KR102476172B1 - Coating device and coating method - Google Patents

Abstract

It is an object to coat a coating film in which coating streaks do not occur. Specifically, the first manifold 11, which is long in the width direction (TD) and consists of a space for storing the coating liquid, and is connected to the first manifold 11 via a slit 12 wide in the width direction, , a plurality of discharge ports 18 for discharging the coating liquid 3 to the substrate 2, and a plurality of discharge ports 18 between the first manifold 11 of the slit 12 and the discharge port 18 in the width direction, From the die 10 provided with the discharge ports 31, 32, 33, 34 through which the coating liquid is discharged, and the inlet 16 communicating with the first manifold 11 to the first manifold 11 A supply means 20 for supplying the coating liquid is provided, and an end surface of an opening on the side of the slit 12 in the discharge port 31, 32, 33, 34 is larger than a direction orthogonal to the width direction TD. It was set as the coating apparatus (1) characterized by the wide-width shape which has a long dimension in the said width direction (TD).

Description

Coating device and coating method

The present invention relates to a coating device and a coating method for coating a substrate with a coating liquid.

It is practiced to manufacture a battery electrode plate or the like by applying a coating liquid to a substrate that is transported by roll-to-roll through an ejection port of a die. Since the thickness of the coating film formed on the substrate directly affects the charge/discharge amount of the battery, for example, in the case of a battery, management of the film thickness of the coating solution applied to the substrate becomes very important. In short, the coating liquid needs to be applied in a uniform thickness along the width direction and the conveying direction of the base material.

Patent Literature 1 describes a configuration in which the thickness of a coating film formed on a substrate is made uniform even when the coating solution is continuously discharged for a long time.

Japanese Unexamined Patent Publication No. 2015-97198

However, as described in Patent Literature 1, the flow rate of the coating liquid at the central portion of the cross section of the discharge port (adjustment unit) that returns the coating liquid from the die to the tank is faster than that of the peripheral portion of the cross section, causing fluctuations in the coating liquid discharge amount, and the width direction in which the discharge port exists. There was a problem that coating stripes were generated on the coating surface at the position of .

The present invention solves the above problems and makes it a subject to coat a coating film in which coating streaks do not occur.

In order to solve the above problems, the present invention is connected to the first manifold via a slit wide in the width direction and a first manifold composed of a space for storing the coating liquid that is long in the width direction, and the coating liquid to the base material. A die having a plurality of discharge ports for discharging and a discharge port for discharging the coating liquid formed in plurality in the width direction between the first manifold of the slit and the discharge port;

a supply means for supplying a coating liquid to the first manifold from an inlet communicating with the first manifold;

The cross section of the opening on the side of the slit in the discharge port is a wide width shape having a dimension longer in the width direction than in a direction orthogonal to the width direction.

With this structure, since local flux fluctuations can be dispersed, it is possible to apply a coating film in which coating streaks do not occur.

A configuration in which a second manifold elongated in the width direction is formed between the first manifold of the slit and the discharge port, and an opening on the slit side of the discharge port is formed in the second manifold. can be done with

With this configuration, it is possible to easily adjust the discharge flow rate and to apply a coated film in which no coating streaks occur.

The wide shape may be an elongated hole having a dimension longer in the width direction than in a direction orthogonal to the width direction.

With this configuration, the production of the discharge port is easy, and the flow velocity of the coating liquid can be effectively leveled.

An end portion of the discharge port on the side opposite to the opening on the slit side is connected to a pipe having a circular cross section, and the cross section at the connection portion with the pipe is circular, so that the discharge port It is good also as a structure which has formed the taper shape from the said wide shape to the said circular shape.

With this configuration, there is no discontinuity at the connection portion from the discharge port to the pipe in the die, and the coating liquid can flow out smoothly. If the discharge port does not taper from the wide shape to the circular shape and there is a discontinuous point at the connection portion from the discharge port to the pipe, retention of the coating liquid is likely to occur.

