A complete demolding 3D printing platform

Abstract

The application discloses a complete demolding 3D printing platform, and belongs to the field of additive manufacturing technology through 3D printing and photocuring, comprising a workbench, a forming table and a lifting module, wherein the workbench comprises a table plate, a printing module and a curing mechanism, and further comprises a support, a guard plate and a supporting leg arranged outside the workbench; the curing mechanism comprises a closed mounting frame, a DLP light source and a radiator; the printing module comprises a trough, a composite release film, a high borosilicate glass support plate and a vibration demolding aid assembly arranged in sequence from top to bottom; the bottom surface of the composite release film is connected to the upper surface of the high borosilicate glass support plate; the workbench further comprises a ventilation assembly and an auxiliary heat dissipation assembly, and the ventilation assembly and the auxiliary heat dissipation assembly are respectively arranged on the two sides of the closed mounting frame; the application has the advantages of high printing efficiency, good demolding effect and high efficiency of a heat management system.

Description

Technical Field

[0001] This invention belongs to the field of additive manufacturing technology through 3D printing and photopolymerization, and particularly relates to a 3D printing platform with complete demolding. Background Technology

[0002] Photopolymerization 3D printing technology uses ultraviolet light to cure liquid photosensitive resin layer by layer, and it is widely used in the field of precision component manufacturing.

[0003] However, existing printing platforms have significant technical bottlenecks in the demolding process and thermal management: insufficient demolding efficiency and integrity, specifically manifested in defects in interface adhesion control, a single peeling assistance mechanism, and limited mechanical properties of the release film. In addition, there are defects in the efficiency of the thermal management system, which can easily lead to problems such as uncontrolled temperature in the curing area and unreasonable airflow circulation paths.

[0004] Traditional printing platforms often use single-layer release films, whose uniform surface distribution leads to concentrated peeling forces. When demolding complex structural models such as those with barbs or thin-walled components, edge tearing or localized residue can easily occur. Until the problem of synergistic control between edge anchoring and low center adhesion is solved, the release film is easily pulled up as a whole, limiting the effective printing area. Summary of the Invention

[0005] The purpose of this invention is to provide a 3D printing platform with complete demolding to solve the problems of insufficient demolding efficiency and integrity, and insufficient thermal management system efficiency in common photopolymer 3D printing equipment.

[0006] The present invention achieves the above-mentioned objectives through the following technical solution: it includes a worktable, a forming table, and a lifting module. The worktable includes a table plate, a printing module, and a curing mechanism, and also includes a bracket, a protective plate, and feet disposed on the outside of the worktable. The curing mechanism includes a closed mounting frame, a DLP light source, and a heat sink. The printing module includes a material tank, a composite release film, a high borosilicate glass support plate, and a vibration-assisted release component arranged sequentially from top to bottom. The bottom surface of the composite release film is bonded to the upper surface of the high borosilicate glass support plate. The worktable also includes a ventilation component and an auxiliary heat dissipation component, which are respectively installed on both sides of the closed mounting frame.

[0007] Furthermore, the platform is a double-layered plate-like splicing structure with a square hole through the middle of each layer. The upper splicing plate has a thin film groove for supporting the composite release film, and the lower splicing plate has arc-shaped support plates fixed at the four corners of the square hole for supporting the high borosilicate glass support plate. The upper and lower double-layered plate-like splicing structures are both horizontally provided with columnar limiting grooves. The vibration-assisted release component is disposed inside the two columnar limiting grooves, and a vertical columnar mounting groove is also provided at one end of the columnar limiting groove. The columnar mounting groove is connected to the columnar limiting groove, and the other end of the columnar limiting groove is connected to the square hole.

[0008] Furthermore, the composite release film comprises an upper polyurea polymer film and a lower colorless polyimide film. The polyurea polymer film and the colorless polyimide film are bonded together after lamination. The central region of the upper surface of the polyurea polymer film is coated with a fluorosilicone coating containing silica nanoparticles, and the edge region of the upper surface of the polyurea polymer film is also coated with an acrylate coating. The area of ​​the polyurea polymer film is larger than the area of ​​the colorless polyimide film.

