JP2002292748A - Colored three-dimensional forming system and method, data processing device for colored three-dimensional forming and method, data processing program for colored three-dimensional forming, and recording medium having data processing program recorded thereon - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a colored three-dimensional forming system which can manufacture a formed object the color tone of which is always stable. SOLUTION: The system forms a powder material layer 80 on a forming stage 52, applies a binder to prescribed areas of powder layers based on shape data, forms a bond body 82 of a powder material by curing the binder, and gives a coloring agent based on color data. By repeating these processes for the powder layers formed in turn, a colored three-dimensional object 84 is formed. The system, concerning conditions which change the color reproduction of the object, further has a color correction table expressing the relationship between the color data and the coloring properties of the object colored on the basis of the color data and corrects the color data for giving the coloring agent on the basis of the table.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a three-dimensional printing system and method, and more particularly to a method of forming a colored printed object by sequentially stacking layers of a predetermined material and coloring each material layer. The present invention relates to a coloring three-dimensional printing system and method. The present invention also relates to a data processing apparatus and method for processing color data to create a three-dimensional structure having a desired color. The present invention further relates to a data processing program for coloring three-dimensional printing, and a recording medium on which the data processing program is recorded.

[0002]

BACKGROUND OF THE INVENTION In a conventional three-dimensional printing apparatus, a thin layer of a powder material is formed, and a binder which is dried and hardened is applied using, for example, an ink jet head. In some cases, a three-dimensional structure is formed by repeating a process of forming a combined body material. In this three-dimensional printing apparatus, for example, the following operation is performed, and a three-dimensional printing object is created.

First, a gypsum or starch powder material is uniformly spread in a thin layer by a roller mechanism or the like. Next, an inkjet head is scanned over a region to be formed in the thin layer of the powder material, and a binder that is cured by drying is applied. The powder material in the area where the binder is applied is combined with the lower layer or the adjacent cured area. Until the modeling is completed, the steps of sequentially forming a thin layer of the powder material and applying the binder are repeated. When the shaping is completed, the three-dimensional structure bonded by the binder can be taken out by removing the powder material in the region where the binder is not applied.

[0004] Alternatively, for example, Japanese Patent Application No.
The three-dimensional modeling apparatus in 01-30888 uses an ultraviolet curing resin as a binder, and irradiates ultraviolet rays after applying the binder to bond the powder material.

By the way, the present inventors are studying a method of forming a shaped article having a surface colored. If the color to be colored is a single color or the image applied to the surface is simple, it is possible to perform coloring processing by human hands after modeling the object, but the arrangement of colors and images are complicated. In this case, not only is it difficult for a human to perform the coloring process, but also it is extremely difficult to automatically apply a color to a shaped object having irregularities (for example, the distance between the surface of the shaped object and the inkjet head is arbitrary). It is difficult to keep it constant in position.)

Therefore, the present inventors have considered that a colored molded article can be produced by applying a coloring agent such as ink to the cured powder material for each layer of the powder material. I have. Such coloring is usually performed based on three-dimensional image data of an object to be formed, after creating data indicating a coloring region to which a coloring agent is applied (hereinafter referred to as color data). .

However, according to the study of the present inventor, if the conditions such as the materials used for modeling are different even if the same three-dimensional image data is used, the color tone of the formed object differs from the target color tone. Therefore, it was found that it was difficult to create a desired colored object.

Accordingly, an object of the present invention is to provide a color three-dimensional modeling system and a method capable of always producing a molded article having a stable color tone.

It is another object of the present invention to provide a data processing apparatus and method for processing color data to create a three-dimensional object having a desired color.

Still another object of the present invention is to provide a data processing program for processing color data to create a three-dimensional structure having a desired color, and a recording medium on which the data processing program is recorded. It is to be.

[0011]

SUMMARY OF THE INVENTION In order to achieve the above object, a coloring three-dimensional printing system according to the present invention sequentially stacks layers of a predetermined material and performs coloring for each material layer to form a colored printing object. In the coloring three-dimensional printing system to be created, a layer forming means for sequentially forming layers of the material, a coloring means for applying a coloring agent to a coloring region of each material layer, and each material for expressing a three-dimensional printing object Cross-sectional data creating means for creating a plurality of cross-sectional data corresponding to the layer, each cross-sectional data has shape data and color data, the layer forming means forms each material layer based on the shape data, The coloring means applies a coloring agent to a coloring region of each material layer based on the color data, and the coloring three-dimensional printing system further uses the color data and the data for conditions that cause a change in the color reproduction of the printed object. To Storage means for storing a color correction table representing the relationship with the coloring property of the shaped object to be colored; andcorrection means for correcting the color data created by the cross-section data creation means based on the color correction table. It is a feature.

Conditions that cause a change in color reproduction include, for example,
The above-mentioned material or coloring agent for forming a modeled object.

When an ink jet head for discharging a colorant from a direction substantially perpendicular to each material layer is used as a coloring means, a direction vector in a laminating direction should be further formed as a condition for causing variation in color reproduction. An angle between the object surface and the outward normal vector is given.

[0014] The coloring three-dimensional printing method according to the present invention is a coloring three-dimensional printing method for sequentially forming layers of a predetermined material and coloring each material layer to create a colored printed object. A layer forming step of sequentially forming layers of materials, a coloring step of applying a coloring agent to a colored region of each material layer, and creating a plurality of cross-sectional data corresponding to each material layer for expressing a three-dimensional structure. Cross-sectional data creating step, each cross-sectional data has shape data and color data, in the layer forming step, each material layer is formed based on the shape data, in the coloring step, based on the color data, A coloring agent is applied to the coloring area of each material layer, and the coloring three-dimensional printing method further includes a color data and a color developing property of the printing article colored based on the data for a condition that causes variation in color reproduction of the printing article. Relation based on the color correction table representing the and is characterized in that it comprises a step of correcting the color data generated in the cross-section data producing step.

A data processing apparatus according to the present invention is used in a coloring three-dimensional printing system for forming a colored printed object by sequentially stacking layers of a predetermined material and coloring each material layer. In, comprises a cross-sectional data creating means for creating a plurality of cross-sectional data corresponding to each material layer for expressing a three-dimensional structure, each cross-sectional data has shape data and color data, the shape data,
The color data is used to form each material layer, the color data is used to color each material layer, and the data processing device further includes color data and the data on conditions that cause variation in the color reproduction of the modeled object. Storage means for storing a color correction table representing the relationship with the color development of a modeled object based on the color correction table, and correction means for correcting the color data created by the cross-section data creation means based on the color correction table. It is characterized by having.

