A preparation method for an apparatus and a product integrally formed by photocuring 3D printing

Abstract

The present invention provides a device for integrally forming a light-cured 3D printing and a preparation method for a product. The device includes a forming support table, a printing tank, and a light-curing unit. The slurry can be disposed on the printing tank. The light-curing unit is located above the printing tank, and the forming support table is located below the printing tank and can move towards the printing tank to form the slurry. During the forming process, the light-curing unit can scan the slurry on the printing tank. The light-curing unit is at least two, and different light-curing units act on the slurry in different regions on the printing tank, and different light-curing units can provide at least one of different laser powers, different scanning paths, and different scanning speeds to cure and form the slurry in different regions. According to the present invention, it is possible to integrally form a structure with differential performance requirements such as internal porosity and surface densification, and meet the differential requirements of integrally formed components such as air permeability, light weight, and surface wear resistance.

Description

Technical Field

[0001] The present invention relates to the technical field of auxiliary materials production for precision casting, and particularly relates to a device for one-piece forming by photocuring 3D printing and a preparation method for products. Background Art

[0002] Multifunctional integrated high-precision complex structure ceramic components have broad application prospects in the fields of microelectronics, biomedical engineering, aerospace, etc., and are difficult to produce by traditional ceramic preparation processes. 3D printing ceramic technology is the most promising technology to realize their production. However, the previous additive manufacturing ceramic technologies can only achieve the interlayer distribution of multifunctional ceramic materials, and it is difficult to synchronously form multifunctional ceramic materials in the same printing layer, unable to meet the requirements of different positions of current ceramic components for different performances.

[0003] In order to meet the performance requirements of different regions of ceramic components, at present, it is generally adopted to prepare the parts with different performance requirements of ceramic components by using different processes. For example, a typical example is that the inside of a ceramic component is required to be porous to achieve the purpose of weight reduction, but the surface is required to be smooth and wear-resistant. The current preparation process is that the internal matrix material adopts the traditional porous ceramic preparation process, and a ceramic coating is sprayed on the surface of the prepared material, or coatings such as enamel and porcelain are prepared on the surface to make the surface smooth and wear-resistant. However, this preparation process still has problems. When preparing complex structure components, due to the surface shielding effect of the complex structure, the spraying / impregnation to prepare coatings / enamel / porcelain cannot be fully covered, and the exposed areas become the preferred areas for wear and corrosion liquid to enter, greatly affecting the service life of the product. In addition, in the precision casting of aerospace complex hollow structure parts, the ceramic mold in the part and the ceramic core outside have different requirements for strength and air permeability. In order to meet these requirements, at present, the ceramic core is prepared by hot pressing injection, and then the shell is prepared by the shell-making process, and finally the core and the shell are assembled. The process of separately preparing and then assembling different functional components leads to the generation of fitting errors and gaps, resulting in excessive dimensional deviation of the components, and even scrapping due to exposed ribs and cores. The demand for multi-performance complex structure one-piece forming ceramic components urgently needs to be solved.

[0004] Due to the technical problems that the existing technology cannot meet the requirements of one-piece forming of different regions and different structures in investment casting due to the different requirements of the core and the shell in the mold during the ceramic casting process, etc., the present invention researches and designs a device for one-piece forming by photocuring 3D printing and a preparation method for products. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect that the existing stereolithography 3D printing equipment and process cannot meet the requirements of investment casting for integral forming of different structures in different regions, so as to provide an equipment for integral forming by stereolithography 3D printing and a preparation method of products.

[0006] To solve the above problems, the present invention provides an equipment for integral forming by stereolithography 3D printing, which includes: a forming support table, a printing tank, and a stereolithography unit. The slurry can be arranged on the printing tank. The stereolithography unit is located above the printing tank, and the forming support table is located below the printing tank and can move towards the printing tank to form the slurry. During the forming process, the stereolithography unit can scan the slurry on the printing tank. The stereolithography unit is at least two, and different stereolithography units act on the slurry in different regions of the printing tank, and different stereolithography units can provide at least one of different laser powers, different scanning paths, and different scanning speeds to cure and form the slurry in different regions.

