KR102180198B1 - A method for manufacturing an article using a 3 dimensional printing - Google Patents

Abstract

The present invention relates to a production method of a molded product capable of enhancing durability and, more specifically, to a production method of a molded product, comprising: a first step of molding a base structure by 3D printing a thermoplastic resin; and a second step of immersing the base structure in a photo-curable resin solution and then irradiating light to form a smooth layer on a surface of the base structure.

Description

Manufacturing method of molded body using 3D printing {A METHOD FOR MANUFACTURING AN ARTICLE USING A 3 DIMENSIONAL PRINTING}

The present invention relates to a method for manufacturing a molded article using 3D printing, and more particularly, to a method for manufacturing a molded article using two or more 3D printing techniques in combination.

A 3D printer refers to a device that prints (shapes) a three-dimensional shape of a real object as it is based on a three-dimensional drawing (data). That is, after completing a 3D drawing using a CAD or 3D modeling program, the corresponding data is transmitted to the printer through a predetermined data interface, and the 3D printer performs a process of creating the corresponding molded body based on the transmitted drawing data. Is done. Specifically, after creating a virtual cross-section based on the drawing data, the molded body is manufactured by spraying a material such as metal or polymer through a nozzle to create and fuse a continuous layer.

3D printing is applied to various manufacturing fields such as architecture, structure (AEC), industrial design, automobile, aerospace, engineering, medical industry, biotechnology, fashion, and footwear.

The 3D printing technology is the SLA (stereolithography) method, which produces a molded body by partially sintering a liquid-based material, the SLS (selective laser sintering) method, which produces a powder-based material by sintering it, and There are various methods such as fused deposition modeling (FDM).

In particular, the FDM type 3D printer, which has been widely distributed due to its low price and small size, is in an urgent need for quality improvement. The FDM type 3D printer refers to a 3D printer in which plastic filaments are melted with the heat of a nozzle to make a liquid, and then stacked one by one to create a three-dimensional model. Due to the nature of such technology, the layers are inevitably visible on the surface of the completed three-dimensional model. The layered surface is exposed to the surface as it is like a staircase.

When stacking a three-dimensional model, this problem can be solved by setting the thickness of one layer as thin as possible, but if the layer is stacked too thinly, the strength of the finished model may be weakened. In addition, since it is a method of extruding and laminating a liquid melted with a plastic resin, there is a limit to making the layer thickness thin.

Most of the recently released FDM type 3D printers support printing with a thickness of about 0.1mm or to be set to a thickness smaller than this, but if the thickness is set too thin, the printing speed is significantly slowed.

The weak strength of the finished model is one of the challenges that 3D printing technology must solve in the future. The basic printing principle of 3D printers is a method of stacking models layer by layer from bottom to top. It can withstand the pressure applied vertically to the finished model, but it is easily damaged by impact or pressure acting horizontally.

In order to increase the strength of the model, it is advantageous to make the layer to be laminated as thin as possible. This is because it can increase the density of the model. However, this does not solve the fundamental problem. This is because no matter how high density the model is made, it can be easily damaged even with a small impact depending on the characteristics of the material.

On the other hand, thanks to the development of 3D printing technology, technologies that apply a 3D printer to shoe manufacturing, such as Korean Patent No. 10-1601688, are currently being developed. In this case, the configuration of a system and device for manufacturing customized shoes is complicated. There are limitations that are limitedly applied to certain members, such as shoes and soles. In addition, as described above, there is a problem that the appearance physical properties of the shoes manufactured by the foam lamination molding method are deteriorated.

The present invention is to solve the problems of the prior art described above, and an object of the present invention is to improve the appearance properties of a molded article by removing surface steps that exist on the inclined or curved surfaces of the base structure molded by 3D printing a thermoplastic resin. It is possible to provide a method of manufacturing a molded article capable of improving durability against impact or pressure acting in a horizontal direction by strengthening the bonding force between the layers forming the base structure.

