Pre-coating device and coating equipment

Abstract

The utility model relates to a pre-coating device and coating equipment. The pre-coating device comprises a pre-coating roller, a cleaning assembly, a cleaning assembly and a drying assembly, wherein the cleaning assembly, the cleaning assembly and the drying assembly are arranged in the circumferential direction of the pre-coating roller; the pre-coating roller can controllably rotate around the axis of the pre-coating roller, and the cleaning assembly, the cleaning assembly and the drying assembly are sequentially arranged in the rotating direction of the pre-coating roller; the roller surface of the pre-coating roller reaching the position between the drying assembly and the cleaning assembly is used for bearing a coating material formed by coating of the die head; the cleaning assembly is used for removing a coating material on the roller surface of the pre-coating roller, the cleaning assembly is used for cleaning the roller surface of the pre-coating roller, and the drying assembly is used for drying the roller surface of the pre-coating roller. Thus, by means of rotation of the pre-coating roller, the roller surface of the pre-coating roller sequentially and circularly passes through the cleaning assembly, the cleaning assembly and the drying assembly, it is ensured that the roller surface, reaching the position between the drying assembly and the cleaning assembly, of the pre-coating roller is clean and dry, and then it is ensured that the die head can continuously conduct coating on the roller surface of the pre-coating roller.

Description

Technical Field

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

[0002] Solar energy is abundant in resources, green, environmentally friendly and pollution-free. It is one of the new energy sources that is expected to be widely used in the future. In the field of new solar cells, the rapid development of perovskite solar cells in recent years has attracted widespread attention from the scientific research and industrial circles. In the process of preparing perovskite solar cells, perovskite slurry needs to be coated on the substrate (such as glass).

[0003] Generally, when the coating of the substrate on the machine is completed, the coating die head stops coating; then, the coated substrate is unloaded from the machine, and the next substrate to be coated is loaded onto the machine; then, the coating die head continues to coat the substrate on the machine. In other words, the intermittent coating method is adopted, that is, after each substrate is coated, the substrate needs to be replaced, and the coating die head stops coating during the period of substrate replacement.

[0004] However, due to the intermittent coating method, the slurry at the lip of the coating die is prone to drying up during the period of stopping coating, or the slurry flows out due to gravity, causing cavitation at the lip of the coating die, which in turn leads to problems such as uneven coating thickness, blanking due to flow interruption, and crystal blockage during coating. Utility Model Content

[0005] Based on this, it is necessary to provide a pre-coating device and coating equipment to improve the above defects, in order to address the problems that the lip of the coating die head in the prior art is prone to drying up, cavitation, etc., which in turn lead to problems such as uneven coating thickness, flow interruption and blanking, and crystallization blockage during coating.

[0006] A pre-coating device comprises a pre-coating roller and a cleaning assembly, a washing assembly and a drying assembly arranged circumferentially around the pre-coating roller;

[0007] The pre-coating roller can be controlled to rotate around its own axis, and the cleaning component, the washing component and the drying component are arranged in sequence along the rotation direction of the pre-coating roller; the roller surface of the pre-coating roller that reaches between the drying component and the cleaning component is used to receive the coating material formed by the die head coating;

[0008] The cleaning component is used to remove the coating material on the roller surface of the pre-coating roller that arrives at the cleaning component, the cleaning component is used to clean the roller surface of the pre-coating roller that arrives at the cleaning component, and the drying component is used to dry the roller surface of the pre-coating roller that arrives at the drying component.

[0009] In one embodiment, the cleaning assembly includes a first-stage scraper, which contacts the roller surface of the pre-coating roller that reaches the first-stage scraper to scrape off the coating material on the roller surface of the pre-coating roller.

