JP2009143165A - Manufacturing method and manufacturing apparatus for tire - Google Patents

Manufacturing method and manufacturing apparatus for tire Download PDF

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Publication number
JP2009143165A
JP2009143165A JP2007324574A JP2007324574A JP2009143165A JP 2009143165 A JP2009143165 A JP 2009143165A JP 2007324574 A JP2007324574 A JP 2007324574A JP 2007324574 A JP2007324574 A JP 2007324574A JP 2009143165 A JP2009143165 A JP 2009143165A
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Prior art keywords
speed
rubber member
rubber
base
tire
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Japanese (ja)
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Toshihide Harada
俊英 原田
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Bridgestone Corp
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Bridgestone Corp
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Priority to JP2007324574A priority Critical patent/JP2009143165A/en
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    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/92—Measuring, controlling or regulating
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/9259—Angular velocity
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92504—Controlled parameter
    • B29C2948/9258—Velocity
    • B29C2948/926—Flow or feed rate
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92857—Extrusion unit
    • B29C2948/92904—Die; Nozzle zone
    • 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
    • B29C2948/00—Indexing scheme relating to extrusion moulding
    • B29C2948/92—Measuring, controlling or regulating
    • B29C2948/92819—Location or phase of control
    • B29C2948/92933—Conveying, transporting or storage of articles

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Tyre Moulding (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a manufacturing method and a manufacturing apparatus for a tire which reduce the contraction amount of rubber after being pasted to a tire molding drum (core drum). <P>SOLUTION: Tension is not applied to a rubber strip material between the core drum and a roller die 12 by eliminating a speed difference between the wind-up speed V1 of the core drum and the pull-out speed V2 of the roller die 12. Also, the cross sectional area of the rubber strip material which has been extruded from a mouthpiece 15 is made smaller by accelerating the wind-up speed V1 and the pull-out speed V2 higher than an extruding speed V3, and stretching the rubber strip material between the mouthpiece 15 and the roller die 12 by applying tension to the rubber strip material. The extruding speed V3 from the mouthpiece 15 is higher than a conventional extruding speed, and therefore, the pulling amount becomes V2/V3<V2/V3', and the pulling amount and the contraction amount in this embodiment can be reduced. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

本発明は、口金からローラダイを介して押し出したゴムを、引っ張りながらドラムに巻き付けるタイヤの製造方法及び製造装置に関する。   The present invention relates to a method and an apparatus for manufacturing a tire in which rubber extruded from a base via a roller die is wound around a drum while being pulled.

一般に、タイヤは、複数のタイヤ用のゴム部材から構成されており、例えばインナーライナー、トレッド部、サイドウォール部等の各部が、各々要求される特性に応じた未加硫ゴムによって形成されている。これらタイヤの各部を構成するゴム部材は、それぞれのゴム部材の断面形状に応じた口金（ダイ）を備えた押出機から未加硫ゴムを押し出して、例えばその押し出した未加硫ゴムを所定の長さにカットしたり、タイヤ成型ドラム上に巻き付けたりして形成される。   Generally, a tire is composed of a plurality of rubber members for tires. For example, each part such as an inner liner, a tread part, and a sidewall part is formed of unvulcanized rubber corresponding to required characteristics. . The rubber member constituting each part of these tires is obtained by extruding unvulcanized rubber from an extruder equipped with a die (die) corresponding to the cross-sectional shape of each rubber member. It is formed by cutting to a length or winding it on a tire molding drum.

押出機でゴムをタイヤ成型ドラム上に巻き付けるとき、ダイから押し出したゴムを各ゴム部材に対応した所望の幅に形成するために、押出機のゴムの押出速度及びタイヤ成型ドラムへの巻き付け速度を制御し、ゴムにかかるテンションを調節して伸縮させることで、ゴムの幅を調整しながら巻き付けることが行われている（例えば、特許文献１参照）。   When the rubber is wound around the tire molding drum by the extruder, the rubber extrusion speed of the extruder and the winding speed around the tire molding drum are adjusted so that the rubber extruded from the die has a desired width corresponding to each rubber member. Winding is performed while adjusting the width of the rubber by controlling and adjusting the tension applied to the rubber to expand and contract (see, for example, Patent Document 1).

しかしながら、このようにゴムにかかるテンションを調節しながらタイヤ成型ドラムに巻き付ける場合、テンションが掛かりすぎると、巻き付けた後のゴムの収縮が大きく各ゴム部材の形状が安定せず、所望の形状のタイヤが得られない場合がある。   However, when winding around a tire molding drum while adjusting the tension applied to the rubber in this way, if the tension is applied too much, the shrinkage of the rubber after winding will be large and the shape of each rubber member will not be stable, and the tire of the desired shape May not be obtained.

