JP2004230740A

JP2004230740A - Anti-slip working method of edge face of metal fitting of rubber member with metal fitting and vulcanizing mold used therein

Info

Publication number: JP2004230740A
Application number: JP2003022836A
Authority: JP
Inventors: Yoshiharu Matsumoto; 義春松本; Yoshikazu Tsujimoto; 芳和辻本
Original assignee: Toyo Tire and Rubber Co Ltd
Current assignee: Toyo Tire Corp
Priority date: 2003-01-30
Filing date: 2003-01-30
Publication date: 2004-08-19
Anticipated expiration: 2023-01-30
Also published as: JP4040985B2

Abstract

<P>PROBLEM TO BE SOLVED: To reduce the amount in stock and consequently heighten productivity and lower cost by a method wherein a process of anti-slip work is made unnecessary by simultaneously performing the anti-slip work of the edge face of a metal fitting of a rubber member with the metal fitting therein with a vulcanizing molding process. <P>SOLUTION: In the vulcanizing molding rubber part under the condition that a metal tubular fitting 1 is set within a vulcanizing mold 10 in the manufacturing of the rubber member with the metal fitting therein, anti-slip working blade parts 30 and 30 are provided a stepped surface parts 25 and 26 forming abutting portions against the edge faces of the metal tubular fitting in the vulcanizing mold 10 so as to apply serrating work onto the edge faces with the blade parts by axially pressing the edge faces of the metal tubular fitting 1 set in the mold with the blade parts 30 abutting against the edge faces through the closing of the vulcanizing mold 10. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

【０００１】
【発明の属する技術分野】
本発明は、自動車のサスペンション等に使用される防振ブッシュその他の金具付ゴム部材の金具端面の滑り止め加工方法、及びこれに用いる加硫金型に関するものである。
【０００２】
【従来の技術】
例えば、自動車等の車両のサスペンションにおいて、車体側の部材とサスペンション等のメンバー部材との間に介装されて使用される防振ブッシュ等の防振装置として、例えば、図５および図６に示すように、車体側の部材に取り付けられる取付部材としての筒状金具１と、この筒状金具１の外周に加硫接着した防振基体としてのゴム部２とを有してなる金具付ゴム部材Ａが知られている。また、前記ゴム部２の外周に外筒金具を加硫接着したタイプの金具付ゴム部材も知られている（図示せず）。
【０００３】
この金具付ゴム部材Ａの使用状態においては、図７に示すように、前記筒状金具１に取付ボルト５０が貫挿されて、車体側の板状部材５１，５１に、前記筒状金具１の両端面が当接した状態で取付け固定される。またゴム部２、あるいはその外周に加硫接着された外筒金具がカラー５２に圧入され、サスペンション等のメンバー部材５３に固定される。
【０００４】
ところで、前記のような車両への組付け状態において、前記筒状金具１の端面が当接する車体側の部材５１，５１への取付け固定を安定化する目的で、前記筒状金具１の両端面には、図５および図６に示すように、セレーション３等の凹凸による滑り止め加工を施すこと行われている（下記の特許文献１参照）。
【０００５】
【特許文献１】
特開平１１−２２７７０号公報（図７−図９）
【０００６】
【発明が解決しようとする課題】
従来、前記の金具付ゴム部材Ａの金具端面に、例えばセレーション３等の滑り止め加工を施す方法としては、長尺のパイプ材を、防振ブッシュ等の金具付ゴム部材Ａでの筒状金具１としての使用に応じた長さに切断した後、各筒状金具１毎に各々加工機にセットし、筒状金具端面に加工用の刃具を押しつけて、セレーション等の凹凸を付ける加工を行っていた。
【０００７】
