Binder jet additive manufacturing system

Abstract

The invention relates to a powder bed fusion additive manufacturing system (1) comprising a build chamber (2) extending along a vertical axis (Z) and a removable container (10) which can be inserted into the build chamber (2) in a manufacturing configuration and removed from the build chamber (2) in a powder removal configuration, the removable container (10) comprises a side wall (20) extending along a vertical axis (Z) and a bottom wall (30) movable within the side wall (20) along the vertical axis (Z), the bottom wall (30) comprising a perforated first wall (31) having a first aperture (33), the first aperture (33) being closed in a manufacturing configuration and opened in a depowdering configuration.

Description

Technical Field

[0001] The present invention relates to the field of additive manufacturing of parts. More specifically, the present invention relates to a system and method for additive manufacturing by powder bed fusion of metal or ceramic powders, particularly for use in the aerospace field, such as the manufacture of turbine engine parts. Background Art

[0002] Additive manufacturing processes based on powder bed fusion and binder jetting, commonly referred to as binder jetting, are known for their ability to easily and quickly produce three-dimensional parts of complex shapes. These technologies are particularly used in the aerospace sector, particularly for the manufacture of complex-shaped metal parts.

[0003] Figure 1 A and 1B schematically show partial cross-sectional views of a machine for binder jetting additive manufacturing, each of which represents one of the two stages of manufacturing a part 6. Specifically, the binder jetting additive manufacturing process sequentially includes the steps of depositing a powder layer 7 on a build plate 5, followed by selectively spraying a liquid binder through a nozzle to solidify (by binder polymerization) a portion of the part 6 on the build plane. The build plane is substantially perpendicular to the vertical axis Z corresponding to the manufacturing direction. The powder layer 7 is spread laterally on the build plate 5 by a scraper. The build plate 5 is then translated downward along the vertical axis Z in the build cylinder 4 to allow the next layer of powder to be deposited. The above steps are repeated in sequence to form at least one part 6 called a "green part" layer by layer.

[0004] A "de-powdering" step is typically performed to remove uncured powder and expose the green part. A degreasing step is then performed to remove most of the binder from the green part. At the end of this step, "brown parts" are obtained, which contain a network of interconnected pores. This pore network is the reason why brown parts are fragile and lack mechanical strength, making the handling of brown parts a process step that requires caution. The brown parts are then heat treated to remove binder residues and ensure the cohesion of the parts by forming strong bonds between particles through material diffusion, which eliminates pores and achieves material densification. This process is called sintering, and the final result is a sintered part.

[0005] Obviously, green and brown parts are usually very fragile, and only after the sintering step can the parts achieve good mechanical strength. The de-powdering step is one of the critical steps and may cause damage or deformation of the green part.

[0006] More specifically, a preliminary step, known as "unloading," is traditionally performed to remove the powder content comprising the green part from the build cylinder. This step can lead to breakage of the green part due to the forces exerted by the powder on the green part. Furthermore, this step can involve extended exposure of AM machine users to the suspended loose powder, posing a high HSE risk.

[0007] Furthermore, a step is required to remove excess powder from the green part, such as techniques using airflow or mechanical motion. These techniques may also damage the green part.

[0008] The present invention aims to address at least some of the above-mentioned problems by proposing a binder jetting additive manufacturing system and associated methods to improve the de-dusting of manufactured parts, thereby reducing the risk of damage to the green part. Summary of the Invention

[0009] The present invention provides a binder jetting additive manufacturing system comprising a build chamber extending along a vertical axis and a removable container capable of being inserted into the build chamber in a manufacturing configuration and removed from the build chamber in a de-powdering configuration. The removable container includes a sidewall extending along the vertical axis. Furthermore, the removable container includes a bottom wall movable within the sidewall along the vertical axis, the bottom wall including a perforated first wall having a first orifice that is closed in the manufacturing configuration and opened in the de-powdering configuration. "Closed" should be understood as preventing powder flow from passing through the orifice, and "opened" should be understood as allowing powder flow to freely pass through the orifice. In other words, in the manufacturing configuration, the removable container is advantageously housed within the build chamber with the first orifice in the perforated first wall closed. The bottom wall translates downwardly along the vertical axis during the manufacturing process. In the de-powdering configuration, the removable container can be removed from the build chamber, for example, into a de-powdering area, with the first orifice in the perforated first wall opened to allow powder to flow out through the first orifice. The perforated first wall performs a sieving function, retaining the parts and allowing the powder to flow from the removable container by gravity.

