WO2014029483A1 - Procédé de production de corps frittés et dispositif de production - Google Patents

Procédé de production de corps frittés et dispositif de production Download PDF

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Publication number
WO2014029483A1
WO2014029483A1 PCT/EP2013/002474 EP2013002474W WO2014029483A1 WO 2014029483 A1 WO2014029483 A1 WO 2014029483A1 EP 2013002474 W EP2013002474 W EP 2013002474W WO 2014029483 A1 WO2014029483 A1 WO 2014029483A1
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WO
WIPO (PCT)
Prior art keywords
layer
stack
binder
particles
layer stack
Prior art date
Application number
PCT/EP2013/002474
Other languages
German (de)
English (en)
Inventor
Gustav Thorban
Original Assignee
Gte Gesellschaft Für Technische Entwicklungen Satteldorf Verwaltungs-Gmbh
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 Gte Gesellschaft Für Technische Entwicklungen Satteldorf Verwaltungs-Gmbh filed Critical Gte Gesellschaft Für Technische Entwicklungen Satteldorf Verwaltungs-Gmbh
Publication of WO2014029483A1 publication Critical patent/WO2014029483A1/fr

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B18/00—Layered products essentially comprising ceramics, e.g. refractory products
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/632—Organic additives
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/622—Forming processes; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/626—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B
    • C04B35/63—Preparing or treating the powders individually or as batches ; preparing or treating macroscopic reinforcing agents for ceramic products, e.g. fibres; mechanical aspects section B using additives specially adapted for forming the products, e.g.. binder binders
    • C04B35/638—Removal thereof
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/48—Organic compounds becoming part of a ceramic after heat treatment, e.g. carbonising phenol resins
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/60—Aspects relating to the preparation, properties or mechanical treatment of green bodies or pre-forms
    • C04B2235/602—Making the green bodies or pre-forms by moulding
    • C04B2235/6026—Computer aided shaping, e.g. rapid prototyping

