Coating Equipment

Abstract

To provide a coating device which can prevent a damage of a regulator even if an overflown coating liquid flows backward through an air flow passage.SOLUTION: A coating device 1 of a coating liquid includes a booster relay 10, a regulator 20 for adjusting the pressure of compression air supplied from an air source, and a pressure feed tank 30 for holding the coating liquid, wherein the booster relay includes a first input port P1 to which compression air Air1 that is supplied from the regulator and whose the pressure is adjusted, a second input port P2 to which compression air Air2 supplied from the air source is input, an output port P3 which communicates with the second input port through a first through hole H15 and is connected to the pressure feed tank, and discharge ports P4 and P5 which communicate with the output port through a second through hole H12.SELECTED DRAWING: Figure 1

Description

[Technical field]

[0001] The present invention relates to a coating device. [Background technology]

[0002] 2. Description of the Related Art There is known a coating device that performs die coating by pressure-feeding a coating liquid held in a tank using a pump (see, for example, Patent Document 1).

[0003] Here, a pressure tank may be used instead of a tank and a pump, and compressed air may be supplied to the pressure tank via an air flow path to apply pressure to the pressure tank, thereby sending (pressurizing) the coating liquid (e.g., a paste-like liquid) in the pressure tank to the coating means. In this case, the pressure of the compressed air supplied to the pressure tank via the air flow path is adjusted by a regulator, and the reduced coating liquid is replenished to the pressure tank as needed. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] JP 2018-094507 A Summary of the Invention [Problem to be solved by the invention]

[0005] However, when a pressure tank is used instead of a tank and a pump as described above, if the coating liquid is replenished in excess of the capacity of the pressure tank for some reason, an overflow occurs, and the overflowed coating liquid flows back through the air flow path, which may damage the regulator.

[0006] The present invention has been made to solve such problems, and provides a coating device that can prevent damage to the regulator even if overflowing coating liquid flows back through the air flow path. [Means for solving the problem]

[0007] The coating device according to the present invention comprises: A coating device for a coating liquid, Booster relay and a regulator connected to an air source via a first flow path and configured to adjust a pressure of compressed air supplied from the air source; A pressure tank for holding a coating liquid, The booster relay is a first input port connected to the regulator via a second flow path and receiving pressure-regulated compressed air from the regulator; a second input port connected to the air source via a third flow path and receiving compressed air from the air source; an output port communicating with the second input port via a first through hole and connected to the pressure tank via a fourth flow path; an exhaust port communicating with the output port via a second through hole; a first valve that opens the first through hole when the pressure on the first input port side is greater than the pressure on the output port side, and closes the first through hole when the pressure on the first input port side is less than the pressure on the output port side; a second valve that closes the second through hole when the pressure on the first input port side is greater than the pressure on the output port side, and opens the second through hole when the pressure on the first input port side is less than the pressure on the output port side, the pressure tank is connected to a coating means via a fifth flow path and to a reserve tank via a sixth flow path; compressed air is supplied from the output port through the fourth flow path to the pressure-feed tank, and pressure is applied to the pressure-feed tank, whereby the coating liquid in the pressure-feed tank is fed to the coating means through the fifth flow path; the pressure tank is replenished with the coating liquid from the reserve tank via the sixth flow path to compensate for the decrease in the coating liquid; When the coating liquid flows back from the pressure feed tank through the fourth flow path and the pressure on the first input port side becomes less than the pressure on the output port side, the backflowing coating liquid is supplied to the discharge port side through the second through hole and discharged from the discharge port.

[0008] With this configuration, it is possible to provide a coating device that can prevent the regulator from being damaged even if the overflowing coating liquid flows back through the air flow path.

[0009] This is because the coating liquid that overflows and flows back through the air flow path enters the booster relay before reaching the regulator, and is discharged from the discharge port of the booster relay.

[0010] The coating device may further include a leakage sensor that detects the coating liquid discharged from the discharge port.

