JP7427347B2 - Coating device - Google Patents

Description

The present invention enables the coating liquid stored in the coating liquid storage portion of the coating nozzle to be discharged onto the object to be coated from the slit-shaped discharge port at the tip of the coating nozzle, and also connects the coating nozzle and the object to be coated. The present invention relates to a coating device that applies a coating liquid to the surface of an object by moving it relatively. Particularly, in the coating device as described above, when the coating liquid in the coating liquid storage section is intermittently applied to the surface of the object to be coated through the slit-shaped discharge port, the object to be coated and the coating nozzle are moved relative to each other. Even when the coating speed is increased, the coating liquid can be easily applied to the surface of the object to be coated through the slit-shaped discharge port intermittently and at short intervals.

Conventionally, a coating nozzle equipped with a slit-shaped discharge port as shown in Patent Document 1 has been used, and the coating liquid contained in the coating liquid storage portion of the coating nozzle is transferred from the slit-shaped discharge port at the tip of the coating nozzle. A coating device is used that applies a coating liquid to the surface of the object by discharging it onto the object and moving the coating nozzle and the object relatively. In the apparatus, the coating liquid is intermittently discharged onto the surface of the object to be coated through the slit-shaped discharge opening to intermittently apply the coating liquid to the surface of the object to be coated.

In order to intermittently apply the coating liquid to the surface of the object to be coated through the slit-shaped discharge port, Patent Document 2 discloses that the coating liquid is supplied to a coating die using a syringe pump, and After relatively moving the sheet-shaped object to be coated and the coating nozzle, the coating liquid is supplied to the surface of the object for a predetermined length from the slit-shaped discharge port provided at the tip of the coating die. , an intermittent coating device is disclosed in which the supply of the coating liquid to the coating die by the syringe pump is stopped and such operations are repeated to intermittently apply the coating liquid to the surface of the object to be coated. ing.

Furthermore, in recent years, there has been a desire to make the intermittent portion (the section where no coating liquid is applied) as short as possible in order to reduce the waste of objects to be coated.

However, as shown in Patent Document 2, when the syringe pump repeatedly switches between supplying and stopping the coating liquid to the coating die and intermittently applies the coating liquid to the surface of the object to be coated, When the syringe pump switches between supplying and stopping the coating liquid to the coating die, it takes time to transmit the pressure within the coating liquid supply pipe, and the speed at which the object to be coated and the coating nozzle are moved relative to each other is slow. When the coating speed was increased, the coating liquid could not be applied sharply and intermittently at short intervals to the surface of the object to be coated through the slit-shaped discharge port provided at the tip of the coating nozzle.

In addition, in recent years, as shown in Patent Document 3, a slit-shaped rotating coating die is provided in the coating liquid storage part of the coating nozzle to which the coating liquid is supplied through the coating liquid supply pipe. As a shutter member that opens and closes between the discharge port and the discharge port, a rod-shaped body with a guide notch along the axial direction and a D-shaped cross section is provided on the outer periphery of the rod-shaped body, and the shutter member is rotated. and guiding the guide notch to the position of the slit-shaped discharge port, thereby communicating between the coating liquid storage portion and the slit-shaped discharge port, and directly applying pressure to the coating liquid in the coating liquid storage portion. , there has been proposed a method in which the surface of the object to be coated is neatly coated through a slit-shaped discharge port from a guide notch.

However, as shown in Patent Document 3, by rotating a shutter member, which has a D-shaped cross section by providing a guide notch along the axial direction on the outer circumference of a rod-shaped body, in one direction, the guide notch is Even in the case where the coating liquid in the coating liquid storage section is applied to the surface of the object to be coated from the guide notch through the slit-shaped discharge port by guiding the coating liquid into the position of the slit-shaped discharge port, the coating liquid is accommodated by the shutter member. Since the circumferential length that closes the space between the part and the slit-shaped discharge port is long, the time during which the coating liquid cannot be applied becomes long, and when the speed at which the object to be coated and the coating nozzle are moved relative to each other is increased, the above-mentioned As in the case of Patent Document 2, it is difficult to intermittently apply the coating liquid to the surface of the object to be coated at short intervals through the slit-shaped discharge port provided at the tip of the coating nozzle.

Japanese Unexamined Patent Publication No. 7-132267 Patent No. 4260199 Patent No. 6873586

The present invention enables the coating liquid stored in the coating liquid storage portion of the coating nozzle to be discharged onto the object to be coated from the slit-shaped discharge port at the tip of the coating nozzle, and also connects the coating nozzle and the object to be coated. It is an object of the present invention to solve the above-mentioned problems in a coating device that applies a coating liquid to the surface of an object by moving it relatively.

