JP2000085028A - Method for molding rubber crawler - Google Patents
Method for molding rubber crawlerInfo
- Publication number
- JP2000085028A JP2000085028A JP25585298A JP25585298A JP2000085028A JP 2000085028 A JP2000085028 A JP 2000085028A JP 25585298 A JP25585298 A JP 25585298A JP 25585298 A JP25585298 A JP 25585298A JP 2000085028 A JP2000085028 A JP 2000085028A
- Authority
- JP
- Japan
- Prior art keywords
- rubber
- rubber crawler
- mold
- projections
- crawler
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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】本発明は一対の突起を備えた
芯金を埋設した無端のゴムクロ−ラの成型方法に関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for molding an endless rubber crawler having a core bar having a pair of projections embedded therein.
【0002】[0002]
【従来の技術】ゴムクロ−ラは建設機械や農機具の走行
部として広く用いられており、通常は一対の突起を備え
た芯金をゴム中に埋設し、その突起を内周面より突出さ
せてなる構造を有している。図5に示したものはゴムク
ロ−ラの基本的な成型方法であり、図に示すようにメイ
ンコ−ド31を埋設した有端の未加硫帯状ゴム32を、
上下の型(モ−ルド)33、34にて挟持すると共に、
加圧・加熱下に前記未加硫帯状ゴム32を加硫して有端
の帯状ゴム35を得、その後、有端の帯状ゴム35の食
い違い状の両端部36、37を重合し、端部接合用の上
下の型38、39によって両端部を加硫接合し、無端の
ゴムクロ−ラ30を得るものである。2. Description of the Related Art A rubber crawler is widely used as a traveling part of construction equipment and agricultural equipment. Usually, a metal core having a pair of projections is embedded in rubber and the projections are protruded from an inner peripheral surface. It has the following structure. FIG. 5 shows a basic method of molding a rubber crawler. As shown in FIG. 5, an end unvulcanized rubber band 32 having a main code 31 embedded therein is removed.
While holding the upper and lower molds (mold) 33, 34,
The unvulcanized belt-shaped rubber 32 is vulcanized under pressure and heat to obtain an end-shaped band-shaped rubber 35, and thereafter, the staggered ends 36 and 37 of the end-shaped band-shaped rubber 35 are polymerized to form an end. Both ends are vulcanized and joined by upper and lower molds 38 and 39 for joining to obtain an endless rubber crawler 30.
【0003】しかしながら、このような従来の加硫方法
によって成型されたゴムクロ−ラにあっては製造工程に
多大な時間を要していた。又、成型用型及びこれに要す
る熱盤が長大化して大きなスペ−スの設置場所を要する
他、無端化するための端部のみの接合加硫工程を要し
た。[0003] However, in such a rubber crawler molded by the conventional vulcanization method, a great deal of time was required for the manufacturing process. In addition, the molding die and the hot plate required for the molding are long, so that a large space is required for installation, and a joining and vulcanizing step of only an end portion for endlessness is required.
【0004】更に、有端の帯状ゴムの両端部を加硫して
接合せねばならず、無端のゴムクロ−ラが円周上で全て
均一な諸特性を備えさせることは不可能であるり、特に
メインコ−ドの両端が重ねられて無端化されるため長さ
方向における剛性が部分的に大きく異なり、これが原因
で騒音、振動等が発生することとなり、高速走行にも耐
えられるものではなく、これらの課題を解消したゴムク
ロ−ラの出現が待たれていた。Further, both ends of the end-shaped rubber band must be vulcanized and joined, and it is impossible for the endless rubber crawler to have all the uniform characteristics on the circumference. Particularly, since both ends of the main code are overlapped and made endless, the rigidity in the length direction partially differs greatly, which causes noise, vibration, etc., which cannot withstand high-speed running. The appearance of a rubber crawler that has solved these problems has been awaited.
