Ceramic part photocuring 3D printing equipment

Abstract

The invention provides ceramic part photocuring 3D printing equipment which comprises a forming cylinder system, an injection pump system and a storage type scraper, the forming cylinder system is located below the storage type scraper, the forming cylinder system comprises an upper mounting plate, a sealing piston and a forming cylinder, the sealing piston is arranged in the forming cylinder and can move up and down in the vertical direction, and the injection pump system is arranged in the upper mounting plate. The upper mounting plate is mounted on the periphery of the upper end of the forming cylinder, a concave space is formed between the upper end face of the sealing piston and the top end of the inner circumference of the forming cylinder in the vertical direction, and the injection pump system is located below the forming cylinder system and can inject liquid to the upper end face of the sealing piston and enable the liquid level to be flush with the upper end face of the upper mounting plate. And after the liquid is injected, the material storage type scraper can inject the material on the upper end face of the upper mounting plate and the liquid level of the liquid and scrape the material for printing. According to the invention, the problem that a large amount of slurry is needed during 3D printing of a large-size ceramic component can be solved, and the problem that the printing liquid level is poor in stability can also be solved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and in particular to a photocuring 3D printing device for ceramic parts. Background Art

[0002] Advanced ceramics have excellent properties such as high strength, wear resistance, corrosion resistance, high temperature resistance, low density and insulation, and are widely used in aerospace, semiconductor manufacturing, precision measurement and other fields. The preparation technology of large-scale complex structure ceramic components has broad application prospects in aerospace, large-scale mechanical equipment and other fields. Advanced ceramic components are developing in the direction of large size and complex shape. The traditional preparation process of large-scale complex precision ceramic components requires the design and preparation of a large number of large molds, which is costly and has a long cycle. The assembly and cumulative errors after parting and preparation are large. Light-curing 3D printing ceramic technology can realize free design and integrated forming of complex structures, but a large amount of slurry is required to prepare large or ultra-thick components, and controlling the liquid surface stability of the printed slurry layer is also another problem.

[0003] In order to save slurry and achieve stable control of the printing liquid level, the current method of forming ceramic components by bottom exposure-upper pull-up printing is generally adopted. This forming method greatly reduces the amount of slurry used, and also avoids the problem of unstable slurry level in the printing area caused by too thick slurry layer. However, this process is effective in preparing small-sized ceramic components, but when preparing large-sized / ultra-thick parts, problems such as the detachment of the forming table and the printed blank and the detachment of the release film and the cured layer often occur. The problems exposed by the bottom exposure-upper pull-up printing method of photocuring 3D printing when printing large-sized ceramic components have greatly limited the application of this technology in the field of large-sized complex components. A new photocuring 3D printing method and equipment are urgently needed to solve the photocuring additive manufacturing needs of large-sized complex ceramic components.

[0004] Since the existing technology has technical problems such as large amount of slurry used in the photocuring 3D printing process of large-scale complex structure ceramic components, the present invention studies and designs a photocuring 3D printing device for ceramic components. Summary of the invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect of large amount of slurry used in the photocuring 3D printing process of large-sized and complex structure ceramic components in the prior art, thereby providing a photocuring 3D printing device for ceramic components.

[0006] In order to solve the above problems, the present invention provides a photocuring 3D printing device for ceramic parts, which comprises:

[0007] A forming cylinder system, an injection pump system and a storage-type scraper, wherein the forming cylinder system is located below the storage-type scraper, the forming cylinder system comprises an upper mounting plate, a sealing piston and a forming cylinder, the sealing piston is arranged in the forming cylinder and can move up and down in a vertical direction, the upper mounting plate is mounted on the outer periphery of the upper end of the forming cylinder, the upper end face of the sealing piston has a recessed space in the vertical direction from the top end of the inner periphery of the forming cylinder, the injection pump system is located below the forming cylinder system, and can inject liquid into the upper end face of the sealing piston and can make the liquid level flush with the upper end face of the upper mounting plate, and after the liquid is injected, the storage-type scraper can inject material on the upper end face of the upper mounting plate and the liquid level and scrape the material for printing.

[0008] In some embodiments,

[0009] The density of the liquid is greater than the density of the material injected by the storage scraper, and the liquid does not chemically react with the material. After the storage scraper injects the material and prints a layer of product, the sealing piston descends a preset distance in the forming cylinder, and then the injection pump system injects a preset amount of liquid toward the upper end surface of the sealing piston to always keep the liquid level flush with the upper end surface of the upper mounting plate, and then continues to inject and scrape the material on the upper end surface of the upper mounting plate and the liquid level through the storage scraper for printing.