The data processing method according to the present invention is a data processing method used in a coloring three-dimensional printing system for creating a colored printing object by sequentially stacking layers of a predetermined material and coloring each material layer. In, includes a cross-sectional data creating step of creating a plurality of cross-sectional data corresponding to each material layer for expressing a three-dimensional structure, each cross-sectional data has shape data and color data, the shape data,
The color data is used to form each material layer, the color data is used to color each material layer, and the data processing method further includes color data and the data for conditions that cause variations in the color reproduction of the modeled object. And a correction step of correcting the color data created in the cross-section data creation step based on a color correction table representing the relationship with the coloring property of the modeled object colored based on the color data.

The data processing program according to the present invention comprises:
In a data processing program used for a coloring three-dimensional modeling system that sequentially creates layers of a predetermined material and creates a colored modeling object by coloring each material layer, the coloring three-dimensional modeling system includes three-dimensional modeling. Cross-section data generating means for generating a plurality of cross-section data corresponding to each material layer for expressing a modeled object is provided, each cross-section data has shape data and color data, and the shape data forms each material layer. The color data is used for coloring each material layer, and the coloring three-dimensional printing system further uses the color data and the data for conditions that cause variation in the color reproduction of the printed object. A storage means for storing in advance a color correction table representing a relationship with the coloring property of a shaped object to be colored, and a color correction table generated in a cross-section data generation step based on the color correction table. Correction means for correcting the chromatic data, the data processing program causes the cross-section data creation means to create a plurality of cross-section data obtained by slicing the three-dimensional image data of the modeled object at a predetermined pitch, and is recorded in the storage means. The color correction table is read out, and based on the color correction table, the correction means corrects the color data created by the cross-section data creation means.

The recording medium according to the present invention is characterized in that it is a recording medium on which the data processing program according to the present invention is recorded.

[0019]

Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the overall configuration of the three-dimensional printing system according to the present invention. The three-dimensional modeling system 1 includes a three-dimensional modeling apparatus 100 that performs coloring modeling of a modeling object, and a host computer that supplies a control signal and two-dimensional image data relating to a cross-sectional image of the modeling object to the three-dimensional modeling apparatus 100. And 2.

The three-dimensional printing apparatus 100 applies an ultraviolet curable resin as a binder to a predetermined powder material as described later, and irradiates the ultraviolet light to bond the powder material.
Further, by performing coloring with color ink, a combined body of the color powder materials is sequentially formed, and a colored molded article is created as a final combined body.

The host computer 2 is a so-called general computer system including a control unit 2a, a display 2b, a keyboard 2c, and a mouse 2d. The control unit 2a is loaded with a program for performing a process of creating cross-sectional data obtained by slicing three-dimensional image data of a three-dimensional modeling object input in advance at a predetermined pitch, for example, in the horizontal direction. . For this reason, the host computer 2 can create the cross-sectional data (two-dimensional image data) of the object to be modeled from the three-dimensional image data of the modeling object, and converts the created cross-sectional data into the three-dimensional modeling apparatus 100. To supply. The cross-sectional data is further corrected according to conditions such as a powder material used for modeling, which will be described later.

The control unit 2a is connected to a colorimeter 104 for performing colorimetry on a modeled object. This device 104
This is used to create a color correction table described later.

The host computer 2 only supplies three-dimensional image data to the three-dimensional printing apparatus 100.
On the side of the three-dimensional printing apparatus 100, cross-sectional data may be created from three-dimensional image data (see Table 1 below).
(D)).

Host computer 2 and three-dimensional printing apparatus 1
Between 00 and 00, data and the like can be transferred online, and data and the like can be transferred offline using the portable recording medium 3.
Recording media include a magneto-optical disk (MO), a compact disk (CD-RW), a digital video disk (DVD-RAM), and a memory card.

Next, an embodiment of the three-dimensional printing apparatus 100 will be described. FIG. 2 is a perspective view showing the external appearance of the three-dimensional printing apparatus 100. The three-dimensional modeling apparatus 100 includes a control unit 20, a powder supply unit 30, a head unit 40 that performs application, ultraviolet irradiation, and color ink application of an ultraviolet curable resin as a powder extension / binder, and a modeling unit 50 (these control units 20,
The powder supply unit 30, the head unit 40, and the modeling unit 50 will be described later. ) Is provided, and a cover 10a that covers the modeling portion 50 provided on the upper side of the housing is provided.

The cover 10a is formed of a transparent material such as glass or acrylic resin, and is configured so that the situation during molding can be visually recognized. Further, the cover 10a is subjected to a process of shielding ultraviolet rays emitted during molding. Further, when the cover 10a is opened during the molding, the ultraviolet irradiation is immediately stopped, and the head unit 40 waits at a predetermined position.

A liquid crystal display (LCD) 11, operation switches 12, and an opening 13 for the recording medium 3 are arranged on the front side of the housing 10, and a digital input / output terminal 14 is provided on the side. The liquid crystal display 11 is used as a means for displaying an operation guide screen when performing an operation input and a means for displaying the operation status of the three-dimensional printing apparatus 100. The digital input / output terminal 14
S232C terminal, SCSI terminal or IEEE139
It is a general-purpose terminal such as four terminals.

FIG. 3 shows a main part of the three-dimensional molding apparatus 100 which performs a molding process, that is, a powder supply section 30, a head section 40,
And the modeling part 50 are shown.

As shown in FIG. 4, the powder supply unit 30 has a function of storing the powder 31 and a function of supplying a predetermined amount of the powder 31 to the secondary hopper 471 (FIG. 5) of the head unit 40. ing. The powder supply unit 30 includes a primary hopper 32, a rotor 3
3 and an agitator 34, and the amount of powder supplied to the secondary hopper 471 is controlled by controlling the number of rotations of the rotor 33. Agitator 34
Is adapted to prevent the powder 31 from blocking due to rotation. Regarding the powder 31,
In order to improve the color development, it is preferable to use a white color. When printing on white paper, for example, applying colored ink only to the colored areas enables gradation expression of the color in balance with the white background, but the same applies to the coloring of three-dimensional objects. Therefore, it is desirable to use a white powder material. Further, in the present embodiment, a rotary supply mechanism is shown as the powder supply unit 30, but a supply mechanism of a vibration type, a rotating blade type, a belt type, or the like may be used.

As shown in FIG. 5, the head section 40 comprises an ink jet head section 41, an ultraviolet irradiation section 46, and a powder extending section 47. In the present embodiment, the head unit 40 is a single X-direction moving unit for reciprocating the entire inkjet head unit 41, the ultraviolet irradiation unit 46, and the powder extending unit 47 in the X direction (the left-right direction in the drawing) in the horizontal plane. 49 (FIG. 6) to move integrally. The X-direction moving portion 49 is configured to be able to reciprocate in the X direction along a guide rail (not shown) extending in the X direction.

