• 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:
    Machine (1) for additive manufacturing of a workpiece (2) by total or partial selective melting of a powder, the machine (1) comprising: - a work enclosure (100); - a jacket (3) having an opening (4) upper opening into the chamber (100) of work, and having a central axis (5) central vertical - a plate (6) support for receiving the piece (2) in during the manufacturing process, a device (7) for actuating the support plate (6) in translation in the jacket (3) along the central vertical axis (5) of the jacket (3), - a system (8) for extraction of the part (2) comprising a container (9), the extraction system (8) further comprising at least one movable closure plate (12) for closing the lower opening (15) of the container (9).
    公开号:FR3050956A1
    申请号:FR1654061
    申请日:2016-05-04
    公开日:2017-11-10
    发明作者:Jean-Pierre Nicaise；Gilles Walrand
    申请人:Fives Michelin Additive Solutions SAS；
    IPC主号:
    专利说明:

    The invention relates to the field of so-called additive manufacturing, also commonly known as 3D printing. More specifically, the invention relates in particular to the evacuation of a part after its manufacture by 3D printing.
    3D printing techniques make it possible to manufacture pieces of complex geometries, which conventional techniques such as molding, cutting or extrusion do not allow to achieve, or parts for which these conventional techniques do not allow 'reach the level of precision required.
    There are several additive manufacturing techniques. A widespread technique is to manufacture a piece in successive slices, from a material distributed on a working surface in the form of powder. A first layer of material is dispensed onto the work surface. A source of energy, for example provided by a laser, makes it possible to solidify the wafer of the part to be manufactured in the layer of material. The grains of powder are welded together according to different physical processes depending in particular on the nature of the material, so as to form a continuity in the material. It may be for example melting powder grains to agglomerate. In the following, the set of physical processes for solidifying the powder will be referred to as total or partial fusion.
    Optionally, the work surface is then lowered from a height corresponding to the next layer height. The next layer is then spread out, the next slice is drawn in this layer, and so on.
    US 5,597,589 discloses an exemplary embodiment of the above technique. More specifically, according to this example, a manufacturing machine comprises a powder dispenser, in this case metallic, for depositing a first portion of powder on a target region. A roll may optionally spread the powder. A laser beam selectively fuses a first layer corresponding to a first portion of the part to be manufactured. The process is then repeated layer by layer.
    In order to allow the successive formation of layers of determined thickness, it is known that the working surface is of adjustable height. For this purpose, the working surface is formed on a work support platform which is slidably mounted in a jacket forming the manufacturing chamber. The support platform is lowered into the chamber as the slices of the workpiece are formed.
    Once the complete part is finished, it therefore rests on the platform, in a low position in the manufacturing chamber, and bathes in the powder that has not been reached by the energy source.
    A problem that arises then is to extract the finished piece. Indeed, the powder that has not been exposed to the energy source may spread in the machine, which is not desirable for reasons including maintenance of the machine, control of the nature of the materials employees and speed of cleaning and re-production of the machine.
    Document US Pat. No. 5,846,370 proposes to remove from the machine the production chamber containing the finished part and the powder. Optionally, a cover can be returned to the manufacturing chamber before removing it to prevent the finished part and the powder from being exposed to the air.
    Document US 2012/0090734 also proposes extracting the finished part by removing the manufacturing chamber. More specifically, the manufacturing chamber comprises an internal box housed in an external box, the inner box being removable relative to the outer box. For this purpose, the outer casing is provided with a hatch-type reclosable opening, making it possible to remove the inner casing containing the finished piece and the remaining powder from the internal casing, and to place a new inner casing therein.
    These two examples have the particular disadvantages of complicating the structure of the manufacturing machine and imposing constraints on the manufacturing chamber. However, the manufacturing chamber may require the establishment of temperature control means or control of the gas surrounding the room. Thus, the removal and replacement of the manufacturing chamber can be tedious and time consuming. The fact of having to provide several manufacturing chambers also increases the costs.
