A light-curing 3D printer and leveling method thereof

Abstract

The present invention provides a photocuring 3D printer and a leveling method thereof, belonging to the technical field of 3D printing. It solves the problems of inconvenient disassembly and assembly of the existing molding platform and tilt of the molding platform. The present invention includes a leveling device, which is used to adjust the horizontality of the molding platform. The molding platform is arranged on a lifting drive mechanism through a mounting frame, and the molding platform is movably sleeved on the bottom of the mounting frame. A locking structure fixes the molding platform on the mounting frame. The leveling device includes a leveling base plate, which is detachably arranged on the frame. The lifting drive mechanism drives the molding platform to descend, and the lower bottom surface of the molding platform is attached to the upper surface of the leveling base plate. A locking mechanism locks the molding platform on the leveling base plate, so that the lower bottom surface of the molding platform and the upper surface of the leveling base plate remain in a state of attachment. The advantages of the present invention are that the molding platform is detachable, a pressure sensor is arranged between the resin pool and the table plate, and the leveling method is simple and convenient.

Description

Technical Field

[0001] The invention belongs to the technical field of 3D printing and relates to a light-curing 3D printer and a leveling method thereof. Background Art

[0002] The light-curing 3D printer uses ultraviolet light or other light sources in a specific wavelength range to irradiate liquid photosensitive resin and trigger a photochemical reaction, so that the photosensitive resin in the area irradiated by the light source is solidified from the liquid state, and the object to be formed can be obtained after curing layer by layer. The structure of a light-curing 3D printer generally includes a molding platform, a resin pool, an imaging glass, a light source, etc. The light source passes through the imaging glass to form a transmission area to be cured at the bottom of the resin pool, and the liquid resin located between the molding surface of the molding platform or the bottom of the cured layer and the bottom of the resin pool is cured in the transmission area.

[0003] At the beginning of printing, the molding platform is lowered to the bottom of the resin pool. The bottom of the resin pool is a transparent bottom film. The bottom of the molding platform is almost in contact with the bottom film, leaving a distance for setting the layer thickness (usually 0.025mm-0.1mm). Then the light source transmits a part of the light, which is projected onto the resin between the bottom of the molding platform and the resin pool film. After being excited by light, the photosensitive resin undergoes a polymerization reaction and transforms from liquid to solid. When the molding platform is lifted upward, the solidified resin will separate from the resin pool film, thus forming the first layer of the printed body. While the molding platform rises, the surrounding resin will diffuse to the first layer exposure area, and the resin will fill the area again to prepare for the next layer of printing. Next, the molding platform is lowered to a position one layer thickness higher than before, and the light source projects the light required for the second layer of printing. The resin between the first layer of the printed body and the resin pool film solidifies to form the second layer of the printed body. This process is repeated many times until the printing process is completed.

[0004] Traditional light-curing 3D printers have the following disadvantages:

[0005] 1. In the traditional mode, after each layer is printed, the build platform will rise by more than 3mm, and then descend to a position one layer thickness higher than the previous layer. During the descent, it is impossible to detect whether there are any residual solid foreign matter in the resin pool, or the descent value is deviated, which causes the build platform to descend during printing, pressing tightly on the foreign matter and the resin pool, causing excessive pressure on the resin pool, thereby damaging the print body and the resin pool.

[0006] 2. The molding platform of the traditional light-curing 3D printer is fixed on the lifting drive mechanism, which is used to drive the molding platform to rise and fall. The traditional molding platform is connected to the slider on the lifting drive mechanism through a connector, generally connected by fasteners and handles. This connection method is not only time-consuming to disassemble and assemble, but also very inconvenient to repair or disassemble and clean the molding platform. In addition, the molding platform is prone to loosening during long-term lifting and lowering, causing the platform to tilt;

[0007] 3. The levelness of the molding platform plays a vital role in the accuracy of printed parts. The installation error of the molding platform or the looseness that is easy to occur during the long-term lifting movement will cause the platform to tilt. When the working platform is tilted, it will cause the movement error of the 3D printer scanning mechanism, and then cause problems such as the shape error, position error, layer slippage, and increased roughness of the printed model. Summary of the invention

[0008] The first purpose of the present invention is to address the above-mentioned problems existing in existing light-curing 3D printers and to propose a light-curing 3D printer that can detect changes in resin pool pressure, facilitate assembly and disassembly of the molding platform, and adjust the levelness of the molding platform.

