A liquid leveling device for laser 3D printers

Abstract

The application provides a liquid surface flatness device for a laser 3D printer, comprising a 3D printer body, a forming platform, a resin tank, a sinking accommodating part, an in-out mechanism, a turning mechanism and a scraping and stirring part; the forming platform and the resin tank are arranged in the 3D printer body, the forming platform is behind the resin tank and is aligned with the resin tank, the sinking accommodating part is arranged on the 3D printer body, the in-out mechanism is arranged on the sinking accommodating part, the turning mechanism is arranged on the in-out mechanism, and the scraping and stirring part is arranged on the turning mechanism; the liquid surface flatness device for the laser 3D printer has high flexibility, does not occupy the space inside the resin tank for a long time, thereby avoiding affecting the printing process, and can improve the quality of the printing products in all aspects.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and more specifically, to a liquid leveling device for a laser 3D printer. Background Technology

[0002] 3D printing is a manufacturing technology that uses digital model files to transform materials from a liquid or solid state into a solid object by layering them. 3D printing can rapidly prototype complex structures and shapes, offering advantages such as high efficiency, cost-effectiveness, and environmental friendliness. Based on different forming principles and material types, 3D printing technology can be categorized into several types, such as Fused Deposition Modeling (FDM), Selective Laser Sintering (SLS), Powder Bed Inkjet Printing (BJ), and Solidification Laser Printing (SLA).

[0003] Stereolithography (SLA) is a 3D printing technology that uses liquid photosensitive resin as the main raw material, scans it with a computer-controlled laser to solidify the resin surface, and then deposits the resin layer by layer. SLA technology is widely used due to its high degree of automation in the molding process, good surface quality of the prototypes, high dimensional accuracy, and ability to achieve fine-grained dimensions.

[0004] In the photopolymerization process, to ensure the quality of the printed product, the model file is layered to ensure that each layer has a consistent thickness. This facilitates the fusion of subsequent layers. However, in the actual printing process, due to the high viscosity of photosensitive resin, the liquid surface is difficult to level quickly after each layer has cured. This results in the resin not being evenly applied to the previous layer, severely affecting the accuracy of the object. In addition, since photosensitive resin is a gel-like substance composed of polymers, it contains some heavier particles that are prone to settling. Therefore, during the printing process, it is very easy for sedimentation or stratification to occur due to its own settling effect, affecting the printing effect. Summary of the Invention

[0005] The purpose of this invention is to provide a liquid leveling device for laser 3D printers to solve the above-mentioned problems.

[0006] To achieve the above objectives, the present invention provides a liquid leveling device for a laser 3D printer, comprising: a 3D printer body, a forming platform, a resin tank, a sinking receiving part, an inlet / outlet mechanism, a turning mechanism, and a scraping and shaking part;

[0007] The molding platform and the resin tank are both disposed within the 3D printer body, with the molding platform positioned behind and aligned with the resin tank. The sinking receiving portion is disposed on the 3D printer body, the infeed mechanism is disposed on the sinking receiving portion, the turning mechanism is disposed on the infeed mechanism, and the scraping and agitating portion is disposed on the turning mechanism.

[0008] The inlet / outlet mechanism can move the turning mechanism and the scraping and shaking part in multiple dimensions to accurately deliver the scraping and shaking part into the resin tank;

[0009] The turning mechanism is adapted to rotate the scraping and shaking part to change the direction of the scraping and shaking part;

[0010] The scraping and shaking section is adapted to move along the horizontal plane or inside the external photosensitive resin in the resin tank to scrape the surface or stir the internal part of the external photosensitive resin in the resin tank.

[0011] The sunken receiving part includes a sunken trough and an externally recessed container;

[0012] The recessed groove is formed on the 3D printer body and located on one side of the resin tank. The external recessed container is connected to the 3D printer body and aligned with the recessed groove.

