KR20200055816A - 3d printer and 3d printing system that implementing technology of craftsman - Google Patents

Abstract

Provided are a 3D printer and a 3D printing system implementing a technique of artisan. The 3D printer according to an embodiment of the present invention comprises: a vat for accommodating a liquid photocurable resin; a projector for curing the liquid photocurable resin by irradiating, to the vat, pattern light corresponding to a tomographic image; a build platform for supporting a printout formed as the liquid photocurable resin is cured; and a processor for controlling the projector and the build platform, wherein the projector includes a plurality of light sources which are a source of light, a condensing lens which condenses light emitted from the light sources, and a projection panel which projects the condensed light onto the pattern light corresponding to the tomographic image. In addition, the processor controls the projector and the build platform based on 3D model drawing information for each artwork of a plurality of pre-registered artisans.

Description

3D printer and 3D printing system that realizes craftsmanship technology {3D PRINTER AND 3D PRINTING SYSTEM THAT IMPLEMENTING TECHNOLOGY OF CRAFTSMAN}

The present invention relates to a 3D printer and a 3D printing system that embody craftsmanship.

More specifically, the present invention relates to a 3D printer and a 3D printing system that embody artisan technology by rapidly and accurately outputting a 3D object through projection that constantly irradiates light while improving light intensity.

In general, in order to manufacture a prototype having a three-dimensional solid shape, a method of manufacturing woodwork by hand and a method of manufacturing by CNC milling are widely known depending on drawings.

However, since the woodworking manufacturing method is manual, it is difficult to perform precise numerical control and takes a lot of time, and the manufacturing method by CNC milling is capable of precise numerical control, but there are many shapes that are difficult to process due to tool interference.

Accordingly, recently, a so-called 3D printing method has emerged, in which a designer and a designer of a product generates 3D modeling data using CAD and produces a prototype of a 3D shape using the generated data. Is used in various fields such as industry, life, and medicine.

These 3D printers use laser light on a photocurable resin, using SLA method (StereoL ithography Apparatus) using the principle that the scanned part is cured, and SLA method using a functional polymer or metal powder instead of photocurable resin and laser beam SLP method (Slective Laser Sintering), FDM method (Fused Deposition Modeling) and DLP method using the principle of partially curing by irradiating light to the bottom of the storage tank in which the photocurable resin is stored (Digital Light Processing).

Among them, the DLP-type 3D printer has an excellent surface quality, and can output a precise three-dimensional three-dimensional structure, and has a merit of generating a three-dimensional structure in layers to provide a fast printing speed.

However, the DLP 3D printer has a problem in that it is difficult to accurately output a large-sized 3D object. The reason is that in order to output an object in a large size, it is necessary to irradiate pattern light suitable for the size of the object. When the irradiation area of the pattern light is wide, the intensity of light decreases and it is difficult to irradiate uniform pattern light. There is a problem in that the output speed is lowered due to distortion or hardening of the photocurable resin.

In addition, the DLP 3D printer has a bat (VAT) containing a liquid photocurable resin, which has elasticity on the bottom of the bat to prevent adhesion between the cured resin layer and the bottom of the bat according to pattern light irradiation. It can be coated with a transparent coating agent or coated with an elastic transparent film so that the cured resin layer and the bat can be smoothly separated.

However, such an elastic coating agent and an elastic film have a short life due to problems such as damage or haze as 3D printing is performed, and after a predetermined printing, it must be removed and coated again. As it is consumed, there is a problem that the productivity of the 3D printer decreases.

KR 10-1533374 B1

The present invention has been proposed to solve the above-mentioned problems, while improving the light intensity of the patterned light, a 3D printer and a 3D printing system capable of quickly printing sophisticated three-dimensional objects without limitation in size through a projector that uniformly irradiates light. Want to provide

In addition, the present invention is to provide a 3D printer and a 3D printing system capable of further improving the printing speed through a bat having an improved lifespan while smoothly separating a resin layer rapidly cured with pattern light having high intensity.

In addition, the present invention is to provide a 3D printer and a 3D printing system capable of interworking with external devices and servers in order to minimize positional / temporal / technical constraints in the process of 3D printing.

However, the technical problems to be achieved by the present invention and embodiments of the present invention are not limited to the technical problems as described above, and other technical problems may exist.

A 3D printer and a 3D printing system embodying craftsmanship according to an embodiment of the present invention include a bat that accommodates a liquid photocurable resin; A projector that cures the liquid photocurable resin by irradiating pattern light corresponding to a tomographic image on the bat; A build platform that supports the output that is molded as the liquid photocurable resin is cured; And a processor that controls the projector and the build platform, wherein the projector includes a plurality of light sources that are light sources, a condensing lens that condenses light emitted from the light sources, and the condensed light in a tomographic image. And a projection panel projecting with a corresponding pattern light, wherein the processor controls the projector and the build platform based on 3D model drawing information for each art object registered in advance.

In this case, the condensing lens includes a condensing lens including the plurality of incidence surfaces and one exit surface, and the plurality of light sources respectively emit light on different incidence surfaces, and the condensing lens comprises: And a plurality of optical paths for guiding light incident on the incident surface to the one exit surface.

Further, the plurality of optical paths is formed of a different medium from a part of the adjacent condensing lenses.

Meanwhile, the projection panel converts light emitted from the condensing lens into pattern light corresponding to the tomographic image based on one of a micro-mirror method (DMD) and a direct irradiation method using a liquid crystal (LED). do.

In addition, the bat includes a bottom portion formed of a release coating agent or a release material that transmits the pattern light, a side portion surrounding the bottom portion, and a coupling portion detachably coupling the bottom portion to the side portion, and of the bat It is disposed on the inner bottom surface, and further includes a glass plate in which a plurality of holes are formed in a mesh structure, and the side portion fixes the glass plate and permeates air toward the glass plate.

Here, the build platform includes a build plate for supporting an output object to be molded as the photocurable resin is cured in the bat, and a lift motor for elevating the build plate, and the processor includes the build plate as the single layer The elevating motor is controlled to raise in one step by the layer height for the image.

