• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    An additive manufacturing device (10), comprising: a tray (12) defining a planar work surface (34) having an opening (36), the opening (36) communicating with a construction enclosure (24) containing a platform construction form (26) with vertical sliding; and a first carriage (20) having a first powder transfer window (46), the first carriage (20) being movable over the entire work surface (34) between a loading position remote from the opening ( 36) where the first powder transfer window (46) is accessible to receive powder and a feed position in which the first powder transfer window (46) is aligned above the aperture (36) .
    公开号:FR3035606A1
    申请号:FR1653656
    申请日:2016-04-26
    公开日:2016-11-04
    发明作者:David Richard Barnhart
    申请人:General Electric Co；
    IPC主号:
    专利说明:

    [0001] This invention relates generally to additive manufacturing and, more particularly, to manipulation mechanisms for additive manufacturing. "Additive manufacturing" is an expression here used to refer to a process that involves layer-by-layer construction or batch-making (as opposed to material removal in conventional machining). These methods may be referred to as "rapid manufacturing processes". The additive manufacturing processes include, but are not limited to: direct metal laser melting (DMLM), laser finished shaping (LNSM), electron beam sintering, laser selective sintering (SLS), 3D printing including ink jets and laser projections, stereolithography (SLA), electron beam melting (EBM), laser finished design (LENS) and direct metal deposition (DMD) .
    [0002] Currently, it is the powder bed techniques that have demonstrated the best resolution possibilities among the prior techniques of metal additive manufacturing. However, since the construction must take place in the powder bed, the conventional machines use a large amount of powder, the powder load can for example exceed 130 kg (300 lbs), which is expensive if we consider the context of a factory using many machines. Powder that is not directly integrated by melting in the room but accumulated in the neighboring powder bed is problematic since it weighs the elevator systems, it complicates the tightness and pressure problems in the rooms, it damages the Extraction of parts at the end of the construction of parts and it becomes unmanageable in the systems with large beds considered today for large parts. In addition, existing additive manufacturing systems are equipped for prototyping and manufacturing in very small batches. There may be considerable differences from one room to another. Some elements of current systems are awkward to handle because of their weight and may require too much direct manual contact.
    [0003] In this way, there is still a need for an additive manufacturing device and method for manufacturing mass-produced parts of consistent quality. This deficiency is filled by the present invention which provides a powder transfer system having one or more laterally movable carriages for transferring a fixed amount of powder from a powder supply system to a building enclosure. According to a first aspect of the invention, an additive manufacturing device comprises: a plate defining a flat working surface 20 having an opening, the opening communicating with a construction enclosure containing a vertical sliding construction platform; and a first carriage having a first powder transfer window, the first carriage being movable over the entire work surface between a loading position remote from the opening where the first powder transfer window is accessible to receive powder and a feed position in which the first powder transfer window is aligned above the aperture. According to another aspect of the invention, the device further comprises a second carriage having a second powder transfer window, the second carriage being placed over the first carriage and being movable between a remote loading position of the opening where the second powder transfer window is accessible to receive powder and a feed position in which the second powder transfer window is aligned above the aperture. According to another aspect of the invention, the device further comprises a compactor having a compacting piston able to exit selectively through the first powder transfer window in order to compact the powder contained in the construction chamber. According to another aspect of the invention, the device further comprises a directed energy source designed to melt and consolidate the accessible powder on the construction platform. According to another aspect of the invention, the device further comprises a powder handling system having a powder supply member adapted to supply powder to the first powder transfer window in the loading position, and a powder recovery member adapted to receive unused powder scraped on the construction platform by the first carriage. According to another aspect of the invention, the device further comprises: a second carriage disposed over the first carriage and movable between a loading position remote from the opening where the second powder transfer window is accessible to receive powder, and a feed position in which the second powder transfer window is aligned above the aperture; a compacting platform located over the second carriage and having a compaction opening aligned with the opening of the work surface, and a powder feed opening spaced laterally from the compaction opening; a compactor disposed on the compaction platform, the compactor comprising a