Casting trough and casting machine

Abstract

The invention provides a tape casting trough and a tape casting machine, and belongs to the technical field of tape casting. The casting trough comprises a bevel guide plate and a scraper, the two sides of the inclined flow guide plate are provided with the slurry baffles, and a flow guide area is formed between the two slurry baffles on the inclined flow guide plate; the scraper and the bottom of the inclined flow guide plate are arranged at intervals to form a slurry dispersion area which is wider than a discharge hole in the lower end of the flow guide area. According to the slurry baffle plates, slurry entering the flow guide area is gradually extruded, accumulated and thickened by the slurry baffle plates on the two sides along with flowing, the scrapers and the slope flow guide plates are arranged at intervals to form the slurry dispersion area, the slurry is discharged from the discharge port of the flow guide area and then falls on the base belt moving below the casting trough, and at the moment, the two sides of the slurry are not limited by the slurry baffle plates any more; the two sides of the slurry are freely dispersed, the slurry is flatly laid on a base band after being scraped by a scraper to present a flow pattern with the thickness of the middle being uniform and the two sides being thin, and edge waste can be subjected to subsequent edge cutting treatment to obtain a high-quality casting product.

Description

Technical Field

[0001] The invention belongs to the technical field of tape casting, and in particular relates to a tape casting trough and a tape casting machine. Background Art

[0002] Cast tape technology is a molding process in which a slurry (such as ceramic, polymer, or metal slurry) is evenly coated onto a substrate and dried to form a film or green tape with uniform thickness and high density. Its core advantage lies in its ability to produce large-area, high-precision, uniformly thick films or sheets, making it particularly suitable for applications requiring extremely high material performance and structural consistency. Examples include high-power semiconductor packaging basebands for IGBT modules, electric vehicle inverters, and photovoltaic inverters; and high-frequency communication device basebands for 5G base station RF modules and millimeter-wave radar antenna basebands.

[0003] Prior art automatic feeding, documented in publication number CN214447874U, uses a peristaltic pump for feeding and an infrared sensor to control the liquid level. The infrared sensor collects signals and transmits them to a controller, which then outputs control signals to the peristaltic pump, thereby controlling the liquid level in the tank. However, this system is complex, requiring the sensor and controller to work together. Furthermore, the peristaltic pump hose has a short lifespan and requires frequent replacement, making it unsuitable for continuous operation.

[0004] In addition, common casting troughs all adopt a square frame structure. For casting troughs without a scraper, the trough walls on both sides block the casting slurry at the edges on both sides. As the casting slurry continues to flow and accumulate to the edges on both sides, the slurry at the edges on both sides is squeezed by the trough walls to form protruding thick points. The slurry is then laid on the base belt with protruding thick points to form a slurry layer; for casting troughs with a scraper, the square frame casting trough lays the slurry on the base belt and after it is scraped flat by the scraper, the cross-section of the slurry layer laid on the base belt is rectangular. The two sides at the two upper corners of the rectangle are in contact with the air, so its drying speed will be faster. Therefore, according to the Marangoni effect (the principle diagram is as follows Figure 1 As shown in the figure, at the interface between the two media, mass transfers from low to high concentration, resulting in thick spots on both sides of the slurry layer. Finally, these thick spots can cause cracking in the casting layer during drying, significantly affecting casting quality and leading to low slurry casting efficiency. Summary of the Invention

[0005] The first purpose of the present invention is to propose a casting material trough, in which slurry baffles are arranged on both sides of the inclined guide plate of the casting material trough, which first squeezes and "gathers" the edges of the casting slurry, and then the edges of the slurry are freely dispersed in the slurry dispersion area to achieve "release". After being scraped flat by a scraper, the edges of the slurry layer present a flow pattern that gradually becomes thinner from the middle to the two sides (the edge part is cut off in the subsequent cutting process), thereby solving the problem that the slurry layer laid in the existing casting material trough forms protruding thick points at the edge position and cracks after drying, affecting product quality.

[0006] The second purpose of the present invention is to propose a casting machine equipped with the above-mentioned casting trough, which ensures the dynamic balance between the output flow and input flow of the casting trough by precisely controlling the slurry delivery flow, thereby maintaining the liquid level height of the casting trough unchanged, ensuring equal scraper pressure, and ensuring uniform casting thickness.

