EP0945195B1 - Molding roll for metal thin plate as catalyst carrier - Google Patents
Molding roll for metal thin plate as catalyst carrier Download PDFInfo
- Publication number
- EP0945195B1 EP0945195B1 EP19990302246 EP99302246A EP0945195B1 EP 0945195 B1 EP0945195 B1 EP 0945195B1 EP 19990302246 EP19990302246 EP 19990302246 EP 99302246 A EP99302246 A EP 99302246A EP 0945195 B1 EP0945195 B1 EP 0945195B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- portions
- roll
- ridge
- root
- blades
- 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
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Classifications
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- 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
- F01N13/00—Exhaust or silencing apparatus characterised by constructional features ; Exhaust or silencing apparatus, or parts thereof, having pertinent characteristics not provided for in, or of interest apart from, groups F01N1/00 - F01N5/00, F01N9/00, F01N11/00
- F01N13/18—Construction facilitating manufacture, assembly, or disassembly
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D13/00—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form
- B21D13/04—Corrugating sheet metal, rods or profiles; Bending sheet metal, rods or profiles into wave form by rolling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D31/00—Other methods for working sheet metal, metal tubes, metal profiles
- B21D31/04—Expanding other than provided for in groups B21D1/00 - B21D28/00, e.g. for making expanded metal
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- 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
- F01N3/2807—Metal other than sintered metal
- F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
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- 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
- F01N2330/00—Structure of catalyst support or particle filter
- F01N2330/30—Honeycomb supports characterised by their structural details
- F01N2330/38—Honeycomb supports characterised by their structural details flow channels with means to enhance flow mixing,(e.g. protrusions or projections)
Definitions
- the present invention relates to a molding roll for molding a metal thin plate as a catalyst carrier employed in a metallic catalyst converter.
- the former metallic catalyst converter in which the corrugated metal thin plates and the flat metal thin plates are laminated alternately is disadvantageous in cost since two types of metal thin plates are needed. This increases the forming step of the honeycomb carrier as well as the forming step and the managing step of the metal thin plates.
- US-A-4 297 866 discloses a molding roll for molding metal strip to produce slit segments of meshes.
- the molded metal strip comprises a series of first elongate regions that comprise first convex portions separated by first planar portions and second elongate regions that comprise second concave portions separated by second planar portions.
- the convex portions and concave portions being side-by-side such that the planar portions define planar strips extending perpendicular to the lengthways direction of the first and second elongate regions.
- the molding roll of US-A-4 297 866 comprises a series of axially aligned plate-like blades having a circumferentially extending forming surface comprising alternating relatively flat equi-spaced portions for producing the first and second planar portions and convex portions for producing the first convex portions and second concave portions.
- the first convex portions and second concave portions have the same length and the series of blades are set at the same angle with respect to one another.
- the invention provides a molding roll for molding a thin metal plate employed as a catalyst carrier, the thin metal plate including first elongate regions having first convex portions and first concave portions and second elongate regions having second concave portions and second convex portions, the first elongate regions and the second elongate regions being disposed alternately in a direction perpendicular to the length thereof, the first convex portions and first concave portions being arranged alternately along the length of the first elongate regions with cuts being provided between adjacent first convex portions and first concave portions and the second concave portions and the second convex portions being arranged alternately along the length of the second elongate regions with cuts being provided between adjacent second concave portions and second convex portions, the molding roll comprising:
- the forming regions of each blade comprise the same pattern which is defined by the roll ridge portions and the roll root portions.
- the roll ridge portions and the roll root portions of each first row are positioned irregularly with respect to the roll ridge portions and roll root portions of other first rows and the roll ridge portions and roll root portions of each second row are positioned irregularly with respect to the roll ridge portions and roll root portions of the other second rows.
- the molding roll further comprises:
- the molding roll further comprises a stopper plate placed between one of the first flange and the second flange and the blade that is positioned adjacent the one of the first flange and the second flange, the stopper plate being arranged to engage with a partner roll of the molding roll to suppress axial displacement of the molding roll with respect to the partner roll.
- FIGS. 9, 10 show a metallic catalyst carrier 1 including a metallic catalyst carrier 3 which employs metal thin plate 5 molded by a molding roll.
- the metallic catalyst carrier 3 is arranged in a metal outer cylinder 2 which is formed to have an elliptic sectional shape (including an ellipse).
- Diffusers 4 provided at each end of the outer cylinder 2 are separately formed.
- the diffusers 4 are fitted into both ends of the outer cylinder 2 and then fixed thereto.
- the metallic catalyst carrier 3 is formed by coating a binder, which is formed of alumina called a "wash coat", on a honeycomb carrier 3a as a base body, and then applying catalysts such as Pt, etc. on a surface of the binder.
- the honeycomb carrier 3a is constructed by folding the metal thin plate 5, which is formed of stainless steel, etc. and is corrugated, successively like the S-shape along the corrugation direction and then laminating them like a honeycomb to thus form cells at respective laminated portions.
- the honeycomb carrier 3a may be constructed by laminating plural sheets of the metal thin plates 5 being cut up into desired lengths, otherwise the honeycomb carrier 3a may be constructed by winding the metal thin plate 5 to be laminated.
- FIGS.5, 6 A standard corrugation pattern of the metal thin plate 5 which is corrugated is shown in FIGS.5, 6.
- the metal thin plate 5 will be explained with reference to a basic profile of a corrugated metal thin plate 5' of this type shown in FIG.7.
- the corrugated metal thin plate 5' of this type shown in FIG.7 has ridge portions 5'a and root portions 5'b acting as standard corrugations.
- the ridge portions 5'a and the root portions 5'b of this corrugated metal thin plate 5' are aligned alternately in sequence in the corrugation direction x (referred to as an "x direction” hereinafter).
- Flat rack portions 5'f are then provided successively at respective center positions of slant walls 5'c, which define the ridge portions 5'a and the root portions 5'b.
- the flat rack portions 5'f extend in the corrugation folded direction y (referred to as a "y direction” hereinafter).
- ridge portions 5'a as their stop ends, a plurality of ridge portion depressions 5'd which project in the opposite direction are provided along the ridge portions 5a' of the corrugation at a constant distance along the y direction.
- a plurality of root portion ridges 5'e which project in the opposite direction are provided along the root portions 5'b of the corrugation at a constant distance along the y direction.
- the ridge portions 5'a and the root portions 5'b are aligned via the rack portions 5'f alternately in sequence along the x direction, and a plurality of the ridge portion depression 5'd are provided to the ridge portions 5'a at a constant distance regularly along the y direction and also a plurality of root portion ridges 5'e are provided to the root portions 5'b at a constant distance regularly along the y direction.
- the corrugated metal thin plate 5' shown in FIG.7 constitutes a uniform corrugation pattern in total as described above, whereas the metal thin plate 5 has a certain regularity but constitutes a nonuniform corrugation pattern in total.
