EP4149704A1 - Procédé et appareil de fabrication additive d'une pièce à travailler - Google Patents

Procédé et appareil de fabrication additive d'une pièce à travailler

Info

Publication number
EP4149704A1
EP4149704A1 EP21736038.7A EP21736038A EP4149704A1 EP 4149704 A1 EP4149704 A1 EP 4149704A1 EP 21736038 A EP21736038 A EP 21736038A EP 4149704 A1 EP4149704 A1 EP 4149704A1
Authority
EP
European Patent Office
Prior art keywords
powder
additive manufacturing
adhesive
binder
layer
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.)
Pending
Application number
EP21736038.7A
Other languages
German (de)
English (en)
Inventor
Jan Franck
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP4149704A1 publication Critical patent/EP4149704A1/fr
Pending legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/10—Formation of a green body
    • B22F10/14—Formation of a green body by jetting of binder onto a bed of metal powder
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/10—Metallic powder containing lubricating or binding agents; Metallic powder containing organic material
    • B22F1/102—Metallic powder coated with organic material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/10—Formation of a green body
    • B22F10/16—Formation of a green body by embedding the binder within the powder bed
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/40—Radiation means
    • B22F12/41—Radiation means characterised by the type, e.g. laser or electron beam
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/165—Processes of additive manufacturing using a combination of solid and fluid materials, e.g. a powder selectively bound by a liquid binder, catalyst, inhibitor or energy absorber
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y70/00—Materials specially adapted for additive manufacturing
    • B33Y70/10—Composites of different types of material, e.g. mixtures of ceramics and polymers or mixtures of metals and biomaterials
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B29C64/264—Arrangements for irradiation
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • the invention is directed to a method and a device for building up a workpiece in layers as part of an additive manufacturing method, in particular in the form of a powder bed method, wherein grains of a powder are connected to one another using a binding agent.
  • binder jetting is primarily known as a 3D printing process, with an inkjet printer being used to print a binder onto a layer of powder or granulate.
  • This method has the disadvantage that the binding agent requires a certain hardening time, so that the production speed is limited. This limited production speed results, among other things, from the fact that the printed binding agent usually has to be thermally cured so that the printed component has a certain processing hardness, can be removed from the powder bed and cleaned and then fired in an oven and / or sintered.
  • a heat-curable adhesive is used as the binding agent, i.e. either an adhesive that can be hardened under the influence of heat or an adhesive that melts under the influence of heat and solidifies when it cools down, this heat-curable material being applied in layers rather than selectively is and is selectively activated and hardened after the application of each layer or is selectively melted and hardened on cooling, thereby connecting adjacent grains of the powder.
  • the temperature required to join the particles is much lower than the melting or sintering temperature of metals, so that energy can be saved.
  • the thermal curing can take place almost instantaneously, so that high production speeds can be achieved.
  • the adhesive used is not applied selectively as in the prior art, but applied over a large area, i.e. without exception over the entire surface of the powder bed, and it is only cured selectively, in particular only where the workpiece is later to be, in particular thermally cured .
  • the thermosetting adhesive can already be mixed with the powder, or it is impregnated or coated with the thermosetting adhesive.
  • the method according to the invention is therefore not tied to the limited quality and printing speed of print heads;
  • the adhesive can also be sprayed directly onto the powder, which is applied dry or without a binder, in the powder bed.
  • the energy input into / on the thermosetting adhesive or the hot-melt adhesive is preferably carried out by means of waves, in particular by means of electromagnetic waves, for example by means of microwaves, UV rays, light, polarized light, monochromatic light, or the like.
  • High-energy rays are generally to be preferred, for example infrared radiation.
  • a first possibility for the selective heating of the areas of the later workpiece is that the energy input into / on the thermosetting adhesive or the hot melt adhesive takes place by means of one or more masks and / or diaphragms which mask out the radiation in question in undesired areas.
  • This technique allows the use of a non-focused beam, for example heat or infrared radiation, such as is emitted by a suitable radiation source, for example an infrared lamp.
  • the masks and / or diaphragms arranged between the radiation source and the powder layer to be irradiated serve to selectively mask out a region of the uppermost powder layer that does not belong to the workpiece for each layer. In this process, an individually produced mask or screen is generally required for each layer.
  • the invention recommends using waves, in particular electromagnetic waves, in the form of directed radiation so that the energy input can be directed specifically to certain areas of the powder with the thermosetting adhesive or with the hot-melt adhesive.
