WO2021015543A1 - Procédé d'élimination de poudre résiduelle d'imprimante 3d au moyen d'un dispositif d'élimination de poudre résiduelle - Google Patents

Procédé d'élimination de poudre résiduelle d'imprimante 3d au moyen d'un dispositif d'élimination de poudre résiduelle Download PDF

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Publication number
WO2021015543A1
WO2021015543A1 PCT/KR2020/009635 KR2020009635W WO2021015543A1 WO 2021015543 A1 WO2021015543 A1 WO 2021015543A1 KR 2020009635 W KR2020009635 W KR 2020009635W WO 2021015543 A1 WO2021015543 A1 WO 2021015543A1
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Prior art keywords
powder
residual powder
residual
concentration
chamber
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PCT/KR2020/009635
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English (en)
Korean (ko)
Inventor
강성민
이수봉
신기수
Original Assignee
주식회사 대건테크
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Publication of WO2021015543A1 publication Critical patent/WO2021015543A1/fr

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    • 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
    • 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
    • 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
    • B22F10/70—Recycling
    • B22F10/73—Recycling of powder
    • 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
    • B22F12/70—Gas flow means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/35—Cleaning
    • 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
    • B22F10/28—Powder bed fusion, e.g. selective laser melting [SLM] or electron beam melting [EBM]
    • 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

  • the present invention uses a residual powder removal device to improve ease of use by providing a residual powder removal device for removing residual powder in a 3D printer that continuously supplies metal powder having an explosion risk and molds a 3D molded product. It relates to a 3D printer residual powder removal method.
  • the present invention relates to a method for removing residual powder in a 3D printer using a residual powder removing device in which a vibration generating unit is provided at one side of the residual powder removing device to reduce the cohesive force of the residual powder so that powder can be removed quickly.
  • the present invention relates to a method for removing residual powder of a 3D printer using a residual powder removing device having a filter on one side of the residual powder removing device, and separating and collecting the filtered residual powder from the filter, thereby improving the powder recovery rate.
  • the present invention relates to a method for removing residual powder of a 3D printer using a residual powder removing device having a scattering unit and allowing the residual powder to be removed more quickly by scattering the residual powder attached to the inner wall of the chamber.
  • the present invention relates to a method for removing residual powder in a 3D printer using a residual powder removing device in which an inert gas is injected by a scattering unit to block the risk of explosion in advance.
  • 3D printers are equipment that produce real three-dimensional shapes as they are based on input two-dimensional drawings as if printing letters or pictures, and 3D printing technology is expanding to the fields of automobiles, medical care, arts, and education. It is widely used for making.
  • 3D printer can be divided into cutting type and stacking type, and most of 3D printers that are actually applied are stacked type without material loss.
  • the laminated 3D printer is a method of projecting and curing a laser so that prints are completed in a way that is laminated, and in Korean Patent No. 10-1715124, it is used for a 3D printer that uses metal powder as a molding target as shown in FIG.
  • a powder application device and a three-dimensional printer having the same are disclosed.
  • magnesium is lighter than aluminum and is widely used in aircraft parts, and when it is mixed with other components and alloyed, it has excellent high-temperature heat resistance and is a material used in aircraft engine parts.
  • Korean Patent Laid-Open No. 10-2017-0014618 discloses a collection chamber 10 in which residual powder is deposited under the build chamber 1 in which powder is sintered into a sculpture by a laser, as shown in FIG. 2, and a build chamber 1 ) To move the sintered sculpture and residual powder to the collection chamber 10 together with the platform 5, the collection chamber 30 in which the powder in the collection chamber 10 is transferred and collected, and the collection chamber (10) There is disclosed an apparatus for removing residual powder of a laser sintering type 3D printer comprising a collection blade 40 for transporting the powder in the collection chamber 30 to the collection chamber 30.
  • a laser sintering type 3D printer has disclosed a residual powder removal device comprising a suction device that sucks and collects) so that the residual powder around the sculpture W can be easily and quickly separated and removed.
