JPH1043659A - Intermittent coating apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enhance an intermittent coating processing speed even when an interval between coating matters is small in an intermittent coating apparatus applying a coating soln. on a continuously supplied medium. SOLUTION: Two sets of coating means 14, 16 (slits 14A, 16A, coating liquid sumps 14B, 16B) are provided before and behind the die 12A of a coating head 12 in the supply direction of the medium 20 and paint supply pumps 14C, 16C are individually connected to coating means 14, 16 to control so as to independently emit the coating soln. in a paint storage tank 18 from respective slits 14A, 16A. The respective coating means 14, 16 are alterately started to form a coating pattern 22A by the coating means 14 and, thereafter, a coating pattern 22B is formed by the coating means 16 and the operation interval between the coating means 14, 16 can be increased.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intermittent coating apparatus for intermittently applying a coating liquid on a predetermined medium to form a coating pattern having a constant width and a constant length.

[0002]

2. Description of the Related Art FIG. 3 is an explanatory view showing an outline of a conventional intermittent coating device, and FIG. 4 is a plan view showing a specific example of a coating pattern formed by such an intermittent coating device. In FIG. 3, the medium 100 is continuously supplied in a direction indicated by an arrow Z in the drawing by a supply mechanism (not shown), and a coating liquid is applied intermittently by a coating head 102 provided in the middle, thereby forming a coating pattern having a predetermined shape. You. The coating head 102 has a die 102A arranged to face the application surface of the medium 100. The die 102A has a coating liquid reservoir 102B to which a coating liquid is supplied, and a coating liquid reservoir 1B.
A slit 102C is formed on the surface of the die 102A that faces the medium 100 from 02B. Note that the slit 102C has a length corresponding to the width of the application pattern 108.

[0003] A coating liquid in a coating liquid storage tank 106 is applied to a coating liquid reservoir 102 by a coating liquid supply pump 104.
B, the application liquid is discharged from the slit 102C onto the application surface of the medium 100. Further, by controlling the start and stop of the paint supply pump 104 at predetermined intervals, a square application pattern 108 as shown in FIG. 4 is formed. The traveling distance of the medium 100 is detected by a pulse encoder (not shown) or the like, and based on the encoder pulse, the coating head 102
The control of the discharge of the application liquid is performed.

[0004]

In the above-described intermittent coating apparatus, when the processing speed is to be increased, the supply speed of the medium 100 is increased, and the starting and stopping of the paint supply pump 104 are performed quickly. However, the control speed of the coating head 102 by the paint supply pump 104 has a certain limit. In particular, when the gap G between the non-coating portions in FIG. 4 is narrow, there is a problem that the coating head 102 cannot be normally controlled by the paint supply pump 104 in this portion, and it is not possible to maintain a proper coating pattern.

On the other hand, if the interval G between the non-coated portions is increased, it is necessary to perform a process of cutting the non-coated portion while leaving the required length after the process in the intermittent coating device. Since the coated portion is long, the amount of waste is large, and the yield is low. In addition, there is also a problem in that the post-processing becomes complicated due to the processing of the unnecessary non-coated portion, which leads to an increase in equipment cost. The purpose of the present invention is
An object of the present invention is to provide an intermittent coating apparatus capable of improving the processing speed of intermittent coating even when the interval between coating patterns is small.

[0006]

According to the present invention, in order to achieve the above object, a coating pattern having a constant width and a constant length is formed by intermittently applying a coating liquid on a medium continuously supplied. The intermittent coating apparatus has a plurality of coating means for independently supplying a coating liquid, and forms a coating pattern by sequentially driving the coating means. In the intermittent coating apparatus of the present invention as described above, since the supply of the coating liquid is controlled independently by the plurality of coating units and the coating pattern is formed in order, the coating pattern is formed with an increase in the processing speed. Even when the period is shortened, the control speed of each application unit may be low.

For example, when two coating means are provided, the first coating pattern is formed by controlling the start and stop of the first coating means, and the second coating pattern is controlled by starting and stopping the second coating means. Can be formed. Therefore, for example, even when the interval G between the non-application portions shown in FIG. 4 is small, there is no need to stop and start a single application unit in this cycle, and the intermittent application operation can be quickly performed in a stable state. .

[0008]

Next, an embodiment of an intermittent coating apparatus according to the present invention will be described. FIG. 1 is an explanatory diagram showing an example of an intermittent coating device according to the present invention. The intermittent coating apparatus 10 of the present embodiment has a coating head 12 in which two sets of coating units 14 and 16 are provided before and after a die 12A in a supply direction of a medium 20. First coating means 14
Is composed of a slit 14A and a coating liquid reservoir 14B.
The coating means 16 includes a slit 16A and a coating liquid reservoir 16B.
Consisting of Each of the slits 14A and 16A has a length corresponding to the width of the coating pattern 22.

The coating solution reservoirs 14B and 16B of the coating means 14 and 16 are independently provided with the coating material supply pump 1
4C, 16C, and each paint supply pump 14
The supply of the coating liquid in the paint storage tank 18 is individually controlled by C and 16C. The travel distance of the medium 20 is detected by a pulse encoder (not shown) or the like, and based on the encoder pulse, each slit 14A, 16A in the coating head 12 is formed.
The control of the discharge of the application liquid from is performed. Further, the intermittent coating device 10 of the present example is for creating a positive electrode member or a negative electrode member of a lithium ion battery, for example.
For example, a coating pattern 22 is formed by applying a solvent of carbon for the positive electrode and lithium cobaltate for the negative electrode on a medium 20 of an aluminum foil constituting the positive electrode member or a copper foil constituting the negative electrode member. is there.

