KR102257085B1 - Top-down type 3d printer using high viscosity photocurable resin and manufacturing method of 3d printing structure using the same - Google Patents

Abstract

Disclosed are a top-down type 3D printer using a high-viscosity photo-curable resin, which is designed to prevent defects such as separation of each sculpture layer or cracks in advance even when the high-viscosity photo-curable resin is used so that excellent mechanical properties are secured, and a method for manufacturing a 3D printing sculpture.

Description

TOP-DOWN TYPE 3D PRINTER USING HIGH VISCOSITY PHOTOCURABLE RESIN AND MANUFACTURING METHOD OF 3D PRINTING STRUCTURE USING THE SAME}

The present invention relates to a top-down type 3D printer and a method of manufacturing a 3D printed sculpture using the same.More specifically, it is designed to prevent defects such as separation or cracks of each modeling layer even when a high-viscosity photocurable resin is used. Thus, it relates to a top-down type 3D printer using a high-viscosity photocurable resin capable of securing excellent mechanical properties, and a method of manufacturing a 3D printed sculpture using the same.

In general, in the 3D printing method, the SLA (StereoLithography Apparatus) method uses the principle that the scanned part is cured by irradiating laser light on a photocurable resin, and the light is irradiated using a projector under the storage tank in which the photocurable resin is stored. There are DLP (Digital Light Processing) method, FDM (Fused Deposition Modeling) method in which a structure is laminated by extruding a filament.

Among them, 3D printing technology of SLA and DLP method projects an ultraviolet light source (laser, projector, LCD, etc.) into a tank containing photocurable liquid resin, and each time the sculpture in the tank of the model is made one layer at a time. It rises or falls by the thickness of the layer, and then the ultraviolet light source is scanned again.

This SLA and DLP-type 3D printing technology is the most widely used technology with a medium molding speed because it has the advantages of high precision and excellent surface roughness.

However, in the case of the conventional SLA and DLP type photocurable resin for 3D printing, a low-viscosity photocurable resin was mainly used for ease of the process. There is a problem in that the mechanical properties are weak and deformation may occur at a temperature of approximately 60°C or higher.

Therefore, in recent years, efforts have been made to use a photocurable resin with a high polymer content or a high viscosity photocurable resin with a viscosity of about 10,000 cps or more by adding a large amount of ceramic or metal particles to improve mechanical properties such as strength and hardness. In progress.

However, when molding using a high-viscosity photocurable resin in the DLP (bottom-up) method, due to the high polymer content, the tank rises vertically by the thickness of the layer each time the sculpture is made, and the ultraviolet light source (laser, projector) , LCD, etc.), if each molding layer is separated in the vertical direction while the high-viscosity photocurable resin is cured, each molding layer is separated due to excessive stress, or a crack occurs in each molding layer. Caused.

In addition, when molding using a high-viscosity photocurable resin in the SLA (top-down) method, due to the high polymer content, the water tank descends vertically by the layer thickness and reloads on the cured top surface each time the sculpture is made layer by layer. Although it had to undergo coating (the process of covering the photocurable resin), it was difficult to adjust the level of the tank due to the high viscosity roll, and there was a problem that it took a long time to set the level of the tank.

Therefore, there is an urgent need to develop a new type of 3D printer for manufacturing a sculpture using a high-viscosity photocurable resin having excellent mechanical properties.

As a related prior document, there is Korean Laid-Open Patent Publication No. 10-2018-0125801 (published on November 28, 2018), and an SLA 3D printer is described in the document.

An object of the present invention is a top-down type 3D model using a high-viscosity photo-curable resin that is designed to prevent defects such as separation or cracks of each molding layer in advance, even if a high-viscosity photo-curable resin is used. It is to provide a printer and a 3D printing sculpture manufacturing method using the same.

A top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention for achieving the above object includes: a storage tank filled with a high-viscosity photocurable resin; A support film seated on the high viscosity photocurable resin filled in the storage tank; Guide rollers respectively mounted to be spaced apart from each other on the support film, so that a part of the support film protrudes downward; A main roller mounted to be spaced apart from each other under the support film, and immersed in a high-viscosity photocurable resin filled in the storage tank; A light source mounted on an upper portion of the support film between the guide rollers, moving together when the guide roller and the main roller are driven, and curing the high-viscosity photocurable resin positioned at the protruding portion of the support film; And mounted so as to be immersed in the high-viscosity photocurable resin filled in the storage tank to vertically reciprocate, and molded from the high-viscosity photo-curable resin cured by a light source that moves together when the guide roller and the main roller are driven under the support film. It characterized in that it comprises a; 3D printing plate portion in which a plurality of molding layers are stacked.

Here, it is preferable that the high-viscosity photocurable resin has a viscosity of 10,000 to 300,000 cps.

As the light source, a micro LED including a substrate and a plurality of LEDs mounted in a matrix form on the substrate is used, and the micro LED is a selective driving method that sequentially drives a plurality of LEDs mounted on the substrate in time series. Light can be irradiated.

