JP2608599B2 - Manufacturing method of ceramic honeycomb structure - Google Patents
Manufacturing method of ceramic honeycomb structureInfo
- Publication number
- JP2608599B2 JP2608599B2 JP1025637A JP2563789A JP2608599B2 JP 2608599 B2 JP2608599 B2 JP 2608599B2 JP 1025637 A JP1025637 A JP 1025637A JP 2563789 A JP2563789 A JP 2563789A JP 2608599 B2 JP2608599 B2 JP 2608599B2
- Authority
- JP
- Japan
- Prior art keywords
- honeycomb structure
- hole
- ceramic honeycomb
- manufacturing
- ceramic
- 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
- 239000000919 ceramic Substances 0.000 title claims description 25
- 238000004519 manufacturing process Methods 0.000 title claims description 10
- 230000002093 peripheral effect Effects 0.000 claims description 14
- 238000000034 method Methods 0.000 claims description 12
- 238000001125 extrusion Methods 0.000 claims description 11
- 239000003054 catalyst Substances 0.000 claims description 10
- 239000000463 material Substances 0.000 description 12
- 238000012360 testing method Methods 0.000 description 9
- 229910000831 Steel Inorganic materials 0.000 description 8
- 239000010959 steel Substances 0.000 description 8
- 239000007789 gas Substances 0.000 description 7
- 229910052878 cordierite Inorganic materials 0.000 description 6
- 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 6
- 238000005192 partition Methods 0.000 description 6
- 230000000052 comparative effect Effects 0.000 description 5
- 239000011247 coating layer Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000009924 canning Methods 0.000 description 3
- 230000003197 catalytic effect Effects 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 239000003566 sealing material Substances 0.000 description 3
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 2
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 description 2
- 210000004027 cell Anatomy 0.000 description 2
- 210000002421 cell wall Anatomy 0.000 description 2
- 238000010304 firing Methods 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 239000010970 precious metal Substances 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 230000001877 deodorizing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000011056 performance test Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 239000001294 propane Substances 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2803—Construction of catalytic reactors characterised by structure, by material or by manufacturing of catalyst support
- F01N3/2825—Ceramics
- F01N3/2828—Ceramic multi-channel monoliths, e.g. honeycombs
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01N—GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR MACHINES OR ENGINES IN GENERAL; GAS-FLOW SILENCERS OR EXHAUST APPARATUS FOR INTERNAL COMBUSTION ENGINES
- F01N3/00—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust
- F01N3/08—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous
- F01N3/10—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust
- F01N3/24—Exhaust or silencing apparatus having means for purifying, rendering innocuous, or otherwise treating exhaust for rendering innocuous by thermal or catalytic conversion of noxious components of exhaust characterised by constructional aspects of converting apparatus
- F01N3/28—Construction of catalytic reactors
- F01N3/2839—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration
- F01N3/2842—Arrangements for mounting catalyst support in housing, e.g. with means for compensating thermal expansion or vibration specially adapted for monolithic supports, e.g. of honeycomb type
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Ceramic Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
- Laminated Bodies (AREA)
- Catalysts (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、内燃機関の排ガス浄化用触媒および微粒子
浄化用フィルタ、各種ガス・石油を燃料とする燃焼ガス
の浄化および／または脱臭用触媒の担体として用いられ
るセラミックハニカム構造体の製造法に関するものであ
る。The present invention relates to a catalyst for purifying exhaust gas of an internal combustion engine, a filter for purifying fine particles, and a catalyst for purifying and / or deodorizing a combustion gas using various gases and petroleum as fuel. The present invention relates to a method for manufacturing a ceramic honeycomb structure used as a carrier.
（従来の技術） 従来、一般に実用されている自動車搭載触媒コンバー
タは、使用中の激しい振動に耐えるように第４図の如
く、排気ガスが通過する貫通孔11−1,11−２と直角方向
（以下「径方向」という）にはクッション性のある支持
材12−１〜12−３（以下クッション材という）を介して
圧力を加え、更に貫通孔方向には、クッション材12−１
を介して圧力を加えるかまたは直接板材13で位置を固定
し支持した構造をとっている。(Prior Art) Conventionally, a catalytic converter mounted on an automobile is generally used in a direction perpendicular to the through holes 11-1 and 11-2 through which exhaust gas passes as shown in FIG. 4 so as to withstand severe vibration during use. (Hereinafter referred to as “radial direction”), pressure is applied through support materials 12-1 to 12-3 (hereinafter referred to as “cushion material”) having cushioning properties, and further, cushion material 12-1 is applied in the direction of the through hole.
