KR101966331B1 - An Apparatus and Method for Generating 3-Dimensional Data and An Apparatus and Method for Forming 3-Dimensional Object - Google Patents

An Apparatus and Method for Generating 3-Dimensional Data and An Apparatus and Method for Forming 3-Dimensional Object Download PDF

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Publication number
KR101966331B1
KR101966331B1 KR1020170025525A KR20170025525A KR101966331B1 KR 101966331 B1 KR101966331 B1 KR 101966331B1 KR 1020170025525 A KR1020170025525 A KR 1020170025525A KR 20170025525 A KR20170025525 A KR 20170025525A KR 101966331 B1 KR101966331 B1 KR 101966331B1
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dimensional object
shape data
physical property
molding
property level
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KR1020170025525A
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Korean (ko)
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KR20180098857A (en
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이병극
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주식회사 캐리마
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Priority to PCT/KR2018/002379 priority patent/WO2018155993A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B29C64/393—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • Mechanical Engineering (AREA)
  • Optics & Photonics (AREA)

Abstract

The present invention relates to a three-dimensional object molding data generating apparatus and a molding data generating method. The present invention also relates to a three-dimensional object molding apparatus and a molding method thereof. A method for generating 3D shape data for forming a 3D object by an exposure curing method, the method comprising: preparing basic shape data of a 3D object; Providing a user interface to display a shape of the 3D object and to select a physical property level for each part of the 3D object; And obtaining correction shape data reflecting the selected physical property level of each part through the user interface in the basic shape data. A 3D molding apparatus for molding a three-dimensional object by an exposure curing method, comprising: a resin tank accommodating a photocurable liquid resin; Molding plate is molded three-dimensional object; Molding plate driving unit for lifting the molding plate; An image light irradiation unit for irradiating image light corresponding to the unit image toward the forming surface formed on the molding plate; And a controller for extracting the physical property level for each part from the corrected shape data having different physical property levels for each part of the 3D object, and for changing the exposure conditions of the image light of the image light irradiator based on the extracted physical property level. . Such a three-dimensional molding apparatus of the present invention is capable of molding the three-dimensional object with resin of different hardness for each part.

Description

3D object forming data generating apparatus, forming data generating method, 3D object forming apparatus and forming method {An Apparatus and Method for Generating 3-Dimensional Data and An Apparatus and Method for Forming 3-Dimensional Object}

The present invention relates to a three-dimensional object molding data generating apparatus and a molding data generating method. The present invention also relates to a three-dimensional object molding apparatus and a molding method thereof. In particular, the present invention relates to a three-dimensional object molding data generating apparatus including a physical property level of a three-dimensional object and a method thereof, and a molding apparatus and method for molding a three-dimensional object including the physical property level of the three-dimensional object.

Conventional three-dimensional object molding apparatus, or 3D printer to form a desired 3D object by sequentially laminating the unit molding layer on the molding plate. Each unit molding layer is formed by curing the liquid resin exposed to the image light provided by the light irradiation apparatus.

However, in such a conventional 3D molding apparatus, it is only possible to form a three-dimensional object of a single physical property level by the material of the liquid resin. As the spread of 3D printers or 3D molding apparatuses has become more common, there has been a need for molding of resins having different physical properties for each part of a 3D object. Among the physical properties of the resin, there are hardness, strength, toughness, and the like. The prior art cannot meet this need.

An object of the present invention is to provide a three-dimensional object molding apparatus and a molding method for forming a three-dimensional object with a resin of different physical properties for each part.

According to an aspect of the present invention, there is provided a method of generating 3D shape data for forming a 3D object by an exposure curing method, comprising: preparing basic shape data of the 3D object; Providing a user interface to display a shape of the 3D object and to select a physical property level for each part of the 3D object; And obtaining correction shape data reflecting the property level for each part selected through the user interface to the basic shape data.

The correction shape data may be a set of unit images to be sequentially irradiated.

The physical property level is a hardness level, characterized in that determined by at least one of light intensity, light wavelength, exposure time, exposure pattern.

