KR20080044144A - Discharge nozzle washing apparatus - Google Patents

Abstract

A discharge nozzle washing apparatus is provided to reduce a running cost by reducing an amount of consumption of washing solution. A discharge nozzle washing apparatus includes a rotating roller(11), a blade(12), and a washing brush(12b). A coating solution is discharged through a discharge hole of a discharge nozzle. The rotating roller holds the discharged coating solution. The rotating roller is spaced apart from the discharge nozzle not to contact with the discharge nozzle. The blade is installed in an axial direction of the rotating roller in a state that it contacts with a peripheral surface of the rotating roller, and removes the coating solution. A washing brush is installed in an axial direction of the rotating roller. A washing solution supply device is installed in a downstream side of a rotating direction of the rotating roller, and supplies washing solution to a peripheral surface of the rotating roller. The blade and the washing brush reciprocate in the axial direction of the rotating roller.

Description

Dispensing nozzle cleaning device {DISCHARGE NOZZLE WASHING APPARATUS}

BRIEF DESCRIPTION OF THE DRAWINGS The schematic explanatory drawing which showed the state which led the discharge nozzle to the upper side of the rotating roller in the cleaning apparatus of the discharge nozzle in the reference embodiment of this invention after application | coating work.

Fig. 2 is a cleaning device for a discharge nozzle in the same reference embodiment, wherein a blade for removing a coating liquid held on an outer circumferential surface of a rotating roller is brought into contact with the outer circumferential surface of a rotating roller to reciprocate in the axial direction of the rotating roller. Schematic explanatory drawing which showed the state.

Fig. 3 is a reciprocating movement of the coating liquid discharged from the discharge port of the discharge nozzle to the outer circumferential surface of the rotating roller in contact with the outer circumferential surface of the rotating roller in the cleaning apparatus of the discharge nozzle in the same reference embodiment. Explanatory drawing which showed the state removed from the rotating roller by the blade to make.

In the cleaning apparatus of the discharge nozzle in the same reference embodiment, FIG. 4 raises a discharge nozzle, isolates it from the outer peripheral surface of a rotating roller, and raises a washing tank with a lifting device, and raises the lower part of a rotating roller to a washing tank. Schematic explanatory drawing which showed the state immersed in the received washing liquid.

5 is a schematic explanatory diagram of a modification in which a brush member is provided in a cleaning tank in which a cleaning liquid is housed in the cleaning device of a discharge nozzle in the same reference embodiment.

Fig. 6 is a schematic explanatory diagram of a modification in which a cleaning liquid jet nozzle for supplying a cleaning liquid to an outer circumferential surface of a rotating roller is provided in a cleaning tank in the cleaning device of a discharge nozzle in the same reference embodiment.

Fig. 7 is a cleaning device for a discharge nozzle in an embodiment of the present invention, in which a cleaning liquid supply nozzle and a cleaning brush are made to reciprocate in the axial direction of a rotating roller together with a blade so as to be downstream from the blade in a rotational direction. And a schematic illustration of a modification in which a second brush is provided.

FIG. 8 is a partially enlarged explanatory diagram of a modification shown in FIG. 7. FIG.

[Explanation of symbols on the main parts of the drawings]

11: rotary roller 12: blade

12a: cleaning liquid supply nozzle 12b: cleaning brush

12c: Second blade 13: Drive device 14: Cleaning liquid 15: Cleaning tank 16: Lifting device 17: Recovery tank 18: Cleaning liquid injection nozzle 19: Brush member

20: discharge nozzle 21: discharge port

22: coating liquid

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning apparatus for a discharge nozzle used for cleaning a discharge nozzle provided in a coating apparatus for coating various coating liquids on various coated objects such as glass, a resin film, and a metal foil. .

Particularly, after applying the coating liquid to the object to be coated from the slit-shaped discharge port provided at the distal end of the discharge nozzle, the coating liquid is applied, and then the discharge nozzle is configured to clean the distal end of the discharge nozzle provided with the discharge port until the next application. It relates to a cleaning device of.

