KR20240088624A - 3d printing device - Google Patents

Abstract

A 3D printing device for producing 3D printed objects is disclosed. The 3D printing device has a molding surface on which the 3D output is output and a molding plate provided with a plurality of perforations, a light source unit that irradiates light to the molding surface, and a plurality of protrusions provided to pass through the plurality of holes, and the molding surface is provided. A print removal device that is provided on the opposite side of the modeling surface of the plate and causes the 3D output printed on the modeling surface to be separated from the modeling surface as the protrusion is inserted into a hole in the modeling plate by relative movement toward the modeling plate. Includes units.

Description

3D printing device {3D PRINTING DEVICE}

The present invention relates to a 3D printing device for producing 3D output.

The continuous lamination type 3D printing device has a resin tank that has a transparent bottom plate and holds a photocurable liquid resin that is hardened through exposure to light, and a molding plate that can be raised and lowered relative to the bottom plate inside the resin tank. In the initial stage, the molding plate is spaced apart from the base plate by the unit molding layer. In this state, when image light is irradiated through the bottom plate, the resin between the molding plate and the bottom plate is hardened. Then, the molding plate is lifted again with respect to the bottom plate so that the gap between the lower surface of the pre-laminated unit molding layer and the bottom plate is equal to the thickness of the subsequent unit molding layer, and the subsequent unit molding layer is projected and cured by projecting the image light. This is formed.

Conventional 3D printing devices print a large number of prints or large prints on a single large plate for output productivity and separate the prints from the plate. However, since the printout is firmly coupled to the plate, if it is separated using a sharp blade, the printout or plate may be damaged, and if the printout is carefully separated, it takes a lot of separation time.

The purpose of the present invention is to provide a 3D printing device that can safely separate 3D output from the molding plate at high speed.

A 3D printing device for producing 3D output to achieve the above-mentioned tasks is provided. The 3D printing device has a molding surface on which the 3D output is output and a molding plate provided with a plurality of perforations, a light source unit that irradiates light to the molding surface, and a plurality of protrusions provided to pass through the plurality of holes, and the molding surface is provided. A print removal device that is provided on the opposite side of the modeling surface of the plate and causes the 3D output printed on the modeling surface to be separated from the modeling surface as the protrusion is inserted into a hole in the modeling plate by relative movement toward the modeling plate. Includes units.

The molding plate may be moved toward the output removal unit so that the protrusion may be inserted into the hole of the molding plate.

The 3D printing device may further include a blade module for flattening the photocurable resin on the modeling surface. The molding plate is moved upward from the output removal unit to be positioned on the operating area of the blade module, and the blade module is moved in one direction on the molding surface to push the separated 3D output from the molding surface. As a result, the separated 3D printed object can be easily removed from the modeling surface using the flattening blade module.

The blade module may include a resin flattening unit that flattens the photo-curable resin and a print push unit that pushes the 3D output. As a result, the separated 3D printed object can be easily removed from the modeling surface using the flattening blade module.

The resin flattening part may be made of a softer material than the output push part. Thereby, damage to the soft resin leveling portion can be prevented.

The protrusions of the output removal unit may be inserted into the perforations of the molding plate at intervals for each region. As a result, the protrusion of the output removal unit can be easily inserted into the hole of the molding plate.

The protrusions of the output removal unit may be inserted into the perforations of the molding plate at intervals for each region. As a result, the 3D printed object can be easily separated as the protrusions are inserted into the perforations using force concentrated in each area of the molding plate and distributed over time.

The 3D printing device according to an embodiment of the present invention can conveniently and easily separate the 3D output on the molding plate by inserting the protrusion of the output removal unit into the perforation of the molding plate.

