JP6745690B2 - Coating apparatus and method for adjusting die head of coating apparatus - Google Patents

Description

The present invention relates to a coating device that coats a film or a metal foil.

For example, the electrode plate of a lithium ion secondary battery, a lithium polymer secondary battery, or a nickel hydrogen secondary battery forms a film in which a paste-like coating liquid containing an active material is applied to a metal foil serving as a current collector. The configuration is known. The coating of this coating film is performed while the long current collector is transferred in the longitudinal direction by the back roll and the coating liquid is discharged from the die head to form the uncoated portion to be the lead portion. Form a work film. Then, the coating film is dried, compressed, and cut to manufacture an electrode plate having a desired size. This coating film has a slight change in the gap between the back roll and the die head, and also a slight change in the gap in the width direction. Influence. Therefore, in Patent Document 1, electric micrometers are provided at both ends of the die head to manage the gap between the die head and the current collector.

JP, 2006-110486, A

However, in the gap management using the electric micrometer of the related art, there is a problem that an attachment error is likely to occur when the electric micrometer is attached to the die head, and the attachment error affects the gap management.
An object of the present invention is to provide a coating apparatus and a die head adjusting method for the coating apparatus, which can accurately control the gap between the die head and the base material.

To achieve the above object, the coating apparatus of the present invention has a shim sandwiched between a pair of die heads and a discharge slit of the coating liquid is formed, and an air slit is provided at a position facing the back roll of the shim. It was decided to set the distance between the die head and the back roll by using the air pressure that was formed and discharged from the air slit using an air sensor.

According to the present invention, it is possible to accurately control the gap between the die head and the base material.

1 is a schematic diagram showing a coating device of Example 1. FIG. 3 is an exploded perspective view showing the die head of Example 1. FIG. 3 is a sectional view of the die head of Example 1. FIG. It is a front view showing the shim of Example 1. FIG. 3 is a diagram showing a reference block for calibrating the air sensor of the first embodiment. 3 is a partially enlarged view showing a state in which the reference block of Example 1 is mounted on a die head. FIG. 3 is a schematic perspective view showing the configuration of a die driving device of Example 1. FIG. 5 is an enlarged view showing the relationship between the die head and the back roll of Example 1. FIG. 3 is an enlarged cross-sectional view showing the relationship between the die head and the base material of Example 1. FIG. FIG. 3 is a block diagram showing a control configuration in a control control unit of the first embodiment. 6 is a flowchart showing a coating gap adjusting process in the control control unit of the first embodiment. 3 is a schematic diagram showing a work process of the coating apparatus of Example 1. FIG. It is a front view showing the shim of Example 2. It is a figure showing the positional relationship of a die head and a back roll at the time of adjustment by a die drive device.

[Example 1]
FIG. 1 is a schematic diagram showing a coating apparatus of Example 1. The coating apparatus includes a die head 11, a back roll 12 facing the die head 11, a base material roll in which a base material 13 is wound in a roll shape, and a plurality of adjusting rolls for adjusting tension when transferring the base material. It has a drying furnace for drying the coating liquid and a winding roll for winding the base material 13 after coating. The die head 11 is detachably attached to the die base 14. The die base 14 has a die driving device 15 that controls the relative positions of the die head 11 and the back roll 12. The coating liquid tank 200 stores a pasty coating liquid containing an active material. The coating liquid is pressure-fed by the pump 203 to the die head 11 via the supply pipe 201. The coating liquid discharged from the die head 11 is coated on the surface of the base material 13 to form a coating film 13a. The coating device has a control unit CU. The control unit CU controls the rotation of the roll, the output of the pump, the operating state of the die driving device 15, the conditions of the drying furnace, and the like.

