JP2851691B2 - Manufacturing method of vulcanized rubber body - Google Patents
Manufacturing method of vulcanized rubber bodyInfo
- Publication number
- JP2851691B2 JP2851691B2 JP2219694A JP21969490A JP2851691B2 JP 2851691 B2 JP2851691 B2 JP 2851691B2 JP 2219694 A JP2219694 A JP 2219694A JP 21969490 A JP21969490 A JP 21969490A JP 2851691 B2 JP2851691 B2 JP 2851691B2
- Authority
- JP
- Japan
- Prior art keywords
- rubber material
- tube
- vulcanized
- vulcanized rubber
- rubber body
- 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.)
- Expired - Lifetime
Links
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- Moulds For Moulding Plastics Or The Like (AREA)
- Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は加硫ゴム体の製造方法に関し、詳しくは未加
硫ゴム材を金型内に充填し、その未加硫ゴム材を加圧状
態で加硫させることにより加硫ゴム体を製造する方法に
関する。Description: TECHNICAL FIELD The present invention relates to a method for producing a vulcanized rubber body, and more particularly, fills an unvulcanized rubber material in a mold and presses the unvulcanized rubber material. The present invention relates to a method for producing a vulcanized rubber body by vulcanizing in a state.
例えば建築物などの上部構造物を基礎などの下部構造
物の上に水平方向に揺動自在に支持して、上部構造物を
地震から保護する免震支承には種々のタイプのものがあ
り、その一つに周囲拘束型がある。この周囲拘束型免震
支承は、複数の硬質板とゴム状弾性板とを交互に積層し
た積層体の中央に筒形中空部を形成し、この筒形中空部
に柱状の高減衰粘弾性体を挿入・充填した構造のもので
ある。この粘弾性体(1)は加硫ゴム製品であり、第5
図に示すように円柱状の加硫ゴム体(2)の上下面に硬
質材からなる鋼板などの上下フランジ(3)(4)を加
硫接着により一体化したものである。For example, there are various types of seismic isolation bearings that support an upper structure such as a building horizontally on a lower structure such as a base so as to swing freely and protect the upper structure from an earthquake. One of them is the peripheral constraint type. This seismic isolation type bearing has a cylindrical hollow portion formed in the center of a laminated body in which a plurality of hard plates and rubber-like elastic plates are alternately laminated, and a columnar high-damping viscoelastic material is formed in the cylindrical hollow portion. Is inserted and filled. This viscoelastic body (1) is a vulcanized rubber product,
As shown in the figure, upper and lower flanges (3) and (4) such as a steel plate made of a hard material are integrated on the upper and lower surfaces of a cylindrical vulcanized rubber body (2) by vulcanization bonding.
この加硫ゴム体(2)からなる粘弾性体(1)は、第
6図に示す金型(5)を用いて以下のようにして製造さ
れる。The viscoelastic body (1) made of the vulcanized rubber body (2) is manufactured as follows using a mold (5) shown in FIG.
金型(5)は、底板部(6)、円筒部(7)及び天板
部(8)を組合わせ構成される。円筒部(7)は加硫後
の離型を容易にするため縦割りにより二以上に分割可能
なものである。また、天板部(8)はその下面に熱膨張
による余剰ゴム材を外部へ流出させる凹溝(9)(9)
を形成したものである。The mold (5) is configured by combining a bottom plate (6), a cylindrical portion (7), and a top plate (8). The cylindrical portion (7) can be divided into two or more by vertical division to facilitate release after vulcanization. The top plate (8) has concave grooves (9) (9) on its lower surface for allowing excess rubber material to flow out due to thermal expansion.
Is formed.