この場合、金具付ゴム部材の製造において、切断した各筒状金具毎にセレーション等の加工を施すための独立した工程を必要とし、製造上の工程増につながるばかりか、筒状金具のストック量が多大になる等の無駄を生じ、生産性が低く、また、これに伴って前記の滑り止め加工を施した金具付ゴム部材がコスト高なものとなっていた。
【０００８】
本発明は、上記に鑑みてなしたものであり、筒状金具の端面にセレーション等の滑り止め加工を施した金具付ゴム部材の製造において、前記筒状金具端面の滑り止め加工を、ゴム部の加硫成形の工程で同時に行うことにより、滑り止め加工のための工程を不要にして、かつ筒状金具のストック量を減少でき、生産性を高め、コスト低下に寄与できる金具端面の滑り止め加工方法を提供するものであり、さらにはその加工方法の実施に好適に使用できる加硫金型を提供するものである。
【０００９】
【課題を解決するための手段】
上記の課題を解決する本発明の１つは、取付部材としての筒状金具と、その外周に加硫接着されたゴム部とを有してなる金具付ゴム部材において、前記筒状金具の端面に滑り止め加工を施す方法であって、加硫金型内に前記筒状金具をセットして前記ゴム部を加硫成形する工程において、加硫金型内における筒状金具端面との当接部分に滑り止め加工用の刃部を設けておき、この加硫金型の型閉めにより、金型内にセットされた前記筒状金具の端面をこれに当接する前記刃部で軸方向に押圧して、該端面に刃部により凹凸を付ける加工を施すことを特徴とする。
【００１０】
この発明によれば、ゴム部の加硫成形工程において、所定長さに切断された筒状金具を加硫金型内にセットした状態での型閉めの際、前記加硫金型内の前記筒状金具端面との当接部分に設けられた滑り止め加工用の刃部により、前記筒状金具の端面を押圧し、型閉めのためのプレス圧を利用して、該筒状金具端面に前記刃部による凹凸を付ける。こうして完全に型閉めした状態でゴム材料を射出して加硫成形する。これにより、加硫成形の工程において、同時に筒状金具の端面に前記刃部の形状に対応した凹凸による滑り止め加工を施すことができる。
【００１１】
前記加工方法において、加硫金型内における筒状金具両端面との当接部分に、それぞれ滑り止め加工用の刃部を設けておくことにより、この加硫金型の型閉めによって、筒状金具の両端面に前記刃部のくい込みによる凹凸を付ける加工を施すことができる。
【００１２】
なお、前記の滑り止め加工は、筒状金具端面の周方向に山部と谷部が交互に連続するセレーションを形成する加工であるのが好ましく、これにより、加硫成形工程での型閉めのためのプレス圧を利用して、前記筒状金具端面に対しセレーションによる滑り止め加工を問題なく格別の手数をかけずに容易に施すことができる。
【００１３】
また、本発明の他の１つは、取付部材としての筒状金具と、その外周に加硫接着されたゴム部とを有してなる金具付ゴム部材において、前記筒状金具の端面に滑り止め加工を施す方法に用いる加硫金型であって、上下に相対向して型閉め可能な上型と下型とを備え、上下両型にそれぞれ前記筒状金具の両端部を支持する支持体を有し、両支持体の少なくとも一方の前記筒状金具端面との当接部分に、型閉め状態において前記筒状金具端面に対してくい込み状態になる滑り止め加工用の刃部が設けられてなることを特徴とする。この加硫金型を用いることにより、上記の滑り止め加工方法を好適に実施できる。
【００１４】
前記の加硫金型において、前記の上下の支持体は、型閉め状態において筒状金具の両端部に嵌入する支持ピン部の基部外周に前記筒状金具端面に当接する環状の段面部を有し、該段面部に滑り止め加工用の刃部が形成されてなるものとすることができる。これにより、前記加硫金型にセットされる筒状金具の両端部に支持体の支持ピン部を嵌入することにより、該筒状金具を所定のセット位置に安定性よく保持でき、しかも型閉めの際には、前記支持ピン部の基部外周に有する環状の段面部に形成された滑り止め加工用の刃部を、前記筒状金具の端面に対して歪みなく正確に当接させることができ、刃部によるセレーション等の滑り止め加工を確実に行うことができる。
【００１５】
【発明の実施の形態】
次に本発明の実施の形態を図面に示す実施例に基づいて説明する。
【００１６】
図１は本発明の実施に使用する加硫金型の概略を示す加硫成形時の断面図、図２は同上の加硫金型の型閉め前の要部の断面図、図３は同上の加硫金型の型閉め状態の要部の断面図、図４は加硫金型内の上下の支持体の一方の概略を示す斜視図である。図５および図６は本発明の加工対象製品である金具付ゴム部材Ａの１例を示している。
【００１７】
図５及び図６に示す金具付ゴム部材Ａは、車体フレーム等の相手側部材に対する取付部材としての筒状金具１と、その外周に加硫接着した防振基体としてのゴム部２とを有してなり、前記筒状金具１の両端面に滑り止めのためのセレーション３を形成したものを示している。３ａおよび３ｂはそれぞれ前記セレーション３の山部と谷部を示している。このセレーション３の山部３ａと谷部３ｂの高低差は、通常０．３〜０．７ｍｍ程度である。なお、前記筒状金具１は、例えば「機械構造用炭素鋼鋼管」ＳＴＫＭ１５Ｃ等よりなる長尺の金属製パイプを所定の長さに切断したものからなる。
【００１８】
先ず、前記金具付ゴム部材Ａの筒状金具１の端面に滑り止め加工を施す本発明の方法において使用する加硫金型１０について説明する。
【００１９】
図１〜図３に示すように、この加硫金型１０は、上下に相対向して中型１３を挟んで型閉め可能な上型１１、下型１２とを備えてなり、所定のプレス装置（図示せず）による型閉め状態において、前記上型１１と下型１２と中型１３とにより、該加硫金型１０内にセットされる筒状金具１の外方に成形用のキャビティ１４を形成するようになっている。このようなキャビティ構成部分１５は、通常、図１のように、１台の金型に複数が並設される。
【００２０】