[0013] Furthermore, the scraping and shaking part includes a bushing, a right half plate, a first spring, a first main plate, a scraper, a side plate, a first electric push rod, a bent transmission rod, a circular iron plate, a first bottom block, and a first electromagnet;

[0014] The bushing is mounted on the turning mechanism, the right half plate is mounted on one side of the bushing, a plurality of first springs are mounted on the right half plate with one end collinear, the first main plate is connected to the other end of the plurality of first springs, the two scraper strips are respectively mounted on the front and back sides of the first main plate, and both scraper strips are located at the bottom end of the first main plate, the side plate is connected to the turning mechanism, the first electric push rod is disposed on the side plate, the first bottom block is mounted on the top of the first main plate, the first electromagnet is disposed on the first bottom block, one end of the elbow transmission rod is connected to the output shaft of the first electric push rod, and the other end of the elbow transmission rod is connected to the circular iron plate;

[0015] The circular iron plate is in contact with the first electromagnet.

[0016] Furthermore, the scraping and shaking part also includes a left half plate, a second spring, a second main plate, a rotating plate, a bearing, a spindle, blades, a second bottom block, and a second electromagnet;

[0017] The left half plate is installed on the other side of the bushing, and a plurality of second springs are installed on the left half plate with one end collinearly. The second main plate is connected to the other end of the plurality of second springs. The rotating plate is perpendicularly connected to the second main plate. The bearing is set on the rotating plate. The spindle is installed on the bearing. A plurality of blades are circumferentially installed on the lower end of the spindle. The second base is installed on the top of the second main plate. The second electromagnet is set on the second base.

[0018] The first electromagnet and the second electromagnet are located at a pair of opposite vertices.

[0019] Furthermore, the turning mechanism includes an extended load plate, a positioning frame, and a motor;

[0020] The extended load plate is connected to the inlet / outlet mechanism, the positioning frame is disposed on the extended load plate, the motor is mounted upside down on the positioning frame, and the output shaft of the motor extends downward through the extended load plate;

[0021] The bushing is mounted on the output shaft of the motor and located below the extended load plate;

[0022] The side plate is connected to the side of the extended load plate.

[0023] Furthermore, the entry / exit mechanism includes a linear module, a support platform, a central vertical plate, a curved head positioning plate, a long strip base block, a clamping plate, a reinforcing corner plate, a through groove, a connecting piece, and a second electric push rod;

[0024] The linear module is disposed in the sunken trough and the external recessed container. The support platform is installed on the linear module. The central vertical plate is installed on the support platform. The curved head positioning plate is connected to the top of the central vertical plate. The elongated base block is disposed on the central vertical plate. The clamping plate is slidably installed on the elongated base block. The reinforcing corner plate is installed on the clamping plate. The through groove passes through the central vertical plate and the elongated base block in sequence. One end of the connector passes through the through groove and is connected to the clamping plate. The second electric push rod is inverted and installed on the curved head positioning plate.

[0025] The output shaft of the second electric push rod is connected to the other end of the connecting member;

[0026] The extended load plate is connected to the reinforced corner plate.

[0027] Furthermore, the scraping and shaking section also includes side guide plates installed on the front and rear sides of the first main body plate.

[0028] Furthermore, the scraping and shaking part also includes two sets of inner columns respectively inserted into the right half plate and the left half plate, and the two sets of inner columns are respectively close to the first main plate and the second main plate;

[0029] Several first springs and several second springs are respectively sleeved on two sets of inner cylinders.

[0030] Furthermore, the connecting component includes a direct component and a main rod;

[0031] The two direct members are connected to the clamping plate in a clamp-like shape, and the two direct members are connected together to the main rod body;

[0032] The main rod is connected to the output shaft of the second electric push rod.

[0033] Compared with the prior art, the present invention has the following beneficial effects:

[0034] The liquid leveling device of this laser 3D printer can scrape the surface of the remaining photosensitive resin in the resin tank after each layer is printed by the scraping and shaking part, thereby leveling the remaining photosensitive resin in the resin tank and promoting the rapid leveling of the liquid surface of the photosensitive resin after each layer is cured. This ensures that the photosensitive resin in each layer can be evenly distributed, guaranteeing a high degree of fusion between layers in subsequent printing and ensuring a smooth and flat product surface.

[0035] This laser 3D printer uses a liquid leveling device that agitates the photosensitive resin in the resin tank through a scraping and shaking section. This agitation causes the photosensitive resin to shake internally, effectively preventing the sedimentation effect of the photosensitive resin and avoiding precipitation or stratification. This ensures a uniform distribution of pigment particles in the photosensitive resin during printing, preventing inconsistent colors and guaranteeing uniform mixing of the internal components of the photosensitive resin throughout the printing process, thus ensuring consistent product quality.

