Forming platform assembly for light-cured 3D printing and method of light-cured 3D printing

Abstract

The application discloses a forming platform assembly for photocuring 3D printing and a photocuring 3D printing method, which are used for bearing 3D printing photosensitive resin and serving as a working platform for photocuring forming. The photocuring 3D printing method utilizes the forming platform assembly to perform 3D printing. The forming platform assembly comprises a first cylinder and a second cylinder. The first cylinder comprises a first body part and a flow guide channel. The flow guide channel is communicated from above the first body part to below the first body part or to the lower side of the outer edge wall. The second cylinder comprises a second body part containing space and a light transmission film. The containing space is in the second body part and opens upward. The first cylinder is movably arranged in the containing space of the second cylinder, so that the outer edge wall of the first cylinder moves towards the inner edge wall of the second cylinder. The application adopts automatic photosensitive resin flow control and a disposable printing platform, solves the problems of stickiness, splashing and cleaning difficulty in traditional photocuring 3D printing, reduces the labor input and improves the efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of 3D printing technology, in particular to a forming platform assembly for light-curing 3D printing and a light-curing 3D printing method. BACKGROUND

[0002] With the rapid development of three-dimensional printing technology (3D Printing), light-curing 3D printing (SLA, Stereolithography) has become a high-precision manufacturing method suitable for various industries. Light-curing 3D printing is a high-precision forming 3D printing technology that uses light polymerization principles. It was first invented by American engineer Chuck Hull in 1984. The core mechanism is to fill the liquid photosensitive resin into the resin tank with a transparent bottom, and then irradiate it layer by layer with ultraviolet laser or light source, so that the resin undergoes polymerization reaction under the irradiation of specific wavelength light, thereby changing from liquid to solid. The printing platform will gradually rise with each layer of solidification, allowing a new layer of liquid resin to cover the previous layer, and repeating the process of exposure and solidification, ultimately building a complete three-dimensional object. SLA technology has extremely high printing resolution and surface smoothness, and can achieve detailed geometric structures and complex designs, so it is widely used in jewelry design, dental models, medical devices, industrial prototypes, etc. It supports a variety of resin materials, including standard, toughness, high-temperature resistance, and castable types, to meet different application needs. SLA 3D printing technology plays an important role in high-level 3D printing applications due to its excellent precision and quality.

[0003] However, traditional light-curing 3D printing equipment still has many defects and problems affecting efficiency and environmental hygiene in actual application. First, the traditional light-curing equipment needs to rely on manual addition of photosensitive resin solution. The solution has certain viscosity and fluidity, and is easy to splash and stain during addition and transfer, often causing the user's hands and work area to be sticky and inconvenient to clean and maintain. Second, after the workpiece is printed, the user needs to manually remove the workpiece from the photosensitive liquid, and separate and wipe the workpiece and the liquid tank container, which can easily cause the working environment to be dirty, produce odors and solidification residues, and increase the labor cost of post-processing.

[0004] In addition, the storage and usage control of photosensitive liquid also mostly rely on manual operation, which not only may cause printing interruption or material waste due to estimation error, but also reduces the stability and scalability of the overall production. In addition, there is no unified automatic mechanism for the replacement, installation and removal of the photosensitive liquid container, so the overall process relies heavily on manual intervention and has a low degree of automation, which is not conducive to achieving high efficiency in mass production environment.

[0005] Therefore, there is an urgent need for an improved disposable component that can be adapted to most existing 3D light-cured printers, capable of achieving a higher degree of automation and cleanliness from material supply, printing process control, to workpiece removal and cleaning after processing, to improve factory operation efficiency, user experience and overall product quality. SUMMARY

[0006] The main purpose of the present application is to provide a new light-cured 3D printing technology and equipment to solve the problems of sticky, splashing, and difficult cleaning of photosensitive resin in traditional light-cured 3D printing.

[0007] Another purpose of the present application is to achieve automatic addition of photosensitive resin by controlling the flow of photosensitive resin, thereby replacing manual addition, which is difficult to control the amount of solution, to improve the degree of automation in 3D printing process, reduce labor input, and also avoid the problems of splashing and hand contamination caused by manual addition.

[0008] Still another purpose of the present application is to provide a disposable, disposable light-cured printing platform and a photosensitive resin container to achieve rapid module replacement, reduce labor input, and eliminate the trouble of cleaning and maintenance afterwards.

[0009] To achieve the above-mentioned purposes, the technical solution adopted by the present application is:

[0010] The present application provides a forming platform assembly for light-cured 3D printing, which is used to carry photosensitive resin for 3D printing and as a working platform for light-cured forming; the forming platform assembly comprises a first cylinder and a second cylinder, the first cylinder comprises a first body part, an outer edge wall, a clamping part and at least one flow guide channel, the outer edge wall is located on the outer side of the first body part, the clamping part is located on the outer edge wall, and the flow guide channel is connected from above the first body part to below the first body part or to the lower side of the outer edge wall; the second cylinder comprises a second body part and a light-transmitting film, the second body part is a hollow cylindrical structure with an opening facing upward, the light-transmitting film is arranged on the lower side of the second body part, and the second body part defines an inner edge wall inside, and the inside of the inner edge wall is a containing space. Wherein, the first cylinder is movably arranged in the containing space of the second cylinder, so that the first cylinder moves relative to the second cylinder.

[0011] The forming platform assembly for light-cured 3D printing as described above, the lower end of the flow guide channel is bifurcated or multi-furcated.