In addition, a 3D printer and a 3D printing system that implements craftsmanship technology according to an embodiment of the present invention include: a 3D printer that implements the craftsmanship technology; And a first server, wherein the 3D printer further includes a communication unit that transmits and receives data to and from the first server. The processor further includes: a plurality of artisans each registered in art from the first server; The 3D model drawing information is received, and the projector and the build platform are controlled based on the received 3D model drawing information, and the first server provides art information of the plurality of artisans satisfying a predetermined criterion as a second. Acquiring from at least one of a server and an external device, generating 3D model drawing information for the art based on the acquired art information, transmitting the generated 3D model drawing information to the communication unit, and the first server Is, transmits at least one of the art information and the 3D model drawing information to the user terminal, and the user from the user terminal The selection information for a specific art object to be output through the 3D printer is received, and the 3D model drawing information to be transmitted to the communication unit is determined based on the received selection information.

The 3D printer and the 3D printing system implementing the craftsmanship technology according to the embodiment of the present invention can provide a projector that uniformly irradiates high-intensity patterned light to quickly print a sophisticated three-dimensional object without limitation in size.

In addition, the 3D printer and the 3D printing system implementing the craftsmanship technology according to the embodiment of the present invention can improve productivity through a bat with improved lifespan while being smoothly separated from the resin layer rapidly cured by high intensity pattern light. have.

In addition, 3D printers and 3D printing systems that implement craftsmanship technology according to an embodiment of the present invention provide a 3D printing operation interworking with external devices and servers, thereby providing location / time / technical constraints in the process of 3D printing. Can be minimized.

However, the effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood from the following description.

1A is a flowchart illustrating a process of generating a 3D printing result by implementing a craftsmanship technique according to an embodiment of the present invention.
1B is a block diagram showing a 3D printing system according to an embodiment of the present invention.
2 is a conceptual diagram showing a schematic structure of a 3D printer according to an embodiment of the present invention.
3 is a flowchart showing an output process of a 3D printer according to an embodiment of the present invention.
4 is a flowchart showing a pattern light irradiation process according to an embodiment of the present invention.
5A shows a condensing lens for condensing light output from a plurality of light sources according to an embodiment of the present invention.
5B shows a condensing lens for condensing light output from a plurality of light sources according to another embodiment of the present invention.
5C illustrates a condensing lens for condensing light output from a plurality of light sources according to another embodiment of the present invention.
5D shows a condensing lens for condensing light output from a plurality of light sources according to another embodiment of the present invention.
5E illustrates a condensing lens for condensing light output from a plurality of light sources according to another embodiment of the present invention.
6 is an enlarged view of a part of a projection panel according to an embodiment of the present invention.
7A and 7B are diagrams illustrating a state in which one resin layer forming a 3D object according to an embodiment of the present invention is formed.
8A is a cross-sectional view of a bat according to an embodiment of the present invention.
8B is a cross-sectional view of a bat according to another embodiment of the present invention.
8C is a cross-sectional view of a bat according to another embodiment of the present invention.
8D is a cross-sectional view of a bat according to another embodiment of the present invention.
8E is a view showing various examples of the glass plates of FIGS. 8C and 8D.
9 shows a state in which a 3D object is finally output.

The present invention can be applied to various transformations and may have various embodiments, and specific embodiments will be illustrated in the drawings and described in detail in the detailed description. Effects and features of the present invention and methods for achieving them will be clarified with reference to embodiments described below in detail with reference to the drawings. However, the present invention is not limited to the embodiments disclosed below and can be implemented in various forms. In the following examples, terms such as first and second are not used in a limited sense, but for the purpose of distinguishing one component from other components. Also, a singular expression includes a plural expression unless the context clearly indicates otherwise. In addition, terms such as include or have means that a feature or component described in the specification exists, and does not preclude the possibility of adding one or more other features or components in advance. In addition, in the drawings, the size of components may be exaggerated or reduced for convenience of description. For example, since the size and thickness of each component shown in the drawings are arbitrarily shown for convenience of description, the present invention is not necessarily limited to what is illustrated.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, and the same or corresponding components will be denoted by the same reference numerals, and redundant description thereof will be omitted. .

-3D printing system

1B is a block diagram showing a 3D printing system according to an embodiment of the present invention.

Referring to FIG. 1B, a 3D printing system according to an embodiment may include a 3D scanner 30, a 3D modeling computer 20, a 3D printer 10, a craftsmanship management server 40 and a terminal 50. have.

First, the 3D scanner 30 acquires shape information for generating a 3D model drawing by 3D scanning an object to be output, and can generate 3D model drawing information based on the acquired shape information.

In addition, the 3D scanner 30 may transmit and receive 3D model drawing information in cooperation with the artisan technology management server 40. That is, the 3D scanner 30 may assist in the printing operation of the 3D printer 10 using 3D model drawing information generated by itself and / or 3D model drawing information received from the artisan technology management server 40. .

Meanwhile, the 3D modeling computer 20 may enable a product designer or designer to design a virtual 3D stereoscopic object through a 3D modeling tool, and generate 3D model drawing information based on the designed virtual 3D stereoscopic object can do.

In addition, the 3D modeling computer 20 may transmit / receive 3D model drawing information in connection with the craftsmanship technology management server 40, and receive 3D model drawing information and / or craftsmanship technology management server 40 generated by itself. The printing operation of the 3D printer 10 may be assisted by using the 3D model drawing information.

In an embodiment, the 3D printing system including the 3D scanner 30 and / or the 3D computer 20 scans an object to be output from the 3D scanner 30, and scans the object's scan data from the 3D modeling computer 20. After processing, the 3D shape of the object is designed as a 3D model drawing, and the 3D printer 10 outputs a 3D stereoscopic object according to the designed 3D model drawing information, thereby realizing the desired output object in real time. have.