図１の１６はランナープレートであり、射出機（図示せず）から１つの射出口１７に射出されるゴム材料を、ランナー溝１８ａ及び注入孔１８ｂを経て前記キャビティ１４に注入できるように設けられている。１９はベースプレートである。
【００２１】
前記上型１１及び下型１２は、それぞれ前記キャビティ構成部１５において上下に相対向して、前記金具付ゴム部材Ａのゴム部２の軸方向端面を成形する成形面部２１、２２を有している。図の場合、前記成形面部２１、２２は、上型１１および下型１２の凹所に嵌合され固定された入れ子型２７、２８により形成されている。
【００２２】
そして、前記各成形面部２１、２２の中央（軸心部）に、下向きまたは上向きに突出する支持ピン部２３ａ、２４ａを有する支持体２３、２４が設けられている。前記上下の両支持体２３、２４は、それぞれ図のように、前記キャビティ１４にセットされる筒状金具１を、その上下両端部に前記支持ピン部２３ａ、２４ａを嵌入して所定位置に支持できるようになっている。
【００２３】
前記両支持体２３、２４には、それぞれ前記支持ピン部２３ａ、２４ａの基部外周に、前記筒状金具１の端面に対する当接部分となる環状の段面部２５、２６が設けられ、該段面部２５、２６に、それぞれ型閉め状態において前記筒状金具１の端面に対してくい込み状態になる滑り止め加工用の刃部３０、３０が設けられている。
【００２４】
図の場合、前記の刃部３０として、図４に示すように、図５及び図６の金具付ゴム部材Ａの金具端面のセレーション３に対応する凹凸形状、すなわちセレーション３の山部３ａ及び谷部３ｂに対応する形状の凹部３０ａおよび凸部３０ｂとが周方向に交互に連続して形成されている。型閉め状態における前記筒状金具端面に対する前記刃部３０のくい込み量は、前記セレーション３の山部３ａと谷部３ｂの高低差に応じて設定される。
【００２５】
前記の刃部３０は、通常、支持体２３、２４とは別の材料、例えば高速度工具鋼ＳＫＨ５７等の焼き入れした材料よりなるものを、前記段面部２５、２６に一体に付設するが、このほか、該刃部３０を前記支持体２３、２４と一体に形成しておくことも可能である。この場合、支持体２３、２４の全体を前記同様の焼き入れした材料により形成するのが望ましい。
【００２６】
前記中型１３は、中央部に開口３１を有し、前記上下両型１１、１２間で前記キャビティ１４の外周を画し、前記金具付ゴム部材Ａのゴム部２の外周を成形できるように設けられている。外筒金具を有する金具付ゴム部材の加硫成形の場合には、キャビティ１４の外周部にセットされる外筒金具の外周を囲むように設けられる。
【００２７】
なお、前記加硫金型１０の加硫成形のために必要な他の構成については、従来と同様の構造を利用できるので、その説明は省略する。
【００２８】
前記構成を含む加硫金型１０を備える加硫成形の工程において、図５及び図６の金具付ゴム部材Ａを加硫成形するとともに、筒状金具１の端面に滑り止め加工を施す場合の作動及び作用について説明する。
【００２９】
先ず、前記の加硫金型１０を型開きした状態で、所定長さの筒状金具１をキャビティ１４内にセットする。すなわち、図２のように、前記筒状金具１を、キャビティ１４の軸心部において、下型１２に有する支持体２４の支持ピン部２４ａに嵌合し、該筒状金具１の下端面を、支持ピン部２４ａの基部外周に有する段面部２６に当接させて起立状態に支持する。
【００３０】
次に、所定のプレス装置の作動により、上型１１を降下させて該上型１１と下型１２の間に前記中型１３を挟んだ状態で図３のように型閉めする。この型閉め作用により、前記上型１１に有する支持体２３の支持ピン部２３ａが前記筒状金具１の上端部に嵌入するとともに、その基部外周の段面部２５が該筒状金具１の上端面に当接する。そして、この状態で、さらに前記型閉め作用が進むことにより、上下の支持体２３、２４の前記段面部２５、２６に設定された滑り止め加工用の刃部３０、３０が、それぞれ前記筒状金具１の上下両端面を軸方向に押圧し、型閉めのためのプレス圧（通常、２５００ｋｇｆ／ｃｍ^２以上）を利用して、該刃部３０、３０を前記筒状金具１の端面にくい込ませて凹凸を付ける。例えば、前記刃部３０、３０の凹部３０ａおよび凸部３０ｂに対応する山部３ａ及び谷部３ｂを、前記筒状金具端面に周方向に交互に連続して形成する。
【００３１】
こうして完全に型閉めした状態で、ゴム材料を射出してゴム部２を従来と同様に加硫成形する。
【００３２】
これにより、加硫成形の工程において、同時に、筒状金具１の端面に前記刃部３０の形状に対応したセレーション３による滑り止め加工を施すことができ、図５および図６に示す金具付ゴム部材Ａを得ることができる。したがって、滑り止め加工のための工程が不要になり、この種のゴム部材の製造効率を高めることができる。
【００３３】
上記の実施例では、筒状金具１の両端面にセレーション３による滑り止め加工を行う場合を示したが、筒状金具１の一方の端面のみに前記同様のセレーションによる滑り止め加工を施すこともできる。また、セレーション以外の滑り止め加工、例えばローレット状の凹凸による滑り止め加工、あるいは多数の小凸部あるいは小凹部による滑り止め加工を施すこともできる。いずれの場合も、該筒状金具端面に当接する部分には、その形態に対応する滑り止め加工用の刃部を設けておき、上記同様に型閉め作用を利用して凹凸を付ける。なお、型閉め作用を利用して凹凸を付ける加工作用上、図示する実施例のセレーションによる滑り止め加工が形状が安定し確実に加工でき、特に好適である。
【００３４】
【発明の効果】
上記したように本発明の加工方法によれば、金具付ゴム部材の製造において、前記筒状金具端面のセレーション等の滑り止め加工を、加硫成形の工程において、加硫金型による成形のための型閉め作用を利用して行うことができ、滑り止め加工のための工程が不要になり、またこの加工のための作業工数を削減できるとともに、筒状金具のストック量も減少することになり、この種の金具付ゴム部材の生産性向上、コスト低下に大いに寄与できる。
