KR20080091000A - Intermittent coating method and intermittent coating device - Google Patents

Abstract

An intermittent coating method and an intermittent coating apparatus are provided to apply a coating solution on a base material at uniform thickness by vertically forming the sections of the application starting and finishing points of a coating solution on the base material. An intermittent coating method applies a coating solution on a base material(1) in uniform thickness in intermittently applying a coating solution(12) on the moving base material from a coating die(10). In starting supplying the coating solution on the base material from the coating die during intermittently supplying the coating solution on the sheet-shaped base material from an ejecting hole(11) installed at a front section(10a) of the coating die, the intermittent coating method executes the steps of: moving the coating die and the base material in the same direction and applying the coating solution on the moving base material from the coating die by stopping moving the coating die or moving the coating die in the reverse direction of the base material. In stopping supplying the coating solution from the coating die to the base material, a step for moving the coating die in the same direction of the base material is executed.

Description

Intermittent coating method and intermittent coating device {INTERMITTENT COATING METHOD AND INTERMITTENT COATING DEVICE}

This application claims the priority based on Japanese Patent Application No. 2007-99952.

This invention intermittently supplies a coating liquid to the sheet-like base material which runs, from the slit-shaped discharge port provided in the front end surface of the coating die, An intermittent coating method and an intermittent coating apparatus which apply | coat an application liquid intermittently to this base material are provided.

In particular, in the intermittent coating method and the intermittent coating device described above, the end face on the coating start side starting the application of the coating liquid to the base material and the end face on the application stop side stopping the application of the coating liquid to the base material It is characterized in that it is formed vertically without being inclined with respect to the substrate, so that the coating liquid can be applied to the substrate at a constant and uniform thickness.

Conventionally, coating liquid is intermittently supplied to the sheet-like base material which travels from the slit-shaped discharge port provided in the front end surface of the die | dye for application, and apply | coating coating liquid to the said base material intermittently.

And when apply | coating an application liquid intermittently to a sheet-like base material in this way, in the past, generally, as shown in FIG. 1, the base material 1 is made to run on the backup roller 2, and to make it run. At the same time, the base 1 running in this way and the front end face 10a of the coating die 10 face each other through the required interval, and the coating die 10 is provided at a position facing the backup roller 2, The coating liquid 12 is intermittently discharged from the slit-shaped discharge port 11 provided on the front end surface 10a of the coating die 10 to apply the coating liquid 12 to the base material 1 intermittently. It is done.

In addition, when discharging the coating liquid 12 intermittently from the slit-shaped discharge opening 11 provided in the front end surface 10a of the coating die 10 as mentioned above, the coating liquid 12 is applied to the coating die 10 The intermittence valve 4 is provided between the pressure feed pump 3 and the application die 10 for pressure feeding to the The discharge port 11 provided intermittently to the die 10 via the resin coating liquid supply pipe 13, and provided in the front end surface 10a of this coating die 10. The coating liquid 12 is intermittently discharged.

However, when discharging the coating liquid 12 intermittently from the discharge port 11 provided in the front end surface 10a of the coating die 10 in this way, the intermittent valve 4 is opened and the coating liquid ( In the application start step of discharging 12) and the application stop step of stopping discharging of the coating liquid 12 by closing the intermittent valve 4, the pressure transfer delay caused by the expansion of the coating liquid supply pipe 13 or the like. Due to the residual pressure or the like, the responsiveness of discharging and stopping of the coating liquid 12 deteriorates. As a result, as shown in FIG. 2, the discharge amount of the coating liquid 12 discharged from the discharge port 11 of the coating die 10 gradually increases in an application | coating start stage, and gradually declines in an application | coating stop stage. Done.

For this reason, when apply | coating the coating liquid 12 to the base material 1 which runs as mentioned above, as shown in FIG. 3, the edge part at the application start side of the coating liquid 12 apply | coated to the base material 1 ( There was a problem that it was not possible to apply the coating liquid 12 to the substrate 1 so that the coating liquid 12 had a constant and uniform thickness.