[0036] The liquid leveling device for this laser 3D printer can quickly and accurately deliver the scraping and shaking part into the resin tank after each layer has cured through the inlet and outlet mechanism. This ensures efficiency while keeping the scraping and shaking part away from the resin tank, thereby effectively preventing any impact on the printing of the product and improving reliability.

[0037] The liquid leveling device used in this laser 3D printer is highly flexible and does not occupy the space inside the resin tank for a long time, thus ensuring that it does not affect the printing process and can improve the overall quality of the printed products. Attached Figure Description

[0038] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0039] Figure 1 A perspective view of the present invention is shown;

[0040] Figure 2 A first partial perspective view of the present invention is shown;

[0041] Figure 3 A second partial perspective view of the present invention is shown;

[0042] Figure 4 A partial perspective view of the invention in another configuration is shown;

[0043] Figure 5 A first partial perspective view of the invention is shown from another angle;

[0044] Figure 6 A second partial perspective view of the invention is shown from another angle;

[0045] Figure 7 This shows a partial bottom-view perspective view of the invention from another angle;

[0046] Figure 8 The present invention is shown. Figure 3 Enlarged view of point A.

[0047] In the figure, the same reference numerals represent the same structural element, wherein:

[0048] 1. 3D printer body; 2. Molding platform; 3. Resin tank; 4. Recessed receiving section; 41. Recessed groove; 42. External recessed container; 5. Infeed / outfeed mechanism; 51. Linear module; 52. Support platform; 53. Central vertical plate; 54. Curved head positioning plate; 55. Long strip base block; 56. Clamping plate; 57. Reinforcing corner plate; 58. Through groove; 59. Connecting component; 5911. Direct component; 592. Main rod; 591. Second electric push rod; 6. Turning mechanism; 61. Extended load plate; 62. Positioning frame; 63. Motor; 7. Scraper and agitator Part; 71. Bushing; 72. Right half plate; 73. First spring; 74. First main body plate; 75. Scraper; 76. Side connecting plate; 77. First electric push rod; 78. Elbow transmission rod; 79. Circular iron plate; 791. First base; 792. First electromagnet; 793. Left half plate; 794. Second spring; 795. Second main body plate; 796. Rotating plate; 797. Bearing; 798. Mandrel; 799. Blade; 7991. Second base; 7992. Second electromagnet; 7993. Side guide plate; 7994. Inner column. Detailed Implementation

[0049] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the invention, and therefore only show the components relevant to the invention.

[0050] Please see Figure 1 , Figure 1 A perspective view of the present invention is shown; please refer to [link / reference]. Figure 2 , Figure 2 A first partial perspective view of the present invention is shown; please refer to [link / reference]. Figure 3 , Figure 3 A second partial perspective view of the invention is shown; please refer to [link / reference]. Figure 4 , Figure 4 A partial perspective view of the invention in another configuration is shown; please refer to [link / reference]. Figure 5 , Figure 5 A first partial perspective view of the invention from another angle is shown; please refer to [link / reference]. Figure 6 , Figure 6 A second partial perspective view of the invention from another angle is shown; please refer to [link / reference]. Figure 7 , Figure 7 A partial bottom-view perspective view of the invention is shown from another angle; please refer to [link / reference]. Figure 8 , Figure 8 The present invention is shown. Figure 3 Enlarged view of point A; as shown Figure 1-8 As shown, a liquid leveling device for a laser 3D printer includes: a 3D printer body 1, a forming platform 2, a resin tank 3, a sinking receiving part 4, an inlet / outlet mechanism 5, a turning mechanism 6, and a scraping and shaking part 7.

[0051] The molding platform 2 and the resin tank 3 are both disposed within the 3D printer body 1, with the molding platform 2 positioned behind and aligned with the resin tank 3. The sinking receiving part 4 is disposed on the 3D printer body 1, the inlet / outlet mechanism 5 is disposed on the sinking receiving part 4, the turning mechanism 6 is disposed on the inlet / outlet mechanism 5, and the scraping and shaking part 7 is disposed on the turning mechanism 6.