[0007] The first object of the present invention is achieved through the following technical solutions:

[0008] A casting trough comprises an inclined guide plate and a scraper;

[0009] The scraper is located at the discharge end of the inclined guide plate, and the slurry is guided by the inclined guide plate and laid on the base belt located below the casting trough, and is then flattened by the scraper;

[0010] A first slurry baffle is provided on the first side of the inclined flow guide plate, a second slurry baffle is provided on the second side of the inclined flow guide plate, and the area between the first slurry baffle and the second slurry baffle on the inclined flow guide plate constitutes a flow guide area;

[0011] The scraper and the bottom of the inclined guide plate are spaced apart to form a slurry dispersion zone, and the width of the slurry dispersion zone is greater than the width of the discharge port at the lower end of the guide zone.

[0012] As an embodiment of the present invention, the first slurry baffle is a structure that gradually contracts from top to bottom, and is used to gradually narrow the width of the guide area. The width of the guide area reaches a minimum at the lower end discharge port.

[0013] As an embodiment of the present invention, the slurry retaining surface of the second slurry retaining plate is a structure that gradually contracts from top to bottom, and is used to gradually narrow the width of the guide area, and the width of the guide area reaches the minimum at the lower end discharge port.

[0014] As a preferred embodiment of the present invention, the angle between the edge of the guide area and the side of the inclined guide plate is α. The size of this angle α is important. The present invention aims to solve the problem of thick protrusions on the edge of the slurry layer. It is necessary to ensure that the width of the discharge port at the lower end of the guide area is narrower than the width of the two walls of the casting trough. In addition, it is necessary to ensure that the edge of the slurry has a sufficiently long distance when it is dispersed to both sides in the slurry dispersion area. Therefore, the angle α is preferably greater than 5°. If the angle α is too large, the width of the slurry layer will be too narrow, affecting the product production specifications. Therefore, the angle α should be less than 20°. Of course, in actual production, the angles between the edge of the first side and the edge of the second side of the guide area and the side of the inclined guide plate can be the same or different, and can be flexibly adjusted according to production requirements.

[0015] As another embodiment of the present invention, the slurry retaining surface of the first and / or second slurry retaining plate is a structure that first gradually converges and then flattens downward from top to bottom, and the width of the guide area first gradually narrows and then remains unchanged. In this way, the purpose of narrowing the width of the discharge port at the lower end of the guide area can also be achieved.

[0016] The key to solving the technical problem in the present invention is that the width of the outlet at the lowest end of the guide zone is smaller than the width between the two side walls of the casting trough. This allows the slurry flowing from the guide zone onto the base tape to disperse freely, ultimately forming a flow pattern at the edge of the slurry layer. When the slurry layer with the flow pattern enters the slurry heating system behind the casting trough and dries, it will not produce protruding thick spots due to the Marangoni effect, thus eliminating the problem of drying cracking. Therefore, the structure of the upper end of the slurry baffle in the present invention does not require special restrictions; the lower end of the slurry baffle only needs to be able to narrow the width of the guide zone outlet.

[0017] Therefore, the first slurry baffle and the second slurry baffle realize that the width of the discharge port at the lower end of the guide area is narrower than the width of the two trough walls of the casting trough, which provides space for the edge of the slurry layer laid on the base belt to freely disperse and form a flow pattern, and the distance between the scraper and the inclined guide plate provides time for the edge of the slurry layer to freely disperse, that is, through the close cooperation between the slurry baffle and the slurry dispersion area, the slurry edge is first "gathered" and then "released", thereby avoiding the formation of corners at the edge of the slurry layer, eliminating the protruding thick points formed due to the Marangoni effect or the extrusion of the trough wall of the casting trough, and improving the quality of the cast product.

[0018] Preferably, the casting trough of the present invention further comprises a material storage box, wherein the material storage box is provided with a feeding hole, which is connected to the slurry conveying pipeline of the casting machine to realize automatic feeding.

[0019] Preferably, the casting trough of the present invention further comprises a material storage box, wherein the material storage box is provided with a slurry outlet, which supplies the slurry to the inclined guide plate. In order to allow the slurry to enter the guide area evenly, the slurry outlet is designed to be slit-shaped.

[0020] The slit-shaped slurry outlet connects the material storage box and the guide area, and the slurry is evenly fed into the guide area through the slit-shaped slurry outlet during the process of continuously replenishing the slurry in the material storage box.