In recent years, as shown in Japanese Patent Laid-Open No. 2001-179156, a suction valve and a negative pressure tank are provided in a branch pipe provided between the coating die and the intermittent valve. When the application of the coating liquid to the substrate is stopped, the discharge valve is stopped by closing the intermittent valve, and the suction valve is opened to suck the coating liquid into the negative pressure tank, thereby coating the coating liquid. The thing which suppressed application to a base material is proposed.

However, in this publication, the end of the application start side for starting the application of the coating liquid to the substrate cannot be prevented from inclining, and even in the case described above, the response of the suction valve It was not enough, etc., and the edge part on the application stop side was still inclined slightly, and the coating liquid could not be apply | coated with a constant and uniform thickness with respect to the base material.

The present invention is intermittently supplied with a coating liquid from a slit-shaped discharge port provided on a distal end surface of a coating die to a sheet-like substrate to run, and the coating liquid is intermittently applied to the substrate. The problem is to solve the problem.

That is, in this invention, the cross section of the application | coating start side which starts application | coating of the coating liquid to a base material, and the cross section of the application | coating stop side which stops application | coating of the coating liquid to a base material are perpendicular to a base material without inclining. It is set as a subject to be formed, and to make it apply | coat a coating liquid with a fixed uniform thickness with respect to a base material.

In the intermittent coating method of the present invention, in order to solve the above problems, the coating liquid is intermittently supplied to the sheet-like substrate to be driven from the slit-shaped discharge port provided on the distal end surface of the coating die. In an intermittent coating method for applying a coating liquid intermittently, a step of driving the coating die in the same direction as the substrate at the time point of supplying the coating liquid from the coating die to the substrate, and for the coating Stopping the running of the die or driving the coating die in a direction opposite to the substrate to stop the supply of the coating liquid from the coating die to the substrate and to stop the supply of the coating liquid from the coating die to the substrate. At this point in time, the coating die was allowed to have a step of running in the same direction as the base material.

And in this intermittent coating method, when starting supply of the coating liquid from a coating die to a base material as mentioned above, the running speed of the coating die at the start time of supply of a coating liquid is made to be the same speed as the said base material. It is preferable to gradually reduce the traveling speed of the coating die, and to stop the supply of the coating liquid from the coating die to the substrate, and to drive the coating die in the same direction as the substrate. It is preferable to accelerate | stimulate and to make the traveling speed of this coating die be the same speed as the said base material at the time of supply stop of supply of a coating liquid.

In this intermittent coating method, it is preferable that the interval between the base material and the front end face of the die for coating is narrower than the upstream side of the substrate in the running direction at the time of forming a bead.

In this intermittent coating method, the substrate can be run over the backup roller, and the coating liquid can be intermittently applied from the die for application to the substrate at a position facing the backup roller. The application die can be disposed in the radial direction with its front end face facing the backup roller, and in this state, the application die can be driven along the rotational direction of the backup roller.

In addition, in the intermittent coating apparatus of the present invention, in order to solve the above problems, the coating liquid is intermittently supplied to the sheet-like substrate to be driven from the slit-shaped discharge port provided on the front end surface of the die for application. An intermittent coating device for intermittently applying a coating liquid to a substrate, wherein a feeding means for transferring the coating die is provided, the transfer of the coating die by the transferring means is controlled by a control means, and the coating die is applied. At the time when the supply of the coating liquid to the substrate is started, the coating die is driven in the same direction as the substrate, and when the coating liquid is applied to the substrate from the coating die, the running of the coating die is stopped. Or at the time of making it run in the reverse direction to a base material and stopping supply of the coating liquid from a coating die to a base material, The die was allowed to run in the same direction as the substrate.

