JP2016147447A - Three-dimensional molding apparatus, production method, and computer program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide such technology that a three-dimensional object can be molded with high accuracy in a three-dimensional molding apparatus for molding a three-dimensional object by discharging a liquid.SOLUTION: A three-dimensional molding apparatus 100 for molding a three-dimensional object includes a head unit 50 that discharges a liquid as a material of the object to mold the object, and a control unit 70. The control unit 70 controls the head unit 50 to mold a body part of the object with first resolution and to mold a correction part to correct a shape of the body part with second resolution that is higher than the first resolution.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a three-dimensional modeling apparatus.

In recent years, three-dimensional modeling apparatuses using printing technology have attracted attention. For example, in the three-dimensional modeling apparatus described in Patent Document 1, an inkjet technique that is generally used in a printing technique is employed. In a three-dimensional modeling apparatus that employs ink-jet technology, the process of discharging a curable liquid (hereinafter referred to as “curing liquid”) to form a single layer of a cross-section along the horizontal direction is performed in the height direction. By performing it across the layers, modeling of a three-dimensional object is performed.

JP 2000-280354 A

In an inkjet three-dimensional modeling apparatus, the thickness of each cross-sectional body varies due to deformation due to curing shrinkage of the curable liquid, and a dimensional error may occur in the finally modeled object. Therefore, there is a need for a technique capable of accurately modeling a three-dimensional object in a three-dimensional modeling apparatus that models a three-dimensional object by discharging a liquid.

SUMMARY An advantage of some aspects of the invention is to solve at least a part of the problems described above, and the invention can be implemented as the following forms.

(1) According to one form of this invention, the three-dimensional modeling apparatus which models a three-dimensional object is provided.
The three-dimensional modeling apparatus includes: a head unit configured to model the object by discharging a liquid that is one material of the object; and controlling the head unit to model a main body portion of the object with a first resolution. ,
A control unit that forms a correction portion for correcting the shape of the main body portion of the object at a second resolution that is higher than the first resolution. With such a three-dimensional modeling apparatus, even if a dimensional error occurs in the main body portion of the three-dimensional object to be modeled, the error can be corrected with a higher resolution than the main body portion. Therefore, a three-dimensional object can be accurately modeled.

(2) In the three-dimensional modeling apparatus of the above aspect, the head unit may be capable of changing the amount of the liquid ejected per unit volume, and when the head unit models the correction portion, The amount of the liquid discharged per unit volume may be increased as compared with the case where the main body portion is formed. If it is a three-dimensional modeling apparatus of such a form, the dimensional error which arises in a main-body part can be correct | amended with higher precision.

(3) The three-dimensional modeling apparatus of the above aspect may further include a measurement unit that measures the shape of the main body portion, and the control unit may change the shape of the correction portion based on a measurement result by the measurement unit. You may specify. If it is a 3D modeling apparatus of such a form, since it can correct | amend based on the shape of the modeled main-body part, it can correct | amend with higher precision.

The present invention can be realized in various forms other than the form as a three-dimensional modeling apparatus. For example, a manufacturing method in which a three-dimensional modeling apparatus manufactures a three-dimensional object, a computer program for a computer to model a three-dimensional object by controlling the three-dimensional modeling apparatus, or a non-primary recording of the computer program It can be realized in the form of a recording medium or the like.

It is explanatory drawing which shows schematic structure of a three-dimensional modeling apparatus. It is a figure which shows the arrangement | sequence of a nozzle hole. It is a flowchart of a three-dimensional modeling process. It is explanatory drawing which shows the main-body part of the shape | molded three-dimensional object. It is a figure which shows the concept of correction data. It is explanatory drawing which shows 1st resolution and the discharge amount of the hardening liquid in 1st resolution. It is explanatory drawing which shows the 2nd resolution and the discharge amount of the hardening liquid in 2nd resolution. It is explanatory drawing which shows schematic structure of the three-dimensional modeling apparatus in 2nd Embodiment.

