Photocuring forming equipment and method

Abstract

The invention relates to photocuring forming equipment and method. The photocuring forming equipment is characterized in that a working platform is arranged on a rack, and a first station, a second station, a third station and a fourth station are arranged on the working platform; the forming and feeding module comprises a first forming cylinder, a second forming cylinder and a feeding module, the first forming cylinder and the second forming cylinder are connected with the second station and the fourth station respectively, and the feeding module is communicated with the first station; the photocuring module is arranged above the working platform; the double-scraper slurry laying structure comprises a driving motor, a scraper shaft and two scraper assemblies, the driving motor is fixedly connected with the rack and drives the scraper shaft to rotate, and the two scraper assemblies are connected with the scraper shaft and symmetrically distributed along the center of the scraper shaft; scrapers of the two scraper assemblies can sequentially rotate to pass through the first station, the second station, the third station and the fourth station. According to the equipment, efficient laying and slurry saving can be achieved in the light curing process, and the equipment 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 photocuring forming device and method. Background Art

[0002] Additive manufacturing technology is an advanced manufacturing technology that has developed rapidly in recent years and is widely used in jewelry manufacturing, aerospace, automobile manufacturing and other fields. Compared with traditional manufacturing methods, 3D printing has the advantages of fast speed, low cost and environmental protection. However, existing photocuring additive manufacturing equipment usually relies on a single scraper assembly and a simple feeding system. Due to the uneven slurry coating and the waste of excess slurry, it not only affects the quality and performance of the final print, but also leads to an increase in production costs. On the other hand, the coating speed of existing equipment is slow, which seriously affects the overall production efficiency. Therefore, how to improve the utilization rate of the slurry, improve the coating efficiency, and at the same time ensure the uniformity of the slurry coating has become a key issue for the development of photocuring additive manufacturing technology towards large-scale and high-efficiency production. Summary of the invention

[0003] In view of the technical problems existing in the prior art, the purpose of the present invention is to provide a photocuring forming device and method to solve the problems of slurry waste, low paving efficiency, poor uniformity, etc. in the prior art. The slurry is spread by two sets of scraper assemblies. During one rotation of the scraper shaft, the two layers of slurry in the two forming cylinders are photocured and the excess slurry is recycled, which can achieve efficient paving and save slurry during the photocuring process.

[0004] In order to achieve the above object, the present invention adopts the following technical solution:

[0005] A photo-curing forming device, comprising:

[0006] A frame, wherein the frame has a working platform, and the working platform is provided with a first working station, a second working station, a third working station and a fourth working station;

[0007] A molding and feeding module, the molding and feeding module comprises a first molding cylinder, a second molding cylinder and a feeding module, the first molding cylinder and the second molding cylinder are connected to the second station and the fourth station respectively, and the feeding module is connected to the first station;

[0008] A light curing module, which is arranged above the working platform;

[0009] The double-scraper slurry paving structure includes a drive motor, a scraper shaft and two groups of scraper assemblies. The drive motor is fixedly connected to the frame, and the drive motor drives the scraper shaft to rotate. The two groups of scraper assemblies are connected to the scraper shaft. The two groups of scraper assemblies are symmetrically distributed along the center of the scraper shaft. The scrapers of the two groups of scraper assemblies can rotate through the first station, the second station, the third station and the fourth station in sequence.

[0010] As a preferred embodiment, the double-scraper slurry paving structure also includes a support frame and a transmission assembly, the drive motor is fixedly connected to the frame through the support frame, the support frame is connected to the frame, the transmission assembly is connected to the output shaft of the drive motor, the scraper shaft is connected to the transmission assembly, and the scraper shaft is rotatably connected to the support frame.

[0011] As a preference, the transmission assembly includes a synchronous belt and a synchronous pulley. There are two synchronous pulleys. The two synchronous pulleys are fixedly connected to the scraper shaft and the output shaft of the drive motor respectively, and the synchronous belt is connected to the two synchronous pulleys.

[0012] As a preferred embodiment, each scraper assembly includes a hand-tightening nut, a scraper frame, an upper scraper frame, a spring, a middle scraper frame, a lower scraper frame, a scraper clamp and a blade. The scraper frame is fixedly connected to the scraper shaft, the upper scraper frame is fixedly connected to the scraper frame, the upper scraper frame and the middle scraper frame are matched with a hand-tightening nut and a connecting bolt, the spring is sleeved on the outside of the connecting bolt, the spring is located between the upper scraper frame and the middle scraper frame, and the connecting bolt can slide relative to the upper scraper frame; the middle scraper frame and the lower scraper frame are adjustably connected, and the blade is clamped and fixed to the lower scraper frame by the scraper clamp.

