JP6808505B2 - Coating equipment and coating method - Google Patents

Description

The present invention relates to a coating apparatus and a coating method for forming a coating film by applying a coating liquid to a base material.

Conventionally, in order to apply a coating liquid to a long base material, the coating liquid supplied by a pump is discharged from a slit of a die in the width direction and applied to a uniform thickness. ing. For example, Patent Document 1 has a configuration in which the thickness of the coating film (coating film) formed on the substrate is made uniform even if the slurry (coating liquid) is continuously discharged for a long time. Have been described.

Patent Document 1: Japanese Unexamined Patent Publication No. 2015-097198

However, in the case described in Patent Document 1, the coating liquid is supplied from the tank by a pump, and the non-uniform excess coating liquid in the die is returned from the die to the tank. Therefore, the flow rate from the pump is adjusted according to the return amount. There was a problem that it was difficult to control the amount of coating liquid (coating amount). In addition, the coating liquid returned to the tank may have changed properties such as viscosity, which has a problem of affecting the quality of the coating film.

An object of the present invention is to solve the above problems and to form a coating film having a uniform thickness without returning the coating liquid supplied to the die to the tank.

In order to solve the above problems, the present invention is a coating device for forming a coating film by applying a coating liquid to a base material.
A die having a manifold for storing the coating liquid long in the width direction and a discharge port for discharging the coating liquid to the base material via a slit wide in the width direction connected to the manifold.
A supply means for supplying a coating liquid to the manifold from an inflow portion communicating with the manifold.
A coating liquid temperature control means for controlling the temperature of the coating liquid for each divided region whose width direction is divided into a plurality of regions is provided .
The coating liquid temperature control means provides a coating apparatus characterized in that it is provided in the space of the manifold .

With this configuration, the viscosity of the coating liquid can be changed to change the discharge amount by controlling the coating liquid temperature, and a coating film of uniform thickness is formed without returning the coating liquid supplied to the die to the tank. can do.
Further, since the temperature in the vicinity of the slit is not directly controlled, the coating liquid temperature can be controlled without being accompanied by thermal deformation of the slit.

Further, the coating liquid temperature control means may be provided in the vicinity of the slit in at least one of the two divided bodies arranged so as to form the slit.

With this configuration, the coating liquid temperature immediately before discharge can be controlled, and the viscosity of the coating liquid can be effectively changed.

One of the two divided bodies is provided with a coating liquid temperature controlling means composed of a plurality of heating mechanisms, and the other of the two divided bodies is provided with a coating liquid temperature controlling means composed of a plurality of endothermic mechanisms. It may be configured.

With this configuration, the coating liquid temperature immediately before discharge can be effectively controlled in the width direction, and the viscosity of the coating liquid can be effectively changed.

The coating film thickness measuring means for measuring the thickness of the coating film is provided, and the coating liquid temperature controlling means measures the temperature of the coating liquid based on the coating film thickness measured by the coating film thickness measuring means. It may be configured to be controlled.

With this configuration, the discharge amount of the coating liquid can be changed based on the coating film thickness, and the uniformity of the coating film thickness can be improved.

Further, in order to solve the above problems, the present invention is a coating device for forming a coating film by applying a coating liquid to a base material.
A die having a manifold for storing a coating liquid long in the width direction and a discharge port for discharging the coating liquid to the base material via a slit wide in the width direction connected to the manifold.
A supply means for supplying a coating liquid to the manifold from an inflow portion communicating with the manifold.
A coating liquid temperature control means for controlling the temperature of the coating liquid for each divided region whose width direction is divided into a plurality of regions is provided.
The coating liquid temperature control means includes a plurality of heating mechanisms provided in the vicinity of the slit in one of the two opposed divided bodies constituting the slit, and the other of the two divided bodies. Provided is a coating device characterized by having a plurality of endothermic mechanisms provided in the vicinity of the slit in the above.

Further, in order to solve the above problems, the present invention is a coating method for forming a coating film by applying a coating liquid to a base material.
The coating liquid is supplied from the supply unit to the manifold composed of the space long in the width direction in the die long in the width direction to store the coating liquid, and the coating liquid is applied through the wide slit in the width direction connected to the manifold. While discharging from the discharge port to the base material,
The present invention provides a coating method characterized in that the temperature of a coating liquid is controlled for each divided region in which the width direction is divided into a plurality of regions by a coating liquid temperature controlling means provided in the space of the manifold. ..