A. First embodiment:
FIG. 1 is an explanatory diagram showing a schematic configuration of a three-dimensional modeling apparatus as a first embodiment of the present invention. The three-dimensional modeling apparatus 100 includes a modeling unit 10, a powder supply unit 20, a flattening mechanism 30, a powder recovery unit 40, a head unit 50, a measurement unit 55, a curing energy application unit 60, and a control. Part 7
0. A computer 200 is connected to the control unit 70. The three-dimensional modeling apparatus 100 and the computer 200 can be combined and understood as a three-dimensional modeling apparatus in a broad sense. FIG. 1 shows an X direction, a Y direction, and a Z direction orthogonal to each other. The Z direction is a direction along the vertical direction, and the X direction is a direction along the horizontal direction. The Y direction is a direction perpendicular to the Z direction and the X direction. In the following, the + Z direction in FIG. 1 may be referred to as “up” and the −Z direction may be referred to as “down”.

The modeling unit 10 is a tank-shaped structure in which a three-dimensional object is modeled. Modeling part 10 is X
A flat modeling stage 11 along the Y direction, a frame 12 surrounding the modeling stage 11 and standing in the Z direction, and an actuator 13 that moves the modeling stage 11 along the Z direction.
With. The modeling stage 11 moves in the Z direction within the frame 12 by the control unit 70 controlling the operation of the actuator 13.

The powder supply unit 20 is a device that supplies powder, which is one material of a three-dimensional object, into the modeling unit 10. The powder supply unit 20 is configured by, for example, a hopper or a dispenser.

The flattening mechanism 30 flattens the powder supplied in the modeling unit 10 or on the frame body 12 by moving the upper surface of the modeling unit 10 in the horizontal direction (XY direction), and powders on the modeling stage 11. It is a mechanism for forming a body layer. The flattening mechanism 30 is configured by, for example, a squeegee or a roller. The powder pushed out from the modeling unit 10 by the flattening mechanism 30 is discharged into a powder recovery unit 40 provided adjacent to the modeling unit 10.

The three-dimensional modeling apparatus 100 according to the first embodiment uses a curable liquid (hereinafter referred to as a curable liquid) and the above-described powder as the material of the three-dimensional object. As the curable liquid, a liquid resin material mainly composed of a monomer and an oligomer to which the monomer is bonded, and a polymerization initiator that is excited when irradiated with ultraviolet light to start the polymerization by acting on the monomer or oligomer. A mixture with is used. In addition, a relatively low molecular weight monomer is selected as the monomer in the curable liquid so that the curable liquid has a low viscosity that can be discharged as droplets from the head unit 50, and is further included in one oligomer. The number of monomers is also adjusted to about several molecules. When this polymerization solution is exposed to ultraviolet light and the polymerization initiator is in an excited state, the monomers are polymerized to grow into oligomers, and the oligomers also polymerize in various places to quickly cure and become solid. Have. In the present embodiment, as a powder, on the surface,
A powder to which a polymerization initiator of a type different from that contained in the curable liquid is attached is used. The polymerization initiator attached to the surface of the powder has the property of initiating polymerization by acting on a monomer or oligomer when it comes into contact with the curable liquid. For this reason, when the curable liquid is supplied to the powder in the modeling part 10, the curable liquid penetrates into the interior of the powder and is cured by contact with the polymerization initiator on the powder surface. As a result, the curable liquid is discharged. In such a portion, the powders are in a state of being bonded by the cured liquid. In addition, when using the powder by which the polymerization initiator adhered to the surface as a powder, it is also possible to use the hardening liquid which does not contain a polymerization initiator.

The head unit 50 is a device that receives supply of the above-described curable liquid from a tank 51 connected to the head unit 50 and discharges the curable liquid to the powder layer in the modeling unit 10 along the Z direction. The head unit 50 is movable in the X direction and the Y direction with respect to the three-dimensional object that is modeled in the modeling unit 10. The head unit 50 is movable in the Z direction relative to the three-dimensional object by moving the modeling stage 11 in the modeling unit 10 in the Z direction. The head unit 50 of the present embodiment is a so-called piezo drive type droplet discharge head. A piezo-driven droplet discharge head fills the pressure chamber with fine nozzle holes with a hardening liquid and deflects the side wall of the pressure chamber using a piezo element, thereby reducing the volume of the pressure chamber. A corresponding volume of the curable liquid can be discharged as droplets. The control unit 70 described later can change the amount of the curable liquid ejected from the head unit 50 per unit volume by controlling the voltage waveform applied to the piezo element. Details of the unit volume will be described later.

