An industrial light-curing sunken 3D printer liquid level automatic leveling circulation refilling system

Abstract

The present invention discloses an industrial light-curing sinking 3D printer liquid level automatic leveling circulation refilling system. The industrial light-curing sinking 3D printer liquid level automatic leveling circulation refilling system realizes the zoning management of photosensitive resin, improves the structural rationality and ease of use of the system, realizes the communication between the main tank of the printing material cylinder and the refilling tank, so that the sinking of the forming platform during the printing process will not cause the liquid level of the photosensitive resin in the main tank of the printing material cylinder to decrease, the printing liquid has a fast leveling speed, and can be leveled in real time by utilizing the circulating leveling mechanism, thereby ensuring the printing accuracy and quality. Compared with the traditional sinking 3D printer refilling system, firstly, it can utilize the self-leveling principle, reduce the pressure required in the refilling process, and reduce the complexity and cost of the system; secondly, it can reduce the gap between the forming platform and the liquid surface, reduce the flow of photosensitive resin around the forming platform, and improve the printing stability; thirdly, it can maintain a constant liquid level of the photosensitive resin in the main tank, thereby avoiding the influence of the printing accuracy and quality due to the change of the liquid level.

Description

Technical Field

[0001] The present invention relates to the technical field of light-curing printers, and in particular to an industrial light-curing sinking 3D printer liquid level automatic leveling circulation and refilling system. Background Art

[0002] Stereolithography 3D printing technology uses light to cure photosensitive resin, stacking it layer by layer to form a three-dimensional entity. Stereolithography 3D printing technology has the advantages of fast printing speed, high precision, and good surface quality, and is widely used in industry, medicine, art and other fields. At present, there are two main types of photocuring 3D printing technology: ascending and descending. The ascending type means that the molding platform gradually rises from below the photosensitive resin liquid surface, separates from the liquid surface after each layer is cured, and then descends a certain distance to cure the next layer. The descending type means that the molding platform gradually sinks from above the photosensitive resin liquid surface, contacts the liquid surface after each layer is cured, and then rises a certain distance to cure the next layer.

[0003] Compared with rising 3D printing technology, sinking 3D printing technology has the following advantages: First, it can avoid the tension generated when each layer separates from the liquid surface after solidification, reducing the deformation and breakage of the printed parts; second, it can reduce the generation of bubbles during the printing process and improve the quality of the printed parts; third, it can shorten the curing time of each layer and improve printing efficiency.

[0004] However, the sinking 3D printing technology also has the following problems:

[0005] First, as the build platform sinks, the photosensitive resin level will continue to decrease, resulting in the need to constantly replenish the photosensitive resin during the printing process. Since the photosensitive resin level in the printer tank needs to be kept constant within a certain range, existing sink-type 3D printers need to use a liquid level sensor and a control system to achieve automatic refilling during the printing process, which increases the cost of sink-type 3D printers.

[0006] Second, due to the gap between the molding platform and the liquid surface, the photosensitive resin forms a flow area around the molding platform, affecting the printing accuracy and stability;

[0007] Third, due to the high viscosity of the photosensitive resin, a higher pressure is required during the rehydration process, which indirectly increases the complexity and cost of the system.

[0008] In view of this, an automatic leveling and circulating refilling system for the liquid level of an industrial light-curing sinking 3D printer is designed. Summary of the Invention

[0009] The purpose of the present invention is to provide an industrial light-curing sunken 3D printer liquid level automatic leveling circulation and refilling system to solve the problems existing in the existing sunken 3D printers mentioned in the above background technology.