The structure is such that the position is fixed by the plate material 13 or the position is fixed directly by the plate material 13 and supported.
しかしながら、上記構造の場合、貫通孔方向に当接さ
れたクッション材部分のハニカム構造体の貫通孔11−２
には排気ガスが通過できずその部分の触媒が無駄とな
る。そのため、第５図に示すように触媒貴金属の節約を
目的にセラミックマット等のクッション性のあるシール
材14（以下シール材という）のみを全側面に用い径方向
のみで支持する方法も一部で実用化されている。However, in the case of the above structure, the through-hole 11-2 of the honeycomb structure of the cushion material portion abutted in the through-hole direction.
Exhaust gas cannot pass through, and the catalyst in that portion is wasted. For this reason, as shown in FIG. 5, there is also a method of using only a sealing material 14 having a cushioning property such as a ceramic mat (hereinafter referred to as a sealing material) on all sides and supporting only in a radial direction in order to save precious metal catalysts. Has been put to practical use.
また、実開昭50−27220号公報で開示されているよう
に、セラミックハニカム構造体の軸方向の滑り止めのた
め、ハニカム構造体外周面に貫通孔方向に凹凸である被
覆層を形成したセラミックハニカム構造体も知られてい
る。In addition, as disclosed in Japanese Utility Model Laid-Open No. 50-22020, in order to prevent the ceramic honeycomb structure from slipping in the axial direction, a ceramic layer having a coating layer that is uneven in the direction of a through hole is formed on the outer peripheral surface of the honeycomb structure. Honeycomb structures are also known.
さらに、実開昭54−82215号公報では、セラミックハ
ニカム構造体の軸方向の滑り止めのため、ハニカム構造
体外周面を貫通孔に垂直に凹部を形成したセラミックハ
ニカム構造体も開示されている。Further, Japanese Utility Model Application Laid-Open No. 54-82215 discloses a ceramic honeycomb structure in which a concave portion is formed on the outer peripheral surface of the honeycomb structure perpendicular to a through hole in order to prevent the ceramic honeycomb structure from slipping in the axial direction.
（発明が解決しようとする課題） ところが、一部で実用化されている径方向のみで支持
する方法は、使用中の激しい振動によって触媒が貫通孔
方向にズレないよう径方向に加える圧力を高くしなけれ
ばならないため、セラミックハニカム構造体の隔壁の厚
さが例えば0.25〜0.3mmというような比較的厚く外圧強
度が高い場合には径方向のみの支持が可能であるが、隔
壁の厚さが例えば0.15〜0.20mmというような比較的薄い
場合には外圧強度が低く適用できない問題があった。(Problems to be Solved by the Invention) However, the method of supporting only in the radial direction, which is partially put into practical use, requires increasing the pressure applied in the radial direction so that the catalyst does not shift in the direction of the through-hole due to intense vibration during use. Therefore, when the thickness of the partition wall of the ceramic honeycomb structure is relatively thick such as 0.25 to 0.3 mm and the external pressure strength is high, it is possible to support only in the radial direction, but the thickness of the partition wall is small. For example, when the thickness is relatively thin, for example, 0.15 to 0.20 mm, there is a problem that the external pressure strength is too low to be applied.
実開昭50−27220号の公報に開示された技術では、広
く一般に用いられているコージエライト材料を用いた押
し出し製法によるハニカム構造体では、本体と外周面に
形成した貫通孔方向に凹凸である被覆層との熱膨脹を同
一レベルにできないため、被覆層が剥離したり被覆層に
クラックが入るという問題が、また被覆層を設けるため
の工程が増加するためコスト高になるという問題があっ
た。In the technique disclosed in Japanese Utility Model Publication No. 50-27220, a honeycomb structure formed by extrusion using a widely used cordierite material has a coating having irregularities in the direction of a through hole formed in a main body and an outer peripheral surface. Since the thermal expansion with the layer cannot be at the same level, there is a problem that the coating layer is peeled off or cracks are formed in the coating layer, and there is a problem that the cost is increased due to an increase in the number of steps for providing the coating layer.