However, when finer movement / speed control is required, an X-direction moving mechanism may be provided in each of the inkjet head unit 41, the ultraviolet irradiation unit 46, and the powder extending unit 47, and may be driven separately.

The ink jet head unit 41 includes a tank 4 containing an ultraviolet curable resin serving as a binder for binding the powder, and a plurality of inks for coloring the combined powder.
3, a nozzle 44 for discharging the ultraviolet curable resin or ink in the tank, and a reciprocating movement of the tank 43 and the nozzle 44 in the Y-axis direction (front and back directions on the paper surface) orthogonal to the X axis and in the same horizontal plane as the X axis. And an ink jet head Y-direction moving unit 45 for the purpose. Y direction moving unit 4
5 is a Y that can move in the X direction together with the X direction moving section 49.
It is designed to be able to reciprocate in the Y direction along a guide rail (not shown) extending in the direction.

More specifically, the tank 43 includes a plurality of tanks (four tanks in this example) 43a to 43d each containing ink of a different color, and a tank 43e for ultraviolet curable resin. Specifically, the three primary colors Y (yellow), M (magenta), and C (cyan) and W (white) ink are stored in the respective tanks 43a to 43d. Each ink that is a colorant does not discolor even when combined with the powder material, and it is desirable to use an ink that does not discolor or fade even after a long time. Generally, it is sufficient to mix the three primary colors of Y, M, and C in order to perform coloring. However, in order to express light and shade (gradation), it is necessary to eject white ink in addition to the three primary colors and mix the colors. Becomes effective. In general printers and the like, characters and images are printed on white paper with ink, toner, and the like. Therefore, if the white color of the base paper is used, white ink is not required.
By using only the three colors of C, the shading of each color component can be expressed in principle. However, when the color of the powder used as the material for the three-dimensional printing is not white, it is particularly effective to use a white ink.

A tank 48 for replenishing the ultraviolet curable resin is connected to the tank 43e for the ultraviolet curable resin, and the ultraviolet curable resin can be replenished by a pump (not shown). As the ultraviolet curable resin, it is preferable to use a resin having a low viscosity such as an acrylic monomer resin having a low molecular weight so that the resin can be discharged using an ink jet head. Note that an epoxy-based resin or the like may be used as the ultraviolet curable resin.

The nozzle 44 is connected to the ink jet head 4
1 and is movable with respect to the Y direction integrally with the inkjet head Y direction moving section 45. The nozzle 44 includes the same number of discharge nozzles 44a to 44e as the number of tanks in the tank unit 43, and the discharge nozzles 44a to 44e are individually connected to the tanks 43a to 43e. Each of the discharge nozzles 44a to 44e is a nozzle that discharges an ultraviolet curable resin or ink as minute droplets by, for example, an inkjet method. Each discharge nozzle 44
The discharge of the ultraviolet curing resin or ink by a to 44e is as follows.
The ultraviolet curable resin or ink is individually controlled by the inkjet head driving unit 241 (FIG. 6), and adheres to a powder layer (described later) of the modeling unit 50 provided at a position facing the nozzle 44.

As described above, the ink jet head unit 41 can be moved in the plane defined by the X axis and the Y axis by the X direction moving unit 49 and the Y direction moving unit 45. The X-direction moving unit 49 and the Y-direction moving unit 45 can move the inkjet head unit 41 to an arbitrary position within the driving range on the XY plane based on the driving signal from the control unit 20. Then, the inkjet head driving unit 241 performs a plurality of ejection nozzles 44a to 44e in accordance with the position of the nozzle 44 on the XY plane.
The ultraviolet curable resin or the ink is selectively ejected from among them, and the ultraviolet curable resin or the ink is applied to a necessary portion of the powder layer of the modeling section 50.

The nozzles 44a to 44e may be moved independently in the X and Y directions instead of integrally. Also, for each of the tanks 43a to 43e,
A plurality of nozzles may be provided along the front and back directions in FIG.

The ultraviolet irradiator 46 has a function of irradiating ultraviolet rays to cure the ultraviolet curable resin and bind the powder. The ultraviolet irradiation unit 46 can be moved in the X direction by the X direction moving unit 49 together with the inkjet head unit 41. Alternatively, as described above, it may be possible to independently move in the X direction.
The ultraviolet irradiation section 46 also has a Y-direction moving section 242 (FIG. 6).
To allow independent movement in the Y direction. For example, an ultraviolet LED as a light source of the ultraviolet irradiation unit 46
Is used, and a required portion of the powder layer is irradiated with ultraviolet rays in a spot shape. An ultraviolet lamp extending in the Y direction may be used as a light source of the ultraviolet irradiation unit, and the movement of the ultraviolet irradiation unit in the Y direction may be omitted.

The powder extending section 47 comprises a secondary hopper 471, a shutter 472, a blade 473, and an extending roller 474. These members 471, 472, 473,
474 extends along the Y direction. The powder extending unit 47 stores the powder necessary for forming one more powder layer supplied from the powder supply unit 30 in the secondary hopper 471, and opens the shutter 472 at a predetermined position to open the powder. Is to be dropped. When the powder extending section 47 is moved in the X direction by the X direction moving section 49, the thrown powder is extended by the blade 473 and the rotating extending roller 474, and a uniform powder layer is created. It is like that.

Returning to FIG. 3, the modeling unit 50 includes a modeling unit main body 51 having a concave portion, a modeling stage 52 provided to form the bottom surface of the concave portion of the modeling portion 51, and a modeling stage 52. A Z-direction moving unit (modeling stage elevating mechanism) 53 for moving in the Z direction (perpendicular to the XY plane) is provided. The modeling unit 50 plays a role of providing a work area for creating a modeled object using powder.

The modeling unit main body 51 supplies powder from the primary hopper 32 to the secondary hopper 471 at the upper left end thereof, and drops the powder from the secondary hopper 471 at the upper right end thereof. It is designed to hold the body temporarily.

The modeling stage 52 has a rectangular shape in the XY section, and its side surface is in contact with the vertical inner wall 51 a of the concave portion in the modeling portion main body 51.

The Z-direction moving section 53 has a support rod 53a connected to the molding stage 52 and a drive section 53b for moving the support rod 53a in the vertical direction.
The modeling stage 52 connected to the support bar 53a can be moved up and down along the Z direction by moving the 3a in the vertical direction by the driving unit 53b.

The rectangular three-dimensional space (space of the concave portion) formed by the modeling stage 52 and the vertical inner wall 51a of the modeling section main body 51 functions as a work area for creating a modeling object. Then, a thin layer of powder is sequentially formed for each layer on the modeling stage 52, and a sequence of discharging an ultraviolet curable resin, curing the resin by irradiating ultraviolet rays, and discharging ink is performed for each layer. Accordingly, a required part of the powder is joined and colored to form a modeled object.