【００３５】
特に、本発明の加硫金型を用いることにより、前記のように加硫成形の工程での滑り止め加工を問題なく容易に実施できることになる。
【図面の簡単な説明】
【図１】本発明の実施に使用する加硫金型の概略を示す加硫成形時の断面図である。
【図２】同上の加硫金型の型閉め前の要部の断面図である。
【図３】同上の加硫金型の型閉め状態の要部の断面図である。
【図４】加硫金型内の上下の支持体の一方の概略を示す斜視図である。
【図５】本発明の加工対象製品である金具付ゴム部材の１例を示す断面図である。
【図６】同上の金具付ゴム部材の平面図である。
【図７】金具付ゴム部材の使用状態を示す断面図である。
【符号の説明】
Ａ金具付ゴム部材
１筒状金具
２ゴム部
３セレーション
３ａ山部
３ｂ谷部
１０加硫金型
１１上型
１２下型
１３中型
１４キャビティ
１５キャビティ構成部分
１６ランナープレート
１７射出口
１８ａランナー溝
１８ｂ注入孔
１９ベースプレート
２１、２２成形面部
２３、２４支持体
２３ａ、２４ａ支持ピン部
２５、２６段面部
３０、３０滑り止め加工用の刃部
３０ａ凹部
３０ｂ凸部[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an anti-slip processing method for a metal end face of a vibration-proof bush or other metal member with a metal fitting used for an automobile suspension or the like, and a vulcanizing mold used for the method.
[0002]
[Prior art]
For example, in a suspension of a vehicle such as an automobile, as a vibration isolating device such as a vibration isolating bush that is used by being interposed between a member on the vehicle body side and a member member such as a suspension, as shown in FIGS. 5 and 6, for example. As described above, a rubber member with a metal fitting having a cylindrical metal fitting 1 as an attachment member attached to a member on the vehicle body side, and a rubber part 2 as a vibration-proof base adhered to the outer periphery of the cylindrical metal fitting 1 by vulcanization. A is known. Further, a rubber member with a fitting of a type in which an outer cylindrical fitting is vulcanized and bonded to the outer periphery of the rubber portion 2 is also known (not shown).
[0003]
When the rubber member A with the fitting is in use, as shown in FIG. 7, a mounting bolt 50 is inserted through the tubular fitting 1 and the tubular fitting 1 is inserted into the plate-like members 51, 51 on the vehicle body side. Are mounted and fixed in a state in which both end surfaces of the are in contact with each other. Further, an outer cylindrical metal member vulcanized and bonded to the rubber portion 2 or its outer periphery is pressed into the collar 52 and fixed to a member member 53 such as a suspension.
[0004]
By the way, in the state of being assembled to the vehicle as described above, in order to stabilize the attachment and fixing to the vehicle body-side members 51, 51 with which the end faces of the cylindrical fitting 1 abut, both end faces of the cylindrical fitting 1 are provided. As shown in FIG. 5 and FIG. 6, anti-slip processing is performed by unevenness such as serrations 3 (see Patent Document 1 below).