compaction piston selectively able to exit through the first powder transfer window to compact the powder contained in the construction enclosure; a powder handling system 5 having a powder supply member disposed on the compacting platform in flow communication with the powder supply opening, a powder recovering member disposed under a recovery opening powder of the tray which is aligned with the powder supply opening of the compaction platform; and a directed energy source designed to melt and consolidate the accessible powder on the construction platform. According to another aspect of the invention, the compactor is movable laterally between a rest position remote from the opening and a working position aligned with the opening. According to another aspect of the invention, the powder recovery member comprises a valve located under the powder recovery aperture and movable between a closed position which prevents powder flow and an open position which allows the flow of powder. According to another aspect of the invention, in the loading position, the first and second powder transfer windows are aligned under the powder supply member and, in the feeding position, the first and second windows of powder transfer are aligned above the aperture. According to another aspect of the invention, a part manufacturing method comprises the steps of: using a device having: a platen defining a planar work surface and having an aperture; and a first movable carriage 30 including a first powder transfer window; loading powder into the first powder transfer window at a loading position remote from the opening, and passing the first carriage on the tray from a loading position to a feed position in which the first powder transfer window is aligned with the window; supplying powder from the first powder transfer window to a construction platform accessible through the opening; returning the first carriage to the loading position to scrape the powder present on the construction platform to form a powder layer increment; Directing a beam from a directed energy source to melt the powder layer increment in a pattern corresponding to a cross-sectional layer of the workpiece; lowering the construction platform to a degree equal to the layer increment; and cyclic repetition of the loading, supplying, returning, melting and lowering steps to realize the workpiece by layer-by-layer accumulation. According to another aspect of the invention, the method further comprises the step of compacting the powder after it has been supplied to the construction platform.
    [0004] According to another aspect of the invention, the method further comprises the steps of: using a powder supply member of a powder handling system to load powder into the first powder transfer window while the first carriage is in the loading position; and using a powder recovery member of the powder handling system to receive the scraped powder from the first carriage. According to another aspect of the invention, the method further comprises closing a valve placed under the powder supply member to prevent powder from exiting the first carriage during powder loading into the first powder transfer window.
    [0005] According to another aspect of the invention, the method further comprises opening the valve to allow powder to exit the first carriage and enter the powder recovery member after scraping the powder.
    [0006] According to another aspect of the invention, the device further comprises a second carriage having a second powder transfer window and the method further comprises the steps of: loading powder into the second powder transfer window at the same time that loading powder into the first powder transfer window, passing the second carriage together with the first carriage across the tray, from the loading position to the feed position; supplying powder, from the second powder transfer window, to the construction platform at the same time as supplying powder from the first powder transfer window; compacting the powder supplied to the construction platform; and returning the second carriage to the loading position to scrape the remaining powder on the first carriage after the first carriage has scraped off the powder on the construction platform. According to another aspect of the invention, the method further comprises the steps of: using a powder supply member of a powder transfer system to load powder into the first and second transfer windows of powder; and using a powder recovery member of a powder transfer system to receive scraped powder from the first and second carriages. According to another aspect of the invention, the method further comprises compacting the powder after it has been supplied to the construction platform.
    [0007] According to another aspect of the invention, the compacting step comprises: the lateral displacement of the compactor from a rest position remote from the opening to an aligned working position above the first and second transfer windows powder and opening; outputting a compaction piston from the compactor into the second powder transfer window for compacting the supplied powder; maintaining the compacting piston in the second powder transfer window while the first carriage scrapes the powder to form the powder layer increment; removing the compacting piston from the second powder transfer window once the first carriage has formed the powder layer increment; and the passage of the compactor from the working position to the rest position before returning the second carriage to the loading position.