The guide roller includes first and second guide rollers spaced apart from each other, and the main roller includes first and second main rollers spaced apart from each other, and when the guide roller and the main roller are driven, the second The first and second guide rollers and the first and second main rollers rotate clockwise or counterclockwise, but both are set to rotate in the same direction.

When the first and second guide rollers and the first and second main rollers rotate clockwise, the first and second guide rollers and the first and second main rollers move in a right direction together with a light source, While curing the high-viscosity photocurable resin positioned at the protruding portion of the support film in a scanning method and molding, each molding layer is removed from the support film in a sliding method, and a plurality of molding layers are laminated on the 3D printing plate.

When the first and second main rollers rotate in a clockwise direction, the first main roller disposed on the left serves as a supply roller that draws and supplies a high-viscosity photocurable resin to a protruding portion of the support film. 1 The second main roller disposed on the right side opposite the main roller serves as a separation roller that pulls and separates the high-viscosity photocurable resin from the protruding portion of the support film to the flat portion of the support film.

On the other hand, when the first and second guide rollers and the first and second main rollers are both rotated counterclockwise, the first and second guide rollers and the first and second main rollers are left with a light source. While moving to, the high viscosity photocurable resin located at the protruding portion of the support film is cured and molded in a scan method, while each molding layer is removed from the support film in a sliding method and a plurality of molding layers are laminated on the 3D printing plate. do.

When the first and second main rollers rotate counterclockwise, the first main roller disposed on the left side pulls and separates the high-viscosity photocurable resin from the protruding portion of the support film to the flat portion of the support film. And the second main roller disposed on the right side opposite the first main roller serves as a supply roller that pulls and supplies a high-viscosity photocurable resin to the protruding portion of the support film.

In order to achieve the above object, the method of manufacturing a 3D printing sculpture using a top-down type 3D printer using a high viscosity photocurable resin according to an embodiment of the present invention includes (a) supplying a high viscosity photocurable resin into the storage tank, Mounting a support film on the upper surface of the high-viscosity photocurable resin; (b) A high-viscosity photo-curable resin that is mounted so as to be immersed in the high-viscosity photocurable resin filled in the storage tank, and is positioned at the protruding portion of the support film by raising the 3D printing plate part located in the lower right side spaced apart from the support film. Aligning to a position corresponding to the; (c) a guide roller mounted on the upper portion of the support film and protruding a portion of the support film downward, and an upper portion overlapping with the 3D printing plate portion by rotating the main roller mounted on the lower portion of the support film in a clockwise direction. Horizontally moving in the right direction so that the protruding portion of the support film is positioned on the support film; (d) By irradiating light from a light source mounted on the support film, the high-viscosity photocurable resin located at the protruding portion of the support film is sequentially cured, while the guide roller and the main roller are horizontally moved to the right to cure. Desorption of the molding layer prepared from the high-viscosity photocurable resin in a sliding manner; And (e) descending the 3D printing plate to separate the detached modeling layer.

After the step (e), (f) raising a 3D printing plate located at a lower left side spaced apart from the support film, and aligning it to a position corresponding to the high viscosity photocurable resin positioned at the protruding portion of the support film; (g) rotating the guide roller and the main roller counterclockwise to move horizontally in the left direction so that the protruding portion of the support film is located on the upper portion overlapping with the 3D printing plate portion; (h) By irradiating light from a light source mounted on the support film, the high-viscosity photocurable resin located on the protruding portion of the support film is sequentially cured, while the guide roller and the main roller are horizontally moved to the left to cure. Desorption of the molding layer prepared from the high-viscosity photocurable resin in a sliding manner; And (i) descending the 3D printing plate to separate the detached modeling layer.

Here, it is preferable to repeat steps (b) to (i) at least two or more times.

A top-down type 3D printer using a high-viscosity photocurable resin according to the present invention and a method for manufacturing a 3D printing sculpture using the same include a light source and a light source when driving a guide roller and a main roller to stack a plurality of modeling layers on the 3D printing plate. By reciprocating together in the horizontal direction, each molding layer molded from the high-viscosity photocurable resin cured by the light source mounted on the upper part of the support film is detached and separated while moving in the horizontal direction by the guide roller and the main roller.

In particular, a top-down type 3D printer using a high-viscosity photocurable resin according to the present invention, and a method for manufacturing a 3D printing sculpture using the same, irradiate light from a light source mounted on the support film to provide a high-viscosity photocurable located at the protruding portion of the support film. While sequentially curing the resin, the modeling layer made from the cured high viscosity photocurable resin is removed in a sliding manner by reciprocating the guide roller and the main roller in the horizontal direction.

As described above, in the top-down type 3D printer using a high viscosity photocurable resin according to the present invention and a method for manufacturing a 3D printing sculpture using the same, the model layer is not removed at once by raising the 3D printing plate part in the vertical direction. , The guide roller and the main roller are reciprocated in a horizontal direction and physically separated little by little while separating each modeling layer.

As a result, the top-down type 3D printer using a high viscosity photocurable resin according to the present invention and a method for manufacturing a 3D printing sculpture using the same, despite the plurality of molding layers laminated on the 3D printing plate are made of a high viscosity photocurable resin, Since each modeling layer is separated in a time series by a sliding method, it is easy to separate it, and it is possible to prevent defects such as cracks in each modeling layer from being separated and separated, thereby securing excellent mechanical properties. It can become possible to do.