[0010] In some embodiments,

[0011] The forming cylinder system also includes a liquid inlet and outlet pipeline and a liquid inlet and outlet port, wherein the liquid inlet and outlet port is located at the lower end of the liquid inlet and outlet pipeline, and the liquid inlet and outlet port is connected to the injection pump system, so that the injection pump system can inject liquid into the recessed space above the sealing piston through the liquid inlet and outlet pipeline.

[0012] In some embodiments,

[0013] It also includes a Z-axis drive motor, a guide piston and a connecting rod. The Z-axis drive motor is connected to the sealing piston to drive the sealing piston to reciprocate in the forming cylinder. The forming cylinder is provided with a guide piston. The connecting rod is provided between the sealing piston and the guide piston. The guide piston, the connecting rod and the sealing piston are connected as a whole and move up and down as a whole in the forming cylinder.

[0014] In some embodiments,

[0015] A filter is also arranged between the sealing piston and the guide piston. The sealing piston is provided with mounting holes extending from top to bottom. A filter screen is arranged at the upper end of the mounting hole. The filter screen is connected with the filter through the mounting hole. The filter is connected with the upper end of the inlet and outlet liquid pipelines so as to filter the liquid injected by the injection pump system. The liquid filtered through the filter screen is conducted into the upper end surface of the sealing piston.

[0016] In some embodiments,

[0017] A lower mounting plate is also provided at the lower end of the forming cylinder, and the inlet and outlet liquid pipelines pass through the lower mounting plate and the guide piston in sequence upward to guide the liquid into the filter, and the Z-axis drive motor also passes through the lower mounting plate and the guide piston in sequence upward and is connected to the sealing piston.

[0018] In some embodiments,

[0019] The injection pump system includes an injection pump drive motor, a screw, an injection pump piston, a liquid barrel, a push plate and an inlet and outlet liquid nozzle. The injection pump drive motor and the screw can drive the screw to rotate. The screw passes through the push plate and cooperates with the push plate thread so that the push plate can be driven to reciprocate by the rotation of the screw. One end of the injection pump piston is fixed on the push plate and the other end is inserted into the liquid barrel. The end of the liquid barrel away from the injection pump piston is connected to the inlet and outlet liquid nozzle. The inlet and outlet liquid nozzle is opposite to and connected to the inlet and outlet liquid ports so that the injection pump piston can be driven by the push plate to reciprocate to push the liquid in the liquid barrel to discharge the liquid from the inlet and outlet liquid nozzle.

[0020] In some embodiments,

[0021] The liquid arranged in the liquid barrel is mercury, phenolic resin + amino resin + inorganic filler, or epoxy resin + polyester + glass fiber; when the liquid is phenolic resin + amino resin + inorganic filler, the volume ratio is 1-5:1-4:0.5-1; when the liquid is epoxy resin + polyester + glass fiber, the volume ratio is 1-6:1-2:0.5-1.5.

[0022] In some embodiments,

[0023] The injection pump system also includes a coupling, a motor mounting frame and a mounting base plate. The injection pump drive motor is connected to one end of the screw through the coupling. The motor mounting frame is arranged on the outer periphery of the coupling. There are two liquid barrels and two injection pump pistons respectively, and the liquid barrels and the injection pump pistons are arranged one by one. The motor mounting frame, the push plate and the liquid barrel are all arranged on the mounting base plate.

[0024] In some embodiments,

[0025] A sealing ring is arranged between the sealing piston and the inner wall of the forming cylinder; the invention also includes a frame, an optical scanning galvanometer, a controller, a linear drive, a front slurry recovery trough, a rear slurry recovery trough and an injection pump bracket, wherein the optical scanning galvanometer, the controller, the linear drive, the front slurry recovery trough and the rear slurry recovery trough are all arranged on the frame, the front slurry recovery trough and the rear slurry recovery trough are both located below the storage-type scraper, and the injection pump system is arranged on the frame through the injection pump bracket.

