WO2024010135A1 - Dispositif de post-durcissement de produit imprimé en 3d - Google Patents

Dispositif de post-durcissement de produit imprimé en 3d Download PDF

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Publication number
WO2024010135A1
WO2024010135A1 PCT/KR2022/013188 KR2022013188W WO2024010135A1 WO 2024010135 A1 WO2024010135 A1 WO 2024010135A1 KR 2022013188 W KR2022013188 W KR 2022013188W WO 2024010135 A1 WO2024010135 A1 WO 2024010135A1
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unit
curing
post
led
present
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PCT/KR2022/013188
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English (en)
Korean (ko)
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심운섭
김원경
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주식회사 그래피
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • 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
    • B29C64/227—Driving means
    • B29C64/241—Driving means for rotary motion
    • 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
    • B29C64/245—Platforms or substrates
    • 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
    • B29C64/264—Arrangements for irradiation
    • 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
    • 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
    • B29C64/364—Conditioning of environment
    • B29C64/371—Conditioning of environment using an environment other than air, e.g. inert gas
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y10/00—Processes of additive manufacturing
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y30/00—Apparatus for additive manufacturing; Details thereof or accessories therefor
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B33—ADDITIVE MANUFACTURING TECHNOLOGY
    • B33Y—ADDITIVE MANUFACTURING, i.e. MANUFACTURING OF THREE-DIMENSIONAL [3-D] OBJECTS BY ADDITIVE DEPOSITION, ADDITIVE AGGLOMERATION OR ADDITIVE LAYERING, e.g. BY 3-D PRINTING, STEREOLITHOGRAPHY OR SELECTIVE LASER SINTERING
    • B33Y40/00—Auxiliary operations or equipment, e.g. for material handling
    • B33Y40/20—Post-treatment, e.g. curing, coating or polishing
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/106—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material
    • B29C64/124—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified
    • B29C64/129—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask
    • B29C64/135—Processes of additive manufacturing using only liquids or viscous materials, e.g. depositing a continuous bead of viscous material using layers of liquid which are selectively solidified characterised by the energy source therefor, e.g. by global irradiation combined with a mask the energy source being concentrated, e.g. scanning lasers or focused light sources
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C64/00—Additive manufacturing, i.e. manufacturing of three-dimensional [3D] objects by additive deposition, additive agglomeration or additive layering, e.g. by 3D printing, stereolithography or selective laser sintering
    • B29C64/10—Processes of additive manufacturing
    • B29C64/141—Processes of additive manufacturing using only solid materials
    • B29C64/147—Processes of additive manufacturing using only solid materials using sheet material, e.g. laminated object manufacturing [LOM] or laminating sheet material precut to local cross sections of the 3D object

