110results about "Slip casting moulds" patented technology

The invention relates to the technical field of injection molding molds, in particular to a porous mold for ceramic slip casting, which comprises a porous ceramic slip casting mold for ceramic slip casting and a support frame for supporting the porous ceramic slip casting mold, the porous ceramic slip casting mold is composed of an upper mold and a lower mold which are distributed up and down, a mold plate is arranged above the upper mold, and a mold cover for sealing is fixedly connected between the mold plate and the upper mold; a transmission structure for lifting the upper die is installed on the supporting frame, the transmission structure is composed of a driving motor, a lead screw and a transmission part, the lead screw is rotatably installed on the supporting frame and penetrates through the interior of the die plate in a threaded mode, the transmission part is installed between the driving motor and the lead screw, and functional mechanisms are arranged on the side wall of the lower die and the supporting frame. The functional mechanism comprises an air exhaust structure and a material ejection structure. Air in the mold can be exhausted, defects such as bubbles and air holes are avoided, and the appearance quality and performance of products are improved.

The present invention relates to the technical field of ceramic green body production, and more particularly, to a slip casting device and a slip casting production line. A slip casting device, the slip casting device includes a frame, a pressurizing structure, a slip casting assembly, and a plurality of molding assemblies; the plurality of molding assemblies are all slidably connected to the frame in the same direction; the pressurizing structure is connected to the frame, and the pressurizing structure is used to apply an external force to the plurality of molding assemblies so that any two adjacent molding assemblies are closed; the slip casting assembly is used to inject slurry into the closed molding assemblies to form a formed blank in the two closed molding assemblies. This slip casting device can improve the efficiency of slip casting and reduce the labor intensity of workers.

Methods and apparatus are provided for pressure casting ceramic bodies. Methods and apparatus are provided for rapid ejection of cast ceramic bodies from a mold. A mold is described that has an impermeable cavity surface to provide dry release of the cast body. Ceramic bodies produced by the methods and apparatus have smooth, non-tacky surfaces after ejection from the mold.

The present invention discloses a large-size alumina ceramic forming method, aiming to solve the problem that it is difficult to successfully form long strips with long sizes and certain internal features by dry pressing or cold isostatic pressing. The invention includes the following steps: S1, mixing alumina powder, dispersant and water to obtain a mixed slurry; S2, placing the mixed slurry in a vacuum degassing machine for vacuum degassing to remove bubbles in the mixed slurry; S3, loading the mixed slurry into a pressure grouting machine; S4, injecting the mixed slurry into a porous resin mold through the pressure grouting machine for continuous pressure molding; S5, drying after demoulding to obtain a ceramic green body; S6, loading the ceramic green body into a sintering furnace for firing and molding. This patent application uses pressure grouting to form ceramic products, which can form ceramic products with large sizes and internal features, overcoming the current situation that large-size products are difficult to form and internal features are difficult to process.

To provide a method for producing an oxide sintered body, in which a content of impurities is significantly reduced.SOLUTION: A method of the present invention for producing an oxide sintered body uses, as a raw material, an oxide containing two or more elements selected from In element, Ga element, and Zn element and satisfies the following conditions (a) to (c). An oxide having a purity of 6 N or more is used as the raw material. A grinding and mixing medium is formed of an oxide containing no element other than the elements selected as the raw material. Ultrapure water is used as a dispersion medium to form a slurry.SELECTED DRAWING: None

A toilet assembly includes a flush engine having a bowl, a sump at a lower portion of the bowl, and a trapway extending from the sump. The toilet assembly further includes a first polymeric layer at least partially surrounding the flush engine, the first polymeric layer comprising a foam. The toilet assembly further includes a second polymeric layer provided on the first polymeric layer, the second polymeric layer comprising resin.

The present disclosure concerns a method of fabricating a curved 2D membrane comprising providing a curved polymer template on a support, flowing a solution of 2D material through the curved polymer template in order to form 2D multilayers on the curved polymer template and separating the 2D multilayers from the curved polymer template in order to form the curved 2D membrane. The curved 2D membrane is 10 characterised by a hyperbolic paraboloid curvature. The curved 2D membrane is characterised by a multi-layered lamellar morphology.

