JPH11216783A - Manufacture of rubber crawler - Google Patents
Manufacture of rubber crawlerInfo
- Publication number
- JPH11216783A JPH11216783A JP3668698A JP3668698A JPH11216783A JP H11216783 A JPH11216783 A JP H11216783A JP 3668698 A JP3668698 A JP 3668698A JP 3668698 A JP3668698 A JP 3668698A JP H11216783 A JPH11216783 A JP H11216783A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- core
- pair
- lower mold
- core metal
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明はゴムク−ラ中に埋設
する芯金をゴム中の所定の位置に配置するゴムク−ラの
製法を提供するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention provides a method for manufacturing a rubber cooler in which a metal core embedded in the rubber cooler is arranged at a predetermined position in the rubber.
【０００２】[0002]
【従来の技術】芯金を埋設したゴムク−ラの製法にあっ
ては、埋設される芯金をモ−ルドの所定の位置にセット
しなくてはならないが、通常は芯金に形成された一対の
角部が嵌り合う窪みを形成した下モ−ルドを備え、この
窪み内に芯金の角部を嵌合して芯金を所定の位置にセッ
トし、これに上モ−ルドを合わせて未加硫ゴムを充填し
て加硫成型するものである。2. Description of the Related Art In a method of manufacturing a rubber cooler in which a core is buried, the core to be buried must be set at a predetermined position of a mold. A lower mold having a recess in which a pair of corners are fitted is provided. The corner of the core is fitted into the recess to set the core in a predetermined position, and the upper mold is aligned with this. Is filled with unvulcanized rubber and vulcanized.
【０００３】そして、通常はゴムク−ラの内周面に形成
される突起と芯金の角部とは略同じ形状であるため、突
起を形成する下モ−ルドの窪みは芯金の角部とはほぼ同
じ形状となっており、このため芯金の角部をこれに嵌合
するだけで芯金は正確な位置にセットされることにな
る。[0003] Since the projections formed on the inner peripheral surface of the rubber cooler and the corners of the metal core are generally of substantially the same shape, the depressions of the lower mold forming the projections are formed at the corners of the metal core. Are substantially the same in shape, so that the core is set at an accurate position only by fitting the corners of the core to this.
【０００４】しかるにゴムク−ラの内周面に形成される
突起と芯金の角部の形状とが大きく異なっている場合に
は、下モ−ルドの窪み内に芯金の角部を挿入しても芯金
の正確な位置決めはなされない。そして芯金の位置決め
が不正確なまま加硫成型がなされてゴムク−ラが成型さ
れた場合には、ゴムク−ラのバランスがくずれるために
走行時に不測の振動が生じたり、スプロケット、アイド
ラ−、ロ−ラ等との係合に不具合を生じ脱輪の発生も多
くなってしまう。However, if the shape of the protrusion formed on the inner peripheral surface of the rubber cooler is significantly different from the shape of the corner of the metal core, the corner of the metal core is inserted into the recess of the lower mold. However, accurate positioning of the core metal is not performed. If the rubber cooler is molded by vulcanization molding with the positioning of the core metal being inaccurate, unexpected vibration may occur during traveling due to the imbalance of the rubber cooler, sprockets, idlers, Failure to engage with a roller or the like occurs, and the occurrence of derailing increases.
【０００５】[0005]
【発明が解決しようとする課題】本発明はかかるモ−ル
ド内での芯金の位置決めを正確にする方法を提供するも
のであり、加硫中におけるゴムの流れにも芯金のセット
位置がずれることのないゴムク−ラの製法を提供するも
のである。SUMMARY OF THE INVENTION The present invention provides a method for accurately positioning a cored bar in such a mold. The set position of the cored bar is also determined by the flow of rubber during vulcanization. An object of the present invention is to provide a method for producing a rubber cooler that does not shift.
