A light-cured 3D printer

Abstract

This utility model relates to the technical field of photopolymer 3D printing equipment, and particularly to a photopolymer 3D printer. The device includes a base, a material tank, a light path module, a lifting platform, a forming module, and a quick-release fixing assembly. The light path module is embedded inside the base, with its exposure surface facing upwards and lower than the top surface of the base; the material tank is located above the base, with its bottom corresponding to the exposure surface of the light path module; the lifting platform is installed above the base, and the quick-release fixing assembly connects the forming module and the lifting platform. The surface of the forming module near the material tank has several recessed grooves extending in a direction perpendicular to the plane of the forming module. The cross-sectional profile of these grooves is composed of a first sidewall, an arc-shaped bottom wall, and a second sidewall that are smoothly connected sequentially. The first and second sidewalls are symmetrically distributed, and the arc-shaped bottom wall is a circular arc structure protruding away from the outer surface of the forming module. This structure improves model adhesion and facilitates model peeling, thereby improving printing stability and efficiency.

Description

Technical Field

[0001] This utility model relates to the field of photopolymer 3D printing equipment technology, and in particular to a photopolymer 3D printer. Background Technology

[0002] In the field of photopolymer 3D printing technology, the forming module, as the supporting foundation for model forming, directly affects the stability of the printing process and the quality of the final product. Traditional photopolymer printer forming modules mostly adopt a flat, smooth surface design. While this design can meet basic load-bearing requirements, the weak adhesion between the model and the board surface makes it prone to model detachment, leading to printing failure. This not only wastes printing material but also significantly reduces printing efficiency.

[0003] To address this issue, some equipment employs methods such as sandblasting or chemical etching to modify the surface of the molding module. These treatments increase the surface roughness, thereby improving the adhesion between the model and the board and reducing the risk of detachment during the initial printing phase.

[0004] However, the aforementioned methods for enhancing adhesion have certain drawbacks. On the one hand, sandblasting or chemical etching processes generate residues that adhere to the gaps in the board surface, making them difficult to clean and accumulating over time, which can affect the accuracy and quality of subsequent printing. On the other hand, such treatments are destructive processes on the surface of the molding module, causing irreversible damage to the board surface.

[0005] Therefore, it is evident that, in the current use of photopolymer printer molding modules, achieving an effective balance between ensuring sufficient adhesion between the model and the board surface during printing to prevent detachment, and being able to easily and without damage remove the model from the board surface after printing, is a technical problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0006] To overcome the shortcomings of the existing technology, this utility model provides a photopolymerization 3D printer, including a base, a material tank, an optical path module, a lifting platform, a molding module, and a quick-release fixing component;

[0007] The optical path module is embedded inside the base, with its exposure surface facing upwards and lower than the top surface of the base; the material pool is located above the base, with its bottom corresponding to the exposure surface of the optical path module; the lifting platform is installed above the base, and the quick-release fixing assembly connects the molding module and the lifting platform to achieve detachable fixing between the molding module and the lifting platform;

[0008] The molding module has several recessed grooves on one side surface near the material pool. The recessed grooves extend in a direction perpendicular to the plane of the molding module. The cross-sectional profile of the recess is composed of a first sidewall, an arc-shaped bottom wall, and a second sidewall that are connected smoothly in sequence. The first sidewall and the second sidewall are symmetrically distributed. The arc-shaped bottom wall is a circular arc structure that protrudes away from the outer surface of the molding module.

[0009] The material pool comprises, from top to bottom, an upper pool body, a fixed pressure plate, a release film, and a lower pool body. The release film is laid at the top opening of the lower pool body, and the fixed pressure plate is located above the edge of the release film. Multiple threaded holes are provided at the corresponding positions of the upper pool body, the lower pool body, the fixed pressure plate, and the edge of the release film. The upper pool body, the fixed pressure plate, the release film, and the lower pool body are fixedly connected in sequence by screws.

[0010] Based on the above scheme, the center distance between adjacent recessed grooves is further 0.1-0.5mm.