In addition, the top-down type 3D printer using a high-viscosity photo-curable resin according to the present invention and a method for manufacturing a 3D printing sculpture using the same include a high-viscosity photo-curable disposed in the molding area when the top-down type is formed using a high-viscosity photo-curable resin. Since the resin has a structure in which there is no fear that the resin will be exposed to the air by the support film and the guide roller, it is possible to greatly improve the mechanical properties of a plurality of molding layers molded from a high viscosity photocurable resin cured by a light source.

In addition, a top-down type 3D printer using a high-viscosity photocurable resin according to the present invention and a method for manufacturing a 3D printing sculpture using the same include controlling the separation distance between the 3D printing plate unit and the support film by reciprocating the 3D printing plate unit in the vertical direction. As a result, the level with the high-viscosity photocurable resin disposed in the molding area can be kept constant, so whenever a plurality of molding layers are made one by one, the storage tank descends in the vertical direction by the thickness of the layer and is placed on the cured top surface. Since there is no need to go through recoating (the process of covering the photocurable resin) again, there is no need for working time to adjust the level of the storage tank, and thus there is an effect that the process yield can be greatly improved.

1 is a cross-sectional view showing a top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention.
2 is a plan view showing a top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention.
Figure 3 is a cross-sectional view showing in detail the 3D printing plate of Figure 1;
4 is an enlarged cross-sectional view of the light source of FIG. 1.
5 and 6 are schematic diagrams for explaining the operating principle of a top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention.
7 to 11 are process schematic diagrams showing a method of manufacturing a 3D printing sculpture using a top-down type 3D printer according to an embodiment of the present invention.

Advantages and features of the present invention, and a method of achieving them will become apparent with reference to the embodiments described later in detail together 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, only this embodiment is intended to complete the disclosure of the present invention, and the general knowledge in the technical field to which the present invention pertains. It is provided to completely inform the scope of the invention to the possessor, and the invention is only defined by the scope of the claims. The same reference numerals refer to the same elements throughout the specification.

Hereinafter, a top-down type 3D printer using a high-viscosity photocurable resin according to a preferred embodiment of the present invention and a method of manufacturing a 3D printing sculpture using the same will be described in detail below with reference to the accompanying drawings.

1 is a cross-sectional view showing a top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention, and FIG. 2 is a top-down type 3D printer using a high-viscosity photo-curable resin according to an embodiment of the present invention. It is a plan view shown. In addition, FIG. 3 is a cross-sectional view illustrating a 3D printing plate of FIG. 1 in detail, and FIG. 4 is an enlarged cross-sectional view of the light source of FIG. 1.

1 to 4, a top-down type 3D printer 100 using a high-viscosity photocurable resin according to an embodiment of the present invention includes a storage tank 110, a support film 120, a guide roller 130, It includes a main roller 140, a light source 150, and a 3D printing plate unit 160.

The storage tank 110 provides a space for mounting the support film 120, the guide roller 130, the main roller 140, and the light source 150. The inside of the storage tank 110 is filled with a high-viscosity photocurable resin 10. At this time, the storage tank 110 may have a hexahedral shape, but this is exemplary and may have various shapes. The storage tank 110 may be formed of a transparent material, but is not limited thereto.

The support film 120 is mounted on the high viscosity photocurable resin 10 filled in the storage tank 110. Here, the high-viscosity photocurable resin 10 may have a viscosity of 10,000 to 400,000 cps, and a more preferable range may be 100,000 to 300,000 cps. When a plurality of molding layers 20 are formed by molding using such a high-viscosity photocurable resin 10, mechanical properties such as strength and stiffness can be greatly improved.

The support film 120 is preferably made of a transparent material having excellent strength and stiffness while allowing light irradiated from the light source 150 to pass easily. To this end, the support film 120 may be selected from a PI film (polyimide film), a PET film (polyethylene terephthalate film), a PES film (polyether sulfone film), a PC film (polycarbonate), or the like. More specifically, it is preferable to use a PI film having a thickness of 100 μm or less as the support film 120, which should have a thickness of 100 μm or less to ensure high transmittance and sufficient durability. Because.

The guide rollers 130 are mounted so as to be spaced apart from each other on the upper part of the support film 120, so that a part of the support film 120 protrudes downward.

To this end, the guide roller 130 includes first and second guide rollers 132 and 134 spaced apart from each other with the light source 150 therebetween.

The first and second guide rollers 132 and 134 are arranged to be in contact with one side of the support film 120 and one portion of the other side, so that a portion of the support film 120 protrudes in the downward direction, so that a high-viscosity photocurable resin (10) will provide an area for sculpting.

Although not shown in detail in the drawings, the first and second guide rollers 132 and 134 may be mounted on a first transfer rail (not shown) respectively installed at both edges. Accordingly, when the first and second guide rollers 132 and 134 rotate in the clockwise direction, they move horizontally in the right direction, and when the first and second guide rollers 132 and 134 rotate in the counterclockwise direction. There is a horizontal movement in the left direction.

