Casting slurry filtering device

Abstract

The utility model belongs to the technical field of tape-casting filtering devices, and discloses a tape-casting slurry filtering device. The tape casting slurry filtering device comprises a feeding pipe and a communicating pipe, the feeding pipe and the communicating pipe are fixedly communicated through a connector assembly, the communicating pipe is fixedly communicated with a plurality of branched pipelines, and the branched pipelines are uniformly distributed on the communicating pipe. According to the tape-casting slurry filtering device, the tape-casting slurry is subjected to branch management, single-path feeding can be adopted during working, when the filter screen of one pipeline is blocked by large-particle slurry and cannot work, the pressure gauge gives an alarm, at the moment, the valve of the branch pipeline is closed, the valve of the other branch pipeline is opened, slurry supply can be continued, and operation is convenient. And in this way, the filtering device can be switched on and off repeatedly, so that the continuity of feeding and casting of the whole batch of slurry is guaranteed, the passive situation that the machine needs to be shut down when one-way feeding is blocked, and equipment can be started after slurry feeding is stable after a pipeline is replaced is avoided, and the casting and feeding process is stable and efficient.

Description

Technical Field

[0001] This utility model relates to the technical field of casting filtration devices, specifically a casting slurry filtration device. Background Technology

[0002] Casting is a film forming technology widely used in the casting of green ceramic tapes for surface-mount electronic components such as HTCC, LTCC, and MLCC. It involves dispersing and mixing inorganic powders, organic solvents, organic additives, and organic binders into a homogeneous slurry with a certain viscosity and flowability. This slurry is then introduced into the casting box of a casting machine through degassing and filtration equipment. Under the action of a casting doctor blade, it is scraped into a wet film with a thickness of <4000μm. The film is then dried in the casting machine's drying tunnel, where the solvent evaporates, leaving a mixture of inorganic powders, organic additives, and organic binders, ultimately forming a uniform green ceramic tape with a thickness of ≤3000μm. The filtration process prevents impurities and large particles in the slurry from forming before casting, preventing defects such as foreign objects, pits, and protrusions on the surface of the green ceramic tape. In the experimental and pilot-scale stages, where the slurry volume is limited and the casting volume is small, a single filter screen may be sufficient to ensure the smooth completion of the entire casting process without clogging.

[0003] However, in actual large-scale production, what is needed is long-term, uninterrupted operation. Due to the different inorganic powders, the different organic system formulations used, and the different required film thicknesses, the filtration efficiency of various slurries is also different. High-viscosity slurries (such as HTCC slurries) may cause the filter screen to become clogged with impurities and particles after 2-3 hours of casting. It is necessary to stop the machine, disassemble, clean the filter screen, and reassemble it. Only when the slurry flow is stable can casting be smooth. This will greatly reduce the efficiency and quality of casting. At the same time, the slurry in the pipeline will be treated as waste during disassembly, cleaning and replacement, causing pollution and waste. The higher the frequency of replacement, the more manpower is required for cleaning, and the more pollution and waste there will be. This is a major problem that plagues casting operation.

[0004] Patent CN 208130595U discloses a cast slurry filter, including a filter cylinder, a filter screen, a filter screen support frame, and a quick connector. It adopts a large-inlet, small-outlet, large-area filter screen filtration and bottom-up slurry flow method to avoid insoluble matter from contacting the filter screen. Even if insoluble matter comes into contact with the filter screen, it is not easy to be pressed tightly onto the filter screen. The filter structure is simple, with only a filter screen and a filter screen support frame, avoiding too many dead corners and preventing the filter screen from being difficult to replace and clean after the slurry solidifies. However, this is not much different from a straight-through filter. In the actual cast slurry production process, the slurry is a high-viscosity substance, and inorganic powders will still be carried to the filter screen. The root cause of slurry flow, the micro-positive pressure, is always present, and clogging of the mesh is inevitable. At the same time, the volume of the cylinder is large, that is, the filter screen area is limited. As more and more impurities and particulate matter accumulate after a certain period of casting, the filtration effect of the filter will fail. The operator still has to stop casting, disassemble and clean the filter, and reinstall and adjust it to a stable casting state, which is not very practical. Therefore, we designed a cast slurry filtration device. Utility Model Content

