JP6502153B2 - Three-dimensional modeling apparatus and three-dimensional modeling method - Google Patents

Description

  The present invention relates to a three-dimensional modeling apparatus and a three-dimensional modeling method, and more particularly to a three-dimensional modeling apparatus and a three-dimensional modeling method for producing a three-dimensional model using powder as a raw material.

  Conventionally, a powder adhering and laminating method is known as a method of producing a three-dimensional structure using powder as a raw material.

  About the three-dimensional modeling apparatus by such a powder adhering and laminating system, it is indicated by patent documents 1, for example.

  That is, in the three-dimensional modeling apparatus according to the technology disclosed in Patent Document 1, first, the powder material is spread in a modeling tank for modeling a three-dimensional model to form a powder layer having a predetermined thickness.

  Next, a binder for curing the powder material is discharged from the discharge head to the powder layer based on the image data of the cross-sectional shape of the three-dimensional structure, thereby forming a cross-sectional shape based on the image data in the powder layer. Do.

  Thereafter, a new powder layer of a predetermined thickness is formed on the powder layer in which the cross-sectional shape is formed, and from this discharge layer, based on image data representing the next cross-sectional shape of the formed cross-sectional shape The binder is discharged to form a cross-sectional shape based on the image data in the new powder layer.

Then, such processing is repeated to sequentially form cross-sectional shapes based on image data representing all cross-sectional shapes, thereby producing a three-dimensional structure.

  By the way, in a conventionally known three-dimensional modeling apparatus such as a three-dimensional modeling apparatus according to the technique disclosed in Patent Document 1, the cross-sectional shape is usually a surface layer forming the surface of the three-dimensional model and the inside of the cross-sectional shape It forms by the inner layer to form, and the intermediate | middle layer formed between surface layer and an inner layer (refer FIG. 13).

  The inner layer is formed by discharging a colorless binder at low density, and the middle layer is formed by discharging a colorless binder at high density, and the surface layer is formed of a colorless binder and a colored binder. Is formed by discharging the binder mixed at a high density.

The surface layer is formed so as to have a predetermined color by a colored binder so as to be colored and cured in order to reproduce the appearance of the three-dimensional structure to be produced. At this time, when color is not necessary for the three-dimensional structure to be produced, the surface layer is formed of only a colorless binder.

  In addition, in such a conventionally known three-dimensional modeling apparatus, in order to keep the quality of the three-dimensional model to be produced constant, it is necessary to continuously form the cross-sectional shape. For this reason, when producing a three-dimensional structure, it is judged whether the three-dimensional structure can be produced by the binder remaining in the three-dimensional structure forming apparatus.

  Specifically, first, the total amount of binder required to produce a three-dimensional object is calculated, and then the discharge amount of the colored binder is calculated, and then the total amount of binder and the discharge of the colored binder are calculated. The difference between the amount and the amount was calculated as the discharge amount of the colorless binder.

  Thereafter, the calculated discharge amount of each binder and the remaining amount of each binder obtained are compared to determine whether it is possible to produce a three-dimensional object.

If it is judged that the three-dimensional structure can be produced by this judgment, it becomes possible to start the production of the three-dimensional structure, and if it is judged that the three-dimensional structure can not be produced, a new cartridge and It was prompted to replace it.

  Thus, in the conventionally known three-dimensional modeling apparatus, when the three-dimensional model can not be produced, the user is only given the option to replace it with a new cartridge or stop three-dimensional modeling. However, it has been pointed out as a problem that the user's intention can not be reflected.

  The intention of the user is, for example, to produce a three-dimensional object which can be produced with the remaining amount of binder or the remaining amount of ink, such as ignoring the strength or changing the magnification to produce a three-dimensional object. It is.

Moreover, in the conventionally known three-dimensional modeling apparatus, if it is judged that the three-dimensional model can not be manufactured, the three-dimensional model can not be manufactured unless it is replaced with a new cartridge. It has been pointed out that raising costs is a problem.

  Then, in a conventionally known three-dimensional modeling apparatus, as a method for measuring the remaining amount of ink or binder, the remaining amount of ink or binder is measured in a sub tank provided between the cartridge and the ejection head. It has been known.

Specifically, in such a three-dimensional modeling apparatus, a binder or the like is supplied from the cartridge to the discharge head through the sub tank, and the configuration for measuring the remaining amount of each binder in the sub tank is Provided to obtain the remaining amount of binder.

  For this reason, in the conventionally known three-dimensional modeling apparatus, it is necessary to provide a space for the sub tank, and it has been pointed out that it is difficult to miniaturize the apparatus.

U.S. Patent No. 6989115

  The present invention has been made in view of the various problems of the prior art as described above, and an object of the present invention is to provide a three-dimensional shaping apparatus capable of suppressing cost increase. It is

  Another object of the present invention is to provide a three-dimensional modeling apparatus and a three-dimensional modeling method that can reflect the user's intention and can miniaturize the apparatus.

  In order to achieve the above object, a three-dimensional shaping apparatus according to the present invention comprises a binder for curing the powder material with respect to a powder layer formed with a predetermined thickness in a shaping tank by the powder material supplied. After the ink for coloring the material is ejected from the head to form a cross-sectional shape, a new powder layer is formed on the powder layer having the cross-sectional shape formed in the modeling tank, and the new powder layer is formed. In the three-dimensional modeling apparatus for producing a three-dimensional object by laminating the cross-sectional shape by repeatedly and repeatedly performing the operation of discharging the binder and the ink from the head to form the cross-sectional shape sequentially Creation means for creating cross-sectional shape data from three-dimensional data representing the three-dimensional shape of the three-dimensional object, the binder retained in the cartridge, and the remainder of the ink The binder and the ink are ejected with a preset ejection amount based on the acquiring unit for acquiring the ink, the binder and the remaining amount of the ink acquired by the acquiring unit, and the first created from the three-dimensional data When it is judged that it is impossible to manufacture a three-dimensional structure by the judging means for judging whether it is possible to manufacture a three-dimensional structure based on the cross-sectional shape data of Screen display means for displaying a selection screen capable of selecting a three-dimensional structure by thinning out the binder and the ink, or reducing the size of the three-dimensional structure; When it is selected to produce a three-dimensional structure by thinning out, the discharge amounts preset for the binder and the ink which run short are thinned out, When it is selected that the three-dimensional object be produced by reducing the size of the three-dimensional object on the selection screen and the selection screen for determining the post-discharge amount, the above-mentioned binder and the ink having the largest shortage amount are the largest. The reduction means for determining the reduction ratio of the three-dimensional structure based on the binder and the remaining amount of the ink, and reducing the three-dimensional data based on the determined reduction ratio; The first cross-sectional shape data is created based on the data, and the second cross-sectional shape data is created based on the three-dimensional data reduced by the reduction means, and the control means uses the thinning-out means When the ejection amount after thinning is determined, the binder and the ink for which the ejection amount after thinning is determined are used as the ejection amount after thinning, and the first cross-sectional shape data When the three-dimensional data is reduced by the reduction means while controlling the head based on the above, the binder and the ink are set as discharge amounts set in advance, and the head is made based on the second cross-sectional shape data. To control the

  In the three-dimensional modeling apparatus according to the present invention, in the above-described three-dimensional modeling apparatus, the ink is an aqueous pigment ink.

  Further, the three-dimensional shaping apparatus according to the present invention is a colored binder for coloring the powder material and a colorless binder for curing the powder material with respect to a powder layer formed with a predetermined thickness in the shaping tank by the supplied powder material. After the binder is discharged from the head to form a cross-sectional shape, a new powder layer is formed on the powder layer having the cross-sectional shape formed in the modeling tank, and the colorless binder is formed on the new powder layer. And a three-dimensional modeling apparatus for producing a three-dimensional structure by laminating the cross-sectional shape by repeatedly and repeatedly performing the operation of discharging the colored binder from the head to form the cross-sectional shape Means for creating cross-sectional shape data from three-dimensional data representing the three-dimensional shape of the toner; The colorless binder and the colored binder are discharged at a preset discharge amount based on an acquiring unit for acquiring the remaining amount of the binder, and the residual amounts of the colorless binder and the colored binder acquired by the acquiring unit, and It is not possible to produce a three-dimensional object by the judging means for judging whether it is possible to produce a three-dimensional object based on the first cross-sectional shape data created from the three-dimensional data, and If it is judged that it is possible, a selection screen is displayed which allows selection of thinning out the three-dimensional structure or thinning out the three-dimensional structure by thinning the colorless binder and the color binder. When it is selected that the three-dimensional structure is to be thinned out on the screen display means and the selection screen, the colorless binder and With regard to the colored binder, thinning means for determining the discharge amount after thinning by thinning out the discharge amount set in advance, and when it is selected to manufacture a three-dimensional object by reduction on the selection screen, it is insufficient The reduction ratio of the three-dimensional structure is determined based on the remaining amount of the colorless binder and the colored binder which are the largest among the colorless binder and the colored binder, and the three-dimensional shape is determined based on the determined reduction ratio. Data reduction means for reducing data, the generation means generating the first cross-sectional shape data based on the three-dimensional data, and based on the three-dimensional data reduced by the reduction means. The second cross-sectional shape data is created, and the control means determines the discharge amount after thinning when the discharge amount after thinning is determined by the thinning means. The above-mentioned colorless binder and the above-mentioned colored binder are used as the discharge amount after the thinning, the above-mentioned head is controlled based on the above-mentioned first cross-sectional shape data, and the above-mentioned reducing means reduces the above three-dimensional data. The colorless binder and the colored binder are used as discharge amounts set in advance, and the head is controlled based on the second cross-sectional shape data.