With this configuration, the viscosity of the coating liquid can be changed to change the discharge amount by controlling the coating liquid temperature, and a coating film of uniform thickness is formed without returning the coating liquid supplied to the die to the tank. can do.
Further, since the temperature in the vicinity of the slit is not directly controlled, the coating liquid temperature can be controlled without being accompanied by thermal deformation of the slit.

Further, in order to solve the above problems, the present invention is a coating method in which a coating liquid is applied to a base material to form a coating film.
The coating liquid is supplied from the supply unit to the manifold composed of the space long in the width direction in the die long in the width direction to store the coating liquid, and the coating liquid is applied through the wide slit in the width direction connected to the manifold. While discharging from the discharge port to the base material,
A plurality of heating mechanisms provided in the vicinity of the slit in one of the two opposed divided bodies constituting the slit, and provided in the vicinity of the slit in the other of the two divided bodies. The present invention provides a coating method characterized in that the temperature of a coating liquid is controlled for each divided region in which the width direction is divided into a plurality of regions by a coating liquid temperature controlling means having a plurality of endothermic mechanisms. ..

According to the coating apparatus and coating method of the present invention, a coating film having a uniform thickness can be formed without returning the coating liquid supplied to the die to the tank.

It is a figure explaining the structure of the coating apparatus in Example 1 of this invention. It is sectional drawing of the arrow | view of FIG. It is sectional drawing of b arrow of FIG. It is a top view of the shim plate 15. It is a figure explaining the structure of the die in Example 2 of this invention. FIG. 5 is a cross-sectional view taken along the line c in FIG. It is a figure explaining the structure of the coating apparatus in Example 3 of this invention.

Example 1 of the present invention will be described with reference to FIGS. 1 to 4. FIG. 1 is a diagram illustrating a configuration of a coating device according to a first embodiment of the present invention. FIG. 2 is a cross-sectional view taken along the line a of FIG. FIG. 3 is a cross-sectional view taken along the line b of FIG. FIG. 4 is a plan view of the shim plate 15.

The coating device 1 is a device for applying the coating liquid 3 to the base material 2 sent by roll-to-roll. The coating film formed by applying the coating liquid 3 by the coating device 1 is dried and used in a subsequent process. It is important to control the thickness of the coating film formed on the base material 2. For example, when this coating film is used for the electrode plate of a battery, the coating film thickness control is very important because it directly affects the charge / discharge amount of the battery. According to this coating device 1, as will be described later, the coating liquid 3 is applied with a uniform thickness (uniform coating film amount) along the feeding direction MD of the base material 2. The width direction TD of the base material 2 is a direction orthogonal to the feed direction of the base material 2, and the Y-axis direction in FIG. 1 corresponds to this.

The material of the base material 2 is not particularly limited, and various materials such as metal foil and resin can be selected. Further, the length in the width direction TD (Y direction) is not limited, and one such as 500 to 1500 mm can be selected.

Here, the coating liquid 3 in the present invention is intended for a liquid having a viscosity change with respect to a shear rate (that is, a non-Newtonian fluid). Since the coating liquid 3 has a viscosity change with respect to the shear rate, the viscosity changes and the flow velocity changes by controlling the coating liquid temperature, as will be described later. As a result, the amount of liquid to be applied changes. That is, by controlling the coating liquid temperature, it is possible to control the coating liquid amount to be applied and uniformly control the coating film thickness.

The coating device 1 includes a die 10 formed long along the width direction TD of the base material 2, and a supply means 20 for supplying the coating liquid 3 to the die 10. In the die 10, the longitudinal direction (Y-axis direction in FIG. 1) is referred to as the width direction. The length of the die 10 in the width direction is about 500 to 1500 mm. In this coating device 1, a roller 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 roller 5 are parallel to each other. 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 the coating liquid 3 is applied in this state.

