Coating die head and coating device

Abstract

The utility model belongs to the technical field of coating equipment, and discloses a coating die head and a coating device. The coating device comprises a coating die head, the coating die head comprises a die head main body, at least one liquid storage cavity and a coating channel are arranged in the die head main body, the liquid storage cavity is communicated with the coating channel, and the coating channel is used for discharging coating liquid; the magnetic device is connected with the die head main body; the magneton is arranged in the liquid storage cavity, and the magnetic device can drive the magneton to rotate so as to stir the coating liquid in the liquid storage cavity. And standing layering of the coating liquid is avoided, so that uniform coating of the coating liquid can be achieved, it is guaranteed that the coating performance of the coating liquid at different positions of the base material is the same, and the coating process is more reliable.

Description

Technical Field

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

[0002] Coating involves applying one or more layers of a coating solution to a substrate, typically a flexible film or backing paper. The applied coating is then oven-dried or cured to form a layer with specialized functions. Coating processes are widely used in semiconductor devices, displays, lighting, power supplies, sensors, and other fields.

[0003] The coating process is typically completed using coating equipment, and the coating die is the core component of the coating equipment, used to control the flow and distribution of the coating liquid to form the desired coating pattern and film thickness. Therefore, the coating die has a significant impact on the coating quality. Currently, in preparation for coating, workers need to first stir the coating liquid evenly and place it in the coating die before coating. Coating liquids with poor stability will stratify while standing in the coating die, affecting the coating effect. This can lead to different properties at different locations on the substrate after coating, seriously affecting the coating film quality.

[0004] Therefore, there is an urgent need for a coating die and a coating device to solve the above problems. Utility Model Content

[0005] One purpose of the utility model is to provide a coating die head, which can achieve uniform coating of the coating liquid, ensure that the coating properties of the coating liquid at different positions on the substrate are the same, and make the coating process more reliable.

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

[0007] A coating die head, which includes: a die head body, in which at least one liquid storage chamber and a coating channel are provided, the liquid storage chamber is connected to the coating channel, and the coating channel is used to discharge the coating liquid; a magnetic device, connected to the die head body; a magnet, arranged in the liquid storage chamber, and the magnetic device can drive the magnet to rotate to stir the coating liquid in the liquid storage chamber.

[0008] Preferably, a groove is provided on the die body, and the magnetic device is embedded in the groove.

[0009] Preferably, the coating channel is arranged below a plurality of the liquid storage chambers, and the magnetic device is located above the liquid storage chambers.

[0010] Preferably, an air hole is further provided on the die body, one end of the air hole is communicated with the liquid storage cavity, and the other end of the air hole is configured to be connected to a pressure regulating mechanism capable of regulating the internal pressure of the liquid storage cavity.

[0011] Preferably, a communication cavity is further provided in the die body, the air hole is communicated with the communication cavity, and the plurality of liquid storage cavities are all communicated with the communication cavity.

[0012] Preferably, the die body is further provided with a liquid inlet hole, which is communicated with the liquid storage cavity and is configured to introduce the coating liquid into the liquid storage cavity.

[0013] Preferably, the coating die head further comprises a first sealing plug, which is detachably connected to the liquid inlet.

[0014] Preferably, the lower end of the die body includes: an avoidance portion, on which the outlet of the coating channel is opened; and an abutment portion, which is arranged on both sides of the avoidance portion and is configured to abut against the substrate to be coated, and the lower surface of the abutment portion is lower than the lower surface of the avoidance portion.

[0015] Another object of the present invention is to provide a coating device that, by adopting the above-mentioned coating die head, can ensure that the coating properties of the coating liquid at different positions on the substrate are the same, making the coating process more reliable.

[0016] To achieve this purpose, the present invention adopts the following technical solutions:

[0017] A coating device comprises a coating support and a coating die head. The coating support can drive the coating die head to move.

[0018] Preferably, the coating device includes at least two coating dies.

