JP6795994B2 - Die and coating method - Google Patents

Description

The present invention relates to an extrusion type die.

Conventionally, an extrusion type die has been used when a fluid is applied on a flat plate or a roll to produce a sheet, or when a fluid is applied to a base material or the like to form a coating film.

In order to uniformly apply the thickness of the film after application with high accuracy, a method of adjusting the slit spacing of the die by using an adjusting bolt has been proposed (Patent Document 1).

JP-A-2006-346649

The method of adjusting the slit spacing of the die according to the thickness distribution in the width direction of the film after the actual application using the adjusting bolt is predetermined because the vicinity of the slit of the die is partially deformed by the adjusting bolt. There is a problem that it takes time to deform until the adjustment amount is obtained, and a large production loss occurs. In addition, a large force was required as the torque of the adjusting bolt to deform the die.

In view of the above problems and concerns, the present invention provides a die that does not require a large force to deform the die and adjusts the thickness of the film after coating with high accuracy and easily in a short time. The purpose is.

The die of the present invention has a manifold that is a space for storing fluid long in the width direction and a discharge port that is connected to the manifold via a wide slit in the width direction and discharges the fluid in a sheet shape. In the die, a diaphragm which is provided on the wall surface of the slit long in the width direction in the width direction and in which a displacement surface which is a surface opposite to the surface of the slit in contact with the wall surface long in the width direction is displaced by a pressure action Yes to have, the diaphragm is characterized in that the magnitude of the displacement surface is have a different first diaphragm and the second diaphragm.

By using the die of the present invention, the reaction is quick with a smaller force than deforming the die, the cross-sectional shape of the flow path of the fluid to be applied can be adjusted, and the thickness of the film after application can be easily adjusted with high accuracy. It can be adjusted in a short time. In addition, the cross-sectional shape of the flow path of the fluid to be applied can be adjusted more finely, and the thickness of the film after application can be adjusted more accurately and easily in a short time.

As a result, production loss can be reduced.

The die of the present invention has a manifold that is a space for storing fluid long in the width direction and a discharge port that is connected to the manifold via a slit wide in the width direction and discharges the fluid in a sheet shape. In the die, a diaphragm is provided on a wall surface long in the width direction of the slit, and a displacement surface which is a surface opposite to the surface of the slit in contact with the wall surface long in the width direction is displaced by a pressure action. has, in the displacement surface side of the front Symbol diaphragm, including the diaphragm, and wherein the Rukoto provided thin plates to cover the long walls in the width direction of at least a portion of said slit.

By using the die of the present invention, the reaction is quick with a smaller force than deforming the die, the cross-sectional shape of the flow path of the fluid to be applied can be adjusted, and the thickness of the film after application can be easily adjusted with high accuracy. It can be adjusted in a short time. Further, by connecting the diaphragms with the thin plate, the change in the cross-sectional shape of the flow path of the fluid to be applied by the slit due to the displacement of the diaphragm becomes a smooth shape in which the displacement between the diaphragms is interpolated. Therefore, the thickness of the film after coating can be adjusted with higher accuracy and easily in a short time.

The die of the present invention has a manifold that is a space for storing fluid long in the width direction and a discharge port that is connected to the manifold via a wide slit in the width direction and discharges the fluid in a sheet shape. In the die, a diaphragm is provided on the wall surface of the slit long in the width direction in a plurality of directions in the width direction, and a displacement surface which is a surface opposite to the surface of the slit in contact with the wall surface long in the width direction is displaced by a pressure action. has a pressure regulating valve of multiple, further comprising a connecting pipe connecting the pressure regulating valve and one or more of the diaphragm, leading to one of the pressure regulating valve, the width of the slit the diaphragm occupies the width direction of the range of a long wall in the direction, the central portion is wide, ends and said narrow Ikoto.

By using the die of the present invention, the reaction is quick with a smaller force than deforming the die, the cross-sectional shape of the flow path of the fluid to be applied can be adjusted, and the thickness of the film after application can be easily adjusted with high accuracy. It can be adjusted in a short time. Further, it is possible to control the thickness of the end portion to the width direction of the slit of the film after coating the fabric with high accuracy.

