WO2022152335A1 - Build plate for additive manufacturing apparatus having a system of outlets of canals passing through the build plate and designed to transfer gas above the deposition surface - Google Patents

Build plate for additive manufacturing apparatus having a system of outlets of canals passing through the build plate and designed to transfer gas above the deposition surface Download PDF

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Publication number
WO2022152335A1
WO2022152335A1 PCT/CZ2021/050093 CZ2021050093W WO2022152335A1 WO 2022152335 A1 WO2022152335 A1 WO 2022152335A1 CZ 2021050093 W CZ2021050093 W CZ 2021050093W WO 2022152335 A1 WO2022152335 A1 WO 2022152335A1
Authority
WO
WIPO (PCT)
Prior art keywords
build plate
gas
deposition surface
canals
additive manufacturing
Prior art date
Application number
PCT/CZ2021/050093
Other languages
French (fr)
Other versions
WO2022152335A4 (en
Inventor
Jan Džugan
Jaroslav Vavřík
Michal Brázda
Miroslav URBÁNEK
Josef Hodek
Original Assignee
Comtes Fht A.S.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Comtes Fht A.S. filed Critical Comtes Fht A.S.
Priority to PCT/CZ2021/050093 priority Critical patent/WO2022152335A1/en
Publication of WO2022152335A1 publication Critical patent/WO2022152335A1/en
Publication of WO2022152335A4 publication Critical patent/WO2022152335A4/en

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/30—Platforms or substrates
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/20—Direct sintering or melting
    • B22F10/25—Direct deposition of metal particles, e.g. direct metal deposition [DMD] or laser engineered net shaping [LENS]
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F10/00—Additive manufacturing of workpieces or articles from metallic powder
    • B22F10/30—Process control
    • B22F10/32—Process control of the atmosphere, e.g. composition or pressure in a building chamber
    • B22F10/322—Process control of the atmosphere, e.g. composition or pressure in a building chamber of the gas flow, e.g. rate or direction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F12/00—Apparatus or devices specially adapted for additive manufacturing; Auxiliary means for additive manufacturing; Combinations of additive manufacturing apparatus or devices with other processing apparatus or devices
    • B22F12/90—Means for process control, e.g. cameras or sensors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F2999/00—Aspects linked to processes or compositions used in powder metallurgy
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

