A casting device
By adopting a double scraper structure and optimizing the feeding section design in the casting device, the problems of air bubbles and uneven deposition of slurry during the casting process were solved, achieving uniform distribution of slurry on the carrier belt and a smooth film.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN TAOTAO TECH CO LTD
- Filing Date
- 2025-06-17
- Publication Date
- 2026-07-14
AI Technical Summary
In the prior art, the slurry generates bubbles and surface undulations due to flow impact during the casting process, resulting in uneven deposition on the carrier tape, forming stripe defects, and affecting the appearance and physical properties of the film.
Design a casting device with a two-scraper structure. The first scraper has a flow-dispersing section and a flow-equalizing section for buffering and removing air bubbles, while the second scraper is used to further mix the slurry. Combined with a hydrophobic coating and an optimized feed section design, this ensures that the slurry is deposited uniformly on the carrier belt.
This method achieves uniform deposition of slurry on the carrier belt, forming a cast film with uniform thickness and a smooth surface, reducing the impact of bubbles and flow impact, and improving the quality of the film.
Smart Images
Figure CN224489466U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the technical field of ceramic casting preparation, and more specifically, to a casting apparatus. Background Technology
[0002] Casting technology is a widely used process for preparing thin film materials, particularly in the production of functional ceramics, composite materials, and polymer films. In a typical casting machine operation, the slurry in the slurry tank is pumped parallel to the feed box under air pressure, then flows out of the feed box and passes through a doctor blade to form a uniform cast film on a carrier belt. The core of this process lies in precisely controlling the flow of the slurry and the gap of the doctor blade to ensure that the resulting film has consistent thickness and surface quality.
[0003] However, in actual production, the slurry experiences flow impact as it flows through the doctor blade. This impact stems from the hydrodynamic characteristics of the slurry as it flows out of the feed box, as well as the restrictive effect of the doctor blade on the slurry flow. Flow impact generates bubbles and surface undulations, further leading to uneven slurry deposition on the carrier belt, ultimately forming stripe defects on the surface of the cast film. These stripes not only affect the appearance quality of the film but may also adversely affect its physical properties. Utility Model Content
[0004] The purpose of this invention is to overcome the shortcomings of the prior art where the slurry cannot be uniformly deposited on the carrier belt due to bubbles and surface undulations caused by the flow of the slurry, thus forming stripe defects on the surface of the cast film. This invention provides a casting device in which the scraper design can not only buffer the flowing slurry, but also expel the gas in the slurry, so that the slurry can be uniformly deposited on the carrier belt, ensuring a smooth surface of the cast film.
[0005] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows:
[0006] A casting apparatus is provided, including a feeding section, a carrier belt, and a first scraper and a second scraper mounted on the carrier belt. The discharge end of the feeding section is connected to the feed end of the carrier belt. Both the first scraper and the second scraper are cylindrical. The first scraper has a turbulence-removing section for removing air bubbles in the slurry. A first gap is provided between the first scraper and the carrier belt for the slurry to flow through. A second gap is provided between the second scraper and the carrier belt for the slurry to flow through. The height of the first gap is greater than the height of the second gap. The turbulence-removing section is located on the slurry feed side of the first scraper, at the bottom of the first scraper side near the first gap.
[0007] In operation, the casting apparatus of this invention receives slurry flowing from the feeding section onto the carrier belt and continues to advance along it. At this point, the height of the slurry is greater than the height of the first gap. Therefore, the first scraper can buffer and mix the slurry, resulting in a more uniform mixture as it passes through the first scraper. Furthermore, when the slurry reaches contact with the first scraper, because its height is greater than the first gap, the upper portion of the slurry contacts the turbulence-reducing part on the first scraper. After contact with this turbulence-reducing part, the slurry flows downwards along it until it passes through the first gap. Upon contact with the turbulence-reducing part, it removes air bubbles from the slurry, ensuring that the slurry passing through the first gap is bubble-free. The slurry, passing through the first gap, advances on the carrier belt until it passes through the second gap between the second doctor blade and the carrier belt. The height of the second gap is smaller than the first gap; therefore, the second doctor blade also buffers and mixes the slurry, further homogenizing the slurry flowing through it. This, in turn, ensures that the slurry passing through the second gap is further homogenized. Thus, after the slurry passes through the second gap, a cast film with uniform thickness and a smooth surface can be formed on the carrier belt.
