JPH08122196A - Method and device for detecting defect of honeycomb molded body - Google Patents
Method and device for detecting defect of honeycomb molded bodyInfo
- Publication number
- JPH08122196A JPH08122196A JP6257965A JP25796594A JPH08122196A JP H08122196 A JPH08122196 A JP H08122196A JP 6257965 A JP6257965 A JP 6257965A JP 25796594 A JP25796594 A JP 25796594A JP H08122196 A JPH08122196 A JP H08122196A
- Authority
- JP
- Japan
- Prior art keywords
- gas
- cell
- formed body
- honeycomb formed
- cells
- 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.)
- Granted
Links
Landscapes
- Examining Or Testing Airtightness (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ハニカム成形体の検査
方法に係り、成形体の内部に存在する欠陥を簡便に検出
するのに好適な検査方法およびその装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for inspecting a honeycomb formed body, and more particularly to an inspection method and an apparatus suitable for easily detecting defects existing inside the formed body.
【０００２】[0002]
【従来の技術】従来からハニカム形状は、単位体積当た
りの面積が大きくとれることから触媒の形状として採用
されている。ハニカム触媒は原料ペーストを口金からの
押出成形することにより成形され、乾燥、焼成を経て製
造されている。押出成形の過程では、ペーストの不均
質、成形時の温度むら、口金流路における加工精度むら
などにより成形残留応力が発生し、乾燥時や焼成時に割
れが発生することがある。また、均質に成形されたもの
でも乾燥時の乾燥速度むらによる割れや、焼成時の温度
むらに起因する応力による割れが生じることもある。こ
れらの割れの中でも、外周に発生する割れの場合は、目
視によっても十分判別できるが、中心部分に発生した流
路の流れ方向の割れや直角方向の割れを検出することは
極めて困難である。極端な場合、内部に欠陥が存在した
状態でこのハニカム触媒を輸送したり使用したりする
と、外力による振動や応力の発生により、破壊してしま
うこともある。このため、ハニカム成形体の内部の欠陥
を検出することが製品の品質管理の面で極めて重要な項
目である。2. Description of the Related Art Conventionally, a honeycomb shape has been adopted as a catalyst shape because it can have a large area per unit volume. The honeycomb catalyst is formed by extrusion-molding a raw material paste from a die, and is manufactured by being dried and fired. In the process of extrusion molding, residual molding stress may occur due to inhomogeneity of the paste, uneven temperature during molding, uneven processing accuracy in the die passage, and cracks may occur during drying or firing. Even a homogeneously molded product may have cracks due to uneven drying speed during drying and cracks due to stress due to uneven temperature during baking. Among these cracks, cracks that occur on the outer periphery can be sufficiently discriminated by visual observation, but it is extremely difficult to detect cracks in the flow direction of the flow path or at right angles that have occurred in the central portion. In an extreme case, if this honeycomb catalyst is transported or used with defects inside, it may be destroyed due to vibration or stress generated by an external force. Therefore, detecting defects inside the honeycomb molded body is an extremely important item in terms of product quality control.
【０００３】[0003]
【発明が解決しようとする課題】ハニカム成形体の検査
方法としては、次の方法が考えられているが、いずれも
完全な方法とは言い難く、改善の余地が残されている。
一つの方法はハニカムのセル流路内で亀裂が存在すれば
光が散乱するという原理を利用し、端面から光を当て、
反対側でその強度を検出し、その減衰度によってセル流
路内部の亀裂の有無を推定する光透過法である。この方
法によれば、口金流路の流動抵抗の差によって発生した
セル表面粗さのむらや、焼成時の温度むらや触媒成分の
微妙な酸化還元の差に起因した反射率に差が生じ、これ
らの場合に起因する光散乱強度の減衰度と亀裂に起因す
る光散乱強度の減衰度との区別が困難である。別の方法
は振動を利用するもので、セル流路内の亀裂の有無によ
ってハニカム成形体の固有振動数が異なる原理を利用し
た打音試験法である。この方法では極端な大きな亀裂は
検出できても、小さな亀裂の検出は困難である。The following methods have been considered as methods for inspecting honeycomb formed bodies, but none of them are perfect methods, and there is room for improvement.