[0013] As a preferred embodiment, both the scraper middle blade holder and the scraper lower blade holder are provided with ear buckles, each ear buckle is provided with a connecting hole, and the two ear buckles are connected to nuts by bolts passing through the two connecting holes.

[0014] As a preference, the first workstation is provided with a first through hole, and the feeding module is connected to the first through hole.

[0015] Preferably, the feeding module comprises a feeding interface, a peristaltic pump and a feeding container, the peristaltic pump and the feeding container are connected via a feeding pipe, the peristaltic pump and the feeding interface are connected via a connecting hose, and the feeding interface is connected to the first through hole.

[0016] As a preferred embodiment, the first forming cylinder and the second forming cylinder have the same structure, and both the first forming cylinder and the second forming cylinder include a printing platform, a forming cylinder body, a piston, an electric push rod and an electric push rod adapter plate, the electric push rod adapter plate is fixedly connected to the bottom of the forming cylinder, the movable end of the electric push rod passes through the electric push rod adapter plate and is fixedly connected to the piston, the piston is slidingly connected to the forming cylinder, and the printing platform is connected to the top surface of the piston; the second station and the fourth station are respectively provided with a second through hole and a fourth through hole, the printing platforms of the first forming cylinder and the second forming cylinder structure are respectively embedded in the second through hole and the fourth through hole, and the printing platforms of the first forming cylinder and the second forming cylinder structure can slide relative to the second through hole and the fourth through hole, respectively.

[0017] As a preferred embodiment, the photocuring module includes two light machines, which correspond to the second station and the fourth station respectively; each light machine is fixedly connected to the frame through a light machine fixing plate, and a light machine protective shell is provided on the circumference of each light machine, which is mounted on the light machine fixing plate, and the light machine fixing plate is fixed to the frame by bolts.

[0018] A photocuring forming method, the method adopts a photocuring forming device, and the method comprises the following steps:

[0019] S1, the electric push rods of the first forming cylinder and the second forming cylinder move the printing platform to the same height as the printing plane through the piston;

[0020] S2, the driving motor drives one set of scraper assemblies to reset to the first station, and another set of scraper assemblies symmetrical to the center thereof is at the third station;

[0021] S3, the peristaltic pump supplies the slurry to the feed port through the connecting hose;

[0022] S4, the driving motor drives one set of scraper assemblies to rotate and arrive at the third station via the second station, and the slurry is spread on the printing platform; the other set of scraper assemblies arrives at the first station via the fourth station and waits;

[0023] S5, the optical machine performs light curing on the slurry on the printing platform;

[0024] S6, the electric push rods in the first forming cylinder and the second forming cylinder drive the printing platform to descend one level through the piston, and the peristaltic pump supplies the slurry to the feeding port again through the connecting pipeline;

[0025] S7, one set of scraper assemblies arrives at the first station via the fourth station, and spreads the slurry on the printing platform of the second forming cylinder; another set of scraper assemblies arrives at the third station via the second station, and spreads the slurry on the printing platform of the first forming cylinder;

[0026] S8, two photo machines perform photocuring on the slurry on the two printing platforms respectively;

[0027] S9, repeat S3 to S8 until the printing of the models on the two printing planes is completed.

[0028] In general, the present invention has the following advantages:

[0029] 1. The photocuring forming device and method of the present invention effectively saves slurry and reduces waste: through the close cooperation between the various structures, the quantitative delivery and spreading of the slurry are accurately controlled. During the printing process, the feed port can intelligently adjust the excess slurry to ensure the recycling of the slurry and avoid unnecessary waste. This design greatly improves the utilization rate of materials, reduces production costs, and further optimizes production efficiency.

[0030] 2. The photocuring forming equipment and method of the present invention improve the automation level and economic efficiency: the close cooperation between the double scraper slurry coating structure and the forming feeding module makes the slurry coating process highly automated, reducing manual intervention and operation complexity. The operator only needs to monitor and adjust the equipment through the host computer to achieve automatic control, further improving the convenience and stability of production. By effectively saving slurry and improving production efficiency, the production process has higher economic efficiency.

