TW202108353A - High-speed photocuring 3D printing system and method for enhancing uniformity of ultraviolet of 3D printing system capable of enhancing heat dissipation and improving energy utilization - Google Patents

Abstract

A high-speed photocuring 3D printing system comprises a material tank, a light source module, a dynamic photomask module, a forming platform, a driving module, and a control module. The material tank carries the forming material. The light source module is disposed below the material tank and comprises a plurality of light sources, a light guiding plate, and a reflective plate. The light emitted by the light source enters the light guiding plate and be reflected by the reflective plate and leave the light guiding plate. After passing the dynamic photomask module, the light will irradiate the forming material in the material tank for curing. The material that has hardened and formed is attached on the forming platform. The driving module enables the forming platform to move along the Z-axis, so the material may be cured and formed layer by layer to form a three-dimensional product.

Description

High-speed light-curing three-dimensional printing system and method for improving ultraviolet light uniformity of three-dimensional printing system

The present invention relates to a three-dimensional printing system and a method for improving the uniformity of exposure light of the three-dimensional printing system, in particular to a high-speed light-curing three-dimensional printing system using an ultraviolet plane light source and a method for improving the ultraviolet of the three-dimensional printing system Method of light uniformity.

In recent years, the development of 3D printing technology has become increasingly mature, and it occupies an extremely important position in the production and development stage, and is widely used in aerospace parts, automobiles, medical engineering and other mechanical industries. Compared with traditional processing technology, 3D printing technology has the advantages of easier automation, lightweight products, customization, and diversified materials.

The basic principle of three-dimensional printing is the layer-by-layer processing technology of stacking materials layer by layer, dividing the three-dimensional object into a plurality of two-dimensional planar patterns, and stacking the planar patterns, and the processing is divided into Z Axis (upper and lower moving layer thickness setting and XY axis (XY plane movement) printing accuracy. Three-dimensional printing has the following advantages. The traditional removal or deformation of materials by mechanical force is called removal processing, three-dimensional Printing is incremental processing, which can save material usage and waste generation; three-dimensional printing can complete complex curved surfaces that cannot be produced by traditional processing, and the mechanisms that need to be disassembled and assembled can be made into one-piece manufacturing, which improves the strength of the workpiece and the process time .3D printing is very helpful for a small number of diversified needs. It is suitable for customized items and is widely used in consumer products such as automobiles, aerospace, molds, medical materials, jewelry, art, and people's livelihood.

According to the specifications of the American Society for Testing and Materials, the multilayer manufacturing technology is divided into seven categories. That is, material extrusion technology, material injection technology, sheet lamination technology, adhesive spraying technology, powder bed melting technology, directed energy deposition technology, and photopolymerization curing technology. The photopolymerization curing technology can be divided into three-dimensional lithography technology and digital light processing technology. Among them, the digital light processing technology is mainly to irradiate ultraviolet light to the photocurable resin to cause the resin to polymerize and cure. The cured resin will adhere to the molding platform to form a layer of pattern, and then the molding platform is raised and lowered. The formation of the pattern of the next layer.

There are two ways of digital light processing technology. The first is to use traditional physical masks to define patterns, but this method requires multiple masks to correspond to multiple layers of patterns. The second is to use a non-mask system, that is, a dynamic mask system, which uses the concept of a display to digitize the pattern. The dynamic mask system can be divided into a transmissive liquid crystal display device and a reflective digital micromirror device to generate patterns of each layer.

In the existing liquid crystal display type dynamic mask system, the light source mainly uses an array of ultraviolet light sources with a lens array. However, in this structure, because each ultraviolet light source is close to the molding platform, the light emitted by each ultraviolet light source does not diffuse enough to irradiate the resin, so it is easy to have the problem of uneven light intensity on the same surface. In addition, since the array of the ultraviolet light source is directly arranged in the machine, the ultraviolet light source often emits a relatively large amount of heat, and the machine needs to be equipped with a heat dissipation mechanism for heat dissipation.

