Photocuring 3D printing equipment

Abstract

The embodiment of the utility model provides photocuring 3D printing equipment. The photocuring 3D printing equipment comprises a rack, a driving mechanism, a printing platform and a recycling and cleaning mechanism, the rack is provided with a plurality of liquid tanks used for containing printing materials. The driving mechanism is arranged on the rack. The printing platform is in transmission connection with the driving mechanism and used for bearing a printing sample. And the recycling and cleaning mechanism is used for recycling printing materials on the surfaces of the printing platform and the printing sample and cleaning the printing platform and the printing sample when the printing platform leaves the liquid tank. According to the technical scheme of the embodiment of the utility model, uncured printing materials on the surfaces of the printing platform and the printing sample are recycled, the loss of the printing materials is reduced, the printing platform and the printing sample are cleaned, and cross contamination of the printing materials in different liquid tanks is prevented.

Description

Technical Field

[0001] The utility model relates to the technical field of printing, in particular to a light-curing 3D printing device. Background Art

[0002] With the development of 3D printing technology, 3D printing equipment can now use a variety of different printing materials to print samples with more complex structures or better performance. However, when switching printing materials, the light-curing 3D printing equipment consumes a lot of printing materials, and different printing materials are easily mixed, resulting in cross-contamination between printing materials, affecting the quality of the samples. Utility Model Content

[0003] The embodiment of the utility model provides a light-curing 3D printing device, which is intended to recycle uncured printing materials on the surface of a printing platform and a printed sample, reduce the loss of printing materials, and clean the printing platform and the printed sample to prevent cross contamination of printing materials.

[0004] The present invention provides a light-curing 3D printing device, comprising:

[0005] A frame, provided with a plurality of liquid tanks for accommodating printing materials;

[0006] A driving mechanism, arranged on the frame;

[0007] A printing platform, which is drivingly connected to the driving mechanism, and is used to carry a printing sample; and

[0008] A recovery and cleaning mechanism is used to recover the printing material on the printing platform and the printing sample surface and clean the printing platform and the printing sample when the printing platform leaves the liquid tank.

[0009] In the light-curing 3D printing device of the present invention, the recovery and cleaning mechanism recovers the printing material on the surface of the printing platform and the printed sample by exhausting or blowing air.

[0010] In the light-curing 3D printing device of the present invention, the two adjacent liquid tanks are respectively a first liquid tank filled with a first printing material and a second liquid tank filled with a second printing material;

[0011] The recovery and cleaning mechanism includes a first vacuum nozzle and a second vacuum nozzle disposed between the first liquid tank and the second liquid tank;

[0012] The first vacuum nozzle is used to suck the first printing material on the printing platform and the surface of the printing sample when the printing platform leaves the first liquid tank;

[0013] The second vacuum suction nozzle is used to suck the second printing material on the surface of the printing platform and the printing sample when the printing platform leaves the second liquid tank.

[0014] In the light-curing 3D printing device of the present invention, the recycling and cleaning mechanism also includes:

[0015] a first gas-liquid separator, wherein the first gas-liquid separator is provided with a first cylinder and a first one-way valve, the first cylinder is connected with the first vacuum suction nozzle and the negative pressure generating assembly, and the first one-way valve is provided with a first valve flap;

[0016] a second gas-liquid separator, wherein the second gas-liquid separator is provided with a second cylinder and a second one-way valve, the second cylinder is connected with the second vacuum nozzle and the negative pressure generating assembly, and the second one-way valve is provided with a second valve flap;

[0017] a first liquid storage container; and

[0018] a second liquid storage container;

[0019] When the negative pressure generating assembly is in working state, the first cylinder or the second cylinder is in negative pressure state;

[0020] When the first cylinder is in a negative pressure state, the first valve flap is closed under the action of the negative pressure, the first one-way valve is in a closed state, and the first printing material entering the first cylinder through the first inlet is separated from the gas and accumulated in the first gas-liquid separator;

[0021] When the first cylinder is in a non-negative pressure state, the first valve flap is in an open state, the first gas-liquid separator and the first liquid storage container are connected, and the first printing material accumulated in the first gas-liquid separator enters the first liquid storage container under the action of gravity;

[0022] When the second cylinder is in a negative pressure state, the second valve flap is closed under the negative pressure, the second one-way valve is in a closed state, and the second printing material entering the second cylinder through the second inlet is separated from the gas and accumulated in the second gas-liquid separator;

[0023] When the second cylinder is in a non-negative pressure state, the second valve flap is in an open state, the second gas-liquid separator and the second liquid storage container are connected, and the second printing material accumulated in the second gas-liquid separator enters the second liquid storage container under the action of gravity.

