TWI641427B - Coating liquid coating device and coating method for curved substrate - Google Patents

Abstract

A coating device for a coating liquid for a curved substrate, which comprises: a storage tank for storing the coating liquid; a slit nozzle for coating the coating liquid on the curved substrate; and a supplying part for coating the liquid from the storage tank to the slit nozzle. The control unit controls the coating device. The control unit controls the supply unit such that the supply pressure or supply amount of the coating liquid to the slit nozzle is constant. Furthermore, the movement speed of the slit nozzle is controlled from the slit. The slit nozzle is controlled so that the distance from the tip end portion of the nozzle to the coating surface of the curved substrate is inversely proportional.

Description

Coating liquid coating device and coating method for curved substrate Field of invention

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

Background of the invention

In recent years, in the market of display panels, the demand for sheet-side convex glass with a convex curved surface and a flat surface at the back has gradually increased. The manufacture of the sheet-side convex glass is continued on the back (concave curved surface) of the convex curved glass. The agent is applied evenly and bonded to a flat glass.

Conventionally, when a coating liquid such as an adhesive is to be applied to flat glass, a table coater as shown in Patent Document 1 is used. In addition, when a coating liquid such as an adhesive is to be applied to a concave curved surface, there is a coating method using an arc-shaped nozzle as shown in Patent Document 2 or the most on the concave curved surface as shown in Patent Document 3. A method in which the upper part is coated and the coating liquid is moved on the concave curved surface due to its own weight.

Advance technical literature Patent literature

[Patent Document 1] Japanese Patent Laid-Open No. 2002-200450

[Patent Document 2] Japanese Patent Laid-Open No. 2004-167422

[Patent Document 3] Japanese Patent Application Laid-Open No. 2011-256060

Summary of invention

However, all of the methods described above are difficult to apply when the coating liquid is applied to the concave curved surface so that the upper surface of the applied coating liquid becomes flat.

Then, an object of the present invention is to provide a coating liquid coating device and a coating method for making the upper surface of the coated coating liquid flat when the coating liquid is coated on a curved substrate.

The first invention of the present application is a coating liquid coating device for a curved substrate, which includes a storage tank for storing the coating liquid, a slit nozzle for coating the coating liquid on the curved substrate, and a supply unit. Supplying the coating liquid from the storage tank to the slit nozzle; and a control unit that controls the coating device; the control unit controls the supply unit so that the supply pressure of the coating liquid that is supplied to the slit nozzle is constant, and The slit nozzle is controlled such that a moving speed of the slit nozzle is inversely proportional to a distance from a slit front end portion of the slit nozzle to a coating surface of the curved substrate.

According to the foregoing configuration, in a state where the supply pressure of the coating liquid to the slit nozzle is constant, the slit nozzle is controlled so that the moving speed of the slit nozzle is inversely proportional to the distance from the slit tip to the curved substrate. By slitting the nozzle, the coating liquid can be applied to the curved substrate so that the upper surface of the coating liquid becomes flat.

The second invention of the present application is a coating liquid coating device for a curved substrate, which includes a storage tank that stores the coating liquid, a slit nozzle that applies the coating liquid to the curved substrate, and a supply unit. Supplying the coating liquid from the storage tank to the slit nozzle; and a control unit that controls the coating device; the control unit controls the supply unit so that a supply amount of the coating liquid that is supplied to the slit nozzle is constant, and The slit nozzle is controlled such that a moving speed of the slit nozzle is inversely proportional to a distance from a slit front end portion of the slit nozzle to a coating surface of the curved substrate.

According to the foregoing configuration, the slit is controlled so that the moving speed of the slit nozzle is inversely proportional to the distance from the tip of the slit to the curved substrate while the supply amount of the coating liquid to the slit nozzle is constant. By slitting the nozzle, the coating liquid can be applied to the curved substrate so that the upper surface of the coating liquid becomes flat.

The first invention and the second invention preferably have the following configurations.

(1) The coating surface of the curved substrate has a concave curved surface.

