JP2002018290A - Carrier for ceramic honeycomb structure catalyst and ceramic honeycomb structure catalyst converter using the same - Google Patents
Carrier for ceramic honeycomb structure catalyst and ceramic honeycomb structure catalyst converter using the sameInfo
- Publication number
- JP2002018290A JP2002018290A JP2000210868A JP2000210868A JP2002018290A JP 2002018290 A JP2002018290 A JP 2002018290A JP 2000210868 A JP2000210868 A JP 2000210868A JP 2000210868 A JP2000210868 A JP 2000210868A JP 2002018290 A JP2002018290 A JP 2002018290A
- Authority
- JP
- Japan
- Prior art keywords
- carrier
- outer peripheral
- ceramic honeycomb
- metal container
- chamfer
- 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
- 239000003054 catalyst Substances 0.000 title claims abstract description 22
- 239000000919 ceramic Substances 0.000 title claims description 17
- 230000002093 peripheral effect Effects 0.000 claims abstract description 60
- 229910052751 metal Inorganic materials 0.000 claims abstract description 33
- 239000002184 metal Substances 0.000 claims abstract description 33
- 230000003197 catalytic effect Effects 0.000 claims description 25
- 210000004027 cell Anatomy 0.000 description 18
- 239000012876 carrier material Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 229910003460 diamond Inorganic materials 0.000 description 4
- 239000010432 diamond Substances 0.000 description 4
- 239000000463 material Substances 0.000 description 4
- 229910001141 Ductile iron Inorganic materials 0.000 description 3
- 210000002421 cell wall Anatomy 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 239000006061 abrasive grain Substances 0.000 description 2
- 229910052878 cordierite Inorganic materials 0.000 description 2
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009423 ventilation Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 102100024522 Bladder cancer-associated protein Human genes 0.000 description 1
- 101150110835 Blcap gene Proteins 0.000 description 1
- 101100493740 Oryza sativa subsp. japonica BC10 gene Proteins 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004070 electrodeposition Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 229910052697 platinum Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本願発明は、自動車などの排
気ガス浄化装置に用いられ、把持部材を介して金属容器
に収納されるセラミックハニカム構造触媒用担体及びこ
れを用いたセラミックハニカム構造触媒コンバータに関
する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a carrier for a ceramic honeycomb structured catalyst which is used in an exhaust gas purifying apparatus for an automobile or the like and is housed in a metal container via a holding member, and a ceramic honeycomb structured catalytic converter using the same. .
【０００２】[0002]
【従来の技術】地域環境や地球環境の保全面から、自動
車などのエンジンから排出される排気ガスの削減が求め
られ、これに応えるため排気ガス浄化用の触媒コンバー
タが用いられている。触媒コンバータのひとつにセラミ
ックハニカム触媒コンバータ（以下、単に「触媒コンバ
ータ」と言う）があり、この触媒コンバータは、触媒を
担持したセラミックハニカム構造触媒用担体（以下、単
に「担体」と言う）を排気ガスの保有する熱エネルギで
加熱して触媒を活性化し、排気ガスを浄化している。2. Description of the Related Art From the standpoint of preserving the local environment and the global environment, it is required to reduce exhaust gas emitted from engines of automobiles and the like, and a catalytic converter for purifying exhaust gas is used in order to meet the demand. One of the catalytic converters is a ceramic honeycomb catalytic converter (hereinafter, simply referred to as "catalytic converter"). This catalytic converter exhausts a ceramic honeycomb structure catalyst carrier (hereinafter, simply, "carrier") supporting a catalyst. The exhaust gas is purified by heating with the thermal energy of the gas to activate the catalyst.
【０００３】通常、触媒コンバータは、活性アルミナや
白金などの触媒を担持した担体を、把持部材を介し金属
容器に収納して構成されている。ここで、担体は、主に
ＳｉＯ2 、Ａｌ2Ｏ3、ＭｇＯを含むコージェライト質セ
ラミックスなどからなり、平行で無数に形成した排気ガ
スの流路が形成されている。また把持部材は、耐熱性の
非熱膨脹性セラミック繊維などからなる。また金属容器
は、鋼板や高Ｓｉ球状黒鉛鋳鉄材などからなり、把持部
材やセラミックハニカム構造体を収納する内周面が中空
円筒形状で、排気管と連結するフランジ部などが形成さ
れている。触媒コンバータが自動車などのエンジンに搭
載された場合、排気ガスは、排気マニホルドを経て担体
の流路で担持された触媒で浄化され、排気管に向かう。[0003] Usually, a catalytic converter is constructed by accommodating a carrier carrying a catalyst such as activated alumina or platinum in a metal container via a gripping member. Here, the carrier is mainly made of cordierite ceramics containing SiO 2 , Al 2 O 3 , and MgO, and has a number of parallel and exhaust gas passages. The holding member is made of a heat-resistant non-thermally expandable ceramic fiber or the like. The metal container is made of a steel plate or a high Si spheroidal graphite cast iron material, and has a hollow cylindrical inner peripheral surface for accommodating the gripping member and the ceramic honeycomb structure, and has a flange portion connected to an exhaust pipe. When the catalytic converter is mounted on an engine such as an automobile, exhaust gas is purified by a catalyst carried in a flow path of a carrier via an exhaust manifold, and flows toward an exhaust pipe.
