JP5464748B2 - Bead member manufacturing apparatus and manufacturing method - Google Patents

Bead member manufacturing apparatus and manufacturing method Download PDF

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Publication number
JP5464748B2
JP5464748B2 JP2010125700A JP2010125700A JP5464748B2 JP 5464748 B2 JP5464748 B2 JP 5464748B2 JP 2010125700 A JP2010125700 A JP 2010125700A JP 2010125700 A JP2010125700 A JP 2010125700A JP 5464748 B2 JP5464748 B2 JP 5464748B2
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Prior art keywords
rubber
molded body
bead
bead core
rubber molded
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JP2011251440A (en
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裕一郎 小川
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Bridgestone Corp
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Bridgestone Corp
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Priority to JP2010125700A priority Critical patent/JP5464748B2/en
Priority to PCT/JP2011/057661 priority patent/WO2011152107A1/en
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    • 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
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/04—Particle-shaped
    • 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
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • B29C48/325—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections
    • B29C48/327—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles being adjustable, i.e. having adjustable exit sections with centering means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2021/00—Use of unspecified rubbers as moulding material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00—Other particular articles
    • B29L2031/001—Profiled members, e.g. beams, sections
    • B29L2031/003—Profiled members, e.g. beams, sections having a profiled transverse cross-section

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Tyre Moulding (AREA)

Description

本発明は、環状のビードコアに、スティフナ等を構成するゴム成形体を配置して、タイヤのビード部に配置されるビード部材を製造するビード部材の製造装置及び製造方法に関する。   The present invention relates to a bead member manufacturing apparatus and a manufacturing method for manufacturing a bead member disposed in a bead portion of a tire by disposing a rubber molded body constituting a stiffener or the like on an annular bead core.

未加硫タイヤの製造工程では、予め環状のビードコアの外周にゴム成形体を貼り付けてビード部材を形成した後、成形中の未加硫タイヤの側面にビード部材を配置して、未加硫タイヤを製造することが行われている。また、従来、スティフナ等のゴムを円筒状に形成した後にビードコアの外周に貼り付けて、ビード部材を製造する装置が知られている（特許文献１、２、３参照）。   In the manufacturing process of the unvulcanized tire, a rubber molded body is previously attached to the outer periphery of the annular bead core to form a bead member, and then the bead member is disposed on the side surface of the unvulcanized tire being molded, Tires are manufactured. Conventionally, an apparatus for manufacturing a bead member by forming rubber such as a stiffener in a cylindrical shape and then pasting it on the outer periphery of a bead core is known (see Patent Documents 1, 2, and 3).

ところが、これら従来の装置では、円筒状のゴムを拡開させて円盤状に変形させながらビードコアの外周に貼り付けるため、複雑な作業や工程を行う必要があり、ゴムの成形からビードコアへの貼り付けまでの工程も多くなる。そのため、ビード部材の製造に要する手間や時間が増加する傾向があり、生産性の向上が求められている。   However, in these conventional apparatuses, it is necessary to perform complicated operations and processes because the cylindrical rubber is expanded and bonded to the outer periphery of the bead core while being deformed into a disk shape. The number of processes up to attaching is also increased. Therefore, the labor and time required for manufacturing the bead member tend to increase, and improvement in productivity is required.

これに対し、従来、リボン状ゴムをビードコアの外周から半径方向外側に向かって積層して環状のスティフナを形成し、ビードコアとスティフナからなるビード部材を製造する装置も知られている（特許文献４参照）。   On the other hand, conventionally, an apparatus for manufacturing a bead member including a bead core and a stiffener by laminating a ribbon-shaped rubber from the outer periphery of the bead core toward the radially outer side to form an annular stiffener is also known (Patent Document 4). reference).

しかしながら、この従来の装置では、リボン状ゴムの積層数に応じてスティフナの形成時間が長くなるため、ビード部材の生産性を向上させるのは難しい。また、リボン状ゴムの積層で形成できる断面形状（積層コンター）は、リボン状ゴムの断面形状や積層態様等により制限を受けるため、設計の自由度が低くなることがある。更に、積層されたリボン状ゴム間にエアが入り込んだときには、形成後のスティフナ内にエアが入る可能性もあり、ビード部材に発生する欠陥をより確実に抑制する観点からも改良の余地がある。   However, in this conventional apparatus, it takes a long time to form the stiffener in accordance with the number of ribbon-shaped rubber layers, and it is difficult to improve the productivity of the bead member. Moreover, since the cross-sectional shape (lamination contour) that can be formed by laminating ribbon-like rubber is limited by the cross-sectional shape and lamination mode of the ribbon-like rubber, the degree of freedom in design may be low. Furthermore, when air enters between the laminated ribbon-like rubbers, there is a possibility that air may enter the stiffener after formation, and there is room for improvement from the viewpoint of more reliably suppressing defects generated in the bead member. .

特開平６−３１６００３号公報JP-A-6-316003 特開２００２−５２６２４号公報JP 2002-52624 A 特開２００４−６６５６８号公報JP 2004-66568 A 特開２００７−７６２３３号公報JP 2007-76233 A

本発明は、このような従来の問題に鑑みなされたものであり、その目的は、ビード部材に欠陥が発生するのを抑制するとともに、ビードコアにゴム成形体を簡単に配置し、ビード部材の製造にかかる時間を短縮して生産性を向上させることである。   The present invention has been made in view of such a conventional problem, and an object of the present invention is to suppress the occurrence of defects in the bead member, and to easily arrange a rubber molded body on the bead core, thereby manufacturing the bead member. It is to improve productivity by shortening the time taken for.

本発明は、環状のビードコアに、押出機で成形したゴム成形体を配置して、ビードコアとゴム成形体とを有するビード部材を製造するビード部材の製造装置であって、押出機が、ゴムを開口部から押し出してゴム成形体を成形する口金と、口金の開口部に設けられて、ゴム成形体にビードコアがはめ込まれる空所を形成する空所形成部材と、を備えていることを特徴とする。
また、本発明は、環状のビードコアにゴム成形体を配置して、ビードコアとゴム成形体とを有するビード部材を製造するビード部材の製造方法であって、ゴムの押出成形により、ビードコアがはめ込まれる空所が形成されたゴム成形体を成形する工程と、ゴム成形体の空所にビードコアをはめ込んで、ビードコアにゴム成形体を配置する工程と、を有することを特徴とする。 The present invention is a bead member manufacturing apparatus for manufacturing a bead member having a bead core and a rubber molded body by arranging a rubber molded body molded by an extruder on an annular bead core, and the extruder includes a rubber A base for forming a rubber molded body by extruding from the opening, and a void forming member provided in the opening of the base and forming a void in which a bead core is fitted into the rubber molded body. To do.
The present invention also relates to a method for manufacturing a bead member in which a rubber molded body is disposed on an annular bead core to manufacture a bead member having a bead core and a rubber molded body, and the bead core is fitted by rubber extrusion molding. The method includes a step of molding a rubber molded body in which a void is formed, and a step of placing a bead core in the void of the rubber molded body and disposing the rubber molded body in the bead core.