[0024] In the light-curing 3D printing device of the utility model, the first reflux groove and the second reflux groove are further provided between the first liquid groove and the second liquid groove, the first reflux groove is connected to the first liquid groove, and the first vacuum nozzle is located in the first reflux groove;

[0025] The second reflux groove is located between the first reflux groove and the second liquid groove, the second reflux groove is connected to the second liquid groove, and the second vacuum nozzle is located in the second reflux groove.

[0026] In the light-curing 3D printing device of the present invention, the recycling and cleaning mechanism is provided with a cleaning tank for accommodating cleaning materials, and the cleaning wiping tank is provided between the first liquid tank and the second liquid tank;

[0027] The first vacuum nozzle is located between the cleaning tank and the first liquid tank, and the second vacuum nozzle is located between the cleaning tank and the second liquid tank;

[0028] The printing platform can be moved to the cleaning tank for cleaning after the first vacuum nozzle sucks the first printing material on the printing platform and the printing sample surface; or,

[0029] The printing platform can be moved to the cleaning tank for cleaning after the second vacuum suction nozzle sucks the second printing material on the printing platform and the surface of the printing sample.

[0030] In the light-curing 3D printing device of the utility model, the recycling and cleaning mechanism further includes a third vacuum nozzle and a fourth vacuum nozzle, the third vacuum nozzle is arranged between the cleaning tank and the second liquid tank, and the fourth vacuum nozzle is arranged between the cleaning tank and the first liquid tank;

[0031] The third vacuum nozzle or the fourth vacuum nozzle is used to absorb the cleaning material on the surface of the printing platform and the printing sample when the printing platform leaves the cleaning tank.

[0032] In the light-curing 3D printing device of the present invention, a third reflux groove is provided between the cleaning groove and the second liquid groove, the third reflux groove is connected to the cleaning groove, and the third vacuum nozzle is located in the third reflux groove;

[0033] A fourth reflux groove is provided between the cleaning groove and the first liquid groove, the fourth reflux groove is communicated with the cleaning groove, and the fourth vacuum suction nozzle is located in the fourth reflux groove.

[0034] In the light-curing 3D printing device of the present invention, the light-curing 3D printing device also includes a moving part, the cleaning tank and the multiple liquid tanks are arranged on the moving part, the moving part is movably connected to the frame and transmission-connected to the driving mechanism, and the moving part can move relative to the frame under the drive of the driving mechanism.

[0035] In the light-curing 3D printing device of the present invention, a light-transmitting area is provided on the bottom wall of the liquid tank, and a release film is provided in the light-transmitting area. The light-curing 3D printing device also includes a scraping component, which is used to scrape foreign matter on the surface of the release film.

[0036] The photocuring 3D printing device provided by the embodiment of the utility model is provided with a recovery and cleaning mechanism, and the printing material on the surface of the printing platform and the printed sample is recovered after the printing platform leaves the liquid tank filled with a printing material, so that the recovered printing material can be used for photocuring again, thereby reducing the loss of printing material, and facilitating the recovery and cleaning mechanism to clean the surface of the printing platform and the printed sample after the printing material is recovered, thereby preventing the printing platform and the printed sample from contaminating the liquid tank when they are immersed in the liquid tank filled with another printing material, thereby ensuring the quality of the printing material and the quality of the printed sample. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0038] Figure 1 A schematic diagram of the structure of a light-curing 3D printing device provided in an embodiment of the utility model;

[0039] Figure 2 A schematic structural diagram of a recovery and cleaning mechanism and a liquid tank provided in an embodiment of the utility model. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0041] See also Figure 1 to Figure 2The embodiment of the utility model provides a light-curing 3D printing device, including a frame 1, a driving mechanism 2, a printing platform 3 and a recycling and cleaning mechanism 4. The frame 1 is provided with a plurality of liquid tanks 11 for accommodating printing materials. The driving mechanism 2 is arranged on the frame 1. The printing platform 3 is connected to the driving mechanism 2 by transmission, and the printing platform 3 is used to carry the printing sample. The recycling and cleaning mechanism 4 is used to recycle the printing material on the printing platform 3 and the surface of the printing sample when the printing platform 3 leaves a liquid tank 11, and clean the printing platform 3 and the printing sample.