- the metal thin plate 5 shown in FIGS.5, 6 has the ridge portions 5a and the root portions 5b of the corrugation as basic profiles, like the metal thin plate 5' shown in FIG.7.
- a plurality of ridge portion depressions 5d which project from the center position of the slant walls 5c constituting the ridge portions 5a and the root portions 5b in the opposite direction to the ridge portions 5a, are provided to the corrugated ridge portions 5a at a constant distance along the y direction, using the rack portions 5f being provided at the above center positions as the side ends.
- a plurality of root portion ridges 5e which project in the opposite direction to the root portions 5b, are provided to the corrugated root portions 5b at a constant distance along the y direction.
- the metal thin plate 5 is formed by using a molding roll 10 shown in FIGS. 1 to 4.
- FIG.1 is a perspective view showing a molding roll 10 according to an embodiment of the invention.
- FIG.2 is an exploded view showing the molding roll 10.
- FIG.3 is a side view showing a blade 11 of a plurality of blades used to form the molding roll 10.
- FIG.4 is a fragmentary enlarged view showing the blade 11 in FIG.3.
- the molding roll 10 is constructed by laminating a plurality of sheets of blades 11 which are formed under the same standard and have roll ridge portions 10a, 10e (see FIG.4) and roll root portions 10b, 10d (see FIG.4) formed on their peripheral surfaces.
- These roll ridge portions 10a, 10e correspond to the ridge portions 5a and the root portion ridges 5e of the corrugation of the metal thin plate 5.
- the roll root portions 10b, 10d correspond to the root portions 5b and the ridge portion depressions 5d of the metal thin plate 5.
- the roll ridge portions 10a, 10e and the roll root portions 10b, 10d of the blade 11 are formed to have a predetermined assignment angles ⁇ with respect to a blade center point O in this embodiment, respective contiguous numbers of the roll ridge portions 10a, 10e and the roll root portions 10b, 10d, which are adjacent along the peripheral direction of the blade 11, are set to not more than two.
- Almost flat rack portions 1 0f which partition the roll ridge portion 10a and the roll root portion 10b, or the roll ridge portion 10a and the roll ridge portion 10e, or the roll root portion 10b and the roll root portion 10d, both being adjacent along the peripheral direction, are formed on a pitch circle PC which partitions the roll ridge portions 10a and the roll root portions 10b of the blade 11.
- the roll ridge portion 10a and the roll ridge portion 10e which respectively correspond to a convex portion being assumed as the ridge portion 5a of the metal thin plate 5 and a convex portion being assumed as the root portion ridge 5e respectively are formed as convex portions on the pitch circle PC, while the roll root portion 10b and the roll root portion 10d respectively correspond to a concave portion being assumed as the root portion 5b of the metal thin plate 5 and a concave portion being assumed as the ridge portion 5d are formed as concave portions on the pitch circle PC.
- Plural sheets of blades 11 are inserted onto a cylindrical axis portion 13 of a holder 12, on one end of which a flange 14 is formed as shown in FIG.2, and laminated, as will be described later.
- a flange 15 is then inserted onto the other end of the cylindrical axis portion 13 to put the blades 11 between the flanges 14, 15.
- the blades 11 are then positioned by press-fitting a plurality of locating pins 16 through the flanges 14, 15 and the plural sheets of blades 11.
- the blades 11 are then compressed and fixed by fastening members which consist of bolts 17 that pass through the flanges 14, 15 and the blades 11 and engage internal threads 18 being provided in the flange 14.
- a plurality of pin insertion holes 20 and a plurality of bolt insertion holes 21 as well as a center hole 19 into which the axis portion 13 of the holder 12 is inserted are formed symmetrically around the blade center point O.
- Some of the blades 11 are shifted by an integral multiple of a formation distance (pitch angle) ⁇ between the roll ridge portions 10a, 10e and the roll root portions 10b, 10d on the peripheral surface, and then laminated.
- the blades 11 have the pin insertion holes 20 and the bolt insertion holes 21 respectively and are positioned and fixed by fitting the locate pins 16 and the bolts 17 into the pin insertion holes 20 and the bolt insertion holes 21 respectively. Therefore, if a reference position is set on a reference line L connecting the pin insertion holes 20, 20, for example, the molding roll 10 according to the present embodiment can be formed by laminating plural types, e.g., ten types corresponding to A to J (see FIG.5), of blades 11 in combination. Such plural types of blades 11 are prepared by shifting the period (45° assignment) of the continuously formed patterns of the roll ridge portions 10a, 10e and the roll root portions 10b, 10d on the peripheral surface from the reference line L by ⁇ degree in phase angle.
- plural types of blades 11 are prepared by shifting the period (45° assignment) of the continuously formed patterns of the roll ridge portions 10a, 10e and the roll root portions 10b, 10d on the peripheral surface from the reference line L by ⁇ degree in phase angle.
- the roll ridge portions 10e constituting the root portion ridges 5e and the roll root portions 10d constituting the ridge portion depressions 5d are formed respectively to have different forming distances and forming lengths in the axis direction of the molding roll 10 under the condition that respective blades 11 are laminated.
- the laminated states A to J of the blades 11 are shown together with the corrugation pattern of the metal thin plate 5 in FIG.5.
- character numbers A to J represent the number of laminated sheets of a group of blades which are formed by laminating plural sheets of blades 11 having the same profile.
- a blade group B is formed by laminating five sheets of blades having the same profile.
- spacers 22 which can set a clearance S (as shown in Fig.1) being needed to form the ridge portion depressions 5d and the root portion ridges 5e of the metal thin plate 5 are interposed between the blade groups A to J which have different phase angles respectively.
- a distance of this clearance S is decided such that an optimal shearing force is applied between the blades 11.
- such distance is set below the plate thickness of the metal thin plate that is to be molded.
- spacers 23 for example, spacers 23 (as shown in Fig.2) for setting a clearance Sa (as shown in Fig.1) to insert guide pieces (not shown) are interposed between respective laminated blades 11, 11 in blade groups B, H at plural locations of the blade groups.
- guide pieces can separate the formed metal thin plate 5 from surfaces of the molding roll 10.
- spacers 22 for setting a clearance S necessary for forming the portions 5d, 5e are interposed between the blade groups, e.g., between the blade group B and the blade group A, whereas spacers 23 for setting the clearance Sa to separate the formed metal thin plate 5 are interposed at desired locations between the blade groups, e.g., between the blades 11,11 of the blade group B.
- the metal thin plate 5 can be formed by enraging a pair of molding rolls 10, 10, in which positions of the roll ridge portions 10a, 10e and the roll root portions 10b, 10d are set oppositely, with each other. In this case, mutual slight displacement of these molding rolls 10, 10 in the axis direction has a great influence on the formation of the ridge portion depressions 5d and the root portion ridges 5e of the metal thin plate 5.