The invention relates to a slurry discharging device for ceramic production, and belongs to the technical field of ceramic production, and the slurry discharging device comprises an operation table, an operation plate is arranged on the operation table, a bottom plate is arranged below the operation plate, a bearing plate is arranged on one side of the bottom plate, a first electric cylinder is arranged on one side of the bottom plate, a push plate is fixedly arranged on an output shaft of the first electric cylinder, and a spray head is fixedly arranged on the push plate; a release agent source is fixedly arranged on the operation table, a communicating pipe is fixedly arranged between the spray head and the release agent source, the bottom plate is sleeved with an outer ring forming pipe, an inner ring forming column is arranged in the outer ring forming pipe, a connecting rod is arranged on the operation plate, and a lifting assembly for driving the connecting rod to ascend and descend and a moving assembly for horizontally moving are arranged on the operation plate; a shell is fixedly arranged on the operation plate, a rotating shell is arranged in the shell, a flow guide pipe is connected between the rotating shell and the release agent source, a plurality of injection pipes are fixedly arranged on the upper surface of the rotating shell, and a plurality of injection holes are formed in the side walls of the injection pipes.

The application relates to the technical field of ceramic production, in particular to a grouting equipment for daily-use ceramic production. The application provides the grouting equipment for daily-use ceramic production which can produce qualified ceramics. The grouting equipment for daily-use ceramic production comprises a mounting plate frame, a ceramic mold, a liquid storage tank, a liquid outlet, a liquid guide pipe and a shaking mechanism, the ceramic mold is placed in the mounting plate frame, the left side of the mounting plate frame is connected with the liquid storage tank, the upper side of the mounting plate frame is provided with the liquid outlet, the ceramic mold is located directly below the liquid outlet, the liquid guide pipe is in communication between the liquid outlet and the liquid storage tank, and the mounting plate frame is provided with the shaking mechanism for shaking the ceramic mold. The air in the piston cylinder is flowed into the ceramic mold through the air guide pipe by starting the motor and moving the limiting frame left and right to drive the ceramic mold and the raw materials to shake, so that the effect of shaking and pressurizing is realized, the raw materials are uniformly distributed in the ceramic mold, and the qualified production rate is improved.

The invention discloses a silicon carbide wear-resistant bushing blank forming method, which belongs to the technical field of silicon carbide, and comprises the working procedures of mold core design, mold manufacturing, slip casting, demolding, blank repair and inspection and the like, in the slip casting process, slurry is slowly injected into a cavity of an assembled mold along a casting head, so that the slurry can be conveniently discharged from an air hole of the cavity of the mold; grouting is stopped when the slurry rises to the upper edge of the casting head, unsolidified slurry is poured out through the casting head to complete one-time slurry return after lower part slurry is sucked to reach the wall thickness, then quantitative slurry is injected into the mold through the casting head again, the casting head is blocked through a baffle provided with a ventilation pipe, then the mold is inverted, the end, stretching into a cavity, of the ventilation pipe penetrates through the slurry, and the mold is sealed; the pressure inside and outside the cavity is balanced, the blank is prevented from deforming, the baffle is opened after the wall thickness of the specified size is achieved after a period of time, and unsolidified slurry is poured out through the casting head to complete secondary slurry returning.

The invention relates to a method for manufacturing a part made of composite material, comprising the arrangement of a fibrous preform (10, 20) in the impregnation chamber (110, 210) of a mould (100, 200), the impregnation chamber (110, 210) being closed by a flexible membrane (130, 230) separating the impregnation chamber (110, 210) from a compaction chamber (120, 220), an impregnation fluid (1000, 3000) being injected into the impregnation chamber (110, 210) and a compression fluid (2000, 4000) being injected into the compaction chamber (120, 220), the compression fluid (2000, 4000) being a liquid in which the value of the density is between 60% and 125% of the density of the impregnation fluid (1000, 3000).