    Document US 2001/0045678 proposes to push the finished part and the unexposed powder out of the manufacturing chamber into a powder removal section of the machine. The piece and the powder are then found on a mesh support. The powder is detached from the workpiece for example by vibrations and is evacuated through the mesh support.
    This solution, however, assumes that the unexposed powder is sufficiently compacted to follow the workpiece from the manufacturing chamber to the powder removal section, which limits the materials that can be employed, and the manufacturing conditions.
    The document WO 2014/044705 proposes to place a box above the jacket, to raise the part support platform together with the finished part and the non-solidified powder, and to close the box by means of the platform. .
    A disadvantage of this solution is that the work platform must be adapted to close the box, increasing manufacturing costs. In addition, the work platform is an interchangeable part, so that costs are multiplied by as many platforms as it is necessary to store. On the other hand, during the production of the part, and repeated ups and downs of the tray related to the manufacturing process, the closure system of the box can be filled with powder or deteriorate which can affect its function and generate leaking powder during handling operations.
    There is therefore a need for a new additive manufacturing machine overcoming the aforementioned drawbacks.
    A first object of the invention is to propose an additive manufacturing machine comprising a system for extracting the finished part without significantly increasing the costs of the device.
    A second object of the invention is to provide an additive manufacturing machine comprising a finished part extraction system that does not require a review of the design of the manufacturing device.
    A third object of the invention is to provide an additive manufacturing machine comprising a finite part extraction system for reliably removing from the manufacturing device the powder that has not been exposed.
    A fourth object of the invention is to propose a system for extracting the finished part by a completely external system whose constituents can not be degraded by the environment and the operations of making the part. For this purpose, according to a first aspect, the invention proposes a machine for additive manufacturing of a part by total or partial selective melting of a powder. The machine comprises: a work enclosure; a liner having an upper opening opening into the working enclosure, and having a vertical central axis, a support plate for receiving the part being manufactured, an actuating device in translation of the support plate in the liner according to the vertical central axis of the liner, a part extraction system comprising a container comprising at least one lower opening in the direction of the upper opening of the liner, the container being mounted movably in the working chamber with respect to the sleeve between a waiting position in which the container is away from the opening of the jacket and an operating position in which the lower opening of the container coincides at least partially with the upper opening of the jacket.
    The support plate is then moved by the actuating device from the jacket to the inside of the container in the operating position, and the extraction system further comprises at least one movable closure plate relative to the container in the working enclosure along at least one horizontal axis to close the lower opening of the container, this closure plate being distinct from the support plate.
    The extraction system can then form an independent assembly of the elements involved during the manufacture of the part, so that it does not impact the design and operation of these elements.
    The machine can have the following other characteristics, considered alone or in combination: the container can move between a standby position and an operating position along a supply axis parallel to the vertical central axis of the sleeve; the container can move between a standby position and an operating position along a feed axis perpendicular to the vertical central axis of the sleeve; the container can move between an operating position and an extraction position in which the container is outside the working chamber; the actuator may comprise a piston, the support plate being removably mounted on the piston, the closure plate interposed between the support plate and the piston to close the lower opening of the container; the extraction system comprises a removable hooking device between the closure plate and the container; the extraction system comprises at least one seal between the closure plate and the container.
    According to a second aspect, the invention may relate to a method of additive manufacturing of a part by total or partial selective melting of a powder by the implementation of the machine as presented above. According to the method, after manufacture of the piece: the container is moved relative to the jacket from a waiting position to an operating position above the upper opening of the jacket, the support plate is displaced along the vertical central axis by the actuating device to the inside of the container, the closure plate is moved in translation relative to the sleeve to close the lower opening of the container, or the container is moved in translation along a horizontal axis relative to the jacket on the closure plate to close the lower opening of the container.
