JPS586682Y2 - Equipment for removing unnecessary parts of rubber molded products - Google Patents

Description

【考案の詳細な説明】 本考案は無限軌道として農耕機械等に用いる合成ゴム等
から成る農耕用ゴムタイヤの如きゴム成形品の成形加工
時に生じるパリ等の不用部を除去する装置に関するもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for removing unnecessary parts such as burrs generated during the molding process of rubber molded products such as agricultural rubber tires made of synthetic rubber used as endless tracks in agricultural machinery and the like.

このような成形品の一例として第２図に示すようなゴム
タイヤ１は適宜の成形装置にて帯状に成形されて連続し
た状態で送り出されてくる。As an example of such a molded product, a rubber tire 1 as shown in FIG. 2 is molded into a belt shape using an appropriate molding device and then sent out in a continuous state.

このように連続状に送り出されてくるゴムタイヤ１は一
定の長さに切断し、その両端を接続して無限軌道とし、
農耕機の前後両側のスプロケットに折返えし部を掛合さ
せて使用するので、ゴムタイヤ１の中心にはスプロケッ
トの歯が掛合する掛合孔を一定の間隔で形成する必要が
ある。The rubber tires 1 that are continuously fed out in this way are cut into a certain length, and both ends are connected to form an endless track.
Since the folded parts are used to engage the front and rear sprockets of the agricultural machine, it is necessary to form engagement holes at regular intervals in the center of the rubber tire 1 in which the teeth of the sprockets engage.

しかし、成形の都合上、掛合孔を作れないので掛合孔の
部分に薄肉の部分が不用部として形成されて出てくるの
である。However, due to the molding process, it is not possible to make a hooking hole, so a thin part is formed as an unnecessary part at the hooking hole.

この不用部は成形後無端状に接続する前に取除かねばな
らないが、材料が軟質弾性体であるため金属板を打ち抜
くプレス機の如きもので除去することができない。This unnecessary portion must be removed after forming and before connecting it into an endless shape, but since the material is a soft elastic body, it cannot be removed using a press machine that punches out a metal plate.

このため従来では電熱等により加熱した焼鏝を用いて手
作業で不用部を焼き切っていたのできわめて手数がかか
り製造能率低下の原因となっていた。For this reason, in the past, unnecessary parts were burnt off manually using a burning iron heated by electric heat or the like, which was extremely time-consuming and caused a decrease in manufacturing efficiency.

本考案は上記のような問題に鑑みて、低温液化ガスによ
る極低温を利用して不用部を冷却して弾性を失わせ、脆
性となった状態において金型で打ち抜くことにより能率
的に不用部を除去する装置を提案するものであるが、そ
の詳細を添附図面について説明すれば次の通りである。In view of the above-mentioned problems, the present invention utilizes the extremely low temperature of low-temperature liquefied gas to cool the unnecessary parts so that they lose their elasticity, and then punches them in a brittle state with a mold to efficiently remove the unnecessary parts. This paper proposes an apparatus for removing .

第１図及び第２図に示すゴムタイヤ１において、２が不
用部として除去しなければならない部分である。In the rubber tire 1 shown in FIGS. 1 and 2, 2 is a portion that must be removed as an unnecessary portion.

又、この不用部２はゴムタイヤ１の中央部に一定の間隔
で長手方向に列設された薄肉の部分でその周囲部は厚肉
となっている。The unnecessary portions 2 are thin-walled portions arranged longitudinally at regular intervals in the center of the rubber tire 1, and the surrounding portions are thick-walled.

第１図において、３は金型であり、銅、銅合金、アルミ
ニウム、アルミニウム合金の如き熱伝導率の大きい金属
材料を用いている。In FIG. 1, numeral 3 denotes a mold, which is made of a metal material with high thermal conductivity such as copper, copper alloy, aluminum, or aluminum alloy.

この金型３の上にはカバー４を固定して該金型３とカバ
ー４とで密閉した箱を形威し、カバー４の外側には断熱
材層５を設け、カバー４上には油圧シリンダ等で昇降さ
れる適宜の昇降部材６を取付ける。A cover 4 is fixed on top of this mold 3, and the mold 3 and cover 4 form a sealed box.A heat insulating material layer 5 is provided on the outside of the cover 4, and a hydraulic An appropriate elevating member 6 that is elevated by a cylinder or the like is attached.