まず、金型(5)の底板部(6)と円筒部(7)とを
組合せてその内部空間に下フランジ(4)、未加硫ゴム
材(2′)及び上フランジ(3)を順次挿入して積層配
置するか、或いは予め上下フランジ(3)(4)を配置
した後、未加硫ゴム材(2′)を図示しない注入ポット
等を用いて注入した上で、天板部(8)を円筒部(7)
に装着する。この時、上記上下フランジ(3)(4)及
び未加硫ゴム材(2′)の積層体の体積は金型(5)の
内部空間の容積よりも若干大きく設定され、上記積層体
は天板部(8)による押え込みで加圧状態となる。この
状態で金型(5)を加硫用の炉内で加熱する。この加熱
により未加硫ゴム材(2′)は加硫されて加硫ゴム体
(2)となり、その上下面に予め接着剤が塗布された上
下フランジ(3)(4)が一体的に接着された粘弾性体
(1)が製作される。上記加硫時、未加硫ゴム材
(2′)は熱膨張し、この熱膨張による余剰ゴム材(1
0)は、上フランジ(3)に穿設された小孔(11)(1
1)を介してこれと連通する天板部(8)の凹溝(9)
(9)を通して外部へ流出させている。First, a bottom plate (6) and a cylindrical portion (7) of a mold (5) are combined and a lower flange (4), an unvulcanized rubber material (2 ') and an upper flange (3) are sequentially arranged in the internal space. After inserting and laminating, or after arranging the upper and lower flanges (3) and (4) in advance, the unvulcanized rubber material (2 ') is injected using an injection pot (not shown), and then the top plate portion ( 8) cylindrical part (7)
Attach to At this time, the volume of the laminate of the upper and lower flanges (3) and (4) and the unvulcanized rubber material (2 ') is set to be slightly larger than the volume of the internal space of the mold (5). Pressing by the plate portion (8) results in a pressurized state. In this state, the mold (5) is heated in a vulcanizing furnace. By this heating, the unvulcanized rubber material (2 ') is vulcanized into a vulcanized rubber body (2), and upper and lower flanges (3) and (4) to which adhesive has been applied in advance are integrally bonded on the upper and lower surfaces. The manufactured viscoelastic body (1) is manufactured. During the vulcanization, the unvulcanized rubber material (2 ') thermally expands, and the excess rubber material (1
0) is a small hole (11) (1) drilled in the upper flange (3).
A recess (9) in the top plate (8) communicating with this via 1)
It is discharged outside through (9).
ところで、従来の加硫ゴム体(2)の製造方法では、
熱膨張による余剰ゴム材(10)を加硫中に未加硫ゴム材
(2′)の表面から逃がしている。具体的には、上記未
加硫ゴム材(2′)の上フランジ(3)と衝合する上面
で上フランジ(3)の小孔(11)(11)と対応する部位
から余剰ゴム材(10)を外部に向けて逃がしていた。こ
こで、未加硫ゴム材(2′)は余剰(5)の円筒部
(7)及び上下フランジ(3)(4)と接触する外側か
ら加熱され、加硫が進行するので、上述したように加硫
中に余剰ゴム材(10)を未加硫ゴム材(2′)の表面か
ら逃がそうとすると、余剰ゴム材(10)が流出しようと
する部位近傍ではゴムが加硫しながら流動するため、最
終的に加硫ゴム体(2)の表面部位に割れ等の欠損が発
生する。また、加硫ゴム体(2)が厚肉製品の場合に
は、未加硫ゴム材(2′)の外側から加硫が進行するた
め、その内部中央に空気が抜け切らないで気泡が残存し
易くなる。このように加硫ゴム体(2)の表面に欠損が
あったり、その内部に気泡が残存していると、加硫ゴム
体(2)の品質及び歩留まりが大幅に低下し、粘弾性体
(1)として使用することが困難となる。By the way, in the conventional manufacturing method of the vulcanized rubber body (2),
The surplus rubber material (10) due to thermal expansion is released from the surface of the unvulcanized rubber material (2 ') during vulcanization. Specifically, the excess rubber material (from the portion corresponding to the small holes (11) and (11) of the upper flange (3) on the upper surface which abuts on the upper flange (3) of the unvulcanized rubber material (2 ')). 10) had escaped to the outside. Here, the unvulcanized rubber material (2 ') is heated from the outside in contact with the surplus (5) of the cylindrical portion (7) and the upper and lower flanges (3) and (4), and vulcanization proceeds. If the surplus rubber material (10) tries to escape from the surface of the unvulcanized rubber material (2 ') during vulcanization, the rubber is vulcanized near the part where the surplus rubber material (10) is likely to flow out. Due to the flow, the surface portion of the vulcanized rubber body (2) eventually has cracks or other defects. When the vulcanized rubber body (2) is a thick-walled product, the vulcanization proceeds from the outside of the unvulcanized rubber material (2 '), so that air does not escape completely and air bubbles remain at the center of the inside. Easier to do. If the surface of the vulcanized rubber body (2) has a defect or bubbles remain therein, the quality and yield of the vulcanized rubber body (2) are significantly reduced, and the viscoelastic body ( It becomes difficult to use as 1).