[0042] It can be understood that the printing material is a liquid printing material, and the printing materials contained in different liquid tanks 11 are different. The printed sample can be a semi-finished product or a finished product. After the printing platform 3 leaves one liquid tank 11, the recycling and cleaning mechanism 4 can recycle the printing material on the surface of the printing platform 3 and the printed sample, and after recycling the printing material, the recycling and cleaning mechanism 4 can also clean the surface of the printing platform 3 and the printed sample, and then the printing platform 3 and the printed sample can be immersed in another liquid tank 11 to continue the photocuring printing, or the surface of the printing platform 3 and the printed sample can be cleaned to complete the printing. Among them, different printing materials can be recycled into different containers and can be used for photocuring again, thereby reducing the loss of printing materials, and the printing platform 3 and the printed sample are immersed in another liquid tank 11 after cleaning to continue printing, which is conducive to preventing cross contamination between the liquid tanks 11, ensuring the quality of the printing materials, and thus ensuring the quality of the printed samples.

[0043] In some embodiments, the recovery and cleaning mechanism 4 recovers the printing material on the printing platform 3 and the surface of the printed sample by exhausting or blowing air. By exhausting or blowing air, the printing material on the printing platform 3 and the surface of the printed sample can be cleaned more efficiently, which is conducive to improving printing efficiency.

[0044] In an optional implementation, air may be blown toward the printing platform 3 and the printed sample to blow the printed material on the surface of the printing platform 3 and the printed sample into a container to recover the printed material.

[0045] In another optional embodiment, the two adjacent liquid tanks 11 are respectively a first liquid tank 11a containing a first printing material and a second liquid tank 11b containing a second printing material, and the recovery and cleaning mechanism 4 includes a first vacuum suction nozzle 42 and a second vacuum suction nozzle 43 disposed between the first liquid tank 11a and the second liquid tank 11b. The first vacuum suction nozzle 42 is used to suck the first printing material on the printing platform 3 and the surface of the printed sample when the printing platform 3 leaves the first liquid tank 11a. The second vacuum suction nozzle 43 is used to suck the second printing material on the surface of the printing platform 3 and the printed sample when the printing platform 3 leaves the second liquid tank 11b. By vacuum suction, it is convenient to collect the printing material and can prevent the printing material and the cleaning material from spreading.

[0046] It can be understood that there can be one or more first vacuum nozzles 42. When there is only one first vacuum nozzle 42, after the printing platform 3 leaves the first liquid tank 11a, the printing platform 3 can move in a serpentine shape relative to the first vacuum nozzle 42, so that the first vacuum nozzle 42 can fully extract the first printing material on the printing platform 3 and the surface of the printing sample. When there are multiple first vacuum nozzles 42, the multiple first vacuum nozzles 42 can be arranged in sequence in the direction perpendicular to the first liquid tank 11a to the second liquid tank 11b, such as Figure 2 As shown, the printing platform 3 is sequentially arranged in the front-to-back direction. If the printing platform 3 leaves the first liquid tank 11a and needs to be immersed in the second liquid tank 11b to continue printing, the printing platform 3 can move from the first liquid tank 11a to the second liquid tank 11b, and the first printing material on the surface of the printing platform 3 and the printing sample is fully extracted by using multiple first vacuum suction nozzles 42. The second vacuum suction nozzle 42 can be arranged with reference to the first vacuum suction nozzle 42, and will not be described in detail here.

[0047] It can be understood that the recovery and cleaning mechanism 4 includes a negative pressure generating component, which can be connected to the first vacuum suction nozzle 42 and the second vacuum suction nozzle 43 respectively, and provide negative pressure to the first vacuum suction nozzle 42 and the second vacuum suction nozzle 43 respectively, so that the first vacuum suction nozzle 42 can recover the first printing material on the surface of the printing platform 3 and the printing sample by suction, and the second vacuum suction nozzle 43 can clean the second printing material on the surface of the printing platform 3 and the printing sample by suction.

[0048] In some embodiments, the recovery and cleaning mechanism 4 further includes a first gas-liquid separator, a second gas-liquid separator, a first liquid storage container, and a second liquid storage container. The first gas-liquid separator is provided with a first cylinder and a first one-way valve, the first cylinder is connected to the first vacuum suction nozzle 42 and the negative pressure generating component, and the first one-way valve is provided with a first valve flap. The second gas-liquid separator is provided with a second cylinder and a second one-way valve, the second cylinder is connected to the second vacuum suction nozzle 43 and the negative pressure generating component, and the second one-way valve is provided with a second valve flap.

