JP2018158326A - Coating device and coating method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a technology for effectively insulating an end in a conveyance direction of electrode layers which are intermittently formed.SOLUTION: A coating device includes: a detection section (16) which detects a layer end (8b) that is an end of an electrode unit pattern in a conveyance direction; and a control section (22) which controls operation of a nozzle (14) and a movement part (18) based on a timing detected by a layer end. The control section performs coating gap control which controls operation of a movement part so that coating gaps (G) in a region where an electrode layer (8a) is not formed and a region where the electrode layer is formed on the surface of a base material (5) become equal. The control section controls operation of a nozzle so that a coating material is coated astride the layer end of the electrode layer.SELECTED DRAWING: Figure 7

Description

  The present invention relates to a coating apparatus and a coating method for coating a coating material on the surface of a substrate to be conveyed.

  Conventionally, a coating method has been known in which an electrode layer is intermittently applied to the surface of a substrate conveyed by a backup roller or the like.

  For example, in Patent Document 1, the electrode layer is intermittently applied in the transport direction by intermittently stopping the discharge of the coating material by a suck back mechanism that periodically forms the drawing material drawing space. A coating apparatus is disclosed.

JP-A-2006-185504

  When it is necessary to insulate the end part in the conveyance direction of the electrode layer formed intermittently, the insulating tape was affixed to the said end part manually. However, the operation is laborious and it is difficult to maintain the accuracy of the position where the insulating tape is attached.

  The present invention has been made to solve the problems described above, and provides a technique for effectively insulating the end portions of the intermittently formed electrode layers in the transport direction. It is intended.

  The first aspect of the technology disclosed in the specification of the present application is to support a base material having an electrode layer on the surface of which a plurality of electrode unit patterns are intermittently formed in the transport direction from the back surface of the base material, and A roller that transports the base material; and a discharge port that discharges a coating material that is an insulating material; and the coating material that is discharged from the discharge port to the base material that is transported by the roller. The layer edge which is the edge part of each said electrode unit pattern in the said conveyance direction in the position upstream of the said conveyance direction rather than the said nozzle of the surface to which the nozzle to coat and the said roller is supported A detecting unit for detecting a part, a moving unit for moving the nozzle in a direction approaching or leaving the roller, and an upstream of the nozzle in the transport direction, and reducing the external space of the nozzle. Reduction And a control unit that controls the operation of the nozzle and the moving unit based on the timing at which the layer end is detected by the detection unit, and is located upstream of the ejection direction of the discharge port The first end protrudes in a direction closer to the roller than the second end located downstream in the transport direction of the discharge port, and the control material is coated with the coating material. The coating gap, which is the distance between the coating surface and the nozzle, is equal between the region where the electrode layer is not formed and the region where the electrode layer is formed on the surface of the substrate. A coating gap control is performed to control the operation of the moving unit, and the control unit controls the operation of the nozzle so that the coating material is applied across the layer end of the electrode layer.

  A second aspect of the technique disclosed in the specification of the present application relates to the first aspect, and the discharge port is located downstream of the transport direction with respect to a normal direction of the roller toward the discharge port. Inclined.

  A third aspect of the technology disclosed in the specification of the present application is related to the first aspect or the second aspect, wherein the detection unit is a distance sensor positioned to face the coating surface, and the detection unit Detects the layer end based on the distance between the detection unit and the coating surface, and the control unit detects the coating based on the distance between the detection unit and the coating surface. Perform gap control.