[0031] 3. The photocuring forming device and method of the present invention significantly improves the slurry paving efficiency and increases the production speed: the drive motor cooperates with the transmission component to drive the scraper shaft to drive the two sets of scraper components to rotate. As long as the two forming cylinders are matched, the two layers of slurry in the two forming cylinders can be photocured during one rotation of the scraper shaft and the excess slurry can be recycled, thereby achieving high-speed paving and recycling of the slurry. This design greatly improves the paving speed, significantly improves the production efficiency, and meets the needs of large-scale and rapid manufacturing. Compared with traditional equipment, it can complete more printing layers in the same time, greatly shortening the production cycle.

[0032] 4. A photocuring forming device and method of the present invention optimizes the design of the scraper assembly to ensure uniform paving: In order to ensure uniform slurry paving and reduce quality problems caused by uneven paving, two sets of scraper assemblies with central symmetry are used to ensure uniform distribution of slurry during high-speed paving, avoiding the uneven slurry distribution phenomenon in the traditional single scraper design, thereby improving the overall quality and precision of the printed part. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 is a schematic diagram of a photo-stereolithography device;

[0034] Figure 2 It is a structural schematic diagram of the molding and feeding module;

[0035] Figure 3 is a schematic diagram of the structure of a light curing module;

[0036] Figure 4 It is a schematic diagram of a double scraper slurry paving structure;

[0037] Figure 5 is a schematic diagram of the structure of the scraper assembly;

[0038] Among them, 1-frame; 2-molding and feeding module; 3-photocuring module; 4-double scraper slurry covering structure; 21-printing platform; 22-first forming cylinder; 23-feeding port; 24-peristaltic pump; 25-piston; 26-electric push rod; 27-electric push rod adapter plate; 31-optical machine; 32-optical machine protective shell; 33-optical machine fixed plate; 41-support frame; 42-drive motor; 43-motor adapter movable plate; 44-synchronous pulley; 45-synchronous belt; 46-scraper shaft; 47-scraper assembly; 471-hand-tightening nut; 472-scraper holder; 473-scraper upper knife holder; 474-spring; 475-scraper middle knife holder; 476-scraper lower knife holder; 477-scraper clamp; 478-blade. DETAILED DESCRIPTION

[0039] The present invention will be further described in detail below in conjunction with specific implementation methods.

[0040] Embodiment 1

[0041] like Figure 1-5 As shown, a device based on photocuring provided in this embodiment includes a frame 1, a molding feeding module 2, a photocuring module 3 and a double scraper slurry covering structure 4, the frame 1 has a working platform, the photocuring module 3 is arranged above the working platform, and the double scraper slurry covering structure 4 is arranged on the working platform; the molding feeding module 2 includes a first molding cylinder, a second molding cylinder and a feeding module, and a first station, a second station, a third station and a fourth station are arranged on the working platform. The scraper of the double scraper slurry covering structure 4 can rotate through the first station, the second station, the third station and the fourth station in sequence, the first molding cylinder and the second molding cylinder are connected to the second station and the fourth station respectively, and the feeding module is connected to the first station. Specifically, the frame 1 is used to support other structures and provide a stable working platform. The molding feeding module 2 is used to transport a certain amount of slurry to the printing platform 21, laying the foundation for the uniform covering of the slurry. The photocuring module 3 provides energy through the optical machine 31 to perform layer-by-layer curing to ensure the precise curing of the slurry during the printing process. The double-scraper slurry spreading structure 4 realizes high-speed spreading and circulating of slurry on the printing platform 21 through two sets of scraper assemblies 47 .

[0042] The first station is provided with a first through hole, and the feeding module is connected to the first through hole. The feeding module includes a feeding interface, a peristaltic pump 24 and a feeding container, the peristaltic pump 24 and the feeding container are connected through a feeding pipe, the peristaltic pump 24 and the feeding interface are connected through a connecting hose, and the feeding interface is connected to the first through hole. The peristaltic pump 24 ensures stable supply and precise control of the slurry, avoids waste or insufficient supply, and avoids the problems of slurry waste and uneven feeding in traditional equipment.

