3D printing device for dynamic liquid crystal grating and its printing method

Abstract

The present invention discloses a 3D printing device for a dynamic liquid crystal grating and its printing method, which relates to the technical field of liquid crystal grating 3D printing devices. It includes a base and a liquid crystal grating arranged on the upper side of the base. A control box is provided at the rear side of the base. A first push rod is fixedly connected to the right side of the base. A first slider is slidably connected to the upper side of the base, and the first slider is fixedly connected to the output end of the first push rod. By providing a control box, a first solenoid valve, a second solenoid valve, a third solenoid valve, a laser heater, a first storage tank, a second storage tank, and a third storage tank, the first solenoid valve, the second solenoid valve, and the third solenoid valve automatically open the corresponding solenoid valves to convey materials according to the materials required for each sliced area, and the laser heater heats with different powers according to the melting points of the conveyed materials, which speeds up the 3D printing speed of the liquid crystal grating and achieves the effect of high 3D printing efficiency of the liquid crystal grating.

Description

Technical Field

[0001] The present invention relates to the technical field of liquid crystal grating 3D printing devices, and particularly to a 3D printing device for a dynamic liquid crystal grating and a printing method thereof. Background Technique

[0002] A liquid crystal grating is a structure that generates an effect through a liquid crystal material. Its principle is based on the orientation control of liquid crystal molecules and the polarization characteristics of light. Liquid crystal molecules are charged rod-shaped molecules. When the liquid crystal branches are arranged in an orderly manner, the direction and polarization state of light passing through can be controlled. The liquid crystal grating utilizes this characteristic to modulate and decompose light waves by arranging and controlling liquid crystal molecules.

[0003] 3D printing (3DP) is a kind of rapid prototyping technology, also known as additive manufacturing. It is a technology that constructs an object by layer-by-layer printing based on a digital model file and using powdered metal, plastic, or other bondable materials.

[0004] 3D printing is usually achieved by using a digital technology material printer. It is often used in the fields of mold manufacturing, industrial design, etc. to manufacture models, and then gradually used for the direct manufacturing of some products. There are already parts printed using this technology. This technology has applications in jewelry, footwear, industrial design, architecture, engineering and construction (AEC), automotive, aerospace, dental and medical industries, education, geographic information systems, civil engineering, firearms, and other fields.

[0005] However, when the existing liquid crystal gratings are 3D printed, due to the diversity of internal materials, 3D printing needs to be carried out in batches through multiple nozzles, resulting in numerous operation steps for liquid crystal grating 3D printing, thus slowing down the 3D printing speed of liquid crystal gratings. Moreover, the ejection ports are filled with dust due to long-term non-use and are not cleaned before use, resulting in excessive dust infiltration during the internal 3D printing of liquid crystal gratings, thus making the production of liquid crystal gratings unqualified. Therefore, a 3D printing device with high 3D printing efficiency and high dust removal efficiency for liquid crystal gratings is designed. Summary of the Invention

[0006] The purpose of the present invention is to provide a 3D printing device for a dynamic liquid crystal grating and a printing method thereof to solve the problems raised in the above background technique.

[0007] To solve the above technical problems, the present invention provides the following technical solutions: a 3D printing device for a dynamic liquid crystal grating and its printing method, including a base and a liquid crystal grating arranged on the upper side of the base. A control box is provided at the rear side of the base. A first push rod is fixedly connected to the right side of the base. A first slider is slidably connected to the upper side of the base. The first slider is fixedly connected to the output end of the first push rod. A second push rod is fixedly connected to the front side of the first slider. A second slider is slidably connected to the upper side of the first slider. The second slider is fixedly connected to the output end of the second push rod. A third slider is slidably connected to the right side of the second slider. A third push rod is fixedly connected to the upper side of the second slider. The output end of the third push rod is fixedly connected to the third slider;

