EP0228538B1 - Procédé et dispositif pour fabriquer des pièces de moulées munies conduits et en poudre moulable, notamment en matière moulable céramique, dénomination typique: honeycomb - Google Patents

Procédé et dispositif pour fabriquer des pièces de moulées munies conduits et en poudre moulable, notamment en matière moulable céramique, dénomination typique: honeycomb Download PDF

Info

Publication number
EP0228538B1
EP0228538B1 EP86115404A EP86115404A EP0228538B1 EP 0228538 B1 EP0228538 B1 EP 0228538B1 EP 86115404 A EP86115404 A EP 86115404A EP 86115404 A EP86115404 A EP 86115404A EP 0228538 B1 EP0228538 B1 EP 0228538B1
Authority
EP
European Patent Office
Prior art keywords
rods
mould cavity
inflatable tubes
mould
membrane
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
Application number
EP86115404A
Other languages
German (de)
English (en)
Other versions
EP0228538A1 (fr
Inventor
Eugen Bühler
Klaus Strobel
Karl Schwarzmeier
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hutschenreuther AG
Original Assignee
Hutschenreuther AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hutschenreuther AG filed Critical Hutschenreuther AG
Priority to AT86115404T priority Critical patent/ATE57128T1/de
Publication of EP0228538A1 publication Critical patent/EP0228538A1/fr
Application granted granted Critical
Publication of EP0228538B1 publication Critical patent/EP0228538B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/28—Cores; Mandrels
    • B28B7/30—Cores; Mandrels adjustable, collapsible, or expanding
    • B28B7/32—Cores; Mandrels adjustable, collapsible, or expanding inflatable
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B3/00—Producing shaped articles from the material by using presses; Presses specially adapted therefor
    • B28B3/02—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form
    • B28B3/08—Producing shaped articles from the material by using presses; Presses specially adapted therefor wherein a ram exerts pressure on the material in a moulding space; Ram heads of special form with two or more rams per mould
    • B28B3/086—The rams working in different directions
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/16—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes
    • B28B7/18—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes the holes passing completely through the article
    • B28B7/183—Moulds for making shaped articles with cavities or holes open to the surface, e.g. with blind holes the holes passing completely through the article for building blocks or similar block-shaped objects