本発明によれば、ビード部材に欠陥が発生するのを抑制できるとともに、ビードコアにゴム成形体を簡単に配置でき、ビード部材の製造にかかる時間を短縮して生産性を向上させることができる。   ADVANTAGE OF THE INVENTION According to this invention, while it can suppress that a defect generate | occur | produces in a bead member, a rubber molding can be easily arrange | positioned to a bead core, the time concerning manufacture of a bead member can be shortened, and productivity can be improved.

本実施形態のビード部材の製造装置の概略構成を示す側面図である。It is a side view which shows schematic structure of the manufacturing apparatus of the bead member of this embodiment. 押出機の口金付近を拡大して示す図である。It is a figure which expands and shows the nozzle | cap | die vicinity of an extruder. ゴム成形体の断面図である。It is sectional drawing of a rubber molding. ゴム成形体の先端部を示す斜視図である。It is a perspective view which shows the front-end | tip part of a rubber molding. ゴム成形体の巻取機を示す斜視図である。It is a perspective view which shows the winder of a rubber molding. 空所形成部材の他の形状例を示す図である。It is a figure which shows the other example of a shape of a void formation member. 空所形成部材の他の配置位置の例を示す図である。It is a figure which shows the example of the other arrangement position of a void formation member. 蓋状ゴムを有するゴム成形体の断面図である。It is sectional drawing of the rubber molding which has a lid-like rubber.

以下、本発明のビード部材の製造装置と製造方法の一実施形態について、図面を参照して説明する。
図１は、本実施形態のビード部材の製造装置（以下、製造装置という）の概略構成を示す側面図である。また、図１では、押出機１０の内部を透視して、内部構成の一部を点線で示している。 Hereinafter, an embodiment of a manufacturing apparatus and a manufacturing method of a bead member of the present invention is described with reference to drawings.
FIG. 1 is a side view illustrating a schematic configuration of a bead member manufacturing apparatus (hereinafter referred to as a manufacturing apparatus) according to the present embodiment. Moreover, in FIG. 1, the inside of the extruder 10 is seen through, and a part of internal structure is shown with the dotted line.

製造装置１は、図示のように、ビードコア７１を保持して周方向に回転させる回転装置２と、回転装置２の半径方向外側に配置された押出機１０とを備えている。製造装置１は、環状のビードコア７１に、押出機１０でゴムを押し出して成形したゴム成形体８０を配置（図１では、配置後のゴム成形体８０を鎖線で示す）して、ビードコア７１とゴム成形体８０とを有するビード部材７０を製造する。   As shown in the figure, the manufacturing apparatus 1 includes a rotating device 2 that holds a bead core 71 and rotates the bead core 71 in the circumferential direction, and an extruder 10 that is disposed radially outward of the rotating device 2. The manufacturing apparatus 1 arranges a rubber molded body 80 formed by extruding rubber with an extruder 10 in an annular bead core 71 (in FIG. 1, the rubber molded body 80 after arrangement is indicated by a chain line), A bead member 70 having a rubber molded body 80 is manufactured.

なお、ビード部材７０は、少なくとも、ビードコア７１と、ビードコア７１の周囲に配置されたゴム成形体８０とを有するタイヤ構成部材であり、未加硫タイヤの製造に用いられて、タイヤのビード部を中心に配置される。また、ビードコア７１は、スチール等からなる複数のワイヤを束ねて、所定の断面形状の環状に形成された後に回転装置２へ供給される。ゴム成形体８０は、未加硫のゴムにより成形されて、ビードコア７１の周囲に設けられるゴム部材であり、ビードコア７１の周方向に沿って一周配置されて、ビードコア７１に貼り付けられる。このゴム成形体８０は、例えば、ビードコア７１の外周に配置されてスティフナ（又はビードフィラ）等の外周部材となる。ここでは、ゴム成形体８０は、ビード部材７０の外周面側が、なだらかな湾曲面状をなす形状に成形され、ビードコア７１を囲んで環状に形成される。一方、ビードコア７１は、断面矩形状に形成されて、回転装置２により保持される。   The bead member 70 is a tire constituent member having at least a bead core 71 and a rubber molded body 80 disposed around the bead core 71. The bead member 70 is used for manufacturing an unvulcanized tire, and the bead portion of the tire is used. Placed in the center. The bead core 71 is bundled with a plurality of wires made of steel or the like and formed into an annular shape with a predetermined cross-sectional shape, and then supplied to the rotating device 2. The rubber molded body 80 is a rubber member that is molded from unvulcanized rubber and is provided around the bead core 71. The rubber molded body 80 is disposed around the bead core 71 in the circumferential direction and is attached to the bead core 71. The rubber molded body 80 is disposed on the outer periphery of the bead core 71 and serves as an outer peripheral member such as a stiffener (or bead filler). Here, the rubber molded body 80 is formed in a shape in which the outer peripheral surface side of the bead member 70 has a gentle curved surface shape, and surrounds the bead core 71 in an annular shape. On the other hand, the bead core 71 is formed in a rectangular cross section and is held by the rotating device 2.

回転装置２は、ビードコア７１を着脱可能に保持する円盤状や円筒状の保持部材２Ａを有し、保持部材２Ａによりビードコア７１を環状の形状で保持して、ビードコア７１を保持部材２Ａの軸線回りに回転（図１の矢印Ｋ）させる。また、回転装置２は、保持部材２Ａに連結された駆動装置（図示せず）を有し、保持部材２Ａを、駆動装置に設けられたモータ等の駆動源と、その回転動力の伝達機構により回転駆動して、所定の回転速度で回転させて任意の回転角で停止させる。   The rotating device 2 has a disc-like or cylindrical holding member 2A that detachably holds the bead core 71, holds the bead core 71 in an annular shape by the holding member 2A, and holds the bead core 71 around the axis of the holding member 2A. Is rotated (arrow K in FIG. 1). The rotating device 2 has a driving device (not shown) connected to the holding member 2A, and the holding member 2A is driven by a driving source such as a motor provided in the driving device and a transmission mechanism of the rotational power. It is rotated and rotated at a predetermined rotation speed and stopped at an arbitrary rotation angle.

押出機１０は、ゴム成形体８０の供給手段であり、円筒状のシリンダ１１と、駆動装置（図示せず）により駆動されてシリンダ１１内で回転するスクリュ１２と、シリンダ１１内に未加硫ゴムの原料を供給するためのホッパー１３とを備えている。また、押出機１０は、シリンダ１１の先端に固定された押出ヘッド１４と、押出ヘッド１４のゴム吐出口に取り付けられた口金２０とを備え、口金２０が、押出機１０のゴムの押し出し先端部に設けられている。押出機１０は、供給される原料をシリンダ１１内で加熱するとともに、回転するスクリュ１２により混練しながら搬送し、未加硫のゴムを、シリンダ１１と押出ヘッド１４内のゴム流路１５内で流動させて、口金２０の開口部（ゴム押出口）２１から所定量ずつ連続して押し出す。   The extruder 10 is a means for supplying the rubber molded body 80, and includes a cylindrical cylinder 11, a screw 12 that is driven by a driving device (not shown) and rotates in the cylinder 11, and an unvulcanized inside of the cylinder 11. And a hopper 13 for supplying a raw material of rubber. The extruder 10 includes an extrusion head 14 fixed to the tip of the cylinder 11 and a base 20 attached to a rubber discharge port of the extrusion head 14, and the base 20 is a rubber extrusion tip of the extruder 10. Is provided. The extruder 10 heats the supplied raw material in the cylinder 11 and conveys it while kneading it with a rotating screw 12, and unvulcanized rubber in the rubber flow path 15 in the cylinder 11 and the extrusion head 14. It is made to flow and is continuously extruded from the opening (rubber extrusion port) 21 of the base 20 by a predetermined amount.