また、実開昭54−82215号の公報に開示された技術で
は、凸形状の係止部はその製造方法が記載されていない
が、上述の実開昭50−27220号と同様にハニカム構造体
押し出し後形成する場合上述の実開昭50−27220号と同
様な問題があり、また凹ませた場合には凹ませた深さに
相当するハニカム構造体の外周部には排気ガスが通過で
きないため触媒が無駄になるという問題があった。Further, in the technique disclosed in Japanese Utility Model Application Laid-Open No. 54-82215, the method of manufacturing the convex locking portion is not described, but the honeycomb structure is similar to the above-described Japanese Utility Model Application No. 50-27220. In the case of forming after extrusion, there is a problem similar to that of Japanese Utility Model Application Laid-Open No. 50-22720, and in the case of being recessed, exhaust gas cannot pass through the outer peripheral portion of the honeycomb structure corresponding to the recessed depth. There was a problem that the catalyst wasted.
本発明の目的は上述した課題を解消して、例えば触媒
コンバータとして使用した際のハニカム構造体の貫通孔
方向のズレを安価かつ確実に防止した支持を可能とする
セラミックハニカム構造体の製造方法を提供しようとす
るものである。An object of the present invention is to solve the above-mentioned problems, and to provide a method for manufacturing a ceramic honeycomb structure that enables, for example, a low-cost and reliable prevention of misalignment of a honeycomb structure in a through-hole direction when used as a catalytic converter. It is something to offer.
（課題を解決するための手段） 本発明のセラミックハニカム構造体の製造法は、触媒
担体用のセラミックハニカム構造体の押し出しによる製
造法において、押し出し直後に押し出し方向に振動を与
え、貫通孔に垂直な断面における外壁を含む外周部のみ
貫通孔方向の断面において貫通孔方向に凹凸形状を有す
るハニカム構造体を得ることを特徴とするものである。(Means for Solving the Problems) According to a method for manufacturing a ceramic honeycomb structure of the present invention by extruding a ceramic honeycomb structure for a catalyst carrier, vibration is applied in the extrusion direction immediately after the extrusion, so that the ceramic honeycomb structure is perpendicular to the through hole. The present invention is characterized in that a honeycomb structure having a concavo-convex shape in a through-hole direction only in an outer peripheral portion including an outer wall in a simple cross-section in a through-hole direction is obtained.
（作 用） 上述した構成において、セラミックハニカム構造体の
貫通孔に垂直な断面の外壁を含む外周部のみ貫通孔方向
に凹凸であるため、得られたハニカム構造体をシール材
および／またはクッション材とともにコンバータとして
組み込むとシール材および／ま、はクッション材が凹み
部にくい込むことによりハニカム構造体の支持力が高ま
り、径方向の支持のみでも貫通孔方向のズレを有効に防
止するよう作用する。(Operation) In the above-described configuration, since only the outer peripheral portion including the outer wall having a cross section perpendicular to the through hole of the ceramic honeycomb structure is uneven in the direction of the through hole, the obtained honeycomb structure is sealed and / or cushioned. In addition, when incorporated as a converter, the sealing material and / or the cushioning material is hardly inserted into the concave portion, so that the supporting force of the honeycomb structure is increased, and even if only the support in the radial direction is performed, the displacement in the direction of the through hole is effectively prevented.
そのため、従来の外周部の貫通孔に当接されていたク
ッション材部分の触媒を省略できるよう作用するので、
貴金属の無駄がなくなるとともに、触媒の体積を削減で
きるのでコンバータの体積を削減できる。For this reason, since the catalyst of the cushion material portion which has been in contact with the through hole of the conventional outer peripheral portion acts so that it can be omitted,
Precious metals are not wasted, and the volume of the catalyst can be reduced, so that the volume of the converter can be reduced.
また、本発明のセラミックハニカム構造体の製造法
は、押し出し直後に押し出し方向に振動を与えることの
みにより貫通孔に垂直な断面の外壁を含む外周部のみ貫
通孔方向に凹凸形状を有するハニカム構造体を得ること
ができるため、ハニカム構造体を安価に製造できる。Further, the method for manufacturing a ceramic honeycomb structure of the present invention is characterized in that a honeycomb structure having an irregular shape in the through-hole direction only in the outer peripheral portion including the outer wall having a cross section perpendicular to the through-hole only by applying vibration in the extrusion direction immediately after the extrusion. Therefore, the honeycomb structure can be manufactured at low cost.