- a stopper plate 24 which can engage with the pair of molding rolls 10, 10 mutually to prevent axial displacement of the molding rolls 10, 10 is interposed between any one of the flanges 14, 15 of the molding roll 10, e.g., the flange 14 and the blade 11 being positioned adjacent to the flange 14.
- the molding roll 10 can be constructed by laminating plural sheets of same blades 11, in which the roll ridge portions 10a, 10e and the roll root portions 10b, 10d are formed by the predetermined assignment angle ⁇ to mate with the corrugation pattern of the corrugated metal thin plate 5 to be formed as shown in Fig.4, into the A to J blade groups while shifting the assignment angle ⁇ as the pitch. Therefore, the desired corrugated metal thin plate 5, which has a plurality of depressions 5d formed along the corrugated ridge portions 5a and ridges 5e formed along the corrugated root portions 5b, can be formed easily.
- the predetermined clearance S is set by interposing the spacers 22 between the A to J blades groups having different phase angles, and also a pair of molding rolls 10, 10 have respective stopper plates 24 which engage with each other to prevent mutual axial displacement of the molding rolls 10,10. Therefore, mutual slight displacement of the molding rolls 10,10 along the axial direction can be eliminated completely, and thus the root portion ridges 5e and the ridge portion depression 5d can be formed properly with good precision.
- the rack portions 10f which partition the roll ridge portions 10a, 10e and the roll root portions 10b, 10d being adjacent in the peripheral direction respectively are formed on the pitch circle PC on the peripheral surface, and also respective contiguous numbers of the roll ridge portions 10a, 10e and the roll root portions 10b, 10d are set to not more than two, and in addition combination of the A to J blade groups are arranged in lamination such that the roll ridge portions 10a, 10e and the roll root portions 10b, 10d have different forming distances and different forming lengths along the axial direction of the molding roll 10 respectively.
- the ideal corrugated metal thin plate 5 can be achieved wherein the flat rack portions 5f can be formed at the center positions of the slant walls 5c, which constitute the ridge portions 5a and the root portions 5b of the corrugation, along the y direction in the corrugated metal thin plate 5 formed by the molding roll 10, and also the ridge portion depressions 5d and the root portion ridges 5e can be formed on both sides of these rack portions 5f in the y direction to have different forming distances and different forming lengths respectively, and also the contiguous number of the ridge portions 5a and root portion ridges 5e of the corrugation and the contiguous number of the root portions 5b and the ridge portion depressions 5d of the corrugation, both being continuously adjacent in the x direction, can be set to not more than two respectively.
- the honeycomb carrier 3a is constructed by using the metal thin plate 5 in which the contiguous numbers of all the ridge portions and the root portions are not more than two in this manner, it is of course that mutual fitting/sticking of the metal thin plates 5, 5 can be avoided because of the presence of a plurality of ridge portion depressions 5d and root portion ridges 5e both having different forming distances and different forming lengths even when the metal thin plates 5, 5 are displaced mutually along the y direction when superposed, and that mutual fitting/sticking of the metal thin plates 5, 5 can be avoided to thus keep the cells therebetween because the ridge portions 5a or the root portion ridges 5e of the corrugation, or the root portions 5b or the ridge portion depressions 5d of the corrugation come into collision with the rack portions 5f even when the metal thin plates 5, 5 are displaced mutually along the x direction.
- the contiguous number of the ridge portions 5a and the root portion ridges 5e of the corrugation and the contiguous number of the root portions 5b and the ridge portion depressions 5d of the corrugation are not more than two respectively, it can be prevented that opening areas of the cells which are formed between the ridge portions 5a and the root portion ridges 5e of the corrugation of one metal thin plate 5 and the root portions 5b and the ridge portion depressions 5d of the corrugation of the other metal thin plate 5 are increased infinitely, as shown by A to F of FIG.8, to thus cause extreme differences of respective cells even though the metal thin plates 5, 5 are displaced mutually along the x direction and thus the slant walls 5c, 5c are partially stuck. As a result, formation of the cells can be ensured and also the purification performance for the exhaust gas can be much more improved.
- the foregoing ridge-root patterns of the metal thin plate 5 act to distribute the exhaust gas into many flow paths as the exhaust gas flows through the cells (see an arrow R labeled to the metal thin plate 5' in FIG.7), whereby the purification performance for the exhaust gas can be still much more improved.
- various corrugation patterns of the metal thin plate 5 can be easily created by changing phase angles of plural sheets of blades 11 to be laminated, i.e., shifting modes of the pitch ⁇ appropriately.
- the above fastening members may be composed of the bolts and nuts. However, it is preferable that the embedded nut in the flange should be employed as the nuts in view of fitting to the manufacturing machine.
- the embodiment provides a molding roll for molding a thin metal plate 5 to be employed as a catalyst carrier.
- the thin metal plate has first elongate regions having first convex portions (ridge portions 5a) and first concave portions (ridge portion depressions 5d) and second elongate regions having second concave portions (root portions 5b) and second convex portions (root portion ridges 5e).
- the first elongate regions 5a,5d and the second elongate regions 5b,5e are disposed alternately in a direction perpendicular to the length thereof.
- the first convex portions (ridge portions 5a) and first concave portions (ridge portion depressions 5d) are arranged alternately along the length of the first elongate regions with cuts being provided between adjacent first convex portions 5a and first concave portions 5d.
- the second concave portions (root portions 5b) and the second convex portions (root portion ridges 5e) are arranged alternately along the length of the second elongate regions with cuts being provided between adjacent second concave portions 5b and second convex portions 5e.
- the molding roll comprises:
- the blades 11 are arranged in adjacent blade sets A-J that each comprises one or more blades.
- Each blade set A-J is phase-shifted by an integral multiple of said second pitch angle ⁇ relative to the or each adjacent blade set to define alternate first and second rows of aligned roll ridge portions and roll root portions extending parallel to the center axis of the molding roll.
- the first rows comprise alternating roll ridge portions 10a and roll root portions 10d for respectively forming the first convex portions (ridge portions 5a) and first concave portions (ridge portion depressions 5d)
- the second rows comprises alternating roll root portions 10b and roll ridge portions 10e for respectively forming the second concave portions (root portions 5b) and second convex portions (root portion ridges 5e).
- the blade sets A-J are arranged such that the first rows of aligned roll ridge portions 10a and roll root portions 10e produce first elongate regions having first convex portions (ridge portions 5a) and first concave portions (ridge portions 5d) of different lengths and the second rows of aligned roll root portions 10b and roll ridge portions 10e produce second elongate regions, each having second concave portions (root portions 5b) and second convex portions (root portion ridges 5e) of different lengths.
- the molding roll further comprises respective spacers 22 between adjacent blade sets A-J.
