KR101667522B1 - 3d printing method using liquid crystal matrix as mask, and 3d printing device - Google Patents

Abstract

A 3D printing apparatus using a liquid crystal matrix as a mask includes a liquid crystal matrix mask including a plurality of pixels and including at least one wavelength filter for transmitting light of a predetermined wavelength band for each pixel, A control unit for controlling the sample rack, the attenuation unit, and the sample rack; and a memory for storing information on the 3D drawing and the respective stacking cross sections, wherein the control unit controls the readout unit The pattern of the liquid crystal matrix mask is determined based on the information on the lamination section, the transmittance of each of the attenuation sections is controlled based on the pattern of the liquid crystal matrix mask, the light is irradiated on the upper part of the liquid crystal matrix mask, And may be configured to cure in a cross-sectional shape.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a 3D printing apparatus and a method using a liquid crystal matrix as a mask,

The present invention relates to a 3D printing apparatus and method using a liquid crystal matrix as a mask.

3D printing refers to a technique of producing three-dimensional objects by injecting various raw materials based on data designed in three dimensions.

A method of making a three-dimensional object is a method of manufacturing a three-dimensional (AM) manufacturing method in which a solid material is piled up one by one, and a method of cutting a three-dimensional object by machining or the like Manufacturing.

The lamination method is classified according to the operation method and material. 　 The FDM (Fused Deposition Modeling) method is a method in which plastics materials are melted and sprayed from a nozzle to form a layer, which is much cheaper than other 3D printers and consumes less material. The SLS (Selective Laser Sintering) method has advantages of high accuracy and various raw materials such as thinning of powder material in the field and sintering only selected parts with laser. Also, 3DP (3 Dimension Printing) method is similar to SLS method in that powder material is thinned but it is hardened by injecting adhesive instead of laser. In addition, there are LOM (Laminated Object Manufacturing) method using a metal material and DLP (Digital Light Processing) method using a photo-curing resin.

Cutting machining is usually called 4-axis or 5-axis machining, and it is widely used in industrial fields because it is already commercialized.

In this regard, Japanese Patent Laid-Open Publication No. 2011-0102759 discloses a three-dimensional printer for producing a high-resolution tooth model using multi-projection.

It is desired to provide a plurality of wavelength filters which transmit different wavelength bands for a plurality of pixels included in the liquid crystal matrix mask. Further, it is intended to adjust the transmittance of light through an attenuator provided for each of a plurality of wavelength filters. In addition, a pattern of the liquid crystal matrix mask is to be determined based on the information about each stacked cross section in the 3D drawing.

In addition, the light transmittance is controlled based on the pattern of the liquid crystal matrix mask, and light is irradiated on the upper portion of the liquid crystal matrix mask to cure the laminated cured material in the shape of the laminated section in the 3D drawing. It is to be understood, however, that the technical scope of the present invention is not limited to the above-described technical problems, and other technical problems may exist.

As a technical means for achieving the above technical object, a 3D printing apparatus using a liquid crystal matrix (Liquid Crystal Matrix) according to the first aspect of the present invention includes a plurality of pixels, each pixel having a predetermined wavelength band A liquid crystal matrix mask including at least one wavelength filter for transmitting light, an attenuator provided for each wavelength filter for adjusting the transmittance of light, a sample shelf for stacking the curable material, a control unit for controlling the attenuator and the sample shelf, A memory for storing information about the 3D drawing and each stacked cross section. Wherein the control unit determines the pattern of the liquid crystal matrix mask based on the information on the lamination cross section read out from the memory and controls the transmissivity of each of the attenuation units based on the pattern of the liquid crystal matrix mask, And irradiating the upper portion with light to cure the laminated cured raw material into the shape of the laminate section.

 According to a second aspect of the present invention, there is provided a 3D printing method using a liquid crystal matrix as a mask, comprising the steps of: determining a pattern of a liquid crystal matrix mask based on information on a lamination cross section protruding from a memory; Adjusting the transmittance of light passing through each wavelength filter of each pixel of the liquid crystal matrix mask, and irradiating light onto the liquid crystal matrix mask to cure the curing raw material into the shape of the lamination cross section .

The above-described task solution is merely exemplary and should not be construed as limiting the present invention. In addition to the exemplary embodiments described above, there may be additional embodiments described in the drawings and the detailed description of the invention.

