A liquid drainage device for a photocuring 3D printer

Abstract

The present invention relates to a liquid drainage device for a light-curing 3D printer, comprising: a resin tank portion, which is arranged on a machine table and is parallel to a printing platform. In the present invention, through the upward pushing operation of a lifting portion, the bottom of the resin tank portion bulges to form a slope facilitating the scattered flow of photosensitive resin, so that the photosensitive resin is concentrated at one place for centralized recovery, avoiding waste caused by multiple strands of residue and adhesion; and through the upward pushing operation of the lifting portion, the closed state of the drainage portion with respect to the resin tank portion is released, and the opening of the sealed liquid accumulation portion is opened by the thrust, and the photosensitive resin flowing out of the resin tank portion can directly flow into the sealed liquid accumulation portion for storage, and the opening of the sealed liquid accumulation portion can reach the closed state through the reset operation of the lifting portion, thereby ensuring the quality of the storage environment of the photosensitive resin. The device can realize the coordinated steps of multiple stages of photosensitive resin recovery through one action of the lifting portion, improving the drainage and recovery efficiency of the photosensitive resin.

Description

Technical Field

[0001] The present invention relates to the technical field of light-curing 3D printers, and specifically relates to a liquid drainage device for a light-curing 3D printer. Background Art

[0002] The light-curing 3D printing technology selectively cures photosensitive resin layer by layer through computer-controlled ultraviolet light beams, and controls the displacement of the platform in the z-axis direction to cure the next layer of photosensitive resin on the cured layer of the previous layer, thereby completing the production of 3D printed parts. Among them, the research and development of photosensitive resin is the key to the application of the light-curing forming technology. Light-curing 3D printing uses a radiation light source to irradiate liquid photosensitive resin to initiate a chain chemical reaction, linking a large number of small molecule monomers or prepolymers together to form a highly cross-linked polymer.

[0003] After the printing work is completed, the resin needs to be shielded and stored in time to avoid solidification caused by adverse effects such as external light sources, which will affect the next printing work. The photosensitive resin recovery system of the 3D printer with the existing publication patent number CN201720851366.9 sets a recovery device between the photosensitive resin tank and the storage device. The recovery device includes a recovery pipe, the input end and the output end of the recovery pipe are respectively communicated with the photosensitive resin tank and the storage device, and the recovery device further includes a second one-way pump, which is arranged on the recovery pipe and drives the photosensitive resin to flow from the photosensitive resin tank to the storage device. This patent has the following problems;

[0004] 1. The photosensitive resin has a certain viscosity, and the bottom surface of the resin tank is generally horizontal. Using only a pump as the power to recover the photosensitive resin will cause the viscous photosensitive resin to be divided into multiple strands and remain in the resin tank, resulting in waste;

[0005] 2. The recovery process of the photosensitive resin cannot be carried out at the same time interval as the closing process after the photosensitive resin is recovered, so that the recovered photosensitive resin cannot obtain the optimal storage state. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: to overcome the technical problem of the recovery of photosensitive resin after use in the prior art, and provide a liquid drainage device for a light-curing 3D printer.

[0007] The technical solution adopted by the present invention to solve its technical problems is: a liquid drainage device for a light-curing 3D printer, including:

[0008] A resin tank part, which is arranged on the machine table and is parallel to the printing platform. The printing platform can be lowered into the resin tank part, and the resin tank part can store photosensitive resin;

[0009] A lifting part, the lifting part is arranged inside the machine platform, and the lifting part is against the bottom end of the resin tank;

[0010] A liquid discharge part, one end of which is hinged to the lifting part, and the other end of which closes the resin tank part;

[0011] A sealed liquid accumulation part is arranged inside the machine, and the sealed liquid accumulation part is against the lifting part, wherein

[0012] The lifting part is driven, and the lifting part can push the bottom of the resin tank part to bulge, pull down the drainage part to open, and push the sealed liquid accumulation part to open, so that the photosensitive resin is recovered to the sealed liquid accumulation part through the resin tank part and the drainage part;

[0013] The lifting part is driven in reverse, and the resin tank part, the liquid accumulation part and the sealed liquid accumulation part are all reset to move, so that the photosensitive resin is recovered to the sealed liquid accumulation part and then sealed.