One method uses the principle that light is scattered if there are cracks in the honeycomb cell flow channel, and light is applied from the end face.
This is a light transmission method in which the intensity is detected on the opposite side and the presence or absence of cracks inside the cell channel is estimated by the degree of attenuation. According to this method, unevenness of cell surface roughness caused by a difference in flow resistance of the die flow path, a difference in reflectance due to a temperature difference during firing, and a slight difference in redox of the catalyst component are generated. It is difficult to distinguish the attenuation degree of the light scattering intensity due to the above case from the attenuation degree of the light scattering intensity due to the crack. Another method uses vibration, which is a tapping test method that uses the principle that the natural frequency of the honeycomb formed body varies depending on the presence or absence of cracks in the cell flow passage. Although this method can detect extremely large cracks, it is difficult to detect small cracks.
【０００４】もう一つ別のものは、直接Ｘ線により撮影
する方法である。この場合ハニカム成形体のセル流路方
向の亀裂の検出が困難なことと、長尺ハニカム成形体の
場合にはセル流路に対して直角方向の亀裂の検出も困難
となる。この他ハニカム成形体の一方向から熱流束を与
えた場合に、セル内に亀裂の存在する部分が熱の抵抗体
となって急激な温度降下が生じるという原理を用いた熱
的方法などが挙げられる。この場合は、ハニカム成形体
のセル流路方向の亀裂と長尺ものの流路に対して直角方
向の亀裂の検出も困難となると共に熱伝導率の小さな材
料では検査ができないことがある。本発明の目的は簡単
な方法で確実にハニカム成形体のセル流路内部の亀裂の
有無を検出する方法と装置を提供することである。Another method is a method of direct X-ray imaging. In this case, it is difficult to detect cracks in the cell flow passage direction of the honeycomb formed body, and it is also difficult to detect cracks in the direction perpendicular to the cell flow passage in the case of the long honeycomb formed body. In addition to this, when a heat flux is applied from one direction of the honeycomb formed body, a thermal method using the principle that a portion where a crack exists in the cell becomes a heat resistance body and a sudden temperature drop occurs To be In this case, it is difficult to detect cracks in the cell flow path direction of the honeycomb formed body and cracks in the direction perpendicular to the long flow path, and it may not be possible to inspect with a material having a small thermal conductivity. An object of the present invention is to provide a method and a device for surely detecting the presence or absence of cracks inside the cell channels of a honeycomb formed body by a simple method.
【０００５】[0005]
【課題を解決するための手段】本発明の目的は次の構成
によって達成される。すなわち、ハニカム成形体端面の
セル群の内、１個もしくは複数個のセルに気体を流入さ
せ、該セル以外からの該気体の漏洩の有無を調べること
により、セル内在欠陥を検出するハニカム成形体の欠陥
検出方法である。ここで、セル内在欠陥は気体を流入さ
せるセル群のうち１個もしくは複数個のセル内の気体圧
力または気体流量と、該セル以外からの該気体の圧力ま
たは気体流量の比較で漏洩の有無を調べることができ
る。The object of the present invention is achieved by the following constitutions. That is, a honeycomb molded body that detects a cell internal defect by injecting a gas into one or more cells of the cell group on the end face of the honeycomb molded body and checking whether or not the gas leaks from other than the cells. This is a defect detection method. Here, the cell internal defect is a presence or absence of leakage by comparing the gas pressure or gas flow rate in one or more cells of the cell group into which gas is introduced with the pressure or gas flow rate of the gas from other than the cell. You can look it up.