金型３はこの昇降部材６と一体に上記ゴムタイヤ１の適
宜な支持台（図示されていないが第１図においてゴムタ
イヤ１の下面に位置する）に向かって移動するが、その
動作は、ゴムタイヤ１の不用部に一定時間接触させたの
ちさらに支持台に向かって移動するようになっている。The mold 3 moves together with the elevating member 6 toward a suitable support base for the rubber tire 1 (not shown, but located on the bottom surface of the rubber tire 1 in FIG. 1). After being in contact with the unnecessary part of the body for a certain period of time, it is further moved towards the support stand.

前記一定時間は、後述のごとく不用部２が冷却されて硬
化し、著しく脆弱となるに必要な長さに適宜に設定する
。The predetermined period of time is appropriately set to a length necessary for the unnecessary portion 2 to cool and harden and become extremely brittle as described later.

該カバー４の一側壁外側に套管７を固定してその内部を
カバー４内に連通させ、該套管７内に低温液化ガス注入
管８を適宜の間隙を存して挿入し、その内端の下向排出
口９を金型３内に向ける。A mantle tube 7 is fixed to the outside of one side wall of the cover 4, and the inside thereof is communicated with the inside of the cover 4. A low temperature liquefied gas injection pipe 8 is inserted into the mantle tube 7 with an appropriate gap, and the inside thereof is The downward discharge port 9 at the end is directed into the mold 3.

又該套管７の外端近くの下側には予冷用ガスの噴射口１
０を設ける。Further, there is a pre-cooling gas injection port 1 on the lower side near the outer end of the mantle tube 7.
Set 0.

１１は液体窒素等の低温液化ガスの貯蔵容器で、１２は
圧力計、１３は容器１１と注入管８を連通させる連通管
、１４は電磁弁、１５は金型内部の温度検出器でこの検
出器１５により電磁弁１４を制御し、金型３を極低温に
保持せしめる。11 is a storage container for low-temperature liquefied gas such as liquid nitrogen, 12 is a pressure gauge, 13 is a communication pipe that communicates the container 11 and injection pipe 8, 14 is a solenoid valve, and 15 is a temperature detector inside the mold for this detection. The solenoid valve 14 is controlled by the device 15 to maintain the mold 3 at an extremely low temperature.

本考案の装置は上記のように構成されており、今、第１
図のように停止中のタイヤ１の不用部２内に金型３が嵌
入して該不用部２を−５０〜−７０℃程度に冷却したの
ち金型３が更に一段下降すると、冷却されて硬化し、且
つ著しく脆弱となった不用部２は簡単に破壊されて落下
し、そのあとにスプロケットの歯と掛合する掛合孔が形
成される。The device of the present invention is configured as described above, and now the first
As shown in the figure, the mold 3 fits into the unnecessary part 2 of the stopped tire 1 and cools the unused part 2 to about -50 to -70°C. When the mold 3 descends one step further, it is cooled. The hardened and extremely brittle unnecessary portion 2 is easily broken and falls, after which an engaging hole is formed to engage with the teeth of the sprocket.

この間金型３内に注入される低温液化ガス１６がら蒸発
したガスは、その顕熱を有効に利用するために套管７内
を経て噴射口１０から噴出して次の位置にある不用部２
を予冷している。During this time, the gas evaporated from the low-temperature liquefied gas 16 injected into the mold 3 passes through the inside of the mantle 7 and is ejected from the injection port 10 to make effective use of its sensible heat.
is pre-cooled.

上記のように金型３が不用部を除去したのち昇降部材６
の作用でカバー４と共に金型３が上昇すると、タイヤ１
が矢印方向に１ピツチ移動し、予冷された不用部２が金
型３の直下にきたときタイヤ１は停止し、次いで金型３
が一段下降して第１図の状態となる。After the mold 3 removes unnecessary parts as described above, the lifting member 6
When the mold 3 rises together with the cover 4 due to the action of
moves one pitch in the direction of the arrow, and when the pre-cooled unnecessary part 2 comes directly under the mold 3, the tire 1 stops, and then the mold 3
is lowered one step to the state shown in FIG.