Definitions

  • the invention relates to a process for the production of channeled compacts from a molding compound, in which in a mold cavity filled with the molding compound and penetrated by bars surrounded by inflation tubes, the inflation tubes are expanded by means of fluid pressure brought to the inside thereof, compacting the molding composition to form the compact and after Depletion of the fluid pressure, the coated rods withdrawn from the compact and this is removed from the mold cavity.
  • Such a method is known from DE-B 1 016 178.
  • a plastic molding compound for the production of hollow building blocks is processed as the molding compound.
  • the inflatable hoses assume their state of smallest cross-section. They have a radial distance from the bars surrounded by them.
  • a device for molding hollow bodies with cavities passing through the whole molding is known.
  • the cavities are formed by stretchable cores in the form of tubes. These tubes are arranged around bars at a radial distance from them and centered at their ends.
  • the invention is based on the object of specifying a method with the aid of which channels of small caliber can optionally also be produced in a form-retaining manner in the respective compact.
  • the shape of the channels can be dimensioned exactly as an image of the rods, so that channels can be produced, for example, with a cross-sectional dimension of 1 mm to 10 mm, in particular 3 mm to 8 mm, the cross-sectional shape of the channels, for example can be round or polygonal, i.e. roughly square.
  • the compacts to be produced are intended in particular for further processing into moldings which have a large inner surface and are used in physical and chemical reactions.
  • the shaped bodies can either be microporous, so that capillaries start from the individual channels, which in turn serve to enlarge the inner surface. But it is also conceivable that the inner surface is formed exclusively by the channels.
  • the molding compound can either itself be a reactant, for example a catalytic reactant. However, it is also conceivable for the molding compound to be mixed with a substance which is a reactant, for example a catalytic reactant.
  • the molded body in particular in the region of the channels, is coated with a substance, for example by vapor deposition, and that this coating is effective as a reactant, for example a catalytic reactant, in the respective process.
  • the moldings obtained from the compacts are used wherever large surfaces are required, for example in the heat exchange between aggressive media.
  • the compacts can be finished to the shaped bodies in a conventional manner by firing or sintering.
  • a ceramic molding compound is particularly suitable as the powdered molding compound.
  • molding compositions with additions of catalytic reactants are possible, which in turn can be produced on the basis of a ceramic base substance.
  • Spray-dried granules as mentioned, for example, in DE-A 3 101 236, page 31, last paragraph and page 32, first paragraph, are particularly suitable for processing by the process according to the invention.
  • very high pressures can be applied by expanding the inflation hoses under fluid pressure, in particular under hydraulic pressure using a liquid fluid, which lead to isostatic compaction of the material, so that its stability after pressing and even before firing, Sintering or other hardening is guaranteed.
  • fluid pressure in the inflation hoses After the fluid pressure in the inflation hoses has been reduced, they immediately return to their starting position of smaller diameter due to the elasticity of the materials that are regularly used, such as rubber or other elastomers, so that it is readily possible to pull the rods back immediately after the inflation process and with it the hoses, and in this way to demold the compact.
  • channels of very small caliber for example with a diameter of 1 to 10 mm
  • channels of very small caliber for example with a diameter of 1 to 10 mm
  • moldings with a very large specific surface area such as, for example, in the exhaust gas detoxification of commercial systems, however are also required for exhaust gas detoxification from motor vehicles.
  • the rods and the inflatable hoses require considerable manufacturing effort, particularly when forming channels of small caliber.
  • the hoses and the channels are only subjected to relatively low loads, even at high pressures of the fluid, since the load is absorbed by the molding compound or by the guides accommodating the rods and the hoses in the boundary walls of the mold cavity. It can therefore be expected that the equipment used to manufacture the moldings will have a long service life.
  • the dimensions of the mold cavities can be chosen as large as desired, depending on the technique used for the filling. As a rule, the dimensioning of the mold cavity will be made dependent on the requirements for the dimensions of the molded body ultimately used. In the event that molded articles of extreme size are required, it is also possible to produce building blocks for the required molded articles by the process according to the invention and to place them on top of one another and, if necessary, to connect them to one another.
  • the pressing process which is essentially based on the contribution of the inflation hoses, can also be supported by exposing a membrane, which at least partially delimits the mold cavity, to a fluid pressure on the side remote from the molding composition, in particular simultaneously with the application of fluid pressure to the inflation hoses.
  • the proportion of contacting that is supplied by the membrane naturally depends on the overall cross section of the molded product and is smaller the larger this cross section becomes.
  • a negative pressure is also maintained on the inside of the inflation hoses and possibly also on the side of the membrane remote from the molding compound, in order to keep the inflation hoses in contact with the rods and possibly the membrane to keep in contact with the molded jacket.
  • the invention further relates to a device for producing channeled compacts from powdered molding composition, comprising a mold cavity, a group of bars within the mold cavity, which are surrounded by inflation hoses at least over part of their length, a filling device for filling the mold cavity with the powdery Molding compound and a fluid supply device for the supply of pressure fluid to the inside of the inflation hoses.
  • the mold cavity can be at least partially delimited by a pressurizable membrane in order to exert compacting pressure on the resulting compact from the outside.
  • the membrane will preferably be made as a jacket membrane with generators parallel to the bars; it has been shown that optimal uniformity of density in the compact is obtained.
  • the bars be at least at their ends transverse to their longitudinal direction in a fixed position with respect to the mold cavity during the pressurization of the inflation hoses and possibly the membrane. It has been shown that in this way an exact distribution of the channels and an approximate cross-sectional constancy of the channels along their length is achieved, so that several molded bodies obtained from such compacts with aligned channels can be connected to one another.
  • a rod holder at one end of the rods and a linear drive for this rod holder are provided for the joint retraction and extension of the rods in or out of the mold cavity, with the press bear, for example, as a linear drive the press usual in the ceramic industry can be used, a press that is necessary anyway in order to apply the mold clamping force for the mold cavity.