In view of this, the present invention provides a high-speed light-curing three-dimensional printing system, which uses a light guide plate to arrange the ultraviolet light source on the side of the light guide plate, and then uses the refraction and total reflection characteristics of the light guide plate to match the reflector plate. The light incident from the side can be emitted from the upper surface, and the diffuser is used to homogenize the light to form a surface light source, or the ultraviolet light source is directly set under the diffuser without using a light guide plate, and the reflector is used The ultraviolet light emitted by the light source is reflected and passed through the diffuser, and then the light is guided by the brightening plate to emit the light forward to increase the intensity of the light when it is irradiated to the resin. In this way, compared with the prior art array type ultraviolet light source, fewer light sources can be used to achieve the same effect, and since the light source module of the present invention is a surface light source that can generate uniform light, it can shorten the gap between the material and the material slot. The distance between. In addition, since the light source can enter the light from the side of the light guide plate, the light source can be arranged on both sides of the machine, and it is not necessary to install the array light source inside the machine as in the prior art, which can solve the problem of heat dissipation of the machine.

An embodiment of the high-speed light-curing three-dimensional printing system of the present invention includes a material tank, a light source module, a dynamic mask module, a molding platform, a driving module, and a control module. The material tank includes a bottom wall and a peripheral wall, the bottom wall is connected to the peripheral wall to form an accommodating space, the molding material is contained in the accommodating space, and the bottom wall includes a light-transmitting member. The light source module is arranged under the material groove, the light emitted by the light source module passes through the light-transmitting part and irradiates the molding material, wherein the light source module includes a plurality of light sources, a light guide plate and a reflection plate, The light guide plate has an upper surface, a lower surface, and a plurality of side surfaces. The side surfaces are adjacent to the upper surface and the lower surface. The upper surface corresponds to the light-transmitting member. The reflecting plate is disposed on the lower surface. The light source is arranged on at least one of the side surfaces, and the light emitted by the light sources enters the light guide plate through the side surfaces, is reflected by the reflective plate, and exits the light guide plate through the upper surface. The dynamic mask module is arranged between the material slot and the light source module, and dynamically generates a plurality of mask patterns, each of the mask patterns includes a light-shielding part and a light-transmitting part, and the light-guide plate emits light The light passes through the dynamic mask module and irradiates the molding material in the material groove through the light-transmitting member. The molding platform is set above the material tank and can move in a first direction to approach or move away from the material tank. The molding material cured by the light irradiation is attached to the molding platform. By the movement of the molding platform, The solidified molding material can be laminated on the molding platform layer by layer. The driving module is connected to the forming platform, and the driving module drives the forming platform to move along the first direction. The control module is electrically connected to the light source module and the drive module, and controls the light emission of the light source module and the drive module drives the molding platform to move.

Please refer to FIG. 1 and FIG. 2, which show an embodiment of the high-speed light-curing three-dimensional printing system of the present invention. The high-speed light-curing three-dimensional printing system 100 of the present invention includes a material tank 10, a light source module 20, a dynamic mask module 30, a forming platform 40, a driving module 50 and a control module 60. The high-speed light-curing three-dimensional printing system 100 of the present invention irradiates light with a specific wavelength range through the mask pattern generated by the dynamic mask module 30 to the molding material to cure the molding material. The structure of each element is described below.

The material tank 10 is used to hold the molding material M for three-dimensional printing. The material tank 10 includes a bottom wall 11 and a peripheral wall 12. The bottom wall 11 is joined to the peripheral wall 12 to form an accommodating space S for molding three-dimensional printing. The material M is contained in the accommodating space S. In this embodiment, the material tank 10 is rectangular, and the liquid resin as the molding material M is contained in the accommodating space S of the material tank 10. Since the three-dimensional printing system of the present invention is a light-curing three-dimensional printing system, the resin as the molding material must be cured and molded after being irradiated with light (such as ultraviolet light). Therefore, a light-transmitting member 13 is provided on the bottom wall 11, and the light-transmitting member 13 can be made of glass or plastic material, which can allow light from the light source module 20 below to penetrate and irradiate the molding material in the material tank 10. In this embodiment, the molding material is a light-curing resin, such as a visible light resin produced by Taike 3D Technology Co., Ltd.