Definitions

  • the invention relates to a method for producing sintered bodies and a device for its implementation.
  • One way of producing sintered bodies of a predetermined geometry is that bringing the material to be sintered in par ⁇ tikelform and mixed with a binder.
  • the mixture of particles and binders can then be treated so that it forms a moldable mass, which can be, for example, gegos ⁇ sen, injection molded or pressed.
  • Green compacts are thus obtained which are handleable and have a geometry which is related to the desired final geometry of the product such that the latter is obtained after sintering.
  • These green compacts are typically brought to an elevated temperature prior to sintering at which the binder pyrolyzes ,
  • the present invention is intended to provide a method and a device which enable an improved production of sintered bodies.
  • the green compact is produced from a plurality of superimposed material layers, which in each case comprise binders and particles. These layers can be produced with constant edge contours or from one layer to the next and / or from one layer group to a next changing edge contour. It is thus possible to produce prismatic bodies and bodies with a cross-sectional geometry which changes in the axial direction of the product. , In particular, one can also produce such products in which the cross section increases and decreases in the axial direction, so that undercuts of the product surface result.
  • the green product and / or the sintered products also have a chemical layer structure.
  • the method according to claim 2 is advantageous in view of the advantage of very thin individual material layers at low cost produce. Also, printing forms which dictate the geometry of an applied printed material layer can easily be reprographically produced with high precision. Alternatively, instead of printing plates and movable printheads can be used, the electronically controlled release ink droplets.
  • the mentioned in claim 4 printing method is in view of particularly simple production of the printing form, in terms of reliability of the printing process at high printing frequencies and in terms of easy cleaning of the printing form advantage.
  • the printing form itself does not come into contact with particles. This is in terms of low wear of the printing plate and low pollution of the printing plate in operation advantageous.
  • the development of the invention according to claim 6 is advantageous in view of a constant particle density in a newly applied material layer.
  • the base on each of which a new material layer is applied, has greater stability than a newly applied layer, which is advantageous in terms of sticking to the new layer of material. Also, the permeability of a particle-containing material layer for heat and IR and UV light and Elektronenestrah len is reduced, so you can not dry a finished stack easily in a short time evenly and / or harden.
  • the individual material layers are separated from a pre-prepared pre-dried product. This allows a particularly precise determination of the edge contour of the individual layers.
  • the finished layer stack has better homogeneity and has plane-parallel end surfaces.
  • the force is chosen with regard to the respective strength of the material of the green compact and not be so high that a significant cross-sectional enlargement of the layer stack takes place in a direction perpendicular to the applied force (transverse) direction. If, for material reasons, such a strong application of force to the finished layer of stacks would be necessary, the corresponding contour enlargement would have to be compensated for during the production of the individual material layers, for example by using correspondingly precompensating printing plates. With the development according to claim 13 it is achieved that irregularities obtained in the layer stack are equally compensated for each application of a material layer.
  • the apparatus set forth in claim 16 allows automated production of layer stacks of individual material layers comprising particles held by a binder layer.
  • the application of a layer of material takes place on an incipient layer stack under constant geometric conditions.
  • This maintenance of constant geometric conditions in the generation of successive layers is carried out automatically in the apparatus according to claim 18. This can be done simply by counting in a controller of the device the number of layers that have already been stacked to form a stack.
  • the first device that creates the multiple layers on the stacks one may provide a sensor that measures the current height of the stack being re-coated and controls the working head of the first working device to have a predetermined height above the stack surface , In this case, the controlled variable used in the first device can also be forwarded to the other devices and used there to track the distance between the top of the stack and the working head.
  • a stack support means in the direction of the stack axis is adjustable so that the distance between the working head of the first device and the stack surface is kept constant. In particular, this may be done similarly as described above for the working head.
  • the device according to the invention can be varied so that it has different effective working times for different jobs with the same basic cycle time. This is done so that one carries out the same step at a plurality of stack-conveying direction successive stations. These may be drying steps that take more time than a layer-forming step. So you can increase the overall frequency with which the layer stacks are generated.
  • the development of the invention according to claim 22 makes it possible to combine a larger number of devices that participate in the production of a layer stack in a compact space. Alternatively, one may also use linear arrays of devices and run the conveyor carrying the layer stacks through the various devices for a sawtooth characteristic. Such linear arrangements have the advantage that they can easily be extended by a further station, which is necessary for the production of a particular product.
  • a plan view of a stacker manufacturing apparatus obtained by closing the apparatus shown in FIG. 1 to a circle;
  • FIG. 1 A flow chart illustrating the operation of a manufacturing apparatus according to Figures 1 and 2;
