A coating die and a coating apparatus

Abstract

The application provides a coating die, comprising a discharge cavity, the discharge cavity having a first inlet and a second inlet arranged oppositely, and a discharge outlet; the feeding direction of the discharge cavity and the discharging direction have an included angle; the slurry leaves the coating die from the discharge outlet. Wherein, the feeding direction is the direction of the slurry flowing into the discharge cavity from the first inlet and the second inlet; the discharging direction is the direction of the slurry flowing out from the discharge outlet. In the above technical solution, since the first inlet and the second inlet are arranged oppositely, and the feeding direction and the discharging direction have an included angle, the slurry entering from the first inlet and the second inlet will meet and collide to offset part of the kinetic energy, and then turn to leave the die from the discharge outlet. Since the kinetic energy of the slurry is consumed inside the die, the impact on the proton membrane is smaller during the process of the slurry coating on the surface of the proton membrane, and the thickness unevenness of the coated slurry on the length of the discharge outlet can be effectively reduced.

Description

Technical Field

[0001] This application relates to the field of coating technology, and more specifically, to a coating die and a coating apparatus. Background Technology

[0002] In the existing coating die head, during the coating process, there is a problem where the thickness of the slurry at both ends is thicker along the length of the outlet, resulting in uneven coating thickness. Summary of the Invention

[0003] The purpose of this application is to provide a coating die head that makes the coating slurry more uniform in thickness along the length of the outlet.

[0004] The embodiments of this application are implemented as follows:

[0005] In a first aspect, embodiments of this application provide a coating die head, including a discharge chamber having a first inlet and a second inlet disposed opposite to each other, and the discharge chamber also having a discharge outlet; the feeding direction and the discharge direction of the discharge chamber form an angle; the slurry leaves the coating die head from the discharge outlet;

[0006] The feeding direction is the direction in which the slurry flows into the discharge chamber from the first and second feed inlets; the discharge direction is the direction in which the slurry flows out from the discharge outlet.

[0007] In the above technical solution, since the first and second feed ports are arranged opposite each other, and the feeding direction and the discharge direction form an angle, the slurry entering from the first and second feed ports will collide and offset some of the kinetic energy before turning and leaving the die head from the discharge port. When using the coating die head provided by the above technical solution for coating production, since the kinetic energy of the slurry is consumed inside the die head, the impact on the proton exchange membrane is smaller during the process of coating the slurry onto the surface of the proton exchange membrane, which can effectively reduce the uneven thickness of the coated slurry along the length of the discharge port.

[0008] In conjunction with the first aspect, in some embodiments, the feeding direction at the first feed port position and the feeding direction at the second feed port position are on the same straight line, so that the slurry entering the discharge chamber from the first feed port and the second feed port can move towards each other along the same straight line.

[0009] In the above technical solution, since the slurry entering the discharge chamber from the first feed port and the second feed port moves towards each other along the same straight line, more of the kinetic energy of the slurry can be canceled out, further improving the uneven thickness of the coated slurry along the length of the discharge port.

[0010] In conjunction with the first aspect, in some implementations, the discharge direction is perpendicular to the feed direction.

[0011] In conjunction with the first aspect, in some embodiments, the discharge chamber has a guide channel, a first inlet is located at a first end of the guide channel, a second inlet is located at a second end of the guide channel, and the guide channel is configured to allow slurry entering the discharge chamber to move along the extension direction of the guide channel.

[0012] In the above technical solution, by setting a guide groove, the slurry entering the discharge chamber moves along the guide groove. After the slurry enters the discharge chamber from the first feed port and the second feed port, it can collide better under the guidance of the guide groove, thereby offsetting the kinetic energy and further improving the uneven thickness of the coated slurry along the length of the discharge port.

[0013] In conjunction with the first aspect, some embodiments further include a feeding chamber for communicating with a feeding pipe, a first end of the feeding chamber being connected to a first inlet of the discharge chamber via a first connecting channel, and a second end of the feeding chamber being connected to a second inlet of the discharge chamber via a second connecting channel.

