TWI803629B - Equipment for cleaning coating nozzle - Google Patents

Abstract

This invention discloses an equipment for cleaning coating nozzle which removes coating liquid left on a tip end portion of an coating nozzle with a cleaning member after the coating liquid is discharged from a slit-shaped discharging opening provided on a tip end surface of the coating nozzle moving on an object to be coated to be coated on a surface of the object to be coated, wherein the equipment for cleaning coating nozzle is provide with cleaning scraping portions corresponding to the shape of the tip end portion of the coating nozzle on a first cleaning member and a second cleaning member provided at a predetermined intervals in the traveling direction of the coating nozzle, the first and second cleaning members are inclined in opposite directions toward the longitudinal direction of the tip end portion of the coating nozzle, and the first and second cleaning members are sequentially moved in opposite directions such that the cleaning scraping portions of the cleaning members are positioned along the tip end portion of the coating nozzle, so as to clean the tip end portion of the coating nozzle.

Description

Coating nozzle cleaning device

，「日本註冊商標」，以下省略)所使用的塗布用管嘴當中，用來清掃設有吐出塗液用的狹縫狀吐出口的塗布用管嘴的前端部。尤其是，在使塗液從在被塗布體上方行進的塗布用管嘴的前端面所設置的狹縫狀吐出口吐出而將塗液塗布在被塗布體的表面之後，利用沿著塗布用管嘴的前端部移動的清掃構件將殘留在設有狹縫狀吐出口的塗布用管嘴的前端部的塗液去除來清掃塗布用管嘴的前端部的塗布用管嘴的清掃裝置當中，具有下列特點：在有從前述塗布用管嘴的前端部去除的一部分塗液附著於清掃構件，而進行了幾次利用清掃構件進行清掃而去除殘留在塗布用管嘴的前端部的塗液的操作的情況，可確實防止附著於清掃構件的塗液逐漸蓄積，且如此蓄積的塗液從清掃構件附著於塗布用管嘴的前端部而黏附在被塗布體或其周邊而發生塗工不良，尤其是，即使在使用黏度高的塗液的情況，也可避免附著並蓄積於清掃構件的塗液附著在塗布用管嘴的前端部而黏附在被塗布體或其周邊，可利用清掃構件穩定且充分地清掃塗布用管嘴的前端部。 The present invention relates to a cleaning device for coating nozzles. The cleaning device for coating nozzles is a desktop coating machine (

, "Japanese registered trademark", hereinafter omitted) among the coating nozzles used, it is used to clean the front end of the coating nozzle provided with the slit-shaped discharge port for discharging the coating liquid. In particular, after the coating liquid is sprayed out from the slit-shaped discharge port provided on the front end face of the coating nozzle advancing above the object to be coated to coat the surface of the object to be coated, the In the cleaning device of the coating nozzle, the cleaning member that moves the tip of the nozzle removes the coating liquid remaining at the tip of the coating nozzle provided with a slit-shaped discharge port to clean the tip of the coating nozzle. The following feature: a part of the coating liquid removed from the front end of the coating nozzle adheres to the cleaning member, and the operation of cleaning with the cleaning member to remove the coating liquid remaining on the front end of the coating nozzle is performed several times In this case, it is possible to reliably prevent the coating liquid adhering to the cleaning member from gradually accumulating, and the coating liquid accumulated in this way adheres to the object to be coated or its surroundings from the cleaning member to the front end of the coating nozzle to cause poor coating, especially Yes, even in the case of using a high-viscosity coating liquid, it is possible to prevent the coating liquid attached and accumulated on the cleaning member from adhering to the front end of the coating nozzle and adhering to the object to be coated or its surroundings, and the cleaning member can be used stably and Clean the tip of the coating nozzle sufficiently.

In the manufacture of plasma display panels, organic electroluminescent display panels, liquid crystal display panels, etc., desktop coaters have been used in the past. A nozzle for coating with a slit-shaped discharge port, and the nozzle for coating is moved above the object to be coated as described above, and at the same time, the coating liquid is discharged from the slit-shaped discharge port provided at the front end of the nozzle for coating The coating solution is discharged onto the surface of the object to be coated to apply the coating liquid on the surface of the object to be coated.

However, when the coating liquid is applied to the surface of the object to be coated in this way, the coating liquid partially remains on the discharge port at the front end of the coating nozzle or its peripheral portion.

Moreover, when the coating liquid is applied to the surface of the next object to be coated by using a coating nozzle with a partially remaining coating liquid, it may occur that the coating liquid is left on the front end of the coating nozzle and the surface of the object being coated is damaged. The coating solution on the surface of the next object to be coated has problems such as streaky coating unevenness.