  • FIG. 8 a schematic representation of a device
  • FIG. 9 shows a block diagram with reference to which the formation of layer stacks from a material band is explained;
  • Figure 10 A modified workstation with a height-adjustable stack support;
  • Figure 11 A schematic representation of a material layer, which was obtained by juxtaposition of material strands.
  • Figure 12 A schematic plan view of the underside of a
  • 10 denotes a base plate of a machine frame, which carries a support table 12 linearly displaceable via bearings, not shown.
  • This is by a symbolically indicated only drive 14 in Figure 1 in horizontalerr back and forth, said drive comprising a sensor which measures the actual position of the support table 12.
  • each include a mounting plate 18, with which they are screwed onto the top of the support table 12, a guide column 20 which is vertically mounted on the mounting plate 18, and a generally designated 22 working head which slidably on the guide column 20 runs.
  • a threaded spindle 24 which is driven by an electric motor 26 and tet together with a spindle nut, not shown, which is provided in the working head 22.
  • the electric motor 26 is mounted on an upper end plate 28 which is fixedly connected to the upper end of the guide column 20.
  • a position sensor 30 is also placed, which cooperates with the motor shaft and thus generates a vertical position of the working head 22 associated output signal.
  • the working head 22 in turn consists of a slide member 32 which runs on the guide column 20, and a working part 34 which is placed on the underside of the slide member 32.
  • the working parts 34 of the different working units 16 can carry out different or identical work, as will now be explained below using the example of the production of layer stacks comprising superposed layers comprising a binder and particles carried by it.
  • the working units 16 in the considered embodiment have the same basic mechanical structure, but differ in the nature and operation of their working head 22. In this way, one can easily convert the working units 16 from one function to another function in case of need by only the corresponding working head 22 replaced by another.
  • a lowermost layer 36 of an emerging layer stack 38 is carried on the support table 16.
  • the working head 22-1 is one which produces a layer of binder and particles and deposits in a lower end position on a then standing on a lower surface, which is the surface of the support table 12th may act (beginning of stacking) or the top of a nascent layer stack 38 may act during stack expansion). Examples of working heads 22-1 which can produce such layers will be described in more detail later.
  • FIG. 1 shows the working unit 16-1 at a time when it prepares to generate and deposit another layer.
  • the working unit 16-2 further downstream by one pitch has a working head 22-2 which is a drying head.
  • this dry head is a hot air dispensing dry head.
  • the working unit 16-3 again has the same mechanical structure as the working unit 16, but its working head 22-3 is now an IR dry head.
  • the working unit 16-4 is one in which the working head 22-4 has a polished pressing plate.
  • the working unit 16-5 again has the same mechanical structure as the working units described above, but its working head 22-5 is now one which emits UV light.
  • 16 binders are cured in the working unit, which are brought by UV radiation for crosslinking.
  • the working unit 16-1 lays a further material layer 40 onto this first material layer 36 (preferably by pad printing). When this has been done, the working unit 16 is moved one pitch further to the right, so that in the working unit 16-2 there is always a layer stack 38 which is one
  • Layer has more than the incoming in the working unit 16-1 layer stack.
  • This layer stack 38 is then dried in the working unit 16-2 with hot air. The next time the supporting table 12 is moved by one pitch, this layer of layers, predried in advance, enters the working unit 16-3 and is further dried there by IR radiation.
  • the uppermost material layer 40 is then cured with UV light.
  • the support table 12 is moved back completely in the drawing to the left, so that the foremost layer stack 38-5 now comes to lie below the working head 22-1 and is provided there with a further layer of material.
  • the device shown in FIG. 1 can be easily slimmed down for simpler working methods by simply dismantling unneeded working units 16. So you could if the hot air working unit 16-1 omit and restrict the pre-press drying of the topmost material layer to IR drying.
  • the support table 12 is now connected via spokes 42 to a hub 44 supported by a shaft 46.
  • the latter is driven by an electric motor 48, which is again coupled to a position transmitter 50.
  • the support table 16 is now driven in a single direction; However, the procedure is analogous to that which has already been described with reference to FIG.
  • FIG. 3 shows the essential steps of the method of producing sintered bodies in the form of a flow chart.
  • the various blocks of the flowchart are labeled A through I.
  • the blocks A to G relate to the production of a green body, which is formed by a finished layer stack 38.
  • a first block A it is checked whether the various layer forms have already been processed, from which the layer stack should ultimately be composed.
  • the procedure according to FIGS. 1 and 2 was concerned with obtaining a correspondingly identical particle distribution in the binder by superimposing identical layers 40, from which a prismatic end product can later be produced after pyrolysis of the binder and sintering of the particles, it is also conceivable also produce sintered products according to the method described above, the cross-section of which changes in the axial direction, so that products can be produced which have a waist.
  • blocks A it is checked whether a mold change is pending.
  • the control of the machine comprises a memory in which is stored, which printing form is to be used for which layers or layer areas. This printing form table is processed sequentially until the last printing form is used. If a printing plate change FW is to be carried out, the program in block A increases a printing forme counter ZF by one and sets a printing-layer counter ZD equal to zero.