そこで、本発明は上記問題点に鑑みて提案されたもの
で、その目的とするところは、簡便な手段により良品質
の加硫ゴム体を製作し得る加硫ゴム体の製造方法を提供
することにある。Therefore, the present invention has been proposed in view of the above problems, and an object of the present invention is to provide a method for producing a vulcanized rubber body capable of producing a high-quality vulcanized rubber body by simple means. It is in.
本発明における上記目的を達成するための技術的手段
は、金型内に未加硫ゴム材を充填し、その未加硫ゴム材
を加圧状態で加硫するに際し、熱膨張による余剰ゴム材
を加硫中に未加硫ゴム材の中央部からチューブにより金
型外部へ流出させるようにしたことである。The technical means for achieving the above object in the present invention is to fill an unvulcanized rubber material in a mold and vulcanize the unvulcanized rubber material in a pressurized state. During the vulcanization, it is caused to flow out of the mold from the center of the unvulcanized rubber material by a tube.
上記未加硫ゴム材に埋設されるチューブは、断熱性を
有する材料からなることが望ましい。The tube embedded in the unvulcanized rubber material is desirably made of a material having heat insulating properties.
また、未加硫ゴム材に挿入されるチューブの外周面
を、その挿入方向に対して傾くテーパ面としてもよい。Further, the outer peripheral surface of the tube inserted into the unvulcanized rubber material may be a tapered surface inclined with respect to the insertion direction.
本発明方法では、未加硫ゴム材の外側から加硫が進行
しても、熱伝達が悪いため加硫するのが遅い中央部か
ら、熱膨張による余剰ゴム材をチューブにより逃がすた
め、上記未加硫ゴム材の表面でゴムが加硫しながら流動
することなく、加硫ゴム体の表面状態は良好となる。In the method of the present invention, even if vulcanization proceeds from the outside of the unvulcanized rubber material, the excess rubber material due to thermal expansion is released from the central portion, which is slow in vulcanization due to poor heat transfer, by a tube. The surface state of the vulcanized rubber body is good without the rubber flowing on the surface of the vulcanized rubber material while vulcanizing.
また、上記チューブを断熱性を有する材料で形成すれ
ば、チューブ内を通過する余剰ゴム材が加熱されにくく
なった流動し易くなり、余剰ゴム材の流出が速やかに行
われて加硫ゴム体の内部中央に気泡が残存することはな
い。In addition, if the tube is formed of a material having heat insulating properties, the surplus rubber material passing through the inside of the tube is less likely to be heated and becomes easier to flow, and the surplus rubber material is quickly spilled out of the vulcanized rubber body. No air bubbles remain in the center of the interior.
更に、上記チューブの外周面をその挿入方向に対して
傾くテーパ面とすれば、加硫後、加硫ゴム体からチュー
ブを抜脱することが容易となる。Furthermore, if the outer peripheral surface of the tube is a tapered surface inclined with respect to the insertion direction, it becomes easy to remove the tube from the vulcanized rubber body after vulcanization.