[0011] Based on the above scheme, the distance between the arc-shaped bottom wall and the reference surface of the molding module is 0.1mm to 0.5mm.

[0012] Based on the above solution, the output end of the lifting platform is further provided with a connecting rod, the connecting rod is provided with a rotation adjustment part, and the quick-release fixing assembly is provided with an open slot, the slot can be used to allow the rotation adjustment part to pass through, and by rotating the rotation adjustment part, the rotation adjustment part can be tightly abutted against the inner wall of the slot, thereby fixing the connecting rod and the quick-release fixing assembly.

[0013] Based on the above solution, the quick-release fixing assembly further includes an upper end face and a left end face and a right end face symmetrically arranged on both sides of the upper end face. The lower surface of the upper end face is provided with at least one groove. The connecting rod is provided with at least one protrusion that matches the groove, so that the protrusion can form a sliding engagement with the groove in the horizontal direction.

[0014] Based on the above solution, the base is further provided with at least two longitudinal threaded holes on its upper part, and the outer peripheral wall of the material pool is provided with through holes corresponding to the positions of the threaded holes. By passing fasteners through the through holes and screwing them into the threaded holes, the material pool and the base can be detachably connected.

[0015] Based on the above scheme, further, the surface of the molding module near the material pool is provided with periodically repeating micro-concave patterns; the micro-concave patterns are periodically arranged polygons, including pentagons or hexagons.

[0016] Based on the above solution, the quick-release fixing component is further detachably connected to the molding module through right-angle connectors on its left and right sides. The right-angle connectors are bent and have a first connecting part and a second connecting part that are perpendicular to each other.

[0017] The first connecting part is fixedly connected to the left or right end face of the quick-release fixing component by fastening screws, and the second connecting part is attached to the side surface of the molding module facing the quick-release fixing component, and the second connecting part is tightly attached and fixed to the molding module by fastening screws.

[0018] Based on the above scheme, furthermore, a gripping part is provided on each of the two outer walls of the material pool to facilitate hand operation.

[0019] Based on the above solution, a liquid level adjustment module is further included. The liquid level adjustment module includes a control component, a liquid level detector electrically connected to the control component, and a feeding channel located above the material pool. The liquid level detector is used to detect the liquid level of the material in the material pool and input the detected liquid level signal to the control component. When the liquid level signal value received by the control component is less than a preset value, the control component controls the feeding channel to transport material to the material pool.

[0020] Compared with existing technologies, the photopolymer 3D printer provided by this utility model, through the design of a recessed groove with a specific geometric configuration on the surface of the molding module, combined with the synergistic effect of the quick-release fixing components, utilizes the capillary force generated by the recessed groove to enhance the contact area between the resin and the molding surface during the printing stage, significantly improving the adhesion of the model curing and effectively preventing the model from shifting or falling off. The arc-shaped bottom wall structure of the recessed groove avoids the stress concentration phenomenon at the sharp corner of the traditional V-shaped groove, and promotes the uniform diffusion of separation stress along the smooth sidewall during model peeling, facilitating model peeling. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 A schematic diagram of the overall structure of an embodiment of the photopolymer 3D printer provided by this utility model;

[0023] Figure 2 A side view of an embodiment of the photopolymer 3D printer provided by this utility model;

[0024] Figure 3A structural diagram of the molding module of an embodiment of the photopolymer 3D printer provided by this utility model;

[0025] Figure 4 This is an enlarged view of section A of an embodiment of the photopolymer 3D printer provided by this utility model;

[0026] Figure 5 An exploded view of the material tank structure of an embodiment of the photopolymer 3D printer provided by this utility model;

[0027] Figure 6 A structural diagram of the surface pattern of the molding module in an embodiment of the photopolymer 3D printer provided by this utility model.

[0028] Figure label:

[0029] 10. Base, 11. Threaded hole, 12. Grip part

[0030] 20. Material tank, 21. Upper tank body, 22. Fixed pressure plate, 23. Release film, 24. Lower tank body.

