Ceramic forming device

Abstract

The present invention discloses a ceramic forming device, comprising a rotating bearing mechanism rotatably connected to a base, a driving assembly being provided at the lower part of the rotating bearing mechanism, a plurality of notches being provided circumferentially on the rotating bearing mechanism and a downward pressing fixing mechanism being provided corresponding to the notches, one end of the downward pressing fixing mechanism being hinged to the rotating bearing mechanism, and the other end being detachably connected to the rotating bearing mechanism, a negative pressure cover being provided correspondingly below the notch, the edge of the negative pressure cover being in sliding contact with the bottom surface of the rotating bearing mechanism, an air pressure regulating assembly for automatically controlling the switch of the driving assembly being provided on the negative pressure cover, and a suction assembly being connected below the negative pressure cover. The present invention can ensure that the ceramic slurry is fully immersed in the interior of the inorganic non-metallic fiber paper, and can clear the pores between the fibers. The present invention has a simple structure, and can simultaneously realize the automatic switch of the driving assembly and the automatic air intake, pressure boosting and resetting into the negative pressure cover after the porous ceramic blank is suction-formed, without the need for a complex electric control system.

Description

Technical Field

[0001] The invention relates to a ceramic forming device, in particular to a fiber paper-based porous ceramic forming device. Background Art

[0002] Porous ceramic materials are commonly used filter materials in the chemical and food industries. They have a large number of non-closed channels inside, and have good filtering performance and are reusable.

[0003] The preparation process of porous ceramic materials mainly includes: immersing inorganic non-metallic fiber paper in ceramic-based slurry, taking out the slurry after it is evenly immersed in the inorganic non-metallic fiber paper, drying and forming it, and sintering it to obtain porous ceramic materials. This ceramic preparation method uses a criss-cross network structure of inorganic non-metallic fibers to form the main frame of the ceramic material, and the ceramic-based high-temperature strengthening agent connects the frame fibers together to strengthen the frame and prevent deformation and collapse caused by the product's own weight during the firing process. By utilizing the interwoven network characteristics between the inorganic non-metallic fiber paper fibers, porous ceramic materials with different performance requirements can be produced.

[0004] Inorganic non-metallic fibers are soft, have high dry and wet strength at room temperature, are temperature resistant, and have strengths between 2-3MPa. According to this characteristic, the main components of inorganic non-metallic fibers are Al3O2 and SiO2, which are fibrous materials formed by calcining and melting aluminum-containing ores (kaolin or clay, etc.) at a high temperature of more than 1700°C and then spraying. Although its morphology is similar to that of plant fibers, its strength and other technical properties are significantly higher than those of plant fibers.

[0005] The key to the above ceramic forming method is how to control the ceramic slurry to be evenly immersed and coated on the surface of inorganic non-metallic fibers, so as to form a porous ceramic blank with a certain pore size. In order to prevent desizing, the existing ceramic slurry is usually viscous, and there is air between the fibers inside the paper. Simply immersing the paper into the ceramic slurry is difficult to make the slurry evenly penetrate the inside of the thicker paper, which makes it difficult for the fibers inside the paper to be coated with the ceramic slurry. The thick slurry on the surface of the paper will close the pores inside the paper, and finally the sintered ceramic material lacks porous properties, making it difficult to obtain qualified ceramic filter materials. Summary of the invention

[0006] Purpose of the invention: The purpose of the present invention is to provide a ceramic forming device to solve the problem of how to uniformly immerse ceramic slurry into and coat it on the surface of inorganic non-metallic fibers.

[0007] Technical solution: A ceramic forming device described in the present invention includes a rotating bearing mechanism rotatably connected to a base, a driving assembly is provided at the lower part of the rotating bearing mechanism, a plurality of notches are circumferentially provided on the rotating bearing mechanism and a downward pressing fixing mechanism corresponding to the notches, one end of the downward pressing fixing mechanism is hinged to the rotating bearing mechanism, and the other end is detachably connected to the rotating bearing mechanism, a negative pressure cover is correspondingly provided below the notch, the edge of the negative pressure cover is in sliding contact with the bottom surface of the rotating bearing mechanism, an air pressure regulating assembly is provided on the negative pressure cover for automatically controlling the switch of the driving assembly according to the change of air pressure in the negative pressure cover, the air pressure regulating assembly automatically intakes air into the negative pressure cover to increase the pressure after the porous ceramic blank is suction-formed, and a suction assembly is connected under the negative pressure cover.

