JP2011156447A - Intermittent coating method and intermittent coating device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an intermittent coating method which enables the starting edge and the ending edge of a coating area to approach to linear lines without making them curbed significantly, as well as an intermittent coating device. <P>SOLUTION: The preset time T1 is set before/after the time at which the coating surface Wa of a base W begins to be brought into contact with a coating liquid on the outer circumferential surface of a coating roll 6 during coating operation. The preset time T2 is set before/after the time at which the coating surface Wa of the base W is made to break away from the coating liquid on the outer circumferential surface of the coating roll 6 during non-coating operation. The proceeding/receding position of a tension adjusting roll 4 is controlled following the forward/backward transfer of a coating changeover roll 3 so that the tension value of the base W within the preset time T1 and T2 is increased more than the tension value at any other time than the preset time T1 and T2. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  In the present invention, the coating surface of a long sheet-like substrate is brought into contact with or separated from the coating liquid carried on the outer peripheral surface of the rotating coating roll, whereby the coating surface of the substrate is coated. The present invention relates to an intermittent coating method and an intermittent coating apparatus for alternately forming a work area and a non-coating area.

  Conventionally, the intermittent coating apparatus has an upstream reference roll at a fixed position, which is provided in order in the traveling direction so as to form the non-coating surface side of the substrate traveling path, an actuating roll that can move forward and backward, The tension roll and the guide roll on the downstream side of the fixed position, the coating roll provided between the reference roll and the working roll at the fixed position on the coating surface side of the substrate running path, and the working roll running on the substrate Operates with servo motors that advance and retreat along the direction from the non-coating surface side to the coating surface side of the road, and an air cylinder that presses the tension roll from the non-coating surface side to the coating surface side of the substrate running path The roll is advanced and retracted by the rotational force of the servo motor, and the pressing force of the air cylinder is applied to the tension roll (Patent Document 1).

  The intermittent coating method using the above intermittent coating apparatus is a coating roll in which a base material is run around a reference roll and an operating roll, and a coating agent is carried on a base material located between the reference roll and the operating roll. To form a coating film by transferring the coating agent to the surface of the base material, and the working roll is retracted in a direction from the surface of the base material (coating surface) to the back surface (non-coating surface) at a predetermined timing. The base material is separated from the coating roll, the tension roll is advanced in the direction from the back surface to the front surface of the base material to apply tension to the base material, and then the working roll is moved at a predetermined timing. Advancing in the direction from the back surface to the front surface of the base material to bring the base material into contact with the coating roll, and following this, the tension roll is retracted in the direction from the front surface to the back surface of the base material and applied to the surface of the base material. In an intermittent arrangement of the membrane While forming, as the tension loaded on the substrate always becomes constant, it is controlled to retract, advance the tension roller in conjunction with the advance and return of the working roll.

  The control for controlling the air cylinder that applies pressure to the tension roll operates the air cylinder via the cylinder actuating portion at the timing of controlling the rotation of the servo motor for the action roll, and moves the tension roll from the front surface to the back surface. Control of moving or displacing in the backward direction or the forward direction from the back surface to the front surface of the base material, and the pressure detection unit that detects the air pressure of the air cylinder corresponding to the reaction force due to the tension loaded on the base material The air cylinder is feedback-controlled through the cylinder operating section so that the detected value is always a constant value.

JP2007-117973A

  The base material that travels in the traveling direction including the horizontal component undergoes bending deformation according to the magnitude of the tension in the traveling direction in the longitudinal direction along the traveling direction and the width direction orthogonal to the longitudinal direction. Regarding the bending deformation in the width direction, the amount of bending due to the weight of the substrate gradually increases as it goes from both ends of the substrate toward the center, and the amount of bending at the center in the low tension state is larger than that in the high tension state. growing. When the traveling base material is made to approach the coating liquid on the coating roll in a state where the central part in the width direction is bent, the contact with the coating liquid starts from the central part where the bending amount in the width direction is large. As it starts and shifts to both ends, as shown in FIG. 7A, the starting edge of the coating area becomes a curved state protruding in the running direction. On the other hand, when the base material in running advances the separation from the coating liquid on the coating roll, the separation from the coating liquid starts from both sides with a small amount of deflection and shifts to the center part. The end edge of the coating area is in a curved state protruding in the direction opposite to the traveling direction.

  By the way, a base material is high about the tension | tensile_strength of the running direction in coating, without producing the abrasion by the outer peripheral surface of a coating roll on a base-material surface (coating surface), and maintaining an optimal coating state. Cannot be set to a value. In the conventional intermittent coating method using the intermittent coating apparatus, the tension in the running direction applied to the substrate is always kept constant by controlling the tension roll, so that the optimum coating can be performed without setting a high value. Since it must be set to a low value for maintaining the state, the start edge and the end edge of the coating area may be greatly curved. Since the start edge and the end edge of the coating area may cause inconveniences in the subsequent process or the like due to the large curvature, there is a demand to make the coating area close to a straight line without being largely curved.