[0009] The first object of the present invention can be achieved by the following technical solutions:

[0010] A photocuring 3D printer comprises a frame and a resin pool, a molding platform, a lifting drive mechanism and a light source arranged on the frame, wherein the molding platform is arranged above the resin pool, the light source is arranged below the resin pool, and the lifting drive mechanism drives the molding platform to rise and fall in the resin pool. The printer further comprises a leveling device, which is used to adjust the horizontality of the molding platform. The molding platform is arranged on the lifting drive mechanism through a mounting frame, the molding platform is movably sleeved on the bottom of the mounting frame, a locking structure fixes the molding platform to the mounting frame, the leveling device comprises a leveling base plate, the leveling base plate is detachably arranged on the frame, the lifting drive mechanism drives the molding platform to descend, and the lower bottom surface of the molding platform is attached to the upper surface of the leveling base plate, and a locking mechanism locks the molding platform to the leveling base plate, so that the lower bottom surface of the molding platform and the upper surface of the leveling base plate remain in a state of attachment.

[0011] In the above-mentioned photocuring 3D printer, the molding platform is arranged on the lifting drive mechanism through a detachable structure, and the detachable structure includes a fixed block, which is fixedly connected to the slider of the lifting drive mechanism through a connecting piece. The molding platform is horizontally slidably arranged on the fixed block through a mounting frame, and a magnetic switch is rotatably arranged in the fixed block. By rotating the magnetic switch, the fixed block and the mounting frame can be magnetized, adsorbed and fixed.

[0012] In the above-mentioned light-curing 3D printer, the magnetic switch includes a magnet, a magnetic conductive block, and a magnetic conductive plate. The magnetic conductive block and the magnetic conductive plate can be magnetized by the magnet. The magnetic conductive block is fixedly connected to the fixed block, and the magnetic conductive plate is fixedly connected to the mounting frame. The magnetic conductive plate cover is arranged on the upper end surface of the magnetic conductive block. A magnetic isolation plate is arranged in the inner cavity of the magnetic conductive block, and the magnetic isolation plate separates the magnetic conductive block into two left and right parts. The magnet is rotatably arranged on the magnetic isolation plate through a rotating device. The rotating device can drive the magnet to rotate so that the magnetic conductive plate and the magnetic conductive block can be magnetized, adsorbed and fixed.

[0013] In the above-mentioned light-curing 3D printer, the cross-sectional shape of the mounting frame is an inverted U-shape, the fixed block is provided with two left-right symmetrical guiding inclined surfaces, and the two inner side surfaces of the mounting frame are provided with matching surfaces corresponding to the guiding inclined surfaces. The mounting frame is pressed downwardly on the fixed block so that the two guiding inclined surfaces fit with the corresponding matching surfaces to form left and right limit positions.

[0014] In the above-mentioned photocuring 3D printer, the cross-sectional shape of the magnetic conductive plate is an inverted U-shape, the magnetic conductive plate is fixedly arranged on the inner top surface of the mounting frame, the fixed block is clamped at the U-shaped opening of the magnetic conductive plate, the U-shaped opening size of the magnetic conductive plate is adapted to the outer size of the above-mentioned magnetic conductive block, the forming platform is pushed into the fixed block through the mounting frame, and the magnetic conductive plate can be pushed to abut against the inner side surface of the fixed block, so that the position of the forming platform corresponds to the position of the resin pool.