Conventionally, in manufacturing a plasma display panel, an organic electroluminescence (EL) display panel, a liquid crystal display panel, etc., various coating objects, such as glass, a resin film, and a metal foil, are apply | coated according to a coating apparatus. Each coating liquid is apply | coated.

In general, as such a coating device, a coating liquid is supplied to the object to be coated from a slit-shaped discharge port provided at the tip of the discharge nozzle.

Here, in the coating device as described above, when the coating liquid is applied by sequentially supplying a coating liquid from the discharge nozzle to a plurality of objects to be coated, the distal end portion of the discharge nozzle during the waiting time between the coating operation and the coating operation is applied. The coating liquid existing in was dried, and the concentration thereof increased.

When the next coating operation is performed while the concentration of the coating liquid present in the discharging nozzle tip is increased in this manner, a stripe-shaped coating unevenness occurs on the object to be coated by the highly concentrated coating liquid, There was a problem such as breaking.

For this reason, conventionally, as shown in Japanese Patent Laid-Open No. 2001-310147, a part of the rotating roller is immersed in the cleaning liquid contained in the cleaning tank, and before the next coating operation is performed, the outer peripheral surface of the rotating roller protruding from the cleaning liquid is applied. The discharge nozzle provided with the slit-shaped discharge port is approached, and the coating liquid is discharged from the discharge hole of the discharge nozzle, so that the highly concentrated coating liquid is supplied to the outer circumferential surface of the rotating roller, and the highly concentrated coating liquid is supplied. While removing from the distal end of the discharge nozzle, the cleaning liquid is ejected from the shower nozzle to the outer circumferential surface of the rotating roller supplied with the coating liquid, the coating liquid held on the outer circumferential surface of the rotating roller is removed, and the coating liquid and the cleaning liquid thus removed are removed. The outer circumferential surface of the rotating roller is accommodated in the cleaning tank and circulated with the liquid including the coating liquid and the cleaning liquid contained in the cleaning tank. It has been proposed to to injection.

However, in the case where the cleaning liquid is ejected from the shower nozzle to the outer circumferential surface of the rotating roller supplied with the coating liquid and the coating liquid is removed from the outer circumferential surface of the rotating roller, in order to sufficiently remove the coating liquid present on the outer circumferential surface of the rotating roller, Since a large amount of new washing liquid sprayed from the shower nozzle was required, the running cost was very high, and the treatment of the washing liquid after washing was a problem.

In addition, when circulating the liquid containing the coating liquid and the cleaning liquid contained in the cleaning tank and spraying the liquid on the outer circumferential surface of the rotating roller, it becomes difficult to sufficiently remove the coating liquid existing on the outer circumferential surface of the rotating roller. In order to purify and circulate the contained liquid, facilities such as a purifier are required, resulting in various problems such as an increase in cost and an increase in size of the apparatus.

In addition, as shown in Japanese Patent Laid-Open No. 2004-167476, a new circulating fluid shower nozzle for ejecting a cleaning liquid circulated on the outer circumferential surface of a rotating roller supplied with a coating liquid or a new cleaning liquid is sprayed on the outer circumferential surface of a rotating roller. A cleaning apparatus is also proposed in which a blade, a brush roller, or the like, which comes into contact with an outer circumferential surface of a new liquid shower nozzle and a rotating roller, is placed to scrape off and adhere to a coating liquid.

However, such a cleaning apparatus requires a large number of devices to sufficiently remove the coating liquid supplied to the outer circumferential surface of the rotating roller, and increases the cost and increases the size of the apparatus. Also in this case, the new liquid In order to always inject new washing | cleaning liquid from the shower nozzle to the outer peripheral surface of a rotating roller, many washing | cleaning liquids were needed, running cost became high, and the process of the washing liquid after washing was a problem.