[0043] The first forming cylinder and the second forming cylinder have the same structure. Both the first forming cylinder and the second forming cylinder include a printing platform 21, a forming cylinder body, a piston 25, an electric push rod 26 and an electric push rod adapter plate 27. The electric push rod adapter plate 27 is fixedly connected to the bottom of the forming cylinder. The movable end of the electric push rod 26 passes through the electric push rod adapter plate 27 and is fixedly connected to the piston 25. The piston 25 is slidably connected to the forming cylinder, and the printing platform 21 is connected to the top surface of the piston 25. The second station and the fourth station are respectively provided with a second through hole and a fourth through hole. The printing platforms 21 of the first forming cylinder and the second forming cylinder structure are respectively embedded in the second through hole and the fourth through hole, and the printing platforms 21 of the first forming cylinder and the second forming cylinder structure can slide relative to the second through hole and the fourth through hole. Specifically, the movable end of the electric push rod 26 can slide relative to the electric push rod adapter plate 27, and the printing platform 21 is used to support the parts printed during the forming process. The two forming cylinders are located below the platform of the frame 1. After the electric push rod 26 under the forming cylinder moves the printing platform 21 to the printing plane through the piston 25, the two scraper assemblies 47 are divided into a first scraper assembly 47 and a second scraper assembly 47. The drive motor 42 drives the first scraper assembly 47 to reset to the first position, and the peristaltic pump 24 supplies the slurry to the feed port 23 through the pipeline. The drive motor 42 drives the first scraper assembly 47 installed on the scraper shaft 46 to rotate 180 degrees through the synchronous belt 45. During this period, the first scraper assembly 47 scrapes the printing platform 21 on the first scraper assembly 47. The slurry is scraped onto the printing platform 21 (second station) of the first forming cylinder 22 for light curing, and the peristaltic pump 24 then supplies the slurry to the feed port 23 through the pipeline; the first scraper assembly 47 rotates 180° again, and at this time the first scraper assembly 47 spreads the slurry onto the printing platform 21 (fourth station) of the second forming cylinder for light curing, and then scrapes the excess slurry back to the feed port 23, and the second scraper assembly 47 scrapes the slurry at the feed port 23 onto the printing platform 21 of the first forming cylinder 22 for light curing. After entering the cycle, during one rotation of the scraper shaft 46, the two layers of slurry in the two forming cylinders are light cured and the excess slurry is recycled, realizing high-speed spreading and recycling of the slurry.

[0044] A circular groove is provided on the working platform, which is divided into four equal parts: the first station, the second station, the third station and the fourth station. The scrapers of the first scraper assembly 47 and the second scraper assembly 47 rotate in the circular groove, and the printing plane is the bottom plane of the circular groove, that is, the surface contacted by the blade.

[0045] The light curing module 3 includes two light machines 31 , and the two light machines 31 correspond to the second station and the fourth station respectively.

[0046] The optical machine fixing plate 33 is fixedly connected to the frame 1, and an optical machine protective shell 32 is provided on the circumference of each optical machine 31. The optical machine protective shell 32 is installed on the optical machine fixing plate 33, and the optical machine fixing plate 33 is fixed to the frame 1 by bolts. The optical machine 31 is used to provide an energy source to solidify the slurry layer by layer during the printing process. The optical machine protective shell 32 is used to protect the optical machine 31 from external environmental factors, thereby extending the service life of the optical machine 31. The optical machine fixing plate 33 firmly mounts the optical machine 31 on the frame 1 to ensure that the optical machine 31 remains precisely positioned during the curing process to ensure uniform curing and printing accuracy of each layer of slurry. The light curing module 3 ensures stable energy transmission and efficient implementation of light curing during the printing process through the coordinated work of these components, thereby achieving high-quality printing effects.

[0047] Double scraper slurry paving structure, including:

[0048] The support frame 41 is connected to the frame 1; specifically, the support frame 41 is fixed on the working platform of the frame 1, and the support frame 41 can be prepared by profile processing.

[0049] The driving motor 42 is disposed on the supporting frame 41 . The driving motor 42 is an existing rotating motor and will not be described in detail herein.

[0050] The transmission assembly is connected to the output shaft of the drive motor 42 ; the transmission assembly can be a belt transmission structure, a gear transmission structure, etc., as long as it can transmit the power of the drive motor 42 to make the scraper shaft 46 rotate relative to the support frame 41 .