One aspect of the present invention, a first step of molding a base structure by 3D printing a thermoplastic resin; And a second step of immersing the base structure in a photocurable resin solution and then irradiating light to form a smooth layer on the surface of the base structure.

In one embodiment, the first step may be performed by one selected from the group consisting of fused deposition modeling (FDM), selective laser sintering (SLS), and combinations thereof.

In an embodiment, the second step may be performed by one selected from the group consisting of stereolithography (SLA), digital light processing (DLP), and combinations thereof.

In one embodiment, the light transmittance of the base structure may be 20% or more.

In one embodiment, the thermoplastic resin is an acrylonitrile-butadiene-styrene copolymer, polyethylene, polypropylene, polyvinyl chloride, polyurethane ( polyurethane), a thermoplastic elastomer, and a combination of two or more of them may be one selected from the group consisting of.

In one embodiment, the thermoplastic resin is polycarbonate, polybutyleneterephtalate, polyoxymethylene, polyamide 6, polyamide 66, modified polyphenylene Oxide (modified polyphenylene oxide), polyphtalamide (polyphtalamide), liquid crystal polymer (liquid crystal polymer), polyether ether ketone (polyether ether ketone), polyimide (polyimide), polyamide (polyamide) and a combination of two or more of these It may be one selected from the group consisting of.

In one embodiment, the photocurable resin solution may include a photocurable resin, a photoinitiator, and a solvent.

In one embodiment, the photocurable resin is methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, hexanediol diacrylate, hexanediol dimethacrylate , Polyethylene glycol diacrylate, polyethylene glycol dimethacrylate, diethylene glycol diacrylate, diethylene glycol dimethacrylate, dipropylene glycol diacrylate, dipropylene glycol dimethacrylate, urethane acrylate and among them It may be one selected from the group consisting of two or more combinations.

In one embodiment, the light may be one selected from the group consisting of visible light, laser beam, ultraviolet (UV), electron beam, and a combination of two or more of them.

In one embodiment, the molded body may be a shoe member.

A method of manufacturing a molded article according to an aspect of the present invention is to form a smooth layer on the surface of the base structure by immersing a base structure molded by 3D printing a thermoplastic resin in a photocurable resin solution, and then irradiating light. It is possible to improve the appearance properties of the molded body by removing the surface step that exists on the inclined or curved surface of the structure, and improve the durability against impact or pressure acting in the horizontal direction by strengthening the bonding force between the layers forming the base structure. have.

The effects of the present invention are not limited to the above effects, and should be understood to include all effects that can be deduced from the configuration of the invention described in the detailed description or claims of the present invention.

1 is a schematic diagram of a method of manufacturing a molded article according to an embodiment of the present invention.
2 is a schematic cross-sectional view of a molded article according to an embodiment of the present invention.
3 is a schematic diagram of a method of manufacturing a molded article according to another embodiment of the present invention.

Hereinafter, the present invention will be described with reference to the accompanying drawings. However, the present invention may be implemented in various different forms, and therefore is not limited to the embodiments described herein. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and similar reference numerals are assigned to similar parts throughout the specification.

Throughout the specification, when a part is said to be "connected" to another part, this includes not only "directly connected" but also "indirectly connected" with another member interposed therebetween. . In addition, when a part "includes" a certain component, it means that other components may be further provided, rather than excluding other components unless specifically stated to the contrary.

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

One aspect of the present invention, a first step of molding a base structure by 3D printing a thermoplastic resin; And a second step of immersing the base structure in a photocurable resin solution and then irradiating light to form a smooth layer on the surface of the base structure.

The thermoplastic resin is an acrylonitrile-butadiene-styrene copolymer, polyethylene, polypropylene, polyvinyl chloride, polyurethane, thermoplastic elastomer ( thermoplastic elastomer) and a combination of two or more of them may be one general-purpose plastic, but is not limited thereto.