[0012] The molding platform assembly of the light-cured 3D printing as mentioned above, the second cylinder further comprises at least two stop units, the stop units are arranged on the upper half of the inner wall, when the first cylinder moves upward in the accommodating space, the stop units contact and stop the outer wall of the first cylinder; in further embodiments, the outer wall of the first cylinder is further provided with at least one limiting groove, the limiting groove is matched with the stop unit, so that the stop unit is contacted or stopped in the limiting groove.

[0013] The molding platform assembly of the light-cured 3D printing as mentioned above, the second cylinder further comprises at least two stop units, the stop units are arranged on the upper half of the inner wall, when the first cylinder moves upward in the accommodating space, the stop units contact and stop the outer wall of the first cylinder; in further embodiments, the outer wall of the first cylinder is further provided with at least one limiting groove, the limiting groove is matched with the stop unit, so that the stop unit is contacted or stopped in the limiting groove.

[0014] The molding platform assembly of the light-cured 3D printing as mentioned above, the molding platform assembly is matched with a photosensitive resin tank of a 3D printing device, the first cylinder is arranged below the photosensitive resin tank, the photosensitive resin tank comprises a flow-stopping assembly arranged in the photosensitive resin tank, the flow-stopping assembly is used to block the outlet of the photosensitive resin tank; the first cylinder is further provided with a push rod unit, a flexible unit and a pressing unit, one end of the pressing unit is located on the outer wall, the other end of the pressing unit is connected to or stops the flexible unit, the flexible unit is pushed by the pressing unit to swing upward, and is used to push the push rod unit to move in the vertical direction, so that the upper end of the push rod unit moves upward and enters the photosensitive resin tank; in further embodiments, the flexible unit comprises a slope assembly and a swing assembly, one end of the swing assembly is fixedly arranged in the first cylinder, the other end of the swing assembly is connected to the slope assembly, the slope assembly pushes the lower side of the push rod unit by the slope.

[0015] The molding platform assembly for light-cured 3D printing as described above can be adapted to a light-sensitive resin tank of a 3D printing device, the first cylinder is arranged below the light-sensitive resin tank, the light-sensitive resin tank includes a flow-stopping assembly to block the outlet of the light-sensitive resin tank; the first cylinder further includes a top rod unit, a flexible unit and a pressing unit, one end of the pressing unit is located on the outer wall, the other end is connected to or abuts against the flexible unit, the flexible unit is pushed by the pressing unit to swing and push the top rod unit to move in the vertical direction, so that the upper end of the top rod unit moves upward and enters the light-sensitive resin tank; in further embodiments, the flexible unit includes a slope assembly, the top rod unit includes a rod-shaped element and a ball-shaped element, the rod-shaped element is located above, and the ball-shaped element is located below, the ball-shaped element is pushed by the slope assembly to move in the vertical direction.

[0016] The molding platform assembly for light-cured 3D printing as described above can be adapted to a clamping unit of a 3D printing device, the clamping unit can move up and down and clamp, abut or engage into the clamping portion of the first cylinder.

[0017] The molding platform assembly for light-cured 3D printing as described above can be adapted to a clamping unit of a 3D printing device, the clamping unit can move up and down and clamp, abut or engage into the clamping portion of the first cylinder.

[0018] The molding platform assembly for light-cured 3D printing as described above, the outer wall of the first cylinder abuts against the inner wall of the second cylinder.

[0019] The molding platform assembly for light-cured 3D printing as described above, the first cylinder further includes a first stop assembly located at the lowermost edge of the outer wall, and the second cylinder further includes a second stop assembly located at the uppermost edge of the inner wall, when the first cylinder is in the accommodation space of the second cylinder, the second stop assembly blocks or is located on the action path of the first stop assembly.

[0020] The molding platform assembly for light-cured 3D printing as described above, the first cylinder further includes at least one opening located at the lower edge of the outer wall and in communication with the flow guide channel.

[0021] The molding platform assembly for light-cured 3D printing as described above can be adapted to a light-sensitive resin tank of a light-cured 3D printing device, with the first barrel arranged below the light-sensitive resin tank, and the light-sensitive resin tank comprising a flow-stopping assembly to block the outlet of the light-sensitive resin tank; the first barrel further comprises a ejector rod unit fixed to the uppermost part of the first body, and the ejector rod unit can move in and out of the outlet of the light-sensitive resin tank along with the up-and-down movement of the first barrel.

[0022] The molding platform assembly for light-cured 3D printing as described above, wherein the outer wall part covers part of the flow guide channel.

[0023] The molding platform assembly for light-cured 3D printing as described above, wherein the flow guide channel is in multiple numbers, and the multiple flow guide channels are separated from each other by the first body part.

[0024] The molding platform assembly for light-cured 3D printing as described above, wherein the light-transmitting film is detachably adhered or attached to the lowermost part of the second body.

[0025] To solve the above-mentioned and other problems, the present application provides a light-cured 3D printing method for operating the molding platform assembly described above; the light-cured 3D printing method comprises the following steps: step A1: providing a molding platform assembly for light-cured 3D printing; step A2: installing and adapting the molding platform assembly to a light-cured 3D printing device; step A3: driving the light-sensitive resin to flow out, so that the light-sensitive resin flows through the flow guide channel and enters the accommodation space; step A4: driving the light source projection device to make the light pass through the light-transmitting film and enter the accommodation space; step A5: taking out the molding platform assembly; step A6: separating the first barrel from the second barrel, and removing the hardened resin layer around the first barrel.