  • a perforated mold wall of the mold cavity facing the rod holder and penetrated by the rods is connected to the rod holder for common movement by the linear drive.
  • the penetrated mold end wall can form the essential part of the rod holder. When the bars are pulled, the mold end wall penetrated by the bars is also lifted.
  • a particularly simple and, in the presence of a large number of rods and in particular in the case of small-caliber rods, a very economical measure both for fixing the rods in the respective housing and for sealing the tubes during the pressing, if appropriate also for both purposes at the same time, is that the inflatable tubes, together with the rods, pass through a squeeze plate made of elastomeric material which can be squeezed between two squeezing surfaces and which can be squeezed for the purpose of sealing the inflatable tubes in the region of the respective end and / or for fixing the tubes and rods in the region of the respective end.
  • the squeeze plate can be enclosed between a surface of the respective perforated mold end wall remote from the mold cavity and a perforated pressure plate, this pressure plate being able to be pressed against the respective mold end wall by conventional hydraulic or pneumatic means.
  • the supply of the inflation hoses with pressurized fluid that they are connected or connectable to at least one end to a central fluid supply chamber, this fluid supply chamber being able to be formed in the region of one mold end wall or both mold end walls and possibly with the mold end wall can be combined to form a structural unit.
  • the unhindered inflow of fluids to the inflation hoses can be secured according to a first possibility in such a way that the inflation hoses are open at at least one end, the open end being in communication with the fluid supply chamber. If it turns out that when the pressure is being applied, the inflation hoses are closed unintentionally, they can be expanded in a funnel shape at their open ends or the rods can be designed with fluid supply grooves on their surface and / or fluid supply channels on the inside.
  • this embodiment it is possible to work with inflation hoses which are open at both ends; the holder of the rods and the inflation hoses at one end is particularly simple in that the holder is simply taken over by the one squeeze plate.
  • the installation of the coated rods is extremely simple because the rods only need to be inserted through the squeeze plate and then when the squeeze plate is squeezed to maintain their hold in the axial and transverse directions.
  • the mold cavity can be provided with air suction means and at least one molding compound filling opening if the mold closing known from DE-A 3 101 236 is to be used. It is advisable, according to DE-A 3 101 236, to design the air suction means as a circumferential gap or a circumferential row of openings along the joint between a mold end wall and a mold jacket and the at least one molding compound filling opening in the joint area between the mold jacket and an opposite one Arrange the mold end wall. In this way, the requirement already laid down in DE-A 3 101 236 is met that the air suction openings should be along at least a maximum circumference of the mold cavity and the molding material supply at one point as far as possible equidistant from the suction openings or the suction gap. For details, reference is also made to the disclosure of DE-A 3 101 236 and the corresponding US Pat. No. 4,473,526.
  • the demolding it can be advantageous to design the mold cavity with an at least two-part mold jacket.
  • the design with a subdivided molded jacket allows molded molded parts to be molded on the outside of the molded part, which differ from the cylindrical or prismatic shape, for example mounting flanges.
  • a closed molded jacket can be used which supports the jacket membrane on the inside.
  • the jacket membrane also opens up the possibility of attaching profilings to the outside of the molding, including profilings that deviate from the cylindrical or prismatic shape of the molding. The only requirement for this is that the possible retraction path of the membrane is set so that it is greater than the height of such profiles relative to the surface of the molding.
  • the molding compound filling opening can be implemented by a sealing stamp with an end surface adapted to the shape of the molding cavity if one wishes to avoid impressions of the molding compound at the location of the molding compound supply opening.
  • the bars run essentially vertically within the mold cavity and can be pulled out of the mold cavity upwards. This is also advantageous in order to avoid bending of the bars due to their own weight when inserting them into the mold cavity and to thereby possibly avoid difficulties which could arise when the bars and inflation tubes are threaded into the openings in the opposite end wall of the mold.
  • the inflation hoses are integrally connected at one end to a plate made of the same material.
  • Fig. 1 the stand of a ceramic press is designated 10.
  • tie rods 12 protrude from this stand 10. These tie rods 12 are connected to one another at their upper end by a press yoke 14.
  • a press bear 16 is guided vertically on the tie rods 12 and can be moved up and down by a hydraulic ram 18.
  • a lower mold end wall 20 is stretched on the press stand 10.
  • An upper mold end wall 22 and a group of vertical, inflatable tube-covered rods 24 are arranged on the press bear 16. The bars 24 with the inflation hoses are laterally spaced apart.
  • two mold shell halves 26a and 26b are further attached, which together form a mold shell 26.
  • the mold shell halves 26a and 26b are adjustable by hydraulic auxiliary presses 28a and 28b between a mold opening position shown in FIG. 1 and a mold shell closing position shown in FIG. 2.
  • Centering mandrels 30 are attached to the press bar 16 and, when the press bar 16 goes down with the mold jacket 26 closed, ends around the upper mold to place wall 22 on the molded jacket 26, engage in blind holes 32 of the molded jacket 26.
  • the press bar 16 moves downward, so that the inflatable tube-covered rods 24 move into the mold cavity 34 formed within the mold jacket 26 (FIG. 2). Then the mold cavity 34 is filled with this molding compound by sucking in powdered molding compound.
  • the inflation hoses, which surround the rods 24, are then inflated, so that a honeycomb-shaped compact is formed.
  • FIGS. 4, 5 and 6 Further details are shown in FIGS. 4, 5 and 6.
  • the upper mold end wall 22 is fastened to the press bear 16 by means of spacers 36. Within the spacers 36 two interconnected pressure plates 38 and 40 are attached. The centering pins 30 are connected to these pressure plates 38 and 40. The lower pressure plate 38 is perforated many times for receiving the rods 24. Likewise, as can be seen from FIG. 4, the upper mold end wall 22 is perforated many times for the passage of the rods 24. Between the pressure plate 38 and the upper mold end wall 22 there is a flat disk-shaped one Chamber formed for receiving a squeeze plate 42, which is formed between a squish surface 44 of the upper mold end wall 22 and a squish surface 38a of the pressure plate 38. A fluid supply chamber 46 is formed between the two pressure plates 38 and 40 and is connected to a fluid supply channel 48. The pressure plates 38 and 40 can be adjusted up and down by an auxiliary stamp 50.
  • the rods 24 are covered by inflation hoses 52. It can be seen that the rods 24 and the tubes 52 extend to the top of the pressure plate 38, that is to say both the upper mold end wall 22 and the squeeze plate 42 and the lower pressure plate 38 pass through in bores.
  • the inflation hose ends open at the top are in communication with the fluid supply chamber 46.