FIG. 6 is a block diagram showing a functional configuration of the three-dimensional printing system 1. Data or the like created on the host computer 2 side is input to the interface 21 from the host computer 2 via the digital input / output terminal 14 or to the interface 21 from the recording medium 3.

Control unit 2 for controlling the three-dimensional printing apparatus 100
0 has the same function as a general-purpose computer. The system controller 201 includes the powder supply unit 30, the head unit 4
0, control for the X-direction moving unit 49 and the modeling unit 50 is performed.

The system controller 201 sends a driving motor 2 for driving the rotor 33 to the powder supply section 30.
31, a drive motor 232 for driving the agitator 34 is controlled. For the head unit 40, the inkjet head driving unit 24 that drives the inkjet head unit 41
1. The Y-direction moving unit 45 for the inkjet head, the powder extending unit 47, the lighting control unit 243 for turning on the ultraviolet light source of the ultraviolet irradiation unit 46, and the Y-direction moving unit 242 for the ultraviolet irradiation unit are controlled.

The system controller 201 controls the X-direction moving unit 49 by controlling the X-direction drive motor 248 to detect the position in the X direction.
HP (Home Positio) that detects a reference position in the X direction
n) Receive a signal from the sensor 245. For the modeling unit 50, a drive motor 251 that drives the modeling stage elevating mechanism 53 is controlled.

The system controller 201 gives the character generator 203 an instruction to display appropriate characters and symbols on the screen of the liquid crystal display 11 and receives input information from the operation switch 12. It is configured to be able to.

(Roles and Features of Section Data of Host Computer and 3D Modeling Apparatus from Creation of Section Data to Forming) Table 1 shows section data of an object to be formed from 3D image data of the object. And the host computer 2 until the modeling based on this data
And the roles and features of the three-dimensional printing apparatus 100 are divided into four parts.

First, the case of Table 1 (a) will be described. The host computer 2 sequentially transmits to the three-dimensional modeling apparatus 100 while sequentially creating cross-sectional data of the object to be molded from the three-dimensional image data of the modeling object.

More specifically, the host computer 2
Creates cross-sectional data for each cross-section obtained by slicing a modeling object horizontally in three-dimensional image data. The cross-sectional data is created at a pitch (layer thickness t) corresponding to the thickness of one layer of powder to be laminated. This pitch can be changed within a predetermined range (the range of the thickness capable of binding the powder).

FIG. 7 is a diagram showing an example of the created section data. As shown in FIG. 7, shape data and color data are created as cross-sectional data from three-dimensional image data. The shape data is data representing a region where the ultraviolet curable resin is applied. In addition, the color data is data indicating a color region to which ink is applied as described above, and only data corresponding to a portion that appears on the surface of the three-dimensional structure is
It has YCMW color information.

After sequentially receiving the cross-sectional data, the three-dimensional modeling apparatus 100 performs modeling based on the data. In this case, the three-dimensional printing apparatus 100 does not require a function of creating cross-sectional data, so that the load is reduced. Further, the memory capacity of the host computer 2 may be minimum. However, since the entire cross-sectional image data cannot be checked in advance, if there is an error at the end of the data, the modeling up to that point becomes useless.

Next, the case of Table 1 (b) will be described.
The host computer 2 collectively creates cross-sectional data of the object to be modeled from the three-dimensional image data of the modeling object, and sequentially transmits the data to the three-dimensional modeling apparatus 100. The three-dimensional modeling apparatus 100 sequentially receives the cross-sectional data and performs modeling based on the data. In this case, the three-dimensional printing apparatus 100 does not need the function of creating the cross-sectional image data as in the case of Table 1 (a), so that the load can be reduced. The host computer 2 is not released from the task until the modeling is completed, but can always check the state during the modeling.

Next, the case of Table 1 (c) will be described.
The host computer 2 collectively creates cross-sectional data of the object to be modeled from the three-dimensional image data of the modeling object, and transmits the data to the three-dimensional modeling apparatus 100 at a time. The three-dimensional printing apparatus 100 receives a large amount of cross-sectional data, stores the data in a large-capacity memory, and then performs the printing. In this case, the host computer 2 is released from the task after transmitting the data.

Next, the case of Table 1 (d) will be described.
The host computer 2 transmits the three-dimensional image data of the modeling target to the three-dimensional modeling device 100. The three-dimensional modeling apparatus 100 creates cross-sectional data of the object to be modeled from the received three-dimensional image data of the modeling object, and performs modeling. In this case, the three-dimensional printing apparatus 100 requires a function of creating the cross-sectional data, so that the load becomes heavy. Also,
The host computer 2 has a job management function. However, it is suitable when the three-dimensional printing apparatus 100 is used like a printer in a network environment.

Table 1

(Processing by Host Computer) FIG.
9 is a flowchart relating to a processing procedure in the host computer 2. First, three-dimensional image data of a modeling object is input (step S1). Next, parameters relating to modeling are input (step S2). Here, information such as a modeling size and a slice pitch is input. In step S3, a data check is performed. When the three-dimensional image data is in the STL format or the VRML format, only the information on the surface of the object is described. It is checked whether the surface information is consistent as a solid object. Here, a check is made as to whether the vertices are composed of a plurality of vertices or solely (that is, whether or not the vertices are closed), phase compensation of the surface (that is, whether the front and back of the surface are inverted), and the like.

In step S4, a data error check is performed. If there is no error in the data check in step S3, the process proceeds to step S6, and if there is an error, the process proceeds to step S5. In step S5, the data is corrected. Since a portion where an error has occurred is displayed as a warning, the data is corrected sequentially in an interactive manner. Through the above processing, surface data indicating a closed space is obtained. Then, in step S6, the data is solidified. That is, information indicating which side of the closed space is clogged is added.

In step S7, cross-section data creation and data transmission are performed according to each case shown in Table 1.

FIG. 9A shows a flow in the case of Table 1 (a). First, the molding parameters are transmitted in step S711. In step S712, one section data is created from the data-corrected three-dimensional image data. If preparation of the modeling apparatus is OK (step S713), one section data is transmitted in step S714. In the next step S715, since the cross-sectional data amount is known in advance,
If all data has been transmitted, the process ends. If data remains, steps S712, S713, S71
Repeat step 4. The section data creation step will be described later in detail with reference to FIG.

FIG. 9B shows a flow in the case of Table 1 (b). First, in step S721, the molding parameters are transmitted. In step S722, cross-section data is collectively created from the data-corrected three-dimensional image data. If the preparation of the modeling apparatus is OK (step S723), the process proceeds to step S724.
Then, one section data is transmitted. Next step S72
In step 5, since the cross-sectional data amount is known in advance, the process is terminated if all data has been transmitted, and steps S723 and S724 are repeated if data remains.