  According to a fourth aspect of the technology disclosed in the specification of the present application, a substrate having an electrode layer on which a plurality of electrode unit patterns are intermittently formed in the transport direction is supported from the back surface of the substrate, and A roller that transports the base material; and a discharge port that discharges a coating material that is an insulating material; and the coating material that is discharged from the discharge port to the base material that is transported by the roller. It is a coating method in which the coating material is applied using a coating apparatus comprising a coating nozzle and a moving unit that moves the nozzle in a direction to approach or leave the roller, and the discharge port The first end located upstream in the transport direction protrudes in a direction closer to the roller than the second end located downstream in the transport direction of the discharge port, and The nozzle of the surface of the substrate to be supported In addition, at the upstream position in the transport direction, the layer end that is the end of each electrode unit pattern in the transport direction is detected, the external space of the nozzle is decompressed, and the layer end is detected. Based on the timing, the coating gap, which is the distance between the coating surface on which the coating material is applied and the nozzle, has a region where the electrode layer is not formed on the surface of the substrate and the electrode layer. The coating gap is controlled to control the operation of the moving part so as to be equal to the formed region, and based on the timing at which the layer end is detected, the coating material is the electrode layer The operation of the nozzle is controlled so as to be applied across the layer end.

  According to the first and fourth aspects of the technology disclosed in the specification of the present application, based on the timing when the layer end of the electrode layer is detected by the detection unit, the coating material that is an insulating material is the layer end. It discharges so that it may straddle. Therefore, the layer edge part of the electrode layer formed intermittently can be insulated effectively. Further, since the nozzle moves between the region where the electrode layer is formed and the region where the electrode layer is not formed so that the coating gap is equal, the degree of uniformity of the thickness of the coated layer is increased.

  In particular, according to the second aspect, the opening surface of the discharge port of the nozzle is arranged along the curved surface of the roller. Therefore, compared with the case where the axial direction of the nozzle is in the posture along the normal direction of the roller, a bead (liquid pool) formation region in the transport direction is widened, and the bead is stabilized.

  In particular, according to the third aspect, in addition to the control of the operation timing of the nozzle and the moving unit based on the timing at which the layer end is detected by the detection unit, the control unit is provided between the detection unit and the coating surface. Coating gap control based on distance can be performed.

  The objectives, features, aspects, and advantages of the technology disclosed in this specification will become more apparent from the detailed description and the accompanying drawings provided below.

It is a figure which illustrates roughly the composition of the coating system about an embodiment. It is a figure which illustrates roughly the composition of the coating device about an embodiment. It is an expanded sectional view which illustrates the structure of the discharge outlet in a nozzle. It is an expanded sectional view which illustrates the modification of the discharge outlet in a nozzle. It is a top view which illustrates arrangement | positioning of the electrode layer and coating layer in the surface of a base material. It is a side view which illustrates arrangement of an electrode layer and a coating layer in the surface of a substrate. It is a side view for demonstrating coating gap control. It is a flowchart which illustrates operation | movement of the coating apparatus regarding embodiment.

  Embodiments will be described below with reference to the accompanying drawings.

  Note that the drawings are schematically shown, and the configuration is omitted or simplified as appropriate for the convenience of explanation. In addition, the mutual relationships between the sizes and positions of the configurations and the like shown in different drawings are not necessarily accurately described and can be changed as appropriate.

  Moreover, in the description shown below, the same code | symbol is attached | subjected and shown in the same component, and it is the same also about those names and functions. Therefore, detailed descriptions thereof may be omitted to avoid duplication.

  In the description described below, a specific position and direction such as “top”, “bottom”, “left”, “right”, “side”, “bottom”, “front” or “back” Even if the meaning terms are used, these terms are used for convenience to facilitate understanding of the contents of the embodiment, and have no relation to the direction in actual implementation. It is something that does not.

  In addition, in the description described below, even if an ordinal number such as “first” or “second” is used, these terms mean that the contents of the embodiment are understood. It is used for the sake of convenience, and is not limited to the order that can be generated by these ordinal numbers.

<Embodiment>
Hereinafter, the coating apparatus and the coating method regarding this Embodiment are demonstrated.

<Overall configuration of coating system>
FIG. 1 is a diagram schematically illustrating a configuration of a coating system according to the present embodiment. In the coating system illustrated in FIG. 1, an end in the transport direction of an electrode layer made of an electrode material in which a plurality of electrode layers are intermittently formed in the transport direction on the surface of a metal foil as a substrate, that is, a layer end A coating material that is an insulating material is applied, that is, applied so as to straddle the part. And a drying process is performed with respect to a base material.

