Coating die head cleaning mechanism and coating equipment using same

Abstract

The utility model discloses a coating die head cleaning mechanism and coating equipment using the coating die head cleaning mechanism. The coating die head cleaning mechanism comprises an air knife main body part, the soaking tank is arranged on the air knife main body part and extends along the length direction of the air knife main body part; the soaking tank is provided with a sunken tank body exhaust cavity assembly used for containing washing liquid for cleaning the coating die head, and the tank body exhaust cavity assembly comprises a pair of lateral exhaust cavities distributed on the two sides of the soaking tank in the length direction; air exhausted by the pair of lateral exhaust cavities faces the soaking tank; each lateral exhaust cavity is of an integrated cavity structure or a multi-section type sub-cavity structure arranged in a sectioned mode. And after the coating die head is cleaned by the washing liquid in the soaking tank, the washing liquid attached to the surface of the coating die head is blow-dried by the pair of lateral exhaust cavities. According to the coating die head cleaning device, the cleaning effect on the coating die head is enhanced by combining two modes of washing liquid soaking and air blowing.

Description

Technical Field

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

[0002] Perovskite battery liquid medicine will remain on the coating die head. If the liquid medicine remaining on the coating die head is not processed, it will seriously affect the coating efficiency of the perovskite battery and greatly reduce the quality of the perovskite battery sheet. In the existing perovskite slit coater, in order to process the liquid medicine remaining on the coating die head, a blowing device is usually arranged near the coating die head, and the wind blown by the blower is used to process the liquid medicine remaining on the coating die head. Although this method can process the liquid medicine on the coating die head, there are still defects.

[0003] First, the liquid medicine remaining on the coating die head is blown onto other parts of the coater, increasing the cleaning difficulty of other parts of the coater.

[0004] Secondly, it is difficult to ensure the thoroughness of cleaning only by blowing for the parts on the coating die head that are prone to dirt accumulation.

[0005] Therefore, aiming at the problems existing in the cleaning process of the coating die head of the existing coater, it is necessary to further improve the overall structure of the cleaning mechanism corresponding to the coating die head from the perspective of improving the thoroughness of cleaning and avoiding the pollution of other parts of the coating equipment during the cleaning process. Summary of the Utility Model

[0006] The first object of the utility model is to provide a coating die head cleaning mechanism to solve the technical problem of improving the thoroughness of cleaning the coating die head.

[0007] The second object of the utility model is to provide a coating equipment to solve the technical problem of preventing the coating die head of the coating equipment from polluting other parts during the cleaning process.

[0008] The coating die head cleaning mechanism of the utility model is realized as follows:

[0009] A coating die head cleaning mechanism includes:

[0010] An air knife main body part;

[0011] An immersion tank, which is arranged on the air knife main body part and extends along the length direction of the air knife main body part; the immersion tank has a concave tank body for accommodating the cleaning liquid for the coating die head;

[0012] An exhaust cavity assembly, which includes a pair of lateral exhaust cavities distributed on both sides in the length direction of the soaking tank; the air discharged from the pair of lateral exhaust cavities is all directed towards the soaking tank; each of the lateral exhaust cavities adopts an integral cavity structure or a multi-section sub-cavity structure arranged in segments;

[0013] When the coating die head is cleaned of the cleaning liquid in the soaking tank, the cleaning liquid attached to the surface of the coating die head is dried by a pair of lateral exhaust cavities.

[0014] In an optional implementation case of the present utility model, the depression depth of the soaking tank on the air knife main body part gradually becomes smaller from the middle in the length direction to both sides.

[0015] In an optional implementation case of the present utility model, the air knife main body part includes an air knife base and a pair of air knife top plates for cooperating to form a pair of lateral exhaust cavities; and

[0016] A pair of the air knife top plates and the air knife base also sandwich a slit gasket for forming an air outlet.

[0017] In an optional implementation case of the present utility model, the slit gasket at least includes a strip-shaped gasket main body for covering one side of the air knife base that is opposite to the soaking tank in the lateral exhaust cavity.

[0018] In an optional implementation case of the present utility model, the slit gasket also includes a pair of extension pieces for covering both width direction ends of the air knife base in the lateral exhaust cavity; and

[0019] The pair of extension pieces are connected to the strip-shaped gasket main body.

[0020] In an optional implementation case of the present utility model, the cross-section of the soaking tank in the width direction is V-shaped, and the included angle range of the V-shape is 130° to 150°.

[0021] In an optional implementation case of the present utility model, the side end faces of the pair of air knife top plates facing each other both extend to the side edges in the length direction of the soaking tank.

[0022] In an optional implementation case of the present utility model, the side end faces of each of the air knife top plates facing each other are both inclined mating faces coplanar with the side tank walls in the length direction of the soaking tank.

