WO2022231601A1 - Stations de désagglomération pour impression 3d - Google Patents

Stations de désagglomération pour impression 3d Download PDF

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Publication number
WO2022231601A1
WO2022231601A1 PCT/US2021/029981 US2021029981W WO2022231601A1 WO 2022231601 A1 WO2022231601 A1 WO 2022231601A1 US 2021029981 W US2021029981 W US 2021029981W WO 2022231601 A1 WO2022231601 A1 WO 2022231601A1
Authority
WO
WIPO (PCT)
Prior art keywords
separator
build bed
printing
volume
decaking
Prior art date
Application number
PCT/US2021/029981
Other languages
English (en)
Inventor
Jorge DIOSDADO BORREGO
Marc GARCIA GRAU
Original Assignee
Hewlett-Packard Development Company, L.P.
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 Hewlett-Packard Development Company, L.P. filed Critical Hewlett-Packard Development Company, L.P.
Priority to PCT/US2021/029981 priority Critical patent/WO2022231601A1/fr
Publication of WO2022231601A1 publication Critical patent/WO2022231601A1/fr

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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
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/35—Cleaning
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B5/00—Cleaning by methods involving the use of air flow or gas flow
    • B08B5/02—Cleaning by the force of jets, e.g. blowing-out cavities
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00—Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/02—Cleaning by methods not provided for in a single other subclass or a single group in this subclass by distortion, beating, or vibration of the surface to be cleaned
    • 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
    • B22F10/60—Treatment of workpieces or articles after build-up
    • B22F10/68—Cleaning or washing
    • 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
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B33Y40/20—Post-treatment, e.g. curing, coating or polishing
    • 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
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • 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
    • B22F12/30—Platforms or substrates
    • 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
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • 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
    • B29C64/171—Processes of additive manufacturing specially adapted for manufacturing multiple 3D objects
    • B29C64/176—Sequentially
    • 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
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/379—Handling of additively manufactured objects, e.g. using robots

