A large-size advanced ceramic green body wet forming and drying integrated device

Abstract

The invention discloses a large-size advanced ceramic green body wet forming and drying integrated device, comprising: a mold and an air chamber; the mold comprises: a lower template, a mold frame, an upper template that covers the mold cavity inlet at the top of the mold and can be embedded in the mold cavity from the mold cavity inlet, and a filter layer laid on the surface of the lower template and below the upper template; the lower template is provided with a plurality of first through holes that run through its thickness direction, and the upper template is provided with a plurality of second through holes that run through its thickness direction; the air chamber comprises: an upper opening of the air chamber located at the top, an air inlet connected to the inside of the air chamber, a drain port located at the bottom of the air chamber, and an electronic pressure gauge installed outside the air chamber; the mold is fixedly connected above the air chamber and the lower template covers the upper opening of the air chamber, and the first through hole is connected to the air chamber. The invention introduces compressed air during the drying process to float the wet green body, dry it, and eliminate the friction during the drying process, thereby avoiding the bottom friction caused by shrinkage during the drying process and tearing the green body.

Description

Technical Field

[0001] The present invention relates to the technical field of advanced ceramic body forming and drying, and more specifically, to an integrated device for wet forming and drying of large-sized advanced ceramic bodies. Background Art

[0002] Advanced ceramics have excellent properties such as high strength, high hardness, wear resistance, corrosion resistance and high temperature resistance. They are widely used in machinery, metallurgy, aerospace, energy, medical and electronics, and play an irreplaceable role. With the development of application needs, the size of advanced ceramic components is developing in a larger direction. The molding method is the main factor that determines the performance, manufacturing cost and subsequent machining cost of large-size ceramic components. The molding methods of large-size ceramic components mainly include dry molding and wet molding. Dry molding is represented by axial pressurization and cold isostatic pressing, while wet molding includes grouting, filter pressing and slurry in-situ solidification molding, among which in-situ solidification molding includes injection molding, direct solidification and spontaneous solidification molding.

[0003] Compared with dry forming, the ceramic green body prepared by wet forming has the characteristic of uniform particle packing density, which not only lays the foundation for sintering to prepare ceramics with uniform microstructure, but also helps to reduce the sintering temperature, thereby obtaining ceramic materials with better performance. In addition, the wet forming process equipment investment is small, it is easy to prepare large-sized ceramic green bodies, and the manufacturing cost and subsequent machining cost are low. Therefore, wet forming has become a new development direction for the preparation of large-sized advanced ceramic green bodies. However, wet forming of large-sized green bodies still faces two difficulties: (1) The wet green body has low strength, is easy to deform, and is difficult to remove from the mold for drying. (2) When drying in the mold, due to the certain amount of shrinkage of the green body during the drying process, friction is generated between the green body and the bottom surface of the mold, and the green body is easy to be torn.

[0004] In order to solve the problem of forming and drying large-sized ceramic blanks, the Chinese patent with application number 201911118214.8 proposes a drying tool for gel injection molding of large-sized ceramic blanks, including upper and lower panels and an outer frame, which can be assembled into a cavity, and the ceramic blank is placed in the cavity and there is a uniform gap between the upper and lower panels and the outer frame. A number of spring rolling devices are evenly fixed on the upper and lower panels and the outer frame, and all the spring rolling devices work together to apply uniform elastic constraints to the ceramic blank. During the drying process, by applying uniform elastic constraints to the blank, a certain force is automatically applied to the blank in the opposite direction of the blank deformation, so that the blank is deformed in the opposite direction of the deformation, ensuring uniform shrinkage of the blank and preventing distortion.

[0005] Although the drying tooling of the invention can reduce the friction resistance at the bottom during the drying process to a certain extent, the spring rolling device still has physical contact with the ceramic body, and the body will still have a certain degree of deformation. In addition, since the wet body contains nearly 50 vol% water, its strength is relatively low, similar to tofu. The process of transferring the wet body from the mold to the device is prone to cracks, especially for large-sized bodies of meter size.