[0011] In the coating device, the backflowing coating liquid may be the coating liquid that has been replenished in excess of the capacity of the pressure tank and has caused an overflow. Effect of the Invention

[0012] According to the present invention, it is possible to provide a coating device that can prevent damage to the regulator even if the overflowing coating liquid flows back through the air flow path. [Brief description of the drawings]

[0013] [Figure 1] FIG. 1 is a schematic configuration diagram of a coating device 1. [Diagram 2] 4 is a flowchart of an operation example (normal operation example) of the coating device 1. [Diagram 3] 4 is a flowchart of an operation example (an operation example when an overflow occurs) of the coating device 1. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0014] Hereinafter, a coating device according to an embodiment of the present invention will be described with reference to the accompanying drawings. In each drawing, corresponding components are given the same reference numerals, and duplicated explanations will be omitted.

[0015] FIG. 1 is a schematic diagram of a coating device 1.

[0016] The coating device 1 according to the present embodiment is a coating device for coating a coating liquid, for example, a coating device for coating an insulating paste for a Li-ion battery. The coating liquid is a paste-like liquid, for example, a slurry.

[0017] As shown in FIG. 1, the coating device 1 mainly includes a booster relay 10, a regulator 20 connected to an air source (not shown) via a first flow path A1 (air flow path) and adjusting the pressure of compressed air supplied from the air source, a pressure tank 30 that holds the coating liquid 31, and leakage sensors SE1 and SE2.

[0018] The booster relay 10 mainly includes a first input port P1 connected to the regulator 20 via a second flow path A2 (air flow path) and receiving the pressure-adjusted compressed air Air1 supplied from the regulator 20, a second input port P2 connected to an air source (not shown) via a third flow path A3 (air flow path branched from the first flow path A1) and receiving the compressed air Air2 supplied from the air source, and a first through hole H 15 and an output port P3 connected to the pressure tank 30 via a fourth flow path A4 (air flow path). 12 When the pressure on the first input port P1 side is greater than the pressure on the output port P3 side, the first through hole H 15 On the other hand, when the pressure on the first input port P1 side is less than the pressure on the output port P3 side, the first through hole H 15 When the pressure on the first input port P1 side is greater than the pressure on the output port P3 side, the second through hole H 12 On the other hand, when the pressure on the first input port P1 side is less than the pressure on the output port P3 side, the second through hole H 12The booster relay 10 also includes an input chamber S1, a first diaphragm 11, a second diaphragm 12, and a spring 16. The first through hole H 15 The second through hole H is formed in the wall portion 15 that separates the space S2 on the second input port P2 side from the space S3 on the output port P3 side. 12 is formed in the second diaphragm 12.

[0019] The regulator 20 is an electro-pneumatic regulator that is connected to an air source (not shown) via a first flow path A1 and adjusts the pressure of the compressed air supplied from the air source to a pressure required for the desired amount of coating liquid delivery under control of a control device (not shown).

[0020] The pressure feed tank 30 is a sealed tank that holds the coating fluid 31 .

[0021] The pressure-feed tank 30 is connected to a coating means (not shown) via a fifth flow path A5, and is also connected to a spare tank (not shown) via a sixth flow path A6.

[0022] Compressed air Air2 is supplied from output port P3 through the fourth flow path A4 to the pressure feed tank 30, applying pressure to the pressure feed tank 30, causing the coating liquid 31 in the pressure feed tank 30 to be sent (pressurized) to the coating means through the fifth flow path A5.

[0023] Furthermore, the pressure feed tank 30 is replenished with the coating liquid 31 from a reserve tank via a sixth flow path A6 as needed to make up for a decrease in the amount of the coating liquid 31.

[0024] Next, an operation example (normal operation example) of the coating device 1 having the above configuration will be described.

[0025] FIG. 2 is a flowchart of an operation example (normal operation example) of the coating device 1.

