Coating die head with slurry recovery device

Abstract

The utility model discloses a coating die head with a slurry recovery device. The coating die head comprises a die head body and a material receiving component. An opening is formed in the side part, facing the coating working direction, of the die head; a lower lip part is formed on the part, located below the opening, of the die head in the gravity direction by taking the coating working direction as a reference, and a coating is at least partially arranged on the lower lip part; in the gravity direction, the material receiving component is arranged below the opening and provided with a channel suitable for collecting the slurry from the lower lip part and a cavity for containing the slurry. According to the scheme disclosed by the invention, the slurry on the outer surface can be prevented from generating scratches on the workpiece to be coated, so that the coating quality can be improved.

Description

Technical Field

[0001] This disclosure generally relates to the field of battery manufacturing technology. More specifically, this disclosure relates to a coating die head with a slurry recovery device. Background Technology

[0002] In battery manufacturing, coating is a crucial step, as the quality of the coating determines the ease of subsequent lithium battery production processes, the quality of the batteries, and the production efficiency. The coating process relies heavily on the coating die, a key component widely used in the coating process. Its main function is to uniformly apply liquid materials (such as adhesives, coatings, or inks) onto the substrate surface. The coating die precisely controls the flow rate and pressure of the liquid material to evenly coat the moving substrate.

[0003] The coating die head can be divided into an upper die head and a lower die head, with a slit between them. During the extrusion coating process, the slurry can flow out through this slit and coat the substrate surface. Because the slurry has a certain weight, some of it may flow along the surface of the lower die head after exiting the slit. If not cleaned promptly, the slurry that has flowed onto the lower die head surface will adhere to it, potentially causing slurry waste. Furthermore, during the coating process, the slurry adhering to the outer surface of the lower die head may scratch the substrate, significantly reducing the coating effect.

[0004] In view of this, there is an urgent need to provide a coating die head with a slurry recovery device to avoid scratches on the workpiece to be coated by the slurry on the outer surface of the lower die head, thereby improving the coating quality. Utility Model Content

[0005] In order to at least solve one or more of the technical problems mentioned above, this disclosure proposes a solution for a coating die head with a slurry recovery device in several aspects.

[0006] In a first aspect, this disclosure provides a coating die head with a slurry recovery device, the device including a die head and a receiving component; wherein, an opening is formed on the side of the die head facing the coating working direction; a lower lip is formed on the portion of the die head below the opening along the gravity direction with reference to the coating working direction, and a coating is at least partially provided on the lower lip; along the gravity direction, the receiving component is disposed below the opening for collecting the slurry.

[0007] In some embodiments, a first channel is formed inside the die head, the first channel being connected to the opening, and the slurry is able to flow through the first channel.

[0008] In some embodiments, the lower lip of the mold head is inclined.

[0009] In some embodiments, the mold head includes a first mold head and a second mold head located above the first mold head; wherein a second channel is formed between the first mold head and the second mold head, a second opening is formed at the end of the second channel, and the first mold head side of the first mold head below the second opening is inclined and its surface is coated.

[0010] In some embodiments, the receiving component includes a first receiving component side and a second receiving component side parallel to the first receiving component side; the first receiving component side of the receiving component is connected to the lower lip; the second receiving component side is connected to the second side of the die head or the lower lip.

[0011] In some embodiments, one or more curved grooves are formed on the surface of the lower lip, and a coating is provided on the surface of the grooves.

[0012] In some embodiments, a rotatable baffle is provided on the first side of the receiving component opposite to the lower lip. The baffle is rotatable between a first position and a second position, such that when the baffle is in the first position, the baffle is away from the lower lip, and when the baffle is in the second position, the baffle is in contact with the lower lip.

[0013] In some embodiments, the baffle is provided with a gasket on the side that contacts the lower lip.

[0014] In some embodiments, the device further includes a receiving tank located below the receiving component; the receiving tank is connected to the receiving component and is used to receive the slurry; a stirrer is provided inside the receiving tank for stirring the slurry.

[0015] In some embodiments, the coating comprises a Teflon coating.