[0031] 30 optical path modules

[0032] 40 Lifting platform, 41 Connecting rod, 42 Rotation adjustment part, 43 Protrusion,

[0033] 50 Molding module, 51 Recessed groove, 52 First sidewall, 53 Arc-shaped bottom wall, 54 Second sidewall, 55 Micro-recessed pattern,

[0034] 60 Quick-release fixing component, 61 Slot, 62 Top end face, 63 Left end face, 64 Right end face, 65 Groove, 66 Right angle connector, 67 First connecting part, 68 Second connecting part, 69 Oblong hole,

[0035] 70 Detection tank, 71 Liquid level detector, 72 Inlet, 73 Inlet pipe, 74 Electrically controlled valve. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0037] In the description of this utility model, it should be noted that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description. They 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, and therefore should not be construed as a limitation on this utility model. In addition, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] To provide a 3D printer that ensures sufficient adhesion between the model and the printing plate during the printing process to prevent detachment, and that allows for easy and damage-free removal of the model from the printing plate after printing, this utility model provides such a printer. Figure 1-5 The photopolymer 3D printer shown.

[0039] This 3D printer, such as Figure 1 As shown, it includes a base 10, a material pool 20, an optical path module 30, a lifting platform 40, a forming module 50, and a quick-release fixing assembly 60;

[0040] The optical path module 30 is embedded inside the base 10, with its exposure surface facing upwards and lower than the top surface of the base 10; the material pool 20 is positioned above the base 10, with its bottom corresponding to the exposure surface of the optical path module 30; the lifting platform 40 is mounted above the base 10, and the quick-release fixing assembly 60 connects the molding module 50 and the lifting platform 40 to achieve detachable fixing between the molding module 50 and the lifting platform 40;

[0041] Among them, such as Figure 3-4 As shown, the molding module 50 has a plurality of recessed grooves 51 on one side surface near the material pool 20. The recessed grooves 51 extend in a direction perpendicular to the plane of the molding module. The cross-sectional profile of the recess is composed of a first side wall 52, an arc-shaped bottom wall 53 and a second side wall 54 connected in sequence. The first side wall 52 and the second side wall 54 are symmetrically distributed. The arc-shaped bottom wall 53 is an arc structure that protrudes away from the outer surface of the molding module 50.

[0042] Specifically, in use, the operator assembles the molding module 50 onto the lifting platform 40 via the quick-release fixing component 60, with the side of the molding module 50 having the recessed groove 51 facing the bottom of the material tank 20. The material tank 20, filled with photosensitive resin, is placed above the base 10. The optical path module 30 emits an ultraviolet beam upwards, which passes through the bottom of the material tank 20 to cure the resin. The arc-shaped bottom wall 53 of the recessed groove 51 guides the resin to form an anchor-like curing structure, enhancing the interlayer bonding force. After printing, the lifting platform 40 lifts the model away from the material tank 20. The operator uses a spatula to cut along the edge of the molding module 50. The recessed groove 51 disperses the peeling stress, allowing the model to detach completely without any residue remaining in the groove.

[0043] It should be noted that the optical path module 30 is existing technology, and those skilled in the art can implement it using existing optical path modules 30 based on the concept of this utility model.

[0044] like Figure 5 As shown, the material pool 20 includes, from top to bottom, an upper pool body 21, a fixed pressure plate 22, a release film 23, and a lower pool body 24. The release film 23 is laid at the top opening of the lower pool body 24, and the fixed pressure plate 22 is located above the edge of the release film 23. At the corresponding positions of the edges of the upper pool body 21, the lower pool body 24, the fixed pressure plate 22, and the release film 23, multiple threaded holes 11 are provided in the vertical direction. The upper pool body 21, the fixed pressure plate 22, the release film 23, and the lower pool body 24 are fixedly connected by screws in sequence.

[0045] The release film 23 is laid at the top opening of the lower tank 24 to support the photosensitive resin and facilitate the smooth peeling of the cured model. The fixing plate 22 is placed over the edge of the release film 23 to press the edge of the release film 23 tightly against the top surface of the lower tank 24, preventing the release film 23 from shifting or lifting during the printing process.