[0008] The casting device of this utility model is equipped with two scrapers. The first scraper buffers the slurry, allowing it to be evenly distributed on the carrier belt. At the same time, the first scraper can also puncture air bubbles inside the slurry and expel the gas. The second scraper can further level the slurry, forming a casting film with uniform thickness and smooth surface on the carrier belt.
[0009] Furthermore, the turbulence-inducing section includes multiple grooves, the axes of which are parallel to the axis of the first scraper. These grooves are sequentially arranged along the edge of the first scraper on its outer surface. The sidewalls of adjacent grooves form cutting edges, and the cross-sections of the grooves can be wavy or serrated. When the slurry flows into the grooves, local turbulence is created. The reverse flow of the turbulent slurry compresses the slurry flowing towards the first scraper. At this time, air bubbles within the slurry flowing towards the first scraper are squeezed and burst, expelled from the slurry. Simultaneously, the reverse-flowing slurry is also propelled forward by the forward-flowing slurry until it passes through the first gap. During this forward-flowing slurry propelling the reverse-flowing slurry forward, the slurry is further mixed, resulting in a more uniform distribution of components within the slurry flowing through the first gap.
[0010] Furthermore, the included angle between the two side walls of the groove is 60°-120°. With an included angle of 60°-120° between the two side walls of the groove, the side walls of the groove provide good guidance when the slurry flows in and out of the groove, making it easier to form local turbulence in the turbulent section.
[0011] Furthermore, the first scraper is also provided with a flow equalization section. The flow equalization section and the turbulence-disrupting section are sequentially arranged on the first scraper. The flow equalization section is horizontal with the carrier belt, and the flow equalization section is provided with turbulence patterns to promote uniform mixing of the slurry. The turbulence patterns are groove patterns or grid patterns. The groove patterns are straight lines with their lines parallel to the axis of the first scraper; the grid patterns are composed of crisscrossing lines, and the depth of the turbulence pattern lines is 0.1mm-1mm. The flow equalization section is located at the bottom of the first scraper and is horizontal with the carrier belt. That is, the top of the first gap is the flow equalization section, the bottom is the carrier belt, and the first gap is the gap between the flow equalization section and the carrier belt. The turbulence pattern can further turbulentize the slurry flowing through the flow equalization section. When the slurry in contact with the flow equalization section comes into contact with the turbulence pattern, a small local turbulence will be formed on the surface of the flow equalization section. The principle of the formation of the local turbulence is the same as that of the local turbulence formed in the turbulence section. The difference is that the local turbulence formed in the flow equalization section is smaller. The formation of local turbulence in the flow equalization section can further promote the uniform mixing of the slurry.
[0012] Furthermore, the surfaces of the first and second scrapers are provided with a hydrophobic coating. The hydrophobic coating reduces the adhesion of air bubbles to the scraper surface, promoting bubble detachment and discharge with the flow, and also reduces slurry adhesion to the scraper surface, reducing cleaning frequency and extending scraper life. The hydrophobic coating can be a low surface energy coating, such as polytetrafluoroethylene or a silicone-based coating. The hydrophobic coating is applied to the surfaces of the flow equalization and turbulence-disrupting sections of the first scraper.
[0013] Further, the feeding unit includes a material tank and a material box. One inclined sidewall of the material box is a guide wall, the bottom of which is connected to the feed end of the carrier belt. The inner cavity of the material box is provided with a receiving groove and an overflow groove. The bottom of the overflow groove is connected to the bottom of the receiving groove. The overflow groove and the receiving groove form a U-shaped flow channel in the material box. The top of the overflow groove is connected to the top of the guide wall. The material tank is connected to the bottom of the receiving groove through a guide pipe. The guide pipe and the overflow groove are located on opposite sides of the receiving groove. After the slurry in the material tank enters the material box, it first enters the receiving groove in the material box, and then flows along the receiving groove into the overflow groove in the material box. As the slurry in the material tank continuously enters the material box, the height of the slurry in the overflow groove and the receiving groove continuously increases until the height of the slurry in the overflow groove reaches a level that allows it to flow out from the top of the overflow groove. At this point, the slurry flows from the top of the overflow groove to the guide wall, and then flows downward along the guide wall until it flows towards the carrier belt. The inclusion of a receiving tank in this application allows the slurry at the bottom of the tank to form a relatively stable flow state, significantly mitigating the turbulence effect when the slurry enters the material box. This provides a more uniform slurry supply for subsequent molding, further stabilizing the slurry flow state and reducing the impact of flow impact on diaphragm molding. Specifically, experiments have shown that when the vertical height of the U-shaped channel is 5-10 times the horizontal width of the U-shaped channel, the mitigation effect on the turbulence effect when the slurry enters the material box is most significant.