Next, the artisan technology management server 40 can manage 3D model drawing information for various art works of artisans who produce high-level sophisticated art work, and 3D scanner 30 for 3D model drawing information for various art works. , 3D modeling computer 20, 3D printer 10, the terminal 50, and at least any one of the other servers can be transmitted and received through the network.

That is, the artisan technology management server 40 may assist in providing an effective 3D printer that implements artisan technology by transmitting and receiving data with other components of the 3D printing system.

In an embodiment, the craftsmanship management server 40 may transmit various data necessary for execution of an application installed in the terminal 50, and may store and store information received from the terminal 50 in a database.

In addition, the artisan technology management server 40 may serve as a relay for various data transmitted and received between components of the 3D printing system.

Further, in the embodiment, the craftsmanship management server 40 may include at least one or more of a control unit, a database, an art registration unit, and a data transmission / reception unit, and may be a server outside the 3D printing system according to an embodiment.

Meanwhile, the terminal 50 may be a portable terminal in which an application providing a 3D printing function to implement the craftsmanship is installed, a smart phone, a terminal for digital broadcasting, a mobile phone, personal digital assistants (PDA), and a portable multimedia player (PMP). ), Navigation, tablet PC (tablet PC), wearable device (wearable device) and smart glass (smart glass).

In addition, the terminal 50 can access a 3D printing service that implements craftsmanship technology based on wired / wireless communication, such as a fixed terminal, a desktop PC, a laptop computer, and a personal computer such as an ultrabook. It may further include a device.

In an embodiment, such a 3D printing system can effectively output an art object, which is an object in which a craftsmanship technique is applied, through the 3D printer 10 based on 3D model drawing information, various condensing methods, and a projector.

At this time, the artisan technique in the present invention means a technique for producing an object based on a high level of delicacy and sophistication, such as a craftsmanship.

That is, in the embodiment, the 3D printing system can quickly 3D print an art object having a very sophisticated shape with high completeness.

Thus, the 3D printing system can be widely applied to fields in which artisan technology needs to be implemented, and can also be used for services that provide 3D printed objects to multiple users.

Therefore, in order to provide high-quality 3D printing results and effective services to such a 3D printing system, a DLP (Digital Light Processing) type 3D printer capable of accurately and quickly outputting 3D objects according to 3D model drawing information ( It may be suitable that 10) is used.

Hereinafter, for convenience of explanation, an embodiment of the present invention will be described based on a DLP (Digital Light Processing) type 3D printer 10, but all types of 3D printers (10) that output light by curing it on a photocurable resin and then output it. ) Can be applied to this embodiment.

Meanwhile, each component of the 3D printing system may be connected through a network. Network means a connection structure capable of exchanging information between each node, such as 3D scanner 30, 3D modeling computer 20, 3D printer 10, artisan technology management server 40, and terminal 50. As an example of such a network, 3rd Generation Partnership Project (3GPP) network, Long Term Evolution (LTE) network, World Interoperability for Microwave Access (WIMAX) network, Internet, Local Area Network (LAN), Wireless LAN ( Wireless Local Area Network (WAN), Wide Area Network (WAN), Personal Area Network (PAN), Bluetooth network, satellite broadcasting network, analog broadcasting network, DMB (Digital Multimedia Broadcasting) network, and the like are not limited thereto. .

-3D printer overview

2 is a conceptual diagram showing a schematic structure of a 3D printer 10 according to an embodiment of the present invention.

Referring to Figure 2, the 3D printer 10 according to the embodiment, the projector (100, 200, 300, 400) (projector), bat (500) (vat), build platform (600) (build platform), external It may include a communication unit for transmitting and receiving data with at least one of the device and the external server, and a processor (processor) for controlling them.

More specifically, the projectors 100, 200, 300, and 400 include a light source 100 irradiating light, a condensing lens 200 condensing light from the light source 100, and a single layer of condensed light. It may include a projection panel 300 for converting the pattern light corresponding to the image, and a projection lens 400 for projecting the pattern light to the bat 500.

In addition, the bat 500 may be a water tank in which a liquid photocurable resin is stored, and the build platform includes a build plate and a build plate that supports an output object to be molded as the photocurable resin is cured in the bat 500. It may include a lifting motor for lifting.

Finally, the processor includes a projector control unit that controls the projector panel to sequentially output pattern light corresponding to a tomographic image within the projector, and a lift motor control unit that steps up the build plate in synchronization with sequential changes in pattern light. In the following embodiments, data processing of the projector controller and the elevator motor controller is described as being performed by one processor, but the embodiment is not limited thereto.

-3D printing process to realize craftsmanship

1A is a flowchart illustrating a process of generating a 3D printing result by implementing a craftsmanship technique according to an embodiment of the present invention. First, with reference to Figures 1a to 1b will be described in detail the process of performing 3D printing to implement the artisan technology in the 3D printing system.

First, the artisan technology management server 40 may register art information of each of a plurality of artisans. (S101)

In detail, as an embodiment, the craftsmanship management server 40 provides a network of arts and crafts information of a plurality of artisans meeting predetermined criteria (for example, craftsmen designated as human cultural properties recognized for their technical and artistic abilities). It can be collected in conjunction with an external server such as a web server.

Alternatively, the artisan technology management server 40 may obtain artisan information of artisans meeting a predetermined criterion based on information input by a user through the terminal 50 or the 3D modeling computer 20.

In addition, the artisan technology management server 40 may register and store received art information in a database.

Next, the artisan technology management server 40 may acquire and register 3D model drawing information for each stored art object. (S103)

In detail, in the embodiment, the artisan technology management server 40 may generate 3D model drawing information for each art based on the registered art information, and store the generated 3D model drawing information in a database.

For example, the artisan technology management server 40 may generate 3D model drawing information for 3D printing based on image data of a corresponding art object provided by registered art information.

In addition, the artisan technology management server 40 may also obtain and obtain 3D model drawing information for registered art information from the 3D scanner 30 and / or the 3D modeling computer 20. For example, the artisan technology management server 40 may compare 3D model drawing information received from the 3D scanner 30 and / or 3D modeling computer 20 with image data provided by registered art information, and compare them. As a result, when it is determined that the object is the same, the corresponding art object and the received 3D model drawing information may be matched and stored.

