A photosensitive resin additive 3D printer

Abstract

The application belongs to the technical field of 3D printing, and particularly relates to a photosensitive resin additive 3D printer, which comprises a machine body, a top cover fixedly installed on the top of the machine body, a laser emission structure installed on the inner side of the top cover, a forming box fixedly installed on the inner wall of the machine body, a support slidably installed on the inner wall of the forming box, a plurality of support plates and support columns arranged on the inner side of the support, the support plates and the support columns being arranged in a cross manner, the highest point of the support plate being higher than that of the support column, and torsion spring shafts fixedly installed on the inner walls of the support plates. After model construction is completed, the lifting assembly pushes the support to drive the support plate and the support column to move upwards, the support plate is in contact with the extrusion assembly and then rotates downwards around the torsion spring shaft, the model is changed from being supported by the support plate to being supported by the support column, and the automatic separation of the support plate and the model is realized, manual stripping of the model by using tools is not needed, the workload and time of manual operation are greatly reduced, and the production efficiency is improved.

Description

Technical Field

[0001] This invention belongs to the field of 3D printing technology, specifically a photosensitive resin additive 3D printer. Background Technology

[0002] Photosensitive resin additive 3D printing technology, as a highly innovative and valuable rapid prototyping technology, has demonstrated unique advantages in many fields. Based on the principle that photosensitive resin undergoes a polymerization reaction under specific wavelength light, it constructs a three-dimensional solid model by curing photosensitive resin layer by layer. This technology has significant characteristics such as fast molding speed, high precision, and good surface quality. It can directly manufacture complex and multifunctional parts and product prototypes, and is widely used in aerospace, automotive manufacturing, medical devices, art design and other industries, providing an efficient and convenient means for product research and development, design and production.

[0003] In the process of photosensitive resin additive 3D printing, after the model has completed layer-by-layer printing in the forming tank, the processing plate will rise from the forming tank. At this time, due to the adhesiveness of the photosensitive resin and the contact between the model and the processing plate during the printing process, the model often sticks tightly to the processing plate. To remove the model from the processing plate, the operator usually uses a scraper to manually peel it off. This not only increases the difficulty and complexity of the operation, but also consumes a lot of time and effort, resulting in low efficiency in model removal and seriously affecting the overall processing efficiency of 3D printing.

[0004] Therefore, the present invention provides a photosensitive resin additive 3D printer. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by the present invention to solve its technical problem is as follows: A photosensitive resin additive 3D printer of the present invention includes a body, a top cover fixedly installed on the top of the body, a laser emitting structure installed on the inner side of the top cover, a molding box fixedly installed on the inner wall of the body, a bracket slidably installed on the inner wall of the molding box, a plurality of support plates and support columns arranged on the inner side of the bracket, the support plates and support columns being arranged in a cross pattern, the highest point of the support plate being higher than the highest point of the support column, a torsion spring shaft fixedly installed on the inner wall of each of the support plates, both ends of each torsion spring shaft being installed on the inner wall of the bracket, the support plate abutting against the support column through the torsion spring shaft, an extrusion assembly arranged above the bracket, and a lifting assembly arranged below the bracket, the extrusion assembly being used to extrude the support plate under the action of the lifting assembly to achieve automatic peeling.

[0007] Preferably, the extrusion assembly includes a mounting plate, which is fixedly installed on the top of the forming box. Several extrusion plates are fixedly installed on the bottom of the horizontal section of the mounting plate, and the several extrusion plates are respectively located above one end of each support plate.

[0008] Preferably, the lifting assembly includes a cylinder, which is fixedly installed on the inner wall of the machine body. The output shaft of the cylinder is fixedly installed with a lifting frame. The outer wall of the lifting frame is slidably connected to the inner wall of the forming box. Both ends of the lifting frame are fixedly connected to the bottom of the support.

[0009] Preferably, a driving component is provided on the inner side of the bracket, and a draining component is provided on one side of the molding box. The support column transports the model to the inner side of the draining component for draining via the driving component.

[0010] Preferably, the drive assembly includes a plurality of rotating shafts, which are respectively fixedly installed on the inner wall of the support column. Both ends of the plurality of rotating shafts are rotatably installed on the inner wall of the bracket. One end of each of the plurality of rotating shafts is fixedly installed with a transmission wheel. A transmission belt is installed between the plurality of transmission wheels. A micro motor is fixedly installed on the inner wall of the bracket. The output end of the micro motor is fixedly connected to one end of one of the rotating shafts.