[0007] In some embodiments, the stereolithography unit includes a galvanometer scanner and a laser. The laser can emit light to the galvanometer scanner, and the galvanometer scanner can receive the light emitted by the laser and reflect the light onto the slurry in the printing tank to form a curing light path to cure and form the slurry. When the stereolithography unit is at least two, the galvanometer scanners are at least two, and the lasers are also at least two, and the galvanometer scanners and the lasers are arranged in one-to-one correspondence.

[0008] In some embodiments, the stereolithography unit is an ultraviolet curing unit, and the laser is an ultraviolet laser. The ultraviolet laser can emit ultraviolet light to the galvanometer scanner, and the galvanometer scanner can receive the ultraviolet light emitted by the ultraviolet laser and reflect the ultraviolet light onto the slurry in the printing tank.

[0009] In some embodiments, the printing tank includes a first region and a second region. The stereolithography unit is two, including a first stereolithography unit and a second stereolithography unit. The first stereolithography unit is opposite to the first region to scan the slurry on the first region, and the second stereolithography unit is opposite to the second region to scan the slurry on the second region. At least one of different laser powers, different scanning paths, and different scanning speeds can be provided between the first stereolithography unit and the second stereolithography unit.

[0010] In some embodiments, the slurry on the first region can be formed into a first part under the combined action of the first light-curing unit and the forming support table, and the slurry on the second region can be formed into a second part under the combined action of the second light-curing unit and the forming support table. The porosity of the first part is greater than that of the second part.

[0011] In some embodiments, it further includes a lifting drive mechanism for the printing support table. The lifting drive mechanism for the printing support table is supported at the lower end of the forming support table. The lifting drive mechanism for the printing support table can drive the forming support table to move up and down, and can control the up-and-down movement distance and speed of the forming support table.

[0012] In some embodiments, the printing groove includes a frame structure. There is a through-groove structure in the middle of the frame structure. The area of the through-groove structure can be coated with slurry, and the through-groove structure can receive the scanning light emitted from the light-curing unit above.

[0013] In some embodiments, it further includes a slurry scraping system. The slurry scraping system is arranged in the through-groove structure of the printing groove to scrape the slurry in the through-groove structure and can also store the slurry.

[0014] In some embodiments, it further includes a frame and a control-display system. The light-curing unit, the lifting drive mechanism for the printing support table, and the control-display system are all arranged on the frame. The control-display system is electrically connected to the lifting drive mechanism for the printing support table, the light-curing unit, and the slurry scraping system respectively.

[0015] The present invention also provides a preparation method for a multi-performance material light-curing 3D printing product, which includes:

[0016] Stirring and drying step: mixing and stirring the material powder, and then obtaining a mixed powder through drying;

[0017] Slurry preparation step: adding the above-mentioned mixed powder into a light-curing resin, heating to a preset temperature, and then keeping warm and stirring for a preset time to obtain a light-curing 3D printing slurry;

[0018] 3D printing and one-piece forming step: using the aforementioned light-curing 3D printing and one-piece forming equipment to print the light-curing 3D printing slurry to obtain a 3D printing one-piece green body;

[0019] Debinding and sintering step: subjecting the 3D printing one-piece green body to debinding and sintering to obtain a light-curing 3D printing one-piece component.

[0020] The light-curing 3D printing and one-piece forming equipment and the preparation method for the product provided by the present invention have the following beneficial effects:

[0021] The present invention sets up more than two photocuring units. Different photocuring units act on slurries in different areas of the printing tank, and different photocuring units can provide different laser powers, different scanning paths, and different scanning speeds. As a result, the slurries in different areas of the printing tank can be cured into different material structure properties, such as layered structures with different pore distributions, etc., so as to realize the integrated molding of structures with different performance requirements such as internal porosity and surface densification, and meet the differential requirements of integrated molding parts such as air permeability, light weight, and surface wear resistance; through the synchronous curing and molding of the double light paths of photocuring 3D printing of the present invention, the printing is made more efficient; since the slurries used for realizing its differential molding are prepared from the same material, the cost and cycle are greatly reduced; during the printing process, there is no need to replace the print head and the slurry, avoiding the introduction of other impurity elements in the material, and the product quality is stable and the process is reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic structural diagram of the equipment for integrated molding of photocuring 3D printing of the present invention.