  As illustrated in FIG. 1, the coating system 1 includes a coating apparatus 10, a drying unit 70, and a transport mechanism 80.

  The transport mechanism 80 includes an unwinding roller 81, a winding roller 82, and a plurality of auxiliary rollers 83. Note that the number and arrangement position of the auxiliary rollers 83 are not limited to the example of FIG. 1 and can be increased or decreased as necessary.

  The base material 5 conveyed in the coating system 1 is, for example, an aluminum foil (Al) or a copper foil (Cu). The base material 5 is a long sheet-like metal foil, and can have a width of 600 mm to 700 mm and a thickness of 10 μm to 20 μm, for example. A plurality of electrode layers are intermittently formed on the surface of the substrate 5 in the longitudinal direction. This electrode layer is formed by another coating system, for example, by intermittently applying a coating material containing an active material, which is an electrode material of a lithium ion secondary battery, to the substrate 5 and then drying it. The

  The base material 5 on which the plurality of electrode layers are formed is fed from the unwinding roller 81 and wound by the winding roller 82, so that the coating apparatus 10 and the drying unit 70 are conveyed in this order. The drying unit 70 performs a drying process on the coating material coated on the substrate 5 or the like.

<Coating device>
FIG. 2 is a diagram schematically illustrating the configuration of the coating apparatus 10 according to the present embodiment. The coating apparatus 10 applies the coating material 7 which is an insulating material on the surface of the base material 5 in a state where the plurality of electrode layers 8a are intermittently formed. The coating material 7 is assumed to be a liquid, paste, or slurry insulating material.

  As illustrated in FIG. 2, the coating apparatus 10 includes a backup roller 12, a nozzle 14, a detection unit 16, a nozzle stage 18, a decompression unit 20, a supply mechanism 100 a, and a control unit 22. .

  The supply mechanism 100 a includes a supply tank 21, a pump 31, a supply valve 32, a supply pipe 30, and a syringe 36.

  The backup roller 12 supports the base material 5 having the electrode layer 8 a on the surface from the back surface of the base material 5. Then, the backup roller 12 conveys the base material 5.

  The nozzle 14 has a discharge port 14 a for discharging the coating material 7. The discharge port 14 a has a slit shape along the width direction of the substrate 5. The discharge port 14 a of the nozzle 14 is disposed to face the surface of the substrate 5. Then, the nozzle 14 applies the coating material 7 discharged from the discharge port 14 a to the surface of the substrate 5 conveyed by the backup roller 12. By doing so, the coating layer 7 a is formed on the surface of the substrate 5. The operation of the nozzle 14 is controlled by the control unit 22. A specific configuration of the nozzle 14 will be described later.

  The detection unit 16 has upstream and downstream ends in the transport direction of the formed electrode layer 8a at a position upstream of the nozzle 14 in the transport direction on the surface of the substrate 5 supported by the backup roller 12. Detect. Here, the end of each electrode layer 8a in the transport direction, that is, the end of the electrode unit pattern in the transport direction is referred to as a layer end 8b.

  The detection unit 16 is a distance sensor such as an infrared ray or an ultrasonic method. In this case, the detection unit 16 is disposed to face the base material 5 or the electrode layer 8a supported by the backup roller 12, and the distance from the detection unit 16 to the surface of the electrode layer 8a and the detection unit 16 to the electrode layer are arranged. Based on the difference from the distance to the surface of the substrate 5 in the region where 8a is not formed, the layer end 8b can be detected. The detection result in the detection unit 16 is transmitted to the control unit 22. The detection unit 16 is not limited to such a distance sensor, and detects the layer end 8b based on the difference between the luminance of the substrate 5 and the luminance of the electrode layer 8a by, for example, image analysis. You may do.