製造装置１は、押出機１０により、口金２０の開口部２１からゴムを押し出してゴム成形体８０を成形し、ゴム成形体８０を、回転するビードコア７１に向けて供給する。この順次供給されるゴム成形体８０を、配置装置（図示せず）により、又は、人手により、回転装置２まで移動させてビードコア７１に配置し、ゴム成形体８０をビードコア７１に一周配置する。続いて、ビードコア７１が一周したときに、押出機１０の稼動を停止して、ゴム成形体８０の押し出しを停止させる。また、回転装置２によるビードコア７１の回転を停止し、ゴム成形体８０を切断して、ビードコア７１上でゴム成形体８０の両端部を接合する。製造装置１は、このようにして、ビードコア７１の周方向の全体にゴム成形体８０を貼り付けて、ビード部材７０を製造する。このビード部材７０の製造時に、本実施形態では、押出機１０により、ゴム成形体８０に、ビードコア７１を収容可能な凹部（空所）を形成して、ゴム成形体８０の空所にビードコア７１をはめ込む。   The manufacturing apparatus 1 uses the extruder 10 to extrude rubber from the opening 21 of the base 20 to form a rubber molded body 80, and supplies the rubber molded body 80 toward the rotating bead core 71. The sequentially supplied rubber molded body 80 is moved to the rotating device 2 by an arrangement device (not shown) or manually, and is arranged on the bead core 71, and the rubber molded body 80 is arranged around the bead core 71 once. Subsequently, when the bead core 71 makes a round, the operation of the extruder 10 is stopped and the extrusion of the rubber molded body 80 is stopped. Further, the rotation of the bead core 71 by the rotating device 2 is stopped, the rubber molded body 80 is cut, and both end portions of the rubber molded body 80 are joined on the bead core 71. In this way, the manufacturing apparatus 1 manufactures the bead member 70 by attaching the rubber molded body 80 to the entire circumferential direction of the bead core 71. In the present embodiment, when the bead member 70 is manufactured, in the present embodiment, the extruder 10 forms a recess (vacant space) capable of accommodating the bead core 71 in the rubber molded body 80, and the bead core 71 is formed in the space of the rubber molded body 80. Fit.

図２は、押出機１０の口金２０付近を拡大して示す図であり、図２Ａと図２Ｂでは、押出ヘッド１４と口金２０を断面で示している。また、図２Ａは、押出機１０を側方から見た図１に対応する図、図２Ｂは、図２Ａの矢印Ｘ方向（図１の上方）から見た図であり、図２Ｃは、口金２０の開口部２１を図２Ａの矢印Ｙ方向から見た正面図である。   FIG. 2 is an enlarged view showing the vicinity of the base 20 of the extruder 10, and FIGS. 2A and 2B show the extrusion head 14 and the base 20 in cross section. 2A is a view corresponding to FIG. 1 when the extruder 10 is viewed from the side, FIG. 2B is a view when viewed from the direction of the arrow X in FIG. 2A (upper direction in FIG. 1), and FIG. It is the front view which looked at the opening part 20 of 20 from the arrow Y direction of FIG. 2A.

押出機１０は、図示のように、口金２０の開口部２１に空所形成部材３０を備えている。空所形成部材３０は、開口部２１内に配置されて、ゴム成形体８０の一部に空所を形成し、かつ、空所の内面形状を規定する型部材（中子）であり、開口部２１に、ゴムＧの押出方向（流動方向）に沿って取り付けられている。また、空所形成部材３０は、開口部２１のゴムＧが押し出される端面（押出端面２１Ａ）から押出ヘッド１４に向かう所定範囲が、ビードコア７１の断面形状に対応した断面形状（ここでは断面矩形状）に形成される。この空所形成部３０は、ゴム成形体８０のビードコア７１をはめ込む位置に応じて、開口部２１内の所定位置に設けられる。   The extruder 10 includes a void forming member 30 in the opening 21 of the base 20 as illustrated. The void forming member 30 is a mold member (core) that is disposed in the opening 21 to form a void in a part of the rubber molded body 80 and defines the inner surface shape of the void. It is attached to the part 21 along the extrusion direction (flow direction) of the rubber G. The void forming member 30 has a cross-sectional shape corresponding to the cross-sectional shape of the bead core 71 (here, the cross-sectional rectangular shape), the predetermined range from the end surface (extrusion end surface 21A) from which the rubber G of the opening 21 is pushed out toward the extrusion head 14 ). The void forming portion 30 is provided at a predetermined position in the opening 21 in accordance with the position where the bead core 71 of the rubber molded body 80 is fitted.

本実施形態では、空所形成部材３０は、ゴムＧの押出方向の下流側と上流側（図２Ａ、Ｂでは左側と右側）で異なる形状に形成され、下流側にゴム形成部３１が、上流側にゴム誘導部３２が設けられている。ゴム形成部３１は、断面矩形状の直方体や立方体に形成され、開口部２１の押出端面２１Ａから押出ヘッド１４のゴム流路１５内まで、開口部２１の全体を横断して配置される。ゴム誘導部３２は、円錐状や角錐状（ここでは四角錐状）に形成された錐体であり、ゴム形成部３１の端面からゴムＧの押出方向の上流側に向かって突出して形成され、尖った先端部が押出ヘッド１４のゴム流路１５内に配置される。   In the present embodiment, the void forming member 30 is formed in different shapes on the downstream side and the upstream side in the rubber G extrusion direction (left side and right side in FIGS. 2A and 2B), and the rubber forming portion 31 is located on the downstream side. A rubber guiding portion 32 is provided on the side. The rubber forming portion 31 is formed in a rectangular parallelepiped or cube having a rectangular cross section, and is disposed across the entire opening 21 from the extrusion end surface 21A of the opening 21 to the inside of the rubber flow path 15 of the extrusion head 14. The rubber guiding portion 32 is a cone formed in a conical shape or a pyramid shape (here, a quadrangular pyramid shape), and is formed to protrude from the end face of the rubber forming portion 31 toward the upstream side in the rubber G extrusion direction, A sharp tip is disposed in the rubber flow path 15 of the extrusion head 14.

空所形成部材３０は、ゴム誘導部３２により、ゴム流路１５内を流動するゴムＧを周囲に押し退けつつ、開口部２１内のゴム形成部３１の周囲に誘導する。また、空所形成部材３０は、開口部２１内のゴムＧを、ゴム形成部３１と開口部２１の内面との間で流動させ、開口部２１から押し出されるゴムＧに、ゴム形成部３１の断面形状に対応した断面形状の空所を形成する。   The void forming member 30 is guided around the rubber forming portion 31 in the opening 21 while the rubber guiding portion 32 pushes the rubber G flowing in the rubber flow path 15 around. In addition, the void forming member 30 causes the rubber G in the opening 21 to flow between the rubber forming portion 31 and the inner surface of the opening 21, and the rubber G pushed out from the opening 21 has the rubber forming portion 31. A void having a cross-sectional shape corresponding to the cross-sectional shape is formed.

