JP2020028863A - Intermittent coating method and intermittent coating device - Google Patents

Abstract

To obtain an intermittent coating method which can suppress a drag of a coating liquid from a rear end part of a coating part even if the coating liquid is high in spinnability, and an intermittent coating device.SOLUTION: This intermittent coating method includes a process for forming a coating part on a first face by the discharge of a coating liquid to the first face of a base material by a die which is located in a coating position, and a process for making a moving mechanism move the die upward after the lapse of a prescribed time after a finish of the formation of the coating part.SELECTED DRAWING: Figure 3

Description

  An embodiment of the present invention relates to an intermittent coating method and an intermittent coating device.

  Conventionally, intermittent coating in which a coating liquid is intermittently discharged from a discharge port of a die to a first surface of a substrate to be conveyed and a plurality of coating portions are formed at intervals on the first surface of the substrate. An apparatus is known (for example, Patent Document 1). As this type of intermittent coating device, in order to improve the film thickness shape at the rear end of the coating part, the coating liquid is discharged from the die in order to eliminate the coating liquid from the die outlet. Is known (for example, Patent Document 2).

JP 2015-100786 A JP 2009-95752 A

  However, in the related art, when the coating liquid is easily elongated in a thread form, that is, when the spinning property of the coating liquid is high, even if the coating liquid is suctioned after the coating liquid is discharged from the die, the die and the coating section are not removed. The so-called coating liquid dragging in which the coating liquid extends between the rear end and the coating liquid following the rear end of the coating portion adheres to the first surface of the base material may occur. .

  The problem to be solved by the present invention is to provide an intermittent coating method and an intermittent coating method capable of suppressing drag of a coating liquid from a rear end portion of a coating section even with a coating liquid having a high spinnability. It is to obtain a working device.

  The intermittent coating method of the embodiment has a first surface and a second surface opposite to the first surface, the base material being in contact with the second surface of the base material transported in the longitudinal direction. And a supply mechanism for intermittently supplying the coating liquid, and a discharge port connected to the supply mechanism via a flow path, provided around the backup roll of the base material. A die for discharging the coating liquid supplied from the supply mechanism to the first surface from the discharge port at a coating position where the first surface and the discharge port of the portion are opposed to each other; and A moving mechanism for moving, and an intermittent coating method performed by an intermittent coating device including the die, wherein the die positioned at the coating position discharges the coating liquid onto the first surface. Forming a coating portion on the first surface, and at a predetermined time after the formation of the coating portion. Once There elapsed, and a step in which the moving mechanism moves the die upwards.

Drawing 1 is a lineblock diagram of an intermittent coating device of an embodiment. FIG. 2 is a cross-sectional view of the die according to the embodiment. FIG. 3 is a diagram illustrating 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 illustrating a raising operation of the die according to the embodiment. FIG. 6 is a diagram illustrating an image of a coating 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 illustrating an image of a coating 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 coating portion formed on a film by an 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 coating portion formed on a film by the intermittent coating method of the third comparative example.

  Hereinafter, exemplary embodiments of the present invention will be disclosed. The configurations of the embodiments described below, and the operations and effects provided by the configurations are examples. In this specification, ordinal numbers are used only for distinguishing parts and members, and do not indicate an order or a priority.

<Embodiment>
FIG. 1 is a configuration diagram of the intermittent coating device 1. The intermittent coating apparatus 1 forms a plurality of coating portions 102 having a substantially constant thickness on the film 100, for example, by intermittently applying a coating liquid 101 to the film 100 to be conveyed. 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 coating unit 102 is 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 be referred to as a web, the first surface 100a may be referred to as a front surface, and the second surface 100b may 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 provided rotatably around the central axis C1. Specifically, 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 in a state where the second surface 100b of the film 100 is in contact with the outer peripheral 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 wound around the backup roll 10 of the film 100 moves from the lower part in the vertical direction to the upper part D1 in the vertical direction. The backup roll 10 may be a driven roll that is rotated by a motor (not shown) or a driven roll that rotates as the film 100 moves.

