A molding die for a ceramic crucible

Abstract

The present invention relates to the technical field of ceramic product forming molds, and specifically discloses a forming mold for a ceramic crucible, which mainly includes an outer mold component and an inner mold component. The outer mold component includes a mold barrel that can rotate horizontally, and the mold barrel is composed of a barrel bottom and two semi-cylindrical walls with symmetrical structures, and the two semi-cylindrical walls can be adjusted to the two sides of the barrel bottom; the inner mold component includes a mold core that can move up and down, and the mold core can extend into the mold barrel to form a mold cavity. The mold core is composed of a core column and a sleeve, and the side of the core column is evenly distributed with side holes, and a bottom hole is opened at the lower end. In the initial state of the mold core, the side holes are blocked by the sleeve, and the sleeve moves upward to connect the side holes with the mold cavity. The forming mold of this ceramic crucible can significantly improve the processing efficiency of blank forming and reduce production costs. The formed blank has low water content, high dimensional accuracy, uniform density, and good density, which significantly improves the product quality of the ceramic crucible and is suitable for the processing and production of cylindrical ceramic crucibles of various sizes.

Description

Technical Field

[0001] The invention relates to the technical field of ceramic product forming molds, in particular to a forming mold for a ceramic crucible. Background Art

[0002] At present, in the production process of ceramic crucibles, the commonly used molding methods mainly include grouting and gelling. The grouting method is to inject the prepared ceramic slurry into the gypsum mold, and rely on the water absorption of the gypsum mold to gradually discharge the water in the slurry and solidify it, so as to obtain the green body of the ceramic crucible; this molding process has a long curing time, a slow demoulding speed, and a low overall production efficiency; due to factors such as the water absorption of the gypsum mold and the fluidity of the slurry, the size accuracy of the green body formed by grouting is usually low; the external force applied to the green body during the molding process is small, the structure is relatively loose, and the density is poor, resulting in a low strength of the processed ceramic crucible. The gelling method is to add additives such as organic monomers and catalysts to the ceramic slurry, so that the slurry undergoes an in-situ polymerization reaction after being injected into the mold to form a gel with a three-dimensional network structure; this molding process requires precise control of the chemical composition and reaction conditions in the slurry, and has extremely high requirements for process operation and equipment function. The technical difficulty is relatively large, which significantly increases the production cost of ceramic crucible products. It is usually only used to process ceramic crucible products for special purposes and has poor applicability.

[0003] Therefore, it is of great significance to develop and design a molding die for a ceramic crucible with high processing efficiency, good green body molding quality and low processing cost. Summary of the invention

[0004] In order to overcome the shortcomings of the prior art, the present invention provides a forming mold for a ceramic crucible, the core component of which is composed of a mold barrel and a mold core that cooperate with each other, the mold barrel is composed of multiple components assembled and can rotate horizontally, the mold core can move vertically and has an integrated filling function; in the actual production process, mud with a low water content is used as the material for making the green body, and the mold core is used for filling, thereby ensuring the continuous progress of mold closing, filling, molding and demolding, simplifying the process links of green body molding, significantly improving the processing efficiency of green body molding, and reducing production costs; the green body is gradually formed under the action of high pressure and rotation, and the green body after molding has low water content, high dimensional accuracy, uniform density, and good density, thereby improving the product quality of the ceramic crucible.

[0005] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0006] A molding die for a ceramic crucible, comprising an outer mold component and an inner mold component, characterized in that:

[0007] The outer mold assembly includes a mold barrel that is cylindrical in an initial state, the mold barrel is supported by a rotating seat and can rotate horizontally, and an annular step is provided on the inner diameter side of the upper end of the mold barrel; the mold barrel is composed of a barrel bottom and two semi-cylindrical walls with symmetrical structures, the barrel bottom is fixedly connected to the rotating seat, the two semi-cylindrical walls are movably connected to the rotating seat, and the two semi-cylindrical walls can be adjusted to both sides of the barrel bottom, so that the mold barrel reaches a separated state from the initial state;