【０００６】[0006]
【課題を解決するための手段】本発明は以上の課題を解
決するためになされたものであって、その要旨は、ゴム
クロ−ラの内周面を画定するキャビテイを有する下モ−
ルドと、ゴムクロ−ラの外周面を画定するキャビテイを
有する上モ−ルドとを合致させ、キャビティ内部に芯金
を配置し、これに未加硫ゴムを充填して加硫成型するゴ
ムクロ−ラの製法において、下モ−ルドのキャビテイに
ゴムクロ−ラの突起を形成する一対の窪みを一定ピッチ
をもって連設し、更に当該一対の窪み間に芯金の中央部
を挟む突条を形成し、芯金に形成された一対の角部を前
記窪み内に納めると共に当該突条間に芯金の中央部を挟
んで芯金を下モ−ルドにセットし、その後スチ−ルコ−
ド及び未加硫ゴムをキャビテイ内に配置かつ充填し、未
加硫ゴムを加硫成型するゴムクロ−ラの製法にかかるも
のである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and the gist of the present invention is to provide a lower motor having a cavity defining an inner peripheral surface of a rubber crawler.
The rubber mold is formed by aligning a mold with an upper mold having a cavity defining an outer peripheral surface of a rubber crawler, placing a metal core in the cavity, filling the unvulcanized rubber, and vulcanizing and molding. In the manufacturing method, a pair of dents forming rubber rubber protrusions are continuously provided at a constant pitch in the lower mold cavity, and a ridge sandwiching a central portion of the core metal is formed between the pair of dents. A pair of corners formed on the cored bar are placed in the recess, and the cored bar is set in the lower mold with the central portion of the cored bar sandwiched between the ridges.
And a vulcanized rubber are placed and filled in a cavity, and the unvulcanized rubber is vulcanized and molded.
【０００７】そして、好ましくは、一対の突条間に芯金
の中央部を挟んだ際、突条の先端は芯金中央部の厚さの
略半分程度に達するもので、更に突条の強度の面を考慮
すると、これが立ち上がる下モ−ルドにおける基部の幅
が５〜１５ｍｍであるのが好ましい。Preferably, when the central portion of the core is sandwiched between a pair of ridges, the tip of the ridge reaches approximately half the thickness of the central portion of the core. In consideration of the above aspect, it is preferable that the width of the base in the lower mold where it rises is 5 to 15 mm.
【０００８】[0008]
【発明の実施の形態】本発明は以上の構成を備えたもの
であり、下モ−ルドに芯金が正確にセットされることと
なり、これによって得られるゴムク−ラはその内部に埋
設された芯金の位置決めが正確になり、所期のゴムク−
ラを得ることができることとなるのである。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention is provided with the above-mentioned structure, and the core metal is accurately set in the lower mold, and the rubber cooler obtained by this is embedded in the inside. Accurate core metal positioning,
Can be obtained.
【０００９】そして、これをゴムク−ラの側から考察す
れば極めて耐久性の高いゴムク−ラを得ることとなるも
のである。即ち、ゴムク−ラにおける一対の突起間はス
プロケットやアイドラ−の縁端部が接触しつつ転動する
こととなるが、芯金の突起間の中央部とゴムクロ−ラの
内周面であるゴム部上を交互に転動し、このためゴム部
間に集中して加わる歪みによって芯金の中央部とゴム部
との接着界面に繰り返し歪みが集中し、ここに剥離を生
じやすくなる。Considering this from the side of the rubber cooler, it is possible to obtain an extremely durable rubber cooler. That is, the sprocket or idler rolls between the pair of projections of the rubber roller while contacting the edges thereof. The rolling occurs alternately on the portions, so that the strain concentrated between the rubber portions causes the strain to be repeatedly concentrated on the bonding interface between the center portion of the cored bar and the rubber portion, and peeling is likely to occur there.