- the spacers create a clearance to permit the opposite projection of adjacent first convex portions (ridge portions 5a) and first concave portions (ridge portion depressions 5d) and the opposite projection of adjacent second concave portions (root portions 5b) and second convex portions (root portion ridges 5e).
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- Mechanical Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Combustion & Propulsion (AREA)
- General Engineering & Computer Science (AREA)
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Description
- The present invention relates to a molding roll for molding a metal thin plate as a catalyst carrier employed in a metallic catalyst converter.
- As the metallic catalyst converter in the prior art, for example, there have been known the converter in which honeycomb carriers are constructed by laminating corrugated metal thin plates formed of a stainless steel, etc. and flat metal thin plates alternately to create cells between laminated portions, as disclosed in Patent Application Publication (KOKAI) Hei 5-138040, Patent Application Publication (KOKAI) Hei 6-393, etc., A converter in which honeycomb carriers are constructed by rising up a plurality of holding plate portions which have their upper flat surfaces from corrugated concave portions of the corrugated metal thin plate in the opposite direction and then laminating the metal thin plates, as disclosed in Utility Model Application (KOKOKU) Sho 57-8915, and other converters.
- The former metallic catalyst converter in which the corrugated metal thin plates and the flat metal thin plates are laminated alternately is disadvantageous in cost since two types of metal thin plates are needed. This increases the forming step of the honeycomb carrier as well as the forming step and the managing step of the metal thin plates.
- In the latter metallic catalyst converter, even in the case that adjacent laminated metal thin plates are held by holding plates whose upper surfaces being provided at corrugated concave portions are formed flat, there is a possibility that the metal thin plates are fitted mutually and thus cells are not properly formed at the laminated portions when such adjacent laminated metal thin plates are displaced or shifted in the corrugation direction or the corrugation folded direction.
- US-A-4 297 866 discloses a molding roll for molding metal strip to produce slit segments of meshes. The molded metal strip comprises a series of first elongate regions that comprise first convex portions separated by first planar portions and second elongate regions that comprise second concave portions separated by second planar portions. The convex portions and concave portions being side-by-side such that the planar portions define planar strips extending perpendicular to the lengthways direction of the first and second elongate regions.
- The molding roll of US-A-4 297 866 comprises a series of axially aligned plate-like blades having a circumferentially extending forming surface comprising alternating relatively flat equi-spaced portions for producing the first and second planar portions and convex portions for producing the first convex portions and second concave portions. The first convex portions and second concave portions have the same length and the series of blades are set at the same angle with respect to one another.
- The invention provides a molding roll for molding a thin metal plate employed as a catalyst carrier, the thin metal plate including first elongate regions having first convex portions and first concave portions and second elongate regions having second concave portions and second convex portions, the first elongate regions and the second elongate regions being disposed alternately in a direction perpendicular to the length thereof, the first convex portions and first concave portions being arranged alternately along the length of the first elongate regions with cuts being provided between adjacent first convex portions and first concave portions and the second concave portions and the second convex portions being arranged alternately along the length of the second elongate regions with cuts being provided between adjacent second concave portions and second convex portions,
the molding roll comprising: - a plurality of plate-like blades having the same shape disposed in side-by-side relation with the center axes of the plates in line,
- the blades having forming regions which repeat at a constant first pitch angle to form a circumferentially extending forming surface, said first pitch angle being an integral multiple of a second pitch angle,
- each forming region comprising roll ridge portions for forming the first and second convex portions and roll root portions for forming the first and second concave portions,
- the number of successive roll ridge portions in the circumferential direction of the blades being no greater than two,
- the number of successive roll root portions in the circumferential direction of the blades being no greater than two,
- the forming regions further comprising substantially flat rack portions disposed between adjacent roll ridge and roll root portions such that each roll ridge and roll root portion has respective substantially flat rack portions on either side thereof, the formation distance between adjacent roll ridge and roll root portions in the circumferential direction of the blades defining said second pitch angle, and
- the blades being arranged in adjacent blade sets that each comprises one or more blades with each blade set being phase-shifted by an integral multiple of said second pitch angle relative to the or each adjacent blade set to define alternate first and second rows of aligned roll ridge portions and roll root portions extending parallel to the center axis of the molding roll, the first rows comprising alternating roll ridge portions and roll root portions for respectively forming the first convex portions and first concave portions, the second rows comprising alternating roll root portions and roll ridge portions for respectively forming the second concave portions and second convex portions and the blade sets being arranged such that the first rows of aligned roll ridge portions and roll root portions produce first elongate regions having first convex portions and first concave portions of different lengths and the second rows of aligned roll root portions and roll ridge portions produce second elongate regions, each having second concave portions and second convex portions of different lengths; and
- a respective spacer provided between adjacent blade sets, the spacers creating a clearance to permit the opposite projection of adjacent first convex portions and first concave portions and the opposite projection of adjacent second concave portions and second convex portions.
-
- Preferably, the forming regions of each blade comprise the same pattern which is defined by the roll ridge portions and the roll root portions.
- Preferably, the roll ridge portions and the roll root portions of each first row are positioned irregularly with respect to the roll ridge portions and roll root portions of other first rows and the roll ridge portions and roll root portions of each second row are positioned irregularly with respect to the roll ridge portions and roll root portions of the other second rows.
- Preferably, the molding roll further comprises:
- a holder having an axis portion which has a first flange at one end, the blades and spacers being mounted on the axis portion;
- a second flange which is mounted at the other end of the axis portion, such that the blades and the spacers are disposed between the first flange and the second flange;
- at least one locating pin passing through apertures therefor defined by the first flange, the second flange, the blades and the spacers; and
- fastening members for fastening the blades and the spacer between the first flange and the second flange.
-
- Preferably, the molding roll further comprises a stopper plate placed between one of the first flange and the second flange and the blade that is positioned adjacent the one of the first flange and the second flange, the stopper plate being arranged to engage with a partner roll of the molding roll to suppress axial displacement of the molding roll with respect to the partner roll.
- In order that the present invention may be well understood, an embodiment thereof, which is given by way of example only, will now be described, with reference to the accompanying drawings, in which:
- FIG.1 is a perspective view showing a molding roll according to an embodiment of the present invention;
- FIG.2 is a front exploded view showing the molding roll in FIG.1;
- FIG.3 is a side view showing a blade employed in the molding roll in FIG.1;
- FIG.4 is a fragmentary enlarged view showing the blade in FIG.3;
- FIG.5 is a plan view showing a metal thin plate molded by the molding roll in FIG.1 ;
- FIG.6 is a sectional view showing sectional shapes of the metal thin plate at respective positions VIa, VIb, VIc, VId, VIe in FIG.5;
- FIG.7 is a perspective view showing a basic pattern profile of the metal thin plate in FIG.5;
- FIG.8 is a sectional view showing laminated portions of the metal thin plates if a honeycomb carrier is formed by using the metal thin plates shown in FIG.5;
- FIG.9 is a sectional view showing a metallic catalyst carrier;
- FIG.10 is a sectional view, taken along a line X-X in FIG.9, showing the metallic catalyst carrier.