Definitions

  • the present invention relates to a device for post-curing 3D printed materials. More specifically, it provides a nitrogen environment that minimizes oxygen by supplying nitrogen into the device during the post-curing process, thereby increasing the strength of the 3D printed material that has undergone post-curing.
  • We want to improve the physical properties such as:
  • 3D printers have recently emerged that produce molded products with a three-dimensional shape using a computer that stores 3D design drawing data designed by a product designer or designer through a three-dimensional modeling tool.
  • Using the 3D printer has the advantage that manufacturing costs and manufacturing times can be significantly reduced, personalized manufacturing is possible, and complex three-dimensional shapes can be easily manufactured.
  • the above-mentioned 3D printer uses the SLA (Stereo Lithography Apparatus) method, which injects a laser into the photocurable resin to harden the scanned area, and the DLP (Digital Light Processing) method, which irradiates light to the lower part of the reservoir where the photocurable resin is stored and hardens it.
  • LCD method which uses a UV light source and an LCD panel to laminate resin molded products on the top of the build plate
  • SLS Selective Laser Sintering
  • FDM which molds by extruding molten resin.
  • Fused Deposition Modeling Fused Deposition Modeling
  • DMT Laser-aid Direct Metal Tooling
  • LOM Laminated Object Manufacturing
  • the size of the output may be deformed or the strength may be lowered.
  • a post-curing machine is used to solve the above problems, but there is a problem in that curing efficiency is reduced due to the oxygen concentration in the post-curing machine.
  • the present invention relates to a device for post-curing 3D printed materials. More specifically, it provides a nitrogen environment that minimizes oxygen by supplying nitrogen into the device during the post-curing process, thereby increasing the strength of the 3D printed material that has undergone post-curing.
  • We want to improve the physical properties such as:
  • An apparatus for post-curing a 3D printed object includes a case portion; A loading part located inside the case part where a 3D printed object is placed; An LED unit surrounding the loading unit and irradiating UV-LED; and a nitrogen supply unit that supplies nitrogen between the loading unit and the LED unit, wherein the LED unit includes a first LED unit positioned on an upper portion of the loading unit, wherein the first LED unit includes a first element at the center and It includes a second element and a third element sequentially spaced apart from the first element at a predetermined distance.
  • the second and third elements of the device for post-curing 3D printed objects according to the present invention are formed in plural numbers, and the plurality of second and third elements are centered around the first element, respectively, in a circumferential direction. are spaced apart at a predetermined interval.
  • the LED unit of the device for post-curing a 3D printed object includes a second LED unit located on a side of the loading unit.
  • the second LED unit of the device for post-curing 3D printed material according to the present invention is provided as a pair and is located on both sides of the loading unit.
  • the loading part of the device for post-curing the 3D printed object includes a circular tray part on which the 3D printed object is placed; and a rotator part coupled to a lower part of the center of the circular tray part and extending in a vertical direction, wherein the circular tray part rotates due to rotation of the rotator part.
  • the device for post-curing a 3D printed object according to the present invention further includes a heat sink unit that generates heat generated from the LED unit.
  • the device for post-curing a 3D printed object according to the present invention further includes a cooler unit that generates heat generated from the LED unit.
  • the device for post-curing a 3D printed object according to the present invention further includes a UV detection sensor that detects the amount of UV-LED generated from the LED unit.
  • a structure is formed in which the cage part surrounds the loading part where the 3D printed object is located, and nitrogen is directly transported into the cage part through the connection unit to minimize oxygen within the cage part and maximize nitrogen.
  • the post-curing results of the 3D printed product for example, improvement of physical properties such as strength
  • the post-curing results of the 3D printed product can be excellent.
  • Figure 1 is a perspective view of a device for post-curing a 3D printed object according to the present invention.
  • Figure 2 is a cross-sectional view of the inside of the curing unit of the device for post-curing 3D printed objects according to the present invention.
  • Figure 3 is an enlarged view of the vicinity of the cage portion of the curing unit of the device for post-curing 3D printed materials according to the present invention.
  • Figure 4 shows the back of the device for post-curing 3D printed objects according to the present invention.
  • Figure 5 shows the front of a device for post-curing 3D printed objects according to the present invention.
  • Figure 6 shows a side view of a device for post-curing a 3D printed object according to the present invention.
  • Figure 7 is an exploded and enlarged view of the vicinity of the cage portion of the curing unit of the device for post-curing 3D printed materials according to the present invention.
  • Figure 8 is an exploded, enlarged view from the back of the vicinity of the cage portion of the curing unit of the device for post-curing 3D printed materials according to the present invention.
  • Figure 9 shows a summary of the arrangement of the first to third elements of the first LED part of the device for post-curing 3D printed objects according to the present invention.
  • Figure 10 is a graph showing the amount of energy applied to the circular tray on which the 3D printed object according to the present invention is placed when UV-LED is irradiated from a conventional LED with an irregular arrangement of elements.
