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WO2019125406A1 - Chauffage variable en fabrication additive - Google Patents

Chauffage variable en fabrication additive Download PDF

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Publication number
WO2019125406A1
WO2019125406A1 PCT/US2017/067240 US2017067240W WO2019125406A1 WO 2019125406 A1 WO2019125406 A1 WO 2019125406A1 US 2017067240 W US2017067240 W US 2017067240W WO 2019125406 A1 WO2019125406 A1 WO 2019125406A1
Authority
WO
WIPO (PCT)
Prior art keywords
heating
build material
build
fusing
energy
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/US2017/067240
Other languages
English (en)
Inventor
Sergi CULUBRET
Fernando Juan
Esteve COMAS
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.)
Hewlett Packard Development Co LP
Original Assignee
Hewlett Packard Development Co LP
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 Co LP filed Critical Hewlett Packard Development Co LP
Priority to PCT/US2017/067240 priority Critical patent/WO2019125406A1/fr
Publication of WO2019125406A1 publication Critical patent/WO2019125406A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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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
    • B29C64/10—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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/0288—Controlling heating or curing of polymers during moulding, e.g. by measuring temperatures or properties of the polymer and regulating the process
    • 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
    • B29C64/295—Heating elements
    • 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
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • 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
    • 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
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

Definitions

  • Some additive manufacturing systems including those commonly referred to as“3D printers”, build three-dimensional (3D) objects from addition of build material. Successive layers of build material are formed in a working area, for example on a build platform. Each layer may be selectively solidified to form a manufactured object on a layer-by-layer basis.
  • Figure 1 shows schematically an additive manufacturing system 100 according to an example.
  • Figure 2 shows schematically an additive manufacturing system 100 according to an example.
  • Figures 3A to 3C illustrate an example variation of heat energy applied to a build surface.
  • Figure 4 shows a method according to an example.
  • Figure 5 shows schematically a computer-readable medium according to an example.
  • build material is deposited on a build surface and may be selectively fused to form a manufactured part.
  • the build material may be deposited in layers, with each layer being selectively fused by application of fusing energy before the next layer is deposited. Parts can thus be manufactured layer-by-layer and thereby built from a series of cross-sections. Following manufacture, the unfused build material is removed.
  • formed layers of build material may be initially globally pre-heated by a pre-heating system in examples, the global pre-heating comprises a simultaneous heating of ail, or substantially all, of an uppermost layer of build material.
  • the applied heat may have a broad distribution that is substantially uniform over substantially ail of the top layer of the build material.
  • fusing energy is applied locally such that some form of scanning is required to apply fusing energy to all, or substantially all, of an uppermost layer of build material.
  • the pre-heating is a heating to a temperature near to, but below, a fusing temperature of the build material.
  • a fusing temperature is a temperature at which build material fuses, for example by melting and coalescing.
  • regions of build material to be fused can then be selectively heated to a temperature at or above the fusing temperature, as described in more detail below. Because the build material is pre-heated to a temperature near to the fusing temperature, a relatively small amount of extra heat is applied to such regions in the fusing operation to raise the temperature of such regions to the fusing temperature.
  • pre-heating may be applied in order to reduce the laser power for causing sintering. Such regions of build material thus fuse, whilst the surrounding regions, with a temperature below the fusing temperature, remain unfused.
  • Unevenness in the pre-heating can lead to unevenness of the fusing of different fused regions of build material. If the pre-heating is uneven and thus causes some regions to be hotter than other regions, the fusing operation can cause the hotter regions to fuse to a greater extent than the cooler regions. For example, build material to which fusing agent is applied in the hotter regions may melt, or become sintered, to a greater extent than build material to which fusing agent is applied in the cooler regions.
  • Uneven fusing of formed layers of build material can cause manufactured parts to have mechanical defects. For example, if some regions of a manufactured part fuse to a greater extent than others, the structural integrity of the part can unintentionally vary over the part, for example leading to weak spots. In addition, the speed of cooling of a given region of fused build material can depend on the local temperature achieved during the fusing and also on the consequent degree ef fusing of the given region. Uneven fusing can thus cause uneven cooling, which can lead to distortions in the geometry of a manufactured part
  • uneven pre-heating can cause visible marks on manufactured parts.
  • the degree of unevenness may be increased as the heating power applied by a pre-heating system per unit area of deposited build material increases, for example by increasing the power output of the pre-heating system or by increasing the performance of reflecting or focusing devices for controlling the flow of heat to the build material.
  • Increasing of the pre-heating performance of an additive manufacturing system can thus exacerbate the issues described above.