[0014] Furthermore, the lifting part includes a cylinder arranged inside the machine platform, a push block arranged on the telescopic shaft of the cylinder, a plurality of vertical rods arranged around the push block in a frame shape, and a plurality of bending rods vertically connected to the outer sides of the plurality of vertical rods;

[0015] The push block abuts against the resin tank portion.

[0016] Further, the resin tank portion includes a printing tank and a black adhesive film glued to the bottom of the printing tank;

[0017] The black rubber film is elastic;

[0018] The push block abuts against the black film, wherein

[0019] By driving the air cylinder, the push block can push the black film to deform, so that the photosensitive resin can flow in the printing slot.

[0020] Furthermore, the resin tank portion also includes a plurality of liquid passages arranged around the printing tank in a frame shape and

[0021] A plurality of oblique channels are provided at the side ends of the plurality of liquid passages, wherein;

[0022] After the photosensitive resin flows in the printing slot, it can be divided into a plurality of the liquid passages.

[0023] Further, the liquid discharge part includes a plurality of first connecting rods arranged on the push block in a frame shape, a plurality of second connecting rods hinged on the plurality of first connecting rods, a plurality of fixing rods hinged on the middle ends of the plurality of second connecting rods, and a plurality of closing rods hinged on one ends of the plurality of second connecting rods;

[0024] A plurality of the fixing rods are arranged on the machine table;

[0025] One end of a plurality of the closing rods closes a plurality of the liquid passageways, wherein

[0026] The pushing block can pull a plurality of the first connecting rods, and a plurality of the first connecting rods can pull a plurality of the second connecting rods to rotate, so that a plurality of the second connecting rods pull a plurality of the closing rods to move downward along a plurality of the liquid passageways to open the inclined channels.

[0027] Furthermore, the sealed liquid accumulation part includes a plurality of flared channels arranged inside the machine table, an annular cavity communicated with the bottoms of a plurality of the flared channels, a plurality of track sleeves arranged on a plurality of the flared channels, a plurality of closing plates inserted into a plurality of the track sleeves, and a plurality of force-receiving grooves arranged on a plurality of the closing plates;

[0028] The inner sides of a plurality of the bending rods can be laterally abutted against the inner sides of a plurality of the force-receiving grooves, wherein

[0029] The pushing block can drive a plurality of the vertical rods to rise, so that a plurality of the vertical rods drive a plurality of the bending rods to push a plurality of the force-receiving grooves upward, so that a plurality of the force-receiving grooves drive a plurality of the closing plates to horizontally displace along a plurality of the tracks to open a plurality of the flared channels.

[0030] Furthermore, the sealed liquid accumulation part further includes a plurality of springs;

[0031] One end of a plurality of the springs is connected to a plurality of the closing plates, and the other end of a plurality of the springs is connected to the outer walls of a plurality of the flared channels, wherein

[0032] When a plurality of the force-receiving grooves drive a plurality of the closing plates to horizontally displace along a plurality of the tracks, a plurality of the springs can be stretched.

[0033] Furthermore, a liquid drainage device for a light-curing 3D printer further includes a liquid replenishment part;

[0034] The liquid replenishment part includes a pumping and delivering pump arranged inside the annular cavity, an output pipe communicated with the output end of the pumping and delivering pump, a plurality of liquid replenishment channels arranged in a frame shape on the side end of the printing tank, a plurality of one-way valves arranged at the ends of a plurality of the liquid replenishment channels, and a plurality of anti-liquid pipes arranged between a plurality of the liquid replenishment channels and the output pipe, wherein

[0035] By driving the pumping and delivering pump, photosensitive resin can enter a plurality of the liquid replenishment channels through the output pipe and a plurality of the anti-liquid pipes, so that the photosensitive resin impacts a plurality of the one-way valves to be opened and is replenished into the printing tank.

