Coating die head and coating device

Abstract

The utility model belongs to the technical field of coating, and discloses a coating die head and a coating device.The coating die head comprises a first die head and a second die head in butt joint with the first die head, the first die head and the second die head are both of an integrated structure, the surface, facing the second die head, of the first die head is provided with a groove, the groove bottom wall of the groove is provided with a coating liquid distribution cavity, and the coating liquid distribution cavity is communicated with the first die head and the second die head. The groove extends to the first side face of the first die head, and the surface, facing the first die head, of the second die head covers the groove and is matched with the groove to form the strip seam, so that a gasket does not need to be independently arranged, frequent disassembly and washing or replacement of the gasket is avoided, the use cost is reduced, the disassembly time is saved, and the coating efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of coating, in particular to a coating die head and a coating device. Background Art

[0002] Slit coating die is a commonly used coating die. It is a coating technology that can press the coating liquid along the die gap under a certain pressure and transfer it to the moving substrate. It represents the future development direction of wet coating with its characteristics of fast coating speed, good coating uniformity and wide coating window.

[0003] The currently commonly used slot coating die structure generally includes an upper die part, a gasket part, a lower die part and a connecting part, which form a coating slot. The slurry flows out of the coating die through the coating slot and is coated on the substrate.

[0004] However, during the production process, the gaskets need to be frequently disassembled and cleaned, and thus they will inevitably be damaged during use, which will increase the cost. Utility Model Content

[0005] The purpose of the utility model is to provide a coating die head and a coating device to solve the problems in the prior art that the gasket needs to be frequently disassembled and cleaned, the gasket is easily damaged, and the cost increases.

[0006] To achieve this purpose, the present invention adopts the following technical solutions:

[0007] Coating die, including:

[0008] A first die head, the first die head is an integrated structure;

[0009] The second die head is an integrated structure and is connected to the first die head;

[0010] The surface of the first die head facing the second die head is provided with a groove, the bottom wall of the groove is provided with a coating liquid distribution cavity, the groove extends to the first side surface of the first die head, and the surface of the second die head facing the first die head covers the groove and cooperates with the groove to form a slit.

[0011] Preferably, the bottom wall of the groove is inclined and extends to the first side surface of the first die head.

[0012] Preferably, a side of the coating liquid distribution cavity close to the slit and the bottom wall of the groove adopt an arc transition.

[0013] Preferably, a liquid inlet channel and a liquid outlet channel are further provided in the first die head, and one end of each of the liquid inlet channel and the liquid outlet channel is connected to the coating liquid distribution cavity, and the other end is connected to the outside.

[0014] Preferably, the liquid inlet channel and the liquid outlet channel are arranged at an angle, and the extension direction of the liquid outlet channel is the same as the width direction of the first die head.

[0015] Preferably, the connection position between the liquid outlet channel and the coating liquid distribution chamber is located on the side of the connection position between the liquid inlet channel and the coating liquid distribution chamber close to the second die head in the second direction.

[0016] Preferably, the first die head is provided with a plurality of fixing holes at intervals outside the groove, and the second die head is provided with a plurality of mounting holes corresponding one-to-one to the plurality of fixing holes. When the second die head covers the first die head, a plurality of fixing parts are passed through the mounting holes one-to-one and connected to the fixing holes.

[0017] Preferably, the second die head includes a second side surface, and the second side surface is coplanar with the first side surface in the first direction.

[0018] Preferably, the first die head and the second die head are both made of anodized metal materials.

[0019] The coating device comprises the above-mentioned coating die head.

[0020] Beneficial effects of the utility model:

[0021] The utility model proposes a coating die and a coating device, the coating die comprising: a first die and a second die docked with the first die, the first die and the second die are both integral structures, a groove is provided on the surface of the first die facing the second die, a coating liquid distribution cavity is provided on the bottom wall of the groove, the groove extends to the first side surface of the first die, the surface of the second die facing the first die covers the groove and cooperates with the groove to form a slit, no gasket is required to be separately provided, frequent disassembly or replacement of the gasket is avoided, the use cost is reduced, the disassembly time is saved, and the coating efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a coating die head provided by an embodiment of the present utility model;

[0023] Figure 2 This is a schematic structural diagram of a coating die head provided by an embodiment of the present invention from another perspective;

[0024] Figure 3 It is a structural schematic diagram of another state of the coating die provided by an embodiment of the present utility model.

[0025] In the picture:

[0026] 1. First die head; 11. Groove; 111. Arc structure; 12. First side; 13. Fixing hole; 2. Second die head; 21. Mounting hole; 22. Second side; 3. Slit; 4. Fixing piece; 5. Coating liquid distribution chamber; 6. Liquid inlet channel; 7. Liquid outlet channel; 8. Coating base; 9. Coating liquid bridge. DETAILED DESCRIPTION

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are intended only to illustrate the present invention and are not intended to limit the present invention. It should also be noted that, for ease of description, the accompanying drawings only illustrate portions relevant to the present invention, not all of its components.