According to any one of the above-mentioned objects of the present invention, the 3D printing apparatus includes a plurality of wavelength filters for transmitting different wavelength bands for a plurality of pixels included in the liquid crystal matrix mask, and a plurality of attenuation units for respective wavelength filters . In addition, the 3D printing apparatus can irradiate light of a plurality of wavelength bands by adjusting the intensity of light passing through a plurality of wavelength filters through the attenuator, thereby providing various cured colors of the curing raw material. Further, the 3D printing apparatus can determine the pattern of the liquid crystal matrix mask and control the transmittance of light based on the pattern of the liquid crystal matrix mask, based on the information about each stacked cross section in the 3D drawing. In addition, the 3D printing apparatus can irradiate light on the top of the liquid crystal matrix mask to cure the laminated cured raw materials in the shape of the laminate section in the 3D drawing. Here, since the curing raw material and the liquid crystal matrix mask are in the proximity distance range (for example, 10 mm or less), it is possible to irradiate the curing raw material to a near field and the resolution to the shape of the lamination cross section can be increased.

1 is an exemplary illustration of a 3D printing device, in accordance with an embodiment of the present invention.
2 is a block diagram illustrating a controller and a memory of a 3D printing apparatus according to an exemplary embodiment of the present invention.
3 is a view for explaining a detailed configuration of a liquid crystal matrix mask according to an embodiment of the present invention.
4 is a view for explaining an operation method of a 3D printing apparatus according to an embodiment of the present invention.
5 is a view for explaining an operation method of a 3D printing apparatus according to another embodiment of the present invention.
6 is a flowchart illustrating an example of a 3D printing method using a liquid crystal matrix as a mask according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise.

In this specification, the term " part " includes a unit realized by hardware, a unit realized by software, and a unit realized by using both. Further, one unit may be implemented using two or more hardware, or two or more units may be implemented by one hardware.

In this specification, some of the operations or functions described as being performed by the terminal or the device may be performed in the server connected to the terminal or the device instead. Similarly, some of the operations or functions described as being performed by the server may also be performed on a terminal or device connected to the server.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings.

1 is an exemplary illustration of a 3D printing device 100, in accordance with an embodiment of the present invention.

1, a 3D printing apparatus 100 includes a light source 110, a liquid crystal matrix mask 120, a sample lathe 130, a curing material application apparatus 140, a control unit 150, and a memory 160 can do. However, since the 3D printing apparatus 100 of FIG. 1 is only an embodiment of the present invention, the present invention is not limited to FIG. 1, and the 3D printing apparatus 100 may be constructed differently from FIG. 1 according to various embodiments of the present invention. It is possible.

The light source 110 may be UV (ultraviolet ray) light capable of causing a solidification reaction of the curing raw material. The light source 110 may be a light having a broadband wavelength, for example, a light including a wavelength band of 100 nm to 500 nm.

The liquid crystal matrix mask 120 can transmit the light irradiated from the light source 110 to the upper portion of the curing raw material by the control unit 150. The liquid crystal matrix mask 120 may include a plurality of pixels and may include at least one wavelength filter for transmitting light of a predetermined wavelength band for each pixel. For example, the liquid crystal matrix mask 120 may include, for each pixel, three wavelength filters that transmit the first wavelength band, the second wavelength band, and the third wavelength band. Alternatively, the liquid crystal matrix mask 120 may include, for each pixel, two wavelength filters that transmit the first wavelength band and the second wavelength band. The number of filters included per pixel may be one or four or more, but the present invention is not limited to the number of illustrated filters.

Each of the wavelength filters included in the liquid crystal matrix mask 120 is provided with an attenuation unit (not shown), and the transmittance of the light emitted from the light source 110 through the attenuation unit (not shown) can be adjusted. For example, the 3D printing apparatus 100 may control the transmittance of light through the liquid crystal matrix mask 120 by applying an electric signal to the liquid crystal matrix mask 120 through the control of the controller 150 and controlling the transmittance of light through the attenuator (not shown) ), And the opening / closing rate can be controlled, and the light can be transmitted through the open pixel.

A pattern (for example, "A") of the liquid crystal matrix mask 120 is determined based on the cross section of each stack of the 3D drawing read from the memory 160, The transmittance can be controlled. For example, a plurality of pixels corresponding to the pattern of the liquid crystal matrix mask 120 may be opened and set to allow light to pass therethrough. Any of various known techniques may be adopted as a method of determining the pattern of the liquid crystal matrix mask 120 based on each stacked cross section of the 3D drawing.