[0006] Therefore, how to provide a large-sized advanced ceramic green body wet forming and drying integrated device that can prevent the wet green body from cracking and prevent the green body from deforming during the drying process has become a technical problem that urgently needs to be solved in this field. Summary of the invention

[0007] The object of the present invention is to provide a large-size advanced ceramic green body wet forming and drying integrated device which can prevent the green body from cracking and deforming during the drying process.

[0008] The present invention provides an integrated device for wet forming and drying of large-size advanced ceramic green bodies, comprising: a mold and an air chamber; the mold comprises: a lower mold plate forming the bottom surface of the mold, a mold frame forming the side wall of the mold, an upper mold plate used for sealing the mold cavity inlet at the top of the mold and capable of being embedded in the mold cavity from the mold cavity inlet, and a filter layer laid on the surface of the lower mold plate and below the upper mold plate; wherein the lower mold plate is provided with a plurality of first through holes penetrating the thickness direction thereof, and the upper mold plate is provided with a plurality of second through holes penetrating the thickness direction thereof; the air chamber comprises: an upper opening of the air chamber located at the top thereof, an air inlet communicating with the interior of the air chamber, a drain port located at the bottom of the air chamber, and an electronic pressure gauge installed outside the air chamber; the mold is fixedly connected above the air chamber and the lower mold plate covers the upper opening of the air chamber, and the first through holes are communicated with the air chamber.

[0009] Optionally, the large-size advanced ceramic body wet forming and drying integrated device further includes a compressed air source connected to the air inlet.

[0010] Optionally, a gas pressure regulating mechanism is provided on the gas path for introducing gas into the gas inlet.

[0011] Optionally, the mold frame includes a rectangular mold frame or a circular mold frame; the rectangular mold frame is formed by splicing four sides, and the circular mold frame includes a first mold frame and a second mold frame that are connected to each other; in a top view, the shape of the opening on the air chamber is the same as the shape of the mold frame.

[0012] Optionally, when the mold frame is a rectangular mold frame, the air chamber is a semi-cylindrical structure, its axial direction is horizontal, both axial ends are closed, and the arc surface of the air chamber faces downward; when the mold frame is a circular mold frame, the air chamber is a hemispherical structure, and the spherical surface of the air chamber faces downward.

[0013] Optionally, the mold further comprises a sealing strip; a sealing strip is arranged at the joint of the mold frame; or a sealing strip is arranged between the bottom surface of the mold frame and the lower mold plate; or a sealing strip is arranged between the lower mold plate and the upper edge of the upper opening of the air chamber.

[0014] Optionally, the filter layer includes microporous filter paper, and the pore size of the microporous filter paper is in the same order of magnitude as the particle size in the slurry for preparing the advanced ceramics.

[0015] Optionally, the bottom surface of the mold frame is pressed tightly against the upper surface of the microporous filter paper, and in a top view, the outer edge of the filter paper surrounds the inner edge of the mold frame.

[0016] Optionally, the material of the lower template and the upper template is rust-proof cast iron or aluminum alloy, with a thickness of 10mm to 30mm and a flatness of less than 0.1mm; and / or, the apertures of the lower template and the upper template are 1mm to 3mm, and the hole spacing is 10mm to 20mm.

[0017] Optionally, the mold frame is made of rust-proof cast iron or aluminum alloy, with a height of 50 mm to 100 mm and a width of 20 mm to 50 mm; and / or the inner surface of the mold frame is treated with Teflon hydrophobicity.