[0011] Preferably, a plurality of positioning posts are fixedly installed on the inner wall of the bracket, and positioning wheels are rotatably installed on the outer walls of the plurality of positioning posts, and the plurality of positioning wheels are connected to the transmission belt for transmission.

[0012] Preferably, the draining assembly includes a draining tank, which is formed on the inner wall of the machine body and located on one side of the forming box. A filter plate is detachably installed on the inner wall of the draining tank.

[0013] Preferably, the filter plate is inclined, and the inclination angle of the filter plate is 5-15°.

[0014] Preferably, a plurality of extrusion blocks are uniformly fixedly installed on the outer walls of the plurality of support columns, and a plurality of fixing plates are fixedly installed on the inner side of the bracket. A scraper is fixedly installed between each fixing plate and the bracket, and the scraper is respectively in contact with the support column.

[0015] Preferably, a base is fixedly installed at the bottom of the machine body, a sealed door is hinged to the inner wall of the machine body, a transparent observation window is fixedly installed on the inner wall of the sealed door, and a control panel is fixedly installed on the inner wall of the machine body.

[0016] The beneficial effects of this invention are as follows:

[0017] 1. After the model is built, the lifting component pushes the bracket to move the support plate and support column upward. After the support plate comes into contact with the extrusion component, it rotates downward around the torsion spring axis, so that the model changes from being supported by the support plate to being supported by the support column, realizing the automatic separation of the support plate and the model. This process does not require manual peeling of the model with tools, which greatly reduces the workload and time of manual operation, improves production efficiency, and reduces the risk of damage to the model due to improper manual operation.

[0018] 2. The drive component drives the various support columns to rotate synchronously to transport the model, moving the model above the draining component. By placing the model above the draining component, the resin adhering to the model surface can be drained and recycled, reducing material costs, preventing resin from dripping randomly and contaminating the printer's internal environment and components, keeping the equipment clean, and preventing resin from forming flow marks or bubbles on the model surface, thus reducing the workload of subsequent processing.

[0019] 3. By driving the support column to rotate through the drive component, using the squeezing block to make the support plate swing back and forth, and the scraper to clean the surface of the support column, the cleaning work can be completed in a short time, greatly reducing the downtime for cleaning the equipment, thereby improving the overall printing efficiency and allowing the equipment to be put into the next round of printing tasks more quickly. The automatic cleaning function allows the equipment to quickly enter the next printing preparation state without waiting for manual cleaning after completing a printing. Attached Figure Description

[0020] The invention will now be further described with reference to the accompanying drawings.

[0021] Figure 1 This is a three-dimensional structural schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the body of the present invention;

[0023] Figure 3 This is a cross-sectional view of the molding box structure of the present invention;

[0024] Figure 4 This is a schematic diagram of the top structure of the bracket of the present invention;

[0025] Figure 5 This is the invention Figure 4 Schematic diagram of the structure at point A in the middle;

[0026] Figure 6 This is a schematic diagram of the structure at the support column of the present invention;

[0027] Figure 7 This is a schematic diagram of the mounting plate structure of the present invention;

[0028] Figure 8This is a cross-sectional view of the support structure of the present invention;

[0029] Figure 9 This is the invention Figure 8 Schematic diagram of the structure at point B;

[0030] Figure 10 This is a schematic diagram of the bottom structure of the bracket of the present invention;

[0031] Figure 11 This is the invention Figure 10 Schematic diagram of the structure at point C.