  • Figure 1 shows schematically an additive manufacturing system 100 according to an example. As described in more detail below, the additive manufacturing system 100 provides an increased uniformity of pre-heating of build material.
  • the additive manufacturing system 100 comprises a build supply mechanism 105 to deposit build material on a build surface.
  • the build surface is not shown in Figure 1.
  • the additive manufacturing system 100 comprises a pre-heating system 1 10 to apply globally pre-heating energy to pre-heat an upper layer of the deposited build material to a temperature below a fusing temperature of the build material.
  • the additive manufacturing system 100 comprises a fusing system 1 15 to selectively fuse deposited build material by locally heating the build material above the fusing temperature.
  • the pre-heating system 1 10 varies over time a spatial distribution of the pre-heating energy applied globally to the upper layer of deposited material.
  • the pre-heating system 1 10 may comprise at least one actuator to move at least one of the pre-heating system and a component of the pre-heating system to vary the spatial distribution of the applied pre-heating energy.
  • the actuator may move the entire pre-heating system 1 10, or may move specific components of the pre-heating system 1 10 such as one or more lamps, radiators or resistors. The motion may for example be relative to the deposited build material.
  • the incidence of static hot spots and cold spots can be reduced, and the homogeneity of the pre-heating can thereby be increased, in comparison with a system in which the spatial distribution of the applied pre-heating energy is static. In this way, the incidence of mechanical defects in printed parts and/or the incidence of visible marks on printed parts may be reduced.
  • the pre-heating energy applied by the pre heating system 1 10 comprises electromagnetic radiation at a first wavelength
  • the fusing system 1 15 is to fuse the deposited build material by applying fusing energy comprising electromagnetic radiation at a second wavelength, different from the first wavelength.
  • the first wavelength may be 1000 nanometres and the second wavelength may be 750 nanometres.
  • Use of separate fusing and pre-heating systems allows the applied radiation to have different wavelengths in this manner. The wavelengths can thus be selected for example such that the radiation applied by the fusing system 1 15 is preferentially absorbed by a fusing agent applied to regions of build material to be fused.
  • FIG. 2 shows schematically an additive manufacturing system 200 according to an example. Although the example of Figure 2 is provided to better understand the context of the examples described herein, those examples may be applied to a variety of additive manufacturing systems including, amongst others, other inkjet systems.
  • the additive manufacturing system 200 comprises a build platform 205, a build material supply mechanism 210, a pre-heating system 215 and a fusing system 220.
  • the build material supply mechanism 210 deposits a powdered build material on the build surface 205 in successive layers. Two layers are shown in Figure 2: a first layer 225-L1 upon which a second layer 225-L2 has been formed by the supply mechanism 210. In certain cases, the supply mechanism 210 is arranged to move relative to the build surface 205 such that successive layers are formed on top of each other.
  • the pre-heating system 215 may comprise a heat source constructed to emit electromagnetic radiation across a range of wavelengths to pre-heat the build material.
  • the pre-heating system 215 may comprise a radiation source such as a lamp, for example a short-wave incandescent lamp, a halogen lamp, an infra-red lamp, or an array of such lamps in certain cases, the additive manufacturing system 200 may comprise additional radiation sources to pre-heat the build material.
  • radiation sources may have other uses, e.g. may comprise lighting systems to illuminate the working area.
  • the pre-heating system 215 varies over time a spatial distribution of the applied pre-heating energy.
  • an actuator 228 moves the pre-heating system 215 in a plane parallel to the build surface 220.
  • the actuator may for example be controlled by a controller 227, based on instructions retrieved by a processor from a computer-readable storage medium.
  • the speed of motion is selected as a trade-off between higher speeds, which increase the homogeneity of the pre-heating, and lower speeds, which apply less mechanical stress to the pre-heating system 215.
  • the fusing system 220 applies fusing energy to cause fusing of build material on which a fusing agent has been applied. As described above, the fusing system 220 locally heats regions of build material to a temperature above a fusing temperature, to cause fusing of the build material.
  • the fusing system 220 may comprise a fusing lamp in one implementation a fusing lamp is carriage-mounted so as to scan across build material that is formed on the build platform 205.
  • a scanning fusing lamp may be controlled to selectively heat the build material, e.g. in areas where a fusing agent has been deposited and/or areas that have an indicated temperature below a predefined threshold.
  • the fusing system 220 comprises a printing agent deposit mechanism, for example comprising at least one print head to deposit a fusing agent and a detailing agent, wherein the fusing agent increases heating of the build material and the detailing agent reduces heating of the build material.
  • the printing agent deposit mechanism may comprise an inkjet deposit mechanism for printing a plurality of printing agents onto layers 225 of powdered build material.
  • an inkjet print head may be adapted to deposit one (or multiple) printing agents onto layers of powdered polymer build material that form the build material.
  • each print head within the inkjet deposit mechanism may be arranged to deposit a particular printing agent upon defined areas within a plurality of successive build material layers.
  • the printing agents are applied in a pattern determined based on data derived from a three- dimensional object model of an object to be manufactured.