FIG. 2 is a diagram illustrating an arrangement of nozzle holes 52 formed on the lower surface of the head unit 50. In the head unit 50, a plurality of nozzle holes 52 are arranged in alternate positions over two rows along the Y direction, that is, in a staggered manner, thereby forming a nozzle row. In this embodiment, the interval between the nozzle holes 52 adjacent in the Y direction is 600 dpi (dots / inch). The nozzle holes 52 are not limited to a staggered pattern, and may be arranged in a single row, for example, or in three or more rows. In the present embodiment, the head unit 50 discharges the curable liquid while moving in the X direction, and each time the discharge of the curable liquid is completed in the X direction, the head unit 50 has a width along the Y direction of the nozzle row in the Y direction. Moving. As described above, in the present embodiment, the head unit 50 discharges the curable liquid to the designated position XY coordinates by repeating the movement in the X direction and the movement in the Y direction.

The measurement unit 55 (FIG. 1) is a device that measures the shape of a shaped three-dimensional object. In the present embodiment, the measurement unit 55 is attached to the head unit 50. Therefore, the measurement unit 55 is
By moving the head unit 50 in the XY direction, it is possible to measure the dimension (height) in the Z direction of a three-dimensional object at an arbitrary XY coordinate. As the measurement unit 55, any contact type or non-contact type measurement device can be used. The measurement unit 55 may not be attached to the head unit 50.

The curing energy applying unit 60 is an apparatus that applies energy for curing the curable liquid discharged from the head unit 50. In the present embodiment, the curing energy application unit 60 is attached to the side of the head unit 50 in the −X direction. Therefore, when the curable liquid is discharged while the head unit 50 moves in the + X direction, the discharged curable liquid is cured one after another while the curing energy applying unit 60 also moves in the + X direction. In the present embodiment, the curing energy applying unit 60 irradiates ultraviolet rays as energy for curing the curable liquid.

The control unit 70 includes the actuator 13, the powder supply unit 20, and the flattening mechanism 30 described above.
And a head unit 50, a measurement unit 55, and a curing energy applying unit 60 to control a three-dimensional object. The control unit 70 includes a CPU and a memory. CPU
Each unit described above is controlled by loading a computer program stored in a memory or a recording medium into the memory and executing it. In the present embodiment, the three-dimensional modeling apparatus 1
The three-dimensional object formed by 00 has a main body portion and a correction portion. What is the correction part?
This is a portion for correcting the shape of the main body portion of the three-dimensional object. The control unit 70 controls the head unit 50 to model the main body portion at the first resolution and to model the correction portion at the second resolution that is higher than the first resolution. Details of the first resolution and the second resolution will be described later. Note that the functions of the control unit 70 may be provided on the computer 200 side.

A procedure for modeling the three-dimensional object by the three-dimensional modeling apparatus 100 will be briefly described. First, the computer 200 slices the three-dimensional data representing the shape of the three-dimensional object according to the modeling resolution (stacking pitch) in the Z direction, and generates a plurality of cross-sectional data along the XY direction. This cross-sectional data has a predetermined modeling resolution (first resolution) in the XY directions, and is represented by two-dimensional raster data in which gradation values are stored for each element. The gradation value stored in each element represents the amount of the curable liquid ejected to the XY coordinates corresponding to that element. In other words, in the present embodiment, the raster data designates the coordinates for discharging the curable liquid and the amount of the curable liquid to be discharged to the control unit 70 of the three-dimensional modeling apparatus 100.

When acquiring the cross-sectional data from the computer 200, the control unit 70 of the three-dimensional modeling apparatus 100 controls the powder supply unit 20 and the flattening mechanism 30 to form a powder layer in the modeling unit 10. Then, the head unit 50 is driven according to the cross-sectional data to discharge the curable liquid onto the powder layer, and then the ultraviolet light is irradiated by controlling the curing energy applying unit 60 toward the discharged curable liquid.
Then, the curable liquid is cured by ultraviolet light and the powders are bonded to each other, and a cross-sectional body corresponding to the cross-sectional data for one layer is formed in the modeling unit 10. When the cross section for one layer is thus formed, the control unit 70 drives the actuator 13 to lower the modeling stage 11 along the Z direction by the stacking pitch corresponding to the modeling resolution in the Z direction. When the modeling stage 11 is lowered,
The control unit 70 forms a new powder layer on the cross-section already formed on the modeling stage 11. When the new powder layer is formed, the control unit 70 receives the next cross-sectional data from the computer 200, discharges the curable liquid onto the new powder layer, and irradiates the ultraviolet light, thereby forming a new cross-sectional body. Form. As described above, when the control unit 70 receives the cross-sectional data of each layer from the computer 200, the actuator 13, the powder supply unit 20, the flattening mechanism 30, and the head unit 5.
By controlling the 0, the curing energy applying unit 60, a cross-sectional body is formed layer by layer, and a three-dimensional object is formed by laminating them.

