WO2017086317A1 - Dispositif de façonnage optique - Google Patents

Dispositif de façonnage optique Download PDF

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Publication number
WO2017086317A1
WO2017086317A1 PCT/JP2016/083842 JP2016083842W WO2017086317A1 WO 2017086317 A1 WO2017086317 A1 WO 2017086317A1 JP 2016083842 W JP2016083842 W JP 2016083842W WO 2017086317 A1 WO2017086317 A1 WO 2017086317A1
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WO
WIPO (PCT)
Prior art keywords
unit
optical
modeling
internal space
resin
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Application number
PCT/JP2016/083842
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English (en)
Japanese (ja)
Inventor
哲夫 法貴
玉水　雅巳
保 片山
Original Assignee
株式会社写真化学
株式会社セザック
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Application filed by 株式会社写真化学, 株式会社セザック filed Critical 株式会社写真化学
Publication of WO2017086317A1 publication Critical patent/WO2017086317A1/fr

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    • 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
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • 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

Definitions

  • the present invention relates to an optical modeling apparatus for manufacturing a three-dimensional modeled object.
  • Stereolithography technology is known as a technology for manufacturing a three-dimensional modeled object (for example, see Patent Document 1).
  • a liquid photosensitive resin is stored in a container, and a work table is fixed immediately below the liquid surface of the photosensitive resin. Beam-like light is irradiated onto the liquid surface of the photosensitive resin from an exposure device arranged at the top of the container so that the lowermost cross-sectional figure of the three-dimensional figure to be drawn is drawn. The portion of the photosensitive resin irradiated with light is solidified.
  • Patent Document 2 describes that a fine three-dimensional model having a size of about mm or several tens of ⁇ m can be manufactured by an optical modeling technique. However, in practice, it is difficult to manufacture a modeled object with high accuracy even if light drawing is performed finely.
  • An object of the present invention is to provide an optical modeling apparatus capable of manufacturing a modeled object with high accuracy.
  • An optical modeling apparatus is an optical modeling apparatus that manufactures a three-dimensional modeled object by an optical modeling method, and a resin holding unit that holds a photocurable resin so as to have a modeling surface.
  • a gas supply unit that supplies the purified gas purified by the above.
  • the resin holding part is accommodated in the casing.
  • the photocurable resin is held by the resin holding part.
  • Clean gas by the gas supply unit is supplied to the internal space in contact with the modeling surface of the photocurable resin in the housing. In this state, light is irradiated to the modeling surface of the photocurable resin by the optical unit.
  • the optical unit is disposed above the resin holding unit, the modeling surface is the upper surface of the photocurable resin held by the resin holding unit, and the internal space is located between the optical unit and the modeling surface,
  • casing may have a side part and a gas supply part may be arrange
  • the stereolithography apparatus can be miniaturized. Moreover, it becomes easy to supply clean gas to the internal space in contact with the modeling surface. Thereby, mixing of the foreign material to a modeling surface and exhaust heat of internal space can be performed more easily.
  • the stereolithography apparatus may further include a rectifying member that guides the clean gas supplied to the internal space by the gas supply unit in the horizontal direction.
  • a rectifying member that guides the clean gas supplied to the internal space by the gas supply unit in the horizontal direction.
  • a flow of clean gas along the modeling surface of the photocurable resin can be formed.
  • the gas supply unit since clean gas can be efficiently supplied to the internal space in contact with the modeling surface, the gas supply unit does not need to supply a large amount of clean gas. Therefore, the operation cost of the optical modeling apparatus can be reduced.
  • the rectifying member may include first and second rectifying plates respectively disposed on both sides of the internal space so as to face each other. In this case, the clean gas supplied to the internal space by the gas supply unit can be easily guided in the horizontal direction by the first and second rectifying plates.