Therefore, a kind of following technique has been proposed in the past: After the coating liquid is coated on the surface of the object to be coated from the discharge port at the front end of the coating nozzle as described above, the coating nozzle is guided to the surface of the object to be coated. The cleaning device at the position where the body is separated, and as shown in Patent Documents 1 to 3, the cleaning member provided in the cleaning device is moved along the front end of the coating nozzle, and the cleaning member is used to clean the residue on the front end of the coating nozzle. The coating liquid on the part is scraped off from the front end of the coating nozzle to remove it.

Here, as for the above-mentioned coating nozzle, generally, as shown in the above-mentioned Patent Documents 1 to 3, a kind of elongated front end surface on both sides of the front end of the coating nozzle provided with a slit-shaped discharge port is generally used. There is a V-shaped labial arch slope that expands upward to form a slope, and the front end forms a roughly V-shape. On the other hand, in the cleaning device for cleaning the front end of the coating nozzle, the cleaning member is provided with a cleaning scraper with a substantially V-shaped slit. The elongated front end surface of the front end portion of the coating nozzle is in contact with the V-shaped lip arch slopes provided on both sides to remove the coating liquid remaining on these parts.

Also, Patent Document 1 discloses a combination of not only a cleaning scraper with a substantially V-shaped notch but also V-shaped left and right slopes as other cleaning scrapers.

Moreover, conventionally, the nozzle for coating after coating the surface of the object to be coated with the coating liquid as described above is guided to the cleaning device, and the front end of the nozzle for coating is inserted into the scraper for cleaning in the cleaning member. The incision etc. of the front end of the nozzle for coating and the V-shaped labial arch slopes on both sides of the front end of the coating nozzle are in contact with the cleaning scraper part of the cleaning member, and in this state , the cleaning member is moved along the front end of the coating nozzle, and then the coating liquid remaining on the front end of the coating nozzle is removed from the front end of the coating nozzle by the cleaning member.

However, when the coating solution remaining at the tip of the coating nozzle is removed from the tip of the coating nozzle by the cleaning member in this way, the coating solution removed from the tip of the coating nozzle will adhere and remain on the In the aforementioned cleaning member, especially in the case of a high-viscosity coating liquid, the coating liquid adhering to the cleaning member will remain without dripping from the cleaning member, and the amount of coating liquid adhering to and remaining on the cleaning member will gradually increase, and thus The coating liquid adhered and remained on the cleaning member gradually solidifies.

Next, the coating solution that adheres and remains on the cleaning member and gradually solidifies will adhere to the coating part or outside the coating part of the front end of the nozzle for coating. When the nozzle applies a new coating solution on the surface of the object to be coated, the solidified coating solution becomes foreign matter and adheres to the part to be coated or outside the part to be coated, causing a problem of defective coating.

Here, the coating liquid that adheres and remains on the cleaning member and solidifies in this way adheres to the coating part or the outside of the coating part at the front end of the coating nozzle, and when the coating liquid is applied by using this coating nozzle On the surface of the object to be coated, foreign matter adheres to or outside the coated portion, resulting in defective coating. The aforementioned Patent Documents 1 to 3 do not particularly disclose a solution to this situation.

[Prior Art Literature] [Patent Document]

[Patent Document 1] Japanese Patent Laid-Open No. 2008-149247

[Patent Document 2] Japanese Unexamined Patent Publication No. 2012-185404

[Patent Document 3] Japanese Patent Laid-Open No. 2011-167607

The object of the present invention is to solve the above-mentioned problems of the cleaning device for coating nozzles, which is a table-top coating machine for coating various coating liquids on the surface of a target object such as a glass plate. Among the coating nozzles used, the tip portion of the coating nozzle provided with a slit-shaped discharge port for discharging the coating liquid is used for cleaning.

Furthermore, the subject of the coating nozzle cleaning device of the present invention is to move the coating nozzle relative to the object to be coated and discharge the coating liquid from the slit formed on the front end surface of the coating nozzle. After the outlet is coated on the surface of the object to be coated, the coating nozzle is guided to a cleaning device, and the coating nozzle that is provided with a slit-shaped discharge port is cleaned by a cleaning member that moves along the front end of the coating nozzle. When cleaning the front end of the coating nozzle by removing the coating liquid at the front end of the coating nozzle, even if a part of the coating liquid removed from the front end of the coating nozzle adheres to and accumulates in the cleaning member, and the thus accumulated coating liquid adheres to the cleaning member At the front end of the coating nozzle, the attached coating liquid can also be properly removed from the front end of the coating nozzle by a cleaning member to prevent the occurrence of poor coating work, especially when using a high-viscosity coating liquid. It is also possible to prevent the coating liquid attached and accumulated on the cleaning member from adhering to the tip of the coating nozzle and sticking to the object to be coated or its surroundings, and the tip of the coating nozzle can be cleaned stably and sufficiently by the cleaning member.