[0005]
[Patent Document 1]
JP-A-11-22770 (FIGS. 7 to 9)
[0006]
[Problems to be solved by the invention]
Conventionally, as a method of performing a non-slip process such as serration 3 on the metal fitting end surface of the metal fitting rubber member A, a long pipe material is formed by a cylindrical metal fitting with a metal fitting rubber member A such as a vibration-proof bush. After cutting to the length corresponding to the use as 1, each of the cylindrical fittings 1 is set on a processing machine, and a cutting tool for cutting is pressed against an end face of the cylindrical fitting to perform a process of forming irregularities such as serrations. I was
[0007]
In this case, in the production of the rubber member with a metal fitting, an independent process for performing processing such as serration is required for each cut cylindrical metal fitting, which not only leads to an increase in the number of manufacturing steps, but also increases the stock amount of the cylindrical metal fitting. In addition, the productivity is low, and the productivity is low. In addition, the cost of the metal member with a metal fitting which has been subjected to the above-mentioned non-slip processing has been increased.
[0008]
The present invention has been made in view of the above, and in the manufacture of a rubber member with a metal fitting in which an end face of a cylindrical metal fitting is subjected to a non-slip processing such as serration, the non-slip processing of the cylindrical metal fitting end face is performed by a rubber portion. By simultaneously performing the vulcanization molding process, the need for a non-slip process is eliminated, and the stock of cylindrical fittings can be reduced, increasing productivity and contributing to cost reduction. An object of the present invention is to provide a processing method, and further provide a vulcanization mold that can be suitably used for implementing the processing method.
[0009]
[Means for Solving the Problems]
One aspect of the present invention for solving the above-mentioned problem is a rubber member with a metal fitting having a cylindrical metal fitting as a mounting member and a rubber portion vulcanized and bonded to the outer periphery thereof, wherein an end face of the cylindrical metal fitting is provided. In the step of setting the cylindrical fitting in a vulcanizing mold and vulcanizing and molding the rubber portion, wherein the abutment with the end face of the cylindrical fitting in the vulcanizing mold is performed. A blade portion for non-slip processing is provided on the portion, and by closing the vulcanizing mold, the end face of the cylindrical metal fitting set in the mold is pressed in the axial direction by the blade portion abutting on the end. Then, the end face is subjected to a process of forming irregularities with a blade portion.
[0010]
According to the present invention, in the vulcanization molding step of the rubber portion, when closing the mold in a state in which the cylindrical metal fitting cut to a predetermined length is set in the vulcanization mold, the vulcanization mold in the vulcanization mold The edge of the cylindrical fitting is pressed by a non-slip blade portion provided at a contact portion with the end of the cylindrical fitting, and the end of the cylindrical fitting is pressed by using a pressing pressure for closing the mold. Irregularities are provided by the blade portion. The rubber material is injected and vulcanized in a state in which the mold is completely closed. Thus, in the vulcanization molding step, the end face of the cylindrical metal fitting can be simultaneously subjected to anti-slip processing by unevenness corresponding to the shape of the blade portion.
[0011]
In the above-mentioned processing method, by providing a blade portion for non-slip processing at a contact portion with each end surface of the cylindrical metal fitting in the vulcanizing mold, by closing the mold of the vulcanizing mold, It is possible to perform a process of forming irregularities by biting of the blade portion on both end surfaces of the metal fitting.
[0012]
In addition, it is preferable that the anti-slip process is a process of forming serrations in which peaks and valleys are alternately continuous in the circumferential direction of the end surface of the cylindrical metal fitting. By using the pressing pressure for the above, the non-slip processing by the serration can be easily applied to the end face of the cylindrical metal fitting without any problem and without any extra trouble.
[0013]
Further, another one of the present invention is a rubber member with a metal fitting having a cylindrical metal fitting as a mounting member and a rubber portion which is vulcanized and bonded to the outer periphery of the cylindrical metal fitting, and slides on an end face of the cylindrical metal fitting. A vulcanizing mold used in a method of performing a stopping process, comprising an upper mold and a lower mold that can be closed up and down facing each other, and supports both ends of the cylindrical metal fitting in both upper and lower molds. A body, and at least one of the two supporting members is provided with a non-slip blade portion which is brought into a state of being engaged with the end surface of the cylindrical metal fitting in a closed state at a contact portion with the end surface of the cylindrical metal fitting. It is characterized by becoming. By using this vulcanization mold, the above-mentioned non-slip processing method can be suitably performed.
[0014]
In the vulcanizing mold, the upper and lower supports have an annular stepped surface portion which comes into contact with an end surface of the cylindrical metal fitting at an outer periphery of a base of a support pin portion fitted into both ends of the cylindrical metal fitting in a mold closed state. Then, a blade portion for non-slip processing may be formed on the step surface portion. Thus, by inserting the support pins of the support into both ends of the cylindrical metal fitting set in the vulcanizing mold, the cylindrical metal fitting can be stably held at a predetermined set position, and the mold is closed. In this case, the non-slip blade portion formed on the annular step surface portion provided on the outer periphery of the base portion of the support pin portion can be accurately brought into contact with the end surface of the cylindrical metal fitting without distortion. In addition, anti-slip processing such as serration by the blade portion can be reliably performed.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Next, embodiments of the present invention will be described based on examples shown in the drawings.