口金２０の開口部２１は、成形すべきゴム成形体８０の断面形状に対応した断面形状に形成され、内面が、ゴム成形体８０の外面を成形する成形面２１Ｂになっている。ここでは、開口部２１は、断面円形状に形成されて、全体形状が円柱状をなし、空所形成部材３０のゴム形成部３１が、底部（図２Ａ、Ｃ参照）に接触して取り付けられている。また、空所形成部材３０は、開口部２１の底部中央（図２Ｂ参照）に取り付けられており、上側と左右両側に開口部２１内のゴムＧが流動する空間を区画して、上面と左右の両面によりゴムＧを成形する。開口部２１は、空所形成部材３０の周りからゴムＧを押し出して、ゴム成形体８０を、円形状の下部中央が矩形状の空所となる断面形状に成形する。また、開口部２１は、空所形成部材３０の左右両側に比べて、上側が厚く断面積が大きい空間になっており、ゴム成形体８０の上部を厚く成形する。更に、この開口部２１は、湾曲面状の成形面２１Ｂを有し、成形面２１Ｂにより、矩形状の空所を除いたゴム成形体８０の外面を、なだらかな湾曲面に成形する。   The opening 21 of the base 20 is formed in a cross-sectional shape corresponding to the cross-sectional shape of the rubber molded body 80 to be molded, and the inner surface is a molding surface 21 </ b> B for molding the outer surface of the rubber molded body 80. Here, the opening 21 is formed in a circular shape in cross section, the overall shape is a columnar shape, and the rubber forming portion 31 of the void forming member 30 is attached in contact with the bottom (see FIGS. 2A and 2C). ing. The void forming member 30 is attached to the center of the bottom of the opening 21 (see FIG. 2B), and divides a space in which the rubber G in the opening 21 flows on the upper side and the left and right sides, and The rubber G is molded from both sides. The opening 21 extrudes the rubber G from around the void forming member 30 to mold the rubber molded body 80 into a cross-sectional shape in which the circular lower center is a rectangular void. Further, the opening 21 is a space that is thicker on the upper side and larger in cross-sectional area than the left and right sides of the void forming member 30, and thickens the upper part of the rubber molded body 80. Further, the opening 21 has a curved molding surface 21B, and the molding surface 21B molds the outer surface of the rubber molded body 80 excluding the rectangular void to a gentle curved surface.

このように、押出機１０は、ゴムＧの押し出し先端部に、口金２０と空所形成部材３０とを備え、未加硫のゴムＧを口金２０の開口部２１から押し出す。その際、上記した開口部２１の成形面２１Ｂと空所形成部材３０との間からゴムＧを押し出して、口金２０により、ゴム成形体８０を、開口部２１の開口形状に対応する断面形状に連続して成形する。同時に、口金２０の開口部２１に設けられた空所形成部材３０により、開口部２１から押し出されるゴム成形体８０の所定位置に、その押出方向に沿って、ビードコア７１がはめ込まれる空所（嵌込部）を形成する。また、空所形成部材３０は、ビードコア７１の外面形状に応じた外面形状を有し、上面と左右の両面でゴムＧを成形して、空所の内面形状をビードコア７１の外面形状に合わせて形成する。   As described above, the extruder 10 includes the base 20 and the void forming member 30 at the leading end of the rubber G, and pushes the unvulcanized rubber G from the opening 21 of the base 20. At that time, the rubber G is extruded from between the molding surface 21B of the opening 21 and the void forming member 30, and the rubber molded body 80 is formed into a cross-sectional shape corresponding to the opening shape of the opening 21 by the die 20. Mold continuously. At the same time, the void forming member 30 provided in the opening 21 of the base 20 is inserted into a predetermined position of the rubber molded body 80 pushed out from the opening 21 along the extrusion direction (a fitting (fit). Forming). The void forming member 30 has an outer surface shape corresponding to the outer surface shape of the bead core 71, and rubber G is molded on both the upper surface and the left and right sides so that the inner surface shape of the void matches the outer surface shape of the bead core 71. Form.

図３は、成形後のゴム成形体８０の断面図であり、図４は、ゴム成形体８０の先端部を示す斜視図である。
ゴム成形体８０は、図示のように、開口部２１の成形面２１Ｂと空所形成部材３０により外面形状が規定されて、長手方向に直交する方向の断面が、断面矩形状の空所８１を有する円形状に形成される。また、ゴム成形体８０は、空所８１が、ビードコア７１の外周に配置される部分である内周側の中央部に形成される。 FIG. 3 is a cross-sectional view of the rubber molded body 80 after molding, and FIG. 4 is a perspective view showing a tip portion of the rubber molded body 80.
As shown in the figure, the rubber molded body 80 has an outer surface shape defined by the molding surface 21B of the opening 21 and the void forming member 30, and a cross section in a direction perpendicular to the longitudinal direction forms a void 81 having a rectangular cross section. It is formed in a circular shape. Further, the rubber molded body 80 is formed in the central portion on the inner peripheral side where the void 81 is a portion disposed on the outer periphery of the bead core 71.

このゴム成形体８０は、口金２０の開口部２１から押し出されたときに、圧力の解放によりゴムＧが膨張して、各部がゴム量に応じた膨張率で膨張する。その際、ゴム成形体８０は、空所８１側（内周側）に比べて外周側の部分（外周部８２）が厚いため、外周部８２が相対的に大きく膨張し、膨張が小さい空所８１側に対して、外周部８２が長手方向にも相対的に大きく膨張する。これにより、ゴム成形体８０は、開口部２１から押し出された後に、空所８１側に曲がるように変形（図４参照）して全体が湾曲する。押出機１０は、このゴムＧの膨張特性を利用して、ゴム成形体８０を膨張により環状のビードコア７１の曲率に合わせて湾曲変形させ、ゴム成形体８０を、ビードコア７１の湾曲する方向に押し出してビードコア７１へ供給する（図１参照）。   When the rubber molded body 80 is pushed out from the opening 21 of the base 20, the rubber G expands by releasing the pressure, and each part expands at an expansion rate corresponding to the amount of rubber. At that time, since the rubber molded body 80 is thicker on the outer peripheral side (outer peripheral part 82) than on the cavity 81 side (inner peripheral side), the outer peripheral part 82 expands relatively relatively, and the expansion is small. The outer peripheral portion 82 expands relatively greatly in the longitudinal direction with respect to the 81 side. Thereby, the rubber molded body 80 is deformed so as to bend toward the void 81 after being pushed out from the opening portion 21 (see FIG. 4), and the whole is curved. The extruder 10 uses the expansion characteristics of the rubber G to cause the rubber molded body 80 to bend and deform in accordance with the curvature of the annular bead core 71 by expansion, and the rubber molded body 80 is extruded in the direction in which the bead core 71 is curved. To bead core 71 (see FIG. 1).