[0023] In an optional implementation case of the present utility model, liquid inlet grooves communicating with the soaking tank are respectively provided at the side ends of the air knife main body part in the width direction of the soaking tank; and

[0024] The liquid inlet grooves are configured with liquid inlets for introducing cleaning liquid into the liquid inlet grooves; and splash-proof plates for preventing the cleaning liquid from splashing from the liquid inlets are also provided in the liquid inlet grooves.

[0025] The coating equipment of the present utility model is realized as follows:

[0026] A coating equipment, at least comprising: a coating die head and the coating die head cleaning mechanism.

[0027] By adopting the above technical solution, the present utility model has the following beneficial effects: The coating die head cleaning mechanism of the present utility model and the coating equipment using the same realize the immersion cleaning of the coating die head through the cleaning liquid in the immersion tank provided on the air knife main body. After the cleaning of the coating die head is completed, the cleaning liquid attached to the surface of the coating die head is dried by a pair of lateral exhaust cavities. In this process, the surface of the coating die head to be cleaned is inserted into the immersion tank to complete the cleaning, and the stains generated during the cleaning process will not splash onto other parts of the coating equipment. In this way, the cleaning effect of the coating die head is strengthened by combining the two methods of cleaning liquid immersion and air blowing. Description of the Drawings

[0028] Figure 1 is the first perspective exploded structural schematic diagram of the coating die head cleaning mechanism of the embodiment of the present application;

[0029] Figure 2 is the second perspective exploded structural schematic diagram of the coating die head cleaning mechanism of the embodiment of the present application;

[0030] Figure 3 is the partial structural schematic of the coating die head cleaning mechanism of the embodiment of the present application Figure 1 ;

[0031] Figure 4 is the partial structural schematic of the coating die head cleaning mechanism of the embodiment of the present application Figure 2 .

[0032] In the figure: air knife main body 1, air knife base 11, air knife top plate 12, strip-shaped gasket main body 13, extension piece 14, inclined mating surface 15, immersion tank 21, liquid inlet tank 22, liquid inlet nozzle 23, liquid discharge nozzle 24, splash guard 25, cleaning liquid overflow port 26, lateral exhaust cavity 3, coating die head 5, non-contact liquid level sensor 6. Detailed Embodiments

[0033] In order to make the content of the present utility model easier to be clearly understood, the present utility model will be further described in detail below according to specific embodiments and in conjunction with the drawings.

[0034] Embodiment 1: Please refer to Figures 1 to 4 As shown, this embodiment provides a coating die head cleaning mechanism, comprising: an air knife main body, and an immersion tank 21 and an exhaust cavity assembly provided on the air knife main body.

[0035] Specifically, in combination with the situation that the air knife main body is generally used more frequently, this embodiment takes the air knife main body as an example and adopts a standard rectangular parallelepiped structure, that is, the air knife main body has three different directional dimensions of length, width and height at the same time.

[0036] Furthermore, let's first talk about the soaking tank 21 in this embodiment:

[0037] First, the immersion tank 21 extends along the length direction of the air knife main body; the immersion tank 21 has a concave tank body for accommodating the washing liquid for cleaning the coating die head 5.

[0038] Secondly, the integral immersion tank 21 is arranged on the air knife body in the middle of the width direction of the air knife body. Under this layout, symmetrical spaces are reserved on the air knife body and at the two side ends of the immersion tank 21 in the length direction.

[0039] Based on the above situation, it should be noted that the depth of the depression of the immersion tank 21 on the air knife body gradually decreases from the middle of its length direction to both sides. That is to say, for the washing liquid contained in the immersion tank 21, the capacity of the washing liquid contained in the middle of the length direction of the immersion tank 21 is the largest, and then the capacity of the washing liquid gradually decreases from the middle to both ends. The significance of such a design is to prevent the washing liquid from overflowing when the coating die head 5 enters the immersion tank 21.

[0040] In addition, the present embodiment also has the following designs:

[0041] For example, in an optional case, the cross section of the soaking tank 21 along the width direction is V-shaped, and the angle range of the V-shape is 130° to 150°. Under this structural design, on the one hand, based on the inconvenience of the width of the soaking tank 21, the V-shaped structure can make the best use of the depth space of the soaking tank 21, thereby increasing the capacity of the washing liquid that can be accommodated in the soaking tank 21.

