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
  • F01N3/2807—Metal other than sintered metal
  • F01N3/281—Metallic honeycomb monoliths made of stacked or rolled sheets, foils or plates
• • 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
• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
  • B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
  • B01J35/00—Catalysts, in general, characterised by their form or physical properties
  • B01J35/50—Catalysts, in general, characterised by their form or physical properties characterised by their shape or configuration
  • B01J35/56—Foraminous structures having flow-through passages or channels, e.g. grids or three-dimensional monoliths
  • B01J35/57—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
  • F01N2330/00—Structure of catalyst support or particle filter
  • F01N2330/30—Honeycomb supports characterised by their structural details
  • F01N2330/44—Honeycomb supports characterised by their structural details made of stacks of sheets, plates or foils that are folded in S-form

Definitions

• the present invention relates to a device and a method for producing a honeycomb body, in particular a catalyst carrier body, from at least one stack of a plurality of at least partially structured sheets.
• Catalysts are used to reduce the amount of pollutants in exhaust gases, especially in motor vehicle exhaust gases.
• the carrier bodies in such catalysts can be designed in the form of metallic honeycomb bodies.
• honeycomb bodies comprise a stack of a large number of at least partially structured sheets. From US-A 4,923,109 a honeycomb body is known which has a stack intertwined in opposite directions around itself and around a central area.
• WO 90/03220 discloses a metallic catalyst carrier body which is constructed from at least partially structured sheets.
• This catalyst carrier body comprises at least three stacks of sheets, at least three of the stacks being folded around an associated crease line in the central region of the honeycomb body and, in the folded state, intertwined around one another and around the central region with the fold lines.
• Devices for producing such honeycomb bodies which have a fork-shaped wrapping device which can be rotated about an axis and which engages on each stack, and mold segments which close to form includes.
• the inner contour of the closed shape corresponds to the outer contour of the honeycomb body in the wrapped state.
• the mold segments are moved towards the stack in such a way that, during the rotation of the fork-shaped interlocking device, the stack or the stack abuts against the edge of the mold segments and this edge Abutment forms.
• the mold is completely closed, giving the honeycomb body its final shape.
• the known devices have two segments which can be moved in a straight line towards and away from one another.
• During the closing process there is a risk that at least one mold segment will move against the direction of movement of the section of the stack that is still to be devoured.
• If the shaped segment comes against the section undesired deformation of the stack or the stacks can occur.
• Such a deformation can lead to individual sheets of the stack being partially bent.
• the deformation of the sheets influences the structure of the honeycomb body.
• the strength of the honeycomb body suffers from such deformations and on the other hand there is a local change in the channel cross-sections. Such changes in the channel cross-section produce an uneven exhaust gas distribution through the honeycomb body, which can influence the catalytic effect of the honeycomb body.
• the known honeycomb bodies are predominantly circular in cross section.
• the production of other cross-sections requires other production methods.
• a manufacturing method is e.g. B. known from US-PS 4,519,120.
• a honeycomb body is first wound and then deformed by tools.
• the present invention is based on the object of developing the known device and the known method for producing a honeycomb body in such a way that deformation of stacks or individual sheets is avoided during the production process.
• the possibility should be given to produce honeycomb bodies which have a non-circular cross section.
• the device according to the invention for producing a honeycomb body, in particular a catalyst support body, from at least one stack of a multiplicity of at least partially structured sheets which form a multiplicity of channels which are permeable to a fluid comprising a fork-shaped holding device which engages each stack and has shaped segments which can form a shape, each shaped segment each having a jacket section, which together form the outer shape of the honeycomb body to be produced when the shape is closed, characterized in that at least two shaped segments are provided which are arranged so as to be displaceable, that at least a portion of each jacket section adjacent to the stack describes a movement path corresponding to the outer shape in the direction of the respective free end of the stack.
• each jacket section characterized in that at least a section of each jacket section describes a movement path corresponding to the outer shape in the direction of the respective free end of the stack, the respective section of the stack in contact with the section of the molding segment is deformed in such a way that in the final state of the formation of the Stack receives the desired outer shape of the honeycomb body to be produced.
• the fact that the direction of the movement path extends to the respective free end of the stack prevents deformation of the individual sheet metal layers or stacks, in contrast to the previously known method, since the shaped segments nestle the sections of the stack into the final shape.
• a corresponding number of the shape segments can be selected which bring about the wrapping of the stacks or individual sheet-metal layers.
• two shape segments are provided which are displaceable in the same direction.
• the section of the jacket section of the molded segment can be of different lengths during the course of the movement. This depends on the one hand on the movement sequence of the shaped segment and on the other hand on the outer shape of the honeycomb body to be produced.
• An embodiment of the device is preferred in which the shaped segments are positioned opposite one another in their respective starting position.
• the shaped segments are preferably positioned opposite one another in pairs.
• the movement of the mold segments is particularly synchronous. This is not mandatory. It is sufficient that the speed of the individual movements of the mold segments is so different that the mold segments do not collide with one another during the production of the honeycomb body.
• a method for producing a honeycomb body with a multiplicity of channels permeable to a fluid from a multiplicity of at least partially structured metal sheets is proposed.
• a stack of a plurality of at least partially structured sheets is first layered. The stack is introduced into an open mold and held in a central area by a holding device. The ends of the stack extend radially outward from the central region.
• At least two mold segments are each shifted from their starting positions so that at least a partial section of each jacket section comes to rest on the stack.
• the mold segments are then moved along a movement path corresponding to the outer shape in such a way that at least a partial section of each jacket section is always in contact with the stack. After a predetermined degree of wrapping of the stack is reached, the mold is closed.
• a method for the production of honeycomb bodies, a method is also proposed in which a plurality of stacks are layered from a plurality of at least partially structured sheets. Each stack is folded along a crease line. The stacks are introduced into an open mold and are held in this by a holding device in a central area. Subsequently, at least two mold segments are shifted from their starting positions in such a way that at least a partial section of each jacket section of the mold segment lies against the respective stack reached. The mold segments are moved in a movement path corresponding to the outer shape, so that a partial section of each jacket section of a mold segment is always in contact with the stack. After a predetermined degree of wrapping of the stacks has been reached, the mold is closed.
• This device and the method open up the possibility of producing honeycomb bodies which have a cross section different from the circular cross section.
• This method and the device result in a honeycomb body which has a uniform structure.
• FIG. 1 schematically shows a top view of a device for producing a honeycomb body with an open shape
• Fig. 5 shows the partially closed shape
• Fig. 6 shows the closed shape in plan view.
• the device has a fork-shaped holding device which holds the stack 1 in the central region of the mold.
• the stack 1 is entwined around the mandrels 13, 14 of the holding device.
• the shape has four shape segments 2, 3, 4 and 5. Together they form a shape 10 in the closed state.
• Each shape segment 2 to 5 has a jacket section 6, 7, 8 and 9 which, when the shape 10 is closed, result in an outer shape 15 of the honeycomb body to be produced.
• the mold segments 3 and 5 are arranged to be displaceable radially inwards and radially outwards.
• FIG. 3 shows the position of the mold segments 2 and 4 which they assume when the mold segments 2 and 4 have been rotated through 30 °. During the rotation in the direction of the arrow R, a further section of the stack was deformed. The rotation of the mold segments 2 and 4 was carried out so that the section 11 or 12 of the mold segment 2 or 4 was always on the stack.

