JP7527092B2 - Intermittent coating method and intermittent coating device - Google Patents

Description

Embodiments of the present invention relate to an intermittent coating method and an intermittent coating device.

Conventionally, there is known an intermittent coating device that intermittently discharges coating fluid from a die outlet onto the first surface of a substrate being transported, forming multiple coated areas at intervals on the first surface of the substrate (e.g., Patent Document 1). One intermittent coating device of this type is known to suck in coating fluid after it is discharged from the die in order to remove the coating fluid from the die outlet in order to improve the film thickness shape at the rear end of the coated area (e.g., Patent Document 2).

JP 2015-100786 A JP 2009-95752 A

However, in conventional technology, when the coating liquid is easily stretched into long threads, i.e., when the coating liquid has high spinnability, even if the coating liquid is sucked after being discharged from the die, the coating liquid may stretch between the die and the rear end of the coating section, and the coating liquid continuing from the rear end of the coating section may adhere to the first surface of the substrate, resulting in so-called coating liquid drag.

The problem that the present invention aims to solve is to provide an intermittent coating method and intermittent coating device that can suppress dragging of coating fluid from the rear end of the coating section, even for coating fluid with high stringiness.

The intermittent coating method of the embodiment is an intermittent coating method executed by an intermittent coating device including: a backup roll around which a substrate is wound in a state of contact with the second surface of a substrate having a first surface and a second surface opposite to the first surface and being transported in a longitudinal direction; a supply mechanism for intermittently supplying a coating liquid; a die having a discharge port connected to the supply mechanism via a flow path and discharging the coating liquid supplied from the supply mechanism from the discharge port onto the first surface at a coating position where the first surface of the portion of the substrate wound around the backup roll faces the discharge port; and a moving mechanism for moving the die, the coating liquid being discharged in a horizontal direction toward the central axis of the back-up roll, thereby forming a coated portion on the first surface of the base material which is wound around the back-up roll and transported from below the central axis to above at the coating position along the circumferential direction of the back-up roll ; sucking the coating liquid in the flow path while the coated portion is being formed; and after the discharge of the coating liquid is stopped and the formation of the coated portion is completed by sucking the coating liquid , when a predetermined time has elapsed that is equal to or greater than the time required for the rear end of the coated portion to move to a position where it does not come into contact with the die which moves above the coating position, the moving mechanism moves the die to a position above the rear end of the coated portion .

FIG. 1 is a configuration diagram of an intermittent coating device according to an embodiment. FIG. 2 is a cross-sectional view of an embodiment of a die. FIG. 3 is a diagram showing a coating operation of the intermittent coating device according to the embodiment. FIG. 4 is a timing chart of the operation of the intermittent coating device according to the embodiment. FIG. 5 is a diagram showing the rising operation of the die according to the embodiment. FIG. 6 is a diagram showing an image of a coated portion formed on a film by the intermittent coating method according to the embodiment. FIG. 7 is a diagram for explaining the intermittent coating method of the first comparative example. FIG. 8 is a diagram showing an image of a coated portion formed on a film by the intermittent coating method of the first comparative example. FIG. 9 is a diagram for explaining the intermittent coating method of the second comparative example. FIG. 10 is a diagram showing an image of a coated portion formed on a film by the intermittent coating method of the second comparative example. FIG. 11 is a diagram for explaining the intermittent coating method of the third comparative example. FIG. 12 is a diagram showing an image of a coated portion formed on a film by the intermittent coating method of the third comparative example.

The following describes exemplary embodiments of the present invention. The configuration of the embodiment described below, and the actions and effects brought about by said configuration, are merely examples. Note that in this specification, ordinal numbers are used only to distinguish between parts and components, and do not indicate order or priority.

<Embodiment>
FIG. 1 is a configuration diagram of an intermittent coating device 1. The intermittent coating device 1 forms a plurality of coated portions 102 of a substantially constant thickness on a film 100 by, for example, intermittently coating a coating liquid 101 on a film 100 being transported. The film 100 is formed in a long shape having a substantially constant width. The film 100 has a first surface 100a on which the coated portions 102 are formed and a second surface 100b opposite to the first surface 100a. The film 100 is made of, for example, a synthetic resin material, but is not limited thereto. The film 100 may also be referred to as a web, the first surface 100a may also be referred to as a front surface, and the second surface 100b may also be referred to as a back surface. The film 100 is an example of a substrate.