[0019] Beneficial effects:

[0020] The utility model provides a coating die head, wherein the coating liquid in the liquid storage chamber can be discharged through the coating channel and coated on the substrate; during the coating process, the magnetic device can drive the magnet to rotate to stir the coating liquid in the liquid storage chamber, thereby preventing the coating liquid from being stratified when standing, thereby achieving uniform coating of the coating liquid, ensuring that the coating performance of the coating liquid at different positions on the substrate is the same, and making the coating process more reliable.

[0021] The coating device of the present invention, by adopting the above-mentioned coating die head, can ensure that the coating properties of the coating liquid at different positions of the substrate are the same, making the coating process more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 2 This is a side view of a coating die head provided by an embodiment of the present utility model;

[0024] Figure 3This is a perspective isometric view of a coating die head provided by an embodiment of the present utility model;

[0025] Figure 4 This is a perspective front view of a coating die head provided by an embodiment of the present utility model;

[0026] Figure 5 This is a perspective top view of a coating die head provided by an embodiment of the present utility model;

[0027] Figure 6 This is a front view of a coating die head provided by an embodiment of the present utility model;

[0028] Figure 7 It is a perspective side view of a coating die head provided by an embodiment of the present utility model.

[0029] In the picture:

[0030] 1. Die head body; 2. Magnetic device; 3. Magnetic element;

[0031] 11. Communication cavity; 12. Liquid storage cavity; 13. Coating channel; 131. Liquid outlet;

[0032] 14. Air hole; 15. Liquid inlet hole; 16. Fixing hole; 17. Avoidance portion; 18. Abutment portion. DETAILED DESCRIPTION

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] This embodiment provides a coating die and a coating device. The coating device includes a coating bracket and a coating die. The coating die is installed on the coating bracket. The coating die can store and discharge the coating liquid in a timely manner. The coating bracket can drive the coating die to move along a preset trajectory, thereby coating the coating liquid on the substrate.

[0038] In some embodiments, the coating apparatus includes at least two coating dies. When the coating apparatus is operating, the at least two coating dies can simultaneously perform coating operations, which not only improves coating efficiency but also enables coating of different areas, patterns, and properties, thereby enabling the coating of complex patterns. It is understood that the arrangement of the at least two coating dies can be flexibly configured and is not specifically limited herein.

[0039] like Figure 1-Figure 3 As shown, the coating die includes a die body 1, a magnetic device 2 and a magnet 3. A connecting cavity 11, a plurality of liquid storage cavities 12 and a coating channel 13 are provided inside the die body 1. The liquid storage cavity 12 is used to store the coating liquid, and the plurality of liquid storage cavities 12 are connected to one end of the coating channel 13. The other end of the coating channel 13 is connected to the outside of the die body 1 to discharge the coating liquid. The magnetic device 2 is connected to the die body 1. The magnet 3 is provided in the liquid storage cavity 12, and the magnetic device 2 can drive the magnet 3 to rotate to stir the coating liquid in the liquid storage cavity 12 to avoid the coating liquid in the liquid storage cavity 12 from being statically stratified, thereby achieving uniform coating of the coating liquid, ensuring that the coating performance of the coating liquid at different positions on the substrate is the same, and making the coating process more reliable.

[0040] In this embodiment, the die body 1 includes a first die and a second die (not shown in the figure). The first die is provided with a first trough body and a plurality of second trough bodies, and the second die is provided with a third trough body and a plurality of fourth trough bodies. The first die and the second die are symmetrical and interlocked. In this case, the first trough body and the second trough body are arranged to form a coating channel 13, and each third trough body and a corresponding fourth trough body are arranged to form a liquid storage chamber 12. By configuring the die body 1 as two parts, the processing difficulty can be reduced.

[0041] The die body 1 is provided with a fixing hole 16, which is internally threaded. After the fastener passes through the coating bracket, it is connected to the thread in the fixing hole 16, thereby fixing the coating die as a whole to the coater bracket. In this embodiment, the die body 1 is provided with fixing holes 16 on both sides, and two fixing holes 16 are provided on each side. In some embodiments, the number of fixing holes 16 on each side of the die body 1 can be flexibly set. In some embodiments, the fixing holes 16 can also be opened at the top of the die body 1 or other locations, which are not specifically limited here.

