A 3D printer based on SLA

Abstract

The present invention is a 3D printer based on SLA, belonging to the field of printer technology, and includes a shell, a molding cavity is provided inside the shell, and a first reflecting mechanism is provided in the middle of one side of the inner wall of the molding cavity. The horizontally placed reflector is arranged above the molding table and cannot be retracted, thereby hindering the inspection and installation of other structures in the molding cavity, and in the reflection process, the reflector absorbs part of the laser energy, causing the temperature of the reflector to rise, thereby causing the reflector to deform and lose, and the deformation will cause the mirror surface of the reflector to be uneven, thereby reducing the reflection accuracy of the reflector. In the present invention, through the coordinated use of the recovery groove and the substrate one, the substrate one and the transverse reflector can be recovered to the inner side of the shell, avoiding hindering the maintenance, inspection and installation of other structures in the molding cavity, and the servo electric cylinder controls the substrate one to swing through the connecting frame, so that the transverse reflector controls the change of the reflection angle of the laser.

Description

Technical Field

[0001] The invention belongs to the technical field of printers, and in particular relates to a 3D printer based on SLA. Background Art

[0002] SLA is a stereolithography method that uses a laser with a specific wavelength and intensity to focus on the surface of the photocurable material, solidifying it from point to line and from line to surface in sequence, completing a layer of drawing work, and then the lifting platform moves vertically to the height of a layer, and then solidifies another layer, so that layers are stacked to form a three-dimensional entity;

[0003] SLA is the earliest practical rapid prototyping technology, which uses liquid photosensitive resin as raw material. Its process is to first design a three-dimensional solid model through CAD, slice the model using discrete programs, design the scanning path, and the generated data will accurately control the movement of the laser scanner and the lifting platform; the laser beam passes through the scanner controlled by the CNC device and irradiates the surface of the liquid photosensitive resin according to the designed scanning path, so that a layer of resin in a specific area of ​​the surface is solidified. When a layer is processed, a cross section of the part is generated; then the lifting platform is lowered a certain distance, and another layer of liquid resin is covered on the solidified layer, and then the second layer is scanned. The second solidified layer is firmly bonded to the previous solidified layer. In this way, layers are stacked to form a three-dimensional workpiece prototype. After the prototype is taken out of the resin, it is solidified, polished, and then electroplated, painted or colored to obtain the required product;

[0004] SLA technology is mainly used to manufacture a variety of molds, models, etc.; by adding other ingredients to the raw materials, SLA prototype molds can be used to replace wax molds in investment casting. SLA technology has a faster forming speed and higher precision, but due to the shrinkage produced during the resin curing process, stress or deformation will inevitably be generated. Therefore, the development of photosensitive materials with small shrinkage, fast curing and high strength is its development trend.

[0005] In the existing SLA-based 3D printer, the horizontally placed reflector is set above the molding table and cannot be retracted, which will hinder the inspection and installation of other structures in the molding cavity. In the reflection process, the reflector will absorb part of the laser energy, causing the temperature of the reflector to rise, thereby causing the reflector to deform and lose. The deformation will cause the mirror surface of the reflector to be uneven, thereby reducing the reflection accuracy of the reflector. Therefore, a 3D printer based on SLA is proposed. Summary of the invention

[0006] The present invention provides a 3D printer based on SLA, which aims to solve the problem that a horizontally placed reflector is arranged above a molding table and cannot be retracted, thereby hindering the inspection and installation of other structures in the molding cavity, and during the reflection process, the reflector absorbs part of the laser energy, causing the temperature of the reflector to rise, thereby causing the reflector to deform and lose, and the deformation will cause the mirror surface of the reflector to be uneven, thereby reducing the reflection accuracy of the reflector.