[0026] The light-cured 3D printing method as described above, wherein the light-cured 3D printing device comprises a light-sensitive resin tank for accommodating the light-sensitive resin, and the light-sensitive resin tank comprises a flow-stopping assembly to block the outlet of the light-sensitive resin tank; the first barrel further comprises an ejector rod unit located at the uppermost part of the first body; and step A3 further comprises the following sub-steps: step A31: moving the first barrel or the ejector rod unit upward or moving the light-sensitive resin tank downward, so that the ejector rod unit moves in and out of the outlet of the light-sensitive resin tank; step A32: the ejector rod unit pushes away the flow-stopping assembly, so that the light-sensitive resin in the light-sensitive resin tank flows out due to gravity.

[0027] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0028] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0029] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0030] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing this case.

[0031] The working principle and advantages of this invention are as follows:

[0032] Compared with existing technologies, the photopolymer 3D printing molding platform component and photopolymer 3D printing method of the present invention have the following beneficial effects:

[0033] 1. Solves problems such as stickiness, splattering, and cleaning difficulties associated with traditional photopolymer 3D printing.

[0034] 2. By controlling the flow rate of photosensitive resin, the addition of photosensitive resin can be automated, thereby replacing the problems of manual addition and difficulty in controlling the amount of solution.

[0035] 3. Provide disposable, reusable photopolymer printing platforms and photosensitive resin containers to achieve rapid module replacement, reduce manpower input, and eliminate the hassle of post-processing cleaning.

[0036] 4. It increases the level of automation in the 3D printing process, reduces manpower input, and avoids problems such as shallow spraying and sticking to hands caused by manual addition. Attached Figure Description

[0037] Appendix Figure 1 This is a schematic diagram of the combination of the photopolymerization 3D printing equipment and molding platform components in Embodiment 1 of the present invention;

[0038] Appendix Figure 2 This is an exploded view of the molding platform component for photopolymer 3D printing according to Embodiment 1 of the present invention;

[0039] Appendix Figure 3 This is a schematic diagram of the assembly of the molding platform components for photopolymer 3D printing according to Embodiment 1 of the present invention;

[0040] Figure 1 is a schematic diagram of the flow of the photosensitive resin in the molding platform assembly of the embodiment 1 of the present application; Figure 4 Figure 2 is a schematic diagram of the light curing and layer-by-layer accumulation of the photosensitive resin in the molding platform assembly of the embodiment 1 of the present application;

[0041] Figure 5 Figure 3 is a schematic diagram of the operation of the light curing 3D printing device and the molding platform assembly of the embodiment 1 of the present application;

[0042] Figure 4 is a schematic diagram of the operation of the light curing 3D printing device and the molding platform assembly of the embodiment 1 of the present application; Figure 6 Figure 1 Figure 5 is a schematic diagram of the automatic flow control of the molding platform assembly of the embodiment 2 of the present application;

[0043] Figure 6 is a schematic diagram of the automatic flow control of the molding platform assembly of the embodiment 2 of the present application; Figure 7 Figure 2 Figure 7 is a schematic diagram of the combination of the molding platform assembly and the light curing 3D printing device of the embodiment 2 of the present application;

[0044] Figure 8 is a schematic diagram of the flexible unit and the pressing unit of the molding platform assembly of the embodiment 2 of the present application; Figure 8 Figure 1 Figure 9 is a schematic diagram of the structure of the molding platform assembly of the light curing 3D printing of the embodiment 3 of the present application;

[0045] Figure 10 is a schematic diagram of the combination of the light curing 3D printing device and the molding platform assembly of the embodiment 4 of the present application; Figure 9 Figure 2 Figure 11 is a sectional view of the molding platform assembly of the light curing 3D printing of the embodiment 5 of the present application;

[0046] Figure 12 is a perspective view of the molding platform assembly of the light curing 3D printing of the embodiment 5 of the present application; Figure 10 Figure 13 is a flow chart of the steps of the light curing 3D printing method of the embodiment 1 of the present application;

[0047] Figure 11 Figure 14 is a flow chart of the steps of the light curing 3D printing method of the embodiment 1 of the present application;

[0048] Figure 15 is a flow chart of the steps of the light curing 3D printing method of the embodiment 1 of the present application; Figure 12 Figure 16 is a flow chart of the steps of the light curing 3D printing method of the embodiment 1 of the present application;

[0049] Figure 13 Figure 17 is a flow chart of the steps of the light curing 3D printing method of the embodiment 1 of the present application;

[0050] Figure 18 is a flow chart of the steps of the light curing 3D printing method of the embodiment 1 of the present application; Figure 14 Figure 19 is a flow chart of the steps of the light curing 3D printing method of the embodiment 1 of the present application;

[0051] Figure 15 Figure 20 is a flow chart of the steps of the light curing 3D printing method of the embodiment 1 of the present application;

[0052] Figure 21 is a flow chart of the steps of the light curing 3D printing method of the embodiment 1 of the present application; Figure 16 Figure 22 is a flow chart of the steps of the light curing 3D printing method of the embodiment 1 of the present application;

[0053] Figure 17 ​​​​​​​​​The sub-step flow chart for driving the flow of photosensitive resin in step A3 of the light-curing 3D printing method of embodiment 1 of the present application.