  The nozzle stage 18 is, for example, a linear stage. The nozzle stage 18 is attached to the nozzle 14 and moves the nozzle 14 toward or away from the backup roller 12. The operation of the nozzle stage 18 is controlled by the control unit 22.

  The decompression unit 20 is located adjacent to the discharge port 14a of the nozzle 14 upstream of the nozzle 14 in the transport direction. The decompression unit 20 decompresses the external space of the nozzle 14.

  A hollow chamber chamber 20 a is provided inside the decompression unit 20. The decompression unit 20 is provided independently of the nozzle 14.

  The supply tank 21 stores the coating material 7 in a liquid state, for example. The pump 31 pressure-feeds the coating material 7 supplied from the supply tank 21 toward the nozzle 14 via the supply pipe 30. The operation of the pump 31 is controlled by the control unit 22.

  The supply valve 32 repeatedly opens and closes the flow path of the supply pipe 30. The supply valve 32 switches the supply and stop of the coating material 7 to the nozzle 14, whereby the coating material 7 is intermittently applied on the surface of the substrate 5. The operation of the supply valve 32 is controlled by the control unit 22.

  The syringe 36 draws the coating material 7 from the supply pipe 30 when the supply valve 32 is closed. Thereby, the discharge of the coating material 7 from the nozzle 14 can be stopped quickly. The operation of the syringe 36 is controlled by the control unit 22.

<Configuration of nozzle>
FIG. 3 is an enlarged cross-sectional view illustrating the structure of the discharge port 14 a in the nozzle 14. In FIG. 3, the normal line 12a of the backup roller 12 toward the discharge port 14a is indicated by a dotted line. In FIG. 3, for the sake of simplicity, the decompression unit 20 and the detection unit 16 are not shown.

  As illustrated in FIG. 3, the discharge port 14 a is configured such that the end portion 140 positioned on the upstream side in the transport direction of the backup roller 12 is backed up more than the end portion 141 positioned on the downstream side in the transport direction of the backup roller 12. It is formed to protrude in a direction approaching the roller 12.

  The distance X at which the end 140 protrudes in a direction closer to the backup roller 12 than the end 141 is, for example, 100 μm.

  Since the end of the discharge port 14a has such a configuration, when the coating material 7 is applied to the surface of the substrate 5, air is applied to the coating material 7 from the upstream side in the transport direction of the backup roller 12. It becomes difficult to get involved. Therefore, since the scale (portion where the thickness is reduced) caused by the air being caught in the coating material 7 is less likely to occur, the uniformity of the thickness of the coating layer 7a to be coated is improved.

  FIG. 4 is an enlarged cross-sectional view illustrating a modified example of the discharge port 14 a in the nozzle 14. In FIG. 4, the normal line 12a of the backup roller 12 toward the discharge port 14a is indicated by a dotted line. In FIG. 4, for the sake of simplicity, the decompression unit 20 and the detection unit 16 are not shown.

  As illustrated in FIG. 4, when the discharge port 14 a of the nozzle 14 is disposed to be inclined downstream with respect to the base material 5 supported by the backup roller 12, that is, the normal line 12 a of the backup roller 12 is set. In the case of being arranged to be inclined to the downstream side in the transport direction as a reference, the distance between the end portion 141 located on the downstream side and the surface of the base material 5 is closer than in the case of the arrangement illustrated in FIG.

  In such a case, since the opening surface of the discharge port 14a of the nozzle 14 is arranged along the curved surface of the backup roller 12, the formation region of the beads 7b (liquid pool) of the coating material 7 discharged from the discharge port 14a. However, it spreads more downstream in the transport direction than in the arrangement illustrated in FIG. If it does so, since the bead 7b will become easy to stabilize, the uniformity of the thickness of the coating layer 7a to be coated will improve.

<Operation of coating device>
Next, the operation of the coating apparatus according to the present embodiment will be described with reference to FIGS. FIG. 8 is a flowchart illustrating the operation of the coating apparatus according to this embodiment.