【００１０】しかるに、この下モ−ルドにおける一対の
突条、即ち芯金をモ−ルド内の所定の位置にセットする
一対の突条によって、芯金の中央部とゴム部との境界部
に凹条が形成されることになる。従って、この凹条がス
プロケット等の転動時の歪みを吸収しかつ分散するもの
であって、この部位の接着剥離の発生を極めて低減する
こととなるのである。However, a pair of ridges in the lower mold, that is, a pair of ridges for setting the mandrel at a predetermined position in the mold, causes a boundary between the central portion of the mandrel and the rubber portion. A concave streak will be formed. Therefore, the concave stripes absorb and disperse the distortion during rolling of the sprocket and the like, and the occurrence of the adhesion peeling at this portion is extremely reduced.
【００１１】[0011]
【実施例】以下、本発明を図面をもって更に詳細に説明
する。図１は本発明に用いられる下モ−ルドの中央断面
図であり、図２は下モ−ルドの窪み部における断面図で
ある。そして図３は下モ−ルドのキャビティ平面図であ
る。図中、符号１は下モ−ルドであり、この下モ−ルド
１の中央のキャビティ２にはゴムクロ−ラの内周面より
突出する突起を形成する一対の窪み３、３が備えられ、
これが長手方向に一定ピッチをもって連続している。そ
して、この一対の窪み３、３間の前後に一対の突条４、
４が窪み３、３とは逆側に突出して形成されたものであ
る。BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG. 1 is a central sectional view of a lower mold used in the present invention, and FIG. 2 is a sectional view of a concave portion of the lower mold. FIG. 3 is a plan view of the lower mold cavity. In the figure, reference numeral 1 denotes a lower mold, and a central cavity 2 of the lower mold 1 is provided with a pair of depressions 3 and 3 which form a projection protruding from the inner peripheral surface of the rubber crawler.
This is continuous at a constant pitch in the longitudinal direction. And, a pair of ridges 4 before and after the pair of recesses 3, 3.
Numeral 4 is formed so as to protrude to the side opposite to the dents 3, 3.
【００１２】下モ−ルド１のキャビティ２内にセットさ
れる芯金１０はその角部１２を前記窪み３、３内に入れ
ると共に、芯金１０の中央部１３を一対の突条４、４間
にこれを挟み込ませてセットすることになる。即ち、芯
金１０は角部１２が下モ−ルド１のキャビティ２内に挿
入され、中央部１３が一対の突条４、４にて挟まれてキ
ャビティ２内の所定の位置にセットされる。尚、この芯
金１０にあって、角部１２は芯金１０の幅方向に長尺の
形状としたものであり、下モ−ルド１の窪み３の形状と
は大きく異なっている例である。そしてこの状態で上モ
−ルドを合わせ、これによって構成されるキャビティ内
にスチ−ルコ−ドを張設し、かつ未加硫ゴムを充填して
加硫することとなる。A metal core 10 set in the cavity 2 of the lower mold 1 has its corners 12 inserted into the recesses 3 and 3 and the central part 13 of the metal core 10 is connected to a pair of ridges 4 and 4. It will be set with this in between. That is, the core 12 is set at a predetermined position in the cavity 2 with the corner 12 inserted into the cavity 2 of the lower mold 1 and the center 13 sandwiched between the pair of protrusions 4, 4. . In this core 10, the corners 12 are elongated in the width direction of the core 10, which is an example that is significantly different from the shape of the depression 3 of the lower mold 1. . In this state, the upper mold is adjusted, a steel cord is stretched in the cavity formed by this, and the unvulcanized rubber is filled and vulcanized.
