KR102341722B1 - A 3D Printing System And Fabricating Method of 3D structure using the same - Google Patents

Abstract

The present invention relates to a 3D printing system comprising: a base substrate providing unit; a resin supply unit disposed continuously with the base substrate providing unit and for applying a resin to the base substrate; a 3D structure forming unit disposed continuously with the resin supply unit and for forming a 3D structure inside the resin by curing the resin; a substrate separation unit disposed adjacent to the 3D structure forming unit and for separating the 3D structure formed in the resin and the base substrate; and a resin recovery unit disposed adjacent to the substrate separation unit and for recovering the resin from the 3D structure separated from the base substrate; and a manufacturing method of a 3D structure using the same. It is possible to provide a 3D printing system and a manufacturing method of a 3D structure capable of manufacturing a 3D structure such as a micro-lattice structure in a large area and capable of mass production because a 3D structure can be manufactured by a continuous process.

Description

A 3D Printing System And Fabricating Method of 3D structure using the same}

The present invention relates to a 3D printing system and a method for manufacturing a 3D structure using the same, and more particularly, to a 3D printing system capable of manufacturing a 3D structure in a large area and capable of mass production, and a method for manufacturing a 3D structure using the same will be.

In the existing 3D printing technology using light as a source, the manufacturing area, manufacturing time, and precision are determined by energy concentration, resolution, light intensity, and light reactivity.

However, due to the limitation of the total amount of energy of light used as a source, the manufacturing area is limited and manufacturing takes a lot of time.

For this reason, in the case of a target product that can be manufactured through 3D printing technology, the size thereof is inevitably limited.

Meanwhile, the micro-lattice structure, which is a 3D structure, is a micro-lattice structure that weighs only 1/100 of that of Styrofoam, and is a material developed as a very light and ultra-light structure.

At this time, the micro-lattice structure has high specific strength and can flexibly absorb external shocks, so it is possible to flexibly absorb external shocks. It can be applied to high-performance materials having functions such as reinforcement of structures in the field.

However, even in manufacturing such a micro-lattice structure, there is a problem that the size is very limited because the manufacturing area is limited and the manufacturing takes a lot of time.

Chinese Laid-Open Patent No. 103958392

An object of the present invention is to provide a 3D printing system capable of manufacturing a 3D structure in a large area and capable of mass production, and a method of manufacturing a 3D structure using the same.

Objects of the present invention are not limited to the objects mentioned above, and other objects not mentioned will be clearly understood by those skilled in the art from the following description.

In order to solve the above-mentioned problems, the present invention provides a base substrate; a resin supply unit disposed continuously with the base substrate providing unit and configured to apply a resin to the base substrate; a 3D structure forming unit disposed continuously with the resin supply unit and configured to form a 3D structure inside the resin by curing the resin; a substrate separation unit disposed adjacent to the 3D structure forming unit and configured to separate the 3D structure formed in the resin and the base substrate; and a resin recovery unit disposed adjacent to the substrate separation unit and configured to recover the resin from the 3D structure separated from the base substrate.

In addition, the present invention provides a 3D printing system that is disposed adjacent to the resin recovery unit and includes a cleaning unit for cleaning the 3D structure.

In addition, the present invention the base substrate providing unit, the base substrate supply roller; and a first transfer roller for transferring the base substrate supplied from the base substrate supply roller, wherein the base substrate is wound on the base substrate supply roller, and the base substrate is continuously supplied to the first transfer roller It provides a 3D printing system, characterized in that.

In addition, the present invention, the resin supply unit, a resin supply device for supplying the resin to the base substrate; and a resin blocking part for preventing the resin supplied from the resin supply device from overflowing in the direction of the first transfer roller.

In addition, the present invention is the 3D structure forming unit, a light providing unit; a mask for defining an irradiation area of the light provided to the light providing unit; a lens unit for concentrating the light provided through the mask and irradiating the concentrated light to the resin; And it provides a 3D printing system comprising a reflector for reflecting the light focused by the lens unit.

In addition, the present invention, the substrate separation unit, a second transfer roller for transferring the base substrate on which the 3D structure formed inside the resin is located; a separation cutter unit for separating the base substrate from the resin on which the 3D structure is formed; and a base substrate recovery roller for recovering the base substrate separated by the separation cutter unit. and a third transfer roller for transferring the resin on which the 3D structure is formed, from which the base substrate is separated.