【0005】このようなことから、本出願人は従来の成
型方法における課題を解決して、全長が均質な強度特性
を備え、特に高速走行に対応できるようにスパイラル状
のメインコ−ドの埋設を可能とした無端のゴムクロ−ラ
の成型方法を提案した。この成型方法はゴムクロ−ラの
内周面と同じ形状をなし、しかもゴムクロ−ラの幅方向
の左右に分割される内型とこの外周面と同じ形状をなす
外型とを用い、内型の外周上においてゴムクロ−ラの構
成部品である接地部となるラグゴム、内周側となる内周
ゴム、側部となるサイドゴム、スプロケットの案内ガイ
ドを構成する突起ゴム、バイアスコ−ド、メインコ−ド
が載置され、外型の縮径加圧により加硫に供される。そ
して、メインコ−ドは内型の外周上に突起ゴム及び内周
ゴムが載置された後、スパイラル状に巻き付けられ、そ
の後に加圧・加熱され、内外型間において一挙に加硫成
型が行われる。次いで、外型を径方向に拡開して外型を
ゴムクロ−ラの外周面から離型させ、その後、内型を左
右方向に移動分割してゴムクロ−ラの内周面より離型さ
せるものである。[0005] In view of the above, the present applicant has solved the problem in the conventional molding method, and embeds a spiral-shaped main code so as to have a uniform strength characteristic over its entire length and to cope particularly with high-speed running. A possible endless rubber crawler molding method was proposed. This molding method uses an inner mold that has the same shape as the inner peripheral surface of the rubber crawler and is divided into right and left in the width direction of the rubber crawler and an outer mold that has the same shape as the outer peripheral surface. On the outer periphery, lug rubber as a grounding part, inner peripheral rubber as an inner peripheral side, side rubber as a side part, protrusion rubber as a guide guide for a sprocket, a bias code, and a main code, which are components of a rubber crawler, are provided. It is placed and subjected to vulcanization by reducing the diameter of the outer mold. Then, the main code is formed by placing the protruding rubber and the inner peripheral rubber on the outer periphery of the inner mold, winding the spiral in a spiral shape, and then pressurizing and heating, and vulcanizing and molding between the inner and outer molds at once. Will be Next, the outer die is expanded in the radial direction to release the outer die from the outer peripheral surface of the rubber crawler, and then the inner die is moved and divided in the left-right direction to be released from the inner peripheral surface of the rubber crawler. It is.
【0006】しかるに、内型を左右に分割して移動する
に当って、ゴムクロ−ラの内周面が左右に分割されやす
い形状である必要があり、ゴムクロ−ラの中央に一つの
突起が形成されたもの以外は内型を左右に分割移動する
ことはできず、例えば、一対の突起を備えた芯金をゴム
中に埋設し、その突起を内周面より突出させてなる構造
を有するゴムクロ−ラの成型方法には適用することは不
可能であった。However, when the inner die is divided and moved to the left and right, the inner peripheral surface of the rubber crawler must have a shape that can be easily divided into left and right, and one projection is formed at the center of the rubber crawler. The inner mold cannot be moved to the left or right except for the rubber mold, for example, a rubber clasp having a structure in which a metal core having a pair of protrusions is embedded in rubber and the protrusions protrude from the inner peripheral surface. -It was not possible to apply to the molding method of la.
【0007】[0007]
【発明が解決しようとする課題】本発明は、上記提案の
ゴムクロ−ラの成型方法を更に改良して、一対の突起を
備えた芯金をゴムクロ−ラ中に埋設したゴムクロ−ラに
適用したものであって、スパイラル状のメインコ−ドの
埋設を可能とし、更に円周上均質な強度特性を備えさせ
ることを可能にして、無端のゴムクロ−ラの成型方法を
提供することを目的とする。SUMMARY OF THE INVENTION The present invention is a further improvement of the method of molding a rubber crawler proposed above, and is applied to a rubber crawler having a core having a pair of projections embedded in the rubber crawler. An object of the present invention is to provide a method of molding an endless rubber crawler, which enables embedding of a spiral main code, and further allows provision of uniform circumferential strength characteristics. .