Landscapes

• Chemical & Material Sciences (AREA)
• Chemical Kinetics & Catalysis (AREA)
• Engineering & Computer Science (AREA)
• Health & Medical Sciences (AREA)
• Toxicology (AREA)
• Combustion & Propulsion (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Catalysts (AREA)
• Exhaust Gas After Treatment (AREA)

Priority Applications (8)

Applications Claiming Priority (2)

Related Child Applications (1)

Publications (1)

Family

ID=7768882

Family Applications (1)

Country Status (12)

Cited By (3)

Families Citing this family (10)

Citations (4)

Family Cites Families (3)

• 1995
  • 1995-08-07 DE DE19528963A patent/DE19528963A1/de not_active Withdrawn
• 1996
  • 1996-05-27 IN IN958CA1996 patent/IN188933B/en unknown
  • 1996-06-18 BR BR9609587A patent/BR9609587A/pt not_active IP Right Cessation
  • 1996-06-18 DE DE59601394T patent/DE59601394D1/de not_active Expired - Lifetime
  • 1996-06-18 WO PCT/EP1996/002629 patent/WO1997006358A1/de active IP Right Grant
  • 1996-06-18 RU RU98104273/06A patent/RU2153084C2/ru not_active IP Right Cessation
  • 1996-06-18 KR KR10-1998-0700860A patent/KR100413398B1/ko not_active Expired - Fee Related
  • 1996-06-18 EP EP96922829A patent/EP0846219B1/de not_active Expired - Lifetime
  • 1996-06-18 AU AU63568/96A patent/AU6356896A/en not_active Abandoned
  • 1996-06-18 JP JP50804897A patent/JP3930906B2/ja not_active Expired - Lifetime
  • 1996-06-18 ES ES96922829T patent/ES2130836T3/es not_active Expired - Lifetime
  • 1996-06-18 CN CN96196123A patent/CN1081731C/zh not_active Expired - Lifetime
  • 1996-07-10 TW TW085108343A patent/TW332788B/zh not_active IP Right Cessation

Patent Citations (4)

Non-Patent Citations (1)

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