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WO2018118697A1 - Dispositif de réenduction sans panache pour impression en trois dimensions - Google Patents

Dispositif de réenduction sans panache pour impression en trois dimensions Download PDF

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Publication number
WO2018118697A1
WO2018118697A1 PCT/US2017/066743 US2017066743W WO2018118697A1 WO 2018118697 A1 WO2018118697 A1 WO 2018118697A1 US 2017066743 W US2017066743 W US 2017066743W WO 2018118697 A1 WO2018118697 A1 WO 2018118697A1
Authority
WO
WIPO (PCT)
Prior art keywords
powder
recoater
ramp
confinement chamber
receiving surface
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.)
Ceased
Application number
PCT/US2017/066743
Other languages
English (en)
Inventor
Thomas Lizzi
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.)
ExOne Co
Original Assignee
ExOne Co
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 ExOne Co filed Critical ExOne Co
Publication of WO2018118697A1 publication Critical patent/WO2018118697A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • 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
    • B29C64/205—Means for applying layers
    • B29C64/214—Doctor blades
    • 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
    • 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
    • B29C64/141—Processes of additive manufacturing using only solid materials
    • 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
    • B29C64/141—Processes of additive manufacturing using only solid materials
    • B29C64/153—Processes of additive manufacturing using only solid materials using layers of powder being selectively joined, e.g. by selective laser sintering or melting
    • 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
    • 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
    • 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
    • B29C64/227—Driving means
    • 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
    • B29C64/245—Platforms or substrates
    • 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
    • B29C64/25—Housings, e.g. machine housings
    • 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
    • B29C64/255—Enclosures for the building material, e.g. powder containers
    • 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
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D 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 [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor

Definitions

  • the present invention relates to powder recoaters adapted for use in three- dimensional printing and three-dimensional printers having such recoaters.
  • powder is also sometimes referred to in the art as “particulate material” or “particles” and the term “powder” is to be construed herein as meaning any such material, by whatever name, that is used in such three-dimensional printers as a layer-forming material.
  • Powder may comprise any type of material capable of taking on the powder form, e.g. metal, plastics, ceramics, carbon, graphite, composite materials, minerals, etc., and combinations thereof.
  • build powder is used herein to refer to a powder which is used to form the powder layers and from which the article is built in a powder-layer three-dimensional printer.
  • a first layer of a build powder is deposited upon a vertically indexible build platform and then successive powder layers are deposited one at a time upon the first powder layer. Selected portions of selected powder layers are treated to bind the powders in those portions together as one or more three-dimensional articles are formed. Collectively, the portions of the deposited powder layers which are not bound together are referred to herein as a "powder bed.” [0005] The process of forming a powder layer is sometimes referred to in the art, and is referred to herein, as "recoating”.
  • each powder layer is formed by transferring a predetermined quantity of build powder from an open-top stationary powder reservoir by first indexing upward a platform which supports the powder within the reservoir a predetermined amount to raise the predetermined quantity above the reservoir walls and then pushing that quantity of powder across the top of the build platform or the powder bed, e.g. by a doctor blade or a counter-rotating roller, to form a powder layer.
  • recoaters are described in U.S. Patent 5,387,380 to Cima et al. Such recoaters are generally limited for use with relatively small size powder beds, i.e. those which having recoating direction lengths of under a few tens of centimeters.
  • each powder layer is deposited upon the build platform or upon an extant powder bed by a recoater comprising a traveling powder dispenser which dispenses a build powder through an open slit as it traverses across the build platform or powder bed.
  • a recoater comprising a traveling powder dispenser which dispenses a build powder through an open slit as it traverses across the build platform or powder bed. Examples of such recoaters are described in U.S. Patent 7,799,253 B2 to Hochsmann et al. Such recoaters may or may not include some device which is adapted to smoothen the top of the powder layer.
  • the term “smoothen” is to be interpreted as meaning operating on a quantity of powder so as to do at least one of (a) form at least a portion of the quantity of powder into a layer, (b) make at least a portion of the surface of a layer comprising the quantity of powder less rough, and (c) compress at least a portion of a layer comprising the quantity of powder.
  • a mechanism which smoothens a quantity of powder is referred to herein as a "smoothing device.”
  • Some powder-layer three-dimensional printers benefit from generally applying radiant energy to the powder bed, e.g. to adjust the temperature the powder bed, to assist in the volatilization of fugitive materials, e.g. the carrier or solvent portion of applied binder systems, from the powder bed, and/or to aid in curing one or more materials present within the powder bed. Accordingly, some makers of such powder-layer three-dimensional printers have found it expedient to mount the radiant energy source on the recoater. Doing so provides the radiant energy source with a controllable carriage for moving the radiant heat source across the powder bed, thus eliminating any need for a separate carriage system.
  • the radiant energy source can be operated at the same, overlapping, or different times from the operation of the recoater' s powder dispensing mechanisms.
  • Fine powders are those build powders which are prone to flow problems and/or to agglomeration problems due to the fact that for them surface-related forces are no longer negligible in relation to gravitational forces.
  • fine powders have an average effective diameter of under 20 microns, although for some powder materials having high levels of surface-related forces, the average effective diameter at which they fall within this definition of fine powders is larger than 20 microns.
  • the surface-related forces do not only include forces by which one particle is inherently attracted to another, but also include the forces arising from materials which at least partially coat a particle's surface, e.g. adsorbed moisture.
  • the present invention provides powder-layer three-dimensional printer recoaters which are adapted for use with fine powders in a manner that substantially decreases or eliminates the plumes that are due to the deposition of the fine build powder onto the build bed.
  • the recoater avoids the dropping of the powder as even a drop of a few millimeters is enough to cause fine powder to plume due to air being entrained or trapped by the falling powder and then escaping in small currents that carry along with them entrained fine powder.
  • an amount of powder that is sufficient to cover the powder bed one layer deep is first dosed within a closed container onto a ramp (which is the width of the powder bed) that is in the closed position within the closed container to form a dosed powder pile that is the width of the powder bed.
  • the ramp is lowered so that its bottom edge is in contact with a preselected location on the surface of the powder bed.
  • a pusher then pushes the powder onto the powder bed to form a deposited powder pile.
  • the recoater is moved a preselected distance across the powder bed surface as the powder is being deposited onto the bed surface so that the width of the deposited powder pile is substantially the same as was the width of the dosed powder pile.
  • the pusher is then withdrawn and the ramp raised back to its closed position.
  • the ramp is segmented along its length so as to have an end section that is articulatable.
  • the ramp is raised and the recoater is repositioned.
  • the end section is rotated downward to form a scraper that engages an edge of the deposited powder pile.
  • the recoater is then moved so that the end section spreads the powder across the powder bed to form a layer.
  • this layer is then further smoothened and/or compacted using a conventional counter-rotating roller or a tamping foot that is moved across the powder bed.
  • the present invention also includes powder-layer three-dimensional printers of which such inventive recoaters are a component.
  • the present invention also includes using such inventive recoaters and such inventive powder-layer three-dimensional printers for making articles.