[0010] In one embodiment, the cleaning assembly further comprises a negative pressure cleaning member, wherein the negative pressure cleaning member and the first-stage scraper together form a receiving chamber, wherein the receiving chamber is used to receive the coating material scraped off the roller surface of the pre-coating roller by the first-stage scraper;

[0011] The negative pressure removing member has a discharge port connected to the accommodating chamber, and the discharge port is used to communicate with an external negative pressure source so that the coating material in the accommodating chamber is discharged from the discharge port under the negative pressure provided by the external negative pressure source.

[0012] In one embodiment, the cleaning assembly further includes a secondary scraper, which is arranged on the downstream side of the primary scraper in the rotation direction of the pre-coating roller and contacts the roller surface of the pre-coating roller reaching the secondary scraper to scrape off the coating material on the roller surface of the pre-coating roller.

[0013] In one embodiment, the secondary scraper is provided in plurality, and the plurality of secondary scrapers are arranged at intervals along the circumference of the pre-coating roller.

[0014] In one embodiment, the cleaning assembly includes a plurality of nozzles spaced apart along the axial direction of the pre-coating roller, and each of the nozzles is used to spray cleaning liquid onto the roller surface of the pre-coating roller that reaches the nozzle.

[0015] In one embodiment, the cleaning component also includes a first water tank, each of the nozzles is arranged in the first water tank, the pre-coating roller is located at the top of the first water tank, the top of the first water tank has a first collecting port, and each of the nozzles sprays cleaning liquid toward the roller surface of the pre-coating roller that reaches the first collecting port.

[0016] In one embodiment, the drying component includes a drying piece, which has a drying chamber and an air inlet and a drying port both connected to the drying chamber, the air inlet is used to input dry airflow into the drying chamber, and the drying port is located at one end of the drying piece facing the roller surface of the pre-coating roller, so that the dry airflow in the drying chamber can dry the roller surface of the pre-coating roller that arrives at the drying port.

[0017] In one embodiment, the drying component further includes a wiper, which is arranged between the cleaning component and the drying element and is used to scrape off the cleaning liquid on the roller surface of the pre-coating roller that reaches the wiper.

[0018] In one embodiment, the wiper blade is provided in plurality, and the plurality of wiper blades are arranged at intervals along the circumference of the pre-coating roller.

[0019] A coating device comprises a die head and a pre-coating device as described in any of the above embodiments.

[0020] The above-mentioned pre-coating device and coating device, when actually used, the pre-coating roller rotates at a certain speed, and the die head coats the roller surface of the pre-coating roller that arrives between the drying component and the cleaning component. Due to the rotation of the pre-coating roller itself, the coating material coated on the roller surface of the pre-coating roller circulates through the cleaning component, the washing component and the drying component in sequence. The cleaning component cleans the coating material on the roller surface of the pre-coating roller that arrives at the cleaning component to remove most of the coating material. The washing component uses a washing liquid to wash the roller surface of the pre-coating roller that arrives at the washing component to wash away the residual coating material. The drying component dries the roller surface of the pre-coating roller that arrives at the drying component to avoid the washing liquid remaining on the roller surface of the pre-coating roller, thereby ensuring that the roller surface of the pre-coating roller that arrives between the drying component and the cleaning component is clean and dry, so as to continue to receive the coating material formed by the die head coating.

[0021] In this way, the rotation of the pre-coating roller makes the roller surface of the pre-coating roller circulate through the cleaning component, the washing component and the drying component in sequence, ensuring that the roller surface of the pre-coating roller between the drying component and the cleaning component is clean and dry, so that the roller surface of the pre-coating roller simulates the surface of the substrate, ensuring that the die head can continuously coat on the roller surface of the pre-coating roller, thereby avoiding the slurry drying up at the lip of the die head due to cessation of coating, or the slurry outflowing due to gravity causing cavitation at the lip of the die head, thereby avoiding problems such as uneven coating thickness, interrupted flow and blanking, and crystallization blockage during coating. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 This is a schematic structural diagram of a pre-coating device in one embodiment of the utility model;

[0023] Figure 2 for Figure 1 The pre-coating device is shown in a cross-sectional view along the AA direction. DETAILED DESCRIPTION