  • the drying of the applied layer then takes place in program block C, wherein the only program block C in this case can actually control a plurality of dry working units arranged one after the other in the stack conveying direction.
  • the program block D controls the pressing of the dried
  • curing of the binder is then carried out, for example by UV radiation, electron radiation or another crosslinking radiation.
  • branch F it is checked whether the number of prints ZDS provided for the selected printing form has already been processed. If this is not the case, a jump back to program block B.
  • the program continues to a further branch G. There, it is checked whether all the cross-sectional shapes to be used have already been processed. If this is not the case, a jump back to the program block A, where a mold change FW is brought about. The various cycles then continue as described above.
  • the program proceeds to block H, where the pyrolysis PY of the binder is controlled. After completion of block H, the program then continues to block I, where the sintering of the particles (SI) takes place optionally under simultaneous pressure (PR).
  • SI sintering of the particles
  • FIG. 4 shows four material layers 40-1 to 40-4 which have the same outer diameter. However, the material of the material layers 40 of FIG. 4 is not homogeneous. Those particles which are to form the sintered body later are arranged only within a circular area 52-1 to 52-4 whose Diameter increases in Figure 4 from top to bottom. This circular area is shown dotted.
  • the circular area 54 which surrounds the circular area 52 in each case also contains a binder and preferably also sinterable particles, but these have such a chemical nature that they can be removed reactively after the sintering process, e.g. by combustion in oxygen or conversion to another reaction for which the particles forming the sintered body are resistant.
  • Discs 40-1 to 40-4 can be produced by two printing steps: a first printing step which produces the circular surface 52 and which uses an ink containing the particles desired for the sintered body. Then a second pressure step, in which the annular surface 54 is generated, wherein the binder optionally sinterable particles are added, which can then be removed after sintering reactive.
  • Figure 5 shows an example of a green compact which can be obtained by superimposing layers of material 40-1 to 40-4.
  • material layers 40 shown in FIG. 4 once from the bottom upwards and then from top to bottom in FIG. 4, a rotary body with a concave waist is obtained, as shown in FIG.
  • the white regions of the individual layers serve to support overhanging edge regions of the circular surfaces 52 of layers lying above them until the circular surfaces 52 themselves have obtained sufficient mechanical stability. It is thus also possible to produce sintered bodies which have large axial cross-sectional changes, for example bodies which have a similar geometry to a coil with a cylindrical center piece and two disk-shaped end pieces.
  • a pressure plate 56 which is adjustable by a schematically indicated drive 58 so that successively one of a plurality of printing plates 60-1 to 60-7 can be placed at a position in which a Einärbekopf 62 and a tampon head 64 are arranged.
  • the top of the printing plate 60 is polished, and in it, etching, erosion or mechanical processing of the printing plates 60 have been made. These differ in the embodiment considered here by their radius.
  • the inking head 62 comprises a color housing 66 which carries on the underside a ground sealing ring 68, which may be made of ceramic material, for example, and whose underside is ground. Within the sealing ring 68 is a color mesh 70 through which located in the interior of the color housing 66 ink can escape in small quantities.
  • the Einfärbekopf 62 between a reproduced in the drawing parking position in which the standing in his printing forme 60-4 is accessible from above, and a dotted in Figure 6 inking position displaced, in which color to the underlying Printing form 60-4 can be delivered.
  • the tampon head 64 is shown in solid print in a color pickup position in which a silicone member 76 is placed against the print form 60-4 so as to carry along ink there, and shown in phantom in its print position where it delivers ink to the stack top ,
  • the tampon head 64 After taking over the ink layer of the tampon head 64 is first lifted by the drive 74 of the pressure plate 56 and then moved in the horizontal direction over the layer stack 38, which is placed in the printing position of the working unit 16-1. During the subsequent downward movement of the tampon head 64, which represents the working head 22-1 of the working unit 16-1, the color layer carried by the silicone membrane 76 is then moved against the top of the layer stack 38, where it sticks. After lifting the tampon head 64 then the support table 12 can be moved by one pitch. It can be seen in Figure 6, that the underneath of the working unit 16-1 properties layer stack 40i-l carries a layer 40 which 40i not yet present on the layer stack.
  • FIG. 7 shows another way of producing superimposed material layers 40, each comprising a binder and metal particles.
  • the partial phases of the production of a material layer are shown in two rows.
  • a binder layer 78 is generated, which is then scattered in a second part-phase particle powder.
  • the corresponding particle layer is designated 80 in the drawing.
  • the application of the particle layer may e.g. by vibrating a screen which closes the underside of a powder container.
  • the formation of the particle layer can also be carried out by removing particles from a storage container with a metering roller, which has cells in its peripheral surface which can receive particles. It would also be possible to add the powder particles in excess to the binder layer 78 and then blow off or shake off particles not directly associated with the binder layer 78.
  • a thin binding substance is deposited via the particle layer 80.
  • the dried holding layer 82 is pressed flat against the binder layer 78, whereby the structure shown in the top row on the right, in which a part of the particles was pressed into the binder layer 78, another part of the particles in the holding layer 82nd was pressed, and the holding layer 82 at least partially rests flat against the binder layer 78.
  • the stack continues to build until it reaches the desired size.