【0008】[0008]
【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、無端
のゴムクロ−ラの外周面を画定する円周方向に複数に分
割された外型とゴムクロ−ラの内周面を画定する内型と
の間で未加硫ゴム部材を加硫するゴムクロ−ラの成型方
法において、中央部に芯金の一対の突起が納まる輪状窪
みを備え、ゴムクロ−ラの幅方向に左右に分割可能な内
型の外周上にてゴムクロ−ラの内周側を構成する内周未
加硫ゴムシ−トを幅方向左右に巻き付け、内型の中央部
に左右に一対の窪みを形成した加硫ゴムバンドを巻き付
け、一対の突起を備えた芯金の突起を前記加硫ゴムバン
ドの窪み内に嵌め合わせてなり、この芯金を囲んでメイ
ンコ−ドをスパイラル状に巻き付け、更にゴムクロ−ラ
の外周側を構成する外周未加硫ゴムシ−トを巻き付け、
該ゴムクロ−ラ構成部品の外側に円周方向に分割され径
方向に移動可能な外型を配置し、該外型を径方向に縮径
加圧して前記ゴムクロ−ラの構成部品を加圧し、これを
加熱することによって前記未加硫ゴムを加硫し、外型を
径方向に移動すると共に、内型を左右に移動分割してゴ
ムクロ−ラより内外型を離型し、その後加硫ゴムバンド
を一対の突起間より剥離するゴムクロ−ラの成型方法に
かかるものである。SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and its gist is to divide the endless rubber crawler into a plurality of parts in a circumferential direction which defines the outer peripheral surface of the endless rubber crawler. In a method of molding a rubber crawler for vulcanizing an unvulcanized rubber member between an outer mold and an inner mold that defines an inner peripheral surface of a rubber crawler, a ring-shaped depression in which a pair of projections of a core metal fits in a central portion. The inner unvulcanized rubber sheet constituting the inner peripheral side of the rubber crawler is wound around the outer periphery of the inner die that can be divided into right and left parts in the width direction of the rubber crawler. A vulcanized rubber band having a pair of dents formed on the left and right is wound around the center, and a projection of a cored bar having a pair of projections is fitted into the depression of the vulcanized rubber band. -Spirally wound around the outer periphery of the rubber crawler. Periphery unvulcanized Gomushi - wrapped bets,
An outer die which is divided in the circumferential direction and is movable in the radial direction is disposed outside the rubber crawler component, and the outer die is radially contracted and pressurized to press the rubber crawler component. By heating this, the unvulcanized rubber is vulcanized, the outer mold is moved in the radial direction, the inner mold is moved right and left to separate the inner and outer molds from the rubber crawler, and then the vulcanized rubber is released. The present invention relates to a method of molding a rubber crawler for separating a band from between a pair of projections.
【0009】[0009]
【発明の実施の形態】既に提案したゴムクロ−ラの成形
方法において、内型が左右に分割できるということはゴ
ムクロ−ラの構造上内型側に一つの突起のみを有するた
めであり、この突起を中心として左右に内型が分割でき
るようにされたものである。しかるに、ゴムクロ−ラの
内周に一対の突起を備えた構造のゴムクロ−ラにあって
は、ゴムクロ−ラの突起が一対をもって内型側に突出す
る形状であるため、内型にこの突起を嵌め込む窪みを形
成しなくてはならず、このため、ゴムクロ−ラの幅方向
に分割することはできないものであった。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the rubber crawler molding method already proposed, the fact that the inner mold can be divided into left and right means that the rubber crawler has only one protrusion on the inner mold side due to its structure. The inner mold can be divided right and left around the center. However, in a rubber crawler having a structure in which a pair of protrusions are provided on the inner periphery of the rubber crawler, the protrusions of the rubber crawler have a pair of shapes protruding toward the inner mold. A recess to be fitted had to be formed, so that it could not be divided in the width direction of the rubber crawler.