Further, in order to solve the above problems, the present invention discharges a coating liquid stored in a first manifold formed on a die that is long in the width direction from a discharge port connected to the first manifold via a slit wide in the width direction. A method of coating a base material by applying the coating to a substrate, wherein a plurality of layers are formed between the first manifold of the slit and the discharge port in the width direction, and an opening on the side of the slit in a discharge port for flowing a coating liquid is formed in the width It is to provide a coating method characterized by dispersing local fluctuations in flow velocity by forming a wide shape having dimensions longer in the width direction than in the direction orthogonal to the direction.

With this structure, since local flux fluctuations can be dispersed, it is possible to apply a coating film in which coating streaks do not occur.

BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the schematic structure of the coating apparatus in Example 1 of this invention.
Fig. 2 is a cross-sectional view seen from the arrow a in Fig. 1;
3(a) is a sectional view taken along the arrow b in FIG. 1, and (b) is a plan view of the referee 15. As shown in FIG.
Fig. 4 is a diagram explaining an exhaust port in Example 1 of the present invention, wherein (a) is a top view, (b) is a BB sectional view of (a), and (c) is a CC sectional view of (a).
Fig. 5 is a diagram explaining an exhaust port in a modified example, wherein (a) is a top view, (b) is a BB sectional view of (a), and (c) is a CC sectional view of (a).
Fig. 6 is a diagram for explaining the schematic configuration of a coating device in Example 2 of the present invention.

Example 1

Example 1 of the present invention will be described with reference to FIGS. 1 to 5 . BRIEF DESCRIPTION OF THE DRAWINGS It is a figure explaining the schematic structure of the coating apparatus in Example 1 of this invention. Fig. 2 is a cross-sectional view seen from the arrow a in Fig. 1; 3(a) is a sectional view taken along the arrow b in FIG. 1, and (b) is a plan view of the referee 15. As shown in FIG. Fig. 4 is a diagram explaining an exhaust port in Example 1 of the present invention, wherein (a) is a top view, (b) is a B-B sectional view of (a), and (c) is a C-C sectional view of (a). Fig. 5 is a view explaining an exhaust port in a modified example, wherein (a) is a top view, (b) is a B-B sectional view of (a), and (c) is a C-C sectional view of (a).

The coating apparatus 1 is an apparatus for coating the coating liquid 3 to the substrate 2 transported by roll-to-roll. The coating liquid 3 is applied with a uniform thickness (uniform coating amount) along the transport direction MD of the base material 2 . In addition, the width direction (TD) of the base material 2 is a direction orthogonal to the transport direction (MD) of the base material 2, and the Y-axis direction in FIG. 1 corresponds to this.

The coating device 1 is provided with a die 10 elongated along the width direction of the substrate 2 and a supply means 20 for supplying the coating liquid 3 to the die 10. In the die 10, its longitudinal direction (the Y-axis direction in FIG. 1) is referred to as the transverse direction (TD). In this coating device 1, a roller 5 opposing the die 10 is provided, and the width direction of the die 10 and the direction of the center line of rotation of the roller 5 are parallel. The base material 2 is guided by the roller 5, and the distance (gap) between the base material 2 and the die 10 (the tip of the slit 12 described later) is kept constant, and in this state the coating liquid ( The coating of 3) is performed.

The die 10 includes a first divided body 13 having a tapered first lip 13a and a second divided body having a tapered second lip 14a ( 14) with the referee 15 interposed therebetween. Fig. 2 is a cross-sectional view seen from the arrow a in Fig. 1; Fig. 3(a) is a sectional view seen from the arrow b in Fig. 1, and the referee 15 is shown in Fig. 3(b). In the die 10, a first manifold 11 formed of a space elongated in the width direction and a slit 12 connected to the first manifold 11 are formed inside the die 10, and a first lip Between 13a and the second lip 14a, a discharge port 18, which is an open end of the slit 12, is formed. That is, the first manifold 11 and the discharge port 18 are connected via the slit 12 .