[0036] The beneficial effects of the present invention are as follows. Through the upward pushing operation of the lifting part, the bottom of the resin tank part bulges to form a slope that facilitates the scattered flow of the photosensitive resin, enabling the photosensitive resin to be concentrated and recovered at one place, thus avoiding waste caused by multiple strands of residue and adhesion. Moreover, through the upward pushing operation of the lifting part, the closed state of the drainage part with respect to the resin tank part is released, and the through-hole of the sealed liquid accumulation part is opened by the thrust. The photosensitive resin flowing out of the resin tank part can directly flow into the sealed liquid accumulation part for storage, and the through-hole of the sealed liquid accumulation part can return to the closed state through the reset operation of the lifting part, thereby ensuring the quality of the storage environment of the photosensitive resin. The device can achieve coordinated steps in multiple stages of the drainage and recovery of the photosensitive resin through one action of the lifting part, improving the drainage and recovery efficiency of the photosensitive resin. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The present invention will be further described below with reference to the drawings and embodiments.

[0038] Figure 1 is a perspective view of a preferred embodiment of the present invention;

[0039] Figure 2 is a perspective view of a preferred embodiment of the resin tank part of the present invention;

[0040] Figure 3 is of the present invention Figure 2 front elevation sectional view;

[0041] Figure 4 is of the present invention Figure 3 enlarged view at A in;

[0042] Figure 5 is of the present invention Figure 3 enlarged view at B in;

[0043] Figure 6 is a top view of the annular cavity of the present invention.

[0044] In the figures:

[0045] 1. Resin tank part; 11. Printing tank; 12. Black glue film; 13. Liquid passage; 14. Oblique passage;

[0046] 2. Machine platform;

[0047] 3. Printing platform;

[0048] 4. Lifting part; 41. Cylinder; 42. Pusher block; 43. Vertical rod; 44. Bent rod;

[0049] 5. Drainage part; 51. First connecting rod; 52. Second connecting rod; 53. Fixed rod; 54. Closing rod;

[0050] 6. Liquid-sealing and accumulating part; 61. Flared channel; 62. Annular cavity; 63. Track sleeve; 64. Sealing plate; 65. Stress groove; 66. Spring;

[0051] 7. Liquid replenishing part; 71. Pumping and delivering pump; 72. Output pipe; 73. Liquid replenishing channel; 74. Liquid backflow pipe. Detailed implementation manners

[0052] Now, the present invention will be further described in detail with reference to the accompanying drawings. These drawings are all simplified schematic diagrams, only illustrating the basic structure of the present invention in a schematic manner, so they only show the components related to the present invention.

[0053] As Figure 1 shown, Figure 1 is a perspective view of a preferred embodiment of the present invention; as Figure 2 shown, Figure 2 is a perspective view of a preferred embodiment of the resin tank part of the present invention; as Figure 3 shown, Figure 3 is the Figure 2 front elevation sectional view of the present invention; as Figure 4 shown, Figure 4 is the Figure 3 enlarged view at A in the present invention; as Figure 5 shown,

[0054] Figure 5 is the Figure 3 enlarged view at B in the present invention; as Figure 6 shown, Figure 6 is the top view of the annular cavity of the present invention, as Figure 1-6 shown, the present invention provides a liquid discharging device for a light-curing 3D printer, including:

[0055] Resin tank part 1, the resin tank part 1 is arranged on the machine table 2 and is parallel to the printing platform 3 above, the printing platform 3 can be lowered into the resin tank part 1, and the resin tank part 1 can store photosensitive resin;

[0056] Lifting part 4, the lifting part 4 is arranged inside the machine table 2, and the lifting part 4 abuts against the bottom end of the resin tank part 1;

[0057] Liquid discharging part 5, one end of the liquid discharging part 5 is hinged to the lifting part 4, and the other end of the liquid discharging part 5 closes the resin tank part 1;