Please refer to FIG. 2, the light source module 20 of the high-speed light-curing three-dimensional printing system 100 of the present invention includes a plurality of light sources 21, a light guide plate 22, a reflection plate 23, a diffusion plate 24, and a brightness enhancement plate 25. In the embodiment, the light guide plate 22 is a rectangular transparent plate, which includes an upper surface 221, a lower surface 222, and four side surfaces 223. The upper surface 221 and the lower surface 222 are disposed oppositely, and the side surfaces 223 are adjacent to the upper surface 221 and the lower surface. Surface 222. The light source 21 is disposed on the side surface 223, the reflecting plate 23 is disposed on the lower surface 222, the diffuser plate 23 is disposed above the upper surface at a predetermined distance, and the brightness enhancement plate 25 is disposed above the diffuser plate 24.

The light emitted by the light source 21 enters the light guide plate 22 from the side 223 at different incident angles. Part of the light incident on the light guide plate 22 is irradiated on the upper surface 221 and then is totally reflected, so that the light travels toward the lower surface 222, and the other part is incident on the light guide plate 22. The light rays directly travel toward the lower surface 222, and the light rays traveling to the lower surface 222 are all reflected by the reflector 23, pass through the upper surface 221, and exit the light guide plate 22. The light after exiting the light guide plate 22 passes through the diffuser 24 to become uniform light with substantially equal intensity in all directions. A plurality of light diffusion structures are formed in the diffuser 24. For example, a plurality of particles are arranged in the main body of the diffuser 24. The light can be uniformized in all directions through the scattering of particles. After the uniform light passes through the brightness enhancement plate 25, the microscopic structure 251 on the brightness enhancement plate 25 can make the light traveling toward both sides converge directly upward due to the change in the angle of refraction when the light passes through different media. Increasing the brightness directly above can reduce the loss of light and reduce the number of light sources 21 used.

As shown in FIG. 3, the light incident on the microstructure 251 on the brightness enhancement plate 25 can have the following three situations. As shown in the leftmost microscopic structure 251 in FIG. 3, when the incident angle of the light is greater than or equal to the incident angle of total reflection, the light will be totally reflected twice by the microscopic structure 251 and reflected back to the diffuser 24 again. Employed; as shown in the micro-ribbed structure 251 in the middle of Figure 3, the light is refracted by the micro-ribbed structure 251 and concentrated in ^{the range of ±35 o} with the center line directly above, so that the The light intensity is increased by 40% to 70%; in addition, as shown in the microscopic structure 251 on the right of FIG. 3, the light will be totally reflected by the microscopic structure 251, and then exit from the other side of the microscopic structure 251 toward It travels from the side to enter another adjacent microstructure 251 to be refracted or totally reflected.

In addition, in order to increase the uniformity of the light emitted from the light guide plate 22, a plurality of scattering structures 224 can be formed on the lower surface 222 of the light guide plate 22. These scattering structures 224 can be printed on the lower surface 222 by printing a large number of tiny Screen dots, when light is irradiated on the lower surface 222, the dots can scatter the light, or form microstructures such as tiny protrusions on the lower surface 222 of the light guide plate 22, so that after reflecting to the upper surface 221, the incident angle is greater than the total reflection Angle and make light exit the light guide plate 22'.

As shown in FIG. 4, in addition to the edge-lit structure of the light source module 20 of the above embodiment, in another embodiment, the light source 21 can also be directly disposed under the diffuser plate 24 without using a light guide plate to form a direct downward The structure of the light source of this type, and other components, such as the brightness enhancement plate 25, are the same as those of the side-light type.