【０００６】また、本発明の目的は次の構成によって達
成される。すなわち、ハニカム成形体の一方の端面を施
栓する端面シール部材と、反対側端面のセル群の内、１
個もしくは複数個のセルに気体を流入させる気体供給部
材と、該セル以外の前記反対側端面を覆う漏洩気体検出
用のチャンバと、気体供給部材および漏洩気体検出用チ
ャンバとに設けた圧力計もしくは流量計とからなるハニ
カム成形体の欠陥検出装置である。Further, the object of the present invention is achieved by the following constitution. That is, of the end face seal member for plugging one end face of the honeycomb formed body and the cell group on the opposite end face, 1
A gas supply member for allowing gas to flow into one or a plurality of cells, a chamber for leak gas detection that covers the opposite end surface other than the cells, and a pressure gauge provided on the gas supply member and the leak gas detection chamber, or It is a honeycomb molded body defect detection apparatus including a flow meter.
【０００７】[0007]
【作用】ハニカム成形体の個々のセルはセル壁によって
区切られ、独立した流路となっている。このような健全
なハニカム成形体では、１個または複数のセル流路の片
側から加圧気体を流入すると、反対面の流路から流出
し、加圧気体は流入したセル以外のセルから流出しな
い。ところがセル流路内の中央部分などにおいて、流路
方向に対して直角方向や平行方向に亀裂が存在する場合
は、亀裂を介して気体の流路がつながることになる。こ
うして、本発明は、亀裂による流路短絡から生じる流体
の漏洩を気体圧力または流量の変化を測定することで検
出するものである。具体的には、ハニカム成形体端面の
セル群のうち１個もしくは複数個のセルに加圧気体を流
入し、該セル以外からの漏洩程度を調べることにより、
セル欠陥を検出する。漏洩の程度の指標としては圧力計
もしくは流量計による計測値を用いると良い。The individual cells of the honeycomb formed body are divided by the cell walls to form independent flow paths. In such a healthy honeycomb formed body, when the pressurized gas flows in from one side of one or a plurality of cell flow paths, it flows out from the flow path on the opposite surface, and the pressurized gas does not flow out from cells other than the flow-in cells. . However, if a crack exists in the central portion or the like in the cell flow channel in a direction perpendicular to or parallel to the flow channel direction, the gas flow channel is connected through the crack. Thus, the present invention detects fluid leakage resulting from flow path short circuit due to cracks by measuring changes in gas pressure or flow rate. Specifically, by injecting a pressurized gas into one or a plurality of cells in the cell group on the end face of the honeycomb formed body and examining the extent of leakage from other than the cells,
Detect cell defects. A value measured by a pressure gauge or a flow meter may be used as an indicator of the degree of leakage.
【０００８】[0008]
【実施例】本発明の一実施例を図面と共に説明する。図
１に示す検査装置の実施例を用いて説明する。まず、検
査台９上に設置されるハニカム成形体１の片端面は端面
シール板２によって完全に施栓する。他の端面から加圧
気体を供給するための、三次元（ＸＹＺ軸）方向に移動
脱着可能な加圧気体供給プローブ３と、さらに加圧気体
を供給する以外のセルを１つの流路に束ねた圧力計付き
漏洩気体集合チャンバ４からなる。該チャンバ４はプロ
ーブ３をハニカム成形体１の片端面の任意の位置に固定
できるようにフレキシブルな構造が必須条件である。被
検査体のハニカム成形体１に本実施例の検査装置を装着
するためのポイントは、製品の端面を傷つけずに、しか
も加圧気体が漏れないようにすることである。このた
め、端面シール板２、加圧気体供給プローブ３および漏
洩気体集合チャンバ４がハニカム成形体１に密着する部
分には柔らかいウレタン製のシール材を用いるとよい。
また、加圧気体は加圧気体供給ヘッダ６からプローブト
ラバース装置５付きの加圧気体供給プローブ３に供給さ
れる。加圧気体の圧力は加圧気体供給ヘッダ６に設けら
れた供給気体圧力検出器７で検出され、セルからの漏洩
気体の圧力は漏洩気体集合チャンバ４に設けられた漏洩
検出圧力計８で検出される。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings. An example of the inspection apparatus shown in FIG. 1 will be described. First, one end surface of the honeycomb formed body 1 placed on the inspection table 9 is completely plugged by the end face seal plate 2. A pressurized gas supply probe 3, which is movable in three dimensions (XYZ axes) for supplying pressurized gas from the other end face, and a cell other than the pressurized gas supply probe 3 are bundled into one flow path. And a leak gas collecting chamber 4 with a pressure gauge. The chamber 4 must have a flexible structure so that the probe 3 can be fixed at an arbitrary position on one end surface of the honeycomb molded body 1. The point for mounting the inspection apparatus of this embodiment on the honeycomb molded body 1 of the object to be inspected is to prevent the pressurized gas from leaking without damaging the end surface of the product. For this reason, a soft urethane sealing material is preferably used for the portion where the end face seal plate 2, the pressurized gas supply probe 3, and the leaked gas collecting chamber 4 are in close contact with the honeycomb molded body 1.