  First, the arrangement of the electrode layer 8a and the coating layer 7a formed on the substrate 5 will be described. FIG. 5 is a plan view illustrating the arrangement of the electrode layer 8 a and the coating layer 7 a on the surface of the substrate 5. In FIG. 5, the conveyance direction of the base material 5 is indicated by an arrow. FIG. 6 is a side view illustrating the arrangement of the electrode layer 8 a and the coating layer 7 a on the surface of the substrate 5. Also in FIG. 6, the conveyance direction of the base material 5 is shown by the arrow.

  As illustrated in FIGS. 5 and 6, a plurality of electrode layers 8 a are intermittently formed in the conveyance direction of the base material 5. That is, the plurality of electrode layers 8 a are a plurality of electrode unit patterns that are separated from each other in the conveyance direction of the base material 5.

  Moreover, as illustrated in FIGS. 5 and 6, the coating layer 7 a is formed across the layer end portion 8 b that is an end portion in the transport direction of the electrode layer 8 a.

  Further, as illustrated in FIG. 6, since the electrode layer 8 a has a predetermined thickness, the height of the surface of the coating layer 7 a formed across the layer end portion 8 b covers the surface of the substrate 5. The portion covering the surface of the electrode layer 8a is higher than the portion.

  Next, the process of forming the electrode layer 8a and the coating layer 7a arranged as described above will be described.

  First, in the coating apparatus 10, the coating material 7 is applied to the surface of the substrate 5. And the coating layer 7a is intermittently formed in the conveyance direction of the base material 5 on the surface of the base material 5. FIG.

  Specifically, first, the layer end 8b of the electrode layer 8a is detected by the detection unit 16 (step ST101). The control unit 22 controls operations of the nozzle 14, the nozzle stage 18, the pump 31, the supply valve 32, and the syringe 36 in accordance with the timing when the detection unit 16 detects the layer end 8b (see FIG. 2). .

  In other words, the control unit 22 determines whether the layer end 8b detected by the detection unit 16 is transported to a position close to the discharge port 14a of the nozzle 14, that is, across the time before and after the coating timing. The coating material 7 is discharged from the 14 discharge ports 14a (step ST102). Specifically, the control unit 22 opens the flow path of the supply pipe 30 across the supply valve 32 before and after the coating timing, and the coating material 7 pumped by the pump 31 in accordance with the opening. Is supplied to the nozzle 14. The supply pipe 30 is opened by the supply valve 32 from a predetermined time before the coating timing to after a predetermined time, and when the supply valve 32 is closed, the syringe 36 draws the coating material 7. .

  At the same time, the control unit 22 controls the operation of the nozzle stage 18 so that the distance between the coating surface on which the coating material 7 is applied and the nozzle 14 across the time before and after the coating timing, Precisely, the coating gap, which is the distance between the coating surface and the end portion 140, is equal between the region where the electrode layer 8a is not formed on the surface of the substrate 5 and the region where the electrode layer 8a is formed. Thus, the coating gap control is performed (step ST102). Here, the coated surface refers to the surface on which the coating material 7 is to be coated, that is, in the state where the electrode layer 8a is formed on the surface of the substrate 5, and the surface and the base of the electrode layer 8a. The surface where the coating material 7 is scheduled to be coated among the surfaces of the material 5 is pointed out.

  FIG. 7 is a side view for explaining the coating gap control. As illustrated in FIG. 7, when the control unit 22 controls the nozzle stage 18, the nozzle 14 moves before and after the coating timing T, and the coating gap G becomes equal. The moving range of the nozzle 14 by the nozzle stage 18 is, for example, 200 μm at the maximum. The coating gap G is, for example, 30 μm, and the nozzle 14 is moved so that the distance is maintained.

  Here, the movement position of the nozzle 14 before and after the coating timing T may be a predetermined position in consideration of the assumed thickness of the electrode layer 8a, or may be detected by the detection unit 16. Alternatively, the position may be determined based on the distance from the detection unit 16 to the coating surface.