[0026] The photocuring 3D printing device for ceramic parts provided by the present invention has the following beneficial effects:

[0027] The present invention is provided with an injection pump system, which can inject liquid into the upper end surface of the sealing piston and make the liquid level flush with the upper end surface of the upper mounting plate, and after the liquid is injected, the storage type scraper can inject material into the upper end surface of the upper mounting plate and the liquid level and scrape the material for printing, avoiding the situation in the prior art that a large amount of material needs to be injected into the concave space to fill the concave before scraping printing can be performed. The density of the inlet and outlet liquid of the present invention is much greater than the density of the slurry, and the inlet and outlet liquid sinks to the bottom layer of the forming cylinder, filling the concave space with the liquid, so that only a layer of material needs to be laid on the upper mounting plate and the upper surface of the liquid to perform printing. Scraping printing is performed, that is, only a small amount of slurry is spread on the surface of the inlet and outlet liquid of the forming cylinder to print large-sized ceramic parts. When printing large-sized ceramic components, it can greatly save slurry and the process of recycling slurry, and will not affect the spreading and curing of the slurry, thereby solving the problem of large amount of slurry required for 3D printing of large-sized ceramic components; and the inlet and outlet liquids are not prone to interface reaction with the surface of the forming blank, thereby not affecting the surface quality of the forming blank; and since the viscosity of the inlet and outlet liquids is greater than that of the slurry, they sink to the bottom layer of the forming cylinder below the material, without shaking and instability of the liquid surface, thereby solving the problem of poor stability of the printing liquid surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 It is a three-dimensional structural diagram of the light-curing 3D printing device for large-size ceramic parts of the present invention.

[0030] Figure 2It is a front cross-sectional view of a forming cylinder system portion of a photocuring 3D printing device for large-size ceramic parts of the present invention.

[0031] Figure 3 It is a three-dimensional structural diagram of the forming cylinder system part of the light-curing 3D printing equipment for large-size ceramic parts of the present invention.

[0032] Figure 4 It is a three-dimensional structural diagram of the injection pump system part of the large-size ceramic component light-curing 3D printing device of the present invention.

[0033] The reference numerals are:

[0034] 1. Frame; 2. Optical scanning galvanometer; 3. Controller; 4. Linear drive; 5. Front slurry recovery tank; 6. Forming cylinder system; 7. Injection pump system; 8. Z-axis drive motor; 9. Rear slurry recovery tank; 10. Storage scraper; 11. Injection pump bracket;

[0035] 601, upper mounting plate; 602, sealing piston; 603, sealing ring; 604, filter; 605, guide piston; 606, lower mounting plate; 607, inlet and outlet liquid pipelines; 608, inlet and outlet liquid ports; 609, forming cylinder; 610, connecting rod; 611, filter screen; 612, recessed space;

[0036] 701, injection pump drive motor; 702, motor mounting bracket; 703, coupling; 704, screw; 705, injection pump piston; 706, liquid barrel; 707, liquid inlet and outlet nozzles; 708, mounting base plate; 709, push plate. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is by no means intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0039] Unless otherwise specifically stated, the relative arrangement of the parts and steps described in these embodiments, numerical expressions and numerical values ​​do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to the actual proportional relationship. The technology, method and equipment known to ordinary technicians in the relevant field may not be discussed in detail, but in appropriate cases, the technology, method and equipment should be regarded as a part of the authorization specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, so once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0040] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0041] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0042] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0043] like Figure 1-4As shown, the present invention provides a photocuring 3D printing device for ceramic parts, which includes:

[0044] A forming cylinder system 6, an injection pump system 7 and a storage scraper 10, wherein the forming cylinder system 6 is located below the storage scraper 10, and the forming cylinder system 6 includes an upper mounting plate 601, a sealing piston 602 and a forming cylinder 609, wherein the sealing piston 602 is disposed in the forming cylinder 609 and can move up and down in a vertical direction, wherein the upper mounting plate 601 is mounted on the outer periphery of the upper end of the forming cylinder 609, wherein the upper end face of the sealing piston 602 has a recessed space 612 at a vertical distance from the top end of the inner periphery of the forming cylinder 609, wherein the injection pump system 7 is located below the forming cylinder system 6, and can inject liquid into the upper end face of the sealing piston 602 and can make the liquid level flush with the upper end face of the upper mounting plate 601, and after the liquid is injected, the storage scraper 10 can inject material into the upper end face of the upper mounting plate 601 and the liquid level and scrape the material for printing.