[0049] When the negative pressure generating assembly is in working state, the first cylinder or the second cylinder is in negative pressure state. When the first cylinder is in negative pressure state, the first valve flap is closed under the action of negative pressure, the first one-way valve is in closed state, the first gas-liquid separator is not connected with the first liquid storage container, the first printing material entering the first cylinder through the first inlet is separated from the gas, liquefied and accumulated in the first gas-liquid separator, until the first cylinder is in non-negative pressure state, the first valve flap is in open state, the first gas-liquid separator and the first liquid storage container are connected, the first printing material accumulated in the first gas-liquid separator enters the first liquid storage container under the action of gravity, and the first printing material and gas are separated and the first printing material is collected. When the second cylinder is in a negative pressure state, the second valve flap closes under the action of the negative pressure, the second one-way valve is in a closed state, the second gas-liquid separator and the second liquid storage container are not connected, and the second printing material entering the second cylinder through the second inlet is separated from the gas and liquefied and accumulated in the second gas-liquid separator. Until the second cylinder is in a non-negative pressure state, the second valve flap is in an open state, the second gas-liquid separator and the second liquid storage container are connected, and the second printing material accumulated in the second gas-liquid separator enters the second liquid storage container under the action of gravity, thereby realizing the separation of the second printing material and the gas and the collection of the second printing material.

[0050] Exemplarily, the first one-way valve and the second one-way valve may be duckbill valves, and the first valve flap and the second valve flap may be made of rubber or plastic.

[0051] In some embodiments, a first reflux groove 46 and a second reflux groove 47 are further provided between the first liquid groove 11a and the second liquid groove 11b, the first reflux groove 46 is communicated with the first liquid groove 11, and the first vacuum suction nozzle 42 is located at the first reflux groove 46. The second reflux groove 47 is located between the first reflux groove 46 and the second liquid groove 11b, the second reflux groove 47 is communicated with the second liquid groove 11b, and the second vacuum suction nozzle 43 is located at the second reflux groove 47. It can be understood that the first reflux groove 46 is provided adjacent to the first liquid groove 11a, and the first vacuum suction nozzle 42 is provided at the first reflux groove 46, so that when the printing platform 3 leaves the first liquid groove 11a, the printing platform 3 moves relative to the first liquid groove 11a and the first vacuum suction nozzle 42 to facilitate suction of the first printing material on the surface of the printing platform 3 and the printing sample, and the first printing material on the printing platform 3 and the printing sample can drip into the first reflux groove 46, so as to facilitate collection of the dripped first printing material for reuse, while preventing the first printing material from flowing freely. The second reflux groove 47 is arranged near the second liquid groove 11b, and the second vacuum suction nozzle 43 is arranged in the second reflux groove 47, so that when the printing platform 3 leaves the second liquid groove 11b, the printing platform 4 moves relative to the second liquid groove 11b and the first vacuum suction nozzle 32 to facilitate the suction of the second printing material on the surface of the printing platform 3 and the printing sample, and the second printing material on the printing platform 3 and the printing sample can drip into the second reflux groove 47, which is convenient for collecting the dripping second printing material for reuse, while preventing the second printing material from flowing freely.

[0052] Exemplarily, when a lifting-type light-curing 3D printing device is used, the first reflux groove 46 can be directly connected to the first liquid tank 11a, so that the first printing material collected in the first reflux groove 46 directly flows back into the liquid tank 11a. At this time, the bottom wall surface of the first reflux groove 46 can be an inclined surface, and the bottom wall surface is connected to the side wall surface of the first liquid tank 11a, so that the printing material dripping on the first reflux groove 46 slides from the inclined surface to the liquid tank 11a under the action of gravity. When a sinking light-curing 3D printing device is used, the first reflux groove 46 can be connected to the first liquid tank 11a through a pipeline, and a control valve can be provided on the pipeline. The control valve controls the connection between the first reflux groove 46 and the first liquid tank 11a, thereby preventing the printing material collected in the first reflux groove 46 from directly flowing back into the first liquid tank 11a, which is conducive to keeping the liquid level of the printing material in the first liquid tank 11a constant to ensure the printing quality of the printing device. Similarly, the configuration of the second reflow groove 47 may refer to the configuration of the first reflow groove 46 , and will not be described in detail herein.

[0053] In some embodiments, the recovery and cleaning mechanism 4 is provided with a cleaning tank 41 for accommodating cleaning materials, the cleaning tank 41 is provided between the first liquid tank 11a and the second liquid tank 11b, the first vacuum suction nozzle 42 is located between the cleaning tank 41 and the first liquid tank 11a, and the second vacuum suction nozzle 43 is located between the cleaning tank 41 and the second liquid tank 11b. The printing platform 3 can be moved to the cleaning tank 41 for cleaning after the first vacuum suction nozzle 42 absorbs the first printing material on the surface of the printing platform 3 and the printing sample. Alternatively, the printing platform 3 can be moved to the cleaning tank 41 for cleaning after the second vacuum suction nozzle 43 absorbs the second printing material on the surface of the printing platform 3 and the printing sample. It can be understood that the printing platform 3 and the printing sample can be immersed in the cleaning material in the cleaning tank 41 for cleaning. The immersion cleaning method is conducive to making the cleaning material fully contact with the printing platform 3 and the printing sample, ensuring that the areas to be cleaned can be cleaned by the cleaning material, and the immersion cleaning method is relatively gentle, which can reduce the impact on the printing platform and the printing sample.