[0024] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0025] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0026] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0027] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0029] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0030] See also Figure 1 and Figure 2 One embodiment of the utility model provides a coating device, including a die head 100 and a pre-coating device. The die head 100 is used to coat a substrate. In the interval between the completion of coating of the previous substrate and the coating of the next substrate, the die head 100 is coated on the pre-coating roller 10 of the pre-coating device, so as to avoid the lip slurry of the die head 100 drying up due to the cessation of coating, or the slurry outflowing due to gravity causing cavitation at the lip of the die head 100, thereby avoiding the problems of uneven coating thickness, blanking, crystallization blockage, etc. when coating the substrate again.

[0031] Furthermore, the coating equipment also includes a coating platform, which is used to load the substrate to be coated. When the substrate to be coated is loaded onto the coating platform, the die head 100 moves to the top of the coating platform and coats the substrate on the coating platform. After coating, the die head 100 moves to the top of the pre-coating roller 10 of the pre-coating device and continues to coat the pre-coating roller 10 of the pre-coating device. At the same time, the substrate coated on the coating platform is unloaded, and the next substrate to be coated is loaded onto the coating platform. Then, the die head 100 moves to the top of the coating platform again and coats the substrate on the coating platform. In this way, batch coating operations on multiple substrates are achieved.

[0032] It should be noted that, in the early stage of coating production or the process test stage, in order to observe the coating effect, the die head 100 can also be controlled to coat on the pre-coating roller 10 of the pre-coating device, thereby avoiding waste caused by coating directly on the substrate. Of course, the die head 100 can also be controlled to coat on the pre-coating roller 10 of the pre-coating device at other required time points, which is not limited here.

[0033] In an embodiment of the present application, the pre-coating device includes a pre-coating roller 10 and a cleaning assembly 20, a washing assembly 30 and a drying assembly 40 arranged circumferentially around the pre-coating roller 10. The pre-coating roller 10 can be controlled to rotate around its own axis, and the cleaning assembly 20, the washing assembly 30 and the drying assembly 40 are arranged in sequence along the rotation direction of the pre-coating roller 10. The roller surface of the pre-coating roller 10 reaches the area between the drying assembly 40 and the cleaning assembly 20 for receiving the coating material B formed by the die head 100. The cleaning assembly 20 is used to remove the coating material B on the roller surface of the pre-coating roller 10 that arrives at the cleaning assembly 20. The washing assembly 30 is used to wash the roller surface of the pre-coating roller 10 that arrives at the washing assembly 30. The drying assembly 40 is used to dry the roller surface of the pre-coating roller 10 that arrives at the drying assembly 40.

[0034] In the actual use of the above-mentioned pre-coating device, the pre-coating roller 10 rotates at a certain speed, and the die head 100 applies the coating material B to the roller surface of the pre-coating roller 10 that arrives between the drying assembly 40 and the cleaning assembly 20. As the pre-coating roller 10 rotates itself, the coating material B coated on the roller surface of the pre-coating roller 10 circulates through the cleaning assembly 20, the washing assembly 30 and the drying assembly 40 in sequence. The cleaning assembly 20 cleans the coating material B on the roller surface of the pre-coating roller 10 that arrives at the cleaning assembly 20 to remove most of the coating material B. The washing assembly 30 washes the coating material B on the roller surface of the pre-coating roller 10 that arrives at the washing assembly 30 with a washing liquid to wash away the residual coating material B. The drying component 40 dries the roller surface of the pre-coating roller 10 that reaches the drying component 40 to prevent the cleaning liquid from remaining on the roller surface of the pre-coating roller 10, thereby ensuring that the roller surface of the pre-coating roller 10 that reaches between the drying component 40 and the cleaning component 20 is clean and dry, so as to continue to receive the coating material B formed by the die head 100.

