Small sinking type photocuring forming equipment and method

Abstract

The invention relates to small sinking type photocuring forming equipment and method. The forming equipment comprises a rack, a scraper module, a liquid level control module, an optical engine module, a printing platform lifting module and a replaceable cylinder body. The replaceable cylinder body is located below the rack platform, the scraper module is longitudinally installed on the rack platform, the optical engine module is transversely installed on the rack platform, and the printing platform lifting module and the liquid level control module are laterally installed on the rack platform; miniaturization of photocuring forming equipment is achieved through reasonable design and arrangement of all the modules, the large size, caused by the working distance of an optical engine, of a large-breadth sunken printer is avoided through movement of the low-cost small-breadth optical engine, and rapid disassembly and assembly of a forming cylinder body can be achieved; the cleaning difficulty of the small sinking type photocuring printer is reduced, and the small sinking type photocuring printer belongs to the technical field of additive manufacturing.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to a small-scale sinking photocuring forming device and method. Background Art

[0002] Stereolithography equipment is widely used in additive manufacturing technology, especially in rapid prototyping and small batch production. However, existing light-stereolithography equipment generally has problems such as large size, low modularity, and cumbersome material replacement, which limits its application in miniaturization, integration, and efficiency.

[0003] The existing equipment usually requires a long downtime during the replacement of the forming cylinder, and the replacement operation is complicated, which is not suitable for quickly switching different materials for production. The forming cylinder needs to be manually disassembled and replaced, which not only wastes a lot of time, but also increases the workload of operators and affects the continuity and efficiency of production. In addition, the existing equipment often lacks sufficient modularity and integration in design, resulting in its large size and large space occupation, which is not conducive to its application in a miniaturized production environment. At the same time, since the modules such as liquid level control and printing platform lifting in the equipment are scattered and not compact enough, the overall space utilization is not high, and the operation and maintenance are also relatively complicated. Summary of the invention

[0004] In view of the problems existing in the prior art, the purpose of the present invention is to provide a small-sized sunken photocuring forming device and method, which can realize the miniaturization and high efficiency of the equipment, improve the efficiency of forming cylinder replacement, and meet the requirements of modern additive manufacturing technology for equipment efficiency and simple operation.

[0005] In order to achieve the above object, the present invention adopts the following technical solution:

[0006] A small-sized sinking photocuring forming device comprises a frame, a scraper module, a liquid level control module, an optical engine module, a printing platform lifting module and a replaceable cylinder;

[0007] The replaceable cylinder body is arranged below the frame, and includes a forming cylinder, a stud, a foot cup and a universal wheel. A fixing plate is fixedly connected to the side of the forming cylinder, the universal wheel is arranged on one side of the stud and fixedly connected to the bottom of the fixing plate, the stud is passed through the fixing plate from bottom to top, the foot cup is arranged between the head of the stud and the fixing plate, and the foot cup is threadedly connected to the stud, and is used to lift the forming cylinder to the printing plane or lower the forming cylinder to make the universal wheel abut against the bottom of the frame by rotating the foot cup;

[0008] The printing platform lifting module is fixedly connected to the frame and is provided with a printing platform, and is used to adjust the distance between the printing platform and the liquid surface of the forming cylinder;

[0009] The scraper module is longitudinally mounted on the frame and is used to smooth the liquid surface and remove bubbles through longitudinal movement;

[0010] The optical engine module is installed horizontally on the frame and is used to perform light curing on the liquid surface that is laid flat and has bubbles removed through horizontal movement;

[0011] The liquid level control module is installed on the frame and is used to adjust the current liquid level to ensure that the liquid level is always maintained at an appropriate height during the printing process.

[0012] Furthermore, the scraper module includes a scraper and a longitudinal moving mechanism, the scraper is installed on the longitudinal moving mechanism, and the longitudinal moving mechanism is installed on the frame to drive the scraper to move along the X-axis direction on the frame to achieve uniform laying and leveling of the liquid surface material.