[0016]
FIG. 1 is a cross-sectional view of a vulcanization mold used in the practice of the present invention, schematically showing a vulcanization mold, FIG. 2 is a cross-sectional view of a main part of the same vulcanization mold before the mold is closed, and FIG. And FIG. 4 is a perspective view schematically showing one of upper and lower supports in the vulcanization mold. FIGS. 5 and 6 show an example of a rubber member A with metal fittings, which is a product to be processed according to the present invention.
[0017]
The rubber member A with metal fittings shown in FIGS. 5 and 6 has a cylindrical metal fitting 1 as a mounting member to a mating member such as a vehicle body frame, and a rubber portion 2 as a vibration-proof base bonded to the outer periphery by vulcanization. The serration 3 for preventing slippage is formed on both end surfaces of the cylindrical metal fitting 1. Reference numerals 3a and 3b denote peaks and valleys of the serration 3, respectively. The height difference between the peak 3a and the valley 3b of the serration 3 is usually about 0.3 to 0.7 mm. The cylindrical metal fitting 1 is formed by cutting a long metal pipe made of, for example, "carbon steel pipe for machine structure" STKM15C into a predetermined length.
[0018]
First, the vulcanizing mold 10 used in the method of the present invention for performing an anti-slip process on the end face of the cylindrical metal member 1 of the rubber member A with the metal member will be described.
[0019]
As shown in FIGS. 1 to 3, the vulcanizing mold 10 includes an upper mold 11 and a lower mold 12 which are vertically opposed to each other and can be closed with a middle mold 13 interposed therebetween. In a mold closed state (not shown), the upper mold 11, the lower mold 12, and the middle mold 13 form a molding cavity 14 outside the cylindrical fitting 1 set in the vulcanizing mold 10. Is formed. Usually, a plurality of such cavity components 15 are arranged in a single mold as shown in FIG.
[0020]
A runner plate 16 in FIG. 1 is provided so that a rubber material injected from an injection machine (not shown) into one injection port 17 can be injected into the cavity 14 through a runner groove 18a and an injection hole 18b. ing. 19 is a base plate.
[0021]
The upper mold 11 and the lower mold 12 have molding surface portions 21 and 22 which face each other vertically in the cavity forming portion 15 and form the axial end surfaces of the rubber portion 2 of the rubber member A with fittings. I have. In the case of the drawing, the molding surface portions 21 and 22 are formed by nesting dies 27 and 28 which are fitted and fixed in the recesses of the upper mold 11 and the lower mold 12.
[0022]
Supports 23 and 24 having support pin portions 23a and 24a projecting downward or upward are provided at the centers (axial portions) of the molding surface portions 21 and 22, respectively. The upper and lower supports 23 and 24 support the cylindrical fitting 1 set in the cavity 14 at predetermined positions by fitting the support pins 23a and 24a into upper and lower ends thereof as shown in the figure. I can do it.
[0023]
The two support members 23 and 24 are provided with annular step surfaces 25 and 26, respectively, which are abutting portions to the end surface of the cylindrical metal fitting 1 on the outer periphery of the base of the support pin portions 23a and 24a, respectively. 25 and 26 are provided with anti-slipping blade portions 30 and 30 which are engaged with the end face of the cylindrical metal fitting 1 when the mold is closed.
[0024]
In the case of the drawing, as shown in FIG. 4, the blade portion 30 has an uneven shape corresponding to the serration 3 on the metal fitting end face of the rubber member A with metal fittings shown in FIGS. 5 and 6, that is, a peak 3 a and a valley of the serration 3. A concave portion 30a and a convex portion 30b having a shape corresponding to the portion 3b are formed alternately and continuously in the circumferential direction. The amount of penetration of the blade portion 30 into the cylindrical metal fitting end surface in the mold closed state is set according to the height difference between the peak portion 3a and the valley portion 3b of the serration 3.
[0025]
The blade portion 30 is usually provided integrally with the stepped portions 25 and 26 by using a material different from the supports 23 and 24, for example, a hardened material such as high-speed tool steel SKH57. In addition, the blade portion 30 may be formed integrally with the supports 23 and 24. In this case, it is desirable that the entirety of the supports 23 and 24 be formed of the same hardened material as described above.
[0026]
The middle mold 13 has an opening 31 in the center, and is provided so as to define the outer periphery of the cavity 14 between the upper and lower molds 11 and 12 and to mold the outer periphery of the rubber portion 2 of the rubber member A with metal fittings. Has been. In the case of vulcanization molding of a rubber member with a metal fitting having an external metal fitting, it is provided so as to surround the outer circumference of the external metal fitting set on the outer peripheral portion of the cavity 14.