【０００４】ところで担体は、前述のコージェライト質
セラミックス原料粉末を混合、混練した後、多数の平行
な貫通孔を形成する金型で押出成形して長尺の担体素材
とし、続いて、担体素材を所定長さに切断した後、焼成
して製造される。ここで、長尺の担体素材の切断は、ダ
イヤモンド砥石や切断ワイヤなどで行われる。[0004] By the way, the carrier is mixed and kneaded with the above-mentioned cordierite-based ceramic raw material powder, and then extruded with a mold having a large number of parallel through holes to form a long carrier material. Is cut into a predetermined length, and then fired to be manufactured. Here, the cutting of the long carrier material is performed with a diamond grindstone, a cutting wire, or the like.
【０００５】一方、担体は金属容器内に収納されるが、
収納する際に担体が破損し難い形状が求められている。
特公昭６１―２７６３号公報には、担体の外周端から端
面に向けて中高に斜めに切り欠き、環状支持部材をこれ
に押圧し、環状支持部材の内周側部分において外周側部
分より強く圧迫挟持される形状とする記載がある。この
特公昭６１―２７６３号公報によれば、環状支持部材か
ら担体の端面へかかる圧縮応力の分布が、内周側部分に
当接する担体端面部分でより大きく、かつ外周側部分に
当接する担体端面部分でより小さくなるようにして、よ
り強い圧縮力で挟持しても外周端に欠損の生起すること
のない担体が得られるとしている。On the other hand, the carrier is stored in a metal container,
There is a demand for a shape in which the carrier is hardly damaged when stored.
In Japanese Patent Publication No. 61-2763, a carrier is cut obliquely from the outer peripheral end toward the end face at an intermediate height, the annular support member is pressed against the support, and the inner peripheral side portion of the annular support member is pressed more strongly than the outer peripheral side portion. There is a description of the shape to be sandwiched. According to Japanese Patent Publication No. 61-2763, the distribution of the compressive stress applied from the annular support member to the end face of the carrier is larger at the end face of the carrier contacting the inner peripheral portion and at the end face of the carrier contacting the outer peripheral portion. It is stated that the carrier can be obtained in which the portion is made smaller and the outer peripheral end is not damaged even when sandwiched by a stronger compressive force.
【０００６】また、特開２０００−４５７５９号公報に
は、担体の外周端とコーンとを当接角が４５〜８５°で
当接し、また担体の外周端の面取り寸法又は面取り半径
を０．１〜１ｍｍとする記載がある。この特開２０００
−４５７５９号公報によれば、当接により、振動による
担体の位置ずれを防止し、面取りにより、コーンとの当
接時に発生する外周端の「ふち欠け」が防止できるとし
ている。Japanese Patent Application Laid-Open No. 2000-45759 discloses that the outer peripheral end of the carrier and the cone contact each other at an abutment angle of 45 to 85 °, and the outer peripheral end of the carrier has a chamfer dimension or chamfer radius of 0.1. There is a description that it is set to 1 mm. This JP 2000
According to Japanese Patent No. 45759, the contact prevents the displacement of the carrier due to the vibration, and the chamfering prevents the "edge defect" of the outer peripheral edge generated at the time of contact with the cone.
【０００７】[0007]
【発明が解決しようとする課題】前述した通り、担体
は、長尺の担体素材をダイヤモンド砥石や切断ワイヤな
どで切断する工程がある。しかし、ダイヤモンド砥石や
切断ワイヤが目詰まりしてくると、切断後、担体の外周
部に微細なクラックが発生することがある。微細なクラ
ックは、その後の焼成、移送や運搬時に大きなクラック
に進展し易い。そして、クラックのある担体をそのまま
組み立てると、排気ガスが通過する通気孔であるセルが
目詰まりとなり、自動車に搭載された時に、触媒コンバ
ータの性能低下を招く要因となる。As described above, the carrier has a process of cutting a long carrier material with a diamond grindstone, a cutting wire, or the like. However, if the diamond grindstone or the cutting wire becomes clogged, fine cracks may occur on the outer peripheral portion of the carrier after cutting. Fine cracks tend to develop into large cracks during subsequent firing, transfer, or transportation. If the carrier having the cracks is assembled as it is, the cells, which are the ventilation holes through which the exhaust gas passes, become clogged, which causes a reduction in the performance of the catalytic converter when mounted on an automobile.