[0052] The inlet / outlet mechanism 5 can move the turning mechanism 6 and the scraping and shaking part 7 in multiple dimensions to accurately feed the scraping and shaking part 7 into the resin tank 3;

[0053] The turning mechanism 6 is adapted to rotate the scraping and shaking part 7 to change the direction of the scraping and shaking part 7;

[0054] The scraping and agitating section 7 is adapted to move along the horizontal plane or inside the external photosensitive resin in the resin tank 3 to scrape the surface or agitate the internal surface of the external photosensitive resin in the resin tank 3. This laser 3D printer's liquid leveling device, through the scraping and agitating section 7, can scrape the surface of the remaining photosensitive resin in the resin tank 3 after each layer is printed, thereby leveling the remaining photosensitive resin in the resin tank 3. This promotes rapid leveling of the photosensitive resin surface after each layer solidifies, ensuring uniform distribution of the photosensitive resin in each layer. This guarantees high fusion between layers in subsequent printing, ensuring a smooth and flat product surface. The scraping and agitating section 7 also agitates the photosensitive resin in the resin tank 3, causing internal shaking, thus effectively preventing photosensitive... The resin's own sedimentation effect effectively prevents the photosensitive resin in the resin tank 3 from settling or stratifying, ensuring a uniform distribution of pigment particles in the photosensitive resin during printing, avoiding inconsistent colors, and guaranteeing uniform mixing of the internal components of the photosensitive resin throughout the printing process, ensuring consistent product quality. The inlet / outlet mechanism 5 can quickly and accurately deliver the scraper and agitator 7 into the resin tank 3 after each layer has cured, thus ensuring efficiency while keeping the scraper and agitator 7 away from the resin tank 3, effectively preventing any impact on the printing of the product and improving reliability. The liquid leveling device used in this laser 3D printer is highly flexible and does not occupy the space inside the resin tank 3 for a long time, thus ensuring that it does not affect the printing process and improving the overall quality of the printed product.

[0055] The sunken receiving part 4 includes a sunken groove 41 and an externally connected recessed container 42;

[0056] The recessed groove 41 is formed on the 3D printer body 1 and located on one side of the resin tank 3. The external recessed container 42 is connected to the 3D printer body 1 and aligned with the recessed groove 41, providing a recessed installation space for the inlet / outlet mechanism 5. This reduces the overall height of the liquid leveling device for the laser 3D printer relative to the resin tank 3, thereby ensuring that the scraping and shaking part 7 can penetrate deep into the resin tank 3 to scrape the surface of each layer of photosensitive resin until printing is finished or the photosensitive resin is exhausted.

[0057] Optionally, the scraping and shaking part 7 includes a bushing 71, a right half plate 72, a first spring 73, a first main body plate 74, a scraper 75, a side connecting plate 76, a first electric push rod 77, an elbow transmission rod 78, a circular iron plate 79, a first bottom block 791, and a first electromagnet 792.

[0058] The bushing 71 is mounted on the turning mechanism 6, the right half plate 72 is mounted on one side of the bushing 71, a plurality of first springs 73 are mounted on the right half plate 72 with one end collinear, the first main plate 74 is connected to the other end of the plurality of first springs 73, two scraper strips 75 are respectively mounted on the front and back sides of the first main plate 74, and both scraper strips 75 are located at the bottom end of the first main plate 74, the side plate 76 is connected to the turning mechanism 6, the first electric push rod 77 is disposed on the side plate 76, the first base 791 is mounted on the top of the first main plate 74, the first electromagnet 792 is disposed on the first base 791, one end of the elbow transmission rod 78 is connected to the output shaft of the first electric push rod 77, and the other end of the elbow transmission rod 78 is connected to the circular iron plate 79;