[0027]
In addition, the other structure required for the vulcanization molding of the vulcanization mold 10 can use the same structure as that of the related art, and thus the description thereof is omitted.
[0028]
In the vulcanization molding process including the vulcanization mold 10 including the above-described configuration, the vulcanization molding is performed on the metal member A with the fitting shown in FIGS. 5 and 6 and the non-slip processing is performed on the end surface of the cylindrical fitting 1. The operation and action will be described.
[0029]
First, the cylindrical fitting 1 having a predetermined length is set in the cavity 14 with the vulcanizing mold 10 opened. That is, as shown in FIG. 2, the cylindrical fitting 1 is fitted to the support pin 24 a of the support 24 of the lower mold 12 at the axis of the cavity 14, and the lower end face of the cylindrical fitting 1 is The support pin portion 24a is supported in an upright state by being brought into contact with a step surface portion 26 provided on the outer periphery of the base portion of the support pin portion 24a.
[0030]
Next, the upper die 11 is lowered by the operation of a predetermined press device, and the die is closed as shown in FIG. 3 with the middle die 13 sandwiched between the upper die 11 and the lower die 12. Due to this mold closing action, the support pin portion 23a of the support body 23 of the upper mold 11 is fitted into the upper end of the cylindrical metal fitting 1, and the stepped surface 25 on the outer periphery of the base has the upper end surface of the cylindrical metal fitting 1. Abut. In this state, the mold closing action further proceeds, so that the non-slip blades 30, 30 set on the step surfaces 25, 26 of the upper and lower supports 23, 24 respectively have the cylindrical shape. The upper and lower end surfaces of the metal fitting 1 are pressed in the axial direction, and the blades 30, 30 are inserted into the end face of the cylindrical metal fitting 1 by using a press pressure (typically, 2500 kgf / cm ² or more) for closing the mold. Add irregularities. For example, peaks 3a and valleys 3b corresponding to the concave portions 30a and the convex portions 30b of the blade portions 30, 30 are formed alternately and continuously in the circumferential direction on the end face of the cylindrical metal fitting.
[0031]
With the mold completely closed in this way, the rubber material is injected and the rubber portion 2 is vulcanized and formed in the same manner as in the prior art.
[0032]
Thereby, in the vulcanization molding process, the end face of the cylindrical fitting 1 can be simultaneously subjected to the anti-slip processing by the serrations 3 corresponding to the shape of the blade portion 30, and the rubber with the fitting shown in FIGS. The member A can be obtained. Therefore, a step for non-slip processing is not required, and the production efficiency of this type of rubber member can be improved.
[0033]
In the above-described embodiment, the case where the non-slip processing by the serrations 3 is performed on both end surfaces of the cylindrical metal fitting 1 is shown. However, the same non-slip processing with the serrations may be performed on only one end surface of the cylindrical metal fitting 1. it can. Further, non-slip processing other than serration, for example, anti-slip processing using knurled irregularities, or anti-slip processing using a number of small projections or small recesses can be performed. In any case, a non-slip blade portion corresponding to the form is provided in a portion abutting on the end face of the cylindrical metal fitting, and irregularities are formed by utilizing a mold closing action as described above. It should be noted that the anti-slipping process by serration in the illustrated embodiment is particularly preferable because the shape can be stably and reliably processed due to the processing operation of forming irregularities using the mold closing operation.
[0034]
【The invention's effect】
As described above, according to the processing method of the present invention, in the production of the rubber member with the metal fitting, the anti-slip processing such as serration of the cylindrical metal fitting end face is performed in a vulcanization molding step by molding with a vulcanization mold. It can be carried out by utilizing the mold closing action, eliminating the need for a process for anti-slip processing, reducing the number of work steps for this processing, and reducing the stock of cylindrical fittings. This can greatly contribute to improvement in productivity and cost reduction of this kind of rubber member with metal fittings.
[0035]
In particular, the use of the vulcanization mold of the present invention makes it possible to easily carry out the non-slip processing in the vulcanization molding step without any problem as described above.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view schematically showing a vulcanizing mold used for carrying out the present invention at the time of vulcanization molding.
FIG. 2 is a sectional view of a main part of the vulcanizing mold before the mold is closed.
FIG. 3 is a cross-sectional view of a main part of the vulcanizing mold in the closed state of the same.
FIG. 4 is a perspective view schematically showing one of upper and lower supports in a vulcanization mold.
FIG. 5 is a cross-sectional view showing an example of a rubber member with a fitting, which is a product to be processed according to the present invention.
FIG. 6 is a plan view of the rubber member with the fitting.
FIG. 7 is a cross-sectional view showing a usage state of a rubber member with a fitting.
