JP2019048478A - Formation device for forming three-dimensional structure - Google Patents

Abstract

To provide a formation device for forming a three-dimensional structure having degree of freedom of shaping (forming).SOLUTION: A formation device 30 for forming a three-dimensional structure 5 having a shaped object and a color portion obtained by coloring the shaped object surface by lamination, wherein a first operation mode only for shaping the shaped object can be switched with a second operation mode for shaping the shaped object and coloring the shaped object surface full color based on an input data simultaneously.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a forming apparatus for forming a three-dimensional structure, and more particularly to a forming apparatus for depositing an ink to form a layer and laminating the layers to form a three-dimensional structure.

  In addition to the sheet laminating method as described in Patent Document 1, a melt deposition method (FDM: Fused Deposition Modeling), an ink jet method, an ink jet binder method, a stereolithography method (SL: Stereo Lithography), a powder sintering method (SLS: Selective A technique for forming a three-dimensional object using Laser Sintering or the like is known.

  Among them, as an inkjet method, a method of injecting a UV curable resin by a 3D printer and laminating patterns is widely used. In this method, after the design, mechanism and the like of the appearance and appearance of the final product are digitized by three-dimensional CAD, the data is sliced by a computer to create multi-layered pattern data such as laminating thin plates A three-dimensional object is formed by injecting and laminating resin from a head according to pattern data.

Unexamined-Japanese-Patent No. 2001-18297 (July 9, 1999 publication)

  The inventor of the present invention has laminated a three-dimensional structure color-decorated by discharging an ink for forming and an ink for decoration (for example, colored inks such as yellow, magenta, cyan, black, etc.) by the ink jet method. The invention formed in a system is completed prior to the present application and a patent application is filed (the application is not disclosed at the time of the present application).

  Then, the inventor of the present application studied improvement from the viewpoint of giving freedom in shaping (forming), found a new forming apparatus of a three-dimensional structure, and came to complete the present invention.

  That is, an object of the present invention is to provide a forming apparatus for forming a three-dimensional structure, wherein the forming apparatus has freedom in modeling.

  In order to solve the above-mentioned subject, a formation device of a three-dimensional structure concerning the present invention forms a three-dimensional structure which has a modeling thing and a colored portion which has colored the modeling thing surface by lamination. A forming apparatus for a three-dimensional structure, a first operation mode for forming only the shaped object, and a second operation for performing full color coloring of the surface of the shaped object based on input data simultaneously with forming the shaped object It has a mode, and it is characterized by having a switching part which changes the 1st operation mode and the 2nd operation mode.

  According to the above configuration, by providing the switching unit, the operation mode is switched between the case where the user only needs modeling and the case where a three-dimensional structure on which the coloring of the surface of the model is also desired is desired. Can.

  Also, for example, since the ink resolution used for full color coloring is generally higher (fine) than the ink resolution used for modeling, it is not necessary to consider the color tone, and only the modeling may be performed. It is possible to build with an ink resolution that is lower (coarse) than the resolution. In this case, when the first operation mode is selected, there is an effect that a shaped object can be formed quickly.

  Moreover, one form of the formation apparatus of the three-dimensional structure which concerns on this invention is equipped with an inkjet head in addition to said structure, The modeling material for the said modeling from the said inkjet head, and coloring for the said coloring Layers formed by discharging the material are stacked.

  Further, in addition to the above-described configuration, one embodiment of the three-dimensional structure forming apparatus according to the present invention has the coloring of a plurality of layers within the time of the scanning cycle for forming one layer in the formation. Perform a scan to form a layer.

  According to the above configuration, the ink resolution of the full-color-colored portion becomes finer than that of the portion of the modeling where it is not necessary to consider the color tone. Thereby, a halftone color tone can be favorably exhibited in the full-color colored portion.

  In addition to the above configuration, one form of the three-dimensional structure forming apparatus according to the present invention has a plurality of transparent protective layers within the time of the scanning cycle for forming one layer in the above-mentioned formation Perform a scan to form

  According to the above configuration, the surface roughness of the transparent protective layer can be reduced, and gloss can be provided.

  Moreover, in addition to said structure, one form of the formation apparatus of the three-dimensional structure based on this invention is an ultraviolet curable ink, the said modeling material and the said coloring material.

  According to the above configuration, by using the ultraviolet curable ink as the forming material and the coloring material, it can be cured in a short time, so it is easy to stack, and a three-dimensional structure can be formed in a short time it can.

  In addition to the above configuration, one embodiment of a three-dimensional structure forming apparatus according to the present invention includes a first ink jet head nozzle unit that discharges the above-mentioned forming material, and a second ink jet head nozzle that discharges the above coloring material And a plurality of irradiators having a light source for curing the ink, wherein the plurality of irradiators clamp the first inkjet head nozzle portion and the second inkjet head nozzle portion in the scanning direction. Are arranged.

  According to the above configuration, since the irradiation unit is disposed so as to sandwich the first inkjet head nozzle unit and the second inkjet head nozzle unit in the scanning direction, the dropped ink is efficiently cured. be able to.

  According to the present invention, since the mode can be selected, an apparatus for forming a three-dimensional structure having a degree of freedom of formation (formation) is provided.

It is a block diagram which shows the main structures of one form of the formation apparatus which concerns on this invention. FIG. 2 is a view showing a lower surface of a recording unit which is a part of the forming apparatus shown in FIG. It is a perspective view of the three-dimensional structure formed by the formation apparatus shown in FIG. It is sectional drawing of the three-dimensional structure shown in FIG. FIG. 4 is a plan view of one of a plurality of layers constituting the three-dimensional structure shown in FIG. 3. It is the figure which showed typically a part of three-dimensional structure formed by the formation apparatus shown in FIG. It is a figure which shows the control flow of the control unit comprised to the formation apparatus shown in FIG.

  An embodiment of a three-dimensional structure forming apparatus according to the present invention will be described below.

  In addition, the term "three-dimensional structure" used in this-application specification defines as a three-dimensional thing which has a three-dimensional object and a colored part which has colored the three-dimensional object surface.

(1) Three-Dimensional Structure Forming Device FIG. 1 is a block diagram showing the main configuration of a three-dimensional structure forming device (hereinafter referred to as a forming device) according to this embodiment.

  The forming apparatus 30 of the present embodiment is an apparatus for forming a three-dimensional structure composed of a shaped object and a colored portion coloring the surface of the shaped object by lamination. Therefore, as shown in FIG. 1, the forming apparatus 30 of the present embodiment includes the recording unit 10 and the control unit 20 (switching unit). The recording unit 10 is a unit that performs shaping and coloring, and the control unit 20 controls the shaping and coloring. Each configuration will be described in detail below.

