An automatic adjustment device for resin solution of a photocuring 3D printer

Abstract

The present invention relates to an automatic adjustment device for a resin solution used in a photocuring 3D printer, comprising: an inner resin solution tank, the inner resin solution tank is arranged in an outer resin solution tank, a transition gap is formed between the inner resin solution tank and the outer resin solution tank, the outer resin solution tank is arranged on a printer main body, and the inner resin solution tank and the transition gap are used for commonly storing the resin solution; the resin solution is placed in the inner resin solution tank, the transition gap and a transition cavity at the same liquid level height. When the liquid level height of the resin solution in the inner resin solution tank does not meet the printing requirement, the lifting adjustment part can be pressed down along the transition gap by the driving work of two cylinders, and the resin solution placed in the transition gap can be compressed from the adjustment cavity into the inner resin solution tank, so that the resin solution for adjusting the liquid level height meets the printing requirement in the inner resin solution tank, without residue and causing obstruction to the printing work.

Description

Technical Field

[0001] The present invention relates to the technical field of light-curing 3D printers, and particularly 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 a 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] The resin is stored in a storage tank, and its liquid level cannot be automatically adjusted to maintain an appropriate capacity. A synchronous liquid level adjustment device for an SLA 3D printer with the existing patent number CN201922120578.1 uses a filling bladder immersed in the liquid in the liquid tank as the key component for adjusting the liquid level. The filling bladder is inflated or deflated by pumping in or discharging the filling material to adjust the liquid level to rise or fall. However, this patent has the following problems;

[0004] During the adjustment process of the resin solution, it is easy for the liquid to not be fully utilized due to the blockage of the filling bladder or the gap generated between the filling bladder and the liquid tank of the photosensitive resin;

[0005] The added amount of the resin solution cannot be accurately maintained at a liquid level, and the excessive resin solution cannot be recovered in time for the next supplementary liquid addition. Summary of the Invention

[0006] The technical problem to be solved by the present invention is: to overcome the technical problem that the resin solution of a 3D printer in the prior art cannot be well adjusted, and to provide an automatic adjustment device for the resin solution of a light-curing 3D printer.

[0007] The technical solution adopted by the present invention to solve its technical problem is: an automatic adjustment device for the resin solution of a light-curing 3D printer, comprising:

[0008] An inner resin solution tank, the inner resin solution tank is arranged inside an outer resin solution tank, a transition gap is formed between the inner resin solution tank and the outer resin solution tank, the outer resin solution tank is arranged on a printer main body, and the inner resin solution tank and the transition gap are used for commonly storing the resin solution;

[0009] Adjustment chambers, a plurality of the adjustment chambers are arranged at the bottom of the inner resin solution tank, and the plurality of adjustment chambers communicate with the transition gap;

[0010] A lifting adjustment part is inserted into the transition gap, and the lifting adjustment part is connected to the output shafts of two cylinders through two connecting rods. The two cylinders are arranged mirror-symmetrically on both sides of the outer resin solution tank;

[0011] Transition cavities, a plurality of the transition cavities are arranged on the inner resin solution tank and communicated, and the resin solution is adapted to pass from the inner resin solution tank to the transition cavities;

[0012] Rotating adjustment parts, a plurality of the rotating adjustment parts are rotatably connected to a plurality of the transition cavities one by one. The plurality of rotating adjustment parts can close the plurality of transition cavities and store the resin solution in the plurality of transition cavities, where

[0013] By driving the two cylinders, the lifting adjustment part can vertically move along the transition gap in sequence and horizontally move after bending along the adjustment cavity, so that the resin solution is pressurized to increase the liquid level in the inner resin solution tank;

[0014] By rotating the plurality of rotating adjustment parts, the plurality of transition cavities can be opened, so that the resin solution can supplement the inner resin solution tank through the plurality of rotating adjustment parts and the plurality of transition cavities.