[0023] The reference numerals are shown as:

[0024] 1, frame; 2, forming support table; 3, slurry scraping system; 4, printing tank; 5, lifting drive mechanism for the printing support table; 6, control-display system; 7, laser; 8, reflecting galvanometer; 100, photocuring unit; 101, first photocuring unit; 102, second photocuring unit. DETAILED DESCRIPTION OF THE INVENTION

[0025] As Figure 1 shown, the present invention provides an equipment for integrated molding of photocuring 3D printing, which includes:

[0026] A forming support table 2, a printing tank 4, and a photocuring unit 100. The slurry can be arranged on the printing tank 4. The photocuring unit 100 is located above the printing tank 4. The forming support table 2 is located below the printing tank 4 and can move towards the printing tank 4 to form the slurry. During the forming process, the photocuring unit 100 can scan the slurry on the printing tank 4. The photocuring unit 100 is at least two. Different photocuring units act on the slurries in different areas of the printing tank 4, and different photocuring units can provide at least one of different laser powers, different scanning paths, and different scanning speeds to cure and form the slurries in different areas.

[0027] The present invention provides more than two photocuring units, and different photocuring units act on slurries in different areas of the printing tank. Different photocuring units can provide different laser powers, different scanning paths, and different scanning speeds, so that slurries in different areas of the printing tank can be cured into different material structure properties, such as layered structures with different pore distributions, etc., thereby realizing the integral molding of structures with different performance requirements such as porous interiors and dense surfaces, meeting the differential requirements of integral molding components such as breathability, light weight, and surface wear resistance; through the synchronous curing and molding of the double light paths of photocuring 3D printing, the present invention makes the printing more efficient; since the slurries used to achieve its differential molding are prepared from the same material, the cost and cycle are greatly reduced; during the printing process, there is no need to replace the print head and the slurry, avoiding the introduction of other impurity elements in the material, and the product quality is stable and the process is reliable.

[0028] In the present invention, the forming support table 2 is located below the printing tank 4 and can move upward to act on the slurry in the printing tank 4 to form the slurry. The photocuring unit 100 is located above the printing tank 4 and can emit light upward to act on the slurry in the printing tank 4. This is the preferred positional relationship among the forming support table, the printing tank, and the photocuring unit of the present invention, that is, preferably the forming support table is located below the printing tank and the forming support table moves upward from bottom to top to form the slurry on the printing tank. After the formation of one layer of structure is completed, the forming support table moves downward from top to bottom to separate from the slurry, so as to scrape the next layer of slurry, and then the forming support table moves upward to realize the formation of the next layer. Each time the forming support table moves upward, the formation of one layer of slurry structure is completed. At the same time, the photocuring unit is located above, and scans the slurry during the formation process to achieve the effect of single-layer 3D printing.

[0029] The purpose of the present invention is to provide an asynchronous control dual-beam multi-performance ceramic material photocuring 3D printing device and method. The device includes: a frame, a forming support table, a slurry scraping system, a printing tank, a printing support table lifting drive mechanism, an intelligent control-display system, an ultraviolet laser, and a reflecting galvanometer. The ultraviolet laser and the reflecting galvanometer are installed directly above the frame. The printing support table lifting drive device is connected to the forming support table, installed directly below the frame, and can drive the forming support table to move up and down precisely. The intelligent control-display system controls the power and movement speed of the ultraviolet laser, the reflecting galvanometer, and the printing support table lifting drive mechanism.

[0030] The one-piece molded photocuring 3D printer of the present invention uses two independently controlled ultraviolet lasers and galvanometric mirrors to simultaneously scan two ultraviolet laser beams with different powers, different scanning paths, and different scanning speeds on the same printing plane, so as to prepare different pore distributions and layered structure characteristics in the forming area, thereby realizing the differential preparation of one-piece molding.

[0031] The device of the present invention utilizes two independently controllable light beams, with different scanning times, scanning powers, and scanning paths of the light beams, resulting in differences in the regional microstructure and performance on each printing layer, so as to meet the usage requirements at one time.