[0008] A laser heater is fixedly connected to the right side of the third slider. The output end of the laser heater is fixedly connected to a nozzle. A first storage box, a second storage box, and a third storage box are evenly and fixedly connected to the outside of the nozzle. A laser through hole is provided in the middle of the inside of the nozzle. First feeding pipes, second feeding pipes, and third feeding pipes are also evenly provided in the inside of the nozzle. One end of the first feeding pipe is fixedly connected to the first storage box, and the other end of the first feeding pipe is fixedly connected to a first electromagnetic valve. One end of the second feeding pipe is fixedly connected to the second storage box, and the other end of the second feeding pipe is fixedly connected to a second electromagnetic valve. One end of the third feeding pipe is fixedly connected to the third storage box, and the other end of the third feeding pipe is fixedly connected to a third electromagnetic valve. The output ends of the first electromagnetic valve, the second electromagnetic valve, and the third electromagnetic valve communicate with the laser through hole;

[0009] A dust collection box is fixedly connected to the front side of the nozzle. An air pump is fixedly connected to the right side of the dust collection box. A rubber suction pipe is fixedly connected to the right side of the dust collection box. A dust collection chamber is provided in the inside of the dust collection box. A fixed clip is fixedly connected to the right side of the nozzle. The rubber suction pipe is limited by the fixed clip.

[0010] Electrode materials are provided in the first storage box. Transparent insulating materials are provided in the second storage box. Transparent materials are provided in the third storage box.

[0011] The installation angles of the first feeding pipe, the second feeding pipe, and the third feeding pipe are all inclined inwards at an angle of 45 degrees.

[0012] A first weight sensor is provided in the inside of the first storage box. A second weight sensor is provided in the inside of the second storage box. A third weight sensor is provided in the inside of the third storage box.

[0013] A positioning plate is fixedly connected to the upper right side of the base. Fourth push rods are respectively fixedly connected to the front and rear sides of the upper side of the base. The output end of each fourth push rod is fixedly connected to a pressing plate.

[0014] The liquid crystal grating includes a third electrode, a first transparent substrate, a second transparent substrate, a plurality of first electrodes, a plurality of second electrodes, an insulating layer, a first alignment layer, a second alignment layer, a sealant frame, and a liquid crystal layer. The third electrode is disposed on the upper side of the second transparent substrate. The second alignment layer is disposed on the upper side of the third electrode. The liquid crystal layer is disposed on the upper side of the second alignment layer. The sealant frame is disposed on the upper side of the third electrode. A plurality of the second electrodes are disposed inside the first alignment layer. The insulating layer is disposed on the upper side of the first alignment layer. A plurality of the first electrodes are disposed inside the insulating layer. The first transparent substrate is disposed on the upper side of the insulating layer.

[0015] A moving module, a feeding module, a heating module, a clamping module, a detection module, and a dust removal module are provided inside the control box. The moving module, the feeding module, the heating module, the clamping module, the detection module, and the dust removal module are connected to each other by signal.

[0016] The moving module is connected to a first push rod, a second push rod, and a third push rod by signal. The feeding module is connected to a first solenoid valve, a second solenoid valve, and a third solenoid valve by signal. The heating module is connected to a laser heater by signal. The clamping module is connected to a fourth push rod by signal. The detection module is connected to a first weight sensor, a second weight sensor, and a third weight sensor by signal. The dust removal module is connected to an air pump by signal.

[0017] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: By providing a control box, a first solenoid valve, a second solenoid valve, a third solenoid valve, a laser heater, a first storage box, a second storage box, and a third storage box, the first solenoid valve, the second solenoid valve, and the third solenoid valve automatically open the corresponding solenoid valves to convey materials according to the materials required for each slicing area. The laser heater heats with different powers according to the melting points of the conveyed materials, which speeds up the 3D printing speed of the liquid crystal grating and achieves the effect of high 3D printing efficiency of the liquid crystal grating.

[0018] By providing an air pump and a timing unit, the length of the idle time of the air pump is recorded by the timing unit, so as to judge the amount of dust accumulated inside the nozzle, automatically adjust the working efficiency of the air pump, and perform dust removal to different degrees inside the nozzle, achieving the effect of high dust removal efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The drawings are used to provide a further understanding of the present invention and constitute a part of the specification. They are used together with the embodiments of the present invention to explain the present invention and do not constitute a limitation to the present invention. In the drawings:

[0020] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2It is the top view of the overall structure of the present invention;

[0022] Figure 3 It is the present invention Figure 1 An enlarged schematic view of area A;

[0023] Figure 4 It is the cross-sectional view of the nozzle of the present invention;

[0024] Figure 5 It is the structural schematic diagram of the liquid crystal grating of the present invention;