[0058] Liquid-sealing and accumulating part 6, the liquid-sealing and accumulating part 6 is arranged inside the machine table 2, and the liquid-sealing and accumulating part 6 abuts against the side of the lifting part 4, wherein

[0059] Drive the lifting part 4, and the lifting part 4 can push up the bottom of the resin tank part 1 to bulge, pull down the liquid discharge part 5 to open and push the sealed liquid accumulation part 6 to open, so that the photosensitive resin is recovered to the sealed liquid accumulation part 6 through the resin tank part 1 and the liquid discharge part 5;

[0060] Drive the lifting part 4 in reverse, and the resin tank part 1, the liquid accumulation part and the sealed liquid accumulation part 6 all reset and move, so that the photosensitive resin is sealed after being recovered to the sealed liquid accumulation part 6. Specifically, in the prior art, the recovery of photosensitive resin is mostly achieved by pouring different containers or sucking by external components, and its operation process is quite inconvenient, and the quality of the recovered photosensitive resin is not good. Compared with the prior art, through the upward push of the lifting part 4, the bottom of the resin tank part 1 bulges to form a slope that facilitates the scattered flow of the photosensitive resin, so that the photosensitive resin is concentrated in one place for centralized recovery to avoid waste caused by multiple strands of residue and adhesion; and through the upward push of the lifting part 4, the closed state of the liquid discharge part 5 for the resin tank part 1 is released, and the opening of the sealed liquid accumulation part 6 is opened by the thrust, and the photosensitive resin flowing out of the resin tank part 1 can directly flow into the sealed liquid accumulation part 6 for storage. The opening of the sealed liquid accumulation part 6 can be reset to be closed through the lifting part 4 to ensure the quality of the storage environment of the photosensitive resin. The device can realize the coordinated steps of multiple stages of photosensitive resin recovery through one action of the lifting part 4, so as to improve the drainage and recovery efficiency of the photosensitive resin.

[0061] Optionally, the lifting part 4 includes a cylinder 41 arranged inside the machine table 2, a push block 42 arranged on the telescopic shaft of the cylinder 41, a plurality of vertical rods 43 arranged around the push block 42 in a frame shape, and a plurality of bending rods 44 vertically connected to the outside of the plurality of vertical rods 43;

[0062] The push block 42 abuts against the resin tank part 1. Specifically, the cylinder 41 can drive the push block 42 to lift vertically. The top surface of the push block 42 is a plane. The plurality of vertical rods 43 are used to connect the plurality of bending rods 44 at a certain height. The bending rods 44 include a cross section vertically connected to the vertical rod 43 and an inclined section integrally extending outward and upward. The angle of the inclined section provides a good prerequisite for the opening and closing of the sealed liquid accumulation part 6.

[0063] Optionally, the resin tank part 1 includes a printing tank 11 and a black glue film 12 glued to the bottom of the printing tank 11;

[0064] The black glue film 12 has elasticity;

[0065] The push block 42 abuts against the black glue film 12, wherein

[0066] By driving the air cylinder 41, the push block 42 can push the black film 12 to deform so that the photosensitive resin can flow in all directions in the printing slot 11. Specifically, the printing slot 11 has an integrated shape with an edge, which can be used to support the black film 12. The area of ​​the black film 12 is smaller than that of the printing slot 11, and the lower end of the black film 12 is parallel to the upper end surface of the push block 42. When the push block 42 is pushed upward, the black film 12 bulges upward to form a shape similar to a four-sided pyramid. Therefore, the photosensitive resin inside the printing slot 11 flows from the center to the surroundings, reducing the situation where multiple strands of it remain on the horizontal plane.