[0008] The inner mold assembly includes a mold core that is cylindrical in an initial state, and the mold core is supported by a sliding seat and can adjust its position within a vertical stroke; when the mold core is at the lower end of the stroke, it extends into the mold barrel to form a mold cavity, and when the mold core is at the upper end of the stroke, it is located above the mold barrel; the mold core is composed of a core column and a sleeve sleeved outside the core column; the core column is fixedly connected to the sliding seat, the upper part of the core column is connected to a mud material input port, the side part is evenly distributed with a plurality of side holes, and the lower end is provided with a bottom hole, and a flow channel connecting the mud material input port with the side holes and the bottom hole is provided inside the core column; the sleeve can slide up and down along the core column, and in the initial state of the mold core, the side hole is blocked by the sleeve, and the upward movement of the sleeve can connect the side hole with the mold cavity, and the mold core is switched to a filling state;

[0009] The central axis and the rotation axis of the mold cylinder are coincident with the central axis of the mold core.

[0010] The molding die of the ceramic crucible uses a clay material with a low water content as a blank making material, and the clay material input port is connected to a pressure vessel containing the clay material. The following steps can be used to make the blank:

[0011] Step 1: Mold closing; adjust the mold barrel and the mold core to the initial state, move the mold core to the lower end of the stroke, and then the mold core enters the mold barrel to form a mold cavity;

[0012] Step 2: Filling: Adjust the mold core to the filling state, use the pressure vessel to input the clay into the clay input port, and the clay enters the mold cavity through the side hole and the bottom hole under the driving of pressure, so that the clay fills the mold cavity; during the filling process, the rotating seat is used to drive the mold barrel to rotate at a high speed to improve the sufficiency and uniformity of the filling;

[0013] Step 3: Molding: Adjust the mold core to the initial state, use the rotating seat to drive the mold barrel to rotate at high speed, at this time, the mold core and the blank rotate relative to each other, and use the smooth sleeve to shape the inner wall of the blank;

[0014] Step 4: Demolding; eliminate the input pressure of the mud input port, use the rotating seat to drive the mold barrel to rotate, and drive the mold core to move upward, so that the mold core is separated from the blank and moves to the top of the mold barrel; stop the rotating seat from rotating, and adjust the mold barrel to a separated state. At this time, the formed blank is only supported by the bottom of the barrel, so the blank can be smoothly taken out, and the molding process of the ceramic crucible blank is completed.

[0015] Compared with the prior art, the molding die of the ceramic crucible has the following beneficial technical effects:

[0016] The molding mold of the ceramic crucible adopts plastic clay with low moisture content as the material for making the blank. The blank after molding has good curing effect and high stability. It can be demolded directly after molding, which greatly improves the molding process efficiency. In the molding mold of the ceramic crucible, the mold core is not only a part of the mold structure, but also integrates the filler function, which realizes the continuous filling and molding, improves the overall processing efficiency, and can reduce the energy consumption cost of equipment operation and the equipment investment cost. During the working process of the molding mold of the ceramic crucible, the mold barrel and the mold core rotate relative to each other, which improves the uniformity and sufficiency of the filler. The blank is subjected to uniform and high-intensity pressure during the molding process, thereby improving the dimensional accuracy, density and structural uniformity of the blank, and realizing high-quality molding processing of the blank. The structural design of the molding mold of the ceramic crucible is ingenious and reasonable. The blank can be automatically demolded after molding, and can effectively reduce the physical damage that may be caused to the blank during the demolding process. In summary, the molding mold of the ceramic crucible can significantly improve the processing efficiency of green body molding and reduce production costs. The green body after molding has low water content, high dimensional accuracy, uniform density and good density, which significantly improves the product quality of the ceramic crucible and is suitable for the processing and production of cylindrical ceramic crucibles of various sizes. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings of the embodiments will be briefly introduced below. Obviously, the drawings in the following description only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0018] Figure 1 It is a schematic diagram of the overall structure of the molding mold of the ceramic crucible.

[0019] Figure 2 Schematic diagram of the structure of the outer mold component.

[0020] Figure 3 This is a schematic diagram of the structure after the outer mold component is partially cut open.

[0021] Figure 4 It is a schematic diagram of the structure of the mold cylinder in the separated state.