FIG. 3 is a specific flowchart of the three-dimensional modeling process executed by the control unit 70. In the present embodiment, first, the control unit 70 models the main body portion with the first resolution according to the above-described procedure in accordance with the cross-sectional data acquired from the computer 200 (step S10).

FIG. 4 is an explanatory diagram showing a main body portion of a shaped three-dimensional object. The body portion of the shaped three-dimensional object may vary in the thickness of each layer due to deformation accompanying the curing contraction of the curable liquid, resulting in a dimensional error in the final shape. In the example shown in FIG. 4, there is a portion where the height is lower than the original design value indicated by the broken line due to a dimensional error in the Z direction.

After performing modeling of the main body part, the control unit 70 measures the shape of the main body part modeled using the measuring unit 55 (step S20). In the present embodiment, the measurement unit 55 measures the height (position in the Z direction) of the upper surface of the main body portion over the entire upper surface of the main body portion. When the shape of the three-dimensional object is measured, the control unit 70 then specifies the shape of the correction portion based on the measured shape of the main body portion, and generates correction data (step S30).

FIG. 5 is a diagram showing the concept of correction data. The broken line portion shown in FIG. 5 indicates the original shape (design value) of the three-dimensional object, and the solid line portion indicates the correction portion represented by the correction data. The control unit 70 subtracts the correction data from the original shape of the three-dimensional object (broken line in FIG. 4) from the shape of the three-dimensional object measured in step S20 (solid line portion in FIG. 4), and the remaining shape. Is inverted in the Z direction. At this time, the control unit 70 generates correction data representing the shape of the correction portion based on the measurement value of the three-dimensional object at a second resolution that is higher than the first resolution that is the modeling resolution of the main body portion. Generate. Similar to the main body portion, the correction data is generated for each cross section corresponding to the stacking pitch, and has a gradation value for each cross section. The gradation value represents the amount of the curable liquid discharged to the corresponding coordinates. The height of the measured 3D object is the second
When the resolution exceeds the resolution of the XY coordinate, the control unit 70 sets the gradation value of the coordinate at the upper end of the XY coordinate corresponding to the height to a value less than the maximum gradation value according to the height. To do. If a value less than the maximum gradation value is set, the amount of the curable liquid ejected at the coordinates decreases, so that the apparent resolution in the Z direction can be increased.

After generating the correction data, the control unit 70 models the correction portion with the second resolution (step S40). The correction portion is shaped by the same method as the shaping of the main body portion, except that the shaping is performed at the second resolution. However, the cross-sectional data of the correction portion is stored in the computer 20
It is supplied from the control unit 70 itself, not 0. In the present embodiment, the controller 70 increases the type of the amount of the curable liquid discharged per unit volume when modeling the correction portion, as compared with the case of modeling the main body portion, as will be described below. .

FIG. 6 is an explanatory diagram showing the first resolution and the discharge amount of the curable liquid at the first resolution. FIG. 7 is an explanatory diagram showing the second resolution and the discharge amount of the curable liquid at the second resolution. As shown in FIG. 6A, in the present embodiment, the first resolution is 600 dpi in the modeling resolution in the X direction and the Y direction, respectively. Also, as shown in FIG. 7A, the second resolution is 120 times the resolution in the X direction that is twice the first resolution.
The resolution in the Y direction is 600 dpi which is the same as the first resolution. Z
Regarding the direction resolution, both the first resolution and the second resolution are 600 dpi. The control unit 70 can increase the modeling resolution from the first resolution to the second resolution by halving the moving speed of the head unit 50 in the X direction. In addition, the control unit 70
By modeling one area by two passes, it is possible to increase the modeling resolution from the first resolution to the second resolution.