[0016] By using the coating die head with a slurry recovery device provided above, the disclosed solution can prevent the slurry on the outer surface from scratching the substrate during coating, thereby improving the coating quality. Attached Figure Description

[0017] The above and other objects, features, and advantages of exemplary embodiments of this disclosure will become readily apparent upon reading the following detailed description with reference to the accompanying drawings. In the drawings, several embodiments of this disclosure are illustrated by way of example and not limitation, and like or corresponding reference numerals denote like or corresponding parts, wherein:

[0018] Figure 1 A perspective view of a coating die head with a slurry recovery device, according to some embodiments of this disclosure, is shown;

[0019] Figure 2 A cross-sectional view of a coating die head with a slurry recovery device is shown, representing some other embodiments of this disclosure;

[0020] Figure 3 An oblique view of a mold head according to some embodiments of this disclosure is shown.

[0021] Explanation of reference numerals in the attached figures

[0022] 10 - Die head, 101 - First side of die head, 102 - Second side of die head, 11 - Opening, 12 - Upper lip, 13 - Lower lip, 131 - Groove, 16 - First die head, 161 - First side of first die head, 1611 - Notch, 1612 - First cavity, 162 - Second side of first die head, 163 - Third side of first die head, 17 - Second die head, 171 - First side of second die head, 172 - Second side of second die head, 173 - Third side of second die head, 18 - First channel, 19 - Second gasket, 20 - Receiving component, 21 - First side of receiving component, 211 - Baffle, 22 - Second side of receiving component, 40 - Receiving bucket. Detailed Implementation

[0023] The technical solutions in the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this disclosure, not all of them. Based on the embodiments in this disclosure, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.

[0024] It should be understood that the terms “comprising” and “including” used in this disclosure and claims indicate the presence of the described features, integrals, steps, operations, elements and / or components, but do not exclude the presence or addition of one or more other features, integrals, steps, operations, elements, components and / or collections thereof.

[0025] It should also be understood that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of this disclosure. As used in this disclosure and claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term “and / or” as used in this disclosure and claims refers to any combination and all possible combinations of one or more of the associated listed items, and includes such combinations.

[0026] As used in this specification and claims, the term "if" may be interpreted, depending on the context, as "when," "once," "in response to determination," or "in response to detection." Similarly, the phrase "if determined" or "if [described condition or event] is detected" may be interpreted, depending on the context, as "once determined," "in response to determination," "once [described condition or event] is detected," or "in response to detection of [described condition or event]."

[0027] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0028] Figure 1 An oblique view of a coating die head with a slurry recovery device, as shown in some embodiments of this disclosure, is illustrated. Figure 1 As shown, the device includes a die head 10 and a receiving component 20; wherein, the die head 10 has an opening 11 formed on its side facing the coating working direction; with the coating working direction as a reference, a lower lip 13 is formed on the portion of the die head 10 located below the opening 11 along the direction of gravity, and at least a portion of the lower lip 13 is coated; along the direction of gravity, the receiving component 20 is disposed below the opening 11, having a channel adapted to collect the slurry from the lower lip 13 and a cavity for receiving the slurry. In some embodiments, a first channel is formed inside the die head 10, the first channel being connected to the opening 11, and the slurry can flow in the first channel. In some embodiments, the lower lip 13 of the die head is inclined relative to the coating working direction, and the angle between the extension direction of the lower lip 13 and the coating working direction is an acute angle.

[0029] In some embodiments, the aforementioned die head can coat the workpiece to be coated. It is understood that the aforementioned die head 10 can be integrally formed, with an opening 11 formed on the side of the aforementioned die head 10 facing the coating working direction. A channel (not shown in the figure) can be provided inside the aforementioned die head 10, and a feed inlet can be provided on the surface of the aforementioned die head. One end of the aforementioned channel can be connected to the aforementioned feed inlet, and the other end of the aforementioned channel can be connected to the aforementioned opening 11. In some embodiments, the aforementioned slurry can enter the aforementioned channel from the aforementioned feed inlet and flow out from the aforementioned opening 11.

[0030] In some embodiments, the aforementioned die head 10 may be detachable. Specifically, the aforementioned die head 10 may include an upper die head and a lower die head, which may abut against each other. An opening 11 may be formed on the side of the upper and lower die heads facing the direction of coating operation. A recess may be formed on the surface of the lower die head facing the upper die head, and the surface of the upper die head facing the lower die head may be a plane. The recess and the plane may form a cavity (not shown in the figure). In some embodiments, a gasket may be provided in the contact area between the upper and lower die heads, and the gasket may have a first opening on its side near the opening 11. It is understood that when the slurry flows from the cavity along the channel, due to the obstruction of the gasket, the slurry may flow out towards the first opening of the gasket, and thus out through the opening 11.