そこで、上記ゴムに掛かるテンションを低減させて、ゴムの収縮を抑制しつつタイヤ成型ドラム（コアドラム）に巻き付けることも行われているが、上記押出速度と巻き付け速度との差を小さくして上記テンションを低減させると、ゴムの断面幅（断面積）が広がるため、このゴムを重ねてタイヤ成型ドラムへ貼り付けていく場合、ゴム部材の細部の形状を精度よく形成することが難しいという別の問題が生じる。
特開２００６−３３５０２２号公報 Therefore, the tension applied to the rubber is reduced and wound around a tire molding drum (core drum) while suppressing the shrinkage of the rubber, but the difference between the extrusion speed and the winding speed is reduced to reduce the tension. If the rubber is reduced, the cross-sectional width (cross-sectional area) of the rubber will widen. Therefore, when this rubber is stacked and pasted on the tire molding drum, it is difficult to accurately form the detailed shape of the rubber member. Occurs.
JP 2006-335022 A

本発明は、上記従来の問題を解決するために成されたもので、その目的は、巻き付け時におけるゴムの断面積が拡がるのを抑制しつつ、しかも簡易な構成でタイヤ成型ドラムに貼り付けた後のゴムの収縮量を低減させることである。   The present invention has been made to solve the above-described conventional problems, and its purpose is to suppress the expansion of the cross-sectional area of the rubber during winding, and to stick it to the tire molding drum with a simple configuration. It is to reduce the shrinkage amount of the later rubber.

本願の発明は、押出機の口金から押し出されたゴム部材を引き出して支持体に巻き付けるタイヤの製造方法であって、ゴム部材を前記口金から所定の押出速度で押し出す工程と、押し出したゴム部材を前記所定の速度よりも速い速度で引き出す工程と、引き出されたゴム材料を前記支持体に巻き付ける工程と、を備え、前記支持体への巻き付け時のゴム部材の断面積をＳ１、前記口金の開口部断面積をＳ３としたとき、Ｓ３／Ｓ１が３．５〜２．０となるよう前記口金からのゴム部材の押出速度及び前記引き出し速度を制御することを特徴とする。
本願の他の発明は、押出機の口金から押し出されたゴム部材を引き出して支持体に巻き付けるタイヤの製造方法であって、ゴム部材を前記口金から所定の押出速度で押し出す工程と、押し出したゴム部材を前記所定の速度よりも速い速度で引き出す工程と、引き出されたゴム材料を前記支持体に巻き付ける工程と、を有し、前記支持体への巻き付け時のゴム部材の断面積をＳ１、前記口金の開口部断面積をＳ３としたとき、Ｓ３／Ｓ１が３．３〜２．７となるよう前記口金からのゴム部材の押出速度及び前記引き出し速度を制御することを特徴とする。
また、本願の他の発明は、ゴム部材を所定の断面形状で押し出す口金と、前記口金から押し出されたゴム部材を引き出す引出手段と、前記引出手段が引き出したゴム部材を巻き取る支持体と、を備えたタイヤの製造装置であって、前記口金からゴム部材を押し出す速度及び前記引出手段が前記口金からゴム部材を引き出す速度を制御する制御手段と、を有し、前記支持体への巻き付け時のゴム部材の断面積をＳ１、前記口金の開口部断面積をＳ３としたとき、前記制御手段は、Ｓ３／Ｓ１が３．５〜２．０となるよう前記押出速度と前記引き出し速度を制御することを特徴とする。
さらに、本願の他の発明は、ゴム部材を所定の断面形状で押し出す口金と、前記口金から押し出されたゴム部材を引き出す引出手段と、前記引出手段が引き出したゴム部材を巻き取る支持体と、を備えたタイヤの製造装置であって、前記口金からゴム部材を押し出す速度及び前記引出手段が前記口金からゴム部材を引き出す速度を制御する制御手段と、を有し、前記支持体への巻き付け時のゴム部材の断面積をＳ１、前記口金の開口部断面積をＳ３としたとき、前記制御手段は、Ｓ３／Ｓ１が３．３〜２．７となるよう前記押出速度と前記引き出し速度を制御することを特徴とする。 The invention of the present application is a method for manufacturing a tire in which a rubber member extruded from a die of an extruder is pulled out and wound around a support, the step of extruding the rubber member from the die at a predetermined extrusion speed, and the extruded rubber member A step of drawing out at a speed faster than the predetermined speed, and a step of winding the drawn rubber material around the support, wherein the cross-sectional area of the rubber member at the time of winding on the support is S1, the opening of the base When the partial cross-sectional area is S3, the extrusion speed of the rubber member from the base and the drawing speed are controlled so that S3 / S1 is 3.5 to 2.0.
Another invention of the present application is a method of manufacturing a tire in which a rubber member extruded from a die of an extruder is pulled out and wound around a support, the step of extruding the rubber member from the die at a predetermined extrusion speed, and the extruded rubber A step of pulling out the member at a speed higher than the predetermined speed, and a step of winding the drawn rubber material around the support, wherein the cross-sectional area of the rubber member when wound on the support is S1, When the opening cross-sectional area of the base is S3, the extrusion speed and the drawing speed of the rubber member from the base are controlled so that S3 / S1 is 3.3 to 2.7.
Another invention of the present application is a base for extruding a rubber member in a predetermined cross-sectional shape, a pulling means for pulling out the rubber member pushed out from the base, a support for winding the rubber member pulled out by the pulling means, And a control means for controlling the speed at which the rubber member is pushed out from the base and the speed at which the drawing means pulls out the rubber member from the base, and when the winding is performed on the support body. When the cross-sectional area of the rubber member is S1 and the opening cross-sectional area of the base is S3, the control means controls the extrusion speed and the drawing speed so that S3 / S1 is 3.5 to 2.0. It is characterized by doing.
Furthermore, another invention of the present application is a base for extruding a rubber member in a predetermined cross-sectional shape, a pulling means for pulling out the rubber member pushed out from the base, a support for winding up the rubber member pulled out by the pulling means, And a control means for controlling the speed at which the rubber member is pushed out from the base and the speed at which the drawing means pulls out the rubber member from the base, and when the winding is performed on the support body. When the cross-sectional area of the rubber member is S1 and the cross-sectional area of the opening of the base is S3, the control means controls the extrusion speed and the drawing speed so that S3 / S1 is 3.3 to 2.7. It is characterized by doing.