[0059] The circular iron plate 79 is in contact with the first electromagnet 792, ensuring that the energized first electromagnet 792 attracts the circular iron plate 79 at the end of the elbow drive rod 78. After the previous layer of curing and printing is completed and the molding platform 2 is raised, the inlet / outlet mechanism 5 is driven to gradually feed the scraping and shaking part 7 into the resin tank 3 until the first main body plate 74 is close to the inner wall of the resin tank 3 and the two scraper blades 75 are level with the horizontal surface of the photosensitive resin in the resin tank 3. Then, the first electric push rod 77 is driven to transmit the thrust to the first main body plate 74 through the elbow drive rod 78, the circular iron plate 79 and the first electromagnet 792, pushing the first main body plate 74 forward in the resin tank 3, while pulling open several first springs 73, thereby using the front scraper blades 75 to perform the first scraping on the surface of the photosensitive resin. The photosensitive resin above the horizontal plane is carried away and filled into the position below the horizontal plane during the pushing process. After the scraper 75 moves from the inner wall of this side to the inner wall of the opposite side of the resin tank 3, the first electric push rod 77 is driven in the reverse direction to pull back the first main body plate 74. This allows the scraper 75 on the reverse side to scrape the surface of the photosensitive resin again, ensuring that the photosensitive resin liquid surface of the current printing layer is quickly leveled under this back and forth scraping, ensuring the uniform distribution of the photosensitive resin of the current printing layer, and thus ensuring that the photosensitive resin is evenly applied to the molding platform 2 after the molding platform 2 enters the resin tank 3. During the process of the first electric push rod 77 pulling back the first main body plate 74, several first springs 73 rebound synchronously to pull back the first main body plate 74, ensuring that the first main body plate 74 moves back stably.

[0060] Optionally, the scraping and shaking part 7 further includes a left half plate 793, a second spring 794, a second main plate 795, a rotating plate 796, a bearing 797, a spindle 798, a blade 799, a second bottom block 7991, and a second electromagnet 7992.

[0061] The left half plate 793 is installed on the other side of the bushing 71. One end of several second springs 794 is coaxially installed on the left half plate 793. The second main plate 795 is connected to the other end of several second springs 794. The rotating plate 796 is perpendicularly connected to the second main plate 795. The bearing 797 is disposed on the rotating plate 796. The spindle 798 is installed on the bearing 797. Several blades 799 are circumferentially installed on the lower end of the spindle 798. The second base 7991 is installed on the top of the second main plate 795. The second electromagnet 7992 is disposed on the second base 7991.

[0062] The first electromagnet 792 and the second electromagnet 7992 are located at a pair of opposite vertices. After a period of continuous printing and the photosensitive resin in the resin tank 3 has been stationary for a period of time, the power supply to the first electromagnet 792 is disconnected, so that it no longer attracts the circular iron plate 79, causing the two to separate. Then, the rotating mechanism 6 is driven to rotate the bushing 71, so that the right half plate 72 and the left half plate 793 are reversed until the first main plate 74 and the second main plate 795 are swapped. At this time, the second electromagnet 7992 is in contact with the circular iron plate 79. Then, the second electromagnet 7992 is energized, so that it attracts the circular iron plate 79, establishing the connection between the first electric push rod 77 and the second main plate 795. Then, the scraping and shaking part 7 is sent into the resin tank 3 through the inlet and outlet mechanism 5, so that part of the mandrel 798 and several blades 79 9. The entire substrate is immersed in photosensitive resin. Then, the first electric push rod 77 is driven to push the second main body plate 795 forward, causing several blades 799 to move forward inside the photosensitive resin. During the forward movement, the blades 799 are resisted by the viscous photosensitive resin and, under the action of the bearing 797, rotate adaptively by the spindle 798, thereby stirring the photosensitive resin inside. This causes shaking inside the photosensitive resin, which stirs up particles that tend to settle, making them evenly mixed with other floating particles. This effectively prevents the photosensitive resin in the resin tank 3 from settling or stratifying, ensuring a uniform distribution of pigment particles in the photosensitive resin during printing and avoiding inconsistent colors. Timed shaking effectively prevents the settling effect of the photosensitive resin itself, thus comprehensively and effectively improving the printing effect of the model.

[0063] Optionally, the turning mechanism 6 includes an extended load plate 61, a positioning frame 62, and a motor 63;

[0064] The extended load plate 61 is connected to the inlet / outlet mechanism 5. The positioning frame 62 is disposed on the extended load plate 61. The motor 63 is inverted and mounted on the positioning frame 62, and the output shaft of the motor 63 extends downward through the extended load plate 61.