● Recording unit 10
FIG. 2 shows a specific configuration of the recording unit 10. FIG. 2 shows the ink ejection surface (lower surface) of the recording unit 10.

  The recording unit 10 includes a carriage 13, an inkjet head 11, and a UV irradiation unit 12.

  The carriage 13 is reciprocally movable along the Y axis, and mounts the ink jet head 11 and the UV irradiation unit 12.

  The inkjet head 11 discharges the ink using an inkjet method. An ultraviolet curable ink can be used as the ink to be discharged. If an ultraviolet curable ink is used, it can be cured in a short time, so that it is easy to stack, and there is an advantage that a three-dimensional structure can be manufactured in a shorter time. The UV curable ink contains a UV curable compound. The ultraviolet curable compound is not limited as long as it is a compound that cures when irradiated with ultraviolet light. Examples of the ultraviolet curable compound include curable monomers and curable oligomers which are polymerized by irradiation of ultraviolet light. Examples of the curable monomers include low viscosity acrylic monomers, vinyl ethers, oxetane monomers, and cyclic aliphatic epoxy monomers. As a hardening type oligomer, an acryl-type oligomer is mentioned, for example. In addition, this invention is not limited to an ultraviolet curing ink, For example, a thermoplastic ink can be used. When a thermoplastic ink is used, the discharged heating ink is cured by cooling. At this time, a method of forced cooling may be used in order to cure in a shorter time.

  The inkjet head 11 has the 1st inkjet head nozzle part 11A which discharges a modeling material, and the 2nd inkjet head nozzle part 11B which discharges a coloring material, as shown in FIG.

  The first ink jet head nozzle portion 11A is an ink which is a modeling material for modeling a three-dimensional structure and is a support material for covering the periphery of the three-dimensional structure to support the stacking of the overhang portion. Eject ink. In the present embodiment, a transparent ink and a white ink are used as the forming material. Therefore, in the first inkjet head nozzle unit 11A, a support ink nozzle row SP for discharging the ink of the support material, a shaping ink nozzle row MAIN for discharging the shaping ink, and a white ink nozzle row for discharging white ink And W. Although a conventionally well-known modeling ink can be used for modeling ink, it is also possible to use white ink or transparent ink so that it may mention later.

  The second inkjet head nozzle unit 11B ejects an ink which is a coloring material for forming a colored portion which is a part of the three-dimensional structure. In the present embodiment, yellow ink, magenta ink, cyan ink, black ink and transparent ink are used as coloring materials. Therefore, the second ink jet head nozzle unit 11B includes a yellow ink nozzle row Y for discharging yellow ink, a magenta ink nozzle row M for discharging magenta ink, and a cyan ink nozzle row C for discharging cyan ink. A black ink nozzle row K for discharging black ink and a transparent ink nozzle row CL for discharging transparent ink are provided.

  The plurality of nozzle arrays provided in the first inkjet head nozzle unit 11A and the plurality of nozzle arrays provided in the second inkjet head nozzle unit 11B are arranged along the scanning direction (Y-axis direction) of the recording unit 10. ing. That is, as shown in FIG. 2, the yellow ink nozzle row Y, the magenta ink nozzle row M, the cyan ink nozzle row C, the black ink nozzle row K, the transparent ink nozzle row CL, and white color. The ink nozzle row W, the shaping ink nozzle row MAIN, and the support ink nozzle row SP are arranged in this order along the Y-axis direction. Since the recording unit 10 mounts each of the plurality of nozzle rows on the carriage 13, the ultraviolet curable ink is ejected in the Z-axis direction from the plurality of nozzle rows when the carriage 13 moves in the Y direction. ) Has become possible.

  In each nozzle row, a plurality of nozzle holes are arranged in the X-axis direction.

  The arrangement order and the number of nozzle rows are not limited to those shown in FIG. For example, the nozzle array MAIN for forming ink and the nozzle array SP for supporting ink have a larger ejection amount than others, so multiple arrays may be arranged, and the total number of nozzle holes per nozzle array may be increased to achieve high density. Good. As a result, it is possible to speed up the first operation mode which is only forming. Further, the second ink jet head nozzle portion 11B may be provided with a white ink nozzle row W for enabling color coloring by subtractive color mixing.

  The UV irradiator 12 has a plurality of irradiators 12 A having a light source for curing the ink, and the irradiator 12 is mounted on the carriage 13. Specifically, the UV irradiation unit 12 has three irradiators 12A arranged along the Y-axis direction, and sandwiches the first ink jet head nozzle unit 11A and the second ink jet head nozzle unit 11B therebetween. It is arranged in a way. That is, in the carriage 13, the irradiator 12A, the first inkjet head nozzle portion 11A, the irradiator 12A, the second inkjet head nozzle portion 11B, and the irradiator 12A are disposed in this order along the Y-axis direction. As described above, since all the nozzle rows are arranged in the Y direction, it is possible to form a layer by discharging all the ink in one layer by one movement in the Y direction. Since the ultraviolet irradiation is also performed simultaneously with the discharge of the ink by the movement in the Y direction, the further curing in the case of the ultraviolet curable ink can be performed at the same timing as the discharge.

  The three irradiators 12A constituting the UV irradiator 12 all have at least an irradiation intensity for curing a small ink droplet to be described later for forming a colored portion during movement in the Y-axis direction. All three irradiators 12A may have the same irradiation intensity, or the irradiation intensities may be different.

  In addition, all of the three irradiators 12A only have an irradiation intensity that cures small ink droplets described later, and cure large ink droplets described later during one movement in the Y-axis direction. If only the irradiation intensity can not be obtained, the large ink droplet may be temporarily cured by the irradiator 12A. According to this aspect, the shape of the shaped article can be adjusted during temporary curing, and it is also possible to completely cure after adjustment.

● Control unit 20
The control unit 20 is for controlling the recording unit 10. One of the characteristic points of the forming apparatus 30 of the present embodiment is that the control unit 20 controls the recording unit 10 to simultaneously perform the first operation mode of forming only a three-dimensional object, and simultaneously form the three-dimensional object. The point is that the operation mode can be switched to the second operation mode in which the surface of the object is colored in full color based on the input data.

  As shown in FIG. 1, the control unit 20 includes a setting unit 21 (switching unit), a first control unit 22 and a second control unit 23.