[0015] Further, the transition cavity includes a circular groove vertically arranged at the top of the inner resin solution tank, a first hole obliquely arranged on the inner resin solution tank, and a second hole obliquely arranged on the inner resin solution tank;

[0016] The second hole is symmetric with the first hole;

[0017] The first hole communicates with the circular groove;

[0018] The rotating adjustment part is inserted into the circular groove, where

[0019] When injecting liquid into the inner resin solution tank, the excess resin solution can flow through the first hole to the rotating adjustment part.

[0020] Further, the rotating adjustment part includes a hollow cylinder inserted into the circular groove and a plurality of tooth grooves arranged circumferentially on the hollow cylinder;

[0021] The resin solution automatic adjustment device for a light-curing 3D printer further includes a toothed belt;

[0022] The toothed belt meshes with a plurality of the tooth grooves, where

[0023] By rotating the toothed belt, the toothed belt can drive the tooth grooves to rotate, so that the hollow cylinder rotates.

[0024] Furthermore, the rotation adjustment part further includes a liquid inlet hole provided on one side of the hollow cylinder and a liquid outlet hole provided on the other side of the hollow cylinder;

[0025] The liquid outlet hole is symmetrically offset from the liquid inlet hole;

[0026] The liquid outlet hole can communicate with the second hole, where

[0027] When the hollow cylinder rotates, the second hole can communicate with the liquid outlet hole, so that the excess resin solution is discharged into the inner resin solution tank through the hollow cylinder and the liquid outlet hole.

[0028] Furthermore, the lifting adjustment part includes a lifting frame inserted into the transition gap, where

[0029] By driving the two cylinders, the lifting frame can move vertically along the transition gap, so that the resin solution increases towards the inner resin solution tank through the transition gap.

[0030] Furthermore, the lifting adjustment part further includes a plurality of fixing rods provided at the lower end of the lifting frame and a plurality of pistons provided at the lower ends of the plurality of fixing rods;

[0031] The fixing rods are elastic, where

[0032] When the lifting frame moves vertically along the transition gap, the plurality of fixing rods can drive the plurality of pistons to push down the outer resin solution tank and then bend, so that the plurality of pistons horizontally push the plurality of adjustment cavities to discharge the resin solution.

[0033] Furthermore, the piston includes a disc body and a hemispherical body integrally provided at the lower end of the disc body.

[0034] Furthermore, the resin solution automatic adjustment device for the light-curing 3D printer further includes a guide block;

[0035] The guide block is triangular, and a plurality of the guide blocks are arranged in the transition gap and abut against the inner edge of the outer resin solution tank at the lower part.

[0036] The beneficial effect of the present invention is that the resin solution is placed in the inner resin solution tank, the transition gap and the transition cavity at the same liquid level height. When the liquid level height of the resin solution in the inner resin solution tank does not meet the printing requirements, the lifting adjustment part can be pressed down along the transition gap by driving the two cylinders to work. The resin solution placed in the transition gap can be compressed from the adjustment cavity into the inner resin solution tank, so that the resin solution for adjusting the liquid level height meets the printing requirements in the inner resin solution tank, without residue and without causing obstacles to the printing work;

[0037] The resin solution is injected into the inner resin solution tank through an external container. When the liquid level is too high, the excess resin solution can reach the rotary adjustment part through the transition cavity for transitional storage. When the liquid level in the inner resin solution tank is low, the resin solution stored in the transitional storage can be discharged back to the inner resin solution tank through the transition cavity again by the rotary adjustment part for liquid replenishment work, making the liquid replenishment work automatic and flexible. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] The present invention will be further described below in conjunction with the drawings and embodiments.

[0039] Figure 1 is a perspective view of a preferred embodiment of the present invention;

[0040] Figure 2 is a front view of a preferred embodiment of the present invention;

[0041] Figure 3 is a partial front view schematic diagram of a preferred embodiment of the present invention;

[0042] Figure 4 is of the present invention Figure 3 enlarged view at A;

[0043] Figure 5 is a three-dimensional structure diagram of the tooth belt connection tooth groove of the present invention.