  • a focused beam preferably a beam that is individually focused and / or controlled for each layer, for example an X-ray or gamma beam, can be aligned very precisely.
  • each layer can be selectively activated and cured by a laser with a controlled laser beam.
  • a laser beam is focused to the greatest possible extent and is therefore particularly suitable for the method according to the invention.
  • Gas lasers such as carbon dioxide lasers, helium-neon lasers, excimer lasers, metal vapor lasers, or liquid lasers such as dye lasers, but also solid-state lasers such as semiconductor lasers, lasers with doped glass or yttrium-aluminum-garnet lasers, Nd: YAG -Laser, titanium: sapphire laser, color center laser or laser based on titanium, chromium or neodymium.
  • rod lasers, slab lasers, fiber lasers and disk lasers are suitable.
  • the power of the laser is controlled, in particular limited, in such a way that the grains of the powder are neither melted nor partially melted or sintered.
  • the adhesive finds a structurally stable substrate and can optimally adapt to it.
  • the method according to the invention can be implemented according to a first embodiment by using a hot or hot melt adhesive, preferably a thermoplastic or a thermoplastic elastomer, as the adhesive that melts under the action of heat and solidifies when it cools down, because thermoplastic materials melt when heated above their melting temperature and can with subsequent cooling connect neighboring powder particles to one another without those particles being melted or sintered.
  • Such a hot or hot melt adhesive can be selected from the group consisting of polyamides (PA), polyethylene (PE), amorphous polyalphaolefins (APAO), ethylene-vinyl acetate copolymers (EVAC), polyester elastomers (TPE-E), polyurethane Elastomers (TPE-U), copolyamide elastomers (TPE-A) and vinylpyrrolidone / vinyl acetate copolymers and mixtures thereof.
  • PA polyamides
  • PE polyethylene
  • APAO amorphous polyalphaolefins
  • EVAC ethylene-vinyl acetate copolymers
  • TPE-E polyester elastomers
  • TPE-U polyurethane Elastomers
  • TPE-A copolyamide elastomers
  • vinylpyrrolidone / vinyl acetate copolymers and mixtures thereof and mixtures thereof.
  • a reactive hot-melt adhesive in particular a reactive one, can also be used as the heat-curable adhesive Hot melt adhesive selected from the group consisting of polyurethane (PUR), epoxy and polysiloxanes (SI) and mixtures thereof.
  • PUR polyurethane
  • SI polysiloxanes
  • reactive hot melt adhesives are able to change their chemical structure through a thermally triggered chemical reaction, in particular through (further) crosslinking of their polymer structure, with the formation of a material with an increased melting point.
  • Such hot melt adhesives are predominantly classed as thermosetting plastics.
  • the invention recommends that a powder of particles be used which are coated with the thermosetting adhesive. In such a case, the process of printing a binding agent can be saved.
  • Another approach would be to use a binder in granular form and mix that with the granules of the powder.
  • the use of grains of a powder with a coating of a heat-curable adhesive has the advantage that non-activated and therefore non-cured powder-binder components can be removed and reused when a finished workpiece is removed from the mold.
  • Another way in which the binder can be introduced into the powder in a fine distribution is that particle constituents from the binder, in particular the said heat-curable adhesive, are admixed with the powder. These particle constituents should be ground or sieved sufficiently finely, with a comparable degree of grinding or sieving as the powder itself.
  • thermosetting thermosetting resins can be dissolved in a suitable solvent or fine as an emulsion or suspension be distributed.
  • Cold thermoplastic particles can also be applied as a suspension in this way.
  • the grains can be a powder composed of an organic material or a powder composed of an inorganic material, in particular composed of metal.
  • the powder to be used can on the one hand be selected according to the requirements of the finished product, and on the other hand it can be optimally combined with the properties of the binder.
  • the invention recommends the use of a powder with particles of an inorganic material or of metal, the particles being coated with an organic binder. This procedure is generally advantageous because the melting or sintering temperature of inorganic materials such as metal, ceramic, etc.
  • the actual powder remains in the solid state of aggregation and can be intensively wetted on the surface by the adhesive when it cures, or remains as particles in the adhesive matrix.
  • An additive manufacturing device for building up a workpiece in layers, in particular using a powder bed process, where grains of powder are connected to one another using a binder is characterized by a controllable thermal energy source, with which a binder applied over the entire surface, ie non-selectively, in particular an adhesive that hardens under the action of heat or one that melts when exposed to heat and solidifies when it cools down Adhesive, activated and cured layer by layer in selected regions, whereby adjacent grains of the powder are connected in each case.
  • a manufacturing device is characterized in the context of a first embodiment by a light source for light or infrared radiation, the light beams of which are selectively controlled to selected areas of the topmost powder layer by means of a mask or diaphragm. Since unwanted areas of the powder bed are shaded by the mask or diaphragm, it is not necessary to focus the light or the infrared radiation; complex or even controllable optics are therefore not required.