That is, in the present invention, in the coating apparatus as described above, when the coating liquid in the coating liquid storage section is intermittently applied to the surface of the object to be coated through the slit-shaped discharge port, the object to be coated and the coating nozzle are connected to each other. An object of the present invention is to enable a coating liquid to be easily applied intermittently and at short intervals to the surface of an object to be coated through a slit-shaped discharge port even when the relative moving speed is increased.

In order to solve the above-mentioned problems, in the coating device according to the present invention, the coating liquid stored in the coating liquid storage section of the coating nozzle is delivered to the object to be coated from the slit-shaped discharge port at the tip of the coating nozzle. In a coating device that applies a coating liquid to the surface of an object to be coated by discharging the coating liquid and relatively moving the coating nozzle and the object to be coated, a rotating member rotating within the coating liquid storage section is connected to a slit. The shutter protrusions of the plurality of shutter protrusions provided along the slit-shaped discharge opening and protruding radially outward from the rotating member are arranged so that each of the shutter protrusions closes the entire slit-shaped discharge opening. The rotary member is provided at intervals in the circumferential direction, and the entire slit-shaped discharge port is opened and closed by each of the plurality of shutter protrusions by rotating the rotating member, so that the entire slit-shaped discharge port is opened and closed by each of the plurality of shutter protrusions. The coating liquid was intermittently applied to the surface of the object to be coated through a slit-shaped discharge port.

In the coating device according to the present invention, the rotating member is rotated as described above to open and close the entire slit-shaped discharge port by each of the shutter protrusions of the plurality of shutter protrusions . Since the coating liquid in the coating liquid storage section is intermittently applied to the surface of the object to be coated through the slit-shaped discharge port, the amount of coating liquid on the object to be coated depends on the rotational speed of the rotating member and the width and spacing of the shutter protrusions. It becomes possible to easily adjust the interval at which the coating liquid is applied to the surface intermittently so as to correspond to the length of the slit-shaped discharge port.

Further, in the coating apparatus according to the present invention, a pressure adjusting means for adjusting the pressure applied to the coating liquid in the coating liquid storage section is provided, and the pressure adjusting means adjusts the pressure applied to the coating liquid inside the coating liquid storage section. Preferably, the coating liquid in the coating liquid storage section is applied to the surface of the object to be coated through the slit-shaped discharge port while maintaining a constant pressure.

In this way, when the rotating member is rotated to open and close the entire slit-shaped discharge port using each of the plurality of shutter protrusions , if the slit-shaped discharge port is opened, the application The coating liquid stored in the liquid storage section is supplied to the surface of the object to be coated through the slit-shaped discharge port at a constant pressure, and the coating liquid is applied to the surface of the object to be coated with a constant thickness as it moves relatively. On the other hand, when the entire slit-shaped discharge port is closed by the shutter protrusion, the supply of the coating liquid to the surface of the object to be coated through the slit-shaped discharge port is quickly and sharply stopped.

Further, in the coating device according to the present invention, the pressure adjusting means supplies gas into the coating liquid storage portion to which the coating liquid is supplied, so that the pressure applied to the coating liquid in the coating liquid storage portion is maintained at a constant pressure. It can be adjusted to become.

In the coating device of the present invention, the coating liquid stored in the coating liquid storage section is supplied to the object to be coated from the slit-shaped discharge port at the tip of the coating nozzle, and the coating liquid is applied to the surface of the object to be coated. , a rotary member that rotates within the coating liquid storage section is provided along the slit-shaped discharge port, and each of the shutter protrusions of the plurality of shutter protrusions protrudes radially outward from the rotary member. The slit-shaped discharge ports are provided at intervals in the circumferential direction of the rotating member so as to close the entire slit-shaped discharge ports , and the rotating member is rotated so that each of the shutter ridges of the plurality of shutter ridges closes the slit-shaped discharge ports. The whole body is opened and closed, and the coating liquid in the coating liquid storage section is intermittently applied to the surface of the object to be coated through the slit-shaped discharge port.

As a result, in the coating device of the present invention, the rotational speed at which the rotating member is rotated, and the slit-like discharge of each shutter protrusion in the plurality of shutter protrusions provided so as to protrude radially outward from the rotating member. The interval at which the coating liquid is applied intermittently to the surface of the object to be coated in a manner that corresponds to the length of the slit-shaped discharge port, depending on the width of the part facing the outlet, the spacing between each shutter protrusion, etc. Even when the relative movement speed between the object to be coated and the coating nozzle is increased, the coating liquid can be intermittently applied to the surface of the object to be coated through the slit-shaped discharge port. can be easily applied at short intervals.