[0045] The present invention sets an injection pump system, which can inject liquid into the upper end surface of the sealing piston and make the liquid level flush with the upper end surface of the upper mounting plate. After the liquid is injected, the storage scraper can inject material into the upper end surface of the upper mounting plate and the liquid level and scrape the material for printing, avoiding the situation in the prior art that a large amount of material needs to be injected into the recessed space to fill the recess before scraping printing can be performed. The density of the inlet and outlet liquid of the present invention is much greater than the density of the slurry. The inlet and outlet liquid sinks to the bottom layer of the forming cylinder, and the liquid fills the recessed space, so that scraping printing can be performed by laying a layer of material on the upper mounting plate and the upper surface of the liquid, that is, only a small amount of slurry is spread on the upper surface of the inlet and outlet liquid of the forming cylinder to print large-sized ceramic parts. When printing large-sized ceramic components, the slurry and slurry recovery processes can be greatly saved, and the spreading and curing of the slurry will not be affected, thereby solving the problem of a large amount of slurry required for 3D printing of large-sized ceramic components.

[0046] The ultra-high-complexity ceramic component photocuring 3D printer of the present invention fills the space formed by the downward movement of the sealing piston in the forming cylinder system through the inlet and outlet liquid, thereby achieving the effect of stabilizing the liquid level and saving printing slurry during the ceramic slurry printing process, thereby realizing the printing and forming of ultra-high-complexity structure ceramic components.

[0047] In some embodiments,

[0048] The density of the liquid is greater than the density of the material injected by the storage scraper 10 (preferably a resin or liquid metal with a density of 2-14g / cm3), and the liquid does not chemically react with the material. After the storage scraper 10 injects the material and prints a layer of product, the sealing piston 602 descends a preset distance in the forming cylinder 609, and then the injection pump system 7 injects a preset amount of liquid toward the upper end surface of the sealing piston 602 to always keep the liquid level flush with the upper end surface of the upper mounting plate 601, and then continues to inject and scrape the material on the upper end surface of the upper mounting plate 601 and the liquid level through the storage scraper 10 for printing.

[0049] The density of the inlet and outlet liquid of the present invention is much greater than the density of the slurry, and the inlet and outlet liquid sinks to the bottom layer of the forming cylinder. The inlet and outlet liquid is not easy to react with the surface of the formed blank, and will not affect the surface quality of the formed blank; and because the viscosity of the inlet and outlet liquid is greater than that of the slurry, it sinks to the bottom layer of the forming cylinder below the material, and the liquid surface will not shake or be unstable, which can effectively solve the problem of poor stability of the printing liquid surface.

[0050] In some embodiments,

[0051] The forming cylinder system 6 also includes a liquid inlet and outlet pipeline 607 and a liquid inlet and outlet port 608. The liquid inlet and outlet port 608 is located at the lower end of the liquid inlet and outlet pipeline 607, and the liquid inlet and outlet port 608 is connected to the injection pump system 7, so that the injection pump system 7 can inject liquid into the recessed space 612 above the sealing piston 602 through the liquid inlet and outlet pipeline 607.

[0052] The present invention can further connect to the injection pump system through the liquid inlet and outlet pipes and the liquid inlet and outlet ports, so that the liquid can be injected into the recessed space above the sealing piston through the injection pump system, thereby effectively filling the recessed space, so that only a small amount of material needs to be laid to perform 3D printing, reducing the layout of the material, improving the molding efficiency, and ensuring the stability of the liquid level during the printing process.

[0053] In some embodiments,

[0054] It also includes a Z-axis drive motor 8, a guide piston 605 and a connecting rod 610. The Z-axis drive motor 8 is connected to the sealing piston 602 to drive the sealing piston 602 to reciprocate in the forming cylinder 609. The forming cylinder 609 is provided with a guide piston 605. The connecting rod 610 is provided between the sealing piston 602 and the guide piston 605. The guide piston 605, the connecting rod 610 and the sealing piston 602 are connected as a whole and move up and down as a whole in the forming cylinder 609.

[0055] The present invention can further effectively drive the sealing piston through the setting of the Z-axis driving motor to drive the sealing piston to move up and down. The guide piston is connected to the sealing piston through a connecting rod and can guide the up and down movement of the sealing piston. The guide piston can also effectively guide the inlet and outlet liquid pipelines to ensure that the injection pump system can smoothly inject liquid upward.

[0056] In some embodiments,

[0057] A filter 604 is also provided between the sealing piston 602 and the guide piston 605. The sealing piston 602 is provided with mounting holes from top to bottom. A filter screen 611 is provided at the upper end of the mounting hole. The filter screen 611 is connected to the filter 604 through the mounting hole. The filter 604 is connected to the upper end of the inlet and outlet liquid pipeline 607 so as to filter the liquid injected by the injection pump system 7 and then enter the upper end surface of the sealing piston 602 after passing through the filter screen 611.

