KR101874791B1 - Method for photo-curable 3D laminated molding and apparatus for photo-curable 3D laminated molding - Google Patents

Method for photo-curable 3D laminated molding and apparatus for photo-curable 3D laminated molding Download PDF

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Publication number
KR101874791B1
KR101874791B1 KR1020167031313A KR20167031313A KR101874791B1 KR 101874791 B1 KR101874791 B1 KR 101874791B1 KR 1020167031313 A KR1020167031313 A KR 1020167031313A KR 20167031313 A KR20167031313 A KR 20167031313A KR 101874791 B1 KR101874791 B1 KR 101874791B1
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South Korea
Prior art keywords
molding
bottom plate
image light
plate
transparent bottom
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KR1020167031313A
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Korean (ko)
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KR20180033033A (en
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이병극
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주식회사 캐리마
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/20—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C67/00—Shaping techniques not covered by groups B29C39/00 - B29C65/00, B29C70/00 or B29C73/00
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/30—Auxiliary operations or equipment
    • B29C64/386—Data acquisition or data processing for additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y50/00—Data acquisition or data processing for additive manufacturing
    • B33Y50/02—Data acquisition or data processing for additive manufacturing for controlling or regulating additive manufacturing processes

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

Abstract

It is an object of the present invention to provide a photocurable 3D forming method and a photocurable 3D forming apparatus which can shorten the time for molding a molding. To this end, a photocurable 3D forming method for forming a molding by laminating a photocurable liquid resin contained in a resin tank having a transparent bottom plate according to the present invention to a molding plate is characterized in that the molding plate is raised And irradiates a continuous image light composed of a plurality of frames.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a photo-curing 3D forming method and a photo-

The present invention relates to a photocurable 3D forming method and a photocurable 3D forming apparatus.

The photocurable 3D molding apparatus has a resin tank having a transparent bottom plate and containing a liquid photo-curable resin which is cured through exposure to light, and a shaping plate capable of lifting the bottom plate within the resin tank. The molding plate is spaced apart from the bottom plate by the unit molding layer in the initial stage. In this state, when the image light is irradiated through the bottom plate, the resin between the molding plate and the bottom plate is cured. Then, the shaping plate is lifted up against the bottom plate so that the interval between the lower surface of the unit forming layer and the bottom plate previously stacked is separated by the thickness of the subsequent unit shaping layer, and the succeeding unit shaping layer is cured by projecting the subsequent image light .

In the conventional photocurable 3D forming apparatus, when the subsequent unit molding layer is formed, the molding plate is raised by a predetermined height so that the liquid resin between one unit molding layer and the bottom plate stacked in advance may be filled, The distance between the lower surface of the unit forming layer and the bottom plate was spaced by the thickness of the subsequent unit forming layer. Accordingly, the conventional photocurable 3D forming apparatus has consumed a considerable amount of time for continuous operation due to the rising and falling of the molding plate.

It is an object of the present invention to provide a photocurable 3D forming method and a photocurable 3D forming apparatus which can shorten the time for molding a molding.

An object of the present invention is to provide a photocurable 3D forming method for forming a molding by laminating a photocurable liquid resin accommodated in a resin tank having a transparent bottom plate to a molding plate so that the molding plate is maintained in a constant gap with the transparent bottom plate ; Exposing a continuous image light comprising a plurality of frames toward the transparent bottom plate; And elevating the shaping plate at an arbitrary speed relative to the transparent bottom plate while exposing the continuous image light; The liquid resin accommodated in the constant gap between the shaping plate and the transparent bottom plate adheres to the shaping plate in a partially cured state and the shaping plate rises in a state of being separated from the bottom plate, To 35 frames per second.

Here, the molding plate is raised with respect to the resin trough plate at a speed of 0.01 mm to 0.42 mm per second, so that the molding can stably be cured.

The rising speed of the shaping plate can be changed at least during the start and end of molding.

In addition, the continuous image light has a resolution of 3000 to 5000 dpi, which can stably cure the molding.

The continuous image light is plane image light in the form of a 4X2 to 12X8 matrix, and each plane image light preferably has a uniform light energy distribution in each plane.