In the coating device according to the embodiment of the present invention, the rotating member rotating within the coating liquid storage unit is stopped, and the coating liquid in the coating liquid storage unit is discharged by one shutter protrusion protruding radially outward from the rotating member. (A) is a schematic cross-sectional explanatory view showing a state in which the slit-shaped discharge port is closed, and (B) is a schematic cross-sectional view showing a state in which the coating liquid is supplied into the coating liquid storage section while exhausting the air in the coating liquid storage section; (B) is a schematic cross-sectional explanation showing a state in which the pressure applied to the coating liquid in the coating liquid storage section is adjusted by supplying air into the coating liquid storage section with an appropriate amount of coating liquid supplied into the coating liquid storage section. It is a diagram. In the coating apparatus according to the embodiment described above, (A) to (C) are performed by rotating the rotating member while adjusting the pressure applied to the coating liquid in the coating liquid storage part to a constant value. FIG. 2 is a schematic cross-sectional explanatory diagram showing a state in which a coating liquid is intermittently applied to the surface of an object to be coated through a slit-shaped discharge port. In the coating device according to another embodiment of the present invention, (A) to (C) apply pressure applied to the coating liquid filled in the coating liquid storage part with the coating liquid filled in the coating liquid storage part. A schematic diagram showing a state in which the coating liquid is supplied while being adjusted at a constant rate, the rotating member is rotated, and the coating liquid in the coating liquid storage section is intermittently applied to the surface of the object to be coated through the slit-shaped discharge port. It is a cross-sectional explanatory view.

Hereinafter, a coating device according to an embodiment of the present invention will be specifically described based on the accompanying drawings. Note that the coating device in the present invention is not limited to that shown in the embodiments below, and can be implemented with appropriate modifications within the scope of the gist of the invention.

In the coating apparatus of the embodiment shown in FIGS. 1(A), (B) and FIGS. 2(A) to 2(C), a coating liquid storage section 11 for storing coating liquid P is provided inside the coating nozzle 10, and , a slit-shaped discharge port 12 is provided at the tip end of the coating liquid container 11 for discharging the coating liquid P contained in the coating liquid storage section 11 .

In the coating device of this embodiment, a rotary member 13 that rotates within the coating liquid storage section 11 is provided along the slit-shaped discharge port 12, and a rotary member 13 that protrudes radially outward from the rotary member 13 is provided. A plurality of shutter protrusions 13a (six in the example shown in the figure) are provided at required intervals in the circumferential direction of the rotating member 13 to close the slit-shaped discharge port 12 in this manner. Note that the number of shutter protrusions 13a provided on the rotating member 13 is not particularly limited as long as it is plural, and the width of the portion of the shutter protrusions 13a that closes the slit-shaped discharge port 12 is equal to the width of the slit-shaped discharge port 12. The width is not particularly limited as long as it is larger than the width of the discharge port 12, and is appropriately determined depending on the rotational speed of the rotating member 13 and the conditions for intermittently applying the coating liquid P to the surface of the object W to be coated. be able to.

Here, in the coating apparatus of the embodiment, as shown _in FIG. With the valve 15a in the air supply pipe 15 of the pressure regulating means for adjusting the pressure applied to the coating liquid P in the liquid storage part 11 kept constant, the valve 16a in the exhaust pipe 16 is opened, and the coating liquid storage part The air (gas) Air in 11 is exhausted to the outside. Further, the pressure adjustment of the pressure adjustment means may be determined by the opening degree of the valve 15a, but a pressure reducing valve (not shown) or the like may be provided upstream thereof. In the drawings, the valves 15a and 16a are shown in white when they are open, and in black when they are closed.

When an appropriate amount of the coating liquid P is supplied into the coating liquid storage section 11 as described above, as shown in FIG. 1(B), while closing the valve 16a in the exhaust pipe 16, the air supply The valve 15a in the pipe 15 is opened, and air (gas) is supplied into the coating liquid storage section 11 by applying a pressure _P2 higher than the pressure _P1 of the coating liquid P through the coating liquid supply pipe 14. , the pressure applied to the coating liquid P supplied into the coating liquid storage section 11 is maintained at a constant pressure.