【０００８】上記特公昭６１―２７６３号公報記載の担
体では、把持部材を介して金属容器内に収納する際、担
体の外周端が金属容器や把持部材に当たって組立て性を
悪くするのと同時に、外周端に欠けを生じるおそれがあ
る。この欠けも前述のクラックと同様に、セルの目詰ま
りの原因となり、自動車に搭載された時に、触媒コンバ
ータの性能低下を招く要因となる。なお、特公昭６１―
２７６３号公報には、担体素材を切断後の微細なクラッ
クやその解決手段の記載又は示唆は見当たらない。In the carrier described in JP-B-61-2763, when the carrier is stored in a metal container via a gripping member, the outer peripheral end of the carrier hits the metal container or the gripping member to deteriorate the assemblability, and at the same time, the outer periphery of the carrier is deteriorated. The end may be chipped. This chipping also causes clogging of cells, as in the case of the cracks described above, and also causes a reduction in the performance of the catalytic converter when mounted on an automobile. In addition, Tokiko Sho 61-
In JP-A-2763, there is no description or suggestion of a fine crack after cutting the carrier material or a means for solving the problem.
【０００９】一方、特開２０００−４５７５９号公報に
記載される、外周端の面取り寸法又は面取り半径を０．
１〜１ｍｍとした担体は、面取り寸法が小さすぎ、押出
成形された長尺の担体素材を、所定長さに切断時に発生
しやすい外周端に微細なクラックを除去することは難し
い。また、面取り寸法又は面取り半径の小さい担体は、
金属容器内に収納する際、担体外周端が金属容器や把持
部材に当たって組立て性を悪くするのと同時に、外周端
に欠けを生じるおそれがある。この欠けも前述のクラッ
クと同様に、セルの目詰まりの原因となり、自動車に搭
載された時に、触媒コンバータの性能低下を招く要因と
なる。On the other hand, the chamfer dimension or chamfer radius of the outer peripheral end described in Japanese Patent Application Laid-Open No. 2000-45759 is set to 0.
The support having a length of 1 to 1 mm has too small a chamfer dimension, and it is difficult to remove fine cracks on the outer peripheral edge which is likely to be generated when cutting a long extruded support material into a predetermined length. In addition, the carrier with a small chamfer dimension or chamfer radius is
When the carrier is housed in a metal container, the outer peripheral edge of the carrier may hit the metal container or the gripping member to deteriorate the assemblability, and at the same time, the outer peripheral edge may be chipped. This chipping also causes clogging of cells, as in the case of the cracks described above, and also causes a reduction in the performance of the catalytic converter when mounted on an automobile.
【００１０】本発明の課題は、外周端の微細なクラック
を無くして、金属容器内に収納する際の組立て性を良く
する担体と、セルの目詰まりを無くして自動車に搭載さ
れた時に性能を発揮できる触媒コンバータを得ることに
ある。[0010] An object of the present invention is to provide a carrier that eliminates minute cracks at the outer peripheral edge and improves the assemblability when housed in a metal container, and improves performance when mounted on an automobile by eliminating cell clogging. It is to obtain a catalytic converter that can be used.
【００１１】[0011]
【課題を解決するための手段】上記課題を解決するた
め、本発明の担体は、把持部材を介して金属容器に収納
される担体であって、前記触媒用担体の外周端で端面か
ら外周面に沿った長さＨと、外周面から端面に沿った長
さｈの少なくとも何れか一方が１ｍｍを超え３ｍｍ以下
の面取りが施されていることを特徴とする。担体の外周
端に１ｍｍを超えて面取りを施すのは、１ｍｍ以下で
は、担体素材を切断時に発生しやすい微細なクラックを
除去しきれないからである。一方、面取りを３ｍｍ以下
としたのは、微細なクラックは外周端でせいぜい１〜２
ｍｍでそれ以上になることはないからであり、また、面
取りが３ｍｍを超えて大きくなると、担体端面の全面積
の１０％以上が傾斜面となり、後工程や、移送、運搬な
どでの安定性が悪くなるからである。In order to solve the above-mentioned problems, a carrier according to the present invention is a carrier housed in a metal container via a gripping member. At least one of a length H along the length H and a length h along the end surface from the outer peripheral surface is chamfered to exceed 1 mm and 3 mm or less. The reason why the outer peripheral edge of the carrier is chamfered beyond 1 mm is that if it is 1 mm or less, fine cracks that are easily generated when cutting the carrier material cannot be completely removed. On the other hand, the reason why the chamfer is set to 3 mm or less is that a fine crack is at most 1-2
If the chamfer is larger than 3 mm, more than 10% of the total area of the end face of the carrier becomes an inclined surface, and the stability in the post-process, transfer, transportation, etc. Is worse.