In this case, the first and second guide rollers 132 and 134 may be set to rotate in the same direction, but are not limited thereto. That is, the first guide roller 132 may rotate in a clockwise direction, and the second guide roller 134 may rotate in a counterclockwise direction opposite to the clockwise direction.

The main rollers 140 are mounted to be spaced apart from each other under the support film 120 and immersed in the high viscosity photocurable resin 10 filled in the storage tank 110.

The main roller 140 serves to supply and separate the high-viscosity photocurable resin 10 to the protruding portion of the support film 120 by the guide roller 130.

To this end, the main roller 140 includes first and second main rollers 142 and 144 spaced apart from each other on the outside of the guide roller 130.

Although not shown in detail in the drawings, the first and second main rollers 142 and 144 may be mounted on second transfer rails (not shown) respectively installed at both edges. Accordingly, when the first and second main rollers 142 and 144 rotate clockwise, they move horizontally to the right, and when the first and second main rollers 142 and 144 rotate counterclockwise, There is a horizontal movement in the left direction.

In this case, the first and second main rollers 142 and 144 may be set to rotate in the same direction, but are not limited thereto. That is, the first main roller 142 may rotate in a clockwise direction, and the second main roller 144 may rotate in a counterclockwise direction opposite to the clockwise direction.

However, in the present invention, when the guide roller 130 and the main roller 140 are driven, the first and second guide rollers 132 and 134 and the first and second main rollers 142 and 144 are clockwise or It rotates in a counterclockwise direction, but it is more preferable that all are set to rotate in the same direction.

The light source 150 is mounted on the top of the support film 120 between the guide rollers 130, and moves together when the guide roller 130 and the main roller 140 are driven, and is located at the protruding portion of the support film 120. It serves to cure the high-viscosity photocurable resin (10).

That is, the light source 150 of the present invention irradiates light from the upper portion of the support film 120 to the lower direction of the support film 120, so that the high-viscosity photocurable resin 10 located under the support film 120 Will harden.

An ultraviolet light source that scans ultraviolet rays may be used as the light source 150. That is, the light source 150 may include any one of a laser, an LCD panel, a projector, and a micro LED, of which it is more preferable to use a micro LED.

The micro LED 150 includes a substrate 152 and a plurality of LEDs 154 mounted on the substrate 152 in a matrix form. The micro LED 150 may irradiate light in a batch driving method that simultaneously irradiates a plurality of LEDs 154 mounted on the substrate 152. Alternatively, the micro LED 150 may irradiate light in a selective driving method that sequentially drives a plurality of LEDs 154 mounted on the substrate 152 in time series, and the selective driving method is more effective in terms of light efficiency. desirable.

The 3D printing plate unit 160 is mounted so as to be immersed in the high-viscosity photocurable resin 10 filled in the storage tank 110 and performs vertical reciprocating motion. This 3D printing plate unit 160 is from the high viscosity photocurable resin 10 cured by the light source 150 moving together when the guide roller 130 and the main roller 140 are driven under the support film 120. A plurality of molding layers 20 to be molded are stacked.

In this way, in the top-down type 3D printer 100 using a high viscosity photocurable resin according to the present invention, the support film 120 is mounted on the high viscosity photocurable resin 10 filled in the storage tank 110, The support film 120 is positioned in a state in which a certain pressure is applied in a form in which a part of the support film 120 protrudes in the downward direction by the guide roller 130.

Accordingly, the top-down type 3D printer 100 using a high-viscosity photo-curable resin according to the present invention is a high-viscosity photo-curable resin disposed in the molding area when molding in a top-down type using the high-viscosity photo-curable resin 10. Since (10) is a structure that is not exposed to air by the support film 120 and the guide roller 130, a plurality of molding layers molded from the high viscosity photocurable resin 10 cured by the light source 150 ( The mechanical properties for 20) can be greatly improved.

In this case, FIG. 1 shows an example in which a plurality of shaping layers 20, that is, first, second, and third shaping layers 21, 22, and 23, are formed on the lower surface of the 3D printing plate unit 160.

This 3D printing plate unit 160 includes a plate unit 162, a driving unit 164 and a control unit 166.

The plate unit 162 is laminated with a plurality of molding layers 20 molded from a high-viscosity photocurable resin 10 cured by a light source 150 that moves together when the guide roller 130 and the main roller 140 are driven. do.

The drive unit 164 is mounted to be coupled to the upper portion of the plate unit 162 and serves to vertically reciprocate the plate unit 162 up and down.

The control unit 166 serves to control the driving of the drive unit 162.

At this time, the driving unit 164 provides power to move the plate unit 162 up and down under the control of the control unit 166. The drive unit 164 may be any one of hydraulic, pneumatic, and electric actuators, but is not limited thereto.

As described above, when the top-down type 3D printer 100 using a high-viscosity photocurable resin according to the present invention is molded in a top-down manner using the high-viscosity photo-curable resin 10, The 3D printing plate unit 160 immersed in the high-viscosity photocurable resin 10 filled to the height can maintain a constant level with the high-viscosity photocurable resin 10 located in the molding area in a vertical reciprocating manner.