[0015] In the above-mentioned light-curing 3D printer, the lifting drive mechanism includes a linear module.

[0016] In the above-mentioned light-curing 3D printer, the rotating device includes a handle, and the handle is fixedly connected to the magnet.

[0017] In the above-mentioned light-curing 3D printer, a pressure detection device is also provided on the frame, and the resin pool is arranged on the pressure detection device. The pressure detection device includes a mounting plate and a pressure sensor. Several pressure sensors are fixedly arranged on the mounting plate, and the mounting plate is fixedly arranged on the frame. The detection end of the pressure sensor is vertically facing upward, and the gravity of the resin pool is applied to the detection end of the pressure sensor.

[0018] In the above-mentioned light-curing 3D printer, a table is fixedly provided on the frame, a mounting groove is provided on the upper surface of the table, the mounting plate is embedded in the mounting groove, and the shape of the mounting plate matches the shape of the mounting groove.

[0019] In the above-mentioned light-curing 3D printer, four pressure sensors are evenly distributed at four corners of the rectangular mounting plate.

[0020] In the above-mentioned light-curing 3D printer, a pad is further provided between the pressure sensor and the resin pool, and the resin pool is detachably arranged on the pad.

[0021] In the above-mentioned light-curing 3D printer, the locking mechanism includes a pressure block, and the leveling base plate is detachably arranged on the above-mentioned pad, and two pressure blocks are symmetrically arranged on the leveling base plate. A limit slot is opened on the pressure block, and the limit slots of the two pressure blocks are oriented oppositely. The left and right ends of the above-mentioned forming platform are respectively clamped in the two limit slots, and the two pressure blocks are detachably connected to the leveling base plate.

[0022] In the above-mentioned light-curing 3D printer, the limit slot is set along the length direction of the pressing block, the cross-sectional shape of the limit slot is a right-angled trapezoid, the shape of the lower half of the forming platform is two right-angled trapezoids that are symmetrical on the left and right, and the sizes of the left and right ends of the forming platform are adapted to the sizes of the two limit slots.

[0023] In the above-mentioned light-curing 3D printer, the molding platform is provided with a plurality of vertically arranged adjustment slots, and the mounting frame is provided with a plurality of mounting screw holes corresponding to the adjustment slots one by one.

[0024] The second objective of the present invention is to propose a method for adjusting the levelness of a molding platform in view of the above-mentioned problems existing in the existing light-curing 3D printers.

[0025] The second object of the present invention can be achieved by the following technical solutions:

[0026] A method for leveling a light-curing 3D printer, using the light-curing 3D printer for leveling, is characterized in that it comprises the following steps:

[0027] 1. Remove the resin pool from the pad;

[0028] 2. Loosen the fasteners on the adjustment slot of the forming platform;

[0029] 3. Fix the leveling base plate to the pad with fasteners;

[0030] 4. The lifting drive mechanism drives the molding platform down, so that the molding platform and the leveling bottom plate fit naturally;

[0031] 5. Fix the two pressing blocks on the leveling bottom plate through fasteners, so that the left and right ends of the forming platform are respectively embedded in the two limit slots, and the forming platform is pressed tightly on the leveling bottom plate;

[0032] 6. Tighten the fasteners on the adjustment slot of the forming platform;

[0033] 7. Remove the two pressure blocks, drive the forming platform to lift, and remove the leveling base plate.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. The molding platform is slidably mounted on the fixed block through the mounting frame. Due to the existence of the magnetic isolation plate, when the magnet is in a vertical state, the magnetic plate and the magnetic block cannot be magnetized. During installation, the mounting frame is horizontally pushed into the fixed block to form positioning in the front and back and left and right directions; the magnet is rotated to a horizontal state so that the magnetic plate and the magnetic block can be magnetized by the magnet, and the magnetic plate and the magnetic block are adsorbed and fixed, thereby fixing the mounting frame on the fixed block; the overall disassembly and assembly of the molding platform is more convenient, quick, time-saving and labor-saving;