[0010] Such a system can facilitate and improve the de-powdering of green parts manufactured by sequential layer-by-layer deposition of powder and binder jetting. Indeed, the detachable container allows to be easily removed from the build chamber and moved to a de-powdering area, which is a block formed by powder in which at least one green part is embedded. Such a detachable container can also be easily used with existing binder jetting additive manufacturing machines. In the de-powdering area, opening the first orifice of the perforated first wall helps to discharge powder through the bottom wall while reducing the risk of deformation or even breakage of at least one green part. The detachable container can transfer green parts, even green parts of smaller size and / or lighter weight. In addition, the detachable container is advantageously compatible with de-powdering techniques involving immersion in a liquid bath, blowing or mechanical vibration. In addition, the detachable container according to the present invention allows to limit user exposure to powder, for example, when handling a binder jetting additive manufacturing system.

[0011] The features in the following paragraphs can be implemented independently or in combination.

[0012] The maximum dimension of the first orifice perforating the first wall is preferably smaller than the smallest dimension of the at least one feature manufactured in the collapsible container, preferably smaller than 50% of the smallest dimension of the at least one feature.

[0013] The first opening perforating the first wall may be circular, elliptical or polygonal, such as quadrilateral.

[0014] The first apertures perforating the first wall may have a regular pattern or a varying pattern.

[0015] The bottom wall may advantageously include a third wall that is detachably secured to the perforated first wall and that, when secured to the perforated first wall, abuts against the perforated first wall to close the first orifice of the perforated first wall. This feature allows the first orifice of the perforated first wall to be easily opened by detaching the third wall from the perforated first wall.

[0016] The third wall can in particular come to rest against the perforated first wall from the outside.Outside is to be understood as the opposite side relative to the inside of the removable container.

[0017] The third wall can in particular be plate-shaped.

[0018] The third wall may be substantially solid. Solid is understood to mean that the third wall does not contain orifices that allow powder to pass through.

[0019] In particular, the perforated first wall may be interposed between the volume receiving the powder and the third wall along the vertical axis.

[0020] The third wall can be movable relative to the perforated first wall. For example, the third wall and the perforated first wall can be slidably connected, for example along an axis substantially perpendicular to the vertical axis. The third wall can be removed from the perforated first wall by sliding along the axis.

[0021] The third wall and the perforated first wall may be secured together by screws, such as quarter-turn screws.

[0022] Advantageously, the third wall may include first projections configured to cooperate with the first aperture to close the first aperture of the perforated first wall. In other words, the first projections of the third wall may fit into the first aperture of the perforated first wall. The third wall and the perforated first wall may together form a manufacturing support surface facing the interior of the removable container. The manufacturing support surface is advantageously planar.

[0023] The bottom wall may include a build plate. A build plate is understood to be a plate that provides mechanical support for the mass formed by the powder and part. The build plate may also drive the bottom wall along a vertical axis during the manufacturing process.

[0024] The third wall can specifically include a build plate. Specifically, the build plate can constitute the third wall. Furthermore, when the build plate is secured to the perforated first wall, the build plate can abut against the perforated first wall to close the first orifice of the perforated first wall. Since binder jetting additive manufacturing machines typically include a build plate, this feature allows such a build plate to be used to provide mechanical support for the block formed from the powder and part, and to close the first orifice of the perforated first wall.

[0025] Alternatively, the third wall may be inserted between the perforated first wall and the building plate.The third wall may in particular be placed on the building plate and in particular be detachably fixed to the building plate.

[0026] The side wall may advantageously comprise a perforated second wall having second orifices which are closed in the manufacturing configuration and open in the de-dusting configuration.This technical feature allows de-dusting operations to be performed through the side wall of the removable container.