The intermittent coating device 1 includes a backup roll 10, a supply mechanism 20, a die 30, a suction mechanism 40, a horizontal movement mechanism 50, a vertical movement mechanism 60, and a control device 70.

The backup roll 10 has a cylindrical shape and is rotatable around the central axis C1. In detail, the backup roll 10 rotates in one direction (clockwise in FIG. 1) around the central axis C1. The film 100 is wound around the backup roll 10 with the second surface 100b of the film 100 in contact with the outer circumferential surface 10a of the backup roll 10. The film 100 is wound around the backup roll 10 so that at least a part of the portion of the film 100 wound around the backup roll 10 faces from the lower vertical direction to the upper vertical direction D1. The backup roll 10 may be a driven roll rotated by a motor (not shown), or may be a driven roll rotated with the movement of the film 100.

The supply mechanism 20 intermittently supplies the coating liquid 101 to the die 30. In detail, the supply mechanism 20 has a tank 21, a pump 22, and a shutoff valve 23.

The tank 21 stores the coating liquid 101. The outlet of the tank 21 is connected to the die 30 via the supply path 24. The pump 22 is provided in the supply path 24. The pump 22 is driven by a motor (not shown) to supply the coating liquid 101 in the tank 21 to the die 30 via the supply path 24. The shut valve 23 is provided in the supply path 24 between the pump 22 and the die 30. The shut valve 23 is driven by a motor 25, which is a drive source, to open and close the supply path 24. The motor 25 is, for example, a servo motor.

The supply mechanism 20 is also provided with a return section 26. The return section 26 is provided with a return flow path 26a, a relief valve 27, and a pressure adjustment valve 28. The return flow path 26a connects the supply path 24 between the pump 22 and the shutoff valve 23 to the inlet of the tank 21. The relief valve 27 is provided in the return flow path 26a. The relief valve 27 is driven by a motor 29, which is a drive source, to open and close the return flow path 26a. The motor 29 is, for example, a servo motor. The pressure adjustment valve 28 is provided in the return flow path 26a between the relief valve 27 and the supply mechanism 20.

In the supply mechanism 20, the pump 22 is always driven during the coating operation. When the shut valve 23 is opened and the relief valve 27 is closed, the coating liquid 101 discharged from the pump 22 is supplied to the die 30 and discharged from the die 30. This forms a coated portion 102 on the first surface 100a of the film 100. On the other hand, when the shut valve 23 is closed and the relief valve 27 is opened, the coating liquid 101 discharged from the pump 22 is returned to the tank 21 via the return flow path 26a. In this case, the coating liquid 101 is not discharged from the die 30, so the coated portion 102 is not formed. The portion on the first surface 100a of the film 100 where the coated portion 102 is not formed constitutes a non-coated portion 103, and the coated portion 102 and the non-coated portion 103 form a coating pattern.

The suction mechanism 40 is connected to the supply path 24 between the shut valve 23 and the die 30, and sucks the coating liquid 101 in the supply path 24. In detail, the suction mechanism 40 has a cylinder member 41 and a piston 42 slidably inserted into the cylinder member 41. The piston 42 is driven to reciprocate vertically between an upper position and a lower position by a motor 43 connected via a ball screw (not shown). The motor 43 is, for example, a servo motor. A cylinder chamber 41a surrounded by the cylinder member 41 and the piston 42 is formed in the cylinder member 41. The cylinder chamber 41a is connected to the supply path 24 between the shut valve 23 and the die 30. The volume of the cylinder chamber 41a is maximum when the piston 42 is positioned at the upper position, and is minimum when the piston 42 is positioned at the lower position. In this embodiment, the piston 42 reciprocates vertically, but may also reciprocate horizontally.