次に、以上説明した製造装置１により、ビード部材７０を製造する手順や動作について説明する。
まず、ビードコア７１を保持部材２Ａに装着して、回転装置２によりビードコア７１を保持する。次に、押出機１０を稼動させて、口金２０の開口部２１からゴムＧを押し出し、開口部２１と空所形成部材３０により、上記のようにゴムＧを押し出して成形する。このゴムＧの押出成形により、ゴム成形体８０に、ビードコア７１がはめ込まれる空所８１を押出方向に形成しつつ、空所８１が形成されたゴム成形体８０を連続して成形する。その際、空所８１の内面形状を、空所形成部材３０により、ビードコア７１の外面形状に合わせて形成して、断面矩形状の空所８１を有するゴム成形体８０をビードコア７１へ供給する。 Next, the procedure and operation | movement which manufactures the bead member 70 with the manufacturing apparatus 1 demonstrated above are demonstrated.
First, the bead core 71 is mounted on the holding member 2 </ b> A, and the bead core 71 is held by the rotating device 2. Next, the extruder 10 is operated, the rubber G is extruded from the opening 21 of the base 20, and the rubber G is extruded and molded by the opening 21 and the void forming member 30 as described above. By the extrusion molding of the rubber G, the rubber molded body 80 in which the voids 81 are formed is continuously molded while forming the voids 81 into which the bead cores 71 are fitted in the rubber molded body 80 in the extrusion direction. At that time, the inner surface shape of the void 81 is formed by the void forming member 30 in accordance with the outer surface shape of the bead core 71, and the rubber molded body 80 having the void 81 having a rectangular cross section is supplied to the bead core 71.

続いて、ゴム成形体８０を回転装置２まで移動させて、ゴム成形体８０の空所８１に、断面矩形状のビードコア７１をはめ込んで、ビードコア７１にゴム成形体８０を配置する。このゴム成形体８０を、ビードコア７１に押し付けてビードコア７１の周囲に貼り付け、環状のビードコア７１の外周側に、ゴム成形体８０を一周配置して、ビードコア７１とゴム成形体８０とを有するビード部材７０を製造する。製造後のビード部材７０は、ゴム成形体８０の空所８１内にビードコア７１が埋め込まれて、円形状に近似した断面形状をなし、内周側のビードコア７１の幅方向両側と外周側にゴム成形体８０が設けられる。   Subsequently, the rubber molded body 80 is moved to the rotating device 2, the bead core 71 having a rectangular cross section is fitted into the space 81 of the rubber molded body 80, and the rubber molded body 80 is disposed on the bead core 71. The rubber molded body 80 is pressed against the bead core 71 and pasted around the bead core 71. The rubber molded body 80 is arranged around the outer periphery of the annular bead core 71, and the bead having the bead core 71 and the rubber molded body 80. The member 70 is manufactured. The manufactured bead member 70 has a bead core 71 embedded in a void 81 of a rubber molded body 80 to form a cross-sectional shape that approximates a circular shape, and rubber on both sides in the width direction and the outer peripheral side of the bead core 71 on the inner peripheral side. A molded body 80 is provided.

また、製造後のビード部材７０は、金型（図示せず）のキャビティ内に収納されて加圧（又は圧縮）成形され、ゴム成形体８０がキャビティの形状に合わせて成形される。これにより、ゴム成形体８０は、例えば、ビードコア７１の外周に配置された所定形状のスティフナに成形される。或いは、ゴム成形体８０は、押出機１０により予め設定形状に成形されて、ビードコア７１に配置され、加圧成形を行うことなく、ビードコア７１の周囲で、スティフナ等のゴム部材を構成する。その後、ビード部材７０は、未加硫タイヤの製造に用いられて、成形中の未加硫タイヤのビード部に、又は、ビード部からサイド部に向かって配置されて、未加硫タイヤの一部となる。   Further, the manufactured bead member 70 is housed in a cavity of a mold (not shown) and pressed (or compressed), and a rubber molded body 80 is molded in accordance with the shape of the cavity. Thereby, the rubber molded body 80 is molded into a stiffener having a predetermined shape disposed on the outer periphery of the bead core 71, for example. Alternatively, the rubber molded body 80 is molded into a preset shape by the extruder 10 and disposed on the bead core 71, and constitutes a rubber member such as a stiffener around the bead core 71 without performing pressure molding. Thereafter, the bead member 70 is used for manufacturing an unvulcanized tire, and is disposed on the bead portion of the unvulcanized tire during molding or from the bead portion toward the side portion. Part.

以上説明したように、この製造装置１では、開口部２１に設けた空所形成部材３０により、ゴム成形体８０に、ビードコア７１がはめ込まれる空所８１を形成する。この空所８１にビードコア７１をはめ込むことで、複雑な作業や工程を行うことなく、ビードコア７１にゴム成形体８０を簡単に配置でき、ビード部材７０の製造に要する手間や時間を削減することができる。併せて、ゴム成形体８０の配置位置の変動を抑制して、ゴム成形体８０をビードコア７１に精度よく確実に配置することもできる。また、ゴム成形体８０の成形と配置を一度行うだけでビード部材７０が完成するため、ビード部材７０を短時間で容易に製造できる。   As described above, in the manufacturing apparatus 1, the void 81 in which the bead core 71 is fitted is formed in the rubber molded body 80 by the void forming member 30 provided in the opening 21. By fitting the bead core 71 in the void 81, the rubber molded body 80 can be easily arranged in the bead core 71 without performing complicated operations and processes, and the labor and time required for manufacturing the bead member 70 can be reduced. it can. In addition, it is also possible to accurately and reliably arrange the rubber molded body 80 on the bead core 71 by suppressing fluctuations in the arrangement position of the rubber molded body 80. Moreover, since the bead member 70 is completed only by forming and arranging the rubber molded body 80 once, the bead member 70 can be easily manufactured in a short time.

加えて、ゴム成形体８０を、上記したリボン状ゴムの積層に伴う制限を受けずに、口金２０の開口部２１や空所形成部材３０の形状に応じて種々の断面形状に成形できる。また、上記のように金型内で加圧成形することで、ゴム成形体８０を任意の形状に成形できるため、ビード部材７０の形状の自由度を高めることができる。更に、押出機１０によりゴムＧを押し出してゴム成形体８０を成形するため、ゴム成形体８０内にエア入り等の欠陥が生じ難くなり、ゴム成形体８０を、安定した品質で、かつ、一定の断面形状を維持して成形できる。   In addition, the rubber molded body 80 can be molded into various cross-sectional shapes according to the shapes of the opening 21 of the base 20 and the void forming member 30 without being restricted by the above-described ribbon-shaped rubber lamination. Further, since the rubber molded body 80 can be molded into an arbitrary shape by pressure molding in the mold as described above, the degree of freedom of the shape of the bead member 70 can be increased. Further, since the rubber molded body 80 is molded by extruding the rubber G by the extruder 10, defects such as air entering are less likely to occur in the rubber molded body 80, and the rubber molded body 80 is stable in quality and constant. It can shape | mold while maintaining the cross-sectional shape.