[0032] In some embodiments, the photocuring unit 100 includes a galvanometric mirror 8 and a laser 7. The laser 7 can emit light to the galvanometric mirror 8, and the galvanometric mirror 8 can receive the light emitted by the laser and reflect the light onto the slurry in the printing tank 4 to form a curing light path for curing and molding the slurry. When there are at least two photocuring units 100, there are at least two galvanometric mirrors 8 and at least two lasers 7, and the galvanometric mirrors 8 and the lasers 7 are arranged in one-to-one correspondence.

[0033] This is the preferred structural form of the photocuring unit of the present invention. The laser can emit a laser beam, and further, the emitted galvanometric mirror can reflect the beam onto the slurry in the printing tank to scan the slurry during printing, thereby completing the 3D printing effect of photocuring molding. Further, one photocuring unit includes a laser and a galvanometric mirror in one-to-one correspondence, and another photocuring unit includes another pair of a laser and a galvanometric mirror in one-to-one correspondence, so as to achieve different scanning effects on the slurries in different regions of the printing tank, obtain a layered structure with different pore distributions between different regions, and complete the integrated production of ceramic profile structures with different internal structures.

[0034] In some embodiments, the photocuring unit 100 is an ultraviolet photocuring unit, the laser 7 is an ultraviolet laser, the ultraviolet laser can emit ultraviolet light to the galvanometric mirror 8, and the galvanometric mirror 8 can receive the ultraviolet light emitted by the ultraviolet laser and reflect the ultraviolet light onto the slurry in the printing tank 4. This is a further preferred structural form of the photocuring unit of the present invention, that is, preferably an ultraviolet laser, which can emit an ultraviolet beam, and the ultraviolet beam is reflected onto the slurry on the printing tank through an independent galvanometric mirror, realizing fast and effective photocuring 3D printing.

[0035] The ultraviolet lasers of the present invention preferably include two lasers, which are installed above the printing support table and are used to generate and control the ultraviolet light intensity. The two lasers are independently controlled by an intelligent controller and are used to control the ultraviolet laser intensity in different forming regions when printing multi-performance ceramic materials at different positions of the same component.

[0036] The reflecting galvanometer of the present invention preferably includes two high-precision laser galvanometers, which are installed directly above the printing support platform and used to control the scanning area and scanning speed of the ultraviolet laser. The angles and the angular change speeds of the two reflecting galvanometers are independently controlled by an intelligent controller, which is used to control the scanning speed and scanning area of the ultraviolet laser in different forming areas when printing multi-performance ceramic materials at different positions of the same component.

[0037] Preferably, the included angle between the maximum forming position of the forming support platform of the present invention when curing the forming surface and the ultraviolet laser is 59°-90°.

[0038] Preferably, the angle between the ultraviolet laser emitted by the two reflecting galvanometers of the present invention and the forming support platform is 59°-90°.

[0039] In some embodiments, the printing tank 4 includes a first region and a second region, and there are two light-curing units 100, including a first light-curing unit 101 and a second light-curing unit 102. The first light-curing unit 101 faces the first region to scan the slurry on the first region, and the second light-curing unit 102 faces the second region to scan the slurry on the second region. At least one of different laser powers, different scanning paths, and different scanning speeds can be provided between the first light-curing unit 101 and the second light-curing unit 102.

[0040] This is a further preferred corresponding structural relationship between the printing tank and the light-curing unit of the present invention, that is, the printing tank includes a first and a second region, the light-curing unit includes a first and a second light-curing unit. The first light-curing unit faces the first region to scan and print the slurry on the first region, and the second light-curing unit faces the second region to scan and print the slurry on the second region. Since at least one of the laser power, scanning path, and scanning speed between the first and the second light-curing units is different, the internal materials and structures of the formed structures in the first and second regions scanned by the first and second light-curing units are also different. For example, the pore distribution inside is different, that is, the effect of realizing different internal structures in different regions of the same structure in one-piece forming is effectively achieved.

[0041] The projection of the printing tank of the present invention on the horizontal plane is further preferably a rectangular structure, which has a long side and a short side, and the first region and the second region are formed at different positions in the direction of its long side.