The medium 20 on which the coating pattern 22 is formed is cut into a predetermined width, and is cut so as to leave uncoated portions at both ends of the coating pattern 22.
It is arranged in a wound state together with the separator in the battery case. The non-coating portions at both ends of the coating pattern 22 are connected as terminals. Next, an operation when the application pattern 22 is formed by the intermittent application device 10 having the above configuration will be described.

FIG. 2 is a plan view showing an example of a coating pattern 22 formed on the medium 20 by the intermittent coating apparatus 10, and a solid line in the drawing indicates a coating pattern formed by the first coating means 14. And the broken line indicates the second coating means 1
6 shows a coating pattern formed by No. 6. In the intermittent coating device 10, the coating pattern 22
Is formed, after the supply of the medium 20 is started, a first coating pattern 22A is formed by the first coating unit 14, and then a second coating pattern 22B is formed by the second coating unit 16. Further, a third coating pattern 22C is formed by the first coating unit 14, and a fourth coating pattern 22D is formed by the second coating unit 16.

As described above, by operating the two coating means 14 and 16 alternately to form the equally-shaped coating patterns 22 at equal intervals, even when the gap G between the non-coated portions is small, It is not necessary to control the operation of the application units 14 and 16 periodically, and the intermittent application operation can be quickly performed in a stable state. That is, let G be the interval between the uncoated portions,
Assuming that the length of the application portion (application pattern) is L, the interval from the stop of the application operation to the restart of the application means 14 and 16 is L + 2G, which is much longer than the conventional G.

For example, if 5G = L, L + 2G = 7
Since G is used, if a coating pattern similar to that of the related art is formed, it is theoretically possible to work at a processing speed seven times higher, and productivity can be greatly improved.
Further, in the present embodiment, the intermittent coating apparatus can be formed compact by providing two coating units 14 and 16 in one coating head 12. Further, in this example, since a plurality of supply units of the application liquid are provided, a plurality of supply units can be collectively performed at the time of maintenance, which is advantageous in maintenance.

In the above example, the case where two coating units 14 and 16 are provided in one coating head 12 has been described. However, it is also possible to provide more coating units and achieve higher speed. It is. In addition, by providing a spare application unit, even if a trouble occurs in the application unit in use, the operation can be continued using the spare application unit without stopping the apparatus for a long time. It becomes possible.

In the above example, the case where two coating means 14 and 16 are provided in one coating head 12 has been described. However, a plurality of coating heads 12 may be provided. In the above-described example, the application patterns are alternately formed by the application units 14 and 16 arranged close to each other. However, the application units 14 and 16 are arranged at separate positions, and The medium 2 is
0, an application pattern of length L is sequentially formed at intervals of L + 2G, and the other application means 16 sequentially forms an application pattern of length L in a non-application area of L + 2G. Is also good.

[0016]

As described above, in the intermittent coating apparatus of the present invention, the supply of the coating liquid is controlled independently by a plurality of coating means, and the coating pattern is formed in order. Even when the cycle of the application pattern is shortened with the rise, the control speed of each application unit may be slow, so that there is an effect that the intermittent application operation can be quickly performed in a stable state.

[Brief description of the drawings]

FIG. 1 is an explanatory diagram showing an example of an intermittent coating device according to the present invention.

FIG. 2 is a plan view showing an example of a coating pattern formed by the intermittent coating device shown in FIG.

FIG. 3 is an explanatory view showing an example of a conventional intermittent coating device.

FIG. 4 is a plan view showing an example of a coating pattern formed by the intermittent coating device shown in FIG.

[Explanation of symbols]

10 ... intermittent coating device, 12 ... coating head,
12A: die, 14, 16: coating means, 14A, 1
6A: slit, 14B, 16B: coating liquid pool, 1
4C, 16C: paint supply pump, 18: paint storage tank, 20: medium, 22, 22A, 22B, 2
2C, 22E ... Application pattern.

Claims (8)

[Claims] An intermittent coating apparatus for forming a coating pattern having a constant width and a constant length by intermittently applying a coating liquid on a medium which is continuously supplied. An intermittent coating apparatus, comprising: a plurality of coating units for performing a coating process, and forming a coating pattern by sequentially driving each of the coating units. 2. The intermittent application device according to claim 1, wherein the plurality of application units are disposed before and after in a supply direction of the medium. 3. The intermittent coating apparatus according to claim 1, wherein one application pattern is formed by one driving of one of the plurality of application units. 4. The intermittent coating apparatus according to claim 3, wherein the plurality of coating means form a uniform-shaped coating pattern at equal intervals. 5. The coating means includes a die arranged to face a coating surface of a medium, a coating liquid reservoir to which a coating liquid is supplied, and a coating liquid pool facing the die with the coating liquid. The slit which opens in the surface is formed, and a coating liquid is discharged to a medium from a slit by controlling supply of the coating liquid to a coating liquid pool. Intermittent coating device. 6. The intermittent coating apparatus according to claim 1, wherein the plurality of coating units are provided with a plurality of sets of the coating liquid reservoir and the slit independently on one die. . 7. The intermittent coating apparatus according to claim 1, wherein the plurality of coating units include a plurality of dies provided with the coating liquid reservoir and the slit. 8. The medium according to claim 1, wherein the medium is cut after forming a coating pattern to form a positive electrode member or a negative electrode member of a battery, and a non-coated region is used as a positive electrode terminal or a negative electrode terminal. 2. The intermittent coating device according to claim 1.