[0007] The present invention provides a 3D printer based on SLA, comprising a shell, a molding cavity is provided inside the shell, a first reflection mechanism is provided in the middle of one side of the inner wall of the molding cavity, and a second reflection mechanism is provided at the top of the other side of the inner wall of the molding cavity;

[0008] A laser generator is disposed on one side of the top of the molding cavity, the laser generator corresponds to the first reflection mechanism, and the first reflection mechanism and the second reflection mechanism are connected to the same cooling assembly;

[0009] The first reflection mechanism comprises a second substrate and a stable seat, the second substrate is arranged on the top of the stable seat, a longitudinal reflector is arranged on the top of the second substrate, a second rotating shaft is inserted into the inner side of the stable seat, a servo motor is fixedly connected to the inner side of the shell, a power output end of the servo motor is fixedly connected to one end of the second rotating shaft, and the other end of the second rotating shaft is movably connected to the inner side of the shell;

[0010] A recovery groove is provided at the top of the other side of the inner wall of the molding cavity, and the second reflecting mechanism includes a substrate 1 and a transverse reflecting mirror. A rotating shaft 1 is provided at the bottom end of the substrate 1, and both ends of the rotating shaft 1 are rotatably connected to the inner side of the recovery groove. A transverse reflecting mirror is provided on one side of the substrate 1, and the outer side of the substrate 1 is variably connected to the inner side of the recovery groove.

[0011] Furthermore, the stabilizing seat is semi-cylindrical, a rolling groove is provided in the middle of one side of the inner wall of the forming cavity, the inner bottom wall of the rolling groove is in the shape of a semi-cylindrical circumferential surface, and the bottom of the stabilizing seat is slidably connected to the inner bottom wall of the rolling groove.

[0012] By adopting the above solution, the stabilizing seat and the rolling groove cooperate to make the angle change of the substrate 2 and the longitudinal reflector more stable.

[0013] Furthermore, the cooling component includes a circulating compressor, a fin tube radiator, connecting tube one, connecting tube two, connecting tube three and connecting tube four. A circulating compressor is arranged at the top of the shell, a fin tube radiator is arranged on one side of the shell, the radiator contains coolant, connecting tube three and connecting tube four are respectively arranged at both ends of the circulating compressor, the top of the fin tube radiator is fixedly connected to one end of connecting tube three, the bottom end of the fin tube radiator is arranged at the bottom end of the fin tube radiator, the bottom end of connecting tube one is fixedly connected to one end of substrate one, the other end of substrate one is arranged at connecting tube two, the bottom end of connecting tube four is fixedly connected to one end of substrate two, and the other end of the stabilizing seat is fixedly connected to the end of connecting tube two away from substrate one.

[0014] By adopting the above scheme, the cooling component can keep the temperature of the transverse reflector on substrate one and the longitudinal reflector on substrate two stable, reduce the deformation and loss of the transverse reflector and substrate two caused by excessive temperature, ensure the flatness of the reflector surface, and thus ensure the reflection accuracy of the reflector.

[0015] Furthermore, a movable cavity is opened on one side of the top of the recovery groove, one end of the inner wall of the movable cavity is hinged with a servo electric cylinder, the movable end of the servo electric cylinder is fixedly connected to a connecting frame, and one side of the connecting frame is hinged to one side of one end of the base plate.

[0016] By adopting the above scheme, the recovery groove allows the substrate 1 and the transverse reflector to be recovered to the inner side of the shell, avoiding obstruction of the maintenance, inspection and installation of other structures of the molding cavity. The servo electric cylinder controls the swing of the substrate 1 through the connecting frame, so that the transverse reflector controls the change of the reflection angle of the laser.

[0017] Furthermore, a mounting groove 1 is provided on one side of the substrate 1, a heat-conducting seat 1 is inserted into the inner side of the mounting groove 1, a heat-conducting groove is provided on one side of the heat-conducting seat 1, the material of the heat-conducting groove is copper, one side of the heat-conducting seat 1 is fixedly connected to one side of the transverse reflector, a square fixing frame is fixedly connected around the transverse reflector, one side of the square fixing frame is clamped with the inner side of the mounting groove 1, the shape of the heat-conducting groove is a regular tetrahedron, and the connecting tube 1 and the connecting tube 2 are both connected to the inner cavity of the heat-conducting groove.