[0025] In the figure: 1. Base; 2. First slider; 3. First push rod; 4. Second push rod; 5. Second slider; 6. Third push rod; 7. Third slider; 8. Control box; 9. Laser heater; 10. Positioning plate; 11. First storage box; 12. Nozzle; 13. Third storage box; 14. Fixed clamp; 15. Rubber suction pipe; 16. Dust collection box; 17. Air pump; 18. Second storage box; 19. First solenoid valve; 20. Second solenoid valve; 21. Laser through hole; 22. Third solenoid valve; 23. First transparent substrate; 24. First electrode; 25. Insulating layer; 26. First alignment layer; 27. Second electrode; 28. Sealing rubber frame; 29. Second alignment layer; 30. Third electrode; 31. Second transparent substrate; 32. Liquid crystal layer; 33. Fourth push rod; 34. Pressing plate. Embodiment

[0026] The technical solution of the present invention will be further described in detail and non-limitingly below in conjunction with the preferred embodiments and their accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of them. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative work shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-5 , the present invention provides a technical solution: a 3D printing device for a dynamic liquid crystal grating, including a base 1 and a liquid crystal grating disposed on the upper side of the base. A control box 8 is provided at the rear side of the base 1. A first push rod 3 is fixedly connected to the right side of the base 1. A first slider 2 is slidably connected to the upper side of the base 1. The first slider 2 is fixedly connected to the output end of the first push rod 3. A second push rod 4 is fixedly connected to the front side of the first slider 2. A second slider 5 is slidably connected to the upper side of the first slider 2. The second slider 5 is fixedly connected to the output end of the second push rod 4. A third slider 7 is slidably connected to the right side of the second slider 5. A third push rod 6 is fixedly connected to the upper side of the second slider 5. The output end of the third push rod 6 is fixedly connected to the third slider 7.

[0028] On the right side of the third slider 7, a laser heater 9 is fixedly connected. The output end of the laser heater 9 is fixedly connected with a nozzle 12. Uniformly fixedly connected to the outside of the nozzle 12 are a first storage box 11, a second storage box 18, and a third storage box 13. In the middle of the interior of the nozzle 12, there is a laser through-hole 21. Inside the nozzle 12, there are also uniformly arranged a first material delivery pipe, a second material delivery pipe, and a third material delivery pipe. One end of the first material delivery pipe is fixedly connected with the first storage box 11, and the other end of the first material delivery pipe is fixedly connected with a first electromagnetic valve 19. One end of the second material delivery pipe is fixedly connected with the second storage box 18, and the other end of the second material delivery pipe is fixedly connected with a second electromagnetic valve 20. One end of the third material delivery pipe is fixedly connected with the third storage box 13, and the other end of the third material delivery pipe is fixedly connected with a third electromagnetic valve 22. The output ends of the first electromagnetic valve 19, the second electromagnetic valve 20, and the third electromagnetic valve 22 are all in communication with the laser through-hole 21.

[0029] Specifically, the telescoping of the output end of the first push rod 3 is used to drive the nozzle 12 to move left and right. The extension of the output end of the second push rod 4 is used to drive the nozzle 12 to move forward and backward. The extension of the output end of the third push rod 6 is used to drive the nozzle 12 to move up and down. The opening of the first electromagnetic valve 19 is used to convey the material inside the first material delivery pipe to the inside of the laser through-hole 21. The opening of the second electromagnetic valve 20 is used to convey the material inside the second material delivery pipe to the inside of the laser through-hole 21. The opening of the third electromagnetic valve 22 is used to convey the material inside the third material delivery pipe to the inside of the laser through-hole 21. The laser heater 9 focuses the light beam by utilizing the high energy, high density, and high monochromaticity of the laser, gathers the light at a small point, forms a high-temperature area, locally or integrally heats the material, and finally ejects it from the output end of the nozzle 12.

[0030] A dust collection box 16 is fixedly connected to the front side of the nozzle 12. An air pump 17 is fixedly connected to the right side of the dust collection box 16. A rubber suction pipe 15 is fixedly connected to the right side of the dust collection box 16. Inside the dust collection box 16, there is a dust collection chamber. A fixed clip 14 is fixedly connected to the right side of the nozzle 12, and the rubber suction pipe 15 is limited by the fixed clip 14.

