WO2019181126A1

WO2019181126A1 - Application device

Info

Publication number: WO2019181126A1
Application number: PCT/JP2018/047460
Authority: WO
Inventors: 敦渡邉; 勝彦上田
Original assignee: 東レエンジニアリング株式会社
Priority date: 2018-03-22
Filing date: 2018-12-25
Publication date: 2019-09-26
Also published as: CN111479634A; JP6917329B2; JP2019166425A; KR102557228B1; CN111479634B; KR20200132847A

Abstract

Provided is an application device capable of applying an electrode material and an insulation material so as to be separated from each other and capable of easily adjusting the electrode material and the insulation material so as to be adjacent to each other. Specifically, this application device, for applying an electrode material and an insulation material to the surface of a base material, is provided with: a base material transport part which transports the base material at a predetermined speed in one direction; an application die in which an electrode material outlet for discharging the electrode material toward the surface of the base material and an insulation material outlet for discharging the insulation material toward the surface of the base material are disposed at a distance; an air nozzle which is disposed downstream to the application die and which blows a blast of air toward the insulation material applied to the base material; and an insulation material profile changing part which adjusts the space between an application cross-sectional shape of the insulation material and the electrode material by changing at least one of the position and the angle of the air nozzle and the flow rate and the flow velocity of the blast of air.

Description

Coating device

The present invention relates to an apparatus for applying an electrode material (so-called active material, carbon material, etc.) and an insulating material to the surface of a core material for an electrode sheet (for example, copper foil or aluminum foil) for a secondary battery.

Conventionally, in the process of manufacturing an electrode sheet such as a secondary battery, an electrode material is applied to one or both sides of a core material while unwinding and transporting a long core material (metal foil) wound around a reel. A so-called coating apparatus is used which is dried and then wound up on a reel again.

In this coating apparatus, when the electrode material is applied, an insulating material is applied to both ends thereof, and the inside of the coating die is partitioned by a separator (also referred to as separation or separation), and is disposed separately. The electrode material and the insulating material are discharged simultaneously from the electrode material discharge port and the insulating material discharge port, respectively. (For example, Patent Document 1).

JP 2001-210304 A

However, in the case of a configuration in which the electrode material and the insulating material are discharged from a discharge port separated as in Patent Document 1, if the viscosity or specific gravity of the electrode material or the insulating material changes with time, They are not adjacent to each other but are separated, overlapped, or mixed with each other.

In addition, if the viscosity and specific gravity of electrode materials and insulating materials differ greatly due to changeover, it is necessary to readjust the position of the coating die and the substrate and the discharge conditions, or the coating die cannot be shared, It was necessary to replace the coating die, resulting in an increase in stoppage time and adjustment work, resulting in a decrease in productivity.

Therefore, designing and manufacturing a common coating die that can apply different coating materials and insulating materials is difficult and impractical.

Accordingly, an object of the present invention is to provide a coating apparatus that can easily adjust the electrode material and the insulating material to be adjacent to each other or stacked while applying the electrode material and the insulating material separately.

In order to solve the above problems, an aspect of the present invention is as follows.
In a coating apparatus for applying an electrode material and an insulating material on the surface of a substrate,
A base material transport unit for transporting the base material at a predetermined speed in one direction;
An application die in which an electrode material discharge port for discharging the electrode material toward the surface of the base material and an insulating material discharge port for discharging the insulating material are disposed apart from each other;
An air nozzle disposed on the downstream side of the coating die and spraying an air jet toward the insulating material coated on the substrate;
An insulating material profile changing unit that changes at least one of the position and angle of the air nozzle and the flow rate and flow velocity of the air jet to adjust the gap between the insulating material application cross-sectional shape and the electrode material; Yes.

According to this aspect, since the electrode material discharge port and the insulating material discharge port are separated from each other, the discharged electrode material and the insulating material are not mixed. Then, the air jet flow of the air nozzle can be moved so that the highly fluid insulating material is close to the electrode material side to form a desired laminated state.

Even if the viscosity of the electrode material or insulating material applied to the base material changes over time or the flow characteristics change, such as setup change, without changing the integrated application die and application conditions to be used, While being applied separately from the insulating material, it can be easily adjusted to be adjacent or stacked. Therefore, the design and production of the nozzle becomes easy, the time required for the adjustment work is shortened, and the productivity is improved.