With this configuration, the coating liquid 3 supplied by the supply means 20 is first stored in the first manifold 11 and then discharged from the discharge port 18 via the slit 12 .

The slit 12 is formed long in the width direction (TD) like the first manifold 11, and the width direction dimension of the slit 12 is the inner dimension W of the referee 15 described later ( 3(b)), the coating liquid 3 having substantially the same width direction dimension as that of the slit 12 in the width direction can be applied on the base material 2 . The clearance dimension (height dimension) of the slit 12 is 0.4-1.5 mm, for example. In Example 1, the die 10 is installed in such a posture that the direction of the gap between the slits 12 is the vertical direction and the width direction is the horizontal direction. In short, the die 10 is installed in an attitude in which the first manifold 11 and the slits 12 are arranged side by side in the horizontal direction. Therefore, the direction in which the coating liquid 3 stored in the first manifold 11 flows through the slit 12 and the discharge port 18 to the substrate 2 is the horizontal direction.

In addition, by changing the thickness of the plate 15, the pressure inside the first manifold 11 (coating pressure) can be adjusted, and by this adjustment, the coating liquid 3 having various characteristics can achieve a uniform film thickness. It becomes possible to perform coating.

In Example 1, the direction in which the coating liquid 3 flows through the discharge port 18 to the substrate 2 was set to the horizontal direction, but it is not necessarily limited to this direction and can be changed as appropriate. For example, it may be upward or downward, and it may be set in any direction.

An inlet 16 is formed at the center of the die 10 in the width direction, and the inlet 16 is a through hole (inlet) connected to the first manifold 11 from the outside of the die 10. ) is made up of The supply means 20 includes an inlet pipe 21 connected at one end to the inlet 16, a tank 22 storing the coating liquid 3, and the coating liquid 3 in the tank 22. to the die 10 via the pipe 21. From the above, the supply means 20 can supply the coating liquid 3 to the 1st manifold 11 from the inflow part 16. Further, in Example 1, as shown in FIG. 1 , the inlet portion 16 is connected to the bottom portion 17 of the first manifold 11, and from this bottom portion 17, the liquid coating 3 It is configured to introduce .

And the 1st manifold 11 can store the coating liquid 3 supplied from the supply means 20, and the coating liquid 3 stored in the 1st manifold 11 is passed through the slit 12 Through the discharge port 18, it is discharged to the base material 2 that is transported in a roll-to-roll manner, and the coating liquid 3 can be continuously applied to the base material 2. The size of the gap between the slits 12 is constant in the width direction, and the thickness of the coating liquid 3 applied on the substrate 2 is constant in the width direction.

In addition, a pressure sensor (not shown) is formed in the die 10 , and this pressure sensor measures the internal pressure of the coating liquid 3 of the first manifold 11 . And based on this measurement result, the supply of the coating liquid 3 by the supply means 20 is controlled, and the internal pressure of the coating liquid 3 of the 1st manifold 11 is kept constant. The coating liquid 3 whose internal pressure is constant in the first manifold 11 is discharged in an equal amount over the entire length in the width direction from the slit 12, and based on the measurement result of the pressure sensor, the slit The amount of the coating liquid 3 discharged from the 12 is controlled so as not to fluctuate, so that the thickness of the coating liquid 3 applied on the substrate 2 in the conveying direction is constant. In addition, although not shown, a filter for the coating liquid 3 is formed in the middle of the pipe 21 .

And discharge ports 31, 32, 33, 34 through which the coating liquid 3 of the 1st manifold 11 flows out of the die 10 from other than the discharge port 18 are formed in the slit 12, have. In Example 1, the first and second discharge ports 31 and 32 are formed at both ends 12a and 12b in the width direction of the slit 12, and the middle part between the both ends 12a and 12b ( 12c, 12d) are provided with third and fourth discharge ports 33 and 34.