To provide an unitized crucible assembly for holding a silicon melt for forming a silicon ingot, and a method for forming the same.SOLUTION: A method comprises a porous crucible mold having a channel network 20 including a bottom channel 30, an outer side wall channel 32 extended from the bottom channel and a central dam channel 34 extended from the bottom channel. Slip slurry may be added to the channel network; the liquid carrier of the slip slurry may be drawn in the mold; and the obtained green body may be sintered for forming a crucible assembly.SELECTED DRAWING: Figure 3

Tool and method for infiltrating a slip into a textile preform Tool for infiltrating (100) a slip (120) into a textile preform (110) comprising: - a mold (102) which comprises an impregnation chamber (103) comprising on one of its faces a filtration element (130) for a liquid phase (131) of the slip intended to receive a first face (113) of a textile preform (110), the impregnation chamber being closed by a counter-mold (101) located opposite the filtration element;and - an outlet vent (132) present on the mold and configured to remove a filtrate (131) from the filtration element at a removal pressure (P2), characterized in that the tooling also comprises a system for circulating a slip comprising an inlet port (141) and an outlet port (142), the circulation system being configured to circulate the slip in the impregnation chamber from the inlet port to the outlet port at a circulation pressure (P1) higher than the removal pressure (P2). Figure for abstract: Fig. 1;

This disclosure is directed to an apparatus comprising a manifold removably coupled to a mold, wherein ceramic slurry is indirectly fed into the cavity of the mold. More specifically, ceramic slurry is directly fed into an exterior portion of the mold and subsequently indirectly fed into the mold cavity. In certain aspects, the mold cavity can further comprise one or more inserts for producing ceramic articles having smaller dimensions and / or of irregular shape by casting by using a two-directional ceramic slurry feed. In some aspects, excess ceramic slurry from the casting process can be recycled for subsequent runs via a pitch. Also disclosed herein is a method for pressure casting using an indirect feed.

The method for producing an oxide sintered body according to the present invention uses, as a raw material, an oxide including two or more elements selected from In, Ga, and Zn, the method satisfying (a) to (c). (a) An oxide having a purity of 6N or more is used as the raw material. (b) The medium for pulverization and mixing is formed from an oxide including no element other than the elements selected as the raw material. (c) Slurry is obtained by using ultrapure water as a dispersion medium.

The present invention relates to a method for producing a component made of a composite material, the method comprising at least: - obtaining a mold, the mold comprising: (i) a fibrous texture (6); (ii) a granular filter layer (5a) located between the drainage surface (SD) of the texture and the permeable discharge surface (4), the granular filter layer comprising a powder of filter particles (50a); and (iii) an element (5b) for holding the granular layer, which element is different from the layer and is located between the permeable discharge surface and the drainage surface, - introducing a suspension (1) comprising matrix particles (PM) into a liquid medium (ML) through an introduction surface (SI) of the fibrous texture different from the drainage surface, the liquid medium passing through the drainage surface, the granular filter layer and the holding element and being discharged through the permeable discharge surface, the matrix particles being retained by the granular filter layer in the pores of the fibrous texture, and - forming a component made of a composite material by forming a matrix from the matrix particles in the pores of the fibrous texture and forming a surface layer of the component from the filter particles.

The invention relates to a method for manufacturing a part made of composite material, said method comprising: - the arrangement of a fibrous preform (10) in a mould comprising an impregnation chamber (201), the impregnation chamber (201) being closed by a membrane (230) separating the impregnation chamber (201) from a compaction chamber (202), - the injection of an impregnation fluid (5) into the impregnation chamber (201), and the injection of a compression fluid (6) into the compaction chamber (202) so as to apply pressure to the membrane (230), - the aspiration of the compression fluid (6) present in the compaction chamber (202), the method being characterized in that the surface (230b) of the membrane (230) present on the side of the compaction chamber (202) comprises a plurality of grooves (235a, 235b).

The method for producing an oxide sintered body according to the present invention is a method for producing an oxide sintered body using, as a starting material, an oxide containing two or more elements selected from the group consisting of In element, Ga element, and Zn element, the method satisfying the following (a)-(c). (a) The raw material is an oxide having a purity of 6N or more. (b) The grinding / mixing medium is formed from an oxide that does not contain an element other than the element selected as the starting material. And (c) slurrying using ultrapure water as a dispersion medium.

The invention discloses a three-dimensional ceramic tile and a preparation method thereof. The invention discloses a three-dimensional grouting structure for ceramic tiles, and relates to the technical field of ceramic tile processing. Comprising an upper die; the grouting mechanism and the upper mold are arranged up and down, a grouting cavity is formed after mold closing, a through hole is formed in one side of the top of the upper mold, a grouting pipe is fixedly connected into the through hole, and the grouting pipe is communicated with the grouting cavity; the grouting mechanism comprises at least one lower mold assembly, and a three-dimensional protruding rib structure is arranged on the working face of the lower mold assembly. Through the arrangement of the convex ribs, a grid structure formed by the convex ribs can directly impress three-dimensional textures in a ceramic tile green body, a traditional plane grouting or later engraving process is replaced, the working procedures are reduced, the cost is reduced, meanwhile, the anchoring columns can form a convex structure in the ceramic tile, the mechanical meshing force of the ceramic tile and a binding material is enhanced, and the mechanical performance of the ceramic tile is improved. And the paving firmness is improved.