[0054] In the above figures:

[0055] 1. A molding platform assembly;

[0056] 11. A first barrel; 111. A first body portion; 112. A flow guide channel; 113. A clamping portion; 114. A limiting groove; 115. An outer edge wall; 116. A pressing unit; 117. A flexible unit; 1171. A swing assembly; 1172. An inclined surface assembly; 118. A ejector rod unit; 1181. A rod-shaped element; 1182. A spherical element; 1113. An opening; 1115. A first stop assembly; 1116. A partition; 1215. A second stop assembly;

[0057] 12. A second barrel; 121. A second body portion; 122. A containing space; 123. A light-transmitting film; 124. A abutting unit; 1241. A groove; 1242. A spring; 1243. A ball; 125. An inner edge wall; 126. An abutting assembly;

[0058] 81. A hardened resin layer;

[0059] 90. A light-curing 3D printing device; 91. A support; 92. A photosensitive resin tank; 93. A retaining unit; 94. A light source projection device; 95. A clamping unit;

[0060] 921. Photosensitive resin; 922. An outlet; 923. A flow-stopping assembly; 932. A concave hole; 941. A light-emitting assembly; 942. A reflecting assembly. DETAILED DESCRIPTION

[0061] The present application will be further described with reference to the drawings and embodiments:

[0062] The present application will be further described with reference to the drawings and embodiments:

[0063] The language used in the specification is for the purpose of describing specific embodiments and is not intended to limit the application. The singular forms "a," "an," and "the" include plural referents unless the context clearly dictates otherwise.

[0064] Embodiment 1: Please refer to Figure 1 , Figure 1The illustration shows a schematic diagram of the combination of the photopolymer 3D printing equipment and the molding platform assembly of the present invention. As shown, a molding platform assembly 1 is used to adapt to a photopolymer 3D printing equipment 90. The photopolymer 3D printing equipment 90 includes a support 91, a photosensitive resin tank 92, a fixing unit 93, a light source projection device 94, and a clamping unit 95. The photosensitive resin tank 92 is located on the upper side of the support 91, and can be fixed on the support 91 or can move up and down relative to the support 91. The photosensitive resin tank 92 can hold and contain photosensitive resin 921, and the photosensitive resin tank 92 includes an outlet 922 at its bottom. The application scenario of this invention is stereolithography (SLA). The photosensitive resin 921 in the photosensitive resin tank 92, also known as stereolithography resin, is key in that its formulation contains a photoinitiator and monomers / oligomers. When irradiated by a light source of a specific wavelength, it will undergo curing and hardening. The curing mechanism of the photosensitive resin 921 is as follows: when the resin is irradiated by a specific wavelength (usually UV light, such as 405nm), the photoinitiator absorbs energy and generates free radicals or cations; these free radicals further react with monomers / oligomers, initiating a chain polymerization reaction to form a cross-linked structure. Since the light energy is localized, the resin only cures in the irradiated area, while the unirradiated area remains liquid. Therefore, as long as the irradiated area of ​​the light source can be controlled, the curing position of the photosensitive resin 921 can be controlled, thereby controlling the shape of the structure after molding. This photosensitive curing mechanism gives the curing process extremely high spatial resolution and fast reaction time, which is the advantage of stereolithography in precision printing.

[0065] The retaining unit 93 is located below the support 91. The retaining unit 93 includes a recess 932, which in this embodiment is perfectly circular. The light source projection device 94 includes a light-emitting component 941 and a reflective component 942. The light-emitting component 941 projects light of a specific wavelength, and the reflective component 942 controls the light path, directing the light to a specific position to cure the photosensitive resin 921 at that specific position. Figure 5 As shown, by controlling the swinging or rotating of the reflective component 942, the path of the light can be controlled, thereby controlling the forming shape of multiple hardened resin layers 81. Then, as the first cylindrical component 11 gradually rises, the hardened resin layers 81 can accumulate layer by layer, gradually forming a complete workpiece, completing the 3D printing process. Please also refer to... Figures 2-3 , Figures 2-3The illustrated is the disassembly and combination schematic diagram of the forming platform assembly of the light-cured 3D printing of the present application, the forming platform assembly 1 of the present application can be used to adapt the light-cured 3D printing equipment 90. The forming platform assembly 1 includes a first cylinder 11 and a second cylinder 12. The first cylinder 11 includes a first body part 111, an outer edge wall 115, a clamping part 113 and a flow guide channel 112. The outer edge wall 115 is located on the outer side of the first body part 111, and the clamping part 113 is located on the outer edge wall 115. The flow guide channel 112 is communicated from above the first body part 111 to below the first body part 111 or to the lower side of the outer edge wall 115; in this embodiment, the lower end of the flow guide channel 112 is bifurcated into two, and in other embodiments, the flow guide channel 112 can also be bifurcated into multiple or a single channel (one inlet and one outlet, no bifurcation). As shown, the flow guide channel 112 is bifurcated into two (i.e. one inlet and two outlets). The photosensitive resin 921 dropped or flowed above the first cylinder 11 can flow from top to bottom along the flow guide channel 112, flow to the inner edge wall 125 of the second cylinder 12, and then flow downward along the inner edge wall 125 to the accommodation space 122 of the second cylinder 12. In other embodiments, the flow guide channel 112 structure without bifurcation (one inlet and one outlet) is as shown. Figure 4 The flow guide channel 112 is bifurcated into two (i.e. one inlet and two outlets). Figure 8 、 Figure 9 The second cylinder 12 includes a second body part 121 and a light-transmitting film 123, the second body part 121 is a hollow cylinder structure with an opening facing upward, the light-transmitting film 123 is arranged at the lowermost side of the second body part 121, the light-transmitting film 123 can be detached or attached to the lower side of the second body part 121, so that the light-transmitting film 123 can be pasted to the lower side of the second cylinder 12 during use. The second body part 121 has an inner edge wall 125 inside, and the inner part of the inner edge wall 125 is an accommodation space 122. The first cylinder 11 is movably arranged in the accommodation space 122 of the second cylinder 12, so that the outer edge wall 115 of the first cylinder 11 reciprocally moves against the inner edge wall 125 of the second cylinder 12. As shown, Figure 1As shown, the second cylinder 12 of the forming platform assembly 1 is movably placed or arranged in the hollow 932 of the retaining unit 93, so that the retaining unit 93 abuts or slightly clamps the second cylinder 12 to prevent the second cylinder 12 from moving arbitrarily; in this way, the first cylinder 11 can be aligned with the upper photosensitive resin tank 92 and used to receive the photosensitive resin 921 flowing out of the outlet 922. In a preferred embodiment, the second cylinder 12 of the forming platform assembly 1 and the hollow 932 of the retaining unit 93 are in a loose fitting state, and in other embodiments, the second cylinder 12 and the hollow 932 can also be in a slightly clamped or structural fitting state.