In order to solve the above-mentioned problems, in the cleaning device of the coating nozzle of the present invention, a coating nozzle formed to be long in the direction intersecting with the direction of traveling above the object to be coated is used. The front end surface of the nozzle facing the object to be coated is provided with a slit-shaped outlet for discharging the coating liquid along the longitudinal direction of the nozzle for coating, and the nozzle for coating is above the object to be coated. After advancing and discharging the coating liquid from the aforementioned slit-shaped discharge port to coat the coating liquid on the surface of the object to be coated, the cleaning member moving below the coating nozzle along the front end of the coating nozzle removes the remaining Cleaning the front end of the coating nozzle with the coating solution including the front end of the front end surface of the coating nozzle provided with a slit-shaped discharge port, wherein: the distance is separated by a required interval in the direction of travel of the coating nozzle The first cleaning member and the second cleaning member with a cleaning scraper portion corresponding to the shape of the front end of the coating nozzle are provided as the cleaning member, and the first cleaning member and the second cleaning member are From the bottom of the coating nozzle toward the front end of the coating nozzle, it is inclined in the opposite direction relative to the longitudinal direction of the coating nozzle, and the cleaning scraper in the first cleaning member and the second cleaning member The cleaning part moves the first cleaning member and the second cleaning member sequentially along the front end of the coating nozzle in opposite directions so as to clean the front end of the coating nozzle.

And, as shown in the cleaning device of the coating nozzle of the present invention, a cleaning device corresponding to the shape of the front end of the coating nozzle is provided with a required interval in the direction of travel of the coating nozzle. The first cleaning member and the second cleaning member of the scraping part are used as cleaning members, and the first cleaning member and the second cleaning member are directed from the bottom of the coating nozzle to the front end of the coating nozzle and facing the coating nozzle. The long side direction of the nozzle is inclined in the opposite direction, and the first cleaning member and the second cleaning member are arranged so that the cleaning scraper portion of the first cleaning member and the second cleaning member is along the front end portion of the coating nozzle. The members move in the opposite direction along the front end of the coating nozzle in order to clean the front end of the coating nozzle. One cleaning member, and thus accumulated coating liquid adheres to the front end of the coating nozzle from one cleaning member, and the adhered coating liquid can also be properly removed from the front end of the coating nozzle by the other cleaning member.

Here, in the coating nozzle cleaning device of the present invention, the first cleaning member and the second cleaning member are arranged in the longitudinal direction of the front end portion of the coating nozzle intersecting with the traveling direction of the coating nozzle. When tilting in the opposite direction, it is preferable to move the first cleaning member and the second cleaning member toward the front end of the coating nozzle from below the coating nozzle toward the front end of the coating nozzle. tilt. In this way, even in the case of using a high-viscosity coating liquid such as polyimide, the coating liquid remaining at the tip of the coating nozzle can be cleaned by the first cleaning method inclined in the moving direction as described above. The member or the second cleaning member can be reliably scraped downward to sufficiently remove the coating liquid remaining at the tip of the coating nozzle.

Also, in the cleaning device of the coating nozzle of the present invention, a first front end surface for cleaning the front end surface of the coating nozzle provided with a slit-shaped discharge port may be provided on the downstream side of the moving direction of the first cleaning member. A cleaning member is provided, and a second front end cleaning member for cleaning the front end of the coating nozzle provided with a slit-shaped discharge port is provided on the downstream side of the moving direction of the second cleaning member. In this way, after the coating liquid is discharged from the slit-shaped discharge port provided on the front end face of the coating nozzle that travels above the object to be coated to the surface of the object to be coated to apply the coating liquid on the surface of the object to be coated, The coating liquid remaining on the front end surface of the coating nozzle provided with the slit-shaped discharge port can be surely removed by cleaning with the first front end surface cleaning member and the second front end surface cleaning member. In addition, the situation of setting the above-mentioned 1st front end surface cleaning member and the 2nd front end surface cleaning member is the same as the situation of the aforementioned 1st cleaning member and the 2nd cleaning member, so that when they are respectively facing the front end portion of the nozzle for cleaning. It is better to move in an inclined direction.

In addition, in the cleaning device of the coating nozzle according to the present invention, in the case of using a low-viscosity coating liquid, the first cleaning member and the second cleaning member are respectively directed to the moving direction when cleaning the front end portion of the coating nozzle. The method of tilting in the opposite direction is also effective.

Also, in the cleaning device of the coating nozzle of the present invention, when the front end portion of the coating nozzle is cleaned by the first cleaning member and the second cleaning member, the coating nozzle can be set so as to be able to be positioned relative to the first cleaning member. The cleaning member and the second cleaning member move up and down relative to each other to guide the front end of the coating nozzle to the cleaning scraping portion of the first cleaning member, and clean the coating nozzle with the first cleaning member. Next, the front end of the coating nozzle is guided into the cleaning scraper portion of the second cleaning member, and the front end of the coating nozzle is cleaned by the second cleaning member. In this case, in addition to lifting and moving the nozzle for coating, both the first cleaning member and the second cleaning member can be lifted and moved. Mobile is best.