[0010] To achieve the above-mentioned object, the present invention provides the following technical solution: an industrial light-curing sink-type 3D printer liquid level automatic leveling circulation and liquid replenishment system, comprising a light-curing printer, a sinking tank mounted on the light-curing printer, and an external mounting frame arranged outside the sinking tank;

[0011] The inner wall of the sinking trough is fixedly connected to a first partition, a second partition and a third partition, and the sinking trough is divided into a main groove of the printing cylinder, a self-leveling groove and a liquid replenishing groove by the first partition, the second partition and the third partition;

[0012] A communicating hole is formed in the lower end of the second partition;

[0013] A pump body mounting groove is formed through the front end of the external mounting frame, and a peristaltic pump is mounted on the pump body mounting groove by bolts;

[0014] The light-curing printer is provided with a molding platform lifting mechanism, which includes an actuator cylinder, a lifting frame, a base frame and a molding platform, wherein:

[0015] The executive cylinder is installed on the upper end of the light-curing printer;

[0016] The lifting frame is fixedly connected to the output end of the actuator cylinder;

[0017] The bottom frame is fixedly connected to the bottom of the lifting frame;

[0018] The forming platform is bolted to the top of the chassis;

[0019] The forming platform is movably arranged in the main groove of the printing cylinder.

[0020] Preferably, the height of the first partition is smaller than that of the second partition, and the height of the second partition matches that of the third partition.

[0021] Preferably, the first partition is arranged between the main groove of the printing cylinder and the self-leveling groove, the second partition is arranged between the main groove of the printing cylinder and the liquid replenishing groove, and the third partition is arranged between the self-leveling groove and the liquid replenishing groove. The third partition is arranged perpendicular to the first partition and the second partition.

[0022] Preferably, the output end of the peristaltic pump is connected to an output tube, the input end of the peristaltic pump is connected to an input tube, the output tube is connected to the fluid replenishment tank, and the input tube is connected to the self-leveling tank.

[0023] Preferably, the base frame is in a "sun" shaped structure.

[0024] Preferably, a plurality of drainage holes are provided through the molding platform, and the width and length of the molding platform are respectively smaller than the width and length of the main groove of the printing cylinder.

[0025] Compared with the prior art, the present invention has the following beneficial effects:

[0026] 1. This industrial light-curing sink-type 3D printer's automatic liquid leveling and circulating rehydration system uses a first, second, and third partition plates fixedly connected to the inner wall of the sink trough to divide the sink trough into a main printing tank, a self-leveling tank, and a rehydration tank. This achieves zoning management of the photosensitive resin and improves the system's structural rationality and ease of use. At the same time, the present invention provides a connecting hole through the lower end of the second partition plate to achieve communication between the main printing tank and the rehydration tank. This ensures that the sinking of the forming platform during printing does not cause the liquid level of the photosensitive resin in the main printing tank to decrease. The printing liquid leveling speed is fast, and the circulating leveling mechanism allows for real-time leveling, ensuring printing accuracy and quality.

[0027] 2. The industrial light-curing sink-type 3D printer's automatic leveling and circulating rehydration system achieves the circulation and rehydration of photosensitive resin through a peristaltic pump. By controlling the working state of the peristaltic pump, it realizes the automatic replenishment and leveling of the photosensitive resin in the main tank of the printing cylinder during the printing process. Compared with the traditional sink-type 3D printer rehydration system, this system can firstly utilize the self-leveling principle to reduce the pressure required during the rehydration process, thereby reducing the complexity and cost of the system; secondly, it can reduce the gap between the forming platform and the liquid surface, reduce the flow of photosensitive resin around the forming platform, and improve printing stability; thirdly, it can maintain a constant liquid level of photosensitive resin in the main tank, avoiding the impact of liquid level changes on printing accuracy and quality.