According to the said structure (1), an adhesive agent can be apply | coated to a concave curved surface as a coating liquid, and an adhesive agent can be apply | coated to a concave curved surface so that the upper surface of an adhesive agent may become flat. As a result, the bonding of the convex curved glass and the flat glass becomes easy, and the sheet-side convex glass can be easily formed.

The third invention of the present application is a method for applying a coating liquid to a curved substrate, characterized in that the supply pressure of the coating liquid to be supplied to a slit nozzle is constant, and the slit nozzle is to apply the coating liquid On the curved substrate, the moving speed of the slit nozzle is made inversely proportional to the distance from the front end of the slit of the slit nozzle to the coating surface of the curved substrate, to move the slit nozzle.

According to the aforementioned configuration, the slit nozzle can be moved in an inversely proportional manner to the distance from the front end of the slit to the curved substrate while the supply pressure of the coating liquid to the slit nozzle is constant. The coating liquid is applied to a curved substrate so that the upper surface of the coating liquid becomes flat.

The fourth invention of the present application is a method for applying a coating liquid to a curved substrate, characterized in that the supply amount of the coating liquid to be supplied to a slit nozzle is constant, and the slit nozzle is to apply the coating liquid On the curved substrate, the moving speed of the slit nozzle is made inversely proportional to the distance from the front end of the slit of the slit nozzle to the coating surface of the curved substrate, to move the slit nozzle.

According to the foregoing configuration, the supply of the coating liquid to the slit nozzle is supplied. The slit nozzle is moved in a manner inversely proportional to the distance from the front end of the slit to the curved base material under a given amount of the feed, whereby the curved base can be applied to the curved surface so that the upper surface of the coating liquid becomes flat. Wood coating solution.

In summary, according to the present invention, it is possible to provide a coating liquid coating apparatus and a coating method that make the upper surface of the coated coating liquid flat when the coating liquid is coated on a curved substrate.

1‧‧‧ storage tank

2‧‧‧ holding tray

3‧‧‧Slot Nozzle

3a‧‧‧Slit front end

3b‧‧‧Eject

4‧‧‧ Supply Department

10‧‧‧ Coating device

11‧‧‧ curved substrate

11a‧‧‧ coated surface

12‧‧‧ Two-way valve

20‧‧‧units

21‧‧‧Clamping member

21a‧‧‧Vertical section

21b‧‧‧Horizontal Section

22‧‧‧Clamping member

23‧‧‧ supporting components

23a‧‧‧Support Department

23b‧‧‧ Empowerment

23c‧‧‧tubular member

24‧‧‧ supporting components

25‧‧‧ clamping member

26‧‧‧Clamping member

27‧‧‧ supporting components

28‧‧‧ supporting components

43‧‧‧ Motor

44‧‧‧ Syringe Pump

45‧‧‧The first supply line

48‧‧‧Three-way valve

49‧‧‧ 2nd supply line

201‧‧‧ Ball Screw

202‧‧‧handle

203‧‧‧mobile station

A‧‧‧ length

B‧‧‧ length

C‧‧‧ length

D‧‧‧The distance from the front end of the slit nozzle to the coating surface of the curved substrate

X‧‧‧ direction

Y‧‧‧ direction

[Fig. 1] A schematic view of a coating apparatus according to an embodiment of the present invention.

[Fig. 2] A schematic perspective view of the vicinity of a slit nozzle portion.

[Fig. 3] A schematic front view of a holding tray.

[Fig. 4] A graph showing the relationship between the position of the slit nozzle on the curved substrate and the distance from the front end of the slit to the coating surface, the moving speed of the slit nozzle, the discharge amount of the slit nozzle, or the discharge pressure.

[Fig. 5] A diagram corresponding to Fig. 4 showing other embodiments.

[Fig. 6] A diagram corresponding to Fig. 4 showing other embodiments.