    [0008] According to a particular embodiment of the invention, the device further comprises a second carriage having a second powder transfer window, the method further comprising the powder loading steps in the second powder transfer window. at the same time as loading powder 20 into the first powder transfer window; passing the second carriage, together with the first carriage across the tray, from the loading position to the feed position; supplying powder, from the second powder transfer window, to the construction platform at the same time as supplying powder from the first powder transfer window; compacting the powder supplied to the opening above the construction platform; and returning the second carriage to the loading position to scrape the powder remaining on the first carriage after the first carriage has scraped the powder into the opening above the construction platform.
    [0009] Advantageously, the method further comprises compaction of the powder after it has been supplied to the construction platform, using the steps of lateral displacement of the compactor from a rest position at a distance from the opening to a working position aligned above the first and second powder transfer windows and the aperture; outputting a compactor compaction piston into the second powder transfer window for compacting the supplied powder; holding the compacting piston in the second powder transfer window while the first carriage scrapes the powder to form the powder layer increment in the opening above the construction platform; withdrawing the compacting piston from the second powder transfer window once the first carriage has formed the powder layer increment; and moving the compactor from the working position to the rest position before returning the second carriage to the loading position. According to another aspect of the invention, an additive manufacturing device comprises: a tray defining a planar working surface having an opening, the opening communicating with a construction enclosure containing a vertical sliding construction platform; and a first carriage has a first powder transfer window, the first carriage being movable over the entire working surface between a loading position remote from the opening, wherein the first powder transfer window is accessible for receiving powder, and a feed position in which the first powder transfer window is aligned above the aperture. According to another aspect of the invention, the device further comprises a second carriage having a second powder transfer window, the second carriage being disposed over the first carriage and being movable between a remote loading position of the opening, wherein the second powder transfer window is accessible to receive powder, and a feed position in which the second powder transfer window is aligned above the aperture. According to another aspect of the invention, the device further comprises compacting means for compacting the powder contained in the construction chamber. According to another aspect of the invention, the compacting means comprises a compactor having a compaction piston which can selectively exit through the first powder transfer window so as to compact the powder contained in the construction chamber. According to another aspect of the invention, the device further comprises a directed energy source adapted to melt the accessible powder on the construction platform. In another aspect of the invention, the device further includes powder handling means for supplying powder to the first powder transfer window to recover unused powder. In another aspect of the invention, the powder handling means comprises a powder handling system having a powder supply member configured to supply powder to the first powder transfer window in the loading position. and a powder recovery member adapted to receive the unused powder. According to another aspect of the invention, the device further comprises: a second carriage disposed over the first carriage and movable between a loading position remote from the opening, wherein the second powder transfer window is accessible for receiving powder, and a feeding position 3035606 in which the second powder transfer window is aligned above the aperture; a compacting platform located above the second carriage and having a compaction opening aligned over the opening of the working surface, and a powder supply opening laterally spaced from the opening compaction; a compactor disposed on the compaction platform, the compactor comprising a compacting piston selectively able to exit through the first powder transfer window so as to compact the powder contained in the construction chamber; a powder handling system having a powder supply member placed on the compaction platform in flow communication with the powder supply opening, a powder recovery member placed under a recovery opening powder of the tray that is aligned with the powder supply opening of the compaction platform; and a directed energy source adapted to melt the accessible powder on the construction platform. According to another aspect of the invention, the compactor is movable laterally between a rest position remote from the opening and a work aligned with the opening. According to another aspect of the invention, the powder recovery member comprises a valve placed under the powder recovery opening and movable between a closed position 25 which prevents the flow of powder and an open position which allows the flow of powder. According to another aspect of the invention, in the loading position, the first and second powder transfer windows are aligned under the powder supply member and, in the feed position, the first and second windows powder transfer are aligned above the opening.