本発明に係る加硫ゴム体の製造方法の一実施例を第1
図乃至第4図を参照しながら説明する。以下の実施例で
は、周囲拘束型免震支承の一部を構成する粘弾性体の製
造に適用した場合について説明し、第5図及び第6図に
示す粘弾性体及び金型での同一、又は相当部分には同一
参照符号を付して重複説明は省略する。One embodiment of the method for producing a vulcanized rubber body according to the present invention
This will be described with reference to FIGS. In the following embodiment, a case where the present invention is applied to the production of a viscoelastic body which constitutes a part of a seismic isolation bearing with a peripheral constraint will be described, and the same viscoelastic body and mold shown in FIGS. 5 and 6 will be used. Or, the corresponding parts are denoted by the same reference numerals, and redundant description will be omitted.
本発明方法の特徴は、第1図に示すように熱膨張によ
る余剰ゴム材(10)を加硫中に未加硫ゴム材(2′)の
中央部からチューブ(12)(12)により金型外部へ流出
させるようにしたことである。The feature of the method of the present invention is that, as shown in FIG. 1, during the vulcanization of the surplus rubber material (10) due to thermal expansion, gold is applied from the center of the unvulcanized rubber material (2 ') by the tubes (12) and (12). This is to make it flow out of the mold.
以下、具体的に説明する。まず、第2図に示すように
金型(5)の底板部(6)と円筒部(7)により形成さ
れた内部空間に下フランジ(4)、未加硫ゴム材
(2′)及び上フランジ(3)を順次挿入して積層配置
する。或いは、予め上下フランジ(3)(4)を配置し
た上で、図示しない注入ポット等を用いて未加硫ゴム剤
(2′)を注入充填する。そして、余剰ゴム材(10)を
逃がすためのチューブ(12)(12)を上フランジ(3)
に穿設された取付孔(13)(13)に挿入して未加硫ゴム
材(2′)に埋設し、その下端部を未加硫ゴム材
(2′)の中央部に配置する。Hereinafter, a specific description will be given. First, as shown in FIG. 2, a lower flange (4), an unvulcanized rubber material (2 ') and an upper space are formed in an inner space formed by a bottom plate (6) and a cylindrical portion (7) of a mold (5). The flanges (3) are sequentially inserted and stacked. Alternatively, after the upper and lower flanges (3) and (4) are arranged in advance, the unvulcanized rubber agent (2 ') is injected and filled using an injection pot (not shown). Then, attach the tubes (12) and (12) for releasing the surplus rubber material (10) to the upper flange (3).
And is embedded in the unvulcanized rubber material (2 '), and its lower end is arranged at the center of the unvulcanized rubber material (2').
ここで、上記チューブ(12)は、第3図及び第4図に
示すように後述する理由から、例えばテフロン樹脂、セ
ラミック、アスベスト或いはグラスファイバー等の断熱
性を有する材料からなることが好ましく、大径の頭部
(14)と小径の棒状部(15)とを一体成形したものであ
る。このチューブ(12)には、頭部(14)の上端に開口
して棒状部(15)の下端に開口する貫通孔(16)が形成
され、その貫通孔(16)の棒状部下端近傍部位を縮径さ
せる。この貫通孔(16)の縮径部(17)により余剰ゴム
材(10)の流出過剰を規制する。また、上記チューブ
(12)は、その棒状部(15)が上端から下端へ向けて徐
々に縮径するように棒状部(15)の外周面が軸方向に対
して傾くテーパ面(18)とした形状を有する。これによ
り加硫後のチューブ抜脱を容易にする。Here, as shown in FIGS. 3 and 4, the tube (12) is preferably made of a heat-insulating material such as Teflon resin, ceramic, asbestos or glass fiber for the reason described later. The diameter head (14) and the small diameter rod (15) are integrally formed. The tube (12) has a through hole (16) formed at the upper end of the head (14) and opened at the lower end of the rod portion (15), and a portion near the lower end of the rod portion of the through hole (16). To reduce the diameter. Excessive outflow of the surplus rubber material (10) is regulated by the reduced diameter portion (17) of the through hole (16). Further, the tube (12) has a tapered surface (18) in which the outer peripheral surface of the rod portion (15) is inclined with respect to the axial direction so that the rod portion (15) gradually decreases in diameter from the upper end to the lower end. It has a shaped shape. This facilitates removal of the tube after vulcanization.