  • the degree of drying of the binder layer 78 between the first and second sub-phases of the process described above can be used to specify the tackiness of the layer top side and to control the penetration of particles into the top side of the binder layer 78.
  • Another approach of making layer stacks will now be explained with reference to FIGS. 8 and 9.
  • a thin film 88 is produced using a doctor blade 86 a conveyor belt 90 which is driven in the direction of the arrow 90.
  • the conveyor belt is supported by a plate 92 flat.
  • IR source 94 of the material film is dried.
  • the curing takes place only so far that the resulting material 102 can still be easily punched without risk of breakage or cracking and has a certain residual tack, so that overlaid web sections adhere to one another.
  • FIG. 9 shows how material layers 40 cut out of material strip 102 can be superimposed on one another by means of a not shown punching tool.
  • a single punching tool is used, so that all ; punched-out material layers 40 have the same geometry. By superimposing one thus obtains prismatic layer stacks 38.
  • FIG. 10 shows a modified working unit 16, in which the maintenance of the same distance between the upper layer stack 38 and the lower side of the working head 22 does not take place by moving the working head, but by moving a support plate 102, on each of which a layer stack 40 is located .
  • the support plate 102 is guided on vertical guide rods 104, 106, which are supported by a mounting plate 108 which is mounted on the support table 10.
  • 106 To move the support plate 102 on the guide rods 104, 106 is an electric motor 110 which operates on a threaded spindle 112 which cooperates with a provided in the support plate 102 spindle nut (not shown).
  • a position transmitter 114 is again associated with the electric motor 110, so that a control provided for the electric motor can control the height of the support plate 102 as a function of the number of layers 40 already contained in the layer stack 38, similar to that for the working head with reference to FIG 20 described.
  • the working units 16 can then be mounted in a fixed vertical position on the machine frame.
  • a stationary machine section is shown at 116.
  • the adjustment possibilities according to FIG. 1 and FIG. 10 can also be provided together, in particular if adjusting mechanisms are used which each have only a small working stroke. The total adjustment then results as the sum of the adjustment of working head and support plate.
  • the green compact is obtained by stacking a larger number of thin layers 40.
  • a material layer 40 with a greater thickness is obtained by placing sections of strands of material adjacent to one another in a particular manner.
  • the material bars consist of a material which has three similar consistencies. It may also be a material which is inherently softer, but which has been brought by pre-drying and / or partial curing in a non-free flowing, at least temporarily dimensionally stable state.
  • the material layer shown in FIG. 11 has a central one
  • Section 40-1 which consists of concentric strand sections.
  • An essentially rectangular wing of the material layer 40 located on the right in FIG. 11 is obtained by juxtaposing rectilinear strand sections.
  • a section of the material layer 40 located on the left in FIG. 11 is obtained by juxtaposing short vertical strand sections. Such arrangements of strand sections can be under
  • a corresponding laying head is designated as a whole by 120. He has in its lower housing wall, a dispensing tube 122, which can deliver a thin strand of pulp-like material.
  • Control of the dispensing is accomplished by controlling the operation of a pump, not shown, which delivers the slurry material (binder and particles) from a reservoir (not shown) to the dispensing tube 122.
  • the distance between the Bottom of the delivery tube 122 and the storage area chosen small.
  • the material strand does not tear off by its own weight when the porridge pump is stopped.
  • a separating device is provided at the outlet of the delivery tube 122, which can cut off the material strand there.
  • This includes an elastic spring wire
  • pyrolyzing and sintering can also be integrated into the production machine.
  • a machine according to FIGS. 1 and 2 can be modified as follows.
  • Working units 16-1 to 16.5 are provided as follows: 16-1 Printing and applying ink layers as before, 16-2 Dry the material layers, if necessary with light
  • two of the working units of Figures 1 and 2 may be provided as exchangeable units, e.g. the working units 16-1 and 16-2. These are then replaced by pyrolysis and sintering by two working units 16-1 'and 16-2', which provide pyrolysis and sintering, respectively.
  • the throughput in the formation of the layer stack 38 is not reduced by waiting times.
  • the pyrolyzing and sintering is done on a separate conveyor to which the layer stacks 38 are transferred. It is then possible to better absorb different treatment times when printing the material layers on the one hand and better on the other hand during pyrolization or sintering, and to ensure different environmental conditions (removal of the decomposition products during pyrolysis, protective atmosphere during sintering) more easily.
  • the edge contours of the material layers differed and those in which the edge contours of the material layers were the same.
  • Suitable binders for inks are the same solvent-based binders and UV binders which are also used in printing technology for metal particles containing printing inks. Examples of suitable UV-curable binders can be found in EP 0 555 069 A.
  • hard particles are suitable as particles, including ceramic materials, metal oxides, metal carbides and metal nitrites. These are provided in powder form, it being possible, depending on the desired density in the final product, to use smaller or medium particle diameters or larger average particle diameters. In some of the printing processes mentioned, it must also be taken into account that the inks used there set upper limits for the particle diameter. This is especially true for ink jet printing and screen printing. Pad printing is more flexible in terms of particle size.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Inorganic Chemistry (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)

