JPS609729A - Manufacture of thermal expansion seal - Google Patents
Manufacture of thermal expansion sealInfo
- Publication number
- JPS609729A JPS609729A JP11891483A JP11891483A JPS609729A JP S609729 A JPS609729 A JP S609729A JP 11891483 A JP11891483 A JP 11891483A JP 11891483 A JP11891483 A JP 11891483A JP S609729 A JPS609729 A JP S609729A
- Authority
- JP
- Japan
- Prior art keywords
- thermally expandable
- synthetic resin
- seal
- case
- catalytic converter
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 11
- 229920003002 synthetic resin Polymers 0.000 claims description 12
- 239000000057 synthetic resin Substances 0.000 claims description 12
- 239000003566 sealing material Substances 0.000 claims description 11
- 229920001187 thermosetting polymer Polymers 0.000 claims description 8
- 238000000034 method Methods 0.000 claims description 7
- 230000003197 catalytic effect Effects 0.000 description 13
- 239000000835 fiber Substances 0.000 description 9
- 239000000919 ceramic Substances 0.000 description 8
- 239000003054 catalyst Substances 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 4
- 239000000565 sealant Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000000748 compression moulding Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000009461 vacuum packaging Methods 0.000 description 2
- 239000010455 vermiculite Substances 0.000 description 2
- 229910052902 vermiculite Inorganic materials 0.000 description 2
- 235000019354 vermiculite Nutrition 0.000 description 2
- 229920000459 Nitrile rubber Polymers 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003822 epoxy resin Substances 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000647 polyepoxide Polymers 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
本発明は、排気ガス浄化用触媒コンバータ等に使用する
熱膨張性シールの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a thermally expandable seal used in a catalytic converter for exhaust gas purification and the like.
近年、モノリスキャタリストをケース内に収容した触媒
コンバータにおいて、モノリスキャタリストとケースの
間を軸方向に閉塞するためのシールとして、セラミック
ス繊維に蛭石の粉末を混入した熱膨張性シール材が採用
される傾向にある。In recent years, in catalytic converters that house a monolithic catalyst in a case, a thermally expandable sealing material containing vermiculite powder mixed with ceramic fibers has been adopted as a seal to axially close the gap between the monolithic catalyst and the case. There is a tendency to
この熱膨張性シール材は、高温に加熱されることにより
膨張し、一旦膨張すると凝固して再び収縮せず、かつ、
優れた耐熱性を示すもので、膨張していない常態でモノ
リスキャタリストとケースの間に介挿され、触媒コンバ
ータが高温に曝されるとモノリスキャタリストとケース
の間の空隙を埋めるように膨張し、両者間を確実にシー
ルするので極めて有用ではあるが、常態では非常に脆く
、触媒コンバータに組付ける際に、ケース等と接触する
ことにより簡単に砕損するおそれがある。This thermally expandable sealing material expands when heated to a high temperature, and once expanded, it solidifies and does not contract again.
It exhibits excellent heat resistance and is inserted between the monolithic catalyst and the case in its unexpanded state, and expands to fill the gap between the monolithic catalyst and the case when the catalytic converter is exposed to high temperatures. Although it is extremely useful because it reliably seals the space between the two, it is extremely brittle under normal conditions and may easily break if it comes into contact with a case or the like when assembled into a catalytic converter.