The discharge ports 31, 32, 33, and 34 include through-holes connecting the slit 12 and the outside of the die 10, and pipes 51, 52, 53, and 54 having a circular cross section connected to the through-holes. ) is made up of One ends of the pipes 51, 52, 53, and 54 are connected to the tank 22, and the coating liquid 3 stored in the tank 22 flows into the first manifold 11 from the inlet 16, Together, the coating liquid 3 can be returned to the tank 22 from the discharge ports 31, 32, 33 and 34.

The end faces of the openings on the slit side of the discharge ports 31, 32, 33, 34 have a wide width shape with dimensions longer in the width direction TD than in the direction orthogonal to the width direction TD. This is to avoid fluctuations in the local flow velocity of the coating liquid 3 in the discharge ports 31, 32, 33, and 34. In general, when a liquid flows in a circular shape in cross section, the flow velocity in the central portion of the circular shape increases and local fluctuations in the flow velocity occur. When such a local fluctuation in flow rate occurs in the discharge port 31, 32, 33, 34, there is a case where a long coating streak occurs in the conveying direction MD in the coated film at the position of the discharge port. have. In Example 1, in order to prevent the occurrence of these coating streaks, the end faces of the openings on the slit side of the discharge ports 31, 32, 33, 34 are formed in the width direction (TD) rather than in the direction orthogonal to the width direction (TD). Research is being conducted to prevent local fluctuations in flow velocity by making it a wide shape with a longer dimension.

Further, a more preferable opening end surface on the slit side of the discharge ports 31, 32, 33, 34 is a long hole shape having a dimension longer in the transverse direction TD than in the direction orthogonal to the transverse direction TD. This makes it easy to manufacture the discharge port, and the flow velocity of the coating liquid can be effectively leveled.

The shape of the discharge port in Example 1 is explained in detail. Since the discharge ports 31, 32, 33, and 34 all have the same shape, the discharge port 32 will be described as an example. Fig. 4 (a) is a top view of the discharge port 32 viewed from the slit 12 side, (b) is a sectional view of (a), and (c) is a C-C sectional view of (a).

3(a) and 4(a), the cross section of the opening on the slit 12 side of the discharge port 32 is longer in the width direction TD than in the direction orthogonal to the width direction TD. It has the shape of a long hole with dimensions. In addition, the length of the cross section of the opening section on the slit 12 side of the discharge port 32 in the width direction (TD) is longer than the diameter of the pipe 52, and the length in the direction orthogonal to the width direction (TD) is the pipe 52 is shorter than the diameter of On the other hand, the end of the discharge port 32 on the side opposite to the slit 12 side is connected to the pipe 52 having a circular cross section. Since the cross-sectional shape of the pipe 52 is circular, the discharge port 32 is tapered from a wide long hole shape to a circular shape so that the connection portion of the discharge port 32 with the pipe 52 is circular. It has a configuration (see Fig. 4 (b), (c)). As a result, the discharge port 32 can be smoothly connected to the piping 52 having a circular cross section, suppressing local fluctuations in flow velocity, and preventing the retention of the coating liquid 3 in the connection portion. can

In Example 1, the cross section of the opening on the side of the slit 12 of the discharge port 32 was formed as a long hole having a dimension longer in the transverse direction (TD) than in the direction orthogonal to the transverse direction (TD). , It is not necessarily limited to this and can be changed appropriately. For example, the cross section of the opening on the side of the slit 12 of the discharge port 32 may be a rectangular shape having a dimension longer in the width direction TD than the direction orthogonal to the width direction TD, or an elliptical shape. can be done with At least the cross section of the opening on the side of the slit 12 of the discharge port 32 may be any shape having a dimension longer in the transverse direction TD than in the direction orthogonal to the transverse direction TD. Further, the length of the cross section of the opening section on the slit 12 side of the discharge port 32 in the direction perpendicular to the width direction (TD) was set to have a shape shorter than the diameter of the pipe 52, but is not necessarily limited to this. No, it can be changed appropriately. For example, the length in the direction orthogonal to the width direction TD may be the same as the diameter of the pipe 52.