FIG. 2 is an exploded perspective view showing the die head of the first embodiment, and FIG. 3 is a sectional view of the die head of the first embodiment. The die head 11 has a substantially rectangular parallelepiped first die 1, a substantially rectangular parallelepiped second die 2, and a shim 3 sandwiched between the first die 1 and the second die 2. The first die 1 is a groove-shaped manifold 5 that extends in the longitudinal direction on the surface facing the second die 2, and a coating that connects the manifold 5 and the supply pipe 201 by penetrating the first die 1 substantially at the center in the longitudinal direction. And a working fluid supply port 4. The second die 2 has an air supply port 7 for supplying air at a position where it does not communicate with the manifold 5 when combined with the first die 1. A pair of air supply ports 7 are formed at both ends of the second die 2.

FIG. 4 is a front view showing the shim of the first embodiment. The shim 3 is a thin metal plate that defines the opening size of the ejection port 6 of the die head 11. In the approximately central region of the shim 3, there are three slits 30 for discharging the coating liquid, which are separated by the two partitions 9. At both ends of the shim 3, air notches 10 that define the opening size of the air outlet 8 are formed, and air slits 70 are formed.

As shown in the AA cross section of FIG. 3, the air supply port 7 is connected to a position communicating with the air slit 70 of the shim 3. The air supplied from the air supply port 7 passes through the gap formed between the first die 1 and the second die 2 by the air slit 70, and is blown out from the air blowout port 8. Further, as shown in the BB section of FIG. 3, the coating liquid supply port 4 is connected to a position communicating with the manifold 5. The manifold 5 is formed along the longitudinal direction of the first die 1 and communicates with the three coating liquid discharge slits 30. Further, as shown in the CC cross section of FIG. 3, the partition 9 forms a passage for supplying the coating liquid to the plurality of coating liquid discharge slits 30 by closing the manifold 5. Further, as shown in the section D-D of FIG. 3, the coating liquid supplied through the manifold 5 is supplied to the coating liquid discharge slit 30 and discharged from the discharge port 6.

From the viewpoint of ensuring the performance of the air sensor 16, it is desirable to set the size of the air outlet 8 to a size that is substantially the same as a circle having an effective opening area of 1 to 1.5 mmφ. For example, the air outlet 8 is a slit-shaped quadrangle, and therefore, assuming that the thickness of the shim 3 is ax, the width of the air slit 70 is by, and the effective opening area is R,
R=1.3×((ax×by) ^0.625 /(ax+by) ^0.25 )
Set using the relational expression of. ax is a value set between 50 μm and 150 μm defined by the shim 3, and R is a value set appropriately between 0.1 and 1.0 mm. After determining these conditions, the width by of the air slit 70 is set based on the above relational expression.

(About die drive and air sensor)
FIG. 5 is a diagram showing a reference block for calibrating the air sensor of the first embodiment, and FIG. 6 is a partially enlarged view showing a state in which the reference block of the first embodiment is mounted on a die head. FIG. 5 shows a front view and a rear perspective view of the reference block 24. The reference block 24 is formed with a reference surface 22 that comes into contact with the die head 11, a groove portion 23 having a gap 40 having a predetermined distance (spacing) from the reference surface 22, and a thickness ax that is substantially the same as that of the shim 3, and is provided in the air outlet 8. The positioning portion 25 is a convex portion that can be inserted into the adjacent ejection ports 6. The predetermined distance formed in the gap 40 of the groove 23 is set to be substantially the same as the distance set between the ejection port 6 of the die head 11 and the base material 13 (hereinafter referred to as the coating gap 20). Is desirable. The reference block 24 is mounted such that the longitudinal direction of the reference block 24 is aligned with the longitudinal direction of the die head 11 by inserting the positioning portion 25 into the ejection port 6. At this time, the reference surface 22 is in contact with the mating surface of the first die 1 and the second die 2, and the groove portion 23 is installed so as to cover the upper portion of the air outlet 8 of the die head 11.

FIG. 7 is a schematic perspective view showing the configuration of the die driving device of the first embodiment. An air pipe 18 is connected to the air supply port 7 of the die head 11. An air sensor 16 that is turned on when a predetermined air pressure is reached and a precision regulator 17 that can supply a precise air pressure are connected to the air pipe 18.