上記のような作用によりタイヤ１が矢印方向にｌピッチ
移動して連続的に不用部２が除去されていくのである。Due to the above-described action, the tire 1 moves l pitch in the direction of the arrow, and the unnecessary portion 2 is continuously removed.

又、実施例は金型３が昇降部材６で自動的に上下する場
合を示したが手動操作で金型を取り扱えるようにもでき
る。Furthermore, although the embodiment has shown a case in which the mold 3 is automatically moved up and down by the lifting member 6, it is also possible to handle the mold by manual operation.

以上のように、この考案の不用部除去装置にすると、低
温液化ガスにより極く低温に冷却された金型をタイヤの
如きゴム成形品の不用部に当てがって極く低温に冷却し
たのち金型を更に下降させて脆弱化した不用部を破壊除
去するようにしたので、常温では除去し難い軟質弾性材
料でも容易に除去できる。As described above, when the unnecessary part removal device of this invention is used, a mold that has been cooled to an extremely low temperature by low-temperature liquefied gas is applied to the unnecessary part of a rubber molded product such as a tire, and then the mold is cooled to an extremely low temperature. Since the mold is further lowered to destroy and remove the weakened unnecessary parts, even soft elastic materials that are difficult to remove at room temperature can be easily removed.

また、不用部は薄肉で急速に冷却できるが、その周囲部
は著しく肉厚が大であり、熱容量が大であるから不用部
のみの局所冷却が容易に行なわれ、所望の部分のみを脆
弱化して除去できるものである。In addition, the unnecessary parts are thin and can be cooled quickly, but the surrounding parts are significantly thicker and have a large heat capacity, so local cooling of only the unnecessary parts can be easily performed, and only the desired parts can be weakened. It can be removed by

さらに、一つの金型の作用により不用部の冷却及び打ち
抜きを行ない、かつ金型を不用部の片側に押し付けるだ
けなので、構造が簡単であり、連続的な加工に最適であ
る効果もある。Furthermore, the unnecessary part is cooled and punched by the action of one mold, and the mold is simply pressed against one side of the unnecessary part, so the structure is simple and it has the advantage of being optimal for continuous processing.

なお、実施例では農耕用タイヤの不用部除去について説
明したが他の同様の材料がら成る各種彫物の不用部除去
装置として採用でき、上記効果を得ることは勿論である
。Although the embodiment describes the removal of unnecessary parts from agricultural tires, it can of course be used as an apparatus for removing unnecessary parts from various carvings made of other similar materials, and the above-mentioned effects can of course be obtained.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は本考案の不用部除去装置の縦断側面図、第２図
はゴム成形物の一例としてのゴムタイヤの一部切欠斜視
図である。 １・・・・・・ゴムタイヤ、２・・・・・・不用部、３
・・・・・・金型、１１・・・・・・低温液化ガス貯蔵
容器。FIG. 1 is a longitudinal sectional side view of the unnecessary part removing device of the present invention, and FIG. 2 is a partially cutaway perspective view of a rubber tire as an example of a rubber molded product. 1...Rubber tire, 2...Unused part, 3
...Mold, 11...Low temperature liquefied gas storage container.

Claims (1)

【実用新案登録請求の範囲】[Scope of utility model registration request] 任意形成に成形されたゴム成形品の支持台と、低温液化
ガスにより極低温に冷却され前記支持台に向かって移動
可能な金型とを備え、この金型は、上記ゴム成形品の不
用部に一定時間接触させたのちさらに前記支持台に向か
って移動されて該不用部を打ち抜くようになっているこ
とを特徴とするゴム成形品の不用部除去装置。It is equipped with a support stand for a rubber molded product formed into an arbitrary shape, and a mold that is cooled to an extremely low temperature by low-temperature liquefied gas and is movable toward the support stand, and this mold is used to remove unnecessary parts of the rubber molded product. An apparatus for removing an unnecessary part of a rubber molded article, characterized in that the apparatus is adapted to be in contact with the rubber molded article for a certain period of time, and then further moved toward the support stand to punch out the unnecessary part.