[0065] The bushing 71 is mounted on the output shaft of the motor 63 and is located below the extended load plate 61;

[0066] The side plate 76 is connected to the side of the extended load plate 61. Under normal conditions, the first main plate 74 is located in front and is used for scraping the surface of the photosensitive resin after layer-by-layer curing. When it is necessary to shake the inside of the photosensitive resin to prevent its own sedimentation effect, the drive motor 63 drives the bushing 71 until the first main plate 74 and the second main plate 795 are swapped to ensure flexibility and ensure that different operating modes of the scraping and shaking part 7 can be quickly selected according to specific circumstances.

[0067] Optionally, the entry / exit mechanism 5 includes a linear module 51, a support platform 52, a central vertical plate 53, a curved head positioning plate 54, a long strip base block 55, a clamping plate 56, a reinforcing corner plate 57, a through groove 58, a connecting piece 59, and a second electric push rod 591.

[0068] The linear module 51 is disposed in the recessed groove 41 and the external recessed container 42. The support platform 52 is mounted on the linear module 51. The central vertical plate 53 is mounted on the support platform 52. The curved head positioning plate 54 is connected to the top of the central vertical plate 53. The elongated base block 55 is disposed on the central vertical plate 53. The clamping plate 56 is slidably mounted on the elongated base block 55. The reinforcing angle plate 57 is mounted on the clamping plate 56. The through groove 58 passes through the central vertical plate 53 and the elongated base block 55 in sequence. One end of the connector 59 passes through the through groove 58 and is connected to the clamping plate 56. The second electric push rod 591 is inverted and mounted on the curved head positioning plate 54.

[0069] The output shaft of the second electric push rod 591 is connected to the other end of the connector 59;

[0070] The extended load plate 61 is connected to the reinforcing corner plate 57. Under normal conditions, both the linear module 51 and the second electric push rod 591 are in the reset state, keeping the scraping and shaking part 7 away from the resin tank 3. When it is necessary to scrape the surface of the photosensitive resin or stir the inside of the photosensitive resin to complete the curing and printing of a single layer, the linear module 51 is driven to move the support platform 52 forward in a straight line until the scraping and shaking part 7 is sent to a suitable position above the resin tank 3. Then, the second electric push rod 591 is driven to push the clamping plate 56 up and down along the through groove 58 on the long strip base block 55 through the connector 59 until the two scrapers 75 are aligned with the support plate 56. The photosensitive resin in the resin tank 3 is level with the horizontal surface, or several blades 799 are immersed in the photosensitive resin, so that when the scraping and shaking part 7 is needed, it is quickly delivered to the designated location, thus avoiding the scraping and shaking part 7 from affecting the model printing while ensuring the overall printing efficiency. In addition, by lowering two scraper blades 75 through the high-precision second electric push rod 591, it can be ensured that the two scraper blades 75 are lowered layer by layer according to the pre-allocated thickness of each layer, so that they always follow the descent of the photosensitive resin liquid surface to reach the horizontal surface of the photosensitive resin, thereby further ensuring the uniform thickness of the printed layers.

[0071] Optionally, the scraping and shaking part 7 further includes side guide plates 7993 installed on the front and rear sides of the first main body plate 74. When the front scraper 75 performs the first scraping of the photosensitive resin liquid surface, the side guide plates 7993 on both sides gradually guide the photosensitive resin pushed forward by the scraper 75 away from both sides, so as to avoid the photosensitive resin accumulating on the scraper 75 and prevent the scraping effect of the scraper 75 from being affected, and ensure that the photosensitive resin liquid surface is leveled quickly and successfully.

[0072] Optionally, the scraping and shaking part 7 further includes two sets of inner columns 7994 respectively inserted on the right half plate 72 and the left half plate 793, and the two sets of inner columns 7994 are respectively close to the first main plate 74 and the second main plate 795;

[0073] A plurality of first springs 73 and a plurality of second springs 794 are respectively sleeved on the two sets of inner columns 7994 to shape the plurality of first springs 73 and a plurality of second springs 794 and to prevent the plurality of first springs 73 and a plurality of second springs 794 from being unable to bear the weight of the components connected to them and from deforming and collapsing, which would cause the scraping and shaking part 7 to malfunction.