【0010】しかるに、本発明においては、この芯金の
一対の突起間に加硫ゴムバンドを挟み込んで一対の突起
を一旦見掛け上一つの突起としてしまい、こうすること
によって内型を左右に分割可能としたものであって、ゴ
ムクロ−ラを加硫成形後、この一対の突起間に嵌め込ま
れた加硫ゴムバンドを剥離してしまうものである。However, in the present invention, the vulcanized rubber band is sandwiched between the pair of projections of the core bar, and the pair of projections temporarily become one projection, so that the inner mold can be divided into right and left. After vulcanization molding of a rubber crawler, the vulcanized rubber band fitted between the pair of projections is peeled off.
【0011】一般に、加硫ゴムに更に高い熱をかけるこ
とはゴムが脆くなることが知られていることから、更に
は加硫ゴムと接触物間は加熱しても接着剤を用いなけれ
ば通常は接着することはないことから、一対の突起間よ
り比較的容易に加硫ゴムバンドが剥離できるものであ
り、ここに一対の突起を備えたゴムクロ−ラが得られる
こととなったものである。In general, it is known that applying higher heat to a vulcanized rubber makes the rubber brittle. Therefore, even if the vulcanized rubber is heated without using an adhesive even if the contact material is heated. Does not adhere, so that the vulcanized rubber band can be peeled off relatively easily from between the pair of projections, and a rubber crawler having a pair of projections can be obtained here. .
【0012】[0012]
【実施例】以下、本発明のゴムクロ−ラの成型方法の実
施の形態を図面に基づいて説明する。図1〜図3は本発
明のゴムクロ−ラ成型方法の第1実施の形態を示す図
で、図1は加硫工程を特に外型の動きで示す概略側断面
図、図2はその概略正面図、図3はゴムクロ−ラ構成部
品の断面図である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the method for molding a rubber crawler according to the present invention will be described below with reference to the drawings. 1 to 3 are views showing a first embodiment of a rubber crawler molding method according to the present invention. FIG. 1 is a schematic side sectional view showing a vulcanizing step by movement of an outer mold, and FIG. 2 is a schematic front view thereof. FIG. 3 is a cross-sectional view of the rubber crawler component.
【0013】加硫成型されるゴムクロ−ラ1の接地面の
トレッドパタ−ン等を画定する外型11は、縮径可能な
内枠12の内周側に設置されており、円周方向に分割さ
れた複数の部片11A〜11Hから構成され、前記内枠
12はその外周のテ−パ−状の傾斜面13を介して外枠
14の内周傾斜面15に対して幅方向および径方向に移
動自在に嵌合される。これらの外型11、内外枠12、
14は全て正面視で無端状に形成され、好ましくは円形
であるが、楕円等の適宜の形状が採用されてもよい。An outer mold 11 for defining a tread pattern or the like of a ground surface of the rubber crawler 1 to be vulcanized and molded is provided on the inner peripheral side of an inner frame 12 capable of reducing the diameter, and is divided in a circumferential direction. The inner frame 12 is formed in a width direction and a radial direction with respect to an inner peripheral inclined surface 15 of an outer frame 14 through a tapered inclined surface 13 on an outer periphery thereof. Movably fitted to These outer mold 11, inner and outer frames 12,
14 are all formed in an endless shape in a front view, and are preferably circular, but an appropriate shape such as an ellipse may be adopted.
【0014】一方、トラックロ−ラ等と係合して外れ防
止機能を発揮する一対の突起を備えたゴムクロ−ラの内
周側を画定する内型16も、前記外型11と対向して無
端状に形成されると共に、幅方向の中央位置において芯
金の一対の突起が納まる輪状の窪み16Cを備え、この
窪み16Cの中央をもって幅方向に2分割(16A、1
6B)されている。On the other hand, an inner mold 16 which defines an inner peripheral side of a rubber roller having a pair of projections which engage with a track roller or the like to exhibit a detachment prevention function is also opposed to the outer mold 11. It is formed endless and has a ring-shaped recess 16C in which a pair of projections of the cored bar are accommodated at the center position in the width direction, and the center of the recess 16C is divided into two in the width direction (16A, 1A).