  • rods 24 are provided with inner channels 54 and 54a, which are also in communication with the fluid supply chamber 46 and bring fluid to the inside of the inflation hoses 52.
  • two pressure plates 56 and 58 are guided through an auxiliary stamp 60, specifically by means of mandrels 62, which can also engage in blind holes in the mold jacket when the mold jacket 26 is closed, in order to additionally press against this pressure hold together.
  • a squeeze plate 64 is received between the upper pressure plate 56 and the lower mold end wall 20, specifically between a squeeze surface 66 of the mold end wall 20 and a squeeze surface 56a of the pressure plate 56.
  • the rods and inflation tubes also penetrate the lower mold end wall 20, the lower squeeze plate 64 and the pressure plate 56; the lower ends of the channels 54 communicate with a lower fluid supply chamber 68.
  • the fluid supply chamber 68 is connected to a fluid supply line 70.
  • the upper mold end wall 22 is provided with an annular seal 72 for placement on the mold jacket 26; the shaped jacket 26 is provided with sealing elements of semi-ring shape, which are denoted by 74 and rest on the lower mold end wall 20.
  • a vacuum line 76 is connected to the shaped jacket, in the region of the shaped jacket half 26a, which leads to an annular gap 78 or a plurality of suction openings 78 distributed in a ring.
  • a molding material supply channel 80 is connected to the upper mold end wall 22 and is connected to a fluidizing air supply line 82 (cf. FIG. 9).
  • the molding material supply line 80 opens into a molding material supply bore 84, which has an opening 86 in the molding cavity 34. This opening 86 can be closed by a stamp 88. Several such molding material feeds can be arranged distributed over the circumference.
  • the device is initially in the position shown in FIG. 1.
  • the molded jacket 26 is first closed.
  • the pressbear 16 then moves downward, the inflatable tube-covered rods 24 passing through the perforations of the lower mold end wall 20, the squeeze plate 64 and the pressure plate 56.
  • the inflatable tube-covered rods 24 are held on the bear 16 in that the squeeze plate 42 is squeezed between the squeeze surfaces 38 a and 44.
  • the squeeze plate 64 is relieved, so that the bars with the inflatable tubes 52 can pass through the perforations of the lower squeeze plate 64 unhindered.
  • the lower squeeze plate 64 is squeezed by means of the auxiliary stamp 60 and the upper squeeze plate 42 is relieved.
  • the rods 24 are now fixed in the longitudinal direction by the lower squeeze plate 64.
  • the mold cavity 34 is now filled with molding compound by applying a vacuum to the mold cavity 34 through the gap 78 and the sealing die 88 being pulled.
  • the molding compound By sucking the molding compound into the mold cavity 34, the latter is also completely filled and pre-compressed between the rods 24.
  • a vacuum must also be applied to the inside of the inflation hoses via the pressure fluid supply lines 48 and 70, so that they do not stand out from the rods 24 under the effect of the vacuum in the mold cavity can.
  • the molding compound sucked into the mold cavity is already somewhat pre-compressed by the relatively high impact speed of the molded particles, although this is done by adjusting the impact points speed at least at the beginning of the filling process, care must be taken to ensure that the suction openings 78 are not blocked.
  • the vacuum applied to the inner surfaces of the inflation hoses 52 is turned off and then pressure is applied via lines 48 and 70 and the fluid supply chambers 46 and 68 to the inner surfaces of the inflation hoses 52, partly via the channels 54, 54a , partly over the open ends of the tubes 52.
  • the inflatable tubes are inflated and compact the filled molding compound within the mold cavity 34.
  • the rods 24 cannot change their position laterally since they are secured in the perforations of the end walls 20 and 22 against lateral movement are.
  • the fluid pressure is reduced again through the two fluid lines 48 and 70, so that the inflation hoses now return to their position, which is snug against the rods 24.
  • the squeeze plate 64 is relieved and the squeeze plate 42 is squeezed again.
  • the press bear can then move upwards, taking the rods with them, which are pulled out of the perforations of the pressure plate 56, the squeeze plate 64 and the lower end wall 20 of the mold.
  • mold shell halves 26a and 26b are moved apart so that the finished compact can be removed.
  • the filling of the inflation hoses can also be supported in that the rods 24 are provided with surface grooves 90, which prevent the inflation hoses from being inadvertently closed when the fluid hoses are applied by tightly fitting them against the rods 24.
  • the mold jacket 126 is a one-piece, annularly closed mold jacket which is lined on the inside by a ring membrane 192, the ring membrane 192 being able to be subjected to a vacuum on its rear side via a fluid supply system 194 when the mold cavity is filled and can be pressurized when the molding compound is pressed.
  • a fluid supply system 194 when the mold cavity is filled and can be pressurized when the molding compound is pressed.
  • the mold shell halves 26a and 26b can be provided with profiles, for example profiles which result in holding elements or a holding flange for the molding. These profiles must of course be shaped so that they take into account the direction of removal.
  • the projections can be arranged either close to the edge or between the edges of the mold shell halves 26a, 26b.
  • profiles can be provided in the molded jacket 126 and in the membrane 192, in order to also produce profiles on the molded article. If these profilings extend parallel to the jacket axis over the entire length of the inner surface of the molded jacket 126, this does not cause any difficulties in the demolding. However, it is also possible to apply profilings to the inner surface of the molded jacket 126 and to the membrane in order to allow corresponding profilings to be formed on the molded article if these profilings do not extend over the entire height of the molded jacket 126, but for example at a distance from the upper edge and lower edge end of the molded jacket, or to provide profiles which produce ribs or the like running on the molded article in the circumferential direction.
  • FIG. 10 differs from that of FIG. 5 in that the inflatable hoses 52 are designed differently.
  • the inflatable hoses 52 are closed at their lower ends.
  • the channels 54 are likewise closed at their lower ends.
  • the inflation hoses 52 are integrally connected at their upper ends to a plate 52x made of the same material. In this way, the sealing problem for the pressure medium to be introduced into the inflation hoses 52 is solved in the simplest way.
  • the powdery molding compound used can in particular be a spray grain compound which has been produced as follows:
  • a slip containing 40% by weight water and 60% by weight solid was processed.
  • a dry mass was produced which consisted of 50% by weight kaolinite, 25% by weight feldspar and 25% by weight quartz, the percentages in each case based on the Ge velvet dry matter, consisted.
  • the grain size of the kaolinite was max. 25 g.
  • the grain size of feldspar and quartz was max. 63 ⁇ .
  • Feldspar and quartz were introduced in the form of a pegmatite, which contains both the feldspar and the quartz.
  • the dry matter was processed into a suspension or a slip with the addition of the water. This slip was then sprayed through spray nozzles into a hot gas atmosphere.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Press-Shaping Or Shaping Using Conveyers (AREA)
  • Filtering Materials (AREA)
  • Catalysts (AREA)