[0013] Furthermore, the scraper module also includes a guide rail, which is installed on the frame along the X-axis direction and is used to guide the movement of the scraper.

[0014] Furthermore, the scraper module also includes a negative pressure mechanism, which includes an air pipe, an air pipe adapter and a vacuum pump. The air pipe adapter is installed corresponding to the scraper, and the air pipe adapter is connected to the vacuum pump through an air pipe. The vacuum pump absorbs the liquid surface bubbles generated when the scraper is working through the air pipe.

[0015] Furthermore, the vacuum pump is connected to a waterproof box to prevent moisture or liquid from entering the gas path system.

[0016] Furthermore, the optical engine module includes an optical screw slide assembly and a line forming optical machine. The optical screw slide assembly is installed on the frame and moves laterally along the Y-axis direction. The line forming optical machine is connected to the optical screw slide assembly and is used to achieve photocuring of each layer of liquid on the printing platform through lateral movement.

[0017] Furthermore, the liquid level control module includes a liquid level sensor and a liquid pressure block. The liquid level sensor is connected to the control system for real-time monitoring of the liquid level height on the printing platform and feeding back the information to the control system; the control system is connected to the liquid pressure block for controlling the up and down movement of the liquid pressure block to adjust the liquid level height according to the liquid level height information on the printing platform.

[0018] Furthermore, a pull ring is provided on the side of the forming cylinder.

[0019] A small-scale sinking photocuring forming method comprises the following steps:

[0020] Rotate the foot cup to lift the forming cylinder to the printing plane;

[0021] The printing platform lifting module adjusts the distance between the printing platform and the liquid surface of the forming cylinder;

[0022] The scraper module smoothes the liquid surface and removes bubbles through longitudinal movement;

[0023] The optical engine module performs light curing on the liquid surface that has been laid flat and free of bubbles through lateral movement;

[0024] The liquid level control module adjusts the current liquid level to ensure that the liquid level is always maintained at an appropriate height during the printing process.

[0025] Furthermore, when a new forming cylinder needs to be replaced, the old forming cylinder is lowered by rotating the foot cup so that the universal wheel at the bottom of the old forming cylinder contacts the bottom of the frame, and then the old forming cylinder is pulled out through the pull ring, and then the new forming cylinder is pushed under the printing plane through the universal wheel, and the new forming cylinder is lifted to the printing plane by rotating the foot cup.

[0026] In general, the present invention has the following advantages:

[0027] 1. Improve the production efficiency of the equipment and reduce the downtime of the equipment: The present invention realizes the convenient replacement of the forming cylinder by introducing the forming cylinder quick replacement module, and can quickly replace the forming cylinder without stopping the equipment, which significantly reduces the downtime of the equipment and improves the production efficiency. At the same time, through the quick replacement design, it can quickly respond to the material replacement needs in the production process and adapt to different production scenarios.

[0028] 2. Realize the miniaturization design of equipment and improve the space utilization rate: Through the efficient integration and miniaturization design of each module of the equipment, the present invention significantly reduces the volume of the equipment, occupies less space, can better adapt to the miniaturized production environment, and improve the space utilization rate of the equipment. This design enables the equipment to operate efficiently in a smaller working space, meeting the demand of modern manufacturing industry for compact equipment.

[0029] 3. Improve the accuracy and stability of the photocuring process: The present invention uses an optimized optical engine module and liquid level control module to accurately control the liquid level height and each layer of photocuring during the printing process, ensuring that the liquid level of each layer is uniform and stable, effectively avoiding printing defects caused by inaccurate liquid level control in traditional equipment, and improving the accuracy of the photocuring process and printing quality.