  Further, in the three-dimensional modeling apparatus according to the present invention, in the three-dimensional modeling apparatus described above, the three-dimensional modeling apparatus further includes a measuring unit that is disposed in the storage unit and measures the weight of each binder and the cartridge in which the ink is stored. The acquisition unit subtracts the weight of the empty cartridge from the weight measured by the measurement unit to acquire the remaining amount of the binder and the ink.

  Further, in the three-dimensional modeling apparatus according to the present invention, in the three-dimensional modeling apparatus described above, the remaining amounts of the binder and the ink acquired by the acquiring unit, and first cross-sectional shape data created from the three-dimensional data. And calculating means for calculating how many cross-sectional shapes can be formed based on the first cross-sectional shape data based on the binder and the ejection amount of the ink set in advance. The determination means discharges the binder and the ink by a preset discharge amount based on the number of layers in the cross-sectional shape calculated by the calculation means, and three-dimensional modeling is performed based on the first cross-sectional shape data. It is made to judge whether it is possible to produce an object.

  Further, in the three-dimensional modeling apparatus according to the present invention, in the three-dimensional modeling apparatus described above, the cross-sectional shape formed based on the cross-sectional shape data is formed by a three-layer structure of an inner layer, an intermediate layer, and a surface layer. When determining the discharge amount after thinning out the binder, the discharge amount in the inner layer is thinned out preferentially over the discharge amounts in the middle layer and the surface layer, and the discharge amount in the middle road is prioritized over the discharge amount in the surface layer It is something to be thinned out.

  In the three-dimensional shaping method according to the present invention, a binder for curing the powder material and an ink for coloring the powder material with respect to a powder layer formed with a predetermined thickness in the shaping tank by the powder material supplied. After forming a cross-sectional shape by discharging from the head, a new powder layer is formed on the powder layer on which the cross-sectional shape is formed in the modeling tank, and the binder and the ink for the new powder layer are formed. 3D modeling method of producing a three-dimensional structure by a three-dimensional modeling apparatus that stacks cross-sectional shapes to produce a three-dimensional structure by repeatedly and repeatedly performing an operation of forming a cross-sectional shape by discharging the In the first creation step of creating first cross-sectional shape data from three-dimensional data representing the three-dimensional shape of the three-dimensional structure to be created; The binder and the ink are discharged with a preset discharge amount based on the binder and the acquiring step of acquiring the remaining amount of the ink, and the binder and the remaining amount of the ink acquired in the acquiring step. It is determined that it is impossible to create a three-dimensional object in the determination step of determining whether it is possible to produce a three-dimensional object based on the first cross-sectional shape data and the above determination step An image display step of displaying a selected image that can be selected to thin out the binder and the ink to produce a three-dimensional structure, or to reduce the three-dimensional structure to be manufactured; If it is selected to make a three-dimensional object by thinning out, the ejection amount set in advance is thinned out for the insufficient binder and the ink. In the thinning step of determining the ejection amount after thinning, and in the selection screen, it is selected that the three-dimensional object is to be produced by reducing the size, the largest amount of the binder and the ink which are insufficient will be the largest. The reduction rate of the three-dimensional object is determined based on the remaining amount of the binder and the ink, and the reduction process for reducing the three-dimensional data based on the determined reduction rate, and the ejection amount after thinning in the thinning step are determined. And controlling the head based on the first cross-sectional shape data, using the binder and the ink for which the ejection amount after thinning is determined as the ejection amount after the thinning, and When the three-dimensional data is reduced in the reduction step, a second creation step of creating second cross-sectional shape data from the reduced three-dimensional data, and the second creation step are performed. When the second cross-sectional shape data is created, the binder and the ink are set to predetermined discharge amounts, and a second control step of controlling the head based on the second cross-sectional shape data is performed. The three-dimensional shaping apparatus is to be executed.

  Since the present invention is configured as described above, the present invention has an excellent effect that cost increase can be suppressed.

  In addition, since the present invention is configured as described above, it is possible to reflect the user's intention and to achieve the excellent effect that the device can be miniaturized.

FIG. 1 is a schematic perspective view of a three-dimensional modeling apparatus according to the present invention. FIG. 2: is explanatory drawing showing the end surface of the cut surface by the II line of FIG. FIG. 3 (a) is an explanatory view simply showing a state in which each cartridge in which the binder and the ink are stored is stored in the cartridge storage portion, and FIG. 3 (b) (c) is a cartridge storage portion 12 is an explanatory view showing a configuration capable of measuring the weight of the cartridge. FIG. 4 is an explanatory view schematically showing the configuration of the discharge head. FIG. 5 is a block diagram showing the functional configuration of the microcomputer. FIG. 6 is a flowchart showing the detailed processing contents of the three-dimensional modeling process. FIG. 7 is a flowchart showing the detailed processing contents of the process of determining the ejection amount after thinning. FIG. 8 is a flowchart showing the detailed processing content of the discharge amount determination processing after thinning the binder. FIG. 9 is a flowchart showing the detailed processing content of the ejection amount determination processing after thinning out the ink. FIGS. 10 (a) and 10 (b) are explanatory views for explaining the operation of each component at the time of three-dimensional modeling by the three-dimensional modeling apparatus according to the present invention. 11 (a) and 11 (b) are explanatory views for explaining the operation of each component at the time of three-dimensional modeling by the three-dimensional modeling apparatus according to the present invention. 12 (a) and 12 (b) are explanatory views for explaining the operation of each component at the time of three-dimensional modeling by the three-dimensional modeling apparatus according to the present invention. Drawing 13 is an explanatory view explaining the layer formed in the section shape of the three-dimensional fabrication thing produced.

Hereinafter, an example of an embodiment of a three-dimensional modeling apparatus and a three-dimensional modeling method according to the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 is a schematic structural view of a three-dimensional shaping apparatus according to the present invention, and FIG. 2 is a cross-sectional view taken along the line II of FIG.

  In the base member 12, the storage tank 14 for storing powder material and the powder material supplied from the storage tank 14 are filled in the base member 12 of the three-dimensional structure forming apparatus 10 shown in FIG. A formation tank 16 is formed, and a storage tank 18 is provided which contains powder material which can not be completely filled in the formation tank among the powder materials supplied from the storage tank 14 to the formation tank 16.

  The three-dimensional modeling apparatus 10 is fixedly disposed on the movable member 20 movably disposed in the Y-axis direction on the upper surface 12a of the base member 12 and the movable member 20, and the binder and the ink are stored. The cartridge accommodating portion 22 for accommodating the cartridge, and the binder and the ink supplied from the cartridge accommodated in the cartridge accommodating portion 22 so as to be movable in the X axis direction in the moving member 20, and the supplied binder and An ejection head 24 for ejecting ink and a roller 26 disposed on the front side of the ejection head 24 in the moving member 20 are provided.

  The overall operation of the three-dimensional modeling apparatus 10 is controlled by the microcomputer 28.

  More specifically, the storage tank 14, the modeling tank 16, and the storage tank 18 are juxtaposed along the Y-axis in the XYZ orthogonal coordinate system, and from the rear side to the front side, the storage tank 14, the modeling tank 16 and the storage tank 18 are arrange | positioned in order in order.

  The storage tank 14 has a lift plate 21 disposed therein, and the lift plate 21 is configured to be able to move up and down inside the storage tank 14 by a motor (not shown).

  And in the storage tank 14, in the state in which the powder material was stored inside, when the raising / lowering board 21 raises, the stored powder material is raised and, thereby, a predetermined amount of powder material is raised from the opening part 14a. It will Incidentally, the powder material of the predetermined amount thus raised from the opening 14a is pushed forward from the rear side to the front side by the roller 26 as the moving member 20 moves the Y-axis direction from the rear side to the front side. It will be supplied to the modeling tank 16 located on the front side.

Therefore, in the storage tank 14, the microcomputer 28 controls the elevation plate 21 to be lowered when storing the powder material, and controls the elevation plate 21 to rise when the powder material is supplied.

  An elevator plate 30 is disposed inside the modeling tank 16, and the elevator plate 30 can move up and down inside the modeling tank 16 by a motor (not shown).

  And the modeling tank 16 forms the space which can be filled with the powder material of predetermined amount in the modeling tank 16 by lowering | hanging the raising / lowering board 30 located in the initial position which is the same height position as the opening part 16a.

In the space thus formed, a predetermined amount of powder material pushed forward from the rear side to the front side by the roller 26 is filled, whereby the powder material is supplied from the storage tank 14 to the modeling tank 16. It becomes.

  The storage tank 18 is designed such that the opening 18a is located at the same height position as the opening 14a and the opening 16a or at a height position slightly lower.

Then, among the powder material of a predetermined amount pushed forward from the rear side to the front side by the roller 26, the powder material which can not be filled in the modeling tank 16 is accommodated in the accommodation tank 18 from the opening 18a.

  The moving member 20 includes an extending member 20-1 extending in the X-axis direction, and side members 20-2 and 20-3 disposed on the right side surface and the left side surface of the extending member 20-1. It is configured to have.

  The side members 20-2 and 20-3 are slidably disposed on a pair of guide rails 32 extending along the Y-axis direction on the upper surface 12 a of the base member 12.

Thus, the moving member 20 is configured to be movable in the Y-axis direction along the pair of guide rails 32.