The present invention is applied to a coating device by sequentially supplying a coating liquid from a slit-shaped discharge port at a distal end of a discharge nozzle to a coated object, wherein the coating liquid is discharged from the discharge port of the discharging nozzle end before performing the next coating operation. Is supplied to the outer circumferential surface of the rotating roller and the coating liquid supplied to the outer circumferential surface of the rotating roller is removed efficiently with a simple facility without using a large amount of cleaning liquid. It is also possible to achieve a problem that the unevenness of the stripe pattern does not occur on the outer circumferential surface of the rotating roller, and that the coating liquid present at the distal end of the discharge nozzle is always appropriately performed.

In the present invention, in order to solve the problems as described above, in the cleaning device of the discharge nozzle for cleaning the tip of the discharge nozzle provided with a slit discharge port for supplying the coating liquid to the coated object, the discharge port of the discharge nozzle A rotary roller holding the coating liquid discharged from the outer peripheral surface at regular intervals so as not to contact the discharge nozzle, and a blade for removing the coating liquid held on the outer peripheral surface of the rotary roller contacting the outer peripheral surface of the rotating roller. And the reciprocating movement in the axial direction of the rotary roller, and at the position downstream of the rotational direction of the rotary roller than the blade, the reciprocating movement in the axial direction of the rotary roller in contact with the outer peripheral surface of the rotary roller with the blade A cleaning liquid ball for installing a cleaning brush to supply a cleaning liquid to an outer circumferential surface of the rotating roller; In the step of installing the apparatus on the downstream side in the rotational direction of the rotary roller rather than the cleaning brush, and removing the coating liquid discharged from the discharge port of the discharge nozzle and held on the outer circumferential surface of the rotary roller with a blade, the cleaning liquid supply device is connected to the rotary roller. While the cleaning liquid is not supplied, at least the cleaning liquid is supplied from the cleaning liquid supply device to the rotary roller so that the blade and the cleaning brush contacted with the outer circumferential surface of the rotating roller are reciprocated in the axial direction of the rotary roller.

Further, in the cleaning device for the discharge nozzle according to the present invention, even when the coating liquid discharged from the discharge port of the discharge nozzle is held on the outer circumferential surface of the rotating roller, the blade and the cleaning brush are placed on the outer circumferential surface of the rotating roller. It is preferable to reciprocate in the axial direction of the rotating roller in the contacted state.

Moreover, in the washing | cleaning apparatus of the discharge nozzle in this invention, a rotating roller is in the state which contacted the outer peripheral surface of a rotating roller with the said blade and a cleaning brush at the position downstream of the rotation direction of a rotating roller rather than the said cleaning brush. It is preferable to provide a second blade that reciprocates in the axial direction, or to provide a cleaning liquid supply nozzle for supplying a cleaning liquid to the outer circumferential surface of the rotary roller between the blade and the cleaning brush.

Moreover, in the washing | cleaning apparatus of the discharge nozzle in this invention, as a washing | cleaning liquid supply apparatus which supplies a washing | cleaning liquid to the outer peripheral surface of the said rotating roller, the washing tank which accommodated the washing | cleaning liquid was provided so that a movement was possible, and it is discharged from the discharge port of a discharge nozzle. In the step of removing the coating liquid held on the outer circumferential surface of the rotating roller with a blade, the rotating roller is not immersed in the cleaning liquid contained in the cleaning tank and the cleaning tank is moved to prevent the cleaning liquid from being supplied to the rotating roller, and to the outer circumferential surface of the rotating roller. When supplying the cleaning liquid, it is possible to move the cleaning tank so that the rotary roller is immersed in the cleaning liquid contained in the cleaning tank.

Moreover, when immersing a rotary roller in the washing | cleaning liquid accommodated in the washing tank in this way, it is preferable to make a brush member in a washing tank by making it contact with the outer peripheral surface of this rotating roller.

Other objects, features and advantages of the present invention will become apparent from the description of the preferred embodiments described in detail below with reference to the accompanying drawings.

Best Mode for Carrying Out the Invention

Embodiment

EMBODIMENT OF THE INVENTION Hereinafter, the discharge nozzle which concerns on embodiment of this invention which improved the washing | cleaning apparatus of the discharge nozzle which concerns on the reference embodiment of this invention based on an accompanying drawing, and then further improved this. Will be described in detail below.