      According to another aspect of the present invention, the object is a 3D shape data generating apparatus for forming a three-dimensional object by the exposure curing method, comprising: a data input unit; A display unit; And displaying a user interface on the display unit to select the shape of the 3D object and the physical property level of each part of the 3D object based on the basic shape data of the 3D object received through the data input unit. It is also achieved by the 3D shape data generating device, characterized in that it comprises a control unit for generating the correction shape data reflecting the physical property level for each part selected through the user interface to the basic shape data.

      According to another field of the present invention, a 3D molding method for molding a three-dimensional object by the exposure curing method, the method comprising the steps of: preparing correction shape data having different physical property levels for each part of the three-dimensional object; Extracting the physical property level for each part from the correction shape data; And changing the exposure condition of the image light based on the extracted physical property level and irradiating for each unit image of the shape data.

According to another field of the present invention, there is provided a 3D molding apparatus for molding a three-dimensional object by an exposure curing method, comprising: a resin tank accommodating a photocurable liquid resin; A molding plate on which the three-dimensional object is molded; Molding plate driving unit for lifting the molding plate; An image light irradiator which irradiates image light corresponding to a unit image toward a forming surface formed on the molding plate; And a controller configured to extract the physical property level for each part from the corrected shape data having different physical property levels for each part of the 3D object, and to change the exposure condition of the image light of the image light irradiator based on the extracted physical property level. It is characterized by.

According to the apparatus and method for forming a 3D object of the present invention, it is possible to add property data to the 3D data by setting molding to different property levels for each part of the 3D object, and convert the 3D object from the 3D data to which the property data is added. The physical properties can be molded differently for each part.

1 is a conceptual diagram of a three-dimensional object forming apparatus according to the present invention.
2 is a flowchart of a hardness setting program for setting hardness data, which is one of physical property data, for each part of a three-dimensional object according to the present invention.
3 is a flowchart of the 3D molding apparatus for molding by changing the light wavelength in accordance with the hardness value according to the present invention.
4 is a user interface screen illustrating setting hardness data for each part of a 3D object through a hardness setting menu of the hardness setting program according to the present invention. 5 is a cross-sectional perspective view of a three-dimensional object after molding according to the present invention, showing a part "F" of the object.

Hereinafter, with reference to the accompanying drawings will be described in detail an embodiment of the present invention. The features and advantages of the present invention will become more apparent from the following description of the preferred embodiments based on the accompanying drawings. The present invention will be described by setting the hardness of the three-dimensional object of the physical properties differently. Such salsi examples are not limited to hardness.

1 is a conceptual diagram of a three-dimensional object forming apparatus according to the present invention. The liquid photocurable polymer resin 10 is stored in the resin tank 30. The photocurable polymer resin 10 is used by mixing an epoxy resin and an acrylic resin. Epoxy resins have higher hardness than acrylic resins. Epoxy resins harden and react with visible and ultraviolet light. Acrylic resins react with the ultraviolet rays. The polymerization initiator (E) suitable for the curing reaction of the epoxy resin and the polymerization initiator (A) suitable for the curing reaction of the acrylic resin are mixed and used together.

The three-dimensional object 1 is attached to the molding plate 20. The three-dimensional object 1 is formed such that the thin plate-shaped unit molding layers are sequentially stacked along the Z-axis direction to have a three-dimensional shape. In the case of Fig. 1, the molding plate is lowered, but the system in which the molding plate is raised can also be configured. The uppermost surface of the resin bath 30 corresponds to the molding surface 2 to which image light is irradiated. The image light 41 generated by the image light irradiating part 40 is exposed to an uncured liquid resin applied to the forming surface 2 on the top surface of the molding plate 20. The image light 41 irradiated by the image light irradiator 40 cures the resin in the liquid state applied to the molding surface 2, and the liquid photocurable polymer is cured in the solid state to form an upper portion of the object 1. Are stacked on. When the modeling plate 20 descends a certain height by the lowering operation of the modeling plate driver 60, the liquid resin fills the molding surface 2 again, and the next layer is formed by the image light irradiated from the image light irradiation part 40. Molded. By repeating these steps, the three-dimensional object having the final target shape is formed.

The hardness setting program execution unit 80 for setting the hardness for each part of the three-dimensional object according to the present invention can be installed inside or outside the 3D molding apparatus. When installed inside the 3D molding apparatus, the control unit 50 of the 3D molding apparatus executes by accessing the memory 70 incorporating the hardness setting program. When installed outside the 3D molding apparatus, the hardness setting program is executed by a controller (not shown) included in the hardness setting program execution unit 80 itself, and the hardness is set for each part. At this time, the control unit of the 3D molding apparatus receives 3D data having a hardness set and molds it to different hardness for each part of the 3D object.