[0014] Furthermore, the lower part of the guide wall is provided with a buffer section that can buffer the slurry flow rate, and the buffer section is fixedly connected to the guide wall. The buffer section on the guide wall can reduce the kinetic energy of the slurry as it flows downward along the guide wall, thus playing a buffering role. Specifically, the buffer section is located at the bottom of the guide wall because the kinetic energy of the slurry flowing downward along the guide wall is the greatest at the bottom. Therefore, when the buffer section is located at this location, the effect of reducing the impact force of the slurry is the best.
[0015] Furthermore, the material tank is equipped with stirring blades, which are installed inside the material tank and connected to a drive motor. The inlet of the material tank is located at the top, and the outlet of the material tank is located at the bottom. The outlet of the material tank is connected to the inlet end of the guide pipe. The stirring blades inside the material tank can uniformly mix the slurry inside the tank and prevent the slurry from settling.
[0016] Furthermore, the guide pipe is equipped with a filter and a valve. The filter inlet is located at the bottom of the filter, the filter outlet is located at the top of the filter, and the valve is located between the outlet of the material tank and the filter inlet. The filter inlet and outlet are located at the bottom and top of the filter, respectively, meaning the filter is vertically installed, which facilitates the discharge of gas inside the filter. The valve further facilitates control over the flow of slurry from the material tank into the filter.
[0017] Furthermore, the guide pipe located between the filter and the material box includes a first horizontal section, a vertical section, and a second horizontal section connected in sequence. The first horizontal section is connected to the outlet of the filter, and the second horizontal section is connected to the inlet of the material box. The guide pipe between the filter and the material box has two right-angle bends. When the slurry passes through the right-angle bends of the guide pipe, the direction of slurry movement changes, effectively releasing some of the kinetic energy of the slurry and reducing the impact force when the slurry enters the material box.
[0018] Compared with the prior art, the beneficial effects of this utility model are:
[0019] The casting device of this utility model is equipped with two scrapers. The first scraper buffers the slurry, allowing it to be evenly distributed on the carrier belt. At the same time, the first scraper can also puncture air bubbles inside the slurry and expel the gas. The second scraper can further level the slurry, forming a casting film with uniform thickness and smooth surface on the carrier belt. Attached Figure Description
[0020] Figure 1 This is a schematic diagram of the structure of a casting apparatus;
[0021] Figure 2 A schematic diagram of the structure of the first scraper of a casting apparatus;
[0022] Figure 3 This is a schematic diagram of the working state of the first scraper when the slurry flows through it. The arrows in the diagram indicate the direction of slurry flow.
[0023] Figure 4 This is a schematic diagram of the structure of groove and grid patterns.
[0024] In the attached diagram: 1. Carrier belt; 2. First scraper; 3. Second scraper; 4. Material tank; 5. Material box; 6. Guide pipe; 7. Agitator blade; 8. Filter; 9. Valve; 10. Groove pattern; 11. Mesh pattern; 201. Turbulence section; 202. Flow equalization section; 501. Guide wall; 502. Receiving tank; 503. Overflow tank; 504. Buffer section; 601. First horizontal section; 602. Vertical section; 603. Second horizontal section. Detailed Implementation
[0025] The present invention will be further described below with reference to specific embodiments. The accompanying drawings are for illustrative purposes only, representing schematic diagrams rather than actual physical objects, and should not be construed as limiting the scope of this patent. To better illustrate the embodiments of the present invention, some components in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.
[0026] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this patent. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.
[0027] Example 1
[0028] This embodiment is a first embodiment of a casting apparatus, such as... Figure 1 As shown, the system includes a feeding section, a carrier belt 1, and a first scraper 2 and a second scraper 3 mounted on the carrier belt 1. The discharge end of the feeding section is connected to the feed end of the carrier belt 1. Both the first scraper 2 and the second scraper 3 are cylindrical. The first scraper 2 is provided with a turbulence-removing section 201 to remove air bubbles in the slurry. A first gap is left between the first scraper 2 and the carrier belt 1 for the slurry to flow through. A second gap is left between the second scraper 3 and the carrier belt 1 for the slurry to flow through. The height of the first gap is greater than the height of the second gap. The turbulence-removing section 201 is located on the slurry feeding side of the first scraper 2, at the bottom of the side of the first scraper 2 near the first gap.