In addition, the washing | cleaning apparatus of the discharge nozzle which concerns on this invention is not limited to what was shown to the following embodiment, It can change suitably and can implement in the range which does not change the summary of this invention.

In the cleaning device of the discharge nozzle according to the reference embodiment, as shown in FIGS. 1 to 4, the blades are brought into contact with the outer circumferential surface of the rotating roller 11 that is rotationally driven by a rotating device (not shown). 12) being installed. In a state where the blade 12 is in contact with the outer circumferential surface of the rotary roller 11, as shown in Fig. 2, the blade 12 is driven by a drive device 13 such as a cylinder, a motor, or the like. It can be reciprocated in the axial direction.

In addition, a cleaning tank 15 containing the cleaning liquid 14 as a cleaning liquid supply device is provided at a position downstream from the blade 12 in the rotational direction of the rotary roller 11, and the cleaning tank 15 is placed in a cylinder or the like. In the state where the washing tank 15 is lifted by the elevating device 16, as shown in FIG. It is made to be immersed in the washing | cleaning liquid 14 accommodated in the tank 15.

Next, the case where the front-end | tip part of the discharge nozzle 20 is wash | cleaned using the washing | cleaning apparatus of the discharge nozzle in this reference embodiment is demonstrated.

First, the coating liquid 22 is supplied to the object to be coated (not shown) from the slit-shaped discharge port 21 provided at the distal end of the discharge nozzle 20 to perform application, and as shown in FIG. Guide the nozzle 20 upwards of the rotary roller 11. Here, if the coating liquid 22 is left at the distal end of the discharge nozzle 20 and the coating liquid 22 is dried and the concentration is increased, the next coating operation is performed. As a result, streaked coating unevenness may occur or the film may be broken.

In the cleaning device of this discharge nozzle, as shown in FIG. 3, the discharge nozzle 20 is lowered, and the tip end of the discharge nozzle 20 is made to approach the outer circumferential surface of the rotary roller 11 to discharge the discharge nozzle 20. The tip end of the nozzle 20 and the outer circumferential surface of the rotary roller 11 are set at regular intervals, usually in the range of 30 µm to 500 µm.

Then, the rotary roller 11 is rotated by the rotary device, and as shown in FIG. 2, the rotary roller 11 is rotated by the drive device 13 in contact with the outer circumferential surface of the rotary roller 11. The roller 11 is reciprocated in the axial direction.

Moreover, in this state, the said washing tank 15 which accommodated the washing | cleaning liquid 14 is hold | maintained in the state which was lowered by the said lifting device 16, and the lower part of the rotating roller 11 is accommodated in the washing tank 15, It does not immerse in the washing | cleaning liquid 14 which exists.

In the above state, the coating liquid 22 is preliminarily discharged from the slit-shaped discharge port 21 provided at the distal end of the discharge nozzle 20, and the coating liquid 22 remaining at the distal end of the discharge nozzle 20. ) Is supplied to the outer circumferential surface of the rotating roller 11, the coating liquid 22 held on the outer circumferential surface of the rotating roller 11 is guided by the rotating roller 11 to the position of the blade 12, and the rotating roller The coating liquid 22 is removed from the outer circumferential surface of the rotating roller 11 by the blade 12 reciprocating in the axial direction of the rotating roller 11 while being in contact with the outer circumferential surface of the 11. 17).

In this case, a part of the coating liquid 22 held on the outer circumferential surface of the rotary roller 11 is dried to form a high viscosity mass, which is formed on the outer circumferential surface of the rotary roller 11 at the position of the blade 12. Even if it remains, since the blade 12 reciprocates in the axial direction of the rotary roller 11, the lump-like coating liquid 22 is easily peeled off from the outer circumferential surface of the rotary roller 11.

As a result, this lump-shaped coating liquid 22 is separated from the outer peripheral surface of the rotating roller 11 with the normal coating liquid 22, and is collect | recovered in the collection tank 17, and the rotating roller 11 The occurrence of streaks in the circumferential direction of the outer circumferential surface is suppressed.

