Coating die head and coating device

Abstract

The utility model discloses a coating die head and a coating device, the coating die head is internally provided with a cavity, the coating die head is provided with a discharge slit communicated with the inside and the outside of the cavity in the coating working direction, the coating die head further comprises a first feed port, and the first feed port is formed in the other side, deviating from the coating working direction, of the coating die head and is communicated with the cavity; the plurality of second feeding holes are respectively formed in the first end and the second end in the transverse direction of the coating working direction of the coating die head and are communicated with the cavity; and the sliding block is arranged in the cavity and is pushed by the material entering from the second feeding hole to do reciprocating motion along the cavity in the transverse direction of the coating working direction. According to the scheme, the second feeding ports are formed in the first end and the second end, and the sliding block is arranged in the cavity. During use, materials enter the cavity from the second feeding port to push the sliding block to do reciprocating motion in the length direction of the cavity to clean the cavity. Therefore, according to the scheme, cleaning can be achieved without opening the cavity, and the time needed for maintenance and cleaning is shortened.

Description

TECHNICAL FIELD

[0001] The present disclosure relates generally to the technical field of battery production. More specifically, the present disclosure relates to a coating die, and further the present disclosure relates to a coating device. BACKGROUND

[0002] Energy saving and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0003] In the process of manufacturing batteries, extrusion coating technology is one of the core processes, which is known for its high precision coating capability. The coating die is a key component of this technology, which consists of two parts, forming a fine slit in the middle. This design ensures that the slurry can be uniformly extruded from the slit under precise pressure control and coated on the substrate.

[0004] The feed inlet on the commonly used coating die is usually located in the middle area, from which the slurry flows into the cavity and spreads to both sides. However, due to the principle of fluid dynamics, the flow rate of the slurry in the edge area will slow down, which may cause the slurry to accumulate in the corner. In addition, if the coating machine is not used for a long time or is stopped without timely cleaning, the slurry will accumulate inside the die, forming a deposit. This deposited slurry can seriously affect the uniformity of the coating during the coating process, which may cause appearance defects such as stripes, spots, etc., thereby reducing the overall appearance quality of the coated product. In addition, changes in coating thickness and uneven distribution can also have a negative impact on key performance such as energy density, cycle life, etc. of the battery. More critically, the unevenness of the coating can also affect the consistency of the battery cell, leading to increased performance differences between battery cells, ultimately affecting the overall performance of the entire battery pack.

[0005] To solve this problem, the coating die needs to be cleaned regularly after being used for a period of time. However, this cleaning process not only takes a long time, affecting production efficiency, but also causes waste of production materials due to the slurry removed.

[0006] Therefore, there is an urgent need to provide a coating die and a coating device to clean the die without opening the cavity, thereby improving the cleaning efficiency of the die. SUMMARY

[0007] To at least solve the technical problems mentioned above, the present disclosure provides a coating die and a coating device that can clean the die conveniently and efficiently.

[0008] In the first aspect, the coating die has a cavity inside, and a discharge slit on a side of the coating die facing a coating working direction, which communicates the inside and outside of the cavity. The coating die further comprises: a first feeding port, which is arranged on the other side of the coating die away from the coating working direction and communicates with the cavity; a plurality of second feeding ports, which are respectively arranged on the first end and the second end of the coating die in the transverse direction of the coating working direction and communicate with the cavity; and a slider, which is arranged in the cavity and has a shape adapted to the cavity and is adapted to reciprocate in the cavity in the transverse direction of the coating working direction under the pushing of the material entering from the second feeding ports.

[0009] In some embodiments, the coating die is provided with N cavities in parallel and in communication with each other, where N is a positive integer not less than 2; and the cavities extend in the transverse direction of the coating working direction.

[0010] In some embodiments, the plurality of second feeding ports are arranged at both ends of the cavity, or one second feeding port is arranged at each end of each cavity.

[0011] In some embodiments, the cavity has a slider with a shape adapted to the cavity, and the plurality of sliders are connected with each other or arranged independently.