[0018] By adopting the above solution, the cooling liquid reaches the inner side of the substrate 1 and then reaches the inner cavity of the heat conducting groove, and the heat of the transverse reflector is transferred to the cooling liquid through the heat conducting seat 1.

[0019] Furthermore, a mounting groove 2 is provided at the top of the substrate 2, a heat-conducting seat 2 is inserted into the inner side of the mounting groove 2, the material of the heat-conducting seat 2 is copper, a plurality of cooling grooves and matching grooves are alternately provided at the bottom of the heat-conducting seat 2, a plurality of partition plates are provided on the inner bottom wall of the mounting groove 2, the partition plates correspond to the matching grooves respectively, a sealing block is provided at the top of each partition plate, the material of the sealing block is rubber, the sealing block is variably connected to the corresponding matching groove, the mounting groove 2 is connected to the connecting pipe 2 and the connecting pipe 4, notches are alternately provided at both ends of the partition plate, so that the inner cavity of the mounting groove 2 is divided into an S-shaped channel.

[0020] By adopting the above scheme, the coolant passes through the S-shaped channel inside the second mounting groove, the coolant contacts one side of the second thermal conductive seat, the cooling groove increases the contact area between the coolant and the second thermal conductive seat, the heat of the longitudinal reflector is transferred to the second thermal conductive seat, and the second thermal conductive seat conducts the heat to the coolant.

[0021] Furthermore, two ends of the bottom of the longitudinal reflector are respectively provided with a fixing column, and the fixing column is plugged into the top of the second substrate.

[0022] By adopting the above solution, the fixing column facilitates the stable fixing of the longitudinal reflector on one side of the substrate 2.

[0023] Compared with the prior art, the above technical solution of the present invention has the following beneficial technical effects:

[0024] 1. In the present invention, the recovery groove and the substrate 1 are used in combination, so that the substrate 1 and the transverse reflector can be recovered to the inner side of the shell, avoiding obstruction of maintenance, repair and installation of other structures of the molding cavity. The servo electric cylinder controls the substrate 1 to swing through the connecting frame, so that the transverse reflector controls the change of the reflection angle of the laser;

[0025] 2. In the present invention, by using a cooling component, the temperature of the transverse reflector on substrate one and the longitudinal reflector on substrate two is kept stable, thereby reducing deformation and loss of the transverse reflector and substrate two caused by excessive temperature, ensuring the flatness of the reflector surface, and thus ensuring the reflection accuracy of the reflector.

[0026] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0028] Figure 1 It is a front structural schematic diagram of the present invention;

[0029] Figure 2 It is a schematic diagram of the front structure of the substrate 1 of the present invention;

[0030] Figure 3 It is a structural schematic diagram of the connection relationship between the substrate 2 and the servo motor of the present invention;

[0031] Figure 4 It is a schematic diagram of the cross-sectional structure of the second front side of the substrate of the present invention;

[0032] Figure 5 For the present invention Figure 1 A schematic diagram of the partially enlarged structure of part A;

[0033] Figure 6 For the present invention Figure 1 A schematic diagram of the local enlarged structure of part B;

[0034] Figure 7 It is a schematic diagram of the cooling assembly structure of the present invention.