[0046] During assembly, first, lay the release film 23 flat on the top of the lower pool body 24, so that the edge of the release film 23 covers the area of ​​the threaded hole 11 on the lower pool body 24; then, place the fixing plate 22 above the edge of the release film 23, ensuring that the threaded hole 11 on the fixing plate 22 is aligned with the threaded hole 11 on the lower pool body 24; then, fasten the upper pool body 21 to the outside of the lower pool body 24, so that the threaded hole 11 at the bottom of the upper pool body 21 is coaxially aligned with the threaded hole 11 of the fixing plate 22 and the lower pool body 24; finally, screws are passed through the threaded holes 11 of the upper pool body 21 and the fixing plate 22 in sequence, and screwed into the threaded hole 11 of the lower pool body 24, thereby firmly connecting the upper pool body 21, the lower pool body 24, the fixing plate 22 and the release film 23 into one unit.

[0047] This fixed connection structure, achieved through the corresponding threaded hole 11 and screw, not only ensures that the release film 23 remains flat and taut during the printing process, thus ensuring printing accuracy, but also facilitates disassembly and replacement after the release film 23 wears out. Simply unscrew the screws to remove the upper tank body 21 and the fixing plate 22 in sequence, replace the new release film 23, and reassemble. The operation is simple and the connection is stable.

[0048] In one embodiment, such as Figure 4 As shown, the center distance between adjacent recessed grooves 51 is 0.1-0.5 mm.

[0049] Setting the center distance between adjacent recessed grooves 51 to 0.1-0.5mm ensures that there are enough recessed grooves 51 on the surface of the molding module 50 to improve adhesion, while avoiding the decrease in surface structural strength of the molding module 50 due to excessively dense groove distribution, thus further balancing adhesion and ease of peeling.

[0050] In one embodiment, such as Figure 4 As shown, the distance between the arc-shaped bottom wall 53 and the reference surface of the molding module 50 is 0.1 mm to 0.5 mm.

[0051] The distance between the arc-shaped bottom wall 53 and the reference surface of the molding module 50 is set to 0.1mm to 0.5mm, which reasonably controls the depth of the recessed groove 51. This increases the contact area and mechanical interlocking with the model through an appropriate recessed depth, ensuring sufficient adhesion, while avoiding the model being too deeply embedded and difficult to peel off due to excessive depth. At the same time, it helps to reduce resin residue in the groove during the printing process.

[0052] In one embodiment, such as Figure 1 As shown, the output end of the lifting platform 40 is provided with a connecting rod 41, and the connecting rod 41 is provided with a rotation adjustment part 42. The quick-release fixing assembly 60 is provided with an open slot 61, and the slot 61 allows the rotation adjustment part 42 to pass through it. By rotating the rotation adjustment part 42, the rotation adjustment part 42 can be tightly abutted against the inner wall of the slot 61, thereby fixing the connecting rod 41 to the quick-release fixing assembly 60.

[0053] A connecting rod 41 is provided at the output end of the lifting platform 40. The rotation adjustment part 42 on the connecting rod 41 cooperates with the open slot 61 of the quick-release fixing component 60. The two are tightly abutted and fixed by rotating the adjustment part 42. This structure is not only simple to operate, but also can be fixed and disassembled by simply rotating the adjustment part 42. Moreover, the connection is stable and can effectively prevent the forming module 50 from loosening or shifting during the printing process, thus improving the stability of the equipment operation.

[0054] In one embodiment, such as Figure 1 and Figure 3 As shown, the quick-release fixing assembly 60 includes an upper end face 62 and a left end face 63 and a right end face 64 symmetrically arranged on both sides of the upper end face 62. The lower surface of the upper end face 62 is provided with at least one groove 65. The connecting rod 41 is provided with at least one protrusion 43 that is adapted to the groove 65, so that the protrusion 43 can form a sliding engagement with the groove 65 in the horizontal direction.