【００１２】また、本発明の担体は、前記面取りが、前
記端面から外周端に向く角度を１０〜８０°、好ましく
は１０〜４５°としていることを特徴とする。端面から
外周端に向く角度を１０°以上とするのは、１０未満で
の面取りでは、担体の端面が殆ど傾斜面となり、後工程
や、移送、運搬などでの安定性が悪くなるからである。
一方、８０°を超えて面取りすると、面取り量が小さす
ぎて、微細なクラックを除去する効果がなく、また、把
持部材を介して金属容器内に収納する際、担体の外周端
が金属容器や把持部材に当たって組立て性を悪くするの
と同時に、外周端に欠けを生じるおそれがあるからであ
る。外周端でのセルを構成するセル壁の露出を少なくす
るためには、面取りは４５°以下が好ましい。更に好ま
しくは２０〜４０°が好適である。なお、面取りは、直
線だけでなく、曲線、例えば円弧でも良い。この時の角
度は、外周端の面取り始点と端面の面取り終点を同一円
周上で結んだ直線を想定し、その角度を端面から外周端
に向く角度とする。Further, the carrier of the present invention is characterized in that the chamfer has an angle from the end face toward the outer peripheral end of 10 to 80 °, preferably 10 to 45 °. The angle from the end face to the outer end is set to 10 ° or more because, if the chamfering is less than 10, the end face of the carrier becomes almost an inclined surface, and the stability in the subsequent process, transport, transportation, etc. is deteriorated. .
On the other hand, if the chamfer is more than 80 °, the chamfer amount is too small, there is no effect of removing fine cracks, and, when housed in a metal container via a gripping member, the outer peripheral edge of the carrier may be a metal container or the like. This is because the gripping member may impair the assemblability and at the same time chip the outer peripheral end. In order to reduce the exposure of the cell wall constituting the cell at the outer peripheral end, the chamfer is preferably 45 ° or less. More preferably, the angle is 20 to 40 °. The chamfer may be not only a straight line but also a curve, for example, a circular arc. The angle at this time is a straight line connecting the chamfering start point of the outer peripheral end and the chamfering end point of the end surface on the same circumference, and the angle is an angle from the end surface to the outer peripheral end.
【００１３】また、本発明の担体は、前記面取りが、セ
ルピッチの１〜３倍であることを特徴とする。なお、セ
ルとは排気ガスの通過する通気孔を言い、セルピッチと
は規定測定数のセル壁中心間距離の平均値を言う。面取
りを、セルピッチの１倍以上とするのは、１倍未満で
は、小さすぎて、微細なクラックを除去する効果がな
く、また、把持部材を介して金属容器内に収納する際、
担体の外周端が金属容器や把持部材に当たって組立て性
を悪くするのと同時に、外周端に欠けを生じるおそれが
あるからである。一方、３倍を超えて面取りすると、担
体の端面の傾斜面が多くなり、後工程や、移送、運搬な
どでの安定性が悪くなるからである。The carrier of the present invention is characterized in that the chamfer is 1 to 3 times the cell pitch. The cell refers to a vent hole through which exhaust gas passes, and the cell pitch refers to an average value of a specified number of measured cell-center distances between cell walls. When the chamfer is made at least 1 time of the cell pitch, if it is less than 1 time, it is too small, there is no effect of removing fine cracks, and when storing in a metal container via a gripping member,
This is because the outer peripheral end of the carrier may impinge on the metal container or the holding member to deteriorate the assemblability, and at the same time, the outer peripheral end may be chipped. On the other hand, if the chamfer is more than three times, the inclined surface of the end face of the carrier increases, and the stability in the post-process, transfer, transportation and the like is deteriorated.
【００１４】そして本発明の触媒コンバータは、上記担
体を用いたことを特徴とする。前記した本発明の担体を
用いた触媒コンバータは、セルの目詰まりを無くして自
動車に搭載された時に性能を発揮できる。A catalytic converter according to the present invention is characterized by using the above-mentioned carrier. The catalytic converter using the above-described carrier of the present invention can exhibit its performance when mounted on an automobile without clogging of cells.
【００１５】[0015]
【発明の実施の形態】以下、本発明を実施の形態を説明
するが、本発明はこれらの実施の形態に限定されるもの
ではない。図１及び図２は実施の形態の担体であり、図
１はその斜視図、図２は側面図である。担体１は、把持
部材（図示せず）を介して金属容器（図示せず）に収納
される担体であって、一方の外周端１ｅ−１に、端面か
ら外周面に沿った長さＨと、外周面から端面に沿った長
さｈの少なくとも何れか一方が１ｍｍを超え３ｍｍ以下
の面取り１ａ−１が施されている。そして、この面取り
１ａ−１は、端面１ｂ−１から外周端１ｅ−１に向く角
度θを１０〜８０°、好ましくは１０〜４５°として施
されている。また、面取り１ａ−１は、セルピッチｐの
１〜３倍として施されている。また、他方の外周端１ｅ
−２にも、一方の外周端１ｅ−１と同様に、１ｍｍを超
え３ｍｍ以下、角度θを１０〜８０°好ましくは１０〜
４５°、セルピッチｐの１〜３倍とした面取り１ａ−２
が施されている。１ａ−ａは面取りの始点、１ａ−ｂは
面取りの終点を示す。なお、担体１は、外周面１ｄの直
径が９０ｍｍで、長手方向が８０ｍｍである。担体１の
端面１ｂ−１、１ｂ−２方向の面取り高さ（ｈ）が少な
いので、後工程や、移送、運搬などでの安定性が良い。DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but the present invention is not limited to these embodiments. 1 and 2 show a carrier according to an embodiment. FIG. 1 is a perspective view of the carrier, and FIG. 2 is a side view. The carrier 1 is a carrier housed in a metal container (not shown) via a gripping member (not shown). The carrier 1 has a length H along the outer peripheral surface from the end face to one outer peripheral end 1e-1. In addition, a chamfer 1a-1 having at least one of a length h from the outer peripheral surface to the end surface exceeding 1 mm and not more than 3 mm is provided. The chamfer 1a-1 is formed so that the angle θ from the end face 1b-1 to the outer peripheral end 1e-1 is 10 to 80 °, preferably 10 to 45 °. In addition, the chamfer 1a-1 is provided as 1 to 3 times the cell pitch p. Also, the other outer peripheral end 1e
-2, as in the case of one outer peripheral end 1e-1, more than 1 mm and 3 mm or less, and the angle θ is 10 to 80 °, preferably 10 to 80 °.