[0028] In the description of this utility model, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on the specific circumstances.

[0029] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0030] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. Furthermore, the terms "first" and "second" are used solely for descriptive purposes and have no special meaning.

[0031] On the one hand, this embodiment provides a coating die head that does not require a separate gasket, thus avoiding frequent disassembly, cleaning or replacement of the gasket, reducing the cost of use, saving disassembly time, and improving coating efficiency.

[0032] like Figure 1-Figure 2 As shown, the coating die includes a first die 1 and a second die 2. Specifically, the first die 1 is an integral structure, and the second die 2 is an integral structure and docks with the first die 1. The surface of the first die 1 facing the second die 2 is provided with a groove 11, and the bottom wall of the groove 11 is provided with a coating liquid distribution cavity 5. The groove 11 extends to the first side surface 12 of the first die 1. The surface of the second die 2 facing the first die 1 covers the groove 11 and cooperates with the groove 11 to form a slit 3. It can be understood that by providing a groove 11 on the surface of the first die head 1 facing the second die head 2, and the groove 11 extends to the first side surface 12 of the first die head 1, when the second die head 2 and the first die head 1 are docked, the surface of the second die head 2 facing the first die head 1 covers the groove 11, and cooperates with the groove 11 to form a slit 3, the opening of the slit 3 is located on the first side surface 12, and the formed slit 3 is connected to the coating liquid distribution chamber 5, and the coating liquid flows from the coating liquid distribution chamber 5 to the slit 3 and flows out from the opening of the slit 3, so that the slit 3 is formed by the cooperation of the structures of the first die head 1 and the second die head 2 themselves, without the need to separately set a gasket between the first die head 1 and the second die head 2, thereby avoiding frequent disassembly or replacement of gaskets, reducing the use cost of the coating die, saving disassembly time, and improving coating efficiency.

[0033] Furthermore, the first die head 1 is provided with a plurality of fixing holes 13 spaced apart outside the groove 11, and the second die head 2 is provided with a plurality of mounting holes 21 corresponding one-to-one with the plurality of fixing holes 13. When the second die head 2 covers the first die head 1, a plurality of fixing members 4 are respectively provided through the mounting holes 21 and connected to the fixing holes 13 to achieve the connection between the first die head 1 and the second die head 2. It can be understood that the connection between the first die head 1 and the second die head 2 via the plurality of fixing members 4 improves the stability of the connection between the first die head 1 and the second die head 2. At the same time, the location of the plurality of fixing holes 13 outside the groove 11 prevents the fixing members 4 from interfering with the circulation of the coating liquid, which is conducive to improving the uniformity of the coating.

[0034] For example, the fixing hole 13 is a threaded hole, the mounting hole 21 is a circular through hole, and the fixing member 4 is a bolt. When the fixing member 4 fixes the first die head 1 and the second die head 2, the threaded end of the bolt is directly placed in the circular through hole, and the bolt moves along the circular through hole and docks with the threaded hole. At this time, the threaded end of the bolt is screwed into the threaded hole. When the head of the bolt abuts against the second die head 2, the driving of the bolt is stopped.

[0035] Furthermore, the bottom wall of the groove 11 is inclined and extends to the first side 12 of the first die head 1. It can be understood that by tilting the bottom wall of the groove 11 and extending it to the first side 12 of the first die head 1. Exemplarily, the width of the slit 3 gradually decreases in the direction close to the opening of the slit 3, so as to facilitate improving the uniformity of coating.

[0036] Further, if Figure 3 As shown, the side of the coating liquid distribution chamber 5 close to the slit 3 and the bottom wall of the groove 11 adopt an arc transition. It can be understood that the coating liquid is located in the coating liquid distribution chamber 5, and the side of the coating liquid distribution chamber 5 close to the slit 3 and the bottom wall of the groove 11 adopt an arc transition. When the coating liquid flows from the coating liquid distribution chamber 5 to the slit 3, it passes through the position where the side of the coating liquid distribution chamber 5 close to the slit 3 contacts the bottom wall of the groove 11. The arc transition structure can guide the flow of the coating liquid, which is conducive to the smooth flow of the coating liquid, thereby improving the uniformity of the coating. For example, an arc structure 111 is provided between the side of the coating liquid distribution chamber 5 close to the slit 3 and the bottom wall of the groove 11.

[0037] Furthermore, the first die head 1 is provided with a liquid inlet channel 6 and a liquid outlet channel 7, each of which is connected to the coating liquid distribution chamber 5 at one end and to the outside at the other end. It is understood that the liquid inlet channel 6 and the liquid outlet channel 7 are provided in the first die head 1, and the coating liquid is delivered to and discharged from the coating liquid distribution chamber 5 through the liquid inlet channel 6 and the liquid outlet channel 7.