  • FIG. 1A-1F are schematic cross-sectional side views of an embodiment of an inventive recoater above a build bed.
  • FIG. 1A depicts the recoater situated above a powder bed in position for applying a new powder layer to the build bed.
  • FIG. IB depicts the recoater of FIG. 1A after powder has been dosed from the powder reservoir onto the ramp to form a dosed powder pile within the closed confinement chamber.
  • FIG. 1C depicts the recoater of FIG. IB. after the ramp has been lowered and the dosed powder pile has been pushed down the ramp onto the surface of the build bed to form a deposited powder pile.
  • FIG. ID depicts the recoater of FIG. 1C after the ramp has been raised back up to close the confinement chamber.
  • FIG. IE depicts the recoater of FIG. ID after the recoater has been moved to the right and the end section of the ramp has been lowered to engage the right-hand edge of the deposited powder pile.
  • FIG. IF depicts the recoater of FIG. IE after the recoater has been moved to the left so that the end section of the ramp has spread the deposited powder pile into a new layer.
  • FIG. 2 shows a closer schematic view of the bottom portion of the recoater of FIG. 1A.
  • FIGS. 3A and 3B are schematic cross-sectional side views of embodiments similar to those shown in FIGS. IB and 1C, respectively, which include filtered optional exhaust and inlet vents.
  • FIGS. 1 A- IF are schematic cross-sectional side views of an embodiment of an inventive recoater above a build bed.
  • the recoater 10 is positioned above a build bed 12.
  • the width of the recoater 10 is in the plane that is perpendicular to the drawing page and is as wide as the build bed 12.
  • the recoater 10 is mounted on a controllable trolley (not depicted) that permits the recoater 10 to be moved across the entire length of the build bed 12.
  • FIG. 2 shows a closer view of the recoater 10.
  • the recoater 10 includes a powder reservoir 14 that is full of a build powder 16.
  • a confinement chamber 18 is situated below the powder reservoir 14.
  • a selectively positionable ramp 20 defines and closes off the bottom of the confinement chamber 18.
  • a vibrator 24 is operably connected to the side of the powder reservoir 14. The vibrator 24 and the valve 22 are operated in conjunction with one another to dose a predetermined amount of the build powder 16 from the powder reservoir 14 onto the ramp 20.
  • the ramp 20 is rotatably connected to the wall of the confinement chamber 18 by a first hinge 26.
  • the ramp 20 is adapted to be raised to seal off the bottom of the confinement chamber 18 or lowered to engage a build bed by way of a selectively controllable raising mechanism (not depicted) such as a hydraulic cylinder or electric motor.
  • the ramp 20 includes a fore section 28 and an end section 30 which are rotatably interconnected by a second hinge 32.
  • a selectively controllable hydraulic cylinder 34 is hingedly connected to the end section 30 to allow the end section to be selectively raised and lowered.
  • the recoater also comprises a pusher 36 comprising a pusher blade 38 connected to a telescoping arm 40 of a hydraulic cylinder 42.
  • the recoater 10 in some embodiments is equipped with one or more sensors (not shown) to detect the amount of powder that has been dispensed onto the ramp 20. For examples, such sensors may detect the weight and/or the volume of the powder that has been dispensed.
  • the ramp 20 is lowered to engage or nearly engage the surface 46 of the build bed 12 and the pusher is operated to push the dosed powder pile 44 (refer to FIG. IB) onto the surface 46 to form a deposited powder pile 48.
  • the dosed powder pile 44 (refer to FIG. IB) onto the surface 46 to form a deposited powder pile 48.
  • No pluming occurs during this operation as no air is either entrained or entrapped within the dosed powder pile 44 as it is moved onto the surface 46 to form the deposited powder pile 48.
  • FIG. ID depicts the recoater 10 after the ramp 20 has been raised back up to close the confinement chamber 18.
  • FIG. IE depicts the recoater 10 after the recoater 10 has been moved to the right and the end section 30 of the ramp 20 has been lowered to engage the right-hand edge of the deposited powder pile 48.
  • FIG. IF depicts the recoater 10 after the recoater 10 has been moved to the left across the build bed 12 so that the end section 30 of the ramp 20 has spread the deposited powder pile 48 to form a new layer 50.
  • This new layer 50 can then be acted upon by the printing mechanism (not depicted) of the three-dimensional printer or it can be further conditioned by a smoothing device.
  • the end section 30 can be raised back into place to seal off the containment chamber 18 and the recoater moved out of the way of the printing mechanism (not depicted).
  • Some embodiments include one or more optional exhaust vents for the confinement chamber which are in operable communication with a low pressure source. Such vents make it possible to clear the interior space of the closed confinement chamber of any powder particles which may have become suspended during the dosing of the powder onto the ramp in a much shorter time than may be possible by settling.
  • the filters may be added to the exhaust vents to collect the powder.
  • one or more filtered inlets are used in conjunction with the one or more exhaust vents to control the flow of air (or other selected gas) through the confinement chamber.
  • Some embodiments which include one or more optional exhaust vents also include side covers attached to the sides of the ramp which drop down when the ramp is lowered so as to prevent powder from spilling off of the edges of the ramp while it is being pushed and also to prevent air (or other selected gas) from coming in from the sides while the ramp is lowered and the exhaust vent is in an exhausting mode.
  • FIGS. 3A and 3B are schematic cross-sectional side views of embodiments similar to those shown in FIGS. IB and 1C, respectively, which include filtered optional exhaust and inlet vents.
  • a recoater 60 is shown just after powder has been dosed to form dosed powder pile 62.
  • a filtered exhaust vent 64 is connected to a low pressure source (not depicted) and is in fluid communication with the interior of the confinement chamber 66.
  • a filtered inlet vent 68 is in fluid communication with the interior of the confinement chamber 66 to permit a controlled amount of air (or other selected gas) to enter into the closed confinement chamber 66.
  • the arrows e.g. the arrow 72, indicate the gas flow that enters the confinement chamber when the ramp 74 is in the lowered position. Such gas flow sweeps across the dosed powder to the exhaust vent 64 as the powder powder pile 62 is being pushed down the ramp 74 and onto the powder bed surface 76 so as to collect any small amount of pluming that may arise during the pushing process.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • Toxicology (AREA)