1 is a diagram showing a 3D printing device according to an embodiment of the present invention.
Figure 2 is a diagram showing the molding plate of Figure 1.
FIG. 3 is a diagram showing the molding plate, output removal unit, and blade module of FIG. 1.
Figures 4 to 7 are diagrams showing a method of separating the 3D output from the molding plate by the 3D printing device of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numbers or symbols refer to components that perform substantially the same function, and the size of each component in the drawings may be exaggerated for clarity and convenience of explanation. However, the technical idea of the present invention and its core configuration and operation are not limited to the configuration or operation described in the examples below. In describing the present invention, if it is determined that a detailed description of a known technology or configuration related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

FIG. 1 is a schematic illustration of a 3D printing device 1 according to an embodiment of the present invention, FIG. 2 is a diagram showing the modeling plate 31 of FIG. 1, and FIG. 3 is a diagram showing the modeling plate 31 of FIG. 1. This is a diagram showing the output removal unit 50 and the blade module 60.

The embodiment of the present invention is described based on the 3D printing device 1 of the downward DLP (Digital Light Processing) method in which the molding plate 30 descends and stacks within the resin tank 20, as shown in FIG. 1. It can also be applied to 3D printing devices of the upward DLP method, FDM (Fused Deposition Modeling), SLA (Stereolithography) method, and SLA (Selective Laser Sintering) method in which the molding plate 30 rises and stacks. Hereinafter, an embodiment of the downward DLP method 3D printing device 1 of the present invention will be described in a non-limiting resin tank method.

Referring to Figure 1, the 3D printing device 1 includes a bed 10, a resin tank 20, a molding plate unit 30, a light source unit 40, an output removal unit 50, a blade module 60, and Includes a control unit 70.

The bed 10 is spaced apart from the floor by a support pillar supporting the floor. The bed 10 may support or house the resin tank 20, the molding plate unit 30, the light source unit 40, the output removal unit 50, the blade module 60, and the control unit 70.

The resin tank 20 is shaped like a tank with an open top, and a photocurable resin can be stored therein.

The molding plate unit 30 includes a plate-shaped molding plate 31 supported on the bed 10 and a lifting and lowering module (not shown) that raises and lowers the molding plate 31. The modeling plate 31 includes a modeling surface formed by stacking at least one output.

As shown in FIG. 2, the molding plate 31 may have a plurality of perforations 32 formed to firmly support the molded product on the molding surface. The perforations 32 penetrate the molding plate 31.

The molding plate 31 is located at a position lowered by the thickness of the unit molding layer from the top (water level surface) of the photocurable resin stored in the resin tank 20. Accordingly, the photocurable resin may be disposed on the molding surface of the molding plate 31 to a thickness corresponding to the unit molding layer.

A 3D output can be directly layered and printed on the molding surface of the molding plate 31. Of course, 3D output can also be layered and molded on an object supporter.

The light source unit 40 irradiates UV light on the molding surface to cure the photocurable resin and mold the unit molding layer. The light source unit 40 has a lamp 41, an output filter 42, an arm 43, and a light source support portion 45.

The lamp 41 outputs ultraviolet rays (UV light) to cure the photocurable resin on the modeling surface.

The output filter 42 is formed to output the curing wavelength only to the exposure area of the 3D modeling information. The output filter 42 can irradiate UV light to the molding plate 31 based on a pattern image (slice image) corresponding to the unit molding layer of the 3D printed product.

The arm 43 is horizontally coupled from the light source support portion 45 and supports the lamp 41. The arm 43 causes the lamp 41 to move up and down.

The light source support portion 45 is supported on the bed 10, and the arm 43 is coupled thereto.

The light source unit 40 may further include a light source driver (not shown) that drives the lamp 41 to move up and down.

The light source unit 40 is not limited to the structure described above, and may be made of, for example, an LED surface light source and/or an LED line light source, or may be made of a projector, lens, and mirror.