  • Figure 11 is a graph showing the amount of energy applied to the circular tray portion according to the first embodiment of the present invention.
  • Figure 12 is a graph showing the amount of energy applied to the circular tray portion according to the second embodiment of the present invention.
  • Figure 13 is an actual photo of a 3D printed product completed using a conventional post-curing method.
  • Figure 14 is an actual photo of a 3D printed product completed by the post-curing method according to the present invention.
  • Figure 1 is a perspective view of a device for post-curing a 3D printed object according to the present invention.
  • the device for post-curing a 3D printed object according to the present invention includes a curing unit 100, a nitrogen generating unit 200, and a connecting unit 300.
  • Nitrogen generated in the nitrogen generating unit 200 is supplied to the curing unit 100 through the connecting unit 300.
  • the nitrogen generation unit 200 for example, generates nitrogen by separating nitrogen molecules of compressed air from other molecules, and is not limited to any type of nitrogen generating device.
  • the nitrogen generating unit 200 is preferably located on the upper part of the curing unit 100. As shown in FIG. 1, the nitrogen generating unit 200 and the curing unit 100 are tubes protruding to the outside. It is connected through a connection unit 300 of the form.
  • Figure 2 is an internal cross-sectional view of the curing unit of the device for post-curing 3D printed materials according to the present invention
  • Figure 3 is an enlarged view of the vicinity of the cage portion of the curing unit of the device for post-curing 3D printed materials according to the present invention.
  • 6 shows the side of the device for post-curing 3D printed materials according to the present invention
  • Figure 7 is an exploded and enlarged view of the vicinity of the cage portion of the curing unit of the device for post-curing 3D printed materials according to the present invention. It is shown.
  • the curing unit 100 includes a case portion 101, a cage portion 110, a loading portion 120, an LED portion 130, a heat sink portion 140, and a cooler portion 150.
  • the case portion 101 is preferably, for example, in the shape of a hexahedron with a hollow portion formed, and the front is preferably open so that the door portion 105, which will be described later, is coupled thereto.
  • a plurality of penetrating upper holes 102 are formed on both sides of the upper part of the case part 101, and a plurality of penetrating lower holes 103 are formed on both sides of the lower part of the case part 101. This serves to radiate heat generated from the LED unit 130, which will be described later, to the outside of the case unit 101. At this time, the heat dissipation effect is maximized due to the formation of the upper hole 102 and the lower hole 103, which will be described in detail later.
  • the cage portion 110 is located inside the case portion 101.
  • the cage portion 110 includes a first cage portion 111 and a second cage portion 112.
  • the first cage portion 111 has a plate shape with a predetermined thickness, and a pair of second cage portions 112 are formed extending on both sides of the first cage portion 111 as shown in FIG. 7 .
  • the first cage portion 111 and the second cage portion 112 are orthogonal to each other and are formed to extend in a bent shape.
  • a plurality of first holes 1111 penetrating in the vertical direction are formed in the first cage portion 111, and a plurality of second holes 1121 penetrating in a direction perpendicular to the vertical direction are formed in the second cage portion 112. It is desirable for this to be formed.
  • the first LED unit 131 and the second LED unit 132 are coupled to the first hole 1111 and the second hole 1121, respectively. More specifically, the panel to which the first LED unit 131 is coupled is coupled to the outer surface of the first cage unit 111, and at the same time, the first LED unit 131 penetrates the first hole 1111. , the panel to which the second LED unit 132 is coupled is coupled to the outer surface of the second cage unit 112, and at the same time, the second LED unit 132 penetrates the second hole 1121.
  • UV-LED is irradiated to both the top and sides of the 3D printed object due to the above structure. Therefore, there is an advantage that the cross-sectional area of the UV-LED applied to the 3D printed object is increased, and post-curing efficiency is maximized.
  • the loading unit 120 includes a circular tray unit 121 and a rotator unit 122.
  • the circular tray unit 121 supports the 3D printed object.
  • the rotator unit 122 is coupled to the center of the circular tray unit 121 and rotates in conjunction with the motor 123. Therefore, under the control of the motor 123, the circular tray unit 121 rotates based on the virtual central axis in the vertical direction formed by the rotator unit 122, which causes the circular tray unit 121
  • the 3D printed object placed on the machine also rotates. This has the advantage of increasing the cross-sectional area of the UV-LED applied to the 3D printed object and maximizing post-curing efficiency.
  • the LED unit 130 includes a first LED unit 131 and a second LED unit 132. It is desirable that the LED unit 130 irradiates UV-LED. Additionally, as described above, the first LED unit 131 is coupled through the first hole 1111, and the second LED unit 132 is coupled through the second hole 1121.
  • the heat sink unit 140 and the cooler unit 150 are coupled to the outer surface of the LED unit 130. Therefore, it is coupled to the upper part of the first LED part 131 and the side part of the second LED part 132.
  • the heat sink unit 140 and the cooler unit 150 serve to generate heat generated from the LED unit 130.
  • the heat sink and cooler play a role in dissipating heat, and since the role of the parts themselves is known technology, detailed description will be omitted.