[0038] For example, Figure 2 As shown, before coating, the other end of the liquid outlet channel 7 is opened and the opening of the slit 3 is blocked. Then, the other end of the liquid inlet channel 6 is connected to the external liquid source, and the coating liquid is transported into the coating liquid distribution chamber 5 until the coating liquid is discharged from the other end of the liquid outlet channel 7. At this time, the coating liquid distribution chamber 5 and the slit 3 are both filled with coating liquid. The other end of the liquid outlet channel 7 is blocked, and then the opening of the slit 3 is opened to start coating. It can be understood that the liquid outlet channel 7 is used to detect whether the coating liquid distribution chamber 5 and the slit 3 are full of coating liquid, thereby avoiding uneven coating due to insufficient coating liquid in the coating liquid distribution chamber 5 and the slit 3 or the presence of air during coating.

[0039] Optionally, the liquid inlet channel 6 and the liquid outlet channel 7 are arranged at an angle, and the extension direction of the liquid outlet channel 7 is the same as the width direction of the first die head 1, such as Figure 2 As shown, the width direction of the first die head 1 is the second direction, the thickness direction of the first die head 1 is the first direction, and the groove is provided on a side surface of the first die head 1 in the first direction. It is understandable that the extension direction of the liquid outlet channel 7 is the same as the width direction of the first die head 1, and the other end of the liquid outlet channel 7 is connected to the outside world. When the coating liquid is discharged from the other end of the liquid outlet channel 7, it can ensure that the coating liquid distribution chamber 5 and the slit 3 are filled with coating liquid. The liquid inlet channel 6 and the liquid outlet channel 7 are arranged at an angle, which facilitates the arrangement of the liquid inlet channel 6 and the liquid outlet channel 7 on the first die head 1, and also enables the liquid inlet channel 6 and the coating liquid distribution chamber 5 to have a larger interface, which is beneficial to the flow of the coating liquid.

[0040] Alternatively, as Figure 2As shown, the connection position between the liquid outlet channel 7 and the coating liquid distribution chamber 5 is located on the side of the connection position between the liquid inlet channel 6 and the coating liquid distribution chamber 5 close to the second die head 2 in the second direction. It can be understood that the connection position between the liquid outlet channel 7 and the coating liquid distribution chamber 5 is located between the connection position between the liquid inlet channel 6 and the coating liquid distribution chamber 5 and the second die head 2, that is, the connection position between the liquid outlet channel 7 and the coating liquid distribution chamber 5 is different from the connection position between the liquid inlet channel 6 and the coating liquid distribution chamber 5, so as to avoid interference between the liquid outlet channel 7 and the liquid inlet channel 6, thereby avoiding the situation where the gas in the coating liquid distribution chamber 5 cannot be completely discharged from the liquid outlet channel 7 when the liquid inlet channel 6 transports the coating liquid to the coating liquid distribution chamber 5, thereby ensuring the coating effect.

[0041] Further, if Figure 1 As shown, the second die head 2 includes a second side surface 22, and the second side surface 22 is coplanar with the first side surface 12 in the first direction. It can be understood that the first side surface 12 and the second side surface 22 are coplanar in the first direction, that is, the first side surface 12 and the second side surface 22 are aligned in the first direction. When the first die head 1 and the second die head 2 are connected along the first direction, the first side surface 12 and the second side surface 22 are in an aligned state, and the opening of the formed slit 3 is in a flush state, which facilitates the connection between the opening of the slit 3 and the coated substrate 8 and avoids uneven openings that affect the uniformity of liquid discharge.

[0042] Furthermore, the first die head 1 and the second die head 2 are both made of anodized metal materials. It is understandable that when the first die head 1 and the second die head 2 are butted together, there will be parts that fit together. There is no oxygen between the parts that fit together, so they tend to adhere together more tightly. When it is necessary to separate the first die head 1 and the second die head 2, it may be difficult. Therefore, by making the first die head 1 and the second die head 2 of anodized metal materials, vacuum cold welding will not occur in the parts that fit together when the first die head 1 and the second die head 2 are butted together, thereby avoiding the difficulty in separating the first die head 1 and the second die head 2.

[0043] It should be noted that vacuum cold welding refers to the phenomenon in space where two clean metal surfaces come into contact under vacuum conditions, resulting in a tight bond between them due to the natural bonding between atoms. This phenomenon differs from welding on Earth because it does not require an external heat source, but instead relies on the natural bonding force between atoms. This is a prior art process and will not be further elaborated in this embodiment.