[0014] In conjunction with the first aspect, in some embodiments, both the first connecting flow channel and the second connecting flow channel include interconnected arc segments and straight segments; the arc segments are used to change the flow direction of the slurry during the movement of the slurry from the feed chamber to the discharge chamber, and the extension direction of the straight segments is parallel to the extension direction of the guide channel, and the straight segments are connected to the guide channel.

[0015] In the above technical solution, the straight sections in the first connecting channel and the second connecting channel are parallel to the extension direction of the guide groove. Therefore, the slurry can move along the extension direction of the guide groove before entering the discharge chamber, so that the slurry can move better along the guide groove after entering the discharge chamber, and further improve the uneven thickness of the coated slurry along the length of the discharge port.

[0016] In conjunction with the first aspect, in some embodiments, the mold head includes an upper mold head, a lower mold head, and a spacer located between the upper mold head and the lower mold head, the spacer being provided with a notch;

[0017] The first surface of the lower die head is provided with a first groove, a second groove, a first connecting groove, and a second connecting groove; one end of the first connecting groove is connected to one end of the first groove, and the other end is connected to one end of the second groove; one end of the second connecting groove is connected to the other end of the first groove, and the other end is connected to the other end of the second groove.

[0018] After the first side of the gasket covers the first surface of the lower die head, it forms a feed cavity, a first connecting flow channel and a second connecting flow channel;

[0019] The notch of the gasket is located above the second groove; the upper die head, the notch of the gasket, and the lower die head together form the discharge cavity; the second groove forms a guide groove.

[0020] In the above technical solution, the feeding cavity, the discharging cavity, the first connecting flow channel and the second connecting flow channel can all be obtained by processing the lower die head and combining it with other components, which can reduce the processing difficulty.

[0021] In conjunction with the first aspect, in some embodiments, the second groove extends in a straight line, and both ends of the second groove are covered by gaskets to form a straight segment at one end of the first connecting channel and one end of the second connecting channel.

[0022] In the above technical solution, the guide groove is formed by the second groove, which extends in a straight line. After the two ends of the second groove are covered by the gasket, a straight section is formed at the end of the first connecting channel and the second connecting channel. This allows the slurry to move a certain distance along the straight section before entering the discharge chamber through the first connecting channel and the second connecting channel. This allows the slurry to move better along the second groove, i.e. the guide groove in the discharge chamber, after entering the discharge chamber, further improving the uneven thickness of the coated slurry along the length of the discharge port.

[0023] In conjunction with the first aspect, in some embodiments, the depth of the first groove is greater than the depth of the second groove.

[0024] Secondly, embodiments of this application provide a coating apparatus including the coating die head provided in the first aspect. Attached Figure Description

[0025] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the structure of a coating die provided in an embodiment of this application;

[0027] Figure 2 A schematic diagram of the first surface of the lower die head in a coating die head provided in an embodiment of this application;

[0028] Figure 3 This is a schematic diagram of the structure of a gasket in a coating die provided in an embodiment of this application;

[0029] Figure 4 This is a schematic diagram illustrating the combination of a lower die head and a gasket in a coating die head, as provided in an embodiment of this application.

[0030] Figure 5 A schematic diagram of the feeding chamber, first connecting channel, second connecting channel and discharging chamber in a coating die provided for an embodiment of this application;

[0031] Figure 6 This is a schematic diagram of the discharge chamber in a coating die provided in an embodiment of this application.

[0032] Icons: 100 - Lower die head; 110 - First groove; 120 - Second groove; 130 - First connecting groove; 140 - Second connecting groove; 200 - Gasket; 210 - Notch; 300 - Upper die head; 400 - Discharge cavity; 410 - Discharge port; 420 - Guide groove; 500 - Feed cavity; 600 - First connecting flow channel; 610 - Curved segment; 620 - Straight segment. Detailed Implementation

[0033] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0034] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0036] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0037] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0038] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0039] The inventors of this application have discovered that during fuel cell production, when a slurry is coated onto the proton exchange membrane (PEM) using a coating process, the thickness of the slurry coated on the PEM surface along the length of the outlet of the die is affected by the impact force of the slurry. Under high impact force, the slurry thickness on the PEM along the length of the outlet is thicker at both ends and thinner in the middle. This is because a high impact force causes the slurry to move along the length of the outlet on the PEM surface. Due to surface tension and other factors, the slurry thickness on the PEM is thicker at both ends and thinner in the middle. The length of the outlet refers to the direction in which the outlet extends.