The controller 50 of the 3D molding apparatus controls the image light irradiation unit 40 and the model plate driving unit 60 according to the shape and hardness data of the 3D object to form the 3D object.

As described above, the three-dimensional molding apparatus according to the present invention sequentially stacks the unit forming layers by intermittently lowering or raising the molding plate, and sequentially sequencing image light corresponding to the unit image while continuously lowering or raising the molding plate. It can also be adopted in the continuous molding method of changing and irradiating. Although the present invention has been described in the resin tank method, the present invention is not limited to the 3D printing apparatus of the resin bath method.

2 is a flowchart of a hardness setting program for setting hardness data for each part of a three-dimensional object according to the present invention. The hardness setting program is executed by the hardness setting program execution unit 80 of FIG. First, 3D data is received (S10). The 3D data includes shape data of a three-dimensional object. When the hardness setting program is executed, a menu for entering hardness information is displayed (S20). In addition, the menu to display the shape of the three-dimensional object and to input the hardness for each part (S30). The hardness is input for each part by the shape of the three-dimensional object (S40). The corrected 3D data is generated by adding the hardness value to the initial 3D data (S50). Such hardness data may be generated to correspond to each pixel value of the 3D data.

Although setting the hardness has been described as an embodiment, not only the hardness but also the physical property level of the 3D object may be set differently. There are various physical properties of three-dimensional objects, such as hardness, strength, and toughness.

4 is a user interface screen illustrating setting hardness data for each part of a 3D object through a hardness setting menu of the hardness setting program according to the present invention. When the hardness setting program is executed by the hardness setting program execution unit 80 of FIG. 1, a user interface corresponding to the hardness setting menu shown in FIG. 4 appears. 4 is a three-dimensional object display interface 410 showing the shape of the three-dimensional object. In this user interface, the shape of various types of three-dimensional objects can be designated to a perspective view, a cross-sectional view, or an interior of the three-dimensional object. 4 shows a cube-shaped structure having four legs. Each of the four legs is designated with A, B, C, and D in order. The hexahedral shape is named as part E at the top and part F at the bottom center. Such sites can be numbered and numbered according to three-dimensional objects.

4 shows the hardness setting menu 420 for designating the hardness for each part of the 3D object. In the uppermost box 421 of the hardness setting menu 420, the text “hardness setting” is displayed. In the object column 430, the text "object shape" is displayed. Each area of the vertical axis of this area displays the object shape of the detail of the three-dimensional object. 431 to 434 represent four leg areas. 435 represents the top of the cube. 436 shows the lower shape of the cube. The region for each object name 430 and the corresponding part name is the part name column 440. In this column, the letters A, B, C, D, E, and F are recorded (symbols 441 to 446). The last column is a hardness column 450 for inputting the longitude that can be specified by the user. The user may input the hardness at each part corresponding to A to F of the 3D object. In the embodiment, the hardness “1.5” is input to the areas A to D corresponding to the four leg regions. In the "E" area corresponding to the upper part of the cube, enter the hardness "1.0". Enter the hardness "0.6" in the "F" area at the bottom of the cube.

When the hardness is input by the hardness setting program, the corrected 3D data is generated by adding the hardness value input for each part of the object to the initial 3D data having only the shape data of the 3D object. The corrected 3D data has both shape data and hardness data of the three-dimensional object.

Hardness 1.0 indicates the hardness of acrylic resin in the mixed liquid resin of epoxy resin and acrylic resin. Hardness 1.5 is the hardness of epoxy / acrylic mixed resin cured by mixing a certain ratio of epoxy resin and acrylic resin having a stronger hardness than acrylic resin. If the epoxy is cured at a mixing ratio of 50% acrylic 50%, the epoxy / acrylic mixed resin has a hardness of 1.5. Hardness 0.6 is a case where the hardness is more weakly molded than when cured with an acrylic resin. This case is achieved by forming a bubble which unexposures an inner region spaced a certain distance from the surface of the molded object. Hardness 0.6 can be achieved by forming about 40% of the bubble area inside.