In the coating nozzle cleaning device of the present invention, a cleaning scraper corresponding to the shape of the front end of the coating nozzle is provided at a required interval in the traveling direction of the coating nozzle. The first cleaning member and the second cleaning member are used as the cleaning members, and the first cleaning member and the second cleaning member are directed from the bottom of the coating nozzle to the front end of the coating nozzle and relative to the coating nozzle. The longitudinal direction is inclined in the opposite direction, and the first cleaning member and the second cleaning member are arranged in order so that the cleaning scraper portion of the first cleaning member and the second cleaning member is along the front end of the coating nozzle. Move in opposite directions along the front end of the coating nozzle respectively, and clean the front end of the coating nozzle with the first cleaning member and the second cleaning member, so even if there is a part removed from the front end of the coating nozzle The coating liquid adheres and accumulates on one cleaning member, and the accumulated coating liquid is attached to the front end of the coating nozzle from one cleaning member, and the adhered coating liquid can also be cleaned from the coating nozzle by the other cleaning member. The front end is appropriately removed.

Here, the method of moving the first cleaning member and the second cleaning member sequentially along the front end of the coating nozzle in the opposite direction is as long as the second cleaning member is moved after the first cleaning member is moved. Just move, but you can do this action multiple times.

As a result, in the cleaning device of the coating nozzle of the present invention, even if the coating liquid attached and accumulated on the cleaning member adheres to the front end of the coating nozzle from the cleaning member, the attached coating liquid can be removed from the coating nozzle. Appropriate removal of the front end can reliably prevent the occurrence of poor coating work. Especially, even when using a high-viscosity coating liquid, the coating liquid that adheres and accumulates on the cleaning member will not adhere to the front end of the coating nozzle. The tip portion of the coating nozzle can be stably and sufficiently cleaned by the cleaning member on the object to be coated or its periphery.

10‧‧‧Table Coater

11‧‧‧Workbench

12‧‧‧Travel track

13‧‧‧Traveling components

20‧‧‧Nozzle for coating

21‧‧‧front face

22‧‧‧spit outlet

23‧‧‧Lip arch slope

24‧‧‧Manifold

25‧‧‧Guide Road

30‧‧‧Cleaning device

31‧‧‧guiding track

32‧‧‧Mobile platform for cleaning

33‧‧‧The first cleaning member

33a, 34a‧‧‧Cleaning scraper

34‧‧‧The second cleaning member

35‧‧‧The first front cleaning member

36‧‧‧The second front cleaning member

W‧‧‧coated body

x‧‧‧coating solution

Fig. 1 is a schematic explanatory diagram of a coating device using a coating nozzle cleaning device according to an embodiment of the present invention.

Fig. 2 shows that in the above-mentioned coating device, the coating nozzle is moved over the object to be coated installed on the table, and the coating liquid is discharged from the slit-shaped outlet provided on the front end surface of the coating nozzle. It is a schematic explanatory diagram of a state in which a coating liquid is sprayed out and applied to the surface of the object to be coated.

Fig. 3 shows that in the above-mentioned coating device, the coating nozzle is moved above the object to be coated installed on the table, and the coating liquid is discharged from the slit-shaped outlet provided on the front end surface of the coating nozzle. A schematic explanatory diagram of a state in which the coating liquid is discharged and applied to the entire surface of the object to be coated.

Fig. 4 shows a state in which the coating liquid remains at the front end of the coating nozzle after the coating liquid is applied to the surface of the object to be coated in the coating device, and (A) is a schematic side view of the coating nozzle , (B) is a schematic sectional view of a coating nozzle.

Fig. 5 shows that in the cleaning device of the coating nozzle of the above-mentioned embodiment, the coating nozzle in the state where the coating liquid remains at the front end is guided to the position of the first cleaning member in the cleaning device, and then It is a schematic explanatory diagram of a state where the tip portion of the coating nozzle in a state where the coating liquid remains is installed in the cleaning scraper portion of the first cleaning member.

Fig. 6 shows that in the cleaning device of the coating nozzle according to the above-mentioned embodiment, the first cleaning member and the first front end surface cleaning member are arranged along the length of the front end of the coating nozzle in a state where the coating liquid remains. The state of cleaning the front end of the coating nozzle by moving sideways, (A) shows that the first cleaning member and the first front end surface cleaning member are moved toward the front end of the coating nozzle in a state where the coating liquid remains The schematic explanatory diagram of the state, (B) shows that the first cleaning member and the first front end surface cleaning member are moved along the front end of the coating nozzle to clean and remove the residue remaining on the front end of the coating nozzle. In the case of the coating liquid, there is a schematic explanatory diagram showing a state where a part of the removed coating liquid adheres to the first cleaning member or the first front end surface cleaning member.