[0018] According to the technical content disclosed in the present invention, the following beneficial effects are achieved:

[0019] The invention provides an integrated device for wet forming and drying of large-size advanced ceramic green bodies, comprising: a mold and an air chamber; wherein a plurality of first through holes are provided on the bottom plate of the mold, the first through holes are interconnected with the air chamber, after pouring is completed in the mold, the slurry is solidified in situ to form a wet green body, the moisture in the wet green body can flow into the air chamber from the first through holes through the filter layer under the action of gravity, a drain port is provided at the bottom of the air chamber to discharge the filtered water immediately; after the moisture in the wet green body reaches a preset value, the upper template can be embedded in the mold from the mold cavity entrance and pressed on the upper surface of the wet green body, the upper template is provided with a plurality of second through holes and has a certain air permeability; after the wet green body is formed, there is no need to transfer the wet green body, and it can be directly dried in the mold, thereby avoiding cracks during transportation; during the drying process, the valve of the drain port is closed, compressed air is introduced from the air inlet, and the air pressure in the air chamber is adjusted to float the wet green body and dry it until the drying and shrinkage are completed. Compressed air can float the wet blank and eliminate friction during the drying process, thereby avoiding the bottom friction caused by shrinkage during the drying process and tearing the blank; the upper template is pressed on the upper surface of the wet blank to prevent the uneven air buoyancy from causing the wet blank to deform. A second through hole is left on the upper template to facilitate the evaporation of moisture in the wet blank during the drying process.

[0020] Further features and advantages of the present invention will become apparent from the following detailed description of exemplary embodiments of the present invention with reference to the attached drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The accompanying drawings, which are incorporated in and constitute a part of the specification, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the invention.

[0022] Figure 1 This is a structural diagram of the large-size advanced ceramic green body wet forming and drying integrated device of the present invention.

[0023] Explanation of the accompanying drawings: 1. mold frame; 2. upper template; 21. second through hole; 3. wet blank; 4. microporous filter paper; 5. lower template; 51. first through hole; 6. air chamber; 61. first connecting plate; 7. air inlet; 8. drain outlet; 9. bracket; 91. second connecting plate; 10. sealing strip. DETAILED DESCRIPTION

[0024] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that the relative arrangement of components and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless otherwise specifically stated.

[0025] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0026] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0027] In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not limiting. Therefore, other examples of the exemplary embodiments may have different values.

[0028] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0029] See also Figure 1The present invention discloses an integrated device for wet forming and drying of large-sized advanced ceramic green bodies, comprising: a mold, an air chamber 6, a compressed air source and a bracket 9; the bracket 9 is supported below the air chamber 6 so that a space of a certain height is formed between the bottom of the air chamber 6 and the ground; the mold is fixedly connected above the air chamber 6, and holes are opened on the bottom plate of the mold so that the internal space of the mold and the internal space of the air chamber 6 are interconnected. After the slurry is poured into the mold, the slurry is solidified in situ to form a wet green body 3. Under the action of gravity, the moisture in the wet green body 3 can flow into the air chamber 6 from the holes on the bottom plate of the mold to complete the initial dehydration of the slurry. After the wet green body 3 is dehydrated to form, compressed gas can be introduced into the air chamber 6. Since the air chamber 6 is interconnected with the internal space of the mold, the compressed gas can lift the wet green body 3 under the action of air flotation, so that the wet green body 3 is separated from the mold without physical contact during the drying process, thereby preventing the bottom friction caused by shrinkage during the drying process from tearing the green body.

[0030] Specifically, the mold includes: a lower template 5 forming the bottom surface of the mold, a mold frame 1 forming the side wall of the mold, an upper template 2 used to seal the mold cavity inlet at the top of the mold and capable of being embedded into the mold cavity from the mold cavity inlet, and a microporous filter paper 4 laid on the surface of the lower template 5 and under the upper template 2.

[0031] In this example, the mold frame 1 is a rectangular mold frame 1, which is formed by splicing four sides and fastening them with screws. A sealing strip is provided between the two spliced ​​sides to seal the gap caused by the splicing to prevent the slurry from leaking out from the connection of the mold frame 1. The material of the lower mold plate 5 is cast iron or aluminum alloy treated with rust prevention, with a thickness of 10mm to 30mm and a flatness of less than 0.1mm. The material of the mold frame 1 is cast iron or aluminum alloy treated with rust prevention, with a height of 50mm to 100mm and a width of 20mm to 50mm; the inner surface of the mold frame 1 is treated with Teflon hydrophobic treatment.