Accordingly, the top-down type 3D printer 100 using a high-viscosity photocurable resin according to the present invention moves the 3D printing plate unit 160 in a vertical direction to reciprocate the 3D printing plate unit 160 and the support film 120. By controlling the separation distance between them, the level with the high-viscosity photocurable resin 10 disposed in the molding area can be kept constant, so that each time the plurality of molding layers 20 are made one by one, the storage tank 110 As there is no need to descend in the vertical direction by the thickness of the layer and undergo recoating (the process of covering the photocurable resin) on the cured top surface, there is no need for work time to adjust the level of the storage tank 210, thus increasing the process yield. There is an effect that can be improved.

5 and 6 are schematic diagrams for explaining the operating principle of a top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention, and will be described in more detail with reference to this.

First, FIG. 5 shows a process in which both the first and second guide rollers 132 and 134 and the first and second main rollers 142 and 144 rotate clockwise.

In this way, when all of the first and second guide rollers 132 and 134 and the first and second main rollers 142 and 144 rotate clockwise, the first and second guide rollers 132 and 134 and The first and second main rollers 142 and 144 move in the right direction together with the light source 150. Thereafter, the high-viscosity photocurable resin 10 located at the protruding portion of the support film 120 is cured and molded in a scan method, while each modeling layer 20 is removed from the support film 120 in a sliding method, and a 3D printing plate A plurality of shaping layers 20 are stacked on the portion 160.

Here, when the first and second main rollers 142 and 144 rotate in the clockwise direction, the first main roller 142 disposed on the left side supports the high-viscosity photocurable resin 10 at the protruding portion of the support film 120 It plays the role of a feed roller that is pulled down and fed.

In addition, the second main roller 144 disposed on the right side opposite the first main roller 142 transfers the high-viscosity photocurable resin 10 from the protruding portion of the support film 120 to the flat portion of the support film 120. It acts as a separation roller that pulls up and separates it.

In FIG. 5, reference numeral F denotes a state in which light irradiated from the light source 150 mounted on the support film 120 is cured in a scanning manner from the right edge of the protruding portion of the support film 120 toward the left edge. will be.

In addition, FIG. 6 shows a process in which both the first and second guide rollers 132 and 134 and the first and second main rollers 142 and 144 rotate in a counterclockwise direction.

In this way, when both the first and second guide rollers 132 and 134 and the first and second main rollers 142 and 144 rotate counterclockwise, the first and second guide rollers 132 and 134 And the first and second main rollers 142 and 144 move to the left together with the light source 150. Thereafter, the high-viscosity photocurable resin 10 located at the protruding portion of the support film 120 is cured and molded in a scan method, while each modeling layer 20 is removed from the support film 120 in a sliding method, and a 3D printing plate A plurality of shaping layers are stacked on the portion 160.

Here, when the first and second main rollers 142 and 144 rotate in the counterclockwise direction, the first main roller 142 disposed on the left side protrudes the high viscosity photocurable resin 10 from the support film 120 It serves as a separation roller that pulls and separates the support film 120 from the portion to the flat portion of the support film 120.

In addition, the second main roller 144 disposed on the right side opposite the first main roller 142 serves as a supply roller that draws and supplies the high viscosity photocurable resin 10 to the protruding portion of the support film 120. It is done.

The top-down type 3D printer 100 using a high-viscosity photocurable resin according to an embodiment of the present invention watches the first and second guide rollers 132 and 134 and the first and second main rollers 142 and 144. By repeating the process of rotating both in the direction and the process of rotating both in the counterclockwise direction at least two or more times, 3D printing in a manner in which a plurality of modeling layers 20 are stacked one by one on the 3D printing plate unit 160 You will be manufacturing a sculpture.

6, reference numeral F denotes a state in which light irradiated from the light source 150 mounted on the support film 120 is cured from the left edge of the protruding portion of the support film 120 toward the right edge in a scanning manner. will be.

In the top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention described above, when driving the guide roller and the main roller to stack a plurality of modeling layers on the 3D printing plate, the horizontal direction together with the light source By reciprocating motion, each molding layer molded from the high-viscosity photocurable resin cured by the light source mounted on the upper part of the support film is detached and separated while moving in the horizontal direction by the guide roller and the main roller.

In particular, the top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention sequentially cures the high-viscosity photocurable resin located at the protruding portion of the support film by irradiating light from a light source mounted on the upper part of the support film. In the meantime, the modeling layer made from the cured high viscosity photocurable resin is removed in a sliding manner by reciprocating the guide roller and the main roller in a horizontal direction.

As described above, in the top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention, the modeling layer is not removed at one time by raising the 3D printing plate part in the vertical direction, but the guide roller and the main It uses a method of separating each sculptural layer by a sliding method in which the rollers are physically removed little by little while reciprocating in the horizontal direction.

As a result, in the top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention, although the plurality of molding layers laminated on the 3D printing plate are made of a high-viscosity photocurable resin, each molding layer is slid. Since it is separated in a time-sequential manner, it is easy to separate and separate each modeling layer, or it is possible to prevent defects such as cracks from occurring in each modeling layer in advance, so that it is possible to secure excellent mechanical properties. have.