  The setting unit 21 is for performing various settings and input operations. The setting (switching) of the above-described operation mode can be set by the user from the setting unit 21. The setting unit 21 can generate information indicating setting content and input content, and can output the generated information to the first control unit 22 and the second control unit 23.

  The first control unit 22 controls the ejection of various inks from the inkjet head 11 of the recording unit 10 based on the information acquired from the setting unit 21. The specific content of control will be described later.

  In addition, the first control unit 22 is provided with a storage unit (not shown), and the storage unit stores shape data of the three-dimensional structure (including input data for forming a colored portion) and the like. Ru. Specifically, in the storage unit, multi-layered pattern data such as slicing thin pieces of data by a computer and overlaying thin plates after converting the design, mechanism and the like of the appearance of the final product into data by three-dimensional CAD It is memorized. The shape data of the three-dimensional structure may be obtained from the outside of the first control unit 22, may be stored in advance in the storage unit, or may be the first control The first control unit 22 may generate the information based on the information acquired from the outside of the unit 22.

  The second control unit 23 is for controlling the irradiation of the UV irradiation unit 12 of the recording unit 10.

  The control unit 20 is also provided with a control unit (not shown) that controls the movement of the carriage 13.

(2) Operation of forming apparatus (forming method of three-dimensional structure)
In the present embodiment, it is possible to switch between a first operation mode of forming only a shaped object and a second operation mode of full-coloring the surface of the shaped object based on input data simultaneously with the formation of the shaped object. Furthermore, the feature of the present embodiment is that, using the forming apparatus 30 described above, scanning for forming a plurality of colored layers is performed within the time of the scanning cycle for forming one layer in modeling. It is on the point.

  Although the detail of the formation method performed using a formation apparatus below is demonstrated, the structure of the three-dimensional structure formed is demonstrated before that.

(2-1) Configuration of Three-Dimensional Structure FIG. 3 is an external view of a three-dimensional structure formed using the forming apparatus 30 of the present embodiment, and FIG. 4 is a cutting line AA of FIG. It is arrow sectional drawing of the three-dimensional structure in '.

  The three-dimensional structure 5 has a substantially cylindrical shape in which the upper surface, the lower surface, and the side surface are flat, the curved surface from the side surface to the upper surface, and the curved surface from the side surface to the lower surface. In addition, the shape of the three-dimensional structure is not limited to the shape shown in FIG. 3 and can be applied to any shape such as a spherical shape, a hollow structure, a ring structure or a horseshoe shape other than a hexahedron described later . Moreover, the outer side of the three-dimensional structure 5 is covered with the support layer S which enables modeling of the structure of an overhang.

  The three-dimensional structure 5 has a second transparent layer 4 and a colored layer 3 formed of an ink containing a coloring agent (colored ink) from the surface side (peripheral side) to the inside (central side) A first transparent layer 2 (FIG. 4) formed of a transparent ink, a white layer 1 (FIG. 4) formed of a white ink having light reflectivity, and a shaping layer M constituting a shaping main body portion It is formed in this order. That is, in the three-dimensional structure 5, the white layer 1, the first transparent layer 2, the colored layer 3, and the second transparent layer 4 are coated in this order on the shaping layer M existing in the central portion. ing.

  In the present embodiment, although the modeling layer M and the white layer 1 are regarded as a modeling object, only the modeling layer M may be configured as a modeling object, or the modeling may be performed only by the white layer 1 without providing the modeling layer M. You may constitute an object. Moreover, a cavity may be provided in the shaped article.

  The shaped layer M, the white layer 1, the first transparent layer 2, the colored layer 3, the second transparent layer 4, and the support layer S are all deposited by using the ink jet method. It is formed. In addition, the support ink of the support layer S is water-soluble, and the three-dimensional structure 5 can be taken out by dissolving and removing it with water after completion of modeling.

  The cross section of the three-dimensional structure 5 shown in FIG. 4 is a cross section along the YZ plane appearing at the center position of the three-dimensional structure 5 in the XYZ coordinate system shown in FIG.

  The three-dimensional structure 5 is, as shown in FIG. 4, a structure formed by a lamination method in which a plurality of layers 5a are laminated by using an inkjet method. The drawing shows a coordinate system in which the axis along the stacking direction is the Z axis. In this coordinate system, each layer 5a extends along the XY plane. Although 21 layers are stacked in FIG. 4, the total number of layers to be stacked is not particularly limited.

  As described above, the white layer 1, the first transparent layer 2, the colored layer 3, and the second transparent layer 4 are formed in this order from the shaping layer M located at the center to the surface side. The three-dimensional structure 5 coated with the layer M is sliced in a plurality of layers in the Z-axis direction as shown in FIG. (Hereinafter, portion 50 of the shaping layer), portion of the white layer 1 (hereinafter, portion 51 of the white layer), portion of the first transparent layer 2 (hereinafter, portion 52 of the first transparent layer), of the colored layer 3 A portion (hereinafter, portion 52 of the colored layer) or a portion of the second transparent layer 4 (hereinafter, portion 54 of the second transparent layer) is included.

  Specifically, as shown in FIG. 4, among the plurality of layers 5a, the layer 5a located at the lowermost position shown in FIG. 4 and the layer 5a located at the uppermost position are a part of the second transparent layer The layer 5a is made of only 54. And the layer 5a by which the part 54 of a 2nd transparent layer was formed in the outer periphery of the part 53 of a colored layer is arrange | positioned at the opposing side (inner side) of these layers 5a, respectively. Furthermore, inside thereof, the second transparent layer portion 54, the colored layer portion 53 and the first transparent layer portion 52 are disposed in this order from the outer peripheral edge toward the center. Furthermore, on the inner side thereof, a layer 5a in which a portion 54 of the second transparent layer, a portion 53 of the colored layer, a portion 52 of the first transparent layer and a portion 51 of the white layer are formed in this order Place. Then, an intermediate region sandwiched between them is a portion 54 of the second transparent layer, a portion 53 of the colored layer, a portion 52 of the first transparent layer, a portion 51 of the white layer, and the shaping layer The layer 5a (in FIG. 4, the layers 5a (n) and 5a (n + 1) are shown) in which the portions 50 are formed in this order is disposed. In FIG. 5, the portion 54 of the second transparent layer, the portion 53 of the colored layer, the portion 52 of the first transparent layer, the portion 51 of the white layer, and the portion 50 of the shaping layer are arranged in this order The top view (XY top view) of formed layer 5a is shown.

  The number of the various layers provided is not limited to that shown in FIG. In addition, as long as the three-dimensional structure 5 shown in FIG. 4 is formed by a lamination method, the configuration of each layer 5a is not limited to that described above.