It is an object of the present invention to provide a photocurable 3D forming apparatus for molding a molding, which is another aspect of the present invention, comprising: a resin tank for containing a photocurable liquid resin with a transparent bottom plate; A shaping plate having a lower surface parallel to the bottom plate and capable of ascending and descending in the resin tank; An elevation driving unit for elevating and lowering at least one of the resin tank and the shaping plate; A light irradiating unit for irradiating continuous image light composed of a plurality of frames continuous from the bottom of the resin tank toward the bottom plate; And a control unit controlling the elevation driving unit so that the shaping plate elevates with respect to the resin trough while irradiating the continuous image light, wherein the control unit controls the elevation driving unit so that the shaping plate is moved in the predetermined gap between the parallel bottom surface of the shaping plate and the transparent bottom plate The control unit controls the shaping plate to rise in a state where the liquid resin is adhered to the shaping plate in a partially cured state and separated from the bottom plate and the control unit controls the continuous image light to be formed in 1 to 35 frames per second And the light control unit is controlled by the control unit.

Here, the control unit can stably cure the molding product by controlling the elevation driving unit such that the molding plate lifts up the resin trough plate at a rate of 0.01 mm to 0.42 mm per second.

The control unit controls the elevation driving unit so that the elevating speed of the shaping plate is changed at least during the start and end of molding, thereby more stably curing the molding.

On the other hand, the continuous image light has a resolution of 3000 to 5000 dpi, which can stably cure the molding.

The continuous image light is plane image light in the form of a 4X2 to 12X8 matrix, and each plane image light preferably has a uniform light energy distribution in each plane.

The photocurable 3D forming method and the photocurable 3D forming apparatus according to the present invention can shorten the time for molding the molding.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual view showing a photo-curing type 3D forming apparatus according to the present invention. FIG.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a conceptual view showing a photo-curing type 3D forming apparatus according to the present invention. FIG. As shown in FIG. 1, the photocurable 3D forming apparatus according to the present invention has a resin tank 200 having a transparent bottom plate 210 and containing a photocurable liquid resin (P). The resin tanks 200 are supported on the frame 100. The frame 100 supports the edge region of the bottom plate 210 of the resin tank 200.

The photo-curable liquid resin (P) includes a polymerization initiator and a polymerization inhibitor. When the photo-curable liquid resin is irradiated with light, the polymerization initiator is decomposed to generate radicals. The radicals generated by the polymerization initiator initially react with dissolved oxygen and polymerization inhibitor. When both the dissolved oxygen and the polymerization inhibitor are consumed by the radical, the radical reacts with the photo-curable liquid resin to cause polymerization and cure the liquid resin. The addition amount of the polymerization initiator and the heavy inhibitor may be varied depending on the molding method. Here, the radical initiator is referred to as a reaction initiator until the radical reacts with the photo-curable liquid resin to cause polymerization. The release agent may be added to the liquid resin (P).

The photocurable 3D forming apparatus includes a light irradiating unit 300 for irradiating continuous image light composed of a plurality of consecutive frames from the bottom of the resin tank 200 toward the bottom plate 210. The light irradiation unit 300 emits light necessary for curing the photo-curable liquid resin (P). The light irradiation unit 300 may employ at least one of all display devices capable of emitting light such as an LCD, an LED, a DMD, and the like.

Here, the continuous image light is composed of 1 to 35 frames per second, more preferably 30 frames per second.

The continuous image light may have a 3000 to 5000 dpi resolution grayscale processed in a 4X2 to 12X8 matrix.

The continuous image light is LED light, and the wavelength is 360 nm to 405 nm.

The technology of dealing with microfluidics has been widely applied to regenerative medicine, diagnostic medicine, and biotechnology.

The core of microfluidic technology is high-resolution work at a level of 1.0 micron.

Implementation of a resolution of 5000 dpi (which means 5000 pixels per inch, that is, a minimum light source size of 0.5 microns per pixel) can replace high cost and labor photolithography.

The present invention realizes light-curing 3D printing as a 3000 to 5000 dpi LED exposure system, thereby improving productivity and securing a low-cost production technology.

The photocurable 3D forming apparatus has a shaping plate 500 having a lower surface parallel to the bottom plate 210 of the resin tank 200 and capable of ascending and descending in the resin tank 200. The photocurable 3D forming apparatus includes a lifting and driving unit 400 for lifting and driving at least one of the resin tank 200 and the shaping plate 500. Here, the elevation driving unit 400 drives the shaping plate 500 to move up and down. The lifting and lowering drive unit 400 includes an elevator 410 installed in the frame 100, a lifting arm 430 extending from the lifting unit 410 to the resin tank 200, a lifting arm 430, (450) for interconnecting the two. The mediating part 450 adjusts the shaping plate 500 so as to be in parallel with the bottom plate 210, and prevents the vibrations generated during the lifting and moving. The lifting and lowering drive unit 400 may be connected to the resin tank 200 and designed and deformed so that the resin tank 200 can be elevated with respect to the molding plate 500.