  The supply mechanism 20 supplies the coating liquid 101 to the die 30 intermittently. Specifically, the supply mechanism 20 has a tank 21, a pump 22, and a shut 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 supplies the coating liquid 101 in the tank 21 to the die 30 via the supply path 24 by being driven by a motor (not shown). The shut valve 23 is provided in a supply path 24 between the pump 22 and the die 30. The shut valve 23 is driven by a motor 25 as a drive source to open and close the supply path 24. The motor 25 is, for example, a servomotor.

  Further, the supply mechanism 20 is 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 26 a connects the supply path 24 between the pump 22 and the shut valve 23 and the inlet of the tank 21. The relief valve 27 is provided in the return passage 26a. The relief valve 27 is driven by a motor 29 that is a driving source, and opens and closes the return passage 26a. The motor 29 is, for example, a servomotor. The pressure adjusting valve 28 is provided in a return flow path 26 a between the relief valve 27 and the supply mechanism 20.

  In the supply mechanism 20, the pump 22 is constantly driven during the coating operation. Then, 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. Thereby, the coating part 102 is formed 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, since the coating liquid 101 is not discharged from the die 30, the coating section 102 is not formed. The portion on the first surface 100a of the film 100 where the coating portion 102 is not formed forms a non-coating portion 103, and the coating portion 102 and the non-coating 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. Specifically, the suction mechanism 40 has a cylinder member 41 and a piston 42 slidably inserted into the cylinder member 41. The piston 42 is reciprocated in the vertical direction 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. In the cylinder member 41, a cylinder chamber 41a surrounded by the cylinder member 41 and the piston 42 is formed. 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 located at the upper position, and is minimum when the piston 42 is located at the lower position. In this embodiment, the piston 42 reciprocates in the vertical direction, but may move in the horizontal direction.

  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 the lower position to the upper position. This suction is performed after the discharge of the coating liquid 101 by the die 30 is completed. Further, the suction mechanism 40 discharges the coating liquid 101 in the cylinder chamber 41a to the supply path 24 by moving the piston 42 from the upper position to the 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 can also be called a suction and discharge mechanism.

  The die 30 is provided with a discharge port 30 a connected to the supply mechanism 20 via the supply path 24. The die 30 discharges the coating liquid 101 supplied from the supply mechanism 20 via the supply path 24 to the first surface 100a of the film 100 from the discharge port 30a while being located at the coating position P1. 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 the portion of the film 100 wound around the backup roll 10. This is a position where the first surface 100a of 100c and the discharge port 30a face in the horizontal direction. Therefore, in the die 30 located 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. Thereby, the die 30 located at the coating position P1 discharges the coating liquid 101 in the horizontal direction from the discharge port 30a.

  The horizontal moving mechanism 50 can move the die 30 in a direction in which the distance between the discharge port 30a of the die 30 located at the coating position P1 and the outer peripheral surface 10a of the backup roll 10 changes, specifically, in the horizontal direction. It is possible. Specifically, the horizontal movement mechanism 50 includes a table 51, a motor 52, and a ball screw 53. The table 51 supports the die 30. Specifically, 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 in the balance cylinder 80. The ball screw 53 converts the rotational motion of the motor 52 into a horizontal linear motion of the table 51 and thus of the die 30.

  The balance cylinder 80 is configured to be able to expand and contract 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 supplied to the balance cylinder 80 after being reduced in pressure by the pressure reducing valve 83. The balance cylinder 80 supports the weight of the die 30 by the compressed air from the compressed air supply device 82.

  The vertical moving mechanism 60 is capable of moving the die 30 in a vertical direction. Specifically, the vertical movement mechanism 60 includes 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. Thereby, the vertical movement mechanism 60 moves in the horizontal direction integrally 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 movement of the die 30. The vertical movement mechanism 60 positions the die 30 at the coating position P1 when the coating liquid 101 is discharged from the die 30. In the present embodiment, since the weight of the die 30 is supported by the balance cylinder 80, the weight of the die 30 applied to the vertical movement mechanism 60 is canceled. The vertical moving mechanism 60 is an example of a moving mechanism.