[0042] like Figure 3-Figure 5 As shown, a groove is provided on the die body 1, and the magnetic device 2 is placed in the groove of the die body 1, so that the overall structure of the coating die is compact; in addition, the die body 1 can protect the magnetic device 2 to prevent dust or coating liquid from entering the magnetic device 2, thereby ensuring the performance of the magnetic device 2.

[0043] In this embodiment, a groove is provided at the top of the die body 1, a plurality of liquid storage chambers 12 are provided below the groove, and a coating channel 13 is provided below the liquid storage chamber 12. This facilitates the discharge of the coating liquid from the liquid outlet 131 at the lower end of the coating channel 13 under the action of gravity and the pressure within the liquid storage chamber 12. Positioning the magnetic device 2 above the liquid storage chamber 12 does not interfere with the discharge of the coating liquid.

[0044] Specifically, along the up and down directions, the cross-sections at various positions of the coating channel 13 have the same shape and size, thereby ensuring the stability of the outflow of the coating liquid.

[0045] Optionally, in this embodiment, three liquid storage chambers 12 are provided within the die body 1. In some embodiments, the number of liquid storage chambers 12 may be one, two, or more, without specific limitation. In this embodiment, the three liquid storage chambers 12 are arranged in a straight line. In some embodiments, the three liquid storage chambers 12 may also be arranged in a triangular shape.

[0046] In this embodiment, the liquid storage cavity 12 is a cylindrical cavity, and the inner surface of the cylindrical cavity has no ridges, so it is not easy to cause the deposition and retention of the coating liquid. In other embodiments, the liquid storage cavity 12 can also be processed into a cavity of other shapes such as a rectangular cavity.

[0047] In this embodiment, a magnet 3 is placed in each liquid storage cavity 12, thereby ensuring that the coating liquid in each liquid storage cavity 12 can be stirred. In other embodiments, the number of magnets 3 in each liquid storage cavity 12 can also be flexibly set according to needs.

[0048] A magnetic stirrer is a mature, existing technology that includes a base and a magnet. In actual use, the magnet is placed in a container containing the liquid to be stirred, and the container is placed on the base of the magnetic stirrer. When the magnetic stirrer is powered on, a rotating magnetic field is generated near the base, driving the magnet in a circular motion. This in turn forms a vortex within the liquid in the container, achieving the desired effect of stirring the liquid. In this embodiment, the magnetic device 2 is an inverted base, and the magnet 3 is placed in the liquid storage chamber 12. When the magnetic device 2 is powered on, it drives the magnet 3 in the lower liquid storage chamber 12 in a circular motion.

[0049] Specifically, the magnetic device 2 is provided with a power supply, making it easier for technicians to operate. It is understood that the magnetic device 2 can control the rotation speed of the magnet 3 according to the different coating liquid materials, and further control the speed of stirring the coating liquid, so that different coating liquids are stirred evenly, ensuring that the coating properties of the coating liquid at different positions on the substrate coated by the same coating die are the same.

[0050] like Figure 3 and Figure 4 As shown, a liquid inlet hole 15 is provided on the die body 1, one end of the liquid inlet hole 15 is connected to the liquid storage chamber 12, and the other end of the liquid inlet hole 15 is connected to the outside. The liquid inlet hole 15 is configured to pass the coating liquid into the liquid storage chamber 12. In some embodiments, a liquid inlet hole 15 is provided on the die body 1, and each liquid storage chamber 12 is connected by a connecting hole. After the coating liquid enters the liquid storage chamber 12 connected to it through the liquid inlet hole 15, it flows into other liquid storage chambers 12 through the connecting hole. Such a configuration can ensure that the coating liquid depth in each liquid storage chamber 12 is the same. In some embodiments, a plurality of liquid inlet holes 15 are provided on the die body 1, each liquid inlet hole 15 correspondingly communicates with a liquid storage chamber 12, and passes the coating liquid into the corresponding liquid storage chamber 12.