  As shown in FIG. 4, by laminating the plurality of layers 5a in the Z-axis direction, a portion 54 of the second transparent layer of each of the layers 5a is generally continued in the direction of the outermost surface of the three-dimensional structure 5. , And the second transparent layer 4 are formed. The colored layer 3 is formed such that the colored layer portion 53 of each layer 5a, which includes the colored layer portion 53, extends substantially in the direction of the outermost surface of the three-dimensional structure 5. In addition, a portion 52 of the first transparent layer of each of the layers 5a ... including the portion 52 of the first transparent layer is substantially continuous with the outermost surface direction of the three-dimensional structure 5 to form the first transparent layer 2 doing. In addition, the portions 51 of the white layer of each of the layers 5a ... including the portion 51 of the white layer are generally continuous with the outermost peripheral surface direction of the three-dimensional structure 5 to form the white layer 1. In addition, a portion 50 of the shaping layer of each layer 5a, which includes the portion 50 of the shaping layer, is laminated to form the shaping layer M.

  By arranging in this manner, it is possible to realize a three-dimensional structure 5 that exhibits a desired color tone even when viewed from all directions.

  Here, in the present embodiment, of the three-dimensional structure 5 shown in FIG. 3 and FIG. 4, the second transparent layer 4, the colored layer 3, and the first transparent layer 2 from the surface layer side (peripheral side) It corresponds to "coloring part". And the white layer 1 and the modeling layer M inside the inside shall correspond to a "model." That is, the three-dimensional structure 5 shown in FIG. 3 and FIG. 4 excludes the first transparent layer 2, the colored layer 3 and the second transparent layer 4 from the three-dimensional structure. Therefore, a three-dimensional object can be shaped by laminating only the region including the portion 50 of the shaped layer and the portion 51 of the white layer among the various layers 5a described above, and laminating the layers. In addition, the shaped object may be shaped with only a portion 50 of the shaped layer, or may be shaped with the portion 50 of the shaped layer and the second transparent layer 4.

  That is, the forming apparatus 30 of the present embodiment uses the ink jet method to form a three-dimensional structure 5 shown in FIG. 3 and FIG. 4 even when forming a three-dimensional object. By laminating, an object (a shaped object, a three-dimensional structure) can be completed.

  In addition, if the colored layer 3 is included in the “colored portion” and the shaping layer M is included in the “shaped object”, the first transparent layer 2 and the white layer 1 existing therebetween are the “colored portion” and It may be included in any of the “shaped objects”. However, in order to enable color coloring by the subtractive color mixing method in the coloring layer 3, the presence of the white layer 1 is necessary.

(2-2) Operation Mode In the present embodiment, the forming device 30 performs the first mode in which only the shaped object is formed, and the formation of the colored portion as shown in FIG. 4 simultaneously with the formation of the formed object. And a second operation mode for forming the three-dimensional structure 5. The three-dimensional structure 5 in which the colored portions are formed simultaneously with the formation of the three-dimensional object by laminating the various layers 5a shown in FIG. 3 and FIG. 4 is by operating the forming device 30 in the second operation mode. It is an object to be obtained. On the other hand, when the portions including the portion 50 of the shaping layer of the respective 5a shown in FIG. 4 and the portion 51 of the white layer are laminated, a shaped object is formed. The three-dimensional object is an object obtained by operating the forming device 30 in the first operation mode. In addition, when modeling only a three-dimensional object, the layer which has only the part 51 of a white layer is arrange | positioned (lamination) in a top position and the lowest position.

  Further, in the present embodiment, the user can switch these operation modes in the setting unit 21 of the control unit 20. Thereby, it is possible to switch the operation mode between the case where the user desires only the formation of the shaped object and the case where the three-dimensional structure where the coloring of the surface of the formed object is also desired is desired.

  And the further merit of the formation apparatus 30 which can switch a mode in this way can model (provide) a modeling thing quickly, when a 1st operation mode is chosen. This point will be clarified in the description of the forming method using the forming apparatus 30.

(2-3) Second Operation Mode FIG. 6 is a partial cross-sectional view showing details in the vicinity of the surface layer of layers 5a (n) and 5a (n + 1) shown in FIG. In FIG. 6, in each of the layers 5a (n) and 5a (n + 1), one drop of ink ejected from the ink jet nozzle is schematically shown as a cube of one mass. In the layers 5a (n) and 5a (n + 1) shown in FIG. 6, only the region surrounded by the broken line in FIG. 4 is shown for convenience of explanation. Therefore, a part of the shaping layer and a part 55 of the support layer Not shown. The paper surface right end of the layers 5a (n) and 5a (n + 1) shown in FIG. 6 is a part of the outermost surface of the second transparent layer 4 formed by connecting the side surfaces of the outer peripheral ends of the layers. Part of the In addition, a part 53 of the colored layer in FIG. 6 is composed of three types of ink of cyan, magenta, and transparency, and the surface of the object is light blue on a macroscopic basis.

  One of the features of the forming method of the present embodiment is that, as shown in FIG. 6, the size of one drop of ink ejected from the ink jet for forming the portion 51 of the white layer is a portion of the first transparent layer. 52, a portion 53 of the colored layer, and a point larger than the size of a drop of ink ejected from the inkjet to form a portion 54 of the second transparent layer. FIG. 6 is schematic and by way of example only, the volume of one drop of ink for forming the portion 51 of the white layer is the portion 52 of the first transparent layer, the portion 53 of the colored layer, and the second It is eight times the volume of a drop of ink to form a portion 54 of the transparent layer.

  As a method of making the difference in size in this manner, the ink droplet ejected from the ink jet nozzle to form the portion 51 of the white layer, the portion 52 of the first transparent layer, the portion 53 of the colored layer, and the second There is a method of making it larger than the ink droplet ejected from the ink jet nozzle to form a portion 54 of the transparent layer. That is, this is a method of forming the difference in size shown in FIG. 6 in the size of the ink droplet at the time of discharge from the ink jet nozzle.

  However, the present invention is not limited to this, and the size of the ink droplet ejected from the ink jet nozzle is a portion 51 of the white layer, a portion 52 of the first transparent layer, a portion 53 of the colored layer, and the second The number of ejections per unit time of only the white ink for forming the portion 51 of the white layer is made uniform in size in any of the portion 54 of the transparent layer, the portion 52 of the first transparent layer, of the colored layer There is also a method of increasing the number of ejections per unit time of various inks to form the portion 53 and the portion 54 of the second transparent layer. According to this method, the white ink forming the portion 51 of the white layer is continuously ejected from the nozzle, so that these ink droplets are combined before landing, or are deposited together when landing. , Large sized ink droplets can be formed. The number of discharges per unit time can be realized by controlling the ink discharge timing.