[0009] Furthermore, the polyurea polymer film is highly elastic, forming an elastic buffer when the printed product is pulled upwards, preventing the composite release film from breaking and being forcibly pulled up, thus detaching from the borosilicate glass substrate. The colorless polyimide film is even harder, serving as a stable bottom support and connecting structure, tightly connecting the composite release film to the borosilicate glass substrate, and preventing the composite release film from detaching from the borosilicate glass substrate due to external forces.

[0010] Furthermore, an acrylic material with higher surface energy is coated on the edge area (non-printing area) of the composite release film to form a coordinated structure of "low surface energy in the center + high adhesion at the edge". This reduces the adhesion between the printed product and the center area of ​​the composite release film, while the high adhesion at the edge ensures that the printed product is fixed to the edge of the composite release film. This increases the area of ​​the fluorosilicone coating, thereby increasing the actual printing area.

[0011] Furthermore, the ventilation assembly includes an air inlet pipe array and an air outlet pipe array. The air inlet pipe array and the air outlet pipe array are respectively installed on both sides of the closed mounting frame and penetrate its side wall. A straight pipe fitting is inserted into the outside of the air inlet pipe array and fixed with screws. The straight pipe fitting is used to converge multiple pipes of the air inlet pipe array into a single port. A small air pump is provided on the lower side of the air inlet pipe array, and the output end of the small air pump is connected to the port of the straight pipe fitting through a pipe. A dust cover is provided on the outside of the input end of the small air pump and is connected through a pipe. The dust cover penetrates the outer protective plate of the workbench and is fixed with screws and connectors.

[0012] Furthermore, the ventilation component injects air into the inside of the curing mechanism, which not only cools the DLP light source area, but also allows excess trapped air to spontaneously disperse upwards, forming an air isolation layer above the release film through the high borosilicate glass substrate and the composite release film, facilitating demolding.

[0013] Furthermore, the auxiliary heat dissipation component includes a vertical straight-flow pipe fitting, which is inserted into the outside of the air supply pipe and fixed with screws. The inner side of the vertical straight-flow pipe fitting is provided with an air flow channel with an inverted L-shaped cross-section. An air receiving box is provided at the bottom of the vertical straight-flow pipe fitting. The air receiving box is a square hollow box. The top of the air receiving box is connected to the air flow channel. A number of square protrusions are provided on one side of the air receiving box, and the center of the square protrusions has a hole structure and communicates with the internal space of the air receiving box.

[0014] Furthermore, the radiator is a finned radiator, the block-shaped protrusion is inserted between adjacent fins of the radiator, and the opening of the hole structure is perpendicular to the direction of the fins.

[0015] Furthermore, the platform is a double-layered plate-like splicing structure with a square hole through the middle of each layer. The upper splicing plate has a thin film groove for supporting the composite release film, and the lower splicing plate has arc-shaped support plates fixed at the four corners of the square hole for supporting the high borosilicate glass support plate. The upper and lower double-layered plate-like splicing structures are both horizontally provided with columnar limiting grooves. The vibration-assisted release component is disposed inside the two columnar limiting grooves, and a vertical columnar mounting groove is also provided at one end of the columnar limiting groove. The columnar mounting groove is connected to the columnar limiting groove, and the other end of the columnar limiting groove is connected to the square hole.

[0016] Furthermore, the vibration-assisted detachment component is an ultrasonic vibrator, which consists of an ultrasonic transducer and an ultrasonic amplitude transformer. One end of the ultrasonic amplitude transformer is connected to the side of the high borosilicate glass support plate. The ultrasonic amplitude transformer is embedded in the cylindrical limiting groove and is movably connected. The ultrasonic transducer is installed in the cylindrical mounting groove.

[0017] Furthermore, the composite release membrane has a plurality of micropores arrayed on it, the diameter of which is between 10 and 15 nm.

[0018] Furthermore, compared to full-coverage film, composite release film has less centrifugal force, and the micropores on the film allow oxygen to pass through. After the oxygen permeates the upper surface of the composite release film, it can form an airflow barrier layer between the contact surface between the printed product and the composite release film. Therefore, the formed printed product does not directly contact the composite release film, thereby increasing the separation speed between the printed product and the release film.

[0019] Furthermore, the model generates a large amount of heat during the molding process. Air passes through the micropores on the composite release film, carrying away some of the heat from the release film to achieve an air cooling effect. This indirectly increases the printing speed of the photopolymer 3D printing equipment in this solution by 1.2 to 1.3 times compared to conventional single-layer release film printers.