Claims (31)

1. Procédé de fabrication d'ébauches moulées, pourvues de conduits, à partir d'une matière à mouler, au cours duquel, dans une cavité de moulage (34), remplie de la matière à mouler et traversée par des barreaux (24) entourés de tuyaux gonflables (52), ces derniers sont expansés sous l'effet de la pression du fluide envoyé sur leurs faces intérieures, par compactage de la matière à mouler, pour donner l'ébauche moulée et après suppression de la pression du fluide, les barreaux (24) recouverts sont extraits de l'ébauche moulée et celle-ci est enlevée de la cavité de moulage (34), caractérisé en ce que la matière à mouler pulvérulente est chargée dans la cavité de moulage (34), tandis que les tuyaux gonflables (52) s'appliquent, sur leurs sections longitudinales situées à l'intérieur de la cavité de moulage (34), contre les barreaux (24).
2. Procédé selon la revendication 1, caractérisé en ce qu'on soumet à la pression d'un fluide, une membrane (192), déliminant au moins partiellement la cavité de moulage (34) sur le côté éloigné de la matière à mouler, en particulier en même temps qu'on soumet les tuyaux gonflables (52) à la pression d'un fluide.
3. Procédé selon la revendication 1 ou 2, caractérisé en ce qu'après suppression de la pression du fluide dans les tuyaux gonflables (52) et éventuellement contre la membrane (192), on extrait tout d'abord les barreaux puis on enlève l'ébauche moulée de la cavité de moulage (34).
4. Procédé selon l'une quelconque des revendications 1 à 3, caractérisé en ce que pour introduire la matière à mouler pulvérulente dans la cavité de moulage (34), on applique un vide contre celle-ci (en 78) et on aspire ainsi la matière à mouler.
5. Procédé selon la revendication 4, caractérisé en ce que, pendant que règne une dépression dans la cavité de moulage (34), on maintient aussi une dépression sur la face intérieure des tuyaux gonflables (52) et éventuellement aussi sur le côté de la membrane (92), éloigné de la matière à mouler, afin de maintenir les tuyaux gonflables (52) en contact avec les barreaux (24) et éventuellement la membrane (92) en contact avec l'enveloppe de moulage (126).
6. Procédé selon l'une quelconque des revendications 1 à 5, caractérisé en ce qu'on utilise, comme matière à mouler pulvérulente, une matière céramique.
7. Dispositif destiné à la fabrication d'ébauches moulées pourvues de conduits, à partir d'une matière à mouler pulvérulente, comportant une cavité de moulage (34), à l'intérieur de celle-ci un groupe de barreaux (24) qui sont entourés par des tuyaux gonflables (52), au moins sur une partie de leur longueur, un dispositif de remplissage (78, 80, 82, 84, 86, 88) pour remplir la cavité de moulage (34) avec la matière à mouler pulvéruleante et un dispositif d'amenée du fluide (48, 46) pour l'amenée du fluide sous pression à la face intérieure des tuyaux gonflables (52), caractérisé en ce que les tuyaux gonflables (52) s'appliquent, à l'état de repos, c'est-à-dire avant application de la pression du fluide, contre les barreaux (24), par leurs sections longitudinales, logées à l'intérieur de la cavité de moulage (34).
8. Dispositif selon la revendication 7, caractérisé en ce que la cavité de moulage (34) est délimitée, au moins en partie, par une membrane (192) pouvant être soumise à une pression.
9. Dispositif selon la revendication 7 ou 8, caractérisé en ce que les barreaux (24) sont parallèles entre eux.
10. Dispositif selon la revendication 9, caractérisé en ce que la membrane (192) est une membrane d'enveloppe (192) avec génératrice parallèle aux barreaux (24).
11. Dispositif selon l'une quelconque des revendications 7 à 10, caractérisé en ce que les barreaux (24) sont fixés à leurs extrémités, au moins perpen- diculairemet à leur direction longitudinale, par rapport à la cavité de moulage (34), pendant que les tuyaux gonflables (52) et éventuellement la membrane (192) sont soumis à une pression.
12. Dispositif selon l'une quelconque des revendications 7 à 11, caractérisé en ce qu'on prévoit, pour l'introduction et l'extraction commune des barreaux (24) dans la cavité de moulage (34) ou hors de celle-ci, un support de barreaux (22, 38, 40, 42, 50) et un entraînement linéaire (16, 18) pour ce support.
13. Dispositif selon la revendication 12, caractérisé en ce qu'une paroi terminale (22) de la cavité de moulage (34), tournée vers le support de barreaux et perforée pour le passage des barreaux, est reliée au support de barreaux pour leur déplacement commun, par l'entraînement linéaire (16, 18).
14. Dispositif selon l'une quelconque des revendications 7 à 13, caractérisé en ce que les tuyaux gonflables (52) dépassent de la cavité de moulage (34), par des sections terminales soumises d'un côté à la pression du fluide et en ce que ces sections terminales sont logées dans la paroi terminale de moule (20, 22) respective, par des conduits d'appui les entourant étroitement.
15. Dispositif selon l'une quelconque des revendications 7 à 14, caractérisé en ce que les tuyaux gonflables (52) traversent, à une extrémité au moins, avec les barreaux (24), une plaque d'écrasement (42; 64), pouvant être écrasée entre deux surfaces d'écrasement (38a, 44; 56a, 66) et qui peut être écrasée dans la région de l'extrémité respective et/ou de la fixation des tuyaux gonflables (52) et des barreaux (24), dans la région de leur extrémité respective, pour assurer l'étanchéité des tuyaux gonflables (52).