[0031] In some embodiments, the aforementioned die head can coat a workpiece to be coated, and the workpiece can be located on the side of the aforementioned die head. In some embodiments, the side of the aforementioned die head facing the workpiece can be a first side 101 of the die head, and an opening 11 can be formed on the first side 101 of the die head. It is understood that the aforementioned opening 11 can be a coating slit extending along the width direction of the die head, and with the coating working direction as a reference, along the direction of gravity, the area on the first side 101 of the aforementioned die head below the opening 11 can be at least partially formed as a lower lip, and the area on the first side 101 of the aforementioned die head above the opening 11 can be at least partially formed as an upper lip. In some embodiments, the side of the aforementioned coating slit facing the aforementioned workpiece to be coated can be formed with a lip, and the aforementioned lip can extend toward the aforementioned workpiece.

[0032] In some embodiments, the first side 101 of the aforementioned die head may be inclined relative to the coating working direction. Further, the aforementioned lower lip 13 may be inclined relative to the coating working direction, and the extension direction of the aforementioned lower lip 13 may be at an acute angle to the coating working direction. Along the direction of gravity, the extension direction of the aforementioned lower lip 13 may be parallel to the lower lip 13, with one component direction being upward. By inclinedly configuring the aforementioned lower lip 13, the aforementioned slurry can be facilitated to flow along the surface of the lower lip 13.

[0033] In some embodiments, a coating may be provided at least partially on the surface of the lower lip 13 to reduce the accumulation of slurry on the surface of the lower lip 13. Specifically, the surface energy of the lower lip 13 may be modified to reduce the dyne value on the surface of the lower lip 13. It should be understood that the aforementioned surface energy modification may include techniques for processing the surface using physical or chemical methods, thereby changing the physical or chemical properties of the surface. The disclosed scheme does not limit the manner of the aforementioned surface energy modification. The aforementioned dyne value can be used to describe the surface tension coefficient and can be used to measure the surface tension. Specifically, the dyne value is closely related to surface energy. A high dyne value can represent high surface energy, indicating that the material has high adhesion and wettability. Conversely, a low dyne value can indicate low surface energy, indicating low adhesion.

[0034] In some embodiments, when no coating is applied to the lower lip 13, the dyne value on the surface of the lower lip 13 is high. After the slurry flows out from the opening 11, due to gravity and the viscosity of the slurry, some of the slurry can flow along the surface of the lower lip 13 of the die head 10 and accumulate and adhere to the surface of the lower lip 13. In this case, when the die head performs coating, it will form scratches on the surface of the workpiece to be coated, thereby affecting the final quality.

[0035] In some embodiments, a coating is at least partially provided on the lower lip 13, which can reduce the dyne value of the surface of the lower lip 13, thereby reducing slurry adsorption. In some embodiments, a receiving member 20 may be provided on the lower lip 13, the receiving member 20 having a channel for collecting slurry from the lower lip 13 and a cavity for containing the slurry. The slurry can drip from the surface of the lower lip 13 into the channel in the receiving member and flow into the cavity for containing the slurry, thereby reducing the slurry on the surface of the lower lip 13 while simultaneously collecting the slurry.

[0036] In some embodiments, a receiving container 40 may be provided below the aforementioned receiving component 20. The interior of the receiving container 40 may be provided with a stirring paddle, which can stir the aforementioned slurry and prevent the aforementioned slurry from depositing on the inner wall of the receiving container 40, thereby avoiding waste of the aforementioned slurry.

[0037] In some embodiments, the surface of the lower lip 13 may be roughened to reduce its surface roughness, thereby reducing the dyne value of the lower lip 13. In some embodiments, the coating may include a Teflon coating, which may be applied to the roughened area. It is understood that the surface of the Teflon coating may have extremely low surface tension, exhibiting strong non-stick properties, thus preventing the slurry from adhering to the surface of the lower lip 13.

[0038] By designing the aforementioned lower lip, the slurry can be prevented from adhering to the lower lip, thereby avoiding scratches on the substrate during coating and improving the coating quality.

[0039] In some embodiments, the receiving component 20 includes a first receiving component side 21 and a second receiving component side 22 parallel to the first receiving component side; the first receiving component side 21 of the receiving component 20 is connected to the lower lip 13; the second receiving component side 22 is connected to the second mold head side 102 or the lower lip 13.

[0040] In some embodiments, the aforementioned receiving component 20 may include a first receiving component side 21 and a second receiving component side 22. A baffle may be provided on the first receiving component side 21, and the baffle may abut against the aforementioned lower lip 13.