[0032] In the diagram: 1. Machine body; 2. Top cover; 3. Molding box; 4. Bracket; 5. Support plate; 6. Support column; 7. Torsion spring shaft; 8. Mounting plate; 9. Extrusion plate; 10. Cylinder; 11. Lifting frame; 12. Rotary shaft; 13. Transmission wheel; 14. Transmission belt; 15. Micro motor; 16. Positioning column; 17. Positioning wheel; 18. Draining tank; 19. Filter plate; 20. Extrusion block; 21. Fixing plate; 22. Scraper; 23. Base; 24. Sealed door; 25. Transparent observation window; 26. Control panel. Detailed Implementation

[0033] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0034] like Figures 1 to 7As shown in the embodiment of the present invention, a photosensitive resin additive 3D printer includes a body 1. A top cover 2 is fixedly installed on the top of the body 1. A laser emitting structure is installed on the inner side of the top cover 2. A molding box 3 is fixedly installed on the inner wall of the body 1. A bracket 4 is slidably installed on the inner wall of the molding box 3. A plurality of support plates 5 and support columns 6 are arranged on the inner side of the bracket 4. The support plates 5 and support columns 6 are arranged in a cross pattern. The highest point of the support plate 5 is higher than the highest point of the support column 6. A torsion spring shaft 7 is fixedly installed on the inner wall of each of the support plates 5. Both ends of each torsion spring shaft 7 are installed on the inner wall of the bracket 4. The support plates 5 are connected by... The torsion spring shafts 7 abut against the support columns 6. A pressing assembly is located above the bracket 4, and a lifting assembly is located below it. The pressing assembly is used to press the support plate 5 under the action of the lifting assembly to achieve automatic peeling. After the device is started, the photosensitive resin undergoes a polymerization reaction under the specific wavelength light of the laser emission structure, curing the photosensitive resin layer by layer to construct a three-dimensional solid model. Since the highest point of the support plate 5 is higher than the highest point of the support column 6, the completed model is supported by the support plate 5. After the model is completed, the lifting assembly will push the bracket 4 to move the support plate 5 and support column 6 upwards. 5. During the upward movement, the model is pushed out of the liquid resin. As the support plate 5 moves upward, it comes into contact with the extrusion assembly, which compresses the support plate 5, causing it to rotate downwards around the torsion spring shaft 7. After rotation, the highest point of the support plate 5 will be lower than the highest point of the support column 6, and the model will then be supported by the support column 6 instead of the support plate 5. Therefore, the support column 6 separates the support plate 5 from the model during downward rotation. In summary, after the model is constructed, the lifting assembly pushes the bracket 4, causing the support plate 5 and support column 6 to move upwards. After the support plate 5 comes into contact with the extrusion assembly, it rotates downwards around the torsion spring shaft 7, causing the model to move downwards from the support plate 5. The support plate 5 is transformed into a support column 6, realizing the automatic separation of the support plate 5 from the model. This process eliminates the need for manual peeling of the model using tools, greatly reducing the workload and time of manual operation, improving production efficiency, and reducing the risk of damage to the model due to improper manual operation. From the curing and printing of photosensitive resin to the automatic peeling of the model, the entire process is completed automatically inside the equipment, forming a coherent integrated operation process. This highly automated design reduces the links of manual intervention, reduces the impact of human factors on printing quality and efficiency, and makes the printing process more stable and reliable.

[0035] like Figure 3 and Figure 7As shown, the extrusion assembly includes a mounting plate 8, which is fixedly installed on the top of the forming box 3. Several extrusion plates 9 are fixedly installed on the bottom of the horizontal section of the mounting plate 8, and the extrusion plates 9 are respectively located above one end of each support plate 5. The extrusion plates 9 are arranged above the forming box 3 through the mounting plate 8, and each extrusion plate 9 is aligned with each support plate 5. During the process of the support plate 5 being moved upward by the bracket 4, since the extrusion plates 9 are located on the path of the support plate 5, the extrusion plates 9 will simultaneously extrude each support plate 5. After being extruded, the support plate 5 will rotate downward around the torsion spring shaft 7, thereby realizing the automatic peeling of the model. When the support plate 5 is moved downward by the bracket 4, the extrusion force on the support plate 5 disappears, and the torsion spring shaft 7 can automatically restore the support plate 5 to the initial position through its own elasticity, preparing for the next printing. This flexible rotation mechanism makes the automatic peeling process smoother and reduces the probability of mechanical jamming and failure.

[0036] like Figure 3 As shown, the lifting assembly includes a cylinder 10, which is fixedly installed on the inner wall of the machine body 1. The output shaft of the cylinder 10 is fixedly installed with a lifting frame 11. The outer wall of the lifting frame 11 is slidably connected to the inner wall of the forming box 3. The two ends of the lifting frame 11 are fixedly connected to the bottom of the support 4. When the telescopic cylinder 10 extends or retracts, it will drive the lifting frame 11 to rise or fall. When the lifting frame 11 rises or falls, it will drive the support 4 to rise or fall. By controlling the telescopic cylinder 10 to extend or retract, the rise or fall of the support 4 can be controlled.