As used herein, the term "commodity plastics" refers to plastics having properties of general plastics.

As used herein, the term "thermoplastic elastomer" refers to a polymer material that has the properties of rubber at room temperature, that is, elasticity, but is plasticized at high temperature to allow various molding processes. For example, the thermoplastic elastomer may be one selected from the group consisting of polystyrene-based, polyolefin-based, polyurethane-based, polyester-based, vinyl chloride-based, and combinations or copolymers of two or more of them, but is not limited thereto.

In addition, the thermoplastic resin is polycarbonate, polybutyleneterephtalate, polyoxymethylene, polyamide 6, polyamide 66, modified polyphenylene oxide (modified polyphenylene). oxide), polyphtalamide, liquid crystal polymer, polyether ether ketone, polyimide, polyamide, and a combination of two or more of these It may be one engineering plastic or super engineering plastic, but is not limited thereto.

The term "engineering plastics" as used herein refers to plastics having physical properties that can be applied to engineering materials by supplementing the thermal properties and mechanical strength, which are the biggest disadvantages of general-purpose plastics, and " "Super-engineering plastics" refers to highly functional plastics with improved thermal and mechanical properties than engineering plastics.

The general-purpose plastic and the engineering or super engineering plastic may be used independently of each other as a matrix of the thermoplastic resin, and may be mixed and used as needed in consideration of the use, physical properties, and manufacturing cost of the final product. For example, although it is intended to realize the intrinsic properties of engineering or super engineering plastics, it is possible to mix and use general-purpose plastics at a certain ratio because the possibility of commercial acquisition is low and manufacturing costs may increase.

1 is a schematic diagram of a method of manufacturing a molded article according to an embodiment of the present invention.

The 3D printing is a method of forming an object by sequentially forming a plurality of layers in a pattern configured according to the shape and structure of the object to be manufactured, and is also referred to as additive processing.

Referring to FIG. 1, in the first step, the 3D printing may be performed by one selected from the group consisting of fused deposition modeling (FDM), selective laser sintering (SLS), and combinations thereof, preferably by FDM. It is not limited thereto.

In the case of the FDM, each layer constituting the base structure may be formed and laminated by dispensing the thermoplastic resin through a nozzle preheated to a predetermined temperature.

2 is a schematic cross-sectional view of a molded article according to an embodiment of the present invention. Referring to FIG. 2, a filament including a thermoplastic resin is melted by heat of a nozzle to form a liquid using the FDM method, and then the base structure 100 having a three-dimensional shape may be formed by stacking it layer by layer. Due to the nature of this technology, when the base structure 100 includes an inclined surface or a curved surface, the level difference due to the layer must be clearly revealed on the surface, and the level difference is exposed to the surface as it is like a staircase. Appearance properties can be deteriorated.

In addition, since each layer of the base structure 100 is stacked in a vertical direction, it can withstand the pressure applied vertically to the base structure, but can be easily damaged by impact or pressure acting horizontally.

In contrast, referring to FIGS. 1 and 2, by immersing the base structure 100 in a photocurable resin solution and then irradiating light to form a smoothing layer 200 on the surface of the base structure, A molded article capable of improving the appearance properties of the molded article by removing the surface step that exists on the inclined or curved surface, and improving the durability against impact or pressure acting in the horizontal direction by strengthening the bonding force between the layers forming the base structure. It is to provide a method of manufacturing.

The type, composition, and impregnation conditions of the photocurable resin solution may be appropriately adjusted in consideration of an allowable level of a step difference between layers formed on the surface of the base structure 100. For example, FIGS. 2(a) and 2(b) are schematic cross-sections of the finally manufactured molded article when a certain level of step difference is allowed and not allowed on the surface of the molded article, respectively.