[0008] Preferably, the rotating bearing mechanism includes a column whose lower end is rotatably connected to the base, a turntable is provided at the upper end of the column, the slot is circumferentially arranged on the turntable, the edge of the negative pressure cover is slidably abutted against the bottom surface of the turntable, and the driving assembly is arranged on the outside of the column.

[0009] Preferably, a suction ring is provided on the edge of the negative pressure cover, and the top surface of the suction ring is in sliding contact with the bottom surface of the rotating disk. The suction ring can provide a buffer distance for the relative displacement between the rotating disk and the negative pressure cover, and prevent air leakage due to inaccurate alignment between the notch and the negative pressure cover.

[0010] Preferably, the air pressure regulating component includes a detection tube whose one end is connected to the negative pressure cover and the other end is closed, a slider is sealed and slidably connected in the detection tube, a first through hole is provided on the slider, a second through hole is provided on the side wall of the detection tube, a connecting tube is provided at one end of the second through hole, the other end of the connecting tube is connected to the negative pressure cover, when the porous ceramic blank is suction-formed, the first through hole is connected to the second through hole, an insert block is provided at one end of the slider, arc blocks are symmetrically provided on the inner wall of the detection tube, the insert blocks are slidably connected between the arc blocks, a balancing chamber is formed between the arc blocks and the sealed end of the detection tube, a switch block is provided at the end of the arc block close to the balancing chamber, the switch block is electrically connected to the driving component through a wire, a conductive block is provided at the end of the insert block close to the balancing chamber, and the driving component is energized and started when the conductive block is inserted between the switch blocks.

[0011] The present invention controls the sliding of the slider back and forth in the detection tube by the pressure difference between the negative pressure cover and the balance chamber, and controls the pressure increase of the air into the negative pressure cover or the switch drive component to control the rotation or reset of the turntable according to the different positions of the slider. The control of the pressure increase of the air into the negative pressure cover is mainly realized by whether the first through hole and the second through hole are connected, the switch drive component is mainly realized by whether the conductive block and the switch block are in contact and connected, and the reset is realized by the pressure in the negative pressure cover and the balance chamber being 0.

[0012] Preferably, the driving assembly comprises a driven wheel arranged on the column and a motor arranged on the base, a driving wheel is arranged on the output shaft of the motor, and the driving wheel and the driven wheel are connected via a belt drive.

[0013] Preferably, the downward pressing and fixing mechanism comprises a connecting rod with one end hinged to the rotating disk, and the other end of the connecting rod is provided with a pressing ring, the pressing ring is arranged corresponding to the notch, and the outer end of the pressing ring is detachably connected to the rotating disk.

[0014] Preferably, an elastic ring is provided on the bottom surface of the pressing ring, a pressing handle is provided on the outside of the pressing block, and a fixing block is provided on the outer edge of the rotating disk. The fixing block is arranged corresponding to the pressing handle, and is temporarily positioned by sleeved fixing ring when the fixing block and the pressing handle are in contact. The elastic ring can not only avoid damage to the inorganic non-metallic fiber paper during crimping and fixing, but also can effectively crimp and seal the paper dipped in slurry on the notch, so as to facilitate the subsequent negative pressure suction to remove excess slurry and promote uniform internal immersion of slurry.

[0015] Preferably, the suction assembly comprises a slurry outlet pipe whose upper end is connected to the negative pressure cover, a side wall of the slurry outlet pipe is connected to a suction pipe, the suction pipe is connected to a negative pressure suction device, and a lower end of the slurry outlet pipe is connected to a storage box.

[0016] Beneficial effects: Compared with the prior art, the present invention has the following significant advantages:

[0017] (1) The present invention can ensure that the ceramic slurry is fully immersed in the inorganic non-metallic fiber paper, preventing the internal air from hindering the slurry from entering, and can dredge the pores between the fibers, preventing excessive slurry from clogging the fiber pores and causing the ceramic material pores to be closed.

[0018] (2) The present invention can realize the automatic switch driving assembly and the automatic air intake into the negative pressure cover to increase the pressure and reset after the porous ceramic blank is sucked and formed by a simple mechanical structure, without the need for a complex electronic control system. It is simple, practical and low-cost.

[0019] (3) The multiple groups of notches and downward-pressing fixing mechanisms provided on the turntable can realize the synchronous cycle of molding processing and loading and unloading, thereby improving the efficiency of ceramic molding processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0021] Figure 2 A top view of the present invention;

[0022] Figure 3 for Figure 2 Middle AA section view;

[0023] Figure 4 for Figure 2Middle BB section view;

[0024] Figure 5 It is a structural diagram of the slider and other related components inside the detection tube.