[0044] In the figure:

[0045] 1. Inner resin solution tank;

[0046] 2. Outer resin solution tank;

[0047] 3. Transition gap;

[0048] 4. On the printer main body;

[0049] 5. Transition cavity; 51. Circular groove; 52. First hole; 53. Second hole;

[0050] 6. Lifting adjustment part; 61. Lifting frame; 62. Fixed rod;

[0051] 63. Piston; 631. Disc body; 632. Hemispherical body;

[0052] 7. Connecting rod;

[0053] 8. Cylinder;

[0054] 9. Adjustment cavity;

[0055] 10. Rotary adjustment part; 101. Hollow cylinder; 102. Tooth groove; 103. Liquid inlet hole; 104. Liquid outlet hole;

[0056] 11. Guide block;

[0057] 12. Tooth belt Detailed implementation mode

[0058] The present invention will now 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.

[0059] 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 front view of a preferred embodiment of the present invention; as Figure 3 shown, Figure 3 is a partial front view schematic diagram of a preferred embodiment 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, Figure 5 is a three-dimensional structure diagram of the tooth belt connection tooth groove of the present invention. As Figures 1 - 5 shown, the present invention provides an automatic adjustment device for a resin solution of a light-curing 3D printer, including:

[0060] Inner resin solution tank 1, the inner resin solution tank 1 is arranged in the outer resin solution tank 2, a transition gap 3 is formed between the inner resin solution tank 1 and the outer resin solution tank 2, the outer resin solution tank 2 is arranged on the printer main body 4, and the inner resin solution tank 1 and the transition gap 3 are used for commonly storing the resin solution;

[0061] Adjustment cavity 9, several adjustment cavities 9 are arranged at the bottom of the inner resin solution tank 1, and several adjustment cavities 9 communicate with the transition gap 3;

[0062] Lifting adjustment part 6, the lifting adjustment part 6 is inserted into the transition gap 3, and the lifting adjustment part 6 is connected to the output shafts of two cylinders 8 through two connecting rods 7, and the two cylinders 8 are mirror-symmetrically arranged on both sides of the outer resin solution tank 2;

[0063] Transition cavity 5, several transition cavities 5 are arranged on the inner resin solution tank 1 and communicate with each other, and the resin solution is suitable for passing through the inner resin solution tank 1 to the transition cavity 5;

[0064] Rotating adjustment part 10, several rotating adjustment parts 10 are rotatably connected to several transition cavities 5 one by one, and several rotating adjustment parts 10 can close several transition cavities 5 and store the resin solution in several transition cavities 5, where

[0065] Driving the two cylinders 8, the lifting and adjusting part 6 can vertically move along the transition gap 3 in sequence and horizontally move after bending along the adjusting cavity 9, so that the resin solution is pressurized to increase the liquid level in the inner resin solution tank 1;

[0066] Rotating several of the rotation adjusting parts 10, several of the transition cavities 5 can be opened, so that the resin solution supplements the inner resin solution tank 1 through several of the rotation adjusting parts 10 and several of the transition cavities 5. Specifically, in the prior art, the addition amount of the resin solution is not well controlled, and the liquid level of the resin solution is easily wasted and cannot be fully utilized after being adjusted. Compared with the prior art, the resin solution is placed in the inner resin solution tank 1, the transition gap 3 and the transition cavity 5 at the same liquid level height. When the liquid level height of the resin solution in the inner resin solution tank 1 does not meet the printing requirement, the lifting and adjusting part 6 can be pressed down along the transition gap 3 by driving the two cylinders 8, and the resin solution placed in the transition gap 3 can be compressed from the adjusting cavity 9 into the inner resin solution tank 1, so that the resin solution for adjusting the liquid level height meets the printing requirement in the inner resin solution tank 1, without residue and causing obstacles to the printing work; the resin solution is injected into the inner resin solution tank 1 through an external container.

[0067] When the liquid level height is too high, the excess resin solution can reach the rotation adjusting part 10 through the transition cavity 5 for transitional storage. When the liquid level height of the inner resin solution tank 1 is low, the resin solution stored in the transitional storage can be discharged again through the transition cavity 5 to the inner resin solution tank 1 through the rotation adjusting part 10 for liquid supplementing work, so that the liquid supplementing work can be carried out automatically and flexibly. In one embodiment, a liquid level sensor can be added in the inner resin solution tank 1, which is electrically connected to an external driving mechanism. The external driving mechanism is set as a device capable of driving several rotation adjusting parts 10 to rotate. When the resin solution in the inner resin solution tank 1 is too low, the liquid level sensor drives the external driving mechanism to work to automatically rotate several rotation adjusting parts 10 to complete the automatic liquid supplementing work.