When the base structure 100 is immersed in the photocurable resin solution in the second step, at least a part, preferably, all of the surface of the base structure 100 may be applied by the photocurable resin solution. . The applied photocurable resin solution may be introduced into the concave portion between the layers constituting the base structure regardless of whether or not such a step difference is allowed, and the introduced photocurable resin solution is cured by a predetermined light, thereby increasing the bonding strength between the layers. By reinforcing, durability against impact or pressure acting in the horizontal direction can be improved.

The type and composition of the photocurable resin solution is not particularly limited as long as it is commonly used for 3D printing of SLA (sterolithography) and/or DLP (digital light processing). In general, the photocurable resin solution may include a photocurable resin, a photoinitiator, and a solvent.

The photocurable resin is methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, hexanediol diacrylate, hexanediol dimethacrylate, polyethylene glycol diacrylate , Polyethylene glycol dimethacrylate, diethylene glycol diacrylate, diethylene glycol dimethacrylate, dipropylene glycol diacrylate, dipropylene glycol dimethacrylate, urethane acrylate, and a group consisting of a combination of two or more of these It may be one selected from, but is not limited thereto.

The photoinitiator is bis-acylphosphine oxide, phenylphosphineoxide, monoacylphosphine, alpha-hydroxyketone, alpha-aminoketone (α- aminoketone), (o-ethoxycarboxy)oxime), acetophenone, phenylglyoxylic, benzyldimethyl-ketal, Michler's ketone), imidazole, methylidynetrisdimethylaniline, idonium, sulfonium timonate, sulfonium phosphonate, metallocene (metallocene), oligomeric α-hydroxyketone, thioxanthone, benzoyl-sulphide, benzophenone, amino-benzoate, hydroxy It may be one selected from the group consisting of cyclohexylphenylketone and a combination of two or more of them, but is not limited thereto.

The solvent may be one selected from the group consisting of toluene, n-hexane, N,N-dimethylformamide, and a combination of two or more of them, but is limited thereto. no.

Meanwhile, the photocurable resin solution may further include a colorant, an antioxidant, and a stabilizer, if necessary.

The antioxidant is 3,5-di-tertiary-4-butylhydroxy toluene (3,5-di-tertiary-4-butylhydroxy toluene), tetrakis [methylene (3,5-di-t-butyl-4 -Hydroxylphenyl)propionate methane (tetrakis(methylene(3,5-di-tert-butyl-4-hydroxyphenyl)propionate methane), 1,2-bis(3,5-di-t-butyl-4- Hydroxyhydrocinnamoyl)hydrazine (1,2-bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamoyl)hydrazine), thiodiethylenebis[3-(3,5-di-t-butyl-4 -Hydroxyphenyl)propionate] (thiodiethylene bis[3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate]), octadecyl-3-(3,5-di-t-butyl- 4-hydroxyphenyl)propionate (octadecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate), isotryldecyl-3-(3,5-di-t-butyl-4 -Hydroxyphenyl) propionate (isotridecyl-3-(3,5-di-tert-butyl-4-hydroxyphenyl) propionate), N,N'-hexamethylenebis(3,5-di-t-butyl- 4-hydroxyhydrocinnamide) (N,N'-hexamethylene bis(3,5-di-tert-butyl-4-hydroxyhydrocinnamamide)), benzenepropanoic acid, 3.5-bis(1,1 -Dimethylethyl)-4-hydroxy-c7-9-branched alkyl esters (3,5-bis(1,1-dimethylethyl)-4-hydroxy-c7-9-branched alkyl esters), 2,2' -Ethylidenebis (4,6-di-tert-butylphenol) (2,2'-ethylidenebis (4,6-di-tert-butylphenol)), 1,3,5-triethyl-2,4, 6-tris (3,5-di-t-butyl-4-hydroxybenzyl) benzene (1,3,5-triethyl -2,4,6-tris(3,5-di-tert-butyl-4-hydroxybenzyl)benzene), 1,3,5-tris(2,6-dimethyl-3-hydroxy-4-t- Butylbenzyl)isocyanurate (1,3,5-tris(2,6-dimethyl-3-hydroxy-4-tert-butylbenzyl)isocyanurate), triethylene glycol-bis-3-(3-t-butyl- 4-hydroxy-5-methylphenyl)propionate (triethylene glycol-bis-3-(3-tert-butyl-4-hydroxy-5-methylphenyl)propionate), tris-(3,5-di-t-butyl Hydroxybenzyl) isocyanurate (tris-(3,5-di-tert-butylhydroxybenzyl)isocyanurate), 4,4'-butylidenebis(6-t-butyl-3-methylphenol) (4,4 It may be one selected from the group consisting of'-butylidenebis(6-tert-butyl-3-methylphenol)) and a combination of two or more of them, but is not limited thereto.