The sample shelf 130 is a shelf in which curing raw materials are stacked, and can be sequentially lowered or elevated by a predetermined stacking thickness through the control of the controller 150.

The curing material applying apparatus 140 can apply the curing material to the sample rack 130 by a predetermined lamination thickness. Here, the curing raw material can be cured to a solid state by the light that has passed through the liquid crystal matrix mask 120. The cured raw material laminated on the sample shelf 130 is formed into a shape of laminated cross section corresponding to the pattern of the liquid crystal matrix mask 120 (for example, "ah") by light passing through the liquid crystal matrix mask 120 Can be hardened.

For example, when a liquid polymer material that is cured by light in a wavelength band of 365 nm is irradiated with light in a wavelength band of 365 nm, the liquid polymer material can be cured only at the irradiated portion.

The curing raw material may include a first curing raw material which is cured by light of a first wavelength band, a second curing raw material which is cured by light of a second wavelength band, and a third curing raw material which is cured by light of a third wavelength band . At this time, the cured color of the curing raw material in which the first curing raw material, the second curing raw material and the third curing raw material are mixed can be determined according to the curing rate of each of the first curing fuel, the second curing fuel and the third curing fuel .

For example, if the acrylate red curing raw material is cured by UV light, the cured color of the curing raw material may appear red. Further, if the acrylate green curing raw material is cured by UV light, the cured color of the curing raw material can be represented as green. Further, when the acrylate blue curing raw material is cured by UV light, the cured color of the curing raw material can be indicated in blue. Also. When the acrylate curing raw material is cured by UV light, the cured color of the curing raw material can be expressed in black.

Hereinafter, the control unit 150 and the memory 160 of the 3D printing apparatus 100 of FIG. 1 will be described in detail.

2 is a block diagram illustrating a controller 150 and a memory 160 of the 3D printing apparatus 100 according to an embodiment of the present invention.

The control unit 150 may control the light from the light source 110 to be irradiated to the liquid crystal matrix mask 120. Here, the light source may be a light of a broadband wavelength including the first to third wavelength bands.

The control unit 150 can determine the pattern of the liquid crystal matrix mask 120 based on the information about the lamination cross section read from the memory 160. [ Here, the pattern of the liquid crystal matrix mask 120 can be changed in accordance with the shape of the lamination section. Meanwhile, in an embodiment of the present invention, the liquid crystal matrix mask 120 may include three wavelength filters for transmitting a first wavelength band, a second wavelength band and a third wavelength band for each of a plurality of pixels . In another embodiment of the present invention, the liquid crystal matrix mask 120 may comprise two wavelength filters for each pixel to transmit the first wavelength band and the second wavelength band.

The control unit 150 can control the driving of the attenuator (not shown) and the sample shelf 130.

The control unit 150 may control each of the attenuation units (not shown) based on the pattern of the liquid crystal matrix mask 120. [ For example, the control unit 150 can adjust the transmittance of light passing through each wavelength filter of each pixel of the liquid crystal matrix mask 120 through an attenuator (not shown) based on the pattern of the liquid crystal matrix mask 120 .

The controller 150 controls the transmittance of light passing through the three wavelength filters for transmitting the first wavelength band, the second wavelength band and the third wavelength band for each pixel of the liquid crystal matrix mask 120 (not shown) Can be controlled.

The control unit 150 can control the transmittance of the attenuator (not shown) provided in each of the three wavelength filters based on the information on the lamination cross-section to determine the curing ratio of the curing raw material. Here, the curing raw material includes a first curing raw material which is cured by the light of the first wavelength band, a second curing raw material which is cured by the light of the second wavelength band, and a third curing raw material which is cured by the light of the third wavelength band . Wherein the first curing raw material exhibits a first color when cured by light of a first wavelength band and the second curing raw material exhibits a second color when cured by light of a second wavelength band, And may exhibit a third color when cured by light of three wavelength bands. If the curing raw material is cured by light, the cured color of the curing raw material can be determined according to the curing ratio of each of the first curing raw material, the second curing raw material and the third curing raw material.

In another embodiment of the present invention, the controller 150 can control the transmittance of the attenuator (not shown) provided in each of the two wavelength filters based on the information about the lamination cross-section to determine the curing ratio of the curing raw material. Here, the curing raw material may include a first curing raw material which is cured by the light of the first wavelength band and a second curing raw material which is cured by the light of the second wavelength band. The first curing raw material may exhibit a first color when cured by light of a first wavelength band and the second curing raw material may exhibit a second color when cured by light of a second wavelength band. If the curing raw material is cured by light, the cured color of the curing raw material can be determined according to the curing ratio of each of the first curing raw material and the second curing raw material.