[0035] In this way, the rotation of the pre-coating roller 10 makes the roller surface of the pre-coating roller 10 circulate through the cleaning component 20, the washing component 30 and the drying component 40 in sequence, ensuring that the roller surface of the pre-coating roller 10 that reaches the drying component 40 and the cleaning component 20 is clean and dry, so that the roller surface of the pre-coating roller 10 simulates the surface of the substrate, ensuring that the die head 100 can continuously coat on the roller surface of the pre-coating roller 10, thereby avoiding the lip slurry of the die head 100 drying up due to cessation of coating, or the lip cavitation of the die head 100 due to the outflow of slurry due to gravity, thereby avoiding the problems of uneven coating thickness, interrupted flow and blanking, crystallization blockage, etc. during coating.

[0036] Specifically in the embodiment, both ends of the pre-coating roller 10 are mounted on the bracket through bearings 50, and one end of the pre-coating roller 10 is connected to the output shaft of the reduction motor 60 through a coupling, so that the reduction motor 60 can drive the pre-coating roller 10 to rotate around its own axis. Figure 2 In the illustrated embodiment, the reduction motor 60 is used to drive the pre-coating roller 10 to rotate in a clockwise direction.

[0037] Specific to Figure 2 In the illustrated embodiment, the roller surface at the top of the pre-coating roller 10 receives the coating material B formed by the die head 100. The pre-coating roller 10 rotates clockwise around its own axis. The cleaning assembly 20 is arranged on the right side of the pre-coating roller 10, and is used to clean the coating material B on the roller surface on the right side of the pre-coating roller 10. The cleaning assembly 30 is arranged below the pre-coating roller 10, and is used to clean the roller surface at the bottom of the pre-coating roller 10. The drying assembly 40 is located on the left side of the pre-coating roller 10, and is used to dry the roller surface on the left side of the pre-coating roller 10.

[0038] See also Figure 2 As shown, in the embodiment of the present application, the cleaning assembly 20 includes a first-stage scraper 21, which contacts the roller surface of the pre-coating roller 10 that reaches the first-stage scraper 21 to scrape off the coating material B on the roller surface of the pre-coating roller 10. In this way, since the first-stage scraper 21 contacts the roller surface of the pre-coating roller 10 that reaches the first-stage scraper 21, the coating material B on the roller surface of the pre-coating roller 10 can be scraped off by the first-stage scraper 21 when the pre-coating roller 10 rotates, thereby achieving the purpose of cleaning the coating material B on the roller surface of the pre-coating roller 10.

[0039] Specifically in the embodiment, the cleaning assembly 20 also includes a negative pressure removal member 22. The negative pressure removal member 22 and the first-stage scraper 21 together enclose a receiving chamber a1. The receiving chamber a1 is used to accommodate the coating material B scraped off from the roller surface of the pre-coating roller 10 by the first-stage scraper 21. The negative pressure removal member 22 has a discharge port a2 connected to the receiving chamber a1. The discharge port a2 is used to communicate with an external negative pressure source so that the coating material B in the receiving chamber a1 is discharged from the discharge port a2 under the action of the negative pressure provided by the external negative pressure source. In this way, when the pre-coating roller 10 rotates, the first-stage scraper 21 scrapes off the coating material B on the roller surface of the pre-coating roller 10, and the scraped coating material B falls into the receiving chamber a1 enclosed by the first-stage scraper 21 and the negative pressure removal member 22. The coating material B entering the receiving chamber a1 is discharged from the discharge port a2 under the action of the external negative pressure, thereby realizing the collection of the coating material B. Alternatively, the external negative pressure source may be an exhaust fan.

[0040] Furthermore, a third collecting port a3 is formed between one end of the primary scraper 21 facing the pre-coating roller 10 and one end of the negative pressure removal member 22 facing the pre-coating roller 10. The coating material B scraped off by the primary scraper 21 enters the accommodating chamber a1 between the primary scraper 21 and the negative pressure removal member 22 through the third collecting port a3, and is then discharged through the discharge port a2 under the action of negative pressure.

