A mixing apparatus for processing silicon carbide ceramics

Abstract

This invention discloses a mixing device for silicon carbide ceramic processing, belonging to the technical field of ceramic material processing equipment. It includes a base, a top support platform, a tilting mechanism, and a stirring mechanism. The invention uses a drive motor output to drive a lifting slip ring via a material-feeding crank, causing the stirring ribs to contact the inner surface of the receiving tank and undergo elastic deformation. This achieves rapid and thorough mixing of the silicon carbide material and binder, preventing localized cracking during subsequent silicon carbide ceramic firing. The drive motor output shaft also drives driven wheels on both sides to rotate via a drive wheel, thereby causing the temperature control unit on the baffle plate to dynamically provide constant temperature conditions to the mixing area. During the rotation, mixing aids adhering to the surface of the temperature control unit are deposited, ensuring a continuous supply of constant temperature conditions. This prevents the surface temperature of the silicon carbide material from being rapidly absorbed by the mixing aids, ensuring the bonding strength between silicon carbide particles.

Description

Technical Field

[0001] This invention relates to the field of ceramic material processing equipment technology, and specifically to a mixing device for processing silicon carbide ceramics. Background Technology

[0002] Silicon carbide porous ceramics are widely used in wafer manufacturing, photolithography, laser processing and other equipment due to their low density, low thermal expansion coefficient, high thermal conductivity, high elastic modulus and excellent chemical resistance. In the preparation of green blanks, the existing technology usually uses conventional stirring equipment to mix silicon carbide coated with silica sol with pore-forming agent, sintering aid and binder, and finally presses it into shape to prepare silicon carbide ceramic green blanks.

[0003] However, after long-term use, the existing technology has been found to have certain drawbacks, such as: First, due to the poor fluidity of the binder, after the additives are mixed with the silicon carbide coated with silica sol, the silicon carbide coated with silica sol tends to clump together and cannot be quickly and fully mixed with the binder. Insufficient mixing can lead to local cracking during the subsequent firing process of silicon carbide ceramics. Second, after the silicon carbide coated with silica sol is mixed with the pore-forming agent and sintering aid, its surface temperature is rapidly absorbed, causing the surface silica sol that first comes into contact with the pore-forming agent and sintering aid to partially detach from the silicon carbide, resulting in a weakening of the bonding strength between silicon carbide particles. Summary of the Invention

[0004] The purpose of this invention is to provide a mixing device for silicon carbide ceramic processing to solve the above-mentioned defects caused by the prior art.

[0005] A mixing device for silicon carbide ceramic processing includes a base, a top support platform, a tilting mechanism, and a stirring mechanism. The top support platform is installed on the upper end of the base. The tilting mechanism is installed on the base and is used to hold silicon carbide raw materials coated with silica sol and additives to be mixed, as well as to unload the materials after mixing. The stirring mechanism is installed on the tilting mechanism and is used to keep the silicon carbide raw materials coated with silica sol and the additives to be mixed warm and stir them evenly.

[0006] Preferably, the flipping mechanism includes a cylinder, a container tank, and a liquid supply pump. The cylinder is mounted on a base via a mounting bracket, and a connecting block is movably mounted on the output end of the cylinder. The container tank is fixedly disposed at the other end of the connecting block. A connecting plate is symmetrically hinged to the container tank below the connecting block. The other end of the connecting plate is fixedly connected to the mounting bracket. A pre-stored depth groove is formed on the inner surface of the container tank. Liquid injection grooves are provided on both sides of the top of the container tank. The liquid supply pump is configured to inject the additive to be mixed into the container tank through the liquid injection grooves.

[0007] Preferably, the stirring mechanism includes a drive motor, a temperature control unit, and stirring ribs. The drive motor is installed on the side of the container, and a drive wheel is installed at the output end of the drive motor. A driven wheel that meshes with the drive wheel is also installed on the container. A baffle plate is provided inside the container. The temperature control unit passes through the baffle plate and is coaxially connected to the driven wheel. A material-pushing crank is installed at the output end of the drive motor through the baffle plate. A lifting slip ring is slidably provided at the other end of the material-pushing crank. The lifting slip ring is slidably provided on both sides of the container. A symmetrically arranged spring is sleeved on the lower part of the lifting slip ring. A mounting seat is slidably provided on the lifting slip ring at the lower end of the spring. The stirring ribs are adjustablely provided on the mounting seats, and an extension column is provided inside the stirring ribs.

[0008] Preferably, the side end of the feed crank is engaged with the temperature control unit.

[0009] Preferably, the length of the extension column is less than the length of the mixing reinforcement strip.

[0010] The advantages of this invention are:

[0011] By setting a flipping mechanism and a stirring mechanism on the base, the output end of the cylinder drives the container to flip upward, so that the semi-enclosed cavity area formed by the pre-stored deep groove and the stop plate can be mixed and stirred. Then, the output end of the drive motor drives the lifting slip ring to reciprocate up and down through the material feeding crank. The stirring ribs abut against the inner surface of the container and undergo elastic deformation. The lower tip will break through the clump of silicon carbide raw material. The deformation process will quickly squeeze and push the mixing aid, so that the binder with poor flowability in the mixing aid forms multiple instantaneous holes. The broken and dispersed silicon carbide raw material is quickly filled into the holes, thereby realizing the rapid and thorough mixing of silicon carbide material and binder, avoiding local cracking in the subsequent silicon carbide ceramic firing process.

[0012] The output shaft of the drive motor also drives the driven wheels on both sides to rotate via the drive wheel, thereby driving the temperature control unit on the baffle plate to dynamically provide constant temperature conditions to the mixing and stirring area. During the rotation process, the mixing additives attached to the surface of the temperature control unit will be hung out to ensure the continuous supply of constant temperature conditions, thereby preventing the surface temperature of silicon carbide material from being rapidly absorbed by the mixing additives and ensuring the bonding strength between silicon carbide particles. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of the present invention.

[0014] Figure 2 This is a schematic diagram of the flipping mechanism in this invention.

[0015] Figure 3 This is a schematic diagram of the stirring mechanism in this invention.

[0016] Figure 4 This is a schematic diagram of the assembly of the stirrup and the extension column in this invention.

[0017] Figure 5 This is a bottom view of the stirrups and extension columns in this invention.

[0018] Among them, 1-base, 2-top support platform, 3-tilting mechanism, 4-stirring mechanism, 301-cylinder, 302-supporting tank, 303-liquid supply pump, 304-mounting bracket, 305-connecting block, 306-connecting plate, 307-pre-stored deep tank, 308-liquid injection tank, 401-drive motor, 402-temperature control unit, 403-stirring ribs, 404-drive wheel, 405-driven wheel, 406-stop plate, 407-material feeding crank, 408-lifting slip ring, 409-spring, 410-mounting seat, 411-extension column. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] like Figures 1 to 5 As shown, a mixing device for silicon carbide ceramic processing includes a base 1, a top support platform 2, a tilting mechanism 3, and a stirring mechanism 4. The top support platform 2 is installed on the upper end of the base 1. The tilting mechanism 3 is installed on the base 1 and is used to hold silicon carbide raw materials coated with silica sol and additives to be mixed, as well as to unload the materials after mixing. The stirring mechanism 4 is installed on the tilting mechanism 3 and is used to keep the silicon carbide raw materials coated with silica sol and additives to be mixed warm and stir them evenly.

[0021] In this embodiment, the flipping mechanism 3 includes a cylinder 301, a container 302, and a liquid supply pump 303. The cylinder 301 is mounted on the base 1 via a mounting bracket 304. A connecting block 305 is movably mounted on the output end of the cylinder 301. The container 302 is fixedly disposed at the other end of the connecting block 305. A connecting plate 306 is symmetrically hinged to the container 302 below the connecting block 305. The other end of the connecting plate 306 is fixedly connected to the mounting bracket 304. A pre-stored depth groove 307 is opened on the inner surface of the container 302. Liquid injection grooves 308 are provided on both sides of the top of the container 302. The liquid supply pump 303 injects the additive to be mixed into the container 302 through the liquid injection grooves 308.

[0022] In this embodiment, the stirring mechanism 4 includes a drive motor 401, a temperature control unit 402, and stirring ribs 403. The drive motor 401 is installed on the side of the receiving tank 302. A drive wheel 404 is installed at the output end of the drive motor 401. A driven wheel 405 meshing with the drive wheel 404 is also installed on the receiving tank 302. A flow stop plate 406 is provided inside the receiving tank 302. The temperature control unit 402 passes through the flow stop plate 406 and is coaxially connected to the driven wheel 405. The output end of 1 is connected to the flow stop plate 406 and a material-pulling crank 407 is installed. The other end of the material-pulling crank 407 is slidably provided with a lifting slip ring 408. The lifting slip ring 408 is slidably provided on both sides of the receiving groove 302. The lower part of the lifting slip ring 408 is also fitted with symmetrically arranged springs 409. The lifting slip ring 408 is slidably provided with a mounting base 410 at the lower end of the springs 409. The stirring rib 403 is adjustablely provided on the mounting base 410. An extension column 411 is provided inside the stirring rib 403.

[0023] It should be noted that the top support platform 2 cooperates with the receiving trough 302, the insert stirring rib 403 is an elastic composite material, which can undergo elastic deformation under certain strength conditions, and the material pushing crank 407 cooperates with the inner surface of the pre-stored deep groove 307, and there is no rigid contact between the two.

[0024] In this embodiment, the side end of the feed crank 407 is engaged with the temperature control unit 402.

[0025] Furthermore, the length of the extension column 411 is less than the length of the reinforcing bar 403.

[0026] Working process and principle: In the process of using this invention, firstly, the cylinder 301 is started to reset its output end. Then, the connecting block 305 and the connecting plate 306 drive the receiving tank 302 to flip upward until the output end of the cylinder 301 is completely reset. At this time, silicon carbide raw material coated with silica sol is filled into the pre-stored deep groove 307 in the receiving tank 302, and the liquid supply pump 303 is turned on to inject the additive to be mixed into the semi-closed cavity area formed by the pre-stored deep groove 307 and the stop plate 406 through the liquid injection tank 308.

[0027] Then, the drive motor 401 is started so that its output end drives the feeding crank 407 to rotate, which moves the silicon carbide raw material and mixing aid placed in the pre-stored deep groove 307 to achieve rapid premixing. Under the drive of the feeding crank 407, the lifting slip ring 408 will reciprocate. The inserting stirring rib 403 on the mounting base 410 abuts against the inner surface of the receiving tank 302 and undergoes elastic deformation. Its lower tip will break through the clump of silicon carbide raw material. The deformation process will quickly squeeze and push the mixing aid, so that the binder with poor flowability in the mixing aid forms multiple instantaneous holes, and the broken and dispersed silicon carbide raw material quickly fills the holes.

[0028] Meanwhile, the output shaft of the drive motor 401 will also drive the driven wheels 405 on both sides to rotate via the drive wheel 404, thereby driving the temperature control unit 402 on the baffle plate 406 to dynamically provide constant temperature conditions to the mixing and stirring area. During the rotation of 407, the mixing aids attached to the surface of the temperature control unit 402 will be hung out to ensure the continuous supply of constant temperature conditions. After the mixing operation is completed, the cylinder 301 is started again to drive the container 302 to reverse and flip until it is placed against the top support platform 2, so that the prepared material that has been mixed in the pre-stored deep tank 307 can be automatically discharged.

[0029] Based on the above, the present invention sets a flipping mechanism 3 and a stirring mechanism 4 on the base 1. The output end of the cylinder 301 drives the container 302 to flip upward, so that the semi-closed cavity area formed by the pre-stored deep groove 307 and the stop plate 406 can be mixed and stirred. Then, the output end of the drive motor 401 drives the lifting slip ring 408 to reciprocate and lift through the material crank 407. The stirring rib 403 abuts against the inner surface of the container 302 and undergoes elastic deformation. Its lower tip will break through the clump of silicon carbide raw material. The deformation process will quickly squeeze and push the mixing aid, so that the binder with poor flowability in the mixing aid forms multiple instantaneous holes. The broken and dispersed silicon carbide raw material is quickly filled into the holes, thereby realizing the rapid and sufficient mixing of silicon carbide material and binder, avoiding local cracking in the subsequent silicon carbide ceramic firing process.

[0030] The output shaft of the drive motor 401 also drives the driven wheels 405 on both sides to rotate via the drive wheel 404, thereby driving the temperature control unit 402 on the baffle plate 406 to dynamically provide constant temperature conditions to the mixing and stirring area. During the rotation of 407, the mixing additives attached to the surface of the temperature control unit 402 will be hung out to ensure the continuous supply of constant temperature conditions, thereby preventing the surface temperature of the silicon carbide material from being rapidly absorbed by the mixing additives and ensuring the bonding strength between silicon carbide particles.

[0031] As is known from common technical knowledge, this invention can be implemented through other embodiments that do not depart from its spirit or essential characteristics. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not the only ones. All modifications within the scope of this invention or equivalent to the scope of this invention are included in this invention.

Claims

1. A mixing device for processing silicon carbide ceramics, characterized in that, It includes a base (1), a top support platform (2), a tilting mechanism (3), and a stirring mechanism (4). The top support platform (2) is installed on the upper end of the base (1). The tilting mechanism (3) is installed on the base (1) and is used to hold silicon carbide raw materials coated with silica sol and additives to be mixed, as well as to unload the material after mixing. The stirring mechanism (4) is installed on the tilting mechanism (3) and is used to keep the silicon carbide raw materials coated with silica sol and additives to be mixed warm and stir them evenly. The stirring mechanism (4) includes a drive motor (401), a temperature control unit (402), and stirring ribs (403). The drive motor (401) is installed on the side of the container (302). A drive wheel (404) is installed at the output end of the drive motor (401). A driven wheel (405) meshing with the drive wheel (404) is also installed on the container (302). A baffle plate (406) is provided inside the container (302). The temperature control unit (402) passes through the baffle plate (406) and is coaxially connected with the driven wheel (405). The drive motor (401)... A material-pushing crank (407) is installed through the flow stop plate (406) at the output end. A lifting slip ring (408) is slidably arranged at the other end of the material-pushing crank (407). The lifting slip ring (408) is slidably arranged on both sides of the receiving groove (302). A symmetrically arranged spring (409) is also sleeved on the lower part of the lifting slip ring (408). A mounting seat (410) is slidably arranged on the lifting slip ring (408) at the lower end of the spring (409). The stirring rib (403) is adjustablely arranged on the mounting seat (410). An extension column (411) is arranged inside the stirring rib (403). When the mixing rib (403) comes into contact with the inner surface of the receiving tank (302), it undergoes elastic deformation. Its lower tip will break through the clustered silicon carbide raw material, and the deformation process will quickly squeeze and push the mixing aid.

2. The mixing apparatus for processing silicon carbide ceramics according to claim 1, characterized by: The flipping mechanism (3) includes a cylinder (301), a container (302), and a liquid supply pump (303). The cylinder (301) is mounted on the base (1) via a mounting bracket (304). A connecting block (305) is movably mounted on the output end of the cylinder (301). The container (302) is fixedly mounted on the other end of the connecting block (305). A connecting plate (306) is symmetrically hinged to the container (302) below the connecting block (305). The other end of the connecting plate (306) is fixedly connected to the mounting bracket (304). A pre-stored depth groove (307) is opened on the inner surface of the container (302). Liquid injection grooves (308) are provided on both sides of the top of the container (302). The liquid supply pump (303) injects the additive to be mixed into the container (302) through the liquid injection grooves (308).

3. The apparatus according to claim 1, wherein: The side end of the feed crank (407) is engaged with the temperature control unit (402).

4. The apparatus according to claim 1, wherein: The length of the extension column (411) is less than the length of the reinforcing bar (403).

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