[0066] As shown in the drawings, Figure 1 , Figures 2-3 As shown, the clamping unit 95 can move up and down and can be used to clamp, abut or clamp into the clamping portion 113 of the first cylinder 11. In this way, the clamping unit 95 is aligned with the clamping portion 113 of the first cylinder 11, and then clamps, clamps the first cylinder 11, which can drive the first cylinder 11 to move up and down. Therefore, the forming platform assembly 1 can be used to carry the 3D printed photosensitive resin 921 as a working platform for photocuring molding. In this embodiment, the clamping portion 113 of the first cylinder 11 is a recessed structure, and the clamping unit 95 of the photocuring 3D printing device 90 can enter or clamp into the recessed clamping portion 113; in other embodiments, the clamping portion 113 can also be a convex structure to abut, tenon or mutually occlude the clamping unit 95, thereby driving the first cylinder 11 to move up and down.

[0067] As shown in the drawings, Figures 2-3As shown, in order to strengthen the combination structure of the first cylinder 11 and the second cylinder 12, and facilitate packaging or selling, the second cylinder 12 further comprises two abutting units 124, which are arranged on the upper half of the inner edge wall 125. When the first cylinder 11 reciprocates in the accommodating space 122, the abutting units 124 contact and abut against the outer edge wall 115 of the first cylinder 11. The abutting units 124 comprise a groove 1241, a spring 1242 and a ball 1243. The groove 1241 is embedded in the inner edge wall 125 of the second cylinder 12, and the spring 1242 and the ball 1243 are located in the groove 1241. The spring 1242 pushes the ball 1243, so that the ball 1243 contacts the outer edge wall 115 of the first cylinder 11. The outer edge wall 115 of the first cylinder 11 is provided with a limiting groove 114, which is adapted to the abutting unit 124, so that the abutting unit 124 contacts or abuts into the limiting groove 114. In this way, when the first cylinder 11 moves relative to the second cylinder 12, the ball 1243 of the abutting unit 124 can prevent the first cylinder 11 and the second cylinder from separating from each other, so that the abutting unit 124 has a limiting function.

[0068] Please refer to Figures 6-7 , Figures 6-7 The operation condition schematic diagram of the light-curing 3D printing device and the forming platform assembly is shown. As Figure 6 shown, when the forming platform assembly 1 of the present application is installed and adapted on the light-curing 3D printing device 90, the clamping unit 95 can clamp the clamping part 113 of the first cylinder 11, thereby driving the first cylinder 11 to move up and down. At this time, as Figure 7 shown, the first cylinder 11 is located below the photosensitive resin tank 92, and the photosensitive resin 921 in the photosensitive resin tank 92 can be controlled to flow down from the outlet 922, enter the flow guide channel 112 of the first cylinder 11, and then flow into the accommodating space 122 of the second cylinder 12, waiting for the light source projection device 94 to start the curing work.

[0069] Therefore, the forming platform assembly 1 of the present application can be matched and installed in the light-curing 3D printing technology and equipment, and the combination of the first barrel 11 and the second barrel 12 effectively solves the problems of sticking, splashing and cleaning difficulty of the photosensitive resin in the traditional light-curing 3D printing. The forming platform assembly 1 not only realizes the automatic addition of the photosensitive resin 921, improves the automation degree in the printing process, reduces the labor input, and avoids the splashing and sticking problems that may occur during manual addition; at the same time, the forming platform assembly 1 of the present application adopts the design of disposable and disposable light-curing printing platform and photosensitive resin container, thereby realizing fast module replacement, reducing the labor demand, and eliminating the trouble of subsequent cleaning. The ingenious combination design of the first barrel 11 and the second barrel 12, especially the optimized layout and application of the flow channel 112, ensures the smooth supply and stable curing process of the photosensitive resin 921, thereby greatly improving the cleaning efficiency of 3D printing, making the entire printing process more smooth, environmentally friendly and user-friendly.