[0037] like Figure 2 , Figure 6 and Figures 8 to 9 As shown, a drive assembly is installed inside the bracket 4, and a drain assembly is installed on one side of the molding box 3. The support column 6 transports the model to the inside of the drain assembly for draining via the drive assembly. The drain assembly is located on one side of the molding box 3. After the support plate 5 is separated from the model, the model is supported by the support column 6. At this time, the drive assembly is activated, which drives each support column 6 to rotate synchronously. When the support column 6 rotates, it transports the model, eventually moving the model to the top of the drain assembly. By placing the model on the top of the drain assembly, the resin adhering to the model surface can be drained and recycled, reducing material costs, preventing resin from dripping randomly and causing pollution to the internal environment and components of the printer, keeping the inside of the equipment clean, and preventing resin from forming flow marks or bubbles on the model surface, thus reducing the workload of subsequent processing.

[0038] like Figure 6 and Figures 8 to 9As shown, the drive assembly includes a plurality of rotating shafts 12, each fixedly mounted on the inner wall of a support column 6. Both ends of each rotating shaft 12 are rotatably mounted on the inner wall of a bracket 4. A transmission wheel 13 is fixedly mounted on one end of each rotating shaft 12. A transmission belt 14 is connected between the transmission wheels 13. A micro motor 15 is fixedly mounted on the inner wall of the bracket 4, and the output end of the micro motor 15 is fixedly connected to one end of one of the rotating shafts 12. The support columns 6 are rotatably connected to the bracket 4 via the rotating shafts 12. Each end is equipped with a drive wheel 13, which is connected by a drive belt 14. After the micro motor 15 is started, the micro motor 15 will drive one of the rotating shafts 12 to rotate. This rotating shaft 12 will drive the other rotating shafts 12 to rotate synchronously through the drive wheel 13 and the drive belt 14. When each rotating shaft 12 rotates, it will drive each support column 6 to rotate. Since the model is located above the support column 6, the model will be transported when the support column 6 rotates, thereby achieving the effect of automatically transporting the model to the draining component for draining.

[0039] like Figure 9 As shown, several positioning posts 16 are fixedly installed on the inner wall of the bracket 4, and positioning wheels 17 are rotatably installed on the outer walls of the positioning posts 16. The positioning wheels 17 are all connected to the transmission belt 14. The positioning posts 16 are used to install the positioning wheels 17 on the inner side of the bracket 4, so that there is a positioning wheel 17 between each two adjacent transmission wheels 13. The positioning wheels 17 limit the transmission belt 14, increase the contact area between the transmission belt 14 and each transmission wheel 13. The larger the contact area, the greater the friction, and the more effectively the transmission belt 14 can be prevented from slipping on the transmission wheels 13. Especially when the micro motor 15 starts, accelerates or bears a large load, sufficient friction can ensure that the power can be transmitted stably and efficiently, so that each rotating shaft 12 can rotate synchronously, thereby ensuring the smoothness of the model transport driven by the support column 6.

[0040] like Figure 2As shown, the degreasing assembly includes a degreasing tank 18, which is located on the inner wall of the machine body 1 and on one side of the molding box 3. A filter plate 19 is detachably installed on the inner wall of the degreasing tank 18. The model is conveyed to the surface of the filter plate 19 by the support column 6 and placed there. The resin adhering to the surface of the model drips naturally under the action of gravity. The dripping resin passes through the filter plate 19 and enters the degreasing tank 18 for collection. This design not only realizes the recycling of resin and reduces material costs, but also avoids the random dripping of resin from polluting the internal environment and components of the printer, keeping the inside of the equipment clean. Through the degreasing operation, it prevents the resin from forming flow marks or bubbles on the surface of the model. Bubbles can affect the smoothness and precision of the model surface, reducing print quality. Reducing these defects ensures the quality of the model surface, making the printed model more beautiful and detailed, meeting the demand for high-quality models. Since the drain tank 18 is located on one side of the forming box 3, the device can continue the next round of printing while the model is draining, allowing the draining and printing to proceed simultaneously. This parallel operation mode makes full use of the equipment's working time, reduces the overall printing cycle, and improves production efficiency. For enterprises or users who need to print a large number of models, it can complete more printing tasks in a shorter time, meet production needs, and enhance market competitiveness.