The output removal unit 50 may be provided at the lower part of the molding plate 31, as shown in FIG. 3. The output removal unit 50 includes a plurality of protrusions 52 inserted into the perforations 32 at positions corresponding to the perforations 32 of the molding plate 31 and a protrusion support portion 54 supporting the plurality of protrusions 52. Includes. The plurality of protrusions 52 have a height that is at least equal to or greater than the thickness of the molding plate 31.

As the protrusion 52 of the output removal unit 50 is inserted into the perforation 32 on the side opposite to the molding surface of the molding plate 31, the 3D output printed on the molding surface is inserted into the hole 32 of the molding plate 31. ) can be quickly and easily separated from the molding surface without damaging the 3D printed object and the molding plate 31 by the protrusion 52 inserted into the molding plate 31.

As a modified example, the output removal unit 50 may be provided with protrusions 52 at an inclined height. When the plurality of protrusions 52 have inclined heights, when the molding plate 31 is lowered, the projections 52 at a high position are first inserted into the perforations 32 of the molding plate 31. As a result, as the protrusions 52 of the output removal unit 50 are inserted into the perforations 32 of the molding plate 31 at intervals for each region, force distributed over time for each region of the molding plate 31 is applied. 3D prints can be easily separated.

The blade module 60 includes a resin flattening unit 62 on one side and an output push unit 63 on the other side. The blade module 60 can be horizontally moved in one direction along the molding surface at a position spaced above the molding surface of the molding plate 31 by the thickness of the unit molding layer. Additionally, the blade module 60 can rotate based on the hinge axis between the resin flattening unit 62 and the output push unit 63.

The resin flattening portion 62 may be implemented with an elastic material, for example, rubber. The resin flattening portion 62 extends long to flatten the photocurable resin on the molding surface when the blade module 60 is horizontally moved in one direction along the molding surface.

The output push unit 63 may be made of a material with higher hardness than the resin flattening unit 62, such as metal or plastic. The output push unit 63 extends long enough to push the separated 3D printed object on the molding surface in one direction when the blade module 60 is horizontally moved in one direction along the molding surface. The output push unit 63 may be provided with guides 64 protruding in one direction on both sides. The guide 64 can prevent the 3D printed object being pushed out from deviating from one direction.

As a modified example, the blade module may include only a resin flattening portion. At this time, the output push unit is provided separately from the blade module and can operate to push the 3D output object from the modeling surface.

The control unit 70 can control each component of the 3D printing device 1.

The control unit 70 can perform 3D modeling of a 3D printed object by executing a 3D molding engine stored in memory (not shown). For example, the control unit 70 may sequentially stack a plurality of unit molding layers corresponding to a plurality of slice images obtained by dividing the three-dimensional image of the 3D output into a plurality of slices along the stacking direction on the molding plate 31.

The control unit 70 controls the molding plate unit 30 to raise and lower the molding plate 31, and controls the blade module 60 to move horizontally in one direction along the molding surface and rotate about the hinge axis.

The control unit 70 includes at least one general-purpose processor that loads at least a part of the control program from a non-volatile memory in which the control program is installed to a volatile memory and executes the loaded control program, for example, a CPU (Central Processing) Unit), application processor (AP), or microprocessor.

The control unit 70 may include single core, dual core, triple core, quad core, and multiple cores thereof. A plurality of control units 70 may be provided. The control unit 70 may include, for example, a main processor and a sub processor that operates in a sleep mode (eg, a mode in which only standby power is supplied). Additionally, the processor, ROM, and RAM are interconnected through an internal bus.

The control unit 70 can be implemented as included in the main SoC (Main SoC) mounted on a PCB built into the 3D printing device 1. In another embodiment, the main SoC may further include an image processing unit.

The control program may include program(s) implemented in the form of at least one of BIOS, device driver, operating system, firmware, platform, and application program (application). The application program may be pre-installed or stored at the time of manufacturing the 3D printing device 1, or may be installed based on the received data by receiving application data from an external source during future use. Data of the application program may be downloaded to the 3D printing device 1 from an external server, for example, an application market. Such an external server is an example of a computer program product, but is not limited thereto.