In addition, the present invention provides a 3D printing system characterized in that the base substrate is wound around the base substrate recovery roller, and the base substrate is continuously recovered by the base substrate recovery roller.

In addition, the present invention is a blower for supplying air to the 3D structure, transferred by the resin recovery unit, the third transfer roller; And it provides a 3D printing system comprising a resin recovery container for recovering the resin separated by the blower.

In addition, the present invention comprises the steps of providing a base substrate; applying a resin on an upper portion of the base substrate; forming a 3D structure inside the resin by irradiating light to the resin to cure a certain area of the resin; separating the 3D structure and the base substrate formed in the resin; and recovering the resin from the 3D structure separated from the base substrate.

In addition, the present invention provides a method of manufacturing a 3D structure further comprising the step of cleaning the 3D structure after the step of recovering the resin from the 3D structure separated from the base substrate.

According to the present invention as described above, since 3D structures can be manufactured by a continuous process, 3D structures such as micro-lattice structures can be manufactured in a large area and 3D printing capable of mass production It is possible to provide a system and a method for manufacturing a 3D structure using the same.

1 is a schematic diagram showing a 3D printing system according to the present invention.
2 to 5 are schematic views for explaining a method of manufacturing a 3D structure according to the present invention.
6 is a view showing a micro-lattice structure of a general structure.

Advantages and features of the present invention and methods of achieving them will become apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but will be implemented in a variety of different forms, and only these embodiments allow the disclosure of the present invention to be complete, and common knowledge in the technical field to which the present invention belongs It is provided to fully inform the possessor of the scope of the invention, and the present invention is only defined by the scope of the claims.

With reference to the accompanying drawings will be described in detail for the implementation of the present invention. Irrespective of the drawings, like reference numbers refer to like elements, and "and/or" includes each and every combination of one or more of the recited items.

Although the first, second, etc. are used to describe various elements, these elements are not limited by these terms, of course. These terms are only used to distinguish one component from another. Accordingly, it goes without saying that the first component mentioned below may be the second component within the spirit of the present invention.

The terminology used herein is for the purpose of describing the embodiments and is not intended to limit the present invention. In this specification, the singular also includes the plural unless specifically stated otherwise in the phrase. As used herein, “comprises” and/or “comprising” does not exclude the presence or addition of one or more other components in addition to the stated components.

Unless otherwise defined, all terms (including technical and scientific terms) used herein may be used with the meaning commonly understood by those of ordinary skill in the art to which the present invention belongs. In addition, terms defined in a commonly used dictionary are not to be interpreted ideally or excessively unless clearly defined in particular.

Spatially relative terms "below", "beneath", "lower", "above", "upper", etc. It can be used to easily describe the correlation between a component and other components. Spatially relative terms should be understood as terms including different directions of components during use or operation in addition to the directions shown in the drawings. For example, when a component shown in the drawing is turned over, a component described as “beneath” or “beneath” of another component may be placed “above” of the other component. can Accordingly, the exemplary term “below” may include both directions below and above. Components may also be oriented in other orientations, and thus spatially relative terms may be interpreted according to orientation.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram showing a 3D printing system according to the present invention.

1, the 3D printing system according to the present invention, the base substrate providing unit (100, A); a resin supply unit (200, B) disposed in series with the base substrate providing unit (100, A) and configured to apply a resin to the base substrate; a 3D structure forming unit (300, C) disposed continuously with the resin supply unit (200, B) and configured to form a 3D structure inside the resin by curing the resin; a substrate separation unit (400, D) disposed adjacent to the 3D structure forming unit (300, C) and configured to separate the 3D structure and the base substrate formed in the resin; a resin recovery unit (500, E) disposed adjacent to the substrate separation unit (400, D) and configured to recover the resin from the 3D structure separated from the base substrate; and a cleaning unit (600, F) disposed adjacent to the resin recovery unit (500, E) and configured to clean the 3D structure.

More specifically, first, the base substrate providing unit 100, A, the base substrate supply roller 110; and a first transfer roller 120 for transferring the base substrate supplied from the base substrate supply roller 110 .

At this time, the base substrate may be wound around the base substrate supply roller 110 , and the base substrate may be continuously supplied to the first transfer roller 120 .