[0058] The present invention also arranges the filter, the mounting hole on the sealing piston and the filter screen, and the filter is connected to the upper end of the inlet and outlet liquid pipelines connected to the injection pump system, so that the liquid pumped out by the injection pump system can be filtered through the filter, and then further filtered through the filter screen to filter out solid and other impurities, so that the liquid entering the upper end of the sealing piston does not contain other impurities, further ensuring that no chemical reaction occurs between the liquid and the material, and further ensuring the stability of the material liquid level during the printing process.

[0059] In some embodiments,

[0060] A lower mounting plate 606 is also provided at the lower end of the forming cylinder 609, and the liquid inlet and outlet pipelines 607 pass through the lower mounting plate 606 and the guide piston 605 in sequence upward to guide the liquid to the filter 604. The Z-axis drive motor 8 also passes through the lower mounting plate 606 and the guide piston 605 in sequence upward and is connected to the sealing piston 602.

[0061] The present invention can fix the lower end of the forming cylinder through the lower mounting plate, and the inlet and outlet liquid pipelines pass through the lower mounting plate and the guide piston in turn upward, and can be guided by the guide piston, so as to inject the liquid in the injection pump system into the filter to enter the recessed space at the upper end of the sealing piston. The Z-axis drive motor passes through the lower mounting plate and the guide piston upward, and can be connected to the sealing piston, thereby driving the sealing piston to move up and down.

[0062] In some embodiments,

[0063] The injection pump system 7 includes an injection pump drive motor 701, a screw 704, an injection pump piston 705, a liquid barrel 706, a push plate 709 and a liquid inlet and outlet nozzle 707. The injection pump drive motor 701 and the screw 704 can drive the screw 704 to rotate. The screw 704 passes through the push plate 709 and is threadedly matched with the push plate 709 to drive the push plate 709 to reciprocate through the rotation of the screw 704. The injection pump piston One end of 705 is fixed on the push plate 709, and the other end is inserted into the liquid barrel 706. The end of the liquid barrel 706 away from the injection pump piston 705 is connected to the liquid inlet and outlet nozzle 707. The liquid inlet and outlet nozzle 707 is opposite to and connected to the liquid inlet and outlet port 608, so that the injection pump piston 705 can be driven by the push plate 709 to reciprocate, so as to push the liquid in the liquid barrel 706 to discharge the liquid from the liquid inlet and outlet nozzle 707.

[0064] This is the preferred structural form of the injection pump system of the present invention. The injection pump driving motor can drive the screw to rotate, and the screw and the push plate are threadedly connected to convert the rotation of the thread into reciprocating motion of the push plate, and then the injection pump piston is pushed by the push plate to move in the liquid barrel, and then the material in the liquid barrel can be pushed out and pumped to the upper end of the sealing piston, thereby achieving the effect of filling the recessed space, reducing the laying of materials, reducing unnecessary material waste, and stabilizing the printing liquid surface.

[0065] In some embodiments,

[0066] The liquid disposed in the liquid barrel 706 is mercury, phenolic resin + amino resin + inorganic filler, or epoxy resin + polyester + glass fiber; when the liquid is phenolic resin + amino resin + inorganic filler, the volume ratio thereof is 1-5:1-4:0.5-1; when the liquid is epoxy resin + polyester + glass fiber, the volume ratio thereof is 1-6:1-2:0.5-1.5.

[0067] This is the preferred material for the liquid of the present invention. Through the above material, it is possible to effectively achieve no chemical reaction with the material, and the density is greater than that of the material. It sinks below the material and supports the lower end of the material, so that only a thin layer of material needs to be laid to achieve the effect of printing a large volume product, and the stability of the material printing liquid surface is ensured.

[0068] When selecting the inlet and outlet liquids in the injection pump piston, mercury is usually selected. If the slurry reacts with mercury, epoxy resin + polyester + glass fiber is selected when the printing temperature is room temperature-100°C; phenolic resin + amino resin + inorganic filler is selected when the printing temperature is 50-160°C.

[0069] In some embodiments,

[0070] The injection pump system 7 also includes a coupling 703, a motor mounting frame 702 and a mounting base 708. The injection pump drive motor 701 is connected to one end of the screw 704 through the coupling 703. The motor mounting frame 702 is arranged on the outer periphery of the coupling 703. There are two liquid barrels 706 and two injection pump pistons 705, and the liquid barrels 706 and the injection pump pistons 705 are arranged in a one-to-one correspondence. The motor mounting frame 702, the push plate 709 and the liquid barrel 706 are all arranged on the mounting base 708.