In the intermittent coating method and the intermittent coating apparatus according to the present invention, the coating liquid is intermittently supplied to the sheet-like substrate to be driven from a slit-shaped discharge port provided on the distal end surface of the die for coating, and the coating liquid is applied to the substrate. When apply | coating intermittently, at the time of starting supply of the coating liquid from a coating die to a base material as mentioned above, this coating die was made to run in the same direction as the said base material.

For this reason, until the discharge amount of the coating liquid discharged from the discharge port of the coating die gradually increases and stabilizes, the coating die moves along the substrate so that the relative speed of the coating die and the substrate is later than the traveling speed of the substrate. It is made to apply, and the inclination of the edge part of the application start side which starts application | coating of a coating liquid is suppressed.

In the step where the amount of the coating liquid discharged from the discharge port of the coating die is stabilized, the traveling of the coating die is stopped as described above, or the coating die is driven in the opposite direction to the substrate, and the substrate is driven from the coating die. By apply | coating a coating liquid to a base material, a coating liquid is apply | coated to a base material with fixed thickness.

In addition, at the time of stopping supply of the coating liquid from the coating die to the substrate, the coating die was allowed to run in the same direction as the substrate.

For this reason, the coating die moves along the substrate until the discharge amount of the coating liquid discharged from the discharge port of the coating die gradually decreases to prevent discharge, and the relative speed of the coating die and the substrate is lower than the traveling speed of the substrate. It is applied in a late state, and it becomes suppressed that the edge part of the application stop side which stops application | coating of a coating liquid inclines.

As a result, in the intermittent coating method and the intermittent coating device in the present invention, the end face on the coating start side which starts the application of the coating liquid to the base material and the end face on the coating stop side which stops the application of the coating liquid to the base material. It is formed vertically without inclining with respect to a base material, and can apply | coat a coating liquid with a fixed uniform thickness with respect to a base material.

These and other objects, advantages and features of the present invention will become apparent from the following description taken in conjunction with the accompanying drawings, which illustrate specific embodiments of the present invention.

EMBODIMENT OF THE INVENTION Below, the intermittent coating method and intermittent coating apparatus which concern on embodiment of this invention are demonstrated concretely based on an accompanying drawing. In addition, the intermittent coating method and the intermittent coating apparatus which concern on this invention are not limited to what was shown to the following embodiment, It can change and implement suitably in the range which does not change the summary of invention.

In this embodiment, as shown in FIG. 4, the control means 21 controls the conveyance means 20 which makes the base material 1 run over the backup roller 2, and conveys the coating die 10. As shown in FIG. ) To control.

Then, in a state where the front end surface 10a of the coating die 10 is placed downward, the front end surface 10a of the coating die 10 is spaced between the substrate 1 and the required distance. The application die 10 is placed over the backup roller 2 so as to follow the arc-shaped substrate 1 and in the same direction as the substrate 1; Drive

Then, when the traveling speed of the coating die 10 becomes almost the same speed as the traveling speed of the base material 1, the resin coating pipe 13 made of resin by the syringe pump 22 is formed. The coating liquid 12 is supplied to the coating die 10 through the slit, and as shown in FIG. 5 (A), from the slit-shaped discharge port 11 provided on the tip end surface 10a of the coating die 10. The base material 1 which discharges the coating liquid 12 to form a bead, moves the bead of the coating liquid 12 as described above by bringing the tip end surface 10a of the coating die 10 close to the base material 1. ).

Subsequently, in the state where the beads of the coating liquid 12 are brought into contact with the substrate 1 traveling, the traveling speed of the coating die 10 traveling along the substrate 1 is reduced, and the syringe pump 22 At the stage where the supply of the coating liquid 12 to the coating die 10 by the step (s) is stabilized, as shown in FIG. 5 (B), the running of the coating die 10 is stopped and the coating die ( The coating liquid 12 is applied to the substrate 1 that travels from the discharge port 11 of 10).