The stabilizer may be one selected from the group consisting of diethylethanolamine, trihexylamine, hindered amine, organophosphate, hindered phenol, and a combination of two or more of them, but is not limited thereto.

The light irradiated to the base structure to which the photocurable resin solution is applied in the second step may be one selected from the group consisting of visible light, laser beam, ultraviolet (UV), electron beam, and a combination of two or more thereof, Preferably, it may be ultraviolet rays, but is not limited thereto.

As the light, visible light is used when the photocurable resin solution is a material cured in the visible light range, and ultraviolet light is used when the material is cured in the ultraviolet light range, etc., depending on the properties of the photocurable resin solution. Can be used selectively according to. Conversely, the photocurable resin solution may be selectively used depending on the light.

Meanwhile, the surface of the base structure may include not only a surface constituting the outer periphery of the base structure, but also a surface exposed from the inside of the base structure toward the outside. For example, when the base structure has a hollow structure, that is, a structure in which at least part of the interior is empty, the surface may include an outer surface and an inner surface of the base structure.

The light applied in the second step will be able to effectively and appropriately act on the photocurable resin solution applied to the outer surface of the hollow base structure to cure it, but if the base structure does not have a necessary level of light transmittance The light reaches the photocurable resin solution applied to the inner surface of the hollow base structure, making it difficult to cure it.

Therefore, it is necessary to adjust the light transmittance of the base structure in a certain range so that the light applied in the second step acts on the photocurable resin solution applied to the surface of the base structure as a whole so that a partially uncured portion does not occur. There is.

For example, the light transmittance of the base structure may be 20% or more, preferably, 20 to 99%, more preferably, 30 to 99%, but is not limited thereto. If the light transmittance of the base structure is less than 20%, curing failure may occur partially on the surface of the base structure, resulting in deterioration of appearance properties, and the bonding force between the layers constituting the base structure and the impact acting in the horizontal direction accordingly, It is difficult to improve the durability against pressure.

3 is a schematic diagram of a method of manufacturing a molded article according to another embodiment of the present invention. Referring to FIG. 3, the second step may be performed by one selected from the group consisting of stereolithography (SLA), digital light processing (DLP), and combinations thereof.

That is, the second step consisting of at least two steps of immersing the base structure in a photocurable resin solution and then irradiating light to form a smooth layer on the surface of the base structure is SLA (stereolithography) and/or DLP. (Digital light processing) can be achieved in a single process using a 3D printer.

The SLA and/or DLP type 3D printer includes a bath supporting a photocurable resin solution. In a state in which the base structure is immersed in the bath, a smoothing layer having a required amount and thickness is formed on the surface of the base structure based on predetermined 3D drawing data, specifically, 3D drawing data for the surface of the base structure. can do.

Hereinafter, embodiments of the present invention will be described in detail.