一方、第2図に示すように上記チューブ(12)が挿通
される上フランジ(3)の取付孔(13)は、チューブ
(12)の頭部(14)が嵌入する大径部(19)とチューブ
(12)の棒状部(15)が嵌挿される小径部(20)とを段
差(21)を介して連通した構造である。この取付孔(1
3)に挿入されたチューブ(12)はその頭部(14)が段
差(21)で係止されることにより位置決め配置される。On the other hand, as shown in FIG. 2, the mounting hole (13) of the upper flange (3) into which the tube (12) is inserted is a large-diameter portion (19) into which the head (14) of the tube (12) fits. And a small-diameter portion (20) into which the rod-shaped portion (15) of the tube (12) is inserted is communicated via a step (21). This mounting hole (1
The tube (12) inserted in (3) is positioned and arranged by its head (14) being locked by a step (21).
上記チューブ(12)の挿着後、天板部(8)を円筒部
(7)に装着し、従来と同様、上下フランジ(3)
(4)及び未加硫ゴム材(2′)の積層体を天板部
(8)による押え込みで加圧状態に設定する。この状態
で金型(5)を加硫用の炉内で加熱し、金型(5)内で
加圧状態にある未加硫ゴム材(2′)を加硫して加硫ゴ
ム体(2)とすると同時に、その上下面に上下フランジ
(3)(4)を一体的に接着して第5図に示す粘弾性体
(1)を製作する。After inserting the tube (12), the top plate (8) is attached to the cylindrical portion (7), and the upper and lower flanges (3)
The laminate of (4) and the unvulcanized rubber material (2 ') is set in a pressurized state by being pressed by the top plate (8). In this state, the mold (5) is heated in a vulcanizing furnace, and the unvulcanized rubber material (2 ') in a pressurized state is vulcanized in the mold (5) to obtain a vulcanized rubber body ( At the same time as 2), upper and lower flanges (3) and (4) are integrally bonded to the upper and lower surfaces to produce the viscoelastic body (1) shown in FIG.
この加硫時、未加硫ゴム材(2′)が熱膨張し、この
熱膨張による余剰ゴム材(10)を加硫中に未加硫ゴム材
(2′)の中央部からチューブ(12)(12)により逃が
す。このように未加硫ゴム材(2′)が金型(5)の円
筒部(7)及び上下フランジ(3)(4)と接触する外
側から加硫が進行しても、熱伝達が悪くて加硫するのが
遅い中央部から熱膨張による余剰ゴム材(10)をチュー
ブ(12)(12)により逃がしているため、未加硫ゴム材
(2′)の表面でゴムが加硫しながら流動することがな
く、最終的に加硫ゴム体(2)の表面で欠損が生じにく
くなる。第1図に示すように上記チューブ(12)(12)
内に流入した余剰ゴム材(10)はその貫通孔(16)(1
6)を通り、天板部(8)の凹溝(9)(9)に流れ込
んで最終的に金型外部へ流出する。この時、上記チュー
ブ(12)(12)が断熱性を有する材料からなるので、チ
ューブ(12)(12)内を通過する余剰ゴム材(10)が加
熱されにくくなって流動し易くなり、余剰ゴム材(10)
の流出が速やかに行われて最終的に加硫ゴム体(2)の
内部中央に気泡が残存することはない。During the vulcanization, the unvulcanized rubber material (2 ') thermally expands, and during the vulcanization of the surplus rubber material (10) due to the thermal expansion, the tube (12') extends from the center of the unvulcanized rubber material (2 '). ) Release by (12). Thus, even if the unvulcanized rubber material (2 ') is vulcanized from the outside where it comes into contact with the cylindrical portion (7) of the mold (5) and the upper and lower flanges (3) and (4), heat transfer is poor. Excess rubber material (10) due to thermal expansion is released from tubes (12) and (12) from the central portion where vulcanization is slow, so that rubber is vulcanized on the surface of the unvulcanized rubber material (2 '). However, it does not flow, and finally, it is difficult for defects to be generated on the surface of the vulcanized rubber body (2). As shown in FIG. 1, the tubes (12) and (12)
The excess rubber material (10) that has flowed into the
After passing through 6), it flows into the concave grooves (9) and (9) of the top plate (8) and finally flows out of the mold. At this time, since the tubes (12) and (12) are made of a material having a heat insulating property, the surplus rubber material (10) passing through the tubes (12) and (12) is less likely to be heated and flows more easily. Rubber material (10)
Of the vulcanized rubber body (2) does not remain in the center of the vulcanized rubber body (2).