Further, the die base 14 has a die driving device 15 capable of changing the relative position of the die base 14 with respect to the back roll 12. The die driving device 15 is a device that drives a screw mechanism by driving a motor. The die driving device 15 has a pair of die driving units (right side driving unit, left side driving unit) at both ends of the die head 11. The control unit CU outputs a motor drive signal to the die drive device 15, and controls the coating gap 20 based on signals from an encoder, a linear scale, a displacement meter, and the like.

FIG. 8 is an enlarged view showing the relationship between the die head of Example 1 and the back roll, and FIG. 9 is an enlarged sectional view showing the relationship between the die head of Example 1 and the base material. The coating apparatus starts coating after performing the adjustment process of the coating gap 20 between the die head 11 and the back roll 12. At this time, the coating gap 20 is set in the range of 50 μm to 150 μm. Thereby, the coating width, the coating amount profile, etc. are set.

(About air sensor calibration)
The coating apparatus of Example 1 applies a coating liquid containing an active material to a base material 13 as a current collector of a secondary battery, for example. However, it is necessary to use various types of die heads because it is required to support a wide variety of products. Further, even if the coating device is used for one type of production line, it will be stopped when a predetermined number of coatings are completed. At this time, if the coating material is left in a stopped state, precipitation of the active material occurs inside the die and normal coating cannot be performed.

From the background described above, the coating apparatus generally removes the die head 11 and disassembles and cleans it every operation. At this time, if distance measuring means such as an electric micrometer is provided at both ends of the die head 11 in order to manage the coating gap, the distance is measured with respect to the die head 11 in order to cope with frequent disassembly cleaning. The means must be removable. However, since it is necessary to manage the coating gap on the micro order, the reproducibility is impaired due to an assembly error or the like accompanying the attachment/detachment of the distance measuring means. Therefore, in order to obtain micro order accuracy, this adjustment is troublesome. This is a factor that makes it difficult to improve productivity.

Therefore, in the first embodiment, the air sensor 16 is adopted. The air sensor 16 detects a change in pressure applied to the air ejection port depending on the distance of the gap, and the accuracy of the change exhibits sufficient accuracy even when it is managed in the micro order. Further, it is only necessary to secure an air passage in the die head 11, and cleaning is easy. In addition, the step of attaching/detaching the air outlet 8 to/from the die head 11 does not occur, and there is no need to worry about an assembly error associated with the attachment/detachment. Further, since the air outlet port 8 is arranged adjacent to the ejection port 6, the influence of distortion of the die head 11 itself can be eliminated as much as possible when controlling the coating gap of the ejection port 6, and the measurement accuracy can be improved. Can be improved.

Next, the calibration of the air sensor 16 will be described. When the gap is measured by the air sensor 16, changes in the assembly status of the die head 11 and the assembly status of the air pipe 18 due to assembly errors, influences on the air sensor value due to environmental changes such as temperature and humidity, and the thickness of the die head 11 It is necessary to set the ON threshold value of the air sensor 16 according to a change such as a change to a different shim or a change of the die head itself. Therefore, a reference block 24 having a groove portion 23 that is substantially the same as the coating gap is attached to the die head 11, and dry air is output from the precision regulator 17. Then, this value is set as the ON threshold of the air sensor. Further, by using the same reference block, the on threshold value when the die head 11 is assembled can be set with good reproducibility and accuracy. The air sensor 16 continuously outputs an ON signal when the air pressure is equal to or higher than the ON threshold, and continuously outputs an OFF signal when the air pressure is less than the ON threshold.

(About coating gap adjustment processing)
FIG. 10 is a block diagram showing the control configuration in the control control unit of the first embodiment. When the origin setting switch SW provided in the coating apparatus drive unit 100 is turned on, the control unit CU outputs a drive signal to the motor driver DR of the right side drive section and the motor driver DL of the left side drive section of the die drive apparatus 15. .. As a result, the right motor 15R of the right side drive unit and the left motor 15L of the left side drive unit are driven, and adjustment of the position of the die head 11 is started. At this time, dry air is output from the precision regulator 17 provided in each drive unit. Then, the control unit CU executes the coating gap adjusting process based on the ON signals of the right sensor 16R and the left sensor 16L of the air sensor 16.