[0051] In this embodiment, the coating die also includes a first sealing plug, which is detachably connected to the liquid inlet 15. Optionally, a first thread is provided inside the liquid inlet 15, and the first sealing plug can be screwed with the first thread and seal the liquid inlet 15 to achieve sealing of the die body 1. Specifically, the first sealing plug can be a component capable of sealing and blocking the device, such as a bolt, a latch or a rubber plug. After the coating liquid is introduced, when the coating die is not in use, external impurities can be prevented from entering the liquid storage chamber 12 by sealing the liquid inlet 15 with the first sealing plug.

[0052] In order to control the coating liquid in the liquid storage chamber 12 to be discharged from the coating channel 13, as shown in FIG. Figure 3and Figure 4 As shown, an air hole 14 is provided on the die body 1, and the height of the air hole 14 is higher than the height of the liquid inlet hole 15. One end of the air hole 14 is connected to the liquid storage chamber 12, and the other end of the air hole 14 is connected to an external pressure regulating mechanism, which can regulate the pressure inside the liquid storage chamber 12. Specifically, when the pressure regulating mechanism controls the liquid storage chamber 12 to be positive pressure, the coating liquid in the liquid storage chamber 12 is discharged from the coating channel 13 under the action of pressure; when the pressure regulating mechanism controls the liquid storage chamber 12 to be negative pressure, the coating liquid in the liquid storage chamber 12 stops being discharged. It can be understood that, without violating the concept of the present invention, the pressure regulating mechanism can be any one of the existing technologies.

[0053] In order to achieve that each liquid storage cavity 12 is connected to the air hole 14, Figure 3 and Figure 4 As shown, a connecting cavity 11 is further provided in the die body 1, and the connecting cavity 11 is arranged below the magnetic device 2 and above the liquid storage cavity 12. The air holes 14 and each liquid storage cavity 12 are connected to the connecting cavity 11. In this embodiment, the connecting cavity 11 is a rectangular cavity, and the air holes 14 are arranged on the side of the die body 1 and are connected to the side wall of the connecting cavity 11. In some embodiments, the air holes 14 are arranged above the die body 1 and are connected to the top inner wall of the connecting cavity 11. In some embodiments, the connecting cavity 11 includes a main pipeline and a plurality of branch pipelines connected to the main pipeline. The main pipeline is arranged in the connecting cavity 11, and the branch pipelines are connected to the liquid storage cavity 12.

[0054] In this embodiment, the coating die head further includes a second sealing plug, which is detachably connected to the air hole 14. Optionally, a second thread is provided inside the air hole 14, and the second sealing plug can be screwed with the second thread and seal the air hole 14 to achieve sealing of the die head body 1. Specifically, the second sealing plug can be a component capable of sealing and blocking the device, such as a bolt, a latch, or a rubber plug. When the coating die head is not in use, the second sealing plug can prevent external impurities from entering the liquid storage chamber 12 by blocking the air hole 14.

[0055] like Figure 6 As shown, the lower end of the die body 1 is provided with an escape portion 17 and an abutment portion 18. Specifically, the liquid outlet 131 of the coating channel 13 is provided on the escape portion 17, and the abutment portions 18 are provided on both sides of the escape portion 17. The abutment portions 18 are used to abut against the substrate to be coated. The lower surface of the abutment portion 18 is lower than the lower surface of the escape portion 17. This allows a certain gap to be formed between the liquid outlet 131 of the coating channel 13 and the substrate to be coated. The height of this gap is the thickness of the coating liquid to be applied. Optionally, the height of this gap can be 1-500 microns.