The suction mechanism 40 sucks the coating liquid 101 in the supply path 24 into the cylinder chamber 41a by moving the piston 42 from a lower position to an upper position. This suction is performed after the die 30 has finished discharging the coating liquid 101. The suction mechanism 40 also discharges the coating liquid 101 in the cylinder chamber 41a into the supply path 24 by moving the piston 42 from an upper position to a lower position. This discharge is performed as the coating liquid 101 is supplied from the supply mechanism 20 to the die 30. The suction mechanism 40 may also be referred to as a suction and discharge mechanism.

The die 30 is provided with a discharge port 30a connected to the supply mechanism 20 via a supply path 24. When the die 30 is positioned at the coating position P1, the die 30 discharges the coating liquid 101 supplied from the supply mechanism 20 via the supply path 24 from the discharge port 30a onto the first surface 100a of the film 100. The coating position P1 is a position where the vertical position of the center of the discharge port 30a is the same as the vertical position of the central axis C1 of the backup roll 10, and is a position where the first surface 100a of the portion 100c of the film 100 wound around the backup roll 10 and the discharge port 30a face each other in the horizontal direction. Therefore, in the die 30 positioned at the coating position P1, the discharge port 30a and the central axis C1 of the backup roll 10 are aligned in the horizontal direction. As a result, the die 30 positioned at the coating position P1 discharges the coating liquid 101 horizontally from the discharge port 30a.

The horizontal movement mechanism 50 can move the die 30 in a direction that changes the distance between the discharge port 30a of the die 30 positioned at the coating position P1 and the outer circumferential surface 10a of the backup roll 10, specifically in the horizontal direction. In detail, the horizontal movement mechanism 50 has a table 51, a motor 52, and a ball screw 53. The table 51 supports the die 30. In detail, a balance cylinder 80 is provided on the upper surface of the table 51, and the die 30 is fixed to a saddle 81 provided on the balance cylinder 80. The ball screw 53 converts the rotational motion of the motor 52 into horizontal linear motion of the table 51 and therefore the die 30.

The balance cylinder 80 is configured to be extendable and retractable in the vertical direction. A compressed air supply device 82 is connected to the balance cylinder 80 via a pressure reducing valve 83, and compressed air from the compressed air supply device 82 is reduced in pressure by the pressure reducing valve 83 and supplied to the balance cylinder 80. The balance cylinder 80 supports the weight of the die 30 with the compressed air from the compressed air supply device 82.

The vertical movement mechanism 60 can move the die 30 in the vertical direction. In detail, the vertical movement mechanism 60 has a base member 61, a motor 62, and a ball screw 63. The base member 61 is fixed to the upper surface of the table 51. The motor 62 and the ball screw 63 are supported by the table 51 via the base member 61. As a result, the vertical movement mechanism 60 moves in the horizontal direction together with the table 51. The ball screw 63 converts the rotational motion of the motor 62 into a vertical linear motion of the die 30. The balance cylinder 80 expands and contracts according to the vertical linear motion of the die 30. The vertical movement mechanism 60 positions the die 30 at the coating position P1 when the coating liquid 101 of the die 30 is discharged. In this embodiment, the weight of the die 30 is supported by the balance cylinder 80, so that the weight of the die 30 applied to the vertical movement mechanism 60 is canceled. The vertical movement mechanism 60 is an example of a movement mechanism.

Next, the details of the die 30 will be described with reference to FIG. 2. FIG. 2 is a cross-sectional view of the die 30. The die 30 is provided with a flow path 30b. A supply port 30c is formed at one end of the flow path 30b. The supply port 30c is connected to the supply path 24. A discharge port 30a is formed at the other end of the flow path 30b. The discharge port 30a is formed in a rectangular shape whose longitudinal direction is along the axial direction of the backup roll 10. A liquid reservoir 30d is formed between the supply port 30c and the discharge port 30a in the flow path 30b. The flow path 30b, together with the supply path 24, constitutes a flow path 90 that extends from the tank 21 to the discharge port 30a.

The die 30 also has a lip 30e. The lip 30e has an upper portion 30e1 and a lower portion 30e2. The lower portion 30e2 is provided vertically below the upper portion 30e1 with a gap therebetween. An outlet 30a is formed between the upper portion 30e1 and the lower portion 30e2.