In addition, the base substrate is polyethylene terephthalate (PET), polyethylene naphthalate (PEN), polycarbonate (PC), polystyrene (PS), polypropylene (PP), polyimide (PI), polyethylene sulfonate (PES) , polyoxymethylene (POM), polyether ether ketone (PEEK), polyether sulfone (PES), and may be made of any one transparent plastic material selected from the group consisting of polyether imide (PEI).

Next, the resin supply unit 200, B, a resin supply device 210 for supplying the resin to the base substrate; and a resin blocking part 220 for preventing the resin supplied from the resin supply device from overflowing in the direction of the first transfer roller.

In this case, the resin may be a photocurable resin, and the photocurable resin may be cured by light, which will be described later, to form a 3D structure inside the resin.

That is, the photocurable resin refers to a resin that initiates a polymerization reaction by light energy such as ultraviolet (Ultraviolet, UV) or electron beam (EB) and causes a crosslinking reaction or polymerization reaction, and the photocurable resin may be a UV-curable resin (UV resin) or an electron beam-curable resin, but the type of the photo-curable resin is not limited in the present invention.

Next, the 3D structure forming part 300, C, as described above, for example, by irradiating UV light to the photocurable resin to cure the photocurable resin, the 3D structure inside the resin A region for forming a light providing unit 310; a mask 320 for defining an irradiation area of the light provided to the light providing unit 310; a lens unit 330 for concentrating the light provided through the mask 320 and irradiating the concentrated light onto the photocurable resin; and a reflector 340 for reflecting the light focused by the lens unit 330 .

In this case, the light providing unit 310 may provide an ultraviolet (Ultraviolet, UV) or an electron beam (EB), but the type of light provided through the light providing unit is not limited in the present invention.

In addition, the mask 320 is for defining an irradiation area of the light provided through the light providing unit 310 , and the light irradiation area is determined according to the shape of the mask 320 . Therefore, in the present invention, the mask Through the shape of 320, it is possible to determine the shape of the 3D structure manufactured by the 3D printing system of the present invention.

In addition, the lens unit 330 is configured to focus the light provided through the mask 320 and irradiate the light focused on the photocurable resin, and various types of lenses may be used, however, this Since it corresponds to a matter obvious in the industry, a detailed description below will be omitted.

On the other hand, when the light focused by the lens unit 330 is not irradiated to the photocurable resin, the concentrated light is reflected through the reflecting plate 340 so that it can be irradiated to the photocurable resin. .

In the present invention, a 3D structure, for example, a micro-lattice structure, may be formed in the resin through the 3D structure forming unit 300, C, but, the 3D structure forming unit (300, C) only corresponds to an example, and does not limit the type of the 3D structure forming part 300, C in the present invention.

Meanwhile, for forming a micro-lattice structure by irradiation with UV light, reference may be made to Chinese Patent Laid-Open No. 103958392, and in the present invention, in addition to the above-mentioned Chinese Patent Publication No. 103958392, various methods of forming a 3D structure are provided. By this, a 3D structure, for example, a micro-lattice structure may be formed inside the resin.

Next, the substrate separation unit 400, D is for separating the 3D structure and the base substrate formed in the resin, and transfers the base substrate on which the 3D structure formed in the resin is located. a second conveying roller 430 for; a separation cutter unit 420 for separating the base substrate from the resin on which the 3D structure is formed; and a base substrate recovery roller 410 for recovering the base substrate separated by the separation cutter 420; and a third transfer roller 440 for transferring the resin on which the 3D structure is formed, from which the base substrate is separated.

That is, the base substrate on which the 3D structure formed inside the resin, transferred along the second transfer roller 430 is located, is transferred to the resin on which the base substrate and the 3D structure are formed by the separation cutter unit. At this time, the separated base substrate is continuously recovered by the base substrate recovery roller 410, and the resin on which the separated 3D structure is formed is, by the third transport roller 440, the next move to step.

In this case, the base substrate may be wound around the base substrate collection roller 410 , and the base substrate may be continuously collected by the base substrate collection roller 410 .

Next, the resin recovery part (500, E) is for recovering the resin from the 3D structure separated from the base substrate and transferred by the third transfer roller 440, Blower 510 for supplying; and a resin recovery container 520 for recovering the resin separated by the blower 510, however, in the present invention, the type of the resin recovery part is not limited, and through various known methods, The resin may be recovered from the 3D structure.