Definitions

  • BUILD PLATE FOR ADDITIVE MANUFACTURING APPARATUS HAVING A SYSTEM OF OUTLETS OF CANALS PASSING THROUGH THE BUILD PLATE AND DESIGNED TO TRANSFER GAS ABOVE THE DEPOSITION SURFACE
  • the present invention relates generally to additive manufacturing apparatuses and specifically to their components.
  • the source material e.g., a powder or thread
  • the deposition head of the apparatus is at least partly melted (e.g., via resistance heating, a laser beam etc.) and placed on the build plate, where the target product is gradually formed.
  • the source material in the form of a powder is directed from the head to the center of the laser beam, where it is melted.
  • the movement of the deposition head creates weld deposits, which then form the manufactured product on the build plate.
  • the deposition head also contains an outlet of the canal for the supply of a protective inert gas which partly prevents the oxidation of the melted material. However, partial surface oxidation of reactive materials, such as titan, still takes place.
  • the presented invention is designed to provide an apparatus which will create a stronger protective atmosphere, one that is necessary to process reactive materials during 3D printing.
  • the invention relates to a design of a build plate (sometimes referred to as platform) designed for the additive manufacturing of products.
  • the top side of the build plate is equipped with a deposition surface.
  • the deposition surface is the working interface (area) of the build plate, where the material deposition takes place.
  • the deposition surface is located either on a part of or comprises the whole upper side (surface) of the build plate.
  • the deposition surface is used to temporarily place the material of the manufactured product. After it is completed, the product is removed from the deposition surface and the manufacturing of the next product can commence.
  • the build plate is also equipped with a set of assembly elements as per the state of the art for anchoring technology used in additive manufacturing apparatus. Typically, this may consist of threaded holes, pins etc.
  • the assembly elements are part of the state of the art and their specific design is based on the type of apparatus they are intended for.
  • the deposition surface is equipped with a set of outlets of canals that pass through the build plate; these are used to bring the gas above the deposition surface.
  • the gas used here is usually inert, and its aim is to prevent undesirable changes (primarily oxidation) on the surface of the manufactured product.
  • Canals may be created for instance by drilling, or the whole build plate with canals can be created by casting or via additive manufacturing. Canals may be direct, separated from each other, connect to each other or split off, twisted in various ways etc.
  • An advantageous design may be to have a pre-defined zone for the placement of material of the manufactured product on the deposition surface.
  • the outlets of the canals may in this case be arranged outside of this defined zone of the deposition surface.
  • Another design may place the outlet of the canals on that part of the deposition surface, where the melted material is placed.
  • the advantage here is that in some cases, this will create a higher-quality gas cover. This may improve the protection of the surface of the melted material against oxidation.
  • One advantageous design may be to use a non-normal orientation for the longitudinal axis of the canals at the outlet area with respect to the deposition surface.
  • the gas can exit the outlet non-perpendicularly with respect to the deposition surface. This allows the controlled transport of gas directly to the specific area on the surface of the manufactured product. In turn, this leads to more efficient protection of this area of the manufactured product against oxidation.
  • Another design may have the build plate contain a whole-porous permeable material, such as pumice (volcanic glass).
  • a whole-porous permeable material such as pumice (volcanic glass).
  • pumice volcanic glass
  • An advantage here is that it is not necessary to make special canals in the build plate.
  • the whole-porous permeable material will make the build plate’s production easier, since it itself already has the required properties (resistance to additive manufacturing and permeability).
  • the whole-porous permeable material’s volume includes a system of variously connected canals, which lead to outlets on its surface.
  • the build plate can either be made only of a whole-porous permeable material, or this material may be used for a part of the build plate.
  • One notable case would be to create the middle part of the build plate using whole-porous permeable material, and have this middle part anchored to a non-porous outer part of the build plate. In this way, the gas flows from the bottom part of the build plate through the whole-porous permeable material to the deposition surface, whereas its spread into the surroundings is inhibited by the non-porous outside part of the build plate.
  • the build plate may be equipped with an enclosed airtight chamber.
  • the chamber includes a gas intake that can be connected to the gas source and is connected to the canals.
  • the chamber is filled with a pressurized inert gas from a source of the gas, and the overpressure pushes it out of the canal outlets.
  • the shape and size of the chamber is irrelevant. The only thing that matters is to have it as a part of the build plate. Its size and shape may significantly exceed the size of the canals, or it may have the form of a central canal that branches out to individual canals with outlets.
  • One of the walls of the chamber (usually the upper one) may consist of a whole-porous permeable material.
  • the gas intake can thus be, for instance, connected to an external pressurized tank using a hose.
  • the apparatus contains other standard elements as per the state of the art, such as, e.g., a deposition head, servos, frame. As a consequence, this design of the build plate is especially well suited for the current additive manufacturing apparatus.
  • the additive manufacturing apparatus may place the build plate with canals as one of the walls of an enclosed space inside an apparatus.