[0030] 4. Simplify operation and reduce maintenance complexity: The design of the present invention not only improves the automation level of the equipment, but also reduces the operation complexity of the equipment through modular design. The quick replacement of the forming cylinder and the miniaturization design of the equipment make the maintenance and operation of the equipment easier, reduce the labor intensity of the operator, and improve the service life and stability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a structural schematic diagram of the device of the present invention;

[0032] Figure 2 is a schematic diagram of the structure of the scraper module;

[0033] Figure 3 It is a structural schematic diagram of the liquid level control module;

[0034] Figure 4 is a schematic diagram of the structure of the optical engine module;

[0035] Figure 5 It is a structural diagram of the printing platform lifting module;

[0036] Figure 6 It is a schematic diagram of the structure of the replaceable cylinder body;

[0037] In the figure:

[0038] 1- rack;

[0039] 2-scraper module; 201-scraper; 202-scraper mounting plate; 203-longitudinal moving mechanism; 20301-scraper synchronous belt; 20302-synchronous belt pressure plate; 20303-scraper synchronous belt pulley; 20304-scraper stepper motor; 20305-scraper stepper motor bracket; 20306-scraper optical axis; 20307-optical axis bracket; 20308-bearing; 20309-slider; 20310-guide rail; 204-negative pressure mechanism; 20401-trachea; 20402-trachea adapter; 20403-air circuit mounting plate; 20404-vacuum pump; 20405-waterproof box;

[0040] 3-liquid level control module; 301-liquid level stepping motor; 302-liquid level mounting plate; 303-liquid level sensor; 304-liquid level sensor bracket; 305-nut seat; 306-bearing seat; 307-liquid level optical axis; 308-screw rod; 309-coupling; 310-liquid pressure block; 311-liquid pressure block upper cover;

[0041] 4-optical engine module; 401-optical stepper motor; 402-optical stepper motor bracket; 403-optical synchronous belt; 404-optical synchronous pulley; 405-optical screw slide assembly; 406-first adapter plate; 407-second adapter plate; 408-line forming optical machine;

[0042] 5-printing platform lifting module; 501-platform stepper motor; 502-platform stepper motor bracket; 503-printing platform; 504-platform support rod; 505-Z-axis mounting plate; 506-platform adapter plate; 507-platform screw slide assembly;

[0043] 6-replaceable cylinder body; 601-forming cylinder; 602-foot cup; 603-pull ring; 604-universal wheel. DETAILED DESCRIPTION

[0044] The present invention will be described in further detail below.

[0045] like Figure 1 As shown, a small-sized sinking type photocuring forming device includes a frame 1, a scraper module 2, a liquid level control module 3, an optical engine module 4, a printing platform lifting module 5 and a replaceable cylinder 6.

[0046] Rack 1 serves as the basic supporting structure of the equipment and provides a stable platform, enabling each module to work together effectively to ensure the stability and reliability of the equipment.

[0047] The scraper module 2 is longitudinally mounted on the platform of the frame 1 and is used to level the liquid surface of each layer after solidification to ensure that the material surface is smooth and free of bubbles.

[0048] The liquid level control module 3 is installed sideways on one side of the platform of the rack 1 to control the liquid level to ensure that the liquid level of each layer of material is always maintained at a predetermined height.

[0049] The optical engine module 4 is horizontally mounted on the platform of the frame 1 and is responsible for the layer-by-layer shaping of the photocuring layer during the printing process.

[0050] The printing platform lifting module 5 is installed at the side of the platform of the frame 1, and is used to control the up and down movement of the printing platform 503 on the Z axis to ensure the precise distance between the printing platform 503 and the liquid surface to maintain good printing quality.

[0051] The replaceable cylinder body 6 is located below the printing platform 503 of the frame 1, which can realize the rapid replacement of the forming cylinder 601, greatly reducing the downtime of the equipment and improving the production efficiency of the equipment.