[Explanation of symbols]
A Rubber member with metal fitting 1 Cylindrical metal fitting 2 Rubber part 3 Serration 3a Peak 3b Valley 10 Vulcanizing mold 11 Upper mold 12 Lower mold 13 Middle mold 14 Cavity 15 Cavity component 16 Runner plate 17 Injection port 18a Runner groove 18b Injection Hole 19 Base plate 21, 22 Molding surface 23, 24 Supporting body 23a, 24a Support pin 25, 26 Step surface 30, 30 Blade part 30a for non-slip processing Recess 30b Convex

Claims

取付部材としての筒状金具と、その外周に加硫接着されたゴム部とを有してなる金具付ゴム部材において、前記筒状金具の端面に滑り止め加工を施す方法であって、
加硫金型内に前記筒状金具をセットして前記ゴム部を加硫成形する工程において、加硫金型内における筒状金具端面との当接部分に滑り止め加工用の刃部を設けておき、この加硫金型の型閉めにより、金型内にセットされた前記筒状金具の端面をこれに当接する前記刃部で軸方向に押圧して、該端面に刃部により凹凸を付ける加工を施すことを特徴とする金具付ゴム部材の金具端面の滑り止め加工方法。A method for performing a non-slip process on an end surface of the cylindrical metal fitting, wherein the cylindrical metal fitting as a mounting member, and a rubber member with a metal fitting having a rubber portion vulcanized and bonded to the outer periphery thereof,
In the step of setting the cylindrical metal fitting in a vulcanizing mold and vulcanizing and molding the rubber portion, providing a blade portion for non-slip processing at a contact portion with the cylindrical metal fitting end surface in the vulcanizing mold. In addition, by closing the mold of the vulcanizing mold, the end face of the cylindrical fitting set in the mold is pressed in the axial direction by the blade portion abutting on the end, and the unevenness is formed on the end face by the blade portion. A non-slip processing method of a metal fitting end face of a metal member with a metal fitting, which is characterized by performing a process of attaching.

前記加硫金型内における前記筒状金具の両端面との当接部分に、それぞれ滑り止め加工用の刃部を設けておき、この加硫金型の型閉めによって、筒状金具の両端面に前記刃部のくい込みによる凹凸を付ける加工を施す請求項１に記載の金具付ゴム部材の金具端面の滑り止め加工方法。In each of the vulcanizing dies, a non-slip blade portion is provided at a contact portion with the both end surfaces of the cylindrical metal member, and both ends of the cylindrical metal member are closed by closing the mold of the vulcanizing metal member. 2. The method of non-slip processing of a metal fitting end face of a metal member with metal fitting according to claim 1, wherein the metal member is subjected to a process of forming irregularities due to biting of the blade portion.

前記滑り止め加工が、筒状金具端面の周方向に山部と谷部が交互に連続するセレーションを形成する加工である請求項１または２に記載の金具付ゴム部材の金具端面の滑り止め加工方法。The non-slip processing of the metal fitting end surface of the metal member with a metal fitting according to claim 1 or 2, wherein the non-slip processing is a processing of forming serrations in which peaks and valleys are alternately continuous in the circumferential direction of the cylindrical metal fitting end face. Method.

取付部材としての筒状金具と、その外周に加硫接着されたゴム部とを有してなる金具付ゴム部材において、前記筒状金具の端面に滑り止め加工を施す方法に用いる加硫金型であって、
上下に相対向して型閉め可能な上型と下型とを備え、上下両型にそれぞれ前記筒状金具の両端部を支持する支持体を有し、両支持体の少なくとも一方の前記筒状金具端面との当接部分に、型閉め状態において前記筒状金具端面に対してくい込み状態になる滑り止め加工用の刃部が設けられてなることを特徴とする加硫金型。In a rubber member with a metal fitting having a cylindrical metal fitting as a mounting member and a rubber portion which is vulcanized and bonded to the outer periphery thereof, a vulcanizing mold used for a method of performing a non-slip process on an end surface of the cylindrical metal fitting. And
An upper mold and a lower mold are provided which can be closed in opposite directions, and upper and lower molds each have a support for supporting both ends of the tubular metal fitting, and at least one of the two supports has the cylindrical shape. A vulcanizing mold, characterized in that a vulcanizing mold is provided with a non-slip blade portion which is brought into a state of being inserted into the cylindrical metal fitting end face when the mold is closed in a contact portion with the fitting end face.

前記上下の支持体は、型閉め状態において筒状金具の両端部に嵌入する支持ピンの基部外周に前記筒状金具端面に当接する環状の段面部を有し、該段面部に滑り止め加工用の刃部が形成されてなる請求項４に記載の加硫金型。The upper and lower supports each have an annular stepped surface that comes into contact with an end surface of the cylindrical metal fitting at an outer periphery of a base of a support pin that is fitted into both ends of the cylindrical metal fitting when the mold is closed. 5. The vulcanizing mold according to claim 4, wherein said blade portion is formed.