Here, in this way, when apply | coating to the base material 1 which runs the coating liquid 12 from the discharge port 11 of the coating die 10, as shown in FIG. 6, the said base material 1 and the coating die ( The base material which runs by the narrowed part is space | interval with the front end surface 10a of 10) rather than the space | interval G1 of the upstream of the running direction of the base material 1 on the downstream side. The thickness of the coating liquid 12 applied to (1) is regulated, and the coating liquid 12 is apply | coated to the base material 1 to a fixed thickness. In addition, since the liquid accumulating part 12a of the coating liquid 12 is fully formed by gravity, in the part of the traveling direction upstream of the base material 1 which extended the space | interval with the base material 1, liquid cutting It is possible to apply the coating smoothly.

And after apply | coating the coating liquid 12 to predetermined | prescribed length with respect to the base material 1 which runs in this way, supply of the coating liquid 12 to the coating die 10 by the syringe pump 22 is stopped. At the same time, as shown in FIG. 5C, the coating die 10 is driven along the substrate 1, and the traveling speed of the coating die 10 is accelerated to thereby apply the coating die 10. At the time when the traveling speed of) becomes almost the same speed as the traveling speed of the base material 1, this coating die 10 is raised to be spaced apart from the base material 1.

In addition, the relationship between the discharge amount of the coating liquid 12 and the traveling speed of the coating die 10 in the series of operations is as shown in FIG. 7.

When the coating liquid 12 is applied to the substrate 1 traveling in this way, the inclination of the end of the coating start side starting the coating of the coating liquid 12 is suppressed as described above, and the coating liquid 12 is Inclination of the end portion of the coating stop side for stopping the coating is also suppressed.

As a result, as shown in FIG. 8, the end surface 12a of the application | coating start side of the coating liquid 12 apply | coated to the base material 1, and the end surface 12b of the application stop side to the base material 1 are shown. It is formed vertically with respect to the base material 1, the coating liquid 12 is applied to a constant and uniform thickness.

Moreover, after raising the coating die 10 and spaced apart from the base material 1 as mentioned above, this coating die 10 is wash | cleaned in the middle of returning this coating die 10 to a coating start position. It guides to the apparatus 23, and it wash | cleans the front-end | tip of the coating die 10 by this washing | cleaning apparatus 23, and it is made to perform next application | coating.

Here, after raising the coating die 10 and separating it from the substrate 1, the substrate 1 runs while the coating die 10 is being cleaned by the cleaning apparatus 23, In order to prevent the part which the coating liquid 12 is not apply | coated to the base material 1 from lengthening, the running speed of the base material 1 in between is reduced, or the some die 10 for application | coating is carried out. ) Can be sequentially moved as described above, so that the coating liquid 12 can be applied intermittently to the substrate 1 to travel.

In addition, in said embodiment, as shown to FIG. 5 (B), it was made to apply | coat the coating liquid 12 to the base material 1 by stopping running of this coating die 10, However, the operation space In order to ensure the application, it is also possible to perform the application while driving the application die 10 in the opposite direction.

In addition, in this embodiment, it is made to follow the base material 1 which runs this coating die 10 in the state which always made the front end surface 10a of the coating die 10 downward as mentioned above. Although it was made to drive in the same direction as (1), the state which arrange | positions the coating die 10 is not limited to this.

For example, as in the embodiment shown in FIG. 9, a rotary arm 20 is provided on the backup roller 2 as the transfer means 20 for transferring the coating die 10. The rotation of the arm 20 is controlled by the control means 21 and the sliding die 10 is slidably held on the arm 20a of the rotary arm 20 protruding from the backup roller 2. The substrate 10 which runs in the radial direction so that this coating die 10 may be opposed to the backup roller 2, and runs so that the front end surface 10a of this coating die 10 may span the backup roller 2, and is run | worked. It is also possible to oppose (1).