  The difference in ink droplet size shown in FIG. 6 is realized by the control unit 20 controlling the recording unit 10 in the forming device 30 shown in FIG.

  In the above description, the volume difference of one drop of ink is described as eight times, but the relationship between the portion 51 of the white layer and the portion 52 of the first transparent layer shown in FIG. 6 is one white layer It is also possible to interpret that the portion 52 of the first transparent layer is formed in two layers with respect to the portion 51 of. This is because the forming apparatus 30 operating in the second operation mode performs scanning for forming two colored layers within the time period of the scanning cycle for forming one layer in modeling. It can be realized.

  That is, the procedure for forming the layer 5a (n) shown in FIG. 6 will be described. A white ink for forming the portion 51 of the white layer while moving (scanning) the recording unit 10 shown in FIG. To form one layer with large ink droplets. At this time, the irradiator 12A near the white ink nozzle row W of the UV irradiator 12 shown in FIG. 2 is used to cure the ink. Then, the white ink for forming the portion 51 of the white layer is discharged to form one layer with large ink droplets, and at the same time, one layer of transparent ink and colored ink is formed with small ink droplets. This small drop can form the lower half of each of the portion 52 of the first transparent layer, the portion 53 of the colored layer, and the portion 54 of the second transparent layer of layer 5a (n) of FIG. . At this time, the irradiator 12A near the nozzle row that discharges the transparent ink and the coloring ink is used to cure these inks.

  Then, while moving (scanning) the recording unit 10 shown in FIG. 2 in the Y-axis direction, small ink droplets of the transparent ink and the coloring ink are deposited on the deposit of the lower half transparent ink and the coloring ink formed earlier. Form to form one layer. This one layer forms the upper half of each of the portion 52 of the first transparent layer, the portion 53 of the colored layer, and the portion 54 of the second transparent layer of the layer 5a (n) of FIG. Also at this time, the irradiator 12A close to the nozzle row that discharges the transparent ink and the colored ink is used to cure these inks. In the scan forming the upper half, the recording unit 10 passes over the portion 51 of the white layer previously formed by the large ink droplets. However, during this passage, the white ink is not dropped from the recording unit 10 to the portion 51 of the white layer.

  Up to here, the layer 5a (n) shown in FIG. 6 can be formed.

  Then, white ink for forming a portion 51 of the white layer while moving (scanning) the recording unit 10 shown in FIG. 2 in the Y-axis direction to form the layer 5a (n + 1) shown in FIG. To form one layer with large ink droplets. At this time, the irradiator 12A near the white ink nozzle row W of the UV irradiator 12 shown in FIG. 2 is used to cure the ink. Then, the white ink for forming the portion 51 of the white layer is discharged to form one layer with large ink droplets, and at the same time, one layer of transparent ink and colored ink is formed with small ink droplets. This small drop can form the lower half of each of the portion 52 of the first transparent layer, the portion 53 of the colored layer, and the portion 54 of the second transparent layer of layer 5a (n + 1) of FIG. . At this time, the irradiator 12A near the nozzle row that discharges the transparent ink and the coloring ink is used to cure these inks.

  Then, while moving (scanning) the recording unit 10 shown in FIG. 2 in the Y-axis direction, small ink droplets of the transparent ink and the colored ink are formed on the deposit of the lower half transparent ink and the colored ink previously formed. Then form one layer. This one layer forms the upper half of each of the portion 52 of the first transparent layer, the portion 53 of the colored layer, and the portion 54 of the second transparent layer of the layer 5a (n + 1) of FIG. Also at this time, the irradiator 12A close to the nozzle row that discharges the transparent ink and the colored ink is used to cure these inks. Also in the scan forming the upper half, the recording unit 10 passes above the portion 51 of the white layer previously formed by the large ink droplets. However, during this passage, the white ink is not dropped from the recording unit 10 to the portion 51 of the white layer.

  Up to here, the layer 5a (n + 1) is stacked on the layer 5a (n) shown in FIG.

  Incidentally, the shaping ink for forming the portion 50 of the shaping layer not shown in FIG. 6 and the support ink for forming the portion 55 of the support layer are both white ink for forming the portion 51 of the white layer The same ink droplet size is used.

  The above is the procedure of the second operation mode in which the colored portion is formed simultaneously with the formation of the formed object. In the second operation mode, the portion 52 of the first transparent layer constituting the colored portion, the portion 53 of the colored layer, and the second transparency, rather than the portion of the shaping layer constituting the shaped article and the portion 51 of the white layer The small ink droplet of the portion 54 of the layer can increase the ink resolution of the colored portion, and can express full color with high definition, and in particular, it has the merit of being able to express well even in halftone tones. is there.

  As shown in FIG. 6, the coloring ink (yellow ink nozzle row Y, magenta ink nozzle row M, cyan ink nozzle row C, black ink nozzle row K) is used for the part 53 of the colored layer. 2), and the transparent ink ejected from the transparent ink nozzle row CL shown in FIG. 2 is also deposited. Note that the transparent ink does not necessarily have to be deposited on a portion 53 of the colored layer.

  Also, not only the portion 53 of the colored layer, but also the portion 52 of the first transparent layer and the portion 54 of the second transparent layer are formed with small ink droplets, thereby reducing surface roughness and providing gloss. it can. This is particularly advantageous for the formation of the second transparent layer 4 that constitutes the outermost layer of the three-dimensional structure 5.

(2-4) First Operation Mode In the first operation mode, the size of the ink droplet of the portion 51 of the white layer described above, the portion 50 of the shaped layer of each layer 5a shown in FIG. 4, the portion of the white layer 51 and only a portion 55 of the support layer.

  That is, to explain using a part of FIG. 6, in the first operation mode, white ink is ejected to form one layer of large ink droplets to form a portion 51 of the white layer of the layer 5a (n). Form. Similarly, the forming ink for forming a part of the forming layer is also discharged, and the supporting ink for forming the part 55 of the support layer is also discharged to form one layer of ink droplets of the same size as the white ink. At this time, the irradiator 12A near the nozzle row W for white ink and the nozzle row CL for transparent ink in the UV irradiation unit 12 shown in FIG. 2 is used to cure these inks.