  • the invention therefore recommends a device for changing the mask with the selected areas of the respective uppermost layer of the semi-finished workpiece when building up individual, multiple or all layers. If this is possible under thermal aspects, different screens or masks could be arranged, for example, on an otherwise transparent film, which is then extended by one mask or screen length with each new or geometrically different layer of the semi-finished workpiece continues to be wound.
  • a material that reflects thermal radiation could be used, for example a metallic layer, for example made of silver, or a suitable material based on a nano-thermochromic coating, for example a coating made of Nano silver.
  • Another possibility for realizing the invention is offered by lasers with a controllable laser beam, with which a heat-curable adhesive is activated and cured in layers by the laser beam, with adjacent grains of the powder being connected in each case.
  • a laser according to the invention is a preferred means of activating the heat-curable material and causing it to set in the shortest possible time.
  • the temperature required for just that activation is far lower than the melting or sintering temperature of metals, such a laser requires significantly lower energy than in the case of selective laser sintering. This is because the power of the laser can be controlled, in particular limited, in such a way that the grains of the powder are neither melted nor partially melted or sintered.
  • the laser beam can be controlled by means of optics, in particular by means of mirrors, in order to direct it to precisely those places where the workpiece to be manufactured is to be built.
  • the laser beam is controlled by a program in such a way that it selectively heats only the grains of the powder to be connected.
  • it can be pulsed so that energy is only released in one moment when the mirrors have aimed the laser beam at a point at which the workpiece is being built.
  • An additive manufacturing device preferably comprises a device for applying powder in layers.
  • the powder can be sprinkled in an approximately constant layer thickness onto a base plate or onto the semi-finished workpiece that already exists but is still unfinished and is embedded in the non-hardened powder.
  • the powder depends on the quality of the scattering mechanism used, whether this already ensures a constant layer thickness or whether a subsequent smoothing or leveling is necessary.
  • the application step can be combined with a leveling step. This is especially true if the device for layer-by-layer application of powder has a doctor blade or a roller in order to level the uppermost, last layer of powder applied, especially if the doctor blade can be pulled off flush on lateral rails or the like or the roller is mounted in a frame is. If necessary, other devices are also conceivable, as long as they are suitable for applying a new, thin layer of the powder with a thickness of, for example, one or more ⁇ m to a layer that has previously been hardened in certain areas.
  • the additive manufacturing device according to the invention can be supplemented by a heating device in order to preheat the grains of the powder, as a result of which the energy to be introduced by the laser can be further reduced.
  • an additive manufacturing device may comprise means for coating the grains of the powder with the binder, if such coated grains are not commercially available.
  • the manufacturing device according to the invention has a device for spraying a liquid or liquefied binder onto the top layer of the powder, the process step in which the particles of the powder are coated or coated with the binder, as well as the mixing of the powder with finely ground or sifted binder particles. Instead, the entire uppermost powder, which has been applied and optionally smoothed or leveled onto the base plate or the already existing but still unfinished workpiece, is sprayed with the binder or the thermally hardening adhesive. The top powder layer soaked with the binder is selectively hardened in a subsequent process step.
  • the energy input can take place with all conceivable, either partially masked or as sharply focussed and controllable rays as possible, e.g. with light rays, UV rays, gamma rays, etc.
  • the one device for spraying on a liquid or liquefied binder should have a nozzle, preferably an atomizing nozzle, which sprays the liquid or liquefied binder diffusely onto the topmost layer of the powder.
  • a nozzle preferably an atomizing nozzle, which sprays the liquid or liquefied binder diffusely onto the topmost layer of the powder.
  • the base area of the base plate for a single nozzle is relatively large, either several nozzles can be used next to one another or in a grid, or a nozzle can be used, for example, by means of a guide slide or a cross slide in a horizontal direction or in two mutually perpendicular horizontal directions above the base plate or the still unfinished semi-finished workpiece can be moved.
  • the invention is further characterized by a device for coating the grains of the powder with the binder, in particular before the powder is used in the powder bed process according to the invention. Coating drums, fluidized bed reactors and spouted bed reactors are suitable as systems for this, with a gas flowing from below through a powder and fluidizing it in the latter two.
  • the gas input can be more inhomogeneous compared to a fluidized bed reactor, so that in the center there is a jet directed upwards within the powder bed, where the gas speed is higher than the minimum fluidization speed, while in a fluidized bed reactor the gas speed is usually lower only about as large as the minimum fluidization speed, but comparatively homogeneous, which also results in fluidization.