The die 10 in the first embodiment has a first split body 13 having a tapered first lip 13a and a second split body 14 having a tapered second lip 14a, and a shim plate 15 between them. It is composed of a combination of the above and a part of the coating liquid temperature control means 41. FIG. 2 is a cross-sectional view taken along the line a of FIG. FIG. 3 is a cross-sectional view taken along the line b of FIG. 1, and the shim plate 15 is shown in FIG. Inside the die 10, a manifold 11 formed of a space long in the width direction and a slit 12 connected to the manifold 11 are formed, and a slit 12 is formed between the first lip 13a and the second lip 14a. A discharge port 18 which is an open end of the above 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 manifold 11 and then discharged from the discharge port 18 via the slit 12.

As shown in FIGS. 2 and 3, in the coating liquid temperature control means 41, a plurality of heating mechanisms 41a are arranged in the width direction of the die, and the coating liquid 3 is divided into a plurality of regions in the width direction. It is configured to control the temperature. A part of each heating mechanism 41a is sandwiched and fixed to the first divided body 13 and the second divided body 14 together with the slit 15, and most of the heating mechanism 41a is exposed in the space of the manifold 11 and the coating liquid 3 is formed. The temperature can be controlled efficiently. Further, the dimension in the width direction of the coating liquid temperature control means 41 in which the plurality of heating mechanisms 41a are arranged has the same dimension W as the shim plate 15 described later, and the length orthogonal to the width direction is in the space of the manifold 11. It has a length that reaches near the center. The plurality of heating mechanisms 41a are composed of Peltier elements, and the dimensions in the width direction are about 50 to 100 mm. The number of heating mechanisms 41a is not particularly limited, but is limited to several to 20. By the plurality of heating mechanisms 41a, the temperature of the coating liquid 3 can be controlled for each divided region in which the width direction of the manifold 11 is divided into a plurality of regions.

It is known that the coating liquid 3 has a viscosity change with respect to the shear rate, and the viscosity curve changes depending on the temperature. Therefore, by controlling the temperature of the coating liquid 3 (specifically, controlling in the range of room temperature to 60 ° C.) by the coating liquid temperature controlling means 41 (plural heating mechanisms 41a), the coating liquid temperature controlling means 41 passes through. The viscosity of the coating liquid inside changes, and the flow velocity changes (the coating flow rate changes). Therefore, by controlling the temperature of the coating liquid for each of the divided regions divided into a plurality of regions in the width direction of the die 10, it is possible to correct the uneven coating liquid amount and form the coating film having a uniform thickness. it can.

In the control of the coating liquid temperature control means 41 in the first embodiment, the coating liquid temperature near the center in the width direction of the manifold 11 is controlled to be low, the coating liquid temperature near both ends in the width direction of the manifold 11 is controlled to be high, and the vicinity of both ends is controlled. Control the amount of liquid to be applied. This is because the solid components of the coating liquid 3 tend to settle and aggregate in the vicinity of both ends and do not easily flow, and the solid components of the coating liquid 3 do not settle or agglomerate and flow easily in the vicinity of the center. This is to correct the uniformity.

The reason why the solid component of the coating liquid 3 is likely to settle or aggregate at both ends of the manifold 11 is that there are walls forming the widthwise end faces of the manifold 11 at both ends. This is because the coating liquid 3 supplied from the central portion of the manifold 11 of 1 and spreading to both sides in the width direction tends to have a low flow velocity at both ends and the coating liquid 3 tends to stay. In particular, in a coating liquid having a high viscosity (for example, when the viscosity is several thousand to several tens of thousands cP (when the shear rate = 1)), solid components tend to stay at both ends and precipitate or aggregate.

The slit 12 is formed long in the width direction like the manifold 11, and the width direction dimension of the slit 12 is determined by the inner dimension W (see FIG. 4) of the shim plate 15 described later, and the width direction dimension of the slit 12 is determined. The coating liquid 3 having substantially the same width direction can be applied onto the base material 2. The gap dimension (height dimension) of the slit 12 is, for example, 0.4 to 1.5 mm. In the first embodiment, the die 10 is installed in a posture in which the gap direction of the slit 12 is the vertical direction and the width direction is the horizontal direction. That is, the die 10 is installed in a posture in which the manifold 11 and the slit 12 are arranged side by side in the horizontal direction. Therefore, the direction in which the coating liquid 3 stored in the manifold 11 flows to the base material 2 through the slit 12 and the discharge port 18 is the horizontal direction.