Further, the pressurized gas is supplied from the pressurized gas supply header 6 to the pressurized gas supply probe 3 with the probe traverse device 5. The pressure of the pressurized gas is detected by the supply gas pressure detector 7 provided in the pressurized gas supply header 6, and the pressure of the leak gas from the cell is detected by the leak detection pressure gauge 8 provided in the leak gas collecting chamber 4. To be done.
【０００９】次に該検査装着を用いた検査方法について
述べる。加圧気体供給プローブ３によってある部分に圧
力Ｐ0に加圧した気体を供給し、その他の流路の漏洩気
体集合チャンバ４における漏洩検出圧力Ｐ1を調べる。
このＰ0とＰ1の圧力を測定し、基準圧力Ｐ0に対してＰ1
があるしきい値を超えることがあれば、少なくともプロ
ーブ３のセットされたセル内の流路とそれ以外のセル内
の流路が亀裂によりつながっていることを示す。同様に
プローブ３の位置をハニカム成形体１の端面の平面
（Ｘ、Ｙ軸）方向にトラバースさせながら、この操作を
繰り返すことにより、前記端面の全領域の開口を有する
セル内の亀裂の有無と、該亀裂の位置を推定することが
できる。Next, an inspection method using the inspection mounting will be described. A gas pressurized to a pressure P 0 is supplied to a certain portion by the pressurized gas supply probe 3, and the leak detection pressure P 1 in the leak gas collecting chamber 4 in the other flow paths is checked.
The pressure of the P 0 and P 1 is measured, P 1 relative to the reference pressure P 0
If a certain threshold value is exceeded, at least the flow path in the cell in which the probe 3 is set and the flow path in the other cells are connected by a crack. Similarly, while traversing the position of the probe 3 in the plane (X, Y axis) direction of the end face of the honeycomb molded body 1, by repeating this operation, the presence or absence of cracks in the cells having the opening in the entire region of the end face is determined. The position of the crack can be estimated.
【００１０】具体的な装置寸法仕様は、以下の考えに従
って決めるとよい。加圧気体供給プローブ３の大きさ
は、製品の亀裂の許容寸法によって設定する必要があ
る。すなわち、亀裂の許容寸法が小さければプローブ３
の先端を小さくする必要がある。また、プローブ３の先
端のハニカム成形体１の端面に密着する面の幅は、１セ
ルの対角線より長くなければならない。すなわち、１セ
ル内に加圧空気の供給部と漏洩気体集合チャンバ４が共
有される場合は亀裂の有無にかかわらず、該チャンバ４
での圧力が上昇するため、正確な亀裂の検出ができない
ためである。また、供給加圧気体の圧力については、ハ
ニカム成形体１の材質や亀裂の許容開口幅によって設定
すればよい。Specific device size specifications may be determined according to the following idea. The size of the pressurized gas supply probe 3 needs to be set according to the allowable size of the crack of the product. That is, if the allowable size of the crack is small, the probe 3
It is necessary to make the tip of the small. In addition, the width of the surface of the tip of the probe 3 that is in close contact with the end surface of the honeycomb molded body 1 must be longer than the diagonal line of one cell. That is, when the supply unit of the pressurized air and the leak gas collecting chamber 4 are shared in one cell, the chamber 4 is not affected by the presence or absence of cracks.