  The present invention aims to provide an intermittent coating method and an intermittent coating apparatus that can be made to approach a straight line without greatly bending the start edge and the end edge of the coating area in order to meet the above requirements. is there.

  The means employed by the present invention according to claim 1 in order to make it possible to make the start edge and the end edge of the coating area close to a straight line without being greatly curved, as shown in FIG. The upstream reference roll 2 at a fixed position, the coating switching roll 3 that can move forward and backward, the tension adjusting roll 4 that can move forward and backward, and the downstream reference roll 5 at a fixed position that are provided in order toward the arrow S direction. The base material W is run in a state where tension is applied while supporting and guiding the non-coated surface Wb of the base material W, and the coating switching roll 3 is moved from the non-coated surface Wb side of the base material W while the base material is running. Advancing from the non-coating operation position D to the coating operation position E toward the coating surface Wa side and the non-coating operation of the tension adjusting roll 4 from the coating surface Wa side of the substrate W toward the non-coating surface Wb side Retract from position F to coating operation position G, upstream reference low The coating of the substrate W is applied to the coating liquid on the outer peripheral surface 6a of the rotating coating roll 6 provided between the coating roller 2 and the coating switching roll 3 at a fixed position on the coating surface Wa side of the substrate W. A coating operation in which the work surface Wa is brought into contact with each other to form a coating area K (see FIG. 7B), and the coating switching roll 3 is moved from the coating operation position E to the non-coating operation position while the substrate is running. The tension adjusting roll 4 is moved backward from the coating operation position G to the non-coating operation position F, and the coating surface Wa of the substrate W is separated from the coating liquid on the outer peripheral surface of the coating roll 6. In the intermittent coating method in which the non-coating operation for forming the non-coating zone J (see FIG. 7B) is alternately repeated, the coating liquid on the outer peripheral surface of the coating roll 6 in the coating operation is applied. Set time T1 (see FIG. 6) set before and after the start of contact of the coating surface Wa of the substrate W, and coating in a non-coating operation The tension value of the base material W in each time of the set time T2 (see FIG. 6) set before and after starting the separation of the coating surface Wa of the base material W with respect to the coating liquid on the outer peripheral surface of the tool 6 is The intermittent coating method is characterized by controlling the advancing / retreating position of the tension adjusting roll 4 so as to follow the advancing / retreating movement of the coating switching roll 3 so as to increase the tension value outside these set times. .

  The means adopted by the present invention as claimed in claim 2 in order to make it possible to make the start edge and the end edge of the coating area close to a straight line without being greatly curved, as shown in FIG. An upstream reference roll 2 in a fixed position, which is provided in order in the base material traveling direction (arrow S direction) so as to form the non-coating surface Rb side of R, a coating switching roll 3 which can freely advance and retreat, and advance and retreat Between the flexible tension adjusting roll 4 and the downstream reference roll 5 at a fixed position, and between the upstream reference roll 2 and the coating switching roll 3, at a fixed position on the coating surface Ra side of the substrate traveling path R. The provided coating roll 6 and the coating switching roll 3 are moved back and forth from the non-coating operation position D to the coating operation position E from the non-coating surface Rb side of the substrate traveling path R toward the coating surface Rb side. In addition, the coating switching roll operation is advanced in the opposite direction. The apparatus 7 and the tension adjusting roll 4 are retracted from the non-coating operation position F to the coating operation position G from the coating surface Ra side of the base material traveling path R toward the non-coating surface Rb side, and in the opposite direction. The tension adjusting roll operating device 8 to be moved forward, the coating switching roll operating device 7 and the tension adjusting roll operating device 8 are controlled, and the substrate running path is formed on the outer peripheral surface 6 a of the coating roll 6. A control device that repeats a coating operation for bringing the coating surface Ra side of R into contact with or approaching the coating and a non-coating operation for separating the coating surface Ra side of the substrate traveling path R from the outer peripheral surface 6a of the coating roll 6 9, the control device 9 is a base material pass line PL from the upstream side reference roll 2 to the downstream side reference roll 5 of the base material traveling path R (see FIG. 6). The outer peripheral surface 6 of the coating roll 6 in the coating operation Of the base material travel path R from the set time T1 set before and after starting the coating surface side contact or the coating approach of the base material travel path R and the outer peripheral surface 6a of the coating roll 6 in the non-coating operation. The forward / backward movement of the coating switching roll 3 is performed so that the dimensional value at each of the set times T2 set before and after starting the separation on the coating surface Ra side is larger than the dimensional values at times other than these set times. The intermittent coating apparatus is characterized in that the advance / retreat position of the tension adjusting roll 4 is controlled following the movement.

  The intermittent coating method according to the first aspect of the present invention is the set time before and after the start of contact of the coating surface of the substrate with the coating liquid on the outer circumferential surface of the coating roll and the outer circumferential surface of the coating roll. Within each set time before and after starting to separate the coated surface of the base material from the upper coating liquid, the base material tension is increased more than the tension value other than these set times, and the width direction of the base material By reducing the amount of bending of each of the conventional rolls, the time difference for starting contact or the time difference for starting separation between the both ends in the width direction of the substrate with respect to the coating liquid on the coating roll and the central portion is reduced. Compared to the case where the tension applied to the material is always constant, the start and end of the coating area can be made closer to a straight line without being greatly bent.