In addition, in the top-down type 3D printer using a high-viscosity photo-curable resin according to an embodiment of the present invention, when molding in a top-down type using a high-viscosity photo-curable resin, a high-viscosity photo-curable resin disposed in the molding area is used as a support film and Since there is no fear of being exposed to the air by the guide roller, it is possible to greatly improve the mechanical properties of a plurality of molding layers molded from a high-viscosity photocurable resin cured by a light source.

In addition, in the top-down type 3D printer using a high-viscosity photocurable resin according to an embodiment of the present invention, by controlling the separation distance between the 3D printing plate portion and the support film by reciprocating the 3D printing plate portion in a vertical direction, Since the level with the high-viscosity photocurable resin placed in the wall can be kept constant, each time a plurality of modeling layers are made one by one, the storage tank descends vertically by the thickness of the layer and recoats the cured top surface again. Since there is no need to go through the process of covering the chemical resin), there is no need for working time to adjust the level of the storage tank, and thus the process yield can be greatly improved.

Hereinafter, a method of manufacturing a 3D printed sculpture using a top-down type 3D printer according to an embodiment of the present invention will be described with reference to the accompanying drawings.

7 to 11 are process schematic diagrams showing a method of manufacturing a 3D printed sculpture using a top-down type 3D printer according to an embodiment of the present invention.

As shown in FIG. 7, after supplying the high viscosity photocurable resin 10 into the storage tank 110, the support film 120 is mounted on the upper surface of the high viscosity photocurable resin 10.

Here, the high-viscosity photocurable resin 10 may have a viscosity of 10,000 to 400,000 cps, and a more preferable range may be 100,000 to 300,000 cps. When a plurality of molding layers 20 are formed by molding using such a high-viscosity photocurable resin 10, mechanical properties such as strength and stiffness can be greatly improved.

The support film 120 is preferably made of a transparent material having excellent strength and stiffness while allowing light irradiated from the light source 150 to pass easily. To this end, the support film 120 may be selected from a PI film (polyimide film), a PET film (polyethylene terephthalate film), a PES film (polyether sulfone film), a PC film (polycarbonate), or the like. More specifically, it is preferable to use a PI film having a thickness of 100 μm or less as the support film 120, which should have a thickness of 100 μm or less to ensure high transmittance and sufficient durability. Because.

Next, it is mounted so as to be immersed in the high viscosity photocurable resin 10 filled in the storage tank 110, and the 3D printing plate unit 160 located in the lower right side spaced apart from the support film 120 is raised to raise the support film. Aligned to a position corresponding to the high-viscosity photocurable resin 10 positioned at the protruding portion of 120.

In this case, FIG. 7 shows an example that a plurality of shaping layers 20, that is, first, second, and third shaping layers 21, 22, and 23, are formed in advance on the upper surface of the 3D printing plate unit 160.

Here, a part of the high-viscosity photocurable resin 10 located under the support film 120 is a molding layer disposed at the top of the plurality of molding layers 20 stacked on the 3D printing plate unit 160, that is, the third molding It is preferable to arrange the positions so as to be disposed on the same line with the upper surface of the layer 23.

Next, the guide roller 130 mounted on the upper part of the support film 120 and protruding a part of the support film 120 in the downward direction, and the main roller 140 mounted under the support film 120 are watched. It is rotated in the direction and horizontally moved in the right direction so that the protruding portion of the support film 120 is positioned on the upper portion overlapping the 3D printing plate unit 160.

Here, the guide roller 130 includes first and second guide rollers 132 and 134 spaced apart from each other with the light source 150 interposed therebetween. The first and second guide rollers 132 and 134 are arranged to be in contact with one side of the support film 120 and one portion of the other side, so that a portion of the support film 120 protrudes in the downward direction, (10) will provide an area for sculpting.

8 and 9, by irradiating light from the light source 150 mounted on the support film 120, the high viscosity photocurable resin 10 located at the protruding portion of the support film 120 is sequentially While curing, the guide roller 130 and the main roller 140 are horizontally moved to the right to detach the modeling layer 20 prepared from the cured high viscosity photocurable resin 10 in a sliding manner.

Here, as the light source 150, an ultraviolet light source that scans ultraviolet rays may be used. That is, the light source 150 may include any one of a laser, an LCD panel, a projector, and a micro LED, of which it is more preferable to use a micro LED.

The micro LED can irradiate light in a batch driving method that simultaneously irradiates a plurality of LEDs mounted on a substrate. Alternatively, the micro LED may irradiate light with a selective driving method in which a plurality of LEDs mounted on a substrate are sequentially driven in time series, and the selective driving method is more preferable in terms of light efficiency.

That is, in the present invention, light is irradiated from the light source 150 mounted on the support film 120 to sequentially cure the high viscosity photocurable resin 10 located at the protruding portion of the support film 120, while the guide The fourth shaping layer 24 manufactured from the cured high viscosity photocurable resin 10 is removed in a sliding manner by horizontally moving the roller 130 and the main roller 140 in the right direction.