[0021] The second object of the present invention is achieved through the following technical solutions:

[0022] A tape casting machine comprises a feeding mechanism, a slurry conveying pipeline, a tape casting trough and a base tape retracting and releasing mechanism;

[0023] The feeding mechanism of the tape casting machine of the present invention includes a slurry barrel and a screw pump. The outlet of the slurry barrel is connected to the inlet of the screw pump. The driving mechanism (variable frequency motor) of the screw pump is connected to the frequency converter for adjusting the speed of the screw pump. Since the flow rate per revolution of the screw pump is fixed, the feeding amount of the slurry can be accurately controlled.

[0024] The consumption of slurry per unit time can be calculated based on the volume of the slurry layer in the casting material tank per unit time, so that the frequency converter can be used to control the frequency conversion motor and further control the feeding amount of the screw pump.

[0025] In the present invention, a slurry heating system is provided behind the casting trough, and the casting trough is connected to the outlet of the screw pump through a slurry delivery pipeline.

[0026] The base tape rewinding mechanism includes a rewinding wheel and an unrewinding wheel, which are respectively arranged on both sides of the casting material trough. The base tape is rewound after being unwound from the unrewinding wheel and passing through the casting material trough and the slurry heating system.

[0027] Preferably, a capacitive liquid level detector is provided in the slurry barrel to monitor the slurry situation in the slurry barrel in real time.

[0028] Preferably, the slurry conveying pipeline is further provided with a pressure detector and a filter, and the blockage of the pipeline can be checked through the data changes of the pressure detector.

[0029] The beneficial effects of the above technical solution of the present invention are as follows:

[0030] (1) For the casting material trough of the present invention, the slurry baffles make the slurry entering the guide area gradually squeezed and accumulated by the slurry baffles on both sides as it flows, and become thicker. The scraper and the inclined guide plate are spaced to form a slurry dispersion area. After the slurry is discharged from the outlet of the guide area, it falls on the base belt moving below the casting material trough. At this time, the two sides of the slurry are no longer limited by the slurry baffles, and the slurry is freely dispersed. After the slurry is scraped flat by the scraper, it is spread flat on the base belt to present a flow type with uniform thickness in the middle and thin on both sides. The edge waste can be obtained after subsequent trimming to obtain high-quality casting products. It can be seen that the present invention eliminates the problem of thick protrusions forming on the edge of the casting layer and cracking during drying, which affects the quality of the casting product.

[0031] (2) For the tape casting machine of the present invention, the rotation speed of the screw pump can be controlled by a frequency converter to accurately control the slurry flow in the slurry delivery pipe, thereby ensuring a dynamic balance between the slurry casting consumption and the slurry input flow, so that the slurry liquid level in the tape casting material tank remains unchanged, and the thickness of the slurry is stable throughout the entire process in the tape casting material tank. Therefore, it can be ensured that the pressure exerted on the slurry by the scraper at different times is stable, thereby making the thickness uniformity of the tape casting product better. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 This is a schematic diagram of the Marangoni effect principle of the slurry layer of the present invention;

[0033] Figure 2 Schematic diagram of the structure of the casting trough of Example 1 of the present invention;

[0034] Figure 3 for Figure 2 Schematic diagram of the top view structure;

[0035] Figure 4 Schematic diagram of the coordination of the casting trough, slurry delivery pipe and base belt according to Example 1 of the present invention;

[0036] Figure 5 for Figure 3 A side structural diagram of

[0037] Figure 6 Schematic diagram of the top view of the casting trough of Example 2 of the present invention;

[0038] Figure 7 Schematic diagram of the overall structure of the tape casting machine according to Example 3 of the present invention;

[0039] Figure 8 This is a top-down photo of a casting product produced without using the casting trough of the present invention;

[0040] Figure 9 This is a bird's-eye view of a casting product prepared using the casting trough of the present invention.

[0041] In the figure: 1, casting trough; 101, inclined guide plate; 1011, first slurry baffle; 1012, second slurry baffle; 102, scraper; 103, base belt; 104, guide area; 105, slurry dispersion area; 11, material storage box; 111, feed hole; 112, slurry outlet;

[0042] 2. Feeding mechanism; 201. Slurry barrel; 2011. Capacitive liquid level detector; 202. Screw pump; 203. Variable frequency motor;

[0043] 3. Slurry conveying pipeline; 301. Pressure detector; 302. Filter;

[0044] 4. Base tape retracting and unreeling mechanism; 401. Reeling wheel; 402. Unreeling wheel;

[0045] 5. Slurry heating system. DETAILED DESCRIPTION

[0046] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, a detailed description will be given below with reference to specific embodiments.