  • the binder is then sprayed in a liquid state into the fluidized bed or spouted bed and dries or solidifies on the surface of the powder grains.
  • melt coating process or hot melt coating the binder, which is solid at room temperature, is heated above its melting point and is sprayed into the gas stream, which is also hot.
  • the temperature of the powder grains is below the melting temperature of the binding agent, so that the binding agent is deposited on the cooler powder grains and forms a coating there.
  • the method is particularly suitable for coating powder grains with a thermoplastic or a thermoplastic elastomer.
  • the binder is liquefied by a solvent which evaporates in the hot gas stream, so that the binder is deposited on the surface of the powder grains.
  • This process is also used for the coating of Powder grains with a non-hardened or still reactive, thermosetting thermosetting resin are suitable, provided that the process temperature is below the reaction temperature of the thermosetting resin at which it sets.
  • FIG. 1 shows a first step of an additive manufacturing method according to the invention for building up a workpiece in layers, an additional layer of a powder being applied to a bed;
  • FIG. 2 shows a second step of the method from FIG. 1, a binder being sprayed onto the last layer of powder applied;
  • FIG. 3 shows a third step of the same method, with certain areas of the powder layer applied and sprayed last being hardened or solidified by selective exposure to temperature.
  • the drawing shows a preferred device 1 for building up a workpiece 2 in layers from a powder 3 by additive manufacturing.
  • a horizontal frame 4 can be seen, within which a base plate 5 is arranged so as to be vertically displaceable, for example by means of a very finely adjustable lifting cylinder or a preferably electrically operated motor such as a stepper motor or a position-regulated electric motor.
  • a layer of powder 4 is applied to the production of a single layer of the workpiece 2 on the base plate 5 or on a semifinished product 6 that has already been started on this base plate 5 and is still embedded in powder 3, and so on distributed so that the youngest layer is as flat as possible. This can be done, for example, by means of a doctor blade 7, which is drawn over the previously scattered powder layer in order to level it, or by rolling a roller over the previously scattered powder layer.
  • the powder layer itself can be sprinkled or sprayed on or applied by some other technique.
  • a liquid or liquefied binder is sprayed or dusted onto the top powder layer.
  • An atomizer nozzle 8 used here should ensure that the binding agent 9 is sprayed or dusted on as uniformly as possible over the entire powder layer 3.
  • the atomizer nozzle 8 can optionally be arranged centrally above the base plate 5 or it can also be moved horizontally in order to be able to move to different positions above the base plate 5.
  • the atomizer nozzle 8 can either be arranged directly below a container 10 with the liquid or liquefied binder 9, or it can be separate from the latter and connected to the container 10 via a hose.
  • the said second step can be omitted.
  • a thermal energy source is controlled in such a way that the binder 9 or the adhesive in the uppermost, last applied powder layer is thermally selectively activated and cured, so that adjacent grains of the powder 3 are connected to one another at the location of the later workpiece 3, and within the top layer as well as with a layer that may have been applied earlier and may be located underneath.
  • a laser 11 is used as the energy source, the laser beam 12 of which can be directed via controllable optics 13 onto different, selected areas 14 in the uppermost layer of the powder 3, as the deflected laser beam 15 shows.
  • the laser can be pulsed, so that the optics 13 first control a nearly punctiform area to be hardened and the laser 11 is then briefly pulsed in order to introduce a defined amount of heat into the punctiform area in question a next, almost point-like area to be hardened controlled, etc.
  • the laser 11 can also be operated continuously with contiguous surfaces and the laser beam 12, 15 can be adjusted by means of the optics 13 at a defined speed, which is selected so that a defined amount of heat is again introduced into the top powder layer 3 per unit area.
  • the energy of the laser 11 is transferred in a sufficient amount to the selected surface area in fractions of a second and leads to the immediate hardening or melting of the binding agent 9 there, which solidifies either immediately or after a short cooling phase. Therefore - after a height adjustment of the base plate 5 carrying the workpiece semi-finished product 6 - a following powder layer 3 can be applied immediately in order to repeat all of the above processing operations in layers, until the finished workpiece 2 has emerged from the semifinished product 6 layer by layer.
  • the workpiece can then be refined, either further hardened by another thermal treatment until all the binder components contained therein have hardened, or it could be subjected to a surface treatment, for example by polishing or the like.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Health & Medical Sciences (AREA)
  • Plasma & Fusion (AREA)
  • General Health & Medical Sciences (AREA)
  • Toxicology (AREA)
  • Structural Engineering (AREA)
  • Composite Materials (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Ceramic Engineering (AREA)
  • Application Of Or Painting With Fluid Materials (AREA)