[0042] In order to meet the requirements of the delivery and discharge of the absorbed liquid in the immersion tank 21, the present embodiment is also designed as follows: the side ends of the air knife body in the width direction of the immersion tank 21 are respectively provided with liquid inlet grooves 22 connected to the immersion tank 21; and the liquid inlet groove 22 is provided with a liquid inlet port for introducing washing liquid into the liquid inlet groove 22; of course, the air knife body is also provided with a liquid discharge port connected to the liquid inlet groove 22 for discharging the washing liquid in the immersion tank 21. The liquid inlet port is provided with a liquid inlet nozzle 23, and the liquid discharge port is provided with a liquid discharge nozzle 24.

[0043] Based on the above structure, since the liquid inlet tank 22 is located at the side end in the width direction of the immersion tank 21, as the cleaning liquid needs to flow horizontally between the liquid inlet tank 22 and the immersion tank 21, in order to prevent the cleaning liquid from splashing under the liquid injection pressure at the liquid inlet, a splash-proof plate 25 for preventing the cleaning liquid from splashing from the liquid inlet is also provided in the liquid inlet tank 22.

[0044] In addition, to prevent the coating die head 5 from entering the immersion tank 21, which may cause the problem that the cleaning liquid in the immersion tank 21 overflows into the immersion tank 21 due to inaccurate control of the amount of cleaning liquid in the early stage. At this time, a cleaning liquid overflow port 26 is formed at one side end of the liquid inlet tank 22. It should be noted that the horizontal plane of the cleaning liquid overflow port 26 is higher than the lowest point of the end of the immersion tank 21 communicating with the liquid inlet tank 22. Such a design is to ensure that when the cleaning liquid needs to be introduced into the immersion tank 21, the cleaning liquid will not directly flow out from the cleaning liquid overflow port 26. In this regard, in an optional implementation case, in order to accurately control the volume of the cleaning liquid introduced into the immersion tank 21, a non-contact liquid level sensor 6 can also be provided on the air knife main body to detect the liquid level in the liquid inlet tank 22.

[0045] Next, the exhaust cavity assembly will be described: The exhaust cavity assembly includes a pair of lateral exhaust cavities 3 distributed on both sides in the length direction of the immersion tank 21; the air discharged from the pair of lateral exhaust cavities 3 is all directed towards the immersion tank 21; based on this situation, when the coating die head 5 is cleaned with the cleaning liquid in the immersion tank 21, the cleaning liquid attached to the surface of the coating die head 5 is dried by the pair of lateral exhaust cavities 3.

[0046] It should be noted that each lateral exhaust cavity 3 adopts an integral cavity structure or a multi-section split cavity structure arranged in sections. Here, the multi-section refers to at least two sections, such as a four-section split cavity structure, that is, it has four split cavities arranged along the length direction of the immersion tank 21. When the integral cavity structure is adopted here, for a coating die head 5 with a length of, for example, two meters, there may be a problem of poor drying effect. By adopting the multi-section split cavity structure, the effect of more concentrated air blowing can be achieved, and the lateral exhaust cavities 3 with the multi-section split cavity structure can be used in a step-by-step manner. For example, for a four-cavity structure, the two middle split cavities can be operated first, and then the split cavities at both ends can be operated. The above situations all meet the usage requirements of this embodiment, and this embodiment does not make an absolute limitation in this regard.

[0047] In addition, in order to make the air outlet of the lateral exhaust cavity 3 in this embodiment face the coating die head 5 inserted into the immersion tank 21, the following design is also made in this embodiment:

[0048] First, the main body of the air knife includes an air knife base 11 and a pair of air knife top plates 12 for cooperatively forming a pair of lateral exhaust cavities 3; and a slit gasket for forming an air outlet is clamped between the pair of air knife top plates 12 and the air knife base 11. That is to say, the air outlet direction of the lateral exhaust cavity 3 is defined by the slit gasket here.

[0049] Second, the slit gasket at least includes a strip-shaped gasket body 13 for covering one side of the air knife base 11 that is opposite to the immersion tank 21 in the lateral exhaust cavity 3.

[0050] Furthermore, the slit gasket also includes a pair of extension pieces 14 for covering both widthwise ends of the air knife base 11 in the lateral exhaust cavity 3; and the pair of extension pieces 14 are connected to the strip-shaped gasket body 13. The pair of extension pieces 14 here are mainly used to prevent the wind blown out from the lateral exhaust cavity 3 from drifting in its width direction.

[0051] In addition, in order to make the wind blown out from the lateral exhaust cavity 3 enter the immersion tank 21 as much as possible, the opposite side end faces of the pair of air knife top plates 12 both extend to the side edges in the length direction of the immersion tank 21. Each opposite side end face of the air knife top plate 12 is an inclined mating surface 15 coplanar with the side tank wall in the length direction of the immersion tank 21. In such a structure, a slit-shaped air outlet is formed between the side edge of the air knife top plate and the side tank wall of the immersion tank 21, and the wind blown out from the lateral exhaust cavity 3 can only drift towards the immersion tank 21 under the cooperation of the air knife top plate and the air knife base 11.