[0070] Embodiment 2: Please refer to Figures 8-9 , Figures 8-9 The automatic flow control schematic diagram of the forming platform assembly of the embodiment 2 of the present application is shown. The present application can also have other embodiments, such as Figures 8-9 As shown, the photosensitive resin tank 92 includes a flow stop assembly 923 for plugging the outlet 922 of the photosensitive resin tank 92 to prevent the photosensitive resin 921 from flowing out. The first barrel 11 is further provided with a top rod unit 118, a flexible unit 117 and a pressing unit 116. The left end of the pressing unit 116 is located at the outer edge wall 115, and the right end is connected or abuts against the flexible unit 117. The flexible unit 117 can reciprocate under the pushing of the pressing unit 116 (see also Figure 11 ), and is used to push the top rod unit 118 to move in the vertical direction, so that the upper end of the top rod unit 118 moves upward and enters the photosensitive resin tank 92. Among them, the flexible unit 117 includes a slope assembly 1172 and a swing assembly 1171, one end of the swing assembly 1171 is fixedly arranged in the first barrel 11, the other end is connected with the slope assembly 1172, and the swing assembly 1171 is made of shape memory material. As Figure 11As shown, under the pressure of the pressing unit 116, the swing component 1171 will move to the right, generating a flexible deformation. After a period of time, due to the "shape memory" characteristic, the swing component 1171 will automatically rebound and return to its original position. The push rod unit 118 includes a rod-shaped element 1181 and a ball-shaped element 1182. The rod-shaped element 1181 is located above, and the ball-shaped element 1182 is located below. The inclined surface component 1172 of the flexible unit 117 pushes the lower side of the push rod unit 118 with its inclined surface. That is, the inclined surface component 1172 pushes the ball-shaped element 1182 of the push rod unit 118 by tilting, and the ball-shaped element 1182 can move in the vertical direction by being pushed by the inclined surface.

[0071] In this way, as Figures 8-11 As shown, when an operator presses the pressing unit, the pushing action causes the rod-shaped element 1181 of the push rod unit 118 to protrude upwards from the first cylinder 11. The rod-shaped element 1181 then enters the photosensitive resin tank 92, thereby pushing open the flow-stopping component 923 at the outlet 922, allowing the photosensitive resin 921 in the photosensitive resin tank 92 to flow downwards. After a short period, the swing component 1171 of the flexible unit 117 rebounds, causing the push rod unit 118 to fall downwards. This causes the flow-stopping component 923 in the photosensitive resin tank 92 to move downwards, thus blocking and sealing the outlet 922, stopping the flow of the photosensitive resin 921. Therefore, by linking the pressing unit 116, the flexible unit 117, and the push rod unit 118, the flow rate of the photosensitive resin 921 can be controlled by the operator's pressing action. In this embodiment, there are multiple pressing units 116 (illustrated in...). Figure 10 Inside the first cylindrical component 11, each pressing unit 116 corresponds to a push rod unit 118 and a flexible unit 117. Different flexible units 117 have different thicknesses of their swing components 1171, resulting in varying degrees of flexibility and thus different rebound times. In this way, by pressing different pressing units 116, the operator can control the upward pushing time of the rod-shaped element 1181, thereby controlling the outflow of the photosensitive resin 921. The workpiece to be printed (i.e., the...) Figure 5 The larger the hardened resin layer 81, the greater the required flow rate of photosensitive resin 921. Therefore, the operator can directly contact and press the pressing unit 116 from the outer wall 115 of the first cylinder 11 to control the flow rate of the photosensitive resin 921, thereby improving the automation efficiency of the photopolymerization 3D printing equipment 90.

[0072] Example 3: Please refer to Figure 12 , Figure 12The diagram illustrates the structure of the molding platform component for photopolymer 3D printing according to Embodiment 3 of the present invention. Figure 12 As shown, in this embodiment, the molding platform assembly 1 includes a first stop assembly 1115 in its first cylindrical member 11. The first stop assembly 1115 protrudes towards the left and right sides of the first body portion 111 and is located at the lowest edge of the outer wall 115. The second cylindrical member 12 also includes a second stop assembly 1215, which protrudes towards the accommodating space 122 and is located at the uppermost edge of the inner wall 125. As shown, when the lower half of the first cylindrical member 11 is located within the accommodating space 122 of the second cylindrical member 12, the second stop assembly 1215 blocks or is located in the movement path of the first stop assembly 1115; that is, the second stop assembly 1215 is above the first stop assembly 1115, blocking the upward movement path of the first stop assembly 1115, thereby preventing the first cylindrical member 11 and the second cylindrical member 12 from detaching or separating from each other. When the 3D printing operation of the photopolymer 3D printing equipment 90 is completed, the operator can gently pry open the second stop assembly 1215 above the second cylinder 12 with both hands (in this embodiment, the second cylinder 12 is made of a flexible material such as plastic, resin, or polymer compound, so the second body part 121 can deform slightly), thus separating the first cylinder 11 and the second cylinder 12 from each other; then, the operator can remove the printed workpiece below the first cylinder 11 (i.e., the printed part). Figure 5 After the hardened resin layer 81 is formed, the disposable molding platform component 1 is discarded, eliminating the need for staff to clean the photosensitive resin 921, thus saving time and effort and improving overall work efficiency.

[0073] Example 4: Please refer to Figure 13 , Figure 13 The illustration shows a schematic diagram of the combination of the photopolymerization 3D printing equipment and the molding platform components in Embodiment 4 of the present invention. Figure 13As shown, the light-cured 3D printing apparatus 90 includes a flow-stopping assembly 923 in the light-sensitive resin tank 92 to block the outlet 922 of the light-sensitive resin tank 92. The first barrel 11 of the forming platform assembly 1 is provided with a top rod unit 118 at the upper end of the first barrel 11. The top rod unit 118 is arranged at the uppermost position of the first barrel 11 and can move in and out of the outlet 922 of the light-sensitive resin tank 92 along with the up-and-down movement of the first barrel 11. In this way, when the top rod unit 118 moves upward into the outlet 922 of the light-sensitive resin tank 92, the top rod unit 118 can push and open the flow-stopping assembly 923, so that the light-sensitive resin 921 in the light-sensitive resin tank 92 flows downward into the first barrel 11. In this embodiment, the flow guide channels 112 are three in number, and the cross section of the flow guide channels 112 is in the shape of a sector. The flow guide channels 112 are in the shape of a sector column from top to bottom. The first barrel 11 further includes a plurality of openings 1113 located at the lower edge of the outer edge wall 115. Each flow guide channel 112 is in communication with one opening 1113, so that the light-sensitive resin 921 above the first barrel 11 can flow through the flow guide channels 112 and then flow out of the plurality of openings 1113 and into the accommodation space 122 of the second barrel 12.