  The intermittent coating apparatus according to the second aspect of the present invention provides a coating roll when intermittent coating is performed on a substrate traveling on a substrate traveling path by supporting a coating liquid on the outer peripheral surface of the coating roll. Set time before and after starting the contact of the coated surface of the substrate with the coating liquid on the outer peripheral surface of the substrate, and before and after starting to separate the coated surface of the substrate from the coating liquid on the outer peripheral surface of the coating roll Within each of the set times, the substrate pass line dimensions are increased from those other than these set times, and the substrate tension is increased above these other set times. By reducing the amount of bending in the width direction of the material, each of the time difference for starting contact or the time difference for starting separation between the both ends in the width direction of the substrate with respect to the coating liquid on the coating roll and the central portion is reduced. The tension applied to the conventional substrate is always constant Compared to if, can be brought close to a straight line without being bent largely for beginning and end of the coating zone.

1 shows an embodiment of an intermittent coating method and an intermittent coating apparatus (hereinafter referred to as “the present invention coating method” and “the present invention coating apparatus”) according to the present invention. 3 is a front view showing a standby state of the device 1. FIG. FIG. 2 is a right sectional view taken along line II-II in FIG. 1, showing a state in which the elevating frame 13 is located at a standby position M. 3 is a right sectional view showing a state of a non-coating operation of the present coating apparatus 1 (a state where the base material W is separated from a coating liquid (not shown) on the outer peripheral surface 6a of the coating roll 6). FIG. The main part of this invention coating apparatus 1 is expanded, Comprising: FIG. (A) shows the state of non-coating operation with a continuous line, and the state of coating operation (the base material W is the outer peripheral surface of the coating roll 6). FIG. 6B is a right cross-sectional view showing a coating solution (not shown) on 6a in a state of being in contact with a two-dot chain line, and FIG. 5B and FIG. 5C schematically show the roll operating device 7 (8). It is a side view. It is the right side sectional view which expands the important section of the present invention coating device 1, and shows the state of coating operation. Fig. (A) is a graph showing the relationship between the position (vertical axis) in the advancing and retreating direction of the coating switching roll 3 and the tension adjusting roll 4 and the elapsed time (horizontal axis) of the operation, and Fig. (B) is the substrate path A graph showing the relationship between the dimension of the line PL (vertical axis) and the elapsed time of operation (horizontal axis), FIG. (C) is the relationship between the tension (vertical axis) of the substrate W and the elapsed time of operation (horizontal axis). (D) is a graph showing the relationship between the peripheral speed (vertical axis) of the outer peripheral surface 6a of the coating roll 6 and the elapsed time (horizontal axis) of the operation, and FIG. The relationship between the state of the base material W with respect to the outer peripheral surface 6a and the operation elapsed time (horizontal axis) is shown. FIG. (F) shows the relationship between each time zone and the operation elapsed time (horizontal axis). . FIG. 1A is a plan view showing a conventional coating state, and FIG. 1B is a plan view showing a coating state by an intermittent coating method and an intermittent coating apparatus according to the present invention.

  As shown in FIGS. 1 to 3, the coating apparatus 1 of the present invention has a frame structure that is connected by connecting frames 10, 10... Extending in the left-right direction (longitudinal direction of each roller described later) and connecting frames 10, 10. The left and right fixed frames 11, 11, and the left and right fixed frames 11, 11 are provided with left and right lift frames 13, 13 provided to be movable up and down via a lift guide device 12. The elevating guide device 12 includes a guide rail 17 attached to the fixed frame 11, a slider 18 attached to the elevating frame 13 and guided to the guide rail 17, and an upper standby position M (see FIG. 2) below the elevating frame 13. The movement operation tool 19 which consists of an air cylinder etc. which are moved between the coating operation positions N (refer FIG. 3) is comprised.

  The coating apparatus 1 of the present invention is configured to form a base material traveling path R for traveling the base material W by a group of rolls arranged in the frame structure. As shown in FIG. 3, the roll group is directed toward the traveling direction (the direction of the arrow S) so as to form the non-coated surface Rb side of the substrate traveling path R (that is, from the upstream side of the substrate traveling path R). The upstream reference roll 2 in a fixed position in order (toward the downstream side), the coating switching roll 3 that can move forward and backward, the tension adjustment roll 4 that can move forward and backward, the downstream reference roll 5 in a fixed position, and the upstream side A coating roll 6 at a fixed position between the reference roll 2 and the coating switching roll 3 and forming the coating surface Ra side of the substrate traveling path R, and a substrate traveling further upstream than the upstream reference roll 2. Fixed position guide rolls 21, 21 that form the path R, and fixed position guide rolls 22 that form the non-coating surface Rb side of the base material traveling path R further downstream than the downstream side reference roll 5 are provided. . A feed roll (not shown) for forming the substrate traveling path R is provided further upstream than the guide rolls 21 and 21.