[0055] The upper end face 62 of the quick-release fixing component 60 has a groove 65 on its lower surface, and the connecting rod 41 has a matching protrusion 43. The two form a sliding engagement in the horizontal direction. This structure can achieve quick positioning and guide and limit the connection between the connecting rod 41 and the quick-release fixing component 60, avoiding misalignment during assembly and further improving the accuracy and stability of the connection. At the same time, the sliding engagement method also makes the disassembly process smoother.

[0056] In one embodiment, such as Figure 1 As shown, the base 10 has at least two longitudinal threaded holes 11 on its upper side, and the outer peripheral wall of the material pool 20 has through holes corresponding to the positions of the threaded holes 11. By passing fasteners through the through holes and screwing them into the threaded holes 11, the material pool 20 and the base 10 can be detachably connected.

[0057] In the above scheme, a longitudinal threaded hole 11 is provided on the upper part of the base 10, and a through hole is provided on the outer peripheral wall of the material pool 20. The two are detachably connected by fasteners. This connection method has a simple structure and reliable connection. It not only facilitates the quick disassembly and assembly of the material pool 20 and makes it convenient to perform maintenance operations such as cleaning the inside of the material pool 20 or replacing the release film 23, but also ensures the positional accuracy of the material pool 20 after installation.

[0058] In one embodiment, such as Figure 6 As shown, the surface of the molding module 50 near the material pool 20 is provided with a periodically repeating micro-concave pattern 55.

[0059] Furthermore, the micro-concave pattern 55 is a periodically arranged polygon, and the distance between its bottom wall 53 and the reference surface of the molding module 50 is set to 0.1-0.2mm, preferably pentagonal or hexagonal.

[0060] More preferably, the periodically arranged polygons are interspersed with vertical stripes.

[0061] By adopting the above-mentioned micro-concave pattern 55 structure, the friction of the surface of the molding module 50 can be further increased, the adhesion of the model can be enhanced, and the concave distance of the micro-concave pattern 55 is set to 0.1-0.2mm, which makes it easy to remove the model and avoids resin residue. In addition, it also helps the material to spread and fill quickly on the surface of the molding module 50, shortens the contact reaction time between the material and the molding module 50, thereby improving molding efficiency.

[0062] In one embodiment, such as Figure 1 As shown, the quick-release fixing assembly 60 is detachably connected to the molding module 50 through right-angle connectors 66 on its left and right sides. The right-angle connectors 66 are bent and have a first connecting part 67 and a second connecting part 68 that are perpendicular to each other.

[0063] The first connecting part 67 is fixedly connected to the left end face 63 or the right end face 64 of the quick-release fixing component 60 by fastening screws, and the second connecting part 68 is attached to the side surface of the molding module 50 facing the quick-release fixing component 60, and the second connecting part 68 is tightly attached to the molding module 50 by fastening screws.

[0064] The quick-release fixing component 60 is connected to the molding module 50 through right-angle connectors 66 on the left and right sides. The first connecting part 67 of the right-angle connector 66 is fixed to the quick-release fixing component 60, and the second connecting part 68 is fitted and fixed to the molding module 50. This connection method can not only ensure the connection strength between the molding module 50 and the quick-release fixing component 60, but also achieve uniform force transmission through the structural characteristics of the right-angle connector 66, avoiding component damage caused by excessive local stress. At the same time, the detachable connection method also facilitates the individual replacement or maintenance of the molding module 50.

[0065] Furthermore, such as Figure 2 As shown, the first connecting part 67 has an oblong hole 69 extending along its length. The fastening screw passes through the oblong hole 69 and is screwed into the threaded hole 11 of the quick-release fixing component 60. By adjusting the position of the fastening screw in the oblong hole 69, the position of the right-angle connector 66 in the horizontal direction can be finely adjusted.

[0066] The second connecting part 68 has at least two circular through holes. Correspondingly, the molding module 50 has threaded blind holes that match the positions of the circular through holes. By passing the fixing bolt through the circular through holes and screwing it into the threaded blind holes, the second connecting part 68 and the molding module 50 are tightly fitted and fixed.

[0067] In one embodiment, such as Figure 1 As shown, a gripping part 12 for easy hand operation is provided on each of the two outer walls of the material pool 20.