  That is, when the movement position of the nozzle 14 is a predetermined position, for example, a position of 30 μm from the surface of the substrate 5 becomes the movement position of the nozzle 14 in the region where the electrode layer 8a is not formed. In the region where the electrode layer 8a is formed, the position where the nozzle 14 is moved is, for example, 30 μm from the surface of the substrate 5 plus an amount assumed as the thickness of the electrode layer 8a.

  On the other hand, when the movement position of the nozzle 14 is a position determined based on the distance from the detection unit 16 to the coating surface, in the region where the electrode layer 8a is not formed, from the surface of the substrate 5, for example, , The position of 30 μm is the movement position of the nozzle 14, and in the region where the electrode layer 8 a is formed, the distance from the detection unit 16 to the coating surface detected by the detection unit 16 before and after the coating timing T is as follows. A position where the nozzle 14 moves away from the substrate 5 by a distance corresponding to the difference is a moving position of the nozzle 14.

  At least at the timing when the coating material 7 is discharged from the discharge port 14a, the external space of the nozzle 14 (for example, a predetermined region centered on the discharge port 14a) is reduced by the pressure reducing unit 20.

  By such an operation, the coating layer 7a is formed across the layer end portion 8b of the electrode layer 8a on the surface of the substrate 5 (step ST103).

<About the effects produced by the embodiment described above>
Next, effects produced by the embodiment described above will be exemplified. In the following description, the effect is described based on the specific configuration exemplified in the above-described embodiment, but is exemplified in the present specification within a range in which the same effect occurs. Other specific configurations may be substituted.

  According to the embodiment described above, the coating apparatus includes the roller, the nozzle 14, the detection unit 16, the moving unit, the decompression unit 20, and the control unit 22. Here, the roller corresponds to, for example, the backup roller 12. The moving unit corresponds to, for example, the nozzle stage 18.

  The backup roller 12 supports, from the back surface of the base material 5, the base material 5 having the electrode layer 8 a on which the plurality of electrode unit patterns are intermittently formed in the transport direction, and transports the base material 5. The nozzle 14 has a discharge port 14a for discharging the coating material 7 that is an insulating material. Further, the nozzle 14 applies the coating material 7 discharged from the discharge port 14 a to the base material 5 conveyed by the backup roller 12. The detection unit 16 detects a layer end 8b that is an end of each electrode unit pattern in the transport direction at a position upstream of the nozzle 14 in the transport direction on the surface of the base material 5 supported by the backup roller 12. To do. The nozzle stage 18 moves the nozzle 14 toward or away from the backup roller 12. The decompression unit 20 is located upstream of the nozzle 14 in the transport direction. The decompression unit 20 decompresses the external space of the nozzle 14. The control unit 22 controls the operation of the nozzle 14 and the nozzle stage 18 based on the timing at which the layer end 8b is detected by the detection unit 16.

  Here, the first end of the discharge port 14a positioned upstream in the transport direction is closer to the backup roller 12 than the second end of the discharge port 14a positioned downstream of the transport direction. Protruding. The first end corresponds to the end 140, for example. The second end corresponds to the end 141, for example.

  The control unit 22 has a coating gap G, which is a distance between the coating surface on which the coating material 7 is applied and the nozzle 14, and a region where the electrode layer 8 a is not formed on the surface of the substrate 5 and the electrode layer 8 a. Coating gap control is performed to control the operation of the nozzle stage 18 so as to be equal to the formed area. Moreover, the control part 22 controls operation | movement of the nozzle 14 so that the coating material 7 may be applied straddling the layer edge part 8b of the electrode layer 8a.