[0051] The scraper shaft 46 is connected to the transmission assembly, and the scraper shaft 46 is rotatably connected to the support frame 41; the scraper shaft 46 is rotatably connected to the support frame 41 through a bearing (that is, the scraper shaft 46 is rotatably connected to the motor transfer movable plate 43 through a bearing to achieve rotation relative to the support frame 41). A motor transfer movable plate 43 is fixed to the support frame, and the drive motor is fixedly connected to the motor transfer movable plate 43 through a screw, and the output shaft of the drive motor passes through the motor transfer movable plate 43 and is fixedly connected to the synchronous pulley 44, and the scraper shaft 46 passes through the motor transfer movable plate 43 and is connected to the synchronous pulley 44.

[0052] The scraper assembly 47 includes two groups of scraper assemblies, both of which are connected to the scraper shaft 46, and are symmetrically distributed along the center of the scraper shaft 46. Both of which are used to spread slurry on the printing platform 21 of the photocuring forming equipment.

[0053] The transmission assembly of this embodiment includes a synchronous belt 45 and a synchronous pulley 44 . There are two synchronous pulleys 44 . The two synchronous pulleys 44 are fixedly connected to the scraper shaft 46 and the output shaft of the driving motor 42 , respectively. The synchronous belt 45 is connected to the two synchronous pulleys 44 .

[0054] Each scraper assembly 47 includes a hand-tightening nut 471, a scraper frame 472, an upper scraper frame 473, a spring 474, a middle scraper frame 475, a lower scraper frame 476, a scraper clamping plate 477 and a blade 478. The scraper frame 472 is fixedly connected to the scraper shaft 46, the upper scraper frame 473 is fixedly connected to the scraper frame 472, the upper scraper frame 473 and the middle scraper frame 475 are matched with the hand-tightening nut 471 and the connecting bolt, the spring 474 is sleeved on the outside of the connecting bolt, the spring 474 is located between the upper scraper frame 473 and the middle scraper frame 475, and the connecting bolt can slide relative to the upper scraper frame 473; the middle scraper frame 475 is adjustably connected to the lower scraper frame 476, and the blade 478 is clamped and fixed to the lower scraper frame 476 by the scraper clamping plate 477. Specifically, the scraper clamping plate 477 is fixedly connected to the scraper lower blade frame 476 by bolts, a screw hole is provided in the axial direction of the scraper shaft 46, and the scraper frame 472 is fixed to the scraper shaft 46 by bolts and screw holes. The scraper frame 472 is provided with four through holes, and is fixedly connected to the scraper upper blade frame 473 by two bolts passing through the two through holes. The scraper upper blade frame 473 is provided with two through holes, and the hand-tightening nut 471 passes through the other two through holes of the scraper frame 472 and the two through holes of the scraper upper blade frame 473 in turn. The through hole is connected to the scraper middle blade holder 475, and the scraper middle blade holder 475 can slide in the scraper upper blade holder 473. The spring 474 can reset the scraper middle blade holder 475 when it slides into the scraper upper blade holder 473. The principle is that the hand nut 471 can slide in the through holes of the scraper holder 472 and the scraper upper blade holder 473. The outer diameter of the end of the hand nut 471 is larger than the inner diameter of the through hole, so that the hand nut 471 cannot pass through the through hole of the scraper holder 472, thereby limiting the hand nut 471 from falling off.

[0055] Ear buckles are provided on the scraper middle blade holder 475 and the scraper lower blade holder 476, and each ear buckle is provided with a connection hole. The two ear buckles are connected to nuts through bolts passing through the two connection holes. Specifically, the angle between the scraper lower blade holder 476 and the scraper middle blade holder 475 is mainly formed by loosening the nut so that the scraper middle blade holder 475 and the scraper lower blade holder 476 can rotate relative to each other through the ear buckles. After adjusting the relative angle, the adjustment can be completed by tightening the nut. Through this setting, it is ensured that the thickness of the slurry is uniform and accurate each time the slurry is laid, so as to achieve efficient and uniform laying of each layer of slurry and ensure the quality and accuracy of the printed part.

[0056] The innovatively designed double-scraper slurry paving structure 4 in the above embodiment adopts a double-scraper assembly 47, which only needs to cooperate with double forming cylinders to perform efficient slurry paving on the printing platform 21, and at the same time, the excess slurry can be recycled during the paving process.

[0057] It solves the problems of slurry waste, low coating efficiency, poor uniformity and so on in the prior art, and significantly reduces production costs by improving the utilization rate of slurry and the working efficiency of equipment. It can meet the requirements of higher production efficiency and play an important role in the high-precision and high-quality printing process.