[0020] Furthermore, the high borosilicate glass substrate has an array of micropores, the diameter of which is between 0.02 mm and 0.1 mm.

[0021] Furthermore, while composite release films can improve the speed of model release, they cannot solve the problem of the release film being pulled up when the printed product is released. Because the release film is stretched too taut and then released again, the central area of ​​the release film is concave, making it difficult to achieve large-area printing. The optimal printing area is still the central area of ​​the release film, and the printing efficiency is low. By bonding the composite release film to a transparent borosilicate glass substrate, the composite release film is prevented from being pulled up by the printed product, thereby increasing the actual printing area and achieving the purpose of large-area printing. In addition, the synergistic effect of the micropores on the substrate and the composite release film reduces the adhesion between the printed product and the composite release film, so that the printing efficiency is not affected by the large adhesion when printing large areas.

[0022] Beneficial effects: This invention is reasonably designed and has the following beneficial effects:

[0023] 1. In the present invention, the composite release film synergistic demolding structure improves the peeling efficiency by adopting a two-layer composite structure of polyurea polymer film + colorless polyimide film. The upper polyurea film, with its high elasticity, forms an elastic buffer layer during the lifting process of the printed product, preventing the release film surface from cracking due to stress concentration. The lower polyimide film provides rigid support, suppresses excessive deformation of the release film, and ensures the stability of the printed area.

[0024] 2. In the present invention, the surface coating is designed to form a functional zone with low surface energy in the center and high adhesion at the edges. The fluorosilicone coating containing silica nanoparticles in the central area significantly reduces the resin adhesion. The high adhesion generated by the edge acrylate coating through chemical anchoring ensures that the printing resin and the edge of the composite release film are fixed, preventing overall peeling and effectively increasing the actual printing area. In conjunction with the microporous structure on the film, the oxygen that permeates during the printing process forms an air film barrier layer on the contact surface, reducing the peeling force to one-third of that of traditional release films, achieving tear-free and rapid demolding.

[0025] 3. In this invention, vibration-assisted demolding and micro-ventilation are coupled to enhance the integrity of demolding. The vibration-assisted demolding component periodically transmits vibration to the borosilicate glass substrate through an ultrasonic vibrator, causing high-frequency vibration on the surface of the borosilicate glass substrate, which breaks the mechanical interlock between the model and the substrate. At the same time, the micropores on the substrate with matching diameters and the micropores on the film form a through ventilation path. When printing is completed, the lifting module drives the forming stage to rise, and the microporous structure quickly balances the air pressure difference between the film and the substrate, avoiding model residue caused by vacuum adsorption.

[0026] 4. In the present invention, the directional heat dissipation system optimizes the ventilation component of the photocuring environment and the auxiliary heat dissipation component to construct a three-dimensional heat dissipation channel. A small air pump inputs filtered air into the curing mechanism through a straight pipe and distributes it evenly to the curing area through the air inlet pipe. The inverted L-shaped airflow channel of the auxiliary heat dissipation component guides the airflow vertically through the finned heat sink. The square protrusions are embedded in the gaps between the fins to form a high-speed airflow zone, so that the surface temperature of the DLP light source and the heat sink is stably controlled at a low level. This not only extends the life of the light source, but also significantly improves the dimensional accuracy of the printed parts by controlling the temperature gradient of the substrate, effectively solving the problems of resin viscosity changes and component warping caused by high temperature.

[0027] 5. In this invention, the microporous cooling and large-area printing adaptability breakthrough of the composite release film and the high borosilicate substrate form a passive heat dissipation + active air cooling composite system. When air flows through the micropores, it can carry away some of the residual heat from curing on the surface of the release film, shortening the curing time of single-layer printing and improving the overall printing speed. At the same time, the rigid support of the substrate firmly fixes the release film on the surface and maintains a constant position. Combined with the anchoring effect of the edge coating, the effective printing area expands from a center radius of 100mm to the full width, meeting the molding requirements of large-size components and filling the performance gap of traditional flexible release film platforms in large-area printing.