  • the heat generated from the LED unit 130 continues to exist within the curing unit 100, it may damage internal components and adversely affect the physical properties of the 3D printed product that has undergone post-curing. Therefore, when heat is generated in the case part 101 due to the configuration of the heat sink part 140 and the cooler part 150 of the present invention, damage to the parts of the present invention is minimized and the physical properties of the post-cured 3D printed product are improved. It has the advantage of minimizing factors that may have a negative impact.
  • the heat sink unit 140 and the cooler unit 150 coupled to the second LED unit 132 are preferably adjacent to the lower hole 103 formed in the case unit 101 as shown in FIG. 2. Because of this, heat generated in the second LED unit 132 can be quickly discharged through the lower hole 103, resulting in a structure in which cooling efficiency is maximized.
  • UV LED is irradiated to the top and sides of the 3D printed object placed on the loading unit 120 for post-curing, and at the same time, the loading unit 120 is rotated to produce a 3D printed object.
  • the cross-sectional area of UV LED irradiation is maximized. Therefore, there is an advantage in that post-curing efficiency is maximized by improving physical properties through post-curing.
  • Figure 5 shows the front of a device for post-curing 3D printed objects according to the present invention.
  • the curing unit 100 of the device for post-curing 3D printed objects according to the present invention further includes a door portion 105 and an LCD panel portion 106.
  • the front portion of the case portion 101 of the curing unit 100 is partially open, and the door portion 105 is linked and coupled thereto.
  • the door part 105 can be opened and closed, and through this, the door part 105 is closed during the post-curing process, and the door is closed during the process of inserting the 3D printed object into the loading part 120 or removing the 3D printed object that has completed post-curing.
  • Part 105 is open. Therefore, there is an advantage that work efficiency is increased.
  • the nitrogen concentration, acidity concentration, amount of UV-LED irradiated, etc. inside the case unit 101 can be expressed in numbers. This has the advantage of being able to monitor post-curing work in real time.
  • the curing unit 100 of the device for post-curing a 3D printed object according to the present invention may further include an air vent unit 160.
  • the air vent unit 160 is preferably coupled to the inner surface of the upper part of the case unit 101, inside the case unit 101.
  • the air vent unit 160 preferably includes a first air vent 161 and a second air vent 162.
  • the first air vent 161 is preferably in the shape of a panel, with the center protruding downward and both ends of the center bent.
  • a pair of panel-shaped devices is provided at both ends of the first air vent 161. It is preferable that the two air vents 162 each extend.
  • upper holes 102 are formed in the case portion 101 at both ends of the position where the air vent portion 160 is formed.
  • the heat generated in the first LED unit 131 moves to the upper part of the case unit 101 through the heat sink unit 140 and the cooler unit 150.
  • the air vent unit When heat contacts (160), due to the configuration of the protruding and bent first air vent (161) and the second air vent (162) that guides the flow in the direction of the upper hole (102), the heat is transferred to the first air vent (160). It sequentially flows through (161) and the second air vent (162) and is discharged into the upper hole (102). Therefore, heat is not trapped inside the case portion 101 and is quickly discharged through the upper hole 102, which has the advantage of maximizing cooling efficiency and helping to improve the physical properties of the post-cured 3D printed object.
  • a UV detection sensor (not shown) be coupled to the inside of the cage portion 110.
  • the amount of UV LED applied to the 3D printed object located inside the cage unit 110 can be monitored in real time, which has the advantage of facilitating quality control.
  • Figure 4 shows the back of the device for post-curing 3D printed materials according to the present invention
  • Figure 8 is an enlarged view of the rear disassembled vicinity of the cage portion of the curing unit of the device for post-curing 3D printed materials according to the present invention. It is shown.
  • connection unit 300 will be described.
  • Nitrogen generated in the nitrogen generating unit 200 flows into the curing unit 100 along the connecting unit 300. In particular, nitrogen is moved through the nitrogen generating unit 200 and the connection pipe 310 (see FIG. 4) protruding to the outside of the curing unit 100.
  • the moved nitrogen moves to the nitrogen supply unit 320 located inside the case part 101 of the curing unit 100.
  • One side of the nitrogen supply unit 320 extends from the connection pipe 310, and the other side is branched into two flow paths and respectively coupled through a pair of cage branch holes 1131. In this way, the nitrogen supply efficiency inside the case portion 101 can be maximized by branching into two flow paths instead of a single flow path.
  • the cage portion 110 further includes a third cage portion 113.
  • the third cage portion 113 has a plate shape with a predetermined thickness like the first cage portion 111 and the second cage portion 112, and extends at right angles to the back of the first cage portion 111 in a bent shape. It is desirable to form Accordingly, the loading unit 120 and the 3D printed object placed on the loading unit 120 are located in front of the third cage unit 113.
  • the third cage portion 113 is preferably formed by a pair of cage branch holes 1131 spaced apart at a predetermined distance.
  • the end of the nitrogen supply unit 320 passes through the cage branch hole 1131 to form a structure that directly supplies nitrogen to the inside of the cage unit 110.
  • the present invention forms a structure in which the cage part 110 surrounds the loading part 120 where the 3D printed object is located, and at the same time, nitrogen is directly transported into the cage part 110 through the connection unit 300. This creates an environment in which oxygen can be minimized and nitrogen can be maximized within the cage portion 110.