Alternatively, the artisan technology management server 40 may receive and obtain 3D model drawing information for registered art information from another server related to the 3D drawing.

In this way, the artisan technology management server 40 that has registered 3D model drawing information may provide registered art information and / or 3D model drawing information as a user application. (S105)

In detail, the artisan technology management server 40 receives the execution signal of the application from the terminal 50 on which the application providing the 3D printing function for implementing the artisan technology is installed, and transmits data for operating the application to the corresponding terminal ( 50).

In addition, the artisan technology management server 40 may transmit art information and / or 3D model drawing information of artisans stored in the database to the corresponding terminal 50 to provide to the user. In the above description, it was explained that the craftsmanship management server 40 and the user terminal 50 transmit and receive data for a 3D printing function that implements the craftsmanship technology, but the craftsmanship management server 40 and the 3D modeling computer 20 Various embodiments, such as transmitting and receiving data for a 3D printing function implementing artisan technology, will also be possible.

Subsequently, the artisan technology management server 40 providing art information and / or 3D model drawing information as a user application may receive selection information for a specific art from the user application. (S107)

In detail, the craftsmanship management server 40 may receive selection information for a specific art object to be input by the user through the interface provided by the terminal 50 in which the application is installed.

In addition, the artisan technology management server 40 may transmit 3D model drawing information for the corresponding art object to the 3D printer 10 based on the received selection information. (S109)

In detail, the artisan technology management server 40 may determine 3D model drawing information for a specific art object selected by the user for 3D printing based on the received selection information, and extract the determined 3D model drawing information from the database Can be sent to the 3D printer 10.

Thus, the artisan technology management server 40 may assist the 3D printer 10 to output a specific artwork requested by the user as a 3D printing result.

In addition, the craftsmanship technology management server 40 can provide a user with 3D printing of arts and craftsmanship art grafted in the same manner as described above, so that the user can conveniently acquire artisans of artisans, and positional / temporal / technical constraints. It can provide 3D printing function with minimized.

-3D printer printing process

3 is a flowchart showing the output process of the 3D printer 10 according to an embodiment of the present invention. Hereinafter, a process of outputting a 3D object by the 3D printer 10 will be described in detail with reference to FIG. 3.

First, the processor may receive 3D model drawing information about an object to be output from the 3D scanner 30 and / or the 3D modeling computer 20. (S201)

Further, the processor may receive 3D model drawing information from the artisan technology management server 40. That is, the processor can easily obtain and use 3D model drawing information designed from craftsmen with high technical skills in various places by acquiring 3D model drawing information without limitations on location and time through the artisan technology management server 40. .

In an embodiment, the processor can easily obtain a 3D model drawing designed by a craftsman who has high technical skills with respect to a work of art (for example, lacquerwork) having a pattern of a fine embossed shape. Thereafter, the processor may slice the 3D model drawing along the output direction based on the received 3D model drawing information, and decompose it into a plurality of 2D tomographic images. (S203) Unlike this embodiment, an embodiment in which a plurality of tomographic images that have been previously decomposed is sequentially output is also possible.

For example, the processor may obtain a tomography image that is decomposed by slicing a 3D model drawing showing a bare lacquer product along a direction of output.

Thereafter, the processor may control the projection panel 300 to irradiate pattern light corresponding to a tomography image to the lower portion of the bat 500. (S205)

When the pattern light is irradiated, the liquid photo-curing resin between the bottom surface of the bat 500 and the build plate is cured into a solid resin layer having a shape corresponding to a tomographic image by the pattern light, and the cured resin layer is used as a three-dimensional object. It forms one layer.

 After the resin layer is cured, the lifting motor operates to raise the build plate, so that the liquid photocurable resin may be introduced between the build plate and the bottom of the bat 500 again. (S207)

7A and 7B, the processor 700 irradiates pattern light corresponding to the next tomographic image, and controls the lifting motor 620 again when the resin layer is cured according to the pattern tomography to build plate 610 ) Can be increased by a higher height.

When the resin layer corresponding to the final tomographic image is cured by repeating the above process, 3D printing may be terminated. (S209)

Thereafter, by separating the output object, which is a combination of the cured resin layers, in the build plate 610, a printed three-dimensional object can be output.

As described above, the processor may generate a 3D object more efficiently by performing a 3D printing operation in conjunction with the artisan technology management server 40 and / or an external device, and position / time in the process of 3D printing. / Minimize technical constraints.

In order to output a faster and more precise object in the printing process, the intensity of the projected pattern light must be strong and it is necessary to irradiate the pattern light with a uniform intensity over the entire irradiation area.

-Projector light irradiation process

Hereinafter, the projector light irradiation process for outputting a 3D object more quickly and accurately will be described in detail.

4 is a flowchart showing a pattern light irradiation process according to an embodiment of the present invention. Referring to Figure 4 in more detail the process of irradiating the pattern light, first, the projector according to the embodiment, includes a plurality of light sources 100, the plurality of light sources 100 according to the situation Light intensity can be adjusted by turning it on / off. (S301) That is, in order to increase the output speed, the projector according to the embodiment may emit at least two or more light sources 100 to improve the amount of light.

The light source 100 may be an ultraviolet laser diode (UV LD) including a nitride-based material that emits ultraviolet light having a wavelength of less than 405 nm.

Next, light from the plurality of light sources 100 may be condensed through a condensing lens 200. (S303)

In detail, the condensing lens 200 may emit light emitted in different directions from a plurality of light sources 100, including at least one lens, and then exit toward the projector panel.

The condensing lens 200 according to this embodiment may be configured as a lens array, in detail, a condensing lens for condensing a plurality of laser diode lights, and an output for emitting light emitted from the condensing lens toward the position of the project panel It may include a lens.