  • the build plate is sealed so as to prevent the gas from flowing beside the build plate (notably, to prevent the gas from flowing beside the build plate from the enclosed space from the lower side of the build plate to its upper side).
  • One of the walls of the enclosed space in the apparatus may also contain a whole-porous permeable material.
  • the canals are connected to the enclosed space.
  • the enclosed space contains an outlet of the gas.
  • This design requires an adjustment to the apparatus structure, which together with the build plate must allow for the creation of an enclosed space containing the gas outlet.
  • the build plate need not be equipped with its own enclosed airtight chamber with a gas intake.
  • This design of the apparatus can thus be advantageously applied especially when several different build plates are required, each with their own arrangements of canals and/or their outlets. It is advantageous to connect the build plate in the apparatus using a detachable connection, meaning that it can be removed and reattached as necessary. This allows to easily exchange relatively simpler and cheaper build plates compared with the build plate containing the chamber.
  • the deposition head may be equipped with a gas quantity sensor at the location of the melted material.
  • This sensor can be connected to a computational (control) unit, which is equipped with an action element for controlling the flow of the gas from the gas source (e.g., via an electronically controlled flow valve). If the sensor detects that the gas concentration is too low at the location of the melted material, the control unit identifies the need to increase the gas flow. At the command of the control unit, the action element opens up more which in turn increases the flow of the gas from the gas source and increases its concentration at the location of the melted material.
  • the control unit identifies the possibility to decrease the gas flow.
  • the action element will partially close which in turn reduces the gas flow. This leads to savings of gas, which in turn improves the environmental and economical aspects of the operation of the described apparatus.
  • the above-described build plate and the apparatus using this build plate can advantageously be used for the manufacturing of products made of reactive metals using DED (Direct Energy Deposition) and/or LMD (Laser Metal Deposition) technology.
  • DED Direct Energy Deposition
  • LMD Laser Metal Deposition
  • a gas that is heavier than air e.g., argon
  • the inflow of the gas from below leads to the creation of a continuously supplied gas bubble on the deposition surface.
  • the deposition head moves inside the gas bubble and manufactures the product.
  • gas dissipation into the environment occurs only to a lesser extent compared to the transport of gas from the deposition head as per the state of the art.
  • FIG. 1 a cross-section through a build plate with an enclosed airtight chamber with a gas intake
  • FIG. 2 cross section through the apparatus for additive manufacturing with a build plate as per Fig. 1;
  • FIG. 3 cross section through a build plate without an enclosed airtight chamber
  • Fig. 4 cross section through the apparatus for additive manufacturing with an enclosed space and a build plate as per Fig. 3;
  • Fig. 5 cross section through a build plate with an enclosed airtight chamber with a gas intake and with whole-porous permeable material;
  • Fig. 6 cross section through the apparatus for additive manufacturing with an enclosed space and a build plate containing whole-porous permeable material.
  • the build plate for an additive manufacturing apparatus for building products 13 is equipped, on its top side, with a deposition surface 3 for the temporary placement of the manufactured product 13.
  • the build plate is also equipped with a set of assembly elements 5 for anchoring technology used in additive manufacturing apparatus.
  • the deposition surface 3 is equipped with a set of outlets 1 of canals 2 that pass through the build plate; these are used to bring the gas above the deposition surface 3.
  • the deposition surface 3 contains a pre-defined zone 4 for the placement of material required for the manufactured product 13.
  • the outlets 1 of the canals 2 are arranged outside of this defined zone 4 of the deposition surface 3.
  • the longitudinal axis of some canals 2 at the outlet 1 area does not have a normal orientation with respect to the deposition surface 3.
  • the build plate is equipped with an enclosed airtight chamber 6 which includes a gas intake 7 and a connection to the canals 2.
  • the build plate is part of an apparatus for additive manufacturing, which it is attached to using assembly elements 5.
  • the gas intake 7 is connected to the gas source (not shown) using a hose 14.
  • the deposition head 9 is equipped with a gas quantity sensor 10.
  • the sensor 10 is connected to the control unit 11 which is equipped with an action element 12 for controlling the gas flow into the canals 2 from the gas source.
  • the build plate for an additive manufacturing apparatus for building products 13 is equipped, on its top side, with a deposition surface 3 for the temporary placement of the manufactured product 13.
  • the build plate is also equipped with a set of assembly elements 5 for anchoring technology used in additive manufacturing apparatus.
  • the deposition surface 3 is equipped with a set of outlets 1 of canals 2 that pass through the build plate; these are used to bring the gas above the deposition surface 3.
  • the outlets 1 of the canals 2 are evenly distributed along the deposition surface 3.
  • the longitudinal axis of all canals 2 at the outlet 1 area has a normal orientation with respect to the deposition surface 3.
  • the build plate is part of an apparatus for additive manufacturing, which it is attached to using assembly elements 5.
  • the build plate forms one of the walls of the enclosed space 8 in the apparatus.
  • the build plate is sealed in order to prevent the gas from flowing beside the build plate from the enclosed space 8 from the lower side of the build plate to its upper side.
  • the enclosed space 8 contains an outlet from the gas source (not depicted), connected via a hose 14.
  • the deposition head 9 is equipped with a gas quantity sensor 10.
  • the sensor 10 is connected to the control unit 11 which is equipped with an action element 12 for controlling the gas flow into the canals 2 from the gas source.