FIG. 11 is a flowchart showing the coating gap adjusting process in the control control unit of the first embodiment.
In step S0, it is determined whether or not the origin setting switch SW is on. If it is on, the process proceeds to steps S1 and S18, and if not, this step is repeated.
In step S1, the left motor 15L is normally rotated.
In step S2, it is determined whether or not the deceleration position is reached. When it is determined that the deceleration position is reached, the process proceeds to step S3, and otherwise returns to step S1 to continue driving the left motor 15L. Here, the deceleration position is a position preset based on a value from a linear scale of the die driving device 15 or a displacement gauge, and is a value at which a rough die head position can be set.
In step S3, the left motor 15L is stopped.
In step S4, it is determined whether or not the right motor 15R is stopped. If it is stopped, the process proceeds to step S5, otherwise step S3 is repeated. That is, by stopping the left and right motors 15L and 15R of the left and right sensors 16L and 16R without synchronously operating both motors, the parallelism between the back roll 12 and the die head 11 is adjusted to improve the position accuracy. ..

In step S5, the left motor 15L is normally rotated at a low speed. That is, when the die head 11 approaches the back roll 12 to some extent, the die head 11 gradually approaches the back roll 12 at a low speed, thereby performing adjustment with high accuracy.
In step S6, it is determined whether or not the left sensor 16L is on. If it is on, the process proceeds to step S7, and otherwise, step S5 is repeated.
In step S7, the left motor 15L is stopped.
In step S8, it is determined whether or not the right motor 15R is stopped. If it is stopped, the process proceeds to step S9, and otherwise, step S7 is repeated.
FIG. 14 is a diagram showing the positional relationship between the die head 11 and the back roll 12 in step S8. In the operation of step S8, when the right motor 15R is moving even after the left motor 15L is stopped, the arrangement of the motor 15 for moving the die head 11 and the arrangement of the air outlet 8 are displaced in the longitudinal direction of the die head 11. Therefore, at the position where the right motor 15R is stopped, the gap α between the left air outlet 8L and the back roll 12 is advanced by β compared to when the left motor is stopped. Therefore, there is a possibility that the parallel accuracy of the die head 11 and the back roll 12 is not sufficiently obtained. Therefore, in order to further improve the parallel accuracy, the following steps are executed and the position adjustment is performed again.
In the subsequent steps, the number of times can be reduced by making the arrangement of the motor 15 of the die head 11 and the arrangement of the air outlet 8 close to each other in the longitudinal direction of the die head 11 or by setting them to be substantially the same. is there.

In step S9, the left motor 15L is reversely rotated at a low speed in order to return the position of the left air sensor that has advanced too much in step S8.
In step S10, it is determined whether or not the left sensor 16L is off. If it is off, the process proceeds to step S11, and otherwise, step S9 is repeated. By reversing the left motor 15L at a low speed, the die head 11 is slightly retracted from the back roll 12.
In step S11, the left motor 15L is stopped.
In step S12, it is determined whether or not the right motor 15R is stopped. If it is stopped, the process proceeds to step S13, and otherwise, step S12 is repeated.

In step S13, the left motor 15L is normally rotated at a low speed in order to return the position of the left air sensor that has moved too far in step S9.
In step S14, it is determined whether or not the left sensor 16L is on. If it is on, the process proceeds to step S15, and otherwise, step S14 is repeated. That is, in step 13, the adjustment accuracy improved by the operation of step S9 is further improved by rotating the left motor 15L forward at a low speed.
In step S15, the left motor 15L is stopped.
In step S16, it is determined whether or not the right motor 15R is stopped. If it is stopped, the process proceeds to step S17, and otherwise, step S16 is repeated.
By repeating the above operation, the left and right motors 15 are stopped substantially at the same time, and the die head 11 and the back roll 12 can be stopped in a substantially parallel state.
In step S17, the left reference data is written. Specifically, the values of the encoder, the linear scale, the displacement gauge, and the like when the left motor 15L is stopped are rewritten to the origin set value in the control unit CU. As a result, the origin of the left drive unit is set.