Definitions

  • Some additive manufacturing or three-dimensional printing systems generate 3D objects by selectively solidifying portions of successively formed layers of build material on a layer-by-layer basis. After object generation the build material which has not been solidified is separated from the 3D objects.
  • Figure 1A is a schematic front-view diagram showing an example of a 3D printing decaking station
  • Figure 1 B is a schematic front-view diagram showing an example of another 3D printing decaking station
  • Figure 2 is a block diagram showing a processor-based system example to control a 3D printing decaking station
  • Figure 3 is a flowchart of an example method of controlling a 3D printing decaking station
  • Figure 4 is a flowchart of another example method of controlling a 3D printing decaking station
  • Figure 5 is a schematic front-view diagram showing an example of a 3D printing cleaning module.
  • Figure 6 is a schematic front-view diagram showing another example of a 3D printing cleaning module.
  • 3D printers generate 3D objects based on data from a 3D object model of an object or objects to be generated, for example, using a CAD computer program product.
  • 3D printers may generate 3D objects by selectively processing layers of build material.
  • a powder-based 3D printer may selectively treat portions of a layer of build material, e.g., a powder, corresponding to a layer of a 3D object to be generated, thereby leaving the portions of the layer un-treated in the areas where no 3D object is to be generated.
  • the combination of the generated 3D objects and the un-treated build material may also be referred to as a build bed.
  • Suitable powder-based build materials for use in additive manufacturing include polymer powder, metal powder or ceramic powder.
  • non-powdered build materials may be used such as gels, pastes, and slurries.
  • 3D printers may selectively treat portions of a layer of build material by, for example, ejecting a printing liquid or print agent in a pattern corresponding to cross-sectional slices of the 3D object.
  • printing liquids may include fusing agents, detailing agents, binder agents or any printing liquid suitable for the generation of a 3D object.
  • the chemical composition of some printing liquids may include, for example, a liquid vehicle and/or solvent to be at least partially evaporated once the printing liquid have been applied to the build material layer.
  • liquid vehicle and/or solvents may be referred hereinafter as solvents.
  • Other 3D printers may selectively treat portions of the layer of build material by controlling a focused energy source (e.g., a laser or an array of lasers) to emit energy to the areas of the build material layer which are intended to be solidified.
  • a focused energy source e.g., a laser or an array of lasers
  • Such printers may include selective laser sintering (SLS) printers.
  • Some three-dimensional printing systems use fusing agents to treat the portions of the layer of build material.
  • the portions in which the fusing agent is applied are further heated so that the fusing agent absorbs such energy to heat up and melt, coalesce and solidify upon cooling the portions of build material on which the fusing agent was ejected thereto.
  • the three-dimensional printing system may heat the build material by applying energy from an energy source to each layer of build material.
  • Some three-dimensional printing systems use a thermally curable binder agent which has to be heated to a predetermined temperature to cause components of the liquid binder agent to bind together particles of build material on which it is applied.
  • a liquid binder agent may comprise latex particles and curing of the binder may occur, for example, at a temperature above 40 degrees Celsius, above 70 degrees Celsius, above 100 degrees Celsius, or above 120 degrees Celsius, or above 150 degrees Celsius.
  • Such binder agents may be applied to successive layers of powdered build material, such as powdered stainless steel (e.g., SS316L) build material, and the curing of the binder agent leads to the generation of so-called “green parts.”
  • Green parts are generally relatively low-density objects formed by a matrix of cured binder and metal build material particles. Green parts are transformed into highly dense final objects by heating them in a sintering furnace to a temperature close to the melting point of the build material used.
  • the build volume comprises a set of generally relatively weakly bound green parts surrounded by generally unbound build material.
  • the unbound build material Before green parts are transferred to the sintering oven, the unbound build material has to be separated from the green parts.
  • vibration and air-blowing techniques may be used to remove unbound build material. The application of vibration and air blowing techniques cause the green parts to move and/or collide with each other and thereby potentially cause some damage on them.
  • a 3D object may be a fully fused 3D object or a green part.
  • the examples described herein provide a 3D printing decaking station to allow decaking of 3D objects which have been printed on top of each in a way that prevents or significantly avoids the objects being damaged through collision with other objects during a decaking process. Such a system thus helps increase the efficiency of 3D printer by allowing multiple objects to be vertically stacked within a build chamber.
  • FIG. 1A is a schematic front-view diagram showing an example of a 3D printing decaking station 100A.
  • a 3D printing decaking station is a post processing station within a 3D printing ecosystem in which a build bed is decaked.
  • decaking should be understood as the process of partially or totally removing the un-treated build material (e.g., build material that is non- coalesced, non-fused, unsolidified, and/or non-bound) from the generated 3D objects within the build bed.
  • the 3D printing decaking station 100A may be also referred to as 3D printing depowdering station or 3D printing cleaning station.
  • the 3D printing decaking station 100A may be a stand-alone machine. In other examples, the 3D printing decaking station 100A may be implemented in a 3D printer. In yet other examples, the 3D printing decaking station 100A may be implemented in a build material processing station. [0022]
  • the 3D printing decaking station 100A comprises an interface 110, such as an enclosure, in which the 3D printing decaking station 100A is to receive a build bed 130.
  • the interface 110 may be a totally enclosed structure with a lid or door to receive the build bed 130. In other example, the interface 110 may be a partially enclosed structure.
  • the build bed 130 may be received within the interface 110 by means of, for example, a portable build unit or a build bed transfer mechanism (not shown). As such, in some examples, the build bed 130 may not be present in the 3D printing decaking station 100A, for example during shipping or when not operating. In other examples, e.g., in use, the build bed 130 may be present in the 3D printing decaking station 100A.
  • the build bed 130 comprises two vertically separated 3D objects: a first 3D object 145A and a second 3D object 145B.
  • the term vertically separated objects may be understood as meaning objects that do not coincide in any horizontal plane.