[0012] In some embodiments, a stop wall is arranged between two adjacent cavities; the slider comprises a circumferential wall with an arc surface and an upper end wall with a flat surface, and the two adjacent sliders have a gap to avoid the stop wall; the outermost end of the two sliders at both ends are connected to form an upper end surface, and the adjacent sliders are connected to form a lower end surface, where the upper end surface is higher than the lower end surface, and the lower end surface abuts against the upper surface of the stop wall.

[0013] In some embodiments, the slider has a preset length, and the length direction is the same as the length direction of the cavity; the distance between the first feeding port and the two ends of the cavity has a difference, and the difference is the same as the length of the slider.

[0014] In the second aspect, the disclosure provides a coating device comprising the coating die described above.

[0015] In some embodiments, the coating device further comprises a first feeding pipeline in communication with the first feeding port, and a second feeding pipeline in communication with the second feeding port.

[0016] In some embodiments, the coating device further comprises: a second discharge pipeline in communication with the second feeding port; and two first three-way valves connected with a second communication pipe connected to the second feeding port and selectively connected to the second feeding pipeline and the second discharge pipeline.

[0017] In some embodiments, the coating apparatus further includes: a second three-way valve, which is connected to the main feed line and selectively connects the first feed line and the second feed line.

[0018] In some embodiments, the second feed line is a pipeline with one end connected to a first three-way valve and the other end connected to another first three-way valve, and the second feed line is connected to the second three-way valve through a first connecting pipe.

[0019] The coating die head provided above, in this embodiment, features multiple second feed ports at the first and second ends in the transverse direction of the coating working direction, and a slider within the cavity. During use, when material enters the cavity through the second feed ports, it provides a thrust to the slider, which then reciprocates along the length of the cavity under this thrust to clean it. Therefore, this solution allows for cleaning of the coating die head without opening the cavity, reducing the time and labor required for maintenance and cleaning. Furthermore, the slider's reciprocating motion driven by the material improves cleaning efficiency through this automatic cleaning mechanism. In some embodiments, the distance between the first feed port and both ends of the cavity has a difference, and this difference is the same as the thickness of the slider. This design ensures symmetry of the cavities on both sides of the feed port, thereby guaranteeing the uniformity of the coating area. Attached Figure Description

[0020] 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:

[0021] Figure 1 A schematic diagram of the coating die head according to an embodiment of this disclosure is shown;

[0022] Figure 2 A schematic diagram of a coating apparatus according to an embodiment of this disclosure is shown;

[0023] Figure 3 A cross-sectional view of the second mold head according to an embodiment of this disclosure is shown;

[0024] Figure 4 A schematic diagram of a slider according to an embodiment of this disclosure is shown.

[0025] In the diagram: 100, coating die head; 200, coating device;

[0026] 101. First die head; 102. Second die head; 103. First cavity; 104. Second cavity; 105. Gasket; 106. Discharge slit; 107. First feed port; 108. Second feed port; 109. Slider; 110. Stop wall;

[0027] 1091, First slider; 1092, Second slider; 1093, Upper end face; 1094, Lower end face;

[0028] 201. Main feed pipeline; 202. First feed pipeline; 203. Second feed pipeline; 204. Second discharge pipeline; 205. First three-way valve; 206. Second three-way valve; 207. First connecting pipe; 208. Second connecting pipe; 209. Main discharge pipeline. Detailed Implementation

[0029] 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.

[0030] 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.

[0031] 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.

[0032] 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]."

[0033] The specific embodiments disclosed herein will now be described in detail with reference to the accompanying drawings.

[0034] like Figure 1 and Figure 2 As shown, this disclosure provides a coating die 100, which has a cavity with a preset extension length inside, and the coating die 100 in the coating working direction (in Figure 1 The coating die 100 includes a first inlet 107, which is located on one side of the coating die 100 (in the width direction). The first inlet 107 is provided on one side of the coating die 100 in a direction opposite to the coating working direction. Figure 1 On the side wall of the coating die 100 (the other side in the width direction), and communicating with the cavity; a plurality of second feed ports 108 are respectively opened in the transverse direction of the coating working direction of the coating die 100 (in the width direction). Figure 1 The material is located at the first and second ends of the coating die 100 along its length and communicates with the cavity; and a slider 109 is disposed within the cavity and has a shape adapted to the cavity. The slider 109 is configured to reciprocate along the cavity in the transverse direction of the coating working direction under the push of the material entering through the second feed port 108.