  According to such a configuration, the coating material 7 which is an insulating material is discharged so as to straddle the layer end portion 8b based on the timing at which the detection portion 16 detects the layer end portion 8b of the electrode layer 8a. Therefore, the layer end portion 8b of the electrode layer 8a formed intermittently can be effectively insulated. Further, since the nozzle 14 moves so that the coating gap G becomes equal between the region where the electrode layer 8a is formed and the region where the electrode layer 8a is not formed, the degree of uniformity of the thickness of the coated coating layer 7a is increased. Increase. Further, since the end portion 140 of the discharge port 14a protrudes from the end portion 141, and further, the external space of the discharge port 14a of the nozzle 14 is decompressed on the upstream side in the transport direction, so that the discharge from the discharge port 14a is performed. It is possible to prevent air from entering the applied coating material 7 from upstream in the transport direction. Therefore, the bead 7b is stabilized.

  Other configurations exemplified in the present specification other than these configurations can be omitted as appropriate. That is, if at least these configurations are provided, the effects described above can be produced.

  However, when at least one of the other configurations exemplified in the present specification is appropriately added to the configuration described above, that is, the configuration described above is not exemplified as the configuration described above. Even when other configurations described above are added to the configurations described above, the effects described above can be similarly produced.

  Further, according to the embodiment described above, the discharge port 14a is inclined and arranged on the downstream side in the transport direction with respect to the normal line 12a of the backup roller 12 toward the discharge port 14a. According to such a configuration, the opening surface of the discharge port 14 a of the nozzle 14 is arranged along the curved surface of the backup roller 12. Therefore, compared with the case where the axial direction of the nozzle 14 is in a posture along the direction of the normal line 12a of the backup roller 12, the formation region of the beads 7b in the transport direction is expanded, and the beads 7b are stabilized.

  Moreover, according to embodiment described above, the detection part 16 is a distance sensor located facing a coating surface. And the detection part 16 detects the layer edge part 8b based on the distance between the detection part 16 and a coating surface. Moreover, the control part 22 performs coating gap control based on the distance between the detection part 16 and a coating surface. According to such a configuration, in addition to the control of the operation timing of the nozzle 14 and the nozzle stage 18 based on the timing at which the layer end portion 8b is detected by the detection unit 16, the control unit 22 and the coating surface Coating gap control based on the distance between the two can be performed.

  According to the embodiment described above, in the coating method, each electrode unit in the transport direction at the position upstream of the nozzle 14 in the transport direction on the surface of the substrate 5 supported by the backup roller 12. The layer end 8b, which is the end of the pattern, is detected. Then, the pressure in the external space of the nozzle 14 is reduced. Then, based on the timing at which the layer end portion 8 b is detected, the coating gap G, which is the distance between the coating surface on which the coating material 7 is coated and the nozzle 14, is the electrode layer on the surface of the base material 5. Coating gap control for controlling the operation of the nozzle stage 18 is performed so that the region where the electrode layer 8a is not formed is equal to the region where the electrode layer 8a is formed. Then, based on the timing at which the layer end portion 8b is detected, the operation of the nozzle 14 is controlled so that the coating material 7 is applied across the layer end portion 8b of the electrode layer 8a.

  According to such a configuration, the coating material 7 which is an insulating material is discharged so as to straddle the layer end portion 8b based on the timing at which the detection portion 16 detects the layer end portion 8b of the electrode layer 8a. Therefore, the layer end portion 8b of the electrode layer 8a formed intermittently can be effectively insulated. Further, since the nozzle 14 moves so that the coating gap G becomes equal between the region where the electrode layer 8a is formed and the region where the electrode layer 8a is not formed, the degree of uniformity of the thickness of the coated coating layer 7a is increased. Increase.

  Other configurations exemplified in the present specification other than these configurations can be omitted as appropriate. That is, if at least these configurations are provided, the effects described above can be produced.

  However, when at least one of the other configurations exemplified in the present specification is appropriately added to the configuration described above, that is, the configuration described above is not exemplified as the configuration described above. Even when other configurations described above are added to the configurations described above, the effects described above can be similarly produced.

  Moreover, when there is no special restriction | limiting, the order in which each process is performed can be changed.