[0032] The outer contour of the lower template 5 is the same as the outer contour of the mold frame 1 in shape and size. The mold frame 1 is placed on the upper surface of the lower template 5. The outer contour of the lower template 5 is aligned with the outer contour of the mold frame 1. A sealing strip 10 is also provided between the bottom surface of the mold frame 1 and the upper surface of the lower template 5, and is fastened by screws. The lower template 5 is provided with a plurality of first through holes 51 that run through the thickness direction thereof. The plurality of first through holes 51 are distributed in an array on the lower template. Specifically, the aperture of the first through hole 51 is 1 mm to 3 mm, and the hole spacing is 10 mm to 20 mm. During the in-situ curing process of the slurry, part of the water in the slurry can leak out through the first through hole 51 under the action of gravity, thereby increasing the solid content of the wet blank 3 and helping to reduce the moisture content and drying shrinkage of the blank.

[0033] The filter layer uses microporous filter paper 4, and the pore size of the microporous filter paper 4 is in the same order of magnitude as the particle size in the slurry for preparing advanced ceramics. The size of the microporous filter paper 4 is larger than the inner edge size of the mold frame 1. In a top view, the outer edge of the filter paper surrounds the inner edge of the mold frame 1, so that the bottom surface of the mold frame 1 is pressed tightly against the upper surface of the filter paper edge of the microporous filter paper 4, avoiding wrinkles and corner fluctuations of the filter paper inside the mold frame 1, and preventing the slurry from directly flowing into the first through hole 51 of the multi-lower mold plate 5 to cause leakage.

[0034] The material of the upper template is cast iron or aluminum alloy with rust-proof treatment, with a thickness of 10mm to 30mm and a flatness of less than 0.1mm; the upper template 2 is a rectangular plate with the same shape as the inner edge of the mold frame 1, and the size of the plate is the same as or slightly smaller than the inner edge of the mold frame 1. The upper template 2 is provided with a plurality of second through holes 21 that penetrate through the thickness direction thereof, and the plurality of second through holes 21 are distributed in an array on the upper template, specifically, the aperture of the second through holes 21 is 1mm to 3mm, and the hole spacing is 10mm to 20mm.

[0035] The microporous filter paper below the upper template is made of the same material as the microporous filter paper on the surface of the lower template, and has the same size as the cross-sectional size of the upper template.

[0036] The air chamber 6 is a semi-cylindrical structure, the axial direction of which is horizontal, and the two axial ends are closed. The arc surface of the air chamber 6 faces downward, and the top of the air chamber 6 forms an upper opening of a rectangular structure. An air inlet 7 communicating with the inside of the air chamber 6 is provided on one side wall of the air chamber 6, and the air inlet 7 is used to connect the compressed air source. A drain port 8 is provided at the bottom of the air chamber 6 and a water valve is installed for draining water; a first annular connecting plate 61 is extended outwardly in the horizontal direction at the upper opening, and the width of the first connecting plate 61 is 30mm to 60mm; a second annular connecting plate 91 is also extended outwardly in the horizontal direction at the top of the bracket 9, and the first connecting plate 61 is stacked on the second connecting plate 91; from a top view, the shape of the opening on the air chamber 6 is the same as the shape and size of the inner edge of the mold frame 1, and the lower mold plate 5 is stacked on the first connecting plate 61; connecting holes are provided on the first connecting plate 61 and the second connecting plate 91, and the positions of the connecting holes correspond to the positions of the inner threaded holes of the lower mold plate, and the bolts pass through the two connecting holes in sequence and cooperate with the inner threaded holes to fasten the mold, the air chamber 6 and the bracket 9. A sealing strip 10 is provided between the lower template 5 and the upper opening of the air chamber 6. After the mold, the air chamber 6 and the bracket 9 are fastened together, the lower template 5 completely covers the upper opening of the air chamber 6, and the first through hole 51 and the air chamber 6 are connected to each other.