このため、従来、熱膨張性シール材をモノリスキャタリ
ストとケース間の空隙以下の厚みに圧縮成形し、さらに
合成樹脂フィルムで真空包装することによって、組付時
にシール材が砕損するのを回避するようにした方法が提
案されたが、このような方法では、真空包装する際に吸
引ポンプの能力等によって包装できる物の大きさに制限
があるため、長尺のシール材を真空包装することができ
ず、製造能率が悪い不具合があり、また、運搬時や組付
時にフィルムに傷が付くと、そこから空気が入り込んで
、シール材が復元弾性力で圧縮前の厚みに戻ってしまう
不具合があった。For this reason, in the past, thermally expandable sealing materials were compression-molded to a thickness that was less than the gap between the monolithic catalyst and the case, and then vacuum-packed with synthetic resin film to avoid the sealing materials from breaking during assembly. However, with this method, the size of the items that can be packaged is limited by the capacity of the suction pump, etc., so it is difficult to vacuum package long sealing materials. However, if the film is damaged during transportation or assembly, air can enter through the scratches, causing the sealing material to return to its pre-compression thickness due to its elasticity. there were.
本発明は、取上の点に鑑み完成されたものであって、熱
膨張性シール材の組付時における砕損を回避し、そのシ
ール性能を十分に発揮し得る熱膨張性シールを製造する
ことができるとともに、長尺で、しかも、組付前にシー
ル材が元の厚みに戻ってしまうことのないシールを製造
することができる方法を提供することを目的とするもの
である。The present invention has been completed in view of the above-mentioned points, and it is an object of the present invention to manufacture a thermally expandable seal that can avoid crushing during assembly of the thermally expandable sealing material and fully exhibit its sealing performance. It is an object of the present invention to provide a method capable of manufacturing a long seal, which can prevent the seal material from returning to its original thickness before assembly.
以下、本発明方法を触媒コンバータ用シールに適用した
実施例について添付図面を参照して説明する。Hereinafter, an embodiment in which the method of the present invention is applied to a seal for a catalytic converter will be described with reference to the accompanying drawings.
第１図の（ａ）乃至（ｃ）によって熱膨張性シール１の
製造工程を説明すると、まず、同図（ａ）に示すものは
、数百度の温度に加熱することによって膨張する熱膨張
性セラミックス繊維２であって、具体的には、蛭石の粉
末が混入されたアルミナシリカファイバがあり、米国の
３Ｍ社がｒＩＮＴ−ＡＲＡＭＪの商標で販売しており、
その形状は、介挿すべきモノリスキャタリストとケース
との間の空隙に略等しい厚みを有する断面長方形の帯状
となっている。To explain the manufacturing process of the thermally expandable seal 1 with reference to (a) to (c) in Figure 1, first, the one shown in Figure 1(a) is a thermally expandable seal that expands when heated to a temperature of several hundred degrees. Ceramic fiber 2, specifically, is an alumina-silica fiber mixed with vermiculite powder, which is sold by 3M in the United States under the trademark rINT-ARAMJ.
Its shape is a band with a rectangular cross section and a thickness approximately equal to the gap between the monolithic catalyst to be inserted and the case.
そして、このセラミックス繊維２に液状の熱硬化性合成
樹脂を含浸させる。この熱硬化性合成樹脂としては、エ
ポキシ樹脂、絶縁フェス等が好適であり、１５０度前後
の比較的低温度に加熱したときに硬化する性質を持って
いる。Then, this ceramic fiber 2 is impregnated with a liquid thermosetting synthetic resin. Epoxy resin, insulating resin, etc. are suitable as this thermosetting synthetic resin, and have the property of curing when heated to a relatively low temperature of around 150 degrees.
次に、同図（ｂ）に示すように、熱硬化性合成樹脂を含
浸させたセラミックス繊維２を、一対の成形ローラａ、
ａ間で挟圧することにより、その厚みを減じるように圧
縮成形し、さらに、この圧縮されたセラミックス繊維２
を、加熱炉を通して１５０度前後に加熱すると、含浸さ
れた熱硬化性合成樹脂が硬化し、同図（ｃ）に示すよう
に、セラミックス繊維２が圧縮された状態に保持された
熱膨張性シール１が完成するのである。Next, as shown in FIG. 2(b), ceramic fibers 2 impregnated with thermosetting synthetic resin are placed between a pair of forming rollers a,
Compression molding is performed to reduce the thickness by compressing the ceramic fibers 2 and 2.
