JP7275420B2 - Closing member, coating device, and coating preparation method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a closing member, a coating device, and a coating preparation method.

Conventionally, when coating a web running on a backup roll from a die, the die is arranged near the backup roll, and the coating liquid is pressure-fed into the liquid reservoir inside the die from a pump. A coating liquid is applied to the web through the discharge port of the die.

Japanese Patent No. 5593967

However, when the coating liquid is applied to the web from the die as described above, air (bubbles) is mixed in the coating liquid at the start of coating, and air bubbles may be mixed in the coated portion formed on the web. . Therefore, in preparation work before coating, the discharge port of the die is closed with an adhesive tape, etc., and the coating liquid is discharged from the air hole provided in the die while supplying the coating liquid to the die, so that air bubbles are not mixed. The coating liquid is circulated to

However, in this preparatory work, it is troublesome to apply the adhesive tape to the discharge port of the die without wrinkles and without leakage of the coating liquid. , there was a problem that the coating liquid leaked from the adhesive tape.

SUMMARY OF THE INVENTION Accordingly, it is an object of the present invention to provide a closing member, a coating apparatus, and a coating preparation method that can simply and completely close the discharge port of a die in view of the above problems.

Embodiment 1 of the present invention comprises: a first main body; a second main body combined with the first main body; a reservoir for a coating liquid provided in the first main body; and the second main body, a slit-like coating liquid discharge port at the tip of the liquid passage, and the liquid reservoir provided in the first main body. A closing member for closing the discharge port at the tip of the die, the closing member having a supply port for supplying the coating liquid to the part and a discharge port provided in the second body, the closing member closing the discharge port. and an attachment member for attaching the closure plate to the die, wherein the attachment member includes a first support portion that supports the closure plate and the die located on the side opposite to the discharge port and a connecting portion connecting the first supporting portion and the second supporting portion .

Further, in a second embodiment of the present invention, the die described in the first embodiment, the closing member described in the first embodiment, and the closing member provided in the vicinity of the discharge port of the die are arranged to move the web while rotating. A coating comprising a running backup roll, an on-off valve connected to the discharge port, a tank for the coating liquid, and a pump for supplying the coating liquid in the tank to the supply port of the die. It is a device.

The closing member according to Embodiment 1 is attached to the discharge port of the die by the mounting member, the discharge port is blocked by the blocking plate, the discharge port is opened, and the coating is applied from the supply port. The coating preparation method includes supplying a liquid, discharging the coating liquid from the discharge port, and continuing to supply the coating liquid until bubbles disappear from the liquid reservoir and the liquid passage.

The closing member according to Embodiment 1 is attached to the discharge port of the die by the mounting member, the discharge port is blocked by the blocking plate, the discharge port is opened, and the coating is applied from the supply port. In the coating preparation method, a liquid is supplied, the coating liquid is discharged from the discharge port, and the coating liquid in the liquid reservoir and the liquid passage is circulated.

According to the present invention, the ejection port can be completely closed by attaching the mounting member to the die and closing the ejection port of the die with the closure plate.

1 is a side view of a coating device showing an embodiment of the present invention; FIG. FIG. 3 is a perspective view of a die with a closure member attached; FIG. 10 is a side view of a die with a closure member attached; FIG. 4 is a vertical cross-sectional view of a die with a closing member attached; FIG. 4 is a front view of the die with the closure member attached; FIG. 4 is a rear view of the die with the closure member attached; FIG. 4B is a bottom view of the die with the closure member attached;

A coating device 10 according to an embodiment of the present invention and a closing member 50 used in the coating device 10 will be described below with reference to FIGS. 1 to 7. FIG.

(1) Coating device 10
The configuration of the coating device 10 will be described with reference to FIGS. 1, 3, 4 and 7. FIG. The coating device 10 coats a web W such as a long film, fabric, metal foil, paper, or the like with a coating liquid.

The coating apparatus 10, as shown in FIG. The coating liquid is applied from the die 12 to the web W which is formed. In this case, the coating liquid is stored in a tank 16, and a constant amount of the coating liquid per unit time is supplied from the tank 16 to the die 12 by a pump 18, which is a metering pump.

As shown in FIGS. 3 and 4, the die 12 has a lower die 20 which is a first body, and an upper die 22 and a shim 40 arranged above the lower die 20 . As shown in FIGS. 4 and 7 , the lower die 20 is provided with a liquid reservoir 24 in the lateral direction (the width direction of the web W), and the upper surface thereof is closed by the upper die 22 . The lower die 20 is tapered toward the front and forms a triangle. The upper die 22 is also tapered toward the front to form a triangle. When the upper die 22 is attached to the lower die 20 , a liquid passage 26 is formed extending from the liquid reservoir 24 toward the front end of the die 12 . The front end of the liquid passage 26 is open to form a discharge port 28 . The discharge port 28 is the triangular tip of the lower die 20 and the upper die 22, and constitutes a cutting edge for applying the coating liquid. A shim 40 is sandwiched between the lower die 20 and the upper die 22 and positioned at both left and right sides and at the rear of the liquid reservoir 24 .