[0027] The perforated second wall may be perforated in the same or a different pattern than the perforated first wall.

[0028] The maximum dimension of the second aperture perforating the second wall is preferably smaller than the smallest dimension of the at least one feature manufactured in the collapsible container, preferably smaller than 50% of the smallest dimension of the at least one feature manufactured in the collapsible container.

[0029] The second opening perforating the second wall may be circular, elliptical or polygonal, such as a quadrilateral.

[0030] The second apertures perforating the second wall may have a regular pattern or a varying pattern.

[0031] The side wall may include a fourth wall removably secured to the perforated second wall to close the second orifice in the manufacturing configuration and to open the second orifice in the de-dusting configuration.

[0032] The fourth wall may be detachably abutted against the outer side of the perforated second wall.

[0033] The fourth wall may advantageously comprise second projections which are adapted to cooperate with the second aperture to close the second aperture of the perforated second wall. In particular, the fourth wall and the perforated second wall may form an inner periphery facing the interior of the removable container, the inner periphery being plane.

[0034] The second orifice can be arranged at a lower position of the perforated second wall along the vertical axis. The lower position of the perforated second wall can particularly extend from the lower end of the perforated second wall to less than 75% of the side wall height, preferably less than 50% of the side wall height.

[0035] The side walls may comprise means for securing the bottom wall. Thus, the bottom wall may be held by the side walls during transfer of the removable container to the de-powdering area.

[0036] The sidewalls may include a shoulder at their lower ends, against which the bottom wall is intended to rest, thereby being supported. This feature allows the bottom wall to remain in a vertical position. In particular, the perforated first wall may rest against the shoulder. Thus, during the de-dusting process, the perforated first wall can be supported by the sidewalls.

[0037] The system according to the invention can advantageously comprise a sealing device for sealing the upper opening of the removable container. The sealing device can comprise a lid intended to rest against the upper periphery of the removable container. The lid can be fixed to the removable container, for example, by a clamping device.

[0038] The bottom wall can advantageously be driven along a vertical axis by a removal element detachably mounted on the bottom wall. The removal element can in particular consist of a piston, mounted on the bottom wall, for example, by means of a thread and a nut. The piston can be provided with a nut, and the bottom wall with a thread. Conversely, the piston can be provided with a thread, and the bottom wall with a nut.

[0039] In the manufacturing configuration, the removable container may advantageously be secured to the build chamber and / or the frame of the additive manufacturing system via mechanical or magnetic retention devices, suction cups, or adhesives.

[0040] According to another aspect, a binder jetting additive manufacturing and de-dusting method is provided for the system disclosed above. The method comprises:

[0041] - Insert the removable container into the build chamber,

[0042] - manufacturing at least one green part in the removable container by depositing powder layers one by one and spraying a binder while translating the bottom wall downwardly along a vertical axis,

[0043] - remove the removable container from the build chamber,

[0044] - Opening the first wall of the through hole.

[0045] The powder can flow out through the perforated first wall.

[0046] Preferably, the step of opening the perforated first wall may comprise detaching the third wall from the perforated first wall.

[0047] The method of the present invention may comprise an additional step of removing excess powder.

[0048] This manufacturing process is carried out using a binder jet additive manufacturing method. Green parts produced using this method are fragile due to the lack of powder fusion. Against this backdrop, the method of the present invention offers significant advantages, simplifying the powder removal process while reducing the risk of deformation and breakage of the green parts. Furthermore, the method of the present invention can reduce the time and costs associated with powder removal. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] Additional features, details, and advantages will become apparent from the following detailed description and analysis of the accompanying drawings, in which:

[0050] Figure 1 A and 1B:

[0051] [ Figure 1 A] and [ Figure 1 B] Schematic representation of a partial cross-sectional view of a conventional binder jetting additive manufacturing machine, respectively in two manufacturing configurations.

[0052] Figure 2 A, 2B and 2C:

[0053] [ Figure 2 A]、[ Figure 2 B] and [ Figure 2 C] schematically illustrate a partial cross-sectional view of a binder jetting additive manufacturing system according to an embodiment of the present invention, in two manufacturing configurations and a de-powdering configuration, respectively.