  Up to here, the layer formed in the first operation mode corresponding to the layer 5a (n) of FIG. 6 is completed.

  Then, subsequently, a portion 51 of the white layer (including a portion of the shaping layer) which is a portion of the layer 5a (n + 1) of FIG. 6 is formed on the portion of the layer 5a (n) of FIG. Form. Also at this time, white ink is discharged to form one layer with large ink droplets. Similarly, the forming ink for forming a part of the forming layer is also discharged, and the supporting ink for forming the part 55 of the support layer is also discharged to form one layer of ink droplets of the same size as the white ink. Then, the irradiator 12A near the nozzle row W for white ink and the nozzle row SP for support ink in the UV irradiation unit 12 shown in FIG. 2 is used to cure these inks.

  It should be noted that if the color of the forming ink is acceptable without making the surface of the formed object white, the discharge of the white ink may not be performed, and only the forming ink and the support ink may be discharged. If it is an object, only the shaping ink may be discharged.

  Up to this point, it is possible to form a laminated structure corresponding to a part of the object among the laminated structures of the layers 5a (n) and 5a (n + 1) shown in FIG.

  As described above, according to the present embodiment, according to the purpose, the first operation mode in which ink droplets larger than the ink droplets used for forming the colored portion are deposited to form only the shaped object, and the formation of the shaped object And a second operation mode which also forms a colored portion. As a result, when only a shaped object is desired, the first operation mode may be selected, and even though only the shaped object is desired, the colored portion is not formed, and the degree of freedom in formation is increased. There is.

  Then, if only a shaped object is desired, it is not necessary to consider the color tone, and as described above, large ink droplets can be deposited and formed. This has the advantage that the object (the shaped object) can be completed relatively quickly.

  Furthermore, in the first operation mode, only the first inkjet head nozzle portion 11A and the irradiator 12A adjacent thereto in the recording unit 10 need to be operated, so the scanning distance in the Y direction is the second operation mode. It is less than half of the size, and modeling in a shorter time is possible.

  The control flow by the control unit 20 will be described below with reference to FIG.

  When the forming device 30 of the present embodiment is started, the setting unit 21 of the control unit 20 generates information indicating whether or not the first operation mode is selected (by the user) (step S1). This information is output to the first control unit 22.

  In the first control unit 22, based on the information acquired from the setting unit 21, if the information indicates that the first operation mode is selected (YES in FIG. 7), the three-dimensional object, The inkjet head 11 is controlled so as to form each layer (modeling area) with the large ink droplets described above by using the stacking method (step S2). At this time, the second control unit 23 also acquires the information from the setting unit 21. Then, based on the information, the second control unit 23 determines which irradiator 12A of the UV irradiation unit 12 is to be irradiated, and controls the UV irradiation unit 12.

  On the other hand, if the information acquired from the setting unit 21 is information indicating that the first operation mode is not selected (NO in FIG. 7), the colored portion is formed simultaneously with the object in the second operation mode. The inkjet head 11 is controlled as follows. At this time, the inkjet head 11 is formed so that a shaped area which is a part of a shaped object is formed by the above-described large ink droplets and that a colored area which is a part of the colored portion is formed by the above-described small ink droplets. Are controlled (step S3). At this time, the second control unit 23 also acquires the information from the setting unit 21. Then, based on the information, the second control unit 23 determines which irradiator 12A of the UV irradiation unit 12 is to be irradiated, and controls the UV irradiation unit 12.

  Note that in any operation mode, vertical movement (scanning) is performed along the Z axis every time a plurality of layer units are formed. The unit of the plurality of layers has a height (in the Z-axis direction) in the range of 100 μm to 2 mm, and preferably in the range of 200 μm to 1 mm.

  Here, with respect to the portion 51 of the white layer of one layer shown in FIG. 6, a portion of the first transparent layer, a portion of the colored layer and a portion of the second transparent layer constituting the colored portion The first control unit 22 may determine in advance whether or not to use 2 layers in 6).

  The thickness of the portion 51 of the white layer shown in FIG. 6, that is, the thickness (width in the Z-axis direction) of each layer 5a in FIG. 4 can be 5 μm to 100 μm, and the preferable range is It shall be 10 micrometers-50 micrometers.

  The control unit 20 may be realized by a logic circuit (hardware) formed in an integrated circuit (IC chip) or the like, or may be realized by software using a CPU (Central Processing Unit). In the latter case, the control unit 20 is a CPU that executes instructions of a program that is software that realizes each function, a ROM (Read Only Memory) in which the program and various data are readably recorded by a computer (or CPU) or A storage device (these are referred to as a "recording medium"), a RAM (Random Access Memory) for developing the program, and the like are provided. The object of the present invention is achieved by the computer (or CPU) reading the program from the recording medium and executing the program. As the recording medium, a “non-transitory tangible medium”, for example, a tape, a disk, a card, a semiconductor memory, a programmable logic circuit or the like can be used. The program may be supplied to the computer via any transmission medium (communication network, broadcast wave, etc.) capable of transmitting the program. The present invention can also be realized in the form of a data signal embedded in a carrier wave, in which the program is embodied by electronic transmission.

(3) Other Operation Modes In the above embodiment, the mode of switching between the two operation modes of the first operation mode and the second operation mode is described, but the present invention is not limited to this. Absent. For example, an operation mode (third operation mode) may be provided in which only a white ink is used to form only a shaped object. When realizing the third operation mode in the recording unit 10 shown in FIG. 2, the white ink ejected from the white ink nozzle row W included in the first inkjet head nozzle portion 11A is used as a forming material, It may be made to be a mode made to harden by irradiation machine 12A near 1 ink jet head nozzle part 11A. The third operation mode may be provided in addition to the first operation mode and the second operation mode described above, or may be provided instead of the first operation mode.

  In addition, an operation mode (fourth operation mode) may be provided in which only a transparent ink is used to form only a shaped object. When realizing the fourth operation mode in the recording unit 10 shown in FIG. 2, the transparent ink ejected from the transparent ink nozzle row CL included in the second inkjet head nozzle portion 11B is used as a forming material, May be cured by the irradiator 12A close to the second inkjet head nozzle portion 11B. The fourth operation mode may be provided in addition to the first and second operation modes (and the third operation mode) described above, or the first operation mode (or the third operation mode). In place of).