A supply port 30 for supplying the coating liquid is opened at the center of the bottom surface of the liquid reservoir 24 in the horizontal direction. A pair of left and right discharge ports 32 , 32 are opened in the upper die 22 at positions corresponding to the vicinity of both left and right sides of the liquid reservoir 24 . A supply pipe 34 from the pump 18 is connected to the supply port 30 . Discharge pipes 36 , 36 are connected to the pair of left and right discharge ports 32 , 32 , respectively, so that the coating liquid is circulated to the tank 16 . In addition, on-off valves 38, 38 are provided in the middle of the left and right discharge pipes 36, 36, respectively.

(2) Closing member 50
Next, the closing member 50 for closing the slit-shaped discharge port 28 of the die 12 will be described with reference to FIGS. 2 to 7. FIG. The closure member 50 has a closure plate 52 and a mounting member 66 .

As shown in FIGS. 2 and 5, the blocking plate 52 has a rectangular shape extending in the horizontal direction so as to correspond to the discharge port 28 . As shown in FIGS. 3 to 5, a rectangular sealing member 54 is provided on the rear surface of the blocking plate 52 at a position corresponding to the discharge port 28 . The sealing member 54 is an elastic member such as silicon packing or rubber, and can seal the discharge port 28 .

The attachment member 66 will be described. As shown in FIGS. 2 to 5, three rod-shaped first support portions 56 are fixed to the front surface of the blocking plate 52 in the vertical direction at predetermined intervals. The fixing positions of the three first support portions 56 are preferably the left and right side portions and the central portion of the closing plate 52 .

As shown in FIGS. 2 to 4, rod-shaped connecting portions 58 extend horizontally rearward from the upper ends of the three first support portions 56, respectively. The length of the connecting portion 58 in the front-rear direction is larger than the length of the die 12 in the front-rear direction.

As shown in FIGS. 2 to 6, the rear ends of the three connecting portions 58 are integrally connected by a horizontal connecting portion 60. As shown in FIG. Further, as shown in FIGS. 3, 4 and 6, a rod-shaped second support portion 62 is provided downward from the rear end portion of the connecting portion 58 . The second support portion 62 is positioned behind the back surface of the die 12 .

As shown in FIGS. 3, 4, and 6, a pressure bolt 64 is screwed into the lower portion of the second support portion 62 so as to penetrate therethrough in the front-rear direction.

As described above, the mounting member 66 is composed of three first support portions 56 , three connection portions 58 , one horizontal connection portion 60 , and three second support portions 62 .

(3) Preparation Method for Coating by Coating Device 10 Next, a preparation method before coating the coating liquid on the web W by the coating device 10 will be described. The reason for the preparation is that the liquid reservoir 24 and the liquid passage 26 of the die 12 contain air, which needs to be removed.

First, the backup roll 14 is placed slightly away from the die 12 .

Next, the closing member 50 is attached from above the die 12 . In this case, the sealing member 54 of the closing plate 52 is arranged in front of the discharge port 28 of the die 12 , and the die 12 is moved back and forth by the first supporting portion 56 , the connecting portion 58 and the second supporting portion 62 of the mounting member 66 . Try to sandwich from the direction. In this case, the pressing bolt 64 is loosened.

Next, the pressing bolts 64 on the three second support portions 62 are screwed in, and the tips of the three pressing bolts 64 press the back surface of the die 12 . As a result, the die 12 is sandwiched, and the sealing member 54 of the closing plate 52 completely seals the discharge port 28 .

Next, the left and right on-off valves 38 are opened.

Next, the pump 18 supplies the coating liquid to the liquid reservoir 24 . Then, the supplied coating liquid passes through the liquid reservoir 24 and the discharge port 32, and is circulated from the discharge pipe 36 to the tank 16. - 特許庁

Next, the coating liquid is circulated for 10 minutes, for example. As a result, air (bubbles) is discharged by the coating liquid, and air does not enter the liquid reservoir 24 and the interior of the liquid passage 26 . At this time, since the discharge port 28 is completely sealed by the sealing member 54 of the closing plate 52, the coating liquid does not leak from the discharge port 28 even if the liquid pressure increases.

Then the pump 18 is stopped. Also, the left and right on-off valves 38, 38 are closed.

Finally, the three pressing bolts 64 are loosened and the closure member 50 is removed from the die 12 .

In the above description, the preparation method before coating is described. The valve 38 may be opened to circulate the coating liquid. By circulating the coating liquid in this manner, the coating liquid does not solidify inside the die 12 .

(4) Coating State of Coating Device 10 Next, a method of coating the web W with the coating liquid by the coating device 10 will be described.

First, the web W is laid over the left peripheral surface of the backup roll 14 .