    [0010] The invention will be better understood from the detailed study of some embodiments taken by way of nonlimiting examples and illustrated by the appended drawings, in which: FIG. 1 is a schematic view of a manufacturing device; additive constructed according to one aspect of the invention, in the loading position; - Figure 2 is a schematic view of an additive manufacturing device of Figure 1, in the feed position; Figure 3 is a schematic view of the additive manufacturing device of Figure 2 showing the powder during compaction; Figures 4 and 5 are schematic views of the additive manufacturing device of Figure 3 showing the compacted powder during scraping thereof; and Figure 6 is a schematic view of the additive manufacturing device of Figure 5 showing the scraped powder during melting thereof by a directed energy source. Referring to the drawings in which like reference numerals designate the same elements throughout the various views, Fig. 1 shows an additive manufacturing device 10 for carrying out the manufacturing method according to the present invention. The main members are a plate 12, a closed circuit powder handling system 14 having a powder supply member 16 and a powder recovery member 18, a first and a second carriages 20 and 22, an enclosure of Construction 24 surrounding a construction platform 26, a directed energy source 28, a beam steering device 30 and a compactor 32. Each of these bodies will now be described in more detail.
    [0011] The tray 12 is a rigid structure having a flat work surface 34. The work surface 34 is in the same plane as a virtual work plane that it defines. In the illustrated example, it comprises an opening 36 communicating with the construction chamber 24 and making accessible the construction platform 26, and a powder recovery opening 38 5 communicating with the building enclosure 24 and making it accessible. the construction platform 26 and a powder recovery opening 38 communicating with the powder recovery member 18 of the powder handling system 14. Optionally, a hatch 40 or an actuating valve is disposed in the opening powder recovery valve 38 for opening and closing the powder recovery opening 38. The valve 40 can be actuated by pneumatic or hydraulic cylinders, electric ball screw or linear actuators, etc.
    [0012] The first and second carriages 20 and 22 are rigid plate-shaped structures actuated independently of one another by jacks 42 and 44 respectively for selectively moving the first and second carriages 20 and 22 between a loading position. , FIG. 1, and a feed position, FIG. 2. As illustrated, the first carriage 20 is on the work surface 34 and includes a first powder transfer window 46 and the second carriage 22 is on the first carriage 20 between the first carriage 20 and a pallet platform. 50 and includes a second powder transfer window 48. The first carriage 20 scrapes the entire work surface 34 and the second carriage 22 scrapes the entire first carriage 20. The cylinders 42 and 44 are shown schematically. in Figure 2, devices such as pneumatic or hydraulic cylinders, electric ball screw or linear actuators, etc., may be used for this purpose.
    [0013] The powder handling system 14 may be a closed circuit. The powder supply member 16 releases or introduces powder "P" into the first and second powder transfer windows 46 and 48 when the first and / or second powder transfer window (s) is / are aligned with the powder supply member 16 (loading position). The powder recovered in the powder recovery member 18 is recycled by being returned to the powder supply member 16. Suitable means for bringing the powder P into the feed member 16 and 10 to evacuate it of the powder recovery member 18 are known in the art and are beyond the scope of the present invention. By way of non-limiting examples, they may be of the pneumatic or mechanical type. The powder used in the present invention can be any powder capable of being loaded onto a construction platform and melting under the effect of radiant energy. For example, the powder may be metallic, polymeric or ceramic. The construction platform 26 is a plate-like structure slidable vertically in a building chamber 52 of the building enclosure 24 below the opening 36. The construction platform is attached to a jack for selectively raising or lowering the construction platform 26. The cylinder 54 is shown diagrammatically in FIG. 1, devices such as pneumatic or hydraulic cylinders, electric ball screw or linear cylinders, etc., which can be used for this purpose. The directed energy source 28 may comprise any known device for producing a beam of appropriate energy and other operating characteristics to melt and fuse the powder during the construction process, described in more detail later. For example, the directed energy source 28 may be a laser. Other directed energy sources such as electron beam guns are usable solutions in place of a laser. The beam steering device 30 comprises one or more mirrors, prisms and / or lenses provided with adequate actuator (s) and is arranged so that a beam "B" emitted by the source directed energy 28 can be concentrated in the form of a spot of desired dimensions and directed to a desired position in an XY plane which coincides with the work surface 34.