[0067] Optionally, the resin tank portion 1 further includes a plurality of liquid passages 13 arranged in a frame-like manner around the printing tank 11 and a plurality of oblique channels 14 opened at the side ends of the plurality of liquid passages 13, wherein;

[0068] After the photosensitive resin flows in the printing slot 11, it can be diverted into several of the liquid channels 13. Specifically, the liquid channel 13 exists as the discharge port of the printing slot 11, and the photosensitive resin can also be stored inside it under normal conditions. The front half of the liquid channel 13 is arc-shaped, and the rear half is bent. The bent rear half is interspersed with the discharge part 5 to close the oblique channel 14. When the position of the discharge part 5 changes, the oblique channel 14 is liquid-passing, and the solution in the printing slot 11 is diverted and diverted through the guiding effect of the liquid channel 13 to improve efficiency.

[0069] Optionally, the liquid discharge portion 5 includes a plurality of first connecting rods 51 arranged in a frame shape on the push block 42, a plurality of second connecting rods 52 hinged on the plurality of first connecting rods 51, a plurality of fixing rods 53 hinged on the middle ends of the plurality of second connecting rods 52, and a plurality of closing rods 54 hinged on one end of the plurality of second connecting rods 52;

[0070] A plurality of fixing rods 53 are arranged on the machine platform 2;

[0071] One end of the plurality of closing rods 54 closes the plurality of liquid passages 13, wherein

[0072] The pushing block 42 can pull a plurality of the first connecting rods 51, and the plurality of the first connecting rods 51 can pull a plurality of the second connecting rods 52 to rotate, so that the plurality of the second connecting rods 52 pull a plurality of the closing rods 54 to move downward along a plurality of the liquid passageways 13 to open the inclined passageways 14. Specifically, during the process of the pushing block 42 pulling up the first connecting rod 51, the second connecting rod 52 rotates like a lever to a state where the right side is higher and the left side is lower. Its acting process can also be conducted to the closing rod 54 through the second connecting rod 52, so that the closing rod 54 moves down in the liquid passageway 13 and moves out of the closed state of the inclined passageway 14. The material of the closing rod 54 can be a flexible colloid, and its interference fit with the liquid passageway 13 ensures that the photosensitive resin does not leak in the printing tank 11. The driving mode of the closing rod 54 also makes its use more flexible.

[0073] Optionally, the sealing liquid accumulation part 6 includes a plurality of flared channels 61 arranged inside the machine table 2, an annular cavity 62 connected to the bottom ends of the plurality of flared channels 61, a plurality of track sleeves 63 arranged on the plurality of flared channels 61, a plurality of closing plates 64 inserted in the plurality of track sleeves 63, and a plurality of force-receiving grooves 65 arranged on the plurality of closing plates 64;

[0074] The inner sides of the plurality of bending rods 44 can laterally abut against the inner sides of the plurality of force-receiving grooves 65, where

[0075] The pushing block 42 can drive a plurality of the vertical rods 43 to rise, so that the plurality of the vertical rods 43 drive a plurality of the bending rods 44 to push up a plurality of the force-receiving grooves 65, so that the plurality of the force-receiving grooves 65 drive a plurality of the closing plates 64 to horizontally displace along the plurality of track sleeves 63 to open the plurality of flared channels 61. Specifically, the flared channels 61 are in the shape of being wider at the top and narrower at the bottom. The outer wall of the flared channel 61 is coplanar with the inner wall of the machine table 2. The size of the upper opening of the flared channel 61 is larger than the size of the inclined passageway 14, making it safer for the photosensitive resin liquid discharged from the inclined passageway 14 to fall into the flared channel 61 until the photosensitive resin liquid enters the annular cavity 62 and is stored. The annular cavity 62 will not obstruct the position of the air cylinder 41. The inner inclined surface of the bending rod 44 can laterally push the inner groove surface of the force-receiving groove 65 during the rising process, so that the closing plate 64 moves in a direction away from the flared channel 61 to open the flared channel 61. The track sleeve 63 plays a limiting role on the closing plate 64, enabling the closing plate 64 to only move radially and not sway left and right, making the closing position of the closing plate 64 for the flared channel 61 accurate.