[0036] 2. A pressure sensor is installed between the resin pool and the platen so that the gravity of the resin pool is applied to the detection end of the pressure sensor. During the printing process, the pressure sensor is used to detect whether there is overpressure in real time. Once there is overpressure, the machine will be stopped immediately to avoid damaging the print body and the resin pool;

[0037] 3. The traditional leveling method is to place the molding platform on a horizontal plane and then lock the molding platform. However, when one of the fasteners is locked, the lower bottom surface of the molding platform will warp. Therefore, the present invention first connects the leveling base plate with the pad, and then uses a pressing block to press the lower bottom surface of the molding platform onto the leveling base plate, and then connects the molding platform with the mounting frame to ensure the levelness of the lower bottom surface of the molding platform. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0039] Figure 2 is a cross-sectional view of the detachable structure of the present invention;

[0040] Figure 3 is a magnetic force line distribution diagram when the magnetic switch of the present invention is closed;

[0041] Figure 4 is a magnetic force line distribution diagram when the magnetic switch of the present invention is turned on;

[0042] Figure 5 is a schematic structural diagram of a pressure detection device of the present invention;

[0043] Figure 6 It is a schematic structural diagram of the leveling device of the present invention.

[0044] In the figure, 1. forming platform; 2. mounting frame; 3. fixing block; 4. magnet; 5. magnetic conductive block; 6. magnetic conductive plate; 7. magnetic isolation plate; 8. guide slope; 9. linear module; 10. mounting plate; 11. pressure sensor; 12. table; 13. pad; 14. leveling base plate; 15. pressing block; 16. limit slot; 17. adjustment slot; 18. connecting piece. DETAILED DESCRIPTION

[0045] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0046] like Figure 1 As shown, a photocuring 3D printer described in the present invention includes a frame and a resin pool, a molding platform 1, a lifting drive mechanism, and a light source arranged on the frame. The molding platform 1 is arranged above the resin pool, and the light source is arranged below the resin pool. The lifting drive mechanism drives the molding platform 1 to rise and fall in the resin pool, and the lifting drive mechanism includes a linear module 9.

[0047] like Figure 6 As shown, the printer also includes a leveling device, which is used to adjust the horizontality of the molding platform 1. The molding platform 1 is set on the lifting drive mechanism through a mounting frame 2. The molding platform 1 is movably sleeved on the bottom of the mounting frame 2. The molding platform 1 is provided with a plurality of vertically arranged adjustment slots 17, and the mounting frame 2 is provided with a plurality of mounting screw holes corresponding to the adjustment slots 17 one by one. The molding platform 1 is fixed to the mounting frame 2 by fasteners.

[0048] The leveling device includes a leveling base plate 14, which is detachably arranged on the frame. The lifting drive mechanism drives the molding platform 1 to descend, so that the lower bottom surface of the molding platform 1 is attached to the upper surface of the leveling base plate 14. A locking mechanism locks the molding platform 1 on the leveling base plate 14, so that the lower bottom surface of the molding platform 1 and the upper surface of the leveling base plate 14 remain in contact with each other.

[0049] like Figure 2 As shown, the molding platform 1 is arranged on the lifting drive mechanism through a detachable structure, and the detachable structure includes a fixed block 3, and the fixed block 3 is fixedly connected to the slider of the lifting drive mechanism through a connecting piece 18. The molding platform 1 is horizontally slidably arranged on the fixed block 3 through the mounting frame 2, and a magnetic switch is also rotatably arranged in the fixed block 3. By rotating the magnetic switch, the fixed block 3 and the mounting frame 2 can be magnetized and adsorbed and fixed.