There are various physical properties of three-dimensional objects, such as hardness, strength, and toughness. In addition to hardness, other physical property levels of the 3D object may be selected and input for each part.

3 is a flowchart of the 3D molding apparatus for molding by changing the light wavelength in accordance with the hardness value according to the present invention. 3D data of the hardness setting of Figs. 2 and 4 is input to the 3D molding apparatus to start molding. 3D printing is started (S100). The controller of the 3D printer extracts the hardness data from the 3D data having the shape data of the three-dimensional object and the hardness data of each part.

In the case of molding on a part of a three-dimensional object having an extracted hardness value of 1.0 or more (when hardness is 1.5 as in the embodiment), it is controlled to irradiate ultraviolet light, which is a light wavelength capable of curing reaction of both epoxy resin and acrylic resin. (S120). The image light irradiation part 40 of FIG. 1 irradiates the shaping | molding surface 2 with an ultraviolet-ray. The photocurable polymer resin 10 stored in the resin tank 30 is used by mixing an epoxy resin and an acrylic resin, and the epoxy resin hardens and reacts with visible light and ultraviolet rays. Acrylic resins react with the ultraviolet rays. The polymerization initiator (E) suitable for the curing reaction of the epoxy resin and the polymerization initiator (A) suitable for the curing reaction of the acrylic resin are mixed and used together. Ultraviolet light photocuring reaction of both epoxy resin and acrylic resin. Therefore, the epoxy resin and the acrylic resin can be adjusted to cure at 50:50.

In the case of molding on the site of the three-dimensional object having the extracted hardness value of 1.0, it is controlled so as to irradiate visible light which is a light wavelength that the acrylic resin having low hardness hardens (S130). Similarly, the image light irradiation part 40 irradiates the molding surface 2 with visible light. The photocurable polymer resin 10 stored in the resin tank 30 is used by mixing an epoxy resin and an acrylic resin, and the epoxy resin hardens and reacts with visible light and ultraviolet rays. Acrylic resins react with the ultraviolet rays. The resin which hardens and reacts only with visible light is an acrylic resin. Therefore, the specific part of the three-dimensional object having a hardness value of 1.0 is cured with an acrylic resin to achieve a hardness of 1.0.

When the extracted hardness value is molded to the site of the three-dimensional object with a hardness of less than 1.0, it is controlled so as to irradiate visible light, which is an optical wavelength, to which the acrylic resin having a low hardness is cured (S140). Thereafter, a non-exposure portion is set such that bubbles of a predetermined size are continuously formed in the inner region spaced a predetermined distance from the surface of the 3D object (S150). This is to change the layer shape of the unit molding layer based on the hardness.

As described above, an embodiment in which the hardness can be formed differently by changing the light wavelength has been described. However, the same effects as those of varying the light wavelength can be achieved by varying the light intensity, varying the exposure time, or varying the exposure pattern. Therefore, the present invention is not limited to the embodiment of FIG.

Figure 5 is a cross-sectional perspective view of the finished molded article of the three-dimensional object according to the present invention, showing the part "F" of the object. Shows the shape of the final molded article according to the present invention as described above. Since the areas A, B, C, and D were set at a hardness of 1.5, molding was performed with a resin mixed with an epoxy resin and an acrylic resin at a ratio of about 50:50. The region E was formed into an acrylic resin to achieve a hardness of 1.0. The region F corresponding to the lower region of the hexahedron is a region set to a hardness of 0.6, and an acrylic resin was formed using the methods of S140 and S150 of FIG. Hardness 0.6 was achieved by forming a non-exposed part so as to form a bubble of a certain size in the inner region spaced a certain distance from the surface by setting a bubble of about 40%. The definition does not mean that the actual hardness is 0.6, but that it is molded using about 60% of the resin, and the molding does not show the appearance at all and ensures the same quality in terms of strength and structure. The demand for resin can be reduced.

When the diameter of the bubble is "d", and the space between the bubble and the bubble "L", "d" is appropriately 0.3 to 10mm, and "L" can be appropriately selected from 0.5mm to 25mm.