従って、本実施形態の製造装置１や製造方法によれば、ビード部材７０に欠陥が発生するのを抑制できるとともに、ビードコア７１にゴム成形体８０を簡単に配置でき、ビード部材７０の製造にかかる時間を短縮して生産性を向上させることができる。また、空所形成部材３０により、空所８１の内面形状をビードコア７１の外面形状に合わせて形成することで、空所８１内にビードコア７１を円滑にはめ込むことができる。その結果、ゴム成形体８０を、一層簡単かつ正確にビードコア７１に配置できる。   Therefore, according to the manufacturing apparatus 1 and the manufacturing method of the present embodiment, it is possible to suppress the occurrence of defects in the bead member 70, and it is possible to easily arrange the rubber molded body 80 on the bead core 71, and to manufacture the bead member 70. Time can be shortened and productivity can be improved. Further, by forming the inner surface shape of the void 81 in accordance with the outer surface shape of the bead core 71 by the void forming member 30, the bead core 71 can be smoothly fitted into the void 81. As a result, the rubber molded body 80 can be disposed on the bead core 71 more easily and accurately.

ここで、この製造装置１では、押出機１０により成形したゴム成形体８０をビードコア７１へ直接供給して、温度が高いゴム成形体８０をビードコア７１に配置する。これに対し、ゴム成形体８０は、ビードコア７１へ直接供給せず、巻取機に一旦巻き取って冷却した後に、ビードコア７１へ供給するようにしてもよい。   Here, in the manufacturing apparatus 1, the rubber molded body 80 molded by the extruder 10 is directly supplied to the bead core 71, and the rubber molded body 80 having a high temperature is disposed on the bead core 71. On the other hand, the rubber molded body 80 may not be supplied directly to the bead core 71 but may be supplied to the bead core 71 after being wound around a winder and cooled.

図５は、ゴム成形体８０の巻取機を示す斜視図である。
巻取機３は、図示のように、円筒状をなし、駆動装置（図示せず）により駆動されて軸線回りに回転する。押出機１０により成形されたゴム成形体８０は、巻取方向（図５の矢印Ｍ）に回転する巻取機３に、順に隙間を開けて巻き取られて、巻取機３の外周に螺旋状に巻き付けられる。ゴム成形体８０は、巻取機３に巻き取られて冷却され、巻取機３とともに保管される。ビード部材７０の製造時には、ゴム成形体８０は、巻取機３を逆回転させて巻取機３から引き出され、ビードコア７１に一周配置される。また、ゴム成形体８０は、後端部が切断されて、巻取機３側のゴム成形体８０から切り離され、ビードコア７１上で先後端部が接合されて環状に形成される。 FIG. 5 is a perspective view showing a winder of the rubber molded body 80.
As shown in the figure, the winder 3 has a cylindrical shape and is driven by a driving device (not shown) to rotate around an axis. The rubber molded body 80 molded by the extruder 10 is wound around the winding machine 3 that rotates in the winding direction (arrow M in FIG. 5) with a gap in order, and spirals around the winding machine 3. It is wound into a shape. The rubber molded body 80 is wound around the winder 3, cooled, and stored together with the winder 3. At the time of manufacturing the bead member 70, the rubber molded body 80 is pulled out from the winder 3 by rotating the winder 3 in the reverse direction, and is arranged around the bead core 71. In addition, the rubber molded body 80 is cut into a rear end portion and separated from the rubber molded body 80 on the winder 3 side, and the front and rear end portions are joined on the bead core 71 to form an annular shape.

このように、ゴム成形体８０を一旦冷却することで、その取り扱いが容易になるため、ゴム成形体８０をビードコア７１へ配置するときの作業性を向上できる。また、ビード部材７０を製造する毎に、押出機１０の稼動と停止を繰り返し行う必要もないため、製造装置１の動作パターンやビード部材７０の製造工程を、より単純にできる。   As described above, once the rubber molded body 80 is cooled, the handling becomes easy. Therefore, workability when the rubber molded body 80 is disposed on the bead core 71 can be improved. In addition, since it is not necessary to repeatedly operate and stop the extruder 10 every time the bead member 70 is manufactured, the operation pattern of the manufacturing apparatus 1 and the manufacturing process of the bead member 70 can be simplified.

なお、ゴム成形体８０は、製造するビード部材７０の種類や形状に応じて、上記と異なる断面形状（楕円形状、三角形状、矩形状等）に形成してもよい。一方、ゴム成形体８０の空所８１も、ビードコア７１の断面形状に合わせて、矩形状以外の断面形状に形成してもよい。この場合には、空所形成部材３０のゴム形成部３１が、矩形状以外の断面形状に形成される。また、空所形成部材３０は、ゴム誘導部３２を、角柱状や楔状等、上記と異なる形状に形成してもよい。更に、空所形成部材３０は、口金２０の開口部２１内で、各ビード部材７０におけるビードコア７１の位置に対応させて配置すればよく、開口部２１の内面から離して配置してもよい。   The rubber molded body 80 may be formed in a cross-sectional shape (an elliptical shape, a triangular shape, a rectangular shape, etc.) different from the above depending on the type and shape of the bead member 70 to be manufactured. On the other hand, the void 81 of the rubber molded body 80 may be formed in a cross-sectional shape other than the rectangular shape in accordance with the cross-sectional shape of the bead core 71. In this case, the rubber forming portion 31 of the void forming member 30 is formed in a cross-sectional shape other than a rectangular shape. Further, the void forming member 30 may form the rubber guiding portion 32 in a shape different from the above, such as a prismatic shape or a wedge shape. Furthermore, the void forming member 30 may be disposed in the opening 21 of the base 20 so as to correspond to the position of the bead core 71 in each bead member 70, or may be disposed away from the inner surface of the opening 21.

図６は、空所形成部材の他の形状例を示す図であり、図６Ａ、Ｂ、Ｃを、それぞれ図２Ａ、Ｂ、Ｃに対応させて示している。
この空所形成部材４０は、図示のように、ゴム形成部４１とゴム誘導部４２とを有し、ゴム形成部４１が断面矩形状に形成されて、口金２０の開口部２１内に配置されている。これに対し、ゴム誘導部４２は、三角形状の上面が傾斜して形成された楔状をなし、ゴム形成部４１の端面からゴム流路１５内に突出して配置されている。この空所形成部材４０は、上記した空所形成部材３０と同様に、ゴム誘導部４２によりゴムを誘導して、ゴム形成部４１により、開口部２１から押し出されるゴムＧに空所８１を形成する。 FIG. 6 is a view showing another example of the shape of the void forming member, and FIGS. 6A, 6B, and 6C are shown corresponding to FIGS. 2A, 2B, and 2C, respectively.
As shown in the figure, the void forming member 40 includes a rubber forming portion 41 and a rubber guiding portion 42. The rubber forming portion 41 is formed in a rectangular cross section and is disposed in the opening 21 of the base 20. ing. On the other hand, the rubber guiding portion 42 has a wedge shape in which a triangular upper surface is inclined and is disposed so as to protrude from the end surface of the rubber forming portion 41 into the rubber flow path 15. In the void forming member 40, the rubber is guided by the rubber guiding portion 42, and the void 81 is formed in the rubber G pushed out from the opening 21 by the rubber forming portion 41, similarly to the void forming member 30 described above. To do.