[0022] Figure 5 It is a schematic diagram of the structure of the inner mold assembly when the mold core is in the initial state.

[0023] Figure 6 It is a schematic diagram of the structure of the inner mold assembly when the mold core is in a filling state.

[0024] Figure 7 This is a schematic diagram of the structure after the inner mold component is partially cut open.

[0025] Figure 8 It is a schematic diagram of the structure of the molding mold of the ceramic crucible in the mold closing state.

[0026] Fig. 9 Schematic diagram of the matching state of the mold cylinder and the mold core when filling.

[0027] Fig.10 It is a schematic diagram of the coordination between the mold cylinder and the mold core during blank forming.

[0028] Fig.11 It is a schematic diagram of the structure of the molding mold of the ceramic crucible in the demoulding state.

[0029] Fig.12 Schematic diagram of the coordination between the plugging pin, sleeve and core column.

[0030] Fig.13 This is a schematic diagram of the state when the bottom hole is blocked by the blocking pin.

[0031] In the figure: 1. first linear drive device, 2. rotating seat, 3. mold cylinder, 301. cylinder bottom, 302. semi-cylindrical wall, 303. annular step, 4. mold core, 401. mud material input port, 402. sleeve, 403. core column, 404. bottom hole, 405. side hole, 406. blocking pin, 5. third linear drive device, 6. sliding seat, 7. linear guide rail, 8. second linear drive device, 9. machine body, 10. first rotary drive device, 11. support arm, 12. connecting rod, 13. rotary joint, 14. sliding rod, 15. main shaft, 16. blank. DETAILED DESCRIPTION

[0032] In order to make the purpose, technical solution and advantages of the embodiment of the present invention clearer, the technical solution of the embodiment of the present invention will be clearly and completely described below in conjunction with the drawings of the embodiment of the present invention. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] Unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0034] This embodiment discloses a specific implementation structure of a molding die for a ceramic crucible. The molding die includes a body and an outer mold component and an inner mold component mounted on the body.

[0035] See also Figure 1-Figure 4 As shown, the outer mold assembly includes a rotating seat 2 and a mold barrel 3; the rotating seat 2 is rotatably fixed on the machine body 9, and is driven by a rotating drive device to rotate horizontally; the mold barrel 3 is supported by the rotating seat 2, and can rotate horizontally with the rotating seat 2, and the central axis of the mold barrel 3 coincides with the rotation axis during its rotational movement; the mold barrel 3 is cylindrical in the initial state, hollow inside, and a circle of annular steps 303 is provided on the inner diameter side of the upper end of the mold barrel 3; the mold barrel 3 is composed of a barrel bottom 301 and two symmetrical semi-cylindrical walls 302, the barrel bottom 301 is fixedly connected to the rotating seat 2, and the two semi-cylindrical walls 302 are movably connected to the rotating seat 2, and the two semi-cylindrical walls 302 can be adjusted to the two sides of the barrel bottom 301, thereby making the mold barrel 3 reach a separated state from the initial state.

[0036] See also Figure 1 , Figure 5-Figure 8As shown, the inner mold assembly includes a sliding seat 6 and a mold core 4; the sliding seat 6 is slidably fixed on the machine body 9, and is driven by a linear drive device to move up and down to adjust the vertical position; the mold core 4 is supported by the sliding seat 6, and can move up and down with the sliding seat 6, so that the mold core 4 can adjust its position within a vertical stroke; the mold core 4 is cylindrical in the initial state, and the central axis of the mold core 4 always coincides with the central axis of the mold barrel 3; the mold core 4 extends into the mold barrel 3 at the lower end of its stroke, at this time, a sandwich with a U-shaped cross-section is formed between the mold core 4 and the mold barrel 3, and the sandwich is the mold cavity, and the mold core 4 is located above the mold barrel 3 at the upper end of the stroke; the mold The core 4 is composed of a core column 403 and a sleeve 402 arranged outside the core column 403; the core column 403 is fixedly connected to the sliding seat 6, the upper part of the core column 403 is connected to the mud material input port 401, and the side of the core column 403 is evenly distributed with a plurality of side holes 405, and the lower end of the core column 403 is provided with a bottom hole 404, and the inside of the core column 403 is provided with a flow channel connecting the mud material input port 401 with the side holes 405 and the bottom hole 404; the sleeve 402 can slide up and down along the core column 403, and the mold core 4 is in the initial state, and the side hole 405 is blocked by the sleeve 402, and the upward movement of the sleeve 402 can connect the side hole 405 with the mold cavity, and the mold core 4 is switched to the filling state.