  • the build bed 130 further comprises a substantially horizontal build bed separator 160 within the vertical separation, thereby separating the build bed 130 into two vertically independent sub-volumes, a first upper sub-volume 140A and a second lower sub-volume 140B.
  • a separator 160 should be understood as an element comprising a substantially planar profile spanning substantially the same surface as the platform from the 3D printer that generated the build bed 130.
  • the build bed 130 may further comprise a base separator (not shown) below the second lower sub volume 140B as the base of the build bed 130.
  • the build bed 130 includes the first 3D object 145A in the first upper sub volume 140A and the second 3D object 145B in the lower sub-volume 140B.
  • the build bed 130 has been generated previously by any additive manufacturing means, for example fluid deposition techniques (including the ejection of fusing agent), SLS or the like.
  • the build bed 130 may comprise additional 3D objects positioned within the first and second sub-volumes (145A, 145B). Additionally, or alternatively, the build bed 130 may comprise additional horizontal separators 160 thereby generating corresponding additional sub-volumes within which a plurality of 3D objects may have been generated.
  • the 3D printing decaking station 100A also comprises a separator conveying mechanism 120.
  • the separator conveying mechanism 120 is a mechanism suitable for moving the separator 160 and the sub-volume 140A located directly thereon, to a cleaning module 170 to thereby enable a cleaning process to be performed thereon.
  • the cleaning process involves the partial or complete separation of the un-treated build material from the generated 3D objects (e.g., first 3D object 145A).
  • Some examples of cleaning modules 170 are disclosed herein with reference to Figures 5 and 6.
  • the separator conveying mechanism 120 is further controllable to move any other separator or the base separator, if present, along with the respective sub-volume located thereon to the cleaning module 170.
  • FIG. 1 B is a schematic front-view diagram showing an example of another 3D printing decaking station 100B.
  • the 3D printing decaking station 100B may be similar to the 3D printing decaking station 100A and thus may involve some of the same elements referred to with the same reference numerals.
  • the 3D printing decaking station 100B includes the interface 110 and the separator conveying mechanism 120. The 3D printing decaking station 100B interacts with the build bed 130 and the cleaning module 170.
  • the 3D printing decaking station 100B further comprises a build bed lifting mechanism 180 to vertically raise the build bed 130 once present in the interface 110.
  • the build bed lifting mechanism may be implemented in a number of different ways, for example through a controllable pneumatic piston or any other suitable actuator.
  • the build bed lifting mechanism 180 may comprise a platform thereon (not shown) comprising a horizontal surface to hold the build bed 180.
  • the build bed lifting mechanism 180 may not comprise the platform thereon and the base separator (along with the build bed 130 thereon) may be placed directly on the build bed lifting mechanism 180.
  • the 3D printing decaking station 100B further comprises a controller 150.
  • the controller comprises a processor 155 and a memory 157 with specific control instructions stored therein to be executed by the processor 155.
  • the controller 150 is coupled to the separator conveying mechanism 120 and the build bed lifting mechanism 180.
  • the controller 150 controls at least some of the operations of the elements that it is coupled to. The functionality of the controller 150 is described further below with reference to Figures 2, 3 and 4.
  • FIG. 1 is a block diagram showing a processor-based system 200 example to control a 3D printing decaking station, for example the 3D printing decaking station 100 of Figure 1A-1 B.
  • the system 200 may be included in the controller 150 of Figure 1 B.
  • the instructions of system 200 may involve previously disclosed elements from Figures 1 A-1 B referred to with the same reference numerals.
  • the system 200 may be implemented in the 3D printing decaking station 100A of Figures 1A or the 3D printing decaking station 100B of Figures 1 B.
  • the system 200 is a processor-based system and includes a processor 210 coupled to a machine-readable medium 220.
  • the machine-readable medium comprises instructions 221-225 that, when executed by the processor 210 causes the system 100A and/or 100B to operate in accordance with the methods outlined in the flow diagrams of Figures 3 and 4.
  • Figure 3 is a flowchart of a method 300 of controlling the 3D printing decaking station 100.
  • the method 300 may involve previously disclosed elements from Figures 1A and 1 B referred to with the same reference numerals.
  • parts of method 300 may be executed by a controller, such as controller 150 from Figure 1 B.
  • the method 300 may start by receiving the build bed 130 as disclosed in the examples above in the interface 110 of the 3D printing decaking station 100. In other examples, the method 200 starts after the build bed 130 is received within the interface 110.
  • the controller 150 determines the vertical position of the separator 160 within the build bed 160. In one example, the determination may be made based on data received by the controller 150 that indicates a vertical position at which the separator was placed by a 3D printer.
  • the build unit or the build bed transfer means may include a data repository (e.g., memory, RFID, bar code, QR code, etc.) in which the data has been previously encoded. A suitable device may then read the data and send it to the controller 150.
  • the controller 150 may access the data in a wireless manner (e.g., Cloud, Local Network).
  • the determination may be made by a sensor, a vision system, or in any other suitable manner.
  • the controller 150 controls, based on the data, the build bed lifting mechanism 180 to raise the build bed 130 such that the separator 160 is in a position at which the separator conveying mechanism 120 can move it to the cleaning station 170.
  • the controller 150 controls the separator conveying mechanism 120 to move the separator 160 and the upper sub-volume 140A including the first 3D object 145A to the cleaning module 170.
  • the controller 150 directly controls the separator conveying mechanism 120, for example the controller 150 controls a pneumatic piston to actuate the separator 160 and slide it horizontally to the cleaning module 170 with the aid of a set of rails or conveying rollers.
  • the controller 150 may further control a latching mechanism or a grabbing element to latch the separator 160 within the build unit 130 to the set of rails or conveying rollers.
  • the controller 150 controls an intermediate element, such as an actuator, that in turn causes the separator conveying mechanism 120 to move the separator 160 and the upper sub-volume 140A to the cleaning module 170.
  • Figure 4 is a flowchart of an example method 400 of controlling the 3D printing decaking station 100 in which the interface 110 is to receive the build bed 130 with a plurality of build bed separators 160 separating the build bed 130 into a respective plurality of object-containing sub-volumes.
  • the build bed 130 comprises a further base separator positioned under the second lower sub-volume 140B.
  • the method 400 may involve previously disclosed elements from Figures 1 A and 1 B referred to with the same reference numerals.