[0040] Based on this, this application provides a coating die head, which reduces the impact force when the slurry flows out of the die head outlet 410 by reasonably setting the internal structure of the die head.

[0041] The coating die head provided in this application includes a discharge chamber 400, which has a first inlet and a second inlet arranged opposite to each other. The slurry enters the discharge chamber 400 through the first inlet and the second inlet, and the direction of movement of the slurry into the discharge chamber 400 is the feeding direction of the discharge chamber 400. Figure 1 As shown, the discharge chamber 400 also has a discharge port 410, which is the same as the discharge port 410 of the coating die head provided in this application. The direction of movement of the slurry when it flows out of the discharge port 410 is the discharge direction of the discharge chamber 400.

[0042] In the coating die head provided in this application, there is an angle between the feeding direction and the discharging direction. It will be readily understood by those skilled in the art that, due to this angle, the slurry, after entering the discharge chamber 400, will not flow directly out of the discharge port 410 along the feeding direction. Furthermore, the first and second feed ports are positioned opposite each other, and the feeding direction of the slurry at the first and second feed ports has components in opposite directions.

[0043] During the coating process using the coating die head provided in this application, the slurry enters the discharge chamber 400 from the first inlet and the second inlet and then collides with each other, causing some of the kinetic energy of the slurry to be lost, and then flows out from the discharge port 410. Therefore, the impact force of the slurry when it flows out from the discharge port 410 can be reduced.

[0044] In some embodiments of this application, such as Figure 5 As shown, the feeding direction at the first inlet and the feeding direction at the second inlet are on the same straight line but opposite in direction (i.e., Figure 5 (The two opposite directions indicated by the middle arrows) are arranged so that the slurry entering the discharge chamber 400 from the first and second inlets can move in opposite directions along the same straight line. That is, in the coating die provided in the above embodiment, the kinetic energy of the slurry entering from the first and second inlets can theoretically be completely canceled out. Then, the slurry in the discharge chamber 400 flows out from the discharge port 410 under the push of the subsequently entering slurry, thereby further improving the uneven thickness of the coated slurry along the length of the discharge port 410. Of course, the fact that the feeding direction at the first inlet position and the feeding direction at the second inlet position are on the same straight line is only a preferred embodiment of this application. In some other embodiments, the feeding direction at the first inlet position and the feeding direction at the second inlet position may also have a certain angle, so that the kinetic energy of the slurry entering from the first and second inlets partially cancels out.

[0045] Preferably, the feeding direction and the discharge direction are perpendicular to each other. When the slurries collide along the feeding direction, their kinetic energy is canceled out, so that the slurry flows out of the discharge port 410 only under the impetus of the subsequently entering slurry, further reducing the impact force when the slurry flows out.

[0046] In some preferred embodiments of this application, such as Figure 1 , Figure 5 and Figure 6 As shown, the discharge chamber 400 provided in this application has a guide groove 420, wherein the guide groove 420 is a groove-shaped structure that serves a guiding function. A first inlet is located at the first end of the guide groove 420, and a second inlet is located at the other end of the guide groove 420. By providing the guide groove 420, the slurry entering the discharge chamber 400 from the first inlet and the second inlet moves along the guide groove 420, thereby allowing the slurry to collide more effectively to cancel out kinetic energy.

[0047] Of course, in other embodiments, the guide groove 420 may not be provided. After the slurry enters the discharge chamber 400 from the first feed port and the second feed port, the slurry entering from the first feed port and the second feed port can still collide due to the inertia of the slurry.