本発明によれば、タイヤ成型ドラムに貼り付けた後のゴムの収縮量を低減させることができ、安定して所望の形状のゴム部材及びタイヤを製造することができる。   ADVANTAGE OF THE INVENTION According to this invention, the shrinkage amount of the rubber | gum after affixing on a tire molding drum can be reduced, and the rubber member and tire of a desired shape can be manufactured stably.

以下に、本発明の１実施形態について、添付した図面を参照して説明する。
図１は、本実施形態に係るタイヤ製造装置の斜視図である。
このタイヤ製造装置は、タイヤ成型機１と、押出機１０とから構成されている。
タイヤ成型機１は、駆動機構を収納した基台２と、基台の一方の側部から水平に延び上記駆動機構で駆動される回転軸３と、回転軸３の端部に設けられた支持体であるトロイダル形状のコアドラム（積層盤）４とから成っている。
押出機１０は、口金をコアドラム４に向けて配置されており、ホッパー１１に投入されたゴム部材（フィードゴム）を口金より帯状に成型してゴムストリップ材１３として押出し、コアドラム４に向けて供給する。
また、コアドラム４と押出機１０の口金との間には、口金から押し出されたゴムストリップ材１３を引き出して、ゴムストリップ材１３をコアドラム４に押圧すると共に、その断面形状を調節する本願発明の引出手段の実施形態であるローラダイ１２が設けられている。 Hereinafter, an embodiment of the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a perspective view of a tire manufacturing apparatus according to this embodiment.
The tire manufacturing apparatus includes a tire molding machine 1 and an extruder 10.
The tire molding machine 1 includes a base 2 that houses a drive mechanism, a rotary shaft 3 that extends horizontally from one side of the base, and that is driven by the drive mechanism, and a support provided at the end of the rotary shaft 3. It consists of a toroidal core drum (laminate) 4 which is the body.
The extruder 10 is arranged with the die facing the core drum 4, and a rubber member (feed rubber) charged into the hopper 11 is molded into a band shape from the die, extruded as a rubber strip material 13, and supplied toward the core drum 4. To do.
In addition, the rubber strip material 13 pushed out from the die is pulled out between the core drum 4 and the die of the extruder 10, and the rubber strip material 13 is pressed against the core drum 4 and the sectional shape thereof is adjusted. A roller die 12 which is an embodiment of the drawing means is provided.

押出機１０は、ローラダイ１２とともに、コアドラム４の回転中心軸方向（図中Ｘ方向）及び回転中心軸方向と直角方向（図中Ｙ方向）に移動でき、また鉛直軸（Ｘ及びＹ方向に対して直角方向の軸）を中心にθ方向に回動して押出す向きを変えることができる。
従って、押出機１０は、位置及び向きを変更することで、コアドラム４の外周面から側面までゴムストリップ材１３を供給し、螺旋状に巻き付けることができる。 The extruder 10 can move together with the roller die 12 in the rotation center axis direction of the core drum 4 (X direction in the figure) and in the direction perpendicular to the rotation center axis direction (Y direction in the figure), and with respect to the vertical axis (X and Y directions). Thus, the direction of extrusion can be changed by rotating in the θ direction around a right-angled axis).
Therefore, the extruder 10 can supply the rubber strip material 13 from the outer peripheral surface to the side surface of the core drum 4 by changing the position and orientation, and can be wound spirally.