This is because the pressure at the point rises, and the crack cannot be detected accurately. The pressure of the supplied pressurized gas may be set according to the material of the honeycomb formed body 1 and the allowable opening width of cracks.
【００１１】図１に示す実施例は、供試ハニカム成形体
１として、外形１５０ｍｍ角、長さ５００ｍｍ、セルピ
ッチ３．５ｍｍ、リブ厚さ０．５ｍｍ、開口寸法３ｍｍ
角、のＴｉＯ2系脱硝触媒を対象とした。加圧気体供給
プローブ３のハニカム成形体１との接合面の寸法は３０
ｍｍ角、密着面の幅５ｍｍとし、漏洩気体集合チャンバ
４には厚さ約１ｍｍのゴムを用い、プローブ３をほぼチ
ャンバ４の中央部に位置させ、プローブ３とチャンバ４
およびチャンバ４とハニカム成形体１との接続部はバン
ド１０、１１によってシールしてある。ハニカム成形体
１の反対側の端面は機密性のウレタン材からなる端面シ
ール板２によって施栓した。In the embodiment shown in FIG. 1, the test honeycomb molded body 1 has an outer shape of 150 mm square, a length of 500 mm, a cell pitch of 3.5 mm, a rib thickness of 0.5 mm, and an opening size of 3 mm.
The target was the TiO 2 -based denitration catalyst of Kaku. The dimension of the joint surface of the pressurized gas supply probe 3 with the honeycomb formed body 1 is 30.
The leak gas collecting chamber 4 is made of rubber having a size of 1 mm and a width of 5 mm, and the leak gas collecting chamber 4 is made of rubber. The probe 3 is located substantially in the center of the chamber 4.
The connection between the chamber 4 and the honeycomb formed body 1 is sealed by the bands 10 and 11. The opposite end face of the honeycomb formed body 1 was plugged with an end face seal plate 2 made of a urethane material having airtightness.
【００１２】図２は本実施例のハニカム成形体１が健全
な場合を示し、図３はハニカム成形体１のセル流路に対
して垂直方向に亀裂がある場合の加圧気体の流れを示
し、図４はハニカム成形体１のセル流路に対して平行方
向に亀裂がある場合の加圧気体の流れを示す模式図であ
る。供給空気の圧力を１００ｍｍＡｑとし、ハニカム成
形体１の試験体を図１に示す装置によって検査した。そ
の結果、漏洩検出圧力計８で殆ど圧力が上昇せず０〜２
０ｍｍＡｑのものは、試験体を切断して内部を調べたと
ころ、亀裂がなく健全であった。漏洩検出圧力計８で最
高１００ｍｍＡｑ以上上昇するものは、流路方向に対し
て垂直方向に約φ８０ｍｍで開口幅の広い（１ｍｍ以
上）亀裂が数箇所あった。また最高１０〜１００ｍｍＡ
ｑの範囲の試験体では、ハニカム軸を通る面上に長手方
向に長さ１００ｍｍで幅１００ｍｍ程度の開口幅の狭い
亀裂（ヘアクラック）や、流路方向に対して垂直方向に
開口幅の狭い亀裂が検出された。FIG. 2 shows the case where the honeycomb formed body 1 of this embodiment is sound, and FIG. 3 shows the flow of the pressurized gas when there is a crack in the direction perpendicular to the cell flow path of the honeycomb formed body 1. FIG. 4 is a schematic diagram showing the flow of the pressurized gas when there is a crack in the direction parallel to the cell channels of the honeycomb formed body 1. The pressure of the supply air was set to 100 mmAq, and the test body of the honeycomb formed body 1 was inspected by the apparatus shown in FIG. As a result, the leak detection pressure gauge 8 hardly raises the pressure 0 to 2
Regarding 0 mmAq, when the inside of the specimen was cut and examined, it was sound without cracks. In the leak detection pressure gauge 8 that increased by 100 mmAq or more at the maximum, there were several cracks with a wide opening width (1 mm or more) of about φ80 mm in the direction perpendicular to the flow path direction. Also, the maximum is 10 to 100 mmA.