FIG. 9C shows a flow in the case of Table 1 (c). First, in step S731, the molding parameters are transmitted. In step S732, the section data is collectively created from the data-corrected three-dimensional image data. In the next step S733, the cross-sectional data is transmitted collectively and the processing ends.

FIG. 9D shows a flow in the case of Table 1 (d). First, in step S741, the molding parameters are transmitted. In step S742, the data-corrected three-dimensional image data is transmitted, and the process ends.

Returning to FIG. 8, when the data transmission is completed and the end command from the three-dimensional printing apparatus 100 is confirmed in step S8, the history information of the data is updated in step S9. This means that by adding information such as modeling parameters and data correction to a file of 3D image data, the model can be easily reproduced based on this history information at the time of the next modeling (when repeating). This is to make it possible.

(Processing in Three-Dimensional Modeling Apparatus 100) FIG. 10 is a flowchart relating to a processing procedure in the three-dimensional modeling apparatus 100.

FIG. 10A shows a flow in the case of Table 1 (a). First, in step S1011, when the system controller 201 of the control unit 20 of the three-dimensional printing apparatus 100 receives one section data, the powder supply unit 30, the head unit 40, and the X-direction moving unit 4 are based on the data.
9, and a drive signal to be transmitted to the modeling unit 50 is created. When the drive signal is transmitted in step S1012 to perform the modeling process for one layer, a signal indicating the end of the modeling process for one layer is transmitted to the host computer 2 in step S1013, and the process ends. The shaping process will be described later in detail.

FIG. 10B shows a flow in the case of Table 1 (b). In this case, similarly to FIG. 10A, when the system controller 201 of the control unit 20 receives one section data, the powder supply unit 30, the head unit 40, and the X
A drive signal to be transmitted to the direction moving unit 49 and the modeling unit 50 is created (step S1021), a modeling process for one layer is performed (step S1022), and a modeling process end signal is transmitted to the host computer 2 (step S102).
3), end.

FIG. 10C shows the flow in the case of Table 1 (c). First, in step S1031, when the system controller 201 of the control unit 20 receives the sectional data collectively, the powder supply unit 30, the head unit 40, the X-direction moving unit 49, and the molding unit 5 are based on the data of one layer.
Create a drive signal for transmission to 0. Step S1
At 032, a drive signal is transmitted to perform modeling processing for one layer.
In the next step S1033, since the cross-section data amount is known in advance, if the shaping process has been completed for all layers, a shaping process end signal is transmitted to the host computer 2 and the process ends (step S1034). If remains, steps S1031 and S1032 are repeated.

FIG. 10D shows a flow in the case of Table 1 (d). First, in step S1041, when the system controller 201 of the control unit 20 receives the data-corrected three-dimensional image data, it creates cross-sectional data from the data-corrected three-dimensional image data. And
The powder supply unit 30 and the head unit 4 based on the cross-sectional data of one layer
0, a drive signal to be transmitted to the X-direction moving unit 49 and the modeling unit 50 is created (step S1042). In step S1043, a drive signal is transmitted to perform modeling processing for one layer. In the next step S1044, since the cross-section data amount is known in advance, if the shaping process has been completed for all layers, a shaping process end signal is transmitted to the host computer 2 and the process ends (step S1045). If there are remaining, step S1042, S
Step 1043 is repeated.

(Modeling Operation of Three-Dimensional Modeling Apparatus) Next, FIG.
The modeling operation of the three-dimensional modeling apparatus 100 will be described with reference to 1 to 14.

First, the head section 40 is disposed at the upper left end of the modeling section main body 51, and the powder supply section 30 supplies the powder 31 to the secondary hopper 471 (FIG. 11A).

Next, the head section 40 is moved to the X-direction moving section 49.
(Fig. 6) along with a guide rail (not shown)
The head moves in the X direction to the upper right end of the modeling unit main body 51, which is the initial position [FIG. 11B]. At this time, the modeling stage 52 is arranged at the same height as the upper end position of the modeling section 50.

Subsequently, the powder 31 is dropped from the secondary hopper 471 at the upper right end of the modeling unit main body 51, and the modeling stage 52 is moved by the Z-direction moving unit 53 to the layer thickness input from the host computer 2. Based on t
It is lowered and held by a distance corresponding to its thickness [FIG. 12 (c)].

The head section 40 moves in the −X direction to supply the powder 31 as a material in the formation of the three-dimensional model, while the blade 473 and the extension roller 474 supply the powder 31. One thin layer is formed (powder layer 80), and the ink jet head 4
The required portion 82 of the powder 31 is joined by discharging the ultraviolet curable resin from 1 to a predetermined region [FIG.
(D)].

The amount of the powder material supplied from the powder supply unit 30 during the formation of one layer (during one movement in the −X direction) is the amount required for the formation of one layer. It is set slightly higher than that to avoid running out of powder during molding. For this reason, after one layer is formed, the powder material remains, but the surplus powder material is discharged by the blade 473 and the extension roller 474 that move along the −X direction, and −
In the X direction, it falls from a powder recovery port (not shown) arranged between the modeling stage 52 and the upper left end of the modeling unit main body 51.

When the head section 40 moves in the −X direction, the ultraviolet irradiation section 46 irradiates the powder layer 80 with ultraviolet rays. As a result, the binder of the ultraviolet curable resin applied to the powder layer 80 is cured, and the combined body 82 of the powder material is formed. The powder in the region where the binder is not applied can be removed later.

When the head section 40 reaches the upper left end of the molding section main body 51, one joining operation of the powder material is completed, and the molding of one layer is completed [FIG.
(E)].

Then, the powder 31 is again put in the secondary hopper 471.
Is supplied, the head section 40 moves in the + X direction, and ejects ink of each color from the inkjet head section 41 to the combined body 82 of the powder material formed by curing the binder by the irradiation of the ultraviolet rays. [FIG. 13 (f)]. Specifically, ink is applied to a coloring region near the surface of the three-dimensional structure, whereby the three-dimensional structure is colored. In this case, it is preferable to irradiate ultraviolet rays from the ultraviolet irradiating section 46 in order to surely cure the ultraviolet curable resin applied to the powder layer 80. When the head section 40 moves in the + X direction, the powder layer 80 is slightly lowered, and
It is preferable to prevent the contact between the powder layer 74 and the powder layer 80.

When the head section 40 reaches the upper right end of the molding section main body 51 (FIG. 14 (g)), the molding stage 52
It descends by a distance corresponding to the layer thickness t. Thus, a space for forming a new powder layer for one layer can be formed above the powder layer 80 in which the necessary bonding by the binder has been completed.