  • the three-dimensional object model may indicate a given volume of build material as a volume to be fused. From this model may be derived data indicating the specific regions of each layer to be fused in order to form said volume.
  • a deposited layer of build material may be pre heated to a temperature near, but below, a fusing temperature of the build material in examples, a fusing agent (sometimes also referred to as a “coalescing agent”) is applied to regions of build material to be fused.
  • a fusing agent sometimes also referred to as a “coalescing agent”
  • the presence of fusing agent causes an increase in heating of the build material.
  • the fusing energy may act as an energy absorbing agent that causes build material on which it has been deposited to absorb more energy (e.g. from a fusing lamp of the fusing system 220) than build material on which no fusing agent has been deposited.
  • the fusing energy may have a wavelength that is preferentially absorbed by the fusing agent.
  • pre-heating energy may have a wavelength that is not preferentially absorbed by the fusing agent.
  • Application ef fusing energy may thus cause build material to heat up above its fusing temperature when fusing energy is applied thereto, and thereby melt, coalesce or fuse, and then solidify after cooling. In this manner, solid parts of the three-dimensional object may be constructed.
  • a detailing agent may act to modify the effect of a fusing agent and/or act directly to cool build material.
  • a detailing agent may thus be applied to reduce a heating effect of previously (or possible a posteriorly) applied fusing agent and/or to directly reduce the temperature of the build material.
  • a detailing agent may be used to form sharp object edges by inhibiting fusing of build material through thermal bleed outside of an object boundary and thus preventing solidification in exterior areas of a cross-section.
  • unfused build material may be removed to reveal the completed object.
  • Figure 2 shows a particular print head of the fusing system 220 depositing a controlled amount of a printing agent onto an addressable area 230 of the second layer 225-L2 of powdered build material.
  • a pre-heating system 1 10, 215 as described above comprises at least one actuator 227 to move at least one of the pre-heating system 1 10, 215 and a component of the pre-heating system to vary the spatial distribution of the pre-heating energy.
  • the motion is relative to the build surface 205 and relative to the fusing system 1 15, 220.
  • the motion may be motion in a plane parallel to the build surface 205.
  • Such motion can smear out the pre-heating pattern“fingerprint” that could be caused by a static pre-heating system 1 10, 215, increasing the uniformity of the pre-heating of the deposited build material.
  • such an actuator 227 is to apply a pseudo-random motion. This may increase the uniformity of the pre-heating to a greater degree than would be achieved with a regular pattern of motion, which could itself cause a non-uniform pre-heating pattern. Constraints may be applied to the pseudo random motion to increase the uniformity of the pre-heating. For example, one such constraint may be a requirement that the pre-heating system 1 10, 215 or component of the pre-heating system regularly traverses its entire range of motion
  • the pseudo-random motion described above comprises a first pseudo-random motion in a first axis parallel to the build surface 205 and a second pseudo-random motion in a second axis parallel to the build surface 205 and perpendicular to the first axis.
  • the first pseudo-random motion is independent from the second pseudo-random motion.
  • the pre-heating system 1 10, 215 moves independently in orthogonal x, axes of a plane parallel to the build surface 205.
  • the at least one actuator is to apply a motion in accordance with a pre-defined pattern.
  • the actuator may move the pre-heating system 1 10, 215 in a regularly repeating pattern in a plane parallel to the build surface 205.
  • the pre-defined pattern may be selected to increase the uniformity of the pre-heating pattern.
  • the pre-defined pattern may be such that a pre-heating element of the pre-heating system passes equally frequently over each region of build material.
  • the pre-heating system comprises an array of pre heating elements.
  • at least one actuator as described above is to vary the spatial distribution of pre-heating energy by moving the array of pre-heating elements relative to the build surface.
  • Figure 3A shows schematically a top-down plan view of a pre heating system 300.
  • the pre-heating system 300 comprises an array of pre heating elements 305, which may for example be lamps, radiators or resistors as described above.
  • the pre-beating elements are connected by joining members 310, which may form part of a frame to which the pre-heating elements are mounted.
  • Figure 3B shows schematically a top-down plan view of a pre- heating pattern“fingerprint” 315 that would arise from the use of the pre-heating system 300 statically, in the absence of any motion of the pre-heating system 300.
  • the pre-heating elements 305 are distributed over the build material, causing the pre-heating pattern 315 to be more uniform than would result from use of a single pre-heating element 305.
  • the pre-heating pattern 315 comprises hot spots 320 located directly beneath each pre-heating element 305.
  • the hot spots 320 are surrounded by cooler regions 325.
  • Figure 3C illustrates a top-down plan view of a pattern of movement of the pre-heating array 300 relative to a deposited layer of build material 330.
  • the motion will be described in terms of coordinates on x, y axes wherein, for a given axis, a value of 0 represents a minimum coordinate value and a value of 1 represents a maximum coordinate value.
  • the pre-heating array can thus have a position of between 0 and 1 in either of the x and y axes.
  • the pre heating array 300 may be moved in the x axis by a first servo or other actuator and in the y axis by a second servo or other actuator.
  • the pre-heating array 300 In a first position 335, the pre-heating array 300 has coordinates (0, 1 ). The pre-heating array 300 is then moved to a second position 340 with coordinates (1 , 1 ). The pre-heating array 300 is then moved to a third position 345 with coordinates (1 , 0), and then to a fourth position 350 with coordinates (0, 0). The pre-heating array 300 is then moved back to the first position 335 with coordinates (0, 1 ), and the pattern of motion repeats.