In this embodiment, the light source 21 is an ultraviolet light source, such as an ultraviolet light emitting diode, such as a light emitting diode (Nichia, NVSU279AT) emitting a wavelength of 405 nm. In this embodiment, a plurality of light sources 21 are arranged on a substrate (such as a circuit board) to form a light source bar. For example, a single-row light source bar has 36 ultraviolet light emitting diodes closely attached, and 6 light emitting diodes. The diodes are a group, connected in parallel. In this embodiment, the plurality of light sources 21 form two light source bars, and the two light source bars are respectively disposed on two opposite side surfaces 223 of the light guide plate 22. Therefore, the light emitted by each light source 21 can enter the light guide plate 22 through the two opposite side surfaces 223 of the light guide plate 22.

The dynamic mask module 30 is disposed between the light source module 20 and the material tank 10. The dynamic mask module 30 dynamically generates a plurality of mask patterns in sequence, and each mask pattern corresponds to each layer of 3D printing (multilayer manufacturing), and can correspond to the process of each layer in the 3D printing process. And replace with a different mask pattern. Each mask pattern includes a light-shielding part and a light-transmitting part. After the light from the light source module 20 passes through the mask pattern of the dynamic mask module 30, it is irradiated to the molding material in the material tank 10 to form the preset layer Structure. In this embodiment, the dynamic mask module 30 is a liquid crystal display panel, such as a 6-inch liquid crystal display panel of LS060R1SX01 produced by Sharp. The dynamic mask module 30 can be closely attached to the light source module 20 by gluing.

The forming platform 40 is arranged above the material tank 10 and can move in a first direction to approach or move away from the material tank 10. In this embodiment, the first direction is the Z-axis direction. The light from the light-emitting module 20 passes through the dynamic mask module 30 and irradiates the molding material in the material tank 10 to be cured, and the cured molding material is attached to the molding platform 40. The molding platform 40 is first lowered to a reference point, and then the light from the light-emitting module 20 passes through the dynamic mask module 30 and then irradiates the molding material at the reference point (a distance from the bottom of the material tank 10 by one exposure layer). After the molding material of one layer is solidified and attached to the molding platform 40, the molding platform 40 rises, so that the molding material in the material tank 10 completely reflows to the material depletion area formed by the solidification of the previous layer, and then the molding platform 40 drops again to the solidified layer and The bottom of the material tank 10 is separated by a distance of the exposure layer, and then the curing process of the next layer is carried out. The cured molding material of the next layer is attached to the cured molding material of the previous layer, and the curing process is repeated to form a product with a three-dimensional structure.

The lifting of the forming platform 40 is realized by the driving module 50. Please refer to FIG. 4, the driving module 50 drives the molding platform 40 to move along the above-mentioned first direction. In this embodiment, the driving module 50 includes a column 51, a motor 52, a guide rail 53, a timing belt 54, a driving wheel 55, a driven wheel 56, a sliding block 57 and a cantilever 58. The motor 52 drives the driving wheel 56 to rotate, and the driving wheel 56 drives the driven wheel 56 to rotate via the timing belt 54 to move the slider 55 along the direction guided by the guide rail 53. The cantilever 56 is coupled to the slider 55. The movement of the cantilever 56 can move along the direction of the guide rail 53.

Please refer to FIG. 5. In this embodiment, the molding platform 40 includes a molding plate 41, an inclined member 42, an adapter member 43 and an elongated pad 44. The adapter 43 is combined with the cantilever 56 of the driving module 50, the inclined member 42 has an inclined angle with respect to the horizontal surface, and the forming plate 41 is fixed on the inclined member 42. The molding plate 41 can be an aluminum plate. A rough surface is formed by sandblasting on the surface of the aluminum plate to facilitate the adhesion of the molding material. The inclined member 42 forms an inclined angle with the horizontal plane. This structure facilitates the uncured molding material to be inclined by gravity. The surface flows back to the material tank 10 to prevent the molding material from accumulating on the molding plate 41. In addition, since the adapter 43 combines the tilting piece 42 and the forming plate 41 with the cantilever 56 of the driving module 50, the forming plate 41 can move closer to or away from the slider 55 along the first direction (Z axis) L1. Material tank 10. The elongated spacer 44 is used for the deeper material pool 10 and can increase the distance between the adapter 43 and the forming plate 41. For the material pool 10 with a large depth, the forming plate 41 can also reach the reference point (the distance from the bottom wall 11 of the material pool 10 by an exposure layer).