[0054] Figure 3 :

[0055] [ Figure 3 ] schematically illustrates an example of a perforated first wall according to an embodiment.

[0056] Figure 4 :

[0057] [ Figure 4 ] schematically illustrates another example of a perforated first wall according to an embodiment.

[0058] Figure 5 A, 5B and 5C:

[0059] [ Figure 5 A]、[ Figure 5 B] and [ Figure 5 C] schematically illustrate partial cross-sectional views of a binder jetting additive manufacturing system according to another embodiment of the present invention, in two manufacturing configurations and a de-powdering configuration, respectively. DETAILED DESCRIPTION

[0060] Reference Figure 2 A, 2B and 2C schematically show partial cross-sectional views of a first example of an additive manufacturing system 1 according to the present invention, at two moments in the manufacturing configuration ( Figure 2 A and 2B) and de-powdering configuration ( Figure 2 C), and Figure 5 A, 5B and 5C, which schematically show partial cross-sectional views of a second example of an additive manufacturing system 1 according to the present invention, at two moments in the manufacturing configuration ( Figure 5 A and 5B) and de-powdering configuration ( Figure 5 C) The system 1 is suitable for implementing a binder jetting additive manufacturing method. Preferably, such a system 1 can be used for producing parts in the aerospace sector.

[0061] The manufacturing configuration involves a phase of forming at least one component 6 within a volume of powder 7 , whereas the de-powdering configuration aims at releasing the at least one component 6 from the powder 7 .

[0062] The system comprises a build chamber 2 extending along a vertical axis Z, and a removable container 10 which can be inserted into the build chamber 2 in a manufacturing configuration and removed from the build chamber 2 in a de-powdering configuration. The vertical axis Z corresponds in particular to the manufacturing direction.

[0063] Removable container 10 includes a side wall 20 extending along a vertical axis Z and a bottom wall 30 movable within side wall 20 along vertical axis Z. Side wall 20 can be placed against the inner surface of build chamber 2. Bottom wall 30 can be driven along vertical axis Z by a removable removal member 3 mounted thereon. Removal member 3 can be, in particular, a piston, mounted on bottom wall 30, for example, via a thread and a nut. The piston can be provided with a nut while the bottom wall is threaded, or vice versa.

[0064] In the manufacturing configuration, the removable container 10 can be fixed to the build chamber 2 and / or the frame of the additive manufacturing system 1, and the fixing method can be mechanical fixing, suction cup fixing or adhesive fixing.

[0065] In a manufacturing configuration, the method comprises the following steps: depositing a layer of powder 7 on a bottom wall 30 within a build plane, and translating the bottom wall 30 downward along a vertical axis Z to deposit the next layer of powder. Prior to depositing the next layer of powder, a binder is optionally sprayed onto the powder bed to form a portion of a green part. Note that the build plane is substantially perpendicular to the vertical axis Z. These steps are repeated sequentially to form the at least one green part 6 layer by layer. Figure 2 A and 2B specifically show two consecutive moments in the manufacture of a part in the first example system 1. Similarly, Figure 5 5A and 5B in particular show two successive moments in the production of a green part in a second exemplary system 1 . Figure 2 B and 5B correspond in particular to the end of the production of the green part in the building chamber 2 .

[0066] Furthermore, the bottom wall 30 comprises a perforated first wall 31 having first orifices 33 which are closed in the manufacturing configuration and open in the de-powdering configuration. "Closed" is understood to mean that the powder flow cannot pass through the orifices, and "open" is understood to mean that the powder flow can freely pass through the orifices.

[0067] Thus, in the manufacturing configuration, the removable container 10 is advantageously housed in the building chamber 2 with the first orifice 33 of the perforated first wall 31 in a closed state (see FIG. Figure 2 A, 2B, 5A and 5B). In the powder removal configuration, such as Figure 2 As shown in Figures C and 5C, the removable container 10 can be removed from the building chamber 2, for example, to a powder removal area, whereupon the first opening 33 of the perforated first wall 31 is opened, allowing powder to flow out through the first opening 33 ( Figure 2 The dotted arrows in C and 5C indicate the powder flow direction. The perforated first wall 31 performs a screening function, retaining the parts 6 and allowing the powder 7 to flow out of the removable container 10 by gravity.