[0044] It should also be noted that the principle of anodization is an electrochemical oxidation process that forms an oxide film on the surface of a metal or alloy through the action of an applied current. During the anodization process, an oxide layer is formed on the surface of the metal or alloy by adding an electrolyte and applying an external voltage. This oxide layer can effectively increase the corrosion resistance of the metal or alloy. This is a prior art process and will not be further described in this embodiment.

[0045] Optionally, in this embodiment, the metal material is stainless steel. It is understood that stainless steel is a metal material with properties such as oxidation resistance and corrosion resistance. After anodizing, the stainless steel can further improve its corrosion resistance and surface aesthetics, thereby improving the surface properties of the first die head 1 and the second die head 2.

[0046] In this embodiment, when using the coating die, the first die 1 and the second die 2 are first docked, and then the first die 1 and the second die 2 are fixed by the fixing member 4. Then, the opening of the slit 3 is sealed, and the liquid inlet channel 6 and the liquid outlet channel 7 are opened. The coating liquid is transported from the liquid inlet channel 6 to the coating liquid distribution chamber 5 until the coating liquid is discharged from the other end of the liquid outlet channel 7. The other end of the liquid outlet channel 7 is sealed. At this time, the coating liquid distribution chamber 5 is filled with coating liquid.

[0047] Then, the blockage of the opening of the slit 3 is released, and the opening of the slit 3 is docked with the coating substrate 8 to start coating, and the coating liquid is continuously transported to the coating liquid distribution chamber 5, thereby forming a coating liquid bridge 9 on the surface of the coating substrate 8 to complete the coating of the coating substrate 8.

[0048] When the coating work is completed, the fixing of the first die head 1 and the second die head 2 by the fixing member 4 is released, and the first die head 1 and the second die head 2 can be directly flushed.

[0049] In the second aspect, this embodiment also provides a coating device, which includes the coating die head in the first aspect. The coating device does not need to be equipped with a gasket separately, thus avoiding frequent disassembly or replacement of the gasket, reducing the cost of use, saving disassembly time, and improving coating efficiency.

[0050] Obviously, the above-described embodiments of the present invention are merely examples for the purpose of clearly illustrating the present invention and are not intended to limit the manner in which the present invention is to be implemented. A person skilled in the art would be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is not necessary and impossible to enumerate all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the claims of the present invention.

Claims

1. A coating die head, characterized in that: include: A first die head (1), wherein the first die head (1) is an integrated structure; A second die head (2), the second die head (2) is an integrated structure and is docked with the first die head (1); A groove (11) is provided on the surface of the first die head (1) facing the second die head (2), a coating liquid distribution cavity (5) is provided on the bottom wall of the groove (11), the groove (11) extends to the first side surface (12) of the first die head (1), and the surface of the second die head (2) facing the first die head (1) covers the groove (11) and cooperates with the groove (11) to form a slit (3).

2. The coating die head according to claim 1, characterized in that The bottom wall of the groove (11) is inclined and extends to the first side surface (12) of the first die head (1).

3. The coating die head according to claim 2, characterized in that A side of the coating liquid distribution cavity (5) close to the slit (3) and the bottom wall of the groove (11) adopt an arc transition.

4. The coating die head according to claim 1, characterized in that A liquid inlet channel (6) and a liquid outlet channel (7) are also provided in the first die head (1); one end of each of the liquid inlet channel (6) and the liquid outlet channel (7) is connected to the coating liquid distribution chamber (5), and the other end is connected to the outside world.

5. The coating die head according to claim 4, characterized in that The liquid inlet channel (6) and the liquid outlet channel (7) are arranged at an angle, and the extension direction of the liquid outlet channel (7) is the same as the width direction of the first die head (1).

6. The coating die head according to claim 5, characterized in that The connection position between the liquid outlet channel (7) and the coating liquid distribution chamber (5) is located on the side of the connection position between the liquid inlet channel (6) and the coating liquid distribution chamber (5) close to the second die head (2) in the second direction.

7. The coating die according to any one of claims 1 to 6, characterized in that: The first die head (1) is provided with a plurality of fixing holes (13) at intervals outside the groove (11), and the second die head (2) is provided with a plurality of mounting holes (21) corresponding one-to-one to the plurality of fixing holes (13). When the second die head (2) covers the first die head (1), a plurality of fixing members (4) are passed through the mounting holes (21) in a one-to-one manner and connected to the fixing holes (13).

8. The coating die according to any one of claims 1 to 6, characterized in that: The second die head (2) includes a second side surface (22), and the second side surface (22) is coplanar with the first side surface (12) in a first direction.

9. The coating die according to any one of claims 1 to 6, characterized in that: The first die head (1) and the second die head (2) are both made of anodized metal materials.

10. A coating device, characterized in that The coating die comprises the coating die according to any one of claims 1 to 9.

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