    [0014] The compactor 32 is on the compaction platform 50 and is adapted to compact the powder supplied to the construction platform 26 by the first and second carriages 20 and 22. The compaction platform 50 includes an opening compacting member 56 aligned with the opening 36 to allow a compaction piston 58, such as a piston, of the compactor 32 to exit through the compaction opening 56 and to compact the supplied powder and a feed opening. in powder 64 to allow the powder to flow from the powder feeder 16 to the first and second powder transfer windows 46 and 48. The ram 60 is adapted to actuate the compacting piston 58 between a retracted position, Fig. 2, and an extended position, FIG. 3. The cylinder 62 is designed to move the compactor 32 laterally along the compaction platform 50, between a resting position remote from the opening 36, FIG. 1, and a working position aligned with the opening 36, FIG. 2. Here is the construction method for constructing a part using the device 10 described above. The construction platform 26 is set high by the jack 54, the valve 40 (possibly present) is held in the closed position and the first and second carriages 20 and 22 are placed in the loading position so that the first and second powder transfer windows 46 and 48 are aligned with the powder feed aperture 64 and the powder feeder 16, FIG. 1. The initial high position is located beneath the work surface 34 to a extent equal to a chosen layer increment. The layer increment affects the speed of the additive manufacturing process and the resolution of the part. For example, the layer increment may be from about 10 to 50 microns. With the first and second powder transfer windows 46 and 48 aligned with the powder supply member 16, powder is released or otherwise introduced into the first and second powder transfer windows 46 and 48 from the Powder supply member 16. Optionally used valve 40 prevents the powder from falling freely from the powder supply member 16 through the first and second powder transfer windows 46 and 48 and into the Powder recovery member 18. Depending on the specific type of powder supply and recovery system used, the powder recovery member 18 may continuously contain a certain amount of powder, in which case valve 40 may would not be necessary. The cylinders 42 and 44 jointly engage the first and second carriages 20 and 22 in the feed position, FIG. 2, in which powder P is then deposited on the construction platform 26. The ram 62 moves the compactor 32 from the rest position to the working position so that the compacting piston 58 is aligned with the compaction opening 56, FIG. 2. The cylinder 60 vertically lowers the compacting piston 58, from the retracted position to the extended position, to compact on the construction platform 26 the powder contained in the first and second powder transfer windows 46 and 48. , FIG. 3.
    [0015] The cylinder 42 begins to return the first carriage 20 from the feed position to the loading position, FIG. 4, and the cylinder 60 vertically raises the compacting piston 58, from the extended position to the retracted position, FIG. 5, which suppresses the interaction between the compacting piston 58 and the second carriage 22. Once the compacting piston 58 has come into the retracted position and before the first carriage 20 has finished coming into the loading position, the cylinder 44 returns the second carriage 22 from the feed position to the loading position 10 and the cylinder 62 passes the compactor 32 from the working position to the rest position, FIG. 6. As illustrated in FIGS. 4 and 5, moving from the feeding position to the loading position, the first and second carriages 20 and 22 scrape the entire work surface 34 to remove the unnecessary powder. The unnecessary powder is contained in the first and second powder transfer windows 46 and 48. When the first and second powder transfer windows 46 and 48 are aligned with the recovery opening of the powder 38, the valve 40 (optionally present) opens and the unnecessary powder is released into the powder recovery member 18 to be recycled. Once the unnecessary powder is released into the powder recovery member 18, the valve 40 closes and the first and second powder transfer windows 46 and 48 are again charged to powder P. As noted above, depending on the specific means used to supply and recover the powder P, the valve 40 may not be necessary, in which case the useless powder P simply flows through the powder recovery opening 38.
    [0016] With the compactor 32 in the home position and the first and second carriages 20 and 22 in the loading position, the directed energy source 28 serves to melt a two-dimensional cross section of a workpiece under construction. , FIG. 6. The directed energy source 28 emits a "B" beam and the beam steering device 30 serves to direct the focal spot "S" of the beam B in a suitable figure on the accessible powder surface. The accessible powder layer P is heated by beam B at a temperature which allows it to melt, flow and consolidate. This step can be called melting of the powder P.
