34 results about "Ceramic molding" patented technology

A wall-mounted flush toilet includes a ceramic toilet main body including a bowl configured to receive waste and a discharge trap having an inlet connected to a lower part of the bowl and configured to discharge waste from within the bowl, the ceramic toilet main body further includes a skirt that covers outer shells of the bowl and the discharge trap from sides of the outer shells and a rear end formed rearward of the skirt and configured to be fixed to a wall, and the rear end includes a firing pedestal that functions as a pedestal grounded during a firing process in a ceramic molding process.

The utility model discloses a ceramic die-casting forming die capable of reducing porosity. The ceramic die-casting forming die comprises a fixed die, a casting die, a section die and a plurality of side punch assemblies arranged on the periphery of the fixed die. A die cavity, a punch groove and an ejector pin air hole are formed in the section die, and a spraying pump used for spraying a release agent is arranged on the top face of the casting die. The side punch assembly comprises a guide rail base, a control rod, a sliding base and a punch block, and an exhaust hole is formed in the punch block. In the working process, after primary die casting is completed, the punch block moves in the punch groove to achieve secondary compaction, residual gas in pug is exhausted, an exhaust channel is formed by combining the exhaust hole and the ejector pin air hole, and the porosity in a ceramic forming part is effectively reduced. And the release agent spraying pump is used for atomizing and spraying before the mold is closed, so that the demolding effect is improved. The device is compact in structure, has the functions of secondary compaction, exhaust and demolding, and remarkably improves the forming quality and compactness of ceramic products.

To provide a washbasin that can reliably prevent cracks and breaks caused by shrinkage of the ceramic itself during the drying and firing processes of the ceramic molding. [Solution] The washbasin 1 of the present invention has a bowl portion 4, a bottom portion 6 that forms the bottom surface of the bowl portion, and a mounting portion 10 that protrudes downward from the lower surface of the bottom portion and is formed in the circumferential direction and is placed on a base 8 during drying or firing of the ceramic molding. The mounting portion, when viewed from the front, has a first straight portion 12 that extends horizontally from left to right with a first width d1, a second straight portion 14 that extends horizontally from front to back with a second width d2, and a corner portion 16 that bends from the first straight portion to the second straight portion with a third width d3. When viewed from the bottom, the first radius of curvature r1 of the inner edge of the corner portion is greater than the second radius of curvature r2 of the outer edge.

This utility model discloses a ceramic integrated molding device for ceramic processing, including a base, several columns on the base, a common top seat on the top of the columns, a hydraulic cylinder on the top seat, a pressure plate on the telescopic end of the hydraulic cylinder, a mold head on the bottom end of the pressure plate, and a pneumatic cylinder on the base. In this utility model, through the rotational connection between the first mold and the second mold and the telescopic shaft of the pneumatic cylinder, and the movement of the first positioning shaft and the second positioning shaft within two inclined grooves, when the pneumatic cylinder extends, the first and second positioning shafts, guided by the V-shape of the two inclined grooves, achieve the opening effect of the first and second molds at that location, thereby achieving the demolding effect after ceramic molding. Simultaneously, the extension of the pneumatic cylinder drives the first and second molds to move, pushing the molded ceramic towards the outside of the device, effectively avoiding the risk of manual removal from inside the device and improving operational safety.

The utility model belongs to the technical field of white corundum production, and particularly relates to an anti-splashing protection device in a white corundum production process, which comprises an anti-splashing protection box, a ceramic diversion trench is fixed at one end of the anti-splashing protection box, and the ceramic diversion trench is obliquely arranged; a sliding rail is fixed to the bottom of the splash-proof protection box, a sliding block is slidably installed on the top of the sliding rail, an assembling plate is fixed to the top of the sliding block, a ceramic forming mold is placed above the assembling plate, and when the assembling plate moves into the splash-proof protection box, the ceramic forming mold is located below the lower end of the ceramic flow guide groove. The anti-splashing protection box capable of fully surrounding the ceramic forming mold is arranged, and a water curtain is constructed on the inner wall of the anti-splashing protection box, so that molten materials can be quickly cooled and caked and fall outside the ceramic forming mold while splashing molten materials are blocked, the inner wall of the anti-splashing protection box does not need to be cleaned by shutdown, and the service life of the anti-splashing protection box is prolonged. And secondary sputtering is avoided while a good protection effect is achieved, and the safety coefficient is higher.

