JP6257740B1 - Coating liquid supply device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To replace a filter device when the filter device is replaced when the defoamed coating solution is guided from the coating solution tank to the filter device to be purified and supplied from the liquid feeding device to the coating means. The air inside is appropriately removed so that the coating operation can be easily resumed in a short time. SOLUTION: When a coating liquid x defoamed in a plurality of coating liquid tanks 10A and 10B is purified by a filter device 50 and guided from a liquid feeding device 60 to a coating means 70, the filter device and the liquid feeding A communication passage 80 that communicates with each coating solution tank is provided between the device and the filter device is replaced while the coating solution is stopped from being guided to the filter device. The apparatus 20 was made to suck through the communication path and the coating liquid tank. [Selection] Figure 8

Description

  In the present invention, the coating liquid defoamed from the coating liquid tank is guided to a filter device for purification, the purified coating liquid is guided to the liquid feeding device, and supplied to the coating means by the liquid feeding device. The present invention relates to a coating liquid supply apparatus. In particular, using a plurality of coating liquid tanks, the defoamed coating liquid is sequentially guided from the coating liquid tank to the filter device to be purified, and the purified coating liquid is guided to the liquid feeding device, If the filter device is soiled when supplied to the coating means by the liquid delivery device and the filter device becomes dirty, the air in the replaced filter device is appropriately removed when the filter device is replaced. Thus, the present invention is characterized in that the coating operation can be easily resumed in a short time.

  Conventionally, Patent Document 1 discloses a coating liquid supply apparatus that supplies a coating liquid from a coating liquid tank to a coating means via a booster pump and a syringe pump.

  However, there is a possibility that the coating liquid led from the coating liquid tank may contain gels, bubbles, etc., and when such a coating liquid is supplied to the coating means and coating is performed, it is appropriate. There was a problem that it was impossible to perform proper coating.

  Further, in Patent Document 2, a coating liquid is guided from a coating liquid tank to a filter device, and foreign substances and bubbles of the coating liquid are grasped and purified by this filter device and supplied to the coating means. It is shown.

  Japanese Patent Application Laid-Open No. H10-228561 discloses a method in which a coating liquid is guided from a coating liquid tank to a filter device, and bubbles contained in the coating liquid are removed by evacuation.

  When the filter device is provided in this way, foreign matter such as gel accumulates in the filter device, so that it is necessary to replace the filter device.

  Here, when the filter device is replaced in this way, air exists in the replaced new filter device, and when this filter device is used as it is, the coating liquid supplied from the filter device to the coating means. There is a problem that air is mixed in to form air bubbles, and the coating is interrupted in the middle or unevenness occurs, resulting in a defective product.

  For this reason, conventionally, the coating liquid is continuously guided from the coating liquid tank to the filter apparatus until there are no bubbles in the coating liquid supplied from the filter apparatus to the coating means. I was trying to start coating.

  However, when a filtration filter such as fiber is used for the filter device, or when a coating liquid with high viscosity is used, bubbles are difficult to escape, and many bubbles are lost in the coating solution supplied from the filter device. There is a problem that the coating solution is consumed wastefully.

JP 2008-161770 A Japanese Patent Laying-Open No. 2015-66482 JP-A-1-88542

  In the present invention, the coating liquid defoamed from the coating liquid tank is guided to a filter device for purification, the purified coating liquid is guided to the liquid feeding device, and supplied to the coating means by the liquid feeding device. An object of the present invention is to solve the above-described problems in replacing the filter device in the coating liquid supply device.

  In particular, in the present invention, a plurality of coating liquid tanks are used, and the defoamed coating liquid is sequentially guided from the coating liquid tank to the filter device for purification, and the purified coating liquid is fed. When the filter device is soiled when it is guided to the device and supplied sequentially from the liquid feeding device to the coating means, the filter device is replaced with a new one in the replaced filter device. It is an object to appropriately remove air so that the above-described coating operation can be easily resumed in a short time.

  In the coating liquid supply apparatus according to the present invention, in order to solve the above-described problems, a plurality of coating liquid tanks for storing the coating liquid, and the inside of each coating liquid tank are vacuum-sucked and the coating liquid A vacuum suction device for defoaming the coating liquid stored in the tank, a filter device for purifying the coating liquid that has been defoamed and guided from each coating liquid tank, and purified by the filter device. A liquid supply device that supplies the applied liquid to the coating means, and the filter device is provided in a replaceable manner, and between the filter device and the liquid supply device. A communication path that communicates with the coating liquid tank, and the filter apparatus is replaced in a state in which the guiding of the coating liquid from the coating liquid tank to the filter apparatus is stopped. The vacuum mentioned above And so as to be sucked through said communication passage and the coating liquid tank by drawing device.