[0029] The working principle or process of this embodiment is as follows:
[0030] In this embodiment, during operation, the slurry flowing from the feeding section onto the carrier belt 1 continues to advance along the carrier belt 1. At this time, the height of the slurry is greater than the height of the first gap. Therefore, the first scraper 2 can buffer and mix the slurry, making the slurry flowing through the first scraper 2 more uniformly mixed. Furthermore, when the slurry reaches contact with the first scraper 2, because the height of the slurry is greater than the height of the first gap, the upper part of the slurry will contact the turbulence-reducing part 201 on the first scraper 2. After contacting the turbulence-reducing part 201, the slurry will flow downwards along the turbulence-reducing part 201 until it passes through the first scraper 2 along the first gap, such as... Figure 3 As shown. After the slurry comes into contact with the turbulence section 201, the turbulence section 201 removes air bubbles from the slurry, ensuring that the slurry passing through the first gap is bubble-free. The slurry passing through the first gap advances on the carrier belt 1 until it passes through the second gap between the second doctor blade 3 and the carrier belt 1. The height of the second gap is smaller than the first gap. Therefore, the second doctor blade 3 can also buffer and mix the slurry, further homogenizing the slurry flowing through the second doctor blade 3, thereby further homogenizing the slurry passing through the second gap and further reducing the thickness fluctuation of the slurry. Therefore, after the slurry passes through the second gap, a cast film with uniform thickness and a smooth surface can be formed on the carrier belt 1.
[0031] The beneficial effects of this embodiment are as follows:
[0032] The casting apparatus of this embodiment is equipped with two scrapers. The first scraper 2 acts as a buffer for the slurry, further reducing the forward speed of the slurry on the carrier belt 1, so that the slurry can be evenly distributed on the carrier belt 1. At the same time, the first scraper 2 can also puncture the air bubbles inside the slurry and expel the gas inside the slurry. The second scraper 3 can further perform leveling treatment on the slurry to form a casting film with uniform thickness and smooth surface on the carrier belt 1.
[0033] Example 2
[0034] This embodiment is a second embodiment of a casting apparatus, such as... Figures 1-3 As shown, this embodiment further defines the scraper based on embodiment one.
[0035] Specifically, the turbulence-disrupting part 201 includes multiple grooves, the axis of which is parallel to the axis of the first scraper 2. The multiple grooves are sequentially arranged along the edge of the first scraper 2 on its outer surface. The sidewalls of two adjacent grooves form a cutting edge, and the cross-section of the grooves can be wavy or serrated.
[0036] Specifically, the included angle between the two side walls of the groove is 60°-120°.
[0037] Specifically, the first scraper 2 is also provided with a flow equalization section 202. The flow equalization section 202 and the turbulence-disrupting section 201 are arranged sequentially on the first scraper 2. The flow equalization section 202 is horizontal with the carrier belt, and the flow equalization section 202 is provided with turbulence-disrupting patterns to promote uniform mixing of the slurry. The groove surface of the turbulence-disrupting section 201 is also provided with turbulence-disrupting patterns. Figure 4 As shown, the turbulence pattern is either a groove pattern 10 or a grid pattern 11. The groove pattern 10 is straight, and its lines are parallel to the axis of the first scraper 2. The grid pattern 11 is composed of crisscrossing lines, and the depth of the turbulence pattern lines is 0.1mm-1mm.
[0038] Specifically, the surfaces of the first scraper 2 and the second scraper 3 are provided with a hydrophobic coating.
[0039] The working principle or process of this embodiment is as follows:
[0040] When the slurry flows into the groove, it creates localized turbulence. The reverse movement of the turbulent slurry compresses the slurry flowing towards the first scraper 2. At this point, air bubbles within the slurry flowing towards the first scraper 2 are squeezed out and burst. Simultaneously, the reverse-flowing slurry is also propelled forward by the forward-flowing slurry until it passes through the first gap. The principle behind the formation of localized turbulence in the turbulence pattern is the same as that in the turbulence section 201, except that the localized turbulence in the flow equalization section 202 is smaller. The formation of localized turbulence in the flow equalization section 202 further promotes uniform mixing of the slurry.