As described above, in the present invention, the 3D printing plate unit 160 is not removed at a time in a vertical direction, but the guide roller 130 and the main roller 140 are horizontally moved in the right direction. The fourth shaping layer 24 is separated by a sliding method that physically removes it little by little while making it.

As a result, although the plurality of molding layers 20 stacked on the 3D printing plate unit 160 are made of a high-viscosity photocurable resin 10, the fourth modeling layer 24 is time series in a sliding manner. It is easy to separate from the fourth molding layer 24 because it is separated from the third molding layer 23, and the occurrence of defects such as cracks in the fourth molding layer 24 can be prevented in advance. There will be.

As shown in FIG. 10, the 3D printing plate unit 160 is lowered to separate the detached molding layer, that is, the fourth molding layer 24. Accordingly, the fourth shaping layer 24 is stacked on the third shaping layer 23 formed on the 3D printing plate unit 160.

Here, the first main roller 142 disposed on the left serves as a supply roller that pulls and supplies the high-viscosity photocurable resin 10 to the protruding portion of the support film 120. In addition, the second main roller 144 disposed on the right side opposite the first main roller 142 transfers the high-viscosity photocurable resin 10 from the protruding portion of the support film 120 to the flat portion of the support film 120. It acts as a separation roller that pulls up and separates it.

As shown in FIG. 11, by raising the 3D printing plate unit 160 located in the lower left side spaced apart from the support film 120, the high viscosity photocurable resin 10 located at the protruding portion of the support film 120 and Align to the corresponding position.

Here, a part of the high-viscosity photocurable resin 10 located under the support film 120 is a molding layer disposed at the top of the plurality of molding layers 20 stacked on the 3D printing plate unit 160, that is, the fourth molding It is preferable to arrange the positions so as to be disposed on the same line with the upper surface of the layer 24.

Next, the guide roller 130 and the main roller 140 are rotated counterclockwise to move horizontally in the left direction so that the protruding portion of the support film 120 is located on the upper portion overlapped with the 3D printing plate unit 160. .

Next, while irradiating light from the light source 150 mounted on the support film 120 to sequentially cure the high viscosity photocurable resin 10 located at the protruding portion of the support film 120, the guide roller ( 130) and the main roller 140 are moved horizontally to the left to detach the molding layer 20 prepared from the cured high viscosity photocurable resin 10 in a sliding manner.

Next, the 3D printing plate unit 160 is lowered to separate the detached modeling layer 20, that is, the fifth modeling layer.

Here, the process of forming the fourth shaping layer and the process of forming the fifth shaping layer differ only in that the guide roller 130 and the main roller 140 are rotated clockwise and counterclockwise, respectively, The method of molding the high-viscosity photocurable resin 10 is substantially the same.

That is, in the present invention, the process of rotating both the first and second guide rollers 132 and 134 and the first and second main rollers 142 and 144 in a clockwise direction and a process of rotating both in a counterclockwise direction are at least two. By repeating it more than once, a 3D printed sculpture is manufactured in a manner in which a plurality of modeling layers 20 are stacked one by one on the 3D printing plate unit 160.

Although the above has been described with reference to the embodiments of the present invention, various changes or modifications can be made at the level of those of ordinary skill in the art to which the present invention pertains. Such changes and modifications may be said to belong to the present invention as long as they do not depart from the scope of the technical idea provided by the present invention. Therefore, the scope of the present invention should be determined by the claims set forth below.

100: top-down type 3D printer 110: storage tank
120: support film 130: guide roller
132: first guide roller 134: second guide roller
140: main roller 142: first main roller
144: second main roller 150: light source
160: 3D printing plate unit 162: plate unit
164: drive unit 166: control unit
10: high viscosity photocurable resin 20: plural shaping layers

Claims (11)