Please return to FIG. 1, the control module 60 is electrically connected to the light source module 20, the dynamic mask module 30 and the driving module 50. The control module 60 includes a controller 61 and an expansion circuit board 62. The controller 61 can output the above-mentioned mask patterns, and send them to the dynamic mask module 20 through the expansion circuit board 62, and transmit printing parameters and control signals. The light source module 20 is transmitted to the light source module 20 and the driving module through the expansion circuit board 62. During the curing process of each layer, the light source module 20 is controlled to emit light, and the mask pattern is transmitted to the dynamic mask module 20, and the light of the light source module 20 passes through After the mask pattern, the molding material in the material tank 10 is cured to generate a preset pattern. In addition, after each layer is cured, during the process of ascending and descending to the reference point of the forming platform 40, the light emission of the light source module 20 is turned off to reduce the heat generation of the light source. In this embodiment, the controller 61 uses a Raspberry Pi motherboard.

Please refer to FIG. 6, which shows the process of manufacturing a three-dimensional structure product of the high-speed light-curing three-dimensional printing system 100 of the present invention.

First, in step S1, first obtain a three-dimensional drawing file, which can be obtained by using CAD software, etc., and converted into a triangular mesh file in STL format. Then go to step S2.

In step S2, specific software is used to slice the three-dimensional image file to generate a two-dimensional image file. For example, use Autodesk's Netfabb software or Uxprint software developed in cooperation with Sun Yat-Sen University for layering. Then go to step S3.

In step S3, the sliced two-dimensional image file is loaded into the controller 51. Then go to step S4.

In step S4, the mobile device T is connected to the controller 61 (as shown in FIG. 1). For example, the mobile device T and the controller 61 are connected using the Bluetooth communication protocol. Then go to step S5.

In step S5, printing parameters such as the exposure time and the movement distance of the forming platform are input into the controller 51 from the mobile device, and the two-dimensional image file to be printed is selected. Then go to step S6.

In step S6, the exposure printing is started, the light source module 20 is activated, and the image is transmitted to the dynamic mask module 30. Then go to step S7.

In step S7, the forming platform 40 rises and then descends to the reference point (a distance of one exposure layer from the bottom wall 11 of the material tank 10), and then the light emitted by the light source module 20 is irradiated to the reference point through the dynamic mask module 30 The molding material at the position is solidified and molded and attached to the molding platform 40. Then go to step S8.

In step S8, it is judged whether the current molder is the last layer, if the judgment result is yes, go to step S9; if the judgment result is no, go to step S5.

In step S9, the 3D printing process is ended.

The high-speed light curing three-dimensional printing system of the present invention uses a light source module that generates a surface light source. Since the light source module is arranged on both sides, the entire light source module can be miniaturized. In this embodiment, the overall thickness of the light source module is It is less than 1 cm, and the surface of the machine is easy to replace, and because the light source is located on both sides of the light source module, the heat emitted by the light source is easily dissipated by the heat dissipation mechanism (fins) etc. from both sides. Compared with the prior art light source array, it is not easy to replace because it shoots to the center of the mechanism, and because the light source and the material pool must be kept at a considerable distance, the light emitted by the light source can diffuse enough to make the light intensity more uniform. The volume of the overall equipment becomes larger.

In addition, the high-speed light-curing three-dimensional printing system 100 of the present invention also improves the energy usage rate. Using the prior art commercial machine and the high-speed light-curing three-dimensional printing system of the present invention, when 24W energy is provided, the light intensity of the commercial machine penetrating the LCD panel is up to 2.94mW/cm ² . The light intensity of the light-emitting module with the light guide plate of the present invention is up to 3.4 mW/cm ² , and the light energy is increased by about 14% when the same energy is provided.