  The cartridge housing portion 22 is fixedly disposed on the rear surface 20-1a of the extending member 20-1 in the moving member 20, and is colorless (that is, transparent) for curing the powder material stored in the storage tank 14 A cartridge 40 for storing the binder, a cartridge 42 for storing the C (cyan) ink, a cartridge 44 for storing the M (magenta) ink, and a cartridge 46 for storing the Y (yellow) ink, It is possible to store a cartridge 48 for storing K (black) ink (refer to FIG. 3A).

  Here, the C (cyan) ink stored in the cartridge 42, the M (magenta) ink stored in the cartridge 44, the Y (yellow) ink stored in the cartridge 46, and the K (ink) stored in the cartridge 48 The black) ink is an aqueous pigment ink in which a pigment is dispersed in a water-based solvent, and it is impossible to cure powder materials with only these inks.

  As such an aqueous pigment ink, for example, a highly versatile and relatively inexpensive ink used for an ink jet printer and the like can be used.

  Further, in the cartridge housing portion 22, a measuring mechanism for measuring the remaining amount of the binder and the ink to be stored is provided for each of the cartridges 40, 42, 44, 46, 48.

  Specifically, the measuring mechanism is disposed on the bottom surface 22a of the cartridge housing 22 at a predetermined distance from the pivoting unit 50 pivotably disposed on the bottom surface 22a of the cartridge accommodation unit 22 by a hinge or the like. And a support member 54 provided upright on the weight sensor 52 for supporting the cartridge (see FIG. 3B). The pivoting portion 50 has a shape that can fix the cartridge.

  In the case of such a configuration, the lower end portion of the front side of the cartridge (that is, the side provided with the outflow hole for flowing out the binder or the ink stored in the cartridge) is the rotating portion 50 While being attached, the rear bottom surface of the cartridge is placed on the support member 54.

  Further, the measuring mechanism may be provided with a weight sensor 58 provided with a storage stage 56 capable of storing the cartridge on the bottom surface 22a of the cartridge storage section 22 (see FIG. 3C).

In the case of such a configuration, the cartridge is simply accommodated in the accommodation stage 56.

  The ejection head 24 is slidably disposed on a guide rail extending in the X-axis direction on the front surface of the extending member 20-1 in the moving member 20, and is movable in the X-axis direction in the extending member 20-1. The configuration is as follows.

  Therefore, the discharge head 24 can move in the X-axis direction above the upper surface 12 a of the base member 12 and can move in the Y-axis direction via the moving member 20.

  The lower surface 24 a of the discharge head 24 is the opening 14 a of the storage tank 14, the opening 16 a of the modeling tank 16, and the storage tank 18 when moving the upper side of the upper surface 12 a in the X axis direction and the Y axis direction. The extending member 20-1 is disposed so that the lower surface 24a is at a higher height position than each opening so that the opening 18a is not in contact with the opening 18a, and each opening and the lower surface 24a have a height A predetermined interval is provided in the direction (Z-axis direction).

  Further, the ejection head 24 is supplied with a head 60 to which a colorless binder is supplied from the cartridge 40, a head 62 to which C (cyan) ink is supplied from the cartridge 42, and M (magenta) ink from the cartridge 44 , A head 66 to which Y (yellow) ink is supplied from the cartridge 46, and a head 68 to which K (black) ink is supplied from the cartridge 48 (see FIG. 4). ).

  The subtank is not disposed between the cartridge and the head, and the binder and the ink are supplied from each cartridge to each head through the tube. At this time, as a method of supplying the binder and the ink through the tube, since a conventionally known technique can be used, the detailed description thereof will be omitted.

  The lower surface 24 a of the ejection head 24 is supplied with the nozzle 60 a for ejecting the colorless binder supplied to the head 60, the nozzle 62 a for ejecting C (cyan) ink supplied to the head 62, and the head 64. Nozzles 64a for ejecting M (magenta) ink, nozzles 66a for ejecting Y (yellow) ink supplied to the head 66, and nozzles for ejecting K (black) ink supplied to the head 68 68a are arranged (see FIG. 4).

  With such a configuration, the discharge head 24 moves in the X-axis direction without contacting the storage tank 14, the modeling tank 16 and the storage tank 18 with the upper side of the upper surface 12a of the base member 12 via the moving member 20. It is possible to move in the Y-axis direction.

The ejection head 24 ejects the binder and the ink by an inkjet method.

  The roller 26 is disposed on the front side of the discharge head 24 in the moving member 20 so as to extend along the X-axis direction.

  Further, the roller 26 is slightly smaller than the opening 14a and the opening 16a in the height direction (Z-axis direction) (that is, from the predetermined interval formed by the openings 14a and 16a and the lower surface 24a of the ejection head 24). Is also disposed at the upper side to a small value.

  Accordingly, the roller 26 is movable in the Y axis direction via the moving member 20.

  As a result, when the roller 26 moves from the rear to the front side via the moving member 20, the roller 26 rotates in the direction of arrow A, whereby the lifting plate 21 in the storage tank 14 moves upward to the upper side of the opening 14a. The raised powder material is pushed forward from the rear side by the roller 26, and the extruded powder material is filled in the shaping tank 16. At this time, the powder material that could not be filled in the modeling tank 16 is accommodated in the accommodation tank 18 as the roller 26 moves from the rear side to the front side.

Furthermore, the roller 26 is configured to be rotatable around the central axis of the roller 26 parallel to the X axis. The rotation of the roller 26 is performed when the moving member 20 moves in the Y-axis direction.

  The microcomputer 28 calculates the number of layers (cross-sectional shape) that can be formed from the binder and the ink in the cartridge, in addition to basic control of each component for three-dimensional modeling, or based on the user's choice. Control is performed to produce a three-dimensional structure that can be made with the binder and ink in the cartridge.

  Here, the functional configuration of the microcomputer 28 will be described with reference to FIG.

  The microcomputer 28 creates the cross-sectional shape data from the three-dimensional data and the storage unit 70 in which various information such as the binder and the discharge amount of ink and the three-dimensional data representing the three-dimensional shape of the three-dimensional structure are stored. A control unit 72 that controls each component for a three-dimensional object based on the setting information stored in the storage unit 70 and the setting information stored in the storage unit 70; a binder in the cartridge; And a setting change unit 74 configured to change setting information for producing a three-dimensional structure in accordance with the calculation of the ink.

The setting information includes the discharge amount of the binder from the ink head 40 in the inner layer, the intermediate layer and the surface layer of the three-dimensional structure to be manufactured, and the discharge amounts of the inks from the ink heads 42, 44, 46, and 48 in the surface layer. It is information for controlling the operation of each component included.

  The creation unit 71 creates cross-sectional shape data representing cross sections obtained by cutting three-dimensional data representing the three-dimensional shape of the three-dimensional structure to be manufactured at predetermined intervals in the horizontal direction, for example, every 30 μm.

  Specifically, the creation unit 71 creates basic cross-sectional shape data from the three-dimensional data stored in the storage unit 70, and reduces the cross-sectional shape data from the three-dimensional data reduced by the reduction unit 86 (described later). Will be created.

Each cross-sectional shape data created in this way is sequentially numbered, and the control of the control unit 72 forms a three-dimensional object by forming a cross-sectional shape based on the cross-sectional shape data in the order of this number. The Rukoto.

In addition, the setting change unit 74 acquires the weight of the binder and the ink from the weight of each cartridge measured by the weight sensor 52 (58), the acquired weight, and the basic created by the creation unit 71. Whether the number of layers calculated by the number-of-layers calculation unit 78 that calculates the number of layers that can be formed from the cross-sectional shape data and the number of layers calculated by the number of layers calculation unit 78 is smaller than the number of basic cross-sectional shape data generated by the generation unit 71 If the number of layers calculated by the number-of-layers calculation unit 78 is determined to be smaller than the number of basic cross-sectional shape data by the determination unit 80 that makes the determination of In the screen display unit 82 for displaying on the display device (not shown) a selection screen for selecting whether to manufacture the original three-dimensional object or to reduce the three-dimensional object, and thinning by the user on the selection screen When it is selected to produce, it is selected that the user shrinks and produces a three-dimensional structure by the thinning section 84 for thinning out all ejection amounts of binder and ink which are lacking at the time of three-dimensional formation and the selection screen. In this case, the reduction unit 86 is provided to reduce three-dimensional data in accordance with the binder or ink having the largest shortage amount among the insufficient binder and ink.

  More specifically, the acquisition unit 76 subtracts the weight (prestored in advance) of the empty cartridge that is tared from the weight (including the stored ink) in each cartridge measured by the weight sensor 52 (58). And the calculated value is obtained as the weight of the binder and the ink.

  That is, the acquisition unit 76 subtracts the weight of the empty cartridge from the weight of the cartridge 40 measured by the weight sensor 52 (58) to acquire the remaining amount of the binder stored in the cartridge 40.

  Further, the weight of the empty cartridge is subtracted from the weight of the cartridge 42 measured by the weight sensor 52 (58), and the remaining amount of C (cyan) ink stored in the cartridge 42 is acquired.

  Further, the weight of the empty cartridge is subtracted from the weight of the cartridge 44 measured by the weight sensor 52 (58) to acquire the remaining amount of M (magenta) ink stored in the cartridge 44.

  Further, the weight of the empty cartridge is subtracted from the weight of the cartridge 46 measured by the weight sensor 52 (58) to acquire the remaining amount of Y (yellow) ink stored in the cartridge 46.

Further, the weight of the empty cartridge is subtracted from the weight of the cartridge 48 measured by the weight sensor 52 (58) to acquire the remaining amount of K (black) ink stored in the cartridge 48.