The control device 70 shown in FIG. 1 is a control unit that controls the overall operation of the intermittent coating device 1 and realizes various functions of the intermittent coating device 1. The control device 70 executes various calculation processes and controls according to various programs. Motors 25, 29, 43, 52, 62, etc. are connected to the control device 70.

Next, the intermittent coating method performed by the intermittent coating device 1 under the control of the control device 70 will be described with reference to FIG. 3. FIG. 3 shows the coating operation of the intermittent coating device 1.

First, the intermittent coating device 1 starts discharging the coating fluid 101 from the die 30 positioned at the coating position P1, i.e., starts coating the first surface 100a of the film 100 with the coating fluid 101 ((1) in FIG. 3). As a result, the coating portion 102 starts to be formed from the front end 102a of the coating portion 102 in the conveying direction of the film 100. The front end 102a of the coating portion 102 can also be referred to as the starting end.

Next, the intermittent coating device 1 ends the coating by finishing the discharge of the coating fluid 101 by the die 30 and by sucking the coating fluid 101 in the supply path 24 by the suction mechanism 40 ((2) in FIG. 3). This completes the formation of the rear end 102b of the coating section 102 in the conveying direction of the film 100. In other words, the formation of the entire coating section 102 is completed. In addition, the suction of the coating fluid 101 in the supply path 24 by the suction mechanism 40 moves the coating fluid 101 at the discharge port 30a and around the discharge port 30a toward the liquid reservoir 30d. This reduces the amount of coating fluid 101 at the discharge port 30a and around the discharge port 30a. The rear end 102b of the coating section 102 can also be called the terminal end.

Next, the intermittent coating device 1 uses the vertical movement mechanism 60 to raise the die 30 from the coating position P1 to the upper position P2 (FIG. 3 (3)). The upper position P2 is a position D1 above the coating position P1 in the vertical direction.

Next, the intermittent coating device 1 uses the vertical movement mechanism 60 to lower the die 30 from the upper position P2 to the coating position P1 (Figure 3 (4)).

By performing the above series of operations, one coated area 102 is formed on the first surface 100a of the film 100. By repeating the above series of operations, the intermittent coating device 1 intermittently forms multiple coated areas 102 on the first surface 100a of the backup roll 10.

Next, the details of the control executed by the control device 70 in the above intermittent coating method will be described with reference to Figure 4. Figure 4 is a timing chart of the operation of the intermittent coating device 1. In the example of Figure 4, time passes in the order of time t1 to time t11. Just before coating begins (time t1), the shut valve 23 is closed, the relief valve 27 is open, and the piston 42 is positioned in the upper position. In addition, the die 30 is moved from the upper position P2 to the coating position P1 so that it is positioned at the coating position P1 at time t1.

The control device 70 controls the motors 25, 29 so that the shut valve 23 starts to open and the relief valve 27 starts to close simultaneously at time t2. This causes the relief valve 27 to close, stopping the return of the coating fluid 101 discharged from the pump 22 to the tank 21, and starts the supply of the coating fluid 101 from the supply mechanism 20 to the die 30, causing the die 30 to start discharging the coating fluid 101. Time t2 is the time when coating starts, i.e., the time when the formation of the coating portion 102 starts.

Next, the control device 70 controls the motor 43 so that the piston 42 starts moving from the upper position to the lower position, i.e., the piston 42 starts descending, at time t3. This causes the suction mechanism 40 to start discharging the coating liquid 101 into the supply path 24.

Next, the control device 70 controls the motor 25 so that the shut valve 23 starts to close at time t4. Closing of the shut valve 23 is completed at time t5.

Next, the control device 70 controls the motor 43 so that the piston 42 starts moving from the lower position to the upper position, i.e., the piston 42 starts rising, at time t5, i.e., simultaneously with the completion of closing of the shut valve 23. This causes the suction mechanism 40 to start suctioning the coating liquid 101 in the supply path 24. The piston 42 reaches the upper position at time t6. Time t5 is the time when the coating section 102 is being formed, and time t6 is the time when coating ends, i.e., the time when the formation of the coating section 102 ends. That is, the suction mechanism 40 suctions the coating liquid 101 in the supply path 24 while the coating section 102 is being formed.