  As shown in FIG. 3, the left and right fixed frames 11, 11 are constructed such that the upstream guide rolls 21, 21 and the downstream guide roll 22, and the coating roll 6 are installed at predetermined fixed positions. The left and right elevating frames 13 and 13 are constructed such that the upstream reference roll 2 and the downstream reference roll 5 are installed and stopped at the lower coating operation position N, so that the upstream reference roll 2 and the downstream reference roll 5 are stopped. The upstream reference roll 2 and the downstream reference roll 5 are stopped at the standby position by stopping the roll 5 at a predetermined fixed position and stopping at the upper standby position M (see FIG. 2). . Further, the left and right lifting frames 13 and 13 are provided with left and right coating switching roll operating devices 7 and 7 and left and right tension adjusting roll operating devices 8 and 8, respectively. , 7 is provided so that the coating switching roll 3 can be moved forward and backward, and the tension adjusting roll 4 is provided so as to be movable forward and backward via the tension adjusting roll operating devices 8, 8.

  As shown in FIG. 3, the upstream reference roll 2, the coating switching roll 3, the tension adjusting roll 4, and the downstream reference roll 5 that form the non-coating surface Rb side of the substrate running path R It guides the non-coated surface Wb of the substrate W traveling on the road R, and is a free-rolling roll. As the upstream reference roll 2, the coating switching roll 3, and the tension adjusting roll 4, those having a roll outer peripheral surface diameter in the range of 40 mm to 80 mm (preferably 45 to 60 mm) are used. The upstream guide rolls 21 and 21 and the downstream guide roll 22 have a roll outer diameter within a range of 100 mm to 150 mm, and the upstream guide rolls 21 and 21 are freely rotatable. In addition, the downstream guide roll 22 is a drive roll that is forcibly driven by a drive device (not shown). A feed roll (not shown) provided further upstream than the guide rolls 21 and 21 is a drive roll that is forcibly driven by a drive device (not shown), and together with the downstream guide roll 22 that is a drive roll, the substrate W To drive at a set speed. The downstream guide roll 22 is sucked to the outer peripheral surface of the roll in order to eliminate the slip between the outer peripheral surface of the roll and the base material W having a small winding angle and to drive the base material W at a set speed. It may be a suction type with a mouth open. The upstream feed roll (not shown), which is a driving roll, and the downstream guide roll 22 have a tension cut function that prevents the upstream tension and the downstream tension of the base material W from affecting each other around each roll. Therefore, it is possible to temporarily increase the tension in the traveling direction of the substrate W from the upstream reference roll 2 to the downstream reference roll 5 of the substrate W.

  The coating roll 6 has a roll outer peripheral surface having a diameter of 40 mm to 80 mm (preferably 45 to 55 mm) and is forcibly driven by a driving device 34 (see FIG. 1), so that the outer circumference of the roll The coating liquid (not shown) carried on the surface 6a is transferred and applied to the coating surface Wa of the substrate W traveling on the substrate traveling path R. Further, the coating roll 6 is driven so as to be capable of variable speed, and decelerates for a set time T3 (see FIG. 6) set before and after the moment when the base material W starts to separate from the roll outer peripheral surface 6a (see FIG. 6D). The base material W is smoothly separated while suppressing the splashing of the coating liquid from the outer peripheral surface 6a of the roll.

  As shown in FIGS. 1 to 3, the coating means 39 having the coating roll 6 is provided on the outer peripheral surface 6a of the coating roll 6 in addition to the gravure-type coating roll 6 provided with a recess on the outer peripheral surface 6a. The coating liquid adhesion tank 35 for adhering the coating liquid, the doctor 37 for scraping off the excess coating liquid adhered to the outer peripheral surface 6a of the coating roll 6, and the coating liquid adhesion tank 35 in the standby position (see FIG. 2). The tank lifting device 36 that moves up and down from the position shown in FIG. 3 to the attachment position (position shown in FIG. 3) and the doctor 37 are moved back and forth from the standby position (position shown in FIG. 2) to the scraping position (position shown in FIG. 3). A doctor movement device 38. The tank lifting device 36 and the doctor moving device 38 are attached to the left and right fixed frames 11, 11. The coating roll 6 rotates the outer peripheral surface 6a in the direction opposite to the traveling direction of the substrate W, and reverse kisses are transferred to the coating surface Wa of the substrate W on the coating liquid carried in the recesses of the outer peripheral surface 6a. It is designed to be a coating method. In addition to the gravure type, the coating roll 6 can also be selected from a wire bar system in which a thin wire is wound around the outer peripheral surface of the rod-shaped material and the coating liquid is supported in a spiral groove formed between the wires.