この加硫後、天板部(8)を円筒部(7)から取り外
した上で、上フランジ(3)に装着されたチューブ(1
2)(12)を適宜の手段により抜脱する。この時、上記
チューブ(12)(12)の棒状部(15)(15)が上端から
下端へ向けて縮径するようにその外周面がテーパ面(1
8)(18)となっているので、加硫ゴム体(2)からチ
ューブ(12)(12)を容易に抜脱することができる。
尚、上記チューブ(12)(12)の抜脱後、必要であれ
ば、チューブ(12)(12)と同一形状の加硫ゴム体を挿
入することによりチューブ抜脱孔を塞ぐようにしてもよ
い。以上のようにして製作された粘弾性体(1)は金型
(5)から取り外すことにより得られる。After this vulcanization, the top plate (8) was removed from the cylindrical portion (7), and the tube (1) attached to the upper flange (3) was removed.
2) Remove (12) by appropriate means. At this time, the outer peripheral surface of the tube (12) (1) has a tapered surface (1) so that the diameter of the rod portions (15) (15) decreases from the upper end to the lower end.
8) and (18), the tubes (12) and (12) can be easily removed from the vulcanized rubber body (2).
After removal of the tubes (12) and (12), if necessary, a vulcanized rubber body having the same shape as the tubes (12) and (12) may be inserted to close the tube removal holes. Good. The viscoelastic body (1) manufactured as described above is obtained by removing it from the mold (5).
次に、第6図に示すように未加硫ゴム材(2′)の表
面から余剰ゴム材(10)を逃がす従来方法と、第1図に
示すように未加硫ゴム材(2′)の中央部からチューブ
(12)(12)により余剰ゴム材(10)を逃がす本発明方
法とを比較するため、本出願人が行った実験結果に基づ
いて詳述する。尚、この実験に使用したチューブ(1
2)、及び製作した粘弾性体(1)の各部寸法は、第4
図、第5図及び下記に示す通りである。加硫条件は下記
に示す値に設定した。Next, as shown in FIG. 6, a conventional method for releasing the surplus rubber material (10) from the surface of the unvulcanized rubber material (2 '), and as shown in FIG. In order to compare with the method of the present invention in which the surplus rubber material (10) is released from the central part of the tube by the tubes (12) and (12), the method will be described in detail based on the results of experiments conducted by the present applicant. The tubes used in this experiment (1
2) The dimensions of each part of the manufactured viscoelastic body (1) are
FIG. 5, FIG. 5 and below. The vulcanization conditions were set to the values shown below.
チューブ(12):D1=30mm、D2=8mm、D3=2mm、D4=18m
m、D5=20mm、 H1=115mm、H2=10mm、H3=12mm、 粘弾性体(1):d1=150mm、 h1=138mm、h2=h3=19mm、 加硫条件:150℃×160分 上述した諸条件に基づいて行った実験結果では、加硫
ゴム体(2)の表面については、従来方法による場合、
余剰ゴム材が流出した部分で欠損が発生したが、本発明
方法による場合、欠損は全く発生しなかった。Tube (12): D 1 = 30 mm, D 2 = 8 mm, D 3 = 2 mm, D 4 = 18 m
m, D 5 = 20 mm, H 1 = 115 mm, H 2 = 10 mm, H 3 = 12 mm, viscoelastic body (1): d 1 = 150 mm, h 1 = 138 mm, h 2 = h 3 = 19 mm, vulcanization conditions : 150 ° C x 160 minutes According to the results of the experiment conducted based on the above conditions, the surface of the vulcanized rubber body (2) was
Defects occurred in the portion where the surplus rubber material flowed out, but no defects occurred in the case of the method of the present invention.