Chamfer 1a-2 with 45 ° and 1 to 3 times the cell pitch p
Is given. 1a-a indicates the starting point of chamfering and 1a-b indicates the ending point of chamfering. The carrier 1 has an outer peripheral surface 1d having a diameter of 90 mm and a longitudinal direction of 80 mm. Since the chamfering height (h) in the direction of the end faces 1b-1 and 1b-2 of the carrier 1 is small, the stability in the post-process, transfer, and transportation is good.
【００１６】次に、担体１の面取りの創成について、外
周端１ｅ−１、１ｅ−２を纏めて説明する。なお、この
面取りは、押出成形された長尺の担体素材（図示せず）
を所定長さに切断し、更に焼成した後で行う。図３は、
カップ型砥石１６で担体１に面取り１ａを付ける研削状
況を示す要部断面図である。カップ型砥石１６は、基体
１７の内側にダイヤモンド砥粒を電着した電着層１８を
有する。砥粒の粒度は、８０番から２４０番位がよい
が、８０番より目が粗いと、担体１のセル壁を壊すこと
になり、逆にカケを発生させることになる。また２４０
番より目が細かいと、うまく削れるがすぐに目詰まりを
起し、実作業には適さない。最適な粒度は、１２０〜１
８０番位である。カップ型砥石１６の内角（α）は、端
面から外周端に向く角度（θ）に応じて製作すればよ
い。なお、面取り１ａは、カップ型砥石１６以外にも、
平型砥石、円筒砥石などによっても創成することができ
る。Next, the creation of the chamfer of the carrier 1 will be described together with the outer peripheral ends 1e-1 and 1e-2. In addition, this chamfer is a long carrier material extruded (not shown).
Is cut to a predetermined length and further fired. FIG.
FIG. 4 is a cross-sectional view of a main part showing a grinding situation in which a chamfer 1a is formed on a carrier 1 by a cup-type grindstone 16; The cup-type grindstone 16 has an electrodeposition layer 18 on which diamond abrasive grains are electrodeposited inside a base 17. The grain size of the abrasive grains is preferably about No. 80 to No. 240. However, if the grain size is coarser than No. 80, the cell walls of the carrier 1 will be broken, and conversely, chip will be generated. Also 240
If it is finer than the turn, it can be cut well but clogs immediately and is not suitable for actual work. The optimal particle size is 120-1
It is number 80. The inner angle (α) of the cup-shaped grindstone 16 may be manufactured according to the angle (θ) from the end face to the outer peripheral end. In addition, the chamfer 1a is not limited to the cup-type grindstone 16,
It can also be created by a flat whetstone, cylindrical whetstone, or the like.
【００１７】面取り１ａを、外周端１ｅに、端面から外
周面に沿った長さＨと、外周面から端面に沿った長さｈ
の少なくとも何れか一方が１ｍｍを超え３ｍｍ以下、端
面１ｂから外周端１ｅに向く角度θを１０〜８０°、好
ましくは１０〜４５°、またセルピッチｐの１〜３倍と
して施すことにより、成形後の切断時に発生した外周部
１ｅの微細クラックを除去することができる。The chamfer 1a is formed on the outer peripheral end 1e by a length H extending from the end surface to the outer peripheral surface and a length h extending from the outer peripheral surface to the end surface.
At least one of them is more than 1 mm and not more than 3 mm, the angle θ from the end face 1b to the outer peripheral end 1e is 10 to 80 °, preferably 10 to 45 °, and 1 to 3 times the cell pitch p. It is possible to remove fine cracks in the outer peripheral portion 1e generated at the time of cutting.