[0054] In addition, after the recycling and cleaning mechanism 4 recovers the printing material on the surface of the printing platform 3 and the printing sample, the printing platform 3 can be immersed in the cleaning material in the cleaning tank 41 to clean the printing platform 3 and the printing sample. This method of recycling first and then cleaning is also conducive to the repeated use of the cleaning material, thereby reducing the loss of the cleaning material.

[0055] Specifically, the cleaning material is a liquid cleaning material, such as water or ethanol.

[0056] Of course, in other embodiments, the printing platform 3 and the printed sample may also be cleaned by flushing or wiping.

[0057] Furthermore, the recovery and cleaning mechanism 4 cleans the cleaning material on the printing platform and the printed sample surface by exhausting or blowing air. Cleaning the cleaning material on the printing platform 3 and the printed sample surface by exhausting or blowing air is beneficial to prevent the printing material in the liquid tank 11 from being contaminated when the printing platform 3 is immersed in the printing material of the liquid tank 11 and continues to print. Moreover, the exhausting or blowing air method can more efficiently clean the cleaning material on the printing platform 3 and the printed sample surface, which is beneficial to improving the printing efficiency.

[0058] Furthermore, the recovery and cleaning mechanism 4 further includes a third vacuum suction nozzle 44 and a fourth vacuum suction nozzle 45. The third vacuum suction nozzle 44 is disposed between the cleaning tank 41 and the second liquid tank 11b, and the fourth vacuum suction nozzle 45 is disposed between the cleaning tank 41 and the first liquid tank 11a. The third vacuum suction nozzle 44 or the fourth vacuum suction nozzle 45 is used to absorb the cleaning material on the surface of the printing platform 3 and the printed sample when the printing platform 3 leaves the cleaning tank 41. By vacuum suction, it is convenient to collect the cleaning material and can prevent the printing material and the cleaning material from spreading.

[0059] In addition, a third vacuum suction nozzle 44 is provided between the cleaning tank 41 and the first liquid tank 11a. When the printing platform 3 needs to be immersed in the first printing material of the first liquid tank 11a to continue printing, when the printing platform 3 leaves the cleaning tank 41, it can approach the first liquid tank 11a and the third vacuum suction nozzle 44, and the third vacuum suction nozzle 44 sucks the cleaning material on the surface of the printing platform 3 and the printed sample, so that after the suction is completed, the printing platform 3 can continue to approach the first liquid tank 11a, which is conducive to simplifying the approach of the printing platform 3 and the first liquid tank 11a and improving the printing efficiency. Similarly, a fourth vacuum suction nozzle 45 is provided between the cleaning tank 41 and the second liquid tank 11b, which can simplify the approach of the printing platform 3 and the second liquid tank 11b, which is conducive to improving the printing efficiency.

[0060] It can be understood that when the recovery and cleaning mechanism 4 is provided with a first vacuum nozzle 42, a second vacuum nozzle 43, a third vacuum nozzle 44 and a fourth vacuum nozzle 45, at least one first vacuum nozzle 42 and at least one fourth vacuum nozzle 45 are provided between the first liquid tank 11a and a cleaning tank 41, the fourth vacuum nozzle 45 is located between the first vacuum nozzle 42 and the cleaning tank 41, at least one second vacuum nozzle 43 and a third vacuum nozzle 44 are provided between the second liquid tank 11b and a cleaning tank 41, and the third vacuum nozzle 44 is located between the second vacuum nozzle 43 and the cleaning tank 41.

[0061] Exemplarily, the negative pressure generating component can be connected to the third vacuum nozzle 44 and the fourth vacuum nozzle 45 respectively to provide negative pressure to the third vacuum nozzle 44 and the fourth vacuum nozzle 45 respectively, so that the third vacuum nozzle 44 or the third vacuum nozzle 45 can recover the cleaning material on the surface of the printing platform 3 and the printed sample by suction.

[0062] Specifically, the recovery and cleaning mechanism 4 further includes a third gas-liquid separator, a fourth gas-liquid separator, a third liquid storage container, and a fourth liquid storage container. The third gas-liquid separator is provided with a third cylinder and a third one-way valve, the third cylinder is connected to the third vacuum suction nozzle 44 and the negative pressure generating component, and the third one-way valve is provided with a third valve flap. The fourth gas-liquid separator is provided with a fourth cylinder and a fourth one-way valve, the fourth cylinder is connected to the fourth vacuum suction nozzle 45 and the negative pressure generating component, and the fourth one-way valve is provided with a fourth valve flap.