Hereinafter, the condensing lens 200 according to various embodiments will be described with reference to FIGS. 5A to 5D. 5A to 5D, the surfaces of the lenses are all shown as planes, but as shown, the planes of the lenses may be one of convex surfaces, flat surfaces, concave surfaces, inclined surfaces, and Fresnel surfaces. The shape will not be difficult to envision depending on the role of each lens.

Further, depending on the role, a lens shown as one lens may also be implemented as a plurality of lenses.

That is, although the lens illustrated in FIG. 5 is shown as one square as a unit that plays one role, various lens arrays configured by changing shapes, numbers, etc. to perform one role will also be included in the present invention.

In addition, the arrow in FIG. 5 indicates the light exit direction.

-Condensing lens first embodiment

5A shows a condensing lens 200 for condensing light output from a plurality of light sources 100 according to an embodiment of the present invention.

Referring to FIG. 5A, the condensing lens 200 according to an exemplary embodiment includes light of the first condensing lens CL1 and the second laser diode LD2 condensing the light of the first laser diode LD1. A second condenser lens CL2 for condensing and a third condenser lens CL3 for condensing light from the third laser diode LD3 may be included.

In addition, the first condenser lens CL1 emits the condensed light to the second condenser lens CL2, and the third condenser lens CL3 emits the condensed light to the third condenser lens CL3, and the second condensers The lens CL2 may collect light emitted from the first and third condensing lenses CL1, CL2, and CL3 and light emitted from the second laser diode LD2 to be output to the output lens PL.

Finally, the output lens PL can generate panel light having a high intensity by condensing and emitting light emitted from the second laser diode LD2 toward the projection panel 300. In addition, the laser diode can be selectively turned on / off according to the situation to adjust the light intensity to effectively output projection light.

However, in one embodiment, a plurality of lenses are required, and light efficiency may deteriorate as the lens passes, and distortion or aberration may occur in light emitted from different lenses.

-Condensing Lens Second Embodiment

5B shows a condensing lens 200 for condensing light output from a plurality of light sources 100 according to another embodiment of the present invention.

Referring to FIG. 5B, in the condensing lens 200 according to another embodiment, an incident surface where light emitted from the first to third laser diodes LD1, LD2, and LD3 are incident and light emitted is condensed and emitted. It may include a condensing lens (CL) including an emission surface to be, and an output lens (PL) for condensing and emitting light emitted from the emission surface toward the projection panel (300).

That is, in the condensing lens 200 according to the present embodiment, one condensing lens CL condenses light emitted from a plurality of laser diodes through one incidence surface and emits light from one emission surface. The light efficiency can be improved by minimizing the number, and the light uniformity of the pattern light can be increased by uniformly emitting light emitted from the emission surface.

In more detail, the incidence surface of the condenser lens CL includes a first incident region CS1 to which light of the first laser diode LD1 is incident, and a second incident region to which light of the second laser diode LD2 is incident. (CS2) and a third incident region CS3 through which light of the third laser diode LD3 is incident.

In addition, light incident on the first to third incidence regions CS1, CS2, and CS3 passes through the interior of the condensing lens CL and is condensed toward the exit region ES of the exit surface to be emitted with uniform uniformity.

In FIG. 5, the incidence areas CS1, CS2, and CS3 and the exit area ES are also illustrated in a plane, but may have various shapes for performing roles such as convex, planar, concave, and Fresnel surfaces.

At this time, the light collecting lens CL may further include a light path for guiding light from the incident area to the exit area ES in order to focus light more toward the exit area ES. The optical path may be formed through another medium or reflective coating in order to guide the light to the emission area ES while maximizing the light efficiency.

For example, the optical path includes a first optical path OP1 connecting the emission area ES in a straight line in the first incident area CS1 and a straight emission area ES in the second incident area CS2. It may include a second optical path (OP2) connecting to, and a third optical path (OP3) connecting the exit area (ES) in a straight line in the third incident area (CS3).

Condensing lens 200 according to this embodiment, while minimizing the number of lenses while supplying a high intensity and high uniformity light toward the projection panel 300, by improving the quality of the panel light, to increase the emission speed and At the same time, the accuracy of the output object can also be improved.

-Condensing lens third embodiment

Referring to FIG. 5C, in the condensing lens 200 according to another embodiment, an incident surface where light emitted from the first to third laser diodes LD1, LD2, and LD3 are incident and light emitted is condensed and emitted. It may include a condensing lens (CL1) including a light emitting surface, and an output lens (PL) for emitting light emitted from the condensing lens (CL1) toward the projection panel (300).

In more detail, the incident surface of the condenser lens CL1 includes a first incident region CS1 where light from the first laser diode LD1 is incident, and a second incident region where light from the second laser diode LD2 is incident. (CS2) and a third incident region CS3 through which light of the third laser diode LD3 is incident.

In addition, the exit surface of the condenser lens CL1 includes a first emission area ES1 through which light incident to the first incident area CS1 exits, and a second emission light from the second incident area CS2 exits. The emission area CS2 and the third emission area ES3 through which the light of the third incident area CS3 is emitted may be included.

And, the emission light of the first emission area ES1 is emitted in the direction toward the output lens PL, and the emission light of the second emission area ES2 is also emitted in the direction toward the output lens PL, and the third The emission light of the emission area ES3 may also be emitted in a direction toward the output lens PL.

That is, each emission area ES2 may change the emission direction toward the output lens PL when exiting, including an inclined surface, so that light can be collected at a uniform uniformity from the incident surface of the output lens PL.

In FIG. 5C, the incidence areas CS1, CS2, CS3 and the exit areas ES1, ES2, ES3 are also shown as planes, but they are various through convex, planar, concave, inclined and Fresnel surfaces, etc. It can have a shape.

The condensing lens 200 according to the exemplary embodiment may improve light efficiency by reducing the number of lenses, and supply light with high uniformity, thereby improving the quality of the projection light, thereby increasing the printing speed and outputting the same. The accuracy of the object can also be improved.