  • the rectifying member further includes a third rectifying plate disposed in an upper portion of the internal space, and the third rectifying plate has a passage portion through which light irradiated from the optical unit to the modeling surface passes. Also good. In this case, the clean gas supplied to the internal space by the gas supply unit can be easily guided in the horizontal direction by the third rectifying plate without blocking the light irradiated to the modeling surface from the optical unit.
  • the housing may be provided with a take-out portion that enables removal of the shaped object, and the take-out portion may be arranged to face the gas supply portion with the resin holding portion interposed therebetween.
  • the extraction unit since the extraction unit is located downstream of the clean gas supplied by the gas supply unit, the clean gas is supplied from the gas supply unit toward the extraction unit. Thereby, it is prevented that the foreign material which generate
  • the housing may have an opening for dissipating heat to the outside.
  • the heat generated in the internal space can be dissipated to the outside with a simple configuration.
  • a shaped article can be manufactured with high accuracy.
  • FIG. 1 is a perspective view of an optical modeling apparatus according to an embodiment of the present invention.
  • FIG. 2 is a side view of the optical modeling apparatus of FIG.
  • FIG. 3 is a schematic diagram illustrating the configuration of the resin holding portion, the clean unit, the rectifying unit, and the optical unit of FIG.
  • FIG. 4 is a diagram visually showing shape data of a model to be manufactured.
  • FIG. 5 is a diagram for explaining the operation of the resin holding unit and the optical unit.
  • FIG. 6 is a diagram for explaining the operation of the resin holding unit and the optical unit.
  • FIG. 7 is a schematic diagram showing the configuration of the optical modeling apparatus according to the first modification.
  • FIG. 8 is a schematic diagram showing a configuration of an optical modeling apparatus according to the second modification.
  • FIG. 9 is an enlarged view of a modeled object manufactured by a conventional optical modeling apparatus.
  • FIG. 1 is a perspective view of an optical modeling apparatus according to an embodiment of the present invention.
  • FIG. 2 is a side view of the optical modeling apparatus 100 of FIG.
  • FIG. 3 is a schematic diagram illustrating the configuration of the resin holding unit 30, the clean unit 40, the rectifying unit 50, and the optical unit 60 of FIG.
  • directions indicated by arrows in the horizontal plane are referred to as an X direction and a Y direction.
  • the optical modeling apparatus 100 includes a main body frame 10, a control unit 20, a resin holding unit 30, a clean unit 40, a rectifying unit 50, an optical unit 60, and a housing 70.
  • the main body frame 10, the control unit 20, the resin holding unit 30, the rectifying unit 50 and the optical unit 60 are accommodated in the housing 70.
  • the portion of the housing 70 that houses the optical unit 60 is not shown.
  • the main body frame 10 includes a bottom surface portion 11, an intermediate surface portion 12, an upper surface portion 13, a plurality of support columns 14, and a plurality of reinforcement portions 15.
  • Each of the bottom surface portion 11, the middle surface portion 12, and the top surface portion 13 has a substantially rectangular shape.
  • the bottom surface portion 11, the middle surface portion 12, and the top surface portion 13 are arranged in a horizontal posture in this order from the bottom to the top.
  • Each support column 14 extends in the vertical direction and supports the bottom surface portion 11, the middle surface portion 12, and the top surface portion 13.
  • Each reinforcing portion 15 extends in the horizontal direction and is attached between adjacent struts 14 so as to reinforce the plurality of struts 14.
  • a plurality of wheels 16 and a plurality of support portions 17 are provided on the lower surface of the bottom surface portion 11.
  • the plurality of wheels 16 and the plurality of support portions 17 protrude downward from the bottom of the housing 70.
  • the stereolithography apparatus 100 When the stereolithography apparatus 100 is moved, the plurality of wheels 16 come into contact with the installation surface, and the plurality of support portions 17 are separated from the installation surface. In this case, the optical modeling apparatus 100 can be easily moved by rolling the plurality of wheels 16 on the installation surface.
  • the stereolithography apparatus 100 is not moved, the plurality of support portions 17 are in contact with the installation surface, and the plurality of wheels 16 are separated from the installation surface. Thereby, the optical modeling apparatus 100 can be fixed so that it cannot move.
  • the control unit 20 includes, for example, a central processing unit (CPU) (not shown).