[0031] Specifically, the air pump 17 is used to suck the dust drawn in through the input port of the rubber suction pipe 15 into the dust collection box 16 for storage.

[0032] The first storage box 11 contains electrode materials, the second storage box 18 contains transparent insulating materials, and the third storage box 13 contains transparent materials.

[0033] The installation angles of the first material delivery pipe, the second material delivery pipe, and the third material delivery pipe are all inclined inward at an angle of 45 degrees.

[0034] The interior of the first storage box 11 is provided with a first weight sensor, the interior of the second storage box 18 is provided with a second weight sensor, and the interior of the third storage box 13 is provided with a third weight sensor.

[0035] Specifically, the first weight sensor is used to measure the weight value of the material inside the first storage box 11, convert it into an electrical signal and send it to the control box 8. The second weight sensor is used to measure the weight value of the material inside the second storage box 18, convert it into an electrical signal and send it to the control box 8. The third weight sensor is used to measure the weight value of the material inside the third storage box 13, convert it into an electrical signal and send it to the control box 8, so as to monitor the material quantity in a timely manner.

[0036] A positioning plate 10 is fixedly connected to the upper right side of the base 1, and fourth push rods 33 are fixedly connected to the front and rear sides of the upper side of the base 1 respectively. A pressing plate 34 is fixedly connected to the output end of each fourth push rod 33.

[0037] Specifically, the extension of the output end of the fourth push rod 33 is used to control the pressing plate 34 to clamp the second transparent substrate 31.

[0038] The liquid crystal grating includes a third electrode 30, a first transparent substrate 23, a second transparent substrate 31, a plurality of first electrodes 24, a plurality of second electrodes 27, an insulating layer 25, a first alignment layer 26, a second alignment layer 29, a sealant frame 28, and a liquid crystal layer 32. The third electrode 30 is disposed on the upper side of the second transparent substrate 31. The second alignment layer 29 is disposed on the upper side of the third electrode 30. The liquid crystal layer 32 is disposed on the upper side of the second alignment layer 29. The sealant frame 28 is disposed on the upper side of the third electrode 30. A plurality of second electrodes 27 are disposed inside the first alignment layer 26. The insulating layer 25 is disposed on the upper side of the first alignment layer 26. A plurality of first electrodes 24 are disposed inside the insulating layer 25. The first transparent substrate 23 is disposed on the upper side of the insulating layer 25.

[0039] A moving module, a material feeding module, a heating module, a clamping module, a detection module, and a dust removal module are provided inside the control box 8. The material feeding module is signal-connected to the moving module and the heating module.

[0040] The moving module is signal-connected to the first push rod 3, the second push rod 4, and the third push rod 6. The material feeding module is signal-connected to the first solenoid valve 19, the second solenoid valve 20, and the third solenoid valve 22. The heating module is signal-connected to the laser heater 9. The clamping module is signal-connected to the fourth push rod 33. The detection module is signal-connected to the first weight sensor, the second weight sensor, and the third weight sensor. The dust removal module is signal-connected to the air pump 17.

[0041] It includes the following steps:

[0042] S1: The staff uses 3D drawing software to draw a three-dimensional solid diagram of the liquid crystal grating, and then performs slicing processing on the three-dimensional solid diagram;

[0043] S2: The staff starts the dust removal module and controls the air pump 17 to perform dust removal with different powers inside the injection nozzle 12 according to the idle time of the air pump 17.