【００１８】次に、面取り１ａを施した担体１を、把持
部材を介して金属容器に組み立てる一例について説明す
る。図４は、担体１を圧入工具２０で金属容器２に収納
している状態を示す要部断面図である。図４で、２１は
担体１の保持具であり、２２は圧入具である。担体１の
金属容器２への収納は例えば以下のようにして行う。先
ず、金属容器２を、図示しない固定治具に位置決め、固
定する。次に、金属容器２内にキャップ７、把持部材３
をセットする。次に、金属容器２上に、担体１を嵌入し
た保持具２１を載置する。続いて、圧入具２２を担体１
上に載置し、かつ油圧プレスなどで圧力を検知しながら
荷重Ｐを付加する。そして、担体１を金属容器２内の規
定位置まで圧入する。Next, an example of assembling the carrier 1 with the chamfered 1a into a metal container via a gripping member will be described. FIG. 4 is a cross-sectional view of a main part showing a state where the carrier 1 is housed in the metal container 2 by the press-fitting tool 20. In FIG. 4, 21 is a holder for the carrier 1, and 22 is a press-in tool. The carrier 1 is stored in the metal container 2 as follows, for example. First, the metal container 2 is positioned and fixed on a fixing jig (not shown). Next, the cap 7 and the holding member 3 are placed in the metal container 2.
Is set. Next, the holder 21 in which the carrier 1 is fitted is placed on the metal container 2. Subsequently, the press fitting 22 is moved to the carrier 1.
The load P is placed on the top and a load is applied while detecting the pressure with a hydraulic press or the like. Then, the carrier 1 is pressed into a prescribed position in the metal container 2.
【００１９】担体１の外周端１ｅへの面取り１ａを、図
４でのＨ寸法が１ｍｍを超え３ｍｍ以下、端面１ｂから
外周端１ｅに向く角度θを１０〜８０°、好ましくは１
０〜４５°、またセルピッチｐの１〜３倍としているの
で、把持部材３を介して金属容器２内に収納する際、担
体１の外周端１ｅが金属容器２や把持部材３に当たって
組立て性を悪くすることはなく、また外周端１ｅに欠け
を生じるおそれがない。更に、この面取り１ａは、後工
程や、移送、運搬などでの安定性が良い。The chamfer 1a to the outer peripheral end 1e of the carrier 1 is set so that the H dimension in FIG. 4 is more than 1 mm and 3 mm or less, and the angle θ from the end face 1b to the outer peripheral end 1e is 10 to 80 °, preferably 1
Since it is 0 to 45 ° and 1 to 3 times the cell pitch p, when the carrier 1 is stored in the metal container 2 via the holding member 3, the outer peripheral end 1 e of the carrier 1 hits the metal container 2 or the holding member 3 to improve the assemblability. There is no possibility that the outer peripheral end 1e will be chipped. Further, the chamfer 1a has good stability in a post-process, transfer, transportation and the like.
【００２０】次に、担体１を用いた触媒コンバータにつ
いて説明する。図５は、触媒コンバータ１０を、排気マ
ニホルド４にボルト５で締め付けて連結した要部断面図
である。図５で、触媒コンバータ１０は、把持部材３を
介して、Ｈ寸法が１ｍｍを超え３ｍｍ以下、端面１ｂか
ら外周端１ｅに向く角度θが１０〜８０°、好ましくは
１０〜４５°、またセルピッチｐの１〜３倍として面取
り１ａされた担体１が、金属容器２に収納されている。
金属容器２は、高Ｓｉ球状黒鉛鋳鉄材からなり、把持部
材３を介して担体１が収納される内径２ａは、中空円筒
状で、排気管（図示せず）と連結するフランジ部２ｄに
向けてコーン部２ｃを形成している。また、把持部材３
は、耐熱性の非熱膨張セラミック繊維からなる。自動車
などのエンジンに搭載された場合、排気ガスは排気マニ
ホルド４に入った後（ＩＮで示す）、コーン部４ｃを経
て担体１に担持された触媒（図示せず）で浄化され、コ
ーン部２ｃを経て排気管に向かう（ＯＵＴで示す）。こ
こでは、金属容器２として高Ｓｉ球状黒鉛鋳鉄材の例を
示したが、鋼板で製作されたものでも良い。また、触媒
コンバータ１０と排気マニホルド４がボルトで締結され
る例を挙げたが、摩擦圧接または単なる溶接で接合され
たものにも適用可能である。図５の触媒コンバータ１０
は、担体１の外周部１ａに欠けなどの発生は起こらない
ので、セルの目詰まりが無く、自動車に搭載された時に
触媒コンバータの性能を発揮できる。Next, a catalytic converter using the carrier 1 will be described. FIG. 5 is a cross-sectional view of a main part in which the catalytic converter 10 is connected to the exhaust manifold 4 by tightening with bolts 5. In FIG. 5, the catalytic converter 10 has an H dimension of more than 1 mm and not more than 3 mm via the holding member 3, an angle θ from the end face 1b to the outer peripheral end 1e of 10 to 80 °, preferably 10 to 45 °, and a cell pitch. The carrier 1 chamfered 1a as 1 to 3 times p is stored in the metal container 2.