  • parts of method 400 may be executed by a controller, such as controller 150 from Figure 1 B.
  • the controller 150 determines data corresponding to the vertical positions of each of the separators 160 within the build bed 130.
  • the build unit or the build bed transfer means may include a data repository (e.g., memory, RFID, bar code, QR code, etc.) in which the data has been previously encoded.
  • a suitable sensor or device may then read the data and send it to the controller.
  • the controller 150 may access to the data through a look-up table or memory repository in a wireless manner (e.g., Cloud, Local Network).
  • the controller 150 controls the build bed lifting mechanism 180 to successively position each separator 160 at a position at which the separator conveying mechanism 120 can move them, one after the other, to the cleaning module 170.
  • the controller 150 controls the separator conveying mechanism 120 to successively move each separator and the corresponding sub volume located thereon to the cleaning module 170.
  • the controller 150 determines whether an additional separator or the base separator is still present in the build unit. If so (i.e. , decision YES), the controller 150 executes block 440 again. In some example, the controller 150 may execute the subsequent block 440 after a predetermined time delay. The time delay may be based on a pre-configured time delay between the execution of block 460 and block 440 which, in some examples, has been encoded by a user. In other examples, the time delay may be based on a feedback signal indicative that the decaking operation of the sub volume corresponding to the previously moved separator to the cleaning module 170 has been completed.
  • the controller 150 determines that there are no additional separators or the base separator in the build unit (i.e., decision NO) and the controller 150 determines that the decaking of the build bed 130 has been completed and a subsequent build bed to be decaked can be introduced to the interface 110.
  • FIG. 5 is a schematic front-view diagram showing an example of a 3D printing decaking station 500 including a cleaning module 570.
  • the cleaning module 570 is an implementation of the cleaning module 170 from Figures 1A and 1 B.
  • the 3D printing decaking station 500 may involve previously disclosed elements from Figures 1 A and 1 B referred to with the same reference numerals.
  • the 3D printing decaking station 500 includes the interface 110, the separator conveying mechanism 120 and the controller 150.
  • the 3D printing decaking station 500 interacts with the build bed.
  • the cleaning module 570 includes a hopper 580 to receive non-solidified build material from a build bed 130 sub-volume when positioned over the hopper 580.
  • the hopper 580 may have any shape suitable for receiving the build material, for example, pyramidal, conical, cubical, spherical or the like.
  • the hopper 580 has an internal volume corresponding to a sub-volume of the print bed 130, for example the larger of the first and/or second sub-volumes (140A, 140B).
  • the hopper 580 has an internal volume corresponding to the volume of the entire build bed 130.
  • the controller 150 controls the separator conveying mechanism 120 is to move the separator 160 and the upper sub volume 140A including the first 3D object 145A over the hopper 580.
  • the separator 160 comprises apertures which are large enough such that the non-treated build material particles (e.g., particles of the first sub-volume 140A) may flow therethrough (see, e.g., arrow 585) towards the hopper 580 and small enough such that the 3D generated objects (e.g., first 3D object 145A) or small geometrical features from the 3D generated objects do not flow through or clog the apertures. In this manner, the non-treated build material particles are separated from the generated 3D objects.
  • the cleaning module 570 may further comprise a controllable vibrating mechanism 590 (e.g., vibration plate, eccentric motor) coupled to the controller 150 that causes the vibration mechanism to vibrate the separator 160 when located over the hopper 580.
  • the vibration causes the at least a portion of the non-treated build material to flow through the apertures into the hopper 580.
  • the non-treated build material is may be reused in generating further 3D objects.
  • a controller 150 may control the vibrating mechanism 590 to vibrate at very high frequencies (e.g., ultrasounds) for example at 20kHz, and at low amplitudes, for example of 20 microns. Vibrating at high frequencies and low amplitudes enables gentle removal of build material from 3D objects. However, the controller 150 may control the vibrating mechanism 590 to vibrate at lower frequencies, for example 35 Hz, and higher amplitudes, for example 1 mm.
  • very high frequencies e.g., ultrasounds
  • the controller 150 may control the vibrating mechanism 590 to vibrate at lower frequencies, for example 35 Hz, and higher amplitudes, for example 1 mm.
  • the controller 150 controls the vibrating mechanism 590 based on data corresponding to the sub-volume located over the hopper 580 and/or the geometry of the 3D objects within that sub-volume (e.g., first 3D object 145A within the first upper sub-volume 140A).
  • Figure 6 is a schematic front-view diagram showing an example of a 3D printing decaking station 600 including a cleaning module 670.
  • the cleaning module 670 is an implementation of the cleaning module 170 from Figures 1A and 1 B.
  • the 3D printing decaking station 600 may involve previously disclosed elements from Figures 1 A and 1 B referred to with the same reference numerals.
  • the 3D printing decaking station 600 includes the interface 110, the separator conveying mechanism 120 and the controller 150.
  • the 3D printing decaking station 600 interacts with the build bed 130.
  • the controller 150 controls the separator conveying mechanism 120 moves the separator 160 and the upper sub-volume 140A including the first 3D object 145A into the cleaning module 670.
  • the cleaning module when in use is a closed and air-tight volume.
  • the cleaning module 670 comprises a blowing device 680 located at a position above the separator 160 once in the separator 160 is in cleaning module 670.
  • the blowing device 680 is to blow a gas towards the sub-volume (e.g., upper sub-volume 140A).
  • the blowing device 680 is connectable to a gas flow source (not shown).
  • the gas flow source may be part of the 3D printing decaking station 600. In other examples, however, the gas flow source may be external from the 3D printing decaking station 600 and connectable to blowing device 680.
  • the blowing device 680 is controlled by the controller 150 and comprises a channel which is to blow a gas flow to remove non-treated build material from the sub-volume.
  • the removed build material is exhausted (e.g., arrow 685) through an exhaust port or vent (not shown).
  • the exhaust port of vent may be subject to vacuum conditions to enhance the build material removal.
  • the blowing device comprises an output port (not shown).
  • the output port may include a static blowing nozzle, a directional blowing nozzle, an airknife or a combination thereof.
  • an airknife may be implemented as a pressurized air plenum containing a series of holes (e.g., nozzles) or continuous slots through which pressurized air exits in a laminar flow.
  • the gas flow is an air flow.
  • the gas from the gas flow may be another gas, such as nitrogen.