[0044] Specifically, a timing unit is provided inside the air pump 17. It starts recording time when the air pump 17 is turned off and stops recording time when the air pump 17 is turned on. According to the length of the recorded time, it judges the amount of dust accumulated inside the injection nozzle 12. The longer the idle time of the air pump 17, the more dust is inside the injection nozzle 12; the shorter the idle time of the air pump 17, the less dust is inside the injection nozzle 12. Assume the power of the air pump 17 is divided into high power, normal power, and low power. When the time t detected by the timing unit satisfies t ≤ 12h, it indicates that a small amount of dust is accumulated inside the injection nozzle 12 at this time, and the air pump 17 starts with low power. The staff aligns the rubber suction pipe 15 with the inside of the injection nozzle 12 to perform low-efficiency dust removal inside the injection nozzle 12. When 12h < t ≤ 24h, it indicates that an appropriate amount of dust is accumulated inside the injection nozzle 12 at this time, and the air pump 17 starts with normal power. The staff aligns the rubber suction pipe 15 with the inside of the injection nozzle 12 to perform normal dust removal inside the injection nozzle 12. When t > 24h, it indicates that a large amount of dust is accumulated inside the injection nozzle 12 at this time, and the air pump 17 starts with high power. The staff aligns the rubber suction pipe 15 with the inside of the injection nozzle 12 to perform high-efficiency dust removal inside the injection nozzle 12. By setting the air pump 17 and the timing unit, according to the length of the idle time of the air pump 17 recorded by the timing unit, the amount of dust accumulated inside the injection nozzle 12 is judged, and the working efficiency of the air pump 17 is automatically adjusted to perform dust removal of different degrees inside the injection nozzle 12, achieving the effect of high dust removal efficiency.

[0045] S3: The staff places the second transparent substrate 31 on the base 1 and clamps and positions it.

[0046] S4: The moving module controls the movement of the injection nozzle 12 according to the sliced image of the liquid crystal grating. The feeding module automatically matches the materials according to the materials required for each sliced area. The heating module performs heating with different powers according to the melting points of the conveyed materials.

[0047] Specifically, assume that the melting point of the electrode material > the melting point of the transparent insulating material > the melting point of the transparent material. The power of the laser heater 9 is divided into high power, normal power, and low power. The greater the power of the laser heater 9, the higher the laser heating temperature it emits, and the lower the power of the laser heater 9, the lower the laser heating temperature it emits. According to the sliced view of the liquid crystal grating, the nozzle 12 moves left and right and back and forth through the expansion and contraction of the output ends of the first push rod 3 and the second push rod 4. First, 3D printing of the third electrode 30 is performed. Whenever the sliced view area of the third electrode 30 is reached, the first solenoid valve 19 is opened, and the electrode material flows out from the inside of the first storage box 11 and reaches the laser through-hole 21. Since the melting point of the electrode material is the highest, the heating module controls the high-power start of the laser heater 9 while the first solenoid valve 19 is opened to heat the electrode material at high power. The liquid electrode material flows out from the output end of the nozzle 12 to perform 3D printing on the third electrode 30. When the 3D printing of all areas of one sliced view of the third electrode 30 is completed, the output end of the third push rod 6 retracts, controlling the nozzle 12 to reach the next sliced view of the third electrode 30, and so on until the 3D printing of all sliced views of the third electrode 30 is completed. The output end of the third push rod 6 retracts, controlling the nozzle 12 to reach the sliced views of the second alignment layer 29 and the sealant frame 28. The nozzle 12 performs 3D printing on the second alignment layer 29 and the sealant frame 28. Whenever the sliced view area of the second alignment layer 29 and the sealant frame 28 is reached, the third solenoid valve 22 is opened, and the transparent material flows out from the inside of the third storage box 13 and reaches the laser through-hole 21. Since the melting point of the electrode material is the lowest, the heating module controls the low-power start of the laser heater 9 while the third solenoid valve 22 is opened to heat the electrode material at low power. The liquid transparent material flows out from the output end of the nozzle 12 to perform 3D printing on the second alignment layer 29 and the sealant frame 28. When the 3D printing of all areas of one sliced view of the second alignment layer 29 and the sealant frame 28 is completed, the output end of the third push rod 6 retracts, controlling the nozzle 12 to reach the next sliced view of the second alignment layer 29 and the sealant frame 28, and so on until the 3D printing of all sliced views of the second alignment layer 29 and the sealant frame 28 is completed. The output end of the third push rod 6 retracts, controlling the nozzle 12 to reach the sliced view of only the sealant frame 28. When the 3D printing of all areas of one sliced view of the sealant frame 28 is completed, the output end of the third push rod 6 retracts, controlling the nozzle 12 to reach the next sliced view of the sealant frame 28, and so on until the 3D printing of all sliced views of the sealant frame 28 is completed. The output end of the third push rod 6 retracts, controlling the nozzle 12 to reach the sliced views of the first alignment layer 26, the second electrode 27, and the sealant frame 28. Whenever the nozzle 12 reaches the sliced view area of the second electrode 27, other solenoid valves are closed and the first solenoid valve 19 is opened, and the laser heater 9 starts at high power. Whenever the nozzle 12 reaches the sliced view area of the first alignment layer 26 and the sealant frame 28, other solenoid valves are closed and the third solenoid valve 22 is opened, and the laser heater 9 starts at low power.The first alignment layer 26, the second electrode 27, and the sealing frame 28 are 3D printed in sequence until all the slices of the first alignment layer 26, the second electrode 27, and the sealing frame 28 are printed, the output end of the third push rod 6 is retracted, and the nozzle 12 is controlled to reach the slices of the insulating layer 25, the first electrode 24, and the sealing frame 28. Whenever the nozzle 12 reaches the slice area of ​​the first electrode 24, the other solenoid valves are closed and the first solenoid valve 19 is opened, and the laser heater 9 is started at high power. Whenever the nozzle 12 reaches the slice area of ​​the sealing frame 28, the other solenoid valves are closed and the third solenoid valve 22 is opened. The laser heater 9 is started at low power. Whenever the nozzle 12 reaches the slice area of ​​the insulating layer 25, due to the moderate melting point of the transparent insulating material, the heating module controls the laser heater 9 to start at normal power, the feeding module closes the other solenoid valves and opens the second solenoid valve 20, and the insulating layer 25, the first electrode 24, and the sealing frame 28 are 3D printed in sequence;