  As shown in FIG. 4, each of the left and right coating switching roll operating devices 7 and 7 rotatably supports the coating switching roll 3 and is attached to a lifting frame 13 (see FIGS. 1 to 3). A roll support portion 26 having a slider 25 attached to the guide rail 24 so as to be able to advance and retreat, a drive source 27 comprising an electric servomotor attached to the elevating frame 13 and capable of positioning control and speed control, and the roll support portion 26 and the drive. A power transmission mechanism 28 is provided between the power sources 27 and transmits the rotation output of the electric servo motor to the roll support 26 to move the coating switching roll 3 forward and backward. The drive source 27 adopts a program table and sets the stop position and the passing position of the coating switching roll 3 and the speed and adjustment time when the coating switching roll 3 moves forward / backward. Thus, the later-described positioning of the coating switching roll 3 can be easily realized. The power transmission mechanism 28 includes a crank 31 attached to the output shaft 27a of the drive source 27, and a connecting rod 32 that rotates around both ends of the crank 31 and the roll support portion 26 and is connected by a pair (a combination of a shaft and a bearing). The combination of the guide rail 24, the slider 25 and the crank 31 constitutes a slider crank mechanism comprising a four-bar chain with little play and good responsiveness. The left and right coating switching roll operating devices 7 and 7 operate the left and right drive sources 27 and 27 in a synchronized state so that the coating switching roll 3 can be moved from the non-coating surface Rb side of the substrate traveling path R. It smoothly and quickly advances and retracts while maintaining a parallel state from the non-coating operation position D to the coating operation position E toward the coating surface Ra.

  Each of the left and right tension adjusting roll operating devices 8 and 8 is configured in the same manner as the coating switching roll operating device 7 as shown in FIG. A roll support portion 26 having a slider 25 attached to the guide rail 24 attached to the elevating frame 13 (refer to FIGS. 1 to 3) and supported to be rotatable, and a positioning control and speed attached to the elevating frame 13 A drive source 27 composed of a controllable electric servo motor, and provided between the roll support portion 26 and the drive source 27, and transmits the rotation output of the electric servo motor to the roll support portion 26 so that the roll 4 for tension adjustment is provided. And a power transmission mechanism 28 that moves forward and backward. The drive source 27 adopts a program table, and sets a stop position and a passing position of the tension adjusting roll 4, a speed at the time of forward / backward movement of the coating switching roll 3, an adjustment time, and the like. Therefore, the tension adjusting roll 4 can be easily positioned as described later. The power transmission mechanism 28 includes a crank 31 attached to the output shaft 27a of the drive source 27, and a connecting rod 32 that rotates around both ends of the crank 31 and the roll support portion 26 and is connected by a pair (a combination of a shaft and a bearing). The combination of the guide rail 24, the slider 25 and the crank 31 constitutes a slider crank mechanism comprising a four-bar chain with little play and good responsiveness. The right and left tension adjusting roll operating devices 8 and 8 operate the left and right drive sources 27 and 27 in a synchronized state so that the tension adjusting roll 4 is removed from the coating surface Ra side of the substrate running path R. It smoothly and promptly advances and retracts while maintaining a parallel state from the non-coating operation position F to the coating operation position G toward the coating surface Rb side.

  The control device 9 (see FIG. 1) for controlling the coating switching roll operating devices 7 and 7 and the tension adjusting roll operating devices 8 and 8 includes a coating roll 6 as shown in FIG. Coating operation (the state indicated by a two-dot chain line in the figure) for bringing the coating surface Ra side of the substrate running path R into contact with the outer peripheral surface 6a or approaching the coating (approaching the coating state without contact) An operation device for a coating switching roll so as to alternately repeat a non-coating operation (a state indicated by a solid line in the figure) for separating the coating surface Ra side of the substrate traveling path R from the outer peripheral surface 6a of the work roll 6. 7 and 7 and a signal for starting and stopping are transmitted to the respective drive sources 27 of the tension adjusting roll operating devices 8 and 8. For example, as shown in FIG. 6, the control unit 9 is configured to move the coating switching roll 3 and the tension adjusting roll 4 in positions along the advancing / retreating direction (see FIG. 6A), upstream of the substrate traveling path R. Relationship between the dimension value of the substrate pass line PL from the reference roll 2 to the downstream reference roll 5 (see FIG. (B)) and the state of the substrate W with respect to the outer peripheral surface 6a of the coating roll 6 (see FIG. (E)). A position for moving the tension adjusting roll 4 for obtaining a dimensional value that changes in advance for the base material pass line PL as the coating switching roll 3 moves. And a command unit for transmitting a start / stop signal to the driver unit of each drive source 27 of the roll operating devices 7, 7 and 8, 8 based on the result of the calculation unit.