For example, when the control unit 150 controls the transmissivity of each attenuator (not shown) of each wavelength filter of the liquid crystal matrix mask 120 and is cured by the light of the first wavelength band, the first cure A second curing raw material showing green when cured by the light of the second wavelength band and a third curing raw material showing blue when cured by the light of the third wavelength band are uniformly mixed, The first curing raw material, the second curing raw material, and the third curing raw material are mixed when 0% of the light of the wavelength band, 66% of the light of the second wavelength band, and 88% of the light of the third wavelength band are irradiated The cured color of the curing raw material may be cyan.

In addition, the controller 150 controls the transmittance of each attenuator (not shown) of each wavelength filter of the liquid crystal matrix mask 120 so that light of the first wavelength band is 100%, light of the second wavelength band The cured raw material in which the first curing raw material, the second curing raw material and the third curing raw material are mixed may be yellow when the curing raw material is irradiated with 100% of light in the third wavelength band and 0% .

The control unit 150 can control the curing material application apparatus 140 to apply the curing raw material to the sample rack 130 by a predetermined lamination thickness.

The control unit 150 can control the curing material application apparatus 140 to sequentially apply different types of curing materials. For example, the control unit 150 can control the curing material application apparatus 140 to sequentially apply the first curing raw material, the second curing raw material, and the third curing raw material on the basis of the pattern of the liquid crystal matrix mask 120 have. At this time, the first curing raw material shows a first color when cured by light in the first wavelength band, the second curing raw material shows a second color when cured by light in the second wavelength band, The raw material may exhibit a third color when cured by light in the third wavelength band.

The control unit 150 may irradiate light to the upper portion of the liquid crystal matrix mask 120 to cure the cured raw material stacked on the sample rack 130 into the shape of a laminate section. Further, the controller 150 can control the movement of the sample shelf 130 so that the curing raw material is stacked on the cured laminate section.

For example, the control unit 150 irradiates light to the curing material, for example, the first curing material to the second curing material as the curing materials stacked on the sample shelf 130, It can be cured in the form of a laminated section. Thereafter, the controller 150 may lower the sample rack 130 by a predetermined lamination thickness so that the curing raw material is stacked on the cured first lamination section. Then, the control unit 150 may irradiate light to the cured raw material stacked on the cured raw material to cure the cured raw material into the shape of the second laminated cross-section.

In another embodiment of the present invention, the control unit 150 controls the curing material dispensing apparatus 140 (or the curing material dispensing apparatus) to sequentially apply the curing raw material to the sample rack 130 on which the curing raw materials are stacked, Can be controlled.

For example, after the first curing material is applied to the sample shelf 130, the control unit 150 irradiates the light of the first wavelength band before the second curing material is applied, And can be cured in the first shape. After the first curing material is washed and the second curing material is applied to the sample shelf 130, the control unit 150 irradiates the light of the second wavelength band to irradiate the second curing material to the second shape . Then, the control unit 150 cleans the second curing raw material, applies the third curing raw material to the sample rack 130, and then irradiates the light of the third wavelength band to irradiate the third curing raw material to the third And can be cured in a shape. Thereafter, the control unit 150 may control the sample rack 130 to descend.

The memory 160 may store information about each stacked section of the 3D drawing and the 3D drawing.

The memory 160 stores data input and output between the respective components in the 3D printing apparatus 100 and is input and output between components outside the 3D printing apparatus 100 and the 3D printing apparatus 100 Data can be stored. One example of such a memory 160 includes a hard disk drive, a ROM (Read Only Memory), a RAM (Random Access Memory), a flash memory, a memory card, and the like existing in the 3D printing apparatus 100 or the like.

Meanwhile, those skilled in the art will appreciate that the controller 150 and the memory 160 may be implemented separately, or one or more of them may be integrated.

3 is a view for explaining a detailed configuration of a liquid crystal matrix mask according to an embodiment of the present invention.