[0025] 1-base, 2-turntable, 21-slot, 22-fixed block, 3-column, 31-driven wheel, 4-connecting rod, 41-pressure ring, 42-pressure handle, 43-elastic ring, 5-motor, 51-driving wheel, 52-belt, 6-negative pressure cover, 61-adsorption ring, 7-slurry outlet pipe, 71-storage box, 72-suction pipe, 8-detection tube, 81-connecting pipe, 82-slider, 821-first through hole, 822-second through hole, 823-arc block, 824-insertion block, 825-wire, 826-conductive block, 827-switch block, 828-balance chamber, 9-fixed ring. DETAILED DESCRIPTION

[0026] The technical solution of the present invention is further described below in conjunction with the accompanying drawings.

[0027] like Figure 1-4 As shown, a ceramic forming device comprises a column 3 rotatably connected to a base 1 at the lower end, a turntable 2 is arranged at the upper end of the column 3, a plurality of notches 21 are arranged circumferentially on the turntable 2, a plurality of connecting rods 4 are hinged on the turntable 2, and a pressure ring 41 for sealing and fixing the paper after being dipped in slurry is arranged at the other end of each connecting rod 4, and an elastic ring 43 is arranged on the bottom surface of the pressure ring 41, and the pressure ring 41 and the elastic ring 43 are arranged corresponding to the notch 21, that is, when the pressure ring 41 is fully pressed down, the inner circles of the pressure ring 41 and the elastic ring 43 coincide with the notch 21 or are slightly larger than the notch 21. A pressure handle 42 is arranged on the outer side of the pressure ring 41, and the pressure handle 42 can be detachably connected to the outer edge of the turntable 2, and the detachable connection method includes snap connection, plug connection, threaded connection, latch connection, etc. A negative pressure cover 6 is provided below the notch 21, and an adsorption ring 61 is provided on the edge of the negative pressure cover 6. The top surface of the adsorption ring 61 is in sliding contact with the bottom surface of the turntable 2. A driving assembly for driving the column 3 and the turntable 2 to rotate is provided on the outer side of the middle and lower part of the column 3.

[0028] The negative pressure hood 6 is provided with an air pressure regulating component which automatically controls the switch of the driving component according to the air pressure change in the negative pressure hood 6. The air pressure regulating component automatically intakes air into the negative pressure hood 6 to increase the pressure after the porous ceramic blank is suction-formed. A suction component is connected under the negative pressure hood 6.

[0029] In this embodiment, the driving assembly includes a driven wheel 31 arranged on the column 3 and a motor 5 arranged on the base 1. The output shaft of the motor 5 is provided with a driving wheel 51, and the driving wheel 51 is connected to the driven wheel 31 through a belt 52.

[0030] like Figure 4 and Figure 5 As shown, in this embodiment, the air pressure regulating assembly includes a detection tube 8 which is connected to the negative pressure cover 6 at one end and is closed at the other end. A slider 82 is sealed and slidably connected inside the detection tube 8. A first through hole 821 is provided on the slider 82. A second through hole 822 is provided on the side wall of the detection tube 8. A connecting pipe 81 is provided at one end of the second through hole 822. The other end of the connecting pipe 81 is connected to the negative pressure cover 6. When the porous ceramic blank is sucked and formed, the first through hole 821 is connected to the second through hole 822. An insert is provided at one end of the slider 82. 824, arc blocks 823 are symmetrically arranged on the inner wall of the detection tube 8, the plug block 824 is slidably connected between the arc blocks 823, and a balance cavity 828 is formed between the arc block 823 and the sealed end of the detection tube 8, the arc block 823 is provided with a switch block 827 at one end close to the balance cavity 828, the switch block 827 is electrically connected to the drive assembly through a wire 825, and the plug block 824 is provided with a conductive block 826 at one end close to the balance cavity 828, when the conductive block 826 is inserted between the switch block 827, the motor 5 is powered on and started. When the wire 825 passes through, it cannot destroy the sealing effect of the balance cavity 828, ensuring that the air pressure in the balance cavity 828 is one atmosphere.

[0031] In this embodiment, the number of arc blocks 823 is 2, and may be 4 or more. The conductive block 826 and the switch block 827 are made of metal with excellent conductive properties. The plug block 824, the arc block 823 and the inner wall of the detection tube 8 are all made of insulating materials. In order to ensure that the sliding direction of the slider 82 is always a straight line, a convex strip may be provided on the surface of the slider 82 along the long axis direction, and a guide groove may be provided on the inner wall of the detection tube 8, so that the convex strip is sealed and slidably connected in the guide groove.