[0068] In the above scheme, the outer walls on both sides of the material pool 20 are provided with grips 12 for easy hand operation, which makes it convenient for operators to use and improves the convenience and safety of the assembly and disassembly process of the material pool 20.

[0069] In one embodiment, such as Figure 1-3 As shown, it also includes a liquid level regulation module, which includes a control component, a liquid level detector 71 electrically connected to the control component, and a feeding channel located above the material pool 20. The liquid level detector 71 is used to detect the liquid level of the material in the material pool 20 and input the detected liquid level signal to the control component. When the liquid level signal value received by the control component is less than a preset value, the control component controls the feeding channel to deliver material to the material pool 20.

[0070] In the above solution, a liquid level adjustment module is added. The liquid level detector 71 detects the liquid level of the material in the material pool 20 in real time. The control component controls the feeding channel to automatically replenish the material according to the liquid level signal. This can ensure that the liquid level of the material in the material pool 20 is always maintained within the preset range during the printing process, avoiding the impact of low liquid level on printing continuity or causing printing defects, and reducing the workload of manual monitoring and replenishment.

[0071] Furthermore, the signal output terminal of the liquid level detector 71 is connected to the signal input terminal of the control component, and the detected liquid level signal is input to the control component;

[0072] The feeding channel includes a feeding port 72 and a feeding pipe 73. The feeding pipe 73 is equipped with an electrically controlled valve 74. The signal input terminal of the electrically controlled valve 74 is connected to the signal output terminal of the control component, and is used to receive control signals to execute the opening and closing action of the feeding pipe 73.

[0073] When the control component receives a liquid level signal value from the liquid level detector 71 that is less than the preset value, the control component can control the electric valve 74 to open, and the feed pipe 73 to replenish the material pool 20; when the material in the material pool 20 is gradually replenished and reaches the preset value, the liquid level detector 71 sends a liquid level signal to the control component, and the control component receives the liquid level signal and controls the electric valve 74 to close.

[0074] It should be noted that the control component can receive the liquid level signal from the liquid level detector 71, and then control the opening and closing of the electronically controlled valve 74. Those skilled in the art can implement this using existing program control methods based on the concept of this utility model.

[0075] Furthermore, such as Figure 1 and Figure 2 As shown, a detection pool 70 is provided on one side of the material pool 20, and the liquid level detector 71 is located above the detection pool 70 and fixed by screws; the bottom of the detection pool 70 is connected to the material pool 20.

[0076] Using the above scheme, a detection pool 70 is set on one side of the material pool 20 to avoid the liquid level detector 71 interfering with the normal operation of the printing process; the bottom connection ensures that the liquid level of the material pool 20 is consistent with the liquid level of the detection pool 70, ensuring accurate detection results.

[0077] Preferably, the liquid level detector 71 is an infrared liquid level detector 71.

[0078] Although this document frequently uses terms such as base, material pool, optical path module, lifting platform, molding module, and quick-release fixing assembly, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this utility model; interpreting them as any additional limitation would contradict the spirit of this utility model.

[0079] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A photopolymerization 3D printer, characterized in that: Includes a base (10), a material pool (20), an optical path module (30), a lifting platform (40), a molding module (50), and a quick-release fixing component (60); The optical path module (30) is embedded inside the base (10), and the exposure surface of the optical path module (30) is set upward and lower than the top surface of the base (10); the material pool (20) is set above the base (10), and the bottom of the material pool (20) corresponds to the exposure surface of the optical path module (30); the lifting platform (40) is installed above the base (10), and the quick-release fixing assembly (60) connects the molding module (50) and the lifting platform (40) to realize the detachable fixing between the molding module (50) and the lifting platform (40); The molding module (50) has several recessed grooves (51) on one side surface near the material pool (20). The recessed grooves (51) extend in a direction perpendicular to the plane of the molding module. The cross-sectional profile of the recess is composed of a first side wall (52), an arc-shaped bottom wall (53), and a second side wall (54) that are connected smoothly in sequence. The first side wall (52) and the second side wall (54) are symmetrically distributed. The arc-shaped bottom wall (53) is an arc structure that protrudes away from the outer surface of the molding module (50). The material pool (20) includes an upper pool body (21), a fixed pressure plate (22), a release membrane (23), and a lower pool body (24) from top to bottom. The release membrane (23) is laid at the top opening of the lower pool body (24), and the fixed pressure plate (22) is located above the edge of the release membrane (23). At the corresponding positions of the edges of the upper pool body (21), the lower pool body (24), the fixed pressure plate (22), and the release membrane (23), a number of threaded holes (11) are opened in the vertical direction. The upper pool body (21), the fixed pressure plate (22), the release membrane (23), and the lower pool body (24) are fixedly connected by screws in sequence.