（実施例） 第１図は本発明により得たハニカム構造体の一例の構
造を示す断面図である。第１図に示す実施例ではハニカ
ム構造体１の外壁２およびその内側２つのハニカム構造
体を構成するセル壁３−1,3−２まで、貫通孔方向に凹
凸であることがわかる。(Example) FIG. 1 is a sectional view showing a structure of an example of a honeycomb structure obtained according to the present invention. In the embodiment shown in FIG. 1, it can be seen that the outer wall 2 of the honeycomb structure 1 and the cell walls 3-1 and 3-2 constituting the two inner honeycomb structures have irregularities in the through hole direction.
このハニカム構造体を得るには、焼成した場合コージ
ェライトとなる原料（以下“コージェライト原料”とい
う）を押し出し成形し、押し出された直後のまだ柔らか
いハニカム構造体を押し出しながら適当な長さまで押し
出し、押し出しながらその先端端面に押し出し方向とは
逆に押し出しを阻止する程度の力で数ヘルツの振動を加
えることにより得られ、その後は一般のハニカム構造体
と同様切断し乾燥・焼成すればよい。これにより外壁お
よび外周部のみが貫通孔方向に凹凸形状のセラミックハ
ニカム構造体を得ることができる。In order to obtain this honeycomb structure, a raw material that becomes cordierite when fired (hereinafter referred to as “cordierite raw material”) is extruded and extruded to an appropriate length while extruding a soft honeycomb structure immediately after being extruded, It can be obtained by applying a vibration of several hertz to the end face of the tip while extruding it while extruding it in a direction opposite to the pushing direction, and then cutting, drying and firing like a general honeycomb structure. Thereby, it is possible to obtain a ceramic honeycomb structure in which only the outer wall and the outer peripheral portion are uneven in the through hole direction.
また、押し出しながらでなくとも、押し出された直後
のまだ柔らかいハニカム構造体を適当な長さに切断し、
両端面から貫通孔方向に圧縮するよう振動を加える方法
でも本発明品を得ることができる。In addition, even if not extruding, the still soft honeycomb structure immediately after being extruded is cut to an appropriate length,
The product of the present invention can also be obtained by a method of applying vibration so as to compress from both end surfaces in the direction of the through hole.
以下に本発明の実際の例について説明する。 Hereinafter, actual examples of the present invention will be described.
まず、第１表にしめす種々のセラミックハニカム構造
体を以下のように準備した。First, various ceramic honeycomb structures shown in Table 1 were prepared as follows.
本発明品1:コージェライト原料を20mm/秒の速度で押
し出し形成し、押し出された直後のまだ柔らかいハニカ
ム構造体をそのまま押し出しながら約50〜200cmの長さ
に保って、その先端端面を押し出し方向とは逆に押し出
しを阻止する程度の力で約４ヘルツの振動を加え、その
後圧力を加えた先端部分は切り捨てて、焼成後所定の長
さになるよう切断し乾燥・焼成し第１図にその断面図を
示すような本発明品１を得た。The present invention product 1: extruding cordierite raw material at a speed of 20 mm / sec, maintaining a length of about 50 to 200 cm while extruding the still soft honeycomb structure immediately after being extruded, and extruding the tip end face in the extruding direction. Conversely, vibration of about 4 Hz is applied with a force to prevent extrusion, then the pressure-applied tip is cut off, cut to a predetermined length after firing, dried and fired, as shown in FIG. The product 1 of the present invention as shown in the sectional view was obtained.
このハニカム構造体は、貫通孔密度62個/cm2、隔壁厚
さ0.17mm、外径100mm、全長100mmであり、また外周部の
凹凸は高さ約0.7mm、ピッチ約7mmである。This honeycomb structure has a through-hole density of 62 / cm 2 , a partition wall thickness of 0.17 mm, an outer diameter of 100 mm, and a total length of 100 mm, and the outer peripheral portion has a height of about 0.7 mm and a pitch of about 7 mm.
本発明品2:本発明品１と同様に、貫通孔密度46.5個/c
m2、隔壁厚さ0.20mm、外径100mm、全長100mmで外周部の
凹凸は本発明品１と同様のハニカム構造体を得た。Invention product 2: Same as invention product 1, through-hole density 46.5 / c
m 2, and obtained wall thickness 0.20 mm, outer diameter 100mm, the outer peripheral portion in total length 100mm irregularities similar honeycomb structure and the present invention product 1.