Next, the control device 70 controls the motor 29 so that the relief valve 27 starts to open at time t6, i.e., at the same time as the piston 42 reaches the upper position. As a result, the coating fluid 101 discharged from the pump 22 is returned to the tank 21 via the return flow path 26a.

Next, the control device 70 controls the motor 62 so that the die 30 starts moving from the coating position P1 to the upper position P2, i.e., the die 30 starts rising, at time t7. The die 30 reaches the upper position P2 at time t8. Time t7 is, for example, 50 msec after time t6.

Next, the control device 70 controls the motor 62 so that the die 30 starts moving from the upper position P2 to the coating position P1, i.e., the die 30 starts descending, at time t9. The die 30 reaches the coating position P1 at time t10.

The control device 70 repeats the same series of processes performed between time t2 and time t10 from time t11 onwards.

Next, the details of the rising operation of the die 30 will be described with reference to Figures 5 and 6. Figure 5 is a diagram showing the rising operation of the die 30. Figure 6 is a diagram showing an image of the coated portion 102 formed on the film 100 by the intermittent coating method.

Figure 5 shows the movement of the die 30 and the coating section 102 from time t7 to time t8 in Figure 4. In the explanation of Figure 5, in order to distinguish the rear end 102b of the coating section 102, which is in a different position at each time, the rear end 102b is also referred to as the rear end 102b1, the rear end 102b2, and the rear end 102b3. In Figure 5, the die 30 at the coating position P1 at time t7 in Figure 4 and a part including the rear end 102b1 in the coating section 102 are shown by dashed lines. Also, in Figure 5, the entire die 30 at the upper position P2 at time t8 in Figure 4 and the coating section 102 are shown by solid lines and black paint, respectively. The rear end 102b at this time t8 is called the rear end 102b3. Also, in FIG. 5, the die 30 at an intermediate time between time t7 and time t8 in FIG. 4, i.e., the die 30 at intermediate position P3, which is a position on the way from coating position P1 to upper position P2, is shown by a dashed line, and a part of the coating section 102 including the rear end portion 102b2 at that intermediate time is shown by a dashed line.

As shown in FIG. 5, the vertical movement mechanism 60 moves the die 30 vertically upward D1. In detail, the vertical movement mechanism 60 moves the die 30 from the coating position P1 to the upper position P2 via the intermediate position P3 so that the tip of the lip 30e and the discharge port 30a of the die 30 are positioned vertically upward D1 from the rear end 102b of the coating section 102 (rear ends 102b1 to 102b3 in FIG. 5). In other words, the vertical movement mechanism 60 moves the die 30 so that the die 30 passes the rear end 102b of the coating section 102 vertically upward D1. At this time, the die 30 moves away from the first surface 100a of the film 100 and the outer peripheral surface 10a of the backup roll 10 as it moves vertically upward D1.

The vertical movement mechanism 60 raises the die 30 when a predetermined time has elapsed after the formation of the coating section 102 is completed. In FIG. 4, the predetermined time is the time from time t6 to time t7. The predetermined time is set to be equal to or longer than the time required for the coating section 102 to move from the point at which the formation of the coating section 102 is completed to a position of the coating section 102 where the die 30 moving vertically upward D1 does not come into contact with the rear end 102b of the coating section 102. This allows the entire die 30, including the lip 30e, to move vertically upward D1 without coming into contact with the rear end 102b of the coating section 102.

