Yokohama Rubber Co Ltd:The | Method for molding tire component member |
| JPWO2008032366A1 (en) * | 2006-09-12 | 2010-01-21 | 東洋ゴム工業株式会社 | Tire manufacturing method |
| JP4681652B2 (en) * | 2006-09-12 | 2011-05-11 | 東洋ゴム工業株式会社 | Tire manufacturing method |
| US20210245465A1 (en) * | 2018-06-08 | 2021-08-12 | Vmi Holland B.V. | Tire building method and tire building system, in particular for strip-winding |
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