[0035] The coating die 100 in this solution includes a first die 101 and a second die 102 having a predetermined extension length in the transverse direction of the coating working direction. The first die 101 and the second die 102 are fixed to each other and form a cavity with a predetermined extension length. A portion of the connection between the two is provided with a gasket 105 of a predetermined thickness, and the area without the gasket 105 forms a discharge slit 106 connecting the inside and outside of the cavity. The discharge slit 106 extends along the length direction of the coating die 100. A first feed port 107 communicating with the cavity is opened on the side wall of the second die 102, and a second feed port 108 communicating with the cavity is opened at both the first and second ends of the second die 102 in the length direction. In addition, a slider 109 adapted to the contour of the cavity is provided in the cavity of the coating die 100.

[0036] Specifically, the coating die has four sets of opposing sidewalls on its outer periphery, two sets at both ends in the length direction and the other two sets at both ends in the width direction. One set is inclined on the outer surface of the sidewall in the width direction, and the discharge slit 106 is located between these sidewalls. The other set is vertically arranged on the surface of the sidewall in the width direction, and the first feed port 107 is located on the second die 102 in this set of sidewalls.

[0037] In use, when material is injected into the cavity through the second inlet 108, this process applies a pushing force to the slider 109 inside the cavity. Driven by the pushing force of the material, the slider 109 moves back and forth along the length of the cavity. In this reciprocating motion, the slider 109 contacts the wall inside the cavity. Through this physical action, the slider 109 can scrape and remove the slurry accumulation inside the cavity, thereby achieving the purpose of cleaning the die head. Specifically, when material enters the cavity from the second inlet 108 at the first end, it pushes the slider 109 to move. The slider 109 pushes the deposits in the cavity towards the second inlet 108 at the second end, and causes the deposits to be discharged from the cavity through the second inlet 108 at the second end. When material enters the cavity from the second inlet 108 at the second end, the slider 109 moves towards the second inlet 108 at the first end under the push of the material, and causes the deposits to be discharged from the cavity through the second inlet 108 at the first end. Multiple cycles are performed to completely remove the deposits from the cavity, thus cleaning the cavity.

[0038] Those skilled in the art will understand that the first die 101 and the second die 102 can also be interconnected, and the discharge slit 106 can be a notch formed on the sidewall of the first die 101, the second die 102, or the first die 101 and the second die 102. Furthermore, the coating die 100 formed by the first die 101 and the second die 102 can be of various shapes, such as a cylinder, a cuboid, etc.

[0039] In some implementations, the second feed port is respectively opened on the end wall of the first end and the end wall of the second end, wherein the end wall of the first end and the end wall of the second end are both arranged perpendicularly to the side wall where the first feed port is located.

[0040] In this design, the second inlet 108 is located on a different sidewall than the first inlet 107. The second inlet 108 is located on the end wall of the first end and the end wall of the second die head 102, and both end walls are perpendicular to and connected to the sidewall where the first inlet 107 is located. That is, the feeding direction of the second inlet 108 is perpendicular to the discharge direction of the discharge slit 106 and the feeding direction of the first inlet 107. In this design, because the feeding direction of the second inlet 108 is the same as the extension direction of the cavity, the slurry can flow directly along the shape of the cavity, reducing flow resistance caused by inconsistent directions and improving feeding efficiency.

[0041] Of course, in other embodiments, the second feed port 108 is also located on the side wall where the first feed port 107 is located, and the feeding direction is the same as that of the first feed port 107. In this solution, the second feed port 108 can still communicate with the end of the cavity, but the feeding direction is different from that in the above solution.

[0042] In one specific implementation, the second mold head 102 has a groove with a smooth, rounded inner wall. The end of the first mold head 101 that abuts against the second mold head 102 has a planar structure. During installation, the first mold head 101 covers the second mold head 102 to form a cavity. That is, the cross-section of the cavity is semi-circular. The shape of the slider 109 is adapted to the shape of the cavity, so the cross-section of the slider 109 is also semi-circular, and the cross-section of the slider 109 is slightly smaller than that of the cavity. When the slider 109 is installed in the cavity, the outer periphery of the slider 109 abuts against the peripheral wall of the cavity, thereby enabling the slider 109 to scrape away the slurry accumulation in the cavity, thus achieving the purpose of cleaning the mold head.