  And in this coating liquid supply apparatus, the communication path which connects a filter apparatus and a coating liquid tank is provided between a filter apparatus and a liquid feeding apparatus as mentioned above, and a coating liquid is supplied from a coating liquid tank. The filter device was exchanged in a state in which guiding to the filter device was stopped, and the exchanged filter device was exchanged in order to suck the inside of the exchanged filter device through the communication passage and the coating liquid tank by the vacuum suction device. Air in the filter device can be appropriately removed in a short time.

  In the coating liquid supply apparatus, the air in the replaced filter apparatus is evacuated by the vacuum suction apparatus through one coating liquid tank in a state where the guiding of the coating liquid to the filter apparatus is stopped. It is preferable to supply the coating liquid to the filter device from another coating liquid tank filled with the defoamed coating liquid.

  In this way, the air in the replaced filter device can be appropriately removed in a short time, and since there is no air in the replaced filter device, the defoamed coating liquid does not generate bubbles. It becomes possible to fill efficiently in a short time.

  Further, in the coating liquid supply apparatus, while supplying the coating liquid from another coating liquid tank filled with the coating liquid defoamed as described above to the filter apparatus, It is preferable that the coating liquid that has been defoamed is filled, and the excess coating liquid is supplied from the filter device to the one coating liquid tank through the communication path by the vacuum suction device.

  In this way, the defoamed coating solution can be sufficiently filled in the replaced filter device without generating bubbles, and the excess coating solution is removed from the filter device by the vacuum suction device. The liquid is directly supplied to one coating liquid tank, and the waste of the coating liquid is suppressed.

  In the coating liquid supply apparatus, it is preferable to use a syringe pump for the liquid feeding apparatus. When a syringe pump is used for the liquid feeding device in this way, even when the filter device is exchanged in a state where the guiding of the coating solution from the coating solution tank to the filter device is stopped as described above, If the coating liquid remains, the syringe pump is operated to supply the remaining coating liquid to the coating means so that the coating operation can be continued.

  In the coating liquid supply apparatus according to the present invention, as described above, a communication path is provided between the filter apparatus and the liquid feeding apparatus to communicate the filter apparatus and the coating liquid tank, and the coating liquid is supplied from the coating liquid tank. The filter device was exchanged in a state in which guiding to the filter device was stopped, and the air in the exchanged filter device was sucked by the vacuum suction device through the communication path and the coating liquid tank. The air in the replaced filter device can be appropriately removed in a short time.

  As a result, in the coating liquid supply apparatus of the present invention, the air in the replaced filter device is appropriately removed in a short time, and the defoamed coating liquid is removed from the air in the replaced filter apparatus. The filling operation can be performed quickly without causing the coating to be interrupted in the middle of the coating or causing unevenness as in the prior art, thereby eliminating the need for a product. In addition, the coating operation can be efficiently and easily resumed without wasting the coating solution.