  The layer number calculation unit 78 can be formed at the time of three-dimensional modeling from the weight acquired by the acquisition unit 76, the basic cross-sectional shape data created by the creation unit 71, and the binder and ink discharge amounts set as initial settings. Calculate the number of layers.

  That is, in this layer number calculation unit 78, first, the cross section based on the first basic cross-sectional shape data representing the cross-sectional shape based on the first basic cross-sectional shape data by the remaining amount acquired by the acquisition unit 76 Among the layers up to the final layer representing the shape, the number of layers that can be formed with the ejection amount set in the initial setting is calculated. The amount of binder and ink used in each cross-sectional shape formed based on basic cross-sectional shape data is the volume of the inner layer, intermediate layer and surface layer in each basic cross-sectional shape data, and the discharge amount of binder in the inner layer, intermediate layer and surface layer Calculated from etc. Furthermore, the discharge amounts of the binder and ink set as initial settings are the discharge amounts of the binder in the inner layer, the intermediate layer and the surface layer, and the discharge amounts of the ink in the surface layer, which are preset as conditions for performing three-dimensional modeling. is there.

  In addition, for the ink of C (cyan), the ink of M (magenta), the ink of Y (yellow) and the ink of K (black), depending on the remaining amount acquired by the acquiring unit 76, from the first layer to the final layer Among them, the number of layers capable of forming the cross-sectional shape is calculated with the discharge amount set in the initial setting.

When calculating the number of layers, the number-of-layers calculating unit 78 ends the calculation process when the predetermined number of layers from the first layer to the final layer is calculated. That is, assuming that the final layer is the 50th layer, the calculation process ends when the calculated number of layers reaches 50.

  The determination unit 80 determines whether the number of layers calculated by the number-of-layers calculation unit 78 is smaller than the number of basic cross-sectional shape data of the three-dimensional structure, and from the determination result, the creation unit 71 creates Based on the basic cross-sectional shape data and the discharge amount set in the initial setting, it is determined whether it is possible to produce a three-dimensional structure.

  That is, the determination unit 80 determines that the number of layers calculated by the layer number calculation unit 78 reaches a predetermined number of layers from the first layer based on the first basic cross-sectional shape data to the final layer based on the last basic cross-sectional shape data. Make a decision on whether or not you

  That is, when the number of layers calculated by the number-of-layers calculation unit 78 does not reach the predetermined number of layers, it is determined that the number of layers is smaller than the number of basic cross-sectional shape data. It is judged that it is impossible to produce a three-dimensional structure based on the discharge amount.

  If the number of layers calculated by the layer number calculation unit 78 reaches the predetermined number of layers, it is determined that the number of layers is not less than the basic cross-sectional shape data, and the discharge set in the basic cross-sectional shape data and the initial setting It is judged that it is possible to produce a three-dimensional structure based on the quantities.

  Then, the determination result determined by the determination unit 80 is output to the selection screen display unit 82.

Further, among the number of layers that the binder and each ink can form, the number of layers having the smallest value among the number of layers determined to have not reached the predetermined number of layers, and the number of layers that can be formed in three-dimensional modeling to decide.

  The screen display unit 82 outputs, from the determination unit 80, a determination result indicating that three-dimensional modeling can be performed based on the basic cross-sectional shape data created by the creation unit 71 and the discharge amount set in the initial setting. Then, the determination result is displayed on a display (not shown).

Further, the screen display unit 82 determines from the determination unit 80 that three-dimensional modeling can not be performed based on the basic cross-sectional shape data created by the creation unit 71 and the ejection amount set in the initial setting. When the result is output, the determination result is displayed on a display (not shown), and the missing binder and ink are thinned out to produce a three-dimensional structure, or according to the missing binder and ink. A selection screen is displayed on a display (not shown) that allows the user to select to reduce and manufacture the three-dimensional structure.

  When the thinning-out unit 84 specifies a binder and an ink which are lacking in three-dimensional modeling based on the calculation result in the layer number calculation unit 78, and produces a three-dimensional structure for all the binder and the ink which are lacking. Calculate the total amount of binder and ink required for printing, and use the total amount calculated and the remaining amount acquired by the acquisition unit 76 to determine the ejection amount after thinning, and the three-dimensional shaping of the insufficient binder and ink As the discharge amount at the time, the discharge amount after thinning is set.

  That is, the thinning unit 84 specifies the binder and the ink that cause the number-of-layers calculation unit 78 not to reach the predetermined number of layers as the insufficient binder and the ink.

  Moreover, the thinning-out part 84 is each cross-sectional shape from the 1st layer to the last layer by the discharge amount set as the initial setting with respect to each of the binder and ink specified to be insufficient at the time of producing three-dimensional modeling. The total amount of binder or ink required to form the

  That is, for example, when it is specified that the binder and the ink of M (magenta) are insufficient, the binder required to form the cross-sectional shape from the first layer to the final layer with the ejection amount set in the initial setting. The total amount and the total amount of M (magenta) ink will be calculated. The total amount of the binder and the ink is calculated by adding the amounts of the binder and the ink in each cross-sectional shape calculated by the layer number calculation unit 78.

  Here, when forming the cross-sectional shape, the binder is used to form the inner layer, the intermediate layer, and the surface layer of the cross-sectional shape, and the ink is used only to form the surface layer of the cross-sectional shape.

  For this reason, the total amount of binder calculated is the total amount of binder required to form the inner layer in each cross-sectional shape from the first layer to the final layer with the discharge amount set in the initial setting (hereinafter, The total amount of the inner layer of the binder is referred to as "the total amount of the binder necessary to form the intermediate layer in each cross-sectional shape from the first layer to the final layer" (hereinafter referred to as "the total amount of the intermediate layer of the binder"). And the total amount of binder required to form the surface layer in each cross-sectional shape from the first layer to the final layer (hereinafter, referred to as “total amount of surface layer of binder”) will be calculated. In addition, the total amount of ink calculated is the discharge amount set in the initial setting, and the total amount of ink required to form the surface layer in the cross-sectional shape from the first layer to the final layer (hereinafter referred to as “ink The total amount of the surface layer will be calculated.

  Then, using the total amount of binder and the total amount of ink calculated in this way, and the remaining amount of binder and the remaining amount of ink acquired by the acquisition unit 76, the ejection amount after thinning of the binder and ink identified as insufficient is calculated. decide.

  Note that the discharge amount after thinning is 100% of the discharge amount when the binder and ink are discharged to all the pixels, and if the discharge amount in the initial setting is 50%, the discharge amount is equal to or less than this discharge amount. The discharge amount after thinning is determined.

  Further, when thinning out the discharge amount of the binder, the inner layer, the intermediate layer, and the surface layer are provided with a priority. First, the discharge amount of the binder in the inner layer is thinned. If the three-dimensional object can not be produced even if the binder discharge amount in the inner layer is thinned to the limit value, then, the binder discharge amount in the intermediate layer is thinned. Furthermore, when it is not possible to produce a three-dimensional structure even if the binder discharge amount in the intermediate layer is thinned out, next, the binder discharge amount in the surface layer is thinned.

  The limit value of the discharge amount after thinning of the inner layer, the limit value of the discharge amount after thinning of the middle layer, and the limit value of the discharge amount after thinning of the surface layer are set in the storage unit 70 in advance.

The determined ejection amount after thinning is output to the storage unit 70, and the three-dimensional formation based on the ejection amount after thinning is performed by the control unit 72 at the time of three-dimensional modeling.

  The reducing unit 86 identifies the binder and the ink lacking in the three-dimensional modeling based on the calculation result in the layer number calculation unit 78, and based on the binder or ink having the largest shortage among the binder and the ink lacking. The magnification for reducing the three-dimensional structure is determined, and the three-dimensional data of the three-dimensional structure is reduced based on the determined magnification.

  That is, the reduction unit 86 specifies the binder and the ink that cause the number-of-layers calculation unit 78 not to reach the predetermined number of layers as the insufficient binder and the ink.

  In addition, the reduction unit 86 calculates the total amount of the binder and the ink necessary for producing the three-dimensional structure with respect to all of the insufficient binder and the ink, and acquires the calculated total amount and the acquisition unit 76. The amount of shortage is calculated from the remaining amount.

  That is, the total amount of binder or ink required to form each cross-sectional shape from the first layer to the final layer with the discharge amount set in the initial setting for each of the binder and ink identified as being deficient Calculate

  From the total amount of binder and the total amount of ink thus calculated, and the remaining amount of binder and the remaining amount of ink acquired by the acquisition unit 76, the binder or ink having the largest shortage is determined.

  Thereafter, with the determined remaining amount of binder or ink, the largest reduction rate that enables the production of a three-dimensional structure is determined.

  Then, the three-dimensional data of the three-dimensional object stored in the storage unit 70 is reduced based on the determined reduction ratio.

The reduced three-dimensional data is output to the creating unit 71, and cross-sectional shape data (that is, reduced cross-sectional shape data) based on the reduced three-dimensional data is created in the creating unit 71.

  In the above configuration, in the three-dimensional modeling apparatus 10 according to the present invention, the case of producing a three-dimensional model will be described.

First, the user fills the storage tank 14 with powder material sufficient to produce a three-dimensional structure, and places the lift plate 30 in the modeling tank 16 in the opening 16a (FIG. 10 (a ))). At this time, the moving member 20 is positioned at a predetermined position where the roller 26 is located rearward of the storage tank 14.