6B).
【0015】図1にあって、傾斜面13を介して内枠1
2の外周に配置される外枠14を左側に近接押圧するこ
とによって、内枠12と共に外型11の分割された各部
片11A〜11Hは幅方向の移動に伴って縮径し、内型
16の外周に載置されたゴムクロ−ラ構成部品を均一か
つ確実に加圧する。In FIG. 1, the inner frame 1
By pressing the outer frame 14 disposed on the outer circumference of the outer mold 2 to the left side, the divided pieces 11A to 11H of the outer mold 11 together with the inner frame 12 are reduced in diameter in accordance with the movement in the width direction, and the inner mold 16 is moved. The rubber crawler components placed on the outer periphery of the cradle are pressed uniformly and reliably.
【0016】さて、外型11が未装着の状態にて、内型
16の外周面にゴムクロ−ラ1の構成部品がセットされ
ることとなるが、内周側となる内周未加硫ゴムシ−ト1
Aが幅方向の左右に分割されて巻き付けられる。そし
て、中央部の窪み16C内に加硫ゴムバンド2がこれま
た巻き付けられるものであって、この加硫ゴムバンド2
には芯金の一対の突起が嵌り合う一対の窪み2Aが備え
られている。次いで、一対の突起3Aを備えた芯金3を
前記窪み2A内に突起3Aを嵌め合わせてセットするこ
ととなる。その後かかる芯金3を取り囲んでメインコ−
ド4が好ましくはスパイラル状に巻き付けられ、更に、
接地部となる外周未加硫ゴムシ−ト1B、側部となるサ
イド未加硫ゴムシ−ト1C等の必要部材が巻き付けら
れ、外型11の縮径加圧、加熱により各未加硫ゴムが加
硫されることとなる。尚、4aはバイアスコ−ドであ
る。When the outer die 11 is not mounted, the components of the rubber roller 1 are set on the outer peripheral surface of the inner die 16, but the inner peripheral unvulcanized rubber seal on the inner peripheral side is set. -G1
A is divided and wound right and left in the width direction. The vulcanized rubber band 2 is also wound around the central recess 16C.
Is provided with a pair of depressions 2A into which a pair of protrusions of the cored bar are fitted. Next, the core 3 having the pair of projections 3A is set by fitting the projections 3A into the recesses 2A. Then, surround the core bar 3 and
Is preferably wound spirally, and
Necessary members such as an outer unvulcanized rubber sheet 1B serving as a grounding portion and a side unvulcanized rubber sheet 1C serving as a side portion are wound. It will be vulcanized. 4a is a bias code.
【0017】次いで、外枠14に対して内枠12を幅方
向に移動させることで外型11を設置した内枠12が径
方向に拡開し、外型11をゴムクロ−ラ1の外周面から
離型させることができる。その後、内側に内型16の左
右いずれか一方、例えば右側の内型16Bを介在させた
状態にてゴムクロ−ラ1の一方(右側)の外周面を把持
して他方(左側)の内型16Aを幅方向に離型させる。
同様に、僅かに幅方向に離型させた状態の他方(左側)
の内型16Aを介在させた状態でゴムクロ−ラ1の他方
(左側)の外周面を把持して前記一方(右側)の内型1
6Bを離型させる。Next, by moving the inner frame 12 in the width direction with respect to the outer frame 14, the inner frame 12 on which the outer mold 11 is installed expands in the radial direction, and the outer mold 11 is moved to the outer peripheral surface of the rubber roller 1. From the mold. Thereafter, the outer peripheral surface of one (right side) of the rubber crawler 1 is gripped with one of the right and left inner dies 16B, for example, the right inner die 16B interposed therebetween, to hold the other (left) inner die 16A. Is released in the width direction.