[0052] like Figure 2As shown, the scraper module 2 includes a scraper 201, a scraper mounting plate 202, a longitudinal moving mechanism 203 and a negative pressure mechanism 204. The longitudinal moving mechanism 203 is mounted on the frame 1, and the scraper 201 is mounted on the longitudinal moving mechanism 203 through the scraper mounting plate 202. The longitudinal moving mechanism 203 enables the scraper 201 to move precisely along the X-axis direction on the platform of the frame 1, thereby achieving uniform laying and leveling of the liquid surface material. The main function of the scraper module 2 is to lay each layer of the liquid surface level to avoid bubbles or uneven distribution affecting the printing effect. The negative pressure mechanism 204 cooperates with the scraper module 2 and is connected to the vacuum pump 20404 through the air pipe 20401 and the air pipe adapter 20402, which can remove bubbles generated on the liquid surface during the operation of the scraper 201, ensure that the liquid surface is smooth and uniform, and thus improve the printing quality of each layer. The longitudinal moving mechanism 203 includes a scraper synchronous belt 20301, a synchronous belt pressure plate 20302, a scraper synchronous belt pulley 20303, a scraper stepper motor 20304, a scraper stepper motor bracket 20305, a scraper optical axis 20306, an optical axis bracket 20307, ​​a bearing 20308, a slider 20309 and a guide rail 20310. The module drives the scraper synchronous belt 20301 through the scraper stepper motor 20304 installed on the scraper stepper motor bracket 20305, drives the scraper synchronous belt pulley 20303 to rotate, and keeps the synchronous belt tensioned through the synchronous belt pressure plate 20302, ensuring that the scraper 201 moves smoothly and accurately along the guide rail 20310 in the longitudinal direction. The scraper timing belt 20301 rotates on the scraper optical axis 20306. The scraper optical axis 20306 and the optical axis bracket 20307 cooperate to ensure the stability of the scraper optical axis 20306 during the movement. The bearing 20308 is sleeved on the scraper optical axis 20306 to support the scraper optical axis 20306 and reduce friction, ensuring that the scraper 201 can move smoothly. The slider 20309 cooperates with the guide rail 20310 to enable the scraper 201 to maintain precise longitudinal movement during the entire working process, ensuring the uniformity of each layer of liquid surface. The negative pressure mechanism 204 includes an air pipe 20401, an air pipe adapter 20402, an air circuit mounting plate 20403, a vacuum pump 20404 and a waterproof box 20405. The negative pressure mechanism 204 connects the vacuum pump 20404 to the scraper module 2 through the air pipe 20401, which can effectively remove bubbles generated during the working process of the scraper 201. The air pipe adapter 20402 is connected to the scraper 201 to ensure that the air extraction process is accurate. The vacuum pump 20404 sucks and discharges the bubbles generated by the scraper 201 when it is working through the air pipe 20401 to ensure that the liquid surface of each layer can be laid smoothly without bubbles, avoiding affecting the accuracy and quality of printing. At the same time, the air circuit installation plate 20403 is connected to the waterproof box 20405 to prevent moisture or liquid from entering the air circuit system, ensuring long-term stable operation of the equipment.

[0053] like Figure 3As shown, the liquid level control module 3 includes a liquid level stepper motor 301, a liquid level mounting plate 302, a liquid level sensor 303, a liquid level sensor bracket 304, a nut seat 305, a bearing seat 306, a liquid level optical axis 307, a screw 308, a coupling 309, a liquid pressure block 310 and a liquid pressure block upper cover 311. The main function of the liquid level control module 3 is to accurately adjust the liquid level by controlling the movement of the liquid pressure block 310 to ensure that the liquid level is always maintained at an appropriate height during the printing process. The liquid level stepper motor 301 is installed on the liquid level mounting plate 302, and the liquid level sensor 303 is fixed on the liquid level sensor bracket 304 to monitor the liquid level in real time and feed back the information to the control system. According to the feedback from the sensor, the liquid level stepper motor 301 drives the screw 308 through the coupling 309, thereby driving the liquid pressure block 310 to move up and down along the liquid level optical axis 307, thereby adjusting the liquid level. The upper cover 311 of the liquid pressure block is provided with a nut seat 305 and a bearing seat 306, the screw rod 308 is threadedly connected to the nut seat 305, the liquid surface optical axis 307 is passed through the bearing seat 306, and the nut seat 305 and the bearing seat 306 provide stable support to ensure the precise movement of the liquid pressure block 310 and avoid the negative impact of liquid level fluctuations on the printing quality.