The metal container 2 is made of a high Si spheroidal graphite cast iron material, and has an inner diameter 2a in which the carrier 1 is housed via a gripping member 3 and has a hollow cylindrical shape and is directed toward a flange 2d connected to an exhaust pipe (not shown). To form a cone portion 2c. In addition, gripping member 3
Consists of heat-resistant non-thermally expanded ceramic fibers. When mounted on an engine such as an automobile, the exhaust gas enters the exhaust manifold 4 (indicated by IN), is purified by a catalyst (not shown) carried on the carrier 1 via a cone portion 4c, and is purified by the cone portion 2c. To the exhaust pipe (represented by OUT). Here, an example of the high Si spheroidal graphite cast iron material is shown as the metal container 2, but it may be made of a steel plate. Further, the example in which the catalytic converter 10 and the exhaust manifold 4 are fastened with bolts has been described, but the present invention is also applicable to a case where the catalyst converter 10 and the exhaust manifold 4 are joined by friction welding or simple welding. The catalytic converter 10 of FIG.
Since no chipping or the like occurs in the outer peripheral portion 1a of the carrier 1, there is no clogging of the cell, and the performance of the catalytic converter can be exhibited when mounted on an automobile.
【００２１】[0021]
【発明の効果】本発明の担体は、外周端の微細なクラッ
クを無くして、金属容器内に収納する際の組立て性が良
くなる。また別発明の触媒コンバータは、排気ガスが通
過する通気孔であるセルの目詰まりがなく、自動車に搭
載された時に性能を発揮できる。According to the carrier of the present invention, fine cracks on the outer peripheral end are eliminated, and the assemblability when the carrier is housed in a metal container is improved. Further, the catalytic converter according to another aspect of the present invention has no clogging of cells serving as ventilation holes through which exhaust gas passes, and can exhibit performance when mounted on an automobile.
【図１】実施の形態の担体の斜視図である。FIG. 1 is a perspective view of a carrier according to an embodiment.
【図２】実施の形態の担体の側面図である。FIG. 2 is a side view of the carrier according to the embodiment.
【図３】カップ型砥石で担体に面取りを付ける研削状況
を示す要部断面図である。FIG. 3 is a cross-sectional view of a main part showing a grinding situation in which a carrier is chamfered with a cup-type grindstone.
【図４】担体を圧入工具で金属容器２に収納している状
態を示す要部断面図である。FIG. 4 is a sectional view of a main part showing a state where the carrier is housed in a metal container 2 by a press-fitting tool.
【図５】触媒コンバータを、排気マニホルドにボルトで
締め付けて連結した要部断面図である。FIG. 5 is a sectional view of a main part in which the catalytic converter is connected to the exhaust manifold by bolting.
１：セラミックハニカム構造触媒用担体（担体） １ａ，１ａ−１，１ａ−２：面取り １ｂ，１ｂ−１，１ｂ−２：端面 １ｅ，１ｅ−１，１ｅ−２：外周端 ２：金属容器 ３：把持部材 ４：排気マニホルド ７：キャップ １０：セラミックハニカム構造触媒コンバータ（触媒コ
ンバータ） θ：端面から外周端に向く角度 ｐ：セルピッチ1: Support for ceramic honeycomb structure catalyst (support) 1a, 1a-1, 1a-2: chamfering 1b, 1b-1, 1b-2: end face 1e, 1e-1, 1e-2: outer peripheral end 2: metal container 3 : Grasping member 4: Exhaust manifold 7: Cap 10: Ceramic honeycomb structured catalytic converter (catalytic converter) θ: Angle from end face to outer peripheral end p: Cell pitch
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 3G091 AA02 AB01 BA38 BA39 GA06 GA16 GB01X GB10X GB17X 4D048 BA10Y BA42Y BB02 BC10 CA01 CC04 CC06 4G069 AA01 AA08 BA13A CA03 EA19 FB74 FB80 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 3G091 AA02 AB01 BA38 BA39 GA06 GA16 GB01X GB10X GB17X 4D048 BA10Y BA42Y BB02 BC10 CA01 CC04 CC06 4G069 AA01 AA08 BA13A CA03 EA19 FB74 FB80
Claims (5)
セラミックハニカム構造触媒用担体であって、前記触媒
用担体の外周端で端面から外周面に沿った長さＨと、外
周面から端面に沿った長さｈの少なくとも何れか一方
が、１ｍｍを超え３ｍｍ以下の面取りが施されているこ
とを特徴とするセラミックハニカム構造触媒用担体。1. A ceramic honeycomb structured catalyst support housed in a metal container via a gripping member, wherein the catalyst support has an outer peripheral end, a length H extending from an end face to an outer peripheral face, and an outer peripheral face to an end face. Characterized in that at least one of the lengths h along the line is chamfered in a range from more than 1 mm to 3 mm or less.