[0037] The compressed air source is connected to the air inlet 7 , and an air pressure regulating mechanism is provided on the air path for introducing the gas into the air inlet 7 . The air pressure regulating mechanism uses a pressure regulating valve to control the pressure of the compressed air entering the air chamber 6 and the pressure inside the air chamber 6 .

[0038] In some embodiments, the mold frame 1 is a circular mold frame 1, and the circular mold frame 1 includes a first mold frame 1 and a second mold frame 1 that are connected to each other; preferably, the first mold frame 1 and the second mold frame 1 are two semicircular frames that are radial to each other; correspondingly, when the mold frame 1 is a circular mold frame 1, the air chamber 6 is a hemispherical structure, and the spherical surface of the air chamber 6 faces downward. An air inlet 7 is opened on the side wall of the air chamber 6, and a drain outlet 8 is opened at the bottom of the air chamber 6.

[0039] The method of using the large-size advanced ceramic green body wet forming and drying integrated device of this embodiment is as follows:

[0040] First, the mold, microporous filter paper 4, air chamber 6, compressed air source and bracket 9 are assembled according to the aforementioned connection method; then, in-situ curing ceramic slurry is prepared, the slurry is evenly mixed by ball milling, and then vacuum degassing is performed, and the degassed slurry is poured into the assembled mold, and a film is covered on the upper surface of the mold, and it is left to stand for in-situ curing and dehydration shrinkage; the drain port 8 at the bottom of the air chamber 6 is opened to drain the escaped water; after dehydration, a gap is generated between the wet blank 3 and the mold frame 1, and a utility knife is used to cut the gap between the wet blank 3 and the mold frame 1 Enter, cut the filter paper, and separate the filter paper from the mold frame 1; the solidified wet blank 3 has a certain hardness, and a layer of microporous filter paper 4 and an upper mold plate 2 with a second through hole 21 are placed on the surface of the wet blank 3; compressed air is introduced into the air chamber 6 through the air inlet 7 on the air chamber 6, and the pressure of the compressed air is controlled by the pressure regulating valve to make the wet blank 3 slightly suspended, thereby reducing the drying shrinkage friction at the bottom of the wet blank 3 and facilitating the discharge of moisture at the bottom; the pressure in the air chamber 6 is greater than the total weight of the wet blank 3 and the upper mold plate 2 divided by the internal area of ​​the mold frame 1. During the drying process, the weight of the wet blank 3 decreases due to the evaporation of moisture, and the pressure in the air chamber 6 decreases slightly. The opening of the pressure regulating valve is adjusted according to the value of the electronic pressure gauge set on the air chamber, thereby adjusting the air floating height of the blank. Control the ambient temperature and humidity, and the wet blank 3 is dried in a suspended state for 1 to 2 days to complete the constant speed drying, and the shrinkage of the wet blank 3 is basically completed. Stop ventilation, remove the upper template 2 on the surface of the green body, the microporous filter paper 4 under the upper template and the mold frame 1 on the side, and the green body enters the speed reduction drying stage. By reducing the ambient humidity and improving the drying efficiency, after 2 to 4 days of drying, the moisture in the wet green body 3 is basically discharged and the drying is completed.