[0041] Specifically in the embodiment, the cleaning assembly 20 further includes a secondary scraper 23. The secondary scraper 23 is arranged on the downstream side of the primary scraper 21 in the rotation direction of the pre-coating roller 10, and contacts the roller surface of the pre-coating roller 10 that reaches the secondary scraper 23, so as to scrape off the coating material B remaining on the roller surface of the pre-coating roller 10. In this way, in actual use, the primary scraper 21 is first used to scrape off the coating material B on the roller surface of the pre-coating roller 10; and then the secondary scraper 23 is used to scrape off the coating material B remaining on the roller surface of the pre-coating roller 10, thereby greatly reducing the amount of coating material B remaining on the roller surface of the pre-coating roller 10, ensuring that there is no coating material B remaining on the roller surface of the pre-coating roller 10 after being cleaned by the cleaning assembly 30.

[0042] It should be noted that the number of the secondary scrapers 23 is not limited to one. In some embodiments, the number of the secondary scrapers 23 can be two or more (i.e., multiple). The multiple secondary scrapers 23 are arranged at intervals along the circumference of the pre-coating roller 10, so that the coating material B remaining on the roller surface of the pre-coating roller 10 is scraped off in sequence by each secondary scraper 23 (i.e., multiple scrapings are performed), ensuring that the scraping is as clean as possible.

[0043] In the embodiment of the present application, the cleaning assembly 30 includes a plurality of nozzles 31 arranged at intervals along the axial direction of the pre-coating roller 10. Each nozzle 31 is used to spray cleaning liquid onto the roller surface of the pre-coating roller 10 that reaches the nozzle 31, thereby cleaning the roller surface of the pre-coating roller 10 that reaches the cleaning assembly 30, so as to clean off the coating material B remaining on the roller surface of the pre-coating roller 10 that reaches the cleaning assembly 30.

[0044] Furthermore, the cleaning assembly 30 further includes a high-pressure water pipe 32, which is arranged at the bottom of the pre-coating roller 10 and extends longitudinally along the axial direction of the pre-coating roller 10. The above-mentioned nozzles 31 are installed on the side of the high-pressure water pipe 32 facing the pre-coating roller 10, and are arranged at intervals along the longitudinal extension direction of the high-pressure water pipe 32. In this way, the cleaning liquid in the high-pressure water pipe 32 enters each nozzle 31 and is sprayed from each nozzle 31 onto the roller surface at the bottom of the pre-coating roller 10, thereby achieving the cleaning of the roller surface of the pre-coating roller 10 that reaches the cleaning assembly 30.

[0045] It should be noted that the number of nozzles 31 can be set according to the length of the pre-coating roller 10, which is not limited here. The spacing between two adjacent nozzles 31 is set according to the spraying range of the nozzle 31 and the distance from the pre-coating roller 10, which is not limited here.

[0046] Specifically in the embodiment, the cleaning assembly 30 also includes a first water tank 33. Each nozzle 31 and a high-pressure water pipe 32 are arranged in the first water tank 33. The pre-coating roller 10 is located at the top of the first water tank 33, and the top of the first water tank 33 has a first collecting port 331. Each nozzle 31 sprays the cleaning liquid toward the roller surface of the pre-coating roller 10 arriving at the first collecting port 331, thereby cleaning the roller surface of the pre-coating roller 10 arriving at the first collecting port 331. The cleaning liquid sprayed by each nozzle 31 eventually falls into the first water tank 33 through the first collecting port 331 for collection, so as to prevent the sprayed cleaning liquid from contaminating other components.

[0047] Furthermore, a drain port 332 is provided at the bottom of the first water tank 33, and the drain port 332 is connected to a drain pipe, so that the cleaning liquid in the first water tank 33 is discharged from the drain port 332, thereby preventing the liquid level in the first water tank 33 from being too high and submerging each nozzle 31, resulting in abnormal spraying of each nozzle 31.