[0032] In this embodiment, the inner diameter of the adsorption ring 61 can be the same as the diameter of the notch 21, and the outer diameter can be 1-3 cm larger than the inner diameter. The negative pressure cover 6 is made of a rigid material, such as glass, and the adsorption ring 61 can be a rigid or elastic material with a certain hardness, such as glass or wear-resistant rubber. In order to reduce the friction between the adsorption ring 61 and the turntable 2 and increase the sealing between the adsorption ring 61 and the turntable 2, lubricating grease such as vaseline or mechanical butter can be applied to the adsorption ring 61 and the bottom surface of the turntable 2.

[0033] In this embodiment, the specific way in which the outer end of the pressure ring 41 is detachably connected to the turntable 2 is that a fixing block 22 is provided on the outer edge of the turntable 2, and the fixing block 22 is correspondingly arranged with the pressure handle 42. When the fixing block 22 abuts against the pressure handle 42, they are temporarily positioned by sleeve-mounting a fixing ring 9.

[0034] In this embodiment, the suction assembly includes a slurry outlet pipe 7 whose upper end is connected to the negative pressure cover 6, a side wall of the slurry outlet pipe 7 is connected to a suction pipe 72, the suction pipe 72 is connected to a negative pressure suction device, and the lower end of the slurry outlet pipe 7 is connected to a storage box 71. The negative pressure suction device can be a conventional negative pressure pump or the like.

[0035] Working process and principle:

[0036] First, immerse the inorganic non-metallic fiber paper with a thickness of 1 cm in the ceramic slurry, so that the surface of the inorganic non-metallic fiber paper is evenly coated with a layer of ceramic slurry, flatten the paper coated with ceramic slurry and place it on the notch 21, press down the pressing ring 41 until the pressing handle 42 abuts against the fixing block 22, and then put the fixing ring 9 on the pressing handle 42 and the fixing block 22 to complete the pressing and fixing operation. At this time, the pressing ring 41 flattens the paper and fixes it on the notch 21 through the elastic ring 43 and seals the top of the notch 21. At this time, turn on the negative pressure pump and the motor 5, and the motor 5 drives the column 3 and the turntable 2 to rotate through the belt 52. When the slot 21 is completely rotated to the top of the negative pressure cover 6 and overlaps with the negative pressure cover 6, since the paper coated with ceramic slurry is airtight and the adsorption ring 61 is sealed with the turntable 2, the pressure in the negative pressure cover 6 drops rapidly, and the air pressure in the connecting part between the detection tube 8 and the negative pressure cover 6 also drops rapidly. At this time, the air pressure in the balance chamber 828 is much higher than the air pressure at the other end of the detection tube 8, and the slider 82 is quickly pushed to slide toward the negative pressure cover 6. At this time, the first through hole 821 quickly passes over the second through hole 822 from the initial position on the right side of the second through hole 822 and slides to the left side of the second through hole 822, and the first through hole 821 and the second through hole 822 are not connected. At the same time, the slider 82 drives the plug block 824 and the conductive block 826 to slide toward the negative pressure cover 6. When the conductive block 826 is out of contact with the switch block 827, a circuit is broken, the motor 5 is powered off and stopped, the turntable 2 stops rotating, and the slot 21 stays above the negative pressure cover 6 for the subsequent negative pressure forming process.

[0037] Since no gas enters, the air pressure in the negative pressure cover 6 continues to decrease until the ceramic slurry on the surface of the paper is sucked into the paper and passes through the paper to be sucked out and fall into the negative pressure cover 6. At this time, the fibers in the paper are evenly coated with the ceramic slurry and through pores are formed. The air is also sucked into the negative pressure cover 6 through the paper. The air pressure in the negative pressure cover 6 slowly increases. Since the pressure difference between the negative pressure cover 6 and the balance chamber 828 is reduced, the slider 82 and the first through hole 821 thereon gradually slide toward the balance chamber 828 until the first through hole 821 is connected to the second through hole 822. At this time, the gas enters the connecting pipe 81 through the second through hole 822 and the first through hole 821, and then quickly enters the negative pressure cover 6. At this time, the pressure difference between the negative pressure cover 6 and the balance chamber 828 gradually decreases, and the slider 82 also gradually resets and slides to the balance chamber 828. When the first through hole 821 has not yet been disconnected from the second through hole 822, the conductive block 826 has been connected to the switch block 827, and the motor 5 is powered on to drive the turntable 2 to rotate. At this time, the air pressure in the negative pressure cover 6 is only slightly lower than the external atmospheric pressure, and the pressure between the adsorption ring 61 and the turntable 2 is small, which will not hinder the rotation of the turntable 2. When the notch 21 is misaligned with the negative pressure cover 6, the negative pressure cover 6 is completely connected to the atmosphere, and the air pressure is the same as that of the balance chamber 828. At this time, the slider 82, the plug block 824 and the conductive block 826 are completely reset. When the next notch 21 moves to the top of the negative pressure cover 6 and aligns, the above working process is repeated. The slurry in the negative pressure cover 6 will fall into the storage box 71 through the slurry outlet pipe 7 for collection and reuse. The formed ceramic blank is removed at the next workstation and sintered to prepare a porous ceramic material.