[0043] Those skilled in the art will understand that the above solution is only an example. When the cavity is changed to other shapes, the slider 109 is also modified accordingly to adapt to the shape of the cavity.

[0044] In some embodiments, the slider 109 has a preset length, wherein the direction of the length is the same as the length direction of the cavity; the distance between the first feed port 107 and the two ends of the cavity has a difference, and the difference is the same as the length of the slider 109.

[0045] Those skilled in the art will understand that if the length of the slider 109 is set too thin, it may deform or be damaged, and it may also make the slider 109 unstable during movement. Therefore, the slider 109 in this disclosed solution has a preset length. It is worth noting that when the slider 109 is installed in the cavity, the extension direction of the length of the slider 109 is the extension direction of the length of the cavity.

[0046] In one specific implementation, the cavity has two ends along its length, namely a first end and a second end. A first distance between the first feed inlet 107 and the first end is greater than a second distance between the first feed inlet 107 and the second end, and the difference between the first and second distances is the same as the thickness of the slider 109. Thus, when the coating die 100 performs a coating operation instead of a cleaning operation, the slider 109 is positioned at the first end of the cavity, making the cavities on both sides of the first feed inlet 107 symmetrical, ensuring uniformity of the coating area.

[0047] Those skilled in the art will understand that when the coating die head 100 performs the coating operation, the slider 109 can also be set at the second end. At this time, the first distance between the first feed port 107 and the first end is less than the second distance between the first feed port 107 and the second end, and the difference between the second distance and the first distance is the same as the length of the slider 109.

[0048] In some embodiments, the coating die head has N interconnected cavities arranged side-by-side along its length, where N is a positive integer not less than 2; wherein the cavities extend laterally along the coating working direction. A plurality of second feed ports (108) are located at both ends of the cavities, or each cavity has one second feed port (108) at each end. The cavities have sliders adapted to the shape of the cavities, and the plurality of sliders are interconnected or independently arranged.

[0049] In this design, the coating die head has N interconnected cavities arranged side-by-side along its length, and these N interconnected cavities extend laterally along the coating working direction. A second feed port 108 is provided at both ends of each cavity. Each cavity has a slider adapted to that cavity, and the N sliders are interconnected. It is worth noting that N in this design is a positive integer not less than 2; for example, N can be 2, 3, or 4. In use, since the sliders in the N cavities are interconnected, the slider in the cavity connected to the second feed port will be driven by the material, which will drive the sliders in the other cavities to move, thereby achieving cleaning of each cavity.

[0050] Those skilled in the art will understand that, in order to ensure that the sliders in each cavity are driven and to complete the cleaning work more quickly and efficiently, a second feed port 108 can be provided at both ends of each cavity. Each cavity still contains a slider adapted to that cavity, and the N sliders can be interconnected or independently configured. During use, the material in the second feed port of each cavity provides a thrust to the slider in that cavity, thereby causing the slider to reciprocate and achieve cleaning.

[0051] Those skilled in the art will also understand that, since the N sliders are interconnected, multiple second feed ports 108 can also be disposed on different cavities. For example, when the coating die head has two cavities, the second feed port 108 at the first end in the length direction is disposed in the first cavity, and the second feed port 108 at the second end in the length direction is disposed in the second cavity. In use, when material enters through the second feed port of the first cavity, the slider in the first cavity is driven to move by the material's induction, and the slider in the second cavity moves when material enters through the second feed port of the second cavity. Therefore, this arrangement can still achieve the solution of this application.

[0052] like Figure 2 and Figure 3As shown, in a specific embodiment, the coating die 100 has not only one cavity, but two cavities arranged side by side along the width direction, namely a first cavity 103 and a second cavity 104, with the volume of the first cavity being larger than that of the second cavity. The cross-sectional contours of the first cavity 103 and the second cavity 104 are arc-shaped, and a stop wall 110 is provided between them. The height of the stop wall 110 is lower than that of the side wall of the second coating die 100, thereby allowing material to flow from the first cavity 103 over the stop wall 110 into the second cavity 104, or material to flow from the second cavity 104 over the stop wall 110 into the first cavity 103.