[0074] Optionally, the connector 59 includes a direct member 5911 and a main rod 592;

[0075] The two direct members 5911 are connected to the clamping plate 56 in a clamp-like shape, and the two direct members 5911 are connected to the main rod body 592 in a combined manner;

[0076] The main rod 592 is connected to the output shaft of the second electric push rod 591. By relying on the two direct members 5911, the thrust of the second electric push rod 591 is transmitted to the clamping plate 56 at multiple points to ensure that the clamping plate 56 can move stably. At the same time, the two direct members 5911 and the main rod 592 are used to pull the clamping plate 56 and give it a backward pulling force to prevent the clamping plate 56 from being forcibly separated from the long strip base block 55 due to long-term load scraping and shaking part 7, which would lead to an accident.

[0077] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A liquid surface leveler for a laser 3D printer, characterized by, The application relates to a 3D printer, which comprises a 3D printer body (1), a forming platform (2), a resin tank (3), a sinking accommodating part (4), an in-out mechanism (5), a rotating mechanism (6) and a scraping-shaking-stirring part (7). The forming platform (2) and the resin tank (3) are arranged in the 3D printer body (1), the forming platform (2) is located behind the resin tank (3) and is aligned with the resin tank (3), the sinking accommodating part (4) is arranged on the 3D printer body (1), the in-out mechanism (5) is arranged on the sinking accommodating part (4), the rotating mechanism (6) is arranged on the in-out mechanism (5), and the scraping-shaking-stirring part (7) is arranged on the rotating mechanism (6), wherein The in-out mechanism (5) is driven to move the rotating mechanism (6) and the scraping-shaking-stirring part (7) in multiple dimensions, so that the scraping-shaking-stirring part (7) can be accurately sent into the resin tank (3); The rotating mechanism (6) is suitable for rotating the scraping-shaking-stirring part (7) to change the direction of the scraping-shaking-stirring part (7); The scraping-shaking-stirring part (7) is suitable for moving along the horizontal plane of the external photosensitive resin in the resin tank (3) or moving inside, so as to scrape the surface of the external photosensitive resin in the resin tank (3) or stir the internal photosensitive resin; The sinking accommodating part (4) comprises a sinking groove (41) and an external sinking container (42); The sinking groove (41) is arranged on the 3D printer body (1) and located on one side of the resin tank (3), and the external sinking container (42) is connected to the 3D printer body (1) and aligned with the sinking groove (41); The scraping-shaking-stirring part (7) comprises a shaft sleeve (71), a right half plate (72), a first main plate (74), a scraping strip (75), a first electric push rod (77), a elbow transmission rod (78), a circular iron plate (79) and a first electromagnet (792). The shaft sleeve (71) is mounted on the rotating mechanism (6), the right half plate (72) is mounted on one side of the shaft sleeve (71), the circular iron plate (79) is attached to the first electromagnet (792), the first electromagnet (792) is electrified to adsorb the circular iron plate (79) at the end of the elbow transmission rod (78), then the first electric push rod (77) is driven to transmit the pushing force to the first main plate (74) through the elbow transmission rod (78), the circular iron plate (79) and the first electromagnet (792), and the front scraping strip (75) is used for scraping the surface of the photosensitive resin; The scraping-shaking-stirring part (7) further comprises a left half plate (793), a second main plate (795), a blade (799), a second bottom block (7991) and a second electromagnet (7992), and the left half plate (793) is mounted on the other side of the shaft sleeve (71). ​ The driving mechanism (6) rotates the shaft sleeve (71), so that the right half plate (72) and the left half plate (793) are turned, until the first main plate (74) and the second main plate (795) are completed, at this time the second electromagnet (7992) is attached to the circular iron plate (79), and then the second electromagnet (7992) is energized to attract the circular iron plate (79), establishing the connection between the first electric push rod (77) and the second main plate (795), and then driving the first electric push rod (77) to push the second main plate (795) forward, driving the plurality of blades (799) to move forward in the photosensitive resin.