Then, the steps shown in FIGS. 12C to 14G are repeated to complete the modeled object 84 [FIG.
(H)].

(Color Management) As described above,
It is known that even if the same three-dimensional image data is used, if the conditions of modeling (for example, materials used for modeling) are different, the color tone of the formed model is different. Therefore, in the present invention, the color data of the cross-sectional data obtained from the three-dimensional image data is corrected in accordance with the molding conditions, so that a molded article having a stable color tone is always obtained.

The shaping conditions that cause fluctuations in the color reproduction of the shaping object include materials (powder, binder, etc.) for shaping, coloring agents, and the degree of inclination of the surface of the shaping object with respect to the work area when the shaping part is formed. (In other words, the angle formed by the direction vector in the stacking direction and the outward normal vector on the surface of the object (the direction opposite to the inside of the object)), the degree of bleeding due to the difference in the area of the colored portion of the same color. , The thickness per layer of powder, and the like. If these values change, the color development of the obtained molded article differs even with the same three-dimensional image data.

For example, in the molded article shown in FIG. 15A, the color developing property is different between a portion where ink can be directly applied by the ink jet head (for example, region A) and a portion where ink cannot be directly applied (for example, region B). In order to color the region B, a method of applying a colorant on the powder layer a1 and attaching the colorant to the lower surface of the cured portion of the powder layer a2, or applying ink on the powder layer a2, Can penetrate to the lower surface of the powder layer a2 and then cure the powder layer a2. In any case, even if the ink is discharged to the region B under the same conditions as the ink discharge conditions for the region A, Area B
And have different coloring properties.

The area C is where ink can be directly attached by the ink jet head.
When viewed in detail, it is formed stepwise as shown in FIG. In order to color the vertical portion D of the stairs, a method is conceivable in which ink adhered to the upper surface portion E of the powder layer a3 penetrates the powder layer a3, and the like (the upper surface portion E is shown in the drawing). As described above, the ink is more likely to adhere to the vertical portion D if it extends outside the cured portion.)
However, even when the ink is ejected to the area C under the same conditions as the ink ejection conditions for the area A, the coloring properties are different between the area A and the area C.

Therefore, using the model data for calibration as the three-dimensional image data, the color development of the modeled object when the color modeling is performed by changing the conditions of the color reproducibility variation is measured by the colorimeter 104 (FIG. 1). . For example, in order to obtain a relationship between color data and colorimetric data on the degree of inclination of the surface of a modeled object to be created with respect to a work area, spherical data is used as three-dimensional image data, and the spherical surface of the modeled object after color modeling. A colorimeter 104 performs colorimetry for all of them. As described above, the relationship between the color data and the colorimetric data is created as a color correction table for the conditions that cause the color reproduction of the modeled object to fluctuate. This table is shown in Tables 1 (a)-
When the section data is created on the host computer 2 side as shown in (c), the control unit 2a of the host computer 2
May be stored in the control unit 20 of the three-dimensional printing apparatus 100. As shown in Table 1 (d), when creating the cross-sectional data on the three-dimensional printing apparatus 100 side, it is stored in the control unit 20 of the three-dimensional printing apparatus 100.

Next, the section data creation step using the color correction table is described in FIG. 9 corresponding to the case of Table 1 (a).
Description will be made with reference to FIG. 16 taking the step S712 of FIG. First, in step S151, shape data is created from three-dimensional image data. Next, in step S152, color data is created from the three-dimensional image data. And
In step S153, referring to a color correction table representing the relationship between the color data and the colorimetric data of the modeled object regarding the modeling conditions such as the colorant to be used, the color data created in step S152 is corrected in step S154. Based on the corrected color data, a drive signal for driving the ink-jet head unit 41 of the head unit 40 is created so that a model having a constant color tone can be formed irrespective of modeling conditions (step in FIG. 10A). See S1011).

The color data for driving the ink-jet head unit 41 in the three-dimensional printing apparatus 100 is obtained by converting the YMCW color data into 256 levels from 0 to 255 (8 steps).
Bit). On the other hand, color data (three-dimensional image data) is generated on the host computer 2 side.
When handling YMCW data as
On the 0 side, the color data transmitted from the host computer 2 may be used as it is. In this case, when outputting to the display 2b (FIG. 1), it is converted into RGB data. When the host computer 2 handles RGB data as color data (three-dimensional image data), the host computer 2 converts the color data (RGB data) into YMCW data.
Whether it is converted to data and transmitted to the three-dimensional modeling apparatus 100,
Alternatively, the host computer 2 side receives the color data (RG
B data), and the three-dimensional modeling apparatus 100 side transmits the YMC
It is necessary to convert to W data. In this case, when outputting to the display 2b, three-dimensional image data, which is RGB data, may be used as it is.

FIG. 17 shows a control unit 2 of the host computer 2 for correcting color data using the color correction table.
It is a block diagram showing one embodiment of a. This embodiment corresponds to the cases of Tables 1 (a) to 1 (c). C of control unit 2a
A PU (Central Processing Unit) 300 has a three-dimensional image data storage unit 302 and a section data creation unit (having the functions of a modeling control data creation unit and a coloring control data creation unit) 3.
04, section data storage means 306, color correction table creation means 308, color correction table storage means 310, color data correction means 312, and modeling condition input means 314 are connected.

The color correction table creating means 308 creates a modeled object from the calibration model data and, based on the colorimetric data obtained by measuring the color of the modeled object, a shaping condition causing a change in the color reproduction of the modeled object. Is to create in advance a relationship between the color data and the colorimetric data of the object to be colored based on the data as a color correction table. This color correction table is stored in the color correction table storage unit 310.

The molding condition storage means 314 stores conditions (eg, molding size, thickness per powder) inputted as molding parameters (for example, see step S2 in FIG. 8).
Among the conditions for changing the color reproducibility (for example, the thickness per one powder).

The color data correction means 312 calculates modeling conditions (for example, the degree of inclination of the surface of the modeled object with respect to the work area) that cause a change in color reproduction based on the cross-sectional data stored in the cross-sectional data storage unit 306. It is.

According to this configuration, the three-dimensional image data is read from the three-dimensional image data storage means 302, the cross-section data (shape data and color data) is generated by the cross-section data generation means 304, and stored in the cross-section data storage means 306. Let it. The color data correction means 312 is based on the shaping conditions (for example, a powder material used) which causes a change in color reproduction stored in the shaping condition storage means 314 and the cross-section data stored in the cross-section data storage means 306. The section data storage unit 306 is referred to by referring to the color correction table stored in the color correction table storage unit 310 based on the modeling conditions that cause the calculated color reproduction to vary (for example, the degree of inclination of the surface of the modeled object with respect to the work area). Of the cross-section data stored in the section.