成型装置１は、コアドラム４を回転させるドラム駆動モータなどの駆動機構を備えており、押出機１０は、ゴムを押し出すためのスクリューを回転する押出用モータ及び押出機１０の位置及び向きを変更する移動を行うための移動モータを備えている。これらの各モータを制御するためのコンピュータによる制御装置３０が設けられており、制御装置３０は、ドラム回転モータドライバ３１、押出モータドライバ３２、移動モータドライバ３３に各制御信号を出力し、各ドライバは上記各モータを駆動制御する。   The molding apparatus 1 includes a drive mechanism such as a drum drive motor that rotates the core drum 4, and the extruder 10 changes the position and orientation of the extruder 10 and the extruder 10 that rotate a screw for extruding rubber. A moving motor for moving is provided. A computer control device 30 for controlling each of these motors is provided, and the control device 30 outputs each control signal to the drum rotation motor driver 31, the extrusion motor driver 32, and the moving motor driver 33, and each driver. Controls driving of the motors.

図２は、ビードフィラーの製造に用いる押出機１０の口金部分及びコアドラムの巻き付け部分の拡大図である。
ホッパー１１に投入されたフィードゴムは、図示しないスクリュー及びギアポンプによって定量ずつ口金１５から押し出される。押し出されたゴムは、回転するローラダイ１２及びコアドラム４によって、コアドラム４の側面に巻き付けられ、ビードフィラーが製造される。 FIG. 2 is an enlarged view of the die portion of the extruder 10 and the winding portion of the core drum used for manufacturing the bead filler.
The feed rubber thrown into the hopper 11 is pushed out from the base 15 by a fixed amount by a screw and a gear pump (not shown). The extruded rubber is wound around the side surface of the core drum 4 by the rotating roller die 12 and the core drum 4 to produce a bead filler.

ここで、本実施形態では、製造するタイヤのゴム部材（例えば、ビードフィラーなど）の細部の形状を精度よく形成できるようにするために、押出機１０の口金１５の開口部断面積を小さくして、押し出すゴムの断面積（断面幅）を従来よりも小さくしている。
即ち、従来装置の口金の開口部断面積をＳ３’、押出速度（単位時間当たりに押し出すストリップゴム材の長さ）をＶ３’とし、本実施形態の押出機１０の口金１５の開口部断面積をＳ３、押出速度をＶ３とすると、単位時間当たりのゴム押出量（ｃｃ／ｍｉｎ）は口金の開口部断面積（ｃｍ２）に押出速度（ｍ／ｍｉｎ）を乗じた値であることから、単位時間当たりのゴム押出量を従来装置と本実施形態の押出機１０とで同量とした場合、
Ｓ３’×Ｖ３’＝Ｓ３×Ｖ３ ・・・（１）
であり、ここでＳ３＜Ｓ３’であると、
Ｖ３＞Ｖ３’ ・・・（２）
となる。即ち、本実施形態の押出機１０は、従来に比して押出速度が速くなる。 Here, in this embodiment, in order to be able to accurately form the detailed shape of the rubber member (for example, a bead filler) of the tire to be manufactured, the opening cross-sectional area of the base 15 of the extruder 10 is reduced. Thus, the cross-sectional area (cross-sectional width) of the extruded rubber is made smaller than before.
That is, the opening cross-sectional area of the base of the conventional apparatus is S3 ′, the extrusion speed (the length of the strip rubber material extruded per unit time) is V3 ′, and the cross-sectional area of the opening of the base 15 of the extruder 10 of the present embodiment. S3 and the extrusion speed is V3, the rubber extrusion rate per unit time (cc / min) is a value obtained by multiplying the opening cross-sectional area (cm 2 ) of the die by the extrusion speed (m / min). When the amount of rubber extrusion per unit time is the same in the conventional apparatus and the extruder 10 of this embodiment,
S3 ′ × V3 ′ = S3 × V3 (1)
Where S3 <S3 ′,
V3> V3 '(2)
It becomes. That is, the extrusion speed of the extruder 10 of the present embodiment is higher than that of the conventional one.

図３は、本実施形態におけるコアドラム４の巻き取り速度（ｍ／ｍｉｎ）、ローラダイ１２の引き出し速度（ｍ／ｍｉｎ）及び口金１５からのゴム押出速度（ｍ／ｍｉｎ）の関係を説明する図である。
コアドラム４の巻き取り速度（ｍ／ｍｉｎ）をＶ１、ローラダイ１２の引き出し速度（ｍ／ｍｉｎ）をＶ２、口金１５からのゴム押出速度（ｍ／ｍｉｎ）を上述したようにＶ３として、Ｖ１＝Ｖ２として同速度で巻き取る。即ち、コアドラム４の巻き取り速度とローラダイ１２の引き出し速度との速度差をなくすことで、コアドラム４とローラダイ１２間でのゴムストリップ材１３に対するテンションをかけないようにしている。 FIG. 3 is a diagram for explaining the relationship among the winding speed (m / min) of the core drum 4, the drawing speed (m / min) of the roller die 12 and the rubber extrusion speed (m / min) from the base 15 in this embodiment. is there.
Assuming that the winding speed (m / min) of the core drum 4 is V1, the drawing speed (m / min) of the roller die 12 is V2, and the rubber extrusion speed (m / min) from the base 15 is V3 as described above, V1 = V2 Take up at the same speed. That is, by eliminating the speed difference between the winding speed of the core drum 4 and the drawing speed of the roller die 12, no tension is applied to the rubber strip material 13 between the core drum 4 and the roller die 12.