In addition, the following Table 1 and Table 2 respectively show the data on the light uniformity of a commercially available machine (Phrozen shuffle machine) based on the prior art and the high-speed light-curing 3D printing system of the present invention. The horizontal and vertical directions in Table 1 and Table 2 respectively represent the coordinate values of the grid points divided along the X-axis and Y-axis of the test piece. The data in the table represents the resin curing thickness (light penetration depth) of each grid point. By comparing the difference in the curing thickness of the resin at each grid point, we can see the uniformity of light. The greater the difference in the curing thickness of the resin, the greater the difference in the light intensity received by each grid point, that is, the poorer light uniformity. The uniformity is defined as = (Shallowest penetration depth/ Deepest penetration depth)×100%. It can be seen from the data disclosed in Table 1 and Table 2 that under the same exposure conditions of 10 seconds, the light uniformity of a commercially available machine based on the prior art is 54.1%. The high-speed light-curing three-dimensional printing of the present invention The light uniformity of the machine of the system is 62.5%. Table 1 1 2 3 4 5 6 7 8 9 10 1 190 200 200 200 200 190 200 190 180 140 2 210 230 250 230 240 230 240 220 220 190 3 210 240 220 250 220 240 230 240 190 200 4 210 210 220 210 220 190 210 190 200 130 Table 2 1 2 3 4 5 6 7 8 9 10 1 180 185 180 180 175 180 185 180 190 175 2 200 215 230 230 230 225 220 205 195 175 3 195 220 230 235 240 240 220 205 185 170 4 180 200 210 210 215 215 205 200 175 150

However, the above are only preferred embodiments of the present invention, and should not be used to limit the scope of implementation of the present invention, that is, simple equivalent changes and modifications made in accordance with the scope of the patent application of the present invention and the description of the invention, All are still within the scope of the invention patent.

10: Material tank 11: bottom wall 12: Zhou wall 13: Translucent parts 20: Light source module 21: light source 22: Light guide plate 23: reflector 24: diffuser 25: Brightness enhancement board 30: Dynamic mask module 40: Forming platform 41: forming board 42: Tilting piece 43: Adapter 44: Lengthened pad 50: drive module 51: Column 52: Motor 53: Rail 54: Timing belt 55: driving wheel 56: driven wheel 57: Slider 58: Cantilever 60: control module 61: Controller 62: Expansion circuit board 100: High-speed light-curing 3D printing system 221: upper surface 222: lower surface 223: side 224: Scattering structure 251: Microstructure L1: first direction M: molding material S: accommodating space T: mobile device

FIG. 1 is a perspective view of an embodiment of the high-speed light-curing three-dimensional printing system of the present invention. FIG. 2 is a schematic diagram of the light source module and the dynamic mask module of the high-speed light curing three-dimensional printing system of FIG. 1. FIG. 3 is a schematic diagram of the brightness enhancement plate of the light source module of FIG. 2. 4 is a schematic diagram of another embodiment of the light source module of the high-speed light curing three-dimensional printing system of the present invention. FIG. 5 is a three-dimensional exploded view of the molding platform and driving module of the high-speed light-curing three-dimensional printing system of FIG. 1. FIG. Fig. 6 is a flow chart of the multilayer manufacturing of the high-speed light-curing three-dimensional printing system of the present invention.

10: Material tank

11: bottom wall

12: Zhou wall

13: Translucent parts

20: Light source module

30: Dynamic mask module

40: Forming platform

50: drive module

60: control module

61: Controller

62: Expansion circuit board

100: High-speed light-curing 3D printing system

L1: first direction

M: molding material

S: accommodating space

T: mobile device

Claims (10)