[0037] The molding die of the ceramic crucible uses clay with low water content as the body making material. According to the different raw materials and processing techniques, the water content is controlled at 15%-25% to ensure that the clay has good plasticity and weak rheology. The clay input port is connected to a pressure vessel containing the clay. The clay can flow in the molding die only under the high pressure drive provided by the pressure vessel.

[0038] When using the molding mold of the ceramic crucible to make a green body, the following steps can be adopted:

[0039] Step 1: mold closing; Figure 8 As shown, the mold barrel 3 and the mold core 4 are adjusted to the initial state, and the mold core 4 is driven to move to the lower end of the stroke. At this time, the mold core 4 enters the mold barrel 3 to form a mold cavity;

[0040] Step 2: Filling; Fig. 9As shown, the sleeve 402 is driven to move upward, the mold core is switched to the filling state, and the pressure vessel is used to input the mud into the mud input port. The mud enters the mold cavity through the side hole 405 and the bottom hole under the driving of pressure. Since the contact parts between the bottom 301 of the cylinder and the two semi-cylindrical walls 302 and between the mold core and the mold barrel are not completely sealed, the air in the mold cavity can be discharged through the gap as the mud enters, and finally the mold cavity is filled with mud. During the filling process, the mold barrel is driven to rotate at a high speed by the rotating seat, so that the side hole 405 can discharge the mud more evenly to different positions in the mold cavity, ensuring that the mud is evenly distributed. At the same time, the mud moves under the action of centrifugal force, so that the filling is more sufficient and is conducive to the separation and discharge of air in the mold cavity.

[0041] Step 3: Forming; Fig.10 As shown, the sleeve 402 is driven to move downward, so that the mold core is switched to the initial state. During the downward movement of the sleeve 402, the mold cavity space is reduced, which can further increase the clay pressure in the mold cavity, drive the mixed air and excess water in the clay to be discharged, and help to improve the surface accuracy of the outer side of the blank 16; the mold cylinder is driven to rotate at a high speed by the rotating seat, and the mold core and the blank rotate relatively at this time, and the inner side wall of the blank 16 is shaped by the smooth sleeve 402;

[0042] Step 4: demoulding; eliminate the input pressure of the mud input port, use the rotating seat to drive the mold barrel to rotate, and drive the mold core to move upward, so that the mold core and the blank are separated and moved to the top of the mold barrel; in this process, the blank can significantly reduce the force exerted on the mold core due to the centrifugal effect, and even a gap will be generated between the two, making it easier to separate the mold core from the blank, reducing the damage to the blank caused by the mold core during demoulding; then, Fig.11 As shown, the rotating seat stops rotating and the mold cylinder 3 is adjusted to a separated state. At this time, the two semi-cylindrical walls 302 are separated from the blank 16 and move to both sides of the cylinder bottom 301. The formed blank 16 is only supported by the cylinder bottom 301, and the two semi-cylindrical walls 302 and the mold core 4 are far away from the blank 16, which will not hinder the removal of the blank 16. Therefore, the blank 16 can be smoothly taken out, and the forming process of the ceramic crucible blank is completed.

[0043] When demoulding, the core is in the initial state, such as Figure 6 As shown, at this time, the side hole 405 is blocked by the sleeve 402, and the clay cannot leak out through the side hole 405, but the bottom hole 404 is always connected to the outside. Therefore, when demolding, it is necessary to first eliminate the input pressure of the clay input port so that the clay in the core column 403 is not driven by high pressure and will not leak out through the bottom hole 404.

[0044] Further, if Figure 6As shown, the bottom hole 404 is located at a position deviating from the center of the lower end of the core column 403, that is, the bottom hole 404 is eccentrically arranged, thereby ensuring that during the filling and molding process, as the mold cylinder rotates, the lower end of the mold core 4 can have a better physical effect on the mud discharged from the bottom hole 404, so that the bottom of the blank is smoother and the density is more uniform.