In the liquid crystal matrix mask 120, a plurality of wavelength filters 30 may be inserted based on the wavelength at which the curing raw material is cured. For example, three wavelength filters 30 of 150 nm, 500 nm, and 800 nm, respectively, per pixel may be inserted into the liquid crystal matrix mask 120. The wavelength band exemplified herein is only an example, and the present invention is not limited to a specific wavelength band. The wavelength of the liquid crystal matrix mask 120 may be varied depending on the characteristics of the curing raw material. The liquid crystal matrix mask 120 is provided with an attenuator 30 capable of adjusting the transmittance of light for each of a plurality of wavelength filters included in one pixel. When the light of the wavelength is irradiated, the transmittance of the light of the wavelength is adjusted .

Accordingly, the 3D printing apparatus 100 can control the transmittance of light for each of a plurality of wavelength filters included in one pixel under the control of the controller 150, and adjust the ratio of the curing raw material to be cured according to each wavelength.

The curing material used in the 3D printing apparatus 100 according to an embodiment of the present invention may include a plurality of curing raw materials in powder or liquid state. For example, the curing raw material may include a first curing raw material which is cured by light of a wavelength band of 150 nm, a second curing raw material which is cured by light of a wavelength band of 500 nm, and a third curing raw material which is cured by light of a wavelength band of 800 nm Or the like.

For example, when the first curing raw material is cured, it is red, when the second curing raw material is cured, it is yellow, and when the third curing raw material is cured, it is blue. In the 3D printing device 100) irradiates the curing raw material with light of 150 nm wavelength band at a rate of 20%, light of 500 nm wavelength band at a rate of 40%, and light of a wavelength band of 800 nm at a rate of 100% In the curing raw material in which the first curing raw material, the second curing raw material and the third curing raw material are mixed, the first curing raw material is cured by 20%, the second curing raw material is cured by 40%, the third curing raw material is cured by 100% , And the color of the cured curing material may represent a color corresponding to the ratio at which each curing material is cured.

The cured color of the curing raw material used in the 3D printing apparatus 100 of the present invention may vary depending on the light transmittance and the wavelength band of the irradiated light.

In addition, the 3D printing apparatus 100 according to an embodiment of the present invention can increase the resolution of 3D printing because the liquid crystal matrix mask can be positioned close to the curing raw material (for example, 10 mm or less). Further, since the accuracy of the 3D printing apparatus of the present invention is determined by a plurality of pixel sizes included in the liquid crystal matrix mask, by adjusting the plurality of pixel sizes (for example, adjusting the cell size to 5 m) Can be improved.

In addition, since the 3D printing apparatus 100 according to the present invention is provided with different wavelength filters for each pixel, it is possible to simultaneously irradiate lights of different wavelengths and to enlarge the size of the liquid crystal matrix mask 120 For example, 1m * 1m or more).

In addition, the 3D printing apparatus 100 according to an embodiment of the present invention increases the 3D printing speed compared to the conventional 3D printing method because it stacks up the lamination section in the face-type laminating method.

4 is a diagram for explaining a method of operating the 3D printing apparatus 100 according to an embodiment of the present invention.

The 3D printing apparatus 100 irradiates the light source 110 through the liquid crystal matrix mask 120 under the control of the control unit 150 to the curing raw material, (Corresponding to the pattern of the liquid crystal matrix mask 120) of the laminate section 400 and the curing raw material is laminated again on the top of the cured laminate section 400 by the predetermined lamination thickness, ) Is sequentially lowered by the layer thickness, and the above-described operation is repeated to perform 3D printing.

5 is a view for explaining a method of operating the 3D printing apparatus 100 according to another embodiment of the present invention.

Referring to FIG. 5, the curing material application device 140 may be in a form different from the curing material application device 140 in FIG.

In step (a), the 3D printing apparatus 100 moves the curing material applicator 140 to the left and right through the control of the controller 150, while applying the red curing material to the sample shelf 130 to a predetermined thickness The light source 110 is irradiated to the curing raw material through the liquid crystal matrix mask 120 based on the first pattern of the liquid crystal matrix mask 120 to form the first shape 50 of the first laminated cross- .

In step (b), the 3D printing apparatus 100 cleans the red curing material through the control of the controller 150, and moves the curing material applying apparatus 140 to the left and right while moving the green curing material to the sample rack 130 and a light source 110 is irradiated to the curing material through the liquid crystal matrix mask 120 based on the second pattern of the liquid crystal matrix mask 120 to form the green curing material in the first lamination The second shape 51 of the cross section can be cured.