[0028] 6. In the present invention, the microporous array of the high borosilicate glass substrate and the composite release film forms a through-ventilation structure. When the forming stage rises after printing, the outside air is filtered by the dust cover of the protective plate and then quickly forms an air isolation layer with a thickness of about 5-10μm between the upper surface of the composite release film and the bottom surface of the printed product through the airflow path driven by a small air pump. This isolation layer enhances demolding performance through a dual mechanism: Firstly, the small-diameter micropores allow oxygen molecules to preferentially permeate, inhibiting excessive cross-linking of the resin on the release film surface during photopolymerization, forming a low-adhesion interface layer with a thickness of approximately 20-50 μm. This reduces the effective contact area between the printed product and the release film from 95% in traditional fully laminated structures to below 40%. Secondly, when the forming stage moves the model upwards, the diameter difference between the micropores on the plate and the micropores on the film creates an air pressure gradient. Air is quickly replenished to the peeling interface through the micropores, avoiding model adhesion caused by vacuum adsorption. Combined with the low-frequency vibration of the vibration-assisted demolding component, the demolding time for complex curved surface models can be shortened, and the edge damage rate of the model during peeling can be reduced. It is especially suitable for precision components with barbs and deep cavity structures. Through the synergistic effect of air film support and interface weakening of the air isolation layer, complete demolding without tearing or residue is achieved, significantly improving the finished product qualification rate and production efficiency of photopolymer 3D printing. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of the present invention;

[0030] Figure 2 This is a partial structural diagram of the present invention;

[0031] Figure 3 This is a schematic diagram of the platform structure of the present invention;

[0032] Figure 4 This is an enlarged view of a portion of structure A of the present invention;

[0033] Figure 5 This is a schematic diagram of the composite release membrane structure of the present invention;

[0034] Figure 6 This is a schematic diagram of the ventilation component structure of the present invention;

[0035] Figure 7 This is a schematic diagram of the auxiliary heat dissipation component structure of the present invention;

[0036] Figure 8 This is a cross-sectional view of the auxiliary heat dissipation component structure of the present invention;

[0037] Figure 9 This is a cross-sectional view of the vibration-assisted detachment component of the present invention.

[0038] In the diagram: 1-Workbench, 2-Forming table, 3-Lifting module;

[0039] 11-Tablet, 12-Printing module, 13-Curing mechanism, 14-Ventilation component, 15-Auxiliary heat dissipation component;

[0040] 1101-Upper splicing plate, 1102-Lower splicing plate, 1103-Square hole, 1104-Film embedding groove, 1105-Arc-shaped support plate, 1106-Columnar limiting groove, 1107-Columnar mounting groove, 1201-Material trough, 1202-Composite release film, 1203-High borosilicate glass support plate, 1204-Vibration assisted release component, 1301-Enclosed mounting frame, 1302-DLP light source, 1303-Radiator, 1401-Inlet pipe row, 1402-Outlet pipe row, 1403-Straight pipe fitting, 1404-Small air pump, 1405-Dust cover, 1501-Vertical straight pipe fitting, 1502-Air flow channel, 1503-Air collection box, 1504-Square protrusion;

[0041] 12021-Polyurea polymer film, 12022-Colorless polyimide film, 12023-Fluorosilicone coating containing silica nanoparticles, 12024-Acrylic coating, 12025-Micropores on film, 12031-Micropores on plate, 12041-Ultrasonic transducer, 12042-Ultrasonic amplitude transformer, 12043-Rubber gasket, 12044-Fastening ring, 12045-Spring, 12046-Small vibration motor, 12047-Eccentric block. Detailed Implementation

[0042] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0043] In the description of this invention, it should be understood that the terms "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0044] Combination Figures 1 to 9The 3D printing platform shown includes a complete demolding mechanism, a worktable 1, a molding stage 2, and a lifting module 3. The worktable 1 includes a table plate 11, a printing module 12, and a curing mechanism 13. It also includes a bracket, a protective plate, and feet arranged on the outside of the worktable 1. The curing mechanism 13 includes a closed mounting frame 1301, a DLP light source 1302, and a heat sink 1303. The printing module 12 includes a material trough 1201, a composite release film 1202, a high borosilicate glass support plate 1203, and a vibration-assisted demolding component 1204 arranged sequentially from top to bottom. The bottom surface of the composite release film 1202 is bonded to the upper surface of the high borosilicate glass support plate 1203. The worktable 1 also includes a ventilation component 14 and an auxiliary heat dissipation component 15, which are respectively installed on both sides of the closed mounting frame 1301.