[0041] like Figure 2 As shown, the filter plate 19 is tilted at an angle of 5-15°. With the filter plate 19 tilted, the resin flows rapidly along the tilted surface under gravity. Compared to a horizontally placed filter plate, the tilted setting significantly shortens the time it takes for the resin to drip from the model surface to the draining tank 18, accelerating the entire draining process. This allows the model to complete the draining step faster, reducing its dwell time in the draining area and thus improving the overall printing efficiency. It is particularly suitable for scenarios requiring continuous high-volume printing. The 5-15° tilt angle design allows the resin on the model surface to drip more fully under gravity. This angle range prevents the model from sliding or shifting due to excessive tilting, while ensuring the resin flows smoothly down the tilted surface, maximizing the removal of excess resin adhering to the model surface. After such thorough draining, there is less resin residue on the model surface, which is beneficial for subsequent curing, making the model surface smoother and flatter, and improving print quality.

[0042] like Figure 5 and Figures 10 to 11As shown, several extrusion blocks 20 are uniformly fixedly installed on the outer walls of several support columns 6, and several fixing plates 21 are fixedly installed on the inner side of the bracket 4. Each fixing plate 21 is fixedly installed with a scraper 22 between it and the bracket 4, and the scraper 22 is in contact with the support column 6. Extrusion blocks 20 are provided on the outer walls of the support columns 6. When the support columns 6 rotate, the extrusion blocks 20 will also rotate. When the model is separated from the support plate 5, since the support plate 5 rotates downward and away from the support column 6, when the support column 6 drives the extrusion blocks 20 to rotate, The extrusion block 20 will not contact the support plate 5. After the support column 6 completes its conveying work, the bracket 4 drives the support plate 5 and support column 6 to move downwards. Under the action of the torsion spring shaft 7, the support plate 5 is once again in contact with the support column 6. At this time, the drive assembly drives the support column 6 to rotate. When the support column 6 rotates, it will cyclically extrude the support plate 5 through the extrusion block 20, thereby causing the support plate 5 to swing back and forth. Through the swinging of the support plate 5, the resin on the surface of the support plate 5 can be accelerated to fall off, allowing the resin to detach from the surface of the support plate 5 before curing, thus achieving... The automatic cleaning of the support plate 5 is achieved by a scraper 22 at the bottom of the support column 6. As the support column 6 rotates, the scraper 22 scrapes away resin from its surface. Simultaneously, the reciprocating swing of the support plate 5 strikes the support column 6, causing it to vibrate slightly and dislodge the scraped resin. This results in automatic cleaning of the support column 6. The drive assembly rotates the support column 6, the squeezing block 20 causes the support plate 5 to swing back and forth, and the scraper 22 cleans the surface of the support column 6. This process completes the cleaning in a short time, significantly reducing downtime for cleaning and improving overall printing efficiency. The automatic cleaning function allows the equipment to quickly prepare for the next printing task without waiting for manual cleaning after each print job. Especially during batch printing, this continuous printing capability significantly shortens the production cycle, meets the needs of large-scale production, improves production efficiency and capacity, and saves time and costs for businesses.