In step (c), the 3D printing apparatus 100 cleans the green curing material through the control of the controller 150, and moves the curing material applying apparatus 140 to the left and right while moving the blue curing material to the sample rack And the light source 110 is irradiated to the curing raw material through the liquid crystal matrix mask 120 based on the third pattern of the liquid crystal matrix mask 120 to form the blue curable raw material in the first lamination Section can be cured by the third shape 52 of the end face.

Then, the 3D printing apparatus 100 may clean the blue curing material through the control of the controller 150, and lower the sample shelf 130 by the thickness of the stack. The 3D printing apparatus 100 repeats the above operation through the control of the controller 150, thereby making 3D printing.

6 is a flowchart illustrating an example of a 3D printing method using a liquid crystal matrix as a mask according to an embodiment of the present invention.

Referring to FIG. 6, in step S601, the 3D printing apparatus 100 can determine the pattern of the liquid crystal matrix mask based on the information about the stacked cross section read from the memory 160. FIG. Here, the memory 160 may store information about the 3D drawing and each stacked cross section.

The 3D printing apparatus 100 can adjust transmittance of light passing through each wavelength filter of each pixel of the liquid crystal matrix mask 120 based on the pattern of the liquid crystal matrix mask 120 in step S603.

In step S605, the 3D printing apparatus 100 may irradiate the upper portion of the liquid crystal matrix mask 120 with light so as to cure the curing raw material into the shape of the laminate section.

Although not shown in FIG. 6, the 3D printing method includes a step (not shown) of lowering the sample rack 130 by a predetermined stacking thickness so that the curing raw material is stacked again on the cured lamination section after step S605 .

Although not shown in FIG. 6, in step S603, the 3D printing method includes three wavelength filters for transmitting the first wavelength band, the second wavelength band, and the third wavelength band for each pixel of the liquid crystal matrix mask 120 (Not shown) for adjusting the transmittance of the passing light. At this time, the curing raw material is preferably a mixture of a first curing raw material which is cured by the light of the first wavelength band, a second curing raw material which is cured by the light of the second wavelength band and a third curing raw material which is cured by the light of the third wavelength band . ≪ / RTI >

Although not shown in Fig. 6, the 3D printing method adjusts the transmittance of light passing through the three wavelength filters based on the information on the lamination cross-section in step S603, so that the first curing raw material, the second curing raw material, The curing ratio of each of the raw materials can be determined. Here, the first curing raw material indicates a first color when cured by light in the first wavelength band, the second curing raw material indicates a second color when cured by light in the second wavelength band, and the third curing raw material May exhibit a third color when cured by light in the third wavelength band. The cured color of the curing raw material may be determined according to the curing ratio of each of the first curing raw material, the second curing raw material and the third curing raw material.

Although not shown in FIG. 6, in step S603, the 3D printing method determines the transmittance of light passing through the two wavelength filters that transmit the first wavelength band and the second wavelength band for each pixel of the liquid crystal matrix mask 120 (Not shown). At this time, the curing raw material may include a first curing raw material which is cured by the light of the first wavelength band and a second curing raw material which is cured by the light of the second wavelength band.

Although not shown in FIG. 6, in the step S603, the 3D printing method adjusts the transmittance of light passing through the two wavelength filters based on the information on the lamination cross-section, so that the curing ratio of each of the first curing raw material and the second curing is You can decide. Here, the first curing raw material may exhibit a first color when cured by light of the first wavelength band, and the second curing raw material may exhibit a second color when cured by light of the second wavelength band. Thus, the cured color of the curing raw material can be determined according to the curing ratio of each of the first curing raw material and the second curing raw material.

Although not shown in FIG. 6, after the step S605, the 3D printing method is a method in which the curing raw material is mixed with a different type of curing raw material (the first curing raw material, 2 curing raw material and a third curing raw material) sequentially (not shown). Here, the first curing raw material indicates a first color when cured by light in the first wavelength band, the second curing raw material indicates a second color when cured by light in the second wavelength band, and the third curing raw material May exhibit a third color when cured by light in the third wavelength band.

Although not shown in Fig. 6, the 3D printing method includes a step (not shown) of irradiating light before the second curing raw material is applied after the first curing raw material is applied in step S605, the first curing raw material is washed (Not shown) of irradiating light after the second curing raw material is applied and a step of irradiating light after the second curing raw material is washed and the third curing raw material is applied (not shown).

Although not shown in FIG. 6, the 3D printing method includes a step (not shown) of lowering the sample shelf 130 by a predetermined stacking thickness after the third curing raw material is applied and light is irradiated after step S605 .