The invention relates to a method for densifying a fibrous texture made of ceramic material used in injection equipment comprising: - a mould cavity defined between a mould and a counter-mould, the mould cavity defining an internal space; and - a membrane comprising a stiffened zone, the membrane being intended to be placed between a fibrous texture present in the mould cavity and the counter-mould, and the stiffened zone of the membrane having a Young's modulus greater than 200 GPa, the method comprising: - placing (110) a predensified fibrous texture in the mould cavity, the predensified fibrous texture having corrugations on the surface and placing the membrane on the predensified fibrous texture in such a way that the stiffened zone of the membrane is in contact with the peaks of the corrugations of the predensified fibrous texture; - closing (120) the injection equipment by placing the counter-mould on the membrane and applying a compaction pressure (Pcompaction) to the membrane so as to keep the stiffened zone of the membrane in contact with the peaks of the corrugations of the predensified fibrous texture; and - densifying (130) the predensified fibrous texture by infiltrating a slip into the porosity of the predensified fibrous texture, the slip being injected into the mould chamber laterally to the membrane at an injection pressure (Pinjection) such that the difference in pressure between the compaction pressure and the injection pressure is between 0.5 x 10^5 Pa and 6 x 10^5 Pa.

The invention relates to the technical field of ceramic processing, and provides a multi-angle adjustable ceramic automatic centrifugal drying grouting machine, comprising a frame shell, a bearing assembly, a centrifugal support assembly, a radial clamping assembly, an axial limit assembly, a transmission chain, a gas drying pipeline and a grouting system, wherein the bearing assembly comprises a bearing frame and a transmission shaft, the centrifugal support assembly comprises a support part and a piston, an object storage shell and a central tube surface are respectively provided with an air outlet and an air inlet, the support part comprises a object storage shell, an air outlet, a central tube, a curved guide rail and an air inlet, a spherical protrusion is slidably connected in the curved guide rail, the transmission shaft is transmission-connected to the central tube, the radial clamping assembly comprises a U-shaped block, a threaded rod and a locking nut, the threaded rod is fixedly connected to the U-shaped block, the locking nut is threadedly connected to the threaded rod, the axial limit assembly comprises a limit rod, the limit rod passes through the U-shaped block, and the threaded rod passes through the limit rod, and has the characteristics of positioning the ceramic mold, uniform and stable drying airflow and good molding quality.

The invention discloses a silicon carbide wear-resistant bushing blank forming method, which belongs to the field of silicon carbide technology and includes core design, mold making, grouting forming, demoulding, blank repair and inspection and other processes. In the grouting forming process, slurry is slowly injected into the mold cavity of an assembled mold along a pouring riser to facilitate the discharge of air holes in the mold cavity. The grouting is stopped when the slurry rises to the upper edge of the pouring riser. After the slurry intake at the lower part reaches the wall thickness, the unsolidified slurry is poured out through the pouring riser to complete a primary slurry return. Then, a certain amount of slurry is re-injected into the mold through the pouring riser, the pouring riser is blocked by a baffle plate equipped with a vent pipe, and then the mold is inverted so that one end of the vent pipe extending into the mold cavity passes through the slurry to balance the pressure inside and outside the mold cavity and prevent the blank from deforming. After a period of time, when the wall thickness reaches a specified size, the baffle plate is opened, and the unsolidified slurry is poured out through the pouring riser to complete a secondary slurry return.