As shown in FIG. 5, when the die 30 and the coating section 102 move relative to each other, the coating fluid 101 has high spinnability, so that the coating fluid 101 may extend in a thread-like shape between the discharge port 30a of the die 30 and the rear end 102b of the coating section 102 while separated from the film 100, forming an extension portion 101a in the coating fluid 101 that is separated from the film 100. Even in such a case, the die 30 rises to the upper position P2 as described above, and the extension portion 101a is cut off. The coating fluid 101 that constituted the extension portion 101a does not adhere to the film 100 even after the extension portion 101a is cut off. At this time, it can be seen from FIG. 6 that when the coating section 102 is viewed from the thickness direction of the film 100, the rear end portion 102b of the coating section 102 has a shape that extends linearly along the width direction of the film 100, and dragging of the coating fluid 101 does not occur. The amount, timing, and speed of the rise of the die 30 are adjusted as appropriate according to the viscosity of the coating fluid 101 and the thickness of the coated portion 102. For example, the greater the amount and speed of the rise of the die 30, the easier it is for the coating fluid 101 to be cut off, so the greater the spinnability of the coating fluid 101, the greater the amount and speed of the rise of the die 30 can be. The vertical upward direction D1 is an example of the upward direction.

As described above, in this embodiment, when a predetermined time has elapsed after the formation of the coating section 102 is completed, the vertical movement mechanism 60 moves the die 30 vertically upward D1. Therefore, according to this embodiment, even if the coating fluid 101 has high spinnability, dragging of the coating fluid 101 from the rear end 102b of the coating section 102 can be suppressed. Therefore, the coating section 102 can be formed with high precision.

In addition, in this embodiment, the intermittent coating device 1 is equipped with a balance cylinder 80 that supports the weight of the die 30. Therefore, according to this embodiment, the balance cylinder 80 supports the weight of the die 30, thereby reducing the load on the vertical movement mechanism 60, making it possible to instantly move the die 30 vertically upward D1 by the vertical movement mechanism 60 and to reduce the size of the motor 62.

Comparative Example
Next, a comparative example will be described.

Figure 7 is a diagram for explaining the intermittent coating method of the first comparative example. Figure 8 is a diagram showing an image of the coated portion 102 formed on the film 100 by the intermittent coating method of the first comparative example. In the intermittent coating method of the first comparative example shown in Figure 7, after the coating of the die 30 is completed, i.e., after the formation of the coated portion 102 is completed, the vertical movement mechanism 60 does not raise the die 30 from the coating position P1 to the upper position P2. In other words, the die 30 is always positioned at the coating position P1. In this case, the coating liquid 101 at the tip of the lip 30e of the die 30 is pulled by the film 100, and as shown in Figure 8, drag of the coating liquid 101 occurs at the rear end 102b of the coated portion 102, and the drag of the coating liquid 101 forms a drag portion 104.

Figure 9 is a diagram for explaining the intermittent coating method of the second comparative example. Figure 10 is a diagram showing an image of the coated portion 102 formed on the film 100 by the intermittent coating method of the second comparative example. In the intermittent coating method of the second comparative example shown in Figure 9, the vertical movement mechanism 60 starts to raise the die 30 from the coating position P1 to the upper position P2 at the same time as the coating of the die 30 is completed. In this case, the coating liquid 101 adheres to the lower portion 30e2 of the lip 30e of the die 30, so that the coating liquid 101 is dragged at the rear end 102b of the coated portion 102 as shown in Figure 10, and the dragged coating liquid 101 forms a dragged portion 104.

Figure 11 is a diagram for explaining the intermittent coating method of the third comparative example. Figure 12 is a diagram showing an image of the coated portion 102 formed on the film 100 by the intermittent coating method of the third comparative example. In the intermittent coating method of the third comparative example shown in Figure 11, the vertical movement mechanism 60 starts to raise the die 30 from the coating position P1 to the upper position P2 at a time point earlier than the end of coating of the die 30. In this case, as shown in Figure 12, the die 30 rises during coating, and the coating liquid 101 adheres to the upper portion 30e1 and the lower portion 30e2 of the lip 30e of the die 30, so that the coating liquid 101 is dragged at the rear end 102b of the coated portion 102, and the dragged coating liquid 101 forms the dragged portion 104.

The rear end of the drag portion 104 in the first to third comparative examples is uneven. In addition, the length of the drag portion 104 in the transport direction of the film 100 is approximately the same in the second and first comparative examples, and is longer in the third comparative example than the first and second comparative examples.

In the above embodiment, the suction mechanism 40 includes a cylinder member 41 and a piston 42, but is not limited to this. For example, the suction mechanism 40 may include a diaphragm.