Example 1

A side pattern of the shoe upper was formed by 3D printing a thermoplastic polyurethane (TPU) filament having a UV transmittance of 90% in the FDM method. The side pattern was immersed in a transparent photocurable resin solution usable for conventional stereolithography (SLA), and then taken out, and the transparent photocurable resin solution was applied to the surface of the side pattern. The transparent photocurable resin solution is cured when exposed to UV, and includes polyacrylic oligomers, polyfunctional monomers, monofunctional monomers, additives (polymerization inhibitors, leveling agents, antifoaming agents), photoinitiators, thickeners, solvents, and the like. The UV transmittance of the transparent photocurable resin solution is about 90%, and UV can penetrate and reach the inside thereof.

The side pattern is placed in a chamber equipped with a 0.3kW metal halide UV lamp having a wavelength range of 235 to 450 nm, irradiated with UV for 5 minutes to cure the applied transparent photocurable resin solution, and then taken out from the chamber to form a molded article. Fabrication was completed.

Example 2

A side pattern of the shoe upper was formed by 3D printing a thermoplastic polyurethane (TPU) filament having a UV transmittance of 90% in the FDM method. The side pattern was immersed in a colored photocurable resin solution usable for conventional stereolithography (SLA) and then taken out, and the colored photocurable resin solution was applied to the surface of the side pattern. The colored photocurable resin solution is cured when exposed to UV, and includes polyacrylic oligomers, polyfunctional monomers, monofunctional monomers, additives (polymerization inhibitors, leveling agents, antifoaming agents), photoinitiators, thickeners, pigments, solvents, and the like. The UV transmittance of the colored photocurable resin solution is about 50%, and UV can penetrate and reach a certain depth therein.

The side pattern is placed in a chamber equipped with a 0.3kW metal halide UV lamp having a wavelength range of 235 to 450 nm, irradiated with UV for 5 minutes to cure the applied colored photocurable resin solution, and then removed from the chamber to form a molded article Fabrication was completed.

Comparative Example 1

A side pattern of the shoe upper was formed by 3D printing a thermoplastic polyurethane (TPU) filament having a UV transmittance of 90% in the FDM method. The side pattern was immersed in a colored photocurable resin solution usable for conventional stereolithography (SLA) and then taken out, and the colored photocurable resin solution was applied to the surface of the side pattern. The colored photocurable resin solution is cured when exposed to UV, and includes polyacrylic oligomers, polyfunctional monomers, monofunctional monomers, additives (polymerization inhibitors, leveling agents, antifoaming agents), photoinitiators, thickeners, pigments, solvents, and the like. The UV transmittance of the colored photocurable resin solution is about 10%, and UV can penetrate and reach a certain depth therein.

The side pattern is placed in a chamber equipped with a 0.3kW metal halide UV lamp having a wavelength range of 235 to 450 nm, irradiated with UV for 5 minutes to cure the applied colored photocurable resin solution, and then removed from the chamber to form a molded article Fabrication was completed.

Comparative Example 2

The side pattern of the shoe upper was formed by 3D printing a thermoplastic polyurethane (TPU) filament having a UV transmittance of 10% by the FDM method. The side pattern was immersed in a transparent photocurable resin solution usable for conventional stereolithography (SLA), and then taken out, and the transparent photocurable resin solution was applied to the surface of the side pattern. The transparent photocurable resin solution is cured when exposed to UV, and includes polyacrylic oligomers, polyfunctional monomers, monofunctional monomers, additives (polymerization inhibitors, leveling agents, antifoaming agents), photoinitiators, thickeners, solvents, and the like. The UV transmittance of the transparent photocurable resin solution is about 90%, and UV can penetrate and reach the inside thereof.

The side pattern is placed in a chamber equipped with a 0.3kW metal halide UV lamp having a wavelength range of 235 to 450 nm, irradiated with UV for 5 minutes to cure the applied transparent photocurable resin solution, and then taken out from the chamber to form a molded article. Fabrication was completed.