[0047] Example 1

[0048] A casting trough 1, such as Figure 2-5 As shown, the casting trough 1 includes an inclined guide plate 101 and a scraper 102;

[0049] The scraper 102 is located at the discharge end of the inclined guide plate 101. The slurry is guided by the inclined guide plate 101 and laid on the base belt 103 located below the casting trough 1, and is then flattened by the scraper 102.

[0050] A first slurry baffle 1011 and a second slurry baffle 1012 are respectively provided on the first side and the second side of the inclined guide plate 101. The area between the first slurry baffle 1011 and the second slurry baffle 1012 on the inclined guide plate 101 constitutes a guide area 104.

[0051] The inclined guide plate 101 and the bottom of the scraper 102 are spaced apart to form a slurry dispersion area 105 . The width A of the slurry dispersion area 105 is greater than the width B of the discharge port at the lower end of the guide area 104 .

[0052] In this embodiment, the first slurry baffle 1011 and the second slurry baffle 1012 are structures that gradually shrink from top to bottom, and are used to gradually narrow the width of the guide area 104. The width of the guide area 104 reaches the minimum at the lower end discharge port.

[0053] The angle between the edge of the guide area 104 and the side of the inclined guide plate 101 is α, and the value range of the angle α is 5° to 20°. In this embodiment, in order to solve the problem of protruding thick spots on the edge of the slurry layer laid on the base belt 103, it is necessary to ensure that the width B of the discharge port at the lower end of the guide area 104 is narrower than the width A of the slurry dispersion area 105 (that is, the width of the groove walls on both sides of the casting material groove 10). In addition, it is also necessary to ensure that the edge of the slurry layer has a sufficiently long distance when the slurry dispersion area 105 is dispersed to both sides. Therefore, the value of the angle α is preferably 5° or more to meet the above requirements. If the value of the angle α is too large, the width of the slurry layer will be too narrow, affecting the production specifications of the cast product. Therefore, the maximum value of the angle α needs to be comprehensively considered based on the final width of the cast product to be prepared and the inclined length of the inclined guide plate 101. In this embodiment, the maximum value of the angle α that does not affect the production specifications of the cast product is 20°.

[0054] In this embodiment, the first slurry baffle 1011 and the second slurry baffle 1012 realize that the width of the discharge port at the lower end of the guide area 104 is narrower than the width of the trough walls on both sides of the casting trough 1, which provides the space required for the flow for the edge of the slurry layer laid on the base belt 103 to freely disperse and form a flow pattern, and the distance between the inclined guide plate 101 and the scraper 102 provides the time required for the flow for the edge of the slurry layer to freely disperse, that is, through the close cooperation between the two slurry baffles and the slurry dispersion area 105, the slurry edge is first "gathered" on the inclined guide plate 101 and then "released" in the slurry dispersion area 105, thereby avoiding the formation of corners at the edge of the slurry layer laid on the base belt 103, eliminating the protruding thick points formed due to the Marangoni effect or the extrusion of the trough wall of the casting trough 1, and improving the quality of the casting product.

[0055] In addition, the casting trough of this embodiment also includes a material storage box 11, which is provided with a feed hole 111 and a slurry outlet 112. The feed hole 111 is connected to the slurry conveying pipe 3 of the casting machine to realize automatic feeding, and the slurry outlet 112 supplies the slurry to the inclined guide plate 101. In order to allow the slurry to enter the guide area 104 evenly, the slurry outlet 112 is designed to be slit-shaped in this embodiment. The slit-shaped slurry outlet 112 connects the material storage box 11 and the guide area 104. In the process of the slurry conveying pipe 3 continuously replenishing the slurry into the material storage box 11, the slurry is evenly fed into the guide area 104 through the slit-shaped slurry outlet 112.

[0056] Example 2

[0057] As can be seen from Example 1, because the width of the outlet at the lowest end of the guide zone 104 is smaller than the width between the two side walls of the casting trough 10, the slurry flowing from the guide zone 104 onto the base strip 103 can be freely dispersed in the slurry dispersion zone 105, ultimately forming a flow pattern at the edge of the slurry layer. This flow pattern prevents the slurry layer from producing thick spots due to the Marangoni effect during drying, thus eliminating the problem of drying cracking. Therefore, the upper end structures of the first slurry baffle 1011 and the second slurry baffle 1012 do not require special restrictions; the lower ends of the two slurry baffles only need to be able to narrow the width of the outlet of the guide zone 104.