[0058] Therefore, the double-scraper slurry paving structure 4 is not only of great significance in improving the efficiency and economy of photocuring additive manufacturing technology, but also provides beneficial technical support and innovation direction for the further development of additive manufacturing equipment in the future.

[0059] Embodiment 2

[0060] The present embodiment provides an efficient photocuring forming method, the method comprising the following steps: after the electric push rod 26 under the forming cylinder moves the printing platform 21 to the printing plane through the piston 25, the driving motor 42 drives the first scraper assembly 47 to reset to the first station, the peristaltic pump 24 supplies the slurry to the feed port 23 through the connecting hose, the driving motor 42 drives the first scraper assembly 47 installed on the scraper shaft 46 to rotate 180° through the synchronous belt 45, during which the first scraper assembly 47 scrapes the slurry on the printing plane to the printing platform 21 of the first forming cylinder 22 for photocuring, and the peristaltic pump 24 supplies the slurry to the feed port 23 through the connecting hose; the first scraper assembly 47 rotates 180° again, at which time the first scraper assembly 47 spreads the slurry on the printing platform 21 of the second forming cylinder for photocuring, and then scrapes the excess slurry back to the feed port 23, and the second scraper assembly 47 scrapes the slurry at the feed port 23 to the printing platform 21 of the first forming cylinder 22 for photocuring. After entering the cycle, during one rotation of the scraper shaft 46, the two layers of slurry in the two forming cylinders are photocured and the excess slurry is recycled, thereby achieving high-speed paving and recycling of the slurry.

[0061] The method comprises the following steps:

[0062] S1, the electric push rods 26 of the first forming cylinder and the second forming cylinder move the printing platform 21 to the same height as the printing plane through the piston 25;

[0063] S2, the driving motor 42 drives the first scraper assembly 47 to return to the first position, and the second scraper assembly 47 symmetrical to the center thereof is correspondingly at the third position;

[0064] S3, the peristaltic pump 24 supplies the slurry to the feed port 23 through the connecting hose;

[0065] S4, the driving motor 42 drives the first scraper assembly 47 to rotate and arrive at the third station via the second station, and the slurry is spread on the printing platform 21; the second scraper assembly 47 arrives at the first station via the fourth station and waits;

[0066] S5, the optical machine 31 performs light curing on the slurry on the printing platform 21;

[0067] S6, the electric push rod 26 in the first forming cylinder and the second forming cylinder drives the printing platform 21 to descend one level through the piston 25, and the peristaltic pump 24 supplies the slurry to the feeding port 23 again through the connecting pipeline;

[0068] S7, the first scraper assembly 47 arrives at the first station via the fourth station, and spreads the slurry on the printing platform 21 of the second forming cylinder; the second scraper assembly 47 arrives at the third station via the second station, and spreads the slurry on the printing platform 21 of the first forming cylinder 22;

[0069] S8, the two photo machines 31 respectively perform photocuring on the slurry on the two printing platforms 21;

[0070] S9, repeat S3 to S8 until the printing of the models on the two printing planes is completed.

[0071] The parts not mentioned in this embodiment are the same as those in the first embodiment.

[0072] 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 photo-curing forming device, characterized in that: include: A frame, wherein the frame has a working platform, and the working platform is provided with a first working station, a second working station, a third working station and a fourth working station; A molding and feeding module, the molding and feeding module comprises a first molding cylinder, a second molding cylinder and a feeding module, the first molding cylinder and the second molding cylinder are connected to the second station and the fourth station respectively, and the feeding module is connected to the first station; A light curing module, which is arranged above the working platform; The double-scraper slurry paving structure includes a drive motor, a scraper shaft and two groups of scraper assemblies. The drive motor is fixedly connected to the frame, and the drive motor drives the scraper shaft to rotate. The two groups of scraper assemblies are connected to the scraper shaft. The two groups of scraper assemblies are symmetrically distributed along the center of the scraper shaft. The scrapers of the two groups of scraper assemblies can rotate through the first station, the second station, the third station and the fourth station in sequence.

2. A photo-curing device according to claim 1, characterized in that: The double-scraper slurry paving structure also includes a support frame and a transmission assembly. The drive motor is fixedly connected to the frame through the support frame, the support frame is connected to the frame, the transmission assembly is connected to the output shaft of the drive motor, the scraper shaft is connected to the transmission assembly, and the scraper shaft is rotatably connected to the support frame.