Forms used to implement the invention

(Overall composition)

FIG. 1 is a schematic diagram of a coating apparatus 10 according to an embodiment of the present invention. As shown in FIG. 1, the coating apparatus 10 includes a storage tank 1 for storing a coating liquid 1, a slit nozzle 3 for coating the coating liquid on a curved substrate 11 on a holding tray 2, and a coating liquid from the storage tank 1 to the slit nozzle 3. Supply supply part 4, control coating Control unit of the cloth device 10. The slit nozzle 3 is a slit nozzle for a flatbed coating machine. The flatbed coating machine is formed with a slit of a predetermined width for discharging the coating liquid in the nozzle itself, and the coating liquid is coated on the substrate by moving the slit nozzle 3. material.

The storage tank 1 is supplied with high-pressure air, and the coating liquid is squeezed out from below by the pressure of the high-pressure air. Incidentally, instead of using high-pressure air, the coating liquid in the storage tank 1 may be squeezed out by gravity.

The storage tank 1 is connected to the supply unit 4 through a two-way valve 12. The supply unit 4 includes a syringe pump 44 driven by a motor 43 and a three-way valve 48. The storage tank 1 is connected to a first supply line 45 through a two-way valve 12, and the first supply line 45 is connected to a syringe pump 44 through a three-way valve 48. The syringe pump 44 is connected to the second supply line 49 through a three-way valve 48. The second supply line 49 is connected to the slit nozzle 3. The slit nozzle 3 can be moved in a horizontal direction relative to the holding tray 2, and a coating film is formed on the curved substrate 11 on the holding tray 2 by the coating liquid applied from the slit nozzle 3. Incidentally, the control unit controls the operation from the storage tank 1 to the slit nozzle by controlling the supply unit 4 (specifically, the operation of the injection pump 44 and the three-way valve 48 driven by the motor 43). Supply pressure and / or supply amount of the coating liquid of 3.

FIG. 2 is a schematic perspective view of the vicinity of the slit nozzle 3 portion. As shown in FIG. 2, in the slit nozzle 3, a slit serving as a discharge port of the coating liquid is a slit having a predetermined width in the nozzle moving direction (X direction) of the slit nozzle 3 and orthogonal to the X direction. The direction Y is extended. Then, the coating liquid can be applied to the curved base material 11 on the holding tray 2 by a predetermined width by moving the slit nozzle 3 in the X direction. The control unit can adjust the X-direction movement of the slit nozzle 3 speed. Specifically, the control unit controls the movement speed in the X direction of the slit nozzle 3 to be inversely proportional to the distance D from the slit front end portion 3 a of the slit nozzle 3 to the coating surface 11 a of the curved substrate 11. Slit nozzle 3.

The curved base material 11 is curved from the Y direction so as to protrude downward, and the upper coating surface 11a has a concave curved surface, and the concave curved surface has a certain curvature. The curved base material 11 has a configuration in which a concave curved surface extends in the Y direction.

In addition, the coating liquid applied to the curved substrate 11 is preferably thixotropic. Thixotropy is a property that shows an intermediate between a plastic solid like a gel and a non-Newtonian liquid like a sol, meaning a property that viscosity changes over time. Specifically, if continuously subjected to shear stress, the viscosity will gradually decrease and become liquid, and if it is stationary, the viscosity will gradually increase and finally become solid. In this embodiment, the coating liquid is thixotropic, whereby the coating liquid is liquefied by being given a shearing stress when it is discharged from the slit nozzle 3, and the viscosity gradually increases after coating on the curved substrate 11 and finally becomes solid. shape. All in all, it is usually a liquid with a high viscosity but a reduced viscosity and better fluidity when pressure is applied (more common examples are paint, tomato sauce, mayonnaise), and it is suitable for use in coatings with thick coatings as in the present invention. In the case where the coating film is thin, it may flow out. After pressure is applied and the liquid is discharged with good fluidity, the viscosity increases when adhered to the coating surface, making it difficult to flow out.