In the first embodiment, the die 10 is installed horizontally so that the coating liquid 3 flows in the horizontal direction, but the present invention is not limited to this and can be changed as appropriate. For example, the die 10 may be installed vertically so that the coating liquid 3 flows upward or downward, or the die 10 may be installed at an angle from a horizontal plane so that the coating liquid 3 flows diagonally. You may. That is, the installation direction of the die 10 can be set arbitrarily. Further, the roller 5 may not be located at a position facing the discharge port 18 of the die 10. At least the base material 2 may be arranged so as to face the discharge port 18.

An inflow portion 16 is provided at the central portion in the width direction of the die 10, and the inflow portion 16 is composed of a through hole (inflow port) connecting the outside of the die 10 to the manifold 11. The supply means 20 passes the inflow pipe 21 having one end connected to the inflow portion 16, the tank 22 storing the coating liquid 3, and the coating liquid 3 in the tank 22 through the inflow pipe 21 to die 10. It has a pump 23 for supplying to. From the above, the supply means 20 can supply the coating liquid 3 to the manifold 11 from the inflow portion 16. In the first embodiment, as shown in FIG. 1, the inflow portion 16 is connected to the bottom portion 17 of the manifold 11, and the coating liquid 3 is allowed to flow in from the bottom portion 17.

Then, the manifold 11 can store the coating liquid 3 supplied from the supply means 20, and the coating liquid 3 stored in the manifold 11 is sent from the discharge port 18 through the slit 12 in a roll-to-roll manner. The coating liquid 3 can be continuously applied to the base material 2 by discharging the material 2 while controlling the viscosity by controlling the coating liquid temperature. The gap size of the slit 12 is constant in the width direction, and the thickness of the coating liquid 3 applied on the base material 2 is constant in the width direction.

In Example 1, the coating liquid temperature control means 41 was composed of a plurality of heating mechanisms 41a. When the coating liquid 3 is heated and discharged onto the base material 2 to form a coating film, it is expected that the temperature rising time in the drying step of the subsequent step will be shortened. However, the coating liquid temperature control means 41 is not necessarily configured by a plurality of heating mechanisms 41a, and can be appropriately changed. For example, the coating liquid temperature control means 41 may be configured by a plurality of endothermic mechanisms having a cooling function, or may be configured by combining a heating mechanism and a heat absorbing mechanism.

When the coating liquid temperature control means 41 is composed of a plurality of endothermic mechanisms having a cooling function, it is preferable to heat the coating liquid 3 supplied to the die 10 in advance. On the contrary, when the liquid temperature control means 41 is composed of a plurality of heating mechanisms, the coating liquid 3 supplied to the die 10 may be cooled in advance.

Further, in the first embodiment, the coating liquid temperature control means 41 is provided in the space of the manifold 11, but the present invention is not necessarily limited to this and can be appropriately changed. For example, it may be provided near the manifold 11 inside the first divided body 13 or the second divided body 14, or may be provided near the manifold 11 inside both the first divided body 13 and the second divided body 14.

Further, in the first embodiment, the plurality of heating mechanisms 41a are composed of Peltier elements, but the present invention is not necessarily limited to this, and can be appropriately changed. For example, a mica heater or other heat transfer element may be used.

In this way, the slit is provided in the space of the manifold 11 or in the vicinity of the manifold 11 in the first divided body 13 or the second divided body 14, and the temperature of the coating liquid 3 is controlled at a place away from the slit 12. The 12 is less affected by heat, and it is possible to prevent the gaps between the slits 12 from becoming large or small and the thickness of the coating film from becoming uneven.

As described above, in the first embodiment, the coating device is a coating device for applying a coating liquid to a base material to form a coating film, and is connected to a manifold having a space for storing the coating liquid long in the width direction and the manifold. A die having a die having a discharge port for discharging the coating liquid to the base material via a slit wide in the width direction and an inflow portion communicating with the manifold supply the coating liquid to the manifold. The coating liquid temperature is controlled by a coating apparatus including a supply means and a coating liquid temperature controlling means for controlling the temperature of the coating liquid for each divided region whose width direction is divided into a plurality of regions. As a result, the viscosity of the coating liquid can be changed to change the discharge amount, and a coating film having a uniform thickness can be formed without returning the coating liquid supplied to the die to the tank.