-
- FIGS. 9, 10 show a
metallic catalyst carrier 1 including ametallic catalyst carrier 3 which employs metalthin plate 5 molded by a molding roll. Themetallic catalyst carrier 3 is arranged in a metalouter cylinder 2 which is formed to have an elliptic sectional shape (including an ellipse). -
Diffusers 4 provided at each end of theouter cylinder 2 are separately formed. Thediffusers 4 are fitted into both ends of theouter cylinder 2 and then fixed thereto. - The
metallic catalyst carrier 3 is formed by coating a binder, which is formed of alumina called a "wash coat", on ahoneycomb carrier 3a as a base body, and then applying catalysts such as Pt, etc. on a surface of the binder. - The
honeycomb carrier 3a is constructed by folding the metalthin plate 5, which is formed of stainless steel, etc. and is corrugated, successively like the S-shape along the corrugation direction and then laminating them like a honeycomb to thus form cells at respective laminated portions. - In this case, in addition to the above, the
honeycomb carrier 3a may be constructed by laminating plural sheets of the metalthin plates 5 being cut up into desired lengths, otherwise thehoneycomb carrier 3a may be constructed by winding the metalthin plate 5 to be laminated. - A standard corrugation pattern of the metal
thin plate 5 which is corrugated is shown in FIGS.5, 6. - The metal
thin plate 5 will be explained with reference to a basic profile of a corrugated metalthin plate 5' of this type shown in FIG.7. - The corrugated metal
thin plate 5' of this type shown in FIG.7 has ridge portions 5'a and root portions 5'b acting as standard corrugations. - If the root portion on the left end in FIG.7 is assumed as the root portion 5'b, the ridge portions 5'a and the root portions 5'b of this corrugated metal
thin plate 5' are aligned alternately in sequence in the corrugation direction x (referred to as an "x direction" hereinafter). Flat rack portions 5'f are then provided successively at respective center positions of slant walls 5'c, which define the ridge portions 5'a and the root portions 5'b. The flat rack portions 5'f extend in the corrugation folded direction y (referred to as a "y direction" hereinafter). Using the ridge portions 5'a as their stop ends, a plurality ofridge portion depressions 5'd which project in the opposite direction are provided along theridge portions 5a' of the corrugation at a constant distance along the y direction. Similarly, a plurality of root portion ridges 5'e which project in the opposite direction are provided along the root portions 5'b of the corrugation at a constant distance along the y direction. In this manner, in the corrugated metalthin plate 5' in FIG.7, the ridge portions 5'a and the root portions 5'b are aligned via the rack portions 5'f alternately in sequence along the x direction, and a plurality of theridge portion depression 5'd are provided to the ridge portions 5'a at a constant distance regularly along the y direction and also a plurality of root portion ridges 5'e are provided to the root portions 5'b at a constant distance regularly along the y direction. - The corrugated metal
thin plate 5' shown in FIG.7 constitutes a uniform corrugation pattern in total as described above, whereas the metalthin plate 5 has a certain regularity but constitutes a nonuniform corrugation pattern in total. - More particularly, the metal
thin plate 5 shown in FIGS.5, 6 has theridge portions 5a and theroot portions 5b of the corrugation as basic profiles, like the metalthin plate 5' shown in FIG.7. A plurality ofridge portion depressions 5d, which project from the center position of theslant walls 5c constituting theridge portions 5a and theroot portions 5b in the opposite direction to theridge portions 5a, are provided to thecorrugated ridge portions 5a at a constant distance along the y direction, using therack portions 5f being provided at the above center positions as the side ends. A plurality ofroot portion ridges 5e, which project in the opposite direction to theroot portions 5b, are provided to thecorrugated root portions 5b at a constant distance along the y direction. - Starting from the left end in FIG.5, there is a half portion of a
ridge portion 5a, aroot portion 5b, aridge portion 5a, aroot portion 5b, aligned alternately to form a corrugation pattern ending with a half portion of aridge portion 5a at the right end in FIG.5. As shown in FIG.6, in the VIa column of the metalthin plate 5 located at the bottom end in FIG.5, starting from the left, there is aridge portion depression 5d ofhalf ridge portion 5a, aroot portion 5b,ridge portion 5a,root portion ridge 5e,ridge portion depression 5d,root portion ridge 5e,ridge portion 5a,root portion 5b,ridge portion depression 5d,root portion ridge 5e andridge portion depression 5d of thehalf ridge portion 5a". Similarly, sectional shapes of this metalthin plate 5 in VIb to VIe columns shown at the left end in FIG.5 are given a "ridge- root" arrangement. In this way, as shown in FIG.5, this metalthin plate 5 constitutes corrugation patterns such that this "ridge-root" arrangement is arranged with a certain regularity on an entire surface but arranged nonuniformly in total. - The metal
thin plate 5 is formed by using amolding roll 10 shown in FIGS. 1 to 4. - FIG.1 is a perspective view showing a
molding roll 10 according to an embodiment of the invention. FIG.2 is an exploded view showing themolding roll 10. FIG.3 is a side view showing ablade 11 of a plurality of blades used to form themolding roll 10. FIG.4 is a fragmentary enlarged view showing theblade 11 in FIG.3. - As shown in FIG.1, the
molding roll 10 is constructed by laminating a plurality of sheets ofblades 11 which are formed under the same standard and haveroll ridge portions root portions roll ridge portions ridge portions 5a and theroot portion ridges 5e of the corrugation of the metalthin plate 5. Theroll root portions root portions 5b and theridge portion depressions 5d of the metalthin plate 5. - As shown in FIGS.3, 4, the
roll ridge portions roll root portions blade 11 are formed to have a predetermined assignment angles with respect to a blade center point O in this embodiment, respective contiguous numbers of theroll ridge portions roll root portions blade 11, are set to not more than two. - Almost
flat rack portions 1 0f which partition theroll ridge portion 10a and theroll root portion 10b, or theroll ridge portion 10a and theroll ridge portion 10e, or theroll root portion 10b and theroll root portion 10d, both being adjacent along the peripheral direction, are formed on a pitch circle PC which partitions theroll ridge portions 10a and theroll root portions 10b of theblade 11. - More specifically, on this
blade 11, theroll ridge portion 10a and theroll ridge portion 10e which respectively correspond to a convex portion being assumed as theridge portion 5a of the metalthin plate 5 and a convex portion being assumed as theroot portion ridge 5e respectively are formed as convex portions on the pitch circle PC, while theroll root portion 10b and theroll root portion 10d respectively correspond to a concave portion being assumed as theroot portion 5b of the metalthin plate 5 and a concave portion being assumed as theridge portion 5d are formed as concave portions on the pitch circle PC. - As shown in FIG.3 and FIG.4 as an enlarged view, for example, a continuous pattern of the