  In addition, an operation mode may be provided in which a shaped object is formed with a transparent ink and a colored portion is formed using the above-described colored ink (fifth operation mode). When realizing the fifth operation mode in the recording unit 10 shown in FIG. 2, the transparent ink ejected from the transparent ink nozzle row CL included in the second inkjet head nozzle portion 11B is used as a forming material, Is cured by the irradiator 12A close to the second inkjet head nozzle portion 11B, and the second ink jet head nozzle portion 11B uses the colored ink ejected from the other nozzle rows Y, M, C, K, It may be configured to be cured by the irradiator 12A near the ink jet head nozzle portion 11B. The fifth operation mode may be provided in addition to the first to fourth operation modes described above, or may be provided instead of the second operation mode.

(4) Others of Three-Dimensional Structure With respect to the three-dimensional structure 5, only the portions directly related to the characteristic configuration of the present invention have been described above. Thus, other configurations of the three-dimensional structure 5 shown in FIGS. 3 and 4 will be described below.

  The white layer 1 (part 51 of the white layer), the first transparent layer 2 (part 52 of the first transparent layer), the colored layer 3 (part 53 of the colored layer), and the second transparent layer Each of 4 (portion 54 of the second transparent layer) will be described.

● White layer 1 (part 51 of white layer)
The white layer 1 (a part 51 of the white layer) is a layer having light reflectivity, and has a light reflectivity capable of reflecting light in the entire region of visible light on the surface of the white layer 1 on at least the colored layer side. doing.

  The white layer 1 (part 51 of the white layer) can be formed from an ink (white ink) containing a white pigment. By forming from the white ink, light entering from the surface side of the three-dimensional structure in the white layer 1 via the colored layer 3 can be well reflected, and coloring by subtractive color mixing can be realized. In addition, even if it is not white, the layer formed from the ink which has light reflectivity, such as ink containing metal powder, may be sufficient.

Configuration of First Transparent Layer 2 (Part 52 of First Transparent Layer) The first transparent layer 2 (part 52 of the first transparent layer) is formed of a transparent ink.

  Here, the transparent ink may be any ink capable of forming a transparent layer having a light transmittance of 50% or more per unit thickness. If the light transmittance per unit thickness of the transparent layer is less than 50%, the transmission of light is disadvantageously prevented, which is undesirable because the object can not exhibit the desired color tone by subtractive color mixing. Preferably, an ink having a light transmittance of 80% or more per unit thickness of the transparent layer is used, and an ink having a light transmittance of 90% or more per unit thickness of the transparent layer is more preferably used .

  Coloring is achieved by disposing the first transparent layer 2 (portion 52 of the first transparent layer) between the white layer 1 (portion 51 of the white layer) and the colored layer 3 (portion 53 of the colored layer) It can be avoided that the colored ink forming the layer 3 and the ink forming the white layer 1 mix. Even if the colored ink forming the colored layer is mixed with the transparent ink forming the first transparent layer, the color of the colored layer 3 is not lost, so that the color tone is not adversely changed. Therefore, a shaped article having a desired color tone (decoration) in the colored layer 3 can be realized.

● Colored layer 3 (part 53 of the colored layer)
The ink used to form the colored layer 3 (portion 53 of the colored layer) includes a colored ink containing a colorant.

  Examples of colored inks include yellow (Y), magenta (M) and cyan (C), black (K), and light inks of each color, but are not limited thereto, red (R), green (G), blue (B), orange (Or) or the like may be added. It is also possible to use metallic, pearl or phosphor colors. One or more of these colored inks are used to express the desired color tone.

  By the way, the amount of colored ink used to form the first colored region 53a of the colored layer 3 (part 53 of the colored layer) varies depending on the desired (desired) color tone. Therefore, in the case of a light color tone of low density, the ink filling density of the first colored area 53a does not reach the predetermined ink filling density with coloring ink alone, and unevenness is formed in the height in the Z direction, X There may be a case where a recess without colored ink is formed along the Y direction. In any case, inconspicuous unevenness is generated in the shaped object formed by the lamination method as in the present embodiment, which is not preferable. In particular, in the vertical formation surface near the middle of the laminated structure shown in FIG. 1 (b), one cross section of the colored layer 3 is a total of four ink droplets of two ink droplets in each of the vertical and horizontal directions in the ink formation by the error diffusion method. In the case of the packing density, the number of colored inks is four drops at the maximum (highest density) and zero at the minimum (zero density, that is, white). In some cases, the quality is greatly impaired both in terms of modeling and tone.

  Therefore, in the present embodiment, the coloring layer 3 (filling ink) is applied to a portion where the ink filling density of the first coloring area 53a of the coloring layer 3 (part 53 of the coloring layer) does not satisfy the predetermined ink filling density. The filling density of the first colored area 53a of the portion 53) of the colored layer is compensated. That is, the first colored region 53a of the colored layer 3 (portion 53 of the colored layer) is formed so that the combined density (the number of ink droplets) of the colored ink and the compensating ink is constant. Thereby, generation | occurrence | production of the dent mentioned above can be avoided and the shape of the three-dimensional structure 5 can be modeled finely.

  Since the discharge amount of the colored ink and the impact position of each color ink configured in the colored ink are known in advance, the compensation amount and the compensation position (impact position) of the compensating ink can be determined in consideration of these. The determination can be made in an inkjet head device or controller 30 (FIG. 2) or other control means.

  In addition, since the surface formed by the first colored area 53a of the colored layer 3 becomes flat by compensating the ink filling density with the compensating ink, it is possible to give a glossy feeling.

  The supplemental ink may be any ink that does not adversely affect the color tone to be exhibited in the first colored region 53a of the colored layer 3 (part 53 of the colored layer), and an example is the first transparent layer 2 (first The transparent ink used in the portion 52) of the transparent layer and the second transparent layer 4 (the portion 54 of the first transparent layer) can be employed.

  In addition, although this embodiment demonstrates based on the colored layer 3, this invention is not limited to a colored layer, If it is a decoration layer, there will be no restriction | limiting in particular.

Configuration of Second Transparent Layer 4 (Part 54 of Second Transparent Layer) The second transparent layer 4 (part 54 of the second transparent layer) is a part of the first transparent layer 2 (first transparent layer). It is formed using the transparent ink described in part 52). The second transparent layer 4 and the first transparent layer 2 may be formed using the same kind of transparent ink, or may be formed using different kinds of transparent inks.