[0041] In some embodiments, the second side 22 of the aforementioned receiving component can be connected to the second side 102 of the aforementioned die head, or it can be connected to the aforementioned lower lip 13. It is understood that when the second side 22 of the aforementioned receiving component is connected to the second side 102 of the aforementioned die head, the lower lip 13 can be entirely coated, increasing the contact area between the slurry and the coating. Specifically, when the slurry flows along the lower lip 13, the distance the slurry flows on the lower lip 13 can be equal to the width of the lower lip surface, increasing the efficiency of slurry dripping.

[0042] In some embodiments, the second side 22 of the aforementioned receiving member can be connected to the lower lip 13. It is understood that a coating can be applied to a portion of the surface of the second side of the receiving member to reduce costs. When the slurry flows along the surface of the lower lip 13, some slurry flows to the contact area between the second side 22 of the receiving member and the lower lip 13, and flows onto the inner surface of the second side 22 of the receiving member. In this case, a coating can also be applied to the inner surface of the second side 22 of the receiving member, allowing the slurry to continue flowing along the inner surface of the second side 22 of the receiving member.

[0043] By setting up the aforementioned receiving component, the slurry can be prevented from accumulating on the lower lip 13, while also improving the efficiency of slurry collection.

[0044] In some embodiments, a rotatable baffle 211 is provided on the first side 21 of the receiving component 20 opposite to the lower lip 13. The baffle 211 is rotatable between a first position and a second position, such that when the baffle 211 is in the first position, the baffle 211 is away from the lower lip 13, and when the baffle 211 is in the second position, the baffle 211 is in contact with the lower lip 13. In some embodiments, a gasket is provided on the side of the baffle 221 that contacts the lower lip 13.

[0045] In some embodiments, the first side 21 of the aforementioned receiving component may be perpendicular to the second side 102 of the die head, and a through hole may be provided at the end of the first side 21 of the aforementioned receiving component. A rotatable connecting shaft is provided in the aforementioned through hole, and the first end of the aforementioned baffle 211 may be connected to the aforementioned connecting shaft. It is understood that the aforementioned baffle 211 can rotate around the aforementioned connecting shaft between a first position and a second position.

[0046] Specifically, when the aforementioned baffle 211 is in the first position, the second end of the aforementioned baffle 211 can move away from the aforementioned lower lip 13. At this time, the aforementioned baffle 211 can rotate to a preset angle so that the slurry can flow from the surface of the aforementioned lower lip 13 into the aforementioned receiving component 20. When the aforementioned baffle 211 is in the second position, the second end of the aforementioned baffle 211 can abut against the surface of the aforementioned lower lip 13, which can prevent the slurry in the receiving component 20 from settling due to the influence of external air. It is understood that a gasket can be provided on the second end of the aforementioned baffle 211. In some embodiments, the aforementioned gasket can be made of silicone material, which can prevent the aforementioned baffle 211 from scratching the aforementioned lower lip 13 while increasing the sealing effect and preventing the collected slurry from settling to the bottom of the tank.

[0047] Figure 2 Cross-sectional views of coating dies with slurry recovery devices according to other embodiments of this disclosure are shown, such as... Figure 2 As shown, the die head includes a first die head 16 and a second die head 17 disposed opposite to each other; wherein, a first channel 18 is formed between the first die head 16 and the second die head 17, and an opening 11 is formed at the end of the first channel 18 facing the coating working direction, and a lower lip 13 is formed on the side of the first die head 16 below the opening 11 along the gravity direction.

[0048] In some embodiments, the aforementioned die head may include a first die head 16 and a second die head 17. Specifically, the aforementioned first die head 16 may include a first side 161 and a second side 162, wherein the first side 162 is a side facing the second die head and is parallel to the coating working direction. The aforementioned first side 161 may at least partially form a lower lip 13 and be inclined relative to the coating working direction.

[0049] In some embodiments, the aforementioned second mold head 17 may include a first side 171 and a second side 172. The first side 171 may be the side facing the first mold head, and the first side 171 may be a plane. In some embodiments, the second side 172 may be inclined, and it is understood that the second side 172 and the first side 161 of the first mold head may be symmetrically arranged along the first channel 18.

[0050] In some embodiments, a second gasket 19 may be provided at the contact position between the first die 16 and the second die 17. It is understood that the distance between the first die 16 and the second die 17 may be the thickness of the second gasket 19. In some embodiments, a gasket opening may be provided on the side of the second gasket 19 facing the opening 11. The shape of the second gasket may be U-shaped, and the gasket opening of the second gasket may form a coating slit with the opening positions of the first die 16 and the second die 17.