In the present embodiment, as shown in FIG. 6B, in the first resolution, the control unit 70 determines the amount of the curable liquid discharged per unit volume U according to the gradation value of the main body portion. 0, 10, 16, 2
One of four types of 0 ng is selected and discharged to the head unit 50. The unit volume U in the present embodiment is a volume obtained by multiplying the minimum resolution in each of the X, Y, and Z resolutions in the first resolution. On the other hand, as shown in FIG. 7B, in the second resolution, the control unit 70 determines the amount of the curable liquid to be ejected with respect to one coordinate as 0.5 or 5 according to the gradation value of the correction data. ,
It is selected from four types of 8, 10 ng and discharged to the head unit 50. Then, since the second resolution is twice the first resolution, the amount of the curable liquid of the adjacent coordinates is added per unit volume U, and is 0, 10, 13, 15, 16, 18, 20 ng. Seven types of amounts are discharged. That is, the control unit 70 can drive a larger amount of curable liquid than the main body portion per unit volume for the correction portion.

According to the three-dimensional modeling apparatus 100 of the present embodiment described above, even when a dimensional error occurs in the main body portion of the three-dimensional object to be modeled, the error is corrected with a higher resolution than the main body portion. be able to. Therefore, a three-dimensional object can be accurately modeled. Moreover, in this embodiment, when modeling the correction | amendment part of a three-dimensional object, the kind of quantity of the hardening liquid discharged per unit volume is increased rather than the case where a main-body part is modeled. Therefore, it becomes possible to finely adjust the amount of the curable liquid to be applied to the correction portion, and dimensional errors occurring in the main body portion can be corrected smoothly with higher accuracy. Furthermore, in this embodiment, since the three-dimensional modeling apparatus 100 includes the measuring unit 55, the main body portion can be accurately corrected based on the shape of the actually modeled three-dimensional object. In the present embodiment, the body portion is modeled at a lower resolution (first resolution) than that of the correction portion, so that the modeling speed is markedly higher than the entire body is modeled at a higher resolution (second resolution). You can expedite. That is, according to the present embodiment, it is possible to achieve both a high modeling speed and an improvement in modeling accuracy.

B. Second embodiment:
FIG. 8 is an explanatory diagram showing a schematic configuration of the three-dimensional modeling apparatus in the second embodiment. The three-dimensional modeling apparatus 100 according to the first embodiment models a three-dimensional object by discharging a curable liquid to the powder supplied into the modeling unit 10. On the other hand, the three-dimensional modeling apparatus 100a of the second embodiment models a three-dimensional object using only a curable liquid containing a resin without using powder.

The three-dimensional modeling apparatus 100a includes a modeling unit 10, a head unit 50, a measurement unit 55, a curing energy applying unit 60, and a control unit 70. The modeling unit 10 includes a modeling stage 11, a frame body 12, and an actuator 13 as in the first embodiment. However, the frame 12 may be omitted. A tank 51 is connected to the head unit 50. That is, the 3D modeling apparatus 100a is common to the configuration of the 3D modeling apparatus 100 of the first embodiment in many parts, and is flat with the powder supply unit 20 from the 3D modeling apparatus 100 of the first embodiment. Mechanism 30
And the powder recovery unit 40 are omitted. Even in such a three-dimensional modeling apparatus 100a, a three-dimensional object can be modeled by the same process as the three-dimensional modeling apparatus 100 of the first embodiment, except for the step of forming a powder layer.

C. Variations:
<First Modification>
In the above embodiment, every time the three-dimensional modeling process shown in FIG. 3 is executed, the shape of the main body portion of the three-dimensional object is measured, and correction data is generated. On the other hand, the correction data may be generated at an arbitrary timing. For example, when the 3D modeling process is first executed,
Correction data is generated only when the first three-dimensional modeling process is performed when modeling a plurality of three-dimensional objects of the same shape, and in the second and subsequent three-dimensional modeling processes, the correction data is used to correct the correction portion. You may model. Further, the correction data is obtained when the three-dimensional modeling apparatus 100 is manufactured.
It may be generated by measuring a predetermined modeling model and stored in the control unit 70 in a nonvolatile manner. When the correction data is generated in advance, for example, the three-dimensional modeling apparatus 100
May model the main body part after the correction part is first modeled. Moreover, you may model a correction | amendment part in the middle of modeling a main-body part. If the correction part is shaped before the main body part, it is possible to make the correction to the main body part inconspicuous. Note that when the correction data is generated in advance, the three-dimensional modeling apparatus 100 may not include the measurement unit 55.

<Second Modification>
In the above embodiment, the control unit 70 increases the type of the amount of the curable liquid to be discharged per unit volume when modeling the correction portion. However, such control is not essential. That is, the controller 70 may only perform modeling at a higher resolution than modeling the main body portion when modeling the correction portion.