一方、第２図に示すような、広く一般的に用いられて
いるコージェライトのハニカム構造体15を準備した。On the other hand, as shown in FIG. 2, a cordierite honeycomb structure 15 widely used in general was prepared.
比較品1:比較品１は貫通孔密度46.5個/cm2、隔壁厚さ
0.28mm、外径100mm、全長100mmである。Comparative product 1: Comparative product 1 has a through hole density of 46.5 / cm 2 , partition wall thickness
0.28mm, outer diameter 100mm, total length 100mm.
比較品2,3:比較品2,3は、貫通孔密度46.5個/cm2、隔
壁厚さ0.2mm、外径100mm、全長100mmのハニカム構造体
である。Comparative products 2 and 3: Comparative products 2 and 3 are honeycomb structures having a through-hole density of 46.5 holes / cm 2 , a partition wall thickness of 0.2 mm, an outer diameter of 100 mm, and a total length of 100 mm.
これらの本発明品および比較品のハニカム構造体各々
２個について性能試験を実施した。その結果を第１表に
示す。A performance test was performed on each of the two honeycomb structures of the present invention product and the comparative product. Table 1 shows the results.
ここで、外圧強度試験は、ハニカム構造体の上下端面
にハニカム構造体と同一の断面形状の厚さ約0.5mmのウ
レタンシートを介して約20mmのアルミニウム板を当て、
側面を厚さ約0.5mmのウレタンチューブで包み密封し、
水を満たした圧力容器に入れ、圧力を徐々に上げて、破
壊音が生じたときの圧力を測定した。 Here, the external pressure strength test is performed by applying an aluminum plate of about 20 mm to the upper and lower end surfaces of the honeycomb structure through a urethane sheet having a thickness of about 0.5 mm having the same cross-sectional shape as the honeycomb structure,
Wrap the sides with a urethane tube of about 0.5 mm in thickness and seal,
The sample was placed in a pressure vessel filled with water, the pressure was gradually increased, and the pressure at the time of the destruction sound was measured.
キャンニング試験は、担体に保持材としてセラミック
マットを巻き、それを出口部が鋼管の入口部とほぼ同じ
内径を持ち入口部が出口部より大きい内径を持ったテー
パー状の治具の中に入れ、治具出口部を鋼管の入口部に
当てて担体を油圧ラムで鋼管の中に押し込んだ後、鋼管
から担体を押し出し外観を観察した。In the canning test, a ceramic mat was wrapped around the carrier as a holding material, and it was placed in a tapered jig whose outlet had a diameter approximately the same as the inlet of the steel pipe and whose inlet had a larger inner diameter than the outlet. After the jig outlet was brought into contact with the inlet of the steel pipe and the carrier was pushed into the steel pipe with a hydraulic ram, the carrier was extruded from the steel pipe and the appearance was observed.
セラミックマットは、厚さ4.9mmを使用し、鋼管の内
径は第１表に示したスキマｇになるように選んだ。The thickness of the ceramic mat was 4.9 mm, and the inner diameter of the steel pipe was selected so as to have the clearance g shown in Table 1.
加熱振動試験は、第３図（ａ）または（ｂ）に示すよ
うにセラミックハニカム構造体にキャニング試験と同様
なセラミックマットを巻き、第１表に示スキマｇとなる
内径の鋼管に押し込んだ後、メガホン形状のコーンをハ
ニカム構造体の入った鋼管の両端にボルトで止め試験に
供した。In the heating vibration test, as shown in FIG. 3 (a) or (b), a ceramic mat similar to that in the canning test was wound around a ceramic honeycomb structure, and after being pressed into a steel pipe having an inner diameter of the gap g shown in Table 1. Then, a megaphone-shaped cone was bolted to both ends of a steel pipe containing a honeycomb structure and subjected to a test.
試験条件は、プロパンガスバーナを加熱源とした800
℃の熱ガスを２分流し加熱した後、室温空気を２分流し
て冷却することを１サイクルとして200Hz、０〜20Gの振
動を加えながら50サイクル実施した後、コーンを外して
鋼管から担体を押し出し外観を観察した。The test conditions were 800 with a propane gas burner as the heating source.
After heating and flowing hot gas of 2 ° C for 2 minutes, cooling was performed by flowing room temperature air for 2 minutes, and the cycle was carried out for 50 cycles while applying vibration of 200 Hz and 0 to 20 G. Then, the cone was removed and the carrier was removed from the steel pipe. The extruded appearance was observed.