<Modifications in Embodiments Described above>
In the embodiment described above, the material, material, dimension, shape, relative arrangement relationship, or implementation condition of each component may be described, but these are examples in all aspects. Thus, it is not limited to those described in this specification.

  Accordingly, countless variations and equivalents not illustrated are envisioned within the scope of the technology disclosed in this specification. For example, the case where at least one component is modified, the case where it is added, or the case where it is omitted are included.

DESCRIPTION OF SYMBOLS 1 Coating system 5 Base material 7 Coating material 7a Coating layer 7b Bead 8a Electrode layer 8b Layer edge part 10 Coating apparatus 12 Backup roller 12a Normal line 14 Nozzle 14a Discharge port 16 Detection part 18 Nozzle stage 20 Decompression part 20a Chamber Chamber 21 Supply tank 22 Control part 30 Supply piping 31 Pump 32 Supply valve 36 Syringe 70 Drying part 80 Conveyance mechanism 81 Unwinding roller 82 Winding roller 83 Auxiliary roller 100a Supply mechanism 140,141 End part G Coating gap T Coating timing X distance

Claims (4)

A roller that supports a substrate having an electrode layer formed intermittently in the conveyance direction on the surface thereof from the back surface of the substrate, and a roller that conveys the substrate;
A nozzle that has a discharge port that discharges a coating material that is an insulating material, and that applies the coating material discharged from the discharge port to the substrate transported by the roller;
A detection unit that detects a layer end portion that is an end portion of each electrode unit pattern in the transport direction at a position upstream of the nozzle in the transport direction on the surface of the base material supported by the roller. When,
A moving unit that moves the nozzle in a direction approaching or leaving the roller;
A decompression unit that is located upstream of the nozzle in the transport direction and that decompresses the external space of the nozzle;
A control unit that controls the operation of the nozzle and the moving unit based on the timing at which the layer end is detected by the detection unit;
A first end portion of the discharge port located upstream in the transport direction protrudes in a direction closer to the roller than a second end portion of the discharge port positioned downstream in the transport direction,
The control unit has a coating gap, which is a distance between a coating surface on which the coating material is coated, and the nozzle, and a region where the electrode layer is not formed on the surface of the substrate and the electrode layer The coating gap control is performed to control the operation of the moving unit so as to be equal to the formed region,
The control unit controls the operation of the nozzle so that the coating material is applied across the layer end of the electrode layer.
Coating equipment. The discharge port is disposed to be inclined to the downstream side in the transport direction with reference to the normal direction of the roller toward the discharge port.
The coating apparatus according to claim 1. The detection unit is a distance sensor located opposite to the coating surface,
The detection unit detects the layer end based on a distance between the detection unit and the coating surface,
The control unit performs the coating gap control based on a distance between the detection unit and the coating surface.
The coating apparatus of Claim 1 or Claim 2. A roller that supports an electrode layer having a plurality of electrode unit patterns formed intermittently in the conveying direction on the surface, and a roller that conveys the substrate, and a coating that is an insulating material A nozzle for applying the coating material discharged from the discharge port to the substrate transported by the roller and having a discharge port for discharging a material; It is a coating method for applying the coating material using a coating apparatus including a moving unit that moves in a direction of detachment,
A first end portion of the discharge port located upstream in the transport direction protrudes in a direction closer to the roller than a second end portion of the discharge port positioned downstream in the transport direction,
Detecting a layer end that is an end of each electrode unit pattern in the transport direction at a position upstream of the nozzle in the transport direction on the surface of the substrate supported by the roller;
Depressurizing the external space of the nozzle,
Based on the timing at which the layer edge is detected, the coating gap, which is the distance between the coating surface on which the coating material is applied and the nozzle, is the electrode layer on the surface of the substrate. A coating gap control is performed to control the operation of the moving unit so that the region where the electrode layer is formed is not equal to the region where the electrode layer is formed,
Based on the timing at which the layer end is detected, the operation of the nozzle is controlled so that the coating material is applied across the layer end of the electrode layer.
Coating method.

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