  • the pre-heating array 300 is moved across the build surface 330, thereby increasing the uniformity of the distribution of pre-heating energy relative to the static distribution 315 described above in relation to Figure 3B.
  • a range of movement of the array of pre- heating elements is less than or equal to a distance between neighboring pre-heating elements 305 of the array 300. This may increase the uniformity of pre-heating, because elements 305 do not move so far from regions of the build material as to cause such regions to disproportionately cool
  • the range of motion of the array of pre-heating elements is greater than or equal to half of the distance between pre-heating elements 305 of the array 300.
  • the coolest points may be at positions halfway between pre-heating elements.
  • An amplitude of motion in this range causes pre-heating elements 305 to move over these points, which may increase uniformity of heat application relative to systems with a smaller amplitude of motion.
  • the spatial distribution of pre-heating energy is varied by moving the pre-heating elements of the pre-heating system.
  • the pre-heating system may comprise a pre-heating energy distributor to distribute the pre heating energy across the deposited build material.
  • At least one actuator as described above may then move the pre-heating energy distributor to vary the spatial distribution of the pre-heating energy.
  • the pre heating energy distributor comprises a reflector and the actuator varies the spatial distribution of the pre-heating energy by moving the pre-heating energy distributor relative to the build surface.
  • the reflector may for example comprise one or more mirrors in other examples, the pre-heating energy distributor comprises a honeycomb grating and/or at least one lens. In some examples, the distributor has a lighter weight than the pre-heating elements and thus moving the distributor uses less power than moving the pre-heating elements.
  • Figure 4 shows a method 400 of additive manufacturing according to an example.
  • the method 400 comprises depositing build material onto a build surface.
  • the method 400 comprises substantially uniformly pre- heating an upper surface of the deposited build material.
  • the heat may be applied by a pre-heating system as described above.
  • pre heating the upper surface comprises simultaneously pre-heating the entirety of the upper surface.
  • the pre-heating may be uniform within a given degree: for example, the upper surface of the deposited build material may be heated such that each part thereof has a temperature within a given range.
  • the method 400 comprises selectively heating portions of the deposited build material to a temperature above the fusing temperature to cause selective fusing of the build material in accordance with a predefined pattern.
  • the pattern may for example correspond to a geometry of a part undergoing additive manufacture.
  • Substantially uniformly pre-heating the upper surface of the deposited build material comprises varying a spatial distribution of the energy applied over time.
  • varying the spatial distribution of the energy applied over time comprises moving a pre-heating system, for example as described above.
  • the pre-heating system may be moved in a predefined movement pattern. Such a pattern may be selected to increase or optimize the uniformity of pre heating of the deposited build material.
  • the moving of the pre-heating system may comprise independently moving the pre-heating system in a first axis parallel to the build surface and a second axis parallel to the build surface and perpendicular to the build surface.
  • the pre-heating system may thus, as described above, move independently in two dimensions in a plane parallel to the build surface.
  • Figure 5 shows an example of a non-transitory computer-readable storage medium 505 comprising a set of computer readable instructions which, when executed by at least one processor 510, cause the at least one processor 510 to perform a method according to examples described herein.
  • the computer readable instructions may be retrieved from a machine-readable media, e.g. any media that can contain, store, or maintain programs and data for use by or in connection with an instruction execution system in this case, machine-readable media can comprise any one of many physical media such as, for example, electronic, magnetic, optical, electromagnetic, or semiconductor media. More specific examples of suitable machine-readable media include, but are not limited to, a hard drive, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory, or a portable disc.
  • RAM random access memory
  • ROM read-only memory
  • erasable programmable read-only memory or a portable disc.
  • the processor 510 and storage medium 505 may for example be implemented within the controller 227 described above in relation to Figure 2.
  • the instructions cause the at least one processor 510 to, at block 515, deposit build material from a build material deposit system onto a build surface.
  • the instructions then cause the at least one processor 510 to, at block 520, simultaneously pre-heat the entirety of a deposited layer of build material using an array of pre-heating elements
  • the instructions cause the processor 510 to, during the pre-heating of the deposited layer of build material, move the array of pre-heating elements in accordance with a predefined movement scheme. As described in more detail above, this moving increases the uniformity of the pre-heating relative to systems in which no such moving is performed.
  • the instructions cause the processor 510 to receive an indication of a composition of the build material and select, based on the indication, the predefined movement scheme from a plurality of movement schemes. For example, the speed of motion may be selected based on the heat sensitivity of the build material such that a higher speed is used for more sensitive build materials to avoid overheating of the build material.