また、上記加硫ゴム体(2)の中央部からサンプルを
取出し、その比重を測定した結果を下表に示す。尚、各
数値はそれぞれサンプル3個の平均値である。A sample was taken from the center of the vulcanized rubber body (2) and the specific gravity was measured. The results are shown in the table below. Each numerical value is an average value of three samples.
上記表からも明らかなように、本発明方法による場合
の方が従来方法による場合よりも比重が大きくなってお
り、これは気泡の残存が低減していることを意味する。 As is clear from the above table, the specific gravity of the method of the present invention is higher than that of the conventional method, which means that the residual air bubbles are reduced.
更に、加硫ゴム体(2)の外周部の中央部での硬度を
測定した結果を下表に示す。尚、硬度測定はJISK6301
A型硬度計を使用した。Further, the results of measuring the hardness at the center of the outer peripheral portion of the vulcanized rubber body (2) are shown in the table below. In addition, hardness measurement is JISK6301
An A-type hardness tester was used.
上記表から明らかなように、従来品の中央部は気泡が
残存しているため、硬度が低くなっており、本発明方法
による場合は外周部と中央部とで硬度の差が小さくなっ
ており、これは加硫ゴム体(2)の各部で均質となって
いることを意味する。 As is clear from the above table, the center portion of the conventional product has low hardness because bubbles remain, and in the case of the method of the present invention, the difference in hardness between the outer peripheral portion and the center portion is small. This means that each part of the vulcanized rubber body (2) is homogeneous.
以上の実験結果から、本発明方法によれば、欠損も気
泡もない均質な加硫ゴム体(2)を実現できることが明
らかである。From the above experimental results, it is clear that according to the method of the present invention, it is possible to realize a homogeneous vulcanized rubber body (2) having no defects and no bubbles.
尚、上記実施例では、周囲拘束型免震支承の一部を構
成する粘弾性体の製造に適用した場合について説明した
が、本発明はこれに限定されることなく、他の加硫ゴム
体の製造についても適用可能であることは勿論である。In the above embodiment, the case where the present invention is applied to the manufacture of a viscoelastic body constituting a part of a seismic isolation type bearing is described, but the present invention is not limited to this, and other vulcanized rubber bodies may be used. It is needless to say that the present invention can be applied to the production of
また、チューブの本数は2本に限らず、必要に応じて
適宜設定すればよい。Further, the number of tubes is not limited to two, and may be appropriately set as needed.
本発明方法によれば、熱膨張による余剰ゴム材を加硫
中に未加硫ゴム材の中央部からチューブにより金型外部
へ流出させるようにしたから、加硫ゴム体の表面に欠損
が発生することがない。また、上記チューブは断熱性を
有する材料からなるので、チューブ内の余剰ゴム材が流
動し易くなって加硫ゴム体の中央部に気泡が残存するこ
ともない。このように欠損も気泡もない均質な加硫ゴム
体が実現できて品質並びに歩留まりも大幅に向上する。
更に、上記チューブの外周面をその挿入方向に対して傾
くテーパ面としたことにより、加硫後、チューブを加硫
ゴム体から容易に抜脱することができて作業性も大幅に
向上する。According to the method of the present invention, the surplus rubber material due to thermal expansion is caused to flow out of the mold from the central portion of the unvulcanized rubber material through a tube during vulcanization, so that a defect occurs on the surface of the vulcanized rubber body. Never do. In addition, since the tube is made of a material having heat insulating properties, the surplus rubber material in the tube easily flows, and no air bubbles remain in the center of the vulcanized rubber body. As described above, a homogeneous vulcanized rubber body having no defects and no bubbles can be realized, and the quality and the yield are greatly improved.
Further, by forming the outer peripheral surface of the tube as a tapered surface inclined with respect to the insertion direction, the tube can be easily removed from the vulcanized rubber body after vulcanization, and workability is greatly improved.