[0074] Embodiment 5: Please refer to Figures 14-15 , Figures 14-15 The cross-sectional view and perspective view of the forming platform assembly of the light-cured 3D printing apparatus of Embodiment 5 of the present application are shown. As shown, the upper edge of the second barrel 12 extends outwardly to form a abutting assembly 126. The abutting assembly 126 is movably abutted or engaged with the periphery of the recess 932 of the retaining unit 93 (see the cooperation with Figure 10 、 Figure 13). In addition, the first body part 111 of the first cylinder member 11 in this embodiment is composed of three partitions 1116, and the ejector pin unit 118 of the first cylinder member 11 is fixed above the first body part 111, and the three partitions 1116 are arranged in a 120-degree sector around the ejector pin unit 118 as the center. The three partitions 1116 of the first body part 111 divide and separate three flow guide channels 112. In this embodiment, the first body part 111 is composed of three partitions 1116, and in other embodiments, the first body part 111 can also be composed of four, five, or six partitions 1116 that are equally divided (one circle is equally divided into four, five, or six parts). In addition, the outer edge wall 115 of the first cylinder member 11 partially covers the flow guide channels 112, that is, from top to bottom, the outer edge wall 115 only covers the upper end part of the flow guide channels 112 (in a circumferential manner around the three partitions 1116), and the lower end part of the flow guide channels 112 is not covered. In this way, when the first cylinder member 11 is driven to move upward, the ejector pin unit 118 can push open the flow-stopping assembly 923 in the photosensitive resin tank 92, so that the photosensitive resin 921 flows downward and flows through the flow guide channels 112 in a meandering manner, and then reaches the bottom of the accommodation space 122 of the second cylinder member 12.

[0075] Here, in order to clearly show the operation steps of the molding platform assembly 1 of the above-mentioned embodiments, the use method of the molding platform assembly 1 is further described below. Please refer to Figure 16 , Figure 16 The flow chart of the photocuring 3D printing method of the present application is shown. As Figure 16 shown, a photocuring 3D printing molding platform assembly 1 is provided (step A1), which can be the structure of any of the above-mentioned embodiments. Here, if the obtained first cylinder member 11 and second cylinder member 12 are in a separated state, the first cylinder member 11 should be sleeved into the accommodation space 122 of the second cylinder member 12, so that the first cylinder member 11 and the second cylinder member 12 are combined by abutting against each other. Then, the assembled molding platform assembly 1 is installed and adapted to the photocuring 3D printing device 90 (step A2, as Figure 1 , Figure 6 , Figure 10 , Figure 13 shown), so that the first cylinder member 11 of the molding platform assembly 1 is located below the photosensitive resin 921, and the light-transmitting film 123 of the second cylinder member 12 is aligned with the light source projection device 94 of the photocuring 3D printing device 90. Then, the photosensitive resin 921 in the photosensitive resin tank 92 is driven to flow out, so that the photosensitive resin 921 flows through the flow guide channels 112 of the first cylinder member 11 and then enters the accommodation space 122 of the second cylinder member 12 (step A3, asFigure 4 、 Figure 7 The way of driving the photosensitive resin 921 to flow out in step A3 can be as follows: Figure 1 、 Figure 4 、 Figure 6 or Figure 7 The outlet 922 of the photosensitive resin tank 92 is opened, and the photosensitive resin 921 flows out by gravity; or as shown in Figure 17 , the first cylinder 11 or the ejector rod unit 118 is moved upward, or the photosensitive resin tank 92 is moved downward, so that the ejector rod unit 118 enters or exits the outlet 922 of the photosensitive resin tank 92 (step A31, as shown in Figures 8-10 、 Figure 13 , and then the ejector rod unit 118 pushes away the flow-stopping component 923 in the photosensitive resin tank 92, and the photosensitive resin 921 in the photosensitive resin tank 92 flows out under the action of gravity (step A32).

[0076] After the photosensitive resin 921 enters the accommodating space 122 of the second cylinder 12, the light source projection device 94 is driven to make light pass through the light-transmitting film 123 and enter the accommodating space 122 (step A4, refer to Figure 5 ), so as to irradiate and cure the photosensitive resin 921, so that the photosensitive resin 921 hardens and forms the hardened resin layer 81. After the entire hardened resin layer 81 is formed, the entire workpiece is manufactured, the forming platform assembly 1 is detached from the photocuring 3D printing device 90 (step A5), the first cylinder 11 and the second cylinder 12 are separated, and then the hardened resin layer 81 around the first cylinder 11 is removed (step A6). In this way, the photosensitive resin 921 remaining in the second cylinder 12 and the entire second cylinder 12 can be discarded, without wasting time cleaning and washing the photocuring 3D printing device 90, so as to achieve the purpose of completing the work and then stopping the work.