Similarly, the other side (left side) slightly released in the width direction
With the inner mold 16A interposed therebetween, the outer peripheral surface of the other (left) side of the rubber crawler 1 is gripped and the one (right) inner mold 1 is held.
Release 6B.
【0018】そして、最後にゴムクロ−ラ1の内周より
突出している芯金3の突起3A間に挟まったままである
加硫ゴムバンド2をこの突起3A間より引っ張り出して
剥離し、突起3Aを露呈させて成型が終了するものであ
る。Finally, the vulcanized rubber band 2, which is still sandwiched between the projections 3A of the metal core 3, which protrudes from the inner periphery of the rubber crawler 1, is pulled out from between the projections 3A and peeled off. It is exposed and the molding is completed.
【0019】図4は、本発明のクロ−ラ−成型方法の第
2実施例の形態を示すもので、本実施の形態では、外型
11の外周に直接に外枠14を配したものである。本実
施の形態のものは、外型11における各分割部片11A
〜11Hの幅方向の両端面の外周に傾斜面28、28を
設けると共に、これらの各分割部片11A〜11Hの外
周側に外枠14A及び14Bを左右一対配置したもので
ある。これら外枠14A、14Bの各内周には前記外型
11の傾斜面に対応する傾斜面29が形成されており、
これら外枠14A、14Bの幅方向の近接移動によっ
て、前記傾斜面を介して各分割部片11A〜11Hが径
方向に縮径して、内型16A、16Bの外周に載置され
たゴムクロ−ラ構成部品を加圧・加熱して加硫が行われ
る。本実施の形態では、外型11が外枠14により直接
に縮径されるので、枠部品や押え板等の削減が可能とな
る。勿論、最後にゴムクロ−ラ1の内周より突出してい
る芯金3の突起3A間に挟まったままである加硫ゴムバ
ンド2をこの突起3A間より引っ張り出して剥離し、突
起3Aを露呈させて成型が終了することは言うまでもな
い。FIG. 4 shows a second embodiment of the crawler molding method according to the present invention. In this embodiment, an outer frame 14 is arranged directly on the outer periphery of an outer mold 11. is there. In the present embodiment, each divided part 11A in the outer mold 11 is used.
Slope surfaces 28, 28 are provided on the outer periphery of both end surfaces in the width direction of the divided parts 11A to 11H, and a pair of left and right outer frames 14A, 14B are arranged on the outer periphery of each of the divided pieces 11A to 11H. An inclined surface 29 corresponding to the inclined surface of the outer mold 11 is formed on each inner periphery of these outer frames 14A and 14B.
As the outer frames 14A and 14B move close to each other in the width direction, the divided pieces 11A to 11H are reduced in diameter in the radial direction through the inclined surfaces, and the rubber clamps mounted on the outer peripheries of the inner dies 16A and 16B. The vulcanization is performed by pressing and heating the rubber components. In the present embodiment, since the outer die 11 is directly reduced in diameter by the outer frame 14, it is possible to reduce the number of frame components, press plates, and the like. Of course, finally, the vulcanized rubber band 2, which is still sandwiched between the projections 3A of the metal core 3 projecting from the inner periphery of the rubber crawler 1, is pulled out from between the projections 3A and peeled off to expose the projections 3A. It goes without saying that the molding is completed.