  • the control unit 20 controls the operations of the resin holding unit 30 and the optical unit 60.
  • the control unit 20 is disposed on the upper surface of the bottom surface portion 11 of the main body frame 10.
  • the resin holding unit 30 includes a storage unit 31, a stage 32, and an elevating unit 33.
  • the reservoir 31 is a container having an upper opening, and is disposed on the upper surface of the upper surface portion 13 of the main body frame 10 of FIG.
  • the storage unit 31 stores liquid (fluid) photocurable resin.
  • the stage 32 is disposed in the vicinity of the horizontal surface (upper surface) of the photocurable resin stored in the storage unit 31.
  • the upper surface of the photocurable resin is the modeling surface 34.
  • An internal space of the housing 70 is formed between the modeling surface 34 of the resin holding unit 30 and the optical unit 60. The internal space is in contact with the modeling surface 34.
  • the light is irradiated to the modeling surface 34.
  • the raising / lowering part 33 is attached to the stage 32 so that the stage 32 can be raised / lowered.
  • the layer of the photocurable resin partially cured by the light irradiation is lowered, and an uncured photocurable resin layer is formed on the processed layer.
  • the upper surface of the uncured photocurable resin becomes a new modeling surface 34.
  • the clean unit 40 includes a fan 41, a filter 42, and a power supply device 43.
  • the power supply device 43 supplies power to the fan 41.
  • the filter 42 in the present embodiment is a HEPA (High Efficiency Particulate Air) filter.
  • the opening (particle removal performance) of the filter 42 is, for example, 1 ⁇ m or more and 10 ⁇ m or less, and in this example, 10 ⁇ m.
  • the clean unit 40 is disposed on a side surface portion 72 of the casing 70 described later so as to be positioned above one end portion in the Y direction of the middle surface portion 12 of the main body frame 10 in FIG.
  • the fan 41 supplies the clean gas purified by the filter 42 to the internal space in contact with the modeling surface 34 in the Y direction.
  • the flow of clean gas is shown by the white arrows in FIG.
  • the clean gas is clean air.
  • An inert gas such as nitrogen gas purified as a clean gas may be used.
  • the rectifying unit 50 includes rectifying plates 51, 52, and 53.
  • the rectifying plates 51 and 52 are respectively arranged along both side surfaces in a portion between the middle surface portion 12 and the upper surface portion 13 of the main body frame 10 (FIG. 1). Thus, the rectifying plates 51 and 52 face each other across the internal space above the resin holding portion 30 in the X direction.
  • the rectifying plate 53 is horizontally disposed on the lower surface of the upper surface portion 13 of the main body frame 10 (FIG. 1) so as to cover the upper side of the resin holding portion 30.
  • the rectifying plate 53 is formed with a passage portion 53a that is a circular opening.
  • the passage portion 53a of the rectifying plate 53 overlaps the modeling surface 34 in the vertical direction.
  • the rectifying plates 51 to 53 rectify the clean gas supplied by the clean unit 40 in the Y direction. Thereby, the clean gas flows along the modeling surface 34.
  • the optical unit 60 is disposed on the upper surface of the upper surface portion 13 of the main body frame 10 (FIG. 1).
  • the optical unit 60 includes a light source 61, a light intensity modulator 62, a beam expander 63, a lens 64, and two galvanometer mirrors 65 and 66.
  • the light source 61 is a laser transmitter, for example, and emits laser light having a wavelength in the ultraviolet region (for example, 255 nm to 405 nm).
  • the light intensity modulator 62 modulates the intensity of light passing through the light intensity modulator 62.
  • the beam expander 63 expands the diameter of light that passes through the beam expander 63.
  • the lens 64 gives a focus to the light passing through the lens 64.
  • the galvanometer mirror 65 includes an actuator part 65a and a mirror part 65b.
  • the actuator unit 65a is a motor having a vertical rotation axis.
  • the mirror part 65b is attached to the rotating shaft of the actuator part 65a. As the actuator portion 65a rotates, the reflection angle of the light reflected by the mirror portion 65b changes in the horizontal plane.
  • the galvanometer mirror 66 has the same configuration as the galvanometer mirror 65, and includes an actuator portion 66a and a mirror portion 66b.
  • the actuator portion 66a is a motor having a horizontal rotation axis.
  • the galvanometer mirror 66 is arranged so that the rotation axis of the actuator section 66a is orthogonal to the rotation axis of the actuator section 65a of the galvanometer mirror 65 in the horizontal plane. As the actuator 66a rotates, the reflection angle of the light reflected by the mirror 66b changes in the vertical plane.