Abstract

L'invention concerne un procédé et un appareil permettant de construire une couche de pièce à travailler par couche au cours d'un procédé de fabrication additive, en particulier sous la forme d'un procédé sur lit de poudre, les grains d'une poudre étant fusionnés les uns aux autres à l'aide d'un liant, le liant utilisé étant un adhésif thermodurcissable qui n'est pas appliqué de manière sélective mais couche par couche et qui est activé et durci par une source d'énergie contrôlée, en particulier un laser avec un faisceau laser commandé, et ainsi fusionne respectivement des grains adjacents de la poudre.
EP21736038.7A 2020-05-14 2021-05-12 Procédé et appareil de fabrication additive d'une pièce à travailler Pending EP4149704A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102020002891 2020-05-14
PCT/IB2021/054034 WO2021229457A1 (fr) 2020-05-14 2021-05-12 Procédé et appareil de fabrication additive d'une pièce à travailler

Publications (1)

Publication Number Publication Date
EP4149704A1 true EP4149704A1 (fr) 2023-03-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP21736038.7A Pending EP4149704A1 (fr) 2020-05-14 2021-05-12 Procédé et appareil de fabrication additive d'une pièce à travailler

Country Status (5)

Country Link
US (1) US20230226608A1 (fr)
EP (1) EP4149704A1 (fr)
CN (1) CN115768575A (fr)
CA (1) CA3183449A1 (fr)
WO (1) WO2021229457A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20240208138A1 (en) * 2022-12-23 2024-06-27 Sakuu Corporation Solvent free battery printing system and process
CN116728773A (zh) * 2023-05-16 2023-09-12 浙江正向增材制造有限公司 三维成形装置、三维成形设备和三维成形方法

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5749041A (en) * 1995-10-13 1998-05-05 Dtm Corporation Method of forming three-dimensional articles using thermosetting materials
US6401002B1 (en) * 1999-04-29 2002-06-04 Nanotek Instruments, Inc. Layer manufacturing apparatus and process
US11554418B2 (en) * 2017-03-17 2023-01-17 Desktop Metal, Inc. Base plate in additive manufacturing
DE102017207210A1 (de) * 2017-04-28 2018-10-31 Skz-Kfe Ggmbh Verfahren zur additiven Herstellung eines Bauteils sowie additiv hergestelltes Bauteil
CN109759579A (zh) * 2019-02-19 2019-05-17 南通理工学院 一种金属基复合材料粉末的三维印刷快速成型方法
CN110066187A (zh) * 2019-05-15 2019-07-30 浙江华科三维科技有限公司 一种复杂形状多孔氮化硅陶瓷的增材制造方法
EP3972813B1 (fr) * 2019-05-23 2026-02-25 General Electric Company Appareil de fabrication additive

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Publication number Publication date
WO2021229457A1 (fr) 2021-11-18
US20230226608A1 (en) 2023-07-20
CA3183449A1 (fr) 2021-11-18
CN115768575A (zh) 2023-03-07

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