  Next, details of the die 30 will be described with reference to FIG. FIG. 2 is a 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. In addition, 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 from the tank 21 to the discharge port 30a.

  The die 30 has a lip 30e. The lip 30e has an upper portion 30e1 and a lower portion 30e2. The lower part 30e2 is provided with a space below the upper part 30e1 in the vertical direction. A discharge port 30a is formed between the upper part 30e1 and the lower part 30e2.

  The control device 70 illustrated in FIG. 1 is a control unit that controls the entire operation of the intermittent coating device 1 and realizes various functions of the intermittent coating device 1. The control device 70 executes various arithmetic processes and controls according to various programs. The motors 25, 29, 43, 52, 62 and the like are connected to the control device 70.

  Next, an 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. FIG. 3 is a diagram illustrating a coating operation of the intermittent coating device 1.

  First, the intermittent coating apparatus 1 starts discharging the coating liquid 101 by the die 30 located at the coating position P1, that is, starts coating the coating liquid 101 on the first surface 100a of the film 100 (FIG. 3 (1)). Thus, the coating portion 102 starts to be formed from the front end portion 102a of the coating portion 102 in the transport direction of the film 100. The front end 102a of the coating unit 102 may be referred to as a starting end.

  Next, the intermittent coating apparatus 1 ends the application by stopping the discharge of the coating liquid 101 by the die 30 and suctioning the coating liquid 101 in the supply path 24 by the suction mechanism 40 (FIG. 3 (2)). Thus, the formation of the rear end portion 102b of the coating section 102 in the transport direction of the film 100 is completed. That is, the formation of the entire coating section 102 is completed. The suction mechanism 40 sucks the coating liquid 101 in the supply path 24, so that the discharge port 30a and the coating liquid 101 around the discharge port 30a move toward the liquid reservoir 30d. Thereby, the amount of the coating liquid 101 is reduced in the discharge port 30a and around the discharge port 30a. The rear end part 102b of the coating part 102 can also be referred to as an end part.

  Next, the intermittent coating apparatus 1 raises the die 30 from the coating position P1 to the upper position P2 by the vertical movement mechanism 60 ((3) in FIG. 3). The upper position P2 is an upper position D1 in the vertical direction than the coating position P1.

  Next, the intermittent coating device 1 lowers the die 30 from the upper position P2 to the coating position P1 by the vertical movement mechanism 60 ((4) in FIG. 3).

  Through the above series of operations, one coating portion 102 is formed on the first surface 100a of the film 100. The intermittent coating apparatus 1 intermittently forms the plurality of coating portions 102 on the first surface 100a of the backup roll 10 by repeatedly performing the above-described series of operations.

  Next, the details of the control performed by the control device 70 in the intermittent coating method will be described with reference to FIG. FIG. 4 is a timing chart of the operation of the intermittent coating device 1. In the example of FIG. 4, time elapses in the order of time t1 to time t11. Immediately before the start of coating (time t1), the shut valve 23 is closed, the relief valve 27 is opened, and the piston 42 is located at the upper position. The die 30 is moved from the upper position P2 to the coating position P1 so as to be located at the coating position P1 at time t1.

  The control device 70 controls the motors 25 and 29 such that the opening of the shutoff valve 23 and the closing of the relief valve 27 are simultaneously started at time t2. Thereby, the relief valve 27 is closed, the return of the coating liquid 101 discharged from the pump 22 to the tank 21 is stopped, and the supply of the coating liquid 101 from the supply mechanism 20 to the die 30 is started. The discharge of the coating liquid 101 by the die 30 is started. Time t2 is the time of the start of the coating, that is, the time of the start of the formation of the coating part 102.