In the test body in the range of q, a crack (hair crack) having a narrow opening width of about 100 mm and a width of about 100 mm on the surface passing through the honeycomb axis, or a narrow opening width in the direction perpendicular to the flow channel direction. A crack was detected.
【００１３】本装置によって供給圧力１００ｍｍＡｑ、
漏洩検出圧力計８の敷居値を２０ｍｍＡｑとして、内部
亀裂の有無を判定することができた。上記実施例の装置
の加圧気体の供給流量と漏洩気体集合チャンバ４からの
流量を測定する装置７、８をそれぞれ取付け、両者の流
量測定値により亀裂の有無の検査を行ったが、前記加圧
気体の圧力値を測定する場合と同様に亀裂の有無の検査
が可能であることが分かった。With this device, the supply pressure is 100 mmAq,
With the threshold value of the leak detection pressure gauge 8 set to 20 mmAq, the presence or absence of internal cracks could be determined. The devices 7 and 8 for measuring the supply flow rate of the pressurized gas and the flow rate from the leaking gas collecting chamber 4 of the apparatus of the above-mentioned embodiment were respectively attached, and the presence or absence of cracks was inspected by the flow rate measurement values of both. It was found that it is possible to inspect for cracks as in the case of measuring the pressure value of the pressurized gas.
【００１４】[0014]
【発明の効果】本発明のハニカム成形体の欠陥検出器を
用いると、ハニカム成形体の内部に存在する流路方向に
平行な亀裂や垂直方向の亀裂を簡便に発見することがで
きる。特に長尺物のハニカム成形体の品質管理に大きな
効果を発揮する。このハニカム成形体の検査により、輸
送時や実機での使用時の破壊を事前に防止することがで
きる。By using the defect detector for a honeycomb molded body of the present invention, it is possible to easily find a crack existing inside the honeycomb molded body in parallel to the flow channel direction or in a vertical direction. In particular, it exerts a great effect on the quality control of a honeycomb molded body of a long product. By inspecting the honeycomb formed body, it is possible to prevent damage in advance during transportation or use in an actual machine.
【図１】 本発明の一実施例によるハニカム成形体の欠
陥検出器を示す図である。FIG. 1 is a view showing a defect detector of a honeycomb formed body according to an embodiment of the present invention.
【図２】 本発明に係りハニカム成形体が健全な場合を
示す模式図である。[Fig. 2] Fig. 2 is a schematic view showing a case where the honeycomb formed body according to the present invention is sound.
【図３】 本発明に係りハニカム成形体のセル流路に対
して垂直方向に亀裂がある場合の加圧気体の流れを示す
模式図である。[Fig. 3] Fig. 3 is a schematic diagram showing a flow of a pressurized gas when there is a crack in a direction perpendicular to a cell channel of a honeycomb formed body according to the present invention.
【図４】 本発明に係りハニカム成形体のセル流路に対
して平行方向に亀裂がある場合の加圧気体の流れを示す
模式図である。[Fig. 4] Fig. 4 is a schematic diagram showing a flow of a pressurized gas when there is a crack in a direction parallel to a cell channel of a honeycomb formed body according to the present invention.