  • Minimizing oxygen and maximizing nitrogen provides excellent post-cure results (e.g., improved physical properties such as strength) of 3D printed materials. Therefore, according to the present invention, it is possible to isolate the 3D printed object and maximize the supply of nitrogen to the isolated space to improve the physical properties of the 3D printed object and increase product quality.
  • the lubricity is improved when comparing the color of the finished 3D printed product with the conventional general post-curing processing method.
  • glazing treatment has the effect of improving surface coating power.
  • surface roughness is improved and polishing workability is improved.
  • the 3D printed material according to the conventional general method is about 96%, and according to the present invention, it is about 99%. In other words, according to the present invention, there is an advantage of improving safety by minimizing residues.
  • Figure 13 is an actual photo of a 3D printed product completed by a conventional post-curing processing method
  • Figure 14 is an actual photograph of a 3D printed product completed by a post-curing processing method according to the present invention. You can see that the lubrication has clearly improved just by looking at the side.
  • a cage coupling hole 1132 is formed in the third cage portion 113.
  • An oxygen sensor (not shown) is coupled through the cage coupling hole 1132.
  • a vent hole 1121a is formed at one point of the second cage portion 112. Additionally, it is preferable that the exhaust fan 170 and filter 171 are coupled to the vent hole 1121a.
  • the filter 171 is preferably a carbon filter, for example.
  • the first LED unit 131 preferably includes a first element 1311, a second element 1312, and a third element 1313.
  • the first to third elements 1311 to 1313 refer to a single element or group that generates UV-LED.
  • Figure 10 is a graph showing the amount of energy applied to the circular tray unit 121 on which the 3D printed object according to the present invention is placed when UV-LED is irradiated from an LED with a conventional irregular element arrangement. .
  • the x-axis is the distance (mm) from one end of the circular tray unit 121 to the other end, and the y-axis is the amount of energy irradiated.
  • the amount of energy of the irradiated UV-LED is evenly distributed to the circular tray unit 121.
  • the amount of energy is concentrated in a specific section (e.g., the center)
  • the first LED unit 131 has a first element 1311 at the center, is spaced apart from the first element 1311 at a predetermined distance, and moves in a circumferential direction around the first element 1311.
  • a plurality of second elements 1312 and the first element 1311 are spaced apart at a predetermined distance, and are spaced apart at a predetermined distance in the circumferential direction with the first element 1311 as the center. It includes a plurality of third elements 1313.
  • the distance between the third element 1313 and the first element 1311 is longer than that of the second element 1312.
  • the first LED unit 131 has one first element 1311, eight second elements 1312, and eight third elements 1313. Additionally, the second element 1312 is spaced apart by 70 mm from the first element 1311, and the third element 1313 is spaced apart by 120 mm from the first element 1311. That is, the number of second elements 1312 and third elements 1313 were set to be the same.
  • Figure 11 is a graph showing the amount of energy applied to the circular tray unit 121 according to the first embodiment of the present invention.
  • the amount of energy is distributed more evenly than before. More specifically, the amount of energy at the peak point is less than before, but it can be seen that the amount of energy distributed near the peak point is evenly distributed.
  • UV-LED is irradiated
  • the range in which UV-LED is irradiated is about 150mm, from about 30mm to 180mm, and it can be seen that it is irradiated to a wider section than the conventional technology (about 120mm in the conventional case), which increases the post-curing efficiency by widening the irradiation cross-sectional area. You can see that this increases.
  • Figure 12 is a graph showing the amount of energy applied to the circular tray unit 121 according to the second embodiment of the present invention.
  • the first LED unit 131 has one first element 1311, six second elements 1312, and 12 third elements 1313. Additionally, the second element 1312 is spaced apart from the first element 1311 by 80 mm, and the third element 1313 is spaced apart from the first element 1311 by 150 mm. That is, the number of third elements 1313 was increased than the number of second elements 1312.
  • the amount of energy is distributed more evenly than before. More specifically, the amount of energy at the peak point is less than before, but it can be seen that the amount of energy distributed near the peak point is evenly distributed.
  • UV-LED is irradiated
  • the range in which UV-LED is irradiated is about 170mm, from about 30mm to 200mm, and it can be seen that it is irradiated to a wider section than the conventional technology (about 120mm in the conventional case), which increases the post-curing efficiency by widening the irradiation cross-sectional area. You can see that this increases.
  • the amount of energy at the peak point is small, but there is an advantage in that the irradiation range can be increased. Therefore, it has the advantage of being easy to respond to because it can be selectively applied depending on the work environment or the object of the 3D printed object.
  • the present invention relates to a device for post-curing 3D printed materials. More specifically, it provides a nitrogen environment that minimizes oxygen by supplying nitrogen into the device during the post-curing process, thereby increasing the strength of the 3D printed material that has undergone post-curing.
  • We want to improve the physical properties such as:

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Abstract

La présente invention concerne un dispositif de post-durcissement d'un produit imprimé en 3D, et, plus spécifiquement, le but de la présente invention est de fournir un environnement d'azote ayant une teneur minimale en oxygène par introduction d'azote dans le dispositif dans un processus de post-durcissement, et, ainsi, d'améliorer les caractéristiques physiques, telles que la rigidité, d'un produit imprimé en 3D post-durci.
PCT/KR2022/013188 2022-07-08 2022-09-02 Dispositif de post-durcissement de produit imprimé en 3d WO2024010135A1 (fr)

Applications Claiming Priority (2)

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KR10-2022-0084292 2022-07-08
KR1020220084292A KR20240007839A (ko) 2022-07-08 2022-07-08 3d 프린터물의 후경화를 위한 장치

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WO2024010135A1 true WO2024010135A1 (fr) 2024-01-11

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018124457A1 (fr) * 2016-12-28 2018-07-05 전자부품연구원 Source de lumière linéaire utilisant des del ultraviolettes, et imprimante (3d) de photopolymère comprenant la source de lumière linéaire
KR20190054856A (ko) * 2017-11-14 2019-05-22 소나글로벌 주식회사 광량제어 및 고밀도 uv 조사구조를 갖는 3d 프린터용 uv 후경화장치.
KR20210045951A (ko) * 2020-10-21 2021-04-27 김민건 3d 프린팅 치의학 출력물의 진공 및 공기 후경화 장치
KR102252465B1 (ko) * 2019-11-28 2021-05-14 주식회사 그래피 3d 프린트 출력물의 후경화 공정 및 이의 장치
US20210237355A1 (en) * 2020-02-03 2021-08-05 Advanced Solutions Life Sciences, Llc Modular light source for curing of 3d printed biological and engineered materials

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018124457A1 (fr) * 2016-12-28 2018-07-05 전자부품연구원 Source de lumière linéaire utilisant des del ultraviolettes, et imprimante (3d) de photopolymère comprenant la source de lumière linéaire
KR20190054856A (ko) * 2017-11-14 2019-05-22 소나글로벌 주식회사 광량제어 및 고밀도 uv 조사구조를 갖는 3d 프린터용 uv 후경화장치.
KR102252465B1 (ko) * 2019-11-28 2021-05-14 주식회사 그래피 3d 프린트 출력물의 후경화 공정 및 이의 장치
US20210237355A1 (en) * 2020-02-03 2021-08-05 Advanced Solutions Life Sciences, Llc Modular light source for curing of 3d printed biological and engineered materials
KR20210045951A (ko) * 2020-10-21 2021-04-27 김민건 3d 프린팅 치의학 출력물의 진공 및 공기 후경화 장치

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