[0045] The molding mold of the ceramic crucible adopts plastic clay with low moisture content as the material for making the green body, which significantly improves the curing efficiency and stability of green body molding, ensures that the green body can stably maintain a predetermined shape under a low moisture state, thereby realizing direct and efficient demoulding operation after molding, greatly improving the overall production efficiency.

[0046] In the structure adopted by the molding mold of the ceramic crucible, the mold core not only serves as a part of the mold structure, but also integrates the filling function. With the exquisite coordination of the mold core and the mold barrel, the continuous filling and molding are realized, which simplifies the production process and improves the overall processing efficiency. At the same time, since the idle stroke of the inner mold component is saved, the need for additional filling equipment is eliminated, thereby reducing the energy consumption cost of equipment operation and the equipment investment cost.

[0047] When the forming mold of the ceramic crucible is used for green body forming processing, during the filling process, the mold barrel and the mold core rotate relative to each other, which significantly enhances the uniformity and sufficiency of the filling. In the subsequent forming process, the clay material is evenly compacted and gradually formed as the mold barrel rotates at high speed under a high-pressure environment. This forming feature ensures that the green body is subjected to uniform and high-intensity pressure, thereby improving the dimensional accuracy, density and structural uniformity of the green body, and realizing high-quality forming processing of the green body.

[0048] The structural design of the molding mold of the ceramic crucible is ingenious and reasonable. The mold core can move up and down relative to the mold barrel. The mold barrel is composed of a barrel bottom and two semi-cylindrical walls, so that the molding mold can automatically complete demoulding and effectively reduce the physical damage that may be caused to the blank during the demoulding process; at the same time, the assembly structure design of the mold barrel also promotes the smooth discharge of air and excess moisture in the mold cavity during the filler and molding stages, further optimizing the molding quality of the blank.

[0049] So far, the core structure and functional implementation path of the technical solution of the present invention have been clearly and completely explained. It is implemented in combination with the existing technical achievements in this technical field without any technical obstacles or barriers. In the specific implementation process, there are diversified implementation structure schemes under the framework of the above technical solution, which can effectively achieve the predetermined technical performance goals. At the level of diversified implementation strategies of technical features, they are listed as follows:

[0050] The core function of the rotary drive device is to drive the rotating seat to rotate. There is a certain flexibility in the selection of the power source. Human power can be used as the primary power form. The specific implementation means include a hand-crank mechanism and a foot-operated mechanism. Both methods rely on manual operation to achieve rotary drive. However, in order to pursue a higher level of automation and efficiency, it is more preferable to use a motor as the power source to drive the rotating seat and regulate the rotation state of the rotating seat through the motor.

[0051] As for the movable connection method adopted by the semi-cylindrical wall and the rotating seat, the mechanism is intended to realize the position adjustment of the semi-cylindrical wall. To achieve this goal, the movable connection method can adopt two structural forms: sliding fit or rotating fit; when sliding fit is adopted, the two semi-cylindrical walls are allowed to slide linearly along the preset trajectory to adjust the position; when rotating fit is adopted, the position adjustment is achieved through rotational movement; in addition, in order to improve the convenience and efficiency of the state switching of the mold barrel, a driving device can be set to realize the automatic adjustment of the semi-cylindrical wall position, thereby realizing the rapid and automatic switching of the working state of the mold barrel;

[0052] The purpose of the linear drive device is to drive the sliding seat to make precise position adjustments in the vertical direction. The implementation method can rely on the existing mature linear transmission technology system, such as screw transmission mechanism, gear rack transmission mechanism, etc.; in terms of the choice of power source, both human power and motor are supported. However, in view of the comprehensive consideration of the compactness, efficiency and precision of the mold structure, the linear drive device is more preferably a linear motion power output device such as a cylinder, oil cylinder or linear motor. These devices can directly output linear motion force, effectively optimize the overall layout of the mold and improve system performance;

[0053] As for the adjustment mechanism of the sleeve position, the sleeve can slide up and down along the core column to switch the working state of the mold core. The adjustment mechanism is similar to the adjustment principle of the sliding seat, and can also be implemented in manual adjustment and automatic adjustment modes.