The coating liquid supply apparatus which concerns on one Embodiment of this invention is shown, A 1st coating liquid tank is used as a some coating liquid tank using a 1st coating liquid tank and a 2nd coating liquid tank It is the schematic explanatory drawing which showed the state which purify | cleans the coating liquid defoamed from the above with a filter apparatus, supplies the purified coating liquid to a coating means with a liquid feeding apparatus, and performs coating. In the coating liquid supply apparatus according to the above-described embodiment, the coating liquid defoamed from the second coating liquid tank is purified by the filter device, and the purified coating liquid is coated by the liquid feeding apparatus. It is the schematic explanatory drawing which showed the state which supplies a coating liquid in the 1st coating liquid tank, while supplying to a coating. In the coating liquid supply apparatus according to the above embodiment, when the filter apparatus is replaced with a new filter apparatus, the amount of the coating liquid filled in the first coating liquid tank is a predetermined amount or less. FIG. In the coating liquid supply apparatus according to the above-described embodiment, a state in which the deteriorated filter device is removed in a state where the amount of the coating liquid filled in the first coating liquid tank is equal to or less than a predetermined amount is shown. It is a schematic explanatory drawing. In the coating liquid supply apparatus which concerns on the said embodiment, it is the schematic explanatory drawing which showed the state which attached the new filter apparatus to the part which removed the deteriorated filter apparatus. In the coating liquid supply apparatus according to the above-described embodiment, the air in the newly installed filter device is guided into the first coating liquid tank through the communication path by the vacuum suction device, and the inside of the first coating liquid tank It is the schematic explanatory drawing which showed the state attracted | sucked with the air. In the coating liquid supply apparatus according to the above-described embodiment, the air in the newly installed filter device is guided into the first coating liquid tank and sucked together with the air in the first coating liquid tank. A schematic explanatory view showing a state in which the defoamed coating liquid in the second coating liquid tank is supplied to the filter device. In the coating liquid supply apparatus according to the embodiment, the defoamed coating liquid in the second coating liquid tank is supplied to the filter apparatus, and the coating liquid is supplied into the filter apparatus. It is the schematic explanatory drawing which showed the state which is made to fill and supplies an excess coating liquid in a 1st coating liquid tank through the said communicating path. In the coating liquid supply apparatus according to the above-described embodiment, a surplus coating liquid is supplied into the first coating liquid tank through the communication path, and a predetermined amount of defoaming treatment is performed in the first coating liquid tank. It is the schematic explanatory drawing which showed the state in which the applied coating liquid was accommodated. In the coating liquid supply apparatus according to the above-described embodiment, as described above, the defoamed coating liquid in the first coating liquid tank is purified by the filter device, and the purified coating liquid is fed. It is the schematic explanatory drawing which showed the state which supplies a coating liquid in a 2nd coating liquid tank while supplying to a coating means with an apparatus. In the coating liquid supply apparatus according to the above-described embodiment, as described above, the defoamed coating liquid in the first coating liquid tank is purified by the filter device, and the purified coating liquid is fed. It is the schematic explanatory drawing which showed the state which accommodated the predetermined amount defoaming coating liquid in the 2nd coating liquid tank, supplying to a coating means with an apparatus. In the coating liquid supply apparatus which concerns on the said embodiment, it is the schematic explanatory drawing which showed the example which used the syringe pump for the liquid feeding apparatus.

  Hereinafter, a coating liquid supply apparatus according to an embodiment of the present invention will be specifically described with reference to the accompanying drawings. In addition, the coating liquid supply apparatus which concerns on this invention is not limited to what was shown to the following embodiment, In the range which does not change the summary of invention, it can change suitably and can implement.

  Here, in the coating liquid supply apparatus in this embodiment, as shown in the accompanying drawings, the first coating liquid tank 10A and the second coating liquid tank are used as a plurality of coating liquid tanks for storing the coating liquid x. Two coating liquid tanks 10A and 10B including the working liquid tank 10B are used.

  The vacuum suction device 20 for sucking the air in the coating liquid tanks 10A and 10B is attached to the upper part of the coating liquid tanks 10A and 10B by the suction pipe 21, and the coating liquid tanks 10A and 10B. The first and second on-off valves 22a and 22b are provided in the portion of the suction pipe 21 attached to the air, and the air in the coating liquid tanks 10A and 10B is vacuum-sucked with the on-off valves 22a and 22b opened. The apparatus 20 sucks the coating liquid x stored in the coating liquid tanks 10 </ b> A and 10 </ b> B and performs a defoaming process.

  Further, a compressor 30 for supplying compressed air into the coating liquid tanks 10A and 10B is attached to the upper part of the coating liquid tanks 10A and 10B by an air pipe 31, and is attached to the coating liquid tanks 10A and 10B. First and second on-off valves 32a and 32b are provided in the portion of the air pipe 31 to be attached, and compressed air is supplied into the coating liquid tanks 10A and 10B with the on-off valves 32a and 32b being opened. I am doing so.

  The first and second coating liquid supply devices 40a and 40b for supplying the coating liquid x into the coating liquid tanks 10A and 10B are respectively connected to the first and second supply pipes 41a and 41b. The first and second on-off valves 42a and 42b are provided at the portions of the supply pipes 41a and 41b attached to the coating liquid tanks 10A and 10B, respectively, and attached to the upper portions of the coating liquid tanks 10A and 10B. The coating liquid x is supplied from the coating liquid supply devices 40a and 40b into the corresponding coating liquid tanks 10A and 10B with the on-off valves 42a and 42b opened.