[0056] In summary, if Figure 7As shown, the working process of the coating device generally includes:

[0057] Fix the required coating die head to the coater bracket;

[0058] Remove the second sealing plug that blocks the air hole 14 and connect the external pressure regulating mechanism to the air hole 14. The pressure regulating mechanism controls the liquid storage chamber 12 to maintain a certain negative pressure to ensure that the coating liquid does not flow out of the coating channel 13.

[0059] The coating liquid is introduced into each liquid storage cavity 12 through the liquid inlet hole 15 of the die body 1. After the coating liquid is introduced, the liquid inlet hole 15 is blocked by the first sealing plug;

[0060] Turn on the power of the magnetic device 2, and the magnetic element 3 in the liquid storage chamber 12 performs a circular motion to stir the coating liquid evenly;

[0061] When coating is required, the lower end of the die body 1 contacts the substrate, and the applicator bracket drives the die body 1 to move along a preset path. At the same time, the pressure regulating mechanism adjusts the pressure in the liquid storage chamber 12 to a positive pressure, and the coating liquid flows out from the liquid outlet 131 to be evenly coated on the substrate to be coated;

[0062] After the coating process is completed, the pressure regulating mechanism adjusts the pressure in the liquid storage chamber 12 to a negative pressure.

[0063] Compared with the prior art, the coating die head of the present invention has the following beneficial effects: the magnetic device 2 drives the magnet 3 in the liquid storage chamber 12 to rotate, further stirring the coating liquid evenly, preventing the coating liquid from settling in the liquid storage chamber 12, and avoiding the coating liquid from being stratified when standing, thereby achieving uniform coating of the coating liquid, ensuring that the coating performance of the coating liquid at different positions on the substrate is the same, so as to achieve the purpose of improving the coating quality and making the coating process more reliable.

[0064] 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 die body (1) is provided with at least one liquid storage cavity (12) and a coating channel (13), wherein the liquid storage cavity (12) is communicated with the coating channel (13), and the coating channel (13) is used to discharge the coating liquid; A magnetic device (2) connected to the die body (1); The magnet (3) is arranged in the liquid storage chamber (12), and the magnetic device (2) can drive the magnet (3) to rotate to stir the coating liquid in the liquid storage chamber (12).

2. The coating die head according to claim 1, characterized in that The die head body (1) is provided with a groove, and the magnetic device (2) is embedded in the groove.

3. The coating die head according to claim 1, characterized in that The coating channel (13) is arranged below the plurality of liquid storage chambers (12), and the magnetic device (2) is located above the liquid storage chambers (12).

4. The coating die according to any one of claims 1 to 3, characterized in that: The die body (1) is further provided with an air hole (14), one end of which is connected to the liquid storage chamber (12), and the other end of which is configured to be connected to a pressure regulating mechanism capable of regulating the internal pressure of the liquid storage chamber (12).

5. The coating die head according to claim 4, characterized in that A communication cavity (11) is further provided in the die body (1), the air hole (14) is communicated with the communication cavity (11), and the plurality of liquid storage cavities (12) are all communicated with the communication cavity (11).

6. The coating die according to any one of claims 1 to 3, characterized in that: The die body (1) is further provided with a liquid inlet (15), the liquid inlet (15) being in communication with the liquid storage cavity (12), and the liquid inlet (15) being configured to allow the coating liquid to flow into the liquid storage cavity (12).

7. The coating die head according to claim 6, characterized in that The coating die head further comprises a first sealing plug, which is detachably connected to the liquid inlet hole (15).

8. The coating die according to any one of claims 1 to 3, characterized in that: The lower end of the die body (1) comprises: an avoidance portion (17), wherein the outlet of the coating channel (13) is opened on the avoidance portion (17); The abutting portion (18) is provided on both sides of the avoidance portion (17) and is configured to abut against the substrate to be coated, and the lower surface of the abutting portion (18) is lower than the lower surface of the avoidance portion (17).

9. A coating device, characterized in that: The coating die comprises a coating support and the coating die according to any one of claims 1 to 8, wherein the coating support can drive the coating die to move.

10. The coating device according to claim 9, characterized in that The coating device includes at least two coating dies.

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