Further, in the first embodiment, a coating method is used in which a coating liquid is applied to a base material to form a coating film, from a supply unit to a manifold having a long space in the width direction on a die long in the width direction. The coating liquid is supplied, the coating liquid is stored, and the coating liquid is discharged to the base material from the discharge port via the wide slit in the width direction connected to the manifold, and the coating liquid temperature control means is used. By a coating method characterized by controlling the temperature of the coating liquid for each divided region in which the width direction is divided into a plurality of regions, the viscosity of the coating liquid is changed and the discharge amount is changed by controlling the coating liquid temperature. It is possible to form a coating film having a uniform thickness without returning the coating liquid supplied to the die to the tank.

In the second embodiment of the present invention, in the die of the coating apparatus, the coating liquid temperature control means is provided in the vicinity of the slit of at least one of the two divided bodies arranged to form the slit. Is different from Example 1. The second embodiment will be described with reference to FIGS. 5 and 6. FIG. 5 is a diagram illustrating a die configuration according to a second embodiment of the present invention. FIG. 6 is a cross-sectional view taken along the line c of FIG.

The die 110 of the coating device 101 in the second embodiment includes a coating liquid temperature controlling means 151 in addition to the coating liquid temperature controlling means 41. The coating liquid temperature control means 151 includes a plurality of heating mechanisms 151a and a plurality of endothermic mechanisms 151b. That is, the plurality of heating mechanisms 151a are provided in the vicinity of the slit 12 in the first partition body 13. Specifically, a plurality of heating mechanisms 151a are slightly installed in the width direction (Y direction) from the slit 12 in the first divided body 13 so as to control the temperature of the coating liquid for each divided region whose width direction is divided into a plurality of regions. It is embedded in the place inside. That is, if the surface of the first partition 13 forming the slit 12 is uneven, the flow of the coating liquid 3 is hindered and the amount of the coating liquid is affected. Therefore, the heating mechanism 151a is made so that the surface forming the slit 12 becomes smooth. Is embedded inside the first partition body 13.

Similarly, the plurality of heat absorbing mechanisms 151b are provided in the vicinity of the slit 12 in the second divided body 14. Specifically, a plurality of endothermic mechanisms 151b in the width direction (Y direction) are slightly smaller than the slit 12 in the second divided body 14 so as to control the temperature of the coating liquid for each divided region in which the width direction is divided into a plurality of regions. It is embedded in the place inside (see FIGS. 5 and 6).

The control of the coating liquid temperature control means 151 in the second embodiment controls the coating liquid temperature near the center in the width direction of the slit 12 to be low, and controls the coating liquid temperature near both ends in the width direction of the slit 12 to be high to be near both ends. Control so that the amount of the coating liquid is large. This is because the solid component of the coating liquid 3 tends to settle and aggregate in the vicinity of both ends of the slit and does not easily flow, and the solid component of the coating liquid 3 tends to flow in the vicinity of the center without precipitation or agglomeration. This is to correct the non-uniformity of.

In the second embodiment, the coating liquid temperature controlling means 151 is provided in addition to the coating liquid temperature controlling means 41, but the present invention is not limited to this and can be appropriately changed. For example, the coating liquid temperature control means 41 may not be provided, but only the coating liquid temperature control means 151 may be provided. Further, although the coating liquid temperature control means 151 is provided in the first divided body 13 and the second divided body 14 constituting the slit 12, the present invention is not necessarily limited to this, and changes can be made as appropriate. For example, the coating liquid temperature control means including a plurality of heating mechanisms or a plurality of endothermic mechanisms may be provided only in one of the divided bodies. That is, the coating liquid temperature control means may be provided in the vicinity of the slit in at least one of the two divided bodies arranged so as to form the slit 12.

Further, in the second embodiment, in order to smooth the surface constituting the slit 12, a plurality of heating mechanisms 151a are embedded in a place slightly inside the slit 12 in the first partition body 13, and a plurality of heat absorbing mechanisms are installed. 151b is embedded in a place slightly inside the slit 12 in the second divided body 14, but the present invention is not necessarily limited to this and can be changed as appropriate. For example, if the surfaces of the heating mechanism 151a and the heat absorbing mechanism 151b are smooth, they may be provided directly on the surface forming the slit 12 without being embedded inside the first divided body 13 and the second divided body 14.