    Optionally, after the closure of the lower opening of the container by the closure plate, the container and the closure plate can be moved together in an extraction position outside the working chamber of the machine. Other features and advantages will become apparent in the light of the description of the preferred embodiments of the invention accompanied by the figures in which: FIGS. 1 to 4 are diagrammatic representations of the interior of an additive manufacturing machine according to a first embodiment, Figures 5 and 6 are schematic representations of the interior of the additive manufacturing machine, similar to those of Figures 1 to 4, according to a second embodiment.
    In Figures 1 to 6, there is shown a machine 1 for additive manufacturing of a part 2 by selective melting, total or partial, of a material in powder form. The material may be in particular metal or plastic.
    The machine 1 comprises in particular a chamber 100 of manufacture, constituting a space closed to the controlled atmosphere. In particular, the enclosure 100 is filled with a gas inert with respect to the material used, to limit corrosion. The enclosure 100 of manufacture is delimited by an upper wall 101, a lower wall 102, and side walls 103. The bottom wall 102 forms a work surface on which the powder is spread.
    The machine 1 comprises a jacket 3 comprising an upper opening 4 coinciding with an opening in the plane 102 of work and opening into the enclosure 100. More specifically, the jacket 3 extends along a central vertical axis 5 between the opening 4 upper, upwardly, and a bottom 14, which can be open or not. The side wall of the liner 3 can thus serve as a guide for a part support plate 6.
    In the following, for purposes of clarity, the horizontal direction and the vertical direction correspond to the natural orientation of Figures 1 to 6. Similarly, the terms "high", "low", "lower", "higher" and their variants should be understood with reference to the vertical direction of the figures.
    The workpiece support plate 6 is intended to receive the workpiece 2 during manufacture. It is actuated in vertical displacement along the central axis 5 by an actuating device 7. The actuating device 7 comprises for example a piston on which the support plate 6 is fixed, directly or indirectly. For example, a heating device may be arranged between the support plate 6 and the piston to control the temperature of the plate 6. Preferably, the attachment between the support plate 6 and the actuating device 7 is of removable type. Thus, the support plate 6 can be removed from the actuating device 7, for example to be taken out of the machine 1.
    The machine 1 further comprises a melting system, not shown, allowing the powder grains to fuse to agglomerate. This is for example a laser system, sending a beam on the powder inside the chamber 100 work.
    Thus, the piece 2 is manufactured layer by layer by total or partial melting of the powder. Each layer of powder is distributed and spread successively on the plane 102 of work, so as to cover at least part of the workpiece support tray 6, the tray 6 being lowered into the sleeve 3 at a height determined between each layer.
    Thus, when the piece 2 is finished, it is entirely in the jacket 3, between the upper opening 4 and the bottom 14, on the support plate 6. As all the powder of each layer is not necessarily fused, the rest of the unfused powder surrounds the piece 2 in the jacket 3.
    In order to extract the finished piece 2 out of the jacket, the machine 1 further comprises a system 8 for extracting the coin 2.
    The extraction system 8 comprises at least one container 9, the dimensions of which are at least equivalent to those of the jacket 3, so that the volume of the container 9 is at least equal to the volume of the jacket 3. The container 9 comprises at least, and preferably only, a bottom opening 15 facing downwards. The container 9 may for example have a generally cylindrical shape, square or circular section. The dimensions of the lower opening of the container 9 are greater than those of the workpiece support plate 6, which can then pass through the lower opening 15. Preferably, the dimensions of the lower opening of the container 9 are greater than the dimensions of the upper opening 4 of the sleeve 3, so that the container 9 can bear on the plane 102 of work by covering the opening 4 upper of the shirt 3.
    The container 9 thus forms a receptacle for the finished part 2 and the unfused powder.
    The container 9 is mounted to move in translation in the machine 1 relative to the jacket 3 so as to take at least two positions: a waiting position, in which the container 9 is away from the upper opening 4 of the liner 3, so as to let the beam reach the powder to be fused; an operating position, in which the container 9 is placed on the upper opening 4 of the liner, the lower opening 15 of the container 9 coinciding at least partially with the upper opening 4 of the liner 3, so as to allow the passage of the finished piece 2 from the jacket 3 inside the container 9.