また、従来と同様にコアドラム４の巻き取り速度Ｖ１とローラダイ１２の引き出し速度Ｖ２を、押出速度Ｖ３よりも速くして、口金１５とローラダイ１２間のゴムストリップ材１３にはテンションをかけて伸ばすことで、従来よりも開口部断面積を小さくした口金１５から押し出されたゴムストリップ材１３の断面積をさらに小さくする。
ここで、口金１５とローラダイ１２間におけるゴムストリップ材１３にかかるテンションにより、ゴムストリップ材１３がローラダイ１２に引っ張られる度合いは、
Ｖ２／Ｖ３ ・・・（３）
で表すことができる。この値をここでは引っ張り量という。
この引っ張り量が大きいほど、ゴムストリップ材１３をコアドラム４に巻き付けた後の収縮する量が大きい。 Further, the winding speed V1 of the core drum 4 and the drawing speed V2 of the roller die 12 are made faster than the extrusion speed V3 as in the conventional case, and the rubber strip material 13 between the die 15 and the roller die 12 is stretched with tension. Thus, the cross-sectional area of the rubber strip member 13 extruded from the base 15 having a smaller opening cross-sectional area than that of the conventional one is further reduced.
Here, the degree to which the rubber strip material 13 is pulled by the roller die 12 due to the tension applied to the rubber strip material 13 between the base 15 and the roller die 12 is as follows.
V2 / V3 (3)
Can be expressed as This value is called the amount of pulling here.
The larger the amount of pulling, the larger the amount of shrinkage after the rubber strip material 13 is wound around the core drum 4.

ここで、上述したように、従来よりも開口部断面積を小さくした口金１５からの押出速度Ｖ３は、従来の押出速度Ｖ３’よりも大きいことから（式（２）参照）、従来装置におけるコアドラム及びローラダイの巻き取り速度を本実施形態における巻き取り速度と同速度にした場合の、従来装置と本実施形態の装置との引っ張り量の関係は、
Ｖ２／Ｖ３＜Ｖ２／Ｖ３’ ・・・（４）
となる。
従って、本実施形態における引っ張り量を従来のものよりも低減することができ、この引っ張りに起因するコアドラム４に巻き付けた後のゴムストリップ材１３の収縮を抑制することができる。 Here, as described above, the extrusion speed V3 from the base 15 having the opening cross-sectional area smaller than that of the conventional one is higher than the conventional extrusion speed V3 ′ (see the formula (2)), so that the core drum in the conventional apparatus is used. And when the winding speed of the roller die is the same as the winding speed in this embodiment, the relationship between the amount of tension between the conventional apparatus and the apparatus of this embodiment is as follows:
V2 / V3 <V2 / V3 ′ (4)
It becomes.
Therefore, the amount of tension in this embodiment can be reduced as compared with the conventional one, and the shrinkage of the rubber strip material 13 after being wound around the core drum 4 due to this tension can be suppressed.

以上の手順でコアドラム４にゴムを巻き付けて形成したビードフィラーは、同様の方法で形成されたその他のゴム部材（カーカス、トレッド部など）とともに、その後加硫機にて加硫されて製品タイヤになる。
なお、上記口金１５のサイズは、開口部断面積が小さくなることによる圧力上昇とゴム詰まりの虞、及びコアドラム４に巻き付けるときのゴムの断面積を考慮して決定する。即ち、上記コアドラム４に巻き付けるときのゴムの断面積をＳ１としたとき、口金１５の開口部断面積Ｓ３とゴムの断面積Ｓ１との関係は、Ｓ３／Ｓ１が３．５〜２．０、特に３．３〜２．７となるように、口金１５のサイズを調節し、口金１５の押出速度とローラダイ１２の引き出し速度を制御することが望ましい。 The bead filler formed by wrapping rubber around the core drum 4 by the above procedure is vulcanized by a vulcanizer together with other rubber members (carcass, tread portion, etc.) formed by the same method to produce a product tire. Become.
The size of the base 15 is determined in consideration of the pressure increase and rubber clogging due to the reduced opening cross-sectional area, and the cross-sectional area of the rubber when wound around the core drum 4. That is, when the cross-sectional area of the rubber when wound around the core drum 4 is S1, the relationship between the opening cross-sectional area S3 of the base 15 and the cross-sectional area S1 of the rubber is S3 / S1 of 3.5 to 2.0, In particular, it is desirable to adjust the size of the die 15 to control the extrusion speed of the die 15 and the drawing speed of the roller die 12 so as to be 3.3 to 2.7.