Next, the die 12 is arranged in the vicinity of the web W of the backup roll 14, and the gap between the web W and the ejection port 28 of the die 12 is set to the coating thickness.

Next, the pump 18 periodically supplies the amount corresponding to the coating thickness, and the backup roll 14 conveys the web W from the bottom to the top.

As a result, the coating liquid in the tank 16 is supplied to the liquid reservoir 24 of the die 12 by the pump 18 and applied to the surface of the web W from the discharge port 28 through the liquid passage 26 to a predetermined thickness.

As a result, the surface of the web W can be coated with a coating liquid that is free of air, that is, free of air bubbles.

(5) Effect According to this embodiment, the closing member 50 can be easily attached to the discharge port 28 of the die 12 .

Since the sealing member 54 of the closing plate 52 is pressed by the three pressing bolts 64, the coating liquid does not leak from the discharge port 28 even if the liquid pressure of the coating liquid increases.

(6) Modification In the above embodiment, the die 12 arranged in the horizontal direction has been described.

In the above-described embodiment, the pair of outlets 32 were provided on the left and right sides, but one or three or more outlets may be provided.

In the above embodiment, the coating liquid containing air bubbles is circulated in the tank 16, but a special collection container may be provided.

In the preparation method described above, the left and right on-off valves 38 are opened at the same time. If you do, the air on the left side will be released first, then the air on the right side will also be released, and the air will be completely released.

In the above configuration, the attachment member 66 for attaching the closing member 50 to the die 12 is composed of the rod-like first support portion 56, the connection portion 58, the horizontal connection portion 60, and the second support portion 62. Other structures may be used as long as they can fix the plate 52 .

In addition, in the above-described embodiment, the first support portions 56 are provided on both the left and right sides and the central portion of the blocking plate 52, but may be provided at two or four or more locations on the left and right sides.

While one embodiment of the invention has been described above, this embodiment is provided by way of example and is not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, replacements, and modifications can be made without departing from the spirit of the invention. These embodiments and modifications thereof are included in the scope and gist of the invention, and are included in the scope of the invention described in the claims and equivalents thereof.

DESCRIPTION OF SYMBOLS 10... Coating apparatus, 12... Die, 14... Backup roll, 16... Tank, 18... Pump, 20... Lower die, 22... Upper die, 24... Liquid reservoir 26 Liquid passage 28 Discharge port 30 Supply port, discharge port 32, 38 On-off valve 50 Closing member 52 Closing plate 54 Seal member 56 First support portion 58 Connection portion 60 Horizontal connection portion 62 Second support portion 64 Pressure bolt , 66... Mounting member

Claims (9)

a first body;
a second body combined with the first body;
a coating liquid reservoir provided in the first main body;
a liquid passage for the coating liquid formed between the liquid reservoir and the first body and the second body;
a slit-shaped discharge port for the coating liquid at the tip of the liquid passage;
a supply port provided in the first main body for supplying the coating liquid to the liquid reservoir;
an outlet provided in the second body; and
A closing member for closing the discharge port at the tip of the die having
a blocking plate that blocks the discharge port;
an attachment member that attaches the closure plate to the die;
has
The mounting member is
a first support that supports the closure plate;
a second support arranged on the back surface of the die located on the side opposite to the ejection port;
a connection portion that connects the first support portion and the second support portion;
A closure member having a The second support portion has a pressing portion that presses the closure plate toward the die,
2. The closure member of claim 1 . The pressing portion is a pressing bolt that is screwed to the second support portion, and the tip of the pressing bolt is in contact with the back surface of the die.
3. A closure member according to claim 2 . The first support portion is rod-shaped and fixed to the closure plate at predetermined intervals,
The second support portion is rod-shaped and arranged at predetermined intervals,
The connecting part is rod-shaped, and the first supporting part is fixed to one end and the second supporting part is fixed to the other end,
A closure member according to claim 3 . A seal member is provided on a surface of the closure plate that contacts the discharge port,
A closure member according to claim 1 . The die of claim 1;
The closure member of claim 1;
a backup roll provided near the discharge port of the die for running the web while rotating;
an on-off valve connected to the outlet;
a tank for the coating liquid;
a pump that supplies the coating liquid in the tank to the supply port of the die;
A coating device having A discharge pipe is connected to the on-off valve,
The discharge pipe is connected to the tank or the collection container,
The coating device according to claim 6 . attaching the closure member of claim 1 to the outlet of the die by the attachment member;
closing the discharge port with the closing plate;
Open the discharge port,
supplying the coating liquid from the supply port and discharging the coating liquid from the discharge port;
continuing to supply the coating liquid until bubbles disappear from the liquid reservoir and the liquid passage;
Coating preparation method. attaching the closure member of claim 1 to the outlet of the die by the attachment member;
closing the discharge port with the closing plate;
Open the discharge port,
supplying the coating liquid from the supply port and discharging the coating liquid from the discharge port;
circulating the coating liquid in the liquid reservoir and the liquid passage;
Coating preparation method.

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