[0043] like Figures 1 to 2As shown, a base 23 is fixedly installed at the bottom of the machine body 1, a sealing door 24 is hinged to the inner wall of the machine body 1, a transparent observation window 25 is fixedly installed on the inner wall of the sealing door 24, and a control panel 26 is fixedly installed on the inner wall of the machine body 1. The base 23 is fixedly installed at the bottom of the machine body 1, providing a solid and stable support foundation for the entire 3D printer. The sealing door 24 is hinged to the inner wall of the machine body 1, which can effectively isolate the printing area from the external environment during the printing process, preventing dust, impurities, etc. from entering the printing cavity, providing a relatively clean environment for the printing process, reducing the interference of external factors on printing, and improving the printing success rate. The transparent observation window 25 is fixedly installed on the inner wall of the sealing door 24, allowing the operator to observe the situation inside the printing cavity in real time through the observation window. The control panel 26 can be used to conveniently set printing parameters, such as printing speed, layer thickness, exposure time, etc., to achieve precise control of the printing process.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A photosensitive resin additive 3D printer, comprising a body (1), characterized in that: A top cover (2) is fixedly installed on the top of the body (1). A laser emitting structure is installed on the inner side of the top cover (2). A molding box (3) is fixedly installed on the inner wall of the body (1). A bracket (4) is slidably installed on the inner wall of the molding box (3). Several support plates (5) and support columns (6) are arranged on the inner side of the bracket (4). The support plates (5) and support columns (6) are arranged in a cross pattern. The highest point of the support plate (5) is higher than the highest point of the support column (6). Torsion spring shafts (7) are fixedly installed on the inner walls of several support plates (5). Both ends of each torsion spring shaft (7) are installed on the inner wall of the bracket (4). The support plate (5) abuts against the support column (6) through the torsion spring shaft (7). An extrusion assembly is arranged above the bracket (4). A lifting assembly is arranged below the bracket (4). The extrusion assembly is used to extrude the support plate (5) under the action of the lifting assembly to achieve automatic peeling. The lifting assembly includes a cylinder (10), which is fixedly installed on the inner wall of the machine body (1). The output shaft of the cylinder (10) is fixedly installed with a lifting frame (11). The outer wall of the lifting frame (11) is slidably connected to the inner wall of the forming box (3). The two ends of the lifting frame (11) are fixedly connected to the bottom of the bracket (4).

2. The photosensitive resin additive 3D printer according to claim 1, characterized in that: The extrusion assembly includes a mounting plate (8), which is fixedly installed on the top of the forming box (3). Several extrusion plates (9) are fixedly installed on the bottom of the horizontal section of the mounting plate (8), and the several extrusion plates (9) are respectively located above one end of each support plate (5).

3. The photosensitive resin additive 3D printer according to claim 1, characterized in that: The inner side of the bracket (4) is provided with a driving component, and the side of the molding box (3) is provided with a draining component. The support column (6) transports the model to the inner side of the draining component for draining through the driving component.

4. A photosensitive resin additive 3D printer according to claim 3, characterized in that: The drive assembly includes a rotating shaft (12), which is provided in a plurality of manner and is fixedly installed on the inner wall of the support column (6). Both ends of the plurality of rotating shafts (12) are rotatably installed on the inner wall of the bracket (4). A transmission wheel (13) is fixedly installed on one end of the plurality of rotating shafts (12). A transmission belt (14) is installed between the plurality of transmission wheels (13). A micro motor (15) is fixedly installed on the inner wall of the bracket (4). The output end of the micro motor (15) is fixedly connected to one end of one of the rotating shafts (12).

5. A photosensitive resin additive 3D printer according to claim 4, characterized in that: The inner wall of the bracket (4) is fixedly installed with a number of positioning columns (16), and the outer wall of each of the positioning columns (16) is rotatably installed with positioning wheels (17), and each of the positioning wheels (17) is connected to the transmission belt (14) for transmission.

6. A photosensitive resin additive 3D printer according to claim 3, characterized in that: The draining assembly includes a draining tank (18), which is located on the inner wall of the body (1). The draining tank (18) is located on one side of the molding box (3). A filter plate (19) is detachably installed on the inner wall of the draining tank (18).

7. A photosensitive resin additive 3D printer according to claim 6, characterized in that: The filter plate (19) is inclined, and the inclination angle of the filter plate (19) is 5-15°.

8. A photosensitive resin additive 3D printer according to claim 1, characterized in that: A number of extrusion blocks (20) are uniformly fixedly installed on the outer wall of a number of support columns (6), and a number of fixing plates (21) are fixedly installed on the inner side of the bracket (4). Each fixing plate (21) is fixedly installed with a scraper (22) between it and the bracket (4), and the scraper (22) is respectively attached to the support column (6).

9. A photosensitive resin additive 3D printer according to claim 1, characterized in that: A base (23) is fixedly installed at the bottom of the body (1), a sealing door (24) is hinged to the inner wall of the body (1), a transparent observation window (25) is fixedly installed on the inner wall of the sealing door (24), and a control panel (26) is fixedly installed on the inner wall of the body (1).

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