At this time, compared to the resin applied on the base substrate in step B, the resin recovered by the resin recovery unit is formed into a 3D structure by curing a certain area, and corresponds to the remaining resin, so that the resin The resin recovered by the recovery unit may be defined as residual resin.

Next, the cleaning unit (600, F) is for cleaning the 3D structure from which the residual resin is separated by the resin recovery unit, the cleaning spray 610 for supplying a cleaning solution; and a cleaning liquid recovery container 620 for recovering the cleaning liquid supplied from the cleaning spray 610 .

However, the type of the cleaning unit is not limited in the present invention, and the 3D structure may be cleaned through various known methods, and the presence or absence of the cleaning unit is not limited in the present invention.

Hereinafter, a method of manufacturing a 3D structure using the 3D printing system according to the present invention will be described in more detail.

2 to 5 are schematic views for explaining a method of manufacturing a 3D structure according to the present invention.

First, referring to FIG. 2 , the method of manufacturing a 3D structure according to the present invention includes providing a base substrate 10 ( S110 ).

At this time, the base substrate 10 may be continuously supplied to the first transfer roller 120 in a state wound around the base substrate supply roller 110 .

In addition, since the base substrate is supplied to the first transfer roller 120 in a state wound around the base substrate supply roller, the base substrate corresponds to a flexible substrate, and further, in a step to be described later, the base substrate Since light such as UV light must be irradiated to the resin by passing through the resin, the base substrate is preferably a transparent substrate.

Therefore, the base substrate according to the present invention is preferably a transparent and flexible substrate, and on the premise of this, the material of the base substrate according to the present invention is not limited.

On the other hand, in the present invention, as described below, the 3D structure can be manufactured in a large area by a continuous process and is characterized in that mass production is possible, so as described above, the base substrate is the first transfer roller It is preferable to continuously feed to 120.

Continuingly, referring to FIG. 2 , the method of manufacturing a 3D structure according to the present invention includes applying a resin 20 on the base substrate 10 ( S120 ).

The application of the resin 20 on the upper portion of the base substrate 10 may be applied through the resin supply device 210 , and in this case, the resin applied on the upper portion of the base substrate is transferred to the first transfer roller 120 . In order to prevent overflow in the direction, in the present invention, it is preferable to include a resin blocking part 220 between the resin supply device 210 and the first transfer roller 120 .

At this time, the resin may be a photocurable resin, and the photocurable resin may be a UV curable resin (UV resin) or an electron beam curable resin, however, in the present invention, It does not limit the type.

Meanwhile, as shown in FIG. 2 , even in the process of performing step S120 , the above-described step S110 , that is, the step of providing the base substrate 10 is continuously performed, and thus, the manufacturing of the 3D structure according to the present invention The method proceeds by a continuous process.

Next, referring to FIG. 3 , in the method of manufacturing a 3D structure according to the present invention, the resin 20 is irradiated with light to harden a certain area of the resin, and the 3D structure 30 is formed inside the resin. and forming (S130).

At this time, the light irradiated to the resin may be ultraviolet (Ultraviolet, UV) light or electron beam (EB) light, and in the present invention, according to the type of light irradiated to the resin, the resin supply device 210 is Through this, the type of resin applied to the base substrate may be changed.

That is, when the light irradiated to the resin is ultraviolet (Ultraviolet, UV) light, the resin applied to the base substrate may be a UV curing resin (UV resin). In the case of electron beam (EB) light, the resin applied to the base substrate may be an electron beam curing resin.

At this time, by irradiating light to the resin 20 to harden a certain region of the resin, and to form the 3D structure 30 in the resin, the 3D structure forming part 300, C of FIG. 1 described above can proceed through

More specifically, when light, for example, ultraviolet (Ultraviolet, UV) light or electron beam (EB) light, is provided to the mask 320 through the light providing unit 310, the mask 320 The irradiation area of light is determined by the shape of As a certain region of the resin is cured, the 3D structure 30 may be formed in the resin 20 .

At this time, when the light focused by the lens unit 330 is not irradiated to the resin, the concentrated light may be reflected through the reflecting plate 340 to be irradiated to the resin.