When the corrected color data is RGB data, the data is converted to YMCW data by the data conversion means 316 and then transmitted to the three-dimensional printing apparatus 100.

(Other Embodiments) Regarding the coloring in the above embodiment, it is not essential to perform coloring with ink, and coloring may be performed with toner or the like.

[0098] It is not necessary to measure the color developability of the molded article using a colorimeter, and the user may visually confirm and create a correction table.

As for the binder of the above embodiment, it is not essential to use one that cures in response to light having a wavelength in the ultraviolet region, such as a UV-curable resin. A liquid that cures in response to light of a wavelength may be used, or a liquid that cures in response to a specific heat energy, such as a thermosetting resin, may be used. Further, a material which is cured by drying may be used. In this case, an ultraviolet irradiation unit or the like is unnecessary.

When a visible light curable resin is used, a means for irradiating light having a wavelength in the visible region is provided in place of the above-mentioned ultraviolet irradiation part. When a thermosetting resin is used, a heater that emits thermal energy is provided instead of the above-described ultraviolet irradiation unit.

The present invention is not limited to a molding apparatus in which powder material layers are selectively bonded by a binder and the bonded powder material layers are sequentially laminated, but also reacts to a specific energy (for example, light or heat). The present invention can also be applied to a modeling apparatus in which energy is selectively supplied to a layer of a material to be hardened to harden the material layer, and the layers of the hardened material are sequentially laminated. Further, the present invention is not limited to modeling by lamination, so-called rapid prototyping,
The present invention is applicable to general three-dimensional modeling for creating a colored three-dimensional model based on three-dimensional image data.

[0102]

According to the present invention, it is possible to always produce a molded product having a stable color tone even when the molding conditions such as the material used are changed.

[Brief description of the drawings]

FIG. 1 is a diagram showing an overall configuration of a three-dimensional printing system.

FIG. 2 is a perspective view showing the appearance of a three-dimensional printing apparatus.

FIG. 3 is a schematic cross-sectional view showing a main part of the three-dimensional printing apparatus that performs a printing process.

FIG. 4 is a schematic sectional view of a powder supply unit.

FIG. 5 is a schematic sectional view of a head unit.

FIG. 6 is a block diagram of a three-dimensional printing system.

FIG. 7 is a diagram showing an example of cross-sectional data.

FIG. 8 is a flowchart showing processing of the host computer.

FIG. 9 is a flowchart showing a section data creation / transmission step of FIG. 8;

FIG. 10 is a flowchart showing processing of the three-dimensional printing apparatus.

FIG. 11 is a schematic cross-sectional view illustrating a forming process of the three-dimensional forming apparatus.

FIG. 12 is a schematic cross-sectional view illustrating a forming process of the three-dimensional forming apparatus.

FIG. 13 is a schematic cross-sectional view illustrating a forming process of the three-dimensional forming apparatus.

FIG. 14 is a schematic cross-sectional view illustrating a forming process of the three-dimensional forming apparatus.

FIG. 15 is a schematic cross-sectional view for explaining that the color development after modeling differs depending on the degree of inclination of the surface of the modeled object with respect to the work area even under the same ink discharge conditions.

FIG. 16 is a flowchart showing a section data creation step using a color correction table.

FIG. 17 is a block diagram showing an embodiment of a control unit of a host computer for correcting color data using a color correction table.

[Explanation of symbols]

1: three-dimensional modeling system, 2: host computer, 3
0: powder supply section, 40: head section, 41: inkjet head section, 43a to 43d: ink tank, 43
e: tank for ultraviolet curing resin, 46: ultraviolet irradiation part, 4
7: powder extension part, 50: modeling part, 52: modeling stage,
100: three-dimensional modeling device, 104: colorimeter.

Claims (28)