[0048] In some embodiments of this application, such as Figure 1 and Figure 5 As shown, the coating die provided in this application also has a feeding chamber 500, which is used to communicate with a feeding pipe. The first end of the feeding chamber 500 is connected to the first inlet of the discharge chamber 400 via a first connecting channel 600, and the second end is connected to the second inlet of the discharge chamber 400 via a second connecting channel. The slurry enters the feeding chamber 500 through the feeding pipe, and then is connected to the first inlet and the second inlet respectively via the first connecting channel 600 and the second connecting channel. Further, in some preferred embodiments, the feeding pipe is located at the midpoint of the feeding chamber 500 in the direction from the first end to the second end.

[0049] In the above embodiments, slurry can enter from both ends of the discharge chamber 400 (i.e., the first inlet and the second inlet) through only one feed pipe, simplifying the pipe connections during use. Of course, in some other embodiments, the feed chamber 500 may not be provided, and the first inlet and the second inlet of the feed chamber 500 may be connected to two feed pipes respectively.

[0050] Furthermore, in order to enable the slurry to move better along the guide groove 420 after entering the discharge chamber 400 from the first feed port and the second feed port, in some embodiments of this application, such as Figure 5 As shown, both the first connecting channel 600 and the second connecting channel include an arc segment 610 and a straight segment 620. The arc segment 610 is connected to the feed chamber 500, and the straight segment 620 is connected to the feed inlet of the discharge chamber 400. The extension direction of the straight segment 620 is parallel to the extension direction of the guide channel 420. That is, the slurry in the feed chamber 500 passes through the arc segment 610 and the straight segment 620 in the first connecting channel 600 in sequence, and then enters the discharge chamber 400 from the first feed inlet. The arc segment 610 in the first connecting channel 600 is used to change the flow direction of the slurry, and the straight segment 620 is used to stabilize the flow direction of the slurry, so that after entering the discharge chamber 400 through the first feed inlet, it can flow better according to the extension direction of the guide channel 420. Specifically, the first connecting channel 600 and the second connecting channel provided in this application can be U-shaped or arc-shaped, etc.

[0051] In the above embodiment, the first connecting channel 600 and the second connecting channel are connected by a straight section 620, which allows the slurry entering the discharge chamber 400 to move better along the direction of the guide groove 420, so that the kinetic energy of the slurry can be better canceled, and further improve the uneven thickness of the coated slurry along the length of the discharge port 410.

[0052] Of course, in some embodiments of this application, the first connecting channel 600 and the second connecting channel may not include the straight segment 620 but only the arc segment 610. In some embodiments, both the first connecting channel 600 and the second connecting channel extend along an arc, and the extension direction of the end of the first connecting channel 600 connected to the guide groove 420 is parallel to the extension direction of the guide groove 420, and the extension direction of the end of the second connecting channel connected to the guide groove 420 is parallel to the extension direction of the guide groove 420. By making the extension direction of the end of the first connecting channel 600 and the second connecting channel connected to the guide groove 420 parallel to the extension direction of the guide groove 420, it is also possible to ensure that when the slurry leaves the first connecting channel 600 and the second connecting channel and enters the guide groove 420, the flow direction is parallel to the extension direction of the guide groove 420.

[0053] This application achieves kinetic energy dissipation by having the slurry collide with the first and second inlets, which are positioned opposite each other within the coating die, after entering the discharge chamber 400. This reduces the impact force of the slurry flowing out of the coating die and effectively improves the length of the coated slurry at the discharge port 410. Figure 6 The thickness is uneven on the dimension shown in L. However, in this application, there are no restrictions on the form of the structure of the discharge cavity 400 included in the die head.

[0054] Example 1

[0055] This embodiment provides a coating die, such as Figures 1 to 6 As shown, the coating consists of an upper die head 300, a lower die head 100, and a spacer 200 sandwiched between the upper die head 300 and the lower die head 100. During the coating process using the coating die head provided in this embodiment, the upper die head 300 is located above the lower die head 100.

[0056] In this embodiment, the gasket 200 is a sheet structure with a notch 210, and the two side surfaces of the gasket 200 are respectively attached to the upper mold head 300 and the lower mold head 100.