Next, after removing the coating liquid 22 preliminarily discharged from the discharge nozzle 20 from the outer peripheral surface of the rotating roller 11, and recovering it to the collection tank 17, as shown in FIG. The discharge nozzle 20 in the state of approaching the outer circumferential surface of 11 is raised to guide the discharge nozzle 20 to the object to be coated, and then the next coating operation is performed, while the cleaning tank 15 is carried out. ) Is raised by the elevating device 16 so that the lower part of the rotary roller 11 is immersed in the cleaning liquid 14 accommodated in the cleaning tank 15.

Here, when the lower part of the rotating roller 11 is immersed in the washing | cleaning liquid 14 accommodated in the washing tank 15 in this way, the washing | cleaning liquid 14 accommodated in this washing tank 15 is supplied to the outer peripheral surface of the rotating roller 11, The coating liquid 22 remaining slightly on the outer circumferential surface of the rotating roller 11 is easily removed from the outer circumferential surface of the rotating roller 11 by the cleaning liquid 14.

Then, when the cleaning liquid 14 supplied to the outer circumferential surface of the rotary roller 11 is guided to the position of the blade 12 by the rotation of the rotary roller 11, the outer circumferential surface of the rotary roller 11 as described above. By the blade 12 reciprocating in the axial direction of the rotary roller 11 in contact with the rotary roller 11, the cleaning liquid 14 together with the coating liquid 22 remaining slightly on the outer circumferential surface of the rotary roller 11 It is removed from the outer circumferential surface of (11) and is recovered to the recovery tank 17.

Even in this case, even if a part of the coating liquid 22 held on the outer circumferential surface of the rotating roller 11 is dried to form a lump, and this remains on the outer circumferential surface of the rotating roller 11 at the position of the blade 12, Since the blade 12 reciprocates in the axial direction of the rotary roller 11, the lump-like coating liquid 22 is easily peeled from the outer circumferential surface of the rotary roller 11.

The lump-shaped coating liquid 22 is separated from the outer circumferential surface of the rotary roller 11 together with the cleaning liquid 14 by the blade 12 and is recovered to the recovery tank 17. For this reason, generation | occurrence | production of the stripe-shaped unevenness along the circumferential direction of the outer peripheral surface of the rotating roller 11 by the lump-shaped coating liquid 22 is suppressed more, and the outer peripheral surface of the rotating roller 11 becomes a uniform state, Next, even when the front end of the discharge nozzle 20 is cleaned, the outer circumferential surface of the rotary roller 11 is maintained in a uniform state, and the cleaning of the front end of the discharge nozzle 20 is performed properly.

In addition, in the cleaning apparatus of the discharge nozzle, as shown in FIG. 5, the brush member 19 is provided in the washing tank 15 in which the washing liquid 14 is accommodated, and as described above, It is also possible to bring this brush member 19 into contact with the outer circumferential surface of the lower part of the rotary roller 11 immersed in the cleaning liquid 14 stored therein.

And when the brush member 19 contacts the lower outer peripheral surface of the rotating roller 11 immersed in the washing | cleaning liquid 14 in the washing tank 15 in this way, the washing | cleaning liquid 14 was supplied as mentioned above. The outer circumferential surface of the rotary roller 11 is brought into contact with the blade 12 reciprocating in the axial direction of the rotary roller 11, so that the coating liquid 22 remaining on the outer circumferential surface of the rotary roller 11 together with the cleaning liquid 14 When removed from the outer circumferential surface of the rotary roller 11 and recovered by the recovery tank 17, even if a thin coating liquid 22 film not removed by the blade 12 remains on the outer circumferential surface of the rotary roller 11, as described above. The thin coating liquid 22 film is suitably removed from the outer circumferential surface of the rotating roller 11 by the brush member 19.

In addition, in the cleaning apparatus of this discharge nozzle, although the washing | cleaning tank 15 which accommodated the washing | cleaning liquid 14 was used as the washing | cleaning liquid supply apparatus which supplies the washing | cleaning liquid 14 to the outer peripheral surface of the rotating roller 11, FIG. As shown in the figure, it is also possible to provide the cleaning tank 15 with a cleaning liquid jet nozzle 18 for supplying the cleaning liquid 14 to the outer circumferential surface of the rotary roller 11.