[0053] In this design, the first feed inlet 107 is connected to the first cavity 103, and both second feed inlets 108 are also connected to the first cavity 103. To simultaneously clean both cavities, the sliders 109 can be shaped to fit the shapes of the two cavities: a first slider 1091 and a second slider 1092, which are interconnected. This configuration allows the first slider 1091 to move along with the second slider 1092 when driven by the material, enabling the first slider 1091 to clean the first cavity 103 and the second slider 1092 to clean the second cavity 104.

[0054] Those skilled in the art will understand that in other embodiments, the two second feed ports 108 may only be connected to the second cavity 104, or the second feed ports 108 may be provided at both ends of the first cavity 103 and both ends of the second cavity 104. When the two cavities are connected to the second feed ports 108, the first slider 1091 and the second slider 1092 may be connected to each other or be set independently. Both of these configurations can achieve the purpose of cleaning the two cavities.

[0055] In some embodiments, a stop wall is provided between two adjacent cavities; the slider includes an arc-shaped peripheral wall and a flat upper end wall connected to each other, and there is a gap between two adjacent sliders to avoid the stop wall; the outermost ends of the two sliders at both ends are connected to form an upper end surface 1093, and the adjacent sliders are connected to each other to form a lower end surface 1094, wherein the upper end surface 1093 is higher than the lower end surface 1094, and the lower end surface 1094 abuts against the upper surface of the stop wall.

[0056] The above scheme describes that each of the N chambers is equipped with a slider, and the N sliders are interconnected. The following details how the sliders are connected and how they adapt to the chambers. Specifically, a stop wall is provided between two adjacent chambers, and a gap is provided between any two adjacent sliders to avoid the stop wall. More specifically, the second mold head in this scheme has a groove with a smooth inner wall, and the lower surface of the first mold head is flat, which covers the groove to form a chamber. Therefore, the slider in this scheme includes interconnected arc-shaped peripheral walls and flat upper end walls, wherein the arc-shaped peripheral walls abut against the inner wall of the second mold head, and the flat upper end walls abut against the inner wall of the first mold head. The outermost ends of the sliders at both ends are connected to form an upper end surface 1093, and adjacent sliders are interconnected to form a lower end surface 1094, wherein the upper end surface 1093 is higher than the lower end surface 1094, and the lower end surface 1094 abuts against the upper surface of the stop wall.

[0057] Those skilled in the art will understand that this solution has N sliders, and the upper surfaces of the N sliders are coplanar. That is, the N sliders in this solution have one upper surface and (N-1) lower surfaces.

[0058] like Figure 4 As shown, in one specific embodiment, the first slider and the second slider are semicircular in shape, respectively adapted to the shapes of the first cavity and the second cavity. Specifically, the first slider 1091 and the second slider 1092 in this embodiment are integrally formed structures, and a groove is formed between them. The shape of the groove is adapted to the shape of the stop wall 110. More specifically, the two sliders 109 are connected at their far ends to form an upper end surface 1093, and their adjacent ends are connected to form a lower end surface 1094 parallel to the upper end surface 1093, wherein the height of the upper end surface 1093 is higher than the height of the lower end surface 1094. Since the cross-sectional contours of the first slider 1091 and the second slider 1092 are both arc-shaped, a groove is formed between the two sliders 109.

[0059] When the slider 109 is installed in the cavity, the first slider 1091 is installed in the first cavity 103, and the second slider 1092 is installed in the second cavity 104. The groove on the slider 109 avoids the stop wall 110, and the lower end face 1094 abuts against the upper surface of the stop wall 110. The slider 109 can be fully adapted to the cavity, thereby enabling better cleaning of the inner peripheral wall of the cavity.

[0060] The high-efficiency coating die 100 disclosed herein automatically pushes the slider 109 through material flow to achieve cleaning inside the cavity, reducing manual intervention and improving the degree of automation in cleaning. Furthermore, this solution can achieve cleaning without opening the cavity, improving cleaning efficiency.