In the coating apparatus according to this embodiment, in order to intermittently apply the coating liquid P to the surface of the object W to be coated, the coating liquid P is supplied to the coating liquid storage section 11 under pressure through the coating liquid supply pipe 14 as described above. At the same time, air is supplied into the coating liquid storage part ₁₁ through the air supply pipe 15 by applying a pressure _P2 higher than the above pressure _P1 to the coating liquid storage part 11. The pressure applied to the supplied coating liquid P is maintained at a constant pressure, and as shown in FIGS. At the same time, the rotating member 13 provided in the coating liquid storage section 11 is rotated.

Here, the rotating member 13 is rotated as described above, and as shown in FIG. Then, the coating liquid P in the coating liquid storage part 11 is supplied to the surface of the object W to be coated through the slit-shaped discharge port 12 at a constant pressure, and the coating liquid P is applied to the surface of the object W to be coated with a constant thickness. Becomes coated. Then, when the rotating member 13 is further rotated and the shutter protrusion 13a on the rotating member 13 is guided to the position of the slit-shaped outlet 12, as shown in FIG. It is blocked by the strip 13a, and the coating liquid P is no longer applied to the surface of the object W to be coated. After that, when the rotating member 13 is further rotated and the shutter protrusion 13a on the rotating member 13 is separated from the slit-shaped discharge port 12, as shown in FIG. 2(C), the slit-shaped discharge port 12 is opened. The coating liquid P in the coating liquid storage part 11 is again supplied to the surface of the object W to be coated through the slit-shaped discharge port 12 at a constant pressure, and the coating liquid P is applied to the surface of the object W to be coated with a constant thickness. Become so.

Then, when the rotating member 13 provided in the coating liquid storage section 11 is rotated in one direction while moving the object W to be coated in the direction perpendicular to the slit-shaped discharge port 12 as described above, These operations are repeated, and the coating liquid P is intermittently applied to the surface of the object W to be coated to a constant thickness.

Here, in the coating device of this embodiment, the rotational speed at which the rotating member 13 is rotated, the number and spacing of the shutter protrusions 13a provided so as to protrude radially outward from the rotating member 13, and the slit shape. By changing the width of the shutter protrusion 13a that closes the discharge port 12, it becomes possible to easily adjust the interval at which the coating liquid P is intermittently applied to the surface of the object W, and Even when the speed at which W and the coating nozzle 10 are relatively moved is increased, the coating liquid P in the coating liquid storage section 11 is intermittently applied to the surface of the object W to be coated through the slit-shaped discharge port 12 at short intervals. This makes it easy to apply.

For example, if the width (circumferential length) of the shutter protrusion 13a that closes the slit-shaped discharge port 12 is small, even if the relative moving speed of the object W to be coated is fast, the intermittent portion (the section where the coating liquid P is not applied) can be shortened. can.

In addition, in the coating apparatus of this embodiment, when the coating liquid P is intermittently applied to the surface of the object W to be coated through the slit-shaped discharge port 12, the object W to be coated is moved. 10 can also be moved along the object W to be coated.

Note that the coating device of the present invention is not limited to that shown in the above embodiment.

Here, in the coating apparatus of the embodiment shown in FIGS. 3(A) to 3(C), similarly to the above-described embodiment, the coating liquid storage section 11 accommodates the coating liquid P inside the coating nozzle 10. In addition, a slit-shaped discharge port 12 for discharging the coating liquid P stored in the coating liquid storage section 11 is provided at the tip, and a rotating member 13 rotating within the coating liquid storage section 11 is provided at the tip thereof. A shutter protrusion 13a is provided along the slit-shaped discharge port 12 and protrudes radially outward from the rotating member 13 to close the slit-shaped discharge port 12 at a required interval in the circumferential direction of the rotating member 13. Multiple locations are provided via the .

On the other hand, in the coating apparatus of this embodiment, the coating liquid P is supplied from the coating liquid supply pipe 14 into the coating liquid storage portion 11 of the coating nozzle 10 under pressure using a syringe pump (not shown) or the like. Then, the coating liquid P is filled into the coating liquid storage part 11 so that the pressure of the coating liquid P in the coating liquid storage part 11 is kept constant.

In the coating apparatus of this embodiment, the coating liquid P is supplied through the coating liquid supply pipe 14 so that the pressure of the coating liquid P in the coating liquid storage section 11 becomes constant as described above, and as shown in FIG. As shown in (A) to (C), the object W to be coated is moved with respect to the coating nozzle 10 in a direction perpendicular to the slit-shaped discharge port 12, and the The rotating member 13 is rotated.