  Also, before starting three-dimensional modeling, the user instructs to create cross-sectional shape data from three-dimensional data representing the three-dimensional shape of the three-dimensional structure to be created, and creates cross-sectional shape data. The cross-sectional shape data created in this way is output to the storage unit 70 and stored in the storage unit 70 as basic cross-sectional shape data.

  Thereafter, when the user operates the operation element (not shown) and instructs start of three-dimensional modeling, three-dimensional modeling processing is started. In this three-dimensional modeling processing, first, the cartridge is accommodated in the cartridge housing portion 22 The remaining amount of the binder and the ink stored in each of the cartridges is acquired (step S602).

That is, in the process of step S602, the weight of the cartridge measured by the weight sensor 52 (58) is obtained by the obtaining unit 76, and the weight of the empty cartridge is subtracted from the weight of the obtained cartridge. The remaining amount of each ink will be calculated.

  Next, the number of layers that can be formed is calculated based on the calculated remaining amounts of binder and ink, basic cross-sectional shape data, and binder and ink discharge amounts set as initial settings (step S604).

That is, in the process of step S604, the number-of-layers calculation section 78 calculates the number of layers that can be formed with the discharge amount set in the initial setting based on the calculated remaining amount of binder and the remaining amount of ink. .

  After that, it is judged whether or not it is possible to produce a three-dimensional structure by the discharge amount set in the initial setting (step S606).

  That is, in the determination process of step S606, the determination section 80 determines the number of layers calculated in the process of step S604 from the first layer based on the first basic cross-sectional shape data to the final based on the last basic cross-sectional shape data. It will be determined whether or not the predetermined number of layers has been reached.

That is, if the determination section 80 determines that the number of layers calculated in the process of step S 604 does not reach the predetermined number of layers, the third order is generated based on the basic cross-sectional shape data and the discharge amount set in the initial setting. If it is determined that it is not possible to produce a three-dimensional object, and it is determined that the number of layers calculated in the process of step S 604 has reached a predetermined number of layers, it is set by basic cross-sectional shape data and initial settings. It is judged that it is possible to produce a three-dimensional structure based on the discharged amount.

  If it is determined by the determination process of step S606 that it is possible to produce a three-dimensional object by the discharge amount set in the initial setting, three-dimensional modeling is performed by the discharge amount set in the initial setting (step S608) After forming the cross-sectional shape of the final layer, the three-dimensional shaping process is finished.

  That is, in the process of step S608, the three-dimensional structure is manufactured by the three-dimensional structure forming apparatus 10 based on the basic cross-sectional shape data while the binder and the discharge amount of each ink remain as initial settings.

Specifically, from the state shown in FIG. 10A, the lift plate 21 in the storage tank 14 is raised by a fixed amount, and the powder material is raised above the opening 14 a of the storage tank 14. At the same time, the lift plate 30 is lowered by a predetermined amount (refer to FIG. 10 (b)). At this time, the predetermined amount by which the elevating plate 30 is lowered is such that the powder layer formed of the powder material filled in the modeling tank 16 has a predetermined thickness, and this predetermined thickness is three-dimensional It corresponds to the interval when dividing the three-dimensional data of the object in the Z-axis direction.

Then, while moving the roller 26 in the direction of arrow B (shown as the direction of arrow A in FIG. 1), the moving member 20 is moved forward to raise the opening portion 14 a upward. powder material is extruded to the front side by the roller 26, many of filled into a shaped vessel 16 to form a powder layer, the powder material that has not been filled into a shaped container 16 is housed in the housing chamber 18 (FIG. 11 (a)).

Thereafter, with the control of the control unit 72 in the microcomputer 28, the discharge head 24 is set at a position based on predetermined basic cross-sectional shape data with respect to the powder layer formed in the modeling tank 16 with the discharge amount set in the initial setting. The binder and each ink are discharged to form a cross-sectional shape based on the predetermined basic cross-sectional shape data in the powder layer (see FIG. 11B).

Thus the cross-sectional shape is formed, together with the movable member 20 is returned to the predetermined position, and a state in which the powder material is raised upward rise to the opening 14a of the elevating plate 21 in the reservoir 14, the shaped tank 16 The elevator plate 30 at the lower position is lowered by a predetermined amount (see FIG. 12A).

Thereafter, the moving member 20 is moved forward while rotating the roller 26 in the direction of arrow B (see FIG. 12B). Thereby, in the modeling tank 16, a further powder layer is formed on the powder layer in which the cross-sectional shape is formed, and based on the next basic cross-sectional shape data of predetermined basic cross-sectional shape data in the newly formed powder layer. The binder and each ink are discharged from the discharge head 24 at the position with the discharge amount set in the initial setting, and a cross-sectional shape based on the basic cross-sectional shape data is formed on the newly formed powder layer.

Thus, a new powder layer is formed on the powder layer forming the cross-sectional shape, and the discharge amount set in the initial setting at the position based on the basic cross-sectional shape data is formed on the new powder layer formed. The process of discharging the binder and the ink from the discharge head 24 to form the cross-sectional shape is repeated to produce a three-dimensional structure based on the basic cross-sectional shape data.

  On the other hand, if it is determined that the three-dimensional object can not be produced by the discharge amount set in the initial setting by the determination processing in step S606, the display device (not shown) is thinned out to three dimensions. A selection screen for selecting whether to manufacture the original three-dimensional object or reducing the three-dimensional object to be manufactured is displayed (step S610).

That is, in the process of step S610, the screen display unit 82 thins out the insufficient binder and ink on the display device (not shown) to produce a three-dimensional structure, or three-dimensional according to the insufficient binder and ink. Display of the selection screen which can select to reduce and manufacture a shaped object is performed.

When the selection screen is displayed on the display device (not shown), it is then determined whether thinning of the insufficient binder and ink is selected to produce a three-dimensional structure (step S612). .

  If it is determined in step S612 that thinning out the missing binder and ink is selected to produce a three-dimensional structure, it is determined that the missing binder and ink specified in the layer number calculation unit 78 are three-dimensional. The total amount of the binder and the ink required to produce a three-dimensional object is calculated (step S614).

That is, in the process of step S614, the thinning portion 84 discharges the binder and the ink, which are determined to be insufficient when producing a three-dimensional structure, from the first layer with the discharge amount set in the initial setting. The total amount of binder or ink required to form each cross-sectional shape up to the final layer is calculated.

Thereafter, the post-thinning ejection amount for the binder and the ink is determined from the total amount of the insufficient binder and the ink calculated in the process of step S614 and the remaining amount of the binder and the ink acquired in the process of step S602 (step S 616).

  Then, only the deficient binder and ink are taken as the ejection amount after thinning determined in the process of step S 616, and the other binder and ink (that is, the binder and ink not specified as deficient binder and ink) For the ejection amount of the initial setting, three-dimensional shaping is performed (step S618), and after the cross-sectional shape of the final layer is formed, the three-dimensional shaping process is ended.

  That is, in the process of step S618, the three-dimensional shaping apparatus 10 sets only the insufficient binder and ink as the discharge amount after thinning determined in the process of step S616, and the other binders and ink are set by the initial setting. Based on the basic cross-sectional shape data, a three-dimensional structure is to be produced.

  As a specific process, the insufficient binder and ink are used as the ejection amount after thinning, and for the other binders and inks, the binder and the ink are ejected from the ejection head 24 with the ejection amount set in the initial setting. Only the process differs from the process of step S608 described above.

That is, in the process of step S618, the process of discharging the binder and the ink from the discharge head 24 at the position based on the basic cross-sectional shape data on the powder layer formed in the modeling tank 16 is repeated to form the cross-sectional shape. A three-dimensional structure based on cross-sectional shape data will be produced. At this time, for the binder and each ink ejected from the ejection head 24, the insufficient binder and the ink are ejected with the ejection amount after thinning, and the other binder and the ink are ejected with the ejection amount set in the initial setting. It becomes.

Specifically, for example, assuming that the ejection amount after thinning for the binder and M (magenta) ink is determined in the process of step S 616, the control unit in the microcomputer 28 is brought into the state shown in FIG. Under the control of 72, the binder 24 and each ink are discharged from the discharge head 24 to the powder layer formed in the modeling tank 16 at a position based on the predetermined basic cross-sectional shape data, and the predetermined basic is applied to the powder layer. The cross-sectional shape is formed based on the cross-sectional shape data. At this time, the amount of ejection after thinning for the binder and M (magenta) ink ejected from the ejection head 24 is the initial amount for C (cyan) ink, Y (yellow) ink and K (black) ink. Discharge is performed with the discharge amount set in the setting.

Further, after the state shown in FIG. 12 (b), the binder and each ink are placed on the newly formed powder layer at the position based on the next basic cross-sectional shape data of the predetermined basic cross-sectional shape data. By discharging, a cross-sectional shape based on the basic cross-sectional shape data is formed in the newly formed powder layer. At this time, the amount of ejection after thinning for the binder and M (magenta) ink ejected from the ejection head 24 is the initial amount for C (cyan) ink, Y (yellow) ink and K (black) ink. Discharge is performed with the discharge amount set in the setting.

  Here, the process of step S 614 and the process of step S 616, that is, the process of determining the ejection amount after thinning will be described by way of a specific example. In addition, the specific example described below is an example of the process which determines the discharge amount after thinning, and it is not limited to the specific example of the following description as a process which determines the discharge amount after thinning.

The detailed process content of the process of determining the discharge amount after this thinning is shown in the flowchart of FIG. 7, and in the determination process of the discharge amount after this thinning, first, whether the binder is insufficient or not A determination is made (step S702).