[0052] In summary, for the coating die head cleaning mechanism of this embodiment, the cleaning effect on the coating die head 5 is enhanced by combining the two methods of washing liquid immersion and air blowing.

[0053] Embodiment 2: Please refer to Figures 1 to 4 As shown, on the basis of the coating die head cleaning mechanism of Embodiment 1, this embodiment provides a coating device, which at least includes: a coating die head 5 and the coating die head cleaning mechanism of Embodiment 1.

[0054] It should be noted that when the coating die head 5 of the coating device needs to be cleaned, first, a sufficient amount of washing liquid is introduced into the immersion tank 21, and then the coating die head 5 moves downward relative to the main body of the air knife until the part to be cleaned on the coating die head 5 sinks into the immersion tank 21. In this way, the outer surface of the coating die head 5 is immersed by the washing liquid in the immersion tank 21. After soaking for a certain time, the washing liquid in the immersion tank 21 is discharged. At this time, there is still some washing liquid adhering to the outer surface of the coating die head 5. The lateral exhaust cavity is started, so that the wind discharged from the lateral exhaust cavity directly blows to the outer surface of the coating die head 5 until the outer surface of the coating die head 5 is dried.

[0055] In the above specific embodiments, the objectives, technical solutions, and beneficial effects of the present utility model have been further described in detail. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

[0056] In the description of the present utility model, it should be understood that the terms indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0057] In the present utility model, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected to", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0058] In the description of the present utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of this utility model is usually placed during use. These are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0059] In addition, the terms "horizontal", "vertical", "hanging", etc. do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only 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 inclined.

[0060] In the present utility model, unless otherwise clearly defined and limited, the first feature being above or below the second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but in contact through additional features therebetween. Moreover, the first feature being above, on top of, and over the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being below, beneath, and under the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

Claims

1. A coating die cleaning mechanism, characterized in that, Comprising: An air knife main body; An immersion tank, which is arranged on the air knife main body and extends along the length direction of the air knife main body; The immersion tank has a concave tank body for accommodating the cleaning liquid of the coating die head; An exhaust cavity assembly, which includes a pair of lateral exhaust cavities distributed on both sides of the immersion tank in the length direction; the air discharged from the pair of lateral exhaust cavities is all directed towards the immersion tank; each of the lateral exhaust cavities adopts an integral cavity structure or a multi-segment split cavity structure arranged in segments; When the coating die head finishes cleaning the cleaning liquid in the immersion tank, the cleaning liquid attached to the surface of the coating die head is dried by a pair of lateral exhaust cavities.

2. The coating die cleaning mechanism according to claim 1, wherein The depression depth of the immersion tank on the air knife main body gradually decreases from the middle of its length direction to both sides.

3. The coating die cleaning mechanism according to claim 1 or 2, characterized in that, The air knife main body includes an air knife base and a pair of air knife top plates for cooperating to form a pair of lateral exhaust cavities; and A pair of the air knife top plates and the air knife base also sandwich a slit gasket for forming an air outlet.

4. The coating die cleaning mechanism according to claim 3, wherein The slit gasket at least includes a strip-shaped gasket main body for covering the side of the air knife base facing away from the immersion tank in the lateral exhaust cavity.

5. The coating die cleaning mechanism according to claim 4, characterized in that, The slit gasket also includes a pair of extension pieces for covering the two width direction ends of the air knife base in the lateral exhaust cavity; and The pair of extension pieces are connected to the strip-shaped gasket main body.

6. The coating die cleaning mechanism according to claim 3, characterized in that, The cross-section of the immersion tank in the width direction is V-shaped, and the included angle range of the V-shape is 130° to 150°.

7. The coating die cleaning mechanism according to claim 6, characterized in that, The side end faces of the pair of air knife top plates facing each other both extend to the side edges of the immersion tank in the length direction.

8. The coating die cleaning mechanism according to claim 7, characterized in that, The side end face of each air knife top plate facing each other is an inclined mating surface coplanar with the side tank wall of the immersion tank in the length direction.

9. The coating die cleaning mechanism according to claim 1, wherein Liquid inlet grooves communicating with the immersion tank are respectively provided at the side ends of the air knife main body in the width direction of the immersion tank; and The liquid inlet grooves are configured with liquid inlets for introducing the cleaning liquid into the liquid inlet grooves; and a splash-proof plate for preventing the cleaning liquid from splashing from the liquid inlets is also provided in the liquid inlet grooves.

10. A coating device, characterized in that, At least including: A coating die head and a coating die head cleaning mechanism according to any one of claims 1 to 9.

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