  • the light emitted from the light source 61 sequentially passes through the light intensity modulator 62, the beam expander 63, and the lens 64, is reflected by the two galvanometer mirrors 65 and 66, and passes through the passage portion 53a of the rectifying plate 53.
  • a focal point of light is formed on the modeling surface 34 by the lens 64.
  • the actuator portions 65a and 66a of the galvanometer mirrors 65 and 66 are rotated, the light is scanned on the modeling surface 34 in two directions orthogonal to each other. Thereby, an arbitrary shape can be drawn on the modeling surface 34 with light.
  • the case 70 includes a door portion 71 extending in the vertical direction and three side surface portions 72, 73, 74 extending in the vertical direction.
  • the side surface portions 72 to 74 are indicated by dotted lines, and in FIG. 2, the side surface portions 72 to 74 are not shown.
  • the door part 71 and the side part 72 are arrange
  • the door part 71 is a one-sided door configured to be openable and closable.
  • the side surface portions 73 and 74 are arranged so as to block both side surfaces of the main body frame 10 in the X direction.
  • the part of the housing 70 facing the clean unit 40 with the resin holding part 30 interposed therebetween constitutes an outlet 75 for taking out a molded article manufactured by the resin holding part 30.
  • the user can take out the manufactured shaped article from the take-out part 75 by opening the door part 71. Further, the user can operate the resin holding part 30 by opening the door part 71.
  • the door portion 71 is formed with a window portion 76 that blocks transmission of light near the photosensitive wavelength of the photocurable resin. The user can visually recognize the inside of the housing 70 through the window 76.
  • the housing 70 is a non-sealed housing and has air permeability.
  • a plurality of openings 77 are formed in the door portion 71.
  • an opening (not shown) is formed in each of the side surfaces 72 to 74.
  • FIG. 4 is a diagram visually showing shape data of a model to be manufactured.
  • FIG. 4A is three-dimensional CAD (Computer Aided Design) data indicating the three-dimensional shape of the modeled object.
  • FIG. 4B is cross-sectional data showing a cross section for each position in the vertical direction of the modeled object.
  • FIG.4 (b) the several cross section of the molded article based on several cross section data is illustrated in the state laminated
  • the model to be manufactured is a wine glass.
  • FIG. 2 acquires the three-dimensional CAD data shown in FIG. 4 (a). Moreover, the control part 20 produces
  • 5 and 6 are diagrams for explaining the operations of the resin holding unit 30 and the optical unit 60.
  • the elevating unit 33 is moved to the initial position. Thereby, the upper surface of the stage 32 is located directly under the liquid surface (modeling surface 34) of the photocurable resin stored in the storage unit 31.
  • light is irradiated from the optical unit 60 onto the surface of the photocurable resin so that the lowermost one of the plurality of cross sections shown in FIG. 4B is drawn.
  • FIG.5 (b) the part of the photocurable resin irradiated with light solidifies, and the lowest part of the molded article W is manufactured on the modeling surface 34.
  • FIG.5 (b) the part of the photocurable resin irradiated with light solidifies, and the lowest part of the molded article W is manufactured on the modeling surface 34.
  • the stage 32 is lowered by a predetermined distance.
  • the descending amount of the stage 32 is substantially equal to the interval in the vertical direction of the plurality of cross sections in FIG.
  • the modeling surface 34 is irradiated with light from the optical unit 60 so that a cross section adjacent above the lowermost part of the modeled object W is drawn.
  • Fig.6 (a) the part of the photocurable resin to which light was irradiated solidifies, and the upper part of the lowest part of the molded article W is further manufactured.
  • the stage 32 is further lowered by a predetermined distance. Moreover, light is irradiated to the modeling surface 34 from the optical unit 60 so that the cross section of the part above the already manufactured part of the molded article W is drawn. By repeating these, as shown in FIG.6 (b), the molded article W is manufactured on the modeling surface 34.
  • FIG.6 (b) the molded article W is manufactured on the modeling surface 34.
  • the user U takes out the modeling object W from the extraction unit 75.
  • the take-out part 75 and the clean unit 40 face each other across the resin holding part 30 in the Y direction.