[0076] Optionally, the sealing liquid accumulation part 6 further includes a plurality of springs 66;

[0077] One ends of the plurality of springs 66 are connected to the plurality of closing plates 64, and the other ends of the plurality of springs 66 are connected to the outer walls of the plurality of flared channels 61, where

[0078] When a plurality of the force-receiving grooves 65 drive a plurality of the closing plates 64 to horizontally displace along a plurality of the track sleeves 63, a plurality of the springs 66 can be stretched. Specifically, the opening state of the closing plate 64 stretches the springs 66, and the springs 66 store energy during this process. When the force-receiving groove 65 no longer receives the acting force of the bending rod 44, the springs 66 release the stored energy to reset the closing plate 64 to close the flared channel 61, enabling the automated closing of the storage space of the photosensitive resin.

[0079] Optionally, a liquid discharging device for a light-curing 3D printer further includes a liquid supplementing part 7;

[0080] The liquid supplementing part 7 includes a pumping pump 71 arranged inside the annular cavity 62, an output pipe 72 communicating with the output end of the pumping pump 71, a plurality of liquid supplementing channels 73 arranged in a frame shape at the side end of the printing tank 11, a plurality of one-way valves arranged at the ends of the plurality of liquid supplementing channels 73, and a plurality of anti-liquid pipes 74 arranged between the plurality of liquid supplementing channels 73 and the output pipe 72, wherein

[0081] By driving the pumping pump 71, the photosensitive resin can enter the plurality of liquid supplementing channels 73 through the output pipe 72 and the plurality of anti-liquid pipes 74, so that the photosensitive resin impacts and opens the plurality of one-way valves and is supplemented to the printing tank 11. Specifically, when printing work is required again, the pumping pump 71 is driven, so that the photosensitive resin in the annular cavity 62 flows back into the printing tank 11 through the output pipe 72, the plurality of anti-liquid pipes 74, and the plurality of liquid supplementing channels 73 to achieve the liquid supplementing work. Moreover, the plurality of one-way valves can be opened by the one-way flow of the photosensitive resin, preventing its reverse flow, so that the subsequent printing work can proceed smoothly after the photosensitive resin is stored in the printing tank 11.

[0082] Inspired by the ideal embodiments of the present invention described above, through the above description, relevant staff can make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A liquid drainage device for a photocuring 3D printer, characterized in that, include: A resin tank portion (1), the resin tank portion (1) being arranged on the machine platform (2) and being parallel to the printing platform (3), the printing platform (3) being capable of descending into the resin tank portion (1), and the resin tank portion (1) being capable of storing photosensitive resin; A lifting part (4), the lifting part (4) being arranged inside the machine platform (2), and the lifting part (4) being against the bottom end of the resin tank part (1); A liquid discharge portion (5), one end of the liquid discharge portion (5) being hingedly connected to the lifting portion (4), and the other end of the liquid discharge portion (5) sealing the resin tank portion (1); A sealed liquid accumulation portion (6), the sealed liquid accumulation portion (6) being arranged inside the machine platform (2), and the sealed liquid accumulation portion (6) abuts against the lifting portion (4), wherein The lifting part (4) is driven, and the lifting part (4) is capable of pushing the bottom of the resin tank part (1) to bulge, pulling down the drainage part (5) to open, and pushing the sealed liquid accumulation part (6) to open, so that the photosensitive resin is recovered to the sealed liquid accumulation part (6) through the resin tank part (1) and the drainage part (5); The lifting part (4) is driven in reverse, and the resin tank part (1), the liquid accumulation part and the sealed liquid accumulation part (6) are all reset to move, so that the photosensitive resin is recovered to the sealed liquid accumulation part (6) and then sealed; The lifting part (4) comprises a cylinder (41) arranged inside the machine platform (2), a push block (42) arranged on the telescopic shaft of the cylinder (41), a plurality of vertical rods (43) arranged around the push block (42) in the shape of a frame, and a plurality of bending rods (44) vertically connected to the outside of the plurality of vertical rods (43); The push block (42) abuts against the resin tank portion (1); The resin tank portion (1) comprises a printing tank (11) and a black adhesive film (12) glued to the bottom of the printing tank (11); The black rubber film (12) is elastic; The push block (42) abuts against the black adhesive film (12), wherein By driving the air cylinder (41), the push block (42) can push the black glue film (12) to deform, so that the photosensitive resin flows in the printing groove (11).