[0041] The beneficial effects of this embodiment are as follows:
[0042] When the slurry passes through the turbulence section 201, the air bubbles inside the slurry are compressed and burst, being squeezed out of the slurry. Furthermore, the turbulence section 201 further mixes the slurry, resulting in a more uniform distribution of components within the slurry flowing through the first gap. The included angle between the two side walls of the groove is 60°-120°. The side walls of the groove provide good guidance as the slurry flows in and out of the groove, facilitating the formation of localized turbulence in the turbulence section 201. The turbulence patterns further turbulent the slurry flowing through the flow equalization section 202. The hydrophobic coating on the scraper surface reduces the adhesion of air bubbles, promoting their detachment and discharge with the flow. It also reduces slurry adhesion to the scraper surface, lowering the cleaning frequency and extending the scraper's service life.
[0043] Example 3
[0044] This embodiment is a third embodiment of a casting apparatus, such as... Figure 1 As shown, this embodiment further defines the feeding section based on embodiment one.
[0045] Specifically, the feeding section includes a material tank 4 and a material box 5. One inclined side wall of the material box 5 is a guide wall 501. The bottom of the guide wall 501 is connected to the feed end of the carrier belt 1. The inner cavity of the material box 5 is provided with a receiving groove 502 and an overflow groove 503. The bottom of the overflow groove 503 is connected to the bottom of the receiving groove 502. The overflow groove 503 and the receiving groove 502 form a U-shaped flow channel in the material box 5. The top of the overflow groove 503 is connected to the top of the guide wall 501. The material tank 4 is connected to the bottom of the receiving groove 502 through a guide pipe 6. The guide pipe 6 and the overflow groove 503 are located on both sides of the receiving groove 502. When the vertical height of the U-shaped flow channel is 5-10 times the horizontal width of the U-shaped flow channel, the turbulence effect of the slurry entering the material box 5 is most significantly reduced.
[0046] Specifically, the lower part of the guide wall 501 is provided with a buffer section 504 that can buffer the slurry flow rate, and the buffer section 504 is fixedly connected to the guide wall 501. The buffer section can be an arc-shaped structure provided at the bottom of the guide wall 501.
[0047] Specifically, the material tank 4 is equipped with a stirring blade 7, which is installed in the material tank 4 and connected to the drive motor. The inlet of the material tank 4 is located at the top of the material tank 4, and the outlet of the material tank 4 is located at the bottom of the material tank 4. The inlet end of the guide pipe 6 is connected to the outlet of the material tank 4.
[0048] Specifically, the guide pipe 6 is equipped with a filter 8 and a valve 9. The inlet of the filter 8 is located at the bottom of the filter 8, the outlet of the filter 8 is located at the top of the filter 8, and the valve 9 is located between the outlet of the material tank 4 and the inlet of the filter 8.
[0049] Specifically, the guide pipe 6 located between the filter 8 and the material box 5 includes a first horizontal section 601, a vertical section 602 and a second horizontal section 603 connected in sequence. The first horizontal section 601 is connected to the outlet of the filter 8 and the second horizontal section 603 is connected to the inlet of the material box 5.
[0050] The working principle or process of this embodiment is as follows:
[0051] The slurry entering the inner cavity of the slurry tank 4 through the inlet is stirred by the agitator blades 7 and then flows into the guide pipe 6 through the outlet of the slurry tank 4. After being filtered by the filter 8, the slurry continues to flow forward. The slurry then passes through the first horizontal section 601, the vertical section 602, and the second horizontal section 603 in sequence before entering the receiving tank 502 of the slurry box 5. It then flows along the receiving tank 502 into the overflow tank 503 within the slurry box 5. As the slurry in the slurry tank 4 continues to enter the slurry box 5, the height of the slurry in the overflow tank 503 and the receiving tank 502 continuously increases until the height of the slurry in the overflow tank 503 reaches a level where it can flow out from the top of the overflow tank 503. The slurry then flows from the top of the overflow tank 503 into the guide wall 501, and then flows downward along the guide wall 501 until it flows into the carrier belt 1.
[0052] The beneficial effects of this embodiment are as follows:
[0053] The inclusion of the receiving tank 502 allows the slurry at the bottom of the tank to form a relatively stable flow state, providing a more uniform slurry supply for subsequent molding, further stabilizing the slurry flow state, and reducing the impact of flow impact on membrane molding. The buffer section 504 located at the lower part of the guide wall 501 can reduce the kinetic energy of the slurry flowing downward along the guide wall 501, thus acting as a buffer. The stirring blades 7 inside the material tank 4 can uniformly mix the slurry in the material tank 4 and prevent slurry settling. The inlet and outlet of the filter 8 are located at the bottom and top of the filter 8, respectively, meaning the filter 8 is vertically installed, which facilitates the discharge of gas inside the filter 8. The valve 9 facilitates the control of the slurry from the material tank 4 entering the filter 8. The guide pipe 6 located between the filter 8 and the material box 5 includes a first horizontal section 601, a vertical section 602 and a second horizontal section 603 connected in sequence. That is, the guide pipe 6 between the filter 8 and the material box 5 is provided with two right-angle bends. When the slurry passes through the right-angle bend of the guide pipe 6, the movement direction of the slurry changes, which can effectively release part of the kinetic energy of the slurry and reduce the impact force when the slurry enters the material box 5.