16. Dispositif selon la revendication 15, caractérisé en ce que la plaque d'écrasement (42, 64) est logée entre une surface (44; 66) éloignée de la cavité de moulage, de la paroi terminale de moule (22; 20) respective, perforée et une plaque de compression (38; 56) perforée.
17. Dispositif selon l'une quelconque des revendications 7 à 16, caractérisé en ce que les tuyaux gonflables (52) sont raccordés ou raccordables, par au moins une extrémité, à une chambre d'alimentation de fluide (46; 68).
18. Dispositif selon la revendication 17, caractérisé en ce que les tuyaux gonflables (52) sont ouverts au moins à une extrémité, l'extrémité ouverte communiquant avec la chambre d'alimentation de fluide (46; 68).
19. Dispositif selon la revendication 18, caractérisé en ce que les tuyaux gonflables (52) s'élargissent en forme d'entonnoir à leurs extrémités ouvertes (en 52a).
20. Dispositif selon la revendication 18 ou 19, caractérisé en ce que les barreaux (24) présentent, sur leur surface, des rainures d'alimentation de fluide (90) et/ou à l'intérieur, des conduits d'alimentation de fluide (54, 54a).
21. Dispositif selon la revendication 17, caractérisé en ce que les tuyaux gonflables (52) sont fermés aux deux extrémités, à savoir sur au moins une extrémité, par l'intermédiaire du barreau (24) respectif et en ce que les surfaces intérieures des tuyaux gonflables (52) communiquent avec la chambre d'alimentation de fluide (46; 68), par des conduits d'alimentation de fluide (54, 54a) se trouvant à l'intérieur des barreaux (24).
22. Dispositif selon l'une quelconque des revendications 15 à 20, caractérisé en ce qu'on prévoit une plaque d'écrasement (42; 64), sur les deux parois terminales de moule (22, 20), une plaque d'écrasement (42) étant écrasée pour l'introduction et l'extraction des barreaux (24) dans la cavité de moulage (34) ou hors de celle-ci et étant déchargée pour le gonflage et l'autre plaque (64) étant déchargée lors du déplacement des barreaux (24) et écrasée, pendant le gonflage des tuyaux gonflables (52).
23. Dispositif selon l'une quelconque des revendications 7 à 22, caractérisé en ce que la cavité de moulage (34) est pourvue de moyens d'aspiration d'air (76, 78) et d'au moins une ouverture de remplissage de matière à mouler (86) et en ce qu'éventuellement on prévoit, pour appliquer les tuyaux gonflables (52) contre les barreaux (24) et la membrane (192) contre l'enveloppe de moulage (126), des moyens destinés à appliquer un vide contre la face intérieure des tuyaux gonflables (52) et contre le côté de la membrane (192), éloigné de la matière à mouler.
24. Dispositif selon la revendication 23, caractérisé en ce que les moyens d'aspiration d'air comportent une fente continue ou une rangée continue d'ouvertures (78) le long de la jointure entre une paroi terminale de moule (20) et une enveloppe de moule (26) et en ce qu'au moins une ouverture de remplissage de matière à mouler (86) est placée dans la région de jointure entre l'enveloppe de moule (26) et une paroi terminale de moule (22) opposée.
25. Dispositif selon l'une quelconque des revendications 7 à 24, caractérisé en ce que la cavité de moulage (34) possède une enveloppe de moule (26), subdivisée au moins deux fois.
26. Dispositif selon l'une quelconque des revendications 7 à 24, caractérisé en ce que la cavité de moulage (34) comporte une enveloppe de moule (126) fermée et une membrane d'enveloppe (192) prenant appui contre la face intérieure de l'enveloppe de moule (126).
27. Dispositif selon l'une quelconque des revendications 23 à 26, caractérisé en ce que l'ouverture de remplissage de la matière à mouler (86) est ferma- ble par un poinçon de fermeture (88) avec une surface terminale, adaptée à la forme de la cavité de moulage (34).
28. Dispositif selon l'une quelconque des revendications 7 à 27, caractérisé en ce que les barreaux (24) s'étendent à peu près verticalement à l'intérieur de la cavité de moulage (34) et peuvent être extraits de celle-ci, vers le haut.
29. Dispositif selon la revendication 28, caractérisé en ce que les moyens d'aspiration d'air (78) sont placés dans la région inférieure et l'ouverture de remplissage (86) dans la région supérieure de la cavité de moulage (34).
30. Dispositif selon l'une quelconque des revendications 7 à 29, caractérisé en ce qu'on place sur la face intérieure de la cavité de moulage (34) et éventuellement sur une membrane, s'appliquant contre cette face intérieure, des profilés qui produisent des reliefs et/ou des creux sur la face extérieure de la pièce moulée, en particulier des reliefs ou des creux qui confèrent à la pièce moulée, une surface de forme autre que cylindrique ou prismatique.
31. Dispositif selon l'une quelconque des revendications 7 à 30, caractérisé en ce que les tuyaux gonflables (52) sont réalisés d'une seule pièce, à l'une de leurs extrémités, avec une plaque (52x), réalisée dans le même matériau.
EP86115404A 1985-11-29 1986-11-06 Procédé et dispositif pour fabriquer des pièces de moulées munies conduits et en poudre moulable, notamment en matière moulable céramique, dénomination typique: honeycomb Expired - Lifetime EP0228538B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT86115404T ATE57128T1 (de) 1985-11-29 1986-11-06 Vefahren und einrichtung zur herstellung von mit kanaelen versehenen presslingen aus pulverfoermiger formmasse, insbesondere keramischer formmasse stichwort: honeycomb.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3542332 1985-11-29
DE19853542332 DE3542332A1 (de) 1985-11-29 1985-11-29 Verfahren und einrichtung zur herstellung von mit kanaelen versehenen presslingen aus pulverfoermiger formmasse, insbesondere keramischer formmasse stichwort: honeycomb