[0063] When the negative pressure generating assembly is in working state, the third cylinder or the fourth cylinder is in negative pressure state. When the third cylinder is in negative pressure state, the third valve flap is closed under the action of negative pressure, the third one-way valve is in closed state, the third gas-liquid separator is not connected with the third liquid storage container, and the third cleaning material entering the third cylinder through the third inlet is separated from the gas and liquefied and accumulated in the third gas-liquid separator until the third cylinder is in non-negative pressure state, the third valve flap is in open state, the third gas-liquid separator and the third liquid storage container are connected, and the third cleaning material accumulated in the third gas-liquid separator enters the third liquid storage container under the action of gravity, so as to realize the separation of the third cleaning material and the gas and the collection of the third cleaning material. When the fourth cylinder is in a negative pressure state, the fourth valve flap closes under the action of the negative pressure, the fourth one-way valve is in a closed state, the fourth gas-liquid separator and the fourth liquid storage container are not connected, and the fourth cleaning material entering the fourth cylinder through the fourth inlet is separated from the gas and then liquefied and accumulated in the fourth gas-liquid separator. Until the fourth cylinder is in a non-negative pressure state, the fourth valve flap is in an open state, the fourth gas-liquid separator and the fourth liquid storage container are connected, and the fourth cleaning material accumulated in the fourth gas-liquid separator enters the fourth liquid storage container under the action of gravity, thereby realizing the separation of the fourth cleaning material and the gas and the collection of the fourth cleaning material.

[0064] Exemplarily, the third one-way valve and the fourth one-way valve may be duckbill valves, and the third valve flap and the fourth valve flap may be made of rubber or plastic.

[0065] In some embodiments, a third reflux groove 48 is provided between the cleaning groove 41 and the second liquid groove 11b, the third reflux groove 48 is connected to the cleaning groove 41, and the third vacuum suction nozzle 44 is located in the third reflux groove 48. A fourth reflux groove 49 is provided between the cleaning groove 41 and the first liquid groove 11a, the fourth reflux groove 49 is connected to the cleaning groove 41, and the fourth vacuum suction nozzle 45 is located in the fourth reflux groove 49. It can be understood that the third reflux groove 48 is arranged adjacent to the cleaning groove 41, and the third vacuum suction nozzle 44 is arranged in the third reflux groove 48, so that when the printing platform 3 leaves the cleaning groove 41, if the printing platform 4 needs to continue to be immersed in the first liquid groove 11a for printing, the printing platform 4 can move relative to the first liquid groove 11a and the third vacuum suction nozzle 42 to facilitate suction of the cleaning material on the surface of the printing platform 3 and the printed sample, and the cleaning material on the printing platform 3 and the printed sample can drip into the third reflux groove 48, so as to facilitate collection of the dripping cleaning material for reuse, while preventing the cleaning material from flowing freely.

[0066] For example, the third reflux tank 48 can be directly connected to the cleaning tank 41, so that the cleaning material collected in the third reflux tank 48 can directly flow back into the cleaning tank 41. It is worth noting that the third reflux tank 48 and the cleaning tank 41 can be arranged on the same container or on different containers. Figure 2As shown, the third reflux groove 48 is arranged in the first container 51, and the cleaning groove 41 is arranged on the second container 52. The side of the first container 51 provided with the third reflux groove 48 can be overlapped on the second container 52. The side wall of the third reflux groove 48 is provided with a notch, and the cleaning material collected by the third reflux groove 48 can flow out through the notch and drip into the cleaning groove 41. Specifically, the bottom surface of the third reflux groove 48 can be a plane or an inclined surface inclined toward the cleaning groove 41, which can be adjusted according to actual conditions and is not limited here. The setting of the fourth reflux groove 49 can refer to the setting of the third reflux groove 48, and will not be repeated here.

[0067] Exemplarily, when the first reflux groove 46 and the fourth reflux groove 49 are provided at the same time, as shown in FIG. Figure 2 As shown, the first container 51 may be provided with a first liquid tank 11a, a first reflux tank 46 and a fourth reflux tank 49, and the second container 52 is provided with a cleaning tank 41. The first reflux tank 46 and the fourth reflux tank 49 are located between the first liquid tank 11a and the cleaning tank 41, and the fourth reflux tank 49 is located between the first reflux tank 46 and the cleaning tank 41, and the first reflux tank 46 and the fourth reflux tank 49 are isolated from each other.