<Third Modification>
In the said embodiment, when modeling a correction | amendment part, the resolution of a X direction is raised rather than the case where a main-body part is modeled. On the other hand, the direction for increasing the resolution is not limited to the X direction. For example, the resolution in the Y direction may be increased, or the resolution in the Z direction may be increased. X, Y,
All the resolutions in the Z direction may be increased, and the resolution in any two of the X, Y, and Z directions may be increased.

<Fourth Modification>
In the above embodiment, the control unit 70 controls the measurement unit 55 and generates correction data. On the other hand, the computer 200 may control the measurement unit 55 and the computer 200 may generate correction data.

<Fifth Modification>
In the embodiment described above, the 3D modeling process illustrated in FIG. 3 may be executed by the computer 200 controlling each unit of the 3D modeling apparatus 100 instead of the control unit 70.
That is, the computer 200 may fulfill the function of the control unit 70 of the 3D modeling apparatus 100.

<Sixth Modification>
In the above embodiment, the head unit 50 includes one nozzle row for modeling the main body portion and the correction portion. In addition, for example, color ink for coloring the surface of a three-dimensional object is used. You may provide the nozzle row | line | column which discharges, the nozzle row | line | column which discharges the support material for supporting the overhang part of a three-dimensional object, etc.

<Seventh Modification>
In the above embodiment, the head unit 50 is moved by moving the modeling stage 11 in the Z direction.
Relatively move in the Z direction. On the other hand, the position of the modeling stage 11 may be fixed and the head unit 50 may be moved directly in the Z direction. Moreover, in the said embodiment, although the head part 50 moves to a X direction and a Y direction, the position of the X direction and the Y direction of the head part 50 is fixed,
The modeling stage 11 may be moved in the X direction and the Y direction.

The present invention is not limited to the above-described embodiments and modifications, and can be realized with various configurations without departing from the spirit thereof. For example, the technical features in the embodiments and modifications corresponding to the technical features in each embodiment described in the summary section of the invention are intended to solve part or all of the above-described problems, or In order to achieve some or all of the effects,
Replacement and combination are possible. Further, if the technical feature is not described as essential in the present specification, it can be deleted as appropriate.

DESCRIPTION OF SYMBOLS 100,100a ... Three-dimensional modeling apparatus 10 ... Modeling part 11 ... Modeling stage 12 ... Frame body 13 ... Actuator 20 ... Powder supply part 30 ... Flattening mechanism 40 ... Powder collection part 50 ... Head part 51 ... Tank 55 ... Measurement Unit 60 ... Curing energy application unit 70 ... Control unit 200 ... Computer

Claims (5)

A three-dimensional modeling apparatus for modeling a three-dimensional object,
A head unit that shapes the object by discharging a liquid that is one material of the object;
The head portion is controlled, the main body portion of the object is shaped with a first resolution, and the correction portion for correcting the shape of the main body portion of the object is more than the first resolution. A control unit for modeling at a second resolution which is a high resolution;
3D modeling device. The three-dimensional modeling apparatus according to claim 1,
The head unit is capable of changing the amount of the liquid ejected per unit volume,
The head portion increases the type of the amount of the liquid discharged per unit volume when modeling the correction portion, rather than when modeling the main body portion,
3D modeling equipment. The three-dimensional modeling apparatus according to claim 1 or 2,
A measuring unit for measuring the shape of the main body part;
The control unit specifies the shape of the correction portion based on the measurement result by the measurement unit,
3D modeling equipment. A manufacturing method in which a three-dimensional modeling apparatus manufactures a three-dimensional object,
The three-dimensional modeling apparatus includes a head unit that models the object by discharging a liquid that is one material of the object,
The head portion is controlled, the main body portion of the object is shaped with a first resolution, and the correction portion for correcting the shape of the main body portion of the object is more than the first resolution. Modeling with the second resolution, which is a high resolution,
Production method. A computer program for a computer to control a 3D modeling apparatus to model a 3D object,
The three-dimensional modeling apparatus includes a head unit that models the object by discharging a liquid that is one material of the object,
The head portion is controlled, the main body portion of the object is shaped with a first resolution, and the correction portion for correcting the shape of the main body portion of the object is more than the first resolution. The function of modeling at the second resolution, which is a high resolution,
A computer program for causing the computer to realize the above.

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