It is the schematic which shows the whole structure of an example of the form which embodies this invention. It is the schematic which shows the principal part of an example of the form which embodies this invention. It is the schematic which shows the principal part of the modification of the form which embodies this invention. It is the schematic which shows the principal part of another example of the form which embodies this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the drawings. In the following drawings, the three axes of the orthogonal coordinate system are X, Y, and Z, the XY plane is the horizontal plane, and the Z direction is the vertical direction. In particular, in the X direction, the direction of the arrow is expressed as the downstream side in the transport direction (also simply referred to as the downstream side), and the opposite direction is expressed as the upstream side in the transport direction (also simply referred to as the upstream side). The opposite direction is expressed as below. A direction of rotation about the Z direction is expressed as θ.

FIG. 1 is a schematic diagram showing an overall configuration of an example of a form embodying the present invention. FIG. 1 shows a schematic view of a coating apparatus 1 according to the present invention.

The coating apparatus 1 applies an electrode material and an insulating material on the surface of the substrate S. The coating apparatus 1 includes a substrate transport unit 2, a coating die 3, an insulating material coating end position detection unit 4, an air nozzle 5, and an insulating material profile changing unit 6.

The base material transport unit 2 transports the base material S in one direction (for example, the direction indicated by the arrow v) at a predetermined speed.
Specifically, the base material conveyance unit 2 includes an unillustrated unwinding device, a winding device, a backup roll 21, and the like.

The unwinding device supplies the substrate S wound in a roll while unwinding. The winding device is to wind the applied material again in a roll after drying the applied material.

The backup roll 21 applies a predetermined tension to the substrate S being transported to eliminate wrinkles and slack. Further, the backup roll 21 is for transporting the substrate S while keeping the distance from the coating die 3 constant. Specifically, the backup roll 21 is composed of a cylindrical member having a smooth surface.

The coating die 3 discharges the electrode material L1 and the insulating material L2 toward the surface of the substrate S.

The body 30 of the coating die 3 is provided with an electrode material discharge port 31 for discharging the electrode material L1, and an insulating material discharge port 32 for discharging the insulating material L2 outside the both ends. Are provided. The electrode material discharge port 31 and the insulating material discharge port 32 are spaced apart.

When the electrode material L1 and the insulating material L2 are applied to the base material S, the coating die 3 is disposed at a position indicated by a broken line 30 ′, and the tip portions of the electrode material discharge port 31 and the insulating material discharge port 32 are located at the base. The electrode material L1 and the insulating material L2 are discharged while being separated from the material S by a predetermined distance (so-called application gap).

Therefore, a gap G is generated between the electrode material L1 applied to the surface of the substrate S and the insulating material L2.

The insulating material application end position detection unit 4 is arranged on the downstream side of the application die 3 and detects end position information of the insulating material L2 applied on the substrate S.

Specifically, the insulating material application end position detection unit 4 includes the end position of the insulating material L2 in the width direction of the base material S (that is, absolute end position information), the electrode material L1, and the insulating material L2. The gap dimension (that is, relative end portion position information) of the end portion is detected.

More specifically, as the insulating material application end position detection unit 4, a strip-shaped beam LB having a predetermined length in the width direction of the base material S is irradiated obliquely with respect to the surface of the base material S and reflected. A displacement meter (so-called profiler) that measures the surface shape, level difference, etc. of the substrate S is used by measuring the position of light. At this time, the insulating material application end position detecting unit 4 is installed so that the belt-like beam LB is irradiated over the end portions of the electrode material L1 or the insulating material L2. By doing so, the absolute or relative end position information of the insulating material L2 applied on the substrate S can be detected.

The air nozzle 5 is disposed on the downstream side of the coating die 3 and blows an air jet J toward the insulating material L2 coated on the substrate S. Here, the configuration in which the air nozzle 5 is disposed on the downstream side of the insulating material application end position detection unit 4 is illustrated.

Specifically, in the air nozzle 5, the tip of the nozzle is disposed further outside than the outside where the insulating material L2 is applied (that is, the side opposite to the side where the electrode material L1 is applied). Further, the tip of the air nozzle 5 is arranged so that the direction in which the air jet J blows out and the surface of the substrate S are substantially perpendicular. Alternatively, the tip of the air nozzle 5 may be inclined to the side where the electrode material L1 is applied (that is, the inner side) so that the air jet J blows out more strongly on the inner side. With such an arrangement, the air jet A is blown from the outer side toward the inner side of the outer end portion to which the insulating material L2 is applied, so that the surface of the applied insulating material L2 is crushed. However, the gaps G and G ′ with the electrode material L1 are widened so that the electrode material L1 and the insulating material L2 are in contact with each other, and the insulating material L2 is overlapped with the electrode material L1. Can do.