  Then, if it is determined in the determination process of step S702 that the binder is not insufficient, the process proceeds to the process of step S706 described later.

On the other hand, if it is determined that the binder is insufficient in the determination processing of step S702, the discharge amount determination processing after thinning of the binder is started (step S704).

  Here, FIG. 8 shows the detailed processing contents of the discharge amount determination processing after thinning of the binder in the processing of step S704. In the discharge amount determination processing after thinning of the binder, first, three-dimensional processing is performed. The total amount of binder required to produce a shaped object is calculated (step S802).

  That is, in the process of step S802, the total amount of the binder required to form each cross-sectional shape from the first layer to the final layer from the discharge amount set in the initial setting by the thinning unit 84, that is, the binder The total amount of the inner layer, the total amount of the intermediate layer of the binder, and the total amount of the surface layer of the binder are calculated.

  At this time, the discharge amount of the binder set as the initial setting is, for example, 30% for the inner layer, 60% for the intermediate layer, and 100% for the surface layer, and the limit value of the discharge amount after thinning the inner layer is, for example, the discharge amount The limit value of the discharge amount after thinning of the intermediate layer by 10% is, for example, a discharge amount of 20%, and the limit value of the discharge amount of after thinning of the surface layer is, for example, a discharge amount of 30%.

In the following description, the discharge amount determination process after thinning the binder will be described using an example of the discharge amount of the binder and the limit value of the discharge amount in each layer.

Next, the total amount of the surface layer of the binder and the total amount of the intermediate layer of the binder are subtracted from the remaining amount of the binder obtained in the process of step S602 (step S804), and the ratio of the calculated value to the total amount of the inner layer of binder is 10% It is determined whether it exceeds (step S806).

  In the determination process of step S806, if it is determined that the ratio of the calculated value calculated in the process of step S804 to the total amount of the inner layer of the binder exceeds 10%, the discharge amount of the inner layer is set to 10% (step S808). ), The process proceeds to step S706.

That is, in the process of step S808, the discharge amount of the inner layer is 10%, and the discharge amounts of the intermediate layer and the surface layer are as initial settings (that is, 60% of the intermediate layer and 100% of the surface layer).

On the other hand, in the determination process of step S806, the ratio of the calculated value calculated in the process of step S804 to the total amount of the inner layer of the binder is determined not to exceed 10% (that is, 10% or less). The amount of binder used when the total amount of the surface layer of the binder and the discharge amount of the inner layer of the binder are 10% is subtracted from the remaining amount of the binder obtained in the process of step S602 (step S810). It is determined whether the ratio of the calculated value to the total amount exceeds 30% (step S812).

  In the determination process of step S812, if it is determined that the ratio of the calculated value calculated in the process of step S810 to the total amount of the intermediate layer of the binder exceeds 30%, the discharge amount of the inner layer is 10%, the intermediate layer The ejection amount of 30% is set (step 814), and the process proceeds to step S706.

That is, in the process of step S814, the discharge amount of the inner layer is 10%, the discharge amount of the intermediate layer is 30%, and the discharge amount of the surface layer is as initial setting (that is, 100%).

On the other hand, in the determination process of step S812, the ratio of the calculated value calculated in the process of step S810 to the total amount of the intermediate layer of the binder is determined not to exceed 30% (that is, 30% or less). Then, it is determined whether the ratio of the calculated value calculated in the process of step S810 to the total amount of the intermediate layer of the binder exceeds 20% (step S816).

  In the determination process of step S816, when it is determined that the ratio of the calculated value calculated in the process of step S810 to the total amount of the intermediate layer of the binder exceeds 20%, the discharge amount of the inner layer is 10%, the intermediate layer The discharge amount of is set to 20% (step S818), and the process proceeds to step S706.

That is, in the process of step S 818, the discharge amount of the inner layer is 10%, the discharge amount of the intermediate layer is 20%, and the discharge amount of the surface layer is as initial setting (that is, 100%).

On the other hand, in the determination processing of step S816, the ratio of the calculated value calculated in the processing of step S810 to the total amount of the intermediate layer of the binder is determined not to exceed 20% (that is, 20% or less). Based on the remaining amount of binder obtained in the process of step S602, the usage of the binder when the discharge amount of the inner layer of the binder is 10% and the usage of the binder when the discharge amount of the intermediate layer of the binder is 20% Are subtracted (step S820), and it is determined whether the ratio of the calculated value to the surface layer of the binder exceeds 40% (step S822).

In the determination process of step S822, if it is determined that the ratio of the calculated value calculated in the process of step S820 to the total amount of the surface layer of the binder exceeds 40%, the discharge amount of the inner layer is 10% and the intermediate layer is The ejection amount is 20%, and the ejection amount of the surface layer is 40% (step S824), and the process proceeds to step S706.

On the other hand, in the determination process of step S822, it is determined that the ratio of the calculated value calculated in the process of step S820 to the total amount of the surface layer of the binder does not exceed 40% (that is, 40% or less). It is determined whether the ratio of the calculated value calculated in the process of step S820 to the surface layer of the binder exceeds 30% (step S826).

In the determination process of step S826, if it is determined that the ratio of the calculated value calculated in the process of step S820 to the total amount of the surface layer of the binder exceeds 30%, the discharge amount of the inner layer is 10%, and the intermediate layer The ejection amount is 20%, and the ejection amount of the surface layer is 30% (step S828), and the process proceeds to step S706.

On the other hand, in the determination process of step S826, if it is determined that the ratio of the calculated value calculated in the process of step S820 to the total amount of the binder surface layer does not exceed 30% (that is, 30% or less). The fact that three-dimensional modeling is not possible due to lack of binder is displayed on the display device (not shown) (step S 830), and the ejection amount determination process after thinning the binder is completed, thereby three-dimensional modeling End the process.

  Next, it is determined whether the ink is insufficient (step S706).

That is, in the process of step S706, of the C (cyan) ink, the M (magenta) ink, the Y (yellow) ink and the K (black) ink, it is specified as an ink which is insufficient in the layer number calculation unit 78 It is determined whether or not there is ink that has been

  Then, if it is determined that the ink is not insufficient in the determination process of step S706, the process returns to the process of step S702, and the processes of step S702 and subsequent steps are performed again.

The number of times of returning to the process of step S702 is counted, and when the number of times of returning to the process of step S702 reaches a predetermined number of times, the process returns to the process of step S604 to calculate the number of layers that can be formed again. You may do so.

If it is determined in step S706 that the ink is insufficient, the C (cyan) ink, the M (magenta) ink, the Y (yellow) ink and the K (black) ink are insufficient. The discharge amount determination process after thinning the ink is started for each of the determined inks (step S 708).

  Here, FIG. 9 shows the detailed processing contents of the discharge amount determination processing after thinning the ink in the processing of step S 708. In the discharge amount determination processing after the thinning of the ink, it is assumed that there is a shortage at first. For the predetermined ink that has been determined, the total amount required to produce a three-dimensional structure is calculated (step S902).

  That is, in the process of step S902, the predetermined amount of ink required to form each cross-sectional shape from the first layer to the final layer from the predetermined ink discharge amount set in the initial setting by the thinning-out unit 84 The total amount of will be calculated.

At this time, the discharge amount of the predetermined ink set as the initial setting is 20%, and the limit value of the discharge amount of the ink after thinning is 5%.

Next, the predetermined remaining amount of ink obtained in the process of step S602 is compared with the total amount of the predetermined ink calculated in the process of step S902, and step S602 for the total amount of predetermined ink calculated in the process of step S902. It is determined whether the ratio of the predetermined remaining amount of ink acquired in the process of (5) exceeds 15% (step S904).

  If it is determined in step S904 that the ratio of the predetermined ink remaining amount to the predetermined total amount of ink exceeds 15%, the predetermined ink ejection amount is set to 15% (step S906), and step S616 is performed. Go to the process of

If it is determined in step S904 that the ratio of the predetermined ink remaining amount to the predetermined total amount of ink does not exceed 15% (that is, 15% or less), the calculation in step S902 is performed. It is determined whether the ratio of the predetermined ink remaining amount acquired in the process of step S602 to the predetermined total amount of ink exceeds 10% (step S908).

  If it is determined in step S 908 that the ratio of the predetermined ink remaining amount to the predetermined total amount of ink exceeds 10%, the predetermined ink ejection amount is set to 10% (step S 910), and step S 616 is performed. Go to the process of

If it is determined that the ratio of the predetermined ink remaining amount to the predetermined total amount of ink does not exceed 10% (that is, 10% or less) in the determination process of step S908, the process of step S902 is performed. It is determined whether the ratio of the predetermined ink remaining amount acquired in the process of step S602 to the calculated total amount of ink exceeds 5% (step S912).

  If it is determined in step S912 that the ratio of the predetermined ink remaining amount to the predetermined total ink amount exceeds 5%, the predetermined ink ejection amount is set to 5% (step S914), and step S618 is performed. Go to the process of

In addition, in the determination processing of step S912, when it is determined that the ratio of the predetermined ink remaining amount to the predetermined total amount of ink does not exceed 5% (that is, 5% or less), the predetermined ink is insufficient. To the effect that three-dimensional modeling is not possible is displayed on the display device (not shown) (step S916), and the three-dimensional modeling process is completed by terminating the discharge amount determination process after thinning the ink. Do.