[0057] In this embodiment, the first surface of the lower die head 100 is used to fit against the gasket 200. For example... Figure 2 As shown, a first groove 110, a second groove 120, a first connecting groove 130, and a second connecting groove 140 are provided on the first surface. One end of the first connecting groove 130 is connected to the first groove 110, and the other end of the first connecting groove 130 is connected to the second groove 120; one end of the second connecting groove 140 is connected to the other end of the first groove 110, and the other end of the second connecting groove 140 is connected to the other end of the second groove 120. Figure 1 , Figure 2 , Figure 4 ,and Figure 5As shown, after the gasket 200 is fitted onto the lower die head 100, the gasket 200 and the first groove 110 form the feed cavity 500. The gasket 200 and the first connecting groove 130 form the first connecting flow channel 600. Figure 5 The shaded area on the left side represents the projection of the first connecting flow channel 600 onto the first surface direction perpendicular to the lower die head 100. The arc segment 610, the gasket 200, and the second connecting groove 140 form the second connecting flow channel. Figure 5 The shaded area on the right is the arc segment 610 of the second connecting channel (projected in the direction perpendicular to the first surface of the lower die head 100); the gasket 200 covers both ends of the second groove 120 to form the straight segment 620 of the first connecting channel 600 and the straight segment 620 of the second connecting channel.

[0058] In this embodiment, as Figure 5 and Figure 6 As shown, the portion of the second connecting groove 140 located inside the notch 210 that is not covered by the gasket 200 is the guide groove 420 of the discharge chamber 400. In this embodiment, as... Figure 1 , Figure 2 and Figure 6 As shown, the discharge cavity 400 in the above embodiment is formed by the surface of the upper die head 300, the side of the gasket 200 forming the notch 210, the first surface of the lower die head 100, and the groove wall of the second connecting groove 140. Figure 6 The shaded area in the figure is the projection of the discharge cavity 400 in the direction perpendicular to the first surface of the lower die head 100. The first and second feed ports are both surrounded by the groove wall of the second connecting groove 140 and the edge of the gasket 200, and the discharge port 410 is surrounded by the edge of the first surface of the lower die head 100, the edge of the notch 210 and the surface of the upper die head 300.

[0059] In this embodiment, the length ratio of the guide groove 420 to the second groove 120 is between 0.8 and 1 (inclusive). For those skilled in the art, when the length ratio of the guide groove 420 to the second groove 120 is 1, after the gasket 200 is closed, the groove wall of the second groove 120 completely forms the guide groove 420, and the length of the straight segment 620 in the first connecting channel 600 and the second connecting channel is 0. When the length ratio of the guide groove 420 to the second groove 120 is less than 1, after the gasket 200 is closed, the middle part of the second groove 120 forms the guide groove 420 of the discharge cavity 400, and the two ends of the second groove 120 respectively form the straight segment 620 of the first connecting channel 600 and the straight segment of the second connecting channel.

[0060] Example 2

[0061] Based on the specific structure of the coating die head disclosed in Embodiment 1, the structure on the first surface of the lower die head 100 in this embodiment forms a symmetrical structure, with the axis of symmetry being an axis perpendicular to the extension direction of the first groove 110. Accordingly, the first groove 110 and the second groove 120 are parallel to each other. The first connecting groove 130 and the second connecting groove 140 both extend along a C-shaped curve and both connect the ends of the first groove 110 and the second groove 120. In some other embodiments, the first connecting groove 130 and the second connecting groove 140 may also extend along a U-shaped curve.

[0062] In this embodiment, as Figures 2 to 4 As shown, the inner edge of the notch 210 of the gasket 200 is located between the first connecting groove 130 and the second connecting groove 140. In other embodiments, the gasket 200 may also be located on two contour lines parallel to the extension direction of the second connecting groove 140 to partially cover the second connecting groove 140.

[0063] Example 3

[0064] Based on the specific structure of the coating die head disclosed in Example 1, the coating die head in this embodiment, as follows: Figure 1 As shown, the depth of the first groove 110 is greater than the depth of the second groove 120. During the coating process, as the slurry flows from the first groove 110 to the second groove 120 through the first connecting groove 130 and the second connecting groove 140 (that is, from the feed chamber 500 to the discharge chamber 400), the slurry at the bottom of the first groove 110 moves upward, converting some of the kinetic energy of the slurry into gravitational potential energy, which also reduces the impact force of the slurry when it flows out. In this embodiment, the depth of the first groove 110 is in the range of 10-20 mm, and the depth of the second groove 120 is in the range of 5-15 mm.