[0028] 3. The liquid level automatic leveling and circulating refilling system of this industrial light-curing sinking 3D printer realizes the up and down movement of the forming platform by controlling the telescopic movement of the actuator cylinder, improving the movement accuracy and speed of the forming platform, improving printing efficiency, and avoiding the tension generated when each layer separates from the liquid surface after curing, reducing deformation and breakage of printed parts;

[0029] 4. The liquid level automatic leveling and circulating rehydration system of the industrial light-curing sunken 3D printer realizes stable support for the forming platform by setting the base frame in a "sun" shape. At the same time, the present invention realizes effective discharge of photosensitive resin by opening a plurality of groups of drainage holes through the forming platform, thereby increasing the strength and rigidity of the forming platform, improving the quality of the printed parts, and reducing the residue of photosensitive resin on the forming platform, reducing the difficulty of post-processing of the printed parts, and further improving the utilization rate of the photosensitive resin and reducing the printing cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 This is a schematic diagram of the external structure of a light-curing printer with an automatic leveling and circulating refilling system for an industrial light-curing sunken 3D printer according to the present invention;

[0031] Figure 2 This is a schematic diagram of the internal structure of a light-curing printer with an automatic leveling and circulating refilling system for an industrial light-curing sunken 3D printer according to the present invention;

[0032] Figure 3 This is a partial structural diagram of an automatic leveling and circulating refilling system for an industrial light-curing sunken 3D printer according to the present invention;

[0033] Figure 4 A schematic structural diagram of a sinking tank of an industrial light-curing sinking 3D printer liquid level automatic leveling circulation and refilling system according to the present invention;

[0034] Figure 5 This is another structural schematic diagram of a sink tank of an industrial light-curing sink-type 3D printer liquid level automatic leveling circulation and refilling system according to the present invention;

[0035] Figure 6 This is a schematic structural diagram of an industrial light-curing sunken 3D printer liquid level automatic leveling circulation and rehydration system after a peristaltic pump is installed in the sink tank of the present invention;

[0036] Figure 7 This is a structural schematic diagram of a molding platform lifting mechanism of a liquid level automatic leveling and circulating refilling system for an industrial light-curing sunken 3D printer according to the present invention;

[0037] Figure 8 This is a structural schematic diagram of a forming platform of an industrial light-curing sunken 3D printer liquid level automatic leveling and circulating liquid replenishment system according to the present invention;

[0038] Figure 9 This is a structural schematic diagram of the chassis of an industrial light-curing sunken 3D printer liquid level automatic leveling and circulating liquid replenishment system of the present invention.

[0039] In the picture:

[0040] 1. sinking trough; 11. first partition; 12. second partition; 121. connecting hole;

[0041] 13. Third partition; 14. Main trough of printing cylinder; 15. Self-leveling trough;

[0042] 16. Fluid replenishment tank;

[0043] 2. Light-curing printer;

[0044] 3. External mounting bracket; 31. Pump body mounting slot; 32. Peristaltic pump;

[0045] 321, output pipe; 322, input pipe;

[0046] 4. Molding platform lifting mechanism; 41. Executing cylinder; 42. Lifting frame;

[0047] 43. Base frame; 44. Forming platform; 441. Drain hole. DETAILED DESCRIPTION

[0048] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0049] In the description of the invention, it should be noted that the terms "upper," "lower," "inner," "outer," "front end," "rear end," "both ends," "one end," "the other end," and the like, indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0050] In the description of the invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "connected," etc., should be understood broadly. For example, "connected" may refer to a fixed connection, a detachable connection, or an integral connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0051] See also Figure 1-9 The present invention provides a technical solution: an industrial light-curing sinking 3D printer liquid level automatic leveling circulation and refilling system, comprising a light-curing printer 2, a sinking tank 1 installed on the light-curing printer 2, and an external mounting frame 3 arranged on the outside of the sinking tank 1.

[0052] The inner wall of the sinking trough 1 is fixedly connected with a first partition 11, a second partition 12 and a third partition 13. The sinking trough 1 is divided into a printing cylinder main groove 14, a self-leveling groove 15 and a liquid replenishing groove 16 by the first partition 11, the second partition 12 and the third partition 13.

[0053] A communication hole 121 is formed through the lower end of the second partition plate 12 .