  In the determination process of step S612, it is not selected to make a three-dimensional structure by thinning out the missing binder and ink (that is, in the selection screen displayed on the display device (not shown)), three-dimensional structure formation If it is determined that the product is selected to be reduced in size, it is necessary to prepare a three-dimensional structure for the insufficient binder and ink specified in the layer number calculation unit 78. The total amount of binder and ink is calculated (step S620).

That is, in the process of step S620, the reduction unit 86 sets the discharge amount set in the initial setting from the first layer to each of the binder and the ink which are determined to be insufficient when producing a three-dimensional structure. The total amount of binder or ink required to form each cross-sectional shape up to the final layer is calculated.

After that, the insufficient amounts of the binder and the ink determined to be insufficient are calculated from the total amount of the binder and the ink calculated in the process of step S620 and the remaining amounts of the binder and the ink acquired in the process of step S602 (step S622). The binder or ink with the largest shortage is determined (step S624).

Then, based on the determined remaining amount of binder or ink, the reduction ratio at which the three-dimensional structure can be produced with the largest size is determined (step S626).

  The three-dimensional data of the three-dimensional object stored in the storage unit 70 is reduced at the reduction ratio thus determined (step S 628), and cross-sectional shape data of the reduced three-dimensional data is created (step S 630).

That is, in the process of step S630, the creating unit 71 creates cross-sectional shape data representing a cross section obtained by cutting the three-dimensional data reduced in the process of step S628 in the horizontal direction at predetermined intervals. It is output to the storage unit 70 as reduced cross-sectional shape data. The reduced cross-sectional shape data thus created has a smaller number of cross-sectional shape data (that is, the number of cross-sectional shapes) and a smaller cross-sectional volume, as compared with the basic cross-sectional shape data.

  Thereafter, three-dimensional formation is performed based on the reduced cross-sectional shape data created in the process of step S630 (step S632), and after the cross-sectional shape of the final layer is formed, the three-dimensional formation process is ended. In addition, as a discharge amount of the binder and ink at the time of three-dimensional modeling, it becomes the discharge amount set in the initial setting.

  That is, in the process of step S632, the binder and the ink are set to the discharge amount set in the initial setting by the three-dimensional structure 10, and the three-dimensional structure is formed based on the reduced cross-sectional shape data created in the process of step S630. It will be produced.

  Note that as a specific process, only the point of forming the cross-sectional shape based on the reduced cross-sectional shape data created in the process of step S630 differs from the process of step S608 described above.

That is, in the process of step S632, the binder from the discharge head 24 is set to the powder layer formed in the modeling tank 16 at the position based on the reduced cross-sectional shape data created in the process of step S630. The process of discharging the ink to form the cross-sectional shape is repeatedly performed to produce a three-dimensional structure based on the reduced cross-sectional shape data.

Specifically, after the state shown in FIG. 11 (a), under the control of the control unit 72 in the microcomputer 28, the powder layer formed in the modeling tank 16 is formed in the process of step S630. The binder and each ink are discharged from the discharge head 24 at the position based on the reduced cross-sectional shape data, and the cross-sectional shape is formed in the powder layer based on the predetermined reduced cross-sectional shape data. It will be done.

Further, after the state shown in FIG. 12 (b), the discharge amount set in the initial setting at the position based on the next reduced cross-sectional shape data of the predetermined reduced cross-sectional shape data on the newly formed powder layer. Then, the binder and each ink are discharged from the discharge head 24 to form a cross-sectional shape based on the reduced cross-sectional shape data in the newly formed powder layer.

As described above, in the three-dimensional shaping apparatus 10 according to the present invention, the colorless binder for curing the powder material and the ink for coloring the colorless binder are discharged from the discharge head 24. . Then, as such an ink, for example, a general-purpose aqueous pigment ink used for an ink jet printer or the like is used.

  In addition, when the user instructs to start three-dimensional modeling, the three-dimensional modeling apparatus 10 according to the present invention measures the weight of the cartridge storing the binder and the ink, and the remaining binder and ink stored in the cartridge. The amount was calculated, and from this calculation result, from the discharge amount set in the basic cross-sectional shape data and the initial setting, it was calculated and calculated how many layers of the cross-sectional shape can be formed based on the basic cross-sectional shape data Based on the number of layers in the cross-sectional shape, it was determined whether production of a three-dimensional object was possible or impossible.

  If it is judged that three-dimensional modeling is impossible, the missing binder and ink are thinned out to produce a three-dimensional article, or the three-dimensional article is reduced and produced according to the insufficient binder and ink. Added a selection screen for the user.

  In this selection screen, when it is selected to thin out the insufficient binder and ink to produce a three-dimensional structure, the insufficient binder and ink are identified, and the ejection amount set in the initial setting for the insufficient binder and ink is selected. To determine the discharge amount after thinning.

  And in the case of three-dimensional modeling, about the binder and ink which run short, it discharges from the discharge head 24 by the discharge amount after the thinning-out decided, and specifies as other binders and ink (that is, the binder and ink which run short) In the case of the binder and the ink that were not printed, the ink was ejected from the ejection head 24 at the ejection amount set in the initial setting. At this time, three-dimensional shaping is performed based on the basic cross-sectional shape data.

  In addition, when it is selected that the three-dimensional object be reduced and produced according to the binder and ink which is lacking on the selection screen, the binder and ink which is lacking are identified, and the largest amount of binder or ink remains. Based on the amount, determine the reduction ratio of the three-dimensional object, reduce the three-dimensional data of the three-dimensional object based on the determined reduction ratio, and create the reduced cross-sectional shape data from the reduced three-dimensional data I made it.

  And in the case of three-dimensional modeling, three-dimensional modeling was performed based on this reduced cross-sectional shape data. At this time, the binder and the ink have the ejection amount set in the initial setting.

For this reason, in the three-dimensional modeling apparatus 10 according to the present invention, even if the remaining amount of the binder or ink stored in the cartridge runs short, for example, it is desirable to perform three-dimensional modeling even if strength is ignored. Can perform three-dimensional modeling that reflects the user's intention.

  Further, the three-dimensional modeling apparatus 10 according to the present invention is provided with a weight sensor 52 (58) in the cartridge storage unit 22 and measures the remaining amount of the binder and ink stored in each cartridge in the cartridge storage unit 22. The binder and the ink from each cartridge are supplied to the discharge head 24 from the cartridge storage unit 22 through the tube.

As a result, the three-dimensional modeling apparatus 10 according to the present invention can be made smaller in size than the three-dimensional modeling apparatus according to the related art in which the binder is supplied to the head through the sub tank.

  The above-described embodiment may be modified as shown in the following (1) to (9).

  (1) In the above-described embodiment, the screen display unit 82 selects the option of “thinning out to produce a three-dimensional object” and the option of “reducing the three-dimensional object to produce”. Although the possible selection screen is displayed, it is of course that the present invention is not limited to this.

  That is, the screen display unit 82 may display, for example, options such as “stop three-dimensional modeling” on the selection screen in addition to the options described above.

  (2) In the above-described embodiment, in the discharge amount determination process after thinning the ink, when the ink discharge amount limit value is reached, it is displayed that three-dimensional modeling can not be performed. Of course not.

  That is, when the ink discharge amount limit value is reached, three-dimensional shaping is performed by expressing another color that can be expressed without using an insufficient predetermined ink and performing three-dimensional shaping, without using all the inks. In this selection screen, a selection screen is displayed that allows selection of three-dimensional modeling by various expression methods such as performing three-dimensional modeling in a single color using an ink other than a predetermined ink to be performed or insufficient. Three-dimensional modeling may be performed by the method described above.

  (3) In the embodiment described above, both the roller 26 and the discharge head 24 are disposed on the moving member 20, but it is a matter of course that the present invention is not limited to this. The head 24 may be disposed on a different moving member, and the roller 26 and the discharge head 24 may be moved in the Y-axis direction separately from each other.

  (4) In the embodiment described above, as shown in FIG. 3B, the weight sensor 52 measures the weight of the cartridge in which the binder and the ink are stored, using the rotating portion 50 and the support member 54. Alternatively, as shown in FIG. 3C, the weight of the cartridge storing the binder and ink is measured by the weight sensor 58 using the storage stage 56, but the present invention is not limited to this. Of course.

  That is, as long as the weight of the cartridge in which the binder and the cartridge are stored can be measured by the weight sensor in the cartridge storage unit 22, the cartridge may be measured in any manner.

  (5) In the above-described embodiment, the number-of-layers calculation unit 78 calculates the number of layers capable of creating a three-dimensional object with the discharge amount set in the cross-sectional shape data and the initial setting. However, the present invention is not limited to this, and it is needless to say that the remaining portion of the binder and the ink acquired by the acquiring unit 76 is compared with the volume of the three-dimensional data or the total volume of the basic cross-sectional shape data. Based on the basic cross-sectional shape data, it may be determined whether or not it is possible to create a three-dimensional object with the discharge amount set in the initial setting.

  (6) In the above-described embodiment, when thinning out the discharge amount of the binder, the inner layer, the intermediate layer, and the surface layer are prioritized, but the invention is of course not limited thereto. In the inner layer, the intermediate layer, and the surface layer, the discharge amount of a predetermined amount may be thinned uniformly.

  (7) In the above-described embodiment, the colorless binder and the four-color aqueous pigment ink are discharged from the discharge head 24. However, the present invention is of course not limited thereto. Instead of the pigment ink, binders colored in four colors (colored binders) may be ejected from the ejection head.

  (8) In the above-described embodiment, the powder material stored in the storage tank 14 is pushed up by the lift plate 21, and the pushed-up powder material is pushed out by the roller 26 and supplied to the shaping tank 16. Of course, the configuration is not limited to this, and a configuration may be provided in which the powder material is directly supplied to the modeling tank 16 without providing the storage tank 14 and the roller 26.