The insulating material profile changing unit 6 is based on the end position information of the insulating material L2 detected by the coating liquid end position detecting unit 4 and at least one of the position and angle of the air nozzle 5 and the flow rate and flow velocity of the air jet J. The cross-sectional shape and end position (so-called profile) of the insulating material L1 are adjusted by changing one of them.

For example, the tip of the air nozzle 5 (that is, the air jet outlet) is moved in the width direction (that is, the Y direction) of the substrate S or the thickness direction of the substrate S (that is, the Z direction) (that is, the position). And the gap G between the electrode material L1 and the insulating material L2 is adjusted.

Specifically, the insulating material profile changing unit 6 is configured such that the application end positions and the gaps G of the electrode material L1 and the insulating material L2 detected by the coating liquid end position detecting unit 4 are set to the reference position or the preset position. It is determined whether the gap dimension is in a state where they are far from each other or in a state where they are close to each other. And if it determines with it being in the state which is mutually distant, the insulating material L2 will be greatly expanded to the electrode material L1 side. On the other hand, if it is determined that they are close to each other, the insulating material L2 is pushed small toward the electrode material L1 side.

More specifically, a configuration in which the air nozzle 5 is attached to a slider of an actuator that can move in the Y direction or the Z direction as the insulating material profile changing unit 6 is illustrated. Then, when it is determined that the electrode material L1 and the insulating material L2 are in a distant state, the insulating material profile changing unit 6 brings the tip of the air nozzle 5 that blows out the air jet J closer to the insulating material L2. On the other hand, if it is determined that they are close to each other, the tip of the air nozzle 5 that blows out the air jet J is moved slightly away from the insulating material L2. Thus, by controlling the position of the slider to which the air nozzle 5 is attached, it is possible to adjust the degree to which the insulating material L2 is spread (that is, the application cross-sectional shape and end position of the insulating material L2).

FIG. 2 is a schematic diagram showing a main part of an example of a form embodying the present invention.
FIG. 2A is a plan view of the main part of the coating apparatus 1 shown in FIG. 1 and the electrode material L1 and the insulating material L2 applied on the surface of the substrate S. The positional relationship between the parts is as follows. Shown to be clear.
2B is a cross-sectional view taken along the line AA in FIG. 2A. The positions of the electrode material L1, the insulating material L2, and the like applied on the surface of the substrate S are shown. The relationship is shown to be clear.
FIG. 2 (c) shows a cross-sectional view taken along the line BB in FIG. 2 (a). An air nozzle 51 for the electrode material L1 and the insulating material L2 applied on the surface of the substrate S is shown. Etc. are shown so as to clarify the positional relationship.
FIG. 2D shows a cross-sectional view taken along the line CC in FIG. 2A, and an air nozzle 52 for the electrode material L1 and the insulating material L2 applied on the surface of the substrate S. Etc. are shown so as to clarify the positional relationship.

That is, the electrode material L1 and the insulating material L2 discharged from the coating die 3 are applied to the surface of the base material S in a state where a predetermined gap G is generated, but the insulating material disposed on the downstream side in the transport direction. The application end position detection unit 4 detects absolute or relative end position information of the insulating material L2. Then, for example, the position of the air nozzle 5 is adjusted by the insulating material profile changing unit 6 based on the end position information of the insulating material L2, and initially a predetermined gap G is separated as shown in FIG. The insulating material L2 that has been separated from the electrode material L1 is spread toward the electrode material L1 side as shown in FIG. 2C (the spacing interval is reduced to the gap G ′), and finally the insulating material. The application cross-sectional shape and end position of L2 are adjusted to the adjacent state as shown in FIG. Further, the insulating material L2 can be further spread on the electrode material L1 to form a laminated state.

Since the coating apparatus 1 according to the present invention has such a configuration, even if the electrode material discharge port and the insulating material discharge port of the coating die 3 are separated from each other, the air jet 5 of the air nozzle 5 can be used for insulation. The material L2 can be expanded so as to approach the electrode material L1 side, and the cross-sectional shape of the insulating material L2 and the gap with the electrode material can be changed.