A high-speed light-curing three-dimensional printing system, which includes: A material tank, which includes a bottom wall and a peripheral wall, the bottom wall is connected to the peripheral wall to form an accommodating space, the molding material is contained in the accommodating space, and the bottom wall includes a light-transmitting member; A light source module, which is arranged under the material groove, the light emitted by the light source module passes through the light-transmitting member and irradiates the molding material, wherein the light source module includes a plurality of light sources, a diffusion plate and a reflector The light emitted by the light sources is reflected by the reflector and then passes through the diffuser to form a uniform light; A dynamic mask module is arranged between the material slot and the light source module and dynamically generates a plurality of mask patterns. The light emitted from the light guide plate passes through the dynamic mask module and then passes through the transparent The light part irradiates the molding material in the material groove; A molding platform is set above the material tank and can move in a first direction to approach or move away from the material tank. The molding material cured by the light irradiation is attached to the molding platform by the movement of the molding platform , The solidified molding material can be layered on the molding platform layer by layer; A drive module connected to the forming platform, the drive module driving the forming platform to move along the first direction; and A control module electrically connected to the light source module, the dynamic mask module and the driving module to control the light emission of the light source module, the dynamic mask module to generate the light patterns and the driving module The group drives the forming platform to move. The high-speed light-curing three-dimensional printing system according to claim 1, wherein the light source module further includes a light guide plate having an upper surface, a lower surface and a plurality of side surfaces, the side surfaces being adjacent to the upper surface And the lower surface, the upper surface corresponds to the light-transmitting member, the reflecting plate is disposed on the lower surface, the light sources are adjacent to at least one of the side surfaces, and the light emitted by the light sources passes through the side surfaces The light guide plate enters the light guide plate, and is reflected by the reflector plate, and then exits the light guide plate through the upper surface. The high-speed light-curing three-dimensional printing system according to claim 2, wherein a plurality of scattering structures are formed on the lower surface of the light guide plate, so that the light entering the light guide plate is scattered by the scattering structures. The high-speed light-curing three-dimensional printing system according to claim 1, wherein the light source module further includes a brightness enhancement plate, which is arranged above the diffusion plate, and the uniform light passes through the brightness enhancement plate to form parallel rays and increase Light intensity, the parallel light passes through the dynamic mask module to form the pattern. The high-speed light-curing three-dimensional printing system according to claim 4, wherein the brightness enhancement board includes a plurality of ridge structures, and the uniform light passes through the ridge structures to form the parallel light. The high-speed light-curing three-dimensional printing system according to claim 1, wherein the dynamic mask module includes a liquid crystal display panel. The high-speed light-curing three-dimensional printing system according to claim 1, wherein the light sources are light-emitting diodes that can emit ultraviolet light. The high-speed light-curing three-dimensional printing system according to claim 1, wherein the light sources are arranged on a substrate to form a light source bar, and the light source bars are respectively arranged on two opposite sides of the light guide plate. A method for improving the uniformity of ultraviolet light in a 3D printing system, which includes: A three-dimensional printing system is provided, which includes a material tank, a dynamic mask module, and a molding platform. The material tank contains forming materials, and the dynamic mask module generates a plurality of mask patterns and is arranged in the material tank. Below, the molding platform is provided for the solidification and attachment of the molding material and is set above the material tank; A light source module is provided. The light source module includes a plurality of light sources, a diffuser plate, and a reflector plate. The light sources emit ultraviolet light. The ultraviolet light is directly passed through the diffuser plate or reflected by the reflector plate and then passed through the diffuser plate. Form uniform light; and The light source module is arranged below the dynamic light cover module, so that the ultraviolet light emitted by the light source module passes through the dynamic light cover module to irradiate the material in the material tank. The method for improving the uniformity of ultraviolet light in a three-dimensional printing system according to claim 9, wherein the light source module further includes a light guide plate having an upper surface, a lower surface and a plurality of side surfaces, and the side surfaces are connected The upper surface and the lower surface, the light sources are adjacent to at least one of the side surfaces, the reflecting plate is arranged on the lower surface, the diffuser plate is projected above the upper surface, and the ultraviolet light emitted from the light sources is The side surface enters the light guide plate and is reflected by the reflector plate, then exits the light guide plate through the upper surface, and becomes the uniform light through the diffuser plate.

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