-Condensing Lens 4th Embodiment

5D shows a condensing lens 200 for condensing light output from a plurality of light sources 100 according to another embodiment of the present invention.

Referring to FIG. 5D, in the condensing lens 200 according to another embodiment, an incident surface to which light emitted from the first to third laser diodes LD1, LD2, and LD3 is incident and light emitted is condensed It may include a condensing lens CL including an exit surface to be emitted, and an output lens PL condensing and exiting light emitted from the exit surface toward the projection panel 300.

That is, in the condensing lens 200 according to the present embodiment, one condensing lens CL condenses light emitted from a plurality of laser diodes through a plurality of incidence surfaces, and emits light from one exit surface. The light efficiency can be improved by minimizing the number, and the light uniformity of the pattern light can be increased by uniformly emitting light emitted from the emission surface.

More specifically, the condensing lens CL includes a first incident surface CS1 condensing light from the first laser diode LD1 and a second incident surface CS2 condensing light from the second laser diode LD2. And, the third incident surface (CS3) for condensing the light of the third laser diode (LD3), and the exit surface (ES) for emitting light condensed from the first to third incident surfaces (CS1, CS2, CS3) It can contain.

That is, unlike the condenser lens CL according to the above-described exemplary embodiment, light of a plurality of laser diodes is condensed through a plurality of incidence surfaces CS1, CS2, and CS3, thereby improving condensing efficiency while reducing the size of the lens. You can.

In addition, light incident from the first to third incidence surfaces CS1, CS2, and CS3 may pass through the interior of the condensing lens CL and be emitted with a uniform uniformity from the exit surface ES.

At this time, the condenser lens CL may further include light paths OP1, OP2, and OP3 that guide light from the incident surface to the exit surface ES in order to converge more light toward the exit surface ES. The optical paths OP1, OP2, and OP3 may be formed through another medium or reflective coating in order to guide the light to the exit surface ES while maximizing the light efficiency.

For example, the optical path may include a first optical path OP1 connecting the exit surface ES at the first incident surface CS1 and a first optical path OP1 connecting the exit surface ES at the second incident surface CS2. A second optical path OP2 and a third optical path OP3 connecting the exit surface ES from the third incident surface CS3 may be included.

Condensing lens 200 according to this embodiment, while minimizing the number of lenses while supplying high intensity and high uniformity light toward the projection panel 300 to improve the quality of the panel light, while increasing the emission speed The accuracy of the output object can also be improved.

-Condensing lens fifth embodiment

Referring to FIG. 5E, the condensing lens 200 according to another embodiment condenses the incident surface and the emitted light from which the light emitted from the first to third laser diodes LD1, LD2, and LD3 are incident. It may include a condensing lens (CL) including an exit surface to exit.

That is, in the condensing lens 200 according to the present embodiment, one condensing lens CL condenses light emitted from a plurality of laser diodes through one incidence surface and then emits light from one exit surface, thereby Light efficiency can be improved by minimizing the number of light beams, and light uniformly emitted from the emission surface can be uniformly increased to increase the light uniformity of the pattern light.

To this end, the incident surface and the exit surface of the condenser lens CL may have a convex surface, a flat surface, a concave surface, an inclined surface, and a Fresnel surface, or a combination of these shapes.

As described above, the projector may emit light through the condensing lens 200 in various ways according to a plurality of embodiments, thereby helping to uniformly irradiate light while improving the light intensity of the patterned light.

-Projection panel

Returning to the description of the light projection process again, when the light collected by the condensing lens 200 is supplied to the projection panel 300, the projection panel 300 changes the supplied light to a light pattern corresponding to a tomographic image Can print (S305)

In detail, the projection panel 300 projects the light supplied from the condensing lens 200 to correspond to a tomographic image and irradiates the pattern light on the bat 500 through the projection lens 400, thereby overlapping the pattern light. The liquid photocurable resin can be cured to correspond to a tomographic image. (S307)

The projection panel 300 may be at least one of a semiconductor mirror method, a micro mirror method (DMD), or a direct irradiation method using a liquid crystal (LCD).

In an embodiment, the projection panel 300 may include an optical semiconductor (Digital Micromirror Device, DMD) including a plurality of cell micromirrors in a micromirror method (DLP).

In detail, referring to FIG. 6, the projection panel 300 includes micro-mirrors 310 constituting a plurality of cells and a switching circuit 320 that is disposed under the micro-mirrors and tilts the micro-mirrors to turn on / off. Can be. The light of the turned on micro mirror is reflected by the projection lens 400 to display bright pixels in the patterned light, and the light reflected from the turned off micro mirror is reflected by the light absorber. Therefore, in the pattern light, the projection panel 300 according to the embodiment may project the pattern light corresponding to the tomographic image through a method in which black pixels are displayed.

Since the micro-mirror type projection panel 300 projects pattern light through reflection of the mirror, light efficiency is improved by reducing light loss compared to other methods, and the projected pattern light has a small pixel spacing and thus a high illuminance ratio. Precise molding is possible. In addition, there is an advantage in that the lifespan is also long compared to the LCD method.

As described above, the processor including such a projector is sized based on a condensing lens 200 that performs effective light emission in various ways and a mirror-type projection panel 300 having good light efficiency due to low light loss. You can print elaborate 3D objects quickly without limitation.

That is, the processor is capable of performing precise 3D printing by emitting high-intensity light and uniform light, and through this, it has an effect of outputting an object having a very elaborate shape made by artisan technology more finely.

In addition, the processor including such a projector, it is possible to print an object of a precise shape at a high speed, thereby enabling mass production of objects that require high technology.

Thus, the processor can mass-produce art work reflecting artisan technology with high completeness, thereby providing commercial services utilizing the art work to many people.

In an embodiment, the processor performs a 3D printing in the same manner as above based on a tomographic image of a 3D model drawing showing a naked lacquer product to mass-produce high-quality naked lacquer 3D printing results in which the corresponding lacquer product is smallly implemented. Can produce.