Here, in this embodiment, the said coating die 10 is slid, and the front end surface 10a of this coating die 10 is made into the space | interval between the base material 1 which runs as mentioned above, and a clearance gap. At the same time, the rotary arm 20 is rotated so that the distal end surface 10a of the coating die 10 is opposed to the substrate 1, so that the coating die 10 is moved. It runs along the base material 1.

Then, when the traveling speed of the coating die 10 by the rotary arm 20 becomes almost the same speed as the traveling speed of the base material 1, the coating die 10 is applied by the syringe pump 22. ), The coating liquid 12 is discharged from the slit-shaped discharge port 11 provided in the front end surface 10a of the coating die 10, and the beads are discharged as shown in FIG. It forms and makes the bead of the coating liquid 12 contact the base material 1 which runs | moves as mentioned above.

And the die | dye for application | coating 10 which runs along the base material 1 by slowing the rotation speed of the said rotary arm 20 in the state which made the bead of the coating liquid 12 contact with the base material 1 which runs | worked The rotation of the rotary arm 20 is reduced as shown in FIG. 11 at a stage where the supply speed of the coating liquid 12 to the application die 10 by the syringe pump 22 is stabilized by reducing the traveling speed of It stops and the running of the coating die 10 is stopped, and it makes it apply | coat the coating liquid 12 to the base material 1 which runs the coating liquid 12 from the discharge port 11 of this coating die 10. FIG.

The coating liquid 12 is applied to the substrate 1 traveling in this manner to a predetermined length, and then the supply of the coating liquid 12 to the coating die 10 by the syringe pump 22 is stopped. As shown in FIG. 12, the rotary arm 20 is rotated so that the coating die 10 is driven along the substrate 1 so that the traveling speed of the coating die 10 is set to the substrate 1. When the speed becomes substantially the same as the traveling speed of, the application die 10 is slid in the direction away from the substrate 1.

Even when the coating liquid 12 is applied to the substrate 1 traveling in this way, similarly to the case of the above embodiment, the end of the coating start side at which the coating liquid 12 starts to be applied is inclined or the coating liquid is It is suppressed that the edge part of the application stop side which stops application | coating of 12 is inclined. As a result, as shown in FIG. 8 mentioned above, the end surface 12a of the application start side of the coating liquid 12 apply | coated to the base material 1, and the end surface 12b of the application stop side are perpendicular | vertical with respect to the base material 1 And the coating liquid 12 is applied to the substrate 1 with a constant and uniform thickness.

While the present invention has been fully described by way of example, it should be noted that various changes and modifications will be apparent to those skilled in the art.

Thus, unless such changes and modifications depart from the scope of the present invention, they should be construed as being included in the present invention.

BRIEF DESCRIPTION OF THE DRAWINGS The schematic explanatory drawing which showed the state which apply | coats a coating liquid intermittently from the die | dye for application to the base material which runs over the backup roller in the intermittent application apparatus of the prior art.

Fig. 2 is a diagram showing a change in the discharge amount of the coating liquid discharged from the coating die in the conventional example.

3 is a schematic side view showing a state of a coating liquid applied to a substrate in a conventional example.

4 is a schematic explanatory diagram showing a step in which a die for coating moves in one embodiment of the present invention.

FIG. 5 shows a bead formed by discharging the coating liquid from a discharge port provided on the distal end surface of the coating die when the traveling speed of the coating die becomes almost the same speed as the traveling speed of the substrate in the above embodiment. The state, the running of the coating die is stopped, the state to apply the coating liquid from the coating die to the substrate traveling, and the application die that has been stopped are moved along the substrate, so that the running speed of the coating die is driven by the substrate. It is a schematic explanatory drawing which shows the state which isolate | separates the die | dye for application | coating from a base material at the time when the speed became substantially the same as speed.

FIG. 6 is an enlarged explanatory diagram showing a state in which the coating liquid is applied to a base material traveling from the die for coating in the above embodiment;

FIG. 7 is a diagram showing a relationship between a discharge amount of a coating liquid discharged from a coating die and a traveling speed of the coating die in the above embodiment.