roll ridge portions roll root portions blade 11 is formed successively every 45° as one period around the blade center point O. That is, in the case of the present embodiment, a pitch angle = 4.5°, and eight 45° period patterns are formed successively to constitute an outer periphery of theblade 11. - Plural sheets of
blades 11 are inserted onto acylindrical axis portion 13 of aholder 12, on one end of which aflange 14 is formed as shown in FIG.2, and laminated, as will be described later. Aflange 15 is then inserted onto the other end of thecylindrical axis portion 13 to put theblades 11 between theflanges blades 11 are then positioned by press-fitting a plurality of locatingpins 16 through theflanges blades 11. Theblades 11 are then compressed and fixed by fastening members which consist ofbolts 17 that pass through theflanges blades 11 and engageinternal threads 18 being provided in theflange 14. - Therefore, as shown in FIG.3, a plurality of pin insertion holes 20 and a plurality of bolt insertion holes 21 as well as a
center hole 19 into which theaxis portion 13 of theholder 12 is inserted are formed symmetrically around the blade center point O. - In the present embodiment, six
bolts 17 are used. The insertion directions of the bolts are positioned at symmetrical positions and the bolts are positioned at neighboring positions are set oppositely respectively. As a result, plural sheets ofblades 11 can be fastened uniformly. - Some of the
blades 11 are shifted by an integral multiple of a formation distance (pitch angle) between theroll ridge portions roll root portions - For example, if
E-type blades 11 constituting the VIa column and D-type blades 11 constituting the VIb column are compared in FIG.5, the "ridge-root" arrangement on the VIb column is formed to be shifted clockwise relative to the "ridge-root" arrangement on the VIa column by one pitch, as shown in FIG.6, since the D-type blades 11 are shifted clockwise relative to theE-type blades 11 by one pitch from the reference line L. - In other words, as described above, the
blades 11 have the pin insertion holes 20 and the bolt insertion holes 21 respectively and are positioned and fixed by fitting the locate pins 16 and thebolts 17 into the pin insertion holes 20 and the bolt insertion holes 21 respectively. Therefore, if a reference position is set on a reference line L connecting the pin insertion holes 20, 20, for example, themolding roll 10 according to the present embodiment can be formed by laminating plural types, e.g., ten types corresponding to A to J (see FIG.5), ofblades 11 in combination. Such plural types ofblades 11 are prepared by shifting the period (45° assignment) of the continuously formed patterns of theroll ridge portions roll root portions - In the present embodiment, if these plural types of A to
J blades 11 are laminated, theroll ridge portions 10e constituting theroot portion ridges 5e and theroll root portions 10d constituting theridge portion depressions 5d are formed respectively to have different forming distances and forming lengths in the axis direction of themolding roll 10 under the condition thatrespective blades 11 are laminated. - The laminated states A to J of the
blades 11 are shown together with the corrugation pattern of the metalthin plate 5 in FIG.5. - Here, character numbers A to J represent the number of laminated sheets of a group of blades which are formed by laminating plural sheets of
blades 11 having the same profile. For instance, a blade group B is formed by laminating five sheets of blades having the same profile. - In addition, spacers 22 (as shown in Fig.2) which can set a clearance S (as shown in Fig.1) being needed to form the
ridge portion depressions 5d and theroot portion ridges 5e of the metalthin plate 5 are interposed between the blade groups A to J which have different phase angles respectively. - A distance of this clearance S is decided such that an optimal shearing force is applied between the
blades 11. In the present embodiment, such distance is set below the plate thickness of the metal thin plate that is to be molded. - Further, in the present embodiment, for example, spacers 23 (as shown in Fig.2) for setting a clearance Sa (as shown in Fig.1) to insert guide pieces (not shown) are interposed between respective
laminated blades thin plate 5 from surfaces of themolding roll 10. - In other words,
spacers 22 for setting a clearance S necessary for forming theportions spacers 23 for setting the clearance Sa to separate the formed metalthin plate 5 are interposed at desired locations between the blade groups, e.g., between theblades - The metal
thin plate 5 can be formed by enraging a pair of molding rolls 10, 10, in which positions of theroll ridge portions roll root portions ridge portion depressions 5d and theroot portion ridges 5e of the metalthin plate 5. - Therefore, in this embodiment, as shown in Fig.2, a
stopper plate 24 which can engage with the pair of molding rolls 10, 10 mutually to prevent axial displacement of the molding rolls 10, 10 is interposed between any one of theflanges molding roll 10, e.g., theflange 14 and theblade 11 being positioned adjacent to theflange 14. - When the corrugated metal
thin plate 5 is formed by using themolding roll 10 which has the structure in the above embodiment, themolding roll 10 can be constructed by laminating plural sheets ofsame blades 11, in which theroll ridge portions roll root portions thin plate 5 to be formed as shown in Fig.4, into the A to J blade groups while shifting the assignment angle as the pitch. Therefore, the desired corrugated metalthin plate 5, which has a plurality ofdepressions 5d formed along thecorrugated ridge portions 5a andridges 5e formed along thecorrugated root portions 5b, can be formed easily. - In addition, the predetermined clearance S is set by interposing the
spacers 22 between the A to J blades groups having different phase angles, and also a pair of molding rolls 10, 10 haverespective stopper plates 24 which engage with each other to prevent mutual axial displacement of the molding rolls 10,10. Therefore, mutual slight displacement of the molding rolls 10,10 along the axial direction can be eliminated completely, and thus theroot portion ridges 5e and theridge portion depression 5d can be formed properly with good precision. - In
respective blades 11, therack portions 10f which partition theroll ridge portions roll root portions roll ridge portions roll root portions roll ridge portions roll root portions molding roll 10 respectively. Therefore, as shown in FIGS.5, 6, the ideal corrugated metalthin plate 5 can be achieved wherein theflat rack portions 5f can be formed at the center positions of theslant walls 5c, which constitute theridge portions 5a and theroot portions 5b of the corrugation, along the y direction in the corrugated metalthin plate 5 formed by themolding roll 10, and also theridge portion depressions 5d and theroot portion ridges 5e can be formed on both sides of theserack portions 5f in the y direction to have different forming distances and different forming lengths respectively, and also the contiguous number of theridge portions 5a androot portion ridges 5e of the corrugation and the contiguous number of theroot portions 5b and theridge portion depressions 5d of the corrugation, both being continuously adjacent in the x direction, can be set to not more than two respectively. - In the event that the