    More specifically, when the container 9 is in the operating position, the part 2 can pass from the liner 3 into the container 9 by passing through the upper opening 4 of the liner and the lower opening 15 of the container 9 by moving the tray 6 support upwards by the actuating device 7.
    The extraction system 8 further comprises a closure plate 12, for closing the lower opening 15 of the container 9 when the part 2 and the support plate 6 are inside. For this purpose, the closure plate 12 is movable relative to the container 9 along at least one horizontal axis to slip under the container 9 and close its lower opening 15 once the part 2 and the support plate 6 are placed in position. inside the container 9.
    Thus, to obtain the closure of the lower opening of the container 9, the closure plate 12 remains fixed in the enclosure 100, with respect to the jacket 3, and the container 9 moves horizontally relative to the plate 12 of closure, the container 9 remains fixed relative to the jacket 3, and it is the closure plate 12 which moves horizontally relative to the container 9.
    Once the container 9 is closed by the closure plate 12, it can again be moved, together with the closure plate 12, in an extraction position in which it can be removed from the chamber 100 of manufacture .
    The extraction system 8 may furthermore comprise a device 13 for detachably hooking up between the closure plate 12 and the container 9. This is any device making it possible to temporarily fix the closure plate 12 to the container 9. It may be for example a device with retractable pins, snap, or a suction device.
    Two examples of implementation of the extraction system 8 will now be described with reference to the two embodiments of the machine 1 shown in FIGS. 1 to 6.
    According to a first embodiment (FIGS. 1 to 4), the container 9 moves in translation between a waiting position and an operating position along a feed axis, which is horizontal, that is, say perpendicular to the central axis 5 of the liner 3.
    While the part 2 is being manufactured, the container 9 is kept in the standby position, away from the upper opening 4 of the jacket 3 to leave it unobstructed and allow the laser beam to reach the powder to merge it. The closure plate 12 is then also in a position away from the upper opening 4 of the sleeve 3 as the part 2 is being manufactured. The closure plate 12 is placed closer to the plane 102 of work, with a fair enough clearance to allow the sliding of the closure plate 12 relative to the plane 102 work. For example, the container 9 in the waiting position is placed above the closure plate 12 in the initial position, the edges of its lower opening 15 being in contact with the closure plate 12.
    Once the piece 2 is finished, the container 9 is initially moved in the enclosure 100 along the axis of supply, the edges of the lower opening 15 sliding on the plate 12 of closure which remains fixed . In a second step, the container 9 is moved in the enclosure 100 perpendicularly to the supply axis, or parallel to the central axis of the liner 3, so that the lower opening 15 of the container 9 comes into coincidence with the upper opening 4 of the jacket 3.
    When the container 9 is in the operating position, the actuating device 7 is used to move the support plate 6 upwards, so that the assembly consisting of the support plate 6, the part 2 and the powder surrounding it is transferred into the container 9. As the edges of the lower opening of the container 9 are in contact with the plane 102 of work around the upper opening 4 of the jacket 3, the powder can not be used. escape during the transfer due to the continuity between the upper opening 4 of the liner 3 and the lower opening 15 of the container 9.
    Once the assembly is inside the container 9, and as illustrated in Figure 3, the container 9 and the support plate 6 are moved parallel to the central axis 5 of the sleeve 3, and therefore vertically , a height h substantially corresponding to the thickness e of the closure plate 12.
    Then, the container 9 is again moved horizontally, along an axis which is, according to the example presented here, the same axis 10 of supply, the closing plate 12 remaining still immobile. Before or at the same time, the support plate 6 separates from the piston of the actuating device 7, then the support plate 6 is slid horizontally relative to the piston of the actuating device 7, driven by the horizontal displacement of the container 9. container 9 then returns in the same position as the waiting position, carrying the support plate 6, the finished part 2 and the powder surrounding it, above the closure plate 12, so that the edges of the opening 15 of the container 9 are in contact with the closure plate 12. The lower opening of the container 9 is thus closed by the closure plate 12.