  In addition, the coating liquid x subjected to defoaming treatment in the coating liquid tanks 10A and 10B is sent to the filter device 50 provided in a replaceable manner at the bottoms of the coating liquid tanks 10A and 10B. 1 and the second liquid feeding pipes 11a and 11b are provided, and the liquid feeding pipes 11a and 11b are provided with on-off valves 12a and 12b, respectively, and the first and second liquid feeding pipes join together. An on-off valve 12c is also provided between 11c and the filter device 50. Then, the on-off valves 12a and 12b in either of the first and second liquid feeding pipes 11a and 11b are opened, and the on-off valve 12c in the merging liquid feeding pipe 11c is opened to open the coating liquid tanks 10A and 10B. The defoamed coating liquid x is supplied to the filter device 50, and the filter device 50 purifies the coating liquid x.

  Further, an opening / closing valve 52 is provided in the guide pipe 51 that guides the coating liquid x purified by the filter device 50 to the liquid feeding device 60, and the coating liquid x purified by opening the opening / closing valve 52 is supplied to the liquid feeding device 60. The coating liquid x purified from the liquid feeding device 60 is guided to the coating means 70, and the coating liquid x is applied to an object to be coated (not shown) by the coating means 70. I am doing so.

  Moreover, in the coating liquid supply apparatus in this embodiment, the part of the guide pipe 51 at a position upstream of the opening / closing valve 52 is communicated with the upper part of the coating liquid tanks 10A and 10B. A communication passage 80 is provided, and a branching on-off valve 81a is provided on a portion of the communication passage 80 on the guide pipe 51 side, and on-off valves 81b, 81c are provided at portions communicating with the upper portions of the coating liquid tanks 10A, 10B. I am trying to provide it.

  And in the coating liquid supply apparatus in this embodiment, the filter apparatus removes the coating liquid x which has been defoamed in order from the first coating liquid tank 10A and the second coating liquid tank 10B. 50, and the purified coating liquid x is supplied from the filter device 50 to the coating means 70 by the liquid feeding device 60 for coating. In the attached drawings, regarding the opening and closing of the on-off valves 22a, 22b,..., The open state is shown in white and the closed state is shown in black.

  Here, as shown in FIG. 1, the first coating liquid tank 10A and the second coating liquid tank 10B are filled with the defoaming coating liquid x, and the first coating liquid tank 10A is filled with the first coating liquid tank 10A. In supplying the coating liquid x filled in the liquid tank 10A to the coating means 70, the air pipe 31 in the compressor 30 for supplying compressed air is provided in the first coating liquid tank 10A. Then, the first on-off valve 32a is opened, and the compressed air from the compressor 30 is supplied into the first coating liquid tank 10A. Further, the on-off valve 12a provided on the first liquid supply pipe 11a provided on the bottom of the first coating liquid tank 10A and the on-off valve 12c provided on the merging liquid supply pipe 11c are opened, The defoamed coating liquid x in the first coating liquid tank 10A is guided to the filter device 50 by the force of compressed air from the air pipe 31 for purification. Then, the on-off valve 52 provided on the guide pipe 51 that guides the coating liquid x purified by the filter device 50 to the liquid feeding device 60 is opened, and the coating liquid x purified by the filter device 50 is fed. The coating liquid x guided to the liquid device 60 and supplied from the liquid feeding device 60 is supplied to the coating means 70 for coating.

  In addition, as a result of supplying the coating liquid x filled in the first coating liquid tank 10A to the coating means 70 in this way, the first coating liquid tank 10A filled with the first coating liquid x is filled. When the amount of the coating liquid x is equal to or less than a predetermined amount, as shown in FIG. 2, in the air pipe 31, the first opening / closing provided in the portion of the first coating liquid tank 10A While closing the valve 32a, the on-off valve 12a in the 1st liquid feeding pipe 11a provided in the bottom part of the 1st coating liquid tank 10A is closed, The said coating liquid x in the 1st coating liquid tank 10A Is not led to the filter device 50.