Therefore, even when a coating material whose fluidity changes with time is discharged using the integrated coating die 3, the coating materials can be easily adjusted to a desired adjacent or laminated state.

[Modification of insulation material profile change part]
In the above description, the insulating material profile changing unit 6 according to the present invention is configured to adjust the application cross-sectional shape and the end position of the insulating material L2 by changing the position of the tip of the air nozzle 5 in the Y direction or the Z direction. Illustrated.

However, in order to embody the present invention, the insulating material profile changing unit 6B having the following configuration is not limited to the insulating material profile changing unit 6 having such a configuration.

FIG. 3 is a schematic diagram showing a main part of a modification of the embodiment embodying the present invention.

FIG. 3 shows an insulating material profile changing unit 6B, which is a modification of the insulating material profile changing unit 6 of the coating apparatus 1 shown in FIG.

The insulating material profile changing unit 6B adjusts the application cross-sectional shape and end position of the insulating material L2 by changing the inclination angle of the tip of the air nozzle 5.

Specifically, the insulating material profile changing unit 6B tilts the nozzle tip in the direction indicated by the arrow θ when the application end position of the insulating material L2 is to be moved toward the electrode material L1 (that is, inside). Thus, the flow rate and flow velocity in the X direction of the air jet J are increased.

More specifically, the air nozzle 5 is attached to a movable member such as the rotary stage mechanism 61 or the swivel mechanism, and the angle of the movable member is controlled to change the angle of the nozzle tip to change the X direction of the air jet J. It is possible to adjust the flow rate and the flow velocity to adjust the application cross-sectional shape and end position of the insulating material L2.

Furthermore, in realizing the present invention, the insulating material profile changing unit may have the following configuration.

For example, the insulating material profile changing unit is configured to control the flow rate and / or flow velocity of the air jet J ejected from the tip of the air nozzle 5.

Specifically, when the insulating material profile changing unit wants to move the position of the coating end of the insulating material L2 toward the electrode material L1 (that is, inside), the insulating material profile changing unit sends the air jet J to the insulating material at a predetermined flow rate and / or flow velocity. Blowing toward L2, or increasing the flow rate and / or flow velocity of the air jet J to be blown.

More specifically, the flow rate and / or flow velocity of the air jet J is adjusted by controlling the ON / OFF of the air supplied to the nozzle, controlling the pressure of the air supplied to the nozzle with an electropneumatic regulator, The opening degree of the throttle valve is controlled.

In addition, although the above-mentioned insulating material profile change part (6, 6B etc.) illustrated the structure which controls each independently the position and angle of the air nozzle 5, and the flow volume and / or flow velocity of the air jet J, it combines in combination. It is good also as the structure made. Furthermore, it is good also as a structure which adjusts the position of the air nozzle 5 to the conveyance direction (namely, X direction) of the base material S according to the position of the front-end | tip part of the air nozzle 5, the Z direction, and the strength of the air jet J.

Since the coating apparatus 1 according to the present invention has such a configuration, it detects the end position of the insulating material and adjusts the position of the air nozzle and / or the air jet so as to match the desired position. The position of the air nozzle and / or the flow rate or flow velocity of the air jet can be adjusted, and the thickness and end position of the insulating material can be adjusted.

[Another form]
In the above description, the configuration in which the air nozzle 5 is disposed on the downstream side of the insulating material application end position detection unit 4 is illustrated. However, the configuration is not limited to this, and the insulating material application end position detection unit 4 may have the following configuration.

1) Located downstream of the coating die 3 and upstream and downstream of the air nozzle 5. For example, in addition to the above-described configuration, a position indicated by a broken line 4 'in FIG. 2A (that is, downstream of the air nozzle 5) ) Also includes a displacement meter (that is, a profiler) similar to that described above.

2) Arranged only on the downstream side of the coating die 3 and downstream of the air nozzle 5, or the displacement meter is not disposed on the downstream side of the coating die 3 and upstream of the air nozzle 5, The structure arrange | positioned only in the downstream may be sufficient.

In this way, by disposing the displacement meter on the downstream side of the air nozzle 5, a smooth adjacent state or laminated state as previously assumed is not obtained, and even if unevenness occurs, the detection result Feedback control of the ejection position and strength of the air jet J of the air nozzle 5 and the subsequent adjustment of the electrode material L1 and the insulating material L2 so that the adjacent state or the laminated state becomes a gentle state, the unevenness is minimized. To the limit.