[0054] The height of the first partition 11 is smaller than that of the second partition 12, and the height of the second partition 12 matches that of the third partition 13. Specifically, the first partition 11 is provided to effectively separate the main groove 14 of the printing cylinder from the self-leveling groove 15. When the liquid level in the main groove 14 of the printing cylinder is higher than that of the first partition 11, the photosensitive resin liquid in the main groove 14 of the printing cylinder will flow into the self-leveling groove 15 until the liquid level of the photosensitive resin in the main groove 14 of the printing cylinder is lower than that of the first partition 11. This prevents backflow of the photosensitive resin in the self-leveling groove 15, thereby ensuring the fluidity and uniformity of the photosensitive resin in the self-leveling groove 15. Furthermore, the heights of the second partition 12 and the third partition 13 match those of the sinking tank 1. The connecting hole 121 allows for effective communication between the refilling groove 16 and the main groove 14 of the printing cylinder, thereby ensuring full utilization of the photosensitive resin in the refilling groove 16 and reducing printing costs.

[0055] Specifically, when in use, after completing the printing operation of each layer, the scraper is used to absorb and level the photosensitive resin liquid through the reciprocating motion, so that the excess printing liquid can be scraped into the self-leveling groove 15.

[0056] The first partition 11 is arranged between the main groove 14 of the printing cylinder and the self-leveling groove 15, the second partition 12 is arranged between the main groove 14 of the printing cylinder and the liquid replenishing groove 16, and the third partition 13 is arranged between the self-leveling groove 15 and the liquid replenishing groove 16. The third partition 13 is arranged perpendicular to the first partition 11 and the second partition 12. Specifically, by arranging the first partition 11, the second partition 12 and the third partition 13 to be arranged perpendicularly, the rational utilization of the space in the sinking tank 1 is achieved, and the structural compactness and aesthetics of the system are improved. At the same time, by setting the positional relationship of the first partition 11, the second partition 12 and the third partition 13, the effective division between the main groove 14 of the printing cylinder, the self-leveling groove 15 and the liquid replenishing groove 16 is achieved, ensuring the functionality and characteristics of the photosensitive resin in each area.

[0057] A pump body mounting groove 31 is formed through the front end of the external mounting frame 3 , and a peristaltic pump 32 is mounted on the pump body mounting groove 31 by means of bolts.

[0058] The output end of the peristaltic pump 32 is connected to an output tube 321 , and the input end of the peristaltic pump 32 is connected to an input tube 322 . The output tube 321 is connected to the liquid replenishing tank 16 , and the input tube 322 is connected to the self-leveling tank 15 . Specifically, by setting a peristaltic pump 32, an output tube 321, and an input tube 322, a circulating rehydration of the photosensitive resin is achieved. When in use, the industrial light-curing sinking 3D printer liquid level automatic leveling circulating rehydration system achieves circulating rehydration of the photosensitive resin through the peristaltic pump 32. By controlling the working state of the peristaltic pump 32, the photosensitive resin in the main tank 14 of the printing cylinder is automatically replenished and leveled during the printing process. Compared with the traditional sinking 3D printer rehydration system, it has the following advantages: First, it can utilize the self-leveling principle, reduce the pressure required in the rehydration process, and reduce the complexity and cost of the system; second, it can reduce the gap between the molding platform 44 and the liquid surface, reduce the flow of photosensitive resin around the molding platform 44, and improve printing stability; third, it can maintain a constant liquid level of the photosensitive resin in the main tank, avoiding the impact of liquid level changes on printing accuracy and quality.

[0059] Specifically, the input pipe 322 is vertically fixed through the external mounting frame 3 and connected to the inner bottom of the self-leveling trough 15 .

[0060] Specifically, when in use, the photosensitive resin liquid in the main groove 14 of the printing cylinder flows into the self-leveling groove 15, and the photosensitive resin liquid in the self-leveling groove 15 is transported to the liquid replenishing groove 16 through the peristaltic pump 32, the output pipe 321, and the input pipe 322. The liquid replenishing groove 16 is connected to the main groove 14 of the printing cylinder through the connecting hole 121, so that the liquid replenishing groove 16 and the main groove 14 of the printing cylinder are in the same liquid level state, that is, the circulation and leveling of the photosensitive resin liquid in the main groove 14 of the printing cylinder is realized. Compared with the existing technology, there is no need to use a liquid level sensor in conjunction with a control system to achieve liquid level circulation and leveling during the printing process, which effectively reduces the cost of the sinking 3D printer.