Abstract

A build plate for an additive manufacturing apparatus for building products whose upper side is equipped with a deposition surface (3) for the temporary placement of the manufactured product (13) and also equipped with a set of assembly elements (5) to attach it to the additive manufacturing apparatus characterized by that the deposition surface (3) is equipped with a system of outlets (1) of canals (2) passing through the build plate and designed to transfer gas above the deposition surface (3).

Description

BUILD PLATE FOR ADDITIVE MANUFACTURING APPARATUS HAVING A SYSTEM OF OUTLETS OF CANALS PASSING THROUGH THE BUILD PLATE AND DESIGNED TO TRANSFER GAS ABOVE THE DEPOSITION SURFACE
Technical Field
The present invention relates generally to additive manufacturing apparatuses and specifically to their components.
State of the Art
The state of the art of additive manufacturing (3D printing) is well understood. When using this technology, the source material (e.g., a powder or thread) in the deposition head of the apparatus is at least partly melted (e.g., via resistance heating, a laser beam etc.) and placed on the build plate, where the target product is gradually formed. In case of the manufacturing of products made of reactive materials (notably metals), it becomes necessary to protect the surface of the melted material from undesirable impacts of the surrounding atmosphere (notably oxidation). For instance, during additive manufacturing using so-called DED (Direct Energy Deposition) technology, the source material in the form of a powder is directed from the head to the center of the laser beam, where it is melted. The movement of the deposition head creates weld deposits, which then form the manufactured product on the build plate. The deposition head also contains an outlet of the canal for the supply of a protective inert gas which partly prevents the oxidation of the melted material. However, partial surface oxidation of reactive materials, such as titan, still takes place.
In view of the above, the presented invention is designed to provide an apparatus which will create a stronger protective atmosphere, one that is necessary to process reactive materials during 3D printing.
Disclosure of Invention
The invention relates to a design of a build plate (sometimes referred to as platform) designed for the additive manufacturing of products. The top side of the build plate is equipped with a deposition surface. The deposition surface is the working interface (area) of the build plate, where the material deposition takes place. The deposition surface is located either on a part of or comprises the whole upper side (surface) of the build plate. The deposition surface is used to temporarily place the material of the manufactured product. After it is completed, the product is removed from the deposition surface and the manufacturing of the next product can commence. The build plate is also equipped with a set of assembly elements as per the state of the art for anchoring technology used in additive manufacturing apparatus. Typically, this may consist of threaded holes, pins etc. The assembly elements are part of the state of the art and their specific design is based on the type of apparatus they are intended for. The deposition surface is equipped with a set of outlets of canals that pass through the build plate; these are used to bring the gas above the deposition surface. The gas used here is usually inert, and its aim is to prevent undesirable changes (primarily oxidation) on the surface of the manufactured product. Canals may be created for instance by drilling, or the whole build plate with canals can be created by casting or via additive manufacturing. Canals may be direct, separated from each other, connect to each other or split off, twisted in various ways etc.
An advantageous design may be to have a pre-defined zone for the placement of material of the manufactured product on the deposition surface. The outlets of the canals may in this case be arranged outside of this defined zone of the deposition surface. The advantage of this design is that it prevents melted material from entering into the canals. In turn, this prevents the canals from being clogged and damage to the build plate.
Another design may place the outlet of the canals on that part of the deposition surface, where the melted material is placed. The advantage here is that in some cases, this will create a higher-quality gas cover. This may improve the protection of the surface of the melted material against oxidation.
One advantageous design may be to use a non-normal orientation for the longitudinal axis of the canals at the outlet area with respect to the deposition surface. In other words, the gas can exit the outlet non-perpendicularly with respect to the deposition surface. This allows the controlled transport of gas directly to the specific area on the surface of the manufactured product. In turn, this leads to more efficient protection of this area of the manufactured product against oxidation.