[0054] In addition, in order to make the technical solution of the present invention easier to implement and ensure better working performance after implementation, in this embodiment, examples are given of specific structures preferably adopted for some technical features; optionally, the molding die of the ceramic crucible in the present invention may also have one or more of the following technical features according to actual needs:

[0055] like Figure 2-Figure 4As shown, the rotating seat 2 is fixedly connected to a main shaft 15 extending downward, and the main shaft 15 is transmission-connected to the first rotating drive device 10. A vertical central cavity is provided in the main shaft 15, and a sliding rod 14 passing through and rotatingly cooperating with the main shaft 15 is provided in the central cavity, and the sliding rod 14 can move vertically in the central cavity; each semi-cylindrical wall 302 is fixedly connected to a support arm 11 extending downwardly to its outer side, and the lower ends of the two support arms 11 are rotationally fixed to the opposite sides of the rotating seat 2, so that the two semi-cylindrical walls 302 can swing in the same vertical plane; the two support arms 11 are transmission-connected to the upper end of the sliding rod 14 via a connecting rod 12; the lower end of the sliding rod 14 is transmission-connected to the first linear drive device 1 via a rotating joint 13, so that the sliding rod 14 can adjust its position in the vertical direction; when the sliding rod 14 moves downward, the two semi-cylindrical walls 302 gradually come together and finally assemble with the cylinder bottom 301 to form an initial shape When the slide bar 14 moves upward, the two semi-cylindrical walls 302 move to the two sides of the cylinder bottom 301 respectively, that is, the mold cylinder 3 is in a separated state; based on this design feature, the first rotary drive device 10 can drive the rotating seat 2 to rotate, and the first linear drive device 1 can adjust the position of the two semi-cylindrical walls 302, so that the operation of the molding mold is more automatic and efficient, and the matching mode of the slide bar 14 and the main shaft 15 ensures that the transmission work of the two will not interfere with and hinder, and at the same time improves the compactness of the equipment; in addition, the above-mentioned specific matching structure adopted by the two semi-cylindrical walls 302, the two support arms 11, the two connecting rods 12 and the slide bar 14 enables the mold cylinder 3 to be in the initial state. The force on the two semi-cylindrical walls 302 can not only cause the two to abut closely, but also cause the two semi-cylindrical walls 302 to abut closely with the cylinder bottom 301, thereby improving the structural stability and precision of the mold cylinder 3 in the initial state;

[0056] like Figure 1 , Figure 5 As shown, the sliding seat 6 is slidably fixed on a linear guide rail 7, and the linear guide rail 7 is vertically fixed on a machine body 9, and a second linear drive device 8 drivingly connected to the sliding seat 6 is fixed on the machine body 9;

[0057] The bottom of the cylinder and the semi-cylinder wall are both made of microporous breathable materials. The microporous breathable materials can be breathable steel, porous ceramics, porous metals and other materials in the prior art. These materials usually have the characteristics of air permeability and water absorption. During the molding process of the blank, the air in the mold cavity and the excess water in the mud can be better discharged, thereby improving the molding quality of the blank. In particular, in the present invention, the blank rotates at high speed with the mold barrel during the molding process, which is more conducive to the separation of water and air from the mud. With the above technical characteristics, the solidification efficiency of the blank can be significantly improved, and a unique technical effect can be achieved.

[0058] like Figure 5-Figure 7As shown, a third linear drive device 5 is fixed on the sliding seat 6, and the third linear drive device 5 is transmission-connected with the sleeve 402 to adjust the vertical position of the sleeve 402;

[0059] like Fig.12 , Fig.13 As shown, a vertically extending blocking pin 406 is provided in the core column 403, and the blocking pin 406 extends from the upper end of the core column 403 and the two are slidably sealed and matched, and the upper end of the blocking pin 406 is fixedly connected to the upper end of the sleeve 402 and can move up and down synchronously; when the mold core 4 is in the initial state, the lower end of the blocking pin 406 blocks the bottom hole 404; thus, when the mold core 4 is in the initial state, the sleeve 402 blocks the side hole 405 on the side of the core column 403, and the blocking pin 406 blocks the bottom hole 404 at the lower end of the core column 403, thereby better ensuring that the mud will not leak out from the core column 403 when the mold is not closed.