[0005] The purpose of this utility model is to provide a casting slurry filtration device that enables the slurry to maintain continuous filtration throughout the casting process, allowing for stable and smooth operation over a long period of time, reducing slurry contamination and waste, improving the quality and efficiency of casting, and solving the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: A casting slurry filtration device includes an inlet pipe and a connecting pipe. The inlet pipe and the connecting pipe are fixedly connected via an interface assembly. A branch pipe is fixedly connected to the connecting pipe. The number of branch pipes is several and they are evenly distributed on the connecting pipe. A filter pipe is provided on the right side of the branch pipe. The filter pipe is fixedly connected to the branch pipe via an interface assembly. The outlet end of the filter pipe is fixedly connected to an outlet pipe via an interface assembly. A filter screen is provided inside the filter pipe. A pressure gauge is fixedly installed on the branch pipe. An electric valve is also fixedly installed inside the branch pipe.

[0007] Through the above technical solution, this application assembles the feed pipe, connecting pipe, branch pipe, filter pipe and discharge pipe through interface components to perform casting and filtration. At this time, the electric valve in the branch pipe is kept closed. When the feed pipe enters the slurry, the electric valve in the first branch pipe is opened, and the slurry enters the filter screen in the corresponding filter pipe for filtration, removing impurities or large particles in the slurry. When the filter screen in the first filter pipe gradually becomes clogged and loses its function, the slurry pressure in the branch pipe will increase, thereby triggering the pressure gauge to alarm. At this time, the electric valve in the first branch pipe is closed, the second branch pipe is opened for filtration, and so on, so as to achieve continuous filtration and continuous slurry supply. The pressure gauge is an electric contact pressure gauge that can alarm according to the set pressure range. It can be used for detection, alarm and interlock protection.

[0008] Preferably, the interface assembly includes a sleeve, a sealing gasket, a rotating rod, and a limiting block. The sleeve is fitted onto the outlet end of the branched pipe and the inlet end of the filter pipe. Two sealing gaskets are slidably connected inside the sleeve. A rotating rod is threaded onto the sleeve, and the bottom end of the rotating rod extends into the sleeve and is fixedly connected to the limiting block.

[0009] Through the above technical solution, the two ends of the two pipes are respectively inserted into the sleeve. The rotation of the rotating rod will drive the limiting block to change the angle, thereby squeezing the two sealing gaskets to contact the corresponding pipe ports for sealing. The installation and disassembly process is very simple and quick, saving a lot of operation time. At the same time, it can ensure the sealing of the connection between the two pipes. The discharge pipe is a flexible hose, so that it will not affect the installation and disassembly process when disassembling the filter pipe.

[0010] Preferably, the limiting block is in contact with two sealing gaskets, and the two sealing gaskets are in contact with the branch pipe and the filter pipe, respectively.

[0011] Preferably, a positioning block is fixedly connected to the inner wall of the filter pipe, the positioning block is in contact with the right end of the filter screen, and a limiting rod is movably connected to the filter pipe, the bottom end of the limiting rod extending into the filter pipe and contacting the front end of the filter screen.

[0012] With the above technical solution, the filter screen can be installed by placing it into the filter pipeline and making it contact with the positioning block. Then, the limiting rod is inserted to limit the filter screen, which can ensure that the filter screen remains stable during the filtration process and ensure the filtration effect.

[0013] Preferably, the discharge end of the discharge pipe is fixedly connected to a casting box, and the filter screen is a 150-350 mesh stainless steel wire mesh.

[0014] Through the above technical solution, the slurry in the casting box of this application is continuously scraped flat by the casting doctor blade and dried in the casting machine to form a ceramic film, thus completing the casting process. Only by continuously performing this process can the consistency of the thickness and quality of the cast ceramic film be guaranteed. Existing equipment will not be described in detail here. The design of the filter screen can be adjusted according to the type of casting slurry, casting thickness, viscosity, etc.

[0015] Preferably, the filter screen is truncated cone-shaped and adapted to the inner diameter of the filter pipe.

[0016] Through the above technical solution, the shape of the filter screen in this application not only has a good filtration effect, but also is more stable and faster during installation and disassembly.

[0017] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0018] 1. This casting slurry filtration device, through branched management of the casting slurry, allows for single-path feeding during operation. When the filter screen of one pipeline is blocked by large particles of slurry and cannot function, the pressure gauge alarms. At this time, the valve of this branch pipeline is closed and the valve of another branch pipeline is opened to continue slurry supply. The filtration device can perform multiple on / off actions to ensure the continuity of the entire batch of slurry supply for casting, avoiding the passive situation of having to stop the machine due to blockage of a single-path supply, replace the pipeline, and wait for the slurry supply to stabilize before restarting the equipment. This makes the casting slurry supply process stable and efficient.