A method for producing a dense perovskite ceramic shaped body containing an alkaline earth metal element, at least one element selected from Ti, Zr and Hf, and oxygen, and having a relative density of 60% or more, the method comprising a contact reaction step in which a precursor shaped body containing a gel containing at least one oxide selected from Ti, Zr and Hf and water alone, and a liquid containing a hydroxide of an alkaline earth metal element are brought into contact. The obtained shaped body is a collection of crystal domains (2) of a perovskite ceramic crystal (1), the crystal domains (2) being connected to each other.

The utility model discloses a ceramic modeling combined die which comprises a bottom frame, an outer die is fixedly connected to the upper surface of the bottom frame, a sleeve is movably connected to the inner wall of the lower end of the outer die, a gear is fixedly installed on the outer wall of the sleeve, and a limiting mechanism is arranged on the inner wall, on the side of the gear, of the bottom frame. A lifting rod is movably connected to the inner wall of the sleeve, and a base is fixedly installed at the upper end of the lifting rod. An inner mold is arranged in the outer mold, a rack and a stabilizing frame are fixed to the outer walls of the two sides of the upper end of the inner mold respectively, a support is fixedly connected to the outer wall, on the side of the rack, of the outer mold, a stabilizing sleeve is fixedly installed on the outer wall, on the side of the stabilizing frame, of the outer mold, and a rotary knob is movably arranged on the inner wall of the support. According to the ceramic modeling combined mold, the size of the cavity can be conveniently adjusted according to requirements, so that ceramic parts with different sizes can be conveniently molded by the mold, and the usability of the mold is improved.

The present invention provides a powdered composition for ceramic molding that can be prepared simply and with low energy, and that can be densely packed even at low pressure when manufacturing molded products. [Solution] The ceramic molding powder composition according to the embodiment is used to manufacture ceramic electrical and electronic components or ceramics with a fine shape, and contains cellulose nanofibers and inorganic particles with an average particle diameter of 0.005 μm or more and 2 μm or less, and has a moisture content of 20% by mass or less.

The utility model relates to the technical field of throwing machines, in particular to a ceramic forming throwing machine, which is favorable for enhancing the work coordination ability among students, does not need to be electrified, is controllable in rotating speed and is safer. Comprising two bottom beams, a connecting plate, a supporting vertical plate, a working plate, a mounting plate, a rotary forming assembly, a driving assembly, a reset component and a seat holding pulling assembly, the right ends of the two bottom beams are connected through the connecting plate, the left ends of the two bottom beams are connected with the supporting vertical plate through screws, and the right side of the top of the supporting vertical plate is connected with the working plate; a mounting plate is connected between the right side wall of the supporting vertical plate and the right side of the working plate, the right side of the working plate is inclined, the right end of the working plate is connected with the two bottom beams, the rotary forming assembly is rotationally mounted on the working plate, the driving assembly is connected with the rotary forming assembly, the reset component is mounted below the working plate, and the reset assembly is connected with the driving assembly. The seat pulling assembly is located on the right side of the bottom beam.