Similarly, in steps S18 to S34, the origin of the right drive unit is set. Note that the processes performed in steps S18 to S34 are processes in which the left and right sides of the processes performed in steps S1 to S17 are reversed, and are substantially the same, so description thereof will be omitted.

In step S35, the data writing of the left and right drive units is completed.
In step S36, the completion of origin setting is stored.
In step S37, the die head 11 is moved to the retracted position. That is, as the origin of the die head 11, a position corresponding to the ON threshold of the air sensor 16 is adopted. Then, if this origin is accurately determined, then the position can be adjusted based on the motor rotation speed or the like.
Here, since the coating gap between the die head 11 and the back roll 12 is set to about 20, the position of the die head 11 is once retracted from the back roll 12 to a preset retracted position, and the die head 11 is coated. Cleaning work in the case of being contaminated with the working liquid and foil passing for setting the base material 13 on the back roll 12 are performed.

FIG. 12 is a schematic diagram showing a work process of the coating apparatus of the first embodiment.
At the stage of FIG. 12A, the die head 11 is not attached. In this state, the die head 11 is fixed to the die base 14, and the connection bracket 202 and the pipe 201 are attached.
Next, as shown in FIG. 12B, the reference block 24 is placed on the air outlet 8 and the air sensor 16 is calibrated.
Next, as shown in FIG. 12C, the adjustment of the coating gap of the die head 11 is completed, and the setting of the coating device is completed.
A desired coating gap is set based on the reference of the coating gap set here, the base material 13 is transferred, and the coating liquid is discharged from the die head 11 to form the coating film 13a. When the coating process is completed and the coating device is stopped, the die head 11 is removed again and disassembly cleaning is performed.

[Effect of Example 1]
The effects of the coating apparatus of Example 1 are listed below.
(1) A coating device that discharges a coating liquid from a die head 11 onto a surface of a substrate 13 to be conveyed to form a coating film 13a on the substrate 13, and includes a first die 1 and a second die 2. A shim 3 sandwiched between (a pair of die heads) and having a slit 30 (discharging slit) for discharging a coating liquid and a base material 13 are guided, and the base material 13 and the discharge port 6 of the die head 11 are guided. A back roll 12 that defines a relative position to the die head 11, a die drive device 15 (adjusting means) that is provided in the die head 11 and that can change the coating gap (the distance between the ejection port of the die head and the substrate). 3, the air slit 70 is formed at a position facing the back roll 12, and the air sensor 16 that measures the coating gap according to the air pressure discharged from the air slit 70.
Therefore, the coating gap can be managed accurately.

(2) A pair of air slits 70 are formed at both ends of the shim 3.
Therefore, the space between the die head 11 and the back roll 12 can be managed in parallel.
(3) The pair of air slits 70 are formed at positions adjacent to the ejection ports 6 of the die head 11.
Therefore, the coating gap can be managed at a position close to the position where the coating film 13a is actually formed.
(4) The ejection port 6 of the die head 11 is formed between the air slits 70.
Therefore, the coating gap at the ejection port 6 can be managed accurately.
(5) The die head 11 has the air supply port 7 that connects the air sensor 16 and the air slit 70.
Therefore, it is possible to configure a sensor that does not need to be attached to and detached from the die head 11.
(6) The die head 11 is removable and has a reference block 24 for setting the threshold value of the air sensor 16.
Therefore, the air sensor 16 can be easily calibrated.

(7) A method of adjusting the die head of a coating apparatus, wherein a coating liquid is discharged from the die head 11 onto the surface of the substrate 13 to be conveyed to form a coating film 13a on the substrate 13, and the substrate 13 is guided. Then, the back roll 12 that defines the coating gap (the relative position between the base material and the discharge port of the die head), the air slit 70 formed in the shim 3, and the die head 11 according to the air pressure discharged from the air slit 70. An air sensor 16 for measuring the distance between the back roll 12 and the back roll 12, and a die driving device 15 provided on the die head 11 and capable of changing the distance between the die head 11 and the back roll 12. Thus, the die head 11 is brought close to the back roll 12, and the origin of the die driving device 15 is set at a position where the air sensor 16 measures an on threshold value which is a predetermined air pressure.
Therefore, the coating gap can be managed accurately.