[0061] The stereolithography printer 2 is provided with a molding platform lifting mechanism 4, which includes an actuator cylinder 41, a lifting frame 42, a base frame 43 and a molding platform 44, wherein:

[0062] The execution cylinder 41 is installed on the upper end of the light-curing printer 2;

[0063] The lifting frame 42 is fixedly connected to the output end of the actuator cylinder 41;

[0064] The bottom frame 43 is fixedly connected to the bottom of the lifting frame 42;

[0065] The forming platform 44 is fixed to the top of the base frame 43 by bolts;

[0066] The forming platform 44 is movably disposed in the main groove 14 of the printing cylinder.

[0067] The chassis 43 has a structure in the shape of the Chinese character 'Ri'. Specifically, by setting the chassis 43 in the shape of the Chinese character 'Ri', stable support for the forming platform 44 is achieved. On the one hand, it can increase the strength and stiffness of the forming platform 44, improving the quality of the printed parts. On the other hand, it can simplify the structure and installation method of the chassis 43, reducing the manufacturing difficulty and cost of the system. By controlling the telescopic movement of the actuator cylinder 41, the up and down movement of the lifting frame 42, the chassis 43 and the forming platform 44 is realized. Since the chassis 43 is located in the photosensitive resin liquid during the printing process, the chassis 43 with the structure in the shape of the Chinese character 'Ri' facilitates the rapid flow of the liquid from its inner side, reducing the resistance when the chassis 43 moves up and down.

[0068] A number of groups of drainage holes 441 are贯通 opened in the forming platform 44, and the width and length of the forming platform 44 are respectively smaller than the width and length of the main groove 14 of the printing material cylinder. Specifically, by贯通 opening a number of groups of drainage holes 441 in the forming platform, the effective discharge of the photosensitive resin is realized, reducing the residue of the photosensitive resin on the forming platform 44, reducing the post-processing difficulty of the printed parts. Moreover, it can improve the utilization rate of the photosensitive resin, reduce the printing cost, and then improve the movement accuracy and speed of the forming platform 44, improving the printing efficiency. And it can avoid the pulling force generated when separating from the liquid surface after each layer is cured, reducing the deformation and fracture of the printed parts. By adjusting the width and length of the forming platform 44, it can adapt to printed parts of different sizes, improving the applicability and flexibility of the system.

[0069] Embodiment 1

[0070] Parts that are the same as the previous description will not be elaborated here.

[0071] This embodiment provides a structural schematic diagram of a liquid level automatic leveling and circulating liquid replenishing system for an industrial light-curing sinking 3D printer.

[0072] The system includes a light-curing printer 2, a sinking tank 1 installed on the light-curing printer 2, and an external mounting frame 3 arranged outside the sinking tank 1.

[0073] The inner wall of the sinking tank 1 is fixedly connected with a first partition 11, a second partition 12 and a third partition 13. Inside the sinking tank 1, a main groove 14 of the printing material cylinder, a self-leveling tank 15 and a liquid replenishing tank 16 are separated and formed by the first partition 11, the second partition 12 and the third partition 13. A communication hole 121 is贯通 opened at the lower end of the second partition 12.

[0074] A pump body installation groove 31 is贯通 opened at the front end of the external mounting frame 3, and a peristaltic pump 32 is installed at the pump body installation groove 31 through bolts.

[0075] The output end of the peristaltic pump 32 is connected to an output pipe 321, and the input end of the peristaltic pump 32 is connected to an input pipe 322. The output pipe 321 is connected to the inside of the liquid replenishing tank 16, and the input pipe 322 is connected to the inside of the self-leveling tank 15.