[0068] Optionally, the transition cavity 5 includes a circular groove 51 vertically arranged at the top of the inner resin solution tank 1, a first hole 52 obliquely arranged in the inner resin solution tank 1, and a second hole 53 obliquely arranged in the inner resin solution tank 1;

[0069] The second hole 53 is symmetrical with the first hole 52;

[0070] The first hole 52 communicates with the circular groove 51;

[0071] The rotation adjusting part 10 is inserted into the circular groove 51, wherein

[0072] Inject liquid into the inner resin solution tank 1, and the excess resin solution can flow through the first hole 52 to the rotation adjustment part 10. Specifically, the first hole 52 is set at an upward slope angle on the inner side of the inner resin solution tank 1. It is located in the upper half of the inner resin solution tank 1 and defines the liquid level position of the resin solution stored in the inner resin solution tank 1. When the inner resin solution tank 1 stores liquid, the resin solution exceeding the first hole 52 will enter the rotation adjustment part 10 through it. When the liquid in the inner resin solution tank 1 is too little, the liquid can be discharged back into the inner resin solution tank 1 through the second hole 53 by rotating the rotation adjustment part 10. The second hole 53 is set at a downward slope angle. The angle settings of the first hole 52 and the second hole 53 make the liquid flow more smoothly according to the functional requirements.

[0073] Optionally, the rotation adjustment part 10 includes a hollow cylinder 101 inserted into the circular groove 51 and a plurality of tooth grooves 102 arranged circumferentially on the hollow cylinder 101;

[0074] The resin solution automatic adjustment device for the light-curing 3D printer further includes a toothed belt 12;

[0075] The toothed belt 12 meshes with a plurality of the tooth grooves 102, where

[0076] Rotate the toothed belt 12, and the toothed belt 12 can drive the tooth grooves 102 to rotate, so that the hollow cylinder 101 rotates. Specifically, the hollow cylinder 101 can rotate in the circular groove 51, and the height of the hollow cylinder 101 is higher than that of the circular groove 51. In the meshing state of the tooth grooves 102 and the toothed belt 12, the force movement operation of the toothed belt 12 can drive a plurality of hollow cylinders 101 to rotate synchronously to realize its closing and opening operations. And in another embodiment, the toothed belt 12 can mesh with an external gear, and the external gear is driven by an external motor to realize the synchronous driving operation of a plurality of hollow cylinders 101.

[0077] Optionally, the rotation adjustment part 10 further includes a liquid inlet hole 103 arranged on one side of the hollow cylinder 101 and a liquid outlet hole 104 arranged on the other side of the hollow cylinder 101;

[0078] The liquid outlet hole 104 is symmetrically offset from the liquid inlet hole 103;

[0079] The liquid outlet hole 104 can communicate with the second hole 53, where

[0080] When the hollow cylinder 101 rotates, the second hole 53 can communicate with the liquid outlet hole 104, so that the excess resin solution can be discharged into the inner resin solution tank 1 through the hollow cylinder 101 and the liquid outlet hole 104. Specifically, the liquid storage process of the hollow cylinder 101 is based on the communication state of the liquid inlet hole 103 and the first hole 52. When the hollow cylinder 101 rotates and changes its angle, the liquid inlet hole 103 moves away from the first hole 52 and is closed, and the liquid outlet hole 104 changes from a closed state away from the second hole 53 to a state of communicating with the second hole 53. Therefore, the resin solution can smoothly flow out with the assistance of the angle of the second hole 53.