  • Korean Patent Laid-Open No. 10-2018-0103334 discloses an air compressor 260 that maintains a predetermined air pressure inside the product molding chamber 210 as shown in FIG. 4, and in a state disposed on the other side of the product molding chamber 210.
  • a 3D printer powder recovery device using an air compressor and air pressure is disclosed including a powder inhaling device 270 for recovering unsintered powder particles from the inside of a product molding chamber 210.
  • the above techniques are for removing powder from a sculpture, and there is a problem in that the convenience of use is deteriorated when a sculpture is to be produced from a powder of a material different from the used powder.
  • An object of the present invention is to solve the problems of the prior art as described above, and remove residual powder from a 3D printer using a residual powder removal device that has a residual powder removal device for removing the residual powder and improves usability. It is in providing a way.
  • Another object of the present invention is to provide a method for removing residual powder in a 3D printer using a residual powder removing device in which a vibration generating unit is provided on one side of the residual powder removing device to reduce the cohesive force of the residual powder so that the powder can be removed quickly.
  • Another object of the present invention is a method for removing residual powder by a 3D printer using a residual powder removing device having a filter on one side of the residual powder removing device, and separating and collecting the filtered residual powder from the filter to improve the powder recovery rate To provide.
  • Another object of the present invention is a method for removing residual powder in a 3D printer using a residual powder removal device having a scattering unit and scattering the residual powder attached to the inner wall of the chamber so that the residual powder can be removed more quickly To provide.
  • Another object of the present invention is to provide a 3D printer residual powder removal method using a residual powder removal device in which an inert gas is injected by a scattering unit to block the risk of explosion in advance.
  • the present invention relates to a chamber for forming a printing space in which a three-dimensional molded product is formed by receiving laser irradiation from a laser irradiator inside a cabinet protecting a plurality of parts, and a concentration measuring device for measuring the concentration of metal powder scattered in the chamber.
  • a powder transfer unit for transferring metal powder inside the chamber, and forcibly dispersing the aggregated metal powder by spraying an inert gas into the chamber, and filtering the metal powder through a filter assembly to remove the remaining metal powder inside the chamber.
  • a method for removing residual powder of a 3D printer having a residual powder removing device comprising a residual powder removing device to be removed comprising: a preparation step of supplying power to the concentration meter and the residual powder removing device to prepare for removing the residual powder; And a filtering step of filtering the residual powder contained in the inert gas flowing by the residual powder removal device, and a completion step of terminating the concentration meter and the residual powder removal device.
  • the concentration meter is characterized in that the concentration of the metal powder inside the chamber is continuously measured and provided to the control panel.
  • the filtering step includes a filtering process of selectively filtering only the residual powder of the residual powder and inert gas, a concentration detection process of detecting the residual powder concentration inside the chamber, and a concentration and setting of the residual powder detected in the concentration detection process. It is characterized in that it comprises a concentration comparison process for comparing the concentration.
  • the completion step is characterized in that the concentration of the residual powder detected in the concentration sensing process is lowered to a predetermined concentration or less, and the operation of the concentration meter and the residual powder removal device is terminated.
  • a gas flow path that guides the gas forced to flow by the pump through the chamber interior, and a filter assembly installed on one side of the gas flow path to filter the residual powder contained in the gas to generate vibration It is characterized in that the agglomeration of residual powder is limited by operating the regeneration vibration generator.
  • a powder collection space is provided inside the filter assembly, and residual powder separated from the filter is collected by a vibration generator for regeneration.
  • the regeneration vibration generator regenerates the filter by increasing the aperture ratio of the filter by dropping residual powder attached to the filter.
  • the powder can be removed quickly.
  • a filter is provided on one side of the residual powder removal device, and the powder recovery rate may be improved by separating and collecting the filtered residual powder from the filter.
  • a scattering unit is provided to scatter the residual powder adhering to the inner wall of the chamber, so that the residual powder can be removed more quickly.
  • FIG. 1 is a perspective view showing the configuration of a powder application device and a 3D printer having the same for a 3D printer disclosed in Korean Patent Registration No.