8 is a schematic side view showing the state of a coating liquid applied to a substrate in the above embodiment.

9 is a schematic explanatory diagram showing another embodiment of the present invention.

FIG. 10 shows a bead formed by discharging the coating liquid from a discharge port provided on the distal end surface of the coating die when the traveling speed of the coating die becomes almost the same speed as the traveling speed of the substrate in another embodiment described above. Schematic explanatory drawing which showed one state.

FIG. 11 is a schematic explanatory diagram showing a state in which the traveling of the coating die is stopped and the coating liquid is applied to a base material traveling from the coating die in another embodiment described above. FIG.

FIG. 12 shows the application die from the substrate when the application die that has been stopped is moved along the substrate in the other embodiment described above, and the traveling speed of the application die becomes almost the same speed as the traveling speed of the substrate. Schematic explanatory drawing which shows the spaced state.

* Explanation of symbols for the main parts of the drawings

1: description

2: backup roller

10: die for coating

10a: cross section

11: outlet

12: coating liquid

12a: liquid accumulation part

13: Coating liquid supply pipe

20: conveying means (rotary arm)

20a: arm

21: control means

22: syringe pump

23: cleaning device

Claims (8)

The coating liquid is intermittently supplied to a sheet-like base material which runs, from a slit-shaped discharge port provided on the front end surface of the coating die, An intermittent coating method for intermittently applying a coating liquid to the base material, the process of running the coating die in the same direction as the base material at the time point of supplying the coating liquid from the coating die to the base material; Stopping the running of the coating die or driving the coating die in a reverse direction to the substrate, and applying the coating liquid to the substrate running from the coating die; and supplying the coating liquid from the coating die to the substrate. And a step of running the coating die in the same direction as the base material at the point of stopping the operation. The traveling speed of the said application die | dye by the speed | rate of the said application | coating die | dye at the start time of starting supply of the coating liquid from the said application | coating die to a base material at the same speed as the said base material. Intermittent application method, characterized in that to slow down. The supply stop of the coating liquid according to claim 1 or 2, wherein when the supply of the coating liquid from the coating die to the substrate is stopped, the running speed of driving the coating die in the same direction as the substrate is stopped. At the time, the traveling speed of the said coating die is made to be the same speed as the said base material, The intermittent coating method characterized by the above-mentioned. The intermittent coating method according to any one of claims 1 to 3, wherein a distance between the base material and the front end face of the coating die is narrower than the upstream side of the substrate in the traveling direction. 5. The coating liquid according to any one of claims 1 to 4, wherein the substrate runs over a backup roller and intermittently applies a coating liquid from the coating die to the substrate at a position facing the backup roller. Intermittent coating method characterized in that. 6. The intermittent die according to claim 5, wherein the application die is driven along the rotational direction of the backup roller while the distal end surface of the application die is disposed in the radial direction so as to face the backup roller. Application method. The intermittent coating according to any one of claims 1 to 6, wherein after discontinuing the supply of the coating liquid from the coating die to the substrate, the tip portion of the coating die is cleaned by a cleaning device. Way. An intermittent coating device for intermittently supplying a coating liquid to a traveling sheet-like substrate from a slit-shaped discharge port provided on a distal end surface of a coating die, wherein the coating liquid is applied intermittently to the substrate. A conveying means for conveying the oil is provided, the conveyance of the coating die by the conveying means is controlled by a control means, and at the time of starting supply of the coating liquid from the coating die to the substrate, the coating is performed. At the time when the die for traveling is run in the same direction as the base material and the coating liquid is applied from the die for application to the base material, the running of the die for application is stopped or run in the opposite direction to the base material, and the coating is applied from the die for application to the base material. At the time of stopping the supply of the liquid, the coating die is made to run in the same direction as the substrate. Hull applying device.

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