[0050] like Figure 3 and Figure 4As shown, the magnetic switch includes a magnet 4, a magnetic conductive block 5, and a magnetic conductive plate 6. Both the magnetic conductive block 5 and the magnetic conductive plate 6 can be magnetized by the magnet 4. The magnetic conductive block 5 is fixedly connected to the fixed block 3, and the magnetic conductive plate 6 is fixedly connected to the mounting frame 2. The magnetic conductive plate 6 is covered on the upper end surface of the magnetic conductive block 5. A magnetic isolation plate 7 is provided in the inner cavity of the magnetic conductive block 5. The magnetic isolation plate 7 separates the magnetic conductive block 5 into two parts, the magnet 4 is rotatably arranged on the magnetic isolation plate 7 through a rotating device, and the rotating device can drive the magnet 4 to rotate so that the magnetic conductive plate 6 and the magnetic conductive block 5 can be magnetized, adsorbed and fixed. The rotating device includes a handle, and the handle is fixedly connected to the magnet 4.

[0051] When the magnet 4 is in a vertical state, the magnetic lines of force are as follows: Figure 3 As shown, the magnetic plate 6 and the magnetic block 5 cannot be magnetized; turn the magnet 4 to a horizontal state, and the magnetic lines of force will be as follows Figure 4 As shown, both the magnetic conductive plate 6 and the magnetic conductive block 5 can be magnetized by the magnet 4 , and the magnetic conductive plate 6 and the magnetic conductive block 5 are adsorbed and fixed, thereby fixing the mounting frame 2 on the fixing block 3 .

[0052] The cross-sectional shape of the mounting frame 2 is an inverted U-shape, and the fixed block 3 is provided with two left-right symmetrical guide bevels 8. The two inner side surfaces of the mounting frame 2 are provided with matching surfaces corresponding to the guide bevels 8. The mounting frame 2 is pressed downwardly on the fixed block 3 so that the two guide bevels 8 fit with the corresponding matching surfaces to form left and right limit positions. The cross-sectional shape of the magnetic conductive plate 6 is an inverted U-shape, and the magnetic conductive plate 6 is fixedly arranged on the inner top surface of the mounting frame 2. The fixed block 3 is clamped at the U-shaped opening of the magnetic conductive plate 6. The U-shaped opening size of the magnetic conductive plate 6 is compatible with the outer size of the magnetic conductive block 5. The molding platform 1 is pushed into the fixed block 3 through the mounting frame 2, and the magnetic conductive plate 6 can be pushed to abut against the inner side surface of the fixed block 3, so that the position of the molding platform 1 corresponds to the position of the resin pool, forming positioning in the front and back and left and right directions.

[0053] like Figure 5 As shown, a pressure detection device is also provided on the frame, and the resin pool is arranged on the pressure detection device. The pressure detection device includes a mounting plate 10 and a pressure sensor 11. A plurality of pressure sensors 11 are fixedly arranged on the mounting plate 10. The mounting plate 10 is fixedly arranged on the frame. The detection end of the pressure sensor 11 is vertically facing upward, and the gravity of the resin pool is applied to the detection end of the pressure sensor 11. A table 12 is fixedly provided on the frame, and a mounting groove is provided on the upper surface of the table 12. The mounting plate 10 is embedded in the mounting groove, and the shape of the mounting plate 10 is adapted to the shape of the mounting groove. Four pressure sensors 11 are evenly distributed at the four top corners of the rectangular mounting plate 10. A pad 13 is also provided between the pressure sensor 11 and the resin pool, and the resin pool is detachably arranged on the pad 13.