(Holding tray)

FIG. 3 is a schematic front view of the holding tray 2. As shown in FIGS. 2 and 3, the holding tray 2 that holds the curved substrate 11 has a pair of clamping members 21 and 22 and a supporting structure at one end of the slit nozzle 3 in the slit direction (Y direction). 23, 24, the former is to hold the curved substrate 11 between the two ends of the curved substrate 11 in the nozzle moving direction (X direction) of the slit nozzle 3, and the latter is arranged in a pair in the X direction The curved base material 11 is supported from below between the sandwiching members 21 and 22. The holding tray 2 has a pair of holding members 25 and 26 and supporting members 27 and 28 at the other end of the slit nozzle 3 in the slit direction (Y direction). The former is moved by the nozzle of the slit nozzle 3 Both sides of the curved base material 11 in the direction (X direction) sandwich and hold the curved base material 11 therebetween. The latter is arranged between a pair of holding members 25 and 26 in the X direction to support the curved base from below.材 11。 Material 11. The clamping member 21 and the supporting member 23 and the clamping member 25 and the supporting member 27 are provided as a pair at both ends of the curved base material 11 in the slit direction (Y direction) of the slit nozzle 3, The holding member 22 and the supporting member 24 and the holding member 26 and the supporting member 28 are provided as a pair at both ends of the curved base material 11 in the slit direction (Y direction) of the slit nozzle 3.

The holding member 21 includes a vertical portion 21a extending in the vertical direction, and a horizontal portion 21b extending from the upper end portion of the vertical portion 21a in the horizontal direction. Here, in FIG. 3, the length A of the vertical portion 21a, the length B of the slit nozzle 3 and the vertical portion 21a, and the length C of the slit nozzle 3 (initial position) and the X direction of the vertical portion 21a are constant. Therefore, when the curved substrate 11 is clamped by the clamping member 21, the length A, length B, and length C are constant even if the thickness or curvature of the curved substrate 11 is changed. Therefore, even if the curvature of the curved substrate 11 is changed It is also possible to make the initial conditions of the operation of the coating device 10 constant. Incidentally, the holding members 21, 22, 25, and 26 are formed in such a manner that the height of the lower end of the horizontal portion (that is, the length A of the vertical portion) is the same, and both ends of the curved base material 11 are at the same height To clamp.

In order to adjust the distance between the holding members 21 and 22 in accordance with the length of the curved substrate 11 in the nozzle moving direction (X direction), the holding member 22 can move in the X direction relative to the holding member 21. Specifically, the ball screw 201 engaged with the clamping member 22 is provided to extend from the X-direction end portion of the table 20 to the X-direction inner side. The handle 202 at the front end portion of the ball screw 201 can be rotated to make the The clamping member 22 engaged with the ball screw 201 moves in the X direction. In addition, since the holding member 22 and the supporting member 24 are mounted on the moving table 203 (which is mounted on the upper portion of the table 20 and is movable in the X direction), the holding member 22 is moved in the X direction by the ball screw 201 At this time, the mobile station 203 will also move in the X direction, and furthermore, the support member 24 will also move in the X direction. As a result, the holding member 22 and the supporting member 24 move integrally in the X direction.

Similar to the holding member 22, in order to adjust the distance between the holding members 25 and 26 in accordance with the length of the curved substrate 11 in the nozzle moving direction (X direction), the holding member 26 may be along the X with respect to the holding member 25. Move in the direction. The support member 28 moves in the X direction integrally with the holding member 26.

The support members 23, 24, 27, and 28 have the same structure. Hereinafter, the supporting member 23 will be described as an example. The support member 23 has a support portion 23a in contact with the curved base material 11 at an upper end portion, and the support portion 23a can be raised and lowered by compressed air, electromagnetic force, mechanical structure, or the like. The top of the support portion 23a has a spherical shape and is made of resin. Furthermore, the support member 23 has a potential energy imparting member 23 b which is imparted with potential energy in the vertical direction. The potential energy imparting member 23b is, for example, a spring, and has a buffer function when the curved base material 11 is supported. The potential energy applying member 23b is housed in the tubular member 23c, and raises and lowers the support portion 23a.

The coating apparatus 10 operates as follows.