  • the extraction unit 75 is located downstream of the clean gas supplied by the clean unit 40, so that clean gas is supplied from the clean unit 40 toward the extraction unit 75.
  • produces when the user U takes out the molded article W mixes in the storage part 31.
  • the foreign matter is prevented from adhering to the modeling surface 34.
  • the optical modeling apparatus 100 includes the rectifying plates 51 to 53, but the present invention is not limited to this.
  • the optical modeling apparatus 100 may not include some or all of the rectifying plates 51 to 53.
  • FIG. 7 is a schematic diagram illustrating a configuration of the optical modeling apparatus 100 according to the first modification. 7, illustration of the main body frame 10 and the control unit 20 of FIG. 1 is omitted. The same applies to FIG. 8 described later. As shown in FIG. 7, the optical modeling apparatus 100 according to the first modification does not include the rectifying plates 51 to 53.
  • FIG. 8 is a schematic diagram illustrating the configuration of the optical modeling apparatus 100 according to the second modification. As shown in FIG. 8, the optical modeling apparatus 100 according to the second modification is arranged so as to supply clean gas downward. Further, the optical shaping apparatus 100 according to the second modified example does not include the rectifying plates 51 to 53, but is not limited thereto, and may include a part or all of the rectifying plates 51 to 53.
  • FIG. 9 is an enlarged view of a model W manufactured by a conventional optical modeling apparatus.
  • a model W in FIG. 9 is different from the model W in FIGS. 5 and 6.
  • fine foreign matters such as lint are mixed in the modeled object W manufactured by the conventional optical modeling apparatus. In this case, the accuracy of the shaped article W is greatly reduced.
  • the clean gas from the clean unit 40 is supplied to the internal space in contact with the modeling surface 34 of the photocurable resin.
  • foreign substances are prevented from entering the modeling surface 34 of the photocurable resin by the clean gas.
  • the influence of heat on the optical unit is reduced. Thereby, light can be irradiated to the desired position of the modeling surface 34 without being influenced by heat. As a result, the shaped article W can be manufactured with high accuracy.
  • the clean unit 40 supplies clean gas from the side surface 72 of the housing 70 to the internal space.
  • the optical modeling apparatus 100 can be reduced in size.
  • the clean gas is guided in the horizontal direction by the rectifying plates 51-53.
  • a flow of clean gas along the modeling surface 34 can be formed.
  • the clean unit 40 since clean gas can be efficiently supplied to the internal space in contact with the modeling surface 34, the clean unit 40 does not need to supply a large amount of clean gas. Therefore, the operation cost of the optical modeling apparatus 100 can be reduced.
  • the photocurable resin has a liquid state, but the present invention is not limited to this.
  • the photocurable resin may have fluidity by adding a powder material such as ceramic as an additive.
  • the upper surface of the photocurable resin is the modeling surface 34, but the present invention is not limited to this.
  • the modeling surface 34 may be the other part of the photocurable resin.
  • the modeling surface 34 may be the lower surface of the photocurable resin.
  • the optical modeling apparatus 100 includes the main body frame 10, but the present invention is not limited to this.
  • the optical modeling apparatus 100 may not include the main body frame 10.
  • the casing 70 is a non-sealed casing and has air permeability, but the present invention is not limited to this.
  • the casing 70 may be a sealed casing and may not have air permeability.
  • the molded article W is an example of a molded article
  • the optical modeling apparatus 100 is an example of an optical modeling apparatus
  • the modeling surface 34 is an example of a modeling surface
  • the resin holding part 30 is a resin holding part.
  • the optical unit 60 is an example of an optical unit
  • the case 70 is an example of a case
  • the filter 42 is an example of a filter
  • the clean unit 40 is an example of a gas supply unit
  • the side part 72 is a side part.
  • the rectifying unit 50 is an example of a rectifying member
  • the rectifying plates 51 to 53 are examples of first to third rectifying plates
  • the passage portion 53a is an example of a passage portion
  • the extraction portion 75 is an example of an extraction portion.
  • the opening 77 is an example of the opening.
  • the present invention can be effectively used for an optical modeling apparatus.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)