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

Abstract

L'invention concerne une station de désagglomération pour impression 3D. La station de désagglomération pour impression 3D comprend une interface destinée à recevoir un lit de construction, le lit de construction comprenant deux objets 3D séparés verticalement et un séparateur de lit de construction séparant le lit de construction en deux sous-volumes verticalement indépendants dans lesquels un premier objet 3D est positionné dans un premier sous-volume supérieur et un second objet 3D est positionné dans un second sous-volume inférieur. La station de désagglomération pour impression 3D comprend en outre un mécanisme de transport de séparateur pour déplacer le séparateur et le sous-volume supérieur vers un module de nettoyage pour permettre à un processus de nettoyage d'être ainsi effectué.
PCT/US2021/029981 2021-04-29 2021-04-29 Stations de désagglomération pour impression 3d WO2022231601A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2021/029981 WO2022231601A1 (fr) 2021-04-29 2021-04-29 Stations de désagglomération pour impression 3d

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Application Number Priority Date Filing Date Title
PCT/US2021/029981 WO2022231601A1 (fr) 2021-04-29 2021-04-29 Stations de désagglomération pour impression 3d

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WO2022231601A1 true WO2022231601A1 (fr) 2022-11-03

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016010590A1 (fr) * 2014-07-16 2016-01-21 Hewlett-Packard Development Company, L.P. Consolidation d'un matériau de construction pour fabrication additive
WO2020222822A1 (fr) * 2019-04-30 2020-11-05 Hewlett-Packard Development Company, L.P. Système de retrait de matériau
WO2021061118A1 (fr) * 2019-09-25 2021-04-01 Hewlett-Packard Development Company, L.P. Élimination de particules de matériau de fabrication

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016010590A1 (fr) * 2014-07-16 2016-01-21 Hewlett-Packard Development Company, L.P. Consolidation d'un matériau de construction pour fabrication additive
WO2020222822A1 (fr) * 2019-04-30 2020-11-05 Hewlett-Packard Development Company, L.P. Système de retrait de matériau
WO2021061118A1 (fr) * 2019-09-25 2021-04-01 Hewlett-Packard Development Company, L.P. Élimination de particules de matériau de fabrication

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