In the above description, steps S601 to S605 may be further divided into further steps or combined into fewer steps, according to an embodiment of the present invention. Also, some of the steps may be omitted as necessary, and the order between the steps may be changed.

An embodiment of the present invention may also be embodied in the form of a program stored on a medium executed by a computer or a recording medium including instructions executable by the computer.

Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium can include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be.

It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

It is intended that the present invention covers the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents. .

100: 3D printing device
110: Light source
120: liquid crystal matrix mask
130: Sample Shelf
140: Curing material dispensing device
150:
160: Memory

Claims (25)

In a 3D printing apparatus using a liquid crystal matrix as a mask,
A liquid crystal matrix mask including a plurality of pixels and including at least one wavelength filter for transmitting light of a predetermined wavelength band for each pixel;
An attenuator provided for each of the wavelength filters to adjust transmittance of light;
A sample shelf on which the curing raw materials are stacked;
A controller for controlling the attenuator and the sample shelf; And
Memory that stores information about 3D drawings and each stacked section
, ≪ / RTI &
Wherein the control unit determines the pattern of the liquid crystal matrix mask based on the information on the lamination cross section read out from the memory and controls the transmissivity of each of the attenuation units based on the pattern of the liquid crystal matrix mask, Irradiating light to the upper portion to cure the laminated cured raw material into the shape of the laminate section,
Wherein the liquid crystal matrix mask includes at least two wavelength filters for transmitting light of the first wavelength band and the light of the second wavelength band,
Wherein the curing raw material comprises a first curing raw material which is cured by light of the first wavelength band and a second curing raw material which is cured by light of the second wavelength band,
Wherein the control unit controls the transmittance of each of the at least two wavelength filters to determine a curing ratio of each of the first curing raw material and the second curing raw material.
The method according to claim 1,
Wherein the control unit is configured to control movement of the sample lathe so that curing material is deposited again on top of the cured laminate cross-section.
The method according to claim 1,
Wherein the liquid crystal matrix mask includes three wavelength filters for transmitting a first wavelength band, a second wavelength band and a third wavelength band for each pixel,
Wherein the curing raw material comprises a first curing raw material which is cured by the light of the first wavelength band, a second curing raw material which is cured by the light of the second wavelength band, and a third curing raw material which is cured by the light of the third wavelength band Wherein the 3D printing device includes a raw material.
The method of claim 3,
And a light source to which light is irradiated by the control unit,
Wherein the light emitted from the light source is broadband including the first wavelength band to the third wavelength band.
The method of claim 3,
The control unit controls the transmittance of the attenuation unit provided in each of the three wavelength filters based on the information on the lamination cross-section to determine the curing ratio of each of the first curing raw material, the second curing raw material and the third curing raw material A 3D printing device.
6. The method of claim 5,
Wherein the first curing raw material exhibits a first color when cured by the light and the second curing raw material exhibits a second color when cured by the light and the third curing raw material is cured by the light The third color,
Wherein the curing raw material determines the cured color of the curing raw material in accordance with a curing ratio of each of the first curing raw material, the second curing raw material and the third curing raw material.
delete The method according to claim 1,
Wherein the control unit controls the transmittance of the attenuation unit provided in each of the two wavelength filters based on information on the lamination cross section to determine a curing ratio of each of the first curing raw material and the second curing raw material. .
9. The method of claim 8,
Wherein the first curing raw material exhibits a first color when cured by the light and the second curing raw material exhibits a second color when cured by the light,
Wherein the curing raw material determines the cured color of the curing raw material according to a curing ratio of each of the first curing raw material and the second curing raw material.
The method according to claim 1,
Further comprising a curing material applying device for applying the curing material to the sample rack by a predetermined lamination thickness,
Wherein the control unit controls the curing material applicator to sequentially apply different types of curing materials.
11. The method of claim 10,
The control unit controls the curing material application apparatus to sequentially apply the first curing raw material, the second curing raw material and the third curing raw material on the basis of the pattern of the liquid crystal matrix mask,
Wherein the first curing raw material exhibits a first color when cured by the light and the second curing raw material exhibits a second color when cured by the light and the third curing raw material is cured by the light And the second color represents a third color.
12. The method of claim 11,
Wherein the control unit irradiates the light after the first curing raw material is applied and before the second curing raw material is applied, irradiates the light after the first curing raw material is washed and the second curing raw material is applied, Wherein the second curing raw material is washed and irradiates the light after the third curing raw material is applied.