  The coating switching roll operating devices 7 and 7 and the tension adjusting roll operating devices 8 and 8 that have received a command from the control device 9 are, for example, as shown in FIG. When the tension adjusting roll 4 is moved from the position D to the coating operation position E at a constant speed (see FIG. 1A), the tension adjusting roll 4 is moved from the non-coating apparatus position F to the coating operation position G at a variable speed. By moving (see FIG. (A)), the dimension value (FIG. 5) of the base material pass line PL corresponding to the change in the state of the base material W with respect to the outer peripheral surface 6a of the coating roll 6 (see FIG. (E)). 6 (B)), and when the application switching roll 3 is moved from the coating operation position E to the non-coating apparatus position D at a constant speed (see FIG. (A)), The tension adjusting roll 4 can be changed from the coating operation position G to the non-coating apparatus position F. Dimensional value for changing the substrate pass line PL in accordance with a change in the state of the substrate W with respect to the outer peripheral surface 6a of the coating roll 6 (see FIG. (E)) by moving it at a degree (see FIG. (A)). (See FIG. 6B). Further, the roll operating devices 7, 7, 8, and 8 stop the coating switching roll 3 at the coating device position E and stop the tension adjusting roll 4 at the coating operation position G. By maintaining the dimension of the line PL at the reference dimension, and further moving the application switching roll 3 to the non-coating apparatus position D and stopping the tension adjusting roll 4 to the non-coating operation position F, the substrate pass line The dimension of PL is maintained at the standard dimension.

  The base material W traveling on the base material travel path R for coating is guided so as not to slide on the outer peripheral surfaces of the upstream guide rolls 21 and 21 and the downstream guide roll 22, so that the travel direction The tension is cut between the portion from the upstream reference roll 2 to the downstream reference roll 5 and the upstream portion from the guide rolls 21 and 21 and the downstream portion from the guide roll 22. become. Therefore, the base material W undergoes elastic deformation at the portion of the base material pass line PL in accordance with a change in the dimensional value of the base material pass line PL from the upstream side reference roll 2 to the downstream side reference roll 5, and the tension also changes. (See FIGS. 6B and 6C).

  As shown in FIG. 7B, the inventor of the present application repeated a number of experiments in order to make the starting edge and the ending edge of the coating area K close to a straight line without greatly bending, and the basis for the coating roll 6 was repeated. Before and after the moment when the material W starts to contact and before and after the moment when the base material W starts to separate from the coating roll 6, the tension in the running direction of the base material W is temporarily increased to increase the width of the base material W. The inventors have found that this can be achieved by reducing the amount of bending in the direction (direction perpendicular to the traveling direction), and have reached the present invention. The coating apparatus 1 of the present invention issues a start / stop command from the control device 9 to the drive sources 27 of the roll operating devices 7, 7, 8, and 8, and from the upstream reference roll 2 of the substrate running path R. About the dimension value of the substrate pass line PL reaching the downstream side reference roll 5, the coating surface Ra side of the substrate traveling path R with respect to the outer peripheral surface 6a of the coating roll 6 in the coating operation (that is, the coating surface Wa of the substrate W). Side) or set time T1 (see FIG. 6) set before and after starting the coating approach, and the coating surface Ra of the substrate travel path R from the outer peripheral surface 6a of the coating roll 6 in the non-coating operation. Dimension values within the set time T2 set before and after starting the separation of the side (that is, the coated surface Wa side of the substrate W) are dimension values (reference dimensions) other than the set times T1 and T2. Value) (see FIG. 6B) It is to perform the control of the forward and backward position of the tension adjusting roll 4 to follow the forward and backward movement of the coating switching rolls 3. These set times T1 and T2 are set such that the travel speed of the substrate W is 5 to 15 m / mim so that the movement dimension of the substrate W in the travel direction within the set times T1 and T2 can be set within a range of 5 to 50 mm. In this case, it is selected within the range of 2/100 seconds to 20/100 seconds. The dimension values (reference dimension values) other than the set times T1 and T2 of the base material pass line PL are applied by the coating roll 6 to the base material W located on the base material pass line PL or the base material W in a non-coated state. The reference tension state of the base material W that can smoothly travel is set to a value that can be obtained. In addition, the dimension value (reference dimension value) at the set times T1 and T2 of the base material pass line PL is such that the coating surface Wa of the base material W positioned on the base material pass line PL is relative to the outer peripheral surface 6a of the coating roll 6. When starting contact or coating approach (not touching but approaching to the coating state) or starting separation, the amount of deflection in the substrate width direction of the substrate W is temporarily reduced to reduce the coating area K. It is set to a value at which a high tension state of the base material W that can bring the start end and the end close to a straight line (see FIG. 7B) can be obtained.

  As shown in FIGS. 1 to 3, the coating apparatus 1 of the present invention first lifts the lifting frame 13 to the standby position M (see FIG. 2) by the lifting guide device 12, so that the substrate W is first moved to the substrate traveling path. Although it is easy to carry out the operation of passing through R, it is not limited to this and is not shown. However, the upstream side reference roll 2 attached to the elevating frame 13, the left and right coating switching roll operating devices 7, 7, The left and right tension adjusting roll operating devices 8 and 8 and the downstream reference roll 5 are attached to the fixed frames 11 and 11, and the coating means 39 having the coating roll 6 is attached to the elevating frame. When passing through the substrate running path R, the coating means 39 may be lowered to stand by.