[0068] Such a system facilitates and improves the de-powdering of green parts manufactured by layer-by-layer powder deposition and binder jetting. In fact, the removable container allows easy removal from the build chamber and transfer to a de-powdering area, i.e. a block formed of powder in which at least one green part is embedded. Such a removable container can also be easily used with existing additive manufacturing machines. In the de-powdering area, opening the first orifice of the perforated first wall facilitates the discharge of powder through the bottom wall while reducing the risk of deformation or even breakage of at least one green part. The removable container also allows the production of smaller and / or lighter parts. In addition, the removable container according to the present invention is advantageously compatible with de-powdering techniques involving immersion in a liquid bath, blowing air or mechanical vibration. In addition, the removable container according to the present invention allows limiting the user's exposure to powder, for example when handling an additive manufacturing system.

[0069] The bottom wall 30 may advantageously include a third wall that is removably secured to the perforated first wall 31 and, when secured thereto, abuts against the perforated first wall 31 to close the first opening 33 of the perforated first wall 31. In particular, the third wall may abut against the perforated first wall 31 from the outside. The outside should be understood as the side opposite to the inside of the removable container. This feature allows the first opening 33 of the perforated first wall 31 to be easily opened by removing the third wall from the perforated first wall 31.

[0070] The third wall may have a plate-like shape.

[0071] The third wall may be substantially solid. Solid is understood to mean that the third wall does not contain orifices that allow powder to pass through.

[0072] In particular, a perforated first wall 31 may be interposed along the vertical axis Z between the volume receiving the powder and the third wall.

[0073] The third wall is movable relative to the perforated first wall 31. For example, the third wall and the perforated first wall 31 may be slidably connected, for example along an axis substantially perpendicular to the vertical axis Z. The third wall may be detachable from the perforated first wall 31 by sliding along the axis.

[0074] The third wall and the perforated first wall 31 may be fixed by screws, such as quarter-turn screws.

[0075] Preferably, the third wall may include first protrusions for fitting into the first apertures 33 to close the first apertures 33 of the perforated first wall 31. In other words, the first protrusions of the third wall may fit into the first apertures 33 of the perforated first wall 31. The first protrusions extend in particular along the vertical axis Z direction.

[0076] The third wall and the perforated first wall 31 together may form a manufacturing support surface 35 facing the interior of the removable container 10. The manufacturing support surface 35 is preferably planar.

[0077] The bottom wall 30 preferably includes a build plate 32. The build plate 32 should be understood as a plate that provides mechanical support for the mass of powder and part being formed. The build plate 32 can also be used to drive the bottom wall 30 along the vertical axis Z during the manufacturing process.

[0078] The third wall may specifically include a build plate 32. In particular, build plate 32 may form the third wall. When build plate 32 is secured to perforated first wall 31, it may abut against perforated first wall 31 to close first aperture 33 of perforated first wall 31. Since binder jetting additive manufacturing machines typically include a build plate, this feature allows the use of such a build plate to provide mechanical support for the assembly formed from the powder and green part, and to close the first aperture of the perforated first wall.

[0079] Build plate 32 may include a first protrusion 34 for fitting into first aperture 33 to close first aperture 33 perforating first wall 31 .

[0080] Alternatively, a third wall may be inserted between perforated first wall 31 and build plate 32 (not shown). The third wall may be placed on the build plate and, in particular, removably secured thereto. In this way, the third wall may advantageously close the first opening of the perforated first wall, while the build plate provides mechanical support for the assembly formed of the powder and the at least one green part.

[0081] Figure 3 and 4 The perforated first wall 31 is schematically shown. The maximum dimension d of the first aperture 33 in the perforated first wall 31 is preferably less than the minimum dimension of the at least one component manufactured in the removable container 10, preferably less than 50%. The first aperture 33 in the perforated first wall 31 can be, for example, circular, oval, or polygonal, such as a quadrilateral. These shapes are not limiting. Furthermore, the first aperture 33 in the perforated first wall 31 can have a regular pattern or a varying pattern.