[0042] In some embodiments, the slurry on the first region can be jointly acted upon by the first light-curing unit 101 and the forming support table 2 to form a first part, and the slurry on the second region can be jointly acted upon by the second light-curing unit 102 and the forming support table 2 to form a second part. The porosity of the first part is greater than that of the second part. The first part of the present invention is used to reduce mass and provide breathability, while the second part is used for wear resistance.

[0043] The slurry of the present invention is preferably a ceramic material. The ceramic material on the first region can be jointly acted upon by the first light-curing unit 101 and the forming support table 2 to form a ceramic core, and the ceramic material on the second region can be jointly acted upon by the second light-curing unit 102 and the forming support table 2 to form a ceramic shell mold.

[0044] This is the preferred material of the slurry of the present invention, that is, preferably a ceramic material. Ceramic materials refer to a class of inorganic non-metallic materials made from natural or synthetic compounds through shaping and high-temperature sintering. It has the advantages of high melting point, high hardness, high wear resistance, oxidation resistance, etc. It can be used as a structural material and a cutting tool material. Due to certain special properties of ceramics, it can also be used as a functional material to complete a ceramic structure with different internal structures (such as different porosities, etc.) in one-piece molding.

[0045] In some embodiments, it further includes a printing support table lifting drive mechanism 5. The printing support table lifting drive mechanism 5 is supported at the lower end of the forming support table 2. The printing support table lifting drive mechanism 5 can drive the forming support table 2 to move up and down, and can control the up and down movement distance and speed of the forming support table 2. Through the structure of the printing support table lifting drive mechanism of the present invention, it can effectively support the forming support table, drive the forming support table to move up and down, and control the distance and speed of its up and down movement, thereby effectively controlling the thickness of the single-layer product printed, etc.

[0046] The printing support table lifting drive mechanism of the present invention preferably includes a motor, a lead screw, and a slider, which are used to drive the printing support table to move up and down to ensure the single-layer printing accuracy of printing and the height direction accuracy of the formed parts.

[0047] In some embodiments, the printing slot 4 includes a frame structure. There is a through slot structure in the middle of the frame structure. The area of the through slot structure can be coated with slurry, and the through slot structure can receive the scanning light emitted from the light-curing unit 100 below. The printing slot is a frame structure, which can form an internal through slot structure. The through slot structure can be coated with slurry, and the upper part is scanned by the light emitted from the light-curing unit, and the lower part is formed by the upward movement of the forming support table for the slurry. Of course, the through slot structure is preferably multiple, and support ribs can be arranged between adjacent through slot structures to effectively support the slurry.

[0048] In some embodiments, it further includes a slurry scraping system 3, which is arranged in the through groove structure of the printing tank 4 to scrape the slurry in the through groove structure and can also store the slurry. The present invention can also provide the slurry in the through groove structure through the slurry scraping system, scrape a layer of slurry in the through groove structure in the form of scraping, and with the upward pressing of the forming support table and the ultraviolet light scanning above, a 3D printed structure of one layer is formed. The slurry scraping system can also store the slurry to provide the slurry required for 3D printing.

[0049] The slurry scraping system of the present invention preferably includes a U-shaped double-edge scraper, a motor, a lead screw and a slider. The "U-shaped" cavity of the U-shaped double-edge scraper is used to store the slurry and replenish it on the forming surface through the double edges during the scraping process. The motor, lead screw and slider realize the forward and backward constant-speed scraping movement of the scraper.

[0050] In some embodiments, it further includes a frame 1 and a control-display system 6. The light curing unit 100, the printing support table lifting drive mechanism 5 and the control-display system 6 are all arranged on the frame 1. The control-display system 6 is electrically connected to the printing support table lifting drive mechanism 5, the light curing unit 100 and the slurry scraping system 3 respectively.

[0051] The present invention can also provide a support frame for the light curing unit, the forming support table, the printing support table lifting drive mechanism and the control-display system through the frame. The printing support table lifting drive mechanism is connected to the forming support table to control the speed and distance of the movement of the forming support table, so as to control the thickness of the single-layer and multi-layer printing structures. The control-display system can effectively control the thickness of the printing layer, the scanning speed, the scanning power, the change of the scanning path, and can also control how much volume of slurry is provided by the scraping system and the scraping speed, etc., and effectively complete the intelligent and effective control of the light curing 3D printing integrated forming equipment.