  Next, the control device 70 controls the motor 43 so that the movement of the piston 42 from the upper position to the lower position, that is, the lowering of the piston 42 is started at time t3. Thus, the discharge of the coating liquid 101 to the supply path 24 by the suction mechanism 40 is started.

  Next, the control device 70 controls the motor 25 such that the closing of the shut valve 23 is started at time t4. The closing of the shut valve 23 is completed at time t5.

  Next, the controller 70 controls the motor 43 so that the movement of the piston 42 from the lower position to the upper position, that is, the rise of the piston 42 is started at the time t5, that is, simultaneously with the completion of the closing of the shut valve 23, Control. Thereby, the suction of the coating liquid 101 in the supply path 24 by the suction mechanism 40 is started. The piston 42 reaches the upper position at time t6. The time t5 is a time during which the coating unit 102 is being formed, and the time t6 is a time when the coating is completed, that is, a time when the formation of the coating unit 102 is completed. That is, the suction mechanism 40 sucks the coating liquid 101 in the supply path 24 during the formation of the coating unit 102.

  Next, the control device 70 controls the motor 29 so that the opening of the relief valve 27 is started at time t6, that is, at the same time when the piston 42 reaches the upper position. Accordingly, the coating liquid 101 discharged from the pump 22 is returned to the tank 21 via the return flow path 26a.

  Next, the controller 70 controls the motor 62 so that the die 30 moves from the coating position P1 to the upper position P2, that is, the ascent of the die 30 starts at time t7. Die 30 reaches 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 movement from the upper position P2 of the die 30 to the coating position P1, that is, the lowering of the die 30 is started at time t9. The die 30 reaches the coating position P1 at time t10.

  Control device 70 repeatedly performs the same processing as the series of processing performed between time t2 and time t10 after time t11.

  Next, details of the raising operation of the die 30 will be described with reference to FIGS. FIG. 5 is a diagram showing the raising operation of the die 30. FIG. 6 is a diagram illustrating an image of the coating unit 102 formed on the film 100 by the intermittent coating method.

  FIG. 5 shows a state of movement of the die 30 and the coating unit 102 from time t7 to time t8 in FIG. In the description of FIG. 5, the rear end portion 102b is also referred to as a rear end portion 102b1, a rear end portion 102b2, and a rear end portion 102b3 for distinguishing the rear end portion 102b of the coating portion 102 that is different in position at each time. In FIG. 5, a portion including the die 30 at the coating position P1 and the rear end portion 102b1 of the coating portion 102 at the time t7 in FIG. 4 are indicated by alternate long and short dash lines. Further, in FIG. 5, the entire die 30 and the coating portion 102 at the upper position P2 at the time t8 in FIG. 4 are shown by solid lines and black, respectively. The rear end portion 102b at the time t8 is referred to as a rear end portion 102b3. In FIG. 5, the die 30 at the halfway point between the time t7 and the time t8 in FIG. 4, that is, the die 30 at the halfway position P3, which is a halfway position from the coating position P1 to the upper position P2, is one point. A portion including the rear end portion 102b2 of the coating portion 102 at the halfway time is indicated by a dashed line.

  As shown in FIG. 5, the vertical movement mechanism 60 moves the die 30 upward D1 in the vertical direction. More specifically, the vertical movement mechanism 60 is configured such that the tip of the lip 30e of the die 30 and the discharge port 30a are positioned vertically above the rear end 102b (the rear ends 102b1 to 102b3 in FIG. 5) D1 of the coating portion 102. The die 30 is moved from the coating position P1 to the upper position P2 via the intermediate position P3 so as to be positioned. That is, the vertical movement mechanism 60 moves the die 30 so that the die 30 passes the rear end portion 102b of the coating portion 102 upward D1 in the vertical direction. 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 upward D1 in the vertical direction.