The coating method of the present invention is a coating method in which the fluid is discharged in a sheet shape using the die, and the displacement surface is displaced by the pressure supply means to the diaphragm to flow the fluid. It is characterized by adjusting the cross-sectional shape.

According to this coating method, the thickness of the film after coating can be adjusted with high accuracy and easily in a short time without requiring a large force that deforms the die.

According to the present invention, the reaction is quick with less force than deforming the die, the cross-sectional shape of the flow path of the fluid to be applied can be adjusted, and the thickness of the film after application can be adjusted with high accuracy and easily in a short time. Production loss can be reduced.

It is a figure explaining an example which used the die of this invention in a roll-to-roll type coating equipment. It is a figure showing the embodiment of Example 1 of the die of this invention, (A) is the arrow view of a of FIG. 1, (B) is the view of arrow b of FIG. 1, and (C) is a view of arrow b of FIG. It is the figure which rotated the c arrow view of FIG. 1 by 90 degrees. It is a figure explaining the coating method which applies with the adjustment of the cross-sectional shape of the flow path of the coating liquid 3 using the die of Example 1. It is a figure explaining another embodiment of Example 1 of the die of this invention. It is a figure explaining the embodiment of Example 2 of the die of this invention. It is a figure explaining the embodiment of Example 3 of the die of this invention.

An example in which the die of the present invention is used in a roll-to-roll coating facility will be described with reference to FIG.

The coating equipment 1 shown in FIG. 1 has a die 10 formed long along the width direction of the base material 2, which is a direction orthogonal to the feeding direction of the base material 2 and a Y-axis direction in FIG. The base material is provided with a coating liquid supply means 20 for supplying the coating liquid 3 to the die 10, and the coating liquid 3 supplied from the coating liquid supply means 20 is discharged from the discharge port 11 provided on the die 10. Apply the coating liquid 3 to 2.

In the present description, the longitudinal direction of the die 10 is referred to as the width direction, which is the same direction as the width direction of the base material 2. In the coating equipment 1 of this embodiment, the roll 5 facing the die 10 is installed, and the width direction of the die 10 and the direction of the rotation center line of the roll 5 are parallel to each other. The base material 2 is guided by the roll 5, and the distance between the base material 2 and the die 10 is kept constant, and the coating liquid 3 is applied to the base material 2 in this state.

The die 10 has a manifold 12 that is a long space in the width direction inside, has a long space in the width direction, and communicates with the discharge port 11 via a slit 13 that is a flow path of the coating liquid 3. ing.

In this embodiment, for convenience, the length of the manifold 12 in the width direction is the same as the length of the slit 13 in the width direction, as shown in FIG. 2A, which is a view taken along the arrow a of FIG. The length of the manifold 12 in the width direction is set so that the thickness distribution of the base material 2 of the coating liquid 3 applied to the base material 2 becomes uniform in consideration of the analysis result of the flow state of the coating liquid 3. The length of the manifold 12 in the width direction may be changed.

The coating liquid 3 supplied from the coating liquid supply means 20 is temporarily stored in the manifold 12 through the coating liquid supply port 14 communicating with the manifold 12, and is the same as the slit 13 in the width direction via the slit 13. It is applied to the base material 2 from the discharge port 11 which is the length.

The features of the die 10 of Example 1 of the present invention will be described with reference to FIGS. 1 and 2 (B) and 2 (C). FIG. 2B is a view taken along the arrow b in FIG. 1, and FIG. 2C is a view obtained by rotating the arrow c in FIG. 1 by 90 degrees.

As shown in FIGS. 2B and 2C, a plurality of first diaphragms 15 that are displaced by the action of pressure are provided on the inner wall surface on the side long in the width direction of the slit 13 so as to be arranged in the width direction. The pressure is transmitted to the plurality of first diaphragms 15 by the pressure supply means 30 communicating with the plurality of first diaphragms 15 through the plurality of pressure supply ports 16 provided on the die 10, and each of the first diaphragms 15 is provided. The displacement of 15 changes the shape of the inner wall surface on the long side in the width direction of the slit 13, and changes the cross-sectional shape of the flow path of the coating liquid 3 flowing through the slit 13. In this embodiment, the pressure transmission medium in the pressure supply means 30 uses compressed air, but it may be another gas such as an inert gas or a liquid such as water pressure or hydraulic pressure depending on the environment.