図７は、空所形成部材の他の配置位置の例を示す図であり、開口部２１の内面（成形面２１Ｂ）から離して配置した空所形成部材を示している。また、図７Ａは、図２Ａに対応する口金２０の側断面図であり、図７Ｂは、図７Ａの矢印Ｚ方向から見た正面図である。
この空所形成部材５０は、図示のように、ゴム形成部５１と、ゴム誘導部５２と、取付部材５３とを有する。ゴム形成部５１とゴム誘導部５２は、上記した空所形成部材３０のゴム形成部３１とゴム誘導部３２と同様に構成されている。取付部材５３は、角棒状に形成され、ゴム形成部５１の幅方向の一端部（図７Ｂ参照）と開口部２１の内面との間に配置されて、ゴム形成部５１と開口部２１の内面に固定される。これにより、取付部材５３は、空所形成部材５０を、開口部２１の底部から所定間隔だけ離して口金２０に取り付ける。また、取付部材５３（図７Ａ参照）は、ゴム形成部５１の下側から、開口部２１の押出端面２１Ａの外側まで突出して配置され、ゴム形成部５１の下側の開口部２１を左右に分断する。 FIG. 7 is a diagram showing an example of another arrangement position of the void forming member, and shows the void forming member arranged away from the inner surface (molding surface 21B) of the opening 21. FIG. 7A is a side sectional view of the base 20 corresponding to FIG. 2A, and FIG. 7B is a front view seen from the direction of arrow Z in FIG. 7A.
The void forming member 50 includes a rubber forming portion 51, a rubber guiding portion 52, and an attachment member 53 as shown in the drawing. The rubber forming part 51 and the rubber guiding part 52 are configured similarly to the rubber forming part 31 and the rubber guiding part 32 of the void forming member 30 described above. The attachment member 53 is formed in the shape of a square bar, and is disposed between one end portion in the width direction of the rubber forming portion 51 (see FIG. 7B) and the inner surface of the opening portion 21, and the rubber forming portion 51 and the inner surface of the opening portion 21. Fixed to. As a result, the attachment member 53 attaches the void forming member 50 to the base 20 at a predetermined distance from the bottom of the opening 21. Further, the attachment member 53 (see FIG. 7A) is disposed so as to protrude from the lower side of the rubber forming portion 51 to the outside of the extrusion end surface 21A of the opening portion 21, and the lower opening portion 21 of the rubber forming portion 51 is set to the left and right. Divide.

口金２０は、この空所形成部材５０の下面と開口部２１の内面との間に、肉薄なゴムＧを押し出す隙間（蓋押出部２１Ｃ）が形成される。蓋押出部２１Ｃは、口金２０と空所形成部材５０との間に設けられて開口部２１の一部を構成し、ゴム成形体８０の一部に、空所８１を塞ぐ蓋状ゴム（蓋部材）を形成する。また、蓋押出部２１Ｃは、空所形成部材５０の下面に沿って一方の縁部から他方の縁部まで形成され、一方（図７Ｂでは左方）の縁部で、取付部材５３により開口部２１の他の部分から分断され、他方（図７Ｂでは右方）の縁部で、開口部２１の他の部分と連通する。押出機１０は、口金２０の開口部２１からゴムＧを押し出して、空所形成部材５０により空所８１が形成されたゴム成形体８０を成形する。同時に、開口部２１の蓋押出部２１ＣからゴムＧを押し出して、ゴム成形体８０の一部に、空所８１を塞ぐ蓋状ゴムを形成する。   In the base 20, a gap (lid extrusion part 21 </ b> C) for pushing out the thin rubber G is formed between the lower surface of the void forming member 50 and the inner surface of the opening 21. The lid extruding portion 21 </ b> C is provided between the base 20 and the void forming member 50 and constitutes a part of the opening 21, and a lid-like rubber (lid lid) covering the void 81 with a part of the rubber molded body 80. Member). The lid extruding portion 21C is formed from one edge portion to the other edge portion along the lower surface of the void forming member 50, and is opened by the attachment member 53 at one edge portion (left side in FIG. 7B). It is divided from the other part of 21 and communicates with the other part of the opening 21 at the other edge (right side in FIG. 7B). The extruder 10 extrudes the rubber G from the opening 21 of the base 20 and molds the rubber molded body 80 in which the void 81 is formed by the void forming member 50. At the same time, the rubber G is extruded from the lid extruding portion 21 </ b> C of the opening 21 to form a lid-like rubber that closes the void 81 in a part of the rubber molded body 80.

図８は、蓋状ゴムを有するゴム成形体８０の断面図である。
ここでは、ゴム成形体８０は、図示のように、その本体部と一体に、ゴム片からなる蓋状ゴム８３が形成されて、内周側に蓋状ゴム８３が設けられ、蓋状ゴム８３により、空所８１のビードコア７１がはめ込まれる面が塞がれる。ビード部材７０の製造時には、蓋状ゴム８３を、取付部材５３により形成された切断部８４で開いて（図８の矢印Ｐ）、ゴム成形体８０の空所８１を開放し、空所８１にビードコア７１をはめ込む。続いて、蓋状ゴム８３を閉じてビードコア７１を収容する空所８１を塞ぎ、蓋状ゴム８３をビードコア７１の内周に押し付けて、蓋状ゴム８３をビードコア７１に貼り付ける。 FIG. 8 is a cross-sectional view of a rubber molded body 80 having a lid-like rubber.
Here, as shown in the figure, the rubber molded body 80 is integrally formed with a main body portion, and a lid-like rubber 83 made of a rubber piece is formed, and a lid-like rubber 83 is provided on the inner peripheral side. As a result, the surface into which the bead core 71 of the void 81 is fitted is closed. At the time of manufacturing the bead member 70, the lid rubber 83 is opened by the cutting portion 84 formed by the mounting member 53 (arrow P in FIG. 8), and the void 81 of the rubber molded body 80 is opened. Insert the bead core 71. Subsequently, the lid-like rubber 83 is closed to close the space 81 for accommodating the bead core 71, the lid-like rubber 83 is pressed against the inner periphery of the bead core 71, and the lid-like rubber 83 is attached to the bead core 71.

以上のように、ゴム成形体８０に蓋状ゴム８３を形成するときには、ビードコア７１の全周にゴム成形体８０を配置することができる。そのため、ビードコア７１をゴムで包み込んだ構造のビード部材７０を製造できる。また、ゴム成形体８０をビードコア７１に確実に組み付けることもでき、ゴム成形体８０の配置精度を向上させることができる。なお、ここでは、取付部材５３により切断部８４を形成したため、蓋状ゴム８３を容易に開いて空所８１を円滑に開放できる。このように、蓋状ゴム８３は、ゴム成形体８０を成形する際に、口金２０の開口部２１に設けた切離部材により、ゴム成形体８０の本体部から一部を予め切り離して形成してもよい。また、蓋状ゴム８３は、ゴム成形体８０の本体部と切り離さずに形成した後、ゴム成形体８０をビードコア７１に配置するときに切断手段で切断して、空所８１を開放するようにしてもよい。   As described above, when the lid rubber 83 is formed on the rubber molded body 80, the rubber molded body 80 can be disposed on the entire circumference of the bead core 71. Therefore, the bead member 70 having a structure in which the bead core 71 is wrapped with rubber can be manufactured. Also, the rubber molded body 80 can be reliably assembled to the bead core 71, and the placement accuracy of the rubber molded body 80 can be improved. Here, since the cutting portion 84 is formed by the mounting member 53, the lid rubber 83 can be easily opened to open the void 81 smoothly. Thus, when the rubber molded body 80 is molded, the lid rubber 83 is formed by separating a part from the main body of the rubber molded body 80 in advance by the separating member provided in the opening 21 of the base 20. May be. Further, the lid rubber 83 is formed without being separated from the main body portion of the rubber molded body 80, and then is cut by a cutting means when the rubber molded body 80 is disposed on the bead core 71 so as to open the void 81. May be.