Hereinafter, with reference to FIGS. 3 to 7, a method of separating a 3D output from a molding plate by a 3D printing device according to an embodiment of the present invention will be described.

In Figure 3, the 3D output is completed as the molding plate 31 is sequentially lowered. An output removal unit 50 is provided on the lower side of the molding plate 31. At this time, the perforations 32 of the molding plate 31 and the protrusions 52 of the output removal unit 50 are aligned vertically.

In FIG. 4, as the molding plate 31 further descends, the protrusion 52 of the output removal unit 50 is inserted into the perforation 32 of the molding plate 31, and the 3D printed object is placed on the molding surface of the molding plate 31. is separated from

In FIG. 5, the molding plate 31 rises to the lower side of the resin flattening portion 62. At this time, the 3D output on the modeling surface is in a separated state, and the perforation 32 of the modeling plate 31 is separated from the projection 52 of the output removal unit 50.

In Figure 6, the blade module 50 rotates, for example, 180 degrees about the hinge axis, so that the resin flattening unit 62 and the output push unit 63 are mutually switched.

In Figure 7, as the blade module 50 moves horizontally in one direction along the modeling surface, the output push unit 63 pushes the 3D output on the modeling surface to an external output box (not shown).

As described above, the 3D printing device 1 according to an embodiment of the present invention places the 3D output on the molding plate 31 through the protrusion 52 of the output removal unit 50 through the perforation of the molding plate 31. 32), it can be conveniently and easily separated, and the 3D output can be pushed out from the modeling surface using the output push unit 63 of the blade module 60.

As a modified example, a heat-melt resin film is attached to the molding surface of the molding plate, and after the 3D print is printed on the heat-melt resin film, the molding plate can be heated to melt the heat-melt resin film to separate the 3D print. there is.

In the above, preferred embodiments of the present invention have been shown and described, but the present invention is not limited to the specific embodiments described above, and may be used in the technical field to which the invention pertains without departing from the gist of the invention as claimed in the claims. Of course, various modifications can be made by those skilled in the art, and these modifications should not be understood individually from the technical idea or perspective of the present invention.

1: 3D printing device
10: Bed
20: Sujijo
30: Forming plate unit
31: Printing plate
32: perforated
40: Light source unit
50: Output removal unit
52: protrusion
54: Protrusion support
60: Blade module
62: Resin leveling unit
63: Output push unit
64: Guide
70: control unit

Claims (7)

In a 3D printing device that produces 3D output,
A molding plate having a molding surface on which the 3D output is output and provided with a plurality of perforations:
a light source unit that irradiates light to the modeling surface; and
It has a plurality of protrusions provided to pass through the plurality of holes, and is provided on the opposite side of the molding surface of the molding plate, and as the protrusions are inserted into the holes of the molding plate by relative movement toward the molding plate, the molding surface A 3D printing device including a output removal unit that separates the 3D output from the modeling surface. According to paragraph 1,
A 3D printing device in which the molding plate is moved toward the output removal unit and the protrusion is inserted into a hole in the molding plate. According to paragraph 1,
It further includes a blade module for flattening the photocurable resin on the molding surface,
The molding plate is moved upward from the output removal unit to be positioned on the operating area of the blade module,
The blade module is a 3D printing device that moves in one direction on the modeling surface to push the separated 3D output from the modeling surface. According to paragraph 3,
The blade module is a 3D printing device including a resin flattening unit that flattens the photo-curable resin and a print push unit that pushes the 3D output. According to clause 4,
A 3D printing device in which the resin flattening unit is made of a softer material than the output push unit. According to paragraph 1,
A 3D printing device in which the protrusions of the output removal unit are inserted into the perforations of the molding plate at intervals for each region. According to clause 6,
A 3D printing device in which the protrusions of the output removal unit are inserted into the perforations of the molding plate at intervals for each region.

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