Also, in the present invention, a 3D structure, for example, a micro-lattice structure, may be formed in the resin through the 3D structure forming unit 300, C, but, the 3D structure The forming units 300 and C are only examples, and the type of the 3D structure forming units 300 and C is not limited in the present invention.

On the other hand, as shown in Fig. 3, even in the process of proceeding to step S130, the above-described step S120, that is, the step of applying the resin 20 on the upper portion of the base substrate 10 proceeds continuously, and thus, The manufacturing method of the 3D structure according to the present invention proceeds by a continuous process.

Next, referring to FIG. 4 , the method of manufacturing a 3D structure according to the present invention includes separating the 3D structure 30 and the base substrate 10 formed in the resin 20 ( S140).

That is, by the above-described step S130, the 3D structure 30 is formed inside the resin 20 applied to the upper portion of the base substrate 10, and through this step S140, the resin 20 The 3D structure 30 and the base substrate 10 formed inside are separated.

At this time, the separation of the 3D structure 30 and the base substrate 10 formed in the resin 20 may be performed through the 3D substrate separation unit 400, D of FIG. 1 described above.

More specifically, through the second transfer roller 430, the base substrate on which the 3D structure formed in the resin is located is transferred to the separation cutter unit 420, and to the separation cutter unit 420. Thus, the base substrate is separated from the resin on which the 3D structure is formed.

Thereafter, the base substrate separated by the separation cutter unit 420 is collected by the base substrate recovery roller 410 , and the resin from which the base substrate is separated and the 3D structure is formed is transferred to the third transfer unit. It is conveyed through a roller 440 .

In this case, the separated base substrate may be wound around the base substrate collection roller 410 , and the base substrate may be continuously collected by the base substrate collection roller 410 .

On the other hand, as shown in FIG. 4 , even in the process of proceeding to step S140 , the above-described step S130 , that is, by irradiating light to the resin 20 to cure a certain area of the resin, 3D inside the resin The step of forming the structure 30 proceeds continuously, and thus, the method of manufacturing the 3D structure according to the present invention proceeds by a continuous process.

Next, referring to FIG. 5 , the method of manufacturing a 3D structure according to the present invention includes recovering the resin 20 from the 3D structure 30 separated from the base substrate (S150).

At this time, compared with the resin applied on the base substrate in step S120, the resin 20 recovered from the 3D structure 30 in step S150 is cured to form a 3D structure, and the remaining Since it corresponds to a resin to be used, the resin recovered by the resin recovery unit may be defined as a residual resin.

The step of recovering the resin 20 from the 3D structure 30 separated from the base substrate may be performed through the resin recovery units 500 and E of FIG. 1 described above.

More specifically, air is supplied to the 3D structure 30 through a blower 510 to separate the residual resin 20 from the 3D structure 30, and the separated residual resin is stored in the resin recovery container ( 520) can be recovered.

At this time, the residual resin recovered in the resin recovery container 520 is re-supplied to the resin supply device 210 of FIG. 1 described above, so that the residual resin can be reused in the present invention.

On the other hand, as shown in FIG. 5 , even in the process of performing step S150 , in step S140 , that is, separating the 3D structure 30 and the base substrate 10 formed in the resin 20 , The steps proceed continuously, and thus, the method for manufacturing a 3D structure according to the present invention proceeds by a continuous process.

Continuingly, referring to FIG. 5 , the method of manufacturing a 3D structure according to the present invention includes cleaning the 3D structure 30 ( S160 ).

The cleaning of the 3D structure may be performed through the cleaning units 600 and F of FIG. 1 described above.

More specifically, after the 3D structure 30 is cleaned by supplying the cleaning liquid to the 3D structure through the cleaning spray 610 that supplies the cleaning liquid, the cleaning liquid used for cleaning the 3D structure is the cleaning liquid recovery container It can be recovered through (620).

However, the type of the cleaning unit is not limited in the present invention, and the 3D structure may be cleaned through various known methods, and the presence or absence of the cleaning unit is not limited in the present invention.

Meanwhile, as shown in FIG. 5 , even in the process of performing step S160 , the above-described step S150 , that is, the step of recovering the resin 20 from the 3D structure 30 separated from the base substrate is continuously performed. Thus, the manufacturing method of the 3D structure according to the present invention proceeds by a continuous process.