If the cross section of the opening on the slit 12 side of the discharge port 32 is a shape having a dimension shorter in the width direction TD than in the direction orthogonal to the width direction TD, the same discharge port as the circular shape ( 32), local fluctuations in flow rate occur, and irregularities are formed on the coated surface due to fluctuations in the coating amount, resulting in the formation of coating stripes.

A control device for adjusting the amount of the coating liquid 3 flowing out from the slit 12 is provided in each of the discharge ports 31, 32, 33, and 34. Specifically, as shown in FIG. 2 , valves 61, 62, 63, and 64 are connected to pipes 51, 52, 53, and 54 as the control device. Each of these valves 61, 62, 63, and 64 has a function of adjusting the flow rate of the coating liquid 3 flowing out of each of the discharge ports 31, 32, 33, and 34. Further, each of the valves 61 , 62 , 63 , and 64 may adjust the pressure of the coating liquid 3 flowing out of each of the discharge ports 31 , 32 , 33 , and 34 . Alternatively, in the middle of the pipes 51, 52, 53, 54 connecting the discharge ports 31, 32, 33, 34 and the tank 22, a device for controlling the flow rate (outflow amount adjustment) of the coating solution 3 ( For example, a pump) may be provided, and in this case, this device functions as a control device for adjusting discharge of the coating liquid 3 to flow out from the slit 12 .

Moreover, this coating apparatus 1 is equipped with the sensor 36 which measures the film thickness of the coating liquid 3 apply|coated on the base material 2 (refer FIG. 1). A plurality of sensors 36 may be formed along the width direction. The sensor 36 is non-contact and can measure the film thickness of the coating liquid 3 on the substrate 2 at a plurality of points along the width direction or over the entire length in the width direction (TD), and the measurement result is a coating device ( 1) is output to the control device (computer) 37 equipped with. The controller 37 adjusts the opening degrees of the valves 61, 62, 63 and 64 by performing feedback control based on the measurement result from the sensor 36. In short, according to the measurement result of the film thickness of the coating liquid 3, the controller 37 outputs a control signal to the valves 61, 62, 63, and 64, respectively, so that the valves 61, 62, 63, and 64 ) Adjust each opening. This makes it possible to keep the film thickness of the coating liquid 3 constant in the width direction.

Moreover, you may control the opening degree of the valves 61, 62, 63, 64 by the timer function which the control apparatus 37 has instead of the sensor 36. In short, since precipitation or aggregation of the solid components of the coating liquid 3 becomes a problem when a certain time elapses from the start of application, a predetermined time before this time elapses is measured by a timer, and when the predetermined time elapses, control The apparatus 37 may perform control to increase the opening degree of the valves 61, 62, 63, and 64.

Moreover, in Example 1, although the number of discharge ports was set to 4, it is not necessarily limited to this and can change suitably. For example, it may be 2 or 3, or may be 5 or more, and an arbitrary number may be used depending on the strictness of the length and film thickness management of the die 10 in the width direction (TD).

Further, in Example 1, the cross sections of the pipes 51, 52, 53, and 54 were circular, but they are not necessarily limited to this, and appropriate changes are possible. For example, it is made into a long hole shape or a rectangular shape, it is made into the same shape as the cross section of the discharge ports 31, 32, 33, and 34, and the discharge ports 31, 32, 33, and 34 are not tapered, and the piping ( 51, 52, 53, 54) may be configured to be connected.

(Modified Example) The shape of the discharge port in the modified example will be described. Fig. 5 is a diagram explaining an exhaust port in a modified example, wherein (a) is a top view, (b) is a B-B sectional view of (a), and (c) is a C-C sectional view of (a). Since all of the discharge ports 31, 32, 33, and 34 have the same shape, the discharge port 32 will be described as an example.