Publications (2)

Publication Number Publication Date
EP0228538A1 EP0228538A1 (fr) 1987-07-15
EP0228538B1 true EP0228538B1 (fr) 1990-10-03

Family

ID=6287245

Family Applications (1)

Application Number Title Priority Date Filing Date
EP86115404A Expired - Lifetime EP0228538B1 (fr) 1985-11-29 1986-11-06 Procédé et dispositif pour fabriquer des pièces de moulées munies conduits et en poudre moulable, notamment en matière moulable céramique, dénomination typique: honeycomb

Country Status (6)

Country Link
US (3) US4853170A (fr)
EP (1) EP0228538B1 (fr)
JP (1) JPS62216703A (fr)
AT (1) ATE57128T1 (fr)
DD (1) DD252573A5 (fr)
DE (2) DE3542332A1 (fr)

Families Citing this family (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5200125A (en) * 1988-12-24 1993-04-06 T&K International Laboratory, Ltd. Method for seal molding electronic components with resin
EP0446665A1 (fr) * 1990-03-14 1991-09-18 Asea Brown Boveri Ag Procédé de préparation d'une ébauche à partir d'une poudre métallique ou céramique
US5391533A (en) * 1993-02-19 1995-02-21 Amtx, Inc. Catalyst system for producing chlorine dioxide
US6919039B2 (en) * 1995-03-28 2005-07-19 Eric J. Lang Channel assisted resin transfer molding
US6406659B1 (en) 1995-03-28 2002-06-18 Eric Lang Composite molding method and apparatus
IT1279893B1 (it) * 1995-12-18 1997-12-18 F D S S R L Semistampo per piastrelle ceramiche perfezionato
US20020109266A1 (en) * 1999-10-26 2002-08-15 Gooden John K. Sculptor's pressure vessel
US5997274A (en) * 1997-12-10 1999-12-07 Gooden; John K. Sculptor's pressure vessel
EP0992272A1 (fr) * 1998-10-08 2000-04-12 Corning Incorporated Filtre poreux en forme d'un nid d'abeilles formé dans une presse
DE10028865C2 (de) * 2000-06-10 2002-09-26 Xcellsis Gmbh Vorrichtung zur katalytischen Wasserstofferzeugung aus Kohlenwasserstoffen
FR2818578B1 (fr) * 2000-12-26 2003-03-21 Snecma Moteurs Procede de fabrication de structures en nid d'abeilles et outillage pour une telle fabrication
US6524504B2 (en) * 2001-01-04 2003-02-25 Masonite Corporation Method of producing cellulosic article having increased thickness, and product thereof
ES2223264B1 (es) * 2003-03-05 2005-12-16 Pablo Peris Dominguez Procedimiento de obtencion de piezas ceramicas con perforaciones y dispositivo correspondiente.
EP4324338A3 (fr) * 2018-08-10 2024-04-24 Soremartec S.A. Procédé d'application de matériau granulaire sur une face externe d'un produit alimentaire
DE102019100894B3 (de) * 2019-01-15 2020-04-23 Borgwarner Ludwigsburg Gmbh Zündspule

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20460A (en) * 1858-06-01 Improvement in the manufacture of pliers
FR619690A (fr) * 1926-07-22 1927-04-07 Machine à mouler pour agglomérés
DE938775C (de) * 1947-10-11 1956-02-09 Antonio Vittorio Locatelli Verfahren und Vorrichtung zur Bildung von verdichteten Bauelementen
DE882973C (de) * 1949-06-30 1953-07-13 Emil Metzger Verfahren zur Herstellung von hohlen Bauelementen
DE1016178B (de) * 1953-08-10 1957-09-19 Eugen Wiest Dipl Ing Vorrichtung zum Pressen von Hohlbausteinen
US3015855A (en) * 1958-02-01 1962-01-09 Merkel Ewald Method of and device for making hollow bodies
DE1529836B1 (fr) * 1967-07-19 1970-06-25
US3561079A (en) * 1968-03-11 1971-02-09 Robinson Clay Product Co The Apparatus for pressing of clay pipe using an elastomeric mandrel
JPS5024453B2 (fr) * 1971-09-08 1975-08-15
US3790654A (en) * 1971-11-09 1974-02-05 Corning Glass Works Extrusion method for forming thinwalled honeycomb structures
DE2627160C3 (de) * 1976-06-16 1984-08-30 Dorst-Keramikmaschinen-Bau Otto Dorst u. Dipl. Ing. Walter Schlegel, 8113 Kochel Verfahren zum Herstellen von Tellern o.dgl. mittels einer Presse sowie Presse zur Durchführung des Verfahrens
US4473526A (en) * 1980-01-23 1984-09-25 Eugen Buhler Method of manufacturing dry-pressed molded articles

Also Published As

Publication number Publication date
US5120213A (en) 1992-06-09
US4853170A (en) 1989-08-01
DE3674751D1 (de) 1990-11-08
DE3542332A1 (de) 1987-06-04
US5039296A (en) 1991-08-13
DD252573A5 (de) 1987-12-23
ATE57128T1 (de) 1990-10-15
EP0228538A1 (fr) 1987-07-15
JPS62216703A (ja) 1987-09-24