The BNNTs reinforced ceramic slurry comprises ceramic powder, a monomer / cross-linking agent combination, a ceramic powder surface modifier, boron nitride nanotubes, a dispersing agent, a sintering aid, a photoinitiator and a light absorbing agent, the ceramic powder is aluminum oxide, and the particle size D50 of the ceramic powder is 0.02-1 [mu] m; the diameter range of the boron nitride nanotube is 10 to 100 nm; the monomer / cross-linking agent is acrylic acid, the ceramic powder surface modifier is a KH series, and the dispersing agent is a DisperBYK series; the sintering aid is Y2O3, the photoinitiator is Irgaure819, and the light absorbing agent is Tinuvin 171; the ceramic forming method based on the reinforced ceramic slurry comprises five steps. The slurry prepared by the invention can effectively offset high viscosity brought by TMPTA and ceramic powder, improves material dispersibility, reduces viscosity, enhances mechanical strength of a cured green body, ensures long-term storage stability of the slurry and Z-axis resolution of printing equipment, reduces friction force and agglomeration among ceramic powder particles, and improves the quality of the ceramic powder. And the mechanical property of the finished ceramic can be improved.

The utility model provides a celadon throwing device, and relates to the technical field of ceramic forming equipment, the celadon throwing device comprises a rack, a throwing wheel disc is rotatably connected to the rack, a mud blocking basin is mounted on the rack, the mud blocking basin comprises a mounting bottom wall and a circumferential side wall which are integrally formed, the section of the circumferential side wall is in a circular arc shape, and the mounting bottom wall and the circumferential side wall are integrally formed. A plurality of welding frame grooves are formed in the circumference of the circumferential side wall, cyclone mechanisms are installed in the welding frame grooves, each cyclone mechanism comprises an air pump, a cyclone cavity and a three-way connecting pipe, a plurality of air blowing holes are formed in each cyclone cavity, the forming direction of the air blowing holes is parallel to the tangential direction of the circumferential side wall, and the air pumps are communicated with the cyclone cavities. High-speed circulation can be formed on the inner side of the circumferential side wall through high-pressure gas generated by the air pump, an included angle can be formed between the flying direction of slurry and the circumferential side wall, the splashing direction of the slurry after the slurry impacts the circumferential side wall is close to the circumferential side wall, and the slurry is prevented from splashing towards the rotating shaft inside.

The application relates to the field of ceramic forming, in particular to a bacteriostatic and easy-to-clean ceramic preparation equipment and process. The structure comprises a rolling forming equipment, the rolling forming equipment comprises a machine body and a rotating seat for driving a mold to rotate on the machine body, a discharging assembly is movably arranged on the machine body, the discharging assembly comprises a scraper and a contact wheel in transmission connection with the scraper, the contact wheel is used for contacting the rotating mold, the rotating contact wheel drives the scraper to move away from the center of the mold, the moving assembly comprises an output seat, and the output seat drives the discharging assembly to move vertically. When the rolling operation is carried out, the contact wheel of the discharging assembly is rotationally connected with the mold, then the scraper is driven to move away from the mold through a speed reduction gear set, the scraper is gradually pulled away horizontally in the overflow stage and the setting stage until the scraper is pulled out, the situation that the mud and the scraper are adhered and pulled away when the scraper is directly pulled away is avoided, and the integrity of the top surface of the formed mud is ensured.

The present application belongs to but is not limited to the technical field of composite materials, and particularly relates to an aluminum alloy-Al2O3 ceramic composite material and a preparation method thereof. The aluminum alloy-Al2O3 ceramic composite material is an aluminum alloy matrix wrapped with a continuous gradient minimum surface ceramic skeleton structure. The specific surface area of the skeleton is 0.48 mm ‑1 , and the volume porosity reaches 60%, and the interior is interconnected. The high-speed centrifugal infiltration method designed in the present application uses centrifugal force to accelerate the infiltration of the aluminum alloy liquid matrix. Compared with the traditional preparation method, the process is more rapid, the infiltration can be completed in a short time, the production efficiency is high, and the process structure is simple and reasonable. The ceramic skeleton green body designed in the present application reduces the problems encountered in the traditional ceramic forming process. The porosity is continuously gradient configured, at the same time, the aluminum alloy is filled between the layers of the ceramic skeleton and is also continuously gradient distributed. The three-dimensional constraint provided by the aluminum alloy effectively improves the strength and toughness of the ceramic.