  • Figure 2 is a cross-sectional view showing the configuration of the residual powder removal device of the laser sintered three-dimensional printer disclosed in Korean Patent Laid-Open No. 10-2017-0014618.
  • FIG. 3 is a cross-sectional view showing the configuration of a device for removing residual powder of a laser sintering type 3D printer disclosed in Korean Patent Application Laid-Open No. 10-2017-0014323.
  • FIG. 4 is a schematic view showing a 3D printer powder recovery device using an air compressor and pneumatic pressure in Korean Patent Laid-Open Publication No. 10-2018-0103334.
  • FIG. 5 is a cross-sectional view showing the configuration of a 3D printer equipped with a residual powder removal device according to the present invention.
  • Figure 6 is a cross-sectional view showing the operation of the 3D printer equipped with a residual powder removal device according to the present invention.
  • FIG. 7 is a cross-sectional view showing a detailed configuration of a filter assembly, which is one configuration, in a 3D printer equipped with a residual powder removal device according to the present invention.
  • FIG. 8 is a flow chart showing a 3D printer residual powder removal method using the residual powder removal device according to the present invention.
  • FIG. 9 is a flow chart showing in detail a filtering step, which is one step in the 3D printer residual powder removal method using the residual powder removal device according to the present invention.
  • '3D printer 100' having a residual powder removal device 200 according to the present invention will be described with reference to FIGS. 5 and 6.
  • FIG. 5 is a cross-sectional view showing the configuration of a 3D printer 100 equipped with a residual powder removal device 200 according to the present invention
  • FIG. 6 is a 3D 3D printer with a residual powder removal device 200 according to the present invention. A cross-sectional view showing the operation of the printer 100 is shown.
  • the 3D printer 100 is configured to store a certain amount of metal powder P and then supply it to the lower side of the laser irradiator 110 by a predetermined thickness.
  • the 3D printer 100 is operated in an inert atmosphere so that the metal powder P does not come into contact with air or water as the metal powder P, which has an explosion risk, is used as a material.
  • the 3D printer 100 has an external shape formed by a cabinet 120 in a rectangular parallelepiped shape, and a plurality of parts are built into the cabinet 120.
  • a chamber 130 is provided inside the cabinet 120.
  • the chamber 130 is configured to be sealed inside, and has a printing space 132 therein, and a laser irradiator 110 is installed above the printing space 132.
  • the remaining metal powder P is more easily scattered, and the inner edge is rounded to prevent the residual powder from agglomeration in the corner. Is formed.
  • a concentration meter 138 is provided on the inner central ceiling of the chamber 130.
  • the concentration meter 138 is a configuration for measuring the concentration of the scattered metal powder (P) inside the chamber 130, and is continuously measured when the residual powder removal device 200 is operated, so that the remaining concentration is lower than the preset concentration. It is a configuration that enables the operation of the powder removal device 200 to be stopped.
  • the residual powder removal device 200 maintains or stops the operation in conjunction with the concentration measurement value of the metal powder P measured by the concentration measuring device 138.
  • the 3D printer 100 is provided with a control panel, and the control panel performs a task of comparing the concentration of the metal powder P measured by the concentration meter 138 with a preset concentration, and the measured metal powder ( When the concentration of P) is less than or equal to the set concentration, it is preferably set to stop the operation of the residual powder removal device 200.
  • a storage unit 134 in which the metal powder P is stored, and the metal powder P stored in the storage unit 134 are stacked on the upper side of the laser irradiator 110 ) By irradiation of the laser to form a three-dimensional molded article (D) is formed, respectively.
  • the storage unit 134 and the molding unit 136 are lowered or raised in opposite directions when forming the three-dimensional molded product (D), thereby enabling the supply of the metal powder (P) and forming the three-dimensional molded product (D).
  • a powder transfer unit 140 for transferring the metal powder P is installed on the left side of the storage unit 134.
  • the powder transfer unit 140 When the storage unit 134 is raised to a predetermined height and the metal powder P is supplied to the printing space 132, the powder transfer unit 140 is spread to a uniform thickness while moving to the right side. It is a configuration that allows metal powders (P) of uniform height to be accumulated.