Abstract

Ce dispositif de façonnage optique est pourvu d'une partie contenant de la résine, d'une unité optique, d'un boîtier et d'une unité de nettoyage. La partie contenant de la résine est stockée dans le boîtier. La partie contenant de la résine contient une résine photodurcissable. La résine photodurcissable présente une surface de façonnage. De l'air propre purifié par l'unité de nettoyage est fourni dans un espace interne qui est en contact avec la surface de façonnage de la résine photodurcissable dans le boîtier. Dans cet état, de la lumière est appliquée sur la surface de façonnage de la résine photodurcissable par l'unité optique. Par conséquent, un produit façonné tridimensionnel est produit sur la surface de façonnage par stéréolithographie.
PCT/JP2016/083842 2015-11-20 2016-11-15 Dispositif de façonnage optique WO2017086317A1 (fr)

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Application Number Priority Date Filing Date Title
JP2015227924A JP6767007B2 (ja) 2015-11-20 2015-11-20 光造形装置
JP2015-227924 2015-11-20

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US20190251077A1 (en) * 2018-11-07 2019-08-15 Alibaba Group Holding Limited Facilitating practical byzantine fault tolerance blockchain consensus and node synchronization
CN113853264A (zh) * 2019-05-15 2021-12-28 德马吉森精机株式会社 加工机械

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JP7003264B2 (ja) * 2018-07-05 2022-01-20 三井化学株式会社 三次元造形装置、制御装置、および造形物の製造方法

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WO2014164807A1 (fr) * 2013-03-13 2014-10-09 United Technologies Corporation Système de filtrage ininterrompu pour processus de fabrication d'additif de lit de poudre de fusion au laser sélectif
JP2016006215A (ja) * 2014-06-20 2016-01-14 株式会社ソディック 積層造形装置
JP2016052778A (ja) * 2014-09-03 2016-04-14 エスエルエム ソルーションズ グループ アーゲー 改良されたガス回路を備えるワークピースの製造装置

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JPH04505588A (ja) * 1988-04-18 1992-10-01 スリーディー、システムズ、インコーポレーテッド ３次元物体の形成方法
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Publication number Priority date Publication date Assignee Title
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US10803052B2 (en) * 2018-11-07 2020-10-13 Alibaba Group Holding Limited Facilitating practical byzantine fault tolerance blockchain consensus and node synchronization
US11397725B2 (en) * 2018-11-07 2022-07-26 Advanced New Technologies Co., Ltd. Facilitating practical byzantine fault tolerance blockchain consensus and node synchronization
CN113853264A (zh) * 2019-05-15 2021-12-28 德马吉森精机株式会社 加工机械
EP3960333A4 (fr) * 2019-05-15 2023-07-12 DMG Mori Co., Ltd. Machine de traitement
CN113853264B (zh) * 2019-05-15 2024-03-08 德马吉森精机株式会社 加工机械

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