    [0017] The construction platform 26 is then lowered vertically to a extent equal to the layer increment and another powder layer P is applied to a similar thickness, as described above with reference to Figures 1 to 5. The source directed energy 28 again emits a beam B and the beam steering device 30 serves to orient the focal spot S of the beam B in a suitable figure on the accessible powder surface. The accessible powder layer P is heated by beam B at a temperature to melt, flow and consolidate both in the upper layer and in the previously solidified lower layer. 6. This cycle comprising the displacement of the construction platform 26, the supply of powder P, the compacting of the powder P, the scraping and the melting of the powder P is repeated until the part is completely finished. .
    [0018] Alternatively, an additive manufacturing process could be performed using a simplified variant of the device 10 described above. For example, the second carriage 22 could be removed and the powder could be transferred from the powder handling system 14 to the building chamber 52, and then scraped, using only the first carriage 20. This can be done with or Without the use of the compactor 32. If the compactor 32 were used with a single carriage, it would be fully retracted before the first carriage 20 was involved to scrape the level of the powder P. The device and method described above offer several advantages over the prior art. They will eliminate the need for a large bed of powder to make a small room, with the concomitant need to manually handle large and heavy volumes of powder. They greatly reduce or eliminate the need for manual cleaning to evacuate powder after a part construction cycle. They are also compatible with a central powder storage and transfer system, which facilitates the development of an additive manufacturing process by using multiple machines in parallel in the same building. The foregoing description has been directed to an additive manufacturing device and method. All the details described in this specification (including any claims, abstracts and accompanying drawings) and / or all steps of any process or process so described may be combined in any combination, except combinations where at least some details and / or steps are mutually exclusive. Unless expressly stated otherwise, all the details described in this specification (including any claims, abstracts and accompanying drawings) may be superseded by other details to support an identical, equivalent or similar function. Thus, unless expressly stated otherwise, each detail described is only one example of a generic series of equivalent or similar details. The invention is not limited to the details of the above form (s) of the invention. The invention extends to any new detail or novel combination of the details described in this specification (including any and all claims, abstracts and drawings appended thereto, or to any new step or combination of any process or process so described.
    [0019] 3035606 20 List of marks 10 Additive manufacturing device 12 Tray 5 14 Powder handling system 16 Powder feed unit 18 Powder recovery unit 20 First truck 22 Second truck 10 24 Construction chamber 26 Construction platform 28 Directed energy source 30 Beam guidance device 32 Compactor 15 34 Working surface 36 Opening 38 Powder recovery opening 40 Hatch 42 Cylinder 20 44 Cylinder 46 First powder transfer window 48 Second powder transfer window 50 Plate compaction form 52 Construction chamber 25 54 Cylinder 56 Compacting opening 58 Compacting piston 60 Cylinder 62 Cylinder 30 64 Powder feed opening
    权利要求:
    Claims (10)
    [0001]
    REVENDICATIONS1. An additive manufacturing device (10), comprising a tray (12) defining a planar work surface (34) having an opening (36), the opening (36) communicating with a construction enclosure (24) containing a platform vertical sliding construction (26); and a first carriage (20) having a first powder transfer window (46), the first carriage (20) being movable over the entire work surface (34) between a loading position remote from the opening ( 36) where the first powder transfer window (46) is accessible to receive powder and a feed position in which the first powder transfer window (46) is aligned above the aperture (36) .
    [0002]
    The apparatus (10) of claim 1, further comprising a second carriage (22) having a second powder transfer window (48), the second carriage (22) being placed over the first carriage (20) and being movable between a loading position remote from the opening (36) where the second powder transfer window (48) is accessible to receive powder and a feed position in which the second powder transfer window (48) is aligned above the opening (36).