  • the metal powder (P) is fired by receiving laser irradiation from the laser irradiation unit 110 and recording, and the supply of the metal powder (P) of the powder transfer unit 140 and the descending of the molding unit 136 are repeated many times. Accordingly, it is possible to mold the three-dimensional molded article (D).
  • a powder collecting container 150 is provided on the right side of the molding part 136.
  • the powder collection container 150 is a place where excess metal powder P thinly spread by the powder transfer unit 140 falls and collects, and can be separated and reused by a user if necessary.
  • the 3D printer 100 is used to remove all remaining metal powder (P) in the chamber 130 when stopping production of the 3D molded product (D) or replacing it with a metal powder (P) of another material.
  • a residual powder removal device 200 is provided.
  • the residual powder removal device 200 forcibly disperses the aggregated metal powder P by injecting an inert gas into the chamber 130, and transfers the scattered metal powder P to the outside of the chamber 130 together with the inert gas. After discharge, the metal powder P is filtered through the filter assembly 230 to remove the residual metal powder P in the chamber 130.
  • the residual powder removal device 200 is for collecting all of the residual metal powder P remaining in the chamber 130 to the outside of the chamber 130, and in the embodiment of the present invention, the upper part of the chamber 130 Each was installed at the bottom.
  • the residual powder removal device 200 includes a pump 210 for forcing a gas flow, a gas flow path 220 for guiding the gas forced to flow by the pump 210 to pass through the chamber 130, and the The filter assembly 230 installed on one side of the gas flow path 220 to filter the residual powder contained in the gas, and the vibration generated at one side of the gas flow path 220 and the filter assembly 230 to limit the aggregation of the residual powder
  • the generator 240 and the gas supply passage 250 for supplying an inert gas in communication with the gas passage 220, and the inert gas in the chamber 130 located inside the chamber 130 and in communication with the gas passage 220 ) It is configured to include a scattering unit 260 that scatters the residual powder by spraying inside.
  • the pump 210 is positioned on the gas flow path 220 to force an inert gas to flow into the gas flow path 220 in one direction.
  • the pump 210 is disposed on the upper and lower sides of the chamber 130, respectively, and in the embodiment of the present invention, the inert gas is configured to flow into the inner left and center bottom surfaces of the chamber 130. I did.
  • the gas flow path 220 is surrounded by the outer side of the chamber 130 and has a tube shape so that both ends communicate with the interior of the chamber 130 at different places, and the gas flow path of the residual powder removal device 200 installed on the upper side ( 220) is connected so that the left and right center portions of the chamber 130 communicate with each other, and the gas flow path 220 of the residual powder removal device 200 installed at the lower side is connected so that the left and right portions of the chamber 130 communicate with each other. do.
  • one side of the gas flow path 220 installed on the upper side is branched to communicate with the left and right sides of the upper surface of the chamber 130, respectively.
  • blowing fans 222 are installed at the ends of the branched gas flow path 220, respectively, and are configured to generate downward wind power by rotational power.
  • the filter assembly 230 is a configuration for selectively filtering the residual powder transported together with the inert gas through the gas flow path 220 and will be described in detail below.
  • a gas supply passage 250 is provided outside the gas passage 220.
  • the gas supply passage 250 is configured to forcibly flow an inert gas from the outside of the chamber 130 and supply it to the gas passage.
  • the gas supply passage 250 is configured to supply argon gas or nitrogen gas, and the gas supply passage 250 communicates with a cylinder 270 in which an inert gas is stored, and a gas supply passage at the other end thereof. It is configured to communicate with the inside (250).
  • the gas supply passage 250 is configured to be branched up/down to communicate with the gas passage 220 or the chamber 130.
  • the inert gas introduced through the gas supply passage 250 may flow in the direction of an arrow in FIG. 6 and may be introduced into the chamber 130.
  • the vibration generator 240 is configured to generate vibration by receiving power from the outside, and at least one or more is installed in each of the gas flow path 220 and the filter assembly 230 to provide the gas flow path 220 and the filter assembly 230 ) It functions to limit the agglomeration of the internal metal powder (P).