[0076] On the light-curing printer 2, there is a forming platform lifting mechanism 4. The forming platform lifting mechanism 4 includes an actuating cylinder 41, a lifting frame 42, a chassis 43, and a forming platform 44, where:

[0077] The actuating cylinder 41 is installed at the upper end of the light-curing printer 2;

[0078] The lifting frame 42 is fixedly connected to the output end of the actuating cylinder 41;

[0079] The chassis 43 is fixedly connected to the bottom of the lifting frame 42;

[0080] The forming platform 44 is fixed to the top of the chassis 43 by bolts;

[0081] The forming platform 44 is movably arranged in the main tank 14 of the printing material cylinder.

[0082] The chassis 43 is in a structure shaped like the Chinese character 'Ri' (day).

[0083] In the forming platform 44, several groups of liquid discharge holes 441 are penetrated and opened, and the width and length of the forming platform 44 are respectively smaller than the width and length of the main tank 14 of the printing material cylinder.

[0084] In this embodiment, the height of the first partition 11 is smaller than the height of the second partition 12, and the height of the second partition 12 is adapted to the height of the third partition 13. The first partition 11 is arranged between the main tank 14 of the printing material cylinder and the self-leveling tank 15, the second partition 12 is arranged between the main tank 14 of the printing material cylinder and the liquid replenishing tank 16, the third partition 13 is arranged between the self-leveling tank 15 and the liquid replenishing tank 16, and the third partition 13 is perpendicularly arranged with both the first partition 11 and the second partition 12.

[0085] In this embodiment, when light-curing 3D printing is required, first, the photosensitive resin is injected into the sinking tank 1, and the forming platform 44 is placed at the initial position in the main tank 14 of the printing material cylinder. Then, the light-curing printer 2 and the peristaltic pump 32 are started, so that the photosensitive resin forms a circulating liquid replenishing system in the sinking tank 1. Then, the actuating cylinder 41 is controlled to drive the forming platform 44 to gradually sink to a predetermined depth, and the light source module is controlled to irradiate and cure the photosensitive resin above the forming platform 44 to form the required printing layer. Then, the actuating cylinder 41 is controlled to drive the forming platform 44 to rise a certain distance so that the forming platform 44 contacts the liquid surface, and the light source module is controlled to irradiate and cure the photosensitive resin above the forming platform 44 to form the required printing layer. Repeat this process until the printing is completed.

[0086] During the printing process, the sinking of the build platform 44 affects the liquid level of the photosensitive resin in the main tank 14 of the printing cylinder. The reciprocating motion of the scraper used to absorb and level the liquid also causes the liquid level of the photosensitive resin to fluctuate. However, due to the connecting hole 121 formed through the lower end of the second partition 12, a connecting channel is formed between the main tank 14 of the printing cylinder and the refill tank 16. Therefore, when the liquid level of the photosensitive resin in the main tank 14 of the printing cylinder falls below that in the refill tank 16, the photosensitive resin in the refill tank 16 automatically flows into the main tank 14 of the printing cylinder through the connecting hole 121, thereby maintaining a constant liquid level of the photosensitive resin in the main tank 14 of the printing cylinder. At the same time, the peristaltic pump 32 operates, extracting the photosensitive resin from the self-leveling tank 15 through the inlet pipe 322 and delivering it to the refill tank 16 through the outlet pipe 321, thereby maintaining an adequate supply of photosensitive resin in the refill tank 16. On the other hand, because the height of the first partition 11 is less than that of the second partition 12, a separation area is formed between the main groove 14 of the printing cylinder and the self-leveling groove 15. Therefore, when the liquid level of the photosensitive resin in the main groove 14 of the printing cylinder is higher than the liquid level of the photosensitive resin in the self-leveling groove 15, the photosensitive resin in the main groove 14 of the printing cylinder will automatically flow into the self-leveling groove 15 through the top of the first partition 11. In this way, the photosensitive resin in the sink 1 is automatically leveled and circulated during the printing process.