【0020】[0020]
【発明の効果】以上、本発明によれば、一対の突起を備
えた芯金を用いたゴムクロ−ラの成型にあって、この突
起を予め加硫ゴムバンドにて挟み込んで見かけ上一つの
突起となし、かかる構成とした芯金及び未加硫ゴムシ−
ト更にはメインコ−ド等を幅方向に分割可能な内型の外
周上にてゴムクロ−ラ構成部品を成型した後、該ゴムク
ロ−ラ構成部品の外側に円周方向に分割されて径方向に
摺動可能な外型を配置し、該外型を径方向に縮径加圧す
ることにより前記ゴムクロ−ラ構成部品を加硫するよう
に構成したもので、得られたゴムクロ−ラの突起間より
容易に加硫ゴムバンドを外すことが可能となったもので
ある。As described above, according to the present invention, in the molding of a rubber crawler using a metal core having a pair of projections, the projections are sandwiched in advance by a vulcanized rubber band and apparently one projection is formed. And a core metal and an unvulcanized rubber screen having such a configuration.
G. Further, after molding the rubber crawler component on the outer periphery of the inner mold capable of dividing the main code and the like in the width direction, the rubber crawler component is circumferentially divided outside the rubber crawler component and radially divided. A slidable outer mold is arranged, and the outer mold is configured to be vulcanized by radially reducing and pressurizing the outer mold. The vulcanized rubber band can be easily removed.
【0021】このため、一対の突起を備えたゴムクロ−
ラであっても、無端状の外型と内型との間においてゴム
クロ−ラ構成部品を複数の外型によって円周上において
均一かつ確実に加圧することを可能にして、一挙に加硫
成型を行うことができることとなったもので、メインコ
−ドのスパイラル巻き付けと、円周上均質な強度・剛性
特性を備えさせることを可能にしたもので、走行時の振
動の低減をもたらし、高速安定性と寿命が向上したゴム
クロ−ラを提供できたものである。For this reason, a rubber clock having a pair of projections is provided.
The rubber crawler component can be uniformly and reliably pressed around the circumference by a plurality of outer molds between the endless outer mold and inner mold even if the rubber mold is vulcanized. The main code can be wound spirally, and the strength and rigidity characteristics can be uniform around the circumference. This provides a rubber crawler having improved properties and life.
【図1】図1は本発明の成型方法の特に外型の動きで示
す概略側断面図である。FIG. 1 is a schematic side sectional view of a molding method of the present invention, particularly showing movement of an outer mold.
【図2】図2は図1の概略正面図である。FIG. 2 is a schematic front view of FIG.
【図3】図3は本発明の成型方法におけるゴムクロ−ラ
構成部品の断面図である。FIG. 3 is a sectional view of a rubber crawler component in the molding method of the present invention.
【図4】図4は本発明のクロ−ラ−成型方法の別例を示
す概略側断面図である。FIG. 4 is a schematic side sectional view showing another example of the crawler molding method of the present invention.
【図5】図5は従来のゴムクロ−ラの成型方法を示す概
略断面図である。FIG. 5 is a schematic sectional view showing a conventional method of molding a rubber crawler.
1‥ゴムクロ−ラ、 1A‥内周未加硫ゴムシ−ト、 1B‥外周未加硫ゴムシ−ト、 1C‥サイド未加硫ゴムシ−ト、 2‥加硫ゴムバンド、 2A‥加硫ゴムバンドの窪み、 3‥芯金、 3A‥芯金の突起、 4‥メインコ−ド、 11‥外型、 11A〜11H‥外型片、 16‥内型、 16A、16B‥分割内型、 16C‥内型中央の輪状窪み。 1 rubber unrolled rubber sheet, 1A uncured rubber sheet on inner circumference, 1B uncured rubber sheet on outer circumference, 1C uncured rubber sheet on side, 2 cured rubber band, 2A cured rubber band Recess, 3mm core bar, 3A core bar projection, 4 main cord, 11mm outer die, 11A-11H outer die piece, 16mm inner die, 16A, 16B split inner die, 16C inner A ring-shaped depression in the center of the mold.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 FI テーマコート゛(参考) // B29K 21:00 105:24 B29L 29:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification FI FI Theme Court ゛ (Reference) // B29K 21:00 105: 24 B29L 29:00
Claims (1)
円周方向に複数に分割された外型とゴムクロ−ラの内周
面を画定する内型との間で未加硫ゴム部材を加硫するゴ
ムクロ−ラの成型方法において、中央部に芯金の一対の