  On the other hand, in the air pipe 31, the second on-off valve 32b provided in the portion of the second coating liquid tank 10B is opened, and the air compressed from the compressor 30 is supplied to the second coating liquid tank 10B. The on-off valve 12b provided on the second liquid supply pipe 11b provided at the bottom of the second coating liquid tank 10B is opened, and the on-off valve 12c is opened. The defoamed coating liquid x in the second coating liquid tank 10B is guided to the filter device 50 through the liquid feeding pipe 11c to be purified, and the thus purified coating liquid x is converted into the above-described purified coating liquid x. In this way, the coating liquid x is guided to the liquid feeding device 60 and supplied from the liquid feeding device 60 to the coating means 70 for coating.

  Further, in the coating liquid supply apparatus in this embodiment, as shown in FIG. 2, the first coating liquid x is supplied from the second coating liquid tank 10B to the coating means 70 and simultaneously with the first coating liquid 70. The first on-off valve 42a provided on the first supply pipe 41a between the working liquid supply device 40a and the first coating liquid tank 10A is opened, and the coating liquid is supplied from the first coating liquid supply device 40a. x is supplied to the first coating liquid tank 10A, and the first on-off valve 22a provided on the suction pipe 21 between the vacuum suction device 20 and the first coating liquid tank 10A is opened, Air in the first coating liquid tank 10A is sucked by the vacuum suction device 20, and the coating liquid x supplied into the first coating liquid tank 10A is defoamed.

  Then, the above-described operation is alternately repeated for the first coating liquid tank 10A and the second coating liquid tank 10B, and the first coating liquid tank 10A and the second coating liquid are used. The coating liquid x that has been defoamed in order from the tank 10B is guided to the filter device 50 for purification, and the purified coating liquid x is supplied from the filter device 50 to the coating means 70 by the liquid feeding device 60. And I try to do the coating.

  Also, the coating liquid x that has been degassed in order from the first coating liquid tank 10A and the second coating liquid tank 10B in this way is purified by the filter device 50, and the purified coating liquid is purified. When x is supplied from the filter device 50 to the coating means 70 by the liquid feeding device 60 and coating is performed, the filter device 50 is deteriorated. When the filter device 50 is replaced with a new filter device 50, for example, As shown in FIG. 4, when the filter device 50 is replaced in a state where the amount of the coating liquid x filled in the first coating liquid tank 10A is equal to or less than a predetermined amount, as shown in FIG. The first on-off valve 32a provided in the air pipe 31 between the compressor 30 and the first coating liquid tank 10A is closed and the first coating liquid tank 10A is provided at the bottom. 1's The on-off valve 12a in the liquid pipe 11a is closed so that the coating liquid x in the first coating liquid tank 10A is not guided to the filter device 50. In this state, the deteriorated filter device 50 is shown in FIG. It is made to remove from the liquid feeding pipe 11a.

  A sealing joint (not shown) such as a coupler (registered trademark) may be used at the removed portion so that the coating liquid x does not leak from the liquid feeding pipe 11a.

  Thereafter, as shown in FIG. 5, a new filter device 50 is mounted. Note that the coating liquid x does not exist in the new filter device 50 mounted in this manner, and air is contained in the filter member such as fibers housed in the filter device 50, although not shown. It is in the state.

  And in the coating liquid supply apparatus in this embodiment, after attaching the new filter apparatus 50 as mentioned above, as shown in FIG. 6, the said vacuum suction apparatus 20 and the 1st coating liquid tank 10A. The first on-off valve 22a provided on the suction pipe 21 between the two is opened, and the air in the first coating liquid tank 10A is sucked by the vacuum suction device 20 and provided in the communication path 80. The opening / closing valve 81a for branching and the opening / closing valve 81b provided at a portion where the communication path 80 communicates with the upper portion of the first coating liquid tank 10A are opened and accommodated in the filter device 50. The air contained in the filter member such as fiber is guided to the first coating liquid tank 10A through the communication path 80 by the vacuum suction device 20 and together with the air in the first coating liquid tank 10A. Suction So as to.

  Further, the air in the filter device 50 is guided to the first coating liquid tank 10A through the communication path 80 by the vacuum suction device 20 in this way, and together with the air in the first coating liquid tank 10A. 7, in the air pipe 31, the second on-off valve 32 b provided in the portion of the second coating liquid tank 10 </ b> B is opened and compressed from the compressor 30 as shown in FIG. 7. While supplying air into the 2nd coating liquid tank 10B, the on-off valve 12b in the 2nd liquid feeding pipe 11b provided in the bottom part of the 2nd coating liquid tank 10B, and the on-off valve in the merging liquid feeding pipe 11c 12c is opened, and the defoaming coating liquid x in the second coating liquid tank 10B is supplied into the replaced filter device 50.