[0082] refer to Figure 2 A, 2B and 2C, the side wall 20 may be formed as a whole.

[0083] refer to Figure 5 A, 5B, and 5C, the side wall 20 may include a perforated second wall 21 having second openings 22, which are configured to be closed in the manufacturing configuration and open in the de-dusting configuration. This technical feature allows the de-dusting operation to be performed through the side wall 20 of the removable container 10 in addition to the bottom wall 30.

[0084] Where appropriate, the side wall 20 may be formed from a plurality of perforated second walls 21 .

[0085] The perforation pattern of the perforated second wall 21 may be the same as or different from the perforation pattern of the perforated first wall 31 .

[0086] The maximum dimension of the second opening 22 of the perforated second wall 21 is preferably less than the minimum dimension of the at least one part manufactured in the removable container 10, preferably less than 50%. The second opening 22 of the perforated second wall 21 can be circular, oval, or polygonal, such as a quadrilateral. In addition, the second opening 22 of the perforated second wall 21 can have a regular pattern or a varying pattern.

[0087] The side wall 20 may include a fourth wall 23 that is detachably fixed to the perforated second wall 21 to close the second orifice 22 in the manufacturing configuration and to open the second orifice 22 in the de-dusting configuration.

[0088] The fourth wall 23 can be detachably abutted against the perforated second wall 21 from the outside. It should be noted that the outside should be understood as the side opposite to the inside of the detachable container.

[0089] Furthermore, the fourth wall 23 may comprise second protrusions 24 for cooperating with the second openings 22 to close the second openings 22 of the perforated second wall 21. In particular, the fourth wall 23 and the perforated second wall 21 may form an inner periphery facing the interior of the detachable container, the inner periphery being plane.

[0090] The fourth wall 23 is movable relative to the perforated first wall 31. For example, the fourth wall 23 and the perforated second wall 21 may be slidably connected, for example, along a vertical axis Z. The fourth wall 23 can thus be removed from the perforated second wall 21 by sliding along the vertical axis Z.

[0091] The second orifice 22 may be arranged in a lower portion of the perforated second wall 21 along the vertical axis Z. The lower portion of the perforated second wall 21 may extend from the lower end of the perforated second wall 21 to a height less than 75%, preferably 50%, of the side wall height.

[0092] The side wall 20 may comprise means 25 for fixing the bottom wall 30. Thus, the bottom wall 30 may be held by the side wall 20 during transfer of the removable container to the de-powdering area.

[0093] The sidewall 20 may include a shoulder at its lower end, against which the bottom wall 30 is intended to rest. This feature allows the vertical position of the bottom wall 30 to be maintained. In particular, the perforated first wall 31 may rest against this shoulder. Thus, during the de-dusting process, the perforated first wall 31 may be held by the sidewall 20.

[0094] The system according to the invention may advantageously comprise sealing means 40 for sealing the upper opening of the removable container 10 .

[0095] For example, the sealing means 40 may comprise a lid 41 intended to rest on the upper periphery 26 of the removable container 10. The lid 41 may be fixed to the removable container 10 by means of clamping means 42, for example.

[0096] The sealing device can be installed before the removable container is transferred to the de-powdering area. Thus, the removable container remains covered during transfer from the build chamber to the de-powdering area. This can limit or even prevent the user from inhaling loose powder.

[0097] The seal can remain installed or be removed during the de-powdering process.

[0098] According to another aspect, a binder jetting additive manufacturing and de-dusting method is provided for the system 1 disclosed above. The method comprises:

[0099] - inserting the removable container 10 into the building chamber 2,

[0100] - manufacturing at least one green part by layer-by-layer deposition of powder and binder jetting inside the removable container 10 while translating the bottom wall 30 downwards along the vertical axis Z,

[0101] - removing the removable container 10 from the building chamber 2,

[0102] - Opening the perforated first wall 31 .