Abstract

L'invention concerne un dispositif de réenduction pour une imprimante tridimensionnelle à couche de poudre. Le dispositif de réenduction comprend un réservoir de poudre, une chambre de confinement présentant une rampe pouvant être commandée, pourvue d'une extrémité distale, et un poussoir, le réservoir de poudre étant conçu pour doser une quantité prédéterminée de poudre sur la rampe lorsque la chambre de confinement est fermée de manière à contenir un quelconque panache qui pourrait se produire pendant le dosage de la poudre. La rampe est conçue pour être mise en rotation de telle sorte que son extrémité distale entre en contact ou quasiment en contact avec une surface d'un lit de construction et le poussoir est conçu pour pousser la poudre dosée le long de la rampe et hors de l'extrémité distale de la rampe sur la surface du lit de construction sans provoquer de panache.
PCT/US2017/066743 2016-12-23 2017-12-15 Dispositif de réenduction sans panache pour impression en trois dimensions Ceased WO2018118697A1 (fr)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US201662438892P 2016-12-23 2016-12-23
US62/438,892 2016-12-23
US201762441757P 2017-01-03 2017-01-03
US62/441,757 2017-01-03

Publications (1)

Publication Number Publication Date
WO2018118697A1 true WO2018118697A1 (fr) 2018-06-28

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3639951A1 (fr) * 2018-10-17 2020-04-22 Siemens Aktiengesellschaft Tête de dispositif de ré-enduction pour le dépôt localisé d'un matériau de base en poudre dans la fabrication additive
CN112406102A (zh) * 2021-01-06 2021-02-26 费会将 一种多喷头协同的3d打印机

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014044676A1 (fr) * 2012-09-18 2014-03-27 Blueprinter Aps Mécanisme d'alimentation en poudre pour imprimante tridimensionnelle
WO2016176432A1 (fr) * 2015-04-30 2016-11-03 The Exone Company Recoucheuse de poudre pour imprimante en trois dimensions
US9486962B1 (en) * 2016-05-23 2016-11-08 The Exone Company Fine powder recoater for three-dimensional printer

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2014044676A1 (fr) * 2012-09-18 2014-03-27 Blueprinter Aps Mécanisme d'alimentation en poudre pour imprimante tridimensionnelle
WO2016176432A1 (fr) * 2015-04-30 2016-11-03 The Exone Company Recoucheuse de poudre pour imprimante en trois dimensions
US9486962B1 (en) * 2016-05-23 2016-11-08 The Exone Company Fine powder recoater for three-dimensional printer

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3639951A1 (fr) * 2018-10-17 2020-04-22 Siemens Aktiengesellschaft Tête de dispositif de ré-enduction pour le dépôt localisé d'un matériau de base en poudre dans la fabrication additive
CN112406102A (zh) * 2021-01-06 2021-02-26 费会将 一种多喷头协同的3d打印机

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