[0035] Figure numerals: 1. shell; 2. laser generator; 3. molding cavity; 4. circulating compressor; 5. active cavity; 6. servo electric cylinder; 7. fin tube radiator; 8. substrate one; 9. rotating shaft one; 10. transverse reflector; 11. square fixing frame; 12. connecting frame; 13. rotating shaft two; 14. substrate two; 15. mounting groove two; 16. longitudinal reflector; 17. thermal conductive seat two; 18. cooling groove; 19. matching groove; 20. fixing column; 21. servo motor; 22. dividing plate; 23. sealing block; 24; 25. mounting groove one; 26. thermal conductive seat one; 27. thermal conductive groove; 28. rolling groove; 29. ​​connecting pipe one; 30. connecting pipe two; 31. connecting pipe three; 32. connecting pipe four; 33. recovery groove; 34. stabilizing seat. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solution and advantages of the technical solution of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described in conjunction with the drawings of specific embodiments of the present invention. The same figure marks in the drawings represent the same parts. It should be noted that the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] like Figure 1-7As shown, the present invention proposes a 3D printer based on SLA, comprising a housing 1, a molding cavity 3 is provided inside the housing 1, a first reflection mechanism is provided in the middle of one side of the inner wall of the molding cavity 3, and a second reflection mechanism is provided at the top of the other side of the inner wall of the molding cavity 3;

[0038] A laser generator 2 is disposed on one side of the top of the molding cavity 3, and the laser generator 2 corresponds to the first reflection mechanism, and the first reflection mechanism and the second reflection mechanism are connected to the same cooling component;

[0039] The first reflection mechanism includes a second substrate 14 and a stable seat 34, the second substrate 14 is arranged on the top of the stable seat 34, the top of the second substrate 14 is provided with a longitudinal reflector 16, the inner side of the stable seat 34 is plugged with a second rotating shaft 13, the inner side of the housing 1 is fixedly connected with a servo motor 21, the power output end of the servo motor 21 is fixedly connected to one end of the second rotating shaft 13, and the other end of the second rotating shaft 13 is movably connected to the inner side of the housing 1;

[0040] A recovery groove 33 is provided at the top of the other side of the inner wall of the molding cavity 3, and the second reflecting mechanism includes a substrate 8 and a transverse reflecting mirror 10. A rotating shaft 9 is provided at the bottom end of the substrate 8, and both ends of the rotating shaft 9 are rotatably connected to the inner side of the recovery groove 33. A transverse reflecting mirror 10 is provided on one side of the substrate 8, and the outer side of the substrate 8 is movably connected to the inner side of the recovery groove 33.

[0041] The stabilizing seat 34 is semi-cylindrical, and a rolling groove 28 is provided in the middle of one side of the inner wall of the molding cavity 3. The inner bottom wall of the rolling groove 28 is in the shape of a semi-cylindrical circumferential surface, and the bottom of the stabilizing seat 34 is slidably connected to the inner bottom wall of the rolling groove 28.

[0042] The stabilizing seat 34 cooperates with the rolling groove 28 to make the angle change of the substrate 2 14 and the longitudinal reflector 16 more stable.

[0043] The cooling assembly includes a circulation compressor 4, a fin tube radiator 7, a connecting pipe 1 29, a connecting pipe 2 30, a connecting pipe 3 31 and a connecting pipe 4 32. The top of the shell 1 is provided with a circulation compressor 4, and the side of the shell 1 is provided with a fin tube radiator 7. The radiator 7 contains a coolant, and the coolant includes alcohol, glycerin and ethylene glycol. The two ends of the circulation compressor 4 are respectively provided with a connecting pipe 3 31 and a connecting pipe 4 32. The top of the fin tube radiator 7 is fixedly connected to one end of the connecting pipe 3 31, and the bottom end of the fin tube radiator 7 is provided with a connecting pipe 1 29. The bottom end of the connecting pipe 1 29 is fixedly connected to one end of a base plate 1 8. The other end of the base plate 1 8 is provided with a connecting pipe 2 30. The bottom end of the connecting pipe 4 32 is fixedly connected to one end of the base plate 2 14, and the other end of the stabilizing seat 34 is fixedly connected to the end of the connecting pipe 2 30 away from the base plate 1 8.