In this embodiment, as shown in FIGS. 2B and 2C, the width direction of the slit 13 is defined as the end portion (z1), the intermediate portion (z2), the central portion (z3), and the intermediate portion (z4). It is divided into 5 zones at the end (z5). The compressed air pipe 37 from the pressure supply source 36 is distributed to the connecting pipes 31 to 35 corresponding to the five zones (z1 to z5), and the connecting pipes 31 to 35 are pressure adjusting valves for adjusting the pressure from the pressure supply source 36. 41 to 45 are provided, and the first diaphragm 15 belonging to the five zones (z1 to z5) is displaced.

FIGS. 3 (A) to 3 (D) show an example of a coating method in which the thickness of the coating liquid 3 applied on the base material 2 in the width direction of the die 10 of this embodiment is adjusted. It will be described below in use. 3A and 3B are views showing the state of the thickness distribution in the width direction of the coating liquid 3 on the base material 2 after the coating liquid 3 is applied, and are sectional views in the width direction of the base material 2. is there. 3 (C) and 3 (D) are views showing the change in the cross-sectional shape of the flow path of the coating liquid 3 in the slit 13 portion by operating the first diaphragm 15, and are viewed with arrows b in FIG. 1 of the die 10. It is a cross-sectional view of.

First, when the coating equipment 1 is operated without adjusting the pressure on the first diaphragm 15 of the five zones (z1 to z5) and the coating liquid 3 is applied to the base material 2, the base material 2 is applied. It is assumed that the thickness distribution of the coating liquid 3 applied above in the width direction of the base material 2 is not uniform. An example is shown in FIG. 3 (A). In this example, the thickness of the coating liquid 3 applied on the base material 2 is thicker at the center and thinner toward the edges with respect to the width direction of the base material 2.

In this state, the distribution of the coating liquid 3 flowing through the slit 13 in the width direction flows more in the central portion (z3) and less in the intermediate portions (z2) and (z4) to the end portions (z1) and (z5). It is thought that it is.

Here, the following operations are performed so that the thickness distribution in the width direction of the base material 2 of the coating liquid 3 applied on the base material 2 becomes uniform. First, the pressure supplied to the first diaphragm 15 in the central portion (z3) is made higher than the pressure supplied to the other zones by operating the pressure adjusting valve 43, and the pressure at the end portion (z1) and the end portion (z5) is increased. The pressure supplied to the first diaphragm 15 is made lower than that of the other zones by operating the pressure adjusting valves 41 and 45, and the pressure supplied to the first diaphragm 15 of the intermediate portion (z2) and the intermediate portion (z4) is , The pressure adjusting valves 42 and 44 are operated to make the pressure intermediate between the pressure supplied to the central portion (z3) and the pressure supplied to the end portion (z1) and the end portion (z5).

By the above adjustment, the cross-sectional shape of the flow path through which the coating liquid 3 flows in the slit 13 is changed from the state of FIG. 3 (C) to the state of FIG. 3 (D), and the distribution of the coating liquid 3 flowing through the slit 13 in the width direction is changed. By making it uniform, the thickness distribution of the coating liquid 3 applied on the base material 2 in the width direction of the base material 2 is adjusted to be uniform.

By operating the pressure adjusting valves 41 to 45 in this way to uniformly adjust the distribution in the width direction of the coating liquid 3 flowing through the slit 13, the thickness distribution in the width direction of the coating film applied on the substrate 2 Can be quickly adjusted from the state of FIG. 3 (A) to the state of FIG. 3 (B) with a smaller force than deforming the die 10, so that the production loss due to the adjustment can be reduced.

Further, as a coating method for adjusting the thickness distribution in the width direction of the coating film coated on the substrate 2 without deforming the die 10, the coating liquid 3 is flowed inside the die 10 according to Japanese Patent Application Laid-Open No. 2015-176822. Although the invention of flowing out or flowing in the middle of the road is disclosed, in the coating method of the present embodiment, the coating liquid 3 is not flowed out or flowing in the middle of the flow path inside the die 10, so that the coating liquid 3 is lost or contaminated. There is no problem with nation.