The cross section of the opening on the slit 12 side of the discharge port 32 in the modified example has the shape of a long hole having a dimension longer in the transverse direction TD than in the direction orthogonal to the transverse direction TD. In addition, the length of the cross section of the opening section on the slit 12 side of the discharge port 32 in the width direction (TD) is longer than the diameter of the pipe 52, and the length in the direction orthogonal to the width direction (TD) is the pipe 52 is shorter than the diameter of And the end part on the side opposite to the slit 12 side also has the shape of a long hole with the dimension longer in the width direction TD than the direction orthogonal to the width direction TD. In addition, the length of the end of the discharge port 32 on the side opposite to the slit 12 side in the width direction (TD) is longer than the diameter of the pipe 52, and the length in the direction orthogonal to the width direction (TD) is the pipe 52 ) is shorter than the diameter of In short, the discharge port 32 of the modified example does not have a taper shape from a long hole shape to a circular shape in order to be connected to the pipe 52 having a circular cross section, but has a pipe having a long hole shape in cross section. Except for the part connected to (52), it has a bottom.

Therefore, the connection part of the discharge port 32 and the pipe 52 of a modified example is discontinuous. Therefore, at the bottom portion of the discharge port 32 of the modified example, the flow velocity of the coating liquid 3 is disturbed, but since it is far from the slit 12, the influence is small, and no coating streaks occur on the coated surface. . However, since the connection portion between the discharge port 32 and the pipe 52 becomes discontinuous, the coating liquid 3 remains, so even if the discharge port 32 is tapered and connected to the pipe 52, the point of discontinuity It is more preferable not to form.

Further, in the modified example in Example 1, the length of the cross section of the opening on the slit 12 side of the discharge port 32 in the direction perpendicular to the width direction (TD) has a dimension shorter than the diameter of the pipe 52 Although it was set as the shape, it is not necessarily limited to this and can change suitably. For example, the length in the direction orthogonal to the width direction TD may be the same as the diameter of the pipe 52.

Thus, in Example 1, the first manifold is connected to the first manifold via a slit that is wide in the width direction and is connected to the first manifold, which is long in the width direction and is composed of a space for storing the coating liquid, and discharges the coating liquid to the substrate. and a plurality of discharge ports formed in the width direction between the first manifold of the slit and the discharge port for discharging the coating liquid, and an inlet portion communicating with the first manifold. A supply means for supplying the coating liquid to the manifold is provided, and an end surface of the opening on the slit side in the discharge port has a wide width shape having a dimension longer in the width direction than in a direction orthogonal to the width direction. Since local flux fluctuations can be dispersed by the coating device, it is possible to coat a coated film in which coating streaks do not occur.

In addition, a coating liquid stored in a first manifold formed on a die that is long in the width direction is discharged from a discharge port connected to the first manifold via a wide slit in the width direction to apply the coating solution to a base material. As a coating method, A plurality of openings on the side of the slit in the discharge port for discharging the coating liquid are formed between the first manifold and the discharge port of the slit in the width direction, and are formed in a plurality in the width direction rather than in a direction orthogonal to the width direction. A coating film in which coating streaks do not occur can be coated by a coating method characterized by dispersing local fluctuations in flow velocity by forming a wide shape with a longer dimension.

Example 2

Embodiment 2 of the present invention differs from Embodiment 1 in that a second manifold is formed in the die and an opening on the slit side of the discharge port is formed in the second manifold. Example 2 is described with reference to FIG. 6 . Fig. 6 is a diagram for explaining the schematic configuration of a coating device in Example 2 of the present invention.

In Example 2, as shown in Fig. 6, a second manifold 24 is formed in the middle of the slit 12 (between the first manifold 11 and the discharge port 18), and this second manifold Discharge ports 31, 32, 33 and 34 are formed in the fold 24.