Abstract

L'invention concerne des ébauches crues pour la production de corps frittés produits comme suit : des couches de matériau (40) ayant des bords aux contours prédéfinis et contenant un liant et des particules d'agglomération par frittage, sont empilées pour former un empilement (38), la couche de matériau (38) respectivement en haut de l'empilement étant séchée et/ou durcie avant que la couche de matériau (40) suivante ne soit posée dessus.
PCT/EP2013/002474 2012-08-22 2013-08-17 Procédé de production de corps frittés et dispositif de production WO2014029483A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102012016562.5 2012-08-22
DE201210016562 DE102012016562A1 (de) 2012-08-22 2012-08-22 Verfahren zum Herstellen von Sinterkörpern und Vorrichtung zu seiner Durchführung

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WO2014029483A1 true WO2014029483A1 (fr) 2014-02-27

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Cited By (2)

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Publication number Priority date Publication date Assignee Title
EP3173227A1 (fr) 2015-11-27 2017-05-31 Lakeview Innovation Ltd. Composants en céramique de forme libre
EP3173202A2 (fr) 2015-11-27 2017-05-31 Lakeview Innovation Ltd. Composant en céramique spécial

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EP0555069A1 (fr) 1992-02-07 1993-08-11 Sericol Limited Compositions durcissables par radiations
EP1683629A1 (fr) * 2005-01-21 2006-07-26 "VLAAMSE INSTELLING VOOR TECHNOLOGISCH ONDERZOEK", afgekort "V.I.T.O." Substrat de mullite comprenant deux couches et son procédé de production
EP1914213A1 (fr) * 2005-08-11 2008-04-23 Denki Kagaku Kogyo Kabushiki Kaisha Substrat de nitrure de silicium, substrat de circuit de nitrure de silicium l'utilisant et son emploi

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