The invention relates to a method for densifying a fibrous texture made of ceramic material used in injection equipment comprising: - a mould cavity defined between a mould and a counter-mould, the mould cavity defining an internal space; and - a membrane comprising a stiffened zone, the membrane being intended to be placed between a fibrous texture present in the mould cavity and the counter-mould, and the stiffened zone of the membrane having a Young's modulus greater than 200 GPa, the method comprising: - placing (110) a predensified fibrous texture in the mould cavity, the predensified fibrous texture having corrugations on the surface and placing the membrane on the predensified fibrous texture in such a way that the stiffened zone of the membrane is in contact with the peaks of the corrugations of the predensified fibrous texture; - closing (120) the injection equipment by placing the counter-mould on the membrane and applying a compaction pressure (Pcompaction) to the membrane so as to keep the stiffened zone of the membrane in contact with the peaks of the corrugations of the predensified fibrous texture; and - densifying (130) the predensified fibrous texture by infiltrating a slip into the porosity of the predensified fibrous texture, the slip being injected into the mould chamber laterally to the membrane at an injection pressure (Pinjection) such that the difference in pressure between the compaction pressure and the injection pressure is between 0.5 x 10^5 Pa and 6 x 10^5 Pa.

A method for manufacturing a part made of composite material, includes the arrangement of a fibrous preform in the impregnation chamber of a mold, the impregnation chamber being closed by a flexible membrane separating the impregnation chamber from a compaction chamber, an impregnation fluid being injected into the impregnation chamber and a compression fluid being injected into the compaction chamber, the compression fluid being a liquid in which the value of the density is between 60% and 125% of the density of the impregnation fluid.

The present invention provides a composition comprising solid particles of CaO, SiO, MgO, and Al2O3, and the use of the composition in making a mold. [Selected Figure] Figure 3A

The invention relates to the technical field of toilet production equipment, in particular to a slip casting device and method for a toilet blank, the slip casting device comprises a forming mechanism, the forming mechanism comprises a machining table, electric telescopic rods are fixedly connected to the two sides of the top of the machining table, a lower mold is arranged at the top of the machining table, and side molds are arranged on the two sides of the lower mold; the outer side of the side mold is fixedly connected with the output end of the electric telescopic rod, and a liquid inlet is formed in the top of the side mold; the air drying mechanism comprises a fan, the fan is located at the top of the lower mold, ceramic slurry is injected into the forming mechanism at high pressure, so that a closestool blank is formed preliminarily, the air drying mechanism is started to conduct multi-directional air drying on the preliminarily formed closestool blank, the wind power in the initial air drying process is small, and the wind power in the later air drying process is improved; and during air drying, the dehumidifying mechanism is used for dehumidifying the blown-out air, and meanwhile, the blown-out air can be heated, so that the air drying efficiency is improved.

The present invention relates to a method for densifying a fibrous structure made of a ceramic material used in an injection device, the injection device comprising: - a cavity defined between a mold and an opposing mold, the cavity defining an internal space; and - a film comprising a reinforcing zone, the film being disposed between the fibrous structure placed in the cavity and the opposing mold, the reinforcing zone of the film having a Young's modulus greater than 200 GPa, the method comprising: - placing (110) a pre-densified fibrous structure in the cavity, the pre-densified fibrous structure having corrugations on its surface, and placing the film on the pre-densified fibrous structure such that the reinforcing zone of the film contacts the peaks of the corrugations of the pre-densified fibrous structure; - closing (120) the injection device by placing the opposing mold on the film and applying a pressing pressure (P 压紧 ) to keep the reinforcing zone of the film in contact with the peaks of the corrugations of the pre-densified fibrous structure; and - densifying (130) the pre-densified fibrous structure by infiltrating a slurry into the pores of the pre-densified fibrous structure, the slurry being injected laterally into the cavity under an injection pressure (P 注射 ) with respect to the film, such that the pressure difference between the pressing pressure and the injection pressure is between 0.5 x 10 5 Pa and 6 x 10 5 Pa.

Methods and apparatus are provided for pressure casting ceramic bodies. Methods and apparatus are provided for rapid ejection of cast ceramic bodies from a mold. A mold is described that has an impermeable cavity surface to provide dry release of the cast body. Ceramic bodies produced by the methods and apparatus have smooth, non-tacky surfaces after ejection from the mold

The present application relates to the technical field of ceramic manufacturing, and particularly relates to a gypsum mold with an internal structure ceramic body and a forming method thereof; the mold comprises an internal structure mold and an external main mold, the internal structure mold is used for manufacturing an internal structure model process green body, and the internal structure model process green body is placed in the external main mold and processed into a ceramic product green body; the present application provides a gypsum mold design and forming method of an internal structure ceramic product green body, the external main mold and the internal structure model are reasonably split, gypsum molds are respectively designed, a ceramic clay body mold with an internal structure is obtained, and a complex internal structure can be realized in a ceramic product.