[0044] The cooling assembly keeps the temperature of the transverse reflector 10 on the substrate 1 8 and the longitudinal reflector 16 on the substrate 2 14 stable, reduces deformation and loss of the transverse reflector 10 and the substrate 2 14 caused by excessive temperature, ensures the flatness of the reflector surface, and thus ensures the reflection accuracy of the reflector.

[0045] A movable cavity 5 is provided on one side of the top of the recovery tank 33, and a servo electric cylinder 6 is hingedly connected to one end of the inner wall of the movable cavity 5. A connecting frame 12 is fixedly connected to the movable end of the servo electric cylinder 6, and one side of the connecting frame 12 is hingedly connected to one side of one end of the base plate 8;

[0046] The recovery groove 33 allows the substrate 8 and the transverse reflector 10 to be recovered to the inner side of the shell 1 to avoid obstructing the maintenance, inspection and installation of other structures of the molding cavity. The servo cylinder 6 controls the swing of the substrate 8 through the connecting frame 12, so that the transverse reflector 10 controls the change of the reflection angle of the laser.

[0047] A mounting groove 25 is provided on one side of the substrate 8, a heat-conducting seat 26 is inserted into the inner side of the mounting groove 25, a heat-conducting groove 27 is provided on one side of the heat-conducting seat 26, and the material of the heat-conducting groove 27 is copper. One side of the heat-conducting seat 26 is fixedly connected to one side of the transverse reflector 10, and the transverse reflector 10 is fixedly connected with a square fixing frame 11 on all sides, and one side of the square fixing frame 11 is clamped with the inner side of the mounting groove 25, and the shape of the heat-conducting groove 27 is a regular quadrangular pyramid, and the connecting pipe 1 29 and the connecting pipe 2 30 are both connected to the inner cavity of the heat-conducting groove 27;

[0048] After reaching the inner side of the substrate 1 8 , the coolant will reach the inner cavity of the heat conducting groove 27 , and the heat of the transverse reflector 10 will be transferred to the coolant through the heat conducting seat 1 26 .

[0049] The top of the base plate 14 is provided with a mounting groove 15, and the inner side of the mounting groove 15 is plugged with a heat-conducting seat 17, and the material of the heat-conducting seat 17 is copper. The bottom of the heat-conducting seat 17 is alternately provided with a plurality of cooling grooves 18 and matching grooves 19, and the inner bottom wall of the mounting groove 15 is provided with a plurality of dividing plates 22, and the dividing plates 22 correspond to the matching grooves 19 respectively, and the top of each dividing plate 22 is provided with a sealing block 23, and the material of the sealing block 23 is rubber, and the sealing block 23 is variably connected to the corresponding matching groove 19, and the mounting groove 15 is connected with the connecting pipe 30 and the connecting pipe 4 32, and the two ends of the dividing plate 22 are alternately provided with notches, so that the inner cavity of the mounting groove 15 is divided into an S-shaped channel;

[0050] The coolant passes through the S-shaped channel inside the second mounting groove 15, and contacts one side of the second heat-conducting seat 17. The cooling groove 18 increases the contact area between the coolant and the second heat-conducting seat 17. The heat of the longitudinal reflector 16 is transferred to the second heat-conducting seat 17, and the second heat-conducting seat 17 transfers the heat to the coolant, so that the longitudinal reflector 16 is cooled, thereby keeping the temperature of the longitudinal reflector 16 stable.

[0051] A fixing column 20 is respectively disposed at both ends of the bottom of the longitudinal reflector 16, and the fixing column 20 is plugged into the top of the second substrate 14;

[0052] The fixing post 20 facilitates the longitudinal reflector 16 to be stably fixed on one side of the second substrate 14 .