In this embodiment, the plurality of first diaphragms 15 are divided into five zones with respect to the width direction of the die 10, the intermediate portions (z2) and (z4) are narrower than the central portion (z3), and the end portions (z4) are further narrowed. z1) and (z5) are narrower than the intermediate portions (z2) and (z4).

Thereby, the edge portion can be finely adjusted in the thickness distribution in the width direction of the coating film applied on the base material 2.

The coating liquid 3 flowing inside the die 10 may be difficult to flow due to the influence of the wall resistance of the inner wall surface of the widthwise end portion of the flow path in the die 10.

In this case, the range affected by the wall surface resistance or the like depends on the physical properties of the coating liquid 3, but is a certain distance from the inner wall surface of the end portion in the width direction, and is not so affected when the distance is longer than that. Since the flow path of the coating liquid 3 in the slit 13 is long in the width direction, the range that is not so affected by the wall surface resistance and the like is wider than the range that is affected by the wall surface resistance.

Further, even within the range affected by the wall surface resistance or the like, the influence of the wall surface resistance or the like becomes remarkable as the distance from the inner wall surface of the end portion in the width direction becomes shorter.

A wide range that is not so affected by wall resistance, etc. is defined as one zone, and the central part (z3) is defined. In the range that is affected by wall resistance, etc., the zones are further divided and are prominently close to the inner wall surface at the end in the width direction. The range strongly affected by wall resistance and the like is narrowed to the end portions (z1) and (z5), and the other is wider than the end portions (z1) and (z5) to be the intermediate portions (z2) and (z4). As a result, the edge portion can be finely adjusted, and the thickness distribution in the width direction of the coating film applied on the base material 2 can be adjusted more uniformly.

Further, in this embodiment, the plurality of first diaphragms 15 are adjusted by dividing them into five zones with respect to the width direction of the die 10, but the zones to be adjusted may be further subdivided.

By further subdividing the zone to be adjusted, it is possible to make finer adjustments to the thickness distribution in the width direction of the coating film 3 applied on the base material 2.

Further, in FIG. 1, a sensor 6 for measuring the thickness of the coating film of the coating liquid 3 applied on the base material 2 over the width direction of the base material 2 is provided, and the measurement data of the sensor 6 is used as a control device. The adjustment valves 41 to 45 may be controlled by 7.

In this case, the thickness distribution in the width direction of the coating film can be adjusted more quickly, so that the production loss is further reduced. Further, for example, the base material 2 of the coating liquid 3 coated on the base material 2 due to a change over time such that the solid content of the coating liquid 3 adheres to the die 10 during long-term production. Even if the thickness distribution in the width direction changes, it can be adjusted automatically.

Moreover, since it can be controlled only by compressed air, it can be used in an environment where an explosion-proof structure is required.

In FIGS. 1 and 2B, a plurality of first diaphragms 15 are provided on one side of the inner wall surface on the long side in the width direction of the slit 13, but as shown in FIG. 4A, the width direction of the slit 13 It may be provided on both sides of the inner wall surface on the long side.

In this case, in the case of the first diaphragm 15 having the same displacement amount, the cross-sectional shape of the flow path of the coating liquid 3 flowing through the slit 13 can be significantly changed as compared with installing the first diaphragm 15 on only one side.

In the die of Example 2 of the present invention, the die 10 described in Example 1 has a plurality of first diaphragms having a surface area opposite to the surface in contact with the inner wall surface on the long side in the width direction of the slit 13. A plurality of second diaphragms 17, which are smaller than 15, are further provided in the width direction of the inner wall surface on the long side in the width direction of the slit 13.

An example of the embodiment of the die of the present invention in Example 2 is shown in FIGS. 5 (A), (B), (C) and 4 (B). 5 (A), (B), and (C) show the arrangement of the first diaphragm 15 and the second diaphragm 17 on the inner wall surface on the inner wall surface on the side long in the width direction of the slit 13 in the width direction of the die 10. It is a figure which rotated the c arrow view in FIG. 1 by 90 °. FIG. 4B is a cross-sectional view of the die 10 as viewed from the same direction as in FIG.