【００１３】図４は本発明の製法にて得られたゴムクロ
−ラの内周側平面図、図５は外周側平面図、図６は右側
面図である。又、図７はＡ−Ａ線での断面図であり、図
８はＢ−Ｂ線での断面図である。図中、符号２０はゴム
クロ−ラであり、これは無端状のゴム弾性体２１を基体
とし、芯金１０の翼部１１がここに埋設され、これらを
外囲いしてスチ−ルコ−ド２２が共に埋設されている。
そして芯金１０の角部１２に対してはその前後面１２
1 、１２2 にゴム弾性体２２と一体としたゴム部材２３
がこれを覆ってゴムクロ−ラの駆動突起２４が形成され
たものである。FIG. 4 is a plan view of the inner circumference of the rubber crawler obtained by the method of the present invention, FIG. 5 is a plan view of the outer circumference, and FIG. 6 is a right side view. FIG. 7 is a sectional view taken along line AA, and FIG. 8 is a sectional view taken along line BB. In the figure, reference numeral 20 denotes a rubber crawler, which has an endless rubber elastic body 21 as a base, a wing portion 11 of a cored bar 10 is buried therein, and a steel code 22 is formed by surrounding these. Are buried together.
The front and rear surfaces 12 of the corner 12 of the metal core 10
1, 12 2 rubber member 23 which is integral with the rubber elastic body 22 in
The rubber protrusions 24 are formed so as to cover them.
【００１４】そして、芯金１０の中央部１３はゴムクロ
−ラの内周面と略同一平面とされ、前後端には溝２５が
形成されるが、これは前記した下モ−ルド１に形成した
一対の突条４、４にて形成されたものである。尚、溝２
５にて挟まれたゴム部３０は芯金１０の中央部１３より
やや内周側に背丈を高くしておくのがよい。符号２６は
ゴムラグである。The central portion 13 of the metal core 10 is substantially flush with the inner peripheral surface of the rubber crawler. Grooves 25 are formed at the front and rear ends, which are formed in the lower mold 1 described above. It is formed by a pair of projecting ridges 4, 4. Groove 2
It is preferable that the height of the rubber portion 30 sandwiched between 5 is slightly higher than the central portion 13 of the metal core 10 on the inner peripheral side. Reference numeral 26 denotes a rubber lug.
【００１５】本発明の製法によって得られるゴムクロ−
ラ２０は以上の通りであって、ゴム中に埋設された芯金
１０はゴムクロ−ラの所定の位置に配置されて埋設され
るものであり、しかも芯金１０の中央部の縁端に下モ−
ルド１の突条４にて形成される溝２５が構成されるもの
である。The rubber cloth obtained by the production method of the present invention
The rubber 20 is as described above. The metal core 10 buried in the rubber is arranged and buried in a predetermined position of the rubber crawler. Mo
A groove 25 formed by the ridge 4 of the screw 1 is formed.
【００１６】一般に、ゴムクロ−ラにあって、スプロケ
ットやアイドラ−はゴムクロ−ラの内周面より突出する
一対の突部間を転動する形式のものが殆どであるが、こ
れは埋設された芯金の中央部との衝突が繰り返されるこ
ととなるため、ここに騒音と振動が生ずることとなる。
しかるに、本発明によって得られたゴムクロ−ラ２０は
かかる衝突に基づく騒音と振動を低減するものとなる。
即ち、芯金の中央部１３の幅方向縁部にそって溝部２５
が形成されることから、スプロケットやアイドラ−は中
央部１３から芯金１０の存在しないゴム部３０に移動す
る際、及びゴム部３０から芯金１０の中央部１３へ乗り
上げる際に、特にゴム部３０に集中する歪みをこの溝２
５にて吸収しかつ歪みを分散することとなり、スプロケ
ットやアイドラ−の転動をスム−ズになし、かつゴム部
３０への亀裂、両者の界面剥離を生ずることなく走行す
ることができることとなったものである。Generally, most of rubber crawlers have a sprocket or an idler that rolls between a pair of protrusions protruding from the inner peripheral surface of the rubber cradle, but these are buried. Since the collision with the center portion of the cored bar is repeated, noise and vibration are generated here.
However, the rubber crawler 20 obtained according to the present invention reduces noise and vibration caused by such a collision.
That is, the groove 25 is formed along the widthwise edge of the central portion 13 of the metal core.