[0048] By providing a control box 8, a first solenoid valve 19, a second solenoid valve 20, a third solenoid valve 22, a laser heater 9, a first storage box, a second storage box, and a third storage box, the first solenoid valve 19, the second solenoid valve 20, and the third solenoid valve 22 automatically open the corresponding solenoid valves to convey the materials according to the materials required in each slicing area, and the laser heater 9 heats with different powers according to the melting point of the conveyed material, thereby accelerating the 3D printing speed of the liquid crystal grating and achieving the effect of high efficiency of the liquid crystal grating 3D printing.

[0049] S5: The staff installs the first transparent substrate 23, injects the liquid crystal into the liquid crystal layer 32, adds inert gas for pressurization, and seals the injection port with glue;

[0050] S6: Repeating S3 to S5 can continuously perform high-efficiency 3D printing on the liquid crystal grating.

[0051] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0052] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them. Although the present invention has been described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A 3D printing device for a dynamic liquid crystal grating, characterized in that: The invention comprises a base (1) and a liquid crystal grating arranged on the upper side of the base, wherein a control box (8) is arranged on the rear side of the base (1), a first push rod (3) is fixedly connected to the right side of the base (1), a first slider (2) is slidably connected to the upper side of the base (1), the first slider (2) is fixedly connected to the output end of the first push rod (3), a second push rod (4) is fixedly connected to the front side of the first slider (2), a second slider (5) is slidably connected to the upper side of the first slider (2), the second slider (5) is fixedly connected to the output end of the second push rod (4), a third slider (7) is slidably connected to the right side of the second slider (5), a third push rod (6) is fixedly connected to the upper side of the second slider (5), and the output end of the third push rod (6) is fixedly connected to the third slider (7); The right side of the third slider (7) is fixedly connected to a laser heater (9), the output end of the laser heater (9) is fixedly connected to a nozzle (12), the outer side of the nozzle (12) is evenly fixedly connected to a first storage box (11), a second storage box (18), and a third storage box (13), a laser through hole (21) is provided in the middle of the nozzle (12), and the nozzle (12) is also evenly provided with a first material delivery pipe, a second material delivery pipe, and a third material delivery pipe, one end of the first material delivery pipe is fixedly connected to the first storage box (11), the other end of the first material delivery pipe is fixedly connected to a first solenoid valve (19), one end of the second material delivery pipe is fixedly connected to the second storage box (18), the other end of the second material delivery pipe is fixedly connected to a second solenoid valve (20), one end of the third material delivery pipe is fixedly connected to the third storage box (13), the other end of the third material delivery pipe is fixedly connected to a third solenoid valve (22), and the output ends of the first solenoid valve (19), the second solenoid valve (20), and the third solenoid valve (22) are all in communication with the laser through hole (21); A dust collecting box (16) is fixedly connected to the front side of the nozzle (12), an air pump (17) is fixedly connected to the right side of the dust collecting box (16), a rubber suction tube (15) is fixedly connected to the right side of the dust collecting box (16), a dust collecting chamber is provided inside the dust collecting box (16), a fixing clamp (14) is fixedly connected to the right side of the nozzle (12), and the rubber suction tube (15) is limited by the fixing clamp (14).