Fig. 7 is a view showing the coating nozzle cleaned by the first cleaning member and the first front end surface cleaning member from the first cleaning member in the cleaning device in the cleaning device of the coating nozzle according to the above-mentioned embodiment. It is a schematic explanatory diagram of the state where the position is guided to the position of the second cleaning member, and then the tip of the coating nozzle is inserted into the cutout of the cleaning scraper part of the second cleaning member.

Fig. 8 shows that in the cleaning device of the coating nozzle according to the above-mentioned embodiment, the second cleaning member and the second front end surface cleaning member are moved toward the first cleaning along the long side direction of the front end of the coating nozzle. member and the first front end face cleaning member move in the opposite direction to clean the front end of the coating nozzle, (A) shows the coating nozzle after cleaning by the first cleaning member and the first front end face cleaning member A schematic explanatory diagram of a state in which the second cleaning member and the second front end cleaning member are moved in the opposite direction to the first cleaning member and the first front cleaning member, (B) is a schematic illustration showing that the aforementioned second cleaning Schematic explanatory diagram of the state after the member and the second front end surface cleaning member move along the front end of the coating nozzle in the opposite direction to the first cleaning member and the first front end surface cleaning member to further clean the front end of the coating nozzle .

Fig. 9 shows that in the coating nozzle cleaning device of the above-mentioned embodiment, the coating solution remaining at the tip of the coating nozzle after several times of use is cleaned from the tip of the coating nozzle, Cleaning the coating tube by moving the first cleaning member and the first front end surface cleaning member in a state where a part of the coating liquid has been removed are moved along the longitudinal direction of the front end portion of the coating nozzle in a state where the coating liquid remains. After the front end of the nozzle, make the aforementioned 2nd cleaning member and the 2nd front end face cleaning member relative to the front end of the aforementioned coating nozzle to which the coating liquid remaining on the 1st cleaning member or the 1st front end face cleaning member adheres. The state in which the front end of the coating nozzle is moved in the direction opposite to the first cleaning member and the first front end surface cleaning member in the longitudinal direction to clean and remove the coating liquid remaining on the front end of the coating nozzle, (A) It is a schematic explanatory diagram showing a state in which the first cleaning member and the first front end surface cleaning member are moved toward the front end portion of the coating nozzle in a state where the coating liquid remains, and (B) is a diagram showing a state in which the first cleaning member is moved When the cleaning member and the first front end surface cleaning member move along the front end portion of the coating nozzle to clean and remove the coating liquid remaining on the front end portion of the coating nozzle, there may be residues on the first cleaning member or the first front end surface. The schematic explanatory drawing of the state where the coating solution of the cleaning member adheres and remains on the front end of the coating nozzle, (C) shows that the second cleaning member and the second front end surface cleaning member are directed toward the first cleaning member and the second cleaning member. 1 is a schematic explanatory diagram of a state in which the front end of the coating nozzle with a part of the coating liquid remaining after cleaning by the front end surface cleaning member moves in the opposite direction to the first cleaning member and the first front end surface cleaning member, and (D) shows The second cleaning member and the second front end surface cleaning member are moved along the front end portion of the coating nozzle toward the opposite direction of the first cleaning member and the first front end surface cleaning member to clean and remove the dust from the first cleaning member and the first cleaning member. 1 is a schematic explanatory diagram of the state after the front end surface cleaning member adheres to the coating liquid at the front end portion of the coating nozzle.

Hereinafter, a cleaning device for a coating nozzle according to an embodiment of the present invention will be specifically described based on the attached drawings. In addition, the cleaning device of the coating nozzle of this invention is not limited to what is shown in the following embodiment, It can change suitably in the range which does not change the gist of invention, and can implement.

Here, in this embodiment, as shown in FIG. 1 , the object to be coated W such as a glass plate is installed above the table 11 in the desktop coater 10, and the coating nozzle 20 is installed on The traveling member 13 that travels above the object to be coated W installed in the above-mentioned manner is moved by the rail 12 , and the nozzle 20 for coating is advanced above the object to be coated W by the traveling member 13 .

Next, the coating liquid x is discharged onto the surface of the object W to be coated from the coating nozzle 20 to coat the surface of the object W to be coated W with the coating liquid x.

Here, when using the coating nozzle 20 to coat the coating liquid x on the surface of the object W to be coated as described above, as shown in FIG. 2, the coating nozzle 20 is used: The elongated front end surface 21 extending in a direction perpendicular to the traveling direction of the nozzle 20 and facing the object to be coated W is provided with a slit-shaped discharge port 22 for discharging the coating liquid x to the surface of the object to be coated W, and On both sides of the front end surface 21, there are provided V-shaped labial arch slopes 23 that expand upward in a sloped shape to form a substantially V-shaped front end.