In the example shown in FIG. 5 (A), a plurality of first diaphragms 15 are provided on the downstream side of the plurality of second diaphragms 17 with respect to the flow direction of the coating liquid 3, and are shown in FIG. 5 (B). In the example, the arrangement is reversed from the example shown in FIG. 5 (A).

In the example shown in FIG. 5B, for example, the thickness distribution in the width direction of the coating film due to the shape of the manifold 12 or the slit 13 of the die 10 is roughly adjusted by the first diaphragm 15, and the first diaphragm 15 is used. Fine adjustment may be made with the diaphragm 17 of 2.

By doing so, the components of the coating liquid 3 adhere to the inside of the die 10 during continuous production, or the viscosity of the coating liquid 3 changes due to some influence, and the thickness distribution of the coating film in the width direction changes slightly. It can be easily fine-tuned when it occurs.

In the example shown in FIG. 5C, a plurality of second diaphragms 17 and a plurality of first diaphragms 15 are mixed.

By doing so, in adjusting the cross-sectional shape of the flow path of the coating liquid 3 flowing through the slit 13, the displacement of the second diaphragm 17 is between the displacement of the first diaphragm 15 and the displacement of the other adjacent first diaphragm. The cross-sectional shape of the flow path can be adjusted to interpolate.

The arrangement of the plurality of first diaphragms 15 or the plurality of second diaphragms 17 is not limited to the above-mentioned example, and can be freely arranged in consideration of the flow characteristics of the coating liquid 3 applied by the die 10.

Further, these may be provided on both sides of the inner wall surface on the long side in the width direction of the slit 13 as shown in FIG. 4 (A), or in the width direction of the slit 13 as shown in FIG. 4 (B). A plurality of first diaphragms 15 may be provided on one surface of the inner wall surface on the long side, and a plurality of second diaphragms 17 may be provided on the other surface.

By using diaphragms of two different sizes, the thickness of the coating liquid 3 applied on the base material 2 in the width direction of the base material 2 can be adjusted more finely.

The die of Example 3 of the present invention has a plurality of first diaphragms 15 or second diaphragms provided on the inner wall surface on the inner wall surface on the side long in the width direction of the slit 13 of the die 10 described in Example 1 or Example 2. A thin plate 18 covering the inner wall surface on the long side in the width direction of the slit 13 is provided on the surface side opposite to the surface in contact with the inner wall surface on the long side in the width direction of the slit 13. An example is shown in FIGS. 6 (A), (B), (C), and (D).

6 (A) and 6 (B) are cross-sectional views of the die 10 viewed from the same direction as in FIG. 1, and FIG. 6 (C) is a view obtained by rotating the d arrow of FIG. 6 (A) by 90 °. Yes, (D) is a view obtained by rotating the e-arrow view of FIG. 6 (B) by 90 °. 6 (A) and 6 (C) show the state where the displacement of the first diaphragm 15 or the second diaphragm 17 is the smallest, and FIGS. 6 (B) and 6 (D) show the state of FIG. 6 (A). It represents a state in which the first diaphragm 15 or the second diaphragm 17 is further subjected to pressure and displaced.

In the third embodiment, the thin plate 18 is provided so as to cover the inner wall surface on the side long in the width direction of the slit 13 provided with the plurality of first diaphragms 15 or the plurality of second diaphragms 17 in the width direction. The thin plate 18 is a member that can be deformed by the force of displacement of the plurality of first diaphragms 15 or the plurality of second diaphragms 17, and expands and contracts according to the displacement of the first diaphragm 15 or the second diaphragm 17. Or, it is deformed while sliding with respect to the flow direction or width direction of the coating liquid 3. The material of the thin plate 18 is, for example, a thin plate made of resin, rubber, metal, or the like. Further, the inner wall surface on the side long in the width direction of the slit 13 provided with the thin plate 18 has a thickness of the thin plate 18 or a plurality of thin plates 18 so that there is no step in the shape of the inner wall surface through which the coating liquid 3 flows up to the thin plate 18 and the discharge port 11. The inner wall surface on the long side in the width direction of the slit 13 is recessed by the amount of the thickness of the first diaphragm 15 or the plurality of second diaphragms 17.