また、第１表にしめす試験の外に、電気炉による熱衝
撃試験を実施したところ本発明品、比較品共に850〜900
℃で差がなかった。In addition to the tests shown in Table 1, a thermal shock test using an electric furnace was performed.
There was no difference at ° C.
上記第１表の結果からわかるように、実使用条件を模
擬した加熱振動試験に耐え実用に供することができるも
のは、外圧強度が20kgf/cm2以下の比較的強度の弱いセ
ラミックハニカム構造体の場合には本発明品および従来
品を緩い圧力でキャンニングし貫通孔方向にも保持した
ものであり、従来品を貫通孔方向に保持しない側面のみ
で保持する場合には外圧強度が50kgf/cm2以上の強い強
度のハニカム構造体を強い圧力でキャンニングしたとき
である。As can be seen from the results in Table 1 above, those that can withstand the heating vibration test simulating actual use conditions and can be used for practical use are those of the relatively weak ceramic honeycomb structure having an external pressure strength of 20 kgf / cm 2 or less. In this case, the product of the present invention and the conventional product are canned with a gentle pressure and held in the direction of the through hole, and when the conventional product is held only on the side that is not held in the direction of the through hole, the external pressure strength is 50 kgf / cm. This is when a honeycomb structure having two or more strong strengths is canned with strong pressure.
従って、本発明品は隔壁厚さが薄く機械的強度が弱い
ハニカム構造体にも側面のみで緩く保持でき、従来の圧
力を高くキャンニングする方法または貫通孔方向にも保
持する方法と同様の有効性であることが確認できる。Therefore, the product of the present invention can be held loosely only on the side surface even in a honeycomb structure having a small partition wall thickness and low mechanical strength, and has the same effectiveness as the conventional method of canning at a high pressure or holding in the through hole direction. Can be confirmed.
本発明は上述した実施例にのみ限定されるものではな
く、幾多の変形，変更が可能である。例えば、本発明品
の凹凸の高さおよびピッチは振動の条件によって変える
ことができ、又凹凸の高さの必要性は使用条件によって
変わる設計事項である。The present invention is not limited to the above-described embodiment, and various modifications and changes are possible. For example, the height and pitch of the unevenness of the product of the present invention can be changed depending on the conditions of vibration, and the necessity of the height of the unevenness is a design item that changes depending on the use conditions.
また本実施例では、セラミックハニカム構造体の径方
法の断面形状を正円のものを用いたがこれに限定される
ことなく、例えば楕円形状、四角形状、その他非対称形
状のものでもよい。さらに、セルの形状は、本実施例で
は正方形であるがこれに限定するものではなく三角形、
六角形でもよい。なお、材質についても、本実施例では
コージェライトを用いたがこれに限定するものではな
く、構造についてもセルの両端面を交互に目封じしたハ
ニカム構造体へ適用も可能である。In this embodiment, the cross-sectional shape of the ceramic honeycomb structure in the diameter method is a perfect circle, but the shape is not limited to this, and may be, for example, an elliptical shape, a square shape, or another asymmetric shape. Further, the shape of the cell is square in the present embodiment, but is not limited to this, and is triangular,
It may be hexagonal. In this embodiment, cordierite is used for the material, but the material is not limited to this, and the structure can be applied to a honeycomb structure in which both end faces of the cell are alternately plugged.
（発明の効果） 以上詳細に説明したところから明らかなように、本発
明のセラミックハニカム構造体の製造法は、押し出し直
後に押し出し方向に振動を与えることのみにより貫通孔
に垂直な断面における外壁を含む外周部のみ貫通孔方向
に凹凸形状を有するハニカム構造体を容易に得ることが
できるため、工程を大幅に増やすことなく安価に製造で
きる。(Effects of the Invention) As is clear from the above description, the method for manufacturing a ceramic honeycomb structure of the present invention provides an outer wall in a cross section perpendicular to a through-hole only by applying vibration in the extrusion direction immediately after extrusion. Since it is possible to easily obtain a honeycomb structure having irregularities in the through hole direction only in the outer peripheral portion including the outer peripheral portion, it is possible to manufacture the honeycomb structure at a low cost without significantly increasing the number of steps.