[0087] Example 2

[0088] The parts that are the same as those described in the previous article will not be repeated here.

[0089] This embodiment provides a method for using an automatic leveling and circulating refilling system for an industrial light-curing sunken 3D printer. The method includes the following steps:

[0090] S1. Import the desired 3D model into the stereolithography printer 2 and set the printing parameters;

[0091] S2. The photosensitive resin is injected into the sink 1, and the molding platform 44 is placed in the initial position of the printing cylinder main tank 14;

[0092] S3 starts the light-curing printer 2 and the peristaltic pump 32, so that the photosensitive resin forms a circulating rehydration system in the sink 1;

[0093] S4 controls the execution cylinder 41 to drive the molding platform 44 to gradually sink to a predetermined depth, and controls the light source module to irradiate and cure the photosensitive resin above the molding platform 44 to form the desired print layer;

[0094] S5. After completing the printing operation of each layer, the reciprocating motion of the scraper is controlled to absorb and level the photosensitive resin liquid, and the excess printing liquid is scraped into the self-leveling groove 15;

[0095] S6. Repeat steps 4 and 5 until printing is completed;

[0096] S7. Turn off the light-curing printer 2 and the peristaltic pump 32, take out the printed part, and perform post-processing.

[0097] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. An industrial light-curing sunken 3D printer automatic leveling circulation and refilling system, characterized by: It includes a light-curing printer (2), a sinking tank (1) installed on the light-curing printer (2), and an external mounting frame (3) arranged outside the sinking tank (1); The inner wall of the sinking tank (1) is fixedly connected with a first partition board (11), a second partition board (12) and a third partition board (13). Inside the sinking tank (1), a main printing material cylinder tank (14), a self-leveling tank (15) and a liquid replenishing tank (16) are separated and formed by the first partition board (11), the second partition board (12) and the third partition board (13); A communication hole (121) is贯通ly opened at the lower end of the second partition board (12); A pump body mounting groove (31) is贯通ly opened at the front end of the external mounting frame (3), and a peristaltic pump (32) is installed at the pump body mounting groove (31) through bolts; A forming platform lifting mechanism (4) is provided on the light-curing printer (2). The forming platform lifting mechanism (4) includes an actuating cylinder (41), a lifting frame (42), a bottom frame (43) and a forming platform (44), where: The actuating cylinder (41) is installed at the upper end of the light-curing printer (2); The lifting frame (42) is fixedly connected to the output end of the actuating cylinder (41); The bottom frame (43) is fixedly connected to the bottom of the lifting frame (42); The forming platform (44) is fixedly bolted to the top of the bottom frame (43); The forming platform (44) is movably arranged inside the main printing material cylinder tank (14); The height of the first partition board (11) is less than the height of the second partition board (12), and the height of the second partition board (12) is adapted to the height of the third partition board (13); The first partition board (11) is arranged between the main printing material cylinder tank (14) and the self-leveling tank (15), the second partition board (12) is arranged between the main printing material cylinder tank (14) and the liquid replenishing tank (16), the third partition board (13) is arranged between the self-leveling tank (15) and the liquid replenishing tank (16), and the third partition board (13) is perpendicularly arranged to both the first partition board (11) and the second partition board (12); The output end of the peristaltic pump (32) is connected with an output pipe (321), and the input end of the peristaltic pump (32) is connected with an input pipe (322). The output pipe (321) is connected into the liquid replenishing tank (16), and the input pipe (322) is connected into the self-leveling tank (15).

2. The automatic leveling and circulating refilling system for industrial light-curing sunken 3D printers according to claim 1 is characterized by: The bottom frame (43) has a "day”-shaped structure.

3. The automatic leveling and circulating refilling system for industrial light-curing sunken 3D printers according to claim 1 is characterized by: A number of groups of liquid discharge holes (441) are贯通ly opened inside the forming platform (44), and the width and length of the forming platform (44) are respectively less than the width and length of the main printing material cylinder tank (14).

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