The thin plate 18 that deforms due to each displacement of the plurality of first diaphragms 15 or the plurality of second diaphragms 17 smoothly connects the displacements between the first diaphragm 15 or the second diaphragm 17, and FIG. As shown in the above, the adjustment of the cross-sectional shape of the flow path through which the coating liquid 3 of the slit 13 flows can be adjusted by interpolating the displacement between the first diaphragm 15 or the second diaphragm 17. As a result, the thickness of the coating liquid 3 applied on the base material 2 in the width direction of the base material 2 can be adjusted more smoothly.

In the examples shown in FIGS. 6A and 6B, the thin plate 18 is provided only on one side of the inner wall surface on the side longer in the width direction of the slit 13, but may be provided on both sides.

In this case, the cross-sectional shape of the flow path of the coating liquid 3 flowing through the slit 13 can be significantly changed as compared with the case where the first diaphragm 15 or the second diaphragm 17 and the thin plate 18 are installed on only one side.

With the above die and coating method, the reaction is quick with less force than deforming the die, the cross-sectional shape of the flow path of the fluid to be coated can be adjusted, and the thickness of the film after coating can be adjusted with high accuracy and easily for a short time. Can be adjusted with, and production loss can be reduced.

Here, the die and the coating method of the present invention are not limited to the forms described above, and may be other forms within the scope of the present invention. For example, when applied to a die used in a single-wafer coating device to apply a fluid to a sheet-shaped base material, or when applied to a solution film forming device or the like, the fluid is applied onto a flat plate to form a sheet. It can also be applied to a die used in the case of forming a sheet by directly applying a fluid onto a roll.

1 Coating equipment 2 Base material 3 Coating liquid 5 Roll 6 Sensor 7 Control device 10 Die 11 Discharge port 12 Manifold 13 Slit 14 Coating liquid supply port 15 First diaphragm 16 Pressure supply port 17 Second diaphragm 18 Thin plate 20 Coating liquid Supply means 30 Pressure supply means 31, 32, 33, 34, 35 Connection piping 36 Pressure supply source 37 Compressed air piping 41, 42, 43, 44, 45 Pressure adjustment valve

Claims (4)

A manifold, which is a space for storing fluid for a long time in the width direction,
In a die in which a discharge port which is connected to the manifold via a slit wide in the width direction and discharges the fluid in a sheet shape is formed.
A plurality of slits are provided on a wall surface long in the width direction in the width direction.
And have a diaphragm the displacement surface is a surface opposite to the width direction in contact with the long wall face of the slit is displaced by pressure action,
The diaphragm, die, characterized in that the magnitude of the displacement surface is have a different first diaphragm and the second diaphragm. A manifold, which is a space for storing fluid for a long time in the width direction,
In a die in which a discharge port which is connected to the manifold via a slit wide in the width direction and discharges the fluid in a sheet shape is formed.
A plurality of slits are provided on a wall surface long in the width direction in the width direction.
It has a diaphragm in which the displacement surface, which is the surface opposite to the surface of the slit in contact with the long wall surface in the width direction, is displaced by the action of pressure.
A die characterized in that a thin plate including the diaphragm is provided on the displacement surface side of the diaphragm to cover a wall surface long in the width direction of at least a part of the slits. A manifold, which is a space for storing fluid for a long time in the width direction,
In a die in which a discharge port which is connected to the manifold via a slit wide in the width direction and discharges the fluid in a sheet shape is formed.
A plurality of slits are provided on a wall surface long in the width direction in the width direction.
It has a diaphragm in which the displacement surface, which is the surface opposite to the surface of the slit in contact with the long wall surface in the width direction, is displaced by the action of pressure.
With multiple pressure control valves,
Further having a connecting pipe connecting the pressure adjusting valve and one or more of the diaphragms,
The widthwise range of the widthwise long wall of the slit occupied by the diaphragm, which is connected to the pressure regulating valve, is:
A die characterized by a wide center and narrow edges. In a coating method in which the fluid is discharged in a sheet shape and coated by using the die according to any one of claims 1 to 3 .
The displacement surface is displaced by the pressure supply means to the diaphragm.
A coating method characterized by adjusting the cross-sectional shape of a fluid flow path.

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