  The raising of the die 30 by the vertical moving mechanism 60 is executed when a predetermined time has elapsed after the formation of the coating section 102 is completed. The predetermined time is a time from time t6 to time t7 in FIG. During the predetermined time, the coating unit 102 does not contact the die 30 moving upward D1 in the vertical direction and the rear end 102b of the coating unit 102 from the end of the formation of the coating unit 102. The time is set to be equal to or longer than the time required to move to the position of the unit 102. Thus, the entire die 30 including the lip 30e can move upward D1 in the vertical direction without hitting the rear end portion 102b of the coating portion 102.

  As shown in FIG. 5, when the die 30 and the coating unit 102 relatively move, the spinning property of the coating liquid 101 is high. In some cases, a stretched portion 101a that extends in a thread shape between the outlet 30a and the rear end portion 102b of the coating portion 102 and is separated from the film 100 is formed in the coating liquid 101. Even in such a case, the extending portion 101a is cut by raising the die 30 to the upper position P2 as described above. The coating liquid 101 constituting the extending portion 101a does not adhere to the film 100 even after the cutting of the extending portion 101a. At this time, when the coating portion 102 is viewed from the thickness direction of the film 100 from FIG. 6, the rear end portion 102b of the coating portion 102 has a shape extending linearly along the width direction of the film 100. It can be seen that drag of the working liquid 101 does not occur. The amount, timing and speed of the rise of the die 30 are appropriately adjusted according to the viscosity of the coating liquid 101 and the thickness of the coating part 102. For example, the coating liquid 101 is more likely to be cut as the rising amount and the rising speed of the die 30 are increased. Therefore, as the spinnability of the coating liquid 101 is higher, the rising amount and the rising speed of the die 30 can be increased. . The upper part D1 in the vertical direction is an example of the upper part.

  As described above, in the present embodiment, the vertical moving mechanism 60 moves the die 30 upward D1 in the vertical direction after a predetermined time has elapsed after the completion of the formation of the coating unit 102. Therefore, according to this embodiment, even with the coating liquid 101 having a high spinnability, dragging of the coating liquid 101 from the rear end portion 102b of the coating section 102 can be suppressed. Therefore, the coating part 102 can be formed with high accuracy.

  In this embodiment, the intermittent coating device 1 includes a balance cylinder 80 that supports the weight of the die 30. Therefore, according to the present embodiment, since the load applied to the vertical moving mechanism 60 is reduced by supporting the weight of the die 30 by the balance cylinder 80, the vertical moving mechanism 60 instantaneously moves the die 30 upward in the vertical direction D1. And the motor 62 can be downsized.

<Comparative example>
Next, a comparative example will be described.

  FIG. 7 is a diagram for explaining the intermittent coating method of the first comparative example. FIG. 8 is a diagram illustrating an image of the coating unit 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 FIG. 7, the die 30 is moved from the coating position P1 to the upper position P2 by the vertical moving mechanism 60 after the coating of the die 30 is completed, that is, after the formation of the coating part 102 is completed. Do not raise. That is, the die 30 is always located at the coating position P1. In this case, the coating liquid 101 at the tip of the lip 30 e of the die 30 is pulled by the film 100, thereby dragging the coating liquid 101 to the rear end 102 b of the coating section 102 as shown in FIG. Is generated, and a drag portion 104 is formed by the drag of the coating liquid 101.

  FIG. 9 is a diagram for explaining the intermittent coating method of the second comparative example. FIG. 10 is a diagram illustrating an image of the coating unit 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 FIG. 9, the die 30 is started to rise from the coating position P1 to the upper position P2 by the vertical movement mechanism 60 at the same time when the coating of the die 30 is completed. In this case, since the coating liquid 101 adheres to the lower part 30e2 of the lip 30e of the die 30, as shown in FIG. 10, the coating liquid 101 is dragged at the rear end 102b of the coating part 102. The drag portion 104 is formed by dragging the coating liquid 101.