[0045] Combination Figures 2 to 4 As shown, the platform 11 has a double-layered plate-like splicing structure with a square hole 1103 through the middle of each layer. The upper splicing plate 1101 has a thin film groove 1104 for supporting the composite release film 1202. The lower splicing plate 1102 has arc-shaped support plates 1105 fixed at the four corners of the square hole 1103 for supporting the high borosilicate glass support plate 1203. The upper and lower double-layered plate-like splicing structure has horizontally arranged cylindrical limiting grooves 1106 that are thick at both ends and thin in the middle. The vibration-assisted release component 1204 is arranged inside the two cylindrical limiting grooves 1106. A vertical cylindrical mounting groove 1107 is also opened at one end of the cylindrical limiting groove 1106. The cylindrical mounting groove 1107 is connected to the cylindrical limiting groove 1106. The other end of the cylindrical limiting groove 1106 is connected to the square hole 1103.

[0046] Combination Figure 5 As shown, the composite release film 1202 includes an upper polyurea polymer film 12021 and a lower colorless polyimide film 12022. The polyurea polymer film 12021 and the colorless polyimide film 12022 are bonded together. The central area of ​​the upper surface of the polyurea polymer film 12021 is coated with a fluorosilicone coating 12023 containing silica nanoparticles. The edge area of ​​the upper surface of the polyurea polymer film 12021 is also coated with an acrylic coating 12024. The area of ​​the polyurea polymer film 12021 is larger than the area of ​​the colorless polyimide film 12022.

[0047] Combination Figure 2 and Figure 6As shown, the ventilation assembly 14 includes an air inlet pipe row 1401 and an air outlet pipe row 1402. The air inlet pipe row 1401 and the air outlet pipe row 1402 are respectively installed on both sides of the enclosed mounting frame 1301 and penetrate its side wall. A straight pipe fitting 1403 is inserted into the outside of the air inlet pipe row 1401 and fixed with screws. The straight pipe fitting 1403 is used to gather multiple pipes of the air inlet pipe row 1401 into a single pipe opening. A small air pump 1404 is provided on the lower side of the air inlet pipe row 1401, and the output end of the small air pump 1404 is connected to the pipe opening of the straight pipe fitting 1403 through a pipe. A dust cover 1405 is provided on the outside of the input end of the small air pump 1404 and is connected to it through a pipe. The dust cover 1405 penetrates the outer protective plate of the workbench 1 and is fixed with screws and connectors.

[0048] Combination Figure 2 and Figure 7 As shown, the auxiliary heat dissipation component 15 includes a vertical straight pipe fitting 1501, which is inserted into the outside of the air supply pipe array 1402 and fixed with screws. The vertical straight pipe fitting 1501 has an air flow channel 1502 with an inverted L-shaped cross-section on its inner side. An air receiving box 1503 is provided at the bottom of the vertical straight pipe fitting 1501. The air receiving box 1503 is a square hollow box. The top of the air receiving box 1503 is connected to the air flow channel 1502. A number of square protrusions 1504 are provided on one side of the air receiving box 1503. The square protrusions 1504 have a hole structure in the middle and are connected to the internal space of the air receiving box 1503.

[0049] Combination Figure 2 and Figure 7 As shown, the radiator 1303 is a finned radiator, with a square protrusion 1504 inserted between adjacent fins of the radiator 1303, and the opening of the hole structure is set perpendicular to the direction of the fins.

[0050] Combination Figure 3 , Figure 4 and Figure 9 As shown, the platform 11 has a double-layered plate-like splicing structure with square holes 1103 through the middle of each layer. The upper splicing plate 1101 has a film groove 1104 for supporting the composite release film 1202. The lower splicing plate 1102 has arc-shaped support plates 1105 fixed at the four corners of the square holes 1103 for supporting the high borosilicate glass support plate 1203. The upper and lower double-layered plate-like splicing structures have horizontally arranged columnar limiting grooves 1106 inside. The vibration-assisted release component 1204 is set inside the two columnar limiting grooves 1106. One end of the columnar limiting groove 1106 also has a vertical columnar mounting groove 1107. The columnar mounting groove 1107 is connected to the columnar limiting groove 1106, and the other end of the columnar limiting groove 1106 is connected to the square hole 1103.