[0054] like Figure 4 As shown, the optical engine module 4 includes an optical stepper motor 401, an optical stepper motor bracket 402, an optical synchronous belt 403, an optical synchronous pulley 404, an optical lead screw slide assembly 405, a first adapter plate 406, a second adapter plate 407 and a line forming optical machine 408. The main function of this module is to photo-cure the liquid surface on the printing platform 503 through the line forming optical machine 408 to cure the material layer by layer. The optical stepper motor 401 is fixed to the frame 1 through the optical stepper motor bracket 402, driving the optical synchronous belt 403 and the optical synchronous pulley 404, thereby driving the optical lead screw slide assembly 405 to perform precise lateral movement along the Y-axis direction. The optical lead screw slide assembly 405 is installed on the slide through the first adapter plate 406 and the second adapter plate 407 to ensure that the optical machine can move accurately and stably in the lateral direction on the frame 1. The line forming optical machine 408 is installed on the slide through the adapter plate and connected to the optical screw slide assembly 405. It can perform precise lateral movement according to the preset trajectory to achieve light curing of each layer of liquid surface. The lateral movement of the optical machine cooperates with the layer-by-layer curing of the liquid surface on the printing platform 503 to ensure printing accuracy and stability.

[0055] like Figure 5As shown, the printing platform lifting module 5 includes a platform stepper motor 501, a platform stepper motor bracket 502, a printing platform 503, a platform support rod 504, a Z-axis mounting plate 505, a platform adapter plate 506 and a platform screw slide assembly 507. The main function of this module is to accurately adjust the distance between the printing platform 503 and the liquid surface by controlling the up and down movement of the printing platform 503 along the Z axis, thereby ensuring that each layer of material can be accurately solidified. The platform stepper motor 501 is fixed to the frame 1 through the platform stepper motor bracket 502, and cooperates with the platform screw slide assembly 507 through a coupling to drive the platform screw slide assembly 507 to move up and down along the Z axis. The Z-axis mounting plate 505 is fixed to the frame 1, and the platform adapter plate 506 is installed on the Z-axis mounting plate 505 through the platform screw slide assembly 507 to ensure the stable movement of the printing platform 503. The platform support rods 504 are installed on both sides of the platform adapter plate 506 to support the printing platform 503 to ensure that the platform does not tilt or become unstable during the lifting process. The printing platform 503 is supported by the platform support rods 504 and driven by the platform stepper motor 501 to achieve precise up and down movement to control the relative position between the printing platform 503 and the liquid surface.