  FIG. 11 is a diagram for explaining the intermittent coating method of the third comparative example. FIG. 12 is a diagram illustrating an image of the coating unit 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 FIG. 11, the die 30 is started to rise from the coating position P1 to the upper position P2 by the vertical movement mechanism 60 at a point earlier than the end of coating of the die 30. . In this case, the coating liquid 101 adheres to the upper part 30e1 and the lower part 30e2 of the lip 30e of the die 30 as shown in FIG. The coating liquid 101 is dragged at the rear end portion 102b of the processing portion 102, and the dragging portion 104 is formed by the dragging of the coating liquid 101.

  The rear ends of the drag portions 104 in the first to third comparative examples are all uneven. Further, the length of the drag portion 104 in the transport direction of the film 100 is substantially the same between the second comparative example and the first comparative example, and the third comparative example is longer than the first and second comparative examples.

  In the above-described embodiment, the example in which the suction mechanism 40 has the cylinder member 41 and the piston 42 has been described, but the present invention is not limited to this. For example, the suction mechanism 40 may have a configuration having a diaphragm.

  Further, in the above-described embodiment, an example is shown in which the balance cylinder 80 is provided, but the present invention is not limited to this. For example, instead of the balance cylinder 80, a counterweight that supports the weight of the die 30 in proportion to the weight of the die 30 may be provided. The balance cylinder 80 and the counterweight may be referred to as a support.

  Further, in the above-described embodiment, an example has been described in which 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. It is not limited to this. For example, the coating position P1 may be a position at which 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 D1 above the vertical position of the central axis C1 of the backup roll 10.

  Further, in the above embodiment, the example in which the die 30 discharges the coating liquid 101 in the horizontal direction from the discharge port 30a has been described, but the present invention is not limited to this. For example, the die 30 may be arranged so as to discharge the coating liquid 101 at an angle to the horizontal direction.

  Further, in the above embodiment, the example in which the upper part is the upper part D1 in the vertical direction is shown, but the present invention is not limited to this. For example, the upper side may be set not vertically but in accordance with the arrangement of the die 30 with respect to the backup roll 10, the transport path of the film 100, and the like.

  Although several embodiments of the present invention have been described, these embodiments are provided by way of example and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

  DESCRIPTION OF SYMBOLS 1 ... Intermittent coating device, 10 ... Backup roll, 10a ... Outer peripheral surface, 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 part, 102a: front end, 102b: rear end, D1 ... upper, P1 ... coating position.

Claims (4)

A backup roll around which the substrate is wound in contact with the second surface of the substrate transported in the longitudinal direction having a first surface and a second surface opposite to the first surface,
A supply mechanism for intermittently supplying the coating liquid,
A discharge port connected to the supply mechanism via a flow path is provided, and at a coating position where the first surface and the discharge port of the portion of the substrate wound around the backup roll face the discharge port, A die for discharging the coating liquid supplied from a supply mechanism to the first surface from the discharge port,
A moving mechanism for moving the die,
An intermittent coating method performed by an intermittent coating device having
Forming a coating portion on the first surface by discharging the coating liquid on the first surface, wherein the die located at the coating position;
When a predetermined time has elapsed after the completion of the formation of the coating portion, a step in which the moving mechanism moves the die upward,
Intermittent coating method.   2. The intermittent coating method according to claim 1, wherein a suction mechanism provided in the intermittent coating device includes a step of sucking the coating liquid in the flow path during the formation of the coating section. 3. A backup roll around which the substrate is wound in contact with the second surface of the substrate transported in the longitudinal direction having a first surface and a second surface opposite to the first surface,
A supply mechanism for intermittently supplying the coating liquid,
A discharge port connected to the supply mechanism via a flow path is provided, and at a coating position where the first surface and the discharge port of the portion of the substrate wound around the backup roll face the discharge port, A die for discharging the coating liquid supplied from a supply mechanism to the first surface from the discharge port,
A moving mechanism for moving the die upward,
A balance cylinder supporting the weight of the die,
Intermittent coating device equipped with   The intermittent coating device according to claim 3, further comprising a suction mechanism that suctions the coating liquid in the flow channel.