(8) The on-threshold value is set by the reference block 24 (reference means) having the groove 23 in which the predetermined distance from the die head 11 is set.
Therefore, the calibration of the air sensor 16 can be easily performed with good reproducibility.
(9) A pair of air slits 70 are formed at both ends of the shim 3, the air sensors 16 are connected to the pair of air slits 70, and a pair of die driving devices 15 is provided at both ends of the die head 11. Therefore, the coating gap can be managed accurately.
(10) When moving the die head 11 toward the back roll 12, the die driving device 15 independently stops one die driving device 15 and the other die driving device 15.
Therefore, the die head 11 and the back roll 12 can be parallel to each other.
(11) When moving the die head 11 toward the back roll 12, the die driving device 15 moves the die head 11 toward the back roll 12 and stops at a position where the air sensor 16 is turned on. Is moved away from the back roll 12 by a predetermined distance, the die head 11 is moved toward the back roll 12 again, and the air sensor 16 is stopped at a position where the air sensor 16 is turned on.
Therefore, the coating gap can be managed more accurately.

[Example 2]
Next, a second embodiment will be described. Since the basic configuration is the same as that of the first embodiment, only different points will be described. FIG. 13 is a front view showing the shim of the second embodiment. In the first embodiment, the air slits 70 are formed on both ends of the shim 3. On the other hand, the second embodiment is different in that, in addition to the air slits 70 at both ends, the air slits 70 are formed at positions facing the back roll 12 of the partition 9. Accordingly, the second die 2 is provided with four air supply ports 7 for supplying air to the air slits 70. Thereby, the coating gap can be managed more accurately.

[Other embodiments]
Although the mode for realizing the present invention has been described above based on the embodiments, the specific configuration of the present invention is not limited to the embodiments, and design changes within the scope not departing from the gist of the invention. Etc. are included in the present invention. For example, in the embodiment, the manufacturing of the secondary battery is described as an example, but the present invention is not limited to the secondary battery, and may be used for a magnetic tape or another manufacturing line.

The technical idea that can be understood from the embodiment described above will be described below.
The coating device is a coating device that discharges the coating liquid from the die head onto the surface of the substrate to be conveyed to form a coating film on the substrate, and the coating device is sandwiched between a pair of die heads. A shim in which a discharge slit is formed, a back roll that guides the base material, and defines a relative position between the base material and the discharge port of the die head, and the back roll provided in the die head, and the discharge port of the die head and the An adjusting means capable of changing the distance between the base material, an air slit formed in the shim and formed at a position facing the back roll, and the die head according to the air pressure discharged from the air slit. An air sensor that measures a distance from the back roll.
In a more preferred aspect, in the above aspect, a pair of the air slits are formed at both ends of the shim.
In still another preferred aspect, in any one of the above aspects, the pair of air slits is formed at a position adjacent to an ejection port of the die head.
In yet another preferred aspect, in any one of the above aspects, the ejection port of the die head is formed between the air slits.
In still another preferred aspect, in any one of the above aspects, a plurality of discharge ports of the die head are provided through a partition formed in the shim, and in addition to the pair of air slits, the back roll is provided in the partition. It has an air slit formed at a position facing with.
In still another preferred aspect, in any one of the above aspects, an air supply port that is formed in the die head and connects the air sensor and the air slit is provided.
In still another preferred aspect, in any one of the above aspects, the die head has a reference block that is removable and sets a threshold value of the air sensor.