突起が納まる輪状窪みを備え、ゴムクロ−ラの幅方向に
左右に分割可能な内型の外周上にてゴムクロ−ラの内周
側を構成する内周未加硫ゴムシ−トを幅方向左右に巻き
付け、内型の中央部に左右に一対の窪みを形成した加硫
ゴムバンドを巻き付け、一対の突起を備えた芯金の突起
を前記加硫ゴムバンドの窪み内に嵌め合わせてなり、こ
の芯金を囲んでメインコ−ドをスパイラル状に巻き付
け、更にゴムクロ−ラの外周側を構成する外周未加硫ゴ
ムシ−トを巻き付け、該ゴムクロ−ラ構成部品の外側に
円周方向に分割され径方向に移動可能な外型を配置し、
該外型を径方向に縮径加圧して前記ゴムクロ−ラの構成
部品を加圧し、これを加熱することによって前記未加硫
ゴムを加硫し、外型を径方向に移動すると共に、内型を
左右に移動分割してゴムクロ−ラより内外型を離型し、
その後加硫ゴムバンドを一対の突起間より剥離すること
を特徴とするゴムクロ−ラの成型方法。1. An unvulcanized rubber member is formed between an outer mold divided into a plurality of parts in a circumferential direction defining an outer peripheral surface of an endless rubber crawler and an inner mold defining an inner peripheral surface of the rubber crawler. In a method of molding a rubber crawler to be vulcanized, the center of the rubber crawler is provided with a ring-shaped recess in which a pair of protrusions of a metal core are accommodated, and the rubber crawler is formed on the outer periphery of an inner mold that can be divided into right and left in the width direction of the rubber crawler. An inner unvulcanized rubber sheet constituting the inner peripheral side is wound left and right in the width direction, a vulcanized rubber band having a pair of left and right recesses formed around the center of the inner mold, and a core bar having a pair of projections The main code is spirally wound around the cored bar, and the outer unvulcanized rubber sheet constituting the outer peripheral side of the rubber crawler is formed by fitting the projections into the recesses of the vulcanized rubber band. Wrapped around the rubber crawler component, and Place the outer mold that can move in the direction,
The outer mold is radially reduced and pressurized to pressurize the components of the rubber crawler, which is heated to vulcanize the unvulcanized rubber. Move the mold to the left and right and separate the inner and outer molds from the rubber crawler,
Thereafter, the vulcanized rubber band is peeled off from between the pair of projections.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25585298A JP2000085028A (en) | 1998-09-10 | 1998-09-10 | Method for molding rubber crawler |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP25585298A JP2000085028A (en) | 1998-09-10 | 1998-09-10 | Method for molding rubber crawler |
Publications (1)
Publication Number | Publication Date |
---|---|
JP2000085028A true JP2000085028A (en) | 2000-03-28 |
Family
ID=17284493
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP25585298A Pending JP2000085028A (en) | 1998-09-10 | 1998-09-10 | Method for molding rubber crawler |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2000085028A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002127267A (en) * | 2000-10-24 | 2002-05-08 | Bridgestone Corp | Method for producing crawler |
CN113246348A (en) * | 2021-06-29 | 2021-08-13 | 哈尔滨利民橡胶有限公司 | BCS piston compression molding rubber mold |
-
1998
- 1998-09-10 JP JP25585298A patent/JP2000085028A/en active Pending
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002127267A (en) * | 2000-10-24 | 2002-05-08 | Bridgestone Corp | Method for producing crawler |
JP4571293B2 (en) * | 2000-10-24 | 2010-10-27 | 株式会社ブリヂストン | Crawler manufacturing method |
CN113246348A (en) * | 2021-06-29 | 2021-08-13 | 哈尔滨利民橡胶有限公司 | BCS piston compression molding rubber mold |
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