（実施例）
本発明の効果を確認するため、本発明における実施品である口金（以下、口金ａという）を用いたタイヤ製造装置（以下、タイヤ製造装置ａという）と、従来の比較品である口金（以下、口金ｂという）を用いたタイヤ製造装置（以下、タイヤ製造装置ｂという）とで上記引っ張り量を比較する。
本実施例では、口金ａの開口面積を０．２ｃｍ２、口金ｂの開口面積を０．０４ｃｍ２とし、両タイヤ製造装置ａ，ｂともに単位時間当たりのゴム押出量は同一である。
また、口金ａの押出速度をＶ３ａ（ｍ／ｍｉｎ）、口金ｂの押出速度をＶ３ｂ（ｍ／ｍｉｎ）とし、両タイヤ製造装置ａ，ｂの、コアドラム及びローラダイの巻き取り速度（Ｖ１及びＶ２）は同一とする。 (Example)
In order to confirm the effect of the present invention, a tire manufacturing apparatus (hereinafter referred to as a tire manufacturing apparatus a) using a base (hereinafter referred to as a base a) that is an embodiment of the present invention and a conventional comparative product (hereinafter referred to as a tire manufacturing apparatus a). The tension amount is compared with a tire manufacturing apparatus (hereinafter referred to as a tire manufacturing apparatus b) using a base b).
In this embodiment, 0.2 cm 2 of the opening area of the base a, the opening area of the mouthpiece b and 0.04 cm 2, rubber extrusion amount per two tire building apparatuses a, b both unit time is the same.
Further, the extrusion speed of the base a is V3a (m / min), the extrusion speed of the base b is V3b (m / min), and the winding speeds (V1 and V2) of the core drum and the roller die of both tire manufacturing apparatuses a and b. Are the same.

各タイヤ製造装置ａ，ｂのゴムの押出量が同一であるから、上記式（１）より、
０．０４×Ｖ３ａ＝０．２×Ｖ３ｂ ・・・（５）
であり、また上記式（３）より、タイヤ製造装置ａの引っ張り量はＶ２／Ｖ３ａ、タイヤ製造装置ｂの引っ張り量はＶ２／Ｖ３ｂとなる。従って、タイヤ製造装置ｂに対するタイヤ製造装置ａの引っ張り量の比は、
Ｖ３ｂ／Ｖ３ａ ・・・（６）
であることから、式（５）と式（６）により、Ｖ３ｂ／Ｖ３ａ＝０．２となる。
以上より、タイヤ製造装置ａの引っ張り量は、従来のタイヤ製造装置ｂに比して８０％低減されることがわかった。 Since the rubber extrusion amounts of the tire manufacturing devices a and b are the same, from the above formula (1),
0.04 × V3a = 0.2 × V3b (5)
From the above formula (3), the tire manufacturing device a has a pulling amount of V2 / V3a, and the tire manufacturing device b has a pulling amount of V2 / V3b. Therefore, the ratio of the pull amount of the tire manufacturing apparatus a to the tire manufacturing apparatus b is
V3b / V3a (6)
Therefore, V3b / V3a = 0.2 from Equation (5) and Equation (6).
From the above, it has been found that the pull amount of the tire manufacturing apparatus a is reduced by 80% compared to the conventional tire manufacturing apparatus b.

（形状変化量測定試験）
上記口金ａ、ｂを用いてゴムをコアドラム４に巻き付けてビードフィラーを形成した後、ビードフィラーを積層板から剥がし取り、それぞれのゴムの収縮によって生じる湾曲量（形状変化量）を計測した。なお、この試験は異なる物性を有する２種のゴム（ゴム（１）、ゴム（２））に対して行った。 (Shape change measurement test)
After the rubber was wound around the core drum 4 using the caps a and b to form a bead filler, the bead filler was peeled off from the laminated plate, and the amount of bending (the amount of change in shape) caused by the contraction of each rubber was measured. This test was performed on two types of rubbers (rubber (1) and rubber (2)) having different physical properties.

図４は、本試験の結果を示したグラフ（図）である。
本グラフは、縦軸に湾曲量（ｍｍ）、横軸にゴムを剥がし取ってからの経過時間（秒）を示している。
図示のように、同種のゴムにおいての比較では、本発明の実施品である口金ａにて押し出したゴムの湾曲量は常に比較品である口金ｂにて押し出したゴムの湾曲量以下に抑えられている。
また、経過時間が３０秒の時点では、口金ａと口金ｂとの湾曲量の差が最も大きく、口金ａにて押し出したゴム（１）の湾曲量は、従来の口金ｂにて押し出したゴム（１）の湾曲量に比して１０％〜１５％程度抑制され、ゴム（２）に関しては２５％程度抑制されている。 FIG. 4 is a graph (figure) showing the results of this test.
In this graph, the vertical axis indicates the amount of bending (mm), and the horizontal axis indicates the elapsed time (seconds) after the rubber is peeled off.
As shown in the figure, in the comparison with the same type of rubber, the amount of curvature of the rubber extruded by the base a which is the product of the present invention is always kept below the amount of curvature of the rubber extruded by the base b which is a comparative product. ing.
Further, when the elapsed time is 30 seconds, the difference in the amount of bending between the base a and the base b is the largest, and the amount of bending of the rubber (1) extruded by the base a is the rubber extruded by the conventional base b. It is suppressed by about 10% to 15% as compared with the bending amount of (1), and about 25% is suppressed for rubber (2).