2. A liquid discharge device for a light-curing 3D printer as claimed in claim 1, characterized in that: The resin tank portion (1) further comprises a plurality of liquid passages (13) arranged in a frame-like manner around the printing tank (11); A plurality of oblique channels (14) are provided at the side ends of the plurality of liquid passage channels (13), wherein; After the photosensitive resin flows in the printing groove (11), it can be divided into a plurality of the liquid passages (13).

3. A liquid discharge device for a light-curing 3D printer as claimed in claim 2, characterized in that: The liquid discharge portion (5) comprises a plurality of first connecting rods (51) arranged in a frame shape on the push block (42), a plurality of second connecting rods (52) hingedly connected to the plurality of first connecting rods (51), a plurality of fixing rods (53) hingedly connected to the middle ends of the plurality of second connecting rods (52), and a plurality of closing rods (54) hingedly connected to one ends of the plurality of second connecting rods (52); A plurality of fixing rods (53) are arranged on the machine platform (2); One end of a plurality of the closing rods (54) closes a plurality of the liquid passages (13), wherein The push block (42) is capable of pulling a plurality of the first connecting rods (51), and the plurality of the first connecting rods (51) are capable of pulling a plurality of the second connecting rods (52) to rotate, so that the plurality of the second connecting rods (52) pull a plurality of the closing rods (54) to move downward along the plurality of the liquid passages (13) to open the oblique channels (14).

4. A liquid discharge device for a light-curing 3D printer as claimed in claim 3, characterized in that: The sealed liquid accumulation part (6) comprises a plurality of flared channels (61) arranged inside the machine platform (2), an annular cavity (62) arranged at the bottom ends of the plurality of flared channels (61), a plurality of track sleeves (63) arranged on the plurality of flared channels (61), a plurality of closing plates (64) inserted in the plurality of track sleeves (63), and a plurality of force-bearing grooves (65) arranged on the plurality of closing plates (64); The inner sides of the plurality of bending rods (44) can abut against the inner sides of the plurality of force-bearing grooves (65), wherein The push block (42) can drive the plurality of vertical rods (43) to rise, so that the plurality of vertical rods (43) drive the plurality of bending rods (44) to push the plurality of force-bearing grooves (65) upward, so that the plurality of force-bearing grooves (65) drive the plurality of closing plates (64) to move horizontally along the plurality of track sleeves (63) to open the plurality of flaring channels (61).

5. A liquid discharge device for a light-curing 3D printer as claimed in claim 4, characterized in that: The sealed liquid accumulation portion (6) further includes a plurality of springs (66); One end of the plurality of springs (66) is connected to the plurality of closing plates (64), and the other end of the plurality of springs (66) is connected to the outer walls of the plurality of flaring channels (61), wherein When the plurality of force-bearing grooves (65) drive the plurality of closing plates (64) to move horizontally along the plurality of track sleeves (63), the plurality of springs (66) can be stretched.

6. A liquid discharge device for a light-curing 3D printer as claimed in claim 5, characterized in that: It also includes a fluid replenishment unit (7); The liquid replenishing part (7) comprises a pumping pump (71) arranged inside the annular cavity (62), an output pipe (72) connected to the output end of the pumping pump (71), a plurality of liquid replenishing channels (73) arranged in a frame-like manner at the side end of the printing slot (11), a plurality of one-way valves arranged at the ends of the plurality of liquid replenishing channels (73), and a plurality of liquid return pipes (74) arranged between the plurality of liquid replenishing channels (73) and the output pipe (72), wherein By driving the pumping pump (71), the photosensitive resin can enter the plurality of liquid replenishing channels (73) through the output tube (72) and the plurality of liquid return tubes (74), so that the photosensitive resin impacts the plurality of one-way valves to open and then replenishes the printing slot (11).

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