3. A photo-curing device according to claim 2, characterized in that: The transmission assembly includes a synchronous belt and a synchronous pulley. There are two synchronous pulleys. The two synchronous pulleys are fixedly connected to the scraper shaft and the output shaft of the driving motor respectively, and the synchronous belt is connected to the two synchronous pulleys.

4. A photo-curing device according to claim 1, characterized in that: Each scraper assembly includes a hand-tightening nut, a scraper frame, an upper scraper frame, a spring, a middle scraper frame, a lower scraper frame, a scraper clamp and a blade. The scraper frame is fixedly connected to the scraper shaft, the upper scraper frame is fixedly connected to the scraper frame, the upper scraper frame and the middle scraper frame are matched with the hand-tightening nut and the connecting bolt, the spring is sleeved on the outside of the connecting bolt, the spring is located between the upper scraper frame and the middle scraper frame, and the connecting bolt can slide relative to the upper scraper frame; the middle scraper frame and the lower scraper frame are adjustably connected, and the blade is clamped and fixed to the lower scraper frame by the scraper clamp.

5. A photo-curing device according to claim 4, characterized in that: Ear buckles are arranged on the scraper middle blade holder and the scraper lower blade holder, each ear buckle is provided with a connecting hole, and the two ear buckles are connected with nuts through bolts passing through the two connecting holes.

6. A photo-curing device according to claim 1, characterized in that: The first station is provided with a first through hole, and the feeding module is communicated with the first through hole.

7. A photo-curing device according to claim 6, characterized in that: The feeding module comprises a feeding interface, a peristaltic pump and a feeding container. The peristaltic pump and the feeding container are connected via a feeding pipeline. The peristaltic pump and the feeding interface are connected via a connecting hose. The feeding interface is in communication with the first through hole.

8. A photo-curing device according to claim 1, characterized in that: The first forming cylinder and the second forming cylinder have the same structure. Both the first forming cylinder and the second forming cylinder include a printing platform, a forming cylinder body, a piston, an electric push rod and an electric push rod adapter plate. The electric push rod adapter plate is fixedly connected to the bottom of the forming cylinder, the movable end of the electric push rod passes through the electric push rod adapter plate and is fixedly connected to the piston, the piston is slidingly connected to the forming cylinder, and the printing platform is connected to the top surface of the piston; the second station and the fourth station are respectively provided with a second through hole and a fourth through hole, the printing platforms of the first forming cylinder and the second forming cylinder structure are respectively embedded in the second through hole and the fourth through hole, and the printing platforms of the first forming cylinder and the second forming cylinder structure can slide relative to the second through hole and the fourth through hole, respectively.

9. A photo-curing device according to claim 1, characterized in that: The photocuring module includes two photomachines, which correspond to the second station and the fourth station respectively; each photomachine is fixedly connected to the frame through a photomachine fixing plate, and a photomachine protective shell is provided on the circumference of each photomachine, which is installed on the photomachine fixing plate, and the photomachine fixing plate is fixed to the frame by bolts.

10. A photo-curing forming method, characterized in that: The method adopts a photo-curing forming device according to any one of claims 1 to 9, and the method comprises the following steps: S1, the electric push rods of the first forming cylinder and the second forming cylinder move the printing platform to the same height as the printing plane through the piston; S2, the driving motor drives one set of scraper assemblies to reset to the first station, and another set of scraper assemblies symmetrical to the center thereof is at the third station; S3, the peristaltic pump supplies the slurry to the feed port through the connecting hose; S4, the driving motor drives one set of scraper assemblies to rotate and arrive at the third station via the second station, and the slurry is spread on the printing platform; the other set of scraper assemblies arrives at the first station via the fourth station and waits; S5, the optical machine performs light curing on the slurry on the printing platform; S6, the electric push rods in the first forming cylinder and the second forming cylinder drive the printing platform to descend one level through the piston, and the peristaltic pump supplies the slurry to the feeding port again through the connecting pipeline; S7, one set of scraper assemblies arrives at the first station via the fourth station, and spreads the slurry on the printing platform of the second forming cylinder; another set of scraper assemblies arrives at the third station via the second station, and spreads the slurry on the printing platform of the first forming cylinder; S8, two photo machines perform photocuring on the slurry on the two printing platforms respectively; S9, repeat S3 to S8 until the printing of the models on the two printing planes is completed.

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