The utility model discloses a ceramic forming mould quick demoulding auxiliary device, which comprises a bottom plate and a mould body, the edge of the upper surface of the bottom plate is fixedly connected with a support rod, the upper end part of the support rod is fixedly provided with the mould body, and the end part of the lower surface of the mould body is movably connected with a support column. A safety mechanism is arranged at the lower end of the supporting column, the upper surface of a transmission seat on the side of the supporting rod is connected with the lower surface of the mold body through a reset spring, a transmission rod is fixedly installed at the end of the upper surface of the transmission seat, and a top plate is fixedly connected to the upper end of the transmission rod; a stop plate is fixedly arranged at the center of the lower surface of the pedal plate, and rollers are mounted at four corners of the lower surface of the pedal plate. According to the rapid demolding auxiliary device for the ceramic forming mold, a user can conveniently operate the device through feet to conduct ceramic demolding, and the user can conveniently conduct other work through the two hands during ceramic demolding.

The invention discloses a method for gel casting of zirconium oxide and zirconium oxide ceramic, and belongs to the technical field of ceramic forming. The zirconia ceramic is obtained by injection molding of a premixed solution with the solid content of 70-80 wt% and the viscosity of 30-100 mPas; the premixed liquid comprises zirconium oxide powder and a curing agent, and the curing agent comprises chitosan and sodium alginate. The preparation method is applied to gel casting of the zirconia ceramic, solves the problem that the high-density and uniform-density zirconia ceramic cannot be prepared by adopting a gel casting process due to the fact that the zirconia slurry with high solid content and low viscosity cannot be prepared, and has the advantages of environmental friendliness, simplicity in operation, high solid content of the slurry, good flowability and the like. And the prepared ceramic has the characteristics of high density and good uniformity.

The invention belongs to the field of porous ceramic forming, and relates to a porous ceramic, a preparation method thereof and a porous ceramic heater, spherical aluminum powder, metal oxide, a ceramic framework material and an organic pore-forming agent are weighed according to a specific proportion, uniformly mixed and dried to obtain ceramic mixed powder, the mass percentage of the spherical aluminum powder is 20-30%, the mass percentage of the metal oxide is 20-30%, the mass percentage of the ceramic framework material is 20-30%, and the mass percentage of the organic pore-forming agent is 20-30%. The metal oxide accounts for 35%-55%, the ceramic framework material accounts for 15%-40%, and the organic pore-forming agent accounts for 5%-10%; mixing the ceramic mixed powder with a binder, and uniformly stirring to prepare ceramic slurry; preparing a ceramic green body from the ceramic slurry through an injection molding process; and sintering the ceramic green body at high temperature to obtain the porous ceramic. According to the technical scheme provided by the invention, the porosity and strength of the porous ceramic can be improved, and the shrinkage rate of the porous ceramic is reduced.

This invention relates to a multi-layer continuous grouting molding equipment, belonging to the field of ceramic molding technology. It includes a pressure system, a grouting system, a pressure frame, several layers of molds, and a layer-by-layer cutting system. Each layer of molds is stacked on the pressure frame, forming a grouting channel that runs vertically through each mold. The layer-by-layer cutting system includes a vacuum rigid tube, a vacuum reference block, a shrinkage bladder, several ejection devices, several hydraulic power devices, and a sealing ring. The sealing ring is compatible with an iron ring. The vacuum rigid tube extends into the grouting channel. Each vacuum reference block is installed on the outside of the vacuum rigid tube. The shrinkage bladder is installed on the outside of the vacuum reference block. Each ejection device is slidably installed along the circumference of the vacuum reference block and is located inside the shrinkage bladder. Each hydraulic power device is slidably installed on the vacuum reference block and is connected to the ejection device via a transmission connection. The telescopic end of the hydraulic power device is located on the upper side of the vacuum reference block, ensuring that the molding pressure of each layer of molds is equal.

To provide a technology that offers advantages in manufacturing ceramic structures with high mechanical strength and chemical resistance, as well as crack repairability, through additive manufacturing. [Solution] A powder for ceramic molding containing one or more types of oxide particles is provided, characterized in that it contains at least Al, Y, and Si, and the elemental ratio of Y to Si, Y / Si, satisfies 25 / 75 ≤ Y / Si ≤ 95 / 5.