A storage tank filled with a high-viscosity photocurable resin;
A support film seated on the high viscosity photocurable resin filled in the storage tank;
Guide rollers respectively mounted to be spaced apart from each other on the support film, so that a part of the support film protrudes downward;
A main roller mounted to be spaced apart from each other under the support film, and immersed in a high-viscosity photocurable resin filled in the storage tank;
A light source mounted on an upper portion of the support film between the guide rollers, moving together when the guide roller and the main roller are driven, and curing the high-viscosity photocurable resin positioned at the protruding portion of the support film; And
It is mounted so as to be immersed in the high-viscosity photocurable resin filled in the storage tank and moves vertically, and is molded from the high-viscosity photocurable resin cured by a light source that moves together when the guide roller and the main roller are driven under the support film. Includes; 3D printing plate portion on which a plurality of shaping layers are stacked,
The high viscosity photocurable resin has a viscosity of 10,000 ~ 300,000 cps,
As the support film, any one of PI film (polyimide film), PET film (polyethylene terephthalate film), PES film (polyether sulfone film), and PC film (polycarbonate) is used, and the support film has a thickness of 100 μm or less. ,
The guide roller includes first and second guide rollers spaced apart from each other, and the main roller includes first and second main rollers spaced apart from each other, and when the guide roller and the main roller are driven, the second The first and second guide rollers and the first and second main rollers rotate clockwise or counterclockwise, but both are set to rotate in the same direction,
When the first and second guide rollers and the first and second main rollers rotate clockwise, the first and second guide rollers and the first and second main rollers move horizontally in the right direction together with the light source. , While molding by curing the high-viscosity photocurable resin positioned on the protruding portion of the support film in a scan method and molding, removing each molding layer from the support film in a sliding method, and laminating a plurality of molding layers on the 3D printing plate,
When the first and second guide rollers and the first and second main rollers are both rotated in a counterclockwise direction, the first and second guide rollers and the first and second main rollers are horizontally left together with a light source. While moving, the high-viscosity photocurable resin located on the protruding portion of the support film is cured and molded in a scan method, while each molding layer is removed from the support film in a sliding method, and a plurality of molding layers are laminated on the 3D printing plate. ,
When the first and second main rollers rotate in a clockwise direction, the first main roller disposed on the left serves as a supply roller that draws and supplies a high-viscosity photocurable resin to a protruding portion of the support film. 1 The second main roller disposed on the right side opposite the main roller serves as a separation roller that pulls and separates the high-viscosity photocurable resin from the protruding part of the support film to the flat part of the support film,
When the first and second main rollers rotate counterclockwise, the first main roller disposed on the left side pulls and separates the high-viscosity photocurable resin from the protruding portion of the support film to the flat portion of the support film. And the second main roller disposed on the right side opposite the first main roller serves as a supply roller that draws and supplies the high-viscosity photo-curable resin to the protruding portion of the support film. Top-down type 3D printer using resin.
delete The method of claim 1,
As the light source, a micro LED including a substrate and a plurality of LEDs mounted in a matrix form on the substrate is used,
The micro LED is a top-down type 3D printer using a high-viscosity photocurable resin, characterized in that it irradiates light in a selective driving method that sequentially drives a plurality of LEDs mounted on a substrate in time series.
delete delete delete delete delete (a) supplying a high-viscosity photocurable resin to the interior of the storage tank, and then mounting a support film on the upper surface of the high-viscosity photocurable resin;
(b) A high-viscosity photo-curable resin that is mounted so as to be immersed in the high-viscosity photocurable resin filled in the storage tank, and is located at the protruding portion of the support film by raising the 3D printing plate part located in the lower right side spaced apart from the support film. Aligning to a position corresponding to the;
(c) a guide roller mounted on the upper portion of the support film and protruding a portion of the support film downward, and an upper portion overlapping with the 3D printing plate portion by rotating the main roller mounted on the lower portion of the support film in a clockwise direction. Horizontally moving in the right direction so that the protruding portion of the support film is positioned on the support film;
(d) By irradiating light from a light source mounted on the support film, the high-viscosity photocurable resin located at the protruding portion of the support film is sequentially cured, while the guide roller and the main roller are horizontally moved to the right to cure. Desorption of the molding layer prepared from the high-viscosity photocurable resin in a sliding manner;
(e) separating the detached modeling layer by lowering the 3D printing plate part;
(f) raising a 3D printing plate located at a lower left side spaced apart from the support film and aligning it to a position corresponding to the high viscosity photocurable resin positioned at the protruding portion of the support film;
(g) rotating the guide roller and the main roller counterclockwise to move horizontally in the left direction so that the protruding portion of the support film is located on the upper portion overlapping the 3D printing plate portion;
(h) By irradiating light from a light source mounted on the support film, the high-viscosity photocurable resin located on the protruding portion of the support film is sequentially cured, while the guide roller and the main roller are horizontally moved to the left to cure. Desorption of the molding layer prepared from the high-viscosity photocurable resin in a sliding manner; And
(i) lowering the 3D printing plate to separate the detached modeling layer; includes,
The high viscosity photocurable resin has a viscosity of 10,000 ~ 300,000 cps,
As the support film, any one of PI film (polyimide film), PET film (polyethylene terephthalate film), PES film (polyether sulfone film), and PC film (polycarbonate) is used, and the support film has a thickness of 100 μm or less. ,
Steps (b) to (i) are repeated at least two or more times,
The guide roller includes first and second guide rollers spaced apart from each other, and the main roller includes first and second main rollers spaced apart from each other, and when the guide roller and the main roller are driven, the second The first and second guide rollers and the first and second main rollers rotate clockwise or counterclockwise, but both are set to rotate in the same direction,
When the first and second main rollers rotate in a clockwise direction, the first main roller disposed on the left serves as a supply roller that draws and supplies a high-viscosity photocurable resin to a protruding portion of the support film. 1 The second main roller disposed on the right side opposite the main roller serves as a separation roller that pulls and separates the high-viscosity photocurable resin from the protruding part of the support film to the flat part of the support film,
When the first and second main rollers rotate counterclockwise, the first main roller disposed on the left side pulls and separates the high-viscosity photocurable resin from the protruding portion of the support film to the flat portion of the support film. And the second main roller disposed on the right side opposite to the first main roller serves as a supply roller that pulls and supplies a high-viscosity photocurable resin to the protruding portion of the support film. 3D printing sculpture manufacturing method using a 3D printer. delete delete

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