2. A 3D printing device for a dynamic liquid crystal grating according to claim 1, characterized in that: The first storage box (11) has an electrode material inside, the second storage box (18) has a transparent insulating material inside, and the third storage box (13) has a transparent material inside.

3. The 3D printing device of a dynamic liquid crystal grating according to claim 2, characterized in that: The installation angles of the first material conveying pipe, the second material conveying pipe and the third material conveying pipe are all inclined inwards at 45 degrees.

4. The 3D printing device of a dynamic liquid crystal grating according to claim 3, characterized in that: A first weight sensor is provided inside the first storage box (11), a second weight sensor is provided inside the second storage box (18), and a third weight sensor is provided inside the third storage box (13).

5. The 3D printing device of a dynamic liquid crystal grating according to claim 4, characterized in that: A positioning plate (10) is fixedly connected to the right upper side of the base (1), and fourth push rods (33) are fixedly connected to the front and rear upper sides of the base (1), respectively. The output end of each fourth push rod (33) is fixedly connected to a pressure plate (34).

6. A 3D printing device for a dynamic liquid crystal grating according to claim 5, characterized in that: The liquid crystal grating comprises a third electrode (30), a first transparent substrate (23), a second transparent substrate (31), a plurality of first electrodes (24), a plurality of second electrodes (27), an insulating layer (25), a first alignment layer (26), a second alignment layer (29), a sealing frame (28), and a liquid crystal layer (32); the third electrode (30) is arranged on the upper side of the second transparent substrate (31); the second alignment layer (29) is arranged on the upper side of the third electrode (30); the liquid crystal layer (32) is arranged on the upper side of the second alignment layer (29); the sealing frame (28) is arranged on the upper side of the third electrode (30); a plurality of the second electrodes (27) are arranged inside the first alignment layer (26); the insulating layer (25) is arranged on the upper side of the first alignment layer (26); a plurality of the first electrodes (24) are arranged inside the insulating layer (25); and the first transparent substrate (23) is arranged on the upper side of the insulating layer (25).

7. A 3D printing device for a dynamic liquid crystal grating according to claim 6, characterized in that: The control box (8) is provided with a moving module, a feeding module, a heating module, a clamping module, a detection module, and a dust removal module inside, and the moving module, the feeding module, the heating module, the clamping module, the detection module, and the dust removal module are connected to each other by signals.

8. A 3D printing device for a dynamic liquid crystal grating according to claim 7, characterized in that: The moving module is connected to the first push rod (3), the second push rod (4), and the third push rod (6) by signal; the feeding module is connected to the first solenoid valve (19), the second solenoid valve (20), and the third solenoid valve (22) by signal; the heating module is connected to the laser heater (9) by signal; the clamping module is connected to the fourth push rod (33) by signal; the detection module is connected to the first weight sensor, the second weight sensor, and the third weight sensor by signal; and the dust removal module is connected to the air pump (17) by signal.

9. The printing method of a 3D printing device of a dynamic liquid crystal grating according to claim 8, characterized in that: The following steps are involved: S1: The staff draws a three-dimensional image of the liquid crystal grating using 3D drawing software, and then slices the three-dimensional image; S2: The staff starts the dust removal module and controls the air pump (17) to perform dust removal of different powers inside the nozzle (12) according to the idle time of the air pump (17); S3: The staff places the second transparent substrate (31) on the base (1) and clamps and positions it; S4: the moving module controls the movement of the nozzle (12) according to the slice diagram of the liquid crystal grating, the feeding module automatically matches the material according to the material required for each slicing area, and the heating module performs heating with different powers according to the melting point of the delivered material; S5: The staff installs the first transparent substrate (23), injects liquid crystal into the liquid crystal layer (32), adds inert gas for pressurization, and seals the injection port with glue; S6: Repeating S3 to S5 can continuously perform high-efficiency 3D printing on the liquid crystal grating.

Images