2. The liquid surface flatness device for a laser 3D printer according to claim 1, characterized in that, The scraping and cutting stirring part (7) further comprises a first spring (73), a side connecting plate (76) and a first bottom block (791); The right half plate (72) is installed on one side of the shaft sleeve (71), a plurality of first springs (73) are installed on the right half plate (72) in a line, the first main plate (74) is connected to the other end of the plurality of first springs (73), two scraping strips (75) are installed on the front and back of the first main plate (74) respectively, and both of the two scraping strips (75) are located at the bottom end of the first main plate (74), the side connecting plate (76) is connected to the turning mechanism (6), the first electric push rod (77) is arranged on the side connecting plate (76), the first bottom block (791) is installed on the top of the first main plate (74), the first electromagnet (792) is arranged on the first bottom block (791), one end of the elbow transmission rod (78) is connected to the output shaft of the first electric push rod (77), and the other end of the elbow transmission rod (78) is connected to the circular iron plate (79).

3. The liquid surface flatness device for a laser 3D printer according to claim 2, characterized in that, The scraping and cutting stirring part (7) further comprises a second spring (794), a turning plate (796), a bearing (797) and a mandrel (798); A plurality of second springs (794) are installed on the left half plate (793) in a line, the second main plate (795) is connected to the other end of the plurality of second springs (794), the turning plate (796) is connected to the second main plate (795) perpendicularly, the bearing (797) is arranged on the turning plate (796), the mandrel (798) is installed on the bearing (797), and a plurality of blades (799) are installed on the lower end of the mandrel (798) in a circle, the second bottom block (7991) is installed on the top of the second main plate (795), and the second electromagnet (7992) is arranged on the second bottom block (7991); The first electromagnet (792) and the second electromagnet (7992) are located on a pair of opposite vertices.

4. The liquid surface flatness device for a laser 3D printer according to claim 3, characterized in that, The turning mechanism (6) comprises an overhanging load plate (61), a positioning frame (62) and a motor (63); The overhanging load plate (61) is connected with the in-out mechanism (5), the positioning frame (62) is arranged on the overhanging load plate (61), the motor (63) is installed upside down on the positioning frame (62), and the output shaft of the motor (63) extends downward through the overhanging load plate (61); The shaft sleeve (71) is installed on the output shaft of the motor (63) and located below the overhanging load plate (61); The side connecting plate (76) is connected to the side of the overhanging load plate (61). 5.The liquid surface flattening device for a laser 3D printer according to claim 4, wherein, The in-out mechanism (5) comprises a linear module (51), a bearing table (52), a central vertical plate (53), a curved head positioning plate (54), a long strip base block (55), a clamping plate (56), a reinforcing angle plate (57), a through slot (58), a connecting piece (59) and a second electric push rod (591); The linear module (51) is arranged in the sinking groove (41) and the outer connected concave container (42), the bearing table (52) is installed on the linear module (51), the central vertical plate (53) is installed on the bearing table (52), the curved head positioning plate (54) is connected to the top of the central vertical plate (53), the long strip base block (55) is arranged on the central vertical plate (53), the clamping plate (56) is slidingly installed on the long strip base block (55), the reinforcing angle plate (57) is installed on the clamping plate (56), the through slot (58) penetrates the central vertical plate (53) and the long strip base block (55) in sequence, one end of the connecting piece (59) passes through the through slot (58) and is connected with the clamping plate (56), and the second electric push rod (591) is installed upside down on the curved head positioning plate (54); The output shaft of the second electric push rod (591) is connected with the other end of the connecting piece (59); The overhanging load plate (61) is connected with the reinforcing angle plate (57). 6.The liquid surface flattening device for a laser 3D printer according to claim 5, wherein, The scraping and cutting shaking stirring part (7) further comprises side guide plates (7993) installed on the front and back of the first main plate (74). 7.The liquid surface flattening device for a laser 3D printer according to claim 6, wherein, The scraping and cutting shaking stirring part (7) further comprises two groups of inner column bodies (7994) respectively inserted into the right half plate (72) and the left half plate (793), and the two groups of inner column bodies (7994) are close to the first main plate (74) and the second main plate (795) respectively. The first springs (73) and the second springs (794) are sleeved on the two groups of inner column bodies (7994) respectively. 8.The liquid surface flattening device for a laser 3D printer according to claim 7, wherein, The adapter (59) comprises a direct piece (5911) and a main rod body (592); Two direct pieces (5911) are connected with the embracing plate (56) in a pincer shape, and two direct pieces (5911) are connected to the main rod body (592) in total; The main rod body (592) is connected with the output shaft of the second electric push rod (591).

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