Here, as shown in FIG. 3(A), when the shutter protrusion 13a of the rotating member 13 is guided to the position of the slit-shaped discharge outlet 12, the slit-shaped discharge outlet 12 is closed by the shutter protrusion 13a, and the coating is applied. The coating liquid P in the liquid storage part 11 is no longer applied to the surface of the object W to be coated, and from this state, the rotating member 13 is rotated, and as shown in FIG. 3(B), the shutter protrusion on the rotating member 13 is 13a is separated from the slit-shaped discharge port 12 and the slit-shaped discharge port 12 is opened, the coating liquid P in the coating liquid storage section 11 is supplied to the surface of the object W to be coated through the slit-shaped discharge port 12 at a constant pressure. As a result, the coating liquid P is applied to the surface of the object W to be coated with a constant thickness, and then the rotating member 13 is further rotated, as shown in FIG. 3(C). When the shutter protrusion 13a is guided to the position of the slit-shaped discharge port 12, the slit-shaped discharge port 12 is closed by the shutter protrusion 13a, and the coating liquid P in the coating liquid storage portion 11 is directed to the surface of the object W to be coated. It will no longer be coated.

Then, when the rotating member 13 provided in the coating liquid storage section 11 is rotated in one direction while moving the object W to be coated in the direction perpendicular to the slit-shaped discharge port 12 as described above, The above operations are repeated, and the coating liquid P is intermittently applied to the surface of the object W to be coated to a constant thickness, similarly to the above-described embodiment.

Also, in the coating device of this embodiment, similarly to the coating device of the previous embodiment, the coating nozzle 10 can be moved along the object W to be coated, and the rotation member 13 can be rotated. By changing the speed, the number and interval of the shutter protrusions 13a provided so as to protrude radially outward from the rotating member 13, and the width of the shutter protrusions 13a that close the slit-shaped discharge port 12, it is possible to It is now possible to easily adjust the interval at which the coating liquid P is intermittently applied to the surface of W, and even when the relative movement speed between the object W and the coating nozzle 10 is increased, the coating can be easily maintained. The coating liquid P in the liquid storage portion 11 can be easily applied to the surface of the object W to be coated intermittently at short intervals through the slit-shaped discharge port 12.

In addition, in the coating apparatus in the embodiment described above, when coating the coating liquid P on the surface of the object W to be coated, the coating liquid P is supplied to the coating liquid storage portion 11 through the coating liquid supply pipe 14 at a pressure P ₁ as described above. At the same time, the air is supplied into the coating liquid storage section 11 through the air supply pipe 15 by applying a pressure _P2 higher than the above pressure _P1 . (not shown), and with this valve open, the coating liquid P is supplied into the coating liquid storage section 11, and then, with this valve closed, air is supplied through the air supply pipe 15 to the coating liquid storage section 11. Alternatively, the above pressure _P2 may be applied by supplying it into the section 11. This prevents the coating liquid P from flowing back into the coating liquid supply pipe 14 while the coating liquid P is being applied to the surface of the object W to be coated.

10: Coating nozzle 11: Coating liquid storage section 12: Slit-shaped discharge port 13: Rotating member 13a: Shutter protrusion 14: Coating liquid supply pipe 15: Air supply pipe 15a: Valve 16: Exhaust pipe 16a: Valve Air: Air P: Coating liquid W: Object to be coated

Claims (3)

Discharging the coating liquid stored in the coating liquid storage portion of the coating nozzle onto the object from a slit-shaped discharge port at the tip of the application nozzle, and moving the coating nozzle and the object relatively. In a coating device for applying a coating liquid to the surface of an object to be coated, a rotating member rotating within the coating liquid storage portion is provided along the slit-shaped discharge port, and a rotating member that protrudes radially outward from the rotating member. All of the shutter protrusions of the plurality of shutter protrusions are provided at intervals in the circumferential direction of the rotary member so as to close the entire slit-shaped discharge port , and the rotary member is rotated. The entire slit-shaped discharge port is opened and closed by each of the shutter ridges of the plurality of shutter ridges , and the coating liquid in the coating liquid storage section is intermittently applied to the surface of the object to be coated through the slit-shaped discharge port. A coating device characterized by coating. 2. The coating apparatus according to claim 1, further comprising a pressure adjusting means for adjusting the pressure applied to the coating liquid in the coating liquid storage section, wherein the pressure adjusting means keeps the pressure applied to the coating liquid inside the coating liquid storage section constant. A coating device characterized in that the coating liquid in the coating liquid storage portion is applied onto the surface of the object to be coated through the slit-shaped discharge port while the pressure is maintained. In the coating device according to claim 2, the pressure adjusting means supplies gas into the coating liquid storage section to adjust the pressure applied to the coating liquid within the coating liquid storage section to a constant pressure. A coating device featuring:

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