[0058] like Figure 6 As shown, the difference between the casting trough 10 of this embodiment and that of the first embodiment is that the slurry retaining surfaces of the first slurry retaining plate 1011 and the second slurry retaining plate 1012 are structured to first gradually converge and then flatten downward from top to bottom, and the width of the guide area 104 is first gradually narrowed and then remains unchanged. In this way, the purpose of narrowing the width of the discharge port at the lower end of the guide area 104 can also be achieved.

[0059] Example 3

[0060] like Figure 7As shown, the embodiment provides a casting machine, including a casting tank 1, a feeding mechanism 2, a slurry conveying pipeline 3, and a base tape winding and unwinding mechanism 4;

[0061] In the embodiment, the feeding mechanism 2 includes a slurry barrel 201 and a screw pump 202, the outlet of the slurry barrel 201 is connected to the inlet of the screw pump 202, the driving mechanism of the screw pump 202 adopts a frequency conversion motor 203, the frequency conversion motor 203 is connected to a frequency converter (not shown in the figure) for adjusting the rotating speed of the screw pump 202, since the volume of the screw pump 202 is fixed per rotation, the feeding amount of the slurry to the storage box 11 can be accurately controlled;

[0062] Specifically, according to the thickness, width, speed and time of the casting layer, the consumption amount of the slurry per unit time can be calculated, for example, the casting thickness H is 0.02 cm, the casting width L is 30 cm, the speed is V=100 cm / min, and the casting time T is 1 min, so the casting consumption Q is H·L·V·T=60 cm 3 Therefore, as long as the slurry input amount is controlled to be 60 cm 3 , dynamic balance can be basically achieved. Since the edge of the slurry layer in the casting tank 1 is a flow pattern, the cross-sectional area of the slurry layer cannot be accurately calculated according to the length x width, and considering this, in actual production, the final feeding amount of the slurry is adjusted on the basis of 60 cm 3 , so that the consumption and replenishment of the slurry in the storage box 11 are balanced.

[0063] Slurry input amount control: when it is known that the consumption amount of the slurry in the casting tank 1 is about 60 cm 3 , and it is known that the screw pump 202 adopts a Noryl RV0.83 micro-metering screw pump, the volume per rotation is 1.5 mL, the rotating speed at the rated frequency of 50 Hz is 200 r / min, the frequency is controlled through a frequency converter (with a controller), the frequency range is 0-50 Hz, and the frequency and the rotating speed are in a linear relationship, so when the slurry input amount is 60 cm 3 , the rotating speed of the screw pump 202 can be controlled to 40 r / min and the frequency to 10 Hz.

[0064] Therefore, the casting machine of the embodiment can inversely deduce the rotating speed and frequency of the screw pump 202 according to the calculated consumption amount of the casting slurry, and then adjust the error to achieve dynamic balance between the consumption and feeding amount of the slurry.

[0065] In this embodiment, a slurry heating system 5 is installed after the casting tank 1. This system utilizes conventional casting machine equipment; this embodiment does not substantially modify the heating system. The casting tank 1 is connected to the outlet of the screw pump 202 via a slurry delivery pipe 3. The slurry delivery pipe 3 is also equipped with a pressure detector 301 and a filter 302. Changes in the pressure detector 301's data can be used to monitor pipe blockage.

[0066] The base tape rewinding mechanism 4 includes a rewinding wheel 401 and an unwinding wheel 402 , which are respectively arranged on both sides of the casting material tank 1 . The base tape 103 is unwound from the unwinding wheel 402 and then rewound by the rewinding wheel 401 after passing through the casting material tank 1 and the slurry heating system 5 .

[0067] In order to further realize automation, a capacitive liquid level detector 2011 is provided in the slurry barrel 201 to monitor the slurry situation in the slurry barrel 201 in real time, so as to promptly detect the situation of insufficient slurry, and an alarm can be equipped to give an alarm.