Thus, in the embodiment of the present invention, it is necessary to provide a variety of services (for example, shopping malls) to a large number of users through mass production of 3D printing systems, which are difficult to mass-produce, which required considerable time and technology. can do.

-Bat

On the other hand, when the pattern light is projected to the lower portion of the bat 500, the liquid photocurable resin is cured between the bottom surface of the bat 500 and the build plate 610 to form a solid resin layer.

The bat 500 is generally formed of a material such as transparent acrylic or glass that can transmit pattern light through a photocurable resin. When the bat 500 is exposed as it is, the cured resin layer is adhered to the bat 500. When the build plate 610 is stepped up to form the next resin layer, the cured resin layer may be damaged.

In particular, when outputting high-intensity light, such as the projector according to the embodiment, the problem that the cured resin layer is adsorbed to the bat 500 may be more serious while the resin layer is rapidly cured.

To prevent this, the elevating motor 620 raises the build plate 610 to a height higher than that of the original layer resin layer for one tomographic image to separate the resin layer from the bottom surface of the bat 500, and then returns to the original. The resin layer of the original layer may be formed by descending to the height of the layer. As described above, when the build plate is controlled by two-steps to form the one-layer resin layer, it is easy to separate the bottom surface and the resin layer, and the liquid photocurable resin can be smoothly introduced between the cured resin layer and the bottom of the bat. have. However, when the resin layer is formed in two steps as described above, the printing speed may be slowed down.

-Bat first embodiment

In order to prevent the resin layer from being adsorbed, referring to FIG. 8A, a coating layer 520 that transmits pattern light may be formed on the bottom surface BS of the bat 500 according to an embodiment.

In detail, the coating layer 520 must have a high pattern light transmittance to pass the pattern light to the liquid photocurable resin side while minimizing light loss. In addition, the coating layer 520 must have a high air permeability in order to attach the cured resin layer to the build plate 610 side when the build plate 610 rises and separate from the bottom surface BS of the bat 500.

To this end, the material of the coating layer 520 may be a release agent or a release agent for transmitting pattern light (ultraviolet rays). For example, the coating layer 520 may be formed of a material such as a transparent silicone elastic coating agent (eg, seal guard 184), polytetrafluoroethylene fiber (eg, Teflon), or a transparent FEP film.

However, such a coating layer 520, when exposed to continuous pattern light, the turbidity increases, the pattern light transmittance decreases, and the flatness decreases through frequent adsorption with the resin layer. There is a hassle to do.

-Bat second embodiment

8B is a cross-sectional view of a bat 500 according to another embodiment of the present invention.

Referring to Figure 8b, the bat 500 according to another embodiment of the present invention, the transparent and flexible yet highly elastic bottom portion 520, the bottom portion 520 and the detachable side portion 510, the bottom portion It may include a coupling portion 530 for fixing the 520 to the side portion (510).

The bottom portion 520 of the highly stretchable bat 500 can be attached to the build plate 610 when the build plate 610 is raised and attached to the side of the build plate 610 and separated from the bottom surface BS of the bat 500. .

In addition, the bottom portion 520 of the bat 500 does not require a separate coating, and if it is damaged through regular use, it can be removed from the side portion 510 and easily replaced with a new bottom portion 520, so that a complicated coating operation is possible. There is an unnecessary advantage.

In addition, the material of the bottom portion 520 of the bat 500 has a higher air permeability than acrylic, and transmits a small amount of air between the liquid photo-curable resin and the bottom portion 520, thereby further curing the cured resin layer (BS ).

The bottom portion 520 of the bat 500 is formed of at least one of a silicone-based elastic material, polyhydroxyethyl methacrylate (PHEMA), polyvinyl pyrolidone (PVP), and cellulose acetate butyl (CAB), high elasticity and transparency, and air permeability. Can have

-Bat third embodiment

8C is a cross-sectional view of a bat 500 according to another embodiment of the present invention.

Referring to FIG. 8C, a bat 500 according to another embodiment includes a glass plate 550 disposed on a bottom surface BS of a basic water tank including a bottom portion 520 and a side portion 510. can do.

In detail, the glass plate 550 is hardened when the build plate 610 rises by injecting air between the glass plate 550 and the photocurable resin, including a hole h through which air can pass through the thin glass plate. The adhered resin layer is attached to the build plate 610 side and can be separated from the bottom surface BS of the bat 500 smoothly, and a liquid photocurable resin can be introduced between the bottom surface and the cured resin layer.

In more detail, a plurality of glass plates 550 are stacked to be disposed on the bottom surface BS of the bat 500, and the side supports 511 disposed around the glass plates 550 fix the glass plates 550 At the same time, it can have a structure capable of penetrating air toward the glass plate 550 side.

The lifespan of the glass plate 550 is not affected by light and has high durability against contraction / expansion, so that it can be used permanently as long as it is not damaged, thereby increasing the lifespan of the bat.

-Bat fourth embodiment

8D is a cross-sectional view of a bat 500 according to another embodiment of the present invention.

The bat 500 according to another embodiment may include a side portion 510 and a bottom portion 520 formed by stacking the glass plates 550.

In detail, the bottom part 520, a plurality of glass plates 550 having micro holes h are stacked to form the bottom part 520 of the bat 500, and the bottom part 520 of the bat 500 A circumferential support portion 513 is disposed around the circumference to be detachably coupled to the bottom portion 520. Here, the micro hole h means a hole h having a micro unit diameter.

Since the glass plate 550 has a plurality of holes (h) of a small size randomly formed to have a high air transmittance, the build plate 610 is raised by injecting air between the glass plate 550 and the photocurable resin. When the cured resin layer is attached to the build plate 610 side, it can be separated from the bottom surface (BS) of the bat 500.

In addition, the life of the glass plate 550 is less affected by light and has high durability against contraction / expansion, so that it can be used permanently as long as it is not damaged, thereby increasing the life.