  The second transparent layer 4 not only has a function as a protective layer of the colored layer 3, but also in the present invention (this embodiment) adopting a lamination method, it is possible to closely manufacture a three-dimensional structure. It produces the advantageous effect of making it possible. That is, if the colored layer 3 constitutes the outermost layer of the three-dimensional structure 5, that is, if the portion 53 of the colored layer is located at the most end in the layer 5a having the portion 53 of the colored layer. There is a possibility that the colored layer 3 (part 53 of the colored layer) can not be formed with high accuracy. However, by forming the second transparent layer 4 (portion 54 of the second transparent layer) on the outermost layer of the three-dimensional structure 5 as in the present embodiment, the colored layer 3 (portion 53 of the colored layer) Can be contributed by the second transparent layer 4 (portion 54 of the second transparent layer) to provide the desired color tone.

  In addition, if the colored layer 3 constitutes the outermost layer of the three-dimensional structure 5, the colored layer 3 is exposed, so it is likely to cause discoloration due to rubbing or fading due to ultraviolet light. However, since the second transparent layer 4 (the portion 54 of the second transparent layer) is formed on the outermost layer of the three-dimensional structure 5 as in the present embodiment, it is possible to prevent discoloration and discoloration. .

[Additional matters]
The forming apparatus 30 according to an aspect of the present invention is an apparatus for forming a three-dimensional structure in which a three-dimensional structure having a shaped object and a colored portion coloring the surface of the shaped object is formed by lamination. A first operation mode of forming only the shaped object, and a second operation mode of full-coloring the surface of the shaped object based on input data simultaneously with the formation of the shaped object; A control unit 20 is provided to switch between the mode and the second operation mode.

  According to the above configuration, by providing the control unit 20, the operation mode is switched between the case where the user only needs modeling and the case where the three-dimensional structure on which the coloring of the surface of the model is also desired is desired. Can.

  Further, for example, when the ink resolution used for full color coloring in the second operation mode is relatively small (fine), it is not necessary to consider the color tone, and only the formation may be performed. It is possible to build using an ink resolution greater than the ink resolution. In this case, when the first operation mode is selected, there is an effect that a shaped object can be formed quickly.

  A forming apparatus 30 according to an embodiment of the present invention further includes an inkjet head 11 in addition to the above-described configuration, and the inkjet head 11 discharges a forming material for the formation and a coloring material for the coloring. Stack the layers formed by

  Further, in addition to the above-described configuration, the forming apparatus 30 according to an aspect of the present invention is to form a plurality of the colored layers in the period of the scanning cycle for forming one layer in the modeling. Scan the

  According to the above configuration, the ink resolution of the full-color-colored portion becomes finer than that of the portion of the modeling where it is not necessary to consider the color tone. Thereby, a halftone color tone can be favorably exhibited in the full-color colored portion.

  Further, in addition to the above configuration, the forming apparatus 30 according to an aspect of the present invention is for forming a plurality of transparent protective layers within the time of the scanning cycle for forming one layer in the above-mentioned formation. Perform a scan.

  According to the above configuration, the surface roughness of the transparent protective layer can be reduced, and gloss can be provided.

  Further, in addition to the above-described configuration, the forming apparatus 30 according to an embodiment of the present invention uses an ultraviolet curable ink as the modeling material and the coloring material.

  According to the above configuration, by using the ultraviolet curable ink as the modeling material and the coloring material, it can be cured in a short time, so it is easy to stack, and the target object (the shaped object, the three-dimensional structure) It can be formed in a short time.

  Further, in addition to the above-described configuration, the forming apparatus 30 according to an aspect of the present invention includes a first ink jet head nozzle unit 11A that discharges the above-described forming material, and a second ink jet head nozzle unit 11B that discharges the above coloring material. The plurality of irradiators 12A having a light source for curing the ink, and the plurality of irradiation units 12A sandwich the first ink jet head nozzle unit 11A and the second ink jet head nozzle unit 11B in the scanning direction. It is arranged as.

  According to the above configuration, since the irradiation unit is disposed so as to sandwich the first inkjet head nozzle unit and the second inkjet head nozzle unit in the scanning direction, the dropped ink is efficiently cured. be able to.

  The present invention is not limited to the above-described embodiments, and various modifications can be made within the scope of the claims, and embodiments obtained by appropriately combining the technical means disclosed in the different embodiments. Is also included in the technical scope of the present invention.

  The present invention is applicable to any forming apparatus that forms three-dimensional structures.

M modeling layer S support layer 1 white layer 2 first transparent layer 3 colored layer 4 second transparent layer 5 three-dimensional structure 5 a layer 10 recording unit 11 inkjet head 11A first inkjet head nozzle portion 11B second inkjet head nozzle Unit 12 UV irradiation unit 12A Irradiator 13 Carriage 20 control unit (switching unit)
21 Setting unit (switching unit)
22 first control unit 23 second control unit 30 forming device 50 part of shaped layer 51 part of white layer 52 part of first transparent layer 53 part of colored layer 54 part of second transparent layer 55 part of support layer

Claims (6)

An apparatus for forming a three-dimensional structure, comprising forming a three-dimensional structure having a shaped object and a colored portion coloring the surface of the shaped object by lamination.
A recording unit that performs the above-described lamination by discharging ink while scanning in the scanning direction;
The recording unit includes a first ink jet head nozzle unit that discharges an ink for forming the shaped object, and a second ink jet head nozzle unit that discharges an ink that forms the colored portion.
An apparatus for forming a three-dimensional structure, wherein the first inkjet head nozzle unit and the second inkjet head nozzle unit are disposed at different positions in the scanning direction.   3. The third order according to claim 1, wherein the first inkjet head nozzle portion and the second inkjet head nozzle portion are disposed at the same position in a direction orthogonal to the scanning direction and the horizontal direction. Equipment for forming original structure. The ink for forming the shaped object and the ink for forming the colored portion are ultraviolet curable inks,
The apparatus for forming a three-dimensional structure according to claim 1 or 2, wherein the recording unit further includes a light source for curing the ink that cures the ultraviolet curable ink.   The apparatus for forming a three-dimensional structure according to claim 3, wherein a plurality of light sources for curing the ink are disposed in the scanning direction, and the irradiation intensities of the respective light sources are different.   The light source for curing the ink includes a curing light source disposed so as to be sandwiched between the first inkjet head nozzle portion and the second inkjet head nozzle portion in the scanning direction. The formation apparatus of the three-dimensional structure as described in 3 or 4. A control unit configured to control discharge of the first inkjet head nozzle unit and the second inkjet head nozzle unit;
The control unit uses a first operation mode in which modeling is performed using only the first inkjet head nozzle unit based on input data, and the first inkjet head nozzle unit and the second inkjet head nozzle unit. The apparatus for forming a three-dimensional structure according to any one of claims 1 to 5, characterized in that it can be switched to a second operation mode for forming a shape.

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