[0051] Combination Figure 9As shown, the vibration-assisted detachment component 1204 is an ultrasonic vibrator, which consists of an ultrasonic transducer 12041 and an ultrasonic amplitude transformer 12042. One end of the ultrasonic amplitude transformer 12042 is connected to the side of the high borosilicate glass support plate 1203. The ultrasonic amplitude transformer 12042 is embedded in the cylindrical limiting groove 1106 and is movably connected. The ultrasonic transducer 12041 is installed in the cylindrical mounting groove 1107.

[0052] Combination Figure 5 As shown, a plurality of micropores 12025 are arrayed on the composite release membrane 1202, and the diameter of the micropores 12025 is between 10 and 15 nm.

[0053] Combination Figure 2 and Figure 9 As shown, a number of microholes 12031 are arrayed on the high borosilicate glass substrate 1203, and the diameter of the microholes 12031 is between 0.02mm and 0.1mm.

[0054] Working principle: During use, the fluorosilicone coating 12023 of the polyurea film 12021 on the composite release film 1202 reduces resin adhesion through its low surface energy characteristics, while the high adhesion generated by the edge acrylate coating 12024 through chemical anchoring ensures that the printing resin is fixed to the edge of the composite release film 1202, preventing the whole from lifting up.

[0055] During the printing process, air permeates upward through the micropores 12031 on the high borosilicate glass substrate 1203 and the micropores 12025 on the composite release film, forming a 5-10μm thick air isolation layer at the resin-release film interface, inhibiting excessive cross-linking of the interface and reducing the peel strength to below 1.5N / cm.

[0056] The ultrasonic vibrator periodically transmits the vibration to the side of the high borosilicate glass substrate, converting it into high-frequency vibration, which disrupts the mechanical engagement between the model and the substrate.

[0057] When the molding platform 2 lifts the model upwards, a pressure difference is created between the micropores on the plate and the micropores on the membrane. Outside air is quickly replenished to the release interface through the ventilation component 14, balancing the vacuum adsorption force and preventing the model from sticking to the release membrane due to negative pressure. With the combined effect of these two factors, the demolding force of complex structure models is reduced by more than 60% compared to traditional platforms.

[0058] The heat generated by the DLP light source 1302 during operation is initially absorbed by the finned heat sink 1303. The vertical straight pipe 1501 of the auxiliary heat dissipation component 15 guides the airflow vertically through the heat sink fins via the inverted L-shaped airflow channel 1502. The square protrusion 1504 of the air box 1503 is embedded in the gap between the fins to form a high-speed airflow zone of 2-3m / s, which stably controls the surface temperature of the lamp array at 55±5℃, avoiding abnormal resin viscosity and model warping caused by high temperature.

[0059] The small air pump 1404 draws in air from the outside through the dust cover 1405, and collects it through the straight pipe 1403 to the air inlet pipe 1401, which is then evenly supplied to the curing area. After heat exchange, the air enters the auxiliary heat dissipation component through the air outlet pipe 1402, carrying the heat from the radiator and being discharged through the perforated structure of the air receiver, forming a closed-loop airflow system of "air intake filtration - area cooling - directional heat dissipation". The air exchange rate reaches 5-8 m3 per minute, ensuring that the temperature gradient of the printing environment is ≤3℃ / mm.

[0060] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the invention can be implemented in other specific forms without departing from its spirit or essential characteristics. Therefore, the embodiments should be considered in all respects as exemplary and non-limiting, and the scope of the invention is defined by the appended claims rather than the foregoing description. Thus, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within the present invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0061] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A complete demolding 3D printing platform, comprising a worktable (1), a molding stage (2), and a lifting module (3), wherein the worktable (1) comprises a table plate (11), a printing module (12), and a curing mechanism (13), and further comprises a bracket, a protective plate, and support legs disposed on the outside of the worktable (1), wherein the curing mechanism (13) comprises a closed mounting frame (1301), a DLP light source (1302), and a heat sink (1303), characterized in that: The printing module (12) includes a material trough (1201), a composite release film (1202), a high borosilicate glass support plate (1203), and a vibration-assisted release component (1204) arranged sequentially from top to bottom. The bottom surface of the composite release film (1202) is bonded to the upper surface of the high borosilicate glass support plate (1203). The worktable (1) also includes a ventilation component (14) and an auxiliary heat dissipation component (15). The ventilation component (14) and the auxiliary heat dissipation component (15) are respectively installed on both sides of the closed mounting frame (1301). The composite release film (1202) includes an upper polyurea polymer film (12021) and a lower colorless polyimide film (12022). The polyurea polymer film (12021) and the colorless polyimide film (12022) are bonded together after being laminated. The central area of ​​the upper surface of the polyurea polymer film (12021) is coated with a fluorosilicone coating (12023) containing silica nanoparticles. The edge area of ​​the upper surface of the polyurea polymer film (12021) is also coated with an acrylic coating (12024). The area of ​​the polyurea polymer film (12021) is larger than the area of ​​the colorless polyimide film (12022).