[0054] like Figure 6As shown, the locking mechanism includes a pressing block 15, a leveling base plate 14 is detachably arranged on the above-mentioned pad 13, two pressing blocks 15 are fixedly arranged on the leveling base plate 14 symmetrically, and a limiting card slot 16 is opened on the pressing block 15. The limiting card slots 16 of the two pressing blocks 15 face each other, and the left and right ends of the above-mentioned forming platform 1 are respectively embedded in the two limiting card slots 16, and the two pressing blocks 15 are detachably connected to the leveling base plate 14. The limiting card slot 16 is arranged through the length direction of the pressing block 15, and the cross-sectional shape of the limiting card slot 16 is a right-angled trapezoid. The shape of the lower half of the forming platform 1 is two right-angled trapezoids symmetrically, and the sizes of the left and right ends of the forming platform 1 are adapted to the sizes of the two limiting card slots 16.

[0055] The leveling method of a light-curing 3D printer described in the present invention uses the leveling device of the light-curing 3D printer to perform adjustment, and it includes the following steps:

[0056] 1. Remove the resin pool from the pad 13;

[0057] 2. Loosen the fasteners on the adjustment slot 17 of the molding platform 1;

[0058] 3. Fix the leveling base plate 14 to the pad 13 by fasteners;

[0059] 4. The lifting drive mechanism drives the molding platform 1 to descend, so that the molding platform 1 and the leveling bottom plate 14 fit naturally;

[0060] 5. Fix the two pressing blocks 15 on the leveling bottom plate 14 by fasteners, so that the left and right ends of the molding platform 1 are respectively embedded in the two limit slots 16, so that the lower bottom surface of the molding platform 1 and the upper surface of the leveling bottom plate 14 are kept in contact with each other;

[0061] 6. Tighten the fasteners on the adjustment slot 17 of the molding platform 1;

[0062] 7. Remove the two pressing blocks 15, drive the forming platform 1 to lift, and remove the leveling bottom plate 14.

[0063] It should be understood that in the claims and description of the present invention, all "including..." should be understood as an open-ended meaning, that is, its meaning is equivalent to "at least contains...", and should not be understood as a closed meaning, that is, its meaning should not be understood as "only includes...".

[0064] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A light-curing 3D printer, comprising a frame and a resin pool, a molding platform (1), a lifting drive mechanism, and a light source arranged on the frame, wherein the molding platform (1) is arranged above the resin pool, the light source is arranged below the resin pool, and the lifting drive mechanism drives the molding platform (1) to rise and fall in the resin pool, characterized in that: The printer further comprises a leveling device, which is used to adjust the horizontality of the molding platform (1); the molding platform (1) is arranged on the lifting drive mechanism via a mounting frame (2); the molding platform (1) is movably sleeved on the bottom of the mounting frame (2); a locking structure fixes the molding platform (1) on the mounting frame (2); the leveling device comprises a leveling base plate (14); the leveling base plate (14) is detachably arranged on the frame; the lifting drive mechanism drives the molding platform (1) to descend, so that the lower bottom surface of the molding platform (1) is attached to the upper surface of the leveling base plate (14); a locking mechanism locks the molding platform (1) on the leveling base plate (14), so that the molding platform The lower bottom surface of the molding platform (1) is kept in contact with the upper surface of the leveling base plate (14); the frame is also provided with a pad (13), and the resin pool is detachably arranged on the pad (13); the leveling base plate (14) is detachably arranged on the pad (13); the locking mechanism comprises a pressing block (15), two pressing blocks (15) are symmetrically fixedly arranged on the leveling base plate (14), and the pressing blocks (15) are provided with limit slots (16), and the limit slots (16) of the two pressing blocks (15) face each other, and the left and right ends of the molding platform (1) are respectively embedded in the two limit slots (16), and the two pressing blocks (15) are detachably connected to the leveling base plate (14).

2. A light-curing 3D printer according to claim 1, characterized in that: The molding platform (1) is arranged on the lifting drive mechanism via a detachable structure, the detachable structure comprising a fixed block (3), the fixed block (3) being fixedly connected to a slider of the lifting drive mechanism via a connecting piece (18), the molding platform (1) being arranged on the fixed block (3) via a mounting frame (2) for horizontal sliding, a magnetic switch being rotatably arranged in the fixed block (3), and by rotating the magnetic switch, the fixed block (3) and the mounting frame (2) can be magnetized, adsorbed and fixed.