    The hooking device 13 is then actuated to secure the closure plate 12 and the container 9.
    Preferably, in parallel with the attachment device 13, there is provided a seal 16 between the closure plate 12 and the container 9. This seal 16 prevents the powder from escaping from the formed enclosure by the container 9 and the closure plate 12. Thus, it is possible to extract the finished part 2 and the powder surrounding it by limiting the health risks for operators located near the machine. In addition, by preventing the penetration of air inside the enclosure formed by the container 9 and the closure plate 12, the seal 16 makes it possible to prevent pollution and oxidation of the powder merged, which facilitates the reuse of this powder for the manufacture of new parts.
    The container 9 closed by the closure plate 12 and containing the finished part 2 can then be brought to a cleaning station to remove the unfused powder. The cleaning station can be formed in a dedicated compartment of the machine 1, separated from the chamber 100 of manufacture. In this case, the container 9 and the closure plate 12 are provided to be moved to the dedicated compartment. The cleaning station can be separated from the machine. In this case, the container 9 and the closure plate 12 are designed to be removable relative to the machine 1. The seal 16 between the container 9 and the plate 12 then makes it possible to avoid the powder of oxidize during transport from the machine to the cleaning station. The powder can then be recovered and recycled.
    Preferably, however, in all cases, once the container 9 closed by the closure plate 12, to avoid having to open the chamber 100 to manufacture inert atmosphere, the container 9 is moved to a position of extraction, outside the enclosure 100 of manufacture. For example, the container moves in translation towards the extraction position along an extraction axis 11, which may be horizontal or vertical, and in particular which may be coincident with the supply axis. An outlet hatch may be formed on the upper wall 101 or on one of the side walls 103 of the enclosure 100 to let the container 9 out of the chamber 100 manufacturing extraction position, for example in a lock allowing an operator to have access to the container 9 containing the finished part, already cleaned or not powder.
    Before starting the manufacture of a new part, a new part support plate 6 is secured to the piston of the actuating device 7 in the chamber 100 of manufacture.
    According to a second embodiment (FIGS. 5 and 6), the container 9 moves in translation between a waiting position and an operating position along a feed axis, which is vertical, that is to say say parallel to the central axis 5 of the liner 3, and in this case according to the second example presented here, coincides with the central axis 5.
    Thus, the container 9 is placed in a waiting position above the liner 3, sufficiently away from the upper opening 4 to let the laser beam reach the powder. The closure plate 12 is then in an initial position, also away from the opening 4 of the jacket 3, which is similar, but not necessarily, to that of the preceding example. Then, the container 9 is moved along the axis of supply into the operating position, in which its lower opening 15 is brought into coincidence with the upper opening 4 of the jacket 3. As in the first embodiment the edges of the lower opening of the container 9 are in contact with the plane 102 of work around the upper opening 4 of the jacket 3, and the powder can not escape during the transfer because of the continuity between the upper opening 4 of the liner 3 and the lower opening 15 of the container 9.
    The actuating device 7 then raises the assembly formed of the support plate 6, the finished part 2 and the powder surrounding it inside the container 9.
    More specifically, the actuating device 7 rises parallel to the central axis 5 of the liner 3 the assembly formed of the support plate 6, the finished part 2 and the surrounding powder to a height h corresponding substantially at the thickness e of the closure plate 12. Subsequently, the container 9 also rises parallel to the central axis 5 of the liner to a height h substantially corresponding to the thickness e of the closure plate 12, as can be seen in FIG.
    Thus, the closure plate 12 can be moved horizontally from its initial position to come between the upper opening 4 of the liner 3 and the lower opening 15 of the container 9, in contact with the edges of the opening 15 lower and under the support plate 6. At the same time as the closing plate 12 moves, it is planned to separate the device 7 for actuating the support plate 6 to allow the closure plate 12 to completely cover the lower opening 15 of the container 9.