Another design may have the build plate contain a whole-porous permeable material, such as pumice (volcanic glass). An advantage here is that it is not necessary to make special canals in the build plate. The whole-porous permeable material will make the build plate’s production easier, since it itself already has the required properties (resistance to additive manufacturing and permeability). The whole-porous permeable material’s volume includes a system of variously connected canals, which lead to outlets on its surface. The build plate can either be made only of a whole-porous permeable material, or this material may be used for a part of the build plate. One notable case would be to create the middle part of the build plate using whole-porous permeable material, and have this middle part anchored to a non-porous outer part of the build plate. In this way, the gas flows from the bottom part of the build plate through the whole-porous permeable material to the deposition surface, whereas its spread into the surroundings is inhibited by the non-porous outside part of the build plate.
In order to easily connect the canals to a gas source, the build plate may be equipped with an enclosed airtight chamber. The chamber includes a gas intake that can be connected to the gas source and is connected to the canals. For additive manufacturing processes, the chamber is filled with a pressurized inert gas from a source of the gas, and the overpressure pushes it out of the canal outlets. The shape and size of the chamber is irrelevant. The only thing that matters is to have it as a part of the build plate. Its size and shape may significantly exceed the size of the canals, or it may have the form of a central canal that branches out to individual canals with outlets. One of the walls of the chamber (usually the upper one) may consist of a whole-porous permeable material. Having a single source of the gas for the build plate makes it easier to anchor such a build plate into standard additive manufacturing apparatus, without requiring adjustments. The gas intake can thus be, for instance, connected to an external pressurized tank using a hose. Aside from the innovative build plate described above, the apparatus contains other standard elements as per the state of the art, such as, e.g., a deposition head, servos, frame. As a consequence, this design of the build plate is especially well suited for the current additive manufacturing apparatus.
Other designs for the additive manufacturing apparatus may place the build plate with canals as one of the walls of an enclosed space inside an apparatus. In this case, the build plate is sealed so as to prevent the gas from flowing beside the build plate (notably, to prevent the gas from flowing beside the build plate from the enclosed space from the lower side of the build plate to its upper side). One of the walls of the enclosed space in the apparatus may also contain a whole-porous permeable material. The canals are connected to the enclosed space. The enclosed space contains an outlet of the gas. This design requires an adjustment to the apparatus structure, which together with the build plate must allow for the creation of an enclosed space containing the gas outlet. On the other hand, the build plate need not be equipped with its own enclosed airtight chamber with a gas intake. This makes the build plate easier and cheaper to produce. This design of the apparatus can thus be advantageously applied especially when several different build plates are required, each with their own arrangements of canals and/or their outlets. It is advantageous to connect the build plate in the apparatus using a detachable connection, meaning that it can be removed and reattached as necessary. This allows to easily exchange relatively simpler and cheaper build plates compared with the build plate containing the chamber.
In order to create a high-quality protective atmosphere, the deposition head may be equipped with a gas quantity sensor at the location of the melted material. This sensor can be connected to a computational (control) unit, which is equipped with an action element for controlling the flow of the gas from the gas source (e.g., via an electronically controlled flow valve). If the sensor detects that the gas concentration is too low at the location of the melted material, the control unit identifies the need to increase the gas flow. At the command of the control unit, the action element opens up more which in turn increases the flow of the gas from the gas source and increases its concentration at the location of the melted material. On the other hand, if the sensor detects that the gas concentration is too high at the location of the melted material, the control unit identifies the possibility to decrease the gas flow. At the command of the control unit, the action element will partially close which in turn reduces the gas flow. This leads to savings of gas, which in turn improves the environmental and economical aspects of the operation of the described apparatus.