  Then, by continuing such an operation, as shown in FIG. 8, the defoamed coating liquid x in the second coating liquid tank 10B is filled in the replaced filter device 50, and the filter The surplus coating liquid x overflowing from the inside of the apparatus 50 is sucked into the first coating liquid tank 10A through the communication path 80 by the vacuum suction device 20, and surplus in the first coating liquid tank 10A. Supply coating liquid x. The coating liquid x is already defoamed, but at this time, there is a possibility that bubbles may be mixed with the air remaining in the first coating liquid tank 10A. On the other hand, here, the coating liquid x in the first coating liquid tank 10A can be defoamed together with the air in the first coating liquid tank 10A.

  In this way, the surplus coating liquid x is supplied into the first coating liquid tank 10A, and the coating in the first coating liquid tank 10A is performed together with the air in the first coating liquid tank 10A. When the liquid x is defoamed and a predetermined amount of defoamed coating liquid x is contained in the first coating liquid tank 10A, as shown in FIG. The second on-off valve 32b provided in the second coating liquid tank 10B, the on-off valve 12b provided on the second liquid feeding pipe 11b at the bottom of the second coating liquid tank 10B, The on-off valve 12c provided in the liquid pipe 11c is closed so that the coating liquid x in the second coating liquid tank 10B is not guided to the filter device 50, and the branch passage provided with the communication path 80 is provided. Open / close valve 81a, communication passage 80 and first coating liquid tank 1 The on-off valve 81b provided at the communication portion with the upper part of A is closed, and the first on-off valve 22a provided on the suction pipe 21 between the vacuum suction device 20 and the first coating liquid tank 10A is closed. Try to close. In this case, the defoaming coating liquid x in the second coating liquid tank 10B is reduced.

  In addition, a predetermined amount of defoamed coating liquid x is accommodated in the first coating liquid tank 10A in this manner, while the defoamed coating in the second coating liquid tank 10B. When the amount of the liquid x decreases, as shown in FIG. 10, as shown in FIG. 1, the first coating liquid tank 10 </ b> A provided in the portion of the air pipe 31 is provided. The on-off valve 32a is opened to supply the compressed air from the compressor 30 into the first coating liquid tank 10A, and the first liquid supply pipe 11a provided at the bottom of the first coating liquid tank 10A. The on-off valve 12a in the first and second on-off valves 12c in the merging and feeding pipe 11c are opened, and the defoamed coating liquid x in the first coating liquid tank 10A is guided to the filter device 50 to be purified. The coating liquid x purified to The on-off valve 52 provided in the guide pipe 51 that leads from the catalyst device 50 to the liquid feeding device 60 is opened to guide the purified coating liquid x to the liquid feeding device 60, and the coating that has been purified from the liquid feeding device 60. The liquid x is supplied to the coating means 70 to perform coating.

  On the other hand, in the second coating liquid tank 10B in which the amount of the coating liquid x defoamed as described above is reduced, as shown in FIG. The second on-off valve 42b provided on the second supply pipe 41b between the second coating liquid tank 10B and the second coating liquid tank 10B is opened, and the second coating liquid x is supplied from the second coating liquid supply device 40b. While supplying to the liquid tank 10B, the 2nd on-off valve 22b provided in the suction pipe 21 between the said vacuum suction apparatus 20 and the 2nd coating liquid tank 10B is opened, and 2nd by the vacuum suction apparatus 20 The air in the coating liquid tank 10B is sucked, and the defoaming process is performed while dropping the coating liquid x supplied into the second coating liquid tank 10B.

  Then, when a predetermined amount of defoamed coating liquid x is stored in the second coating liquid tank 10B as described above, as shown in FIG. The defoamed coating solution x in the coating solution tank 10A is guided to the filter device 50 for purification, and the thus-purified coating solution x is applied by the liquid feeding device 60 from the filter device 50. The second on-off valve provided on the second supply pipe 41b between the second coating liquid supply device 40b and the second coating liquid tank 10B 42b is closed so that the coating liquid x is not supplied from the second coating liquid supply device 40b to the second coating liquid tank 10B, and the vacuum suction device 20 and the second coating liquid tank 10B The second on-off valve 22 provided in the suction pipe 21 between Close to the.