りが、前記端面から外周端に向く角度を１０〜８０°と
していることを特徴とするセラミックハニカム構造触媒
用担体。2. A ceramic honeycomb structured catalyst carrier according to claim 1, wherein the angle of the chamfer of the catalyst carrier according to claim 1 from the end face to the outer peripheral end is 10 to 80 °.
向く角度を１０〜４５°としていることを特徴とするセ
ラミックハニカム構造触媒用担体。3. The catalyst honeycomb catalyst carrier according to claim 2, wherein the angle from the end face toward the outer peripheral end is 10 to 45 °.
用担体の面取りが、セルピッチの１〜３倍であることを
特徴とするセラミックハニカム構造触媒用担体。4. The catalyst carrier according to claim 1, wherein the chamfer of the catalyst carrier according to claim 1 is 1 to 3 times a cell pitch.
ラミックハニカム構造触媒担体を用いたことを特徴とす
るセラミックハニカム構造触媒コンバータ。5. A ceramic honeycomb structured catalytic converter comprising the ceramic honeycomb structured catalyst carrier according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000210868A JP2002018290A (en) | 2000-07-12 | 2000-07-12 | Carrier for ceramic honeycomb structure catalyst and ceramic honeycomb structure catalyst converter using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000210868A JP2002018290A (en) | 2000-07-12 | 2000-07-12 | Carrier for ceramic honeycomb structure catalyst and ceramic honeycomb structure catalyst converter using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002018290A true JP2002018290A (en) | 2002-01-22 |
Family
ID=18707069
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000210868A Pending JP2002018290A (en) | 2000-07-12 | 2000-07-12 | Carrier for ceramic honeycomb structure catalyst and ceramic honeycomb structure catalyst converter using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002018290A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006281039A (en) * | 2005-03-31 | 2006-10-19 | Hitachi Metals Ltd | Manufacturing method of ceramic honeycomb structure |
| JP2007144922A (en) * | 2005-11-30 | 2007-06-14 | Hitachi Metals Ltd | Manufacturing method of ceramic honeycomb structure |
| WO2008136898A2 (en) * | 2007-04-30 | 2008-11-13 | Corning Incorporated | Methods and apparatus for making honeycomb structures with chamfered after-applied skin and honeycomb structures produced thereby |
| JP2011177889A (en) * | 2005-03-22 | 2011-09-15 | Schott Ag | Grinding method |
| US8092749B2 (en) * | 2005-09-27 | 2012-01-10 | J. Eberspaecher Gmbh & Co. Kg | Exhaust gas treatment device |
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| JPS612763B2 (en) * | 1980-05-20 | 1986-01-28 | Ngk Insulators Ltd | |
| JP2000045759A (en) * | 1998-07-23 | 2000-02-15 | Ngk Insulators Ltd | Gas channel having honeycomb structure |
| JP2001190916A (en) * | 2000-01-13 | 2001-07-17 | Ngk Insulators Ltd | Honeycomb structure |
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2000
- 2000-07-12 JP JP2000210868A patent/JP2002018290A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS612763B2 (en) * | 1980-05-20 | 1986-01-28 | Ngk Insulators Ltd | |
| JP2000045759A (en) * | 1998-07-23 | 2000-02-15 | Ngk Insulators Ltd | Gas channel having honeycomb structure |
| JP2001190916A (en) * | 2000-01-13 | 2001-07-17 | Ngk Insulators Ltd | Honeycomb structure |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011177889A (en) * | 2005-03-22 | 2011-09-15 | Schott Ag | Grinding method |
| JP2006281039A (en) * | 2005-03-31 | 2006-10-19 | Hitachi Metals Ltd | Manufacturing method of ceramic honeycomb structure |
| JP4632125B2 (en) * | 2005-03-31 | 2011-02-16 | 日立金属株式会社 | Method for manufacturing ceramic honeycomb structure |
| US8092749B2 (en) * | 2005-09-27 | 2012-01-10 | J. Eberspaecher Gmbh & Co. Kg | Exhaust gas treatment device |
| JP2007144922A (en) * | 2005-11-30 | 2007-06-14 | Hitachi Metals Ltd | Manufacturing method of ceramic honeycomb structure |
| WO2008136898A2 (en) * | 2007-04-30 | 2008-11-13 | Corning Incorporated | Methods and apparatus for making honeycomb structures with chamfered after-applied skin and honeycomb structures produced thereby |
| WO2008136898A3 (en) * | 2007-04-30 | 2009-02-12 | Corning Inc | Methods and apparatus for making honeycomb structures with chamfered after-applied skin and honeycomb structures produced thereby |
| JP2010525965A (en) * | 2007-04-30 | 2010-07-29 | コーニング インコーポレイテッド | Method and apparatus for manufacturing honeycomb structure with chamfered outer skin and honeycomb structure |
| US9089992B2 (en) | 2007-04-30 | 2015-07-28 | Corning Incorporated | Methods and apparatus for making honeycomb structures with chamfered after-applied akin and honeycomb structures produced thereby |
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