[0019] 2. This cast slurry filtration device allows for quick disassembly and installation of pipelines through its interface component design, saving operation time. It also ensures the sealing of pipeline connections to prevent leakage. The filter screen is designed for quick removal and positioning, making disassembly easier during cleaning. It also offers good stability during installation, ensuring filtration effectiveness. Attached Figure Description

[0020] Figure 1 This is a three-dimensional schematic diagram of the present invention;

[0021] Figure 2 This is a schematic diagram of the internal structure of the branched pipeline and filter pipeline of this utility model;

[0022] Figure 3 This is a schematic diagram of the limiting block of this utility model;

[0023] Figure 4 This is a schematic diagram of the filter screen of this utility model.

[0024] In the diagram: 1. Feed pipe; 2. Connecting pipe; 3. Interface assembly; 31. Sleeve; 32. Sealing gasket; 33. Rotating rod; 34. Limiting block; 4. Branching pipe; 5. Filtering pipe; 6. Discharge pipe; 7. Filter screen; 8. Pressure gauge; 9. Electric valve; 10. Positioning block; 11. Limiting rod; 12. Casting material box. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-4 This utility model provides a technical solution: a casting slurry filtration device, including an inlet pipe 1 and a connecting pipe 2. The inlet pipe 1 and the connecting pipe 2 are fixedly connected by an interface component 3. A branch pipe 4 is fixedly connected to the connecting pipe 2. The number of branch pipes 4 is several and they are evenly distributed on the connecting pipe 2. A filter pipe 5 is provided on the right side of the branch pipe 4. The filter pipe 5 is fixedly connected to the branch pipe 4 by the interface component 3. The outlet end of the filter pipe 5 is fixedly connected to the outlet pipe 6 by the interface component 3. A filter screen 7 is provided in the filter pipe 5. A pressure gauge 8 is fixedly installed on the branch pipe 4. An electric valve 9 is also fixedly installed in the branch pipe 4.

[0027] Through the above technical solution, this application assembles the feed pipe 1, connecting pipe 2, branch pipe 4, filter pipe 5 and discharge pipe 6 through interface component 3 to perform casting and filtration. At this time, the electric valve 9 in the branch pipe 4 is kept closed. When the feed pipe 1 enters the slurry, the electric valve 9 in the first branch pipe 4 is opened, and the slurry enters the filter screen 7 in the corresponding filter pipe 5 for filtration, removing impurities or large particles in the slurry. When the filter screen 7 in the first filter pipe 5 gradually becomes clogged and loses its function, the slurry pressure in the branch pipe 4 will increase, thereby triggering the pressure gauge 8 to alarm. At this time, the electric valve 9 in the first branch pipe 4 is closed, and the second branch pipe 4 is opened for filtration, and so on, to achieve continuous filtration and continuous slurry supply. The pressure gauge 8 is an electric contact pressure gauge that can alarm according to the set pressure range. It can be used for detection, alarm, and interlock protection.

[0028] The interface component 3 includes a sleeve 31, a sealing gasket 32, a rotating rod 33, and a limiting block 34. The sleeve 31 is sleeved on the discharge end of the branch pipe 4 and the inlet end of the filter pipe 5. Two sealing gaskets 32 are slidably connected inside the sleeve 31. A rotating rod 33 is threadedly connected to the sleeve 31. The bottom end of the rotating rod 33 extends into the sleeve 31 and is fixedly connected to the limiting block 34.

[0029] Through the above technical solution, the two ends of the two pipes are respectively inserted into the sleeve 31. The rotation of the rotating rod 33 will drive the limiting block 34 to change the angle, thereby squeezing the two sealing gaskets 32 to contact the corresponding pipe ports for sealing. The installation and disassembly process is very simple and quick, saving a lot of operation time. At the same time, it can ensure the sealing of the connection between the two pipes. The discharge pipe 6 is a flexible hose, so that it will not affect the installation and disassembly process when the filter pipe 5 is disassembled.

[0030] The limiting block 34 is in contact with the two sealing gaskets 32, and the two sealing gaskets 32 are in contact with the branch pipe 4 and the filter pipe 5 respectively.