  Thereafter, the coating liquid x, which was defoamed in order from the first coating liquid tank 10A and the second coating liquid tank 10B as described above, was purified by the filter device 50 and purified. The coating liquid x is supplied from the filter device 50 to the coating means 70 by the liquid feeding device 60 to perform coating, and when the filter device 50 deteriorates, it is replaced with a new filter device 50 as described above. Like that.

  In addition, although the said liquid feeding apparatus 60 used in the coating liquid supply apparatus in the said embodiment is not specifically limited, as shown in FIG. 12, as this liquid feeding apparatus 60, while using the syringe pump 61, this syringe pump The first opening / closing valve 62 provided on the guide pipe 51 side in 61 and the second opening / closing valve 63 provided on the coating means 70 side can be used.

  In such a liquid feeding device 60, since the coating liquid x exists in the syringe pump 61, when the filter device 50 is replaced as described above, the on-off valve in the guide pipe 51 is used. 52 is closed and the first liquid on the guide pipe 51 side is closed while the first on-off valve 62 on the guide pipe 51 side is closed. By operating the syringe pump 61 with the second on-off valve 63 opened, the coating liquid x existing in the syringe pump 61 is guided to the coating means 70 and the coating operation is continued. Will be able to do.

  In this embodiment, the two coating liquid tanks 10A and 10B have been described. However, the number of coating liquid tanks may be three or more. In this case, an arbitrary tank can be selected and the same operation can be performed.

  In FIG. 6, a heater (not shown) may be attached to the outer periphery of the replaced filter device 50 and energized to heat the air in the filter device 50. As a result, the volume of the air expands and the air can be extracted to the back of the fiber of the filter member. After that, the energization of the heater is stopped, the temperature is cooled to room temperature, and then the on-off valves 12b and 12c are opened as shown in FIG. By doing so, the volume of air is reduced and the effect of vacuum suction is further obtained, and the supply of the coating liquid x into the filter device 50 can be performed smoothly.

10A 1st coating liquid tank 10B 2nd coating liquid tank 11a 1st liquid feeding pipe, 11b 2nd liquid feeding pipe, 11c Merge liquid feeding pipes 12a, 12b, 12c On-off valve 20 Vacuum suction device 21 Suction Pipe 22a 1st on-off valve, 22b 2nd on-off valve 30 Compressor 31 Air pipe 32a 1st on-off valve, 32b 2nd on-off valve 40a 1st coating liquid supply apparatus, 40b 2nd coating liquid replenishment Device 41a First supply pipe, 41b Second supply pipe 42a First on-off valve, 42b Second on-off valve 50 Filter device 51 Guide pipe 52 On-off valve 60 Liquid feeding device 61 Syringe pump 62 First on-off valve 63 Second on-off valve 70 Coating means 80 Communication passages 81a, 81b, 81c On-off valve x Coating liquid

Claims (4)

  A plurality of coating liquid tanks for storing the coating liquid, a vacuum suction device for vacuuming the inside of each coating liquid tank and defoaming the coating liquid stored in the coating liquid tank, and a defoaming process A coating liquid comprising: a filter device that purifies the coating liquid guided from each coating liquid tank; and a liquid feeding device that supplies the coating liquid purified by the filter device to the coating means. In the supply device, the filter device is provided in a replaceable manner, and a communication passage is provided between the filter device and the liquid feeding device to communicate with the coating solution tank, and the coating solution tank is provided. The filter device is exchanged in a state where guiding of the coating liquid from the filter device to the filter device is stopped, and the exchanged filter device is sucked by the vacuum suction device through the communication path and the coating solution tank. Features that let you Coating liquid supply apparatus.   2. The coating liquid supply apparatus according to claim 1, wherein the vacuum suction is performed in the exchanged filter apparatus through one coating liquid tank in a state in which guiding of the coating liquid to the filter apparatus is stopped. While being sucked by the apparatus, the coating liquid is supplied from the other coating liquid tank filled with the defoamed coating liquid to the filter device.   3. The coating liquid supply apparatus according to claim 2, wherein the coating liquid is supplied to the filter device from another coating liquid tank filled with the defoamed coating liquid, and is removed into the filter device. A coating liquid supply device that fills a foam-treated coating liquid and supplies the excess coating liquid from the filter device to the one coating liquid tank through the communication path by a vacuum suction device. . The coating liquid supply apparatus according to any one of claims 1 to 3, wherein the liquid feeding apparatus is a syringe pump.

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