以上で説明したように、本実施形態のタイヤ製造装置は、口金１５を従来よりも開口部断面積を小さくしただけで、引っ張り量を低減できると共に、ゴムの収縮も抑制することができる。
また、従来のコアドラム４及びダイローラ１２の巻き取り速度（Ｖ１及びＶ２）を変更していないため、ゴム押出量を従来装置と本実施形態の押出機１０とで同量とすれば、コアドラム４へのゴムの貼付に要する時間は従来と変わらない。
本発明は、あらゆる引っ張り貼り付け製法及び部材に適用することができる。 As described above, the tire manufacturing apparatus according to the present embodiment can reduce the amount of pulling and suppress the shrinkage of rubber only by reducing the opening cross-sectional area of the base 15 as compared with the related art.
Further, since the winding speeds (V1 and V2) of the conventional core drum 4 and the die roller 12 are not changed, if the rubber extrusion amount is the same in the conventional apparatus and the extruder 10 of the present embodiment, the core drum 4 is transferred. The time required for sticking rubber is the same as before.
The present invention can be applied to all pull-paste manufacturing methods and members.

なお、本実施形態では、ゴムストリップ材を用いているが、これを所定の長さに切断してリボン状にしたものを用いてもよい。   In this embodiment, the rubber strip material is used. However, a rubber strip material cut into a predetermined length may be used.

本実施形態に係るタイヤ製造装置の斜視図である。It is a perspective view of the tire manufacturing apparatus concerning this embodiment. 押出機の口金部分及びコアドラムの巻き付け部分の拡大図である。It is an enlarged view of the nozzle | cap | die part of an extruder, and the winding part of a core drum. コアドラム及びローラダイの巻き取り速度、口金からのゴム押出速度の関係を説明する図である。It is a figure explaining the relationship between the winding speed of a core drum and a roller die, and the rubber extrusion speed from a nozzle | cap | die. 形状変化量測定試験の結果を示したグラフ（図）である。It is the graph (diagram) which showed the result of the shape change amount measurement test.

符号の説明Explanation of symbols

１・・・成型装置、２・・・基台、３・・・回転軸、４・・・コアドラム、１０・・・押出機、１１・・・ホッパー、１２・・・ローラダイ、１３・・・ゴムストリップ材、１５・・・口金、３０・・・制御装置、３１・・・ドラム回転モータドライバ、３２・・・押出モータドライバ、３３・・・移動モータドライバ。 DESCRIPTION OF SYMBOLS 1 ... Molding apparatus, 2 ... Base, 3 ... Rotating shaft, 4 ... Core drum, 10 ... Extruder, 11 ... Hopper, 12 ... Roller die, 13 ... Rubber strip material, 15 ... base, 30 ... control device, 31 ... drum rotation motor driver, 32 ... extrusion motor driver, 33 ... moving motor driver.

Claims (6)