  • the vibration generator 240 includes an expansion vibration generator 242 installed in the gas flow path 220 and a regenerative vibration generator 244 installed in the filter assembly 230.
  • the expansion vibration generator 242 is installed on one side of the gas flow path 220 to prevent the metal powder P from being aggregated and agglomerated on the inner wall of the gas flow path 220 to narrow the pipe, thereby expanding the inside of the gas flow path 220 It is a configuration that allows you to maintain the status.
  • the regeneration vibration generator 244 is configured to shake off and drop the metal powder P accumulated in the filter assembly 230 so that the filtering function of the filter assembly 230 can be regenerated.
  • a scattering unit 260 is installed inside the chamber 130.
  • the scattering unit 260 communicates with the end of the gas flow path 220 but is configured to strongly inject an inert gas into the chamber 130, and by having a plurality of nozzles, the inert gas is injected at various angles to the chamber ( 130) It is configured to scatter metal powder (P) attached to the inner wall.
  • the scattering unit 260 is configured such that the spraying direction is variable. That is, the scattering unit 260 is preferably configured to be rotatable so that the injected inert gas can be injected into a wider area.
  • FIG. 7 is a cross-sectional view showing a detailed configuration of a filter assembly 230, which is one configuration, in the 3D printer 100 equipped with the residual powder removal device 200 according to the present invention.
  • the filter assembly 230 is disposed between the gas flow path 220, and fastening portions 236 are provided on both sides.
  • the fastening part 236 is a configuration for separating the filter assembly 230 from the gas flow path 220 when necessary.
  • the fastening part 236 maintains a sealed state so that inert gas or metal powder P does not leak when the residual powder removing device 200 is in operation.
  • the filter assembly 230 has a filter 232 for filtering residual powder by forming a flow path of an inert gas from the outside to the inside, and a space in a state in which the filter 232 is accommodated, and the gas flow path 220 ) And a filter housing 234 that communicates with the inert gas to be exhausted through the interior, and the above-described regeneration vibration generator 244.
  • the filter 232 has a cylindrical shape, but is formed such that the inside is opened only in the right direction.
  • the cylinder itself has a number of ventilation holes so that an inert gas can pass therethrough, and the ventilation holes are configured to have an inner diameter smaller than that of the metal powder (P), so that only the metal powder (P) is selectively filtered.
  • the metal powder P is in a more filtered state near the outer surface of the filter 232.
  • the filter housing 234 has a filter 232 accommodated therein, and the right part is coupled to communicate with the gas flow path 220.
  • the inert gas that has passed through the filter 232 and introduced into the filter 232 may move to the right and flow into the gas flow path 220.
  • a powder collection space 238 is formed inside the filter housing 234.
  • the powder collection space 238 refers to a space located below the filter 232 in the inner space of the filter housing 234, and a space for loading and collecting metal powder P separated from the filter 232 and dropped. to be.
  • the metal powder P collected in the powder collection space 238 can be reused by moving to a separate storage location when the filter assembly 230 is separated by disengaging the fastening part 236.
  • the fastening part 236 is preferably configured to have a sealing function.
  • a vibration generator 244 for regeneration is provided above the filter housing 234.
  • the regeneration vibration generator 244 is configured to provide vibration to the filter housing 234 and the filter 232 to remove the metal powder P attached to the filter 232.
  • the ventilation hole of the filter 232 can secure a large aperture ratio, thereby maximizing filtering efficiency.
  • FIG. 8 is a flow chart showing a method of removing residual powder of the 3D printer 100 using the residual powder removing apparatus 200 according to the present invention
  • FIG. 9 is a 3D diagram using the residual powder removing apparatus 200 according to the present invention.
  • the residual powder removal method using the residual powder removal device 200 includes a preparation step (S100) of applying power to the concentration measuring device 138 and the residual powder removal device 200 to prepare for removal of the residual powder, A filtering step (S200) of filtering the residual powder contained in the inert gas flowing by the residual powder removing device 200, and a completion step of ending the concentration measuring device 138 and the residual powder removing device 200 (S300) ) Is completed in sequence.