[0026] First, compressed air Air1 is input to the first input port P1 (step S10). Specifically, the pressure-regulated compressed air Air1 supplied from the regulator 20 is input to the first input port P1. The compressed air Air1 input to this first input port P1 is input to the input chamber S1. As a result, the pressure on the first input port P1 side is greater than the pressure on the output port P3 side, so that the first diaphragm 11 and the second diaphragm 12 are pushed down. In addition, the second diaphragm 12 (second through hole H) that is pushed down is compressed to the input chamber S1. 12 The second through hole H 12 is closed (step S11).

[0027] In addition, the second diaphragm 12 (the second through hole H 12 When the first valve 13 is further pressed down while the first valve 13 is in contact with the second valve 14, the first valve 13 connected to the second valve 14 via the connecting portion 17 is pressed down while elastically deforming the spring 16. As a result, the first through hole H 15 As a result, the space S2 on the first input port P1 side and the space S3 on the output port P3 side are opened through the first through hole H. 15 The communication is via.

[0028] Next, the compressed air Air2 input to the second input port P2 flows through the first through hole H 15 to the output port P3 (step S12).

[0029] Next, the compressed air Air2 output from the output port P3 is supplied to the pressure-feeding tank 30 (step S13). Specifically, the compressed air Air2 output from the output port P3 is supplied to the pressure-feeding tank 30 via the fourth flow path A4.

[0030] Next, the coating fluid 31 in the pressure-feeding tank 30 is sent (pressurized) to the coating means (step S14). Specifically, compressed air Air2 is supplied from the output port P3 through the fourth flow path A4 to the pressure-feeding tank 30, and pressure is applied to the pressure-feeding tank 30, whereby the coating fluid 31 in the pressure-feeding tank 30 is sent (pressurized) to the coating means through the fifth flow path A5.

[0031] Next, the reduced amount of coating liquid 31 is replenished to the pressure-feed tank 30 (step S15). Specifically, the reduced amount of coating liquid 31 is replenished from the spare tank to the pressure-feed tank 30 via the sixth flow path A6 as needed.

[0032] In the normal state, the above-mentioned processes of steps S10 to S15 are repeatedly executed. Note that the normal state refers to a case where the pressure on the first input port P1 side is greater than the pressure on the output port P3 side.

[0033] Next, an example of operation of the coating device 1 having the above configuration (an example of operation when an overflow occurs) will be described.

[0034] FIG. 3 is a flowchart of an operation example of the coating device 1 (an operation example when an overflow occurs).

[0035] First, overflow will be described. When the coating fluid 31 is replenished to the pressure-feed tank 30 beyond the capacity of the pressure-feed tank 30 due to some cause (e.g., erroneous detection of the liquid level in the pressure-feed tank, the coating fluid 31 in the pressure-feed tank 30 becoming low in viscosity, the pressure in the regulator 20 decreasing, or the liquid feed from the spare tank not stopping), an overflow occurs, and the overflowed coating fluid 31 may flow back to the output port P3 via the fourth flow path A4 (air flow path).

[0036] During the processing of steps S10 to S15 (see FIG. 2), if the coating liquid 31 flows back and the pressure on the first input port P1 side becomes lower than the pressure on the output port P3 side (step S20: YES), the first diaphragm 11 and the second diaphragm 12 are pushed up, and the second diaphragm 12 (the second through hole H 12 The second through hole H 12 As a result, the space S3 on the output port P3 side and the space S4 on the exhaust ports P4 and P5 side are connected to the second through hole H 12 The communication is via.

[0037] In addition, the first valve 13 is pushed up by the spring 16 and penetrates the first through hole H 15 By abutting against the surroundings, the first through hole H 15 is closed (step S21).