When using the bat 500 of the embodiments of the present invention, even if the build plate 610 is raised in one step by the height of the original layer, the cured resin layer and the bat 500 are separated so that one resin layer is used as one step. Can form. (S309)

That is, the processor 700 controls the lifting motor 620 to raise the build plate 610 only by one layer height, and then immediately irradiates pattern light on the next tomographic image, thereby dramatically improving output speed. have.

8E is a view showing various examples of the glass plates of FIGS. 8C and 8D.

Referring to FIG. 8E (a), the glass plate 550 according to an embodiment may have a shape including a plurality of holes h of a mesh type. That is, the glass plate 550 may have a plurality of fine holes h having a lattice shape to have high air permeability.

Referring to FIG. 8E (b), the glass plate 550 according to another embodiment may include a plurality of holes h of a mesh type. That is, the glass plate 550 may have a plurality of fine holes h having a grid network shape and have high air permeability.

8E (e), the glass plate 550 according to another embodiment may include a plurality of holes h at random locations. That is, a plurality of fine holes (h) are formed in the glass plate 550, and even if the glass plates 550 are stacked in multiple layers, a high air permeability can be obtained.

9 shows a state in which a 3D object is finally output.

9 is a 3D object output from the 3D printer 10 according to an embodiment, and the resin layer can be rapidly cured through uniform and high-intensity pattern light irradiation to increase the output speed. It is also possible to reduce the height, so that the output resolution can be increased to precisely shape objects.

Furthermore, the bat 500 according to the embodiment has no distortion of the cured resin layer that is easily separated from the rapidly cured resin layer, and thus the build plate 610 can be raised in one step to further improve the output speed. have.

The embodiments according to the present invention described above may be implemented in the form of program instructions that can be executed through various computer components and can be recorded in a computer-readable recording medium. The computer-readable recording medium may include program instructions, data files, data structures, or the like alone or in combination. The program instructions recorded on the computer-readable recording medium may be specially designed and configured for the present invention or may be known and available to those skilled in the computer software field. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tapes, optical recording media such as CD-ROMs and DVDs, and magneto-optical media such as floptical disks. medium), and hardware devices specifically configured to store and execute program instructions, such as ROM, RAM, flash memory, and the like. Examples of the program instructions include not only machine language codes produced by a compiler, but also high-level language codes executable by a computer using an interpreter or the like. The hardware device can be changed into one or more software modules to perform the processing according to the present invention, and vice versa.

The specific implementations described in the present invention are exemplary embodiments, and do not limit the scope of the present invention in any way. For brevity of the specification, descriptions of conventional electronic configurations, control systems, software, and other functional aspects of the systems may be omitted. In addition, the connection or connection members of the lines between the components shown in the drawings are illustrative examples of functional connections and / or physical or circuit connections. In the actual device, alternative or additional various functional connections, physical It can be represented as a connection, or circuit connections. In addition, unless specifically mentioned, such as “essential”, “importantly”, etc., it may not be a necessary component for application of the present invention.

In addition, the detailed description of the present invention has been described with reference to preferred embodiments of the present invention, but those skilled in the art or those of ordinary skill in the art will appreciate the spirit of the present invention as set forth in the claims below. And it will be understood that various modifications and changes can be made to the present invention without departing from the technical scope. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification, but should be defined by the claims.

Claims (7)

A bat containing a liquid photocurable resin;
A projector that cures the liquid photocurable resin by irradiating pattern light corresponding to a tomographic image on the bat;
A build platform that supports the output that is molded as the liquid photocurable resin is cured; And
It includes a processor for controlling the projector and the build platform,
The projector,
A plurality of light sources as a light source, a condensing lens for condensing light emitted from the light source, and a projection panel for projecting the condensed light into pattern light corresponding to a tomographic image,
The processor,
Controlling the projector and the build platform based on 3D model drawing information for each of the pre-registered artisans
3D printer embodying craftsmanship. According to claim 1,
The condensing lens,
A condenser lens including the plurality of incident surfaces and one exit surface,
Each of the plurality of light sources emits light on different incident surfaces,
The condenser lens includes a plurality of light paths for guiding light incident on the incident surface to the one exit surface
3D printer embodying craftsmanship. According to claim 2,
The plurality of optical paths is formed of a different medium from a portion of the adjacent condenser lens
3D printer embodying craftsmanship. According to claim 1,
The projection panel,
Converting light emitted from the condensing lens into pattern light corresponding to the tomographic image based on one of a micro-mirror method (DMD) and a direct irradiation method using a liquid crystal (LED).
3D printer embodying craftsmanship. According to claim 1,
The bat,
It includes a bottom portion formed of a release coating agent or a release material for transmitting the pattern light, a side portion surrounding the bottom portion, and a coupling portion detachably coupling the bottom portion to the side portion,
Is disposed on the inner bottom surface of the bat, a plurality of holes further comprises a glass plate formed of a mesh structure,
The side portion,
Fixing the glass plate and passing air to the glass plate side
3D printer embodying craftsmanship. The method of claim 5,
The build platform includes a build plate supporting an output object to be molded as the photo-curing resin is cured in the bat, and a lifting motor for elevating the build plate,
The processor,
Controlling the lifting motor to raise the build plate in one step by the layer height for the tomographic image
3D printer embodying craftsmanship. A 3D printer embodying the craftsmanship of claim 1; And
It includes a first server;
The 3D printer further includes a communication unit that transmits and receives data to and from the first server.
The processor,
Receiving 3D model drawing information for each of the art works registered in advance by the first server,
Control the projector and the build platform based on the received 3D model drawing information,
The first server,
Artifact information of the plurality of artisans satisfying a predetermined criterion is obtained from at least one of a second server and an external device, and 3D model drawing information for the art object is generated and generated based on the obtained artifact information. The 3D model drawing information is transmitted to the communication unit,
The first server,
Transmitting at least one of the art information and the 3D model drawing information to a user terminal,
The user terminal receives selection information for a specific art object to be output by the user through the 3D printer,
Determining the 3D model drawing information to be transmitted to the communication unit based on the received selection information
A 3D printing system that embodies craftsmanship.

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