[0068] The working process of the tape casting machine: after the slurry is transported into the slurry barrel 201, it is metered and pumped into the slurry delivery pipe 3 by the screw pump 202, and then transported into the storage box 11 by the slurry delivery pipe 3. The slurry in the storage box 11 is sent into the guide area 104 on the inclined guide plate 101 through the slit-shaped slurry outlet 112. After being discharged from the guide area 104, the slurry becomes a combination of pressure flow and drag flow under the action of the moving base belt 103. The slurry flows at the edge of the slurry dispersion area 105 to form a flow structure. As the base belt 103 continues to move, the slurry passes through the scraper 102 (the gap between the scraper 102 and the base belt 103 can control the thickness of the slurry layer), and the surface of the slurry layer will be affected by the slurry. The slurry becomes smooth due to surface tension, and then the slurry is continued to be brought into the slurry heating system 5 by the base belt 103 to be heated to evaporate the solvent. The slurry is formed into a slurry layer with certain strength and toughness under the influence of the plasticizer and the binder. The slurry layer is subsequently trimmed (the part where the flow type is formed at the edge of the slurry layer is cut off) to obtain a cast product with reliable quality. However, in the production of a cast machine without the casting material trough, the protrusion thick point formed at the edge of the slurry layer is uncontrollable. Even if the trimming treatment is performed, the quality of the cast product cannot be guaranteed (the cracks at the edge of the slurry layer will spread to the center of the slurry layer when it is dry. The slurry layer has been damaged, and even trimming cannot solve the problem). Figure 8 and Figure 9 The diagrams shown are schematic diagrams of the casting products prepared before and after using the casting trough of the present invention, which can be seen from Figure 8 It can be clearly seen that the quality of the cast products is significantly affected, while the quality of the cast products produced using the cast trough is improved.

[0069] The above is a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A casting trough, characterized in that: Includes beveled deflector and scraper; A first slurry baffle is provided on the first side of the inclined flow guide plate, a second slurry baffle is provided on the second side of the inclined flow guide plate, and the area between the first slurry baffle and the second slurry baffle on the inclined flow guide plate constitutes a flow guide area; The scraper is located at the discharge end of the inclined guide plate, and the slurry is guided by the inclined guide plate and laid on the base belt located below the casting trough, and is then flattened by the scraper; The scraper and the bottom of the inclined guide plate are spaced apart to form a slurry dispersion zone, and the width of the slurry dispersion zone is greater than the width of the discharge port at the lower end of the guide zone.

2. A casting trough according to claim 1, characterized in that: The first slurry baffle is a structure that gradually contracts from top to bottom and is used to gradually narrow the width of the guide area. The width of the guide area reaches its minimum at the lower end discharge port.

3. A casting trough according to claim 1, characterized in that: The slurry retaining surface of the second slurry retaining plate is a structure that gradually contracts from top to bottom, and is used to gradually narrow the width of the guide area. The width of the guide area reaches its minimum at the lower end discharge port.

4. A casting trough according to claim 1, characterized in that: The included angle between the edge line of the guide area and the side edge of the inclined guide plate is α, 5°≤α≤20°.

5. A casting trough according to claim 1, characterized in that: The slurry retaining surface of the first slurry retaining plate and / or the second slurry retaining plate is a structure that first gradually contracts and then becomes straight downward from top to bottom, and the width of the guide area first gradually narrows and then remains unchanged.

6. A casting trough according to claim 1, characterized in that: The casting material trough also includes a material storage box.

7. A casting trough according to claim 6, characterized in that: The material storage box is provided with a feeding hole and / or a slurry outlet, and the slurry outlet supplies the slurry to the inclined guide plate.

8. A casting trough according to claim 7, characterized in that: The pulp outlet is in a slit shape, and the slit-shaped pulp outlet is connected to the material storage box and the diversion area.

9. A tape casting machine, characterized in that: It comprises a slurry conveying pipeline, a feeding mechanism connected by the slurry conveying pipeline, and the casting trough according to any one of claims 1 to 8; The feeding mechanism includes a slurry barrel and a screw pump. The outlet of the slurry barrel is connected to the inlet of the screw pump. The driving mechanism of the screw pump is connected to the frequency converter for adjusting the speed of the screw pump to achieve precise feeding.

10. A tape casting machine according to claim 9, characterized in that: The casting material trough also includes a slurry heating system and a storage box. The slurry heating system is arranged behind the casting material trough for completing slurry drying. The storage box is arranged before the casting material trough for feeding the casting material trough. The storage box is connected to the slurry conveying pipeline through the feeding hole.

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