[0068] In some embodiments, the photocuring 3D printing device further includes a moving part 5, a cleaning tank 41 and a plurality of liquid tanks 11 are arranged on the moving part 5, the moving part 5 is movably connected to the frame 1 and is transmission-connected to the driving mechanism 2, and the moving part 5 can move relative to the frame under the drive of the driving mechanism 2. It can be understood that the photocuring 3D printing device further includes a light source mechanism. When a sinking photocuring 3D printing device is used, the printing platform 3 can be located between the liquid tank 11 and the light source mechanism, and when a lifting photocuring 3D printing device is used, the liquid tank 11 can be located between the light source mechanism and the printing platform 3. By making the liquid tank 11 movable relative to the frame 1 with the moving part 5, when the printing platform 3 switches the liquid tank 11, there is no need for the printing platform 3 and the light source mechanism to move together from one liquid tank 11 to the corresponding other liquid tank 11, which is convenient for the driving mechanism 2 to drive, and the cleaning tank 41 can move relative to the frame 1 with the moving part 5, which is conducive to reducing the movement of the printing platform and ensuring the printing quality of the printing platform.

[0069] Exemplarily, the moving member 5 can slide or rotate relative to the frame 1. Figure 1As shown, the moving member 5 can be a strip plate, the moving member 5 is connected to the slider, the frame 1 is provided with a slide rail extending in the left-right direction, the moving member 5 is slidably connected to the slide rail through the slider, so that the moving member 5 can slide in the left-right direction relative to the slide rail, then a plurality of liquid tanks 11 can be arranged at intervals in the left-right direction, and a cleaning tank 41 can be provided between any two adjacent liquid tanks 11, that is, the first liquid tank 11a and the second liquid tank 11b. Alternatively, the moving member 5 can be a circular plate, one side of which can be connected to a roller along its axis, and can be rotated around its own axis relative to the frame 1 through the roller, then a plurality of liquid tanks 11 can be arranged at intervals in the direction around the axis of the moving member 5, and a cleaning tank 41 can be provided between any two adjacent liquid tanks 11, that is, the first liquid tank 11a and the second liquid tank 11b.

[0070] Exemplarily, the first vacuum nozzle 42, the second vacuum nozzle 43, the third vacuum nozzle 44 and the fourth vacuum nozzle 45 can be arranged on the movable part 5, and the movable part 5 can drive the first vacuum nozzle 42, the second vacuum nozzle 43, the third vacuum nozzle 44 and the fourth vacuum nozzle 45 to move relative to the printing platform 3 to achieve sufficient suction.

[0071] In some embodiments, the bottom wall of the liquid tank 11 is provided with a light-transmitting area, and the light-transmitting area is provided with a release film 6. The light-curing 3D printing device further includes a scraping component 7, and the scraping component 7 is used to scrape off foreign matter on the surface of the release film 6. It can be understood that the surface of the release film 6 is prone to adhere to foreign matter. By providing the scraping component 7, the foreign matter on the surface of the release film 6 can be scraped off to prevent it from affecting the light curing of the printing material, thereby ensuring the printing quality of the printing device.

[0072] Furthermore, the scraping assembly 7 may include a transmission assembly and a scraper, and the transmission assembly is connected to the driving mechanism 2 so that the transmission assembly drives the scraper assembly to move in a direction parallel to the surface of the release film 6 under the drive of the driving mechanism 2, so that the scraper can move to the surface of the release film 6 and scrape off foreign matter thereon.

[0073] Exemplarily, the transmission assembly may include a synchronous belt and two pulleys, one pulley may be arranged on the movable part 5, and the other pulley may be connected to the driving mechanism 2 for transmission, and the synchronous belt is sleeved on the outer circumference of the two pulleys so that the pulleys rotate under the drive of the driving mechanism 2, driving the synchronous belt to move, so that the hanging part can move in a direction parallel to the surface of the release film 6.

[0074] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A light-curing 3D printing device, characterized in that: include: A frame, provided with a plurality of liquid tanks for accommodating printing materials; A driving mechanism, arranged on the frame; A printing platform, which is transmission-connected to the driving mechanism, and is used to carry a printed sample; as well as A recovery and cleaning mechanism is used to recover the printing material on the surface of the printing platform and the printing sample and clean the printing platform and the printing sample when the printing platform leaves the liquid tank.

2. The light-curing 3D printing device according to claim 1, characterized in that: The recycling and cleaning mechanism recycles the printing materials on the surface of the printing platform and the printing sample by means of exhausting or blowing air.

3. The light-curing 3D printing device according to claim 2, characterized in that: The two adjacent liquid tanks are respectively a first liquid tank filled with a first printing material and a second liquid tank filled with a second printing material; The recovery and cleaning mechanism includes a first vacuum nozzle and a second vacuum nozzle disposed between the first liquid tank and the second liquid tank; The first vacuum nozzle is used to suck the first printing material on the printing platform and the surface of the printing sample when the printing platform leaves the first liquid tank; The second vacuum suction nozzle is used to suck the second printing material on the surface of the printing platform and the printing sample when the printing platform leaves the second liquid tank.