押出機の口金から押し出されたゴム部材を引き出して支持体に巻き付けるタイヤの製造方法であって、
ゴム部材を前記口金から所定の押出速度で押し出す工程と、
押し出したゴム部材を前記所定の速度よりも速い速度で引き出す工程と、
引き出されたゴム材料を前記支持体に巻き付ける工程と、を備え、
前記支持体への巻き付け時のゴム部材の断面積をＳ１、前記口金の開口部断面積をＳ３としたとき、
Ｓ３／Ｓ１が３．５〜２．０となるよう前記口金からのゴム部材の押出速度及び前記引き出し速度を制御することを特徴とするタイヤの製造方法。 A method of manufacturing a tire for pulling out a rubber member extruded from a die of an extruder and winding it on a support,
Extruding a rubber member from the die at a predetermined extrusion speed;
Pulling out the extruded rubber member at a speed faster than the predetermined speed;
Winding the drawn rubber material around the support, and
When the cross-sectional area of the rubber member at the time of winding on the support is S1, and the opening cross-sectional area of the base is S3,
A method for manufacturing a tire, wherein the extrusion speed of the rubber member from the die and the drawing speed are controlled so that S3 / S1 is 3.5 to 2.0. 押出機の口金から押し出されたゴム部材を引き出して支持体に巻き付けるタイヤの製造方法であって、
ゴム部材を前記口金から所定の押出速度で押し出す工程と、
押し出したゴム部材を前記所定の速度よりも速い速度で引き出す工程と、
引き出されたゴム材料を前記支持体に巻き付ける工程と、を備え、
前記支持体への巻き付け時のゴム部材の断面積をＳ１、前記口金の開口部断面積をＳ３としたとき、
Ｓ３／Ｓ１が３．３〜２．７となるよう前記口金からのゴム部材の押出速度及び前記引き出し速度を制御することを特徴とするタイヤの製造方法。 A method of manufacturing a tire for pulling out a rubber member extruded from a die of an extruder and winding it on a support,
Extruding a rubber member from the die at a predetermined extrusion speed;
Pulling out the extruded rubber member at a speed faster than the predetermined speed;
Winding the drawn rubber material around the support, and
When the cross-sectional area of the rubber member at the time of winding on the support is S1, and the opening cross-sectional area of the base is S3,
A method for manufacturing a tire, characterized by controlling an extrusion speed and a drawing speed of a rubber member from the base so that S3 / S1 is 3.3 to 2.7. 請求項１又は２に記載されたタイヤの製造方法において、
前記引き出す工程での前記ゴム部材を口金から引き出す速度と、前記巻き付ける工程での前記支持体に巻き付ける速度が同速度となるよう制御するタイヤの製造方法。 In the tire manufacturing method according to claim 1 or 2,
A method for manufacturing a tire, wherein the speed at which the rubber member is pulled out from the die in the drawing step and the speed at which the rubber member is wound around the support in the winding step are controlled to be the same speed. ゴム部材を所定の断面形状で押し出す口金と、前記口金から押し出されたゴム部材を引き出す引出手段と、前記引出手段が引き出したゴム部材を巻き取る支持体と、を備えたタイヤの製造装置であって、
前記口金からゴム部材を押し出す速度及び前記引出手段が前記口金からゴム部材を引き出す速度を制御する制御手段と、を有し、
前記支持体への巻き付け時のゴム部材の断面積をＳ１、前記口金の開口部断面積をＳ３としたとき、前記制御手段は、Ｓ３／Ｓ１が３．５〜２．０となるよう前記押出速度と前記引き出し速度を制御することを特徴とするタイヤの製造装置。 A tire manufacturing apparatus comprising: a base that extrudes a rubber member in a predetermined cross-sectional shape; a pull-out means that pulls out the rubber member pushed out from the base; and a support that winds up the rubber member pulled out by the pull-out means. And
Control means for controlling the speed at which the rubber member is pushed out from the base and the speed at which the drawing means pulls out the rubber member from the base;
When the cross-sectional area of the rubber member at the time of winding on the support is S1, and the cross-sectional area of the opening of the base is S3, the control means performs the extrusion so that S3 / S1 is 3.5 to 2.0. A tire manufacturing apparatus that controls a speed and a drawing speed. ゴム部材を所定の断面形状で押し出す口金と、前記口金から押し出されたゴム部材を引き出す引出手段と、前記引出手段が引き出したゴム部材を巻き取る支持体と、を備えたタイヤの製造装置であって、
前記口金からゴム部材を押し出す速度及び前記引出手段が前記口金からゴム部材を引き出す速度を制御する制御手段と、を有し、
前記支持体への巻き付け時のゴム部材の断面積をＳ１、前記口金の開口部断面積をＳ３としたとき、前記制御手段は、Ｓ３／Ｓ１が３．３〜２．７となるよう前記押出速度と前記引き出し速度を制御することを特徴とするタイヤの製造装置。 A tire manufacturing apparatus comprising: a base that extrudes a rubber member in a predetermined cross-sectional shape; a pull-out means that pulls out the rubber member pushed out from the base; and a support that winds up the rubber member pulled out by the pull-out means. And
Control means for controlling the speed at which the rubber member is pushed out from the base and the speed at which the drawing means pulls out the rubber member from the base;
When the cross-sectional area of the rubber member at the time of winding on the support is S1, and the cross-sectional area of the opening of the base is S3, the control means performs the extrusion so that S3 / S1 is 3.3 to 2.7. A tire manufacturing apparatus that controls a speed and a drawing speed. 請求項４又は５に記載されたタイヤの製造装置において、
前記制御手段が、前記引出手段が口金からゴム部材を引き出す速度と、前記支持体がゴム部材を巻き取る速度とが同速度となるよう制御するタイヤの製造方法。 In the tire manufacturing apparatus according to claim 4 or 5,
A method of manufacturing a tire, wherein the control means controls the speed at which the drawing means pulls out the rubber member from the die and the speed at which the support winds up the rubber member to be the same speed.
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JP2006116835A (en) * 2004-10-22 2006-05-11 Bridgestone Corp Rubber weight detection system and weight detection method
JP2006335022A (en) * 2005-06-06 2006-12-14 Bridgestone Corp Laminate molding method of rubber strip
JP2007106354A (en) * 2005-10-17 2007-04-26 Bridgestone Corp Pneumatic tire, and method and apparatus for molding tire

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EP3397472A4 (en) * 2015-12-30 2019-09-04 Bridgestone Americas Tire Operations, LLC Tire with pre-formed ribbon tread and method of making same

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