And when the cleaning liquid injection nozzle 18 is installed in the cleaning tank 15 in this way, the coating liquid 22 preliminarily discharged from the discharge nozzle 20 as mentioned above is rotated by the rotating roller (blade 12). After removing from the outer circumferential surface of 11), the cleaning liquid 14 is sprayed from the cleaning liquid injection nozzle 18 to the outer circumferential surface of the rotary roller 11 to supply the cleaning liquid 14 to the outer circumferential surface of the rotary roller 11.

Then, the coating liquid 22 remaining on the outer circumferential surface of the rotating roller 11 is recovered as described above from the outer circumferential surface of the rotating roller 11 to the recovery tank 17 together with the cleaning liquid 14, while the cleaning liquid injection nozzle At 18, the cleaning liquid 14, which is sprayed onto the outer circumferential surface of the rotating roller 11 and was not held on the outer circumferential surface of the rotating roller 11, is recovered to the cleaning tank 15.

In addition, in the cleaning apparatus of the discharge nozzle in this embodiment, it adds to the washing | cleaning apparatus of the discharge nozzle of the reference embodiment as mentioned above, and as shown in FIG. 7 and FIG. 8, with the said blade 12, Cleaning liquid supply nozzle which makes the reciprocating movement of the rotating roller 11 axially, and supplies the cleaning liquid 14 to the outer peripheral surface of the rotating roller 11 downstream of the rotating roller 11 rather than the said blade 12 ( 12a), the cleaning brush 12b and the second blade (12b) are brought into contact with the outer circumferential surface of the rotary roller 11 downstream of the rotary roller 11 rather than the cleaning liquid supply nozzle 12a. 12c) is installed.

Here, even in the case where the cleaning liquid supply nozzle 12a, the cleaning brush 12b, and the second blade 12c are provided in addition to the blade 12 in this manner, the coating that has been preliminarily discharged from the discharge nozzle 20 as described above. The liquid 22 is removed from the outer circumferential surface of the rotary roller 11 by the blade 12, and then the lower part of the rotary roller 11 is immersed in the cleaning liquid 14 accommodated in the cleaning tank 15, and this cleaning tank 15 ) Is supplied to the outer peripheral surface of the rotary roller (11).

In the cleaning apparatus of the discharge nozzle of this embodiment, the cleaning liquid supply nozzle 12a, the cleaning brush 12b, and the second blade 12c are rotated together with the blade 12 in the axial direction of the rotary roller 11. The cleaning liquid 14 is supplied to the outer circumferential surface of the rotary roller 11 from the cleaning liquid supply nozzle 12a between the blade 12 and the cleaning brush 12b.

In this way, the coating liquid 22 remaining on the outer circumferential surface of the rotating roller 11 as described above is removed from the outer circumferential surface of the rotating roller 11 together with the cleaning liquid 14 by the blade 12 to recover the recovery tank 17. Although a thin coating liquid 22 film remains on the outer circumferential surface of the rotating roller 11 that is not removed by the blade 12 while being recovered by the blade 12, the cleaning liquid supply nozzle 12a is applied to the thin coating liquid 22 film. The cleaning liquid 14 is supplied from the film, and this thin coating liquid 22 film is appropriately removed from the outer circumferential surface of the rotary roller 11 by the cleaning brush 12b and the second blade 12c together with the cleaning liquid 14. And is recovered to the recovery tank 17.

Further, even if the coating liquid 22 removed from the outer circumferential surface of the rotary roller 11 is attached to the cleaning brush 12b or the second blade 12c, the coating liquid 22 is applied to the cleaning liquid 14. Since it wash | cleans with the cleaning brush 12b or the 2nd blade 12c by this, the coating liquid adhering to the cleaning brush 12b or the 2nd blade 12c does not dry out and becomes a lump shape with high viscosity.