  • the concentration meter 138 continuously measures the concentration of the metal powder (P) inside the chamber 130 and provides it to the control panel, and the molding part 136 rises upward as shown in FIG. Thus, the three-dimensional molded article (D) is placed inside the chamber (130).
  • the remaining powder inside the molding part 136 is located inside the printing space 132, and the upper part of the storage part 134 and the powder collecting container 150 is preferably shielded by a separate cover 133. Do.
  • the regeneration vibration generator 244 is operated to limit the agglomeration of residual powder in the filter 232, and the expansion vibration generator 242 is also operated so that the residual amount on the inner wall of the gas flow path 220 It blocks the horse from attaching.
  • the filtering step (S200) includes a filtering process (S220) of selectively filtering only the residual powder of the residual powder and inert gas, and a concentration sensing process (S240) of detecting the concentration of the residual powder inside the chamber 130. ), and a concentration comparison process (S260) for comparing the concentration of the residual powder detected in the concentration detection process (S240) with a set concentration.
  • the filtering process (S220) is a process in which the residual powder introduced into the filter assembly 230 together with the inert gas is filtered by the filter 232, and is attached to the filter 232 by the action of the vibration generator 242 for expansion. The remaining powder may be separated from the filter 232 and dropped, thereby being collected in the powder collection space 238.
  • the regeneration vibration generator 244 regenerates the filter 232 by increasing the aperture ratio of the filter 232 by dropping the residual powder attached to the filter 232.
  • the concentration sensing process (S240) is a process of measuring the amount of residual powder remaining in the chamber 130 as a concentration.
  • the concentration detection process (S240) and the concentration comparison process (S260) are performed simultaneously, and the concentration comparison process (S260) is a process of continuously comparing the measured concentration of the residual powder inside the chamber 130 and the set concentration.
  • the 3D printer residual powder removal method using the residual powder removal device according to the present invention since it is possible to quickly recover the residual powder and prevent the risk of explosion due to inert gas, it can be said to have high industrial applicability.

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  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
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  • Automation & Control Theory (AREA)
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Abstract

La présente invention concerne un procédé d'élimination de poudre résiduelle d'imprimante 3D à l'aide d'un dispositif d'élimination de poudre résiduelle, qui comprend : une chambre, qui forme un espace d'impression dans lequel un produit moulé tridimensionnel est formé par réception d'un laser à partir d'un émetteur laser à l'intérieur d'une armoire qui protège une pluralité de composants ; un instrument de mesure de concentration permettant de mesurer la concentration de poudre métallique dispersée à l'intérieur de la chambre ; et une unité de transfert de poudre pour transférer la poudre métallique à l'intérieur de la chambre, un gaz inerte étant pulvérisé dans la chambre de telle sorte que la poudre métallique agglomérée est dispersée de force, et la poudre métallique est filtrée après avoir traversé un ensemble filtre, de telle sorte que la poudre métallique résiduelle à l'intérieur de la chambre est éliminée. Le procédé comprend : une étape de préparation consistant à appliquer de l'énergie à l'instrument de mesure de concentration et au dispositif d'élimination de poudre résiduelle de façon à préparer l'élimination de poudre résiduelle ; une étape de filtration consistant à filtrer la poudre résiduelle incluse dans le gaz inerte qui s'écoule au moyen du dispositif d'élimination de poudre résiduelle ; et une étape d'achèvement consistant à éteindre l'instrument de mesure de concentration et le dispositif d'élimination de poudre résiduelle.
PCT/KR2020/009635 2019-07-25 2020-07-22 Procédé d'élimination de poudre résiduelle d'imprimante 3d au moyen d'un dispositif d'élimination de poudre résiduelle WO2021015543A1 (fr)

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KR10-2019-0089948 2019-07-25
KR1020190089948A KR102090675B1 (ko) 2019-07-25 2019-07-25 잔여분말제거장치를 이용한 3d프린터 잔여분말 제거 방법

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