１・・・ビード部材の製造装置、２・・・回転装置、３・・・巻取機、１０・・・押出機、１１・・・シリンダ、１２・・・スクリュ、１３・・・ホッパー、１４・・・押出ヘッド、１５・・・ゴム流路、２０・・・口金、２１・・・開口部、２１Ａ・・・押出端面、２１Ｂ・・・成形面、２１Ｃ・・・蓋押出部、３０・・・空所形成部材、３１・・・ゴム形成部、３２・・・ゴム誘導部、４０・・・空所形成部材、４１・・・ゴム形成部、４２・・・ゴム誘導部、５０・・・空所形成部材、５１・・・ゴム形成部、５２・・・ゴム誘導部、５３・・・取付部材、７０・・・ビード部材、７１・・・ビードコア、８０・・・ゴム成形体、８１・・・空所、８２・・・外周部、８３・・・蓋状ゴム、８４・・・切断部、Ｇ・・・ゴム。   DESCRIPTION OF SYMBOLS 1 ... Manufacturing apparatus of a bead member, 2 ... Rotating device, 3 ... Winding machine, 10 ... Extruder, 11 ... Cylinder, 12 ... Screw, 13 ... Hopper, 14 ... extrusion head, 15 ... rubber flow path, 20 ... mouthpiece, 21 ... opening, 21A ... extrusion end face, 21B ... molding surface, 21C ... lid extrusion part, 30 ... void forming member, 31 ... rubber forming part, 32 ... rubber guiding part, 40 ... void forming member, 41 ... rubber forming part, 42 ... rubber guiding part, 50 ... void forming member, 51 ... rubber forming part, 52 ... rubber guiding part, 53 ... mounting member, 70 ... bead member, 71 ... bead core, 80 ... rubber Molded body, 81 ... void, 82 ... outer periphery, 83 ... lid rubber, 84 ... cutting part, G ... rubber.

Claims (7)

環状のビードコアに、押出機で成形したゴム成形体を配置して、ビードコアとゴム成形体とを有するビード部材を製造するビード部材の製造装置であって、
押出機が、ゴムを開口部から押し出してゴム成形体を成形する口金と、口金の開口部に設けられて、ゴム成形体にビードコアがはめ込まれる空所を形成する空所形成部材と、を備えていることを特徴とするビード部材の製造装置。 A bead member manufacturing apparatus for manufacturing a bead member having a bead core and a rubber molded body by arranging a rubber molded body molded by an extruder on an annular bead core,
An extruder includes a die that extrudes rubber from an opening to form a rubber molded body, and a void forming member that is provided in the opening of the die and forms a void in which a bead core is fitted into the rubber molded body. An apparatus for producing a bead member. 請求項１に記載されたビード部材の製造装置において、
空所形成部材が、ビードコアの外面形状に応じた外面形状を有し、空所の内面形状をビードコアの外面形状に合わせて形成することを特徴とするビード部材の製造装置。 In the bead member manufacturing apparatus according to claim 1,
An apparatus for manufacturing a bead member, wherein the void forming member has an outer surface shape corresponding to the outer surface shape of the bead core, and the inner surface shape of the void is formed in accordance with the outer surface shape of the bead core. 請求項１又は２に記載されたビード部材の製造装置において、
口金の開口部が、ゴム成形体の外面を成形する湾曲面状の成形面を有することを特徴とするビード部材の製造装置。 In the bead member manufacturing apparatus according to claim 1 or 2,
The bead member manufacturing apparatus, wherein the opening of the base has a curved molding surface for molding the outer surface of the rubber molded body. 請求項１ないし３のいずれかに記載されたビード部材の製造装置において、
口金が、空所形成部材との間に設けられて開口部の一部を構成し、ゴム成形体の一部に空所を塞ぐ蓋状ゴムを形成する蓋押出部を有することを特徴とするビード部材の製造装置。 In the bead member manufacturing apparatus according to any one of claims 1 to 3,
The base is provided between the void forming member and constitutes a part of the opening, and has a lid extruding portion that forms a lid-like rubber that closes the void in a part of the rubber molded body. Bead member manufacturing equipment. 環状のビードコアにゴム成形体を配置して、ビードコアとゴム成形体とを有するビード部材を製造するビード部材の製造方法であって、
ゴムの押出成形により、ビードコアがはめ込まれる空所が形成されたゴム成形体を成形する工程と、
ゴム成形体の空所にビードコアをはめ込んで、ビードコアにゴム成形体を配置する工程と、
を有することを特徴とするビード部材の製造方法。 A method for producing a bead member, in which a rubber molded body is disposed on an annular bead core, and a bead member having a bead core and a rubber molded body is manufactured.
A step of molding a rubber molded body in which a void into which a bead core is fitted is formed by extrusion of rubber;
Inserting the bead core into the space of the rubber molded body and placing the rubber molded body on the bead core; and
The manufacturing method of the bead member characterized by having. 請求項５に記載されたビード部材の製造方法において、
ゴム成形体を成形する工程が、空所の内面形状をビードコアの外面形状に合わせて形成する工程を有することを特徴とするビード部材の製造方法。 In the manufacturing method of the bead member according to claim 5,
A method for producing a bead member, wherein the step of molding a rubber molded body includes a step of forming an inner surface shape of a void according to an outer surface shape of a bead core. 請求項５又は６に記載されたビード部材の製造方法において、
ゴム成形体を成形する工程が、ゴム成形体の一部に空所を塞ぐ蓋状ゴムを形成する工程を有し、
ゴム成形体を配置する工程が、蓋状ゴムを開いてゴム成形体の空所にビードコアをはめ込む工程と、蓋状ゴムを閉じてビードコアを収容する空所を塞ぐ工程と、を有することを特徴とするビード部材の製造方法。 In the manufacturing method of the bead member according to claim 5 or 6,
The step of molding the rubber molded body has a step of forming a lid-like rubber that closes a void in a part of the rubber molded body,
The step of arranging the rubber molded body includes a step of opening the lid rubber and fitting the bead core into a space of the rubber molded body, and a step of closing the lid rubber and closing the space for accommodating the bead core. A method for manufacturing a bead member.
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PCT/JP2011/057661 WO2011152107A1 (en) 2010-06-01 2011-03-28 Production device and production method for bead member

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JP6065255B2 (en) * 2012-01-27 2017-01-25 株式会社ブリヂストン Manufacturing method, manufacturing apparatus, and tire bead member for tire
JP5580849B2 (en) * 2012-05-16 2014-08-27 住友ゴム工業株式会社 Bead apex rubber forming method and bead apex rubber forming apparatus used therefor

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