[0052] The intelligent control-display system of the present invention includes a data control processor, a display and an input keyboard, which are connected to the frame through a hinge connection. It is connected to the laser, the reflecting galvanometer, the support table lifting drive mechanism and the slurry scraping system, and independently controls the opening, closing and output power of the two lasers; independently controls the angles and the angle change rates of the two reflecting galvanometers; respectively controls the single lifting distance and the distance compensation of the support table lifting drive mechanism, and controls the running speed of the scraper of the slurry scraping system.

[0053] Preferably, the printing powers of the first and second light beams of the present invention are 0-100 nW / cm2;

[0054] Preferably, the ultraviolet light beam scanning speed of the present invention is 0-0.8 m / s;

[0055] Preferably, the scraping speed of the doctor blade in the present invention is 0 - 0.1 m / s;

[0056] Preferably, the single-layer printing thickness in the present invention is 25 - 500 μm. Embodiment

[0057] As Figure 1 shown, a device for one-piece forming by light-curing 3D printing includes: a frame 1, a detachable forming support table 2, a printing tank 4, a driving mechanism 5 for lifting the printing support table, an intelligent control-display system 6, an independent reflecting galvanometer 8 (functioning to control the scanning path and speed of the light beam); a laser 7 (preferably a dual-control ultraviolet laser) and a slurry scraping system 3. The lower part of the frame 1 is fixedly provided with the slurry scraping system 3, the printing tank 4 and the driving mechanism 5 for lifting the printing support table, and the intelligent control-display system 6 is hinged to the outside thereof; the ultraviolet laser 7 and the reflecting galvanometer 8 are fixedly provided on the upper part of the frame 1. The ultraviolet laser 7 and the reflecting galvanometer 8 are installed directly above the frame 1. The driving mechanism 5 for lifting the printing support table is connected to the forming support table 2, installed directly below the frame 1, and can drive the forming support table 2 to move precisely up and down. The intelligent control-display system 6 controls the power and movement speed of the ultraviolet laser 7, the reflecting galvanometer 8 and the driving mechanism 5 for lifting the printing support table.

[0058] Compared with the prior art, the technical advantages of the asynchronous control dual-beam multi-performance ceramic material light-curing 3D printing device and preparation method provided by the present invention are as follows:

[0059] 1. The asynchronous control dual-beam multi-performance ceramic material light-curing 3D printing device provided by the present invention includes: a frame, a forming support table, a slurry scraping system, a printing tank, a driving mechanism for lifting the printing support table, an intelligent control-display system, an ultraviolet laser, and a reflecting galvanometer. Among them, the ultraviolet laser and the reflecting galvanometer are installed directly above the frame. The driving device for lifting the printing support table is connected to the forming support table, installed directly below the frame, and can drive the forming support table to move precisely up and down. The intelligent control-display system controls the power and movement speed of the ultraviolet laser, the reflecting galvanometer and the driving mechanism for lifting the printing support table.

[0060] 2. The working principle of the asynchronous control dual-beam multi-performance ceramic material light-curing 3D printing device provided by the present invention is as follows: By the intelligent control-display system, two ultraviolet lasers and two reflecting galvanometers are respectively controlled to cooperatively control two groups of light beams to cure and form different positions of the ceramic component. By asynchronously controlling the power, scanning speed and scanning path of the two ultraviolet laser beams, the layered structure, pore enrichment region and size of the ceramic material in different regions are differentially controlled, so as to realize the multi-functionalization of different regions in the same printing layer.

[0061] 3. Existing multi-material photocuring 3D printing methods are difficult to achieve multi-material printing on the same printing layer, and the printing of multi-materials requires the preparation of photocuring printing slurries of multiple materials, which is prone to element contamination in different printing areas. The method provided by the present invention realizes the differential preparation of multi-functional ceramic materials in different areas of the same layer through the same slurry.