honeycomb carrier 3a is constructed by using the metalthin plate 5 in which the contiguous numbers of all the ridge portions and the root portions are not more than two in this manner, it is of course that mutual fitting/sticking of the metalthin plates ridge portion depressions 5d androot portion ridges 5e both having different forming distances and different forming lengths even when the metalthin plates thin plates ridge portions 5a or theroot portion ridges 5e of the corrugation, or theroot portions 5b or theridge portion depressions 5d of the corrugation come into collision with therack portions 5f even when the metalthin plates ridge portions 5a and theroot portion ridges 5e of the corrugation and the contiguous number of theroot portions 5b and theridge portion depressions 5d of the corrugation are not more than two respectively, it can be prevented that opening areas of the cells which are formed between theridge portions 5a and theroot portion ridges 5e of the corrugation of one metalthin plate 5 and theroot portions 5b and theridge portion depressions 5d of the corrugation of the other metalthin plate 5 are increased infinitely, as shown by A to F of FIG.8, to thus cause extreme differences of respective cells even though the metalthin plates slant walls - In this case, the foregoing ridge-root patterns of the metal
thin plate 5 act to distribute the exhaust gas into many flow paths as the exhaust gas flows through the cells (see an arrow R labeled to the metalthin plate 5' in FIG.7), whereby the purification performance for the exhaust gas can be still much more improved. - Furthermore, since the
ridge portion depressions 5d and theroot portion ridges 5e, which are formed adjacent in the corrugation direction of the metalthin plate 5, are risen up on both sides of therack portions 5f which are formed at the center positions of theslant walls 5c constituting theridge portions 5a and theroot portions 5b of the corrugation of the metalthin plate 5, distances corresponding to the widths of therack portions 5f can be kept in the corrugation direction between respective rising-up stop ends of theroot portion depressions 5d and theroot portion ridges 5e which are positioned in the neighborhood along the corrugation direction, and therefore rupture of the rising-up stop ends due to difference in a coefficient of thermal expansion can be avoided. As a result, breaking endurance rigidity of the metalthin plate 5 per se can be enhanced and in turn durability of thehoneycomb carrier 3a, i.e., durability of themetallic catalyst carrier 3 can be improved. - Meanwhile, plural sheets of
blades 11 and thespacers blades 11, which constitute themolding roll 10, are positioned in good order by the press-fitting positions of the locate pins 16 between theflange 14 provided to one end of theholder 12 and theflange 15 provided to the other end of theholder 12, then laminated, and then fastened/fixed tightly by the fastening members which consist of a plurality ofbolts internal threads flanges blades stopper plates 24, and also forming precision of the corrugated metalthin plate 5 can be improved further more. - In addition, various corrugation patterns of the metal
thin plate 5 can be easily created by changing phase angles of plural sheets ofblades 11 to be laminated, i.e., shifting modes of the pitch appropriately. - The above fastening members may be composed of the bolts and nuts. However, it is preferable that the embedded nut in the flange should be employed as the nuts in view of fitting to the manufacturing machine.
- In summary, and as best seen with reference to Figures 5 to 7, the embodiment provides a molding roll for molding a
thin metal plate 5 to be employed as a catalyst carrier. The thin metal plate has first elongate regions having first convex portions (ridge portions 5a) and first concave portions (ridge portion depressions 5d) and second elongate regions having second concave portions (root portions 5b) and second convex portions (root portion ridges 5e). The firstelongate regions elongate regions ridge portions 5a) and first concave portions (ridge portion depressions 5d) are arranged alternately along the length of the first elongate regions with cuts being provided between adjacent firstconvex portions 5a and firstconcave portions 5d. The second concave portions (root portions 5b) and the second convex portions (root portion ridges 5e) are arranged alternately along the length of the second elongate regions with cuts being provided between adjacent secondconcave portions 5b and secondconvex portions 5e. - The molding roll comprises:
- a plurality of plate-
like blades 11 having the same shape disposed in side-by-side relation with the center axes of the plates in line. The blades have forming regions which repeat at a constantfirst pitch angle 10 to form a circumferentially extending forming surface, saidfirst pitch angle 10 being an integral multiple of a second pitch angle . Each forming region comprisesroll ridge portions convex portions root portions concave portions roll ridge portions roll root portions flat rack portions 10f disposed betweenadjacent roll ridge 10a, 0e and rollroot adjacent roll ridge root blades 11 defining said second pitch angle . -
- The
blades 11 are arranged in adjacent blade sets A-J that each comprises one or more blades. Each blade set A-J is phase-shifted by an integral multiple of said second pitch angle relative to the or each adjacent blade set to define alternate first and second rows of aligned roll ridge portions and roll root portions extending parallel to the center axis of the molding roll. The first rows comprise alternatingroll ridge portions 10a and rollroot portions 10d for respectively forming the first convex portions (ridge portions 5a) and first concave portions (ridge portion depressions 5d), the second rows comprises alternatingroll root portions 10b and rollridge portions 10e for respectively forming the second concave portions (root portions 5b) and second convex portions (root portion ridges 5e). The blade sets A-J are arranged such that the first rows of alignedroll ridge portions 10a and rollroot portions 10e produce first elongate regions having first convex portions (ridge portions 5a) and first concave portions (ridge portions 5d) of different lengths and the second rows of alignedroll root portions 10b and rollridge portions 10e produce second elongate regions, each having second concave portions (root portions 5b) and second convex portions (root portion ridges 5e) of different lengths. The molding roll further comprisesrespective spacers 22 between adjacent blade sets A-J. The spacers create a clearance to permit the opposite projection of adjacent first convex portions (ridge portions 5a) and first concave portions (ridge portion depressions 5d) and the opposite projection of adjacent second concave portions (root portions 5b) and second convex portions (root portion ridges 5e).