In addition, in the above embodiment, an example in which the balance cylinder 80 is provided is shown, but this is not limited to this. For example, instead of the balance cylinder 80, a counterweight that balances the weight of the die 30 and supports the weight of the die 30 may be provided. The balance cylinder 80 and the counterweight may also be referred to as a support part.

In the above embodiment, the coating position P1 is a position where the vertical position of the center of the discharge port 30a is the same as the vertical position of the central axis C1 of the backup roll 10, but this is not limited to this. For example, the coating position P1 may be a position where the vertical position of the center of the discharge port 30a is shifted from the vertical position of the central axis C1 of the backup roll 10. As an example, the coating position P1 may be a position where the vertical position of the center of the discharge port 30a is above the vertical position D1 of the central axis C1 of the backup roll 10.

In the above embodiment, the die 30 ejects the coating liquid 101 from the ejection port 30a in a horizontal direction, but this is not limiting. For example, the die 30 may be positioned to eject the coating liquid 101 at an angle to the horizontal direction.

In addition, in the above embodiment, an example of the upper side being the vertical upward direction D1 is shown, but this is not limited to this. For example, the upper side may be set to an upward direction rather than a vertical direction depending on the arrangement of the die 30 relative to the backup roll 10, the transport path of the film 100, etc.

Although several embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are included in the scope of the invention and its equivalents described in the claims.

1...intermittent coating device, 10...backup roll, 10a...outer periphery, 20...supply mechanism, 30...die, 30a...discharge port, 40...suction mechanism, 60...vertical movement mechanism (movement mechanism), 80...balance cylinder, 90...flow path, 100...film, 100a...first surface, 100b...second surface, 100c...part, 101...coating liquid, 102...coating section, 102a...front end, 102b...rear end, D1...upper, P1...coating position.

Claims (2)

a backup roll having a first surface and a second surface opposite to the first surface, the backup roll being in contact with the second surface of the substrate transported in the longitudinal direction and around which the substrate is wound;
a supply mechanism for intermittently supplying a coating liquid;
a die having a discharge port connected to the supply mechanism via a flow path, and discharging the coating liquid supplied from the supply mechanism from the discharge port onto the first surface at a coating position where the first surface of the portion of the base material wound around the backup roll faces the discharge port;
A moving mechanism for moving the die;
An intermittent coating method performed by an intermittent coating device comprising:
a step of forming a coating portion on the first surface of the base material, the first surface being wound around the backup roll and transported from below to above the central axis along a circumferential direction of the backup roll at the coating position by the die positioned at the coating position ejecting the coating solution onto the first surface in a horizontal direction toward a central axis of the backup roll ;
sucking the coating liquid in the flow path while the coating portion is being formed;
a step of, after the discharge of the coating liquid is terminated and the formation of the coated portion is completed by suctioning the coating liquid, when a predetermined time has elapsed that is equal to or longer than the time required for the rear end of the coating portion to move to a position where it does not come into contact with the die moving above the coating position , the moving mechanism moves the die to a position above the rear end of the coating portion ;
The intermittent coating method includes the steps of: a backup roll having a first surface and a second surface opposite to the first surface, the backup roll being in contact with the second surface of the substrate transported in the longitudinal direction and around which the substrate is wound;
a supply mechanism for intermittently supplying a coating liquid;
a die that is provided with a discharge port connected to the supply mechanism via a flow path, and discharges the coating liquid supplied from the supply mechanism from the discharge port in a horizontal direction toward a central axis of the backup roll toward a coating position where a first surface of the substrate and the discharge port face each other , thereby forming a coated portion on the first surface of the substrate that is wound around the backup roll and transported from below to above the central axis along the circumferential direction of the backup roll at the coating position;
a suction mechanism that sucks the coating liquid in the flow path;
a moving mechanism that moves the die to a position above the rear end of the coating unit when a predetermined time has elapsed that is equal to or longer than the time required for a rear end of the coating unit to move to a position where it does not come into contact with the die that moves above the coating position after discharging of the coating liquid has been stopped and formation of the coated unit has been completed by suctioning the coating liquid ;
A balance cylinder that supports the weight of the die;
An intermittent coating device equipped with the above.

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