Here, since the coating liquid temperature control means 151 is provided in the vicinity of the slit, it is easy to directly control the coating liquid temperature to be discharged, but as described above, the gap size of the slit is affected by the heat. It may change and the coating film thickness may become uneven. Therefore, it is desirable to control the heating temperature or the endothermic temperature while measuring the temperature of the coating liquid or the slit so that there is no excessive heating or endothermic heat.

As described above, in the second embodiment, the coating liquid temperature control means is provided in the vicinity of the slit in at least one of the two divided bodies arranged so as to form the slit, and immediately before the discharge. The coating liquid temperature can be controlled, and the viscosity of the coating liquid can be effectively changed.

Example 3 of the present invention is different from Example 1 in that it includes a sensor for measuring the film thickness (coating film thickness) of the coating liquid applied on the substrate. The third embodiment will be described with reference to FIG. FIG. 7 is a diagram illustrating a configuration of a coating device according to a third embodiment of the present invention.

As shown in FIG. 7, a sensor 236 for measuring the film thickness (coating film thickness) of the coating liquid 3 is provided. A plurality of sensors 236 are provided along the width direction, and a plurality of film thickness measurement results can be obtained in the width direction. The sensor 236 is composed of a non-contact optical displacement sensor. Then, the film thickness of the coating liquid 3 on the base material 2 is measured at a plurality of locations along the width direction, and the plurality of measurement results are output to the control unit (computer) 37 provided in the coating device 201. The control unit 237 performs feedback control based on a plurality of measurement results in the width direction from the sensor 236, and adjusts the coating liquid temperature control means 41. That is, the control unit 237 outputs a control signal to each of the plurality of heating mechanisms 41a constituting the coating liquid temperature control means 41 according to the measurement result of the film thickness of the plurality of coating liquids 3 in the width direction, and outputs the control signal to the width. The coating liquid temperature is controlled by adjusting the heating temperature of each of the plurality of heating mechanisms 41a for each divided region divided into a plurality of regions in the direction. As a result, the viscosity of the coating liquid 3 changes for each of the plurality of divided regions divided in the width direction, so that the flow velocity changes for each divided region, and the film thickness of the coating liquid 3 can be kept constant in the width direction. It becomes.

The feedback control based on the measurement result of the sensor 236 specifically means that if the measured thickness of the coating film is smaller than a predetermined value, the heating temperature is raised with respect to the heating mechanism 41a corresponding to the divided region. If it is larger than a predetermined value, the heating temperature is controlled to be lowered with respect to the heating mechanism 41a corresponding to the divided region. As a result, the viscosity of the coating liquid can be increased in the region where the coating film thickness is small to increase the coating liquid amount, and the viscosity of the coating liquid can be decreased in the region where the coating film thickness is large to increase the coating liquid amount. Can be reduced, and a uniform coating film thickness can be obtained over the entire width direction.

Here, the arrangement position and number of the heating mechanism 41a and the measurement position and number of measurement points of the sensor 236 do not have to match. The heating mechanism 41a of the divided region at the position closest to the measurement position of the sensor 236 may be controlled.

In the third embodiment, a plurality of sensors 236 are provided in the width direction, but the present invention is not limited to this and can be changed as appropriate. For example, a sensor 236 may be provided in a moving means such as a robot and moved in the width direction to measure the film thickness at a plurality of locations.

When a plurality of heating mechanisms 151a or a plurality of endothermic mechanisms 151b are provided in the vicinity of the slit such as the above-mentioned coating liquid temperature control means 151, feedback control is performed based on the measurement result from the sensor 236 to heat each of them. The coating liquid temperature may be controlled by controlling the heating temperature of the mechanism 151a or the endothermic temperature of the endothermic mechanism 151b.

Further, in the third embodiment, the sensor 236 is composed of an optical displacement sensor, but the present invention is not necessarily limited to this, and changes can be made as appropriate. For example, the sensor 236 may be configured by an X-ray film thickness meter or a β-ray film thickness meter, or may be configured by an ultrasonic film thickness meter. When it is composed of an X-ray film thickness meter or a β-ray film thickness meter, a floodlight and a receiver may be installed with the base material 2 and the coating liquid 3 sandwiched between them.