The utility model relates to the field of ceramic production equipment, in particular to an aluminum oxynitride transparent ceramic forming device which comprises a base, a lower die arranged at the upper end of the base, a bottom die vertically arranged in the lower die in a sliding mode, an installation cavity formed in the base, a first hydraulic cylinder vertically arranged in the installation cavity, and a second hydraulic cylinder arranged at the lower end of the first hydraulic cylinder and connected with the bottom die. A plurality of supporting columns connected with the base are arranged on the top plate, a second hydraulic cylinder is vertically and fixedly arranged on the top plate, a pressing die is connected to the lower end of the second hydraulic cylinder, a stand column is arranged on the side face of the base, a cross beam is rotationally arranged at the upper end of the stand column and connected with a telescopic beam extending horizontally, and a third hydraulic cylinder is vertically connected to the end of the telescopic beam; compared with manual material taking, the automatic material taking device has the advantages that the automation degree is high, and the occupied manpower is reduced.

The application discloses a ceramic forming device, system and method, and relates to the technical field of forming of semiconductor high-purity ceramic materials. The ceramic forming device comprises a shell, a first forming layer and a second forming layer. The first forming layer and the second forming layer are arranged in the shell in a spaced manner. The two opposite sides of the first forming layer and the second forming layer are surrounded by the inner wall of the shell to form a forming cavity for injecting slurry. The side of the second forming layer, which is away from the first forming layer, is surrounded by the inner wall of the shell to form a vacuum cavity for vacuumizing. The vacuum cavity is communicated with the forming cavity through the second forming layer. The side of the first forming layer, which faces the second forming layer, is flexible. The second forming layer is water-permeable so that the slurry is dehydrated to the vacuum cavity. The vacuum cavity is vacuumized to form a negative pressure. The slurry in the forming cavity is dehydrated under the action of the negative pressure through the second forming layer, and the water is dehydrated to the vacuum cavity. The ceramic body is formed in the forming cavity. The application solves the problem of poor product quality, uniformity and compactness of the traditional wet forming technology in the ceramic forming process.

The utility model provides a rotating speed adjustable throwing device for exquisite ceramic processing, which belongs to the technical field of ceramic processing equipment and comprises a base, a speed regulating component is fixedly mounted at the top of the base, and a heat dissipation component is arranged between the base and the speed regulating component. By arranging the speed regulation assembly, stepped speed regulation in the exquisite ceramic forming process is rapidly matched with working procedures, three rotating speed modes of low speed, medium speed and high speed are formed through combined meshing of a plurality of sets of gears of different specifications, the power regulation component can push the gear sets to be rapidly switched, a reliable guarantee is provided for fine forming of exquisite ceramic, and the working efficiency of the exquisite ceramic forming machine is improved. By arranging the heat dissipation assembly, efficient heat dissipation and stable operation guarantee of the speed regulation equipment are achieved, heat generated by gear meshing and power component operation can be guided out through the heat dissipation channels in the peripheral side of the protection structure, and the active heat dissipation device at the top of the base is matched with the filtering protection structure, so that the consistency of ceramic green body forming is guaranteed.

The invention belongs to the technical field of adhesives for ceramics, and particularly relates to a water-based adhesive for nano ceramic forming as well as a preparation method and application of the water-based adhesive. The water-based adhesive for nano ceramic forming is prepared from the following raw materials in percentage by mass: 20-30% of an acrylic monomer, 10-30% of an initiator, 10-30% of a solvent and the balance of water. 15-30% of long side chain unsaturated carboxylic acid; 2.5% to 4% of hydroxyl acrylamide; 15-25% of a water-soluble plasticizer; 0.5 to 2% of unsaturated carboxylic acid vinyl ester; 25-35% of a hydrophilic solvent; and 0.2%-0.5% of an initiator. The water-based adhesive for nano-ceramic forming provided by the invention is a novel water-based adhesive which not only can endow ceramic green bodies with high strength and high flexibility, but also can keep excellent thermal decomposition characteristics and is stable in performance, and the invention further provides a preparation method of the water-based adhesive for nano-ceramic forming. The invention further provides application of the water-based adhesive in nano ceramic forming.