[0062] The present invention also provides a preparation method for a multi-performance material photocuring 3D printing product, which includes:

[0063] A stirring and drying step of mixing and stirring the material powder and then obtaining a mixed powder by drying;

[0064] A slurry preparation step of adding the above-mentioned mixed powder to a photocuring resin, heating to a preset temperature and then holding and stirring for a preset time to obtain a photocuring 3D printing slurry;

[0065] A 3D printing one-piece forming step of printing the photocuring 3D printing slurry by using the aforementioned photocuring 3D printing one-piece forming equipment to obtain a 3D printing one-piece green body;

[0066] A debinding and sintering step of debinding and sintering the 3D printing one-piece green body to obtain a photocuring 3D printing one-piece component.

[0067] The beneficial effects of the photocuring 3D printing one-piece forming equipment and preparation method provided by the present invention are as follows:

[0068] 1. It realizes the synchronous curing and forming of the double light paths of photocuring 3D printing, making the printing more efficient;

[0069] 2. Since two ultraviolet lasers and two high-precision laser reflection galvanometers constitute two ultraviolet photocuring light paths, which are independently controlled by an intelligent control-display system, it can synchronously perform curing and forming with different laser powers, different scanning paths and different scanning speeds in different areas of the same printing layer, and control the layered structure of the pore distribution in different areas through the power, scanning path and scanning speed, so as to realize the one-piece forming with different performance requirements.

[0070] 3. Since the slurry used to achieve its differential forming is prepared from the same material, the cost and cycle are greatly reduced; during the printing process, there is no need to replace the print head and slurry, avoiding the introduction of other impurity elements in the material, and the product quality is stable and the process is reliable.

[0071] The material of the present invention is preferably a ceramic material, that is, the preparation steps of the multi-performance ceramic material photocuring 3D printing ceramic of the present invention specifically include the following steps:

[0072] (1) Mix and stir the ceramic powder for 2-3 h and dry to obtain a mixed powder;

[0073] (2) Add the obtained mixed powder into the photocurable resin, keep it warm and stir at 80 - 120 °C for 8 - 12 h to obtain a photocurable 3D printing ceramic slurry;

[0074] (3) Use a device for one - piece forming by photocurable 3D printing, set the printing power, printing path, scanning speed of different path segments, doctor blade coating speed and single - layer printing thickness of beam one and beam two, make beam one print the core and beam two print the external shell structure, and layer - by - layer solidify and form the slurry through the 3D printing device to obtain a photocurable 3D printing ceramic core - shell one - piece green body;

[0075] (4) Debind and sinter the photocurable 3D printing ceramic green body obtained in step (3) to obtain a photocurable 3D printing ceramic core - shell one - piece component;

[0076] Further preferably, the preferred embodiment of the preparation steps is as follows:

[0077] The preparation steps of the differential one - piece forming by photocurable 3D printing of the present invention specifically include the following steps:

[0078] (1) Mix and stir the ceramic powder for 2 h and dry it to obtain a mixed powder;

[0079] (2) Add the obtained mixed powder into the photocurable resin, keep it warm and stir at 120 °C for 12 h to obtain a photocurable 3D printing ceramic slurry;

[0080] (3) Use a device for one - piece forming of photocurable 3D printing ceramic core - shell, respectively set the printing paths of beam one and beam two, set the power of beam one as 3.5 nW / cm2, scanning speed as 0.2 m / s, the printing power of beam two as 45 nW / cm2, scanning speed as 0.5 m / s, doctor blade coating speed as 0.02 m / s and single - layer printing thickness as 100 μm, and layer - by - layer solidify and form the slurry through the 3D printing device to obtain a core - shell one - piece formed mold green body with different performances, that is, a multi - performance photocurable 3D printing ceramic green body;

[0081] (4) Debind and sinter the core - shell one - piece formed mold green body obtained in step (3) to obtain a core - shell one - piece formed mold.

[0082] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention. The above is only the preferred implementation manner of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and variations can still be made, and these improvements and variations should also be regarded as within the protection scope of the present invention.