[0060] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

[0061] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in the field without making any creative work shall fall within the scope of protection of the present invention.

Claims

1. A molding die for a ceramic crucible, comprising an outer mold component and an inner mold component, characterized in that: The outer mold assembly includes a mold barrel that is cylindrical in an initial state, the mold barrel is supported by a rotating seat and can rotate horizontally, and an annular step is provided on the inner diameter side of the upper end of the mold barrel; the mold barrel is composed of a barrel bottom and two semi-cylindrical walls with symmetrical structures, the barrel bottom is fixedly connected to the rotating seat, the two semi-cylindrical walls are movably connected to the rotating seat, and the two semi-cylindrical walls can be adjusted to both sides of the barrel bottom, so that the mold barrel reaches a separated state from the initial state; The inner mold assembly includes a mold core that is cylindrical in the initial state, and the mold core is supported by a sliding seat and can adjust its position within a vertical stroke; when the mold core is at the lower end of the stroke, it extends into the mold barrel to form a mold cavity, and when the mold core is at the upper end of the stroke, it is located above the mold barrel; the mold core is composed of a core column and a sleeve sleeved outside the core column; the core column is fixedly connected to the sliding seat, the upper part of the core column is connected to a mud material input port, a plurality of side holes are evenly distributed on the side, a bottom hole is opened at the lower end, and a flow channel is provided inside the core column to connect the mud material input port with the side holes and the bottom hole; the sleeve The tube can slide up and down along the core column. In the initial state of the mold core, the side hole is blocked by the sleeve. The upward movement of the sleeve can connect the side hole with the mold cavity, and the mold core is switched to the filling state; the central axis and the rotation axis of the mold cylinder coincide with the central axis of the mold core; the bottom hole is located at a position off-center at the lower end of the core column; a vertically extending blocking pin is provided in the core column, the blocking pin extends from the upper end of the core column and the two are slidably sealed, and the upper end of the blocking pin is fixedly connected to the upper end of the sleeve; when the mold core is in the initial state, the lower end of the blocking pin blocks the bottom hole.

2. The molding die for a ceramic crucible according to claim 1, characterized in that: The rotating seat is rotatably fixed on the machine body and driven by a rotating driving device so as to be able to rotate horizontally.

3. The molding die for a ceramic crucible according to claim 1, characterized in that: The sliding seat is slidably fixed on the machine body and can be driven by a linear driving device to move up and down.

4. The molding die for a ceramic crucible according to claim 3, characterized in that: The linear drive device is a pneumatic cylinder, an oil cylinder or a linear motor.

5. The molding die for a ceramic crucible according to claim 1, characterized in that: The rotating seat is fixedly connected to a main shaft extending downward, and the main shaft is transmission-connected to the first rotating drive device. A vertical central cavity is opened in the main shaft, and a sliding rod passing through the central cavity and rotatingly cooperating with the sliding rod is provided in the central cavity, and the sliding rod can move vertically in the central cavity; each semi-cylindrical wall is fixedly connected to a support arm extending downward to its outer side, and the lower ends of the two support arms are rotationally fixed to the opposite sides of the rotating seat, and the two support arms are transmission-connected to the upper end of the sliding rod via a connecting rod; the lower end of the sliding rod is transmission-connected to the first linear drive device via a rotating joint.

6. The forming mold for a ceramic crucible according to claim 1, characterized in that: The sliding seat is slidably fixed on a linear guide rail, the linear guide rail is vertically fixed on the machine body, and a second linear drive device transmission-connected with the sliding seat is fixed on the machine body.

7. The forming mold for a ceramic crucible according to claim 1, characterized in that: The cylinder bottom and the semi-cylinder wall are both made of microporous air-permeable material.

8. The forming mold for a ceramic crucible according to claim 1, characterized in that: A third linear drive device is fixed on the sliding seat, and the third linear drive device is transmission-connected with the sleeve.

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