    The hooking device 13 is then actuated to secure the closure plate 12 and the container 9, and the seal 16 seals between the closure plate 12 and the container 9.
    As in the first embodiment, once the container 9 closed by the closure plate 12, it can again be moved to an extraction position in an airlock accessible to an operator, by passing out of the enclosure 100 of manufactured by an exit hatch. The lock can form a powder cleaning station in the machine 1, so that an operator opening the lock has direct access to the cleaned part of powder. The operator can also remove the container 9 closed by the closure plate 12 to take the piece to a cleaning station away from the machine 1.
    For example, the container 9 is moved in extraction position by translation along an extraction axis 11, which may be coincident with the supply axis, so that the container 9 is moved to the extraction position by being raised. The supply axis 10 and the extraction axis 11 are not necessarily oriented in the same direction. The extraction axis 11 can thus be horizontal, not coincident with the supply axis.
    The dimensions of the container 9 being greater than those of the support plate 6, the latter does not participate in closing the container 9, which facilitates the design of the support plate 6. Indeed, the support plate 6 does not require any particular characteristic.
    In addition, when the support plate 6 is inserted in the container 9 with the piece 2 and the non-solidified powder, the gas in the container can escape through the lower opening 15, avoiding an increase in pressure in the container 9.
    Alternatively, in the two embodiments presented, the container 9 may be equipped with a device 17, such as for example a valve or a filter, allowing the gas present in the container to pass through and to retain the powder to prevent any leakage. of powder linked to the movement of gas during the rise of the volume of the part and the powder in the container.
    In the two embodiments shown, the container 9 is movable along the feed axis 10 and the extraction axis 11 which are rectilinear. They may, however, be curvilinear, or consist of several rectilinear sections inclined relative to each other.
    权利要求:
    Claims (10)
    [1" id="c-fr-0001]
    1. Machine (1) for the additive manufacturing of a workpiece (2) by total or partial selective melting of a powder, the machine (1) comprising: a work enclosure (100); a jacket (3) having an upper opening (4) opening into the chamber (100) of work, and having a vertical central axis (5), a support plate (6) intended to receive the piece (2) being manufacturing, a device (7) actuating in translation of the plate (6) support in the liner (3) according to the vertical central axis (5) of the liner (3), a system (8) for extracting the piece (2) comprising a container (9) comprising at least one lower opening (15) in the direction of the upper opening (4) of the liner (3), the container (9) being mounted movably in the enclosure (100) ) with respect to the liner (3) between a waiting position in which the container (9) is away from the opening (4) of the liner (3) and an operating position in which the lower opening (15) of the container (9) coincides at least partially with the upper opening (4) of the liner (3), the support plate (6) and moved by the actuating device (7) from the jacket (3) to the inside of the container (9) in the operating position, the extraction system (8) further comprising at least one tray ( 12) movable closure relative to the container (9) in the chamber (100) of work along at least one horizontal axis to close the opening (15) of the lower container (9), the plate (12) closing being separate from the support plate (6).
    [2" id="c-fr-0002]
    2. Machine (1) of manufacture according to claim 1, wherein the container (9) moves between a standby position and an operating position along a axis (10) of supply parallel to the axis (5). ) vertical central of the shirt (3).
    [3" id="c-fr-0003]
    3. Machine (1) of manufacture according to claim 1, wherein the container (9) moves between a standby position and an operating position along a axis (10) of supply perpendicular to the axis (5). ) central vertical of the shirt.
    [4" id="c-fr-0004]
    4. Machine (1) manufacturing according to any one of the preceding claims, wherein the container (9) moves between an operating position and an extraction position in which the container (9) is outside the enclosure (100) of work.
    [5" id="c-fr-0005]
    5. Manufacturing machine according to any one of the preceding claims, wherein the device (7) for actuation comprises a piston, the plate (6) support being removably mounted on the piston, the plate (12) closure interposed between the support plate (6) and the piston to close the lower opening (15) of the container (9).