Similar Documents

Publication Publication Date Title
EP0228538A1 (fr) Procédé et dispositif pour fabriquer des pièces de moulées munies conduits et en poudre moulable, notamment en matière moulable céramique, dénomination typique: honeycomb
DE3144678A1 (de) Verfahren und einrichtung zur herstellung von formlingen aus einer rieselfaehigen masse
EP0551634B1 (fr) Procédé et dispositif pour la fabrication de briques creuses
DE69023268T2 (de) Einrichtung und Verfahren zum Giessen gegen die Schwerkraft.
DE2145006B2 (de) Verfahren und vorrichtung zum herstellen von formkoerpern mit wandoeffnungen oder -schlitzen durch isostatisches pressen von pulvern
EP0789644B1 (fr) Dispositif de circulation d'un fluide entre un volume delimite par une surface solide et un canal, et procede de fabrication de ce dispositif
DE2236585A1 (de) Verfahren und vorrichtung zur herstellung eines heissgepressten teiles
DE3517463C1 (de) Isostatische Pressform zur Herstellung von Formlingen aus keramischer Masse
DE3341959C1 (de) Vorrichtung zur Herstellung von Formlingen aus trockener,rieselfaehiger Formmasse,insbesondere keramischer Formmasse Stichwort:Kombiniertes Fuell-,Press- und Entnahmewerkzeug
DE4320860C2 (de) Presse zum Vakuum-Formen von Platten oder Blöcken aus körnigem Stein- oder Keramikmaterial
EP0521179A1 (fr) Procédé et dispositif pour la fabrication des éléments filtrants tubulaires
DE3024683A1 (de) Kunststoffbecher sowie verfahren und tiefziehwerkzeug zu seiner herstellung
DE19655149C2 (de) Verfahren zur Herstellung trockengepreßter Formlinge
EP0255719B1 (fr) Dispositif et procédé pour fabriquer des pièces moulées creuses de forme conique ou cylindrique, en particulier tasses avec une anse
EP0644819B1 (fr) Outil de moulage isostatique par compression de recipients a anses
EP0695611B1 (fr) Procédé et dispositif pour la fabrication d'éléments pressés de forme tubulaire et profilés à partir d'un matériau à l'état plastique comme l'argile ou similaire
DE29500253U1 (de) Vorrichtung zur Herstellung eines Rohrs aus Schüttgut
DE2155571A1 (de) Verfahren und vorrichtung zum trockenpressen von keramischen waren
EP0480430B1 (fr) Procédé et dispositif pour la fabrication d'objets creux en céramique avec appendice latéral, en particulier de tasses avec anse
DE1459330B1 (de) Verfahren und Vorrichtung zum Pressen von Tonrohren
EP2386395B1 (fr) Procédé et dispositif pour la fabrication d'éléments en béton partiellement ouverts
DE1459330C (de) Verfahren und Vorrichtung zum Pressen von Tonrohren
DE3877736T2 (de) Verfahren und vorrichtung zur herstellung von giessformen mit granuliertem material.
DE2939134A1 (de) Verfahren und vorrichtung zum isostatischen pressen von keramischen gegenstaenden
DE2825611A1 (de) Verfahren und pressform zum herstellen vorzugsweise duennwandiger gerader rohrstuecke aus keramischen werkstoffen

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

17P Request for examination filed

Effective date: 19871106

17Q First examination report despatched

Effective date: 19880811

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE CH DE ES FR GB GR IT LI LU NL SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GR

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19901003

REF Corresponds to:

Ref document number: 57128

Country of ref document: AT

Date of ref document: 19901015

Kind code of ref document: T

ITF It: translation for a ep patent filed
REF Corresponds to:

Ref document number: 3674751

Country of ref document: DE

Date of ref document: 19901108

GBT Gb: translation of ep patent filed (gb section 77(6)(a)/1977)
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: ES

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19910114

ET Fr: translation filed
PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

26N No opposition filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: GB

Payment date: 19911024

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 19911025

Year of fee payment: 6

Ref country code: FR

Payment date: 19911025

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: CH

Payment date: 19911030

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 19911106

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: BE

Payment date: 19911120

Year of fee payment: 6

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: LU

Payment date: 19911129

Year of fee payment: 6

ITTA It: last paid annual fee
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: NL

Payment date: 19911130

Year of fee payment: 6

EPTA Lu: last paid annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 19921106

Ref country code: GB

Effective date: 19921106

Ref country code: AT

Effective date: 19921106

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Effective date: 19921107

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LI

Effective date: 19921130

Ref country code: CH

Effective date: 19921130

Ref country code: BE

Effective date: 19921130

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 19921204

Year of fee payment: 7

BERE Be: lapsed

Owner name: BUHLER EUGEN

Effective date: 19921130

Owner name: HUTSCHENREUTHER A.G.

Effective date: 19921130

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: NL

Effective date: 19930601

GBPC Gb: european patent ceased through non-payment of renewal fee

Effective date: 19921106

NLV4 Nl: lapsed or anulled due to non-payment of the annual fee
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Effective date: 19930730

REG Reference to a national code

Ref country code: CH

Ref legal event code: PL

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Effective date: 19940802

EUG Se: european patent has lapsed

Ref document number: 86115404.5

Effective date: 19930610

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES;WARNING: LAPSES OF ITALIAN PATENTS WITH EFFECTIVE DATE BEFORE 2007 MAY HAVE OCCURRED AT ANY TIME BEFORE 2007. THE CORRECT EFFECTIVE DATE MAY BE DIFFERENT FROM THE ONE RECORDED.

Effective date: 20051106