The die head adjusting method of the coating apparatus is a die head adjusting method of a coating apparatus, in which a coating liquid is discharged from a die head onto the surface of a substrate to be conveyed to form a coating film on the substrate, A back roll that guides a base material and defines a relative position between the base material and a discharge port of the die head, an air slit formed in the shim, and the die head according to the air pressure discharged from the air slit. An air sensor for measuring the distance between the back roll and the die head, provided with an adjusting means that can change the distance between the die head and the back roll, the adjusting means to the back roll. The position where the air sensor detects an on-threshold value that is a predetermined air pressure is set as a reference value of the adjusting means, by bringing the die head close to the die head.
In a more preferred aspect, in the above aspect, the predetermined air pressure is set by a reference means having a groove portion that is set at a predetermined distance from the die head.
In still another preferred aspect, in any one of the above aspects, a pair of the air slits is formed at both ends of the shim, the air sensors are connected to the pair of air slits, respectively, and the adjusting unit is a die head. A pair is provided at both ends.
In yet another preferred aspect, in any one of the above aspects, the adjusting unit moves one adjusting unit and the other adjusting unit independently when moving the die head toward the back roll.
In still another preferred aspect, in any one of the above aspects, the adjusting unit moves the die head toward the back roll when the die head is moved toward the back roll, and the air sensor causes a predetermined air flow. At the position where the pressure is measured, the die head is separated from the back roll by a predetermined distance from this position, the die head is approached again toward the back roll, and at the position where the air sensor measures the predetermined air pressure. Adjust by stopping.

1 1st die 2 2nd die 3 Shim 4 Coating liquid supply port 5 Manifold 6 Discharge port 7 Air supply port 8 Air outlet 9 Partition 11 Die head 12 Back roll 13 Base material 13a Coating film 14 Die base 15 Die drive device 15L Left motor 15R Right motor 16 Air sensor 16L Left sensor 16R Right sensor 17 Precision regulator 18 Air piping 20 Coating gap 22 Reference surface 23 Groove 24 Reference block 30 Coating liquid discharge slit 40 Gap 50 Bending adjustment mechanism 70 Air slit 100 Coating Device drive unit 200 Coating liquid tank 201 Supply pipe 202 Connection bracket 203 Pump CU control unit

Claims (5)

A coating device for forming a coating film on a substrate by discharging a coating liquid from a die head onto the surface of a substrate to be transported,
Is sandwiched by the pair of die head, and the shim in which a plurality of discharge slits are formed of a plurality of partition between the plurality of partition separation formed coating solution,
A back roll that guides the base material and defines a relative position between the base material and the ejection port of the die head,
The die head vignetting Installing detachable, and a die base having a changeable adjustment means the distance between the discharge port of the die head and the substrate,
A plurality of air slits formed in the shim, formed at a position facing the back roll,
An air sensor that measures the distance between the die head and the back roll according to the air pressure discharged from the plurality of air slits,
Have a,
The coating device, wherein the plurality of air slits are formed on both ends of the shim and the plurality of partitions . A die head adjusting method for a coating device, comprising forming a coating film on a substrate by discharging a coating liquid from a die head onto the surface of a substrate to be transported,
Shim sandwiched between a pair of die heads, a plurality of partitions and a plurality of discharge slits of the coating liquid separately formed by the plurality of partitions, and a shim formed,
A back roll that guides the base material and defines a relative position between the base material and the ejection port of the die head,
A plurality of air slits formed on both ends of the shim and the plurality of partitions ,
An air sensor that measures the distance between the die head and the back roll according to the air pressure discharged from the plurality of air slits,
The die head vignetting Installing detachable, and a die base having a changeable adjustment means the distance between the back roller and the die head,
Equipped with
The die head is brought closer to the back roll by the adjusting means,
A die head adjusting method for a coating apparatus, wherein a position where the air sensor detects a predetermined air pressure is used as a reference value of the adjusting means. The die head adjusting method for a coating apparatus according to claim 2 ,
The die air adjusting method for a coating apparatus, wherein the predetermined air pressure is set by a reference means having a groove portion set with a predetermined distance from the die head. The die head adjusting method for a coating apparatus according to claim 3 ,
Before SL air sensor are respectively connected to the plurality of air slits,
The die head adjusting method for a coating apparatus, wherein a pair of the adjusting means is provided at both ends of the die head. The die head adjusting method for a coating apparatus according to claim 4 ,
The adjusting means stops the one adjusting means and the other adjusting means independently when the die head is moved toward the back roll, and the adjusting method is a die head adjusting method for a coating apparatus.

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