[0041] Embodiment 1:

[0042] The present embodiment selects an aluminum alloy plate with a length of 1300mm, a width of 600mm, and a thickness of 30mm as the mold bottom plate, i.e., the lower template, and drills a small hole with a diameter of 1mm on the lower template 5, with a hole spacing of 10mm. Drill M10 internal threaded holes around the edges of the aluminum alloy plate. Select rust-proof cast iron as the mold frame, with a height of 50mm and a width of 50mm. Drill through holes in the vertical direction of the mold frame, and the position corresponds to the position of the threaded holes on the lower template. The through hole size is larger than the threaded hole diameter. M6 threaded holes are drilled at the mold frame joint, and Teflon hydrophobic treatment is performed on the inner surface of the mold frame. Select microporous filter paper with an aperture of 0.5 micron and a thickness of 0.5mm as the slurry filtration layer, with a filter paper length of 1240mm and a width of 540mm. Use 3mm stainless steel to make a semi-cylindrical air chamber, with an air chamber edge width of 50mm. Drill through holes at the edge of the air chamber, and the position corresponds to the position of the threaded holes on the lower template. Place the lower template of the porous aluminum alloy on the laboratory table, lay microporous filter paper on the lower template, and then assemble the mold frame on the filter paper. Use 0.5mm sealing strips between the mold frames and connect them with screws. Lay 0.5mm sealing strips 10 on the inner edge of the bottom of the mold frame, and then use screws to firmly connect the mold frame and the lower template from top to bottom. Lay 0.5mm sealing strips 10 on the inner side of the upper surface of the air chamber edge, place the assembled mold on the air chamber, and use screws to firmly connect the air chamber and the lower template from bottom to top. Pour 56% volume solid content of water-based alumina slurry with in-situ curing characteristics into the mold, leave it for 12 hours, the slurry gels to form a wet blank, and put a layer of microporous filter paper and the upper template. Exhaust the moisture in the air chamber, and pass compressed air into the air chamber through the air inlet. When the electronic pressure gauge on the air chamber shows that the pressure in the air chamber reaches 20kPa, the wet blank is seen floating. Control the humidity of the drying environment to 85%, the temperature to 25℃, dry for 36 hours, and stop ventilation. The microporous filter paper and the upper template and the side mold frame on the surface of the blank were removed, and the drying efficiency was improved by reducing the ambient humidity to 60%. After 3 days of drying, the moisture in the wet blank was basically discharged, and the drying was completed. The alumina blank with a size of 1171mm×488mm×30mm prepared by the device of this embodiment was intact without deformation or cracks.

[0043] Embodiment 2:

[0044] This embodiment is similar to the embodiment 1, except that the lower mold plate is a circle with a diameter of 1300 mm, the mold frame is composed of two semicircular pieces, the air chamber is a hemispherical shell, and the upper mold plate is a circular plate with a thickness of 20 mm. The alumina blank with a diameter of 1171 mm×30 mm produced by the device of this embodiment is complete without deformation or cracks.

[0045] In summary, the large-size advanced ceramic green body wet forming and drying integrated device provided by the present invention makes full use of the in-situ gelation characteristics of the slurry in-situ curing forming system. The device can simultaneously realize the gelation, dehydration shrinkage, air flotation drying and temperature and moisture control drying of the large-size green body, significantly reducing the risk of cracking during the drying process of the large-size green body. A porous lower template and a microporous filter paper are used as the bottom mold for slurry molding. During molding, part of the water in the slurry can be leaked out through the microporous filter paper and the porous bottom plate under the action of gravity, thereby increasing the solid content of the wet green body and helping to reduce the moisture and drying shrinkage of the green body. At the same time, the small holes are used for ventilation, and compressed air is used to float the wet green body to eliminate the friction during the drying process, thereby avoiding the bottom friction caused by shrinkage during the drying process and tearing the green body. During the air flotation drying process, a porous upper template is used to press on the upper surface of the wet green body to avoid the occurrence of deformation of the wet green body caused by uneven air buoyancy. At the same time, a second through hole is left on the plate, which is conducive to the evaporation of water in the wet green body during the drying process, and improves the uniformity of the wet green body above and below during the drying process.