Claims (5)
- A molding roll for molding a thin metal plate (5) employed as a catalyst carrier, the thin metal plate including first elongate regions having first convex portions (5a) and first concave portions (5d) and second elongate regions having second concave portions (5b) and second convex portions (5e), the first elongate regions (5a,5d) and the second elongate regions (5b,5e) being disposed alternately in a direction perpendicular to the length thereof, the first convex portions (5a) and first concave portions (5d) being arranged alternately along the length of the first elongate regions with cuts being provided between adjacent first convex portions (5a) and first concave portions (5d) and the second concave portions (5b) and the second convex portions (5e) being arranged alternately along the length of the second elongate regions with cuts being provided between adjacent second concave portions (5b) and second convex portions (5e),
the molding roll comprising:a plurality of plate-like blades (11) having the same shape disposed in side-by-side relation with the center axes of the plates in line,the blades having forming regions (10a-10f) which repeat at a constant first pitch angle (10) to form a circumferentially extending forming surface, said first pitch angle (10) being an integral multiple of a second pitch angle (),each forming region comprising roll ridge portions (10a,10e) for forming the first and second convex portions (5a,5e) and roll root portions (10b,10d) for forming the first and second concave portions (5b,5e),the number of successive roll ridge portions (10a,10e) in the circumferential direction of the blades being no greater than two,the number of successive roll root portions (10b,10d) in the circumferential direction of the blades being no greater than two,the forming regions further comprising substantially flat rack portions (10f) disposed between adjacent roll ridge and roll root portions such that each roll ridge and roll root portion has respective substantially flat rack portions on either side thereof, the formation distance between adjacent roll ridge (10a, 10e) and roll root (10b, 10d) portions in the circumferential direction of said blades (11) defining said second pitch angle (), andthe blades (11) being arranged in adjacent blade sets (A-J) that each comprises one or more blades with each blade set (A-J) being phase-shifted by an integral multiple of said second pitch angle () relative to the or each adjacent blade set to define alternate first and second rows of aligned roll ridge portions and roll root portions extending parallel to the center axis of the molding roll, the first rows comprising alternating roll ridge portions (10a) and roll root portions (10d) for respectively forming the first convex portions (5a) and first concave portions (5d), the second rows comprising alternating roll root portions (10b) and roll ridge portions (10e) for respectively forming the second concave portions (5b) and second convex portions (5e) and the blade sets (A-J) being arranged such that the first rows of aligned roll ridge portions (10a) and roll root portions (10e) produce first elongate regions having first convex portions (5a) and first concave portions (5d) of different lengths and the second rows of aligned roll root portions (10b) and roll ridge portions (10e) produce second elongate regions, each having second concave portions (5b) and second convex portions (5e) of different lengths; anda respective spacer (22) provided between adjacent blade sets (A-J), the spacers creating a clearance to permit the opposite projection of adjacent first convex portions (5a) and first concave portions (5d) and the opposite projection of adjacent second concave portions (5b) and second convex portions (5e). - A molding roll according to claim 1, wherein the forming regions of each blade (11) comprise the same pattern which is defined by the roll ridge portions (10a,10e) and the roll root portions (10b,10d).
- A molding roll according to claim 1, wherein the roll ridge portions (10a) and the roll root portions (10d) of each first row are positioned irregularly with respect to the roll ridge portions (10a) and roll root portions (10d) of other first rows and the roll ridge portions (10e) and roll root portions (10b) of each second row are positioned irregularly with respect to the roll ridge portions (10e) and roll root portions (10b) of the other second rows.
- A molding roll according to claim 1, further comprising:a holder having an axis portion (13) which has a first flange (14) at one end, the blades (11) and spacers (22) being mounted on the axis portion;a second flange (15) which is mounted at the other end of the axis portion, such that the blades and the spacers are disposed between the first flange and the second flange;at least one locating pin (16) passing through apertures therefor defined by the first flange, the second flange, the blades and the spacers; andfastening members (17) for fastening the blades and the spacer between the first flange and the second flange.
- A molding roll according to claim 1, further comprising:a stopper plate (24) placed between one of the first flange (14) and the second flange (15) and the blade (11) that is positioned adjacent the one of the first flange and the second flange, the stopper plate being arranged to engage with a partner roll of the molding roll to suppress axial displacement of the molding roll with respect to the partner roll.
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP7459898 | 1998-03-23 | ||
JP10074599A JPH11267767A (en) | 1998-03-23 | 1998-03-23 | Forming roll device for corrugated metallic sheet for catalyst support |
JP7459998 | 1998-03-23 | ||
JP10074598A JPH11267766A (en) | 1998-03-23 | 1998-03-23 | Forming roll for metallic sheet for catalyst support |
Publications (3)
Publication Number | Publication Date |
---|---|
EP0945195A2 EP0945195A2 (en) | 1999-09-29 |
EP0945195A3 EP0945195A3 (en) | 2001-11-21 |
EP0945195B1 true EP0945195B1 (en) | 2005-11-30 |
Family
ID=26415761
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19990302246 Expired - Lifetime EP0945195B1 (en) | 1998-03-23 | 1999-03-23 | Molding roll for metal thin plate as catalyst carrier |
Country Status (2)
Country | Link |
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EP (1) | EP0945195B1 (en) |
DE (1) | DE69928590T2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8336176B2 (en) | 2003-02-06 | 2012-12-25 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Method and tool for producing structured sheet metal layers, method for producing a metal honeycomb body, and catalyst carrier body |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102006003317B4 (en) | 2006-01-23 | 2008-10-02 | Alstom Technology Ltd. | Tube bundle heat exchanger |
US9557119B2 (en) | 2009-05-08 | 2017-01-31 | Arvos Inc. | Heat transfer sheet for rotary regenerative heat exchanger |
US9200853B2 (en) | 2012-08-23 | 2015-12-01 | Arvos Technology Limited | Heat transfer assembly for rotary regenerative preheater |
US9579702B2 (en) * | 2013-01-28 | 2017-02-28 | Arvos Inc. | Roller for forming heat transfer elements of heat exchangers |
US10175006B2 (en) | 2013-11-25 | 2019-01-08 | Arvos Ljungstrom Llc | Heat transfer elements for a closed channel rotary regenerative air preheater |
US10094626B2 (en) | 2015-10-07 | 2018-10-09 | Arvos Ljungstrom Llc | Alternating notch configuration for spacing heat transfer sheets |
CN108655289A (en) * | 2018-06-11 | 2018-10-16 | 苏州航泰蜂窝科技有限公司 | A kind of aluminium honeycomb core punching coating system |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1559084A (en) * | 1975-07-08 | 1980-01-16 | Svenska Rotor Maskiner Ab | Rolling mills |
CA1106703A (en) * | 1979-08-01 | 1981-08-11 | John V. Marlow | Asymmetrical shaping of slit segments of meshes formed in deformable strip |
EP0150913A2 (en) * | 1984-02-01 | 1985-08-07 | General Motors Corporation | Roller tooling for forming corrugated strip |
US4888972A (en) * | 1988-07-01 | 1989-12-26 | Pronto Auto Repair Dealerships Inc. | Process and apparatus for the manufacture of radiator cooling fins |
US5239735A (en) * | 1989-12-28 | 1993-08-31 | Matsushita Electric Industrial Co., Ltd. | Method for manufacturing expanded mesh sheet |
DE4011681A1 (en) * | 1990-04-11 | 1991-10-17 | Bueltmann Monika | Rolling stand with sliding roll shafts - for tube forming using hydraulically tensioned roll shafts axially withdrawn by integral cylinders for rapid roll changing |
-
1999
- 1999-03-23 DE DE1999628590 patent/DE69928590T2/en not_active Expired - Fee Related
- 1999-03-23 EP EP19990302246 patent/EP0945195B1/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US8336176B2 (en) | 2003-02-06 | 2012-12-25 | Emitec Gesellschaft Fuer Emissionstechnologie Mbh | Method and tool for producing structured sheet metal layers, method for producing a metal honeycomb body, and catalyst carrier body |
Also Published As
Publication number | Publication date |
---|---|
DE69928590T2 (en) | 2006-08-03 |
DE69928590D1 (en) | 2006-01-05 |
EP0945195A2 (en) | 1999-09-29 |
EP0945195A3 (en) | 2001-11-21 |
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