    [0003]
    3. Device according to claim 1, further comprising a compactor (32) having a compacting piston (58) able to exit selectively through the first powder transfer window (46) in order to compact the powder contained in the enclosure of construction (24).
    [0004]
    4. Device according to claim 1, further comprising a directed energy source designed to melt and consolidate the accessible powder on the construction platform (26). 3035606 22
    [0005]
    The device of claim 1, further comprising a powder handling system having a powder supply member configured to supply powder to the first powder transfer window (46) in the loading position, and a powder recovery member adapted to receive unused powder removed from the construction platform (26) by being scraped by the first carriage (20).
    [0006]
    A part manufacturing method comprising the steps of: using a device having: a tray (12) defining a planar work surface (34) and an opening (36) therein; and a first movable carriage including a first powder transfer window (46) loading powder into the first powder transfer window (46) at a loading position remote from the aperture (36), and the passage of the first carriage (20) on the tray (12) from a loading position to a feeding position in which the first powder transfer window (46) is aligned above the window (36); Supplying powder from the first powder transfer window (46) to a building platform (26) accessible through the opening (36); returning the first carriage (20) to the loading position to scrape the powder on the construction platform (26) to form a powder layer increment the orientation of a beam from a directed energy source for melting the powder layer increment in a pattern corresponding to a cross-sectional layer of the workpiece; Lowering the construction platform (26) to a extent equal to the layer increment; and cyclically repeating the steps of loading, supplying, returning, melting and lowering to realize the part by layer-by-layer accumulation.
    [0007]
    The method of claim 6, further comprising the step of compacting the powder after it has been delivered to the construction platform (26).
    [0008]
    The method of claim 6, further comprising the steps of: using a powder supply member of a powder handling system to load powder into the first powder transfer window (46) while the first carriage (20) is in the loading position; and using a powder recovery unit of the powder handling system to receive the scraped powder from the first carriage (20).
    [0009]
    The method of claim 6, wherein the device further comprises a second carriage (22) having a second powder transfer window (48), the method further comprises the steps of: loading powder into the second window powder transfer (48) at the same time as loading powder into the first powder transfer window (46); Passing the second carriage (22) together with the first carriage (20) across the tray (12) from the loading position to the feeding position; supplying powder from the second powder transfer window (48) to the construction platform (26) together with supplying powder from the first powder transfer window (46); Compacting the powder supplied to the opening (36) above the construction platform (26); and returning the second carriage (22) to the loading position to scrape the remaining powder on the first carriage (20) after the first carriage (20) has scraped the powder into the opening (36) above of the construction platform (26).
    [0010]
    The method of claim 9, further comprising compacting the powder after it has been supplied to the construction platform (26), using the lateral displacement steps of the compactor of a position resting member remote from the opening (36) to an aligned working position above the first and second powder transfer windows (46,48) and the opening (36) output from a compacting piston (58); ) the compactor (32) 15 into the second powder transfer window (48) for compacting the supplied powder; holding the compacting piston (58) in the second powder transfer window (48) while the first carriage (20) scrapes the powder to form the powder layer increment in the opening above a flat building form (26); removing the compacting piston (58) from the second powder transfer window (48) after the first carriage (20) has formed the powder layer increment; and moving the compactor (32) from the working position to the home position before returning the second carriage (22) to the loading position.
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    同族专利:
    公开号 | 公开日
    FR3035606B1|2019-07-19|
    US20160318102A1|2016-11-03|
    CN106077637A|2016-11-09|
    US10391556B2|2019-08-27|
    CN106077637B|2020-09-15|
    DE102016107769A1|2016-11-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
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    法律状态:
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    2018-04-27| PLSC| Search report ready|Effective date: 20180427 |
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    2021-03-23| PLFP| Fee payment|Year of fee payment: 6 |
    优先权:
    申请号 | 申请日 | 专利标题
    US14/698,190|US10391556B2|2015-04-28|2015-04-28|Powder transfer apparatus and method for additive manufacturing|
    US14698190|2015-04-28|
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