[0046] Although some specific embodiments of the present invention have been described in detail by way of example, it will be appreciated by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present invention. It will be appreciated by those skilled in the art that the above embodiments may be modified without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A large-size advanced ceramic green body wet forming and drying integrated device, characterized in that: include: molds and air chambers; The mold comprises: a lower mold plate forming the bottom surface of the mold, a mold frame forming the side wall of the mold, an upper mold plate used for covering the mold cavity entrance at the top of the mold and capable of being embedded into the mold cavity from the mold cavity entrance, and a filter layer laid on the surface of the lower mold plate and under the upper mold plate; wherein the lower mold plate is provided with a plurality of first through holes penetrating the thickness direction thereof, and the upper mold plate is provided with a plurality of second through holes penetrating the thickness direction thereof; the inner surface of the mold frame is subjected to Teflon hydrophobic treatment; The air chamber comprises: an air chamber upper opening located at the top thereof, an air inlet connected to the interior of the air chamber, a drain outlet located at the bottom of the air chamber, and an electronic pressure gauge installed on the outside of the air chamber; The mold is fixedly connected above the air chamber and the lower mold plate covers the upper opening of the air chamber, and the first through hole is connected to the air chamber; The large-size advanced ceramic body wet forming and drying integrated device also includes a compressed air source, which is connected to the air inlet; the compressed air can lift the wet body in the mold, so that the wet body is separated from the mold without physical contact during the drying process, preventing the bottom friction caused by shrinkage during the drying process from tearing the body.

2. The large-size advanced ceramic green body wet forming and drying integrated device according to claim 1 is characterized in that: An air pressure regulating mechanism is arranged on the air path for introducing the gas into the air inlet.

3. The large-size advanced ceramic green body wet forming and drying integrated device according to claim 1 or 2, characterized in that: The mold frame includes a rectangular mold frame or a circular mold frame; The rectangular mold frame is formed by splicing four sides, and the circular mold frame includes a first mold frame and a second mold frame that are butted against each other; In a top view, the shape of the opening on the air chamber is the same as the shape of the mold frame.

4. The large-size advanced ceramic green body wet forming and drying integrated device according to claim 3 is characterized in that: When the mold frame is a rectangular mold frame, the air chamber is a semi-cylindrical structure, the axis direction of which is horizontal, the two axial ends are closed, and the arc surface of the air chamber faces downward; When the mold frame is a circular mold frame, the air chamber is a hemispherical structure, and the spherical surface of the air chamber faces downward.

5. The large-size advanced ceramic green body wet forming and drying integrated device according to claim 3 is characterized in that: The mold also includes a sealing strip; The sealing strip is provided at the joint of the mold frame; Or, the sealing strip is provided between the bottom surface of the mold frame and the lower mold plate; Alternatively, the sealing strip is provided between the lower template and the upper edge of the upper opening of the air chamber.

6. The large-size advanced ceramic green body wet forming and drying integrated device according to claim 1 or 2, characterized in that: The filter layer comprises microporous filter paper, and the pore size of the microporous filter paper is in the same order of magnitude as the particle size in the slurry for preparing the advanced ceramics.

7. The large-size advanced ceramic green body wet forming and drying integrated device according to claim 6, characterized in that: The bottom surface of the mold frame is pressed tightly against the upper surface of the microporous filter paper, and in a top view, the outer edge of the microporous filter paper surrounds the inner edge of the mold frame.

8. The large-size advanced ceramic green body wet forming and drying integrated device according to claim 1 or 2, characterized in that: The material of the lower template and the upper template is cast iron or aluminum alloy treated with rust prevention, with a thickness of 10 mm to 30 mm and a flatness of less than 0.1 mm; And / or, the hole diameters of the lower template and the upper template are 1 mm to 3 mm, and the hole spacing is 10 mm to 20 mm.

9. The large-size advanced ceramic green body wet forming and drying integrated device according to claim 1 or 2, characterized in that: The mold frame is made of rust-proof cast iron or aluminum alloy, with a height of 50 mm to 100 mm and a width of 20 mm to 50 mm.

Images