[0065] In this embodiment, the cross-sectional shapes of the first connecting groove 130 and the second connecting groove 140 are U-shaped or C-shaped with uniformly varying depths, wherein the cross-section is perpendicular to the slurry flow direction. Furthermore, a through-hole is provided at the bottom of the first groove 110, through which slurry from the supply pipe is fed into the first groove 110.

[0066] In the embodiments described above, a shim 200 is provided between the upper die head 300 and the lower die head 100, and the shim 200 participates in forming the discharge cavity 400. The thickness of the discharge port 410 can be adjusted by adjusting the thickness of the shim 200, wherein the thickness of the discharge port 410 is... Figure 1 The dimensions shown in T are as follows. In some other embodiments, the gasket 200 may not be provided, and correspondingly, a groove structure with one end open is provided in the upper die head 300 and / or the lower die head 100 to form the discharge cavity 400.

[0067] In other embodiments, other structural components may be used to surround the coating die head with discharge cavity 400 provided in this application, and are not limited to the existing upper die head 300, lower die head 100 and gasket 200 and other structures.

[0068] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A coating die head, characterized in that, Includes a discharge chamber, which has a first inlet and a second inlet disposed opposite to each other, and also has a discharge outlet; the feeding direction and the discharge direction of the discharge chamber form an angle; the slurry leaves the coating die head from the discharge outlet; Wherein, the feeding direction is the direction in which the slurry flows into the discharge chamber from the first feed port and the second feed port; the discharge direction is the direction in which the slurry flows out from the discharge port; The feeding direction at the first feed inlet position and the feeding direction at the second feed inlet position are on the same straight line and opposite in direction, so that the slurry entering the discharge chamber from the first feed inlet and the second feed inlet can move towards each other along the same straight line; The discharge chamber has a guide groove, the first inlet is located at the first end of the guide groove, the second inlet is located at the second end of the guide groove, and the guide groove is configured to allow the slurry entering the discharge chamber to move along the extension direction of the guide groove. It also includes a feeding chamber for communicating with a feeding pipe. The first end of the feeding chamber is connected to the first inlet of the discharge chamber through a first connecting channel, and the second end of the feeding chamber is connected to the second inlet of the discharge chamber through a second connecting channel.

2. The coating die head according to claim 1, characterized in that, The discharge direction is perpendicular to the feed direction.

3. The coating die head according to claim 1, characterized in that, Both the first connecting flow channel and the second connecting flow channel include interconnected arc segments and straight segments; the arc segments are used to change the flow direction of the slurry during the process of the slurry moving from the feed chamber to the discharge chamber, and the extension direction of the straight segments is parallel to the extension direction of the guide channel, and the straight segments are connected to the guide channel.

4. The coating die head according to claim 1, characterized in that, The die head includes an upper die head, a lower die head, and a spacer located between the upper die head and the lower die head, the spacer having a notch; The first surface of the lower die head is provided with a first groove, a second groove, a first connecting groove, and a second connecting groove; one end of the first connecting groove is connected to one end of the first groove, and the other end is connected to one end of the second groove; one end of the second connecting groove is connected to the other end of the first groove, and the other end is connected to the other end of the second groove. After the first side of the gasket covers the first surface of the lower die head, it forms the feeding cavity, the first connecting flow channel and the second connecting flow channel; The notch of the gasket is located above the second groove; the upper die head, the notch of the gasket, and the lower die head together form the discharge cavity; the second groove forms the guide groove.

5. The coating die head according to claim 4, characterized in that, The second groove extends in a straight line, and both ends of the second groove are covered by the gasket to form a straight segment at one end of the first connecting channel and one end of the second connecting channel.

6. The coating die head according to claim 4, characterized in that, The depth of the first groove is greater than the depth of the second groove.

7. A coating apparatus, characterized in that, Includes the coating die head as described in any one of claims 1-6.

Images