[Another form]
In the above description, a plurality of air nozzles 5 according to the present invention are provided in the transport direction of the substrate S, and the air nozzle 52 arranged on the downstream side is closer to the electrode material L1 side (that is, the air nozzle 51 arranged on the upstream side (that is, The configuration arranged on the inner side) is exemplified.

With such a configuration, it is possible to prevent the coating end portion of the highly fluid insulating material from spreading outward. That is, it is preferable because the insulating material can be prevented from being thinned and can be applied without impairing the insulating performance.

However, in realizing the present invention, the air nozzle is not limited to such a configuration, and may have the following configuration.

For example, one air nozzle may be used. Or the structure provided with the nozzle (what is called a flat nozzle) of the structure where an air jet blows off from several fine pores located in a line with a straight line may be sufficient. Or the structure provided with the nozzle (what is called a flat blowing nozzle) of the structure where an ellipse or a strip-like air jet spouts may be sufficient.

FIG. 4 is a schematic view showing a main part of another example of a form embodying the present invention. FIG. 4 shows a configuration in which one air nozzle 53 having a rectangular cross section is provided as an air nozzle 5 according to the present invention, instead of the two

air nozzles

51 and 52 having a circular cross section illustrated in FIG.
FIG. 4A is a plan view of the air nozzle 53 having a rectangular cross section and the electrode material L1 and the insulating material L2 applied on the surface of the substrate S, and is shown so that the positional relationship of each part becomes clear. Has been.
FIG. 4B shows a cross-sectional view taken along the line AA in FIG. 2A. The positions of the electrode material L1, the insulating material L2, and the like applied on the surface of the substrate S are shown in FIG. The relationship is shown to be clear.
FIG. 4C shows a cross-sectional view taken along the line BB in FIG. 2A, and the air nozzle 53 for the electrode material L1 and the insulating material L2 applied on the surface of the substrate S is shown. Etc. are shown so as to clarify the positional relationship.
FIG. 4D shows a cross-sectional view taken along the line CC in FIG. 2A, and an air nozzle 53 for the electrode material L1 and the insulating material L2 applied on the surface of the substrate S. Etc. are shown so as to clarify the positional relationship.

That is, the electrode material L1 and the insulating material L2 discharged from the coating die 3 are applied to the surface of the base material S in a state where a predetermined gap G is generated, but the insulating material disposed on the downstream side in the transport direction. The application end position detection unit 4 detects absolute or relative end position information of the insulating material L2. The position of the air nozzle 53 is adjusted by the insulating material profile changing unit 6 based on the end position information of the insulating material L2, and the electrodes are initially separated by a predetermined gap G as shown in FIG. As shown in FIG. 4C, the insulating material L2 that has been separated from the working material L1 is spread toward the electrode material L1 (the spacing is reduced to the gap G ′), and finally the insulating material L2 The application cross-sectional shape and end position of the coating are adjusted to the adjacent state as shown in FIG. Further, the insulating material L2 can be further spread on the electrode material L1 to form a laminated state.

The distance between the surface of the substrate S and the tip of the air nozzle 53 (so-called nozzle height) and the position in the width direction can be set to arbitrary positions and are moved by the insulating material profile changing unit 6.
Further, the cross-sectional shape and dimensions (width direction and transport direction length) of the air nozzle 53 may be appropriately set according to the viscosity of the insulating material L2, the coating width, and the transport speed of the substrate S.
Further, the flow rate (also referred to as air volume) of the air jet J blown from the air nozzle 53 may be appropriately set by a manually adjusted regulator, or variable by an electropneumatic regulator or the like.

[Another form]
In addition, the air nozzle 5 according to the present invention may be configured to spray a heated air jet in addition to a temperature-controlled (that is, room temperature) air jet or a cooled air jet. The heating temperature of the air jet is preferably determined and set as appropriate according to the material characteristics of the insulating material. In particular, it is preferable to use a heated air jet because an application end portion of an insulating material having high fluidity can be rapidly solidified as compared with a normal temperature or cooled air jet. Then, since the surface can be dried and temporarily solidified from the outer end portion of the insulating material applied by the heated air jet, the width direction end portion of the insulating material is more than the end position immediately after application. It is possible to prevent solidification in a state of spreading outward (that is, the thickness of the insulating material is reduced). That is, it can be said that application can be performed without impairing the insulating performance of the insulating material.