[0061] In some embodiments, this disclosure also provides a coating apparatus 200200, which includes the coating die head 100 described above.

[0062] Specifically, the coating apparatus 200 further includes a first feed pipe 202 connected to the first feed port 107, and a second feed pipe 203 connected to the second feed port 108.

[0063] In this design, a first feed inlet 107 is connected to a first feed pipe 202 for feeding material, and a second feed inlet 108 is connected to a second feed pipe 203 for feeding material. During the coating operation, both second feed pipes 203 are closed, and the first feed pipe 202 is opened for feeding material into the cavity. During the cleaning operation, the first feed pipe 202 is closed, and both second feed pipes 203 are opened. One feed pipe feeds material, and the slider 109 pushes the deposits, which are then discharged from the cavity through the other second feed pipe 203. This cycle repeats until the cavity is clean.

[0064] In some embodiments, the coating apparatus 200 further includes: a second discharge pipe 204 connected to the second inlet 108; and two first three-way valves 205 connected to a second connecting pipe 208 connected to the second inlet 108, and selectively connecting the second inlet pipe 203 and the second discharge pipe 204.

[0065] In the above scheme, the second feed pipe has two functions depending on the different feeding directions; that is, the second feed pipe is used as both a feed pipe and a discharge pipe. This can lead to sediment buildup in the second feed pipe 203, affecting cleaning efficiency. Therefore, in this scheme, a second discharge pipe 204 is additionally provided at the second feed inlet 108. Specifically, the second feed inlet 108 is connected to the second connecting pipe 208, which is connected to one port of the first three-way valve 205. The other two ports of the first three-way valve 205 are connected to the second feed pipe 203 and the second discharge pipe 204, respectively. In use, the first three-way valve 205 selectively connects either the second feed pipe 203 or the second discharge pipe 204.

[0066] It is worth noting that this design includes two first three-way valves 205 and two second connecting pipes 208. Specifically, a second connecting pipe 208 is connected to the second inlet 108 on the left side, and this second connecting pipe 208 is connected to a first three-way valve 205, which in turn connects to the second inlet pipe 203 and the second outlet pipe 204. The connection structure at the second inlet 108 on the right side is the same as on the left. In use, when material is fed from the left side, the second inlet pipe on the left side is open, and the second outlet pipe 204 is closed. Conversely, the second inlet pipe on the right side is closed, and the second outlet pipe 204 is open. Material enters the cavity through the second inlet pipe on the left side, passes through the second inlet 108 on the right side, and is discharged through the second outlet pipe (see attached diagram). Figure 1 (In the direction indicated by the middle arrow). When material is fed from the right, the second feed pipe on the right is open, and the second discharge pipe 204 is closed. The second feed pipe on the left is closed, and the second discharge pipe 204 is open. The material enters the cavity through the second feed pipe on the right, passes through the second feed port 108 on the left, and is discharged through the second discharge pipe.

[0067] In some embodiments, the coating apparatus 200 further includes a second three-way valve 206, which is connected to the main feed line 201 and selectively connects the first feed line 202 and the second feed line 203.

[0068] In this design, the coating apparatus 200 also includes a main feed pipe 201, which is connected to a second three-way valve 206. The second three-way valve 206 is also connected to a first feed pipe 202 and a second feed pipe 203, and can selectively open either the first feed pipe 202 or the second feed pipe 203. During the coating operation, the second feed pipe 203 is closed, and the first feed pipe 202 is opened. Material enters the first feed pipe 202 from the main feed pipe 201, and then enters the cavity through the first feed hopper. During the cleaning operation, the first feed pipe 202 is closed, and the second feed pipe 203 is opened. Material enters the second feed pipe 203 from the main feed pipe 201, and then enters the cavity through the second feed hopper to perform the cleaning operation.

[0069] In some embodiments, the second feed pipe 203 is a pipe with one end connected to a first three-way valve 205 and the other end connected to another first three-way valve 205, and the second feed pipe 203 is connected to the second three-way valve 206 through a first connecting pipe 207.