[0077] The above embodiments are only for illustrating the technical concept and characteristics of the present application, and the purpose is to enable those skilled in the art to understand the content of the present application and implement it, and cannot limit the protection scope of the present application. Any equivalent changes or modifications made according to the spirit and essence of the present application shall be covered within the protection scope of the present application.

Claims

1. A molding platform assembly for photopolymer 3D printing, the molding platform assembly (1) being used to support the photosensitive resin (921) for 3D printing and serving as a disposable working platform for photopolymer molding; characterized in that: The molding platform component (1) includes: A first cylindrical component (11) includes a first body portion (111), an outer sidewall (115), a clamping portion (113), and at least one flow channel (112); the outer sidewall (115) is located on the outer periphery of the first body portion (111), the clamping portion (113) is located on the outer sidewall (115), and the flow channel (112) connects from above the first body portion (111) to below the first body portion (111) or connects to the lower side of the outer sidewall (115); and A second cylindrical component (12) includes a second body part (121), at least two abutting units (124) and a light-transmitting membrane (123). The second body part (121) is a hollow cylindrical structure with the opening facing upward. The light-transmitting membrane (123) is disposed on the lower side of the second body part (121). The second body part (121) has an inner sidewall (125). The interior of the inner sidewall (125) is an accommodating space (122). The abutting units (124) are disposed on the upper half of the inner sidewall (125). The first cylindrical member (11) is movably disposed within the accommodating space (122) of the second cylindrical member (12), and the abutting unit (124) contacts and abuts against the outer wall (115) of the first cylindrical member (11), and causes the first cylindrical member (11) to reciprocate relative to the second cylindrical member (12). The outer wall (115) of the first cylindrical member (11) is also provided with at least one limiting groove (114), which is adapted to the abutting unit (124) so ​​that the abutting unit (124) contacts or abuts into the limiting groove (114).

2. The molding platform component for photopolymer 3D printing according to claim 1, characterized in that: The abutting unit (124) includes a groove (1241), a spring (1242), and a ball (1243). The groove (1241) is embedded in the inner wall (125) of the second cylindrical member (12). The spring (1242) and the ball (1243) are located in the groove (1241). The spring (1242) pushes the ball (1243) so that the ball (1243) contacts the outer wall (115) of the first cylindrical member (11).

3. The molding platform component for photopolymer 3D printing according to claim 1, characterized in that: The molding platform assembly (1) is adapted to the photosensitive resin tank (92) of a photopolymerization 3D printing device (90). The first cylindrical component (11) is located below the photosensitive resin tank (92). The photosensitive resin tank (92) includes a flow-stopping component (923) to block the outlet (922) of the photosensitive resin tank (92). The first cylindrical component (11) is also provided with a push rod unit (118), a flexible unit (117) and a pressing unit (116). One end of the pressing unit (116) is located on the outer sidewall (115), and the other end is connected to or abuts the flexible unit (117). The flexible unit (117) is pushed by the pressing unit (116) and swings back and forth, thereby pushing the push rod unit (118) to move in the vertical direction, so that the upper end of the push rod unit (118) moves upward and enters the photosensitive resin tank (92).

4. The molding platform component for photopolymer 3D printing according to claim 3, characterized in that: The flexible unit (117) includes a ramp assembly (1172) and a swing assembly (1171). One end of the swing assembly (1171) is fixed inside the first cylinder (11), and the other end is connected to the ramp assembly (1172). The ramp assembly (1172) pushes the lower side of the top rod unit (118) with its ramp.

5. The molding platform component for photopolymer 3D printing according to claim 3, characterized in that: The flexible unit (117) includes a ramp assembly (1172), and the push rod unit (118) includes a rod-shaped element (1181) and a ball-shaped element (1182). The rod-shaped element (1181) is located above, and the ball-shaped element (1182) is located below. The ball-shaped element (1182) is pushed by the ramp assembly (1172) and moves in the vertical direction.

6. The molding platform component for photopolymer 3D printing according to claim 1, characterized in that: The light-transmitting film (123) is detachably adhered to or attached to the lowest side of the second body part (121).

7. A photopolymer 3D printing method for operating a molding platform assembly (1) using any one of claims 1 to 6; characterized in that: The photopolymer 3D printing method includes the following steps: Step A1: Provide a photopolymer 3D printing molding platform component (1); Step A2: Install the molding platform component (1) onto a photopolymer 3D printing device (90); Step A3: Drive the photosensitive resin (921) to flow out, so that the photosensitive resin (921) flows through the guide channel (112) and enters the accommodating space (122); Step A4: Drive a light source projection device (94) to allow light to pass through the light-transmitting film (123) and enter the accommodating space (122); Step A5: Remove the molding platform component (1); Step A6: Separate the first cylinder (11) from the second cylinder (12) and remove the hardened resin layer (81) around the first cylinder (11).

8. The photopolymerization 3D printing method according to claim 7, characterized in that: The photopolymerization 3D printing equipment (90) further includes a photosensitive resin tank (92) for containing the photosensitive resin (921). A flow-stopping component (923) is provided inside the photosensitive resin tank (92) to block the outlet (922) of the photosensitive resin tank (92). The first cylindrical component (11) further includes a push rod unit (118) located at the top of the first body part (111). Step A3 further includes the following sub-steps: Step A31: Move the first cylinder (11) or the push rod unit (118) upward, or move the photosensitive resin tank (92) downward, so that the push rod unit (118) enters and exits the outlet (922) of the photosensitive resin tank (92); Step A32: The push rod unit (118) pushes open the flow-stopping component (923), causing the photosensitive resin (921) in the photosensitive resin tank (92) to flow out due to gravity.

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