[Another form]
In the above description, the configuration in which the coating liquid end position detection unit 4, the air nozzle 5, and the insulating material profile changing unit 6 according to the present invention are provided in pairs at both end portions of the base material S is illustrated.

However, in the case of multi-line application in which a plurality of electrode materials L1 are applied and the insulating material L2 is applied to both ends, the coating liquid end position detection unit 4, the air nozzle 5, the insulating material profile The present invention can also be embodied by a configuration in which the changing unit 6 is appropriately added and arranged.

Alternatively, if the electrode material L1 and the insulating material L2 are applied separately from each other in a row, the coating liquid end position detecting unit 4, the air nozzle 5, and the insulating material profile changing unit 6 are provided with only one set. However, the present invention can be embodied.

[Another form]
In the above description, several configurations including the coating liquid end position detection unit 4 are illustrated. With such a configuration, it is possible to detect edge position information (such as a gap amount) between the electrode material and the insulating material applied separately, and adjust the width for moving the insulating material as appropriate.

For this reason, when using an integrated coating die in which the discharge port for the electrode material and the insulating material are separated from each other, when a coating material whose fluidity changes with time is discharged, or when the gap between the coating material amount and the insulating material is Even in the case where the air jet changes periodically, suddenly or suddenly, the strength of the air jet blown out from the air nozzle can be sequentially adjusted according to the size of the gap between them, which is preferable for continuous operation.

However, if the gap between the coating material amount and the insulating material does not change periodically or suddenly and there is almost no change over time, although there are gaps due to material characteristics, the coating liquid end position detection unit 4 may be omitted. In this case, if the insulating material profile changing unit 6 is first adjusted so that there is no gap between the coating material amount and the insulating material, the gap between the coating material amount and the insulating material is continuously maintained. The present invention can be embodied.

DESCRIPTION OF SYMBOLS 1 Application | coating apparatus 2 Base material conveyance part 3 Application | coating die 4 Coating liquid edge part position detection part 5 Air nozzle 6 Insulation material profile change part 30 Main body 31 Material discharge port for electrodes 32 Insulation material discharge port 51 Air nozzle (upstream side)
52 Air nozzle (downstream)
53 Air nozzle (rectangular cross section)
S base material L1 electrode material L2 insulating material G gap (immediately after application)
G 'clearance (during position adjustment)
LB Band-shaped beam J Air jet v Arrow (Base material transport direction)
θ arrow (tilt angle)

Claims

In a coating apparatus for applying an electrode material and an insulating material on the surface of a substrate,
A base material transport unit for transporting the base material at a predetermined speed in one direction;
An application die in which an electrode material discharge port for discharging the electrode material toward the surface of the base material and an insulating material discharge port for discharging the insulating material are disposed apart from each other;
An air nozzle disposed on the downstream side of the coating die and spraying an air jet toward the insulating material coated on the substrate;
An insulating material profile changing unit that changes at least one of the position and angle of the air nozzle and the flow rate and flow velocity of the air jet to adjust the gap between the insulating material and the electrode material. Coating device.
In a coating apparatus for applying an electrode material and an insulating material on the surface of a substrate,
A base material transport unit for transporting the base material at a predetermined speed in one direction;
An application die in which an electrode material discharge port for discharging the electrode material toward the surface of the base material and an insulating material discharge port for discharging the insulating material are disposed apart from each other;
An application material end position detection unit that is arranged on the downstream side of the application die and detects end position information of the electrode material and the insulating material applied on the substrate;
An air nozzle that is arranged on the downstream side of the coating material end position detection unit and blows an air jet toward the insulating material coated on the substrate;
At least one of the position and angle of the air nozzle and the flow rate and flow velocity of the air jet is changed based on the electrode material and the edge position information of the insulating material detected by the coating material end position detection unit. And an insulating material profile changing unit that adjusts the gap between the insulating material application cross-sectional shape and the electrode material.
A plurality of the air nozzles are provided in the conveying direction of the base material, and the air nozzles arranged on the downstream side are arranged on the electrode material side (inside) than the air nozzles arranged on the upstream side, The coating apparatus of Claim 1 or Claim 2.
The coating apparatus according to claim 1, wherein the air nozzle has a rectangular cross section.
5. The coating apparatus according to claim 1, wherein the air nozzle blows a heated air jet.