13. The method of claim 12,
Wherein the control unit controls the sample rack to descend after the third curing raw material is applied and the light is irradiated.
In a 3D printing method using a liquid crystal matrix as a mask,
Determining a pattern of a liquid crystal matrix mask based on information on a stacked cross section read from the memory;
Adjusting a transmittance of light passing through each wavelength filter of each pixel of the liquid crystal matrix mask based on the pattern of the liquid crystal matrix mask;
Irradiating light onto the liquid crystal matrix mask to cure the curing raw material into the shape of the laminate section
, ≪ / RTI &
Wherein the liquid crystal matrix mask includes at least two wavelength filters for transmitting light of the first wavelength band and the light of the second wavelength band,
Wherein the curing raw material comprises a first curing raw material which is cured by light of the first wavelength band and a second curing raw material which is cured by light of the second wavelength band,
The step of adjusting the transmittance of light passing through each wavelength filter of each pixel
And controlling the transmittance of each of the at least two wavelength filters to determine a curing ratio of each of the first curing raw material and the second curing raw material.
15. The method of claim 14,
Further comprising lowering the sample lathe by a predetermined lamination thickness so that the curing raw material is deposited again on top of the cured laminated section.
15. The method of claim 14,
The step of adjusting the transmittance of light passing through each wavelength filter of each pixel
Adjusting the transmittance of light passing through the three wavelength filters transmitting the first wavelength band, the second wavelength band and the third wavelength band for each pixel of the liquid crystal matrix mask,
Wherein the curing raw material comprises a first curing raw material which is cured by the light of the first wavelength band, a second curing raw material which is cured by the light of the second wavelength band, and a third curing raw material which is cured by the light of the third wavelength band ≪ / RTI > and the raw material.
17. The method of claim 16,
The step of adjusting the transmittance of light passing through each wavelength filter of each pixel
Wherein the curing ratio of each of the first curing raw material, the second curing raw material and the third curing raw material is determined by adjusting the transmittance of light passing through the three wavelength filters based on the information on the lamination cross section. Printing method.
18. The method of claim 17,
Wherein the first curing raw material exhibits a first color when cured by the light and the second curing raw material exhibits a second color when cured by the light and the third curing raw material is cured by the light The third color,
Wherein the curing raw material determines the cured color of the curing raw material according to a curing ratio of the first curing raw material, the second curing raw material and the third curing raw material, respectively.
15. The method of claim 14,
The step of adjusting the transmittance of light passing through each wavelength filter of each pixel
Adjusting the transmittance of light passing through the two wavelength filters transmitting the first wavelength band and the second wavelength band for each pixel of the liquid crystal matrix mask,
Wherein the curing raw material comprises a first curing raw material which is cured by the light of the first wavelength band and a second curing raw material which is cured by the light of the second wavelength band.
20. The method of claim 19,
The step of adjusting the transmittance of light passing through each wavelength filter of each pixel
Wherein the curing ratio of each of the first curing raw material and the second curing is determined by adjusting the transmittance of light passing through the two wavelength filters based on the information on the lamination cross section.
21. The method of claim 20,
Wherein the first curing raw material exhibits a first color when cured by the light and the second curing raw material exhibits a second color when cured by the light,
Wherein the curing raw material determines the cured color of the curing raw material according to the curing ratio of each of the first curing raw material and the second curing raw material.
15. The method of claim 14,
Further comprising the step of sequentially applying the curing raw material to the sample rack on which the curing raw material is laminated, the other kinds of the curing raw materials by a predetermined lamination thickness.
23. The method of claim 22,
The step of sequentially applying the curing raw material
The first curing raw material, the second curing raw material and the third curing raw material sequentially,
Wherein the first curing raw material exhibits a first color when cured by the light and the second curing raw material exhibits a second color when cured by the light and the third curing raw material is cured by the light ≪ / RTI > and the third color if present.
24. The method of claim 23,
Wherein the step of irradiating light onto the liquid crystal matrix mask comprises:
Irradiating the light after the first curing material is applied and before the second curing material is applied;
Irradiating the light after the first curing raw material is washed and the second curing raw material is applied; And
Irradiating the light after the second curing raw material is washed and the third curing raw material is applied
/ RTI >
24. The method of claim 23,
The step of lowering the sample shelf by a predetermined lamination thickness
Wherein the third curing raw material is applied and the sample rack is lowered after the light is irradiated.

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