2. The 3D printing platform for complete demolding according to claim 1, characterized in that: The platform (11) is a double-layered plate-like splicing structure with a square hole (1103) through the middle of each layer. The upper splicing plate (1101) has a thin film groove (1104) for supporting the composite release film (1202). The lower splicing plate (1102) has arc-shaped support plates (1105) fixed at the four corners of the square hole (1103) for supporting the high borosilicate glass support plate (1203). The upper and lower double-layered plate-like splicing structure contains... Each part is provided with a horizontal cylindrical limiting groove (1106). The vibration-assisted release component (1204) is disposed inside the two cylindrical limiting grooves (1106). One end of the cylindrical limiting groove (1106) is also provided with a vertical cylindrical mounting groove (1107). The cylindrical mounting groove (1107) is connected to the cylindrical limiting groove (1106). The other end of the cylindrical limiting groove (1106) is connected to the square hole (1103).

3. The 3D printing platform for complete demolding according to claim 2, characterized in that: The ventilation assembly (14) includes an intake pipe row (1401) and an outlet pipe row (1402). The intake pipe row (1401) and the outlet pipe row (1402) are respectively installed on both sides of the enclosed mounting frame (1301) and penetrate its side wall. A straight pipe fitting (1403) is inserted into the outside of the intake pipe row (1401) and fixed with screws. The straight pipe fitting (1403) is used to connect multiple pipes of the intake pipe row (1401). The air intake pipe (1401) is connected to the same port. A small air pump (1404) is provided below the side of the air intake pipe (1401). The output end of the small air pump (1404) is connected to the port of the straight pipe fitting (1403) through a pipe. The input end of the small air pump (1404) is provided with a dust cover (1405) and is connected through a pipe. The dust cover (1405) penetrates the outer protective plate of the workbench (1) and is fixed to the connector with screws.

4. The 3D printing platform for complete demolding according to claim 3, characterized in that: The auxiliary heat dissipation component (15) includes a vertical straight pipe fitting (1501), which is inserted into the outside of the air supply pipe (1402) and fixed with screws. The vertical straight pipe fitting (1501) has an air flow channel (1502) with an inverted L-shaped cross-section on the inner side. The vertical straight pipe fitting (1501) has an air collection box (1503) at the bottom. The air collection box (1503) is a square hollow box. The top of the air collection box (1503) is connected to the air flow channel (1502). The air collection box (1503) has several square protrusions (1504) on one side. The square protrusions (1504) have a hole structure in the middle and are connected to the internal space of the air collection box (1503).

5. The 3D printing platform for complete demolding according to claim 4, characterized in that: The radiator (1303) is a finned radiator, and the block-shaped protrusion (1504) is inserted between adjacent fins of the radiator (1303), and the opening of the hole structure is set perpendicular to the direction of the fins.

6. The 3D printing platform for complete demolding according to claim 5, characterized in that: The vibration-assisted detachment component (1204) is an ultrasonic vibrator, which consists of an ultrasonic transducer (12041) and an ultrasonic amplitude transformer (12042). One end of the ultrasonic amplitude transformer (12042) is connected to the side of the high borosilicate glass support plate (1203). The ultrasonic amplitude transformer (12042) is embedded in the cylindrical limiting groove (1106) and movably connected. The ultrasonic transducer (12041) is installed in the cylindrical mounting groove (1107).

7. A 3D printing platform for complete demolding according to claim 6, characterized in that: The composite release membrane (1202) has a plurality of membrane micropores (12025) arrayed on it, and the diameter of the membrane micropores (12025) is between 10 and 15 nm.

8. The 3D printing platform for complete demolding according to claim 7, characterized in that: The high borosilicate glass substrate (1203) has a plurality of microholes (12031) arranged in an array on it, and the diameter of the microholes (12031) is between 0.02mm and 0.1mm.

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