Experimental example

The appearance of the molded article prepared according to the Examples and Comparative Examples and the peeling characteristics of the smooth layer were evaluated, and the results are shown in Table 1 below.

division Example 1 Example 2 Comparative Example 1 Comparative Example 2 UV transmittance of TPU
(%) 90 90 90 10 UV transmittance of photocurable resin solution
(%) 90 50 10 90 Surface appearance Great Good Bad Bad Peeling properties Great Good Bad Bad

Referring to Table 1 above, in the molded articles produced in Examples 1 and 2, the step-shaped step observed in the molded articles made of conventional DLP is substantially Was not observed, and the smoothing layer was strongly bonded to the surface of the molded article, indicating that the peeling property was also good.

On the other hand, the molded article prepared in Comparative Example 1 was easily peeled off the surface of the molded article because the photocurable resin solution applied to the side pattern was not sufficiently cured, and in the case of the molded article produced in Comparative Example 2, the view applied to the inner surface of the side pattern Since the chemical conversion resin solution was not cured sufficiently, defects such as tacky were observed locally.

The above description of the present invention is for illustrative purposes only, and those of ordinary skill in the art to which the present invention pertains will be able to understand that it can be easily modified into other specific forms without changing the technical spirit or essential features of the present invention. will be. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not limiting. For example, each component described as a single type may be implemented in a distributed manner, and similarly, components described as being distributed may also be implemented in a combined form.

The scope of the present invention is indicated by the claims to be described later, and all changes or modified forms derived from the meaning and scope of the claims and the concept of equivalents thereof should be construed as being included in the scope of the present invention.

100: base structure
200: smooth layer

Claims (10)

A first step of 3D printing a thermoplastic resin to form a base structure; And
The base structure is immersed in a photocurable resin solution, the photocurable resin solution is introduced into the concave portion between the layers constituting the base structure, and then light is irradiated to form a smooth layer on the surface of the base structure to form an inclined surface of the base structure. Or a second step of removing a surface step that exists on the curved surface; includes,
The light transmittance of the base structure is 90% or more,
The photocurable resin solution has a light transmittance of 50% or more. The method of claim 1,
The first step is performed by one selected from the group consisting of fused deposition modeling (FDM), selective laser sintering (SLS), and combinations thereof. The method of claim 1,
The second step is performed by one selected from the group consisting of stereolithography (SLA), digital light processing (DLP), and combinations thereof. delete The method of claim 1,
The thermoplastic resin is an acrylonitrile-butadiene-styrene copolymer, polyethylene, polypropylene, polyvinyl chloride, polyurethane, thermoplastic elastomer ( thermoplastic elastomer), and a method for producing a molded article, which is one selected from the group consisting of a combination of two or more of them. The method of claim 1,
The thermoplastic resin is polycarbonate, polybutyleneterephtalate, polyoxymethylene, polyamide 6, polyamide 66, modified polyphenylene oxide. , Polyphtalamide, liquid crystal polymer, polyether ether ketone, polyimide, polyamide, and one selected from the group consisting of a combination of two or more thereof , Method for producing a molded article. The method of claim 1,
The photocurable resin solution comprises a photocurable resin, a photoinitiator, and a solvent, a method of manufacturing a molded article. The method of claim 7,
The photocurable resin is methyl acrylate, methyl methacrylate, ethyl acrylate, ethyl methacrylate, butyl acrylate, butyl methacrylate, hexanediol diacrylate, hexanediol dimethacrylate, polyethylene glycol diacrylate , Polyethylene glycol dimethacrylate, diethylene glycol diacrylate, diethylene glycol dimethacrylate, dipropylene glycol diacrylate, dipropylene glycol dimethacrylate, urethane acrylate, and a group consisting of a combination of two or more of these One selected from, the method of manufacturing a molded article. The method of claim 1,
The light is one selected from the group consisting of visible light, laser beam, ultraviolet (UV), electron beam, and a combination of two or more of them, a method of manufacturing a molded article. The method according to any one of claims 1 to 3, and 5 to 9,
The molded article is a shoe member, a method of manufacturing a molded article.

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