2. The photopolymerization 3D printer according to claim 1, characterized in that: In the plurality of the recessed grooves (51), the center distance between adjacent recessed grooves (51) is 0.1-0.5 mm.

3. The photopolymer 3D printer according to claim 1, characterized in that: The distance between the arc-shaped bottom wall (53) and the reference surface of the molding module (50) is 0.1 mm to 0.5 mm.

4. The photopolymerization 3D printer according to claim 1, characterized in that: The output end of the lifting platform (40) is provided with a connecting rod (41), and the connecting rod (41) is provided with a rotation adjustment part (42). The quick-release fixing assembly (60) is provided with an open slot (61). The slot (61) allows the rotation adjustment part (42) to pass through it. By rotating the rotation adjustment part (42), the rotation adjustment part (42) can be tightly abutted against the inner wall of the slot (61), thereby fixing the connecting rod (41) to the quick-release fixing assembly (60).

5. The photopolymerization 3D printer according to claim 4, characterized in that: The quick-release fixing assembly (60) includes an upper end face (62) and a left end face (63) and a right end face (64) symmetrically arranged on both sides of the upper end face (62). The lower surface of the upper end face (62) is provided with at least one groove (65). The connecting rod (41) is provided with at least one protrusion (43) that is adapted to the groove (65) so that the protrusion (43) can form a sliding engagement with the groove (65) in the horizontal direction.

6. The photopolymerization 3D printer according to claim 1, characterized in that: The base (10) is provided with at least two longitudinal threaded holes (11) on its upper part. The outer peripheral wall of the material pool (20) is provided with through holes corresponding to the positions of the threaded holes (11). By passing fasteners through the through holes and screwing them into the threaded holes (11), the material pool (20) and the base (10) can be detachably connected.

7. The photopolymer 3D printer according to claim 1, characterized in that: The molding module (50) has a periodically repeating micro-concave pattern (55) on the side surface near the material pool (20). The micro-concave pattern (55) is a periodically arranged polygon, which includes pentagons or hexagons.

8. The photopolymer 3D printer according to claim 1, characterized in that: The quick-release fixing assembly (60) is detachably connected to the molding module (50) through right-angle connectors (66) on its left and right sides. The right-angle connectors (66) are bent and have a first connecting part (67) and a second connecting part (68) that are perpendicular to each other. The first connecting part (67) is fixedly connected to the left end face (63) or right end face (64) of the quick-release fixing assembly (60) by fastening screws. The second connecting part (68) is attached to the side surface of the molding module (50) facing the quick-release fixing assembly (60). The second connecting part (68) is tightly attached to the molding module (50) by fastening screws.

9. The photopolymerization 3D printer according to claim 1, characterized in that: The material pool (20) has a gripping part (12) recessed on each of its two outer walls to facilitate hand operation.

10. The photopolymerization 3D printer according to claim 1, characterized in that: It also includes a liquid level adjustment module, which includes a control component, a liquid level detector (71) electrically connected to the control component, and a feeding channel located above the material pool (20). The liquid level detector (71) is used to detect the liquid level of the material in the material pool (20) and input the detected liquid level signal to the control component. When the liquid level signal value received by the control component is less than a preset value, the control component controls the feeding channel to deliver material to the material pool (20).

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