[0081] Optionally, the lifting and adjusting part 6 includes a lifting frame 61 inserted into the transition gap 3, where

[0082] By driving the two cylinders 8, the lifting frame 61 can move vertically along the transition gap 3, so that the resin solution can pass through the transition gap 3 and increase towards the inner resin solution tank 1. Specifically, the shapes of the transition gap 3 and the lifting frame 61 match. The outside of the lifting frame 61 can be made of a colloidal material to maintain a tight connection with the transition gap 3, so that the resin solution in the transition gap 3 is under balanced pressure, and the liquid level in the inner resin solution tank 1 can be stably lifted.

[0083] There are still the following problems with this device: the transitional resin solution is easily left in several adjusting cavities 9 and not utilized;

[0084] Optionally, the lifting and adjusting part 6 further includes a plurality of fixing rods 62 arranged at the lower end of the lifting frame 61 and a plurality of pistons 63 arranged at the lower ends of the plurality of fixing rods 62;

[0085] The fixing rods 62 are elastic, where

[0086] When the lifting frame 61 moves vertically along the transition gap 3, the plurality of fixing rods 62 can drive the plurality of pistons 63 to push down the outer resin solution tank 2 and then bend, so that the plurality of pistons 63 can horizontally push the plurality of adjusting cavities 9 to discharge the resin solution. Specifically, the plurality of fixing rods 62 drive the plurality of pistons 63 to descend with the descending operation of the lifting frame 61. When the plurality of pistons 63 touch the transition gap 3 below, the plurality of fixing rods 62 bend and drive the plurality of pistons 63 to change from a vertical position to a horizontal position and move towards the plurality of adjusting cavities 9, so that all the resin liquid in the adjusting cavities 9 can enter the inner resin solution tank 1 without residue to prepare for the printing work. The cross-sectional area of the fixing rod 62 is smaller than the cross-sectional area of the adjusting cavity 9 to avoid hindering the movement state of the piston 63.

[0087] Optionally, the piston 63 includes a disc body 631 and a hemispherical body 632 integrally provided at the lower end of the disc body 631. Specifically, the circumferential side wall of the disc body 631 can frictionally adjust the cavity 9 to ensure the sealing effect. The hemispherical body 632 can drive the disc body 631 to change the moving direction in a state of reducing resistance during the force application process, so that its moving process has a good guiding effect.

[0088] Optionally, the automatic adjustment device for the resin solution of the stereolithography 3D printer further includes a guide block 11;

[0089] The guide block 11 is triangular, and a plurality of the guide blocks 11 are arranged in the transition gap 3 and abut against the inner edge of the outer resin solution tank 2. Specifically, the inclined surface of the guide block 11 faces the position of the adjusting cavity 9, and the inclined surface can provide a good auxiliary effect for the direction-changing movement of the hemispherical body 632, making the work during the direction-changing movement of the hemispherical body 632 more convenient and improving the error tolerance rate.

[0090] Taking the ideal embodiments based on the present invention described above as an inspiration, through the above description, relevant workers can completely make various changes and modifications without departing from the technical idea of this invention. The technical scope of this 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. An automatic adjustment device for a resin solution used in a photocuring 3D printer, characterized in that, Comprising: An inner resin solution tank (1), the inner resin solution tank (1) is arranged inside an outer resin solution tank (2), a transition gap (3) is formed between the inner resin solution tank (1) and the outer resin solution tank (2), the outer resin solution tank (2) is arranged on a printer main body (4), and the inner resin solution tank (1) and the transition gap (3) are used for commonly storing resin solution; Adjusting cavities (9), a plurality of the adjusting cavities (9) are arranged at the bottom of the inner resin solution tank (1), and the plurality of adjusting cavities (9) communicate with the transition gap (3); A lifting and adjusting part (6), the lifting and adjusting part (6) is inserted into the transition gap (3), and the lifting and adjusting part (6) is connected to the output shafts of two cylinders (8) through two connecting rods (7), and the two cylinders (8) are arranged on both sides of the outer resin solution tank (2) in a mirror image manner; Transition cavities (5), a plurality of the transition cavities (5) are arranged on the inner resin solution tank (1) and communicate with each other, and resin solution is adapted to pass from the inner resin solution tank (1) to the transition cavities (5); Rotating and adjusting parts (10), a plurality of the rotating and adjusting parts (10) are rotatably connected to the plurality of transition cavities (5) one by one, and the plurality of rotating and adjusting parts (10) can close the plurality of transition cavities (5) and store the resin solution in the plurality of transition cavities (5), wherein By driving the two cylinders (8), the lifting and adjusting part (6) can vertically move along the transition gap (3) in sequence and horizontally move after bending along the adjusting cavity (9), so that the liquid level in the inner resin solution tank (1) increases after the resin solution is pressurized; By rotating the plurality of rotating and adjusting parts (10), the plurality of transition cavities (5) can be opened, so that the resin solution can supplement the inner resin solution tank (1) through the plurality of rotating and adjusting parts (10) and the plurality of transition cavities (5); The transition cavity (5) includes a circular groove (51) vertically arranged at the top end of the inner resin solution tank (1), a first hole (52) obliquely arranged on the inner resin solution tank (1), and a second hole (53) obliquely arranged on the inner resin solution tank (1); The second hole (53) is symmetrical with the first hole (5); The first hole (52) communicates with the circular groove (51); The rotating and adjusting part (10) is inserted into the circular groove (51), wherein When injecting liquid into the inner resin solution tank (1), the excess resin solution can flow to the rotating and adjusting part (10) through the first hole (52).