The invention belongs to the technical field of ceramic forming equipment, and particularly relates to small table type constant-pressure ceramic slip casting experimental equipment which comprises a support body, a lower pressing plate is fixedly connected to the support body, and a mold clamping mechanism, a slurry storage mechanism and a slip casting pipeline are installed on the support body. The mold clamping mechanism is used for clamping a ceramic mold placed on the lower pressing plate, the slurry storage mechanism comprises a plurality of material storage tanks installed on the support body, the multiple material storage tanks store different kinds of slurry respectively, the lower ends of the multiple material storage tanks are fixedly connected with discharging pipes, valves are installed on the discharging pipes, and the slurry injection pipeline can be communicated with any discharging pipe. And an adjustable sealing mechanism is mounted between the grouting pipeline and the discharging pipe. By adopting the rotating disc type multi-storage-tank structure to be matched with the telescopic communicating pipe and the inflatable rubber sealing ring, the sealing performance between the discharging pipe and the grouting pipeline is improved while rapid switching of the storage tanks is achieved, slurry leakage in the material changing process is reduced, the device is suitable for comparing the performance difference of slurry of different formulas or different concentrations in an experiment, and the experiment efficiency is improved. And the flexibility and experiment efficiency of the equipment in scientific research are improved.

This invention provides an additive manufacturing equipment and method for forming composite laser ceramics. The additive manufacturing equipment for forming composite laser ceramics includes: a ceramic forming device, a forming mold assembly, and a powder placement system. The forming mold assembly is assembled in the ceramic forming device, and the powder placement system is also assembled in the ceramic forming device. The forming mold assembly is used to form composite laser ceramics and includes an upper pressure block, a lower pressure block, and a middle forming cavity mold. The powder placement system includes a three-dimensional motion module platform and a multi-material partitioned placement structure. This additive manufacturing equipment for forming composite laser ceramics overcomes the limitations of traditional single-crystal preparation in terms of size and configuration, enabling composite forming with different substrate materials, different doped materials, or different doping concentrations. It also overcomes the limitations of gain medium configuration or size, achieving free and controllable distribution of doped materials and concentrations in laser ceramics.

The application belongs to the technical field of ceramic adhesive and specifically relates to a water-based adhesive for nano ceramic forming and a preparation method and application thereof. The water-based adhesive for nano ceramic forming comprises the following raw materials and is prepared according to the mass percentage: 20-30% of acrylic monomer, 15-30% of long side chain unsaturated carboxylic acid, 2.5-4% of hydroxy acrylamide, 15-25% of water-soluble plasticizer, 0.5-2% of unsaturated carboxylic acid vinyl ester, 25-35% of hydrophilic solvent and 0.2-0.5% of initiator. The water-based adhesive for nano ceramic forming can not only give the ceramic green body high strength and high flexibility, but also keep excellent thermal decomposition characteristics and stable performance of the novel water-based adhesive. The application further provides a preparation method of the water-based adhesive for nano ceramic forming and application of the water-based adhesive in nano ceramic forming.

To provide a mold release film for molding that can easily release a ceramic molded body without using a conventional alginic acid mold release film and that does not cause a defect such as a crack or a split during firing of the molded body, and a ceramic molding method using the same.SOLUTION: A web-like sheet made of an insoluble nanofiber aggregate is used as a mold release film formed on an inner wall surface of a mold. If necessary, an insoluble powder particle is allowed to coexist with an insoluble nanofiber. At this time, a value obtained by dividing a volume of the insoluble powder particle by a volume of the insoluble nanofiber falls within a range of 0.2 to 20.SELECTED DRAWING: Figure 2