[0048] Furthermore, the cleaning component 30 also includes a second water tank 34, and the first water tank 33 is located in the second water tank 34. The top of the second water tank 34 has a second collecting port 341, and the second collecting port 341 is used to collect the overflowing cleaning liquid, so as to avoid the overflowing cleaning liquid from contaminating other components. It should be noted that since the first water tank 33 is sleeved inside the second water tank 34, the area of ​​the second collecting port 341 at the top of the second water tank 34 is larger than the area of ​​the first collecting port 331 at the top of the first water tank 33, and most of the cleaning liquid is collected into the first water tank 33 through the first collecting port 331 and discharged, and the remaining cleaning liquid is collected into the second water tank 34 through the second collecting port 341.

[0049] Furthermore, the second water tank 34 is also used to collect the coating material B dropped from each secondary scraper 23 to prevent the coating material B scraped off by each secondary scraper 23 from contaminating other components. In other words, the second collection port 341 of the second water tank 34 is partially located below each secondary scraper 23, so that the coating material B scraped off by the secondary scraper 23 can automatically fall into the second water tank 34.

[0050] In an embodiment of the present application, the drying component 40 includes a drying member 41, which has a drying chamber 411 and an air inlet 412 and a drying port 413 both of which are connected to the drying chamber 411. The air inlet 412 is used to input a dry airflow into the drying chamber 411. The drying port 413 is located at one end of the drying member 41 facing the roller surface of the pre-coating roller 10, so that the dry airflow in the drying chamber 411 dries the roller surface of the pre-coating roller 10 that arrives at the drying port 413. In this way, the dry airflow enters the drying chamber 411 through the air inlet 412, and then reaches the roller surface of the pre-coating roller 10 through the drying port 413, thereby drying the roller surface of the pre-coating roller 10 that rotates to arrive at the drying port 413, so as to avoid residual cleaning liquid on the roller surface of the pre-coating roller 10. It should be noted that, in some embodiments, the drying member 41 also has an air outlet connected to the drying chamber 411, and the air outlet is used to discharge the air flow in the drying chamber 411. That is, the dry air flow enters the drying chamber from the air inlet 412, dries the roller surface of the pre-coating roller 10 that arrives at the drying port 413, and then carries moisture, and the air flow carrying moisture is then output from the air outlet.

[0051] Furthermore, the drying opening 413 is in a long strip shape and extends longitudinally along the axial direction of the pre-coating roller 10 , so that all areas of the roller surface of the pre-coating roller 10 in the axial direction can be dried.

[0052] Specifically in the embodiment, the drying assembly 40 further includes a wiper 42 disposed between the cleaning assembly 30 and the drying member 41. The wiper 42 is used to scrape off the cleaning liquid on the roller surface of the pre-coating roller 10 that reaches the wiper 42. In this way, before the roller surface of the pre-coating roller 10 is dried, the cleaning liquid is scraped off by the wiper 42, thereby greatly reducing the amount of cleaning liquid remaining on the roller surface of the pre-coating roller 10, ensuring that the roller surface of the pre-coating roller 10 can be thoroughly dried by the drying member 41.

[0053] It should be noted that the number of wiper blades 42 is not limited to one. In other embodiments, the number of wiper blades 42 may be two or more (i.e., multiple). Multiple wiper blades 42 are arranged at intervals along the circumference of the pre-coating roller 10. In this way, the roller surface of the pre-coating roller 10 is scraped in multiple passes using multiple wiper blades 42, thereby scraping off as much cleaning liquid as possible on the roller surface of the pre-coating roller 10, ensuring that the roller surface of the pre-coating roller 10 reaching the drying port 413 can be completely dried. Specifically, Figure 2 In the illustrated embodiment, the number of wiper blades 42 is two.

[0054] Furthermore, the cleaning liquid scraped off by each wiper blade 42 drips from the first collecting port 331 into the first water tank 33 , thereby collecting the cleaning liquid scraped off by each wiper blade 42 and preventing the cleaning liquid from contaminating other components.