When heated to around 150 degrees in a heating furnace, the impregnated thermosetting synthetic resin hardens, forming a thermally expandable seal in which the ceramic fibers 2 are held in a compressed state, as shown in FIG. 1 is completed.
次に、第２図において触媒コンバータの組付は手順を説
明すると、まず、上記方法によって製造された熱膨張性
シール１を一定長に切断し、モノリスキャタリスト１０
の一端側の全周に渡って巻き付けて接着等により固定し
、残りの外周の部分３−
には金属メツシュに波付加工を施した円筒形のサポータ
１１を嵌着する。そして、ケース１２の流出口１２ａ側
に金属メツシュを圧縮成形したクッションリング１３を
装着し、しかる後、熱膨張性シール１及びサポータ１１
を装着したモノリスキャタリスト１０を流入口１２ｂか
ら挿入する。このとき、熱膨張性シール１は、モノリス
キャタリスト１０とケース１２との間の空隙以下の厚み
に圧縮された状態にあるから、挿入はきわめて円滑に行
なわれ、ケース１２と接触して砕損するおそれもない。Next, the steps for assembling the catalytic converter will be explained in FIG.
It is wrapped around the entire circumference of one end side and fixed by adhesive or the like, and a cylindrical supporter 11 made of corrugated metal mesh is fitted onto the remaining outer circumferential portion 3-. Then, a cushion ring 13 made of compression molded metal mesh is attached to the outlet 12a side of the case 12, and then the thermally expandable seal 1 and the supporter 11 are attached.
Insert the monolithic catalyst 10 equipped with the inlet from the inlet 12b. At this time, the thermally expandable seal 1 is compressed to a thickness that is less than the gap between the monolithic catalytic converter 10 and the case 12, so the insertion is extremely smooth and there is no risk of it coming into contact with the case 12 and breaking. There's no fear.
そして、触媒コンバータが使用に供され、数百度の高温
雰囲気に曝されると、硬化していた合成樹脂が焼失して
しまうと同時に、セラミックス繊維２がモノリスキャタ
リスト１０とケース１２の間の空隙を埋めるように膨張
し、両者間を確実にシールするとともに、モノリスキャ
タリスト１０をケース１２に対して強固に固定するので
ある。Then, when the catalytic converter is put into use and exposed to a high temperature atmosphere of several hundred degrees, the hardened synthetic resin is burned out, and at the same time the ceramic fibers 2 fill the voids between the monolithic catalytic converter 10 and the case 12. The monolithic catalytic converter 10 expands to fill the space between the two, thereby reliably sealing the space between the two and firmly fixing the monolithic catalytic converter 10 to the case 12.
なお１本実施例のように、熱膨張性シール１を同曲して
使用する場合には、適度な柔軟性を付与４−
するために、熱硬化性合成樹脂にニトリルゴム等の可塑
剤を添加しておくことが望ましい。Note that when the thermally expandable seal 1 is used in the same manner as in this example, a plasticizer such as nitrile rubber is added to the thermosetting synthetic resin in order to impart appropriate flexibility. It is desirable to add it.
また、本発明方法は、本実施例で示したように、触媒コ
ンバータ用シールを製造する場合に限定されるものでは
なく、他の装置に使用されるシールの製造にも有効に適
用することができる。Furthermore, the method of the present invention is not limited to manufacturing seals for catalytic converters as shown in this example, but can also be effectively applied to manufacturing seals used in other devices. can.