1: object
2: forming surface
10: resin
20: molding plate
30: resin tank
40: image light irradiation unit
41: image illumination
50: control unit
60: molding plate drive unit
70: memory
80: hardness setting program execution unit
410: three-dimensional object display interface
420: hardness setting menu

Claims (12)

In the 3D shape data generation method for forming a three-dimensional object by exposure curing method,
Preparing basic shape data of the three-dimensional object;
Providing a user interface to display a shape of the 3D object and to select a physical property level for each part of the 3D object; And
Obtaining corrected shape data reflecting the property level of each part selected through the user interface in the basic shape data;
The user interface includes a property assignment setting menu for specifying a property level for each part of the three-dimensional object,
The correction shape data generation method of 3D shape data, characterized in that for changing the layer shape of the unit forming layer of at least a part of the three-dimensional object in consideration of the physical property level of each part of the three-dimensional object. The method of claim 1,
And the correction shape data is a set of unit images to be sequentially irradiated. The method according to claim 1 or 2,
The physical property level is a hardness level, characterized in that determined by at least one of the light intensity, light wavelength, exposure time, exposure pattern. In the 3D shape data generating apparatus for forming a three-dimensional object by the exposure curing method,
A data input unit;
A display unit; And
A user interface is displayed on the display unit to select a shape of the 3D object and a physical property level for each part of the 3D object based on the basic shape data of the 3D object received through the data input unit, and the user The interface includes a property designation setting menu for designating a property level for each part of the 3D object, and includes a controller for generating correction shape data reflecting the property level for each part specified through the user interface in the basic shape data.
The correction shape data is a 3D shape data generating device, characterized in that for changing the layer shape of the unit forming layer of at least a part of the three-dimensional object in consideration of the physical property level of each part of the three-dimensional object. The method of claim 4, wherein
And the correction shape data is a set of unit images to be sequentially irradiated. The method according to claim 4 or 5,
The physical property level is a hardness level, characterized in that determined by at least one of the light intensity, light wavelength, exposure time, exposure pattern. In the 3D molding method of molding a three-dimensional object by exposure curing method,
Designating a physical property level for each part through a user interface including a property specification setting menu for designating a physical property level for each part of the three-dimensional object based on the basic shape data of the three-dimensional object;
Preparing correction shape data having different physical property levels for each part of the three-dimensional object;
Extracting the physical property level for each part from the correction shape data; And
And changing the exposure condition of the image light based on the extracted physical property level and irradiating for each unit image of the shape data.
And exposing the layered shape of the unit forming layer of at least a part of the three-dimensional object to be exposed based on the extracted physical property level.
delete The method of claim 7, wherein
The physical property level is a hardness level, characterized in that determined by at least one of light intensity, light wavelength, exposure time, exposure pattern. In the 3D molding apparatus for molding a three-dimensional object by the exposure curing method,
A resin bath accommodating the photocurable liquid resin;
A molding plate on which the three-dimensional object is molded;
Molding plate driving unit for lifting the molding plate;
An image light irradiator which irradiates image light corresponding to a unit image toward a forming surface formed on the molding plate; And
And a controller for extracting the physical property level for each part from the corrected shape data having different physical property levels for each part of the 3D object, and for changing the exposure condition of the image light of the image light irradiator based on the extracted physical property level.
The control unit exposes the layered shape of the unit forming layer of at least a part of the three-dimensional object based on the extracted physical property level, and exposes the layered shape.
The correction shape data includes the steps of preparing basic shape data of the three-dimensional object, providing a user interface to display the shape of the three-dimensional object and to select a physical property level for each part of the three-dimensional object, and the It is generated through the step of obtaining the correction shape data reflecting the physical property level for each part selected through the user interface to the basic shape data,
The user interface is a 3D molding apparatus, characterized in that it comprises a property setting menu for specifying the property level for each part of the three-dimensional object.
delete The method of claim 10,
The physical property level is a hardness level, 3D molding apparatus, characterized in that determined by at least one of light intensity, light wavelength, exposure time, exposure pattern.
KR1020170025525A 2017-02-27 2017-02-27 An Apparatus and Method for Generating 3-Dimensional Data and An Apparatus and Method for Forming 3-Dimensional Object KR101966331B1 (en)

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PCT/KR2018/002379 WO2018155993A1 (en) 2017-02-27 2018-02-27 Apparatus for generating three-dimensional object forming data, method for generating forming data, and apparatus and method for forming three-dimensional object

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