In addition, although the example which used the cleaning brush 12b was shown in the said embodiment, since the surface should have an unevenness | corrugation while having moderate elasticity, even if a sponge or a net | network is used, it will have an equivalent effect. You can get it.

Although the present invention has been sufficiently described in the foregoing embodiments, it should be clearly noted that various changes and modifications can be made by those skilled in the art.

Therefore, it should be considered that such changes and modifications are included in the present invention without departing from the scope of the present invention.

In the cleaning device for the discharge nozzle in the present invention, the coating liquid is discharged from the discharge port of the discharge nozzle to the outer circumferential surface of the rotary roller, and the rotary roller is provided at regular intervals so as not to contact the discharge nozzle. When discharging the coating liquid from the discharge port of the nozzle to the outer circumferential surface of the rotating roller, even if the dry coating liquid powder remains on the outer circumferential surface of the rotating roller, the coating liquid powder is prevented from adhering to the distal end of the discharge nozzle, thereby At the same time, the coating liquid having a higher concentration is appropriately removed, and the coating liquid newly discharged from the discharge port of the discharge nozzle is appropriately retained at the tip of the discharge nozzle.

In the cleaning apparatus of the discharge nozzle according to the present invention, in the step of removing the coating liquid discharged from the discharge port of the discharge nozzle and retained on the outer circumferential surface of the rotary roller by the blade, the blade of the rotary roller is better than the blade. Since the cleaning liquid is not supplied to the rotating roller from the cleaning liquid supply device which is movable in the downstream of the rotational direction, the amount of the cleaning liquid supplied to the rotating roller can be reduced, and the coating liquid held on the outer circumferential surface of the rotating roller is the cleaning liquid. Mixing is suppressed, and the cleaning liquid supplied from the cleaning liquid supply device is kept in a clean state.

As a result, in the cleaning apparatus of the discharge nozzle in the present invention, the consumption amount of the cleaning liquid is reduced, the running cost is reduced, and facilities such as a purification apparatus for purifying the cleaning liquid as in the prior art are provided. Since there is no need, the equipment cost is reduced and the apparatus is not enlarged.

In the cleaning apparatus of the discharge nozzle according to the present invention, as described above, the coating liquid discharged from the discharge port of the discharge nozzle and held on the outer circumferential surface of the rotating roller is removed with a blade and a cleaning brush, and then rotated from the cleaning liquid supply device. Since the cleaning liquid is supplied to the roller, clean cleaning liquid is supplied to the outer circumferential surface of the rotating roller.

Further, in the step of supplying the cleaning liquid from the cleaning liquid supply device to the rotating roller, the cleaning liquid was reciprocated in the axial direction of the rotating roller while the cleaning brush was brought into contact with the outer peripheral surface of the rotating roller. As a result, the coating liquid is easily removed from the outer circumferential surface of the rotating roller, and a thin film of the coating liquid on the outer circumferential surface of the rotating roller that cannot be removed by the blade is also sufficiently removed by the cleaning brush.

Moreover, in the washing | cleaning apparatus of the discharge nozzle in this invention, it is hold | maintained on the outer peripheral surface of a rotating roller as the said blade and the cleaning brush reciprocate in the axial direction of a rotating roller in the state which contacted the outer peripheral surface of a rotating roller. Even if the coating liquid dries to a high viscosity lump, the lump-like coating liquid is easily peeled off from the outer circumferential surface of the rotating roller, and this lump-shaped coating liquid is appropriately removed from the outer circumferential surface of the rotating roller together with the cleaning liquid and rotated. Even when the front end of the next ejection nozzle is cleaned without the occurrence of streaks in the circumferential direction of the outer circumferential surface of the roller, the ejection nozzle front end can be properly cleaned.

Further, in the cleaning device for the discharge nozzle according to the present invention, the blade or the cleaning brush is rotated in contact with the outer circumferential surface of the roller even in a step of discharging the coating liquid from the discharge port of the discharge nozzle to the outer circumferential surface of the rotating roller. When the rollers are reciprocated in the axial direction, the coating liquid held on the outer circumferential surface of the rotating roller is uniformly removed by the blade or the cleaning brush, and streaked spots along the circumferential direction of the outer circumferential surface of the rotating roller are generated. It is further prevented.