First, high-pressure air is supplied to the storage tank 1 to pressurize it, and the two-way valve 12 is opened. Then, using the three-way valve 48 as the suction side and rotating the motor 43 toward the suction side, the coating liquid in the storage tank 1 passes through the first supply line 45 and passes through the three-way valve 48 to fill the syringe pump 44.

After the filling to the syringe pump 44 is completed, the three-way valve 48 is switched to the discharge side. Then, when the motor 43 is rotated toward the discharge side, the coating liquid in the injection pump 44 is supplied from the three-way valve 48 through the second supply line 49 to the slit nozzle 3. The control unit controls the motor 43 so that when the coating liquid in the injection pump 44 is supplied to the slit nozzle 3, the supply pressure or supply amount of the coating liquid is constant. Then, the coating liquid is discharged from the discharge port 3b of the slit nozzle 3 to the curved base material 11 on the holding tray 2 with a constant supply pressure or supply amount, and becomes a coating film.

The control unit controls the slit nozzle 3 such that when the coating liquid is discharged from the slit nozzle 3 toward the curved substrate 11, the moving speed (X direction) of the slit nozzle 3 is the same as that of the slit tip 3 from the slit tip 3 The distance from 3a to the coated surface of the curved substrate 11 is inversely proportional. FIG. 4 shows the position of the slit nozzle 3 on the curved substrate 11 and the distance from the slit front end portion 3a to the coating surface 11a, the moving speed of the slit nozzle 3, and the ejection amount or ejection pressure of the slit nozzle 3. Relationship chart. As shown in FIG. 4, the distance D from the slit front end portion 3 a of the slit nozzle 3 to the coating surface 11 a of the curved base material 11 is the shortest in the X-direction base end portion of the curved base material 11 and moves toward The X-direction central portion becomes longer, becomes longer in the X-direction central portion, becomes shorter as it moves from the X-direction central portion to the X-direction distal portion, and becomes shorter in the X-direction distal portion. And, about spraying from the slit The distance D between the tip end portion 3a of the slit 3 of the nozzle 3 and the coating surface of the curved base material 11 is the same in the X-direction base end portion and the X-direction front end portion. Therefore, the moving speed of the slit nozzle 3 is the fastest at the base end portion of the curved surface 11 in the X direction, the speed decreases as it moves toward the center portion in the X direction, and the speed decreases at the center portion in the X direction. The central portion moves toward the front end portion in the X direction and the speed increases, and the front end portion in the X direction becomes the fastest. The moving speed of the slit nozzle 3 is the same at the base end portion in the X direction and the front end portion in the X direction. Incidentally, the supply pressure or supply amount of the coating liquid is constant regardless of the position of the slit nozzle 3.

According to the coating device 10 configured as described above, the following effects can be exhibited.

(1) In a state where the supply pressure of the coating liquid to the slit nozzle 3 is constant, the moving speed of the slit nozzle 3 is set to a distance D from the slit tip 3a to the coating surface 11a of the curved substrate 11 By moving the slit nozzle 3 in an inverse manner, the coating liquid can be applied to the curved substrate 11 such that the upper surface of the coating liquid becomes flat.

(2) In a state where the supply amount of the coating liquid to the slit nozzle 3 is constant, the moving speed of the slit nozzle 3 is set to a distance D from the slit tip 3a to the coating surface 11a of the curved substrate 11 By moving the slit nozzle 3 in an inverse manner, the coating liquid can be applied to the curved substrate 11 such that the upper surface of the coating liquid becomes flat.

(3) The adhesive is applied to the concave curved surface of the curved substrate 11 by using the adhesive as a coating liquid, whereby the adhesive can be applied to the concave curved surface so that the upper surface of the adhesive liquid becomes flat. As a result, the bonding of the convex curved glass and the flat glass becomes easy, and the sheet-side convex glass can be easily formed.

(4) If the coating liquid has thixotropy, the movement of the coating liquid applied to the curved substrate 11 can be suppressed, and the coating liquid can be evenly applied to a predetermined area of the curved substrate 11. In addition, if the coating liquid has thixotropy, the viscosity of the coating liquid after ejection is high. Therefore, even if the coating thickness changes during coating as in the case of flat coating on the curved substrate 11, coating is unlikely to occur. In the case where the liquid flows out from a thick place to a thin place and the thickness is changed, the upper surface of the coating liquid may become a suitable plane.