When the sprocket or idler moves from the central portion 13 to the rubber portion 30 where the metal core 10 does not exist, and when the sprocket or idler rides from the rubber portion 30 to the central portion 13 of the metal core 10, particularly the rubber portion is used. Distortion concentrated on 30
5 absorbs and disperses the strain, so that the sprocket and idler can smoothly roll, and can travel without causing cracks in the rubber portion 30 and peeling off at the interface between the two. It is a thing.
【００１７】[0017]
【発明の効果】本発明のゴムクロ−ラの製法は以上の通
りであって、芯金をゴムクロ−ラの所定位置に埋設可能
としたものであって、更にこれにより得られるゴムクロ
−ラは極めて特徴のあるものであり、その工業的価値は
高い。As described above, the method of producing the rubber crawler of the present invention is such that the core metal can be embedded in a predetermined position of the rubber crawler. It is characteristic and its industrial value is high.
【図１】図１は本発明に用いられる下モ−ルドの中央断
面図である。FIG. 1 is a central sectional view of a lower mold used in the present invention.
【図２】図２は下モ−ルドの窪み部における断面図であ
る。FIG. 2 is a cross-sectional view of a depression in a lower mold.
【図３】図３は下モ−ルドの平面図である。FIG. 3 is a plan view of a lower mold.
【図４】図４は本発明の製法にて得られたゴムクロ−ラ
の内周側平面図である。FIG. 4 is an inner peripheral plan view of a rubber crawler obtained by the production method of the present invention.
【図５】図５は図４のゴムクロ−ラの外周側平面図であ
る。FIG. 5 is a plan view of an outer peripheral side of the rubber crawler of FIG. 4;
【図６】図６は図５のゴムクロ−ラの右側面図である。FIG. 6 is a right side view of the rubber crawler shown in FIG. 5;
【図７】図７はＡ−Ａ線での断面図である。FIG. 7 is a sectional view taken along line AA.
【図８】図８はＢ−Ｂ線での断面図である。FIG. 8 is a sectional view taken along line BB.
１‥‥下モ−ルド、 ２‥‥下モ−ルドのキャビティ、 ３‥‥ゴムクロ−ラの突起を形成する窪み、 ４‥‥窪み間に備えた突条、 １０‥‥芯金、 １１‥‥芯金の翼部、 １２‥‥芯金の角部、 １２1 、１２2 ‥‥芯金の角部の前後面、 １３‥‥芯金の中央部、 ２０‥‥ゴムクロ−ラ、 ２１‥‥ゴム弾性体、 ２２‥‥スチ−ルコ−ド、 ２３‥‥芯金の角部の前後面を覆うゴム部材、 ２４‥‥ゴムクロ−ラの駆動突起、 ２５‥‥窪み間に備えた突条にて構成される溝、 ２６‥‥ゴムラグ、 ３０‥‥隣接する芯金間のゴムクロ−ラ中央部のゴム
部。1) Lower mold, 2) Lower mold cavity, 3) Depression forming protrusion of rubber crawler, 4) Protrusion provided between depressions, 10) Core, 11) ‥ wings of the core, 12 the corners of ‥‥ metal core, 12 1, 12 2 front and rear surfaces of the corners of ‥‥ metal core, 13 the central portion of ‥‥ core metal 20 ‥‥ Gomukuro - la, 21 ‥ {Rubber elastic body, 22} Steel cord, 23> Rubber member covering front and rear surfaces of corners of cored bar, 24} Driving projection of rubber crawler, 25} Ridge provided between recesses 26 mm rubber lug, 30 mm rubber portion at the center of rubber crawler between adjacent metal cores.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 ＦＩ Ｂ６２Ｄ 55/32 Ｂ６２Ｄ 55/32 // Ｂ２９Ｋ 21:00 105:22 Ｂ２９Ｌ 31:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI B62D 55/32 B62D 55/32 // B29K 21:00 105: 22 B29L 31:00
Claims (3)
テイを有する下モ−ルドと、ゴムクロ−ラの外周面を画
定するキャビテイを有する上モ−ルドとを合致させ、キ
ャビティ内部に芯金を配置し、これに未加硫ゴムを充填
して加硫成型するゴムクロ−ラの製法において、下モ−
ルドのキャビテイにゴムクロ−ラの突起を形成する一対
の窪みを一定ピッチをもって連設し、更に当該一対の窪
み間に芯金の中央部を挟む突条を形成し、芯金に形成さ
れた一対の角部を前記窪み内に納めると共に当該突条間
に芯金の中央部を挟んで芯金を下モ−ルドにセットし、
その後スチ−ルコ−ド及び未加硫ゴムをキャビテイ内に
配置かつ充填し、未加硫ゴムを加硫成型することを特徴
とするゴムクロ−ラの製法。A lower mold having a cavity defining an inner peripheral surface of a rubber crawler is matched with an upper mold having a cavity defining an outer peripheral surface of a rubber crawler. In a method of producing a rubber crawler in which unvulcanized rubber is filled and vulcanized and molded, the lower mold is used.