  The present coating method for performing intermittent coating by running a substrate W (for example, a substrate having a thickness of 10 to 30 μm) on the substrate running path R of the coating apparatus 1 of the present invention is the fixed position shown in FIG. The upstream reference roll 2, the advance / retreat coating switching roll 3, the forward / backward tension adjustment roll 4 and the downstream reference roll 5 at a fixed position are set while supporting and guiding the non-coating surface Wb of the substrate W. The base material W is run in a reference tension state where tension is applied, and the base material is moved to the base material by the coating changeover roll operating devices 7 and 7 shown in FIG. The W is advanced from the non-coating operation position D to the coating operation position E from the non-coating surface Wb side to the coating surface Wa side, and the tension adjusting roll 4 is used as the base material by the tension adjusting roll operating devices 8 and 8. From non-coating operation position F to coating operation position G from W coating surface Wa side to non-coating surface Wb side The coating on the outer peripheral surface 6a of the rotating coating roll 6 is moved backward and provided at a fixed position between the upstream reference roll 2 and the coating switching roll 3 and on the coating surface Wa side of the substrate W. A coating time zone (see FIG. 6) for performing a coating operation in which the coating surface Wa of the substrate W is brought into contact with the working liquid to form a coating area K (see FIG. 7B), and while the substrate is running 4A, the coating switching roll 3 shown in FIG. 4A is retracted from the coating operation position E to the non-coating operation position D and the tension adjusting roll 4 is moved from the coating operation position G to the non-coating operation position F. A non-coating operation is performed in which the coating surface Wa of the base material W is separated from the coating liquid on the outer peripheral surface of the coating roll 6 to form a non-coating area J (see FIG. 7B). By alternately repeating the non-coating time zone (see FIG. 6), the coating area K and the non-coating area J shown in FIG. 7B are alternately formed on the coating surface Wa of the substrate W. To do.

  The coating method of the present invention is performed by the above-described specific control of the control device 9 for the coating switching roll operating devices 7 and 7 and the tension adjusting roll operating devices 8 and 8 of the coating device 1 of the present invention. As shown in FIG. 4, the set time T1 before and after the start of contact of the coating surface Wa of the substrate W with the coating liquid on the outer peripheral surface 6a of the coating roll 6 and the coating on the outer peripheral surface 6a of the coating roll 6 Within each set time T2 before and after starting to separate the coating surface Wa of the substrate W from the liquid, the tension of the substrate W is increased above the reference tension value other than these set times T1 and T2, By reducing the amount of bending of the material W in the width direction (direction perpendicular to the traveling direction), the time difference at which contact between the both ends in the width direction of the substrate W and the center portion with respect to the coating liquid on the coating roll 6 starts. Alternatively, reduce the time difference at which separation starts and apply the coating area K. It can be brought close to a straight line without being bent largely for beginning and end. The coating method of the present invention is based on the coating liquid on the outer peripheral surface 6a of the coating roll 6 in a state where the tension of the substrate W is set to the reference tension value in the time zone excluding the set times T1 and T2 in the coating time zone. The entire left and right widths of the coating surface Wa of the material W are brought into contact with each other, and the coating operation is performed with the amount of bending in the width direction (direction perpendicular to the traveling direction) of the substrate W being zero.

  The coating apparatus 1 and the coating method of the present invention are set before and after starting the contact of the coating surface Wa of the substrate W with the coating liquid on the outer peripheral surface of the coating roll 6 in the coating operation. Each of time T1 (refer FIG. 6) and set time T2 set before and after starting separation of the coating surface Wa of the base material W with respect to the coating liquid on the outer peripheral surface of the coating roll 6 in non-coating operation. By increasing the tension value of the base material W in time over the tension values at times other than these set times, compared to the case where the tension applied to the conventional base material is always constant, the beginning of the coating area K And it can be approximated to a straight line without greatly bending the end.

  Since the conventional intermittent coating apparatus uses an air cylinder for the movement control of the working roll, it takes time from the start of the movement of the working roll to the detection of the air pressure of the air cylinder corresponding to the tension applied to the substrate. In addition, there is a limit to increasing the response speed of the air cylinder using compressed air. For this reason, the conventional intermittent coating apparatus cannot follow the control of the air cylinder and cannot achieve the purpose even if it is attempted to speed up the cycle of the base material and the forward / backward movement of the working roll for the purpose of improving productivity. On the other hand, the coating apparatus 1 of the present invention is an electric servo motor capable of positioning control and speed control as a drive source 27 to the coating switching roll operating devices 7 and 7 and the tension adjusting roll operating devices 8 and 8. , The coating switching roll 3 and the tension adjusting roll 4 can be moved back and forth as much as possible to stop at the correct coating operation position. In addition, it is possible to dramatically improve the productivity as compared with the prior art by shortening the forward / backward cycle of the tension adjusting roll 4.

  Furthermore, the coating apparatus 1 and the coating method of the present invention increase the tension value of the base material W so that the coating area K (see FIG. 7 (B)) is linearly curved without being greatly curved at the start and end of the coating area K (see FIG. 7B). Therefore, it is possible to apply intermittent coating to the base material W having a large width dimension of about 1000 mm that is easily bent in the width direction, and the base material width dimension cannot be 500 mm or more. Compared with this, productivity can be dramatically improved.