Next, the coating liquid x contained in the coating liquid supply container (not shown) is supplied to the manifold 24 provided inside the coating nozzle 20, and the coating liquid x supplied to the manifold 24 is guided The coating liquid x is then discharged from the discharge port 22 to the surface of the object W to be coated and the coating liquid x is coated on the surface of the body W to be coated.

Next, the coating liquid x is discharged from the slit-shaped discharge port 22 provided on the front end surface 21 of the coating nozzle 20 to the surface of the object W to be coated as described above, and the coating tube is moved by the traveling member 13. The nozzle 20 travels above the object W to be coated, and applies the coating liquid x to the entire surface of the object W to be coated, as shown in FIG. 3 .

Also, in the above-mentioned desktop type coater 10, the coating liquid x is discharged from the slit-shaped discharge port 22 provided on the front end surface 21 of the coating nozzle 20 to the surface of the object W to be coated as described above, and at the same time When the coating nozzle 20 is advanced to apply the coating liquid x to the entire surface of the object W to be coated, a part of the coating liquid x discharged from the discharge port 22 adheres as shown in FIG. and remain at the tip of the coating nozzle 20 .

Therefore, the cleaning of this embodiment is to remove the coating liquid x remaining at the tip of the coating nozzle 20 after coating the coating liquid x on the surface of the object W to clean the tip of the coating nozzle 20. The device 30 is installed above the table 11 on the downstream side in the traveling direction of the coating nozzle 20 from the position of the object W after the coating nozzle 20 is advanced to apply the coating liquid x to the object W.

Here, in the cleaning device 30, the guide rail 31 extending in a direction perpendicular to the aforementioned traveling direction is provided above the table 11 on the downstream side of the coating nozzle 20 in the traveling direction relative to the object to be coated W, And above the cleaning mobile table 32 that reciprocates above the guide rail 31, a first cleaning member 33 and a second cleaning member 34 are provided with a required interval in the direction of travel of the coating nozzle 20 as a purpose. The cleaning member for removing the coating liquid x remaining at the tip of the coating nozzle 20 is provided on the first cleaning member 33 and the second cleaning member 34 respectively with a shape corresponding to the shape of the tip of the coating nozzle 20. The cleaning scrapers 33a, 34a of the notch of the shape, and make the above-mentioned first cleaning member 33 and the second cleaning member 34 move back and forth in the longitudinal direction of the nozzle 20 for coating, that is, the moving table 32 for cleaning. It is set to incline in the opposite direction among the directions. In addition, in this cleaning device 30 , the first cleaning member 33 and the second cleaning member 34 are each inclined in the directions in which they move when cleaning the tip portion of the coating nozzle 20 .

Also, here, with regard to the cleaning scraper parts 33a, 34a, although it is described as an integral member provided with a cutout corresponding to the shape of the front end part of the coating nozzle 20, other parts can also be used respectively. A member (not shown) is used to scrape off the left and right slopes of the V-shaped labial slope 23 at the front end of the coating nozzle 20 .

In addition, in the cleaning device 30, in order to reliably remove the coating liquid x remaining on the front end surface of the coating nozzle 20 after the coating liquid x is applied to the surface of the object W to be coated from the slit-shaped discharge port 22, The front end portion of the nozzle 20 for cleaning and coating is located on the opposite side to the inclination direction of the first cleaning member 33 which is inclined as described above, and the cleaning device is provided so as to be inclined in the same direction as the first cleaning member 33. There is the first front end surface cleaning member 35 of the front end surface 21 of the coating nozzle 20 of the discharge port 22, and at a position opposite to the inclination direction of the second cleaning member 34, facing the same direction as the second cleaning member 34. The second front end surface cleaning member 36 for cleaning the front end surface 21 of the coating nozzle 20 provided with the discharge port 22 is provided in an inclined direction.

Here, the coating liquid x remaining on the front end portion of the coating nozzle 20 after the coating liquid x is applied to the surface of the object W to be coated as described above is cleaned from the coating nozzle 20 by the cleaning device 30 . When cleaning the front end of the coating nozzle 20 by removing the front end, first, as shown in FIG. 20, guide to the first cleaning member 33 above the cleaning mobile table 32 above the cleaning device 30, and the front end of the coating nozzle 20 is embedded in the cleaning scraper 33a of the first cleaning member 33 .