[0103] The powder is thereby enabled to flow out through the perforated first wall 31 .

[0104] Preferably, the step of opening the perforated first wall 31 may comprise detaching the third wall from the perforated first wall 31 .

[0105] The method may comprise an additional step of removing excess powder after opening the perforated first wall 31 .

[0106] The manufacturing process utilizes binder jetting additive manufacturing. Parts manufactured using this method are fragile due to the lack of fusion and are therefore susceptible to breakage. Against this backdrop, the method presented in this paper offers significant advantages, simplifying the powder removal process while reducing the risk of potential part deformation and breakage. Furthermore, the method can reduce powder removal time and associated costs.

[0107] More specifically, the binder jetting additive manufacturing method sequentially involves depositing a layer of powder on a base wall, followed by selectively spraying a liquid binder through a nozzle to solidify the part cross-section on the build plane. The base wall then translates downward along the vertical axis Z to allow the next layer of powder to be deposited. These steps are repeated layer by layer to form at least one part, known as a green part. The green part is then degreased to remove most of the binder. The degreased green part undergoes a heat treatment to ensure part bonding and material densification, such as during sintering.

Claims

1. A binder jetting additive manufacturing system (1) comprising a build chamber (2) extending along a vertical axis (Z) and a removable container (10) capable of being inserted into the build chamber (2) in a manufacturing configuration and removed from the build chamber (2) in a de-powdering configuration, the removable container (10) comprising a side wall (20) extending along the vertical axis (Z) and a bottom wall (30) movable within the side wall (20) along the vertical axis (Z), the bottom wall (30) comprising a perforated first wall (31) having a first orifice (33), the first orifice (33) being closed in the manufacturing configuration and open in the de-powdering configuration.

2. The system (1) according to claim 1, characterized in that The bottom wall (30) includes a building plate (32) detachably fixed to the perforated first wall (31), and when the building plate (32) is fixed to the perforated first wall (31), the building plate (32) abuts against the perforated first wall (31) to close the first orifice (33) of the perforated first wall (31).

3. The system (1) according to claim 2, characterized in that The building plate (32) includes a first protrusion (34) for cooperating with the first aperture to close the first aperture (33) of the perforated first wall (31).

4. The system (1) according to any one of claims 1 to 3, characterized in that The side wall (20) comprises a perforated second wall (21) having a second orifice (22) which is closed in the manufacturing configuration and opened in the de-dusting configuration.

5. The system (1) according to claim 4, characterized in that The side wall (20) includes a fourth wall (23) detachably fixed to the perforated second wall (21) to close the second orifice (22) in the manufacturing configuration and to open the second orifice (22) in the de-dusting configuration.

6. The system (1) according to claim 5, characterized in that The fourth wall (23) is detachably abutted against the outer side of the perforated second wall (21) and comprises a second protrusion (24) for cooperating with the second aperture to close the second aperture (22) of the perforated second wall (21).

7. System (1) according to any one of claims 4 to 6, characterized in that The second orifice (22) is arranged along the vertical axis (Z) in the lower part of the perforated second wall (21).

8. System (1) according to any one of claims 1 to 7, characterized in that The side wall (20) may include means (25) for securing the bottom wall (30).

9. System (1) according to any one of claims 1 to 8, characterized in that The maximum dimension (d) of the first orifice (33) is preferably less than 50% of the minimum dimension of the component to be manufactured in the removable container (10).

10. System (1) according to any one of claims 1 to 9, comprising sealing means (40) for sealing the upper opening of the removable container (10).

11. System (1) according to any one of claims 1 to 10, characterized in that The bottom wall (30) is driven along a vertical axis (Z) by a detachable removal member (3) mounted on the bottom wall (30).

12. A method for binder jetting additive manufacturing and powder removal for the system (1) according to any one of claims 1 to 11, the method comprising: - inserting the removable container (10) into the building chamber (2), - manufacturing at least one component inside the removable container (10) by depositing powder layer by layer and optionally spraying a binder while translating the bottom wall (30) downwards along the vertical axis (Z), - removing the removable container (10) from the building chamber (2), - Opening the perforated first wall (31).

Images