[0038] Next, the coating liquid 31 that has flowed back as described above enters the second through hole H 12 The coating liquid 31 is supplied to the space S4 on the discharge port P4, P5 side through the oil pan (not shown) and discharged from the discharge port P4, P5 (step S22), received in an oil pan (not shown), detected by the liquid leakage sensors SE1, SE2 (step S23: YES), and a predetermined process is executed (step S24). The predetermined process is, for example, a process of notifying the occurrence of an overflow (or backflow) and a process of stopping the supply of the coating liquid 31 from the reserve tank to the pressure-feed tank 30. On the other hand, when the coating liquid 31 discharged from the discharge port P4, P5 is not detected by the liquid leakage sensors SE1, SE2 (step S23: NO), the processes from step S20 onwards are repeatedly executed. Note that the liquid leakage sensors SE1, SE2 may be provided in the oil pan, the discharge port P4, P5, or other locations as long as they can detect the coating liquid 31 discharged from the discharge port P4, P5.

[0039] As described above, according to this embodiment, a coating device 1 can be provided that can prevent damage to the regulator 20 even if the overflowing coating liquid 31 flows back through the fourth flow path A4 (air flow path).

[0040] This is because the coating liquid 31 that overflows and flows back through the fourth flow path A4 enters the booster relay 10 before reaching the regulator 20, and is discharged from the discharge ports P4 and P5 of the booster relay 10.

[0041] Furthermore, according to this embodiment, since the liquid leakage sensors SE1 and SE2 are provided, it becomes possible to quickly and easily find an abnormality (overflow, backflow).

[0042] All the numerical values ​​shown in the above embodiment are merely examples, and it goes without saying that other appropriate numerical values ​​can be used.

[0043] The above-described embodiment is merely an example in all respects. The present invention should not be construed as being limited by the description of the above-described embodiment. The present invention can be implemented in various other forms without departing from the spirit or main characteristics thereof. [Explanation of symbols]

[0044] 1... Coating device 10…Booster relay 11...First diaphragm 12...Second diaphragm 13...First valve 14...Second valve 15...Wall part 16…Spring 20…Regulator 30…Pressure tank A1: First flow path A2: Second flow path A3: Third flow path A4…Fourth flow path A5…5th flow path A6: 6th flow path Air1, Air2...Compressed air H 15 …First through hole H 12 …Second through hole P1: First input port P2: Second input port P3…Output port P4, P5…Exhaust port S1…Input room S2~S4…Space SE1, SE2...Leakage sensors

Claims

1. A coating device for a coating liquid, Booster relay and a regulator connected to an air source via a first flow path and configured to adjust a pressure of compressed air supplied from the air source; A pressure tank for holding a coating liquid, The booster relay is a first input port connected to the regulator via a second flow path and receiving pressure-adjusted compressed air supplied from the regulator; a second input port connected to the air source via a third flow path and receiving compressed air from the air source; an output port communicating with the second input port via a first through hole and connected to the pressure feed tank via a fourth flow path; an exhaust port communicating with the output port via a second through hole; a first valve that opens the first through hole when the pressure on the first input port side is greater than the pressure on the output port side, and closes the first through hole when the pressure on the first input port side is less than the pressure on the output port side; a second valve that closes the second through hole when the pressure on the first input port side is greater than the pressure on the output port side, and opens the second through hole when the pressure on the first input port side is less than the pressure on the output port side, the pressure tank is connected to a coating means via a fifth flow path and to a reserve tank via a sixth flow path; compressed air is supplied from the output port through the fourth flow path to the pressure-feed tank, and pressure is applied to the pressure-feed tank, whereby the coating liquid in the pressure-feed tank is fed to the coating means through the fifth flow path; the pressure tank is replenished with the coating liquid from the reserve tank via the sixth flow path to compensate for the decrease in the coating liquid; A coating device in which, when the coating liquid flows back from the pressure tank through the fourth flow path and the pressure on the first input port side becomes less than the pressure on the output port side, the backflowing coating liquid is supplied to the discharge port side through the second through hole and discharged from the discharge port.

2. The coating device according to claim 1 , further comprising a leakage sensor that detects the coating liquid discharged from the discharge port.

3. 3. The coating device according to claim 1, wherein the backflowing coating liquid is the coating liquid that has been replenished in an amount exceeding the capacity of the pressure tank and has caused an overflow.

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