[0053] The specific implementation method is as follows: the laser emitted by the laser generator 2 hits the top of the longitudinal reflector 16, and is reflected by the longitudinal reflector 16 so that the laser emitted by the laser generator 2 reaches the outside of the transverse reflector 10, and the transverse reflector 10 makes the laser hit the bottom of the molding cavity 3;

[0054] The servo motor 21 controls the rotation of the adjustment substrate 2 14 through the rotation shaft 2 13, adjusts the angle of the substrate 2 14, thereby adjusting the angle of the longitudinal reflector 16, thereby adjusting the position of the laser on the side of the transverse reflector 10 in the vertical direction, thereby changing the longitudinal position of the laser on the bottom of the molding cavity 3, and the servo electric cylinder 6 drives the substrate 1 8 to swing around the center of the rotation shaft 1 9 through the connecting frame 12, thereby changing the angle between the transverse reflector 10 and the inner wall of the recovery tank 33, and changing the transverse position of the laser on the bottom of the molding cavity 3;

[0055] The circulating compressor 4 is running, so that the coolant reaches the inner side of the stabilizing seat 34 through the connecting pipe 4 32. The coolant in the stabilizing seat 34 cools the longitudinal reflector 16, so that the temperature of the longitudinal reflector 16 is kept stable, thereby reducing the deformation of the longitudinal reflector 16. The coolant in the substrate 2 14 reaches the inner side of the substrate 1 8 through the connecting pipe 2 30, so that the transverse reflector 10 is cooled, so that the temperature of the transverse reflector 10 is kept stable, thereby reducing the deformation of the transverse reflector 10.

[0056] The coolant on the inner side of the substrate 8 reaches the inner side of the fin tube radiator 7 through the connecting pipe 29, the coolant loses heat through the fin tube radiator 7, the coolant is cooled by the fin tube radiator 7, and the coolant inside the fin tube radiator 7 returns to the fin tube radiator 7 through the connecting pipe 3 31;

[0057] The coolant passes through the S-shaped channel inside the second mounting groove 15, and the coolant contacts one side of the second heat-conducting seat 17. The cooling groove 18 increases the contact area between the coolant and the second heat-conducting seat 17. The heat of the longitudinal reflector 16 is transferred to the second heat-conducting seat 17, and the second heat-conducting seat 17 conducts the heat to the coolant.

[0058] The coolant reduces deformation and loss of the transverse reflector 10 and the longitudinal reflector 16 caused by excessive temperature, thereby ensuring the flatness of the reflector surface and thus ensuring the reflection accuracy of the reflector.