すなわち、本発明の熱膨張性シールの製造方法は、一定
温度以上の加熱によって膨張する熱膨張性シール材に、
前記一定温度よりも低い温度に加熱することにより硬化
する熱硬化性合成樹脂を含浸させて圧縮成形し、前記低
い温度に加熱して前記合成樹脂の硬化により前記シール
材を圧縮状態に保持することを要旨とするものであって
、含浸させた熱硬化性合成樹脂の硬化により熱膨張性シ
ール材を圧縮状態に保持するようにしたから、熱膨張性
シール材の組付時における砕損を確実に回避し得る熱膨
張性シールを製造することができ、また、従来のように
真空包装する場合と比較して、長尺のシールを製造する
ことができるために製造能率が向上するとともに、真空
包装機のような高価な設備を必要とせず、加熱炉さえ準
備すれば良いから設備の低廉化を割ることができ、さら
に、フィルムが傷付いてシール材が組付前に膨らんでし
まう事態を回避することができる効果を奏する。That is, the method for manufacturing a thermally expandable seal of the present invention includes a thermally expandable sealing material that expands when heated above a certain temperature,
Impregnating and compression molding a thermosetting synthetic resin that hardens by heating to a temperature lower than the certain temperature, and holding the sealing material in a compressed state by heating to the low temperature and curing the synthetic resin. The main idea is to maintain the thermally expandable sealant in a compressed state by curing the impregnated thermosetting synthetic resin, thereby ensuring that the thermally expandable sealant will not break during assembly. In addition, compared to conventional vacuum packaging, long seals can be manufactured, improving manufacturing efficiency and reducing vacuum packaging. There is no need for expensive equipment such as a packaging machine, and all you need is a heating furnace, so equipment can be kept at low cost.Furthermore, the film can be damaged and the sealant can swell before it is assembled. It has the effect of allowing you to avoid it.
第１図及び第２図は本発明の一実施例を示し、第１図（
ａ）乃至（Ｃ）は、熱膨張性シールの製造工程の説明図
、第２図は、熱膨張性シールを組込んだ触媒コンバータ
の縦断面図である。
■：熱膨張性シール ２：セラミックス繊維出願人 中
央発條株式会社
代理人 弁理士 野 口 宏
７−1 and 2 show an embodiment of the present invention, and FIG. 1 (
a) to (C) are explanatory diagrams of the manufacturing process of the thermally expandable seal, and FIG. 2 is a longitudinal cross-sectional view of a catalytic converter incorporating the thermally expandable seal. ■: Thermal expandable seal 2: Ceramic fiber applicant Chuo Spring Co., Ltd. agent Patent attorney Hiroshi Noguchi 7-
Claims (1)
に、前記一定温度よりも低い温度に加熱することにより
硬化する熱硬化性合成樹脂を含浸させて圧縮成形し、前
記低い温度に加熱して前記合成樹脂の硬化により前記シ
ール材を圧縮状態に保持することを特徴とする熱膨張性
シールの製造方法A thermally expandable sealing material that expands when heated above a certain temperature is impregnated with a thermosetting synthetic resin that hardens when heated to a temperature lower than the certain temperature, and then compressed and molded. A method for manufacturing a thermally expandable seal, characterized in that the sealing material is maintained in a compressed state by curing a synthetic resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11891483A JPS609729A (en) | 1983-06-29 | 1983-06-29 | Manufacture of thermal expansion seal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP11891483A JPS609729A (en) | 1983-06-29 | 1983-06-29 | Manufacture of thermal expansion seal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS609729A true JPS609729A (en) | 1985-01-18 |
Family
ID=14748294
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP11891483A Pending JPS609729A (en) | 1983-06-29 | 1983-06-29 | Manufacture of thermal expansion seal |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS609729A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4827573A (en) * | 1971-06-04 | 1973-04-11 | ||
| JPS5430218A (en) * | 1977-08-08 | 1979-03-06 | Minnesota Mining & Mfg | Flexible and expandable sheet material |
-
1983
- 1983-06-29 JP JP11891483A patent/JPS609729A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4827573A (en) * | 1971-06-04 | 1973-04-11 | ||
| JPS5430218A (en) * | 1977-08-08 | 1979-03-06 | Minnesota Mining & Mfg | Flexible and expandable sheet material |
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