(5) Since the concave curved surface of the curved substrate 11 has a certain curvature, it can be easily achieved that the moving speed of the slit nozzle 3 is inversely proportional to the distance from the slit front end portion 3a to the curved substrate 11 .

(6) Regarding another coating method in the case where the distance D from the front end portion 3a of the slit nozzle 3 to the coating surface 11a of the curved substrate 11 is continuously changed, it is conceivable that X of the 4th order slit nozzle 3 A method of applying a coating material in a direction with a constant moving speed so that the supply pressure or supply amount of the coating liquid is proportional to the distance D. Then, if the amount of coating per unit time is changed in this way, the time it takes for the coating liquid to volatilize to solidify may not be constant (in the case of thick coating, the volatilization takes time), so There is a problem that the quality of the coating liquid after curing of the coating surface 11 of the curved substrate 11 lacks uniformity. In contrast, in the present invention, the supply pressure or supply amount of the coating liquid is constant, so the time for curing the coating liquid to be solid is constant at any point in time, and it can have the uniformity of the quality of the cured coating liquid. The effect is higher than the case where the supply pressure or supply amount of the coating liquid is applied in proportion to the distance D.

Although in the above embodiment, the supporting member is moved at the nozzle Two moving directions (X directions) are provided, but one or three or more may be provided.

Although in the above embodiment, the holding member and the supporting member are provided with a pair of both ends of the curved base material 11 in the slit direction (Y direction) of the slit nozzle 3, the holding member and the supporting member may be Three or more are provided with a predetermined interval in the Y direction.

Although in the above embodiment, the curved base material 11 has a concave shape and the concave shape has a certain curvature, the shape of the curved base material 11 is not limited to this. For example, as shown in FIG. 5, it may be the entire surface. The curved base material having a convex shape may be a curved base material having a convex shape midway in the X direction, as shown in FIG. 6.

FIG. 5 shows the position of the slit nozzle 3 on the curved substrate 11 and the distance from the slit front end portion 3a to the coating surface 11a, the moving speed of the slit nozzle 3, and the position of the slit nozzle 3 according to other embodiments. A graph showing the relationship between discharge volume or discharge pressure. As shown in FIG. 5, the distance D from the slit front end portion 3 a of the slit nozzle 3 to the coating surface 11 a of the curved base material 11 is the longest in the X-direction base end portion of the curved base material 11. The center portion in the X direction becomes shorter, becomes shorter in the center portion in the X direction, becomes longer as it moves from the center portion in the X direction to the front portion in the X direction, and becomes longer in the front portion in the X direction. The distance D from the slit front end portion 3 a of the slit nozzle 3 to the coating surface of the curved substrate 11 is the same in the X-direction base end portion and the X-direction front end portion. Therefore, the moving speed of the slit nozzle 3 is the slowest at the base end portion of the curved surface 11 in the X direction, and the speed increases as it moves toward the center portion in the X direction, and becomes the fastest in the center portion of the X direction. The central portion moves toward the front end portion in the X direction and the speed decreases, and the front end portion in the X direction becomes the slowest. Moreover, regarding the movement of the slit nozzle 3 The speed is the same at the base end portion in the X direction and the front end portion in the X direction. Incidentally, the supply pressure or supply amount of the coating liquid is constant regardless of the position of the slit nozzle 3.