Next, in the state where the front end portion of the coating nozzle 20 is embedded in the cleaning scraper portion 33a provided on the first cleaning member 33, as shown in Fig. 6 (A) and (B), the aforementioned The cleaning scraper portion 33a of the first cleaning member 33 and the front end surface of the first front end surface cleaning member 35 are in contact with the front end portion of the coating nozzle 20, and the cleaning moving table 32 moves from the coating nozzle 20 One end side in the longitudinal direction of the first cleaning member 33 and the first front end face cleaning member 35 move toward the other end side in the longitudinal direction of the coating nozzle 20, and the first cleaning member 33 and the first front end The surface cleaning member 35 removes the coating liquid x remaining at the tip of the coating nozzle 20 from the tip of the coating nozzle 20 . In addition, when the coating liquid x remaining at the front end of the coating nozzle 20 is removed by the first cleaning member 33 and the first front end surface cleaning member 35 in this way, when the viscosity of the coating liquid x is high, sometimes Part of the coating liquid x removed from the tip of the coating nozzle 20 adheres to the first cleaning member 33 or the first front end surface cleaning member 35, or a part of the coating liquid x partially remains on the tip of the coating nozzle 20. and so on.

Next, move the cleaning moving table 32 to the other end side of the coating nozzle 20 in the longitudinal direction as described above, and use the first cleaning member 33 and the first front end surface cleaning member 35 to clean the surface of the coating nozzle 20. The coating nozzle 20 after the coating liquid x is removed from the front end is moved from the position of the first cleaning member 33 provided above the moving table 32 for cleaning to the position of the second cleaning member 34 as shown in FIG. 7 , and then The tip portion of the coating nozzle 20 is fitted into the cleaning scraper portion 34 a provided on the second cleaning member 34 .

Next, in the state where the front end portion of the coating nozzle 20 is embedded in the cleaning scraper portion 34a of the second cleaning member 34, as shown in Fig. 8 (A) and (B), the aforementioned In the second cleaning member 34, the cleaning scraper portion 34a and the front end surface of the second front cleaning member 36 are in contact with the front end of the coating nozzle 20, and the cleaning moving table 32 is moved in the opposite direction to move from the front to the front. The other end side in the longitudinal direction of the moved coating nozzle 20 is returned to the one end side in the longitudinal direction of the coating nozzle 20 toward the inclination direction of the second cleaning member 34 and the second front end surface cleaning member 36, and the coating nozzle 20 is moved to the other end side in the longitudinal direction. 2. The cleaning member 34 and the second front end surface cleaning member 36 remove the coating liquid x remaining on the tip portion of the coating nozzle 20 from the tip portion of the coating nozzle 20. In this way, after cleaning the tip portion of the coating nozzle 20 where the coating solution x remains with the first cleaning member 33 and the first front end surface cleaning member 35, the second cleaning member 34 and the second front end surface cleaning member 36 are used to clean the tip portion. If cleaning is performed, the coating liquid x in the front end portion of the coating nozzle 20 can be sufficiently removed.

Also, in the case where the front end portion of the coating nozzle 20 with the coating liquid x remaining is cleaned several times as described above, when the first cleaning member 33 and the first front end surface cleaning member 35 are used to clean the coating liquid x Part of the coating liquid x removed by the tip of the nozzle 20 adheres to and accumulates on the first cleaning member 33 or the first front end surface cleaning member 35, and the coating liquid accumulated on the first cleaning member 33 and the first front end surface cleaning member 35 When the amount of x gradually increases and becomes more, then as shown in Fig. 9 (A) and (B), the cleaning in the first cleaning member 33 uses the scraping portion 33a and the front end of the first front end surface cleaning member 35. The surface is in contact with the front end of the coating nozzle 20, and the cleaning mobile table 32 is moved from one end side of the coating nozzle 20 in the longitudinal direction to the other end side of the coating nozzle 20 in the longitudinal direction, and the 1 When the cleaning member 33 and the first front end surface cleaning member 35 remove the coating solution x remaining at the front end of the coating nozzle 20 from the front end of the coating nozzle 20, it is accumulated in the first cleaning member 33 or the first front end. The coating solution x of the surface cleaning member 35 adheres again to the tip of the coating nozzle 20 , so that the amount of the coating solution x remaining at the tip of the coating nozzle 20 increases. Therefore, if coating is performed using such a coating nozzle 20 as it is in such a state, poor coating will occur.

Again, in Fig. 9 (A), when making the cleaning scraper part 33a among the first cleaning member 33 and the front end face of the first front end surface cleaning member 35 contact with the front end portion of the coating nozzle 20, as shown in the figure As shown, the coating solution x accumulated on the first cleaning member 33 or the first front end surface cleaning member 35 may reattach to the upstream side of the moving table 32 in the moving direction for cleaning and remain in the coating nozzle 20 as it is. Front end face 21 and lip arch slope 23 .