[0056] like Figure 6 As shown, the replaceable cylinder body 6 includes a forming cylinder 601, a stud, a foot cup 602, a pull ring 603 and a universal wheel 604. A fixed plate is fixedly connected to the side of the forming cylinder 601, and the universal wheel 604 is arranged on one side of the stud and fixed to the bottom of the fixed plate. The stud is inserted into the fixed plate from bottom to top, and the foot cup 602 is arranged between the head of the stud and the fixed plate. The foot cup 602 is threadedly connected to the stud. The main purpose of this module design is to achieve rapid replacement of the forming cylinder 601, reduce the downtime of the equipment, and improve production efficiency. The forming cylinder 601 is the core component of this equipment and is used to store the materials required for printing. During the working process, the forming cylinder 601 carries liquid or powder materials and is formed through the light curing process on the printing platform 503. The foot cup 602 is installed at the bottom of the forming cylinder 601. By rotating the foot cup 602 on the stud, the height position of the forming cylinder 601 can be adjusted, so that it can be more convenient to operate when replacing. The pull ring 603 is installed on both sides of the forming cylinder 601 for pulling during operation, so as to quickly remove the used forming cylinder 601 and replace it with a new one. When in use, the operator rotates the foot cup 602 so that the universal wheel 604 contacts the bottom of the frame 1. At this time, the forming cylinder 601 can be pulled out through the pull ring 603 for replacement. The universal wheel 604 is installed at the bottom of the forming cylinder 601. Through the rotation of the universal wheel 604 and the cooperation of the foot cup 602, the forming cylinder 601 can be moved smoothly, simplifying the replacement process of the forming cylinder 601. The operator only needs to simply rotate the foot cup 602 to easily complete the lifting or lowering of the forming cylinder 601, and then drag the forming cylinder 601 out for replacement through the pull ring 603.

[0057] A small-scale sinking photocuring forming method comprises the following steps:

[0058] S1, twist the foot cup 602 of the forming cylinder 601 containing the previous material, so that the universal wheel 604 at the bottom of the forming cylinder 601 contacts the bottom of the knife frame 1, and then drag it out through the pull ring 603;

[0059] S2, push the forming cylinder 601 containing the next material to the bottom of the printing plane, twist the foot cup 602 of the forming cylinder 601, and lift the forming cylinder 601 to the printing plane;

[0060] S3, when the material can self-level, the printing platform 503 descends to a height more than ten times the thickness of the printing layer, remains stationary for more than 2 seconds, then rises to the height required for printing, remains stationary for more than 2 seconds until the material is leveled, and enters S5; when the material cannot self-level, the printing platform 503 descends to a height of the thickness of the printing layer, and the scraper 201 moves longitudinally to smooth the liquid surface and remove bubbles;

[0061] S4, the optical engine module 4 works, and the line forming optical machine 408 moves horizontally to perform light curing on the liquid surface on the printing platform 503;

[0062] S5, after the layer is cured, the printing platform lifting module 5 drives the printing platform 503 to descend a certain distance, and S3-S5 are repeated;

[0063] S6, after the liquid level height changes, the liquid level control module 3 senses the current liquid level through the liquid level sensor 303 during the printing process, and controls the movement of the liquid pressing block 310 to adjust the liquid level height, and then cycles S1-S5.

[0064] The present invention improves the space utilization of the equipment by integrating multiple modules, and solves the problem of long time and complicated operation in the process of replacing the forming cylinder 601 of the traditional equipment. Through the innovative design of the replaceable cylinder body 6, combined with the coordinated work of the optical engine module 4, the printing platform lifting module 5 and the liquid level control module 3, the present invention can realize the rapid replacement of the forming cylinder 601 and ensure the efficient use of materials and a stable printing process.

[0065] The present invention not only effectively improves the working efficiency of the equipment, but also reduces the size of the equipment by optimizing the module configuration, adapting to the needs of smaller size and flexibility. Overall, the present invention has a highly integrated miniaturized design, which can meet the requirements of modern additive manufacturing technology for equipment efficiency and simple operation.

[0066] The above embodiments are preferred implementation modes of the present invention, but the implementation modes of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be equivalent replacement methods and are included in the protection scope of the present invention.