[0031] A positioning block 10 is fixedly connected to the inner wall of the filter pipe 5. The positioning block 10 is in contact with the right end of the filter screen 7. A limiting rod 11 is movably connected to the filter pipe 5. The bottom end of the limiting rod 11 extends into the filter pipe 5 and is in contact with the front end of the filter screen 7.

[0032] With the above technical solution, the filter screen 7 can be installed by placing it into the filter pipe 5 and making it contact with the positioning block 10. Then, the limiting rod 11 is inserted to limit the filter screen 7, which can ensure that the filter screen 7 remains stable during the filtration process and ensure the filtration effect.

[0033] The discharge end of the discharge pipe 6 is fixedly connected to the casting box 12, and the filter screen 7 is a 150-350 mesh stainless steel wire mesh.

[0034] Through the above technical solution, the slurry in the casting box 12 of this application is continuously scraped flat by the casting doctor blade and dried in the casting machine to form a ceramic film and complete the casting process. Only by continuously performing this process can the consistency of the thickness and quality of the cast ceramic film be guaranteed. The existing equipment will not be described in detail here. The design of the filter screen 7 can be adjusted according to the type of casting slurry, casting thickness, viscosity, etc.

[0035] The filter screen 7 is shaped like a frustum and is adapted to the inner diameter of the filter pipe 5.

[0036] Through the above technical solution, the shape of the filter screen 7 in this application not only has a good filtration effect, but also is more stable and faster during installation and disassembly.

[0037] When the casting slurry filtration device is working, both ends of the pipeline are inserted into the sleeve 31 respectively. The rotation of the rotating rod 33 will drive the limiting block 34 to change its angle, thereby squeezing the two sealing gaskets 32 into contact with the corresponding pipeline ports for sealing. After the assembly is completed, the casting process and filtration are carried out. At this time, the electric valve 9 in the branch pipeline 4 is kept closed. When the feed pipe 1 enters the slurry, the electric valve 9 in the first branch pipeline 4 is opened, and the slurry enters the filter screen 7 in the corresponding filter pipeline 5 for filtration, removing impurities or large particles in the slurry. When the filter screen 7 in the first filter pipeline 5 gradually becomes clogged and loses its function, the slurry pressure in the branch pipeline 4 will increase, thereby triggering the pressure gauge 8 to alarm. At this time, the electric valve 9 in the first branch pipeline 4 is closed, and the second branch pipeline 4 is opened for filtration, and so on, so as to achieve continuous filtration and continuous slurry supply. After the slurry supply is completed, the filter pipeline 5 can be removed through the interface component 3, and the clogged filter screen 7 can be taken out for cleaning.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A casting slurry filtering device, comprising an inlet pipe and a connecting pipe, wherein the inlet pipe and the connecting pipe are fixedly connected via an interface assembly, characterized in that: A branch pipe is fixedly connected to the connecting pipe. There are several branch pipes evenly distributed on the connecting pipe. A filter pipe is provided on the right side of the branch pipe. The filter pipe is fixedly connected to the branch pipe through an interface component. The discharge end of the filter pipe is fixedly connected to the discharge pipe through the interface component. A filter screen is provided inside the filter pipe. A pressure gauge is fixedly installed on the branch pipe. An electric valve is also fixedly installed inside the branch pipe.

2. The casting slurry filtration device according to claim 1, characterized in that: The interface assembly includes a sleeve, a sealing gasket, a rotating rod, and a limiting block. The sleeve is fitted onto the outlet end of the branched pipe and the inlet end of the filter pipe. Two sealing gaskets are slidably connected inside the sleeve. A rotating rod is threaded onto the sleeve, and the bottom end of the rotating rod extends into the sleeve and is fixedly connected to the limiting block.

3. The casting slurry filtration device according to claim 2, characterized in that: The limiting block is in contact with two sealing gaskets, and the two sealing gaskets are in contact with the branch pipe and the filter pipe, respectively.

4. The casting slurry filtration device according to claim 3, characterized in that: A positioning block is fixedly connected to the inner wall of the filter pipe, and the positioning block is in contact with the right end of the filter screen. A limiting rod is movably connected to the filter pipe, and the bottom end of the limiting rod extends into the filter pipe and contacts the front end of the filter screen.

5. A casting slurry filtration device according to claim 4, characterized in that: The discharge end of the discharge pipe is fixedly connected to a casting box, and the filter screen is a 150-350 mesh stainless steel wire mesh.

6. The casting slurry filtration device according to claim 5, characterized in that: The filter screen is shaped like a frustum and is adapted to the inner diameter of the filter pipe.

Images