A pair of cavities forming rubber-claw projections are continuously provided at a constant pitch in the cavity of the metal bar, and a ridge is formed between the pair of cavities to sandwich a central portion of the core metal. Of the core is set in the lower mold with the center of the core sandwiched between the ridges,
Thereafter, a steel cord and unvulcanized rubber are placed and filled in a cavity, and the unvulcanized rubber is vulcanized and molded.
の先端は芯金中央部の厚さの略半分程度に達する請求項
第１項記載のゴムク−ラの製法。2. The method according to claim 1, wherein when the central portion of the core is sandwiched between the ridges, the tip of the ridge reaches approximately half the thickness of the central portion of the core.
〜１５ｍｍである請求項第１項記載のゴムク−ラの製
法。3. A base having a width of 5 in a lower mold of a ridge.
The method for producing a rubber cooler according to claim 1, wherein the diameter is from 15 to 15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3668698A JP3892571B2 (en) | 1998-02-02 | 1998-02-02 | Manufacturing method of rubber crawler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3668698A JP3892571B2 (en) | 1998-02-02 | 1998-02-02 | Manufacturing method of rubber crawler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11216783A true JPH11216783A (en) | 1999-08-10 |
| JP3892571B2 JP3892571B2 (en) | 2007-03-14 |
Family
ID=12476726
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3668698A Expired - Fee Related JP3892571B2 (en) | 1998-02-02 | 1998-02-02 | Manufacturing method of rubber crawler |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3892571B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009061829A (en) * | 2007-09-04 | 2009-03-26 | Bridgestone Corp | Rubber crawler and core therefor |
| EP2275326A3 (en) * | 2009-07-17 | 2011-05-11 | Camoplast Inc. | Endless track for traction of a vehicle, with enhanced elastomeric material curing capability |
| US9731781B2 (en) | 2009-07-17 | 2017-08-15 | Camso Inc. | Endless track for traction of a vehicle, with enhanced elastomeric material curing capability |
-
1998
- 1998-02-02 JP JP3668698A patent/JP3892571B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009061829A (en) * | 2007-09-04 | 2009-03-26 | Bridgestone Corp | Rubber crawler and core therefor |
| EP2275326A3 (en) * | 2009-07-17 | 2011-05-11 | Camoplast Inc. | Endless track for traction of a vehicle, with enhanced elastomeric material curing capability |
| US8628152B2 (en) | 2009-07-17 | 2014-01-14 | Camoplast Solideal Inc. | Endless track for traction of a vehicle, with enhanced elastomeric material curing capability |
| US9731781B2 (en) | 2009-07-17 | 2017-08-15 | Camso Inc. | Endless track for traction of a vehicle, with enhanced elastomeric material curing capability |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3892571B2 (en) | 2007-03-14 |
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