On the other hand, in the present embodiment, as described above, the coating nozzle 20 after being cleaned by the first cleaning member 33 and the first front end surface cleaning member 35 is moved to the position of the second cleaning member 34, and as described in the first 9 (C), shown in (D), make the cleaning scraper 34a among the 2nd cleaning member 34 and the front end face of the 2nd front end surface cleaning member 36 contact with the front end portion of the aforementioned coating nozzle 20, and then Move the cleaning moving table 32 in the opposite direction and return to the coating pipe from the other end side in the longitudinal direction of the previously moved coating nozzle 20 toward the inclined direction of the second cleaning member 34 and the second front end surface cleaning member 36. One end side in the longitudinal direction of the nozzle 20, therefore, the aforementioned coating liquid x adhering to and remaining on the front end face 21 or the labial arch slope 23 of the coating nozzle 20 can be cleaned by the second cleaning member 34 and the second front end face cleaning member 36. It is sufficiently removed from the front end of the coating nozzle 20 .

As a result, even if the coating liquid x accumulated in the first cleaning member 33 or the first front end surface cleaning member 35 adheres to the front end of the coating nozzle 20 again, the coating liquid x remaining at the front end of the coating nozzle 20 When the amount of the coating liquid x becomes large, the coating solution x in the tip portion of the coating nozzle 20 can be surely removed to sufficiently clean the tip portion of the coating nozzle 20 .

In addition, when moving the nozzle 20 for coating from the first cleaning member 33 to the position of the second cleaning member 34, the present embodiment lifts and moves the nozzle 20 for coating. The first cleaning member 33 or the second cleaning member 34 moves.

Also, although the foregoing embodiment has been described as cleaning the front end of the coating nozzle 20 after coating the coating liquid x on the surface of the object to be coated W, in the case of continuously performing this operation, it is also possible to clean the coating liquid x after applying the coating liquid x to the surface of the object W. Before coating on the surface of the object W to be coated, the tip of the coating nozzle 20 is cleaned.

20‧‧‧Nozzle for coating

21‧‧‧front face

23‧‧‧Lip arch slope

31‧‧‧guiding track

32‧‧‧Mobile platform for cleaning

33‧‧‧The first cleaning member

34‧‧‧The second cleaning member

35‧‧‧The first front cleaning member

36‧‧‧The second front cleaning member

x‧‧‧coating solution

Claims (4)

A cleaning device for a coating nozzle, which uses a coating nozzle formed to be long in a direction intersecting a direction of travel above an object to be coated, and at the front end of the coating nozzle facing the object to be coated The surface is provided with a slit-shaped discharge port for discharging the coating liquid along the longitudinal direction of the coating nozzle, and the coating nozzle is moved above the object to be coated and the coating liquid is discharged from the slit-shaped discharge port. After coating the coating liquid on the surface of the object to be coated, the cleaning member moving below the coating nozzle along the front end of the coating nozzle removes the residue remaining on the coating nozzle provided with a slit-shaped discharge port. Cleaning the front end of the nozzle for coating with the coating liquid including the front end of the front end surface, wherein: the front end of the nozzle for coating is provided with a required interval in the direction of travel of the nozzle for coating The first cleaning member and the second cleaning member of the cleaning scraping part corresponding to the shape of the cleaning member are used as the cleaning member, and the first cleaning member and the second cleaning member are directed from the bottom of the coating nozzle to the coating nozzle. The front end portion of the coating nozzle is inclined in the opposite direction with respect to the longitudinal direction of the coating nozzle, and the cleaning scraper portion of the first cleaning member and the second cleaning member is arranged along the front end portion of the coating nozzle. The first cleaning member and the second cleaning member sequentially move in opposite directions along the front end of the coating nozzle, respectively, to clean the front end of the coating nozzle. The cleaning device for coating nozzles as described in claim 1, wherein the first cleaning member and the second cleaning member are moved from the aforementioned first cleaning member and the second cleaning member to the direction of movement when cleaning the front end of the coating nozzle. The lower side of the coating nozzle is inclined toward the front end portion of the coating nozzle. The cleaning device for coating nozzles as described in claim 1 or 2, wherein a device for cleaning coating nozzles provided with slit-shaped discharge ports is provided on the downstream side of the moving direction of the first cleaning member. The first front end cleaning member of the front end, and the second front end cleaning member for cleaning the front end of the coating nozzle provided with the slit-shaped discharge port is provided on the moving direction downstream side of the second cleaning member. The coating nozzle cleaning device according to claim 1 or 2, wherein when the front end of the coating nozzle is cleaned by the first cleaning member and the second cleaning member, the coating nozzle is It is installed so as to be able to move up and down relative to the first cleaning member and the second cleaning member, and guide the front end portion of the coating nozzle into the cleaning scraper portion of the first cleaning member, and use the first cleaning member 1. The cleaning member cleans the front end of the coating nozzle, and then guides the front end of the coating nozzle into the cleaning scraper portion of the second cleaning member, and cleans the coating nozzle with the second cleaning member. front end.

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