  In this case, it is also necessary to provide a mechanism such as a roller for flattening the surface of the powder material supplied to the formation tank 16.

  (9) The above-described embodiment and the modifications shown in the above (1) to (8) may be appropriately combined.

  The present invention is suitable for use as a three-dimensional modeling apparatus of a powder adhering and laminating method.

DESCRIPTION OF SYMBOLS 10 three-dimensional modeling apparatus, 14 storage tank, 16 modeling tank , 18 storage tank, 20 moving members, 21 and 30 raising and lowering plate, 22 cartridge storage part, 24 discharge head, 26 roller, 28 microcomputer, 52, 58 weight sensor, 70 storage unit, 72 control unit, 74 setting change unit, 76 acquisition unit, 78 layer number calculation unit, 80 determination unit, 82 screen display unit, 84 thinning unit, 86 reduction unit

Claims (7)

A binder for curing the powder material and an ink for coloring the powder material are ejected from the head to form a cross-sectional shape with respect to the powder layer formed with a predetermined thickness in the modeling tank by the powder material supplied. Forming a new powder layer on the powder layer in which the cross-sectional shape is formed in the modeling tank, and discharging the binder and the ink from the head to the new powder layer to form a cross-sectional shape In a three-dimensional modeling apparatus that stacks cross-sectional shapes to produce a three-dimensional object by repeatedly performing an operation of
Creating means for creating cross-sectional shape data from three-dimensional data representing the three-dimensional shape of the three-dimensional object to be created;
Acquisition means for acquiring the remaining amount of the binder and the ink stored in the cartridge;
The binder and the ink are ejected with a preset ejection amount based on the binder and the remaining amount of the ink acquired by the acquisition unit, and the first cross-sectional shape data created from the three-dimensional data A determination unit that determines whether it is possible to produce a three-dimensional object;
When it is judged that it is impossible to produce a three-dimensional structure by the judgment means, the binder and the ink are thinned to produce a three-dimensional structure, or the three-dimensional structure is reduced. Screen display means for displaying a selection screen that can be selected to be manufactured;
On the selection screen, if it is selected to produce a three-dimensional object by thinning out, thinning means for thinning out the discharge amount set in advance for the binder and the ink which run short and determining the discharged amount after thinning When,
In the selection screen, when it is selected to produce a three-dimensional object in a reduced size, three-dimensional based on the remaining amount of the binder and the ink having the largest shortage among the binder and the ink lacking. Determining a reduction rate of a formed object, and reducing the three-dimensional data based on the determined reduction rate;
The creation means creates the first cross-sectional shape data based on the three-dimensional data, and creates second cross-sectional shape data based on the three-dimensional data reduced by the reduction means.
The control means, when the ejection amount after thinning is determined by the thinning means, uses the binder and the ink whose ejection amount after thinning is determined as the ejection amount after thinning, and the first cross-sectional shape data The head is controlled based on the above, and when the three-dimensional data is reduced by the reduction means, the binder and the ink are set as the discharge amounts set in advance, and the head is made based on the second cross-sectional shape data A three-dimensional modeling apparatus characterized by controlling In the three-dimensional shaping apparatus according to claim 1,
The three-dimensional modeling apparatus, wherein the ink is an aqueous pigment ink. A colorless binder for curing the powder material and a colored binder for coloring the powder material are discharged from the head to form a cross-sectional shape with respect to the powder layer formed with a predetermined thickness in the modeling tank by the powder material supplied. After that, a new powder layer is formed on the powder layer in which the cross-sectional shape is formed in the modeling tank, and the colorless binder and the colored binder are discharged from the head to the new powder layer. In a three-dimensional modeling apparatus that stacks cross-sectional shapes to produce a three-dimensional object by repeatedly and repeatedly performing the operation of forming the cross-sectional shapes,
Creating means for creating cross-sectional shape data from three-dimensional data representing the three-dimensional shape of the three-dimensional object to be created;
Acquisition means for acquiring the remaining amount of the colorless binder and the colored binder stored in the cartridge;
A first cross-sectional shape created from the three-dimensional data by discharging the colorless binder and the colored binder at a preset discharge amount based on the remaining amounts of the colorless binder and the colored binder obtained by the obtaining unit. A determination unit that determines whether it is possible to produce a three-dimensional object based on the data;
When it is judged by the judgment means that it is impossible to produce a three-dimensional structure, the colorless binder and the colored binder may be thinned out to produce a three-dimensional structure, or the three-dimensional structure may be reduced. Screen display means for displaying a selection screen which can be selected to be prepared
In the selection screen, when it is selected to produce a three-dimensional object by thinning out, the ejection amount set in advance is thinned out to determine the ejection amount after thinning out for the colorless binder and the colored binder which run short. Thinning means,
In the selection screen, when it is selected that the three-dimensional structure is to be reduced in size, the remaining amount of the colorless binder and the colored binder is the largest among the insufficient amounts of the colorless binder and the colored binder. Determining a reduction ratio of the three-dimensional structure based on the reduction ratio, and reducing the three-dimensional data based on the determined reduction ratio;
The creation means creates the first cross-sectional shape data based on the three-dimensional data, and creates second cross-sectional shape data based on the three-dimensional data reduced by the reduction means.
When the discharge amount after thinning is determined by the thinning means, the control means sets the colorless binder and the colored binder whose discharge amount after thinning is determined as the discharge amount after thinning, and the first cross section When the three-dimensional data is reduced by the reduction means while controlling the head based on shape data, the colorless binder and the colored binder are set as discharge amounts set in advance, and the second cross-sectional shape data is obtained. And controlling the head based on the three-dimensional modeling apparatus. In the three-dimensional shaping apparatus according to any one of claims 1 or 2, further,
And a measuring unit disposed in the storage unit and measuring the weight of each of the binder and the cartridge in which the ink is stored.
The three-dimensional modeling apparatus, wherein the acquiring unit acquires the remaining amount of the binder and the ink by subtracting the weight of an empty cartridge from the weight measured by the measuring unit. In the three-dimensional shaping apparatus according to any one of claims 1, 2 or 4, further,
The first based on the binder and the remaining amount of the ink acquired by the acquiring means, the first cross-sectional shape data created from the three-dimensional data, and the ejection amount of the binder and the ink set in advance. rather the cross-sectional shape data based Dzu and a calculating means for calculating whether the cross-sectional shape can be many layers formed,
The determination means discharges the binder and the ink by a preset discharge amount based on the number of layers in the cross-sectional shape calculated by the calculation means, and three-dimensional modeling based on the first cross-sectional shape data It is judged whether it is possible to manufacture a thing. Three-dimensional modeling device characterized by the above-mentioned. The three-dimensional shaping apparatus according to any one of claims 1, 2, 4 and 5.
The cross-sectional shape formed based on the cross-sectional shape data is formed of a three-layer structure of an inner layer, an intermediate layer and a surface layer,
In the thinning means, when determining the discharge amount after thinning the binder, the discharge amount in the inner layer, intermediate layer and than the discharge amount in the surface layer thinning preferentially, the discharge amount of the discharge amount in the intermediate layer in the surface layer A three-dimensional shaping apparatus characterized by thinning preferentially. A binder for curing the powder material and an ink for coloring the powder material are ejected from the head to form a cross-sectional shape with respect to the powder layer formed with a predetermined thickness in the modeling tank by the powder material supplied. Forming a new powder layer on the powder layer in which the cross-sectional shape is formed in the modeling tank, and discharging the binder and the ink from the head to the new powder layer to form a cross-sectional shape In a three-dimensional modeling method of producing a three-dimensional model by a three-dimensional modeling apparatus that stacks cross-sectional shapes to produce a three-dimensional model by repeatedly performing an operation of
A first creating step of creating first cross-sectional shape data from three-dimensional data representing a three-dimensional shape of the three-dimensional structure to be created;
An acquiring step of acquiring the remaining amount of the binder and the ink stored in the cartridge;
The binder and the ink are discharged with a preset discharge amount based on the binder and the remaining amount of the ink obtained in the obtaining step, and a three-dimensional structure is produced based on the first cross-sectional shape data. A determination step of determining whether it is possible to
When it is judged that it is impossible to create a three-dimensional structure in the determination step, the binder and the ink are thinned to produce a three-dimensional structure, or the three-dimensional structure is reduced. An image display step of displaying a selected image that can be selected to be manufactured;
In the selection screen, when it is selected to produce a three-dimensional object by thinning out, a thinning step of thinning out the discharge amount set in advance for the binder and the ink which are lacking and determining the discharge amount after thinning When,
In the selection screen, when it is selected to produce a three-dimensional object in a reduced size, three-dimensional based on the remaining amount of the binder and the ink having the largest shortage among the binder and the ink lacking. A reduction step of determining a reduction ratio of a shaped object and reducing the three-dimensional data based on the determined reduction ratio;
When the ejection amount after thinning is determined in the thinning step, the binder whose ink ejection amount after thinning is determined and the ink are used as the ejection amount after thinning, and the head is determined based on the first cross-sectional shape data. Control step of controlling
A second creation step of creating second cross-sectional shape data from the reduced three-dimensional data when the three-dimensional data is reduced in the reduction step;
When the second cross-sectional shape data is generated in the second generation step, the binder and the ink are set as discharge amounts set in advance, and the head is controlled based on the second cross-sectional shape data. The three-dimensional modeling method executes the two control steps.

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