Through steps S110 to S160 as described above, the 3D structure according to the present invention may be manufactured.

6 is a view showing a micro-lattice structure of a general structure.

At this time, the left diagram in FIG. 6 corresponds to a micro-lattice structure of the Kelvin structure, and the right diagram in FIG. 6 corresponds to a micro-lattice structure of the Octet structure.

As shown in FIG. 6 , a micro-lattice structure having a general structure has a limited manufacturing area due to a limitation of the manufacturing method, takes a lot of time to manufacture, and thus its size is very limited. There is this.

However, in the present invention, as shown in FIGS. 2 to 6, since a 3D structure can be manufactured by a continuous process, as can be seen from the final 3D structure shown in FIG. 6, microlattice (microlattice) It is possible to provide a 3D printing system capable of manufacturing large-area 3D structures such as -lattice) structures, and mass production, and a method of manufacturing 3D structures using the same.

Although embodiments of the present invention have been described with reference to the above and the accompanying drawings, those of ordinary skill in the art to which the present invention pertains can practice the present invention in other specific forms without changing its technical spirit or essential features. You can understand that there is Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive.

Claims (10)

a base substrate providing unit;
a resin supply unit disposed continuously with the base substrate providing unit and configured to apply a resin to the base substrate;
a 3D structure forming unit disposed continuously with the resin supply unit and configured to form a 3D structure including a microlattice structure in the resin by curing the resin;
a substrate separation unit disposed adjacent to the 3D structure forming unit and configured to separate the 3D structure formed in the resin and the base substrate; and
A resin recovery unit disposed adjacent to the substrate separation unit and configured to recover the resin from the 3D structure separated from the base substrate,
The 3D structure forming unit includes a light providing unit disposed under the base substrate; and
and a reflector disposed on the base substrate and reflecting at least a portion of the light provided from the light providing unit toward the base substrate. The method of claim 1,
A 3D printing system disposed adjacent to the resin recovery unit and including a cleaning unit for cleaning the 3D structure. The method of claim 1,
The base substrate providing unit, the base substrate supply roller; and a first transfer roller for transferring the base substrate supplied from the base substrate supply roller,
3D printing system, characterized in that the base substrate is wound around the base substrate supply roller, and the base substrate is continuously supplied to the first transfer roller. 4. The method of claim 3,
The resin supply unit may include: a resin supply device for supplying a resin to the base substrate; and a resin blocking part for preventing the resin supplied from the resin supply device from overflowing in the direction of the first transfer roller. 5. The method of claim 4,
The 3D structure forming unit may include a mask for defining an irradiation area of the light provided to the light providing unit; and a lens unit for concentrating the light provided through the mask and irradiating the concentrated light to the resin. 6. The method of claim 5,
The substrate separation unit may include a second transfer roller for transferring the base substrate on which the 3D structure formed in the resin is located; a separation cutter unit for separating the base substrate from the resin on which the 3D structure is formed; and a base substrate recovery roller for recovering the base substrate separated by the separation cutter unit. and a third transfer roller for transferring the resin on which the 3D structure is formed, from which the base substrate is separated. 7. The method of claim 6,
The base substrate is wound around the base substrate collection roller, and the base substrate is continuously collected by the base substrate collection roller. 7. The method of claim 6,
The resin recovery unit, the blower for supplying air to the 3D structure, transferred by the third transfer roller; and a resin recovery container for recovering the resin separated by the blower. providing a base substrate;
applying a resin to an upper portion of the base substrate;
forming a 3D structure including a microlattice structure inside the resin by irradiating light to the resin to cure a certain area of the resin;
separating the 3D structure and the base substrate formed inside the resin; and
Comprising the step of recovering the resin from the 3D structure separated from the base substrate,
The step of curing a predetermined region of the resin by irradiating light to the resin may include providing light from a light providing unit disposed below the base substrate, and applying at least a portion of the light provided by the light providing unit to the upper portion of the base substrate. A method of manufacturing a 3D structure comprising the step of irradiating the resin by reflecting it toward the base substrate through an arranged reflector. 10. The method of claim 9,
After recovering the resin from the 3D structure separated from the base substrate,
Method of manufacturing a 3D structure further comprising the step of cleaning the 3D structure.

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