[Claims] 1. A coloring three-dimensional modeling system for creating a colored object from shape data and color data, comprising: a molding means for creating a molded object made of a predetermined material; and the molding based on the shape data. Modeling control data creating means for creating modeling control data for controlling the means, coloring means for applying a colorant to each part of the modeled object, and coloring for controlling the coloring means based on the color data Coloring control data creating means for creating control data, wherein the coloring control data creating means comprises: a color data and a color development of a molded object to be colored based on the data for a condition that causes a change in color reproduction of the molded object. Storage means for storing a color correction table representing a relationship with the color, and correction means for correcting the color data based on the color correction table. Colored three-dimensional modeling system that. 2. A method according to claim 1, wherein layers of a predetermined material are sequentially laminated.
In a coloring three-dimensional printing system that creates a colored printed object by performing coloring for each material layer, a layer forming unit that sequentially forms the material layers, and a coloring agent is applied to a colored region of each material layer. Coloring means, and a cross-sectional data creating means for creating a plurality of sectional data corresponding to each material layer for expressing a three-dimensional structure, wherein each of the sectional data has shape data and color data, A layer forming unit that forms each of the material layers based on the shape data; a coloring unit that applies a colorant to a colored region of each material layer based on the color data; A storage unit configured to store a color correction table that represents a relationship between color data and the coloring property of a molded object that is colored based on the data, for a condition that causes a change in color reproduction of the molded object; Based on the correction table, color three-dimensional modeling system, characterized in that it comprises a correcting means for correcting the color data generated by said section data producing means. 3. The three-dimensional modeling system according to claim 1, wherein the condition that causes a change in the color reproduction is the material for forming the modeled object. 4. The coloring three-dimensional printing system according to claim 1, wherein the condition that causes a change in color reproduction is the colorant. 5. The three-dimensional modeling system according to claim 1, wherein said coloring means is an ink jet head for discharging a coloring agent from a direction substantially perpendicular to each material layer. 6. The condition according to claim 5, wherein the condition causing a change in color reproduction is an angle between a direction vector in a stacking direction and an outward normal vector of a surface of a modeled object to be formed. Coloring 3D modeling system. 7. A coloring three-dimensional molding method for producing a colored molded object from shape data and color data, comprising: a molding step of producing a molded object composed of a predetermined material using molding means; A modeling control data creating step of creating modeling control data for controlling the modeling means, a coloring step of applying a coloring agent to each part of the molded article using a coloring means, based on the color data A coloring control data creating step of creating coloring control data for controlling the coloring means, wherein the coloring control data creating step includes: A coloring three-dimensional printing method including a correction step of correcting the color data based on a color correction table representing a relationship with the coloring property of a formed article colored based on the three-dimensional printing. Method. 8. A method of sequentially laminating layers of a predetermined material,
In a coloring three-dimensional modeling method of creating a colored molded article by performing coloring for each material layer, a layer forming step of sequentially forming the material layers, and applying a coloring agent to a coloring region of each material layer A coloring step, including a cross-section data creation step of creating a plurality of cross-section data corresponding to each material layer for expressing a three-dimensional structure, wherein each of the cross-section data has shape data and color data, In the layer forming step, based on the shape data,
Each of the material layers is formed, and in the coloring step, a coloring agent is applied to a coloring region of each of the material layers based on the color data. The coloring three-dimensional modeling method further includes a step of changing the color reproduction of the modeled object. A step of correcting the color data created in the cross-section data creation step based on a color correction table representing a relationship between the color data and the color developing property of a molded object colored based on the data. A three-dimensional modeling method characterized by: 9. The coloring three-dimensional modeling method according to claim 7, wherein the condition that causes a change in color reproduction is the material for forming a modeling object. 10. The condition that causes a change in color reproduction is as follows:
9. The coloring three-dimensional forming method according to claim 7, wherein the coloring agent is used. 11. The three-dimensional modeling according to claim 7, wherein in the coloring step, a coloring agent is discharged from a direction substantially perpendicular to each of the material layers via an inkjet head serving as coloring means. Method. 12. The condition that causes a change in color reproduction is as follows:
12. The three-dimensional modeling method according to claim 11, wherein the angle is formed between a direction vector in a stacking direction and an outward normal vector of a surface of the modeled object to be formed. 13. A data processing apparatus used in a coloring three-dimensional printing system for creating a colored object from shape data and color data, wherein the data processing device is configured to control a molding means for creating an object based on the shape data. Molding control data creating means for creating modeling control data, Based on the color data, having a coloring control data creating means for creating coloring control data for controlling the coloring means for coloring the molded object, Storage means for storing a color correction table representing a relationship between color data and color development of a molded article colored based on the data, with respect to a condition causing variation in color reproduction of the molded article; A data processing device comprising: a correction unit configured to correct the color data based on the color correction table. 14. A data processing apparatus used in a coloring three-dimensional printing system for sequentially forming layers of a predetermined material and coloring each material layer to create a colored printing object. Cross-sectional data generating means for generating a plurality of cross-sectional data corresponding to each material layer for exposing; each of the cross-sectional data has shape data and color data; and the shape data forms each of the material layers. The color data is used for coloring each of the material layers, and the data processing device further includes a condition that causes a change in color reproduction of the modeled object, based on the color data and the data. A storage unit for storing a color correction table representing a relationship with the coloring property of the modeled object to be colored; and a section created by the cross-section data creating unit based on the color correction table. The data processing apparatus characterized by comprising a correction means for correcting the chroma data. 15. The condition that causes a change in color reproduction is as follows:
15. The data processing device according to claim 13, wherein the material is a material for forming a modeled object. 16. The condition that causes a change in color reproduction is as follows:
15. The colorant according to claim 13, wherein the colorant is a colorant.
Data processing equipment. 17. The condition that causes a change in color reproduction is as follows:
15. The data processing apparatus according to claim 13, wherein an angle formed between a direction vector in a stacking direction and an outward normal vector of a surface of a modeled object to be formed. 18. A data processing method used in a coloring three-dimensional modeling system for creating a colored modeled object from shape data and color data data, wherein a shaping unit for creating a modeled object based on the shape data is controlled. A modeling control data creating step of creating modeling control data, and based on the color data, including a coloring control data creating step of creating coloring control data for controlling a coloring unit that performs coloring on a molded article, The coloring control data creating step includes, for a condition that causes a change in color reproduction of the modeled object, based on a color correction table that represents a relationship between color data and the coloring property of the modeled object colored based on the data. A data processing method comprising a correction step of correcting data. 19. A data processing method used in a coloring three-dimensional modeling system for sequentially forming layers of a predetermined material and coloring each of the material layers to create a colored modeling object. A cross-sectional data generating step of generating a plurality of cross-sectional data corresponding to each material layer for exposing; each of the cross-sectional data has shape data and color data; and the shape data forms each of the material layers. The color data is used for coloring each of the material layers, and the data processing method further includes a condition for causing a change in color reproduction of the modeled object, based on the color data and the data. A correction step of correcting the color data created in the cross-section data creation step based on a color correction table representing a relationship with the coloring property of the modeled object to be colored. Characteristic data processing method. 20. A condition that causes a change in color reproduction,
20. The data processing method according to claim 18 or 19, wherein the material is a material for forming a modeled object. 21. A condition that causes a change in color reproduction,
20. The colorant according to claim 18, wherein the colorant is used.
Data processing method. 22. A condition that causes a change in color reproduction,
20. The data processing method according to claim 18, wherein an angle between a direction vector in the stacking direction and an outward normal vector of the surface of the object to be formed is formed. 23. A data processing program used in a coloring three-dimensional printing system for creating a colored printing object from shape data and color data, wherein the coloring three-dimensional printing system creates a printing object composed of a predetermined material. Modeling means; modeling control data creating means for creating modeling control data for controlling the modeling means based on the shape data; coloring means for applying a coloring agent to each part of the shaped article; and the color data A coloring control data creating means for creating coloring control data for controlling the coloring means, based on the color data. Storage means for storing in advance a color correction table representing a relationship between the color correction table and a coloring property of a molded object colored based on the data; A correction means for correcting the color data, wherein the data processing program causes a molding control data creating means to create the molding control data from the shape data, and the color correction recorded in the storage means. A data processing program for reading a table, and causing the correction means to correct the color data based on the color correction table. 24. A data processing program for use in a coloring three-dimensional modeling system for sequentially forming layers of a predetermined material and coloring each of the material layers to create a colored three-dimensional modeling object. The system includes a cross-sectional data creating unit that creates a plurality of cross-sectional data corresponding to each material layer for expressing a three-dimensional structure, wherein each of the cross-sectional data has shape data and color data, Is used to form each of the material layers, the color data is used to color each of the material layers, and the color three-dimensional modeling system further includes a condition that causes a change in color reproduction of the modeled object. Storage means for storing in advance a color correction table representing a relationship between color data and the color development of a molded object colored based on the data, the color correction table Correction means for correcting the color data created in the section data creation step, wherein the data processing program comprises: a plurality of sliced three-dimensional image data of the modeled object at a predetermined pitch. Wherein the color correction table recorded in the storage means is read out, and based on the color correction table, the correction means corrects the color data created by the cross-section data creation means. Data processing program to do. 25. A condition that causes a change in color reproduction,
25. The data processing program according to claim 23, wherein the program is the material for forming a modeled object. 26. A condition that causes a change in color reproduction,
25. The colorant according to claim 23, wherein the colorant is a colorant.
Data processing program. 27. A condition that causes a change in color reproduction,
25. The data processing program according to claim 23, wherein the angle is an angle between a direction vector in the stacking direction and an outward normal vector of the surface of the object to be formed. 28. A recording medium on which the data processing program according to claim 23 is recorded.