    [6" id="c-fr-0006]
    6. Manufacturing machine according to any one of the preceding claims, wherein the system (8) of extraction comprises a device (13) for attachment removably between the plate (12) closing and the container (9).
    [7" id="c-fr-0007]
    7. Manufacturing machine according to any one of the preceding claims, wherein the extraction system (8) comprises a seal (16) between the plate (12) closure and the container (9).
    [8" id="c-fr-0008]
    8. Process for the additive manufacturing of a part (2) by total or partial selective melting of a powder by the implementation of the machine (1) according to any one of the preceding claims, characterized in that, after the manufacture of the piece (2): the container (9) is moved relative to the jacket (3) from a standby position to an operating position above the upper opening (4) of the liner (3), the support plate (6) is displaced along the central vertical axis (5) by the actuating device (7) to the inside of the container (9), the closing plate (12) is moved in translation relative to the liner (3) to close the lower opening (15) of the container (9).
    [9" id="c-fr-0009]
    9. Process for the additive manufacturing of a part (2) by total or partial selective melting of a powder by the implementation of the machine (1) according to any one of claims 1 to 7, characterized in that, after manufacture of the part (2): the container (9) is moved relative to the sleeve (3) from the standby position to the operating position above the upper opening (4) of the liner (3), the support plate (6) is displaced along the central vertical axis (5) by the actuating device (7) to the inside of the container (9), the container (9) is moved in translation along a horizontal axis relative to the jacket (3) on the plate (12) closing to close the opening (15) of the lower container (9).
    [10" id="c-fr-0010]
    10. The method of claim 8 or claim 9, wherein, after closing the opening (15) of the lower container (9) by the plate (12) closing, the container (9) and the tray (12). ) closing are moved together in an extraction position outside the enclosure (100) of the machine work (1).
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    同族专利:
    公开号 | 公开日
    CN109070456B|2020-07-31|
    KR102215274B1|2021-02-15|
    JP6873158B2|2021-05-19|
    KR20190004707A|2019-01-14|
    JP2019516580A|2019-06-20|
    WO2017191250A1|2017-11-09|
    US20190134909A1|2019-05-09|
    FR3050956B1|2018-05-25|
    CN109070456A|2018-12-21|
    EP3452270A1|2019-03-13|
    US10875249B2|2020-12-29|
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    优先权:
    申请号 | 申请日 | 专利标题
    FR1654061A|FR3050956B1|2016-05-04|2016-05-04|ADDITIVE MANUFACTURING MACHINE COMPRISING AN EXTRACTION SYSTEM AND ADDITIVE MANUFACTURING METHOD BY CARRYING OUT SUCH A MACHINE|
    FR1654061|2016-05-04|FR1654061A| FR3050956B1|2016-05-04|2016-05-04|ADDITIVE MANUFACTURING MACHINE COMPRISING AN EXTRACTION SYSTEM AND ADDITIVE MANUFACTURING METHOD BY CARRYING OUT SUCH A MACHINE|
    JP2018557339A| JP6873158B2|2016-05-04|2017-05-04|Additive manufacturing machines with retrieval systems and additive manufacturing methods using such machines|
    CN201780025811.9A| CN109070456B|2016-05-04|2017-05-04|Additive manufacturing machine comprising an extraction system and additive manufacturing method using such a machine|
    PCT/EP2017/060643| WO2017191250A1|2016-05-04|2017-05-04|Additive manufacturing machine comprising an extraction system and method of additive manufacturing by using such a machine|
    US16/098,729| US10875249B2|2016-05-04|2017-05-04|Additive manufacturing machine comprising an extraction system and method of additive manufacturing by using such a machine|
    EP17723958.9A| EP3452270A1|2016-05-04|2017-05-04|Additive manufacturing machine comprising an extraction system and method of additive manufacturing by using such a machine|
    KR1020187031558A| KR102215274B1|2016-05-04|2017-05-04|Additive Manufacturing Machine Including Extraction System And Additive Manufacturing Method Using Such Machine|
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