The photocurable 3D forming apparatus includes a control unit for controlling the lift driving unit 400 so that the shaping plate 500 is raised with respect to the bottom plate 210 while the irradiation unit 300 irradiates the continuous image light. The control unit controls the elevation driving unit 400 so that the shaping plate 500 ascends with respect to the bottom plate 210 at a speed of 0.01 mm to 0.42 mm per second, more preferably 0.13 mm per second.

The rising speed of the shaping plate 500 can be changed during molding. Particularly, when the shape is thin and weak, the speed can be slowed down, the area can be wide, and the stable part can speed up.

Here, the control unit controls the elevation driving unit 400 so that the molding plate 500 is raised by 4 to 5 占 퐉 while one frame of the plurality of frames constituting the continuous image light is irradiated.

The liquid resin accommodated in the gap between the shaping plate and the resin tray bottom plate is adhered to the shaping plate in a partially cured state before full curing, In a separate state.

Therefore, the partly cured resin is completely cured while the shaping plate rises.

The photocurable 3D forming apparatus includes a heat transfer unit 350 for thermally connecting the light irradiation unit 300 and the resin tank 200 to raise the temperature of the liquid resin P accommodated in the resin tank 200. The heat transfer unit 350 is in contact with the light irradiation unit 300 and the resin tank 200 to transfer heat generated in the light irradiation unit 300 or another heating device to the resin tank 200. Accordingly, the liquid resin (P) may have a low viscosity. If the viscosity of the liquid resin p is low, penetration into the space between the molding plate 500 and the bottom plate 210 becomes easy. The resin tank 200 may further include a separate heating device.

With the photo-curable 3D molding apparatus having such a structure, a 3D molding is formed according to the following procedure.

First, a photocurable liquid resin P is injected into the resin tank 200. The control unit controls the elevation driving unit 400 such that the distance between the molding plate 500 and the bottom plate 210 is at least a part of a single unit molding layer.

Next, the control unit controls the light irradiation unit 300 to irradiate the continuous image light composed of a plurality of consecutive frames toward the bottom plate 210, and at the same time, controls the light irradiation unit 300 so that the molding plate 500 ascends with respect to the bottom plate 210, (400).

Here, the continuous image light is preferably 3000 to 5000 dpi resolution grayscale-processed with a matrix of 4X2 to 12X8.

In particular, the continuous image light is a planar image light, and each plane constitutes a matrix-like plane of 4X2 to 12X8. And control the uniform distribution of the volume distribution of each plane element through the gray scale plane light.

It is also possible to control the light amount distribution to be uniform even in a manner that deviates with respect to the exposure time for each sector of the plane light.

At this time, the continuous image light is composed of 1 to 35 frames per second, more preferably 30 frames per second, and the molding plate 500 is provided with the bottom plate 210 so as to be 0.01 mm to 0.42 mm, more preferably 0.13 mm per second. Lt; / RTI >

The rising speed of the shaping plate 500 can be changed during molding. Particularly, when the shape is thin and weak, the speed can be slowed down, the area can be wide, and the stable part can speed up.

The liquid resin accommodated in the gap between the shaping plate and the resin trough bottom plate is adhered to the shaping plate 500 in a partially cured state before being fully cured when the shaping plate 500 is lifted from the resin trough transparent bottom plate 210 And goes up to the separated state in the bottom plate 210.

Therefore, the partly cured resin is completely cured while the molding plate 500 is lifted.

More specifically, the control unit controls the elevation driving unit 400 so that the molding plate 500 is raised by 4 to 5 μm while one frame of the plurality of frames constituting the continuous image light is irradiated.

A liquid release agent having a different specific gravity may be used for releasing the partially cured resin from the resin tray bottom plate 210. Liquid release agents with different specific gravity do not cure in response to continuous image light.

On the other hand, when the image light is exposed, the boundary region and the inner region are separated from each other and exposed with a time difference, so that they can be easily attached to the molding plate and easily molded in the resin base plate.

The image light attached to the molding plate when the image light is exposed is not derived from the 3D shape data for molding the object but may be a shape arbitrarily generated for attaching the molding object to the molding plate.

Once the initial partially cured molding layer is attached to the molding plate and securely released from the resin bottom plate, the subsequent process is more stable than the initial molding.

A liquid infiltration groove is formed on the lower surface of the shaping plate 500, which is opposite to the bottom plate, used in the present invention so that liquid resin can easily permeate. The grooves facilitate the penetration of the liquid resin when the lower surface of the molding plate 500 is in contact with the transparent bottom plate 210 of the resin tank or when a certain gap is formed.