2. The automatic resin solution adjusting device for a stereolithography 3D printer according to claim 1, characterized in that The rotating and adjusting part (10) includes a hollow cylinder (101) inserted into the circular groove (51) and a plurality of tooth grooves (102) arranged circumferentially on the hollow cylinder (101); The automatic resin solution adjusting device for a stereolithography 3D printer further includes a toothed belt (12); The toothed belt (12) meshes with the plurality of tooth grooves (102), wherein Rotate the toothed belt (12), which can drive the tooth groove (102) to rotate so as to rotate the hollow cylinder (101).

3. The automatic resin solution adjusting device for a stereolithography 3D printer according to claim 2, characterized in that The rotation adjusting part (10) further includes a liquid inlet hole (103) arranged on one side of the hollow cylinder (101) and a liquid outlet hole (104) arranged on the other side of the hollow cylinder (101); The liquid outlet hole (104) is symmetrically offset from the liquid inlet hole (103); The liquid outlet hole (104) can communicate with the second hole (53), where When the hollow cylinder (101) rotates, the second hole (53) can communicate with the liquid outlet hole (104) so that the excess resin solution is discharged into the inner resin solution tank (1) through the hollow cylinder (101) and the liquid outlet hole (104).

4. The automatic resin solution adjusting device for a stereolithography 3D printer according to claim 3, characterized in that The lifting adjusting part (6) includes a lifting frame (61) inserted into the transition gap (3), where By driving the two cylinders (8), the lifting frame (61) can move vertically along the transition gap (3) so that the resin solution increases towards the inner resin solution tank (1) through the transition gap (3).

5. The automatic resin solution adjusting device for a stereolithography 3D printer according to claim 4, characterized in that The lifting adjusting part (6) further includes a plurality of fixing rods (62) arranged at the lower end of the lifting frame (61) and a plurality of pistons (63) arranged at the lower ends of the plurality of fixing rods (62); The fixing rods (62) are elastic, where When the lifting frame (61) moves vertically along the transition gap (3), the plurality of fixing rods (62) can drive the plurality of pistons (63) to push down the outer resin solution tank (2) and then bend, so that the plurality of pistons (63) push the plurality of adjusting cavities (9) horizontally to discharge the resin solution.

6. The automatic resin solution adjusting device for a stereolithography 3D printer according to claim 5, characterized in that The piston (63) includes a disc body (631) and a hemispherical body (632) integrally arranged at the lower end of the disc body (631).

7. The automatic resin solution adjusting device for a stereolithography 3D printer according to claim 6, characterized in that The automatic resin solution adjusting device for a stereolithography 3D printer further includes a guide block (11); The guide block (11) is triangular, and a plurality of the guide blocks (11) are arranged in the transition gap (3) and abut against the inner edge of the outer resin solution tank (2) at the lower part.

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