[0071] The present invention also realizes the connection between the injection pump drive motor and the screw through a coupling. The motor mounting frame can be used to install the motor and the coupling. The mounting floor is used to fix the motor mounting frame, the push plate and the liquid barrel and other structures to realize the integrated structural form of the injection pump system.

[0072] In some embodiments,

[0073] A sealing ring 603 is arranged between the sealing piston 602 and the inner wall of the forming cylinder 609; it also includes a frame 1, an optical scanning galvanometer 2, a controller 3, a linear drive 4, a front slurry recovery tank 5, a rear slurry recovery tank 9 and an injection pump bracket 11, the optical scanning galvanometer 2, the controller 3, the linear drive 4, the front slurry recovery tank 5 and the rear slurry recovery tank 9 are all arranged on the frame 1, the front slurry recovery tank 5 and the rear slurry recovery tank 9 are both located below the storage scraper 10, and the injection pump system 7 is arranged on the frame 1 through the injection pump bracket 11.

[0074] This is the preferred structural form of the printing device of the present invention. The sealing ring can achieve effective sealing between the sealing piston and the forming cylinder, and the optical scanning galvanometer and other structures play the role of scanning, driving, controlling and material recovery.

[0075] The ultra-economical large-size ceramic component photocuring 3D printing device of the present invention includes the following steps of photocuring 3D printing preparation of ceramic components with complex structures:

[0076] (1) Mixing the dried mixed ceramic powder with the photosensitive resin, and homogenizing and dispersing them in a vacuum homogenizer for 5-30 minutes;

[0077] (2) Printing is performed using a super-economical large-size ceramic component light-curing 3D printer, and the printing power, printing path and scanning speed of different path segments, scraper coating speed and single-layer printing thickness are set. The slurry is cured layer by layer through the 3D printing equipment. After one layer is cured, the forming table descends one layer. The injection pump injects the inlet and outlet liquid of the descending area minus the curing area from the lower surface of the forming table to the upper surface of the forming table, so that the upper surface of the slurry in the forming cylinder is consistent with the height of the scraper slurry spreading layer;

[0078] (3) The storage scraper moves back and forth to accurately control the liquid level and replenish the area where the liquid is lacking;

[0079] (4) Repeating steps (2) and (3) to form a complex ceramic component blank layer by layer;

[0080] (5) Degreasing and sintering the photocurable 3D printed ceramic blank obtained in step (4) to obtain a complex structure photocurable 3D printed ceramic component.

[0081] Compared with the prior art, the ultra-economical large-size ceramic component light-curing 3D printing device and preparation method provided by the present invention have the following technical advantages:

[0082] The ultra-economical large-size ceramic component light-curing 3D printing device provided by the present invention comprises: a frame, an optical scanning galvanometer, an intelligent controller, a linear drive, a front slurry recovery tank, a forming cylinder system, an injection pump system, a Z-axis drive motor, a rear slurry recovery tank, a storage scraper, and an injection pump bracket.

[0083] The working principle of the ultra-economical large-size ceramic component photocuring 3D printing equipment provided by the present invention is: the inlet and outlet liquids are injected into the forming cylinder from the bottom, and only a small amount of slurry is spread on the upper surface of the inlet and outlet liquids of the forming cylinder to print large-size ceramic components, thereby saving slurry and recycling slurry processes when printing large-size ceramic components.

[0084] The design principle of the inlet and outlet liquid for the ultra-economical large-size ceramic component photocuring 3D printing equipment provided by the present invention is as follows: the density of the inlet and outlet liquid is much greater than the density of the slurry, and the inlet and outlet liquid sinks to the bottom layer of the forming cylinder, which will not affect the spreading and solidification of the slurry; secondly, the inlet and outlet liquid is not prone to interfacial reaction with the surface of the formed blank, and will not affect the surface quality of the formed blank; furthermore, the viscosity of the inlet and outlet liquid is greater than that of the slurry, and the liquid surface will not shake or be unstable at the bottom layer of the forming cylinder, which can effectively solve the problem of unstable liquid surface when photocuring prints thick and large components.