FIG. 6 shows the position of the slit nozzle 3 on the curved substrate 11 and the distance from the slit front end portion 3a to the coating surface 11a, the moving speed of the slit nozzle 3, and the position of the slit nozzle 3 according to other embodiments. A graph showing the relationship between discharge volume or discharge pressure. As shown in FIG. 6, the distance D from the slit front end portion 3 a of the slit nozzle 3 to the coating surface 11 a of the curved base material 11 varies from the X direction base end portion of the curved base material 11 to the X direction. When it is long, it becomes shorter as it moves toward the central part in the X direction on the way, and becomes longer as it moves from the central part in the X direction to the X direction, and becomes shorter as it moves toward the front end in the X direction. The distance D is the same at the base end portion in the X direction and at the front end portion in the X direction. Therefore, the moving speed of the slit nozzle 3 becomes slower as it moves from the base end portion of the curved surface 11 in the X direction toward the X direction, and becomes faster as it moves toward the center portion of the X direction on the way. The central portion in the X direction becomes slower toward the X direction, and becomes faster as it moves toward the distal end portion in the X direction. Incidentally, the supply pressure or supply amount of the coating liquid is constant regardless of the position of the slit nozzle 3.

In addition, although the drawing is omitted, the movement speed of the slit nozzle 3 is controlled in inverse proportion to the distance D from the front end portion 3a of the slit nozzle 3 to the coating surface 11a of the curved substrate 11, as long as it is controlled in advance. To understand the shape of the curved substrate 11, it is sufficient to control the slit nozzle 3 by a program that cooperates with it. In addition, if each curved substrate 11 has a different shape, a distance can be set in front of the traveling direction of the slit nozzle 3. Sensor, continuous measurement The distance D in the forward direction of the slit nozzle 3 is determined, whereby the slit nozzle 3 is moved at a moving speed that is inversely proportional to the distance D; in addition, other methods may be used.

In addition, in the above-mentioned embodiment, the mechanism for discharging the coating liquid from the supply unit 4 from the slit nozzle 3 is described as a mechanism for changing the discharge amount (supply amount) by pressure, such as the injection pump 44. It may be a mechanism such as a gear pump that changes the supply amount by the number of rotations. In the present invention, the supply pressure from the slit nozzle 3 is constant by making the operating pressure or the number of rotations constant.

Various modifications and changes are possible without departing from the spirit and scope of the invention described in the scope of the patent application.

[Industrial availability]

The present invention can provide a coating device and a coating method for making the upper surface of the coated coating liquid a flat coating liquid when the coating liquid is coated on a curved substrate, so the industrial use value is high.

Claims (5)

A coating device is a coating device for a coating solution for a curved substrate, which comprises a storage tank for storing the coating solution, a slit nozzle for coating the coating solution on the curved substrate, and a supply section for coating the coating. The liquid is supplied from the storage tank to the slit nozzle; and a control unit controls the coating device; the control unit controls the supply unit so that a supply pressure of the coating liquid supplied to the slit nozzle is constant, and further, The moving speed of the slit nozzle is controlled so as to be inversely proportional to the distance from the tip of the slit of the slit nozzle to the coating surface of the curved substrate. A coating device is a coating device for a coating solution for a curved substrate, which comprises a storage tank for storing the coating solution, a slit nozzle for coating the coating solution on the curved substrate, and a supply section for coating the coating. The liquid is supplied from the storage tank to the slit nozzle; and a control unit controls the coating device; the control unit controls the supply unit so that a supply amount of the coating liquid supplied to the slit nozzle is constant, and further, The moving speed of the slit nozzle is controlled so as to be inversely proportional to the distance from the tip of the slit of the slit nozzle to the coating surface of the curved substrate. The coating device according to claim 1 or 2, wherein the coating surface of the curved substrate has a concave curved surface. A coating method is a coating liquid coating method for a curved substrate, characterized in that the supply pressure of the coating liquid supplied to a slit nozzle is constant, and the slit nozzle is configured to apply the coating liquid to the curved substrate. The moving speed of the slit nozzle is inversely proportional to the distance from the front end of the slit of the slit nozzle to the coating surface of the curved substrate, so as to move the slit nozzle. A coating method is a coating method for a coating liquid on a curved substrate, characterized in that the supply amount of the coating liquid supplied to a slit nozzle is constant, and the slit nozzle is configured to coat the coating liquid on the curved surface. Substrate; the moving speed of the slit nozzle is inversely proportional to the distance from the front end of the slit of the slit nozzle to the coating surface of the curved substrate, so as to move the slit nozzle.