Claims

1. An apparatus for one-piece forming by light-curing 3D printing, characterized in that: Comprising: A forming support table (2), a printing tank (4), and a photocuring unit (100). A slurry is disposed on the printing tank (4), the slurry includes a photocuring resin, the photocuring unit (100) is located above the printing tank (4), the forming support table (2) is located below the printing tank (4) and can move towards the printing tank (4) to form the slurry. During the forming process, the photocuring unit (100) can scan the slurry on the printing tank (4). The photocuring unit (100) is at least two, and different photocuring units act on the slurry in different areas of the printing tank (4), and different photocuring units can provide at least one of different laser powers, different scanning paths, and different scanning speeds to cure and form the slurry in different areas; The printing tank (4) includes a first area and a second area. The photocuring unit (100) is two, including a first photocuring unit (101) and a second photocuring unit (102). The first photocuring unit (101) is opposite to the first area to scan the slurry on the first area, and the second photocuring unit (102) is opposite to the second area to scan the slurry on the second area. At least one of different laser powers, different scanning paths, and different scanning speeds can be provided between the first photocuring unit (101) and the second photocuring unit (102); The slurry on the first area can be jointly acted on by the first photocuring unit (101) and the forming support table (2) to form a first part, and the slurry on the second area can be jointly acted on by the second photocuring unit (102) and the forming support table (2) to form a second part. The porosity of the first part is greater than that of the second part.

2. The device for integrally forming photocuring 3D printing according to claim 1, wherein: The photocuring unit (100) includes a galvanometer scanner (8) and a laser (7). The laser can emit light to the galvanometer scanner (8), and the galvanometer scanner (8) can receive the light emitted by the laser and reflect the light onto the slurry in the printing tank (4) to form a curing light path for curing and forming the slurry; when the photocuring unit (100) is at least two, the galvanometer scanner (8) is at least two, and the laser (7) is also at least two. The galvanometer scanner (8) and the laser (7) are arranged in one-to-one correspondence.

3. The device for integrally forming photocuring 3D printing according to claim 2, wherein: The photocuring unit (100) is an ultraviolet photocuring unit, the laser (7) is an ultraviolet laser, the ultraviolet laser can emit ultraviolet light to the galvanometer scanner (8), and the galvanometer scanner (8) can receive the ultraviolet light emitted by the ultraviolet laser and reflect the ultraviolet light onto the slurry in the printing tank (4).

4. The device for integrally forming photocuring 3D printing according to claim 1, wherein: It further includes a printing support table lifting drive mechanism (5). The printing support table lifting drive mechanism (5) is supported at the lower end of the forming support table (2). The printing support table lifting drive mechanism (5) can drive the forming support table (2) to move up and down, and can control the up and down movement distance and speed of the forming support table (2).

5. The light-curing 3D printing and integrated forming device according to claim 4, wherein: The printing tank (4) includes a frame structure. There is a through-channel structure in the middle of the frame structure. The area of the through-channel structure can be coated with slurry, and the through-channel structure can receive the scanning light emitted from the light-curing unit (100) above.

6. The light-curing 3D printing and integrated forming device according to claim 5, wherein: It further includes a slurry coating system (3). The slurry coating system (3) is arranged in the through-channel structure of the printing tank (4) to be able to coat slurry in the through-channel structure and can also store slurry.

7. The light-curing 3D printing and integrated forming device according to claim 6, wherein: It further includes a machine frame (1) and a control-display system (6). The light-curing unit (100), the printing support table lifting drive mechanism (5) and the control-display system (6) are all arranged on the machine frame (1). The control-display system (6) is electrically connected to the printing support table lifting drive mechanism (5), the light-curing unit (100) and the slurry coating system (3) respectively.

8. A preparation method for a multi-performance material photocuring 3D printing product, characterized in that: Comprising: A stirring and drying step of mixing and stirring the material powder and then obtaining a mixed powder body through drying; A slurry preparation step of adding the above-mentioned mixed powder body to a light-curing resin, heating to a preset temperature and then holding and stirring for a preset time to obtain a light-curing 3D printing slurry; A 3D printing and integrated forming step of using the light-curing 3D printing and integrated forming device according to any one of claims 1-7 to print the light-curing 3D printing slurry to obtain a 3D printing and integrated green body; A debinding and sintering step of performing debinding and sintering on the 3D printing and integrated green body to obtain a light-curing 3D printing and integrated component.

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