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

Abstract

Des exemples de la présente invention concernent un système de fabrication additive. Le système comprend un mécanisme de distribution de matériau de construction pour déposer un matériau de construction sur une surface de construction. Le système comprend un système de préchauffage pour appliquer une énergie de préchauffage globalement pour préchauffer une couche supérieure du matériau de construction déposé à une température inférieure à une température de fusion du matériau de construction. Le système comprend un système de fusion pour fusionner sélectivement un matériau de construction déposé par chauffage local du matériau de construction au-dessus de la température de fusion. Le système de préchauffage doit varier au cours du temps d'une distribution spatiale de l'énergie de préchauffage appliquée.
PCT/US2017/067240 2017-12-19 2017-12-19 Chauffage variable en fabrication additive Ceased WO2019125406A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/US2017/067240 WO2019125406A1 (fr) 2017-12-19 2017-12-19 Chauffage variable en fabrication additive

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/US2017/067240 WO2019125406A1 (fr) 2017-12-19 2017-12-19 Chauffage variable en fabrication additive

Publications (1)

Publication Number Publication Date
WO2019125406A1 true WO2019125406A1 (fr) 2019-06-27

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024108229A1 (fr) * 2022-11-19 2024-05-23 MCANANY, Yuliya Système hybride de fabrication additive thermique

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005089463A2 (fr) * 2004-03-18 2005-09-29 Desktop Factory, Inc. Dispositif d'impression tridimensionnelle au moyen de couches imagees
WO2016080993A1 (fr) * 2014-11-20 2016-05-26 Hewlett-Packard Development Company, L.P. Production d'objets tridimensionnels
US20160332379A1 (en) * 2014-01-31 2016-11-17 Eos Gmbh Electro Optical Systems Method and Device for the Improved Control of the Energy Input in a Generative Layer Construction Method
US20170021456A1 (en) * 2014-04-10 2017-01-26 Ge Avio S.R.L. Process for forming a component by means of additive manufacturing, and powder dispensing device for carrying out such a process

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005089463A2 (fr) * 2004-03-18 2005-09-29 Desktop Factory, Inc. Dispositif d'impression tridimensionnelle au moyen de couches imagees
US20160332379A1 (en) * 2014-01-31 2016-11-17 Eos Gmbh Electro Optical Systems Method and Device for the Improved Control of the Energy Input in a Generative Layer Construction Method
US20170021456A1 (en) * 2014-04-10 2017-01-26 Ge Avio S.R.L. Process for forming a component by means of additive manufacturing, and powder dispensing device for carrying out such a process
WO2016080993A1 (fr) * 2014-11-20 2016-05-26 Hewlett-Packard Development Company, L.P. Production d'objets tridimensionnels

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024108229A1 (fr) * 2022-11-19 2024-05-23 MCANANY, Yuliya Système hybride de fabrication additive thermique

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