3. A light-curing 3D printer according to claim 2, characterized in that: The magnetic switch comprises a magnet (4), a magnetic conductive block (5), and a magnetic conductive plate (6). The magnetic conductive block (5) and the magnetic conductive plate (6) can both be magnetized by the magnet (4). The magnetic conductive block (5) is fixedly connected to the fixed block (3), the magnetic conductive plate (6) is fixedly connected to the mounting frame (2), the magnetic conductive plate (6) is covered on the upper end surface of the magnetic conductive block (5), a magnetic isolation plate (7) is provided in the inner cavity of the magnetic conductive block (5), and the magnetic isolation plate (7) separates the magnetic conductive block (5) into two left and right parts. The magnet (4) is rotatably arranged on the magnetic isolation plate (7) by a rotating device, and the rotating device can drive the magnet (4) to rotate so that the magnetic conductive plate (6) and the magnetic conductive block (5) can be magnetized, adsorbed and fixed.

4. A light-curing 3D printer according to claim 2, characterized in that: The cross-sectional shape of the mounting frame (2) is an inverted U-shape, and the fixing block (3) is provided with two left-right symmetrical guiding inclined surfaces (8). The two inner side surfaces of the mounting frame (2) are provided with matching surfaces corresponding to the guiding inclined surfaces (8). The mounting frame (2) is pressed downwardly onto the fixing block (3) so that the two guiding inclined surfaces (8) fit with the corresponding matching surfaces to form left-right limit positions.

5. A light-curing 3D printer according to claim 3, characterized in that: The cross-sectional shape of the magnetic conductive plate (6) is an inverted U-shape. The magnetic conductive plate (6) is fixedly arranged on the inner top surface of the mounting frame (2). The fixed block (3) is clamped at the U-shaped opening of the magnetic conductive plate (6). The size of the U-shaped opening of the magnetic conductive plate (6) is compatible with the outer dimensions of the magnetic conductive block (5). The molding platform (1) is pushed into the fixed block (3) through the mounting frame (2). The magnetic conductive plate (6) can be pushed until it abuts against the inner side surface of the fixed block (3), so that the position of the molding platform (1) corresponds to the position of the resin pool.

6. A light-curing 3D printer according to claim 1, characterized in that: The limit slot (16) is arranged along the length direction of the pressing block (15), and the cross-sectional shape of the limit slot (16) is a right-angled trapezoid. The shape of the lower half of the forming platform (1) is two right-angled trapezoids that are symmetrical on the left and right. The dimensions of the left and right ends of the forming platform (1) are compatible with the dimensions of the two limit slots (16). The forming platform (1) is provided with a plurality of vertically arranged adjustment slots (17), and the mounting frame (2) is provided with a plurality of mounting screw holes that correspond one to one with the adjustment slots (17).

7. A method for leveling a light-curing 3D printer, using the light-curing 3D printer of claim 6 for leveling, characterized in that: It includes the following steps: ①. Remove the resin pool from the pad (13); ②, loosen the fastener on the adjustment slot (17) of the molding platform (1); ③, fixing the leveling base plate (14) on the backing plate (13) by means of fasteners; ④. The lifting drive mechanism drives the molding platform (1) to descend, so that the molding platform (1) and the leveling bottom plate (14) fit naturally; ⑤. Fix the two pressing blocks (15) on the leveling base plate (14) by means of fasteners, so that the left and right ends of the molding platform (1) are respectively embedded in the two limit slots (16), so that the lower surface of the molding platform (1) and the upper surface of the leveling base plate (14) are kept in a fitted state; ⑥ Tighten the fasteners on the adjustment slot (17) of the molding platform (1); ⑦. Remove the two pressing blocks (15), drive the forming platform (1) to lift up, and remove the leveling bottom plate (14).

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