The above-described build plate and the apparatus using this build plate can advantageously be used for the manufacturing of products made of reactive metals using DED (Direct Energy Deposition) and/or LMD (Laser Metal Deposition) technology. When using a gas that is heavier than air (e.g., argon), the inflow of the gas from below (through the build plate) leads to the creation of a continuously supplied gas bubble on the deposition surface. The deposition head moves inside the gas bubble and manufactures the product. At the same time, gas dissipation into the environment occurs only to a lesser extent compared to the transport of gas from the deposition head as per the state of the art.
Brief Description of Drawings
An example embodiment of the proposed solution is described below, referencing drawings which include Fig. 1 - a cross-section through a build plate with an enclosed airtight chamber with a gas intake; Fig. 2 - cross section through the apparatus for additive manufacturing with a build plate as per Fig. 1;
Fig. 3 - cross section through a build plate without an enclosed airtight chamber;
Fig. 4 - cross section through the apparatus for additive manufacturing with an enclosed space and a build plate as per Fig. 3;
Fig. 5 - cross section through a build plate with an enclosed airtight chamber with a gas intake and with whole-porous permeable material;
Fig. 6 - cross section through the apparatus for additive manufacturing with an enclosed space and a build plate containing whole-porous permeable material.
Best Mode for Carrying Out the Invention
Example 1
The build plate for an additive manufacturing apparatus for building products 13 is equipped, on its top side, with a deposition surface 3 for the temporary placement of the manufactured product 13. The build plate is also equipped with a set of assembly elements 5 for anchoring technology used in additive manufacturing apparatus. The deposition surface 3 is equipped with a set of outlets 1 of canals 2 that pass through the build plate; these are used to bring the gas above the deposition surface 3. The deposition surface 3 contains a pre-defined zone 4 for the placement of material required for the manufactured product 13. The outlets 1 of the canals 2 are arranged outside of this defined zone 4 of the deposition surface 3. The longitudinal axis of some canals 2 at the outlet 1 area does not have a normal orientation with respect to the deposition surface 3. The build plate is equipped with an enclosed airtight chamber 6 which includes a gas intake 7 and a connection to the canals 2.
The build plate is part of an apparatus for additive manufacturing, which it is attached to using assembly elements 5. The gas intake 7 is connected to the gas source (not shown) using a hose 14. The deposition head 9 is equipped with a gas quantity sensor 10. The sensor 10 is connected to the control unit 11 which is equipped with an action element 12 for controlling the gas flow into the canals 2 from the gas source.
An exemplary implementation can be seen on Fig. 1 and Fig. 2. Example 2
The build plate for an additive manufacturing apparatus for building products 13 is equipped, on its top side, with a deposition surface 3 for the temporary placement of the manufactured product 13. The build plate is also equipped with a set of assembly elements 5 for anchoring technology used in additive manufacturing apparatus. The deposition surface 3 is equipped with a set of outlets 1 of canals 2 that pass through the build plate; these are used to bring the gas above the deposition surface 3. The outlets 1 of the canals 2 are evenly distributed along the deposition surface 3. The longitudinal axis of all canals 2 at the outlet 1 area has a normal orientation with respect to the deposition surface 3.
The build plate is part of an apparatus for additive manufacturing, which it is attached to using assembly elements 5. The build plate forms one of the walls of the enclosed space 8 in the apparatus. The build plate is sealed in order to prevent the gas from flowing beside the build plate from the enclosed space 8 from the lower side of the build plate to its upper side. The enclosed space 8 contains an outlet from the gas source (not depicted), connected via a hose 14.
The deposition head 9 is equipped with a gas quantity sensor 10. The sensor 10 is connected to the control unit 11 which is equipped with an action element 12 for controlling the gas flow into the canals 2 from the gas source.
An exemplary implementation can be seen on Fig. 3 and Fig. 4.
List of reference symbols
1 - canal outlet
2 - canal
3 - deposition surface
4 - zone of the deposition surface
5 - assembly element
6 - chamber
7 - gas intake
8 - enclosed space
9 - deposition head
10 - gas quantity sensor
11 - control unit
12 - action element
13 - product
14 - hose