[0055] Specifically in the embodiment, the pre-coating device further includes a housing 70, and the cleaning assembly 20, the washing assembly 30 and the drying assembly 40 are all arranged in the housing 70. The top of the housing 70 has an opening, and the roller surface at the top of the pre-coating roller 10 is located at the opening, so that the die head 100 can apply the coating material on the roller surface at the top of the pre-coating roller 10 through the opening.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. A pre-coating device, characterized in that: The invention comprises a pre-coating roller and a cleaning component, a washing component and a drying component which are arranged circumferentially around the pre-coating roller; The pre-coating roller can be controlled to rotate around its own axis, and the cleaning component, the washing component and the drying component are arranged in sequence along the rotation direction of the pre-coating roller; the roller surface of the pre-coating roller that reaches between the drying component and the cleaning component is used to receive the coating material formed by the die head coating; The cleaning component is used to remove the coating material on the roller surface of the pre-coating roller that arrives at the cleaning component, the cleaning component is used to clean the roller surface of the pre-coating roller that arrives at the cleaning component, and the drying component is used to dry the roller surface of the pre-coating roller that arrives at the drying component.

2. The pre-coating device according to claim 1, characterized in that: The cleaning assembly includes a first-stage scraper, which contacts the roller surface of the pre-coating roller that reaches the first-stage scraper to scrape off the coating material on the roller surface of the pre-coating roller.

3. The pre-coating device according to claim 2, characterized in that: The cleaning assembly further comprises a negative pressure cleaning member, wherein the negative pressure cleaning member and the first-stage scraper together form a receiving chamber, wherein the receiving chamber is used to receive the coating material scraped off the roller surface of the pre-coating roller by the first-stage scraper; The negative pressure removing member has a discharge port connected to the accommodating chamber, and the discharge port is used to communicate with an external negative pressure source so that the coating material in the accommodating chamber is discharged from the discharge port under the negative pressure provided by the external negative pressure source.

4. The pre-coating device according to claim 2, characterized in that: The cleaning assembly also includes a secondary scraper, which is arranged on the downstream side of the primary scraper in the rotation direction of the pre-coating roller and contacts the roller surface of the pre-coating roller reaching the secondary scraper to scrape off the coating material on the roller surface of the pre-coating roller.

5. The pre-coating device according to claim 4, characterized in that: The secondary scraper is provided in plurality, and the plurality of secondary scrapers are arranged at intervals along the circumference of the pre-coating roller.

6. The pre-coating device according to claim 1, characterized in that: The cleaning assembly comprises a plurality of nozzles spaced apart along the axial direction of the pre-coating roller, and each of the nozzles is used for spraying cleaning liquid onto the roller surface of the pre-coating roller that reaches the nozzle.

7. The pre-coating device according to claim 6, characterized in that: The cleaning component also includes a first water tank, each of the nozzles is arranged in the first water tank, the pre-coating roller is located at the top of the first water tank, the top of the first water tank has a first collecting port, and each of the nozzles sprays cleaning liquid toward the roller surface of the pre-coating roller that reaches the first collecting port.

8. The pre-coating device according to claim 1, characterized in that: The drying component includes a drying piece, which has a drying chamber and an air inlet and a drying port both connected to the drying chamber, the air inlet being used to input dry airflow into the drying chamber, and the drying port being located at one end of the drying piece facing the roller surface of the pre-coating roller, so that the dry airflow in the drying chamber dries the roller surface of the pre-coating roller that arrives at the drying port.

9. The pre-coating device according to claim 8, characterized in that: The drying component further includes a wiper, which is arranged between the cleaning component and the drying member and is used to scrape off the cleaning liquid on the roller surface of the pre-coating roller that reaches the wiper.

10. The pre-coating device according to claim 9, characterized in that: The wiper blades are provided in plurality, and the plurality of wiper blades are arranged at intervals along the circumference of the pre-coating roller.

11. A coating device, characterized in that: The invention comprises a die head and a pre-coating device as claimed in any one of claims 1 to 10.

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