[0059] The above shows and describes the basic principles and main features of the present invention and the advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A 3D printer based on SLA, comprising a housing (1), characterized in that: A molding cavity (3) is provided inside the shell (1), a first reflection mechanism is provided in the middle of one side of the inner wall of the molding cavity (3), and a second reflection mechanism is provided at the top of the other side of the inner wall of the molding cavity (3); A laser generator (2) is arranged on one side of the top of the molding cavity (3), the laser generator (2) corresponds to the first reflection mechanism, and the first reflection mechanism and the second reflection mechanism are connected to the same cooling component; The first reflection mechanism comprises a second substrate (14) and a stabilizing seat (34), the second substrate (14) being arranged on the top of the stabilizing seat (34), a longitudinal reflection mirror (16) being arranged on the top of the second substrate (14), a second rotating shaft (13) being inserted into the inner side of the stabilizing seat (34), a servo motor (21) being fixedly connected to the inner side of the housing (1), and a power output end of the servo motor (21) being fixedly connected to one end of the second rotating shaft (13); A recovery groove (33) is provided at the top of the other side of the inner wall of the molding cavity (3); the second reflection mechanism comprises a substrate (8) and a transverse reflection mirror (10); a rotating shaft (9) is provided at the bottom end of the substrate (8); both ends of the rotating shaft (9) are rotatably connected to the inner side of the recovery groove (33); a mounting groove (25) is provided on one side of the substrate (8); a heat conducting seat (26) is inserted into the inner side of the mounting groove (25); a heat conducting groove (27) is provided on one side of the heat conducting seat (26); a transverse reflection mirror (10) is fixedly connected to the other side of the heat conducting seat (26); and the outer side of the substrate (8) is variably connected to the inner side of the recovery groove (33); The cooling assembly comprises a circulation compressor (4), a fin tube radiator (7), a connecting pipe 1 (29), a connecting pipe 2 (30), a connecting pipe 3 (31) and a connecting pipe 4 (32); the top of the shell (1) is provided with the circulation compressor (4); one side of the shell (1) is provided with the fin tube radiator (7); the two ends of the circulation compressor (4) are respectively provided with the connecting pipe 3 (31) and the connecting pipe 4 (32); the top of the fin tube radiator (7) is fixedly connected to one end of the connecting pipe 3 (31); the bottom end of the fin tube radiator (7) is provided with the connecting pipe 1 (29); the bottom end of the connecting pipe 1 (29) is fixedly connected to one end of the base plate 1 (8); the other end of the base plate 1 (8) is provided with the connecting pipe 2 (30); the bottom end of the connecting pipe 4 (32) is fixedly connected to one end of the base plate 2 (14); the other end of the stabilizing seat (34) is fixedly connected to one end of the connecting pipe 2 (30) away from the base plate 1 (8); The connecting pipe 1 (29) and the connecting pipe 2 (30) are both connected to the inner cavity of the heat conduction groove (27); the top of the base plate 2 (14) is provided with a mounting groove 2 (15); the inner side of the mounting groove 2 (15) is plugged with a heat conduction seat 2 (17); the mounting groove 2 (15) is connected to the connecting pipe 2 (30) and the connecting pipe 4 (32).

2. A 3D printer based on SLA according to claim 1, characterized in that: The stabilizing seat (34) is semi-cylindrical, a rolling groove (28) is provided in the middle of one side of the inner wall of the molding cavity (3), the inner bottom wall of the rolling groove (28) is in the shape of a semi-cylindrical circumferential surface, and the bottom of the stabilizing seat (34) is slidably connected to the inner bottom wall of the rolling groove (28).

3. The SLA-based 3D printer according to claim 1, characterized in that: A movable cavity (5) is provided on one side of the top of the recovery groove (33); a servo electric cylinder (6) is hingedly connected to one end of the inner wall of the movable cavity (5); a connecting frame (12) is fixedly connected to the movable end of the servo electric cylinder (6); and one side of the connecting frame (12) is hingedly connected to one side of one end of the base plate (8).

4. The SLA-based 3D printer according to claim 3, characterized in that: The material of the heat-conducting groove (27) is copper, one side of the heat-conducting seat (26) is fixedly connected to one side of the transverse reflector (10), the four sides of the transverse reflector (10) are fixedly connected to a square fixing frame (11), one side of the square fixing frame (11) is clamped to the inner side of the mounting groove (25), and the shape of the heat-conducting groove (27) is a regular quadrangular pyramid.

5. The SLA-based 3D printer according to claim 4, characterized in that: The material of the second heat-conducting seat (17) is copper. The bottom of the second heat-conducting seat (17) is alternately provided with a plurality of cooling grooves (18) and matching grooves (19). The inner bottom wall of the second installation groove (15) is provided with a plurality of partition plates (22). The partition plates (22) correspond to the matching grooves (19) respectively. A sealing block (23) is provided at the top end of each partition plate (22). The material of the sealing block (23) is rubber. The sealing block (23) is flexibly connected to the corresponding matching groove (19). Notches are alternately provided at the two ends of the partition plate (22), so that the inner cavity of the second installation groove (15) is divided into an S-shaped channel.

6. The SLA-based 3D printer according to claim 5, characterized in that: A fixing column (20) is respectively provided at both ends of the bottom of the longitudinal reflector (16), and the fixing column (20) is plugged into the top of the second base plate (14).

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