Further, when the second blade which reciprocates in the axial direction of the rotating roller is provided at a position downstream from the cleaning brush in the rotational direction downstream of the rotating roller, in contact with the outer peripheral surface of the rotating roller together with the blade and the cleaning brush. The coating liquid removed by the cleaning brush can be recovered by the second blade to suppress the mixing of the coating liquid into the cleaning liquid.

Further, when a cleaning liquid supply nozzle for supplying a cleaning liquid is provided between the blade and the cleaning brush on the rotating roller, and the cleaning liquid is supplied from the cleaning liquid supply nozzle, the coating liquid recovered by the cleaning brush is cleaned. Even if it adheres to, the adhered coating liquid is removed from the cleaning brush by this cleaning liquid, and the applied coating liquid is prevented from being dried in the cleaning brush to form a high viscosity mass.

Further, a cleaning liquid supply device for supplying a cleaning liquid to the outer circumferential surface of the rotating roller, the cleaning tank containing the cleaning liquid is installed to be movable, and the cleaning tank is moved to immerse the rotating roller in the cleaning liquid contained in the cleaning tank to wash the liquid on the outer peripheral surface of the rotating roller. When the brush member is provided in the cleaning tank so as to contact the outer circumferential surface of the rotary roller when supplying, the thin film of the coating liquid on the outer circumferential surface of the rotary roller that cannot be removed by the blade can be removed with this brush member as appropriate. It becomes possible.

Claims (6)

In the cleaning apparatus of the discharge nozzle which cleans the front end of the discharge nozzle in which the slit-shaped discharge port which supplies a coating liquid to a to-be-coated object is provided, The coating liquid discharged from the discharge port of the discharge nozzle is provided at regular intervals so that the rotary roller held on the outer circumferential surface does not come into contact with the discharge nozzle, and a blade for removing the coating liquid held on the outer circumferential surface of the rotary roller is provided with a rotary roller. It is installed so as to reciprocate in the axial direction of the rotary roller in contact with the outer circumferential surface, and at the position downstream of the rotational direction of the rotary roller than this blade, the rotary roller is in contact with the outer circumferential surface of the rotary roller with the blade. A cleaning brush for reciprocating in the axial direction is provided, and a cleaning liquid supply device for supplying the cleaning liquid to the outer circumferential surface of the rotating roller is provided downstream of the rotating roller in the rotational direction than the cleaning brush, and is discharged from the discharge port of the discharge nozzle. In the step of removing by the blade the coating liquid held on the outer circumferential surface of the rotating roller While the cleaning liquid is not supplied from the cleaning liquid supply device to the rotating roller, the cleaning liquid is supplied from the cleaning liquid supply device to the rotating roller at least. The cleaning device of the discharge nozzle, characterized in that the reciprocating movement in the direction. The second and reciprocating motion of the rotary roller in a state in contact with the outer circumferential surface of the rotary roller together with the blade and the cleaning brush at a position downstream of the rotary roller than the cleaning brush. A cleaning device for a discharge nozzle, characterized in that a blade is provided. The cleaning device for a discharge nozzle according to claim 1, wherein a cleaning liquid supply nozzle for supplying a cleaning liquid to an outer circumferential surface of the rotary roller is provided between the blade and the cleaning brush. The method according to claim 1, wherein the blade and the cleaning brush are reciprocated in the axial direction of the rotary roller even in the step of removing the coating liquid discharged from the discharge port of the discharge nozzle and held on the outer circumferential surface of the rotary roller by the blade. The cleaning device of the discharge nozzle, characterized in that. The cleaning device for a discharge nozzle according to claim 1, wherein a cleaning tank in which the cleaning liquid is housed is provided as the cleaning liquid supply device. The cleaning device for a discharge nozzle according to claim 1, wherein a brush member is provided in the cleaning tank so as to contact the outer circumferential surface of the rotating roller when the rotating roller is immersed in the cleaning liquid contained in the cleaning tank.

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