Claims

1. A small-sized sinking photo-curing forming device, characterized in that: It includes a frame, a scraper module, a liquid level control module, an optical engine module, a printing platform lifting module and a replaceable cylinder; The replaceable cylinder body is arranged below the frame, and includes a forming cylinder, a stud, a foot cup and a universal wheel. A fixing plate is fixedly connected to the side of the forming cylinder, the universal wheel is arranged on one side of the stud and fixedly connected to the bottom of the fixing plate, the stud is passed through the fixing plate from bottom to top, the foot cup is arranged between the head of the stud and the fixing plate, and the foot cup is threadedly connected to the stud, and is used to lift the forming cylinder to the printing plane or lower the forming cylinder to make the universal wheel abut against the bottom of the frame by rotating the foot cup; The printing platform lifting module is fixedly connected to the frame and is provided with a printing platform, and is used to adjust the distance between the printing platform and the liquid surface of the forming cylinder; The scraper module is longitudinally mounted on the frame and is used to smooth the liquid surface and remove bubbles through longitudinal movement; The optical engine module is installed horizontally on the frame and is used to perform light curing on the liquid surface that is laid flat and has bubbles removed through horizontal movement; The liquid level control module is installed on the frame and is used to adjust the current liquid level to ensure that the liquid level is always maintained at an appropriate height during the printing process.

2. A small-sized sinking type light-curing forming device according to claim 1, characterized in that: The scraper module includes a scraper and a longitudinal moving mechanism. The scraper is installed on the longitudinal moving mechanism. The longitudinal moving mechanism is installed on the frame to drive the scraper to move along the X-axis direction on the frame to achieve uniform laying and leveling of the liquid surface material.

3. A small-sized sinking type light-curing forming device according to claim 2, characterized in that: The scraper module also includes a guide rail, which is installed on the frame along the X-axis direction and is used to guide the movement of the scraper.

4. The small-sized sinking type light-curing forming device according to claim 2, characterized in that: The scraper module also includes a negative pressure mechanism, which includes an air pipe, an air pipe adapter and a vacuum pump. The air pipe adapter is installed corresponding to the scraper, and the air pipe adapter is connected to the vacuum pump through the air pipe. The vacuum pump absorbs the liquid surface bubbles generated when the scraper is working through the air pipe.

5. The small-sized sinking type light-curing forming device according to claim 4, characterized in that: The vacuum pump is connected with a waterproof box to prevent moisture or liquid from entering the gas path system.

6. The small-sized sinking type light-curing forming device according to claim 1, characterized in that: The optical engine module includes an optical screw slide assembly and a line forming optical machine. The optical screw slide assembly is installed on the frame and moves laterally along the Y-axis direction. The line forming optical machine is connected to the optical screw slide assembly and is used to achieve light curing of each layer of liquid on the printing platform through lateral movement.

7. The small-sized sinking type photo-curing forming device according to claim 1, characterized in that: The liquid level control module includes a liquid level sensor and a liquid pressure block. The liquid level sensor is connected to the control system to monitor the liquid level on the printing platform in real time and feed the information back to the control system; the control system is connected to the liquid pressure block to control the up and down movement of the liquid pressure block to adjust the liquid level according to the liquid level information on the printing platform.

8. The small-sized sinking photo-curing forming device according to claim 1, characterized in that: A pull ring is provided on the side of the forming cylinder.

9. A small-scale sinking photocuring forming method, characterized in that: The small-sized sinking type photocuring forming device according to any one of claims 1 to 8 comprises the following steps: Rotate the foot cup to lift the forming cylinder to the printing plane; The printing platform lifting module adjusts the distance between the printing platform and the liquid surface of the forming cylinder; The scraper module smoothes the liquid surface and removes bubbles through longitudinal movement; The optical engine module performs light curing on the liquid surface that has been laid flat and free of bubbles through lateral movement; The liquid level control module adjusts the current liquid level to ensure that the liquid level is always maintained at an appropriate height during the printing process.

10. A small-scale sinking photo-stereolithography method according to claim 9, characterized in that: When it is necessary to replace a new forming cylinder, turn the foot cup to lower the old forming cylinder, let the universal wheel at the bottom of the old forming cylinder touch the bottom of the frame, then pull out the old forming cylinder through the pull ring, and then push the new forming cylinder under the printing plane through the universal wheel, and lift the new forming cylinder to the printing plane by turning the foot cup.

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