[0051] In some embodiments, a notch 1611 may be formed in a first region on the second side 162 of the first mold head. The notch 1611, together with the second gasket 19 and the first side 171 of the second mold head, can form a first cavity 1612. The second region on the second side 162 of the first mold head can form a first channel 18 with the first side 171 of the second mold head. It is understood that the first dimension of the first channel 18 perpendicular to the first side 171 of the second mold head can be equal to the thickness of the gasket. The first dimension of the first channel 18 can be changed by changing the thickness of the gasket.

[0052] In some embodiments, the discharge port of the aforementioned first channel 18 may form an opening 11. It is understood that, along the direction of gravity, the aforementioned second side 162 of the first die head may be located below the aforementioned opening 11, and the aforementioned second side 172 of the second die head may be located above the aforementioned opening 181.

[0053] In some embodiments, one or more feed ports (not shown in the figures) may be provided on the third side 163 of the first die head 16 and / or the third side 173 of the second die head 17. It should be understood that the third side 163 of the first die head is the side opposite to the second side 162 of the first die head, and the third side 163 of the first die head may be perpendicular to the first side 171 of the second die head. In some embodiments, the third side 173 of the second die head may be the side opposite to the second side 172 of the second die head, and the third side 173 of the second die head may be perpendicular to the first side 171 of the second die head.

[0054] In some embodiments, a coating may be provided on the second side 162 of the first die head. This coating may include a Teflon coating, which can reduce the roughness of the second side 162 of the first die head, allowing the slurry to drip off the first side 161 of the first die head, thereby reducing the accumulation of the slurry on the second side 162 of the first die head. Furthermore, by tilting the second side 162 of the first die head, the separation effect of the slurry can be increased.

[0055] When the aforementioned device is in operation, the aforementioned slurry can be fed into the aforementioned first cavity 1612 through the aforementioned inlet, and then the aforementioned slurry can be transported into the aforementioned first channel 18. The aforementioned second side 162 of the aforementioned first die head and the aforementioned first side 171 of the aforementioned second die head squeeze the slurry, so that the aforementioned slurry can be uniformly extruded from the aforementioned opening 11 to perform the coating operation. It is understood that during the coating process, due to gravity and the viscosity of the slurry, some slurry can flow along the surface of the aforementioned first side 161 of the first die head, and when the aforementioned slurry flows onto the coating, it can drip down in a direction perpendicular to the first side of the second die head.

[0056] By setting the aforementioned coating, the aforementioned slurry can be prevented from accumulating on the first side of the first die head, thereby avoiding scratches on the surface of the workpiece to be coated during coating and thus improving the coating quality.

[0057] Figure 3 An oblique view of the mold head according to some embodiments of this disclosure is shown, such as Figure 3 As shown, one or more curved grooves 131 are formed on the surface of the lower lip 13, and a coating is provided on the surface of the grooves 131.

[0058] In some embodiments, the first side 101 of the aforementioned die head may include an upper lip 12, a lower lip 13, and an opening 11. The upper lip 12 may be located above the opening 11, and the lower lip 13 may be located below the opening 11. Specifically, the upper lip 12 and the lower lip 13 may be symmetrically arranged along the opening 11, which can more evenly distribute the slurry, thereby improving the consistency of the slurry distribution along the spray width direction at the opening position and improving the coating quality.

[0059] In some embodiments, the surface of the lower lip 13 may include a third region and a fourth region. A groove 131 may be formed in the third region, and the surface of the fourth region may be planar. A coating may be applied to both the third and fourth regions. When the slurry flows along the surface of the lower lip 13, some slurry may flow in the fourth region and drip into the receiving member 20; some slurry may flow along the groove 131. It is understood that because the groove 131 is curved, the flow distance of the slurry on the surface of the lower lip 13 can be increased, thereby increasing the contact distance between the slurry and the coating, and increasing the mass of slurry collected by the receiving tank 40.

[0060] In some embodiments, the aforementioned receiving component 20 and / or receiving tank 40 may also be provided with a vibration component. After the coating process is completed, the aforementioned vibration component can be turned on to vibrate, thereby causing some of the slurry accumulated on the surface of the lower lip 13 to drip down, which can increase the slurry recovery efficiency.