The length of the second manifold 24 in the width direction TD is equal to that of the first manifold 11 and the slit 12 , and the cross-sectional area in the width direction is smaller than that of the first manifold 11 . That is, the volume is smaller than that of the first manifold 11 .

Openings on the slit side of the discharge ports 31, 32, 33, 34 are formed in the second manifold 24. Also in Example 2, the cross section of the opening on the slit 12 side of the discharge port 32 has the shape of a long hole having a dimension longer in the transverse direction TD than in the direction orthogonal to the transverse direction TD. have. On the other hand, the end of the discharge port 32 on the side opposite to the slit 12 side is connected to the pipe 52 having a circular cross section. Since the cross-sectional shape of the pipe 52 is circular, the discharge port 32 is tapered from a wide long hole shape to a circular shape so that the connection portion of the discharge port 32 with the pipe 52 is circular. It has a configuration (see Fig. 4 (b), (c)). This makes it possible to smoothly connect to the piping 52 having a circular cross section while suppressing fluctuations in the local flow velocity in the discharge port 32 .

By forming the discharge ports 31, 32, 33, 34 in the second manifold 24 in this way, if the discharge ports 31, 32, 33, 34 are directly formed in the slit 12, the sensitivity of flow rate adjustment is increased. When it is too good and it is difficult to control the discharge amount of the coating liquid 3 from the discharge port 18, the adjustment sensitivity can be appropriately relaxed to facilitate the control of the discharge amount of the coating liquid 3.

Thus, in Example 2, a second manifold elongated in the width direction is formed between the first manifold of the slit and the discharge port, and the opening on the slit side of the discharge port is By being formed in the second manifold, it is possible to easily adjust the discharge flow rate and to apply a coating film in which coating streaks do not occur.

INDUSTRIAL APPLICABILITY The present invention can be widely applied to a coating device and a coating method for coating a substrate with a coating liquid.

1: coating device
2: Substrate
3: paint
5 : Roller
10: die
11: first manifold
12: slit
16: inlet
17: Bottom
18: discharge port
20: supply means
22 : tank
23: pump
31: discharge port
32: discharge port
33: discharge port
34: discharge port
36: sensor
37: control device
61: valve
62: valve
63: valve
64: valve

Claims (5)

A first manifold that is long in the width direction and constitutes a space for storing the coating liquid, and a discharge port connected to the first manifold via a slit wide in the width direction and discharging the coating liquid to the base material; 1 die formed in plurality in the width direction between the manifold and the discharge port and having a discharge port through which the coating liquid is discharged;
a supply means for supplying a coating liquid to the first manifold from an inlet communicating with the first manifold;
The coating device characterized in that the cross section of the opening on the side of the slit in the discharge port has a wide width shape having a dimension longer in the width direction than in a direction orthogonal to the width direction. According to claim 1,
A second manifold elongated in the width direction is formed between the first manifold of the slit and the discharge port, and the opening on the slit side of the discharge port is formed in the second manifold. A characterized coating device. According to claim 1 or 2,
The coating device characterized in that the wide shape is a long hole having a dimension longer in the width direction than in a direction orthogonal to the width direction. According to claim 1 or 2,
The end portion of the discharge port on the side opposite to the opening on the slit side is connected to a pipe having a circular cross section, and the discharge port has the wide shape so that the cross section at the connection portion with the pipe has a circular shape. A coating device characterized by forming a tapered shape in the circular shape. A coating method in which a coating liquid stored in a first manifold formed on a die that is long in the width direction is discharged from a discharge port connected to the first manifold via a slit wide in the width direction to apply the coating liquid to a base material,
A plurality of openings on the side of the slit in the discharge port for discharging the coating liquid are formed between the first manifold and the discharge port of the slit in the width direction, and are formed in a plurality in the width direction rather than in a direction orthogonal to the width direction. A coating method characterized by dispersing local flux fluctuations by forming a wide shape with a longer dimension.

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