Claims

8
Claims
1. A build plate for an additive manufacturing apparatus for building products whose upper side is equipped with a deposition surface (3) for the temporary placement of the manufactured product (13) and also equipped with a set of assembly elements (5) to attach it to the additive manufacturing apparatus characterized by that the deposition surface (3) is equipped with a system of outlets (1) of canals (2) passing through the build plate and designed to transfer gas above the deposition surface (3).
2. The build plate according to claim 1 characterized by that on the deposition surface (3) there is a pre-defined zone (4) for the placement of the material of the manufactured product (13) and the outlets (1) of the canals (2) are arranged outside of this zone (4) of the deposition surface (3).
3. The build plate according to claim 1 or 2 characterized by that the longitudinal axis of the canal (2) at the outlet (1) has a non -normal orientation with respect to the deposition surface (3).
4. The build plate according to any of the preceding claims 1 to 3 characterized by that it is equipped with an enclosed airtight chamber (6) including a gas intake (7) and connected to the canals (2).
5. An additive manufacturing apparatus characterized in that it contains a build plate according to any of the claims 1 to 3, whereas the build plate forms one of the walls of an enclosed space (8) in the apparatus and is sealed against gas leaking through the enclosed space (8) via the bottom side of the build plate towards the upper side of the build plate, whereas the enclosed space (8) contains a connection to a gas source.
6. An additive manufacturing apparatus characterized in that it contains a build plate according to claim 4, whereas the gas intake (7) is connected to a gas source.
7. The additive manufacturing apparatus according to claim 5 or 6 characterized in that the deposition head (9) is equipped with a gas quantity sensor (10) connected to a control unit 9
(11) equipped with an action element (12) for controlling the flow of gas from the gas source to canals (2).
PCT/CZ2021/050093 2021-08-25 2021-08-25 Build plate for additive manufacturing apparatus having a system of outlets of canals passing through the build plate and designed to transfer gas above the deposition surface WO2022152335A1 (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9533452B2 (en) * 2012-09-28 2017-01-03 Bundesrepublik Deutschland, Vertreten Durch Das Bundesministerium Fuer Wirtschaft Und Technologie, Dieses Vertreten Durch Den Praesidenten Der Bam, Bundesanstalt Fuer Materialforschung Und-Pruefung Method for stabilizing a powder bed by means of vacuum for additive manufacturing
EP3321003A1 (en) * 2016-11-11 2018-05-16 SLM Solutions Group AG Apparatus and method for producing a three-dimensional work piece with improved gas flow
US20190202128A1 (en) * 2017-07-20 2019-07-04 Hewlett-Packard Development Company, L.P. Build material recycling system of a three-dimensional (3d) printer
US20210001402A1 (en) * 2019-07-03 2021-01-07 Directed Metal 3D, S.L. Multi-mode laser device for metal manufacturing applications
EP3970879A1 (en) * 2020-09-17 2022-03-23 Linde GmbH System and method for additive manufacturing

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9533452B2 (en) * 2012-09-28 2017-01-03 Bundesrepublik Deutschland, Vertreten Durch Das Bundesministerium Fuer Wirtschaft Und Technologie, Dieses Vertreten Durch Den Praesidenten Der Bam, Bundesanstalt Fuer Materialforschung Und-Pruefung Method for stabilizing a powder bed by means of vacuum for additive manufacturing
EP3321003A1 (en) * 2016-11-11 2018-05-16 SLM Solutions Group AG Apparatus and method for producing a three-dimensional work piece with improved gas flow
US20190202128A1 (en) * 2017-07-20 2019-07-04 Hewlett-Packard Development Company, L.P. Build material recycling system of a three-dimensional (3d) printer
US20210001402A1 (en) * 2019-07-03 2021-01-07 Directed Metal 3D, S.L. Multi-mode laser device for metal manufacturing applications
EP3970879A1 (en) * 2020-09-17 2022-03-23 Linde GmbH System and method for additive manufacturing

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