１…ハニカム成形体、２…端面シール板、３…加圧気体
供給プローブ、４…圧力計付き漏洩気体集合チャンバ、
５…プローブトラバース装置、６…加圧気体供給ヘッ
ダ、７…供給気体圧力検出器、８…漏洩検出圧力計、９
…検査台、１０、１１…バンドDESCRIPTION OF SYMBOLS 1 ... Honeycomb molded body, 2 ... End face seal plate, 3 ... Pressurized gas supply probe, 4 ... Leakage gas collecting chamber with a pressure gauge,
5 ... Probe traverse device, 6 ... Pressurized gas supply header, 7 ... Supply gas pressure detector, 8 ... Leakage detection pressure gauge, 9
… Inspection table, 10, 11… Band
Claims (3)
もしくは複数個のセルに気体を流入させ、該セル以外か
らの該気体の漏洩の有無を調べることにより、セル内在
欠陥を検出することを特徴とするハニカム成形体の欠陥
検出方法。1. A cell internal defect is detected by injecting a gas into one or a plurality of cells in a cell group on the end face of a honeycomb formed body and checking for the presence of leakage of the gas from other than the cells. A method for detecting defects in a honeycomb formed body, comprising:
のうち１個もしくは複数個のセル内の気体圧力または気
体流量と、該セル以外からの該気体の圧力または気体流
量の比較で漏洩の有無を調べることを特徴とする請求項
１記載のハニカム成形体の欠陥検出方法。2. A cell internal defect is a leakage caused by comparing the gas pressure or gas flow rate in one or more cells of a cell group into which gas is introduced with the pressure or gas flow rate of the gas from other than the cell. The method for detecting defects in a honeycomb formed body according to claim 1, wherein the presence or absence is checked.
端面シール部材と、反対側端面のセル群の内、１個もし
くは複数個のセルに気体を流入させる気体供給部材と、
該セル以外の前記反対側端面を覆う漏洩気体検出用のチ
ャンバと、気体供給部材および漏洩気体検出用チャンバ
とに設けた圧力計もしくは流量計とからなることを特徴
とするハニカム成形体の欠陥検出装置。3. An end face seal member for plugging one end face of a honeycomb formed body, and a gas supply member for letting gas flow into one or more cells of a cell group on the opposite end face.
Defect detection of a honeycomb formed body, which comprises a chamber for detecting a leaked gas that covers the opposite end surface other than the cells, and a pressure gauge or a flowmeter provided in the gas supply member and the leaked gas detection chamber. apparatus.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25796594A JP3452660B2 (en) | 1994-10-24 | 1994-10-24 | Method and apparatus for detecting defects of honeycomb formed body |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP25796594A JP3452660B2 (en) | 1994-10-24 | 1994-10-24 | Method and apparatus for detecting defects of honeycomb formed body |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08122196A true JPH08122196A (en) | 1996-05-17 |
| JP3452660B2 JP3452660B2 (en) | 2003-09-29 |
Family
ID=17313678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP25796594A Expired - Fee Related JP3452660B2 (en) | 1994-10-24 | 1994-10-24 | Method and apparatus for detecting defects of honeycomb formed body |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3452660B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012101469A (en) * | 2010-11-11 | 2012-05-31 | Sumitomo Chemical Co Ltd | Method of and device for inspecting honeycomb structure |
| CN108896251A (en) * | 2018-05-15 | 2018-11-27 | 安徽万朗磁塑股份有限公司 | A kind of refrigerator door seal air-tightness detection device and method |
| JP2020165714A (en) * | 2019-03-28 | 2020-10-08 | 日立グローバルライフソリューションズ株式会社 | Sealability inspection method and sealability inspection system |
-
1994
- 1994-10-24 JP JP25796594A patent/JP3452660B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2012101469A (en) * | 2010-11-11 | 2012-05-31 | Sumitomo Chemical Co Ltd | Method of and device for inspecting honeycomb structure |
| CN108896251A (en) * | 2018-05-15 | 2018-11-27 | 安徽万朗磁塑股份有限公司 | A kind of refrigerator door seal air-tightness detection device and method |
| JP2020165714A (en) * | 2019-03-28 | 2020-10-08 | 日立グローバルライフソリューションズ株式会社 | Sealability inspection method and sealability inspection system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3452660B2 (en) | 2003-09-29 |
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