The invention discloses a preparation method of bone china with high thermal stability, and relates to the technical field of ceramic forming products. A formula of a bone china green body of the bone china with high thermal stability comprises the following components in parts by mass: 45-55 parts of bone ash, 12-18 parts of quartz, 8-12 parts of potassium feldspar, 10-15 parts of kaolin, 3-6 parts of aluminum oxide, 1-4 parts of zirconium oxide, 1-4 parts of lanthanum oxide, 1-2 parts of barium carbonate, 0.5-1.5 parts of epoxy resin and 1-2 parts of a silane coupling agent. Compared with the prior art, the compactness is remarkably improved, micropores in the green body are reduced, and the structure is more uniform and compact.

This invention provides a laser molding powder that enables stable molding and allows for the production of three-dimensional objects with guaranteed molding accuracy, as well as a method for using the same powder. [Solution] A powder for ceramic molding to obtain a molded object by repeatedly sequentially sintering or melting and solidifying powder in a laser light irradiation area, wherein the powder comprises a plurality of compositions, at least one of the compositions is an absorber that exhibits relatively higher absorption to the laser light than the other compositions, and at least a portion of the absorber changes to other compositions that exhibit relatively lower absorption to the laser light upon irradiation with the laser light, and a method for using the powder.

This invention relates to the field of advanced ceramic forming equipment technology, and discloses a pressureless silicon carbide preform extrusion forming device and a preform extrusion forming method, which includes, in sequence along the material extrusion direction, a pre-compacting conveying section, a diversion and layering gas release section, a primary slow-release vacuum chamber, a secondary high-efficiency degassing vacuum chamber, a re-converging compaction and welding section, a pressure equalization and flow stabilization section, a shaped forming transition channel section, and a shaped die forming section. The pre-compacting conveying section compacts the upstream molding material into a continuous column; the diversion and layering gas release section breaks down the continuous column into multiple thin-layer streams, increasing the free surface area and shortening the internal gas escape path; the multi-layer thin-layer streams undergo gradient vacuum degassing through a primary slow-release vacuum chamber and a secondary high-efficiency degassing vacuum chamber, and the degassing stability and efficiency are improved through anti-carrying material structures and flow-guiding renewal structures; the re-merging, compacting, and welding section achieves smooth merging, compaction, and interface welding of the multi-stream streams; the pressure equalization and flow stabilization section and the irregular forming transition channel section achieve smooth transition of the material flow to complex irregular cross-sections, and finally, the material is extruded through the irregular die forming section to form a pressureless silicon carbide irregular wet blank. This invention can effectively improve the degassing efficiency, interface welding quality, and flow balance of high solids content pressureless silicon carbide extruded material, and reduce defects such as internal porosity, delamination, weak welding interfaces, missing material at edges and corners, and dimensional fluctuations in the wet blank. It is suitable for the continuous and stable forming of pressureless silicon carbide irregular components.

This invention provides a binder composition for ceramic molding, comprising 15-95% by mass of component (A) and 5-85% by mass of component (B). Component (A) is a copolymer comprising 70-99 mol% of structural units from formula (1), 1-30 mol% of structural units from formula (2), and 0-29 mol% of other structural units, and having a weight-average molecular weight of 50,000-1,000,000. Formula (1) CH2=CR 1 -COO-R 2 In equation (1), R 1 R represents a hydrogen atom or a methyl group. 2 Representing alkyl groups with 1 to 8 carbon atoms, formula (2) CH2=CR 3 -COO-R 4 In equation (2), R 3 R represents a hydrogen atom or a methyl group. 4 Represents a hydroxyalkyl group having 1 to 8 carbon atoms and 1 to 2 hydroxyl groups; Component (B): The compound represented by formula (3), formula (3)R 5 O-(EO) p -(PO) q In equation (3), R 5 It is an alkyl group with 9 carbon atoms, EO is vinyl oxide, PO is propylene oxide, p is the average number of moles of EO added and p = 3 to 9, q is the average number of moles of PO added and q = 2 to 4, and p / q = 1.0 to 3.0.