第１図は本発明品のハニカム構造体の一例の構成を示す
断面図、 第２図は比較品のハニカム構造体の一例の構成を示す斜
視図、 第３図（ａ），（ｂ）はそれぞれ本実施例において使用
したハニカム構造体を試験したコンバーターの構成を示
す断面図、 第４図および第５図は従来の触媒コンバーターの一例を
示す断面図である。 １……ハニカム構造体、２……外壁 ３−1,3−２……セル壁FIG. 1 is a cross-sectional view showing an example of a configuration of a honeycomb structure of the present invention, FIG. 2 is a perspective view showing a configuration of an example of a honeycomb structure of a comparison product, and FIGS. FIG. 4 is a cross-sectional view showing a configuration of a converter in which a honeycomb structure used in this example was tested. FIGS. 4 and 5 are cross-sectional views showing an example of a conventional catalytic converter. 1. Honeycomb structure 2. External wall 3-1, 3-2 Cell wall
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭54−25321（ＪＰ，Ａ) 実開 昭50−109013（ＪＰ，Ｕ) 実開 昭50−27220（ＪＰ，Ｕ) 実開 昭54−82215（ＪＰ，Ｕ) ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-54-25321 (JP, A) JP-A 50-1009013 (JP, U) JP-A 50-27220 (JP, U) JP-A Sho 54- 82215 (JP, U)
Claims (1)
押し出しによる製造法において、押し出し直後に押し出
し方向に振動を与え、貫通孔に垂直な断面における外壁
を含む外周部のみ貫通孔方向の断面において貫通孔方向
に凹凸形状を有するハニカム構造体を得ることを特徴と
するセラミックハニカム構造体の製造法。In a manufacturing method by extruding a ceramic honeycomb structure for a catalyst carrier, vibration is applied in an extrusion direction immediately after extrusion, and only an outer peripheral portion including an outer wall in a cross section perpendicular to the through hole is penetrated in a cross section in a through hole direction. A method for manufacturing a ceramic honeycomb structure, comprising obtaining a honeycomb structure having an uneven shape in a hole direction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1025637A JP2608599B2 (en) | 1989-02-06 | 1989-02-06 | Manufacturing method of ceramic honeycomb structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1025637A JP2608599B2 (en) | 1989-02-06 | 1989-02-06 | Manufacturing method of ceramic honeycomb structure |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02207846A JPH02207846A (en) | 1990-08-17 |
| JP2608599B2 true JP2608599B2 (en) | 1997-05-07 |
Family
ID=12171368
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1025637A Expired - Lifetime JP2608599B2 (en) | 1989-02-06 | 1989-02-06 | Manufacturing method of ceramic honeycomb structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2608599B2 (en) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2613729B2 (en) * | 1992-01-30 | 1997-05-28 | 日本碍子株式会社 | Ceramic honeycomb structure, method of manufacturing the same, and coating material therefor |
| US6764743B2 (en) | 2001-05-01 | 2004-07-20 | Ngk Insulators, Ltd. | Porous honeycomb structure and process for production thereof |
| KR100637298B1 (en) * | 2004-04-05 | 2006-10-24 | 이비덴 가부시키가이샤 | Honeycomb structural body, manufacturing method of the honeycomb structural body, and exhaust gas purifying device |
| WO2006137151A1 (en) | 2005-06-24 | 2006-12-28 | Ibiden Co., Ltd. | Honeycomb structure and exhaust gas purifier |
| CN100534617C (en) | 2005-06-24 | 2009-09-02 | 揖斐电株式会社 | Honeycomb structure body |
| JP2013024221A (en) * | 2011-07-26 | 2013-02-04 | Ngk Insulators Ltd | Honeycomb structure, honeycomb catalyst body, and exhaust gas processor |
| JP5958567B2 (en) * | 2014-03-05 | 2016-08-02 | 株式会社デンソー | Honeycomb structure |
| JP6920451B2 (en) * | 2017-09-27 | 2021-08-18 | 京セラ株式会社 | Measuring device parts |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5027220U (en) * | 1973-07-05 | 1975-03-28 | ||
| JPS50109013U (en) * | 1974-02-18 | 1975-09-06 | ||
| DE2733640C3 (en) * | 1977-07-26 | 1981-04-30 | Süddeutsche Kühlerfabrik Julius Fr. Behr GmbH & Co KG, 7000 Stuttgart | Matrix for a catalytic reactor for exhaust gas cleaning in internal combustion engines |
| JPS5482215U (en) * | 1977-11-21 | 1979-06-11 |
-
1989
- 1989-02-06 JP JP1025637A patent/JP2608599B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH02207846A (en) | 1990-08-17 |
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