[0070] like Figure 2As shown, the second feed pipe 203 in this scheme is a single pipe, with one end connected to the second feed port 108 on the left and the other end connected to the second feed port 108 on the right. Specifically, one end of the second feed pipe is connected to the first three-way valve 205 on the left and the other end is connected to the first three-way valve 205 on the right. The second feed pipe 203 has an opening in the middle, at which a first connecting pipe 207 is connected. The other end of the first connecting pipe 207 is connected to the second three-way valve 206.

[0071] Alternatively, the second discharge pipe can also be a pipeline, with one end connected to the first three-way valve 205 on the left and the other end connected to the first three-way valve 205 on the right. The second feed pipe 203 has an opening in the middle, which is connected to the main discharge pipe 209. Material flowing out of the cavity passes through the second discharge pipe 204 and is discharged through the main discharge pipe 209.

[0072] In some implementations, the coating feed device is specially designed with two branch pipes (not shown in the figure) to accommodate the interconnected first cavity 103 and second cavity 104 on the coating die 100, both of which are connected to the second feed port 108. Specifically, the first branch pipe connects to the second feed port 108 on the first cavity 103, and the second branch pipe connects to the second feed port 108 on the second cavity 104. Both the first and second branch pipes are connected to the second connecting pipe 208.

[0073] The coating apparatus 200 disclosed herein can more conveniently perform feeding and discharging operations according to usage needs, thereby improving the user experience.

[0074] 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, wherein the coating die head has a cavity inside, and the coating die head has a discharge slit (106) communicating with the inside and outside of the cavity on one side facing the coating working direction, characterized in that, The coating die head also includes: The first feed inlet (107) is located on the side opposite to the coating working direction and is connected to the cavity; Multiple second feed ports (108) are respectively opened at a first end and a second end in the transverse direction of the coating working direction of the coating die head, and are connected to the cavity; and A slider (109) is disposed in the cavity. The slider (109) has a shape adapted to the cavity and is adapted to reciprocate along the cavity in the transverse direction of the coating working direction under the push of the material entering from the second feed port (108).

2. The coating die head according to claim 1, characterized in that, The coating die head has N interconnected cavities arranged side by side, where N is a positive integer not less than 2; wherein the cavities extend in the transverse direction along the coating working direction.

3. The coating die head according to claim 2, characterized in that, Multiple second feed ports (108) are provided at both ends of the cavity, or each cavity has a second feed port (108) at both ends.

4. The coating die head according to claim 2 or 3, characterized in that, The cavity has sliders adapted to the shape of the cavity, and the sliders are either interconnected or independently arranged.

5. The coating die head according to claim 4, characterized in that, A stop wall (110) is provided between two adjacent cavities; the slider includes an arc-shaped peripheral wall and a flat upper end wall connected to each other, and there is a gap between two adjacent sliders to avoid the stop wall; The outermost ends of the two sliders at both ends are connected to form an upper end face (1093), and adjacent sliders are connected to each other to form a lower end face (1094), wherein the upper end face (1093) is higher than the lower end face (1094), and the lower end face (1094) abuts against the upper surface of the stop wall.

6. The coating die head according to any one of claims 1-3, characterized in that, The slider (109) has a preset length, wherein the direction of the length is the same as the length direction of the cavity; The distance between the first feed port (107) and the two ends of the cavity has a difference, and the difference is the same as the length of the slider.

7. A coating apparatus, characterized in that, The coating apparatus includes the coating die head according to any one of claims 1-6, and further includes a first feed pipe (202) communicating with the first feed port (107) and a second feed pipe (203) communicating with the second feed port (108).

8. The coating apparatus according to claim 7, characterized in that, The coating apparatus further includes: The second discharge pipe (204) is connected to the second inlet (108); and Two first three-way valves (205) are connected to a second connecting pipe (208) connected to the second feed port (108), and one of them connects the second feed pipe (203) and the second discharge pipe (204).

9. The coating apparatus according to claim 7 or 8, characterized in that, The coating device further includes a second three-way valve (206), which is connected to the main feed line (201) and selectively connects the first feed line (202) and the second feed line (203).

10. The coating apparatus according to claim 9, characterized in that, The second feed pipe (203) is a pipe with one end connected to a first three-way valve (205) and the other end connected to another first three-way valve (205). The second feed pipe (203) is connected to the second three-way valve (206) through the first connecting pipe (207).

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