4. The light-curing 3D printing device according to claim 3, characterized in that: The recycling and cleaning mechanism also includes: a first gas-liquid separator, wherein the first gas-liquid separator is provided with a first cylinder and a first one-way valve, the first cylinder is connected with the first vacuum suction nozzle and the negative pressure generating component, and the first one-way valve is provided with a first valve flap; A second gas-liquid separator, wherein the second gas-liquid separator is provided with a second cylinder and a second one-way valve, the second cylinder is connected with the second vacuum nozzle and the negative pressure generating assembly, and the second one-way valve is provided with a second valve flap; a first liquid storage container; and a second liquid storage container; When the negative pressure generating assembly is in working state, the first cylinder or the second cylinder is in negative pressure state; When the first cylinder is in a negative pressure state, the first valve flap is closed under the action of the negative pressure, the first one-way valve is in a closed state, and the first printing material entering the first cylinder through the first inlet is separated from the gas and accumulated in the first gas-liquid separator; When the first cylinder is in a non-negative pressure state, the first valve flap is in an open state, the first gas-liquid separator and the first liquid storage container are connected, and the first printing material accumulated in the first gas-liquid separator enters the first liquid storage container under the action of gravity; When the second cylinder is in a negative pressure state, the second valve flap is closed under the negative pressure, the second one-way valve is in a closed state, and the second printing material entering the second cylinder through the second inlet is separated from the gas and accumulated in the second gas-liquid separator; When the second cylinder is in a non-negative pressure state, the second valve flap is in an open state, the second gas-liquid separator and the second liquid storage container are connected, and the second printing material accumulated in the second gas-liquid separator enters the second liquid storage container under the action of gravity.

5. The light-curing 3D printing device according to claim 3, characterized in that: A first reflux groove and a second reflux groove are further provided between the first liquid groove and the second liquid groove, the first reflux groove is connected to the first liquid groove, and the first vacuum nozzle is located in the first reflux groove; The second reflux groove is located between the first reflux groove and the second liquid groove, the second reflux groove is connected to the second liquid groove, and the second vacuum nozzle is located in the second reflux groove.

6. The light-curing 3D printing device according to claim 3, characterized in that: The recycling and cleaning mechanism is provided with a cleaning tank for accommodating cleaning materials, and the cleaning tank is arranged between the first liquid tank and the second liquid tank; The first vacuum nozzle is located between the cleaning tank and the first liquid tank, and the second vacuum nozzle is located between the cleaning tank and the second liquid tank; The printing platform can be moved to the cleaning tank for cleaning after the first vacuum nozzle sucks the first printing material on the printing platform and the printing sample surface; or, The printing platform can be moved to the cleaning tank for cleaning after the second vacuum suction nozzle sucks the second printing material on the printing platform and the surface of the printing sample.

7. The light-curing 3D printing device according to claim 6, characterized in that: The recycling and cleaning mechanism further includes a third vacuum nozzle and a fourth vacuum nozzle, wherein the third vacuum nozzle is disposed between the cleaning tank and the second liquid tank, and the fourth vacuum nozzle is disposed between the cleaning tank and the first liquid tank; The third vacuum nozzle or the fourth vacuum nozzle is used to absorb the cleaning material on the surface of the printing platform and the printing sample when the printing platform leaves the cleaning tank.

8. The light-curing 3D printing device according to claim 7, characterized in that: A third reflux groove is provided between the cleaning groove and the second liquid groove, the third reflux groove is communicated with the cleaning groove, and the third vacuum nozzle is located in the third reflux groove; A fourth reflux groove is provided between the cleaning groove and the first liquid groove, the fourth reflux groove is communicated with the cleaning groove, and the fourth vacuum suction nozzle is located in the fourth reflux groove.

9. The light-curing 3D printing device according to claim 6, characterized in that: The photocuring 3D printing device also includes a moving part, the cleaning tank and the plurality of liquid tanks are arranged on the moving part, the moving part is movably connected to the frame and is transmission-connected to the driving mechanism, and the moving part can move relative to the frame under the drive of the driving mechanism.

10. The light-curing 3D printing device according to any one of claims 1 to 9, characterized in that: The bottom wall of the liquid tank is provided with a light-transmitting area, and the light-transmitting area is provided with a release film. The light-curing 3D printing device also includes a scraping component, and the scraping component is used to scrape foreign matter on the surface of the release film.

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