[0061] By configuring the aforementioned lower lip surface and the vibration component, the accumulation of the slurry on the first side of the first die head can be avoided, thus preventing scratches on the surface of the workpiece during coating and improving coating quality. Furthermore, slurry waste can be reduced, and slurry recycling efficiency can be improved.

[0062] Back Figure 1 In some embodiments, the device further includes a receiving tank 40 located below the receiving component 20; the receiving tank 40 is connected to the receiving component 20 and is used to receive the slurry; the receiving tank 40 is provided with a stirrer for stirring the slurry.

[0063] In some embodiments, a third opening may be provided on the lower side of the aforementioned receiving component 20, and the third opening may be connected to the aforementioned receiving tank 40. It is understood that the size of the aforementioned receiving component 20 may gradually decrease in the direction from the aforementioned receiving component 20 to the aforementioned receiving tank 40, allowing the aforementioned slurry to flow into the receiving tank through the aforementioned third opening along the inner wall of the receiving component 20. It is also understood that a coating may be provided on the inner wall of the aforementioned receiving component 20 to prevent the aforementioned slurry from adhering to the inner wall of the aforementioned receiving component 20.

[0064] In some embodiments, the interior of the aforementioned container 40 may also be equipped with a stirrer, which can stir the slurry inside the stirrer, thereby preventing the slurry from settling on the inner wall of the container 40 due to prolonged storage and reducing slurry waste.

[0065] While numerous embodiments of this disclosure have been shown and described herein, it will be apparent to those skilled in the art that such embodiments are provided by way of example only. Many modifications, alterations, and alternatives will occur to those skilled in the art without departing from the spirit and intent of this disclosure. It should be understood that various alternatives to the embodiments of this disclosure described herein may be employed in the practice of this disclosure. The appended claims are intended to define the scope of this disclosure and therefore cover equivalents or alternatives within the scope of these claims.

Claims

1. A coating die head with a slurry recovery device, characterized in that, include: The die head (10) and the receiving part (20); wherein, The die head (10) has an opening (11) on its side facing the coating working direction; With the coating working direction as a reference, a lower lip (13) is formed on the part of the die (10) located below the opening (11) along the direction of gravity, and at least part of the lower lip (13) is provided with a coating. Along the direction of gravity, the receiving component (20) is disposed below the opening (11) and has a channel adapted to collect the slurry from the lower lip (13) and a cavity for containing the slurry.

2. The coating die head according to claim 1, characterized in that, The mold head (10) has a first channel inside, which is connected to the opening (11), and the slurry can flow in the first channel.

3. The coating die head according to claim 1, characterized in that, The lower lip (13) of the die head is inclined relative to the coating working direction, and the angle between the extension direction of the lower lip (13) and the coating working direction is an acute angle.

4. The coating die head according to claim 2, characterized in that, The mold head includes a first mold head (16) and a second mold head (17) disposed opposite to each other; wherein, A first channel (18) is formed between the first die head (16) and the second die head (17), and an opening (11) is formed at the end of the first channel (18) facing the coating working direction. Along the direction of gravity, the side of the first mold head (16) below the opening (11) forms a lower lip (13).

5. The coating die head according to claim 1, characterized in that, The receiving component (20) includes a first receiving component side (21) and a second receiving component side (22) parallel to the first receiving component side; The receiving part (20) is connected to the lower lip (13) on the first side (21). The second side (22) of the receiving component is connected to the second side (102) of the die head or the lower lip (13).

6. The coating die head according to claim 1, characterized in that, One or more curved grooves (131) are formed on the surface of the lower lip (13), and a coating is provided on the surface of the grooves (131).

7. The coating die head according to claim 5, characterized in that, The receiving component (20) is provided with a rotatable baffle (211) on the first side (21) of the receiving component opposite to the lower lip (13). The baffle (211) can rotate between a first position and a second position, such that when the baffle (211) is in the first position, the baffle (211) is away from the lower lip (13), and when the baffle (211) is in the second position, the baffle (211) is in contact with the lower lip (13).

8. The coating die head according to claim 7, characterized in that, The baffle (221) has a gasket on the side that contacts the lower lip (13).

9. The coating die head according to claim 1, characterized in that, Along the direction of gravity, it also includes a receiving container (40) located below the receiving component (20); The container (40) is connected to the receiving component (20) and is used to contain the slurry; The container (40) is equipped with a stirrer for stirring the slurry.

10. The coating die head according to any one of claims 1-9, characterized in that, The coating includes a Teflon coating.

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