第1図乃至第4図は本発明方法の一実施例を説明するた
めのもので、第1図は金型内に未加硫ゴム材を収納して
チューブを装着した状態を示す断面図、第2図は金型内
に未加硫ゴム材を収納してチューブを装着する前の状態
を示す断面図、第3図はチューブを示す斜視図、第4図
は第3図のチューブの断面図である。 第5図は加硫ゴム体からなる粘弾性体を示す断面図であ
る。 第6図は従来の加硫ゴム体の製造方法を説明するための
もので、金型内に未加硫ゴム材を収納した状態を示す断
面図である。 (2)……加硫ゴム体、(2′)……未加硫ゴム材、 (5)……金型、(10)……余剰ゴム材、 (12)……チューブ、(18)……テーパ面。1 to 4 are views for explaining one embodiment of the method of the present invention, and FIG. 1 is a cross-sectional view showing a state in which an unvulcanized rubber material is housed in a mold and a tube is mounted. FIG. 2 is a cross-sectional view showing a state before the tube is mounted by storing an unvulcanized rubber material in a mold, FIG. 3 is a perspective view showing the tube, and FIG. 4 is a cross-section of the tube in FIG. FIG. FIG. 5 is a sectional view showing a viscoelastic body made of a vulcanized rubber body. FIG. 6 is a cross-sectional view illustrating a state in which an unvulcanized rubber material is housed in a mold, for explaining a conventional method of manufacturing a vulcanized rubber body. (2) ... vulcanized rubber body, (2 ') ... unvulcanized rubber material, (5) ... mold, (10) ... surplus rubber material, (12) ... tube, (18) ... ... tapered surface.
───────────────────────────────────────────────────── フロントページの続き (58)調査した分野(Int.Cl.6,DB名) B29C 35/02 - 35/14 B29C 33/02 - 33/08 B29C 43/36──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. 6 , DB name) B29C 35/02-35/14 B29C 33/02-33/08 B29C 43/36
Claims (3)
硫ゴム材を加圧状態で加硫するに際し、熱膨張による余
剰ゴム材を加硫中に未加硫ゴム材の中央部からチューブ
により金型外部へ流出させるようにしたことを特徴とす
る加硫ゴム体の製造方法。1. An unvulcanized rubber material is filled in a mold, and when the unvulcanized rubber material is vulcanized in a pressurized state, excess rubber material due to thermal expansion is vulcanized during vulcanization. A method for producing a vulcanized rubber body, characterized in that the vulcanized rubber body is caused to flow out of the mold through a tube from the center of the vulcanized rubber body.
熱性を有する材料からなることを特徴とする請求項
(1)記載の加硫ゴム体の製造方法。2. The method for producing a vulcanized rubber body according to claim 1, wherein the tube embedded in the unvulcanized rubber material is made of a material having a heat insulating property.
面を、その挿入方向に対して傾くテーパ面としたことを
特徴とする請求項(1)記載の加硫ゴム体の製造方法。3. A method for producing a vulcanized rubber body according to claim 1, wherein the outer peripheral surface of the tube inserted into the unvulcanized rubber material is a tapered surface inclined with respect to the insertion direction. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2219694A JP2851691B2 (en) | 1990-08-20 | 1990-08-20 | Manufacturing method of vulcanized rubber body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2219694A JP2851691B2 (en) | 1990-08-20 | 1990-08-20 | Manufacturing method of vulcanized rubber body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04101814A JPH04101814A (en) | 1992-04-03 |
| JP2851691B2 true JP2851691B2 (en) | 1999-01-27 |
Family
ID=16739500
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2219694A Expired - Lifetime JP2851691B2 (en) | 1990-08-20 | 1990-08-20 | Manufacturing method of vulcanized rubber body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2851691B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6689970B2 (en) | 2001-10-04 | 2004-02-10 | Lester E. Burgess | Pressure actuated switching device and method and system for making same |
-
1990
- 1990-08-20 JP JP2219694A patent/JP2851691B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04101814A (en) | 1992-04-03 |
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