INDUSTRIAL APPLICABILITY The present invention relates to a photocurable 3D printer, and is industrially applicable.

Claims (10)

A photocurable 3D molding method for molding a molding by laminating a photocurable liquid resin contained in a resin tank having a transparent bottom plate to a molding plate,
Receiving a liquid release agent different in specific gravity from the photo-curable liquid resin in the resin tank;
Positioning the shaping plate while maintaining a constant gap with the transparent bottom plate;
Exposing a continuous image light comprising a plurality of frames toward the transparent bottom plate; And
Elevating the shaping plate at an arbitrary speed relative to the transparent bottom plate while exposing the continuous image light;
The photocurable liquid resin accommodated in the constant gap between the shaping plate and the transparent bottom plate is adhered to the shaping plate in a partially cured state and the shaping plate rises in a state in which it is separated from the transparent bottom plate,
Wherein the continuous image light comprises 1 to 35 frames per second. The method according to claim 1,
Wherein the rising speed of the shaping plate rises with respect to the transparent bottom plate at a rate of 0.01 mm to 0.42 mm per second. 3. The method of claim 2,
Wherein the rising speed of the shaping plate changes the rising speed during the start and end of molding. 4. The method according to any one of claims 1 to 3,
Wherein the continuous image light has a resolution of 3000 to 5000 dpi. 5. The method of claim 4,
Wherein the continuous image light is planar image light in the form of a 4X2 to 12X8 matrix, and each plane image light has a uniform light energy distribution for each position of each plane. 1. A photocurable 3D molding apparatus for molding a molding,
A resin reservoir having a transparent bottom plate and containing a photo-curable liquid resin and a liquid release agent different in specific gravity from the photo-curable liquid resin;
A shaping plate having a lower surface parallel to the transparent bottom plate and capable of ascending and descending in the resin tank;
An elevation driving unit for elevating and lowering at least one of the resin tank and the shaping plate;
A light irradiating unit for irradiating continuous image light composed of a plurality of frames continuous from the bottom of the resin tank toward the transparent bottom plate;
And a control unit controlling the elevation driving unit such that the shaping plate is raised with respect to the transparent bottom plate while irradiating the continuous image light,
The liquid resin accommodated in a predetermined gap between the parallel bottom surface of the shaping plate and the transparent bottom plate is adhered to the shaping plate in a partially cured state and separated from the transparent bottom plate, Respectively,
Wherein the control unit controls the light irradiation unit so that the continuous image light is composed of 1 to 35 frames per second. The method according to claim 6,
Wherein the control unit controls the elevation driving unit so that the shaping plate rises relative to the transparent bottom plate at a speed of 0.01 mm to 0.42 mm per second. 8. The method of claim 7,
Wherein the control unit controls the elevation driving unit so that the elevation speed of the shaping plate changes during the start and end of molding. 9. The method according to any one of claims 6 to 8,
Wherein the continuous image light has a resolution of 3000 to 5000 dpi. 10. The method of claim 9,
Wherein the continuous continuous image light is planar image light in the form of a 4X2 to 12X8 matrix, and each plane image light has a uniform light energy distribution for each position of each plane.
KR1020167031313A 2015-09-22 2016-09-22 Method for photo-curable 3D laminated molding and apparatus for photo-curable 3D laminated molding KR101874791B1 (en)

Applications Claiming Priority (2)

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KR20150133670 2015-09-22
PCT/KR2016/010599 WO2017052237A1 (en) 2015-09-22 2016-09-22 Photocurable 3d forming method and photocurable 3d forming apparatus

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KR102367742B1 (en) * 2019-12-10 2022-02-25 (주)캐리마 Light source Device of line shape and 3D Printer comprising the same

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JP2004122501A (en) * 2002-09-30 2004-04-22 Fuji Photo Film Co Ltd Optical shaping method

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US7088432B2 (en) * 2000-09-27 2006-08-08 The Regents Of The University Of California Dynamic mask projection stereo micro lithography
EP2052693B2 (en) * 2007-10-26 2021-02-17 Envisiontec GmbH Process and freeform fabrication system for producing a three-dimensional object
IT1403482B1 (en) * 2011-01-18 2013-10-17 Dws Srl METHOD FOR THE PRODUCTION OF A THREE-DIMENSIONAL OBJECT AND A STEREOLITHOGRAPHIC MACHINE USING THIS METHOD
ITVI20110333A1 (en) * 2011-12-23 2013-06-24 Ettore Maurizio Costabeber STEREOLITHOGRAPHIC MACHINE WITH PERFECT OPTICAL GROUP
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