2 ... upstream reference roll, 3 ... coating switching roll, 4 ... tension adjusting roll, 5 ... downstream reference roll, 6 ... coating roll, 7 ... operating device for coating switching roll, 8 ... tension adjustment Operation device for rolls, 9 ... control device, 10 ... connecting frame, 11 ... fixed frame, 12 ... elevating guide device, 13 ... elevating frame, 17 ... guide rail, 18 ... slider, 19 ... moving operation tool, 21 ... guide Roll, 22 ... Guide roll, 24 ... Guide rail, 25 ... Slider, 26 ... Roll support, 27 ... Drive source, 27a ... Output shaft, 28 ... Power transmission mechanism, 31 ... Crank, 32 ... Connecting rod, 34 ... Drive 35: coating liquid adhesion tank, 36: lifting device, 37 ... doctor, 38 ... doctor movement device, 39 ... coating means, D ... non-coating operation position (coating switching roll 3), E ... coating Work operation position (coating cut Roll 3), F ... non-coating operation position (tension adjustment roll 4), G ... coating operation position (tension adjustment roll 4), K ... coating area, J ... non-coating area, M ... standby Position, N ... Coating operation position, PL ... Substrate pass line, R ... Substrate traveling path, Ra ... Coating surface, Rb ... Non-coating surface, S ... Base material traveling direction, T1 ... Set time (of coating surface Wa) Before and after the moment when contact or coating approach is started), T2 ... set time (before and after the start of separation of the coated surface Wa), W ... substrate, Wa ... coated surface, Wb ... non-coated surface

Claims (2)

Non-coating of the base material by the upstream reference roll at a fixed position, the coating switching roll that can be moved forward and backward, the tension adjustment roll that can be moved forward and backward, and the downstream reference roll at a fixed position that are provided in order in the substrate running direction. Run the substrate with tension applied while supporting and guiding the work surface,
While the substrate is running, the coating switching roll is advanced from the non-coating operation position to the coating operation position from the non-coating surface side of the substrate to the coating operation side, and the tension adjusting roll is moved to the coating surface of the substrate. Retreat from the non-coating operation position to the coating operation position from the side toward the non-coating surface side, and between the upstream reference roll and the coating switching roll, at a fixed position on the coating surface side of the substrate The coating operation for forming the coating area by bringing the coating surface of the substrate into contact with the coating liquid on the outer peripheral surface of the rotating coating roll provided, and the coating switching roll is applied while the substrate is running. Retract from the coating operation position to the non-coating operation position and advance the tension adjustment roll from the coating operation position to the non-coating operation position to apply the substrate coating surface from the coating liquid on the outer peripheral surface of the coating roll. In the intermittent coating method of alternately repeating the non-coating operation to form a non-coating area by separating the
The set time set before and after starting the contact of the coated surface of the substrate with the coating liquid on the outer circumferential surface of the coating roll in the coating operation, and the coating on the outer circumferential surface of the coating roll in the non-coating operation Change the coating so that the tension value of the base material within each set time set before and after starting the separation of the coated surface of the base material with respect to the working fluid will be greater than the tension value outside these set times. An intermittent coating method characterized by controlling the advance / retreat position of the tension adjusting roll following the advance / retreat movement of the roll. A fixed upstream reference roll provided in order toward the base material traveling direction so as to form the non-coating surface side of the base material travel path, a coating switching roll that can be moved forward and backward, and a tension adjustment roll that is movable forward and backward And a downstream reference roll at a fixed position;
A coating roll provided at a fixed position on the coating surface side of the substrate traveling path between the upstream reference roll and the coating switching roll;
A coating switching roll that advances and retreats the coating switching roll from the non-coating operation position to the coating operation position from the non-coating surface side to the coating surface side of the substrate traveling path, and advances in the opposite direction therebetween. Operating device;
Operation for tension adjustment roll that retracts the tension adjustment roll from the non-coating operation position to the coating operation position from the coating surface side to the non-coating surface side of the substrate traveling path and advances in the opposite direction Equipment,
Coating operation and coating in which the coating switching roll operating device and the tension adjusting roll operating device are controlled to bring the coating surface side of the substrate running path into contact with or close to the coating roller outer peripheral surface. A control device that repeats a non-coating operation for separating the coating surface side of the substrate running path from the outer peripheral surface of the roll, and an intermittent coating device comprising:
The control device is configured such that the dimension value of the substrate pass line from the upstream reference roll to the downstream reference roll of the substrate traveling path is on the coating surface side of the substrate traveling path with respect to the outer peripheral surface of the coating roll in the coating operation. Setting time set before and after starting contact or coating approach, and setting set before and after starting separation of the coated surface side of the substrate running path from the outer peripheral surface of the coating roll in non-coating operation The advance / retreat position of the tension adjusting roll is controlled so as to follow the advance / retreat movement of the coating switching roll so that the dimension value in each time of the time becomes larger than the dimension values other than the set time. Features intermittent coating equipment.

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