As described above, in the third embodiment, the coating film thickness measuring means for measuring the thickness of the coating film is provided, and the coating liquid temperature controlling means is based on the coating film thickness measured by the coating film thickness measuring means. Therefore, by controlling the temperature of the coating liquid, the discharge amount can be changed for each of a plurality of regions based on the coating film thickness, and the uniformity of the coating film thickness can be improved.

The coating apparatus and coating method in the present invention can be widely used in the field of applying a coating liquid to a base material to form a coating film.

1: Coating device 2: Base material 3: Coating liquid 5: Roller 10: Die 11: Manifold 12: Slit 13: First split body 13a: First lip 14: Second split body 14a: Second lip 15: Sim Plate 16: Inflow part 17: Bottom 18: Discharge port 20: Supply means 21: Inflow pipe 22: Tank 23: Pump 41: Coating temperature control means 41a: Heating mechanism 101: Coating device 110: Die 151: Coating temperature Control means 151a: Heating mechanism 151b: Heat absorption mechanism 201: Coating device 236: Sensor 237: Control unit

Claims (7)

A coating device that applies a coating liquid to a base material to form a coating film.
A die having a manifold for storing the coating liquid long in the width direction and a discharge port for discharging the coating liquid to the base material via a slit wide in the width direction connected to the manifold.
A supply means for supplying a coating liquid to the manifold from an inflow portion communicating with the manifold.
A coating liquid temperature control means for controlling the temperature of the coating liquid for each divided region whose width direction is divided into a plurality of regions is provided .
A coating device characterized in that the coating liquid temperature controlling means is provided in the space of the manifold . Further, the first aspect of the present invention is characterized in that the coating liquid temperature control means is provided in the vicinity of the slit in at least one of the two divided bodies arranged so as to form the slit. Coating equipment. One of the two divided bodies is provided with a coating liquid temperature controlling means composed of a plurality of heating mechanisms, and the other of the two divided bodies is provided with a coating liquid temperature controlling means composed of a plurality of endothermic mechanisms. The coating apparatus according to claim 2 , wherein the coating apparatus is characterized by the above. A coating film thickness measuring means for measuring the thickness of the coating film is provided, and the coating liquid temperature controlling means measures the temperature of the coating liquid based on the coating film thickness measured by the coating film thickness measuring means. The coating apparatus according to any one of claims 1 to 3 , wherein the coating apparatus is controlled. A coating device that applies a coating liquid to a base material to form a coating film.
A die having a manifold for storing a coating liquid long in the width direction and a discharge port for discharging the coating liquid to the base material via a slit wide in the width direction connected to the manifold.
A supply means for supplying a coating liquid to the manifold from an inflow portion communicating with the manifold.
A coating liquid temperature control means for controlling the temperature of the coating liquid for each divided region whose width direction is divided into a plurality of regions is provided.
The coating liquid temperature control means includes a plurality of heating mechanisms provided in the vicinity of the slit in one of the two opposed divided bodies constituting the slit, and the other of the two divided bodies. A coating device having a plurality of endothermic mechanisms provided in the vicinity of the slit in the above. It is a coating method in which a coating liquid is applied to a base material to form a coating film.
The coating liquid is supplied from the supply unit to the manifold composed of the space long in the width direction in the die long in the width direction to store the coating liquid, and the coating liquid is applied through the wide slit in the width direction connected to the manifold. While discharging from the discharge port to the base material,
A coating method characterized in that the temperature of a coating liquid is controlled for each divided region in which the width direction is divided into a plurality of regions by a coating liquid temperature controlling means provided in the space of the manifold . It is a coating method in which a coating liquid is applied to a base material to form a coating film.
The coating liquid is supplied from the supply unit to the manifold composed of the space long in the width direction in the die long in the width direction to store the coating liquid, and the coating liquid is applied through the wide slit in the width direction connected to the manifold. While discharging from the discharge port to the base material,
A plurality of heating mechanisms provided in the vicinity of the slit in one of the two opposed divided bodies constituting the slit, and provided in the vicinity of the slit in the other of the two divided bodies. A coating method characterized in that the temperature of a coating liquid is controlled for each of the divided regions whose width direction is divided into a plurality of regions by a coating liquid temperature controlling means having a plurality of endothermic mechanisms.

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