[0054] In the specific implementation of the above embodiments, the technical features can be combined in any non-contradictory way. For the sake of brevity, not all possible combinations of the above technical features are described. However, as long as the combination of these technical features is not contradictory, it should be considered to be within the scope of this specification.
[0055] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.
Claims
1. A casting apparatus, characterized in that, The device includes a feeding section, a carrier belt (1), and a first scraper (2) and a second scraper (3) mounted on the carrier belt (1). The discharge end of the feeding section is connected to the feed end of the carrier belt (1). The first scraper (2) and the second scraper (3) are both cylindrical. The first scraper (2) is provided with a turbulence section (201) that can remove air bubbles in the slurry. A first gap is left between the first scraper (2) and the carrier belt (1) for the slurry to flow through. A second gap is left between the second scraper (3) and the carrier belt (1) for the slurry to flow through. The height of the first gap is greater than the height of the second gap.
2. The casting apparatus according to claim 1, characterized in that, The turbulence section (201) includes a plurality of grooves, the axis of which is parallel to the axis of the first scraper (2), and the plurality of grooves are arranged sequentially on the outer surface of the first scraper (2) along the edge line of the first scraper (2).
3. The casting apparatus according to claim 2, characterized in that, The included angle between the two side walls of the groove is 60°-120°.
4. The casting apparatus according to claim 1, characterized in that, The first scraper (2) is also provided with a flow equalization section (202), the flow equalization section (202) and the flow turbulence section (201) are arranged sequentially on the first scraper (2), the flow equalization section (202) is horizontal with the carrier belt (1), and the flow equalization section (202) is provided with flow turbulence patterns to promote uniform mixing of slurry.
5. The casting apparatus according to claim 4, characterized in that, The outer surfaces of the first scraper (2) and the second scraper (3) are both provided with a hydrophobic coating.
6. The casting apparatus according to claim 1, characterized in that, The feeding unit includes a material tank (4) and a material box (5). One inclined side wall of the material box (5) is a guide wall (501). The bottom of the guide wall (501) is connected to the feeding end of the carrier belt (1). The inner cavity of the material box (5) is provided with a receiving groove (502) and an overflow groove (503). The bottom of the overflow groove (503) is connected to the bottom of the receiving groove (502). The overflow groove (503) and the receiving groove (502) form a U-shaped flow channel in the material box (5). The top of the overflow groove (503) is connected to the top of the guide wall (501). The material tank (4) is connected to the bottom of the receiving groove (502) through a guide pipe (6). The guide pipe (6) and the overflow groove (503) are located on both sides of the receiving groove (502).
7. A casting apparatus according to claim 6, characterized in that, The lower part of the guide wall (501) is provided with a buffer part (504) that can buffer the flow rate of the slurry, and the buffer part (504) is fixedly connected to the guide wall (501).
8. A casting apparatus according to claim 6, characterized in that, The material tank (4) is equipped with a stirring blade (7), which is installed inside the material tank (4) and connected to the drive motor. The inlet of the material tank (4) is located at the top of the material tank (4), and the outlet of the material tank (4) is located at the bottom of the material tank (4). The inlet end of the guide pipe (6) is connected to the outlet of the material tank (4).
9. A casting apparatus according to claim 8, characterized in that, The guide pipe (6) is equipped with a filter (8) and a valve (9). The inlet of the filter (8) is located at the bottom of the filter (8), the outlet of the filter (8) is located at the top of the filter (8), and the valve (9) is located between the outlet of the material tank (4) and the inlet of the filter (8).
10. A casting apparatus according to claim 9, characterized in that, The guide pipe (6) located between the filter (8) and the material box (5) includes a first horizontal section (601), a vertical section (602) and a second horizontal section (603) connected in sequence. The first horizontal section (601) is connected to the outlet of the filter (8) and the second horizontal section (603) is connected to the inlet of the material box (5).