[0085] Example

[0086] like Figure 1As shown, a super-economical large-size ceramic component light-curing 3D printing device includes: a frame 1, an optical scanning galvanometer 2, a controller 3, a linear drive 4, a front slurry recovery tank 5, a forming cylinder system 6, an injection pump system 7, a Z-axis drive motor 8, a rear slurry recovery tank 9, a storage scraper 10, and an injection pump bracket 11; the injection pump system includes an injection pump drive motor 701, a motor mounting frame 702, a coupling 703, a screw 704, an injection pump piston 705, a liquid barrel 706, and an inlet and outlet liquid The nozzle 707, the mounting base plate 708, and the push plate 709 are mainly used for the precise injection of the liquid in and out of the descending part of the forming cylinder during the printing process; the forming cylinder system includes an upper mounting plate 601, a sealing piston 602, a sealing ring 603, a filter 604, a guide piston 605, a lower mounting plate 606, liquid inlet and outlet pipelines 607, liquid inlet and outlet ports 608, a Z-axis drive motor 8, a forming cylinder 609, a connecting rod 610, and a filter screen 611, which are mainly used to control the printing layer thickness and fix and carry the printed body.

[0087] The use of ultra-economical large-size ceramic parts light-curing 3D printing equipment specifically includes the following steps:

[0088] (1) mixing and stirring the ceramic powder for 2 h, and drying to obtain a mixed powder;

[0089] (2) adding the mixed powder obtained above into the photocurable resin, and performing vacuum homogenization and dispersion by a homogenizer for 20 minutes to obtain a photocurable 3D printing ceramic slurry;

[0090] (3) The photocurable 3D printing ceramic slurry is printed using an ultra-economical large-size ceramic component photocurable 3D printer, and the printing paths are set respectively, the printing power is set to 32nW / cm2, the scanning speed is set to 0.1m / s, the scraper coating speed is set to 0.02m / s, and the single-layer printing thickness is set to 100μm. After one layer is cured, the forming table is lowered by one layer, and the injection pump injects the inlet and outlet liquid (inlet and outlet liquid composition: epoxy resin + polyester + glass fiber (volume ratio 1:2:1.5)) from the lower surface of the forming table to the upper surface of the forming table. The upper surface of the forming cylinder slurry is consistent with the height of the scraper slurry spreading layer;

[0091] (4) The storage scraper moves back and forth to accurately control the liquid level and replenish the area where the liquid is lacking;

[0092] (5) Repeating steps (3) and (4) to form a complex ceramic component blank layer by layer;

[0093] (6) Degreasing and sintering the photocurable 3D printed ceramic blank obtained in step (5) to obtain a large-scale complex structure photocurable 3D printed ceramic component.

[0094] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the present invention. The above description is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and variations can be made without departing from the technical principles of the present invention, and any combination between the embodiments shall be regarded as the protection scope of the present invention.

Claims

1. A photocuring 3D printing device for ceramic parts, characterized in that: include: A forming cylinder system (6), an injection pump system (7) and a storage scraper (10), wherein the forming cylinder system (6) is located below the storage scraper (10), the forming cylinder system (6) comprises an upper mounting plate (601), a sealing piston (602) and a forming cylinder (609), the sealing piston (602) is arranged in the forming cylinder (609) and can move up and down in a vertical direction, the upper mounting plate (601) is installed on the upper end periphery of the forming cylinder (609), and the sealing piston The upper end surface of (602) has a recessed space (612) in the vertical direction away from the inner circumferential top of the forming cylinder (609), the injection pump system (7) is located below the forming cylinder system (6), and can inject liquid into the upper end surface of the sealing piston (602) and make the liquid level flush with the upper end surface of the upper mounting plate (601), and after the liquid is injected, the storage scraper (10) can inject material into the upper end surface of the upper mounting plate (601) and the liquid level and scrape the material for printing.

2. The photocuring 3D printing device for ceramic parts according to claim 1, characterized in that: The density of the liquid is greater than the density of the material injected by the storage scraper (10), and the liquid does not chemically react with the material. After the storage scraper (10) injects the material and prints a layer of product, the sealing piston (602) descends a preset distance in the forming cylinder (609), and then the injection pump system (7) injects a preset amount of liquid toward the upper end surface of the sealing piston (602) to always keep the liquid level flush with the upper end surface of the upper mounting plate (601), and then continues to inject and scrape the material on the upper end surface of the upper mounting plate (601) and the liquid level through the storage scraper (10) to perform printing.

3. The photocuring 3D printing device for ceramic parts according to claim 1, characterized in that: The forming cylinder system (6) also includes an inlet and outlet liquid pipeline (607) and an inlet and outlet liquid port (608), wherein the inlet and outlet liquid port (608) is located at the lower end of the inlet and outlet liquid pipeline (607), and the inlet and outlet liquid port (608) is connected to the injection pump system (7), so that the injection pump system (7) can inject liquid into the recessed space (612) above the sealing piston (602) through the inlet and outlet liquid pipeline (607).

4. The light-curing 3D printing device for ceramic parts according to claim 3, characterized in that: It also includes a Z-axis drive motor (8), a guide piston (605) and a connecting rod (610). The Z-axis drive motor (8) is connected to the sealing piston (602) so as to drive the sealing piston (602) to reciprocate in the forming cylinder (609). The forming cylinder (609) is provided with a guide piston (605). The connecting rod (610) is provided between the sealing piston (602) and the guide piston (605). The guide piston (605), the connecting rod (610) and the sealing piston (602) are connected as a whole and move up and down as a whole in the forming cylinder (609).

5. The photocuring 3D printing device for ceramic parts according to claim 4, characterized in that: A filter (604) is also provided between the sealing piston (602) and the guide piston (605). The sealing piston (602) is provided with mounting holes extending therethrough from top to bottom. A filter screen (611) is provided at the upper end of the mounting hole. The filter screen (611) is connected to the filter (604) through the mounting hole. The filter (604) is connected to the upper end of the liquid inlet and outlet pipeline (607) so as to filter the liquid injected by the injection pump system (7) and then enter the upper end surface of the sealing piston (602) after passing through the filter screen (611).

6. The light-curing 3D printing device for ceramic parts according to claim 5, characterized in that: The lower end of the forming cylinder (609) is also provided with a lower mounting plate (606), and the liquid inlet and outlet pipelines (607) pass through the lower mounting plate (606) and the guide piston (605) in sequence upwards so as to guide the liquid into the filter (604). The Z-axis drive motor (8) also passes through the lower mounting plate (606) and the guide piston (605) in sequence upwards and is connected to the sealing piston (602).

7. The photocuring 3D printing device for ceramic parts according to any one of claims 3 to 6, characterized in that: The injection pump system (7) includes an injection pump drive motor (701), a screw (704), an injection pump piston (705), a liquid barrel (706), a push plate (709) and a liquid inlet and outlet nozzle (707). The injection pump drive motor (701) and the screw (704) can drive the screw (704) to rotate. The screw (704) passes through the push plate (709) and is threadedly matched with the push plate (709) so that the push plate (709) can be driven to reciprocate by the rotation of the screw (704). One end of the pump piston (705) is fixed on the push plate (709) and the other end is inserted into the liquid barrel (706). The end of the liquid barrel (706) away from the injection pump piston (705) is connected to the liquid inlet and outlet nozzle (707). The liquid inlet and outlet nozzle (707) is opposite to and connected to the liquid inlet and outlet port (608), so that the injection pump piston (705) can be driven by the push plate (709) to reciprocate to push the liquid in the liquid barrel (706) to discharge the liquid from the liquid inlet and outlet nozzle (707).

8. The light-curing 3D printing device for ceramic parts according to claim 7, characterized in that: The liquid disposed in the liquid barrel (706) is mercury, phenolic resin + amino resin + inorganic filler, or epoxy resin + polyester + glass fiber; when the liquid is phenolic resin + amino resin + inorganic filler, the volume ratio thereof is 1-5:1-4:0.5-1; when the liquid is epoxy resin + polyester + glass fiber, the volume ratio thereof is 1-6:1-2:0.5-1.

5.

9. The light-curing 3D printing device for ceramic parts according to claim 7, characterized in that: The injection pump system (7) further comprises a coupling (703), a motor mounting frame (702) and a mounting base plate (708); the injection pump drive motor (701) is connected to one end of the screw rod (704) via the coupling (703); the motor mounting frame (702) is arranged on the outer periphery of the coupling (703); there are two liquid barrels (706) and two injection pump pistons (705), and the liquid barrels (706) and the injection pump pistons (705) are arranged in a one-to-one correspondence; and the motor mounting frame (702), the push plate (709) and the liquid barrel (706) are all arranged on the mounting base plate (708).

10. The photocuring 3D printing device for ceramic parts according to any one of claims 1 to 9, characterized in that: A sealing ring (603) is arranged between the sealing piston (602) and the inner wall of the forming cylinder (609); the system also includes a frame (1), an optical scanning galvanometer (2), a controller (3), a linear driver (4), a front slurry recovery trough (5), a rear slurry recovery trough (9) and an injection pump bracket (11); the optical scanning galvanometer (2), the controller (3), the linear driver (4), the front slurry recovery trough (5) and the rear slurry recovery trough (9) are all arranged on the frame (1); the front slurry recovery trough (5) and the rear slurry recovery trough (9) are both located below the storage scraper (10); and the injection pump system (7) is arranged on the frame (1) through the injection pump bracket (11).

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