Claims

1. A ceramic forming device, It is characterized in that It comprises a rotating bearing mechanism rotatably connected to a base (1), a driving assembly is provided at the bottom of the rotating bearing mechanism, a plurality of notches (21) and a downward pressing fixing mechanism corresponding to the notches (21) are provided on the rotating bearing mechanism in the circumferential direction, one end of the downward pressing fixing mechanism is hinged to the rotating bearing mechanism, and the other end is detachably connected to the rotating bearing mechanism, a negative pressure cover (6) is provided below the notch (21), the edge of the negative pressure cover (6) is in sliding contact with the bottom surface of the rotating bearing mechanism, an air pressure regulating assembly is provided on the negative pressure cover (6) for automatically controlling the switch of the driving assembly according to the change of air pressure in the negative pressure cover (6), the air pressure regulating assembly automatically takes air into the negative pressure cover (6) to increase the pressure after the porous ceramic blank is suction-formed, and a suction assembly is connected below the negative pressure cover (6); The air pressure regulating assembly comprises a detection tube (8) whose one end is connected to the negative pressure cover (6) and the other end is closed, a slider (82) is sealed and slidably connected inside the detection tube (8), a first through hole (821) is provided on the slider (82), a second through hole (822) is provided on the side wall of the detection tube (8), a connecting pipe (81) is provided at one end of the second through hole (822), the other end of the connecting pipe (81) is connected to the negative pressure cover (6), when the porous ceramic blank is formed by suction, the first through hole (821) is connected to the second through hole (822), an insert block (824) is provided at one end of the slider (82), and the detection tube (82) is connected to the negative pressure cover (6). The inner wall of the measuring tube (8) is symmetrically provided with arc blocks (823), the insert block (824) is slidably connected between the arc blocks (823), a balance cavity (828) is formed between the arc block (823) and the sealed end of the detection tube (8), the arc block (823) is provided with a switch block (827) at one end close to the balance cavity (828), the switch block (827) is electrically connected to the driving component through a wire (825), the insert block (824) is provided with a conductive block (826) at one end close to the balance cavity (828), and the driving component is powered on and started when the conductive block (826) is inserted between the switch blocks (827); The rotating bearing mechanism comprises a column (3) whose lower end is rotatably connected to a base (1); a turntable (2) is provided at the upper end of the column (3); the notch (21) is circumferentially arranged on the turntable (2); the edge of the negative pressure cover (6) is in sliding contact with the bottom surface of the turntable (2); and the driving assembly is arranged on the outer side of the column (3); A suction ring (61) is provided on the edge of the negative pressure cover (6), and the top surface of the suction ring (61) is in sliding contact with the bottom surface of the rotating disk (2); The driving assembly comprises a driven wheel (31) arranged on the column (3) and a motor (5) arranged on the base (1); a driving wheel (51) is arranged on the output shaft of the motor (5); the driving wheel (51) and the driven wheel (31) are connected to each other by a belt (52); and the motor (5) is electrically connected to the switch block (827); The downward pressing and fixing mechanism comprises a connecting rod (4) with one end hinged on the rotating disk (2), the other end of the connecting rod (4) is provided with a pressing ring (41), the pressing ring (41) is arranged corresponding to the notch (21), and the outer end of the pressing ring (41) is detachably connected to the rotating disk (2); The bottom surface of the pressure ring (41) is provided with an elastic ring (43), the outer side of the pressure block is provided with a pressure handle (42), the outer edge of the rotating disk (2) is provided with a fixing block (22), the fixing block (22) and the pressure handle (42) are arranged correspondingly, and when the fixing block (22) and the pressure handle (42) are in contact, they are temporarily positioned by sleeve-arranging a fixing ring (9); The suction assembly comprises a pulp outlet pipe (7) whose upper end is connected to a negative pressure cover (